CN113187947A - Small-size pneumatic stop valve under limited space working condition - Google Patents
Small-size pneumatic stop valve under limited space working condition Download PDFInfo
- Publication number
- CN113187947A CN113187947A CN202110490032.4A CN202110490032A CN113187947A CN 113187947 A CN113187947 A CN 113187947A CN 202110490032 A CN202110490032 A CN 202110490032A CN 113187947 A CN113187947 A CN 113187947A
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- cylinder
- valve
- small
- piston
- valve body
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- 238000007789 sealing Methods 0.000 claims abstract description 59
- 230000007246 mechanism Effects 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 9
- 230000002457 bidirectional effect Effects 0.000 abstract description 16
- 238000013461 design Methods 0.000 abstract description 5
- 238000012856 packing Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
-
- 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
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Actuator (AREA)
Abstract
The invention discloses a small-size pneumatic stop valve under a space-limited working condition, which solves the technical problem that the driving force of a small-size valve is insufficient under the space-limited working condition in the prior art. The valve comprises a valve body, a valve rod arranged in the valve body, and a cylinder arranged on the valve body, wherein a piston rod connected with the valve rod and a cylinder cavity with at least two gas paths connected in series are arranged in the cylinder, a cylinder piston is arranged in the cylinder cavity, and the piston rod is connected with the cylinder piston. The bidirectional high-pressure-difference sealing device is simple in structure, scientific and reasonable in design, convenient to use, small in size, capable of achieving bidirectional high-pressure-difference sealing and capable of effectively meeting the requirement for bidirectional high-pressure-difference sealing of the small-size valve under the working condition that the space is limited.
Description
Technical Field
The invention belongs to the technical field of general valve structures, and particularly relates to a small-size pneumatic stop valve under a space-limited working condition.
Background
The driving force of the pneumatic valve is derived from a cylinder, and the magnitude of the driving force of the pneumatic valve is determined by the size of the cylinder and the air pressure of the instrument. In most cases, the gauge air pressure is fixed, and therefore the size of the pneumatic valve cylinder directly determines the size of the pneumatic valve driving force.
Under the working condition that some spaces are limited, the space for installing the pneumatic valve is narrow, the size of the pneumatic valve needs to be reduced as much as possible, especially when the pneumatic valve needs to be installed in a row, the requirement on the size of the pneumatic valve is stricter, and the width of the pneumatic valve needs to be reduced as much as possible.
Therefore, under the working condition of limited space, the size of the valve is compressed to be small, the diameter of the pneumatic valve is severely limited, and the driving force of the pneumatic valve is limited, so that the valve is difficult to bear bidirectional high pressure difference, and the application range is limited.
Therefore, design small-size pneumatic stop valve under the limited operating mode in space, adopt small-size in order being applicable to the limited operating mode in space, can also realize two-way high pressure differential simultaneously and seal in order to satisfy bigger application scope, become the technical problem that technical staff in the technical field of the part awaited a urgent need to solve.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the small-size pneumatic stop valve under the working condition of limited space is provided to solve at least part of technical problems.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a small-size pneumatic stop valve under limited operating mode in space, includes the valve body, installs the valve rod in the valve body to and locate the cylinder on the valve body, be equipped with the piston rod that is connected with the valve rod in the cylinder and the cylinder chamber of two at least gas circuits series connection each other, the cylinder intracavity is equipped with cylinder piston, and the piston rod is connected with cylinder piston.
Furthermore, a vent hole for communicating the two cylinder cavities is formed in the piston rod between the two adjacent cylinder cavities.
Furthermore, the cylinder is provided with an instrument air communication port communicated with one cylinder cavity.
Furthermore, an air inlet and an air outlet communicated with the air cylinder cavity are formed in the air cylinder.
Further, the air inlet and outlet ports are located below the cylinder piston.
Further, the cylinder jacket is installed on the valve body to be equipped with first sealing washer between cylinder and the valve body.
Furthermore, a return spring is arranged between the valve body of the valve and the cylinder piston close to the valve body of the valve.
And a second sealing ring is arranged between the cylinder piston and the inner wall of the cylinder cavity.
Further, a first sealing mechanism is arranged between the piston rod and the inner wall of the cylinder.
Further, a second sealing mechanism is arranged between the valve rod and the valve body of the valve.
