CN114893611B - Negative pressure trigger converter and vacuum valve control system - Google Patents
Negative pressure trigger converter and vacuum valve control systemInfo
- Publication number
- CN114893611B CN114893611B CN202210529939.1A CN202210529939A CN114893611B CN 114893611 B CN114893611 B CN 114893611B CN 202210529939 A CN202210529939 A CN 202210529939A CN 114893611 B CN114893611 B CN 114893611B
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- China
- Prior art keywords
- air chamber
- diaphragm
- vacuum valve
- chamber group
- vacuum
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1262—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being spring loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1268—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like with a plurality of the diaphragms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/128—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like servo actuated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
- F16K51/02—Other details not peculiar to particular types of valves or cut-off apparatus specially adapted for high-vacuum installations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention discloses a negative pressure trigger converter and a vacuum valve control system, wherein the converter comprises a first air chamber group and a trigger mechanism, the tail end of the trigger mechanism is connected with the first air chamber group, a switching mechanism is arranged in the first air chamber group, the action of the trigger mechanism can drive the switching mechanism in the first air chamber group to act so as to control the opening and closing of a vacuum valve, and the vacuum valve control system comprises a converter and a vacuum valve, and the converter is connected with the vacuum valve so as to control the opening and closing of the vacuum valve. The invention provides a vacuum valve control system of a negative pressure trigger converter, which does not need electric power, and only generates air pressure difference by water level change in a well to realize air pressure driving so as to achieve the aim of controlling the opening and closing of a vacuum valve.
Description
Technical Field
The invention belongs to the technical field of water treatment equipment, and particularly relates to a negative pressure trigger converter and a vacuum valve control system with the same.
Background
In a vacuum conveying system, a vacuum valve is a key device for collecting access, and a converter is a detection control key device on which the vacuum valve depends. As vacuum delivery demands increase, vacuum valve converters will become a technical development and application hotspot for delivery systems.
The operation of the integral vacuum system of the actuation relation of the vacuum valve in the vacuum negative pressure well adopts the electromagnetic valve to electrically drive the vacuum valve to operate and open and close in the most traditional and simple mode, so that special power transmission lines for all wells must be arranged between each vacuum well and a vacuum station, the system can be accepted when collecting points (wells) are arranged in a small-range indoor building, but a large number of power cables are laid and buried when vacuum pumping points are arranged in a large-area (3-5 km diameter) range of an outdoor area, and therefore, a person skilled in the art actively creates a system which does not need power, and only generates air pressure difference by water level change in the well to realize gas pressure driving so as to achieve the purpose of controlling the opening and closing of the vacuum valve.
Disclosure of Invention
The invention mainly solves the technical problem of providing a negative pressure trigger converter and a vacuum valve control system with the same, which do not need electric power, and only generate air pressure difference by water level change in a well to realize air pressure driving so as to achieve the aim of controlling the opening and closing of a vacuum valve.
In order to solve the technical problems, the invention adopts a technical scheme that:
The invention provides a negative pressure trigger converter which is connected with a vacuum valve and used for controlling the opening and closing of the vacuum valve, and comprises a first air chamber group and a trigger mechanism, wherein the trigger mechanism is connected with the first air chamber group, a switching mechanism is arranged in the first air chamber group, the action of the trigger mechanism can drive the air pressure in the first air chamber group to change, and the air pressure change in the first air chamber group can drive the switching mechanism to act so as to control the opening and closing of the vacuum valve.
Further, the triggering mechanism is arranged in the second air chamber group, and the air pressure change in the second air chamber group can drive the triggering mechanism to do linear reciprocating motion.
Further, the second air chamber group is communicated with the liquid level, and the air pressure change of the second air chamber group changes along with the liquid level change of the liquid level.
Further, the switching mechanism comprises a first diaphragm and a first sliding shaft, the first diaphragm is arranged in the first air chamber group, one end of the first sliding shaft is connected with the first diaphragm, the action of the triggering mechanism causes the air pressure in the first air chamber group to change, so that the first diaphragm is driven to deform and generate displacement to drive the first sliding shaft to synchronously move, and the other end of the first sliding shaft does linear reciprocating motion between an opening position for controlling the opening of the vacuum valve and a closing position for controlling the closing of the vacuum valve.
