CN221958669U - Gas cylinder valve group and gas source device - Google Patents

Abstract

The utility model belongs to the technical field of gas storage, and discloses a gas cylinder valve group and a gas source device, wherein the gas cylinder valve group has a one-way flow limiting valve located inside the gas cylinder, the one-way flow limiting valve has a first flow channel and a second flow channel, and the first flow channel and the second flow channel can both communicate with the inside of the gas cylinder and the bottle mouth valve; the one-way flow limiting valve includes a first valve body and a first valve plug, the first valve plug is movably arranged inside the first valve body, and is configured to block the first flow channel under the action of the gas inside the gas cylinder, and to open the first flow channel under the action of the gas flowing in from the bottle mouth valve; the first valve body is provided with a flow limiting hole that can connect the first flow channel and the second flow channel; when the first valve plug blocks the first flow channel, the gas inside the gas cylinder is configured to flow to the bottle mouth valve through the second flow channel, the flow limiting hole and the first flow channel in sequence; the gas source device includes a gas cylinder and a gas cylinder valve group. The gas cylinder valve group in the utility model can enable the gas cylinder to achieve rapid inflation and slow release of gas, which is conducive to reducing safety hazards.

Description

Gas cylinder valve group and gas source device

Technical Field

The utility model relates to the technical field of gas storage, in particular to a gas cylinder valve group and a gas source device.

Background Art

Gas cylinders are a type of movable pressure vessels used to fill gas. They have a wide range of applications, and the safe use of gas cylinders is also very critical, especially for gas cylinders filled with dangerous gases. At present, in order to avoid accidental opening of valves or large-scale leakage accidents caused by rupture of downstream pipelines during use, a flow-limiting orifice plate is usually installed at the gas outlet to control the gas release rate, so that operators can deal with accidents in a timely manner. However, each time the gas cylinder is filled with gas, in order to quickly inflate, the flow-limiting orifice plate needs to be removed and reinstalled after filling is completed. The operation is cumbersome. In actual applications, operators tend to forget to install the flow-limiting orifice plate after the gas is filled, which poses certain safety hazards to the subsequent use of the gas cylinder.

In order to prevent accidents of large-scale gas leakage in gas cylinders, the related technology adopts a solution of installing a pressure regulating device at the gas outlet valve of the gas cylinder, without installing a flow limiting orifice plate, and slowly and safely extracting and transporting the gas in the gas cylinder through vacuum. However, the gas outlet valve in this solution cannot be inflated, and an additional inflating valve needs to be integrated to achieve rapid inflation of the gas cylinder. The double-headed valve form not only increases the cost, but also still has the risk of large-scale gas leakage in the gas cylinder due to the accidental opening of the inflating valve.

Utility Model Content

The utility model aims to provide a gas cylinder valve group and a gas source device, which can realize the rapid inflation and slow release of gas in the gas cylinder without integrating a double-head valve.

To achieve this purpose, the utility model adopts the following technical solutions:

In the first aspect, the utility model provides a gas cylinder valve group, including a bottle mouth valve and a directional flow limiting mechanism, wherein the directional flow limiting mechanism is arranged inside the gas cylinder and is connected to the inside of the bottle mouth valve; the directional flow limiting mechanism includes a shell and a one-way flow limiting valve, the shell is connected to the bottle mouth valve, the shell has a accommodating cavity, and the accommodating cavity communicates with the inside of the gas cylinder and the bottle mouth valve; the one-way flow limiting valve is arranged inside the accommodating cavity, the one-way flow limiting valve includes a first valve body and a first valve plug, a part of the first valve body is spaced apart from the inner wall of the accommodating cavity, the inside of the first valve body is a first flow channel, and the gap between the first valve body and the inner wall of the accommodating cavity The first flow channel is a second flow channel, and the first flow channel and the second flow channel can both communicate with the interior of the gas cylinder and the bottle mouth valve; the first valve plug is movably arranged inside the first valve body, and is configured to block the first flow channel under the action of the gas inside the gas cylinder, and open the first flow channel under the action of the gas flowing in from the bottle mouth valve; a limiting flow hole is arranged on the first valve body, and the limiting flow hole can communicate with the first flow channel and the second flow channel; when the first valve plug blocks the first flow channel, the gas inside the gas cylinder is configured to flow to the bottle mouth valve through the second flow channel, the limiting flow hole and the first flow channel in sequence.

Preferably, the first valve body can move in the accommodating cavity along the extension direction of the first flow channel, and a first boss is provided on the outer peripheral surface of the first valve body, and the first boss can abut against the shell, and when the first boss abuts against the shell, the flow limiting hole and the second flow channel are not connected.

Preferably, a first elastic member is provided between the first valve body and the housing, and the first elastic member can generate elastic deformation so that the first valve body has a tendency to move away from the abutment position between the first boss and the housing.

Preferably, the first boss is disposed between the flow limiting hole and the first valve plug.

Preferably, the one-way flow limiting valve also includes a second elastic member, one end of which is connected or abuts against one side of the first valve plug, and the other end is connected or abuts against the shell or the first valve body, and the second elastic member can produce elastic deformation so that the first valve plug always has a tendency to block the first flow channel.

Preferably, a second boss is provided on the inner wall of the first valve body, the second boss extends circumferentially along the first valve body and encloses a vent hole, the second boss is located between the flow limiting hole and the first valve plug, the first valve plug includes a first disc segment and a second disc segment connected to each other, the first disc segment can penetrate the vent hole and the second disc segment can abut against the second boss.