Compared with the prior art, the invention has the following beneficial effects:
the bidirectional high-pressure-difference sealing device is simple in structure, scientific and reasonable in design, convenient to use, small in size, capable of achieving bidirectional high-pressure-difference sealing and capable of effectively meeting the requirement for bidirectional high-pressure-difference sealing of the small-size valve under the working condition that the space is limited.
The invention mainly comprises a valve body and an air cylinder which is hermetically connected with the valve body, wherein a piston rod in the air cylinder and a valve rod in the valve body are in an integrated structure, at least two air cylinder cavities are arranged in the air cylinder, a piston connected with the piston rod is arranged in each air cylinder cavity, air passages of the air cylinder cavities are mutually connected in series and communicated, when instrument air is filled in the air cylinder cavities, the inner pistons run, the piston rods connected with the pistons run synchronously, the valve rods connected with the piston rods run synchronously, the more the number of the air cylinder cavities in the air cylinder is, the larger the stress of the piston rods is, and the larger the driving force of the valve rods is, so that when the air pressure of the instrument air is fixed, the larger the number of the air cylinder cavities in the air cylinder is, the larger the driving force of the valve is, and thus, the requirements on small size can be met, and the requirements on bidirectional high pressure difference sealing can also be met.
The instrument air communicating port communicated with one cylinder cavity on the cylinder is convenient to communicate with the outside instrument air, the piston rod is provided with the vent holes to communicate the adjacent cylinder cavities, when a plurality of cylinder cavities are provided, the piston rod is provided with one vent hole between the adjacent cylinder cavities, so that all the cylinder cavities can be communicated, when the instrument air enters the cylinder cavity communicated with the instrument air communicating port from the instrument air communicating port, the instrument air in the cylinder cavity enters the cylinder cavity adjacent to the instrument air communicating port through the vent hole on the piston rod, so that all the cylinder cavities can be filled with the instrument air with equal pressure through the vent holes, and the driving force of the valve rod is doubled when one cylinder cavity is added in the cylinder, therefore, the pneumatic stop valve can also meet the requirement of bidirectional high pressure difference sealing under the small-size specification. According to the invention, the vent hole is formed in the piston rod, and a gas circuit pipeline does not need to be connected inside and outside the cylinder, so that the structure is more neat and compact to reduce the size of the cylinder, and the manufacturing cost of the cylinder and the maintenance cost of the gas circuit pipeline can be saved.
Each cylinder cavity of the invention is communicated with an air inlet and outlet, and the air inlet and outlet is positioned below the cylinder piston, namely positioned at the bottom in the cylinder cavity, so that when the piston runs in the cylinder cavity, the piston runs away from the air inlet and outlet, then the outside air enters the cavity positioned below the piston in the cylinder cavity through the air inlet and outlet, the piston runs close to the air inlet and outlet, and then the air in the cavity positioned below the piston in the cylinder cavity is discharged to the outside through the air inlet and outlet, thus the resistance of the piston running can be effectively reduced, and the driving force is further improved.
The cylinder sleeve of the invention is arranged above the valve body of the valve, thereby facilitating the connection and fixation of the piston rod and the valve rod, and meanwhile, a first sealing ring is arranged between the cylinder and the valve body of the valve, thereby forming a cylinder cavity closest to the valve body between the cylinder and the valve body, when the instrument air enters the cylinder cavity through the instrument air communicating port, the piston moves downwards, the piston rod and the valve rod move downwards synchronously, the valve is closed, when the valve needs to be opened, the communication between the instrument gas communication port and the instrument gas is released, the instrument gas above the cylinder piston in the cylinder is discharged outside through the instrument gas communication port, when the valve needs to be opened, the valve can be opened by communicating instrument gas to the gas inlet and outlet and driving the valve to open through the instrument gas, or by installing a reset spring in the cylinder cavity closest to the valve body and opening the valve by the reset spring, or by simultaneously filling the reset spring and the instrument gas into the cylinder cavity through the gas inlet and outlet and driving the valve to open.
Sealing mechanisms are arranged between the cylinder piston and the inner wall of the cylinder cavity, between the piston rod and the inner wall of the cylinder and between the valve rod and the valve body of the valve, wherein the sealing mechanisms between the cylinder piston and the inner wall of the cylinder cavity are preferably provided with sealing rings, and the sealing mechanisms between the piston rod and the inner wall of the cylinder and between the valve rod and the valve body of the valve can be selected from sealing rings, sealing pressure spring sealing pieces, sealing packing or the combination of two or more of the sealing rings, the sealing pressure spring sealing pieces and the sealing packing for sealing. Therefore, the requirement of bidirectional high pressure difference sealing operation of the cylinder and the valve can be effectively met.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic view of the small-sized pneumatic stop valve of the present invention in an open state.