Further, the switching mechanism further comprises a first spring, the first spring is connected to the first diaphragm and located on two sides of the first diaphragm with the first sliding shaft respectively, and when the first diaphragm deforms to generate displacement, the first spring can be extruded and the deformation can be recovered under the acting force of the first spring.
Further, the first air chamber group comprises a plurality of air channels, and the air channels are respectively communicated with vacuum and atmospheric pressure.
Further, the triggering mechanism comprises a second diaphragm and a second sliding shaft, the second diaphragm is arranged in the second air chamber group, one end of the second sliding shaft is connected with the second diaphragm, the other end of the second sliding shaft is connected with the first air chamber group, the second diaphragm can be driven to deform to generate displacement by air pressure change in the second air chamber group, and the second sliding shaft can be driven to synchronously move when the second diaphragm deforms to generate displacement.
Furthermore, the triggering mechanism further comprises a second spring, the second spring is arranged in the second air chamber group and sleeved on the periphery of the second sliding shaft, and the second spring can be extruded when the second diaphragm deforms to generate displacement and can recover deformation under the acting force of the second spring.
The invention also provides a vacuum valve control system with the negative pressure trigger converter, which comprises the converter and a vacuum valve, wherein the converter is connected with the vacuum valve to control the opening and closing of the vacuum valve.
Further, the vacuum valve comprises an upper shell, a lower shell and a third diaphragm, wherein the third diaphragm is clamped between the upper shell and the lower shell, so that the upper shell and the lower shell are sealed by the third diaphragm and are not ventilated, and the third diaphragm is a plane rubber film.
The beneficial effects of the invention are as follows:
1. The converter is designed with the first air chamber group, the second air chamber group and the triggering mechanism connected with the first air chamber group and the second air chamber group, the second air chamber group is communicated with the liquid level in the vacuum well, the triggering mechanism in the second air chamber group is used for driving the switching mechanism in the first air chamber group to act, the opening and closing of the vacuum valve can be driven by the air pressure switching of the output end (the connecting end with the vacuum valve) of the converter only by the air pressure thrust of the rising of the liquid level in the vacuum well, the opening and closing of the vacuum valve can be driven by the air pressure switching of the output end (the connecting end with the vacuum valve), the opening and closing of the vacuum valve can be realized by the large-air-volume air driving mechanism to act, and the opening and closing of the vacuum valve of a real target object can be realized by the first air chamber group switching mechanism driven by the small-air-volume air driving triggering mechanism.
2. The valve plate traction shaft of the vacuum valve is made of stainless steel, and the stainless steel has the advantages of high strength, high temperature tolerance and high corrosion resistance, and solves the problems that an original plastic shaft is poor in high temperature tolerance (lower than 70 ℃) and excessively large in expansion and deformation number, and the valve plate is not easy to close due to excessively large sliding friction of the shaft caused by deformation of the valve plate traction shaft.
The foregoing description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention more clearly understood, it can be implemented according to the content of the specification, and the following detailed description of the preferred embodiments of the present invention will be given with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural view of embodiment 1;
fig. 2 is a schematic diagram of the structure of embodiment 2 (vacuum valve on state);
fig. 3 is a schematic diagram of the structure of embodiment 2 (vacuum valve closed state);
fig. 4 is a schematic structural view of the vacuum valve in embodiment 2 (valve plate closed state);
The parts in the drawings are marked as follows:
The converter 1, the first diaphragm 11, the second sliding shaft 12, the first spring 13, the second diaphragm 14, the second sliding shaft 15, the second spring 16, the fine adjustment hole 17, the air chamber A1, the air chamber A2, the air chamber A3, the air chamber A4, the air chamber A5, the air chamber A6, the air chamber A7, the vacuum channel a, the vacuum channel B, and the atmosphere channel C;
the vacuum valve 2, the upper housing 21, the upper vent 211, the lower housing 22, the lower vent 221, the valve port 23, the third spring 24, the third diaphragm 25, the valve plate mechanism 26, the valve plate traction shaft 261, the valve plate 262;
A liquid level detecting tube 3;
high level W1, low level W0.