Preferably, the shell includes a first shell and a second shell fixedly connected to each other, one of the first shell and the second shell is sleeved and connected to the outer circumference of the other, and the first shell and the second shell enclose the accommodating cavity.

Preferably, the bottle mouth valve includes a second valve body and a second valve plug, the second valve body is connected to the outlet of the gas cylinder, the second valve body is provided with a third flow channel connected to the interior of the gas cylinder, and a fourth flow channel connected to the outside, the third flow channel and the fourth flow channel are connected to each other, and the second valve plug is movably arranged in the second valve body and can block the third flow channel.

Preferably, a switch portion is provided above the second valve body, and the switch portion can drive the second valve plug to move.

In a second aspect, the utility model further provides a gas source device, comprising a gas cylinder and the gas cylinder valve group described in the first aspect, wherein the gas cylinder valve group is used to control the gas cylinder to achieve gas filling or gas output.

Beneficial effects of the utility model:

The utility model provides a gas cylinder valve group, which, through the action of a directional flow limiting mechanism, enables each gas cylinder to be inflated and used with only one single-head valve integrated, and through the one-way flow limiting valve in the directional flow limiting mechanism, can achieve rapid inflation and slow release of gas during the use of the gas cylinder, which is beneficial to improving the inflation efficiency and reducing the gas emission during gas use, avoiding accidents of large-scale gas leakage, and effectively reducing safety hazards.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a gas cylinder during rapid inflation according to an embodiment of the present utility model;

FIG2 is a partial enlarged view of point A in FIG1;

FIG3 is a schematic diagram of a gas cylinder according to an embodiment of the present utility model when slowly releasing gas;

FIG4 is a schematic diagram of a gas cylinder according to an embodiment of the present utility model when a large amount of gas is leaking;

FIG5 is a schematic diagram of the gas cylinder during storage and transportation according to an embodiment of the present utility model.

In the figure:

1. Gas cylinder;

2. Bottle mouth valve; 21. Second valve body; 22. Second valve plug; 23. Third flow channel; 24. Fourth flow channel; 25. Switch unit;

3. Directional current limiting mechanism;

4. Shell; 40. Accommodating chamber; 41. First shell; 411. Limiting flange; 42. Second shell;

5. a first elastic member;

6. One-way flow limiting valve; 61. First valve body; 611. First boss; 612. Second boss; 62. First valve plug; 621. First disk section; 622. Second disk section; 63. Second elastic member; 64. Ventilation hole;

7. Flow limiting hole;

8. First flow channel;

9. Second flow channel.

DETAILED DESCRIPTION

The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the description of the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

As shown in Figures 1 to 3, the gas source device in the utility model includes a gas cylinder 1 and a gas cylinder valve group, which is used to control the gas cylinder 1 to achieve gas filling or gas output, including a bottle mouth valve 2 and a directional flow limiting mechanism 3, which is arranged inside the gas cylinder 1 and communicated with the inside of the bottle mouth valve 2. The directional flow limiting mechanism 3 includes a shell 4 and a one-way flow limiting valve 6, the shell 4 is connected to the bottle mouth valve 2 and has a receiving chamber 40, and the receiving chamber 40 communicates with the inside of the gas cylinder 1 and the bottle mouth valve 2. That is: the inside of the bottle mouth valve 2 and the shell 4 both have a channel for gas to flow into or out of the gas cylinder 1.

The one-way flow-limiting valve 6 is arranged inside the accommodating chamber 40, and the one-way flow-limiting valve 6 includes a first valve body 61 and a first valve plug 62. A portion of the first valve body 61 is spaced apart from the inner wall of the accommodating chamber 40. The first valve body 61 has a first flow channel 8 inside it, and the gap between the first valve body 61 and the inner wall of the accommodating chamber 40 is a second flow channel 9. Both the first flow channel 8 and the second flow channel 9 can communicate with the inside of the gas cylinder 1 and the bottle mouth valve 2; the first valve plug 62 is movably arranged inside the first valve body 61, and is configured to block the first flow channel 8 under the action of the gas inside the gas cylinder 1, and to open the first flow channel 8 under the action of the gas flowing in from the bottle mouth valve 2; a limiting flow hole 7 is arranged on the first valve body 61, and the limiting flow hole 7 can connect the first flow channel 8 and the second flow channel 9; when the first valve plug 62 blocks the first flow channel 8, the gas inside the gas cylinder 1 is configured to flow to the bottle mouth valve 2 through the second flow channel 9, the limiting flow hole 7 and the first flow channel 8 in sequence.

In specific implementation, when filling gas into the gas cylinder 1, the external gas first enters the first flow channel 8 through the bottle mouth valve 2, and the gas moves from top to bottom and pushes the first valve plug 62 to move downward. At this time, the first flow channel 8 and the interior of the gas cylinder 1 remain unobstructed, and most of the gas enters the gas cylinder 1 through the first flow channel 8, and some of the gas enters the second flow channel 9 from the first flow channel 8 through the flow limiting hole 7, and then flows to the interior of the gas cylinder 1. In this way, rapid inflation of the interior of the gas cylinder 1 is achieved (as shown in Figure 1). When the gas inside the gas cylinder 1 is needed, the bottle mouth