Wherein, the names corresponding to the reference numbers are:
1-valve body, 2-valve rod, 3-cylinder, 4-piston rod, 5-cylinder piston, 6-vent hole, 7-instrument air communicating port, 8-inlet and outlet port, 9-first sealing ring, 10-cylinder cavity, 11-reset spring, 12-second sealing ring, 13-first sealing mechanism and 14-second sealing mechanism.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and thus, it should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" 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, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; of course, mechanical connection and electrical connection are also possible; alternatively, they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 and 2 show a small-sized pneumatic stop valve of the present invention in a closed state in fig. 1, and in an open state in fig. 2. The small-size pneumatic stop valve under the working condition of limited space provided by the invention has the advantages of simple structure, scientific and reasonable design, convenience in use and small size, can realize bidirectional high pressure difference sealing, and can effectively meet the bidirectional high pressure difference sealing requirement of the small-size valve under the working condition of limited space. The valve comprises a valve body 1, a valve rod 2 arranged in the valve body 1, and a cylinder 3 arranged on the valve body 1, wherein a piston rod 4 connected with the valve rod 2 and a cylinder cavity 10 with at least two gas paths connected in series are arranged in the cylinder 3, a cylinder piston 5 is arranged in the cylinder cavity 10, and the piston rod 4 is connected with the cylinder piston 5.
The invention mainly comprises a valve body and an air cylinder which is hermetically connected with the valve body, wherein a piston rod in the air cylinder and a valve rod in the valve body are in an integrated structure, at least two air cylinder cavities are arranged in the air cylinder, a piston connected with the piston rod is arranged in each air cylinder cavity, air passages of the air cylinder cavities are mutually connected in series and communicated, when instrument air is filled in the air cylinder cavities, the inner pistons run, the piston rods connected with the pistons run synchronously, the valve rods connected with the piston rods run synchronously, the more the number of the air cylinder cavities in the air cylinder is, the larger the stress of the piston rods is, and the larger the driving force of the valve rods is, so that when the air pressure of the instrument air is fixed, the larger the number of the air cylinder cavities in the air cylinder is, the larger the driving force of the valve is, and thus, the requirements on small size can be met, and the requirements on bidirectional high pressure difference sealing can also be met.
The piston rod 4 positioned between two adjacent cylinder cavities 10 is provided with a vent hole 6 for communicating the two cylinder cavities 10. The cylinder 3 is provided with an instrument air communicating port 7 communicated with a cylinder cavity 10.
The instrument air communicating port communicated with one cylinder cavity on the cylinder is convenient to communicate with the outside instrument air, the piston rod is provided with the vent holes to communicate the adjacent cylinder cavities, when a plurality of cylinder cavities are provided, the piston rod is provided with one vent hole between the adjacent cylinder cavities, so that all the cylinder cavities can be communicated, when the instrument air enters the cylinder cavity communicated with the instrument air communicating port from the instrument air communicating port, the instrument air in the cylinder cavity enters the cylinder cavity adjacent to the instrument air communicating port through the vent hole on the piston rod, so that all the cylinder cavities can be filled with the instrument air with equal pressure through the vent holes, and the driving force of the valve rod is doubled when one cylinder cavity is added in the cylinder, therefore, the pneumatic stop valve can also meet the requirement of bidirectional high pressure difference sealing under the small-size specification. According to the invention, the vent hole is formed in the piston rod, and a gas circuit pipeline does not need to be connected inside and outside the cylinder, so that the structure is more neat and compact to reduce the size of the cylinder, and the manufacturing cost of the cylinder and the maintenance cost of the gas circuit pipeline can be saved.
The cylinder 3 of the invention is provided with an air inlet and outlet 8 communicated with a cylinder cavity 10, and the air inlet and outlet 8 is positioned below the cylinder piston 5.