Detailed Description
The following specific embodiments of the invention are described in order to provide those skilled in the art with an understanding of the present disclosure. The invention may be embodied in other different forms, i.e., modified and changed without departing from the scope of the invention.
Embodiment 1. A negative pressure trigger converter is connected with a vacuum valve and is used for controlling the opening and closing of the vacuum valve, the converter 1 comprises a first air chamber group and a trigger mechanism, the trigger mechanism is arranged outside the first air chamber group, the tail end of the trigger mechanism is connected with the first air chamber group, a switching mechanism is arranged in the first air chamber group, and the trigger mechanism can drive the switching mechanism in the first air chamber group to act to control the opening and closing of the vacuum valve by performing linear reciprocating motion.
The specific mode of the triggering mechanism driving the first air chamber intra-group switching mechanism to act can be that the triggering mechanism comprises a second driving shaft, and the second sliding shaft is mechanically driven or manually driven to do linear reciprocating motion so as to drive the switching mechanism in the first air chamber group to act to control the opening and closing of the vacuum valve.
The specific mode of the triggering mechanism driving the first air chamber intra-group switching mechanism to act can be that the triggering mechanism comprises a second diaphragm 14 and a second sliding shaft 15, the second diaphragm is arranged in the second air chamber group, one end of the second sliding shaft is connected with the second diaphragm, the other end of the second sliding shaft is connected with the second air chamber group, the second diaphragm is driven to deform and generate displacement by air pressure change in the second air chamber group, the second sliding shaft can be driven to synchronously move when the second diaphragm deforms and generates displacement, and the second sliding shaft can drive the switching mechanism in the first air chamber group to act by performing linear reciprocating movement so as to control the opening and closing of the vacuum valve.
The second air chamber group is communicated with the liquid level, and the air pressure of the second air chamber group changes along with the liquid level change of the liquid level.
Specifically, as shown in fig. 1, the second air chamber group includes air chambers (A1, A2), the air chamber A1 communicates with the liquid level in the well, the air chamber A2 communicates with the atmosphere, the second diaphragm is disposed between the air chamber A1 and the air chamber A2 and makes the air chamber A1 and the air chamber A2 not ventilate each other, the second sliding shaft is disposed in the air chamber A2 and its end penetrates out of the air chamber A2 (the second sliding shaft and the air chamber A2 are in sealed movement, and a rubber sealing ring is used for sealing, so as to ensure that the gas cannot leak due to the movement of the second sliding shaft) is located in the first air chamber group.
The liquid level in the well rises to squeeze the existing air layer in the liquid level detection tube, so that the pressure of the air layer is continuously increased, the increased air pressure is transmitted to the air chamber A1 through the micro communicating pipe, continuously compressed air can be accumulated in the air chamber A1 and continuously applied to the second diaphragm, the second diaphragm is deformed and generates downward displacement, and the second diaphragm drives the second sliding shaft to move downwards.
In order to ensure that the deformation of the second diaphragm is controlled and the deformation distance can be effectively transmitted, a second spring 16 is arranged in the air chamber A2, the second spring is arranged in the air chamber A2 and coaxially arranged on the periphery of the second sliding shaft, when the second diaphragm deforms and displaces towards the first air chamber group, the second spring is used for absorbing the thrust of the deformation of the second diaphragm, and when the second diaphragm recovers the deformation, the rebound force of the second spring is used for giving the second diaphragm the deformation recovery with the thrust.
The switching mechanism comprises a first diaphragm 11 and a first sliding shaft 12, the first diaphragm is arranged in the second air chamber group, one end of the first sliding shaft is connected with the first diaphragm, the other end of the first sliding shaft is connected with the output end of the first air chamber group, and the action of the triggering mechanism causes the air pressure change in the first air chamber group, so that the first diaphragm is driven to deform to generate displacement to drive the first sliding shaft to synchronously move, and the air pressure switching of the output end of the second air chamber group is realized.