Each cylinder cavity of the invention is communicated with an air inlet and outlet, and the air inlet and outlet is positioned below the cylinder piston, namely positioned at the bottom in the cylinder cavity, so that when the piston runs in the cylinder cavity, the piston runs away from the air inlet and outlet, then the outside air enters the cavity positioned below the piston in the cylinder cavity through the air inlet and outlet, the piston runs close to the air inlet and outlet, and then the air in the cavity positioned below the piston in the cylinder cavity is discharged to the outside through the air inlet and outlet, thus the resistance of the piston running can be effectively reduced, and the driving force is further improved.
The cylinder 3 of the invention is sleeved on the valve body 1, and a first sealing ring 9 is arranged between the cylinder 3 and the valve body 1. A return spring 11 is arranged between the valve body 1 and the cylinder piston 5 close to the valve body 1.
The cylinder sleeve of the invention is arranged above the valve body of the valve, thereby facilitating the connection and fixation of the piston rod and the valve rod, and meanwhile, a first sealing ring is arranged between the cylinder and the valve body of the valve, thereby forming a cylinder cavity closest to the valve body between the cylinder and the valve body, when the instrument air enters the cylinder cavity through the instrument air communicating port, the piston moves downwards, the piston rod and the valve rod move downwards synchronously, the valve is closed, when the valve needs to be opened, the communication between the instrument gas communication port and the instrument gas is released, the instrument gas above the cylinder piston in the cylinder is discharged outside through the instrument gas communication port, when the valve needs to be opened, the valve can be opened by communicating instrument gas to the gas inlet and outlet and driving the valve to open through the instrument gas, or by installing a reset spring in the cylinder cavity closest to the valve body and opening the valve by the reset spring, or by simultaneously filling the reset spring and the instrument gas into the cylinder cavity through the gas inlet and outlet and driving the valve to open.
A second sealing ring 12 is arranged between the cylinder piston 5 and the inner wall of the cylinder cavity 10. A first sealing mechanism 13 is arranged between the piston rod 4 and the inner wall of the cylinder 3. A second sealing mechanism 14 is arranged between the valve rod 2 and the valve body 1.
Sealing mechanisms are arranged between the cylinder piston and the inner wall of the cylinder cavity, between the piston rod and the inner wall of the cylinder and between the valve rod and the valve body of the valve, wherein the sealing mechanisms between the cylinder piston and the inner wall of the cylinder cavity are preferably provided with sealing rings, and the sealing mechanisms between the piston rod and the inner wall of the cylinder and between the valve rod and the valve body of the valve can be selected from sealing rings, sealing pressure spring sealing pieces, sealing packing or the combination of two or more of the sealing rings, the sealing pressure spring sealing pieces and the sealing packing for sealing. Therefore, the requirement of bidirectional high pressure difference sealing operation of the cylinder and the valve can be effectively met.
The invention designs a small-drift-diameter high-pressure-difference stop valve which adopts a series cylinder cavity, and under the condition that the diameter of a cylinder is smaller, a plurality of cylinder cavities are connected in series, so that the driving force is increased, and the bidirectional high-pressure-difference sealing of a valve is realized.
As shown in figure 1, the piston rod is provided with the vent hole, so that the upper cylinder cavity is communicated with the lower cylinder cavity, and when instrument air enters from the instrument air communication port, the instrument air not only enters the upper cylinder cavity, but also enters the lower cylinder cavity through the vent hole. The compressed air drives both pistons simultaneously, doubling the driving force. In the same way, more cylinders can be connected in series to achieve a greater driving force. And all cylinders only need an instrument air communicating port to intake instrument air, so that the size of the valve can be effectively reduced. The valve can be opened by a spring, or the air of the instrument is introduced into the air inlet and the air outlet to drive the piston to move upwards to open the valve, or the valve is driven to open by combining a return spring and the instrument.
Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, but not to limit the technical solutions, and certainly not to limit the patent scope of the present invention; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; that is, the technical problems to be solved by the present invention, which are not substantially changed or supplemented by the spirit and the concept of the main body of the present invention, are still consistent with the present invention and shall be included in the scope of the present invention; in addition, the technical scheme of the invention is directly or indirectly applied to other related technical fields, and the technical scheme is included in the patent protection scope of the invention.
Claims (10)
1. The utility model provides a small-size pneumatic stop valve under limited operating mode in space, its characterized in that, includes valve body (1), installs valve rod (2) in valve body (1) to and locate cylinder (3) on valve body (1), be equipped with in cylinder (3) with piston rod (4) that valve rod (2) are connected, and cylinder chamber (10) of two at least gas circuits series connection each other, be equipped with cylinder piston (5) in cylinder chamber (10), piston rod (4) are connected with cylinder piston (5).