Specifically, as shown in fig. 1, the first air chamber group includes air chambers (A3, A4, A5, A6, A7), the air chamber A4 and the air chamber A5 are communicated with atmosphere, the air chamber A7 is communicated with a vacuum source, a first diaphragm is arranged between the air chamber A3 and the air chamber A4 and prevents the air chamber A3 and the air chamber A4 from being ventilated each other, a first spring 13 is arranged on the air chamber A3, a first sliding shaft is arranged on the air chamber A4 and connected with the first diaphragm, the tail end of the first sliding shaft passes through the air chamber A5 and is positioned in the air chamber A6, the air chamber A3 is provided with a vacuum channel a connected with the vacuum source, an atmosphere channel C connected with the two air chambers is arranged between the air chamber A5 and the air chamber A6, and a vacuum channel B connected with the two air chambers is arranged between the air chamber A7.
In a normal state, the tail end of the second sliding shaft is positioned in the air chamber A3 and seals and plugs the vacuum channel A, the tail end of the first sliding shaft is positioned in the air chamber A6 and seals and plugs the vacuum channel B, the air chamber A5 and the air chamber A6 are communicated at the atmospheric channel C, and at the moment, the air chamber A6 is in an atmospheric state.
Along with the rise of the liquid level in the well, the second diaphragm is extruded by the gas in the air chamber A1 to generate deformation displacement and drive the second sliding shaft to move towards the inside of the air chamber A3, the tail end of the second sliding shaft is gradually separated from the vacuum channel A, the vacuum gradually enters the air chamber A3 from the vacuum channel A, the air chamber A3 is converted into a vacuum negative pressure state, and the vacuum gas is quickly introduced from the vacuum channel A when the second sliding shaft moves, so that a sealed conical bulge plug is arranged on the second sliding shaft to block the vacuum channel A, and the plug and the vacuum channel A can be thoroughly separated only after the second sliding shaft moves to a certain degree.
The air chamber A3 is converted into a vacuum negative pressure state, the air chamber A4 is in an atmospheric state, the first diaphragm deforms and displaces towards the inside of the air chamber A3 and drives the first sliding shaft to synchronously displace, the first sliding shaft is separated from the vacuum channel B, the vacuum channel B is opened, vacuum in the air chamber A7 enters the air chamber A6, and meanwhile, the first sliding shaft displaces until the atmospheric channel C is blocked, and at the moment, the air chamber A6 is in a vacuum state.
When the vacuum channel B is opened and the atmospheric channel C is closed, vacuum in the air chamber A7 is introduced into the air chamber A6, the air chamber A6 is connected with the vacuum valve, at the moment, the converter can control the vacuum valve to be opened, the first sliding shaft is positioned at the atmospheric channel C, the position is the opening position for controlling the vacuum valve to be opened, when the vacuum channel B is closed and the atmospheric channel C is opened, the atmosphere in the air chamber A5 is introduced into the air chamber A6, the air chamber A6 is connected with the vacuum valve, at the moment, the converter can control the vacuum valve to be closed, the first sliding shaft is positioned at the vacuum channel B, the position is the closing position for controlling the vacuum valve to be opened, and therefore, the air pressure change in the first air chamber group can drive the first diaphragm to deform to generate displacement so as to drive the first sliding shaft to synchronously move, and the other end of the first sliding shaft makes linear reciprocating motion between the opening position for controlling the vacuum valve to be opened and the closing position for controlling the vacuum valve to be closed.
In order to ensure that the deformation of the first diaphragm is controlled and the deformation distance can be effectively transmitted, a first spring 13 is arranged in the air chamber A3, the first spring is arranged in the air chamber A3, when the first diaphragm deforms and displaces towards the air chamber A3, the first spring is utilized to absorb the thrust of the deformation of the first diaphragm, and when the first diaphragm recovers the deformation, the rebound force of the first spring is utilized to give the deformation recovery of the first diaphragm with the thrust.
More specifically, as shown in fig. 1, the air chamber A3 has a micro-regulating hole 17 communicating with the atmosphere, where the micro-regulating hole is used to continuously supplement the atmosphere to the air chamber A3, so that the third air chamber is gradually changed into the atmospheric pressure state, and it is worth noting that the micro-regulating hole is also continuously supplementing a trace amount of the atmosphere during the process of changing the air chamber A3 into vacuum, because the trace amount of the atmosphere is continuously pumped by the vacuum gas, compared with the amount of the vacuum gas entering the air chamber, the atmosphere introduced into the micro-regulating hole is very small and does not affect the air chamber to be changed into the vacuum state.
The vacuum channel (A, B) and the atmosphere channel C are both rubber interfaces, so that the sealing performance is good, and gas leakage can not occur.
In order to ensure that the vacuum channel B and the atmospheric channel C can be accurately abutted when the first sliding is in reciprocating movement each time and can absorb displacement deviation generated in the operation process of the first sliding shaft, a sealed conical bulge plug matched with the vacuum channel B and the atmospheric channel C is arranged on the first sliding shaft so as to block the vacuum channel B and the atmospheric channel C respectively.
The embodiment is designed with a first air chamber group and a second air chamber group, the triggering mechanism in the second air chamber group is used for driving the switching mechanism in the first air chamber group to act, and the air pressure switching of the output end (the connecting end with the vacuum valve) of the converter can be realized only by the air pressure thrust of the rising liquid level in the vacuum well to drive the vacuum valve to be opened and closed.
The first diaphragm and the second diaphragm are both plane rubber films.
In this embodiment, the air chamber A3 is driven to act by the switching mechanism after the negative pressure is introduced, so the air chamber is named as a negative pressure trigger converter.
The action process of the embodiment is as follows:
And driving the vacuum valve to open:
When the water level in the vacuum well reaches a high level, the compressed gas reaches the highest peak value in the air chamber A1 and generates deformation of a maximum pressure transmission diaphragm, the pressure difference between the air chamber A2 and the air chamber A1 enables the second diaphragm to generate deformation displacement and drive a second sliding shaft to synchronously displace, the second sliding shaft gradually breaks away from the vacuum channel A, the vacuum channel A is filled with a trace amount of vacuum gas into the air chamber A3 and quickly fills a third air chamber, the air chamber A4 is connected with the air to keep an atmospheric pressure state, the pressure difference between the air chamber A3 and the air chamber A4 enables the first diaphragm to generate deformation displacement and drive the first sliding shaft to synchronously displace, the first sliding shaft blocks the air channel C to prevent the air in the air chamber A5 from entering the air chamber A6, and simultaneously the vacuum channel B is communicated with the air chamber A7, the vacuum channel A6 is converted into a negative pressure state, and the vacuum valve is opened.
And driving the vacuum valve to close:
When the water level in the vacuum well is at the low liquid level W0, the gas pressure in the gas space in the liquid level detection tube in the vacuum well becomes larger, the air pressure difference between the gas space in the liquid level detection tube in the vacuum well becomes smaller, the negative pressure triggers the converter and the air pressure difference between the gas space A1 and the gas space A2 in the second air chamber group communicated with the liquid level to become smaller, the second diaphragm deformation is restored to be flat, and simultaneously, under the combined action of the reaction force of the second spring, the second sliding shaft is driven to return to move, the second sliding shaft gradually returns to the original position and simultaneously blocks the vacuum channel A, the entering of the vacuum gas into the air chamber A3 is blocked, and as the air chamber A3 is provided with a micro regulating hole, the air can be continuously supplemented into the air chamber A3, so that the air chamber A3 is gradually converted into the atmospheric pressure state, and is also continuously supplemented with the micro air in the vacuum process, but the micro regulating hole is continuously supplemented with the vacuum gas in the vacuum process, but the micro air is continuously pumped by the vacuum gas, compared with the vacuum gas quantity entering the vacuum chamber, the air chamber, the atmosphere introduced by the micro regulating hole is very small, and the air is not influenced by the vacuum state, the air chamber A3 is gradually returns to the vacuum state, the vacuum channel A4 is blocked, and the vacuum channel A is gradually returns to the original position, the vacuum channel A6 is gradually, and simultaneously, the vacuum channel A6 is gradually returns to the vacuum channel is gradually opened, and the vacuum channel is gradually and simultaneously, and the vacuum channel is gradually opened, and the vacuum valve is gradually and gradually opened, and is gradually opened and is gradually and gradually opened and is opened to the vacuum air pressure 6.