2. The small-size pneumatic stop valve under the condition of limited space according to claim 1, characterized in that a vent hole (6) communicating the two cylinder cavities (10) is formed in the piston rod (4) positioned between the two adjacent cylinder cavities (10).
3. The small-size pneumatic stop valve under the working condition of limited space as claimed in claim 1, wherein the cylinder (3) is provided with an instrument air communication port (7) communicated with a cylinder cavity (10).
4. The small-size pneumatic stop valve under the working condition of limited space as claimed in claim 1, wherein the cylinder (3) is provided with an air inlet and outlet (8) communicated with the cylinder cavity (10).
5. A small-sized pneumatic stop valve under the condition of limited space according to claim 4, characterized in that the air inlet and outlet (8) is positioned below the cylinder piston (5).
6. The small-size pneumatic stop valve under the limited-space working condition as claimed in claim 1, characterized in that the cylinder (3) is sleeved on the valve body (1), and a first sealing ring (9) is arranged between the cylinder (3) and the valve body (1).
7. The pneumatic stop valve in a limited space working condition as claimed in claim 6, characterized in that a return spring (11) is arranged between the valve body (1) and the cylinder piston (5) close to the valve body (1).
8. The pneumatic stop valve in a limited space working condition as claimed in claim 1, characterized in that a second sealing ring (12) is arranged between the cylinder piston (5) and the inner wall of the cylinder cavity (10).
9. The pneumatic stop valve with the small size under the condition of limited space as claimed in claim 1, characterized in that a first sealing mechanism (13) is arranged between the piston rod (4) and the inner wall of the cylinder (3).
10. The pneumatic stop valve with the small size under the limited space working condition as claimed in claim 1, wherein a second sealing mechanism (14) is arranged between the valve rod (2) and the valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110490032.4A CN113187947A (en) | 2021-05-06 | 2021-05-06 | Small-size pneumatic stop valve under limited space working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110490032.4A CN113187947A (en) | 2021-05-06 | 2021-05-06 | Small-size pneumatic stop valve under limited space working condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113187947A true CN113187947A (en) | 2021-07-30 |
Family
ID=76983857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110490032.4A Pending CN113187947A (en) | 2021-05-06 | 2021-05-06 | Small-size pneumatic stop valve under limited space working condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113187947A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2599337Y (en) * | 2003-02-24 | 2004-01-14 | 赵国大 | Normally opened pneumatic piston cut-off valve |
| JP2005140250A (en) * | 2003-11-07 | 2005-06-02 | Nissan Motor Co Ltd | Multi-stage piston type cylinder |
| CN201269356Y (en) * | 2008-09-09 | 2009-07-08 | 上海明珠阀门制造有限公司 | Miniature bellows pneumatic break valve |
| US20100314120A1 (en) * | 2009-06-10 | 2010-12-16 | Plunkett Kevin R | Dual Acting Rod Piston Control System |
| CN202991692U (en) * | 2012-10-31 | 2013-06-12 | 深圳市鸿栢科技实业有限公司 | Multi-force multi-stroke cylinder |
| CN105351600A (en) * | 2015-11-27 | 2016-02-24 | 安徽六国化工股份有限公司 | Pneumatic valve using air cylinder as actuator |
-
2021
- 2021-05-06 CN CN202110490032.4A patent/CN113187947A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2599337Y (en) * | 2003-02-24 | 2004-01-14 | 赵国大 | Normally opened pneumatic piston cut-off valve |
| JP2005140250A (en) * | 2003-11-07 | 2005-06-02 | Nissan Motor Co Ltd | Multi-stage piston type cylinder |
| CN201269356Y (en) * | 2008-09-09 | 2009-07-08 | 上海明珠阀门制造有限公司 | Miniature bellows pneumatic break valve |
| US20100314120A1 (en) * | 2009-06-10 | 2010-12-16 | Plunkett Kevin R | Dual Acting Rod Piston Control System |
| CN202991692U (en) * | 2012-10-31 | 2013-06-12 | 深圳市鸿栢科技实业有限公司 | Multi-force multi-stroke cylinder |
| CN105351600A (en) * | 2015-11-27 | 2016-02-24 | 安徽六国化工股份有限公司 | Pneumatic valve using air cylinder as actuator |
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Application publication date: 20210730 |