Embodiment 2A vacuum valve control system having the negative pressure-triggered switch described in embodiment 1, as shown in FIGS. 2-3, includes a switch 1 and a vacuum valve 2, the switch being connected to the vacuum valve to control the opening and closing of the vacuum valve.
As shown in fig. 4, the vacuum valve 2 includes an upper housing 21 having an upper vent 211, a lower housing 22 having a lower vent 221, and a third diaphragm 25 interposed between the upper and lower housings so as to be sealed by the third diaphragm and not to vent each other, wherein the third diaphragm is a planar rubber film.
In this embodiment, as shown in fig. 4, a third spring 24 is disposed in the upper housing, the third spring is connected with a third diaphragm, the valve plate mechanism is disposed in the lower housing and connected with the third diaphragm, when the upper vent is connected with vacuum and the lower vent is connected with atmospheric pressure, the third diaphragm deforms to drive the valve plate mechanism to displace toward the upper housing and press the third spring, and at this time, the opening of the vacuum valve is realized, when the lower vent is connected with vacuum and the upper vent is connected with atmospheric pressure, the air pressure difference in the upper and lower housings and the compression force of the third spring will jointly promote the third diaphragm to gradually recover to deform, and the elastic force of the third diaphragm and the acting force of the third spring jointly drive the valve plate mechanism to move toward the valve port 23, so that the closing of the vacuum valve is realized.
Specifically, as shown in fig. 4, the valve plate mechanism 26 includes a valve plate traction shaft 261 and a valve plate 262, one end of the valve plate traction shaft is connected with the third diaphragm, the other end is connected with the valve plate, and the valve plate traction shaft drives the valve plate to move along with deformation displacement of the third diaphragm. The upper and lower parts of the third diaphragm are deformed and moved up and down greatly due to the change of air pressure, and the deformation and movement distance of the third diaphragm often represents the opening and closing travel distance of the valve plate mechanism below.
In this embodiment, in order to make the valve plate closely adhere to the inner wall of the lower housing, the valve plate is coated with a layer of rubber, and the rubber coating type may be fully coated with the valve plate body or partially coated with rubber at the joint of the valve plate and the pipe, so that the micro deformation of the rubber may improve the adhesion of the contact point.
In this embodiment, considering the adhesion between the valve plate mechanism and the joint of the pipe, the valve plate mechanism is obliquely arranged, that is, the stroke direction of the valve plate traction shaft has an included angle with the water flow direction, the included angle is 20-75 °, and the valve plate traction shaft is perpendicular to the valve port.
In this embodiment, the valve plate traction shaft is made of stainless steel, which has the advantages of high strength, high temperature tolerance and high corrosion resistance, and solves the problems that the original plastic shaft has poor high temperature tolerance (the temperature is required to be lower than 70 ℃) and is excessively large in expansion and deformation number, and the valve plate is not easy to close due to excessive sliding friction of the shaft caused by deformation of the valve plate traction shaft.
In this embodiment, the upper and lower housings of the vacuum valve may be made of stainless steel, metal, alloy, or various plastics (PVC, PE, PP, fiberglass, PA, etc.).
In this embodiment, since the deformation displacement of the third diaphragm often represents the opening and closing travel distance of the valve plate mechanism below, the third diaphragm must have various characteristics of high tightness, large movement variable, and resistance to being pulled and extruded and not easy to be damaged, so most of the third diaphragm is made of plastic materials with pressure resistance and deformability, such as modified rubber, teflon or silica gel sheets. Since a longer actuation stroke allows a higher and more complete opening of the valve plate, whereas a long actuation stroke occurs completely subject to the deformation of the third diaphragm connected to the valve plate mechanism, a highly elastic, highly deformable plastic rubber diaphragm is necessary.
In this embodiment, the connection between the pipes, the connection between the upper shell and the lower shell, etc. may be made by using multiple modes such as flange connection, connection between teeth by any xian or pipe clip connection.
In this embodiment, the converter may be connected to and control the opening and closing of various vacuum valves having the same function but different structures on the market, and is not limited to the vacuum valve described in this embodiment, which is merely exemplary and non-limiting.
The working principle or working flow of the invention is as follows:
the vacuum valve is opened:
when the water level in the vacuum well reaches a high level, the compressed gas reaches the highest peak value in the air chamber A1 and generates deformation of a maximum pressure transmission diaphragm, the pressure difference between the air chamber A2 and the air chamber A1 enables the second diaphragm to generate deformation displacement and drive the second sliding shaft to synchronously displace, the second sliding shaft gradually breaks away from the vacuum channel A, the vacuum channel A is connected with the air chamber A3 to be filled with a trace of vacuum gas and quickly fills the third air chamber, the air chamber A4 is connected with the air to keep an atmospheric pressure state, the pressure difference between the air chamber A3 and the air chamber A4 enables the first diaphragm to generate deformation displacement and drive the first sliding shaft to synchronously displace, the first sliding shaft blocks the air channel C to prevent the air in the air chamber A5 from entering the air chamber A6, and simultaneously the vacuum channel B is communicated with the air chamber A6, the negative pressure channel A6 is converted into a state, the vacuum valve plate is communicated with the vacuum valve plate and the vacuum valve plate, and the vacuum valve plate is gradually displaced in the direction when the vacuum channel A6 is communicated with the vacuum valve plate, and the vacuum valve plate is gradually displaced in the vacuum valve plate is opened, and the vacuum valve plate is gradually displaced in the direction when the vacuum valve plate is opened, and the vacuum valve plate is gradually displaced in the vacuum valve plate is opened.
The vacuum valve is closed:
When the water level in the vacuum well is at the low liquid level W0, the gas pressure in the gas space in the liquid level detecting tube 3 in the vacuum well becomes larger, the gas pressure difference between the gas chambers A1 and A2 in the second gas chamber group communicated with the liquid level by the negative pressure trigger converter becomes smaller, the deformation of the second diaphragm is restored to be flat, and simultaneously the second sliding shaft is driven to return under the combined action of the reaction force of the second spring, the second sliding shaft gradually returns to the original position and simultaneously blocks the vacuum channel A, the vacuum gas entering the gas chamber A3 is blocked, and as the gas chamber A3 is provided with a micro-regulating hole, the air continuously enters the gas chamber A3, so that the gas chamber A3 is gradually converted into the atmospheric pressure state, and the micro-regulating hole is continuously supplied with trace air in the vacuum process, but the trace air is continuously supplied with the vacuum gas for the pumping treatment, compared with the vacuum gas entering the gas chamber, the atmosphere introduced by the fine adjusting hole is very small and does not influence the conversion of the air chamber A3 into a vacuum state, no pressure difference exists between the air chamber A3 and the air chamber A4 after the air chamber A3 is converted into the atmosphere state, the first diaphragm gradually moves towards flatness gradually along with the speed of the air chamber A3 returning to the atmosphere state, meanwhile, the first sliding shaft is driven to synchronously move, the first sliding shaft returns to the original position to block the vacuum channel B so as to cut off the vacuum from being introduced, meanwhile, the atmosphere channel C is opened to make the atmosphere in the air chamber A5 be supplemented into the air chamber A6, after the air chamber A6 is gradually converted into the atmosphere state, the air chamber A6 is communicated with the vacuum valve, namely, when the upper vent and the lower vent of the vacuum valve are communicated with the atmosphere, the third diaphragm is deformed and recovered, the valve plate mechanism is jointly pushed to move towards the lower shell direction to abut against the valve port in the pipeline under the huge reaction force of the spring, the valve plate is sealed and attached to the valve port, then the vacuum valve is closed, the water flow in the pipeline is cut off.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
In the description of the present invention, unless otherwise indicated, the meaning of "plurality" is two or more, and the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected" and "connected" are to be construed broadly, and for example, they may be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Claims (7)
1. The negative pressure trigger converter is connected with a vacuum valve and used for controlling the opening and closing of the vacuum valve, and is characterized by comprising a first air chamber group and a trigger mechanism, wherein the trigger mechanism is connected with the first air chamber group, a switching mechanism is arranged in the first air chamber group, the action of the trigger mechanism can drive the air pressure in the first air chamber group to change, and the air pressure change in the first air chamber group can drive the switching mechanism to act so as to control the opening and closing of the vacuum valve;
the triggering mechanism is arranged in the second air chamber group, and the air pressure change in the second air chamber group can drive the triggering mechanism to do linear reciprocating motion;
The switching mechanism comprises a first diaphragm and a first sliding shaft, the first diaphragm is arranged in the first air chamber group, one end of the first sliding shaft is connected with the first diaphragm, the action of the triggering mechanism causes the air pressure in the first air chamber group to change, so that the first diaphragm is driven to deform to generate displacement to drive the first sliding shaft to synchronously move, and the other end of the first sliding shaft does linear reciprocating motion between an opening position for controlling the opening of the vacuum valve and a closing position for controlling the closing of the vacuum valve;
The trigger mechanism comprises a second diaphragm and a second sliding shaft, the second diaphragm is arranged in the second air chamber group, one end of the second sliding shaft is connected with the second diaphragm, the other end of the second sliding shaft is connected with the first air chamber group, the second diaphragm can be driven to deform to generate displacement by air pressure change in the second air chamber group, and the second sliding shaft can be driven to synchronously move when the second diaphragm deforms to generate displacement.
2. The negative pressure trigger transducer of claim 1, wherein the second air chamber group is communicated with the liquid level, and the air pressure change of the second air chamber group is changed along with the liquid level change of the liquid level.
3. The negative pressure trigger transducer of claim 1, wherein the switching mechanism further comprises a first spring, the first spring is connected to the first diaphragm and is located on two sides of the first diaphragm respectively with the first sliding shaft, and when the first diaphragm deforms to generate displacement, the first spring can be extruded and the deformation can be recovered under the acting force of the first spring.
4. The negative pressure trigger transducer of claim 1, wherein the first air chamber group comprises a plurality of air passages, the plurality of air passages being in communication with vacuum and atmospheric pressure, respectively.
5. The negative pressure trigger transducer of claim 1, wherein the trigger mechanism further comprises a second spring, the second spring is arranged in the second air chamber group and sleeved on the periphery of the second sliding shaft, and the second spring can be extruded and recovered to deform under the action of the second spring when the second diaphragm deforms to displace.
6. A vacuum valve control system having a negative pressure triggered transducer as claimed in any one of claims 1 to 5, comprising a transducer and a vacuum valve, the transducer being connected to the vacuum valve to control the opening and closing of the vacuum valve.
7. The vacuum valve control system according to claim 6, wherein the vacuum valve comprises an upper case, a lower case, and a third diaphragm interposed between the upper case and the lower case so that the upper case and the lower case are sealed by the third diaphragm and are not ventilated with each other, and the third diaphragm is a planar rubber film.
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| JPH03279672A (en) * | 1990-03-28 | 1991-12-10 | Hitachi Ltd | air flow control device |
| JP3702949B2 (en) * | 2001-06-13 | 2005-10-05 | 株式会社タツノ・メカトロニクス | Liquid supply nozzle |
| CN202812302U (en) * | 2012-09-27 | 2013-03-20 | 吴小学 | Hydraulic membrane two-position three-way valve |
| CN112128424B (en) * | 2020-09-28 | 2024-08-23 | 清环拓达(苏州)环境科技有限公司 | Liquid level control system |
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| CN217951403U (en) * | 2022-05-16 | 2022-12-02 | 苏州中鹿环保设备有限公司 | Negative pressure trigger converter and vacuum valve control system |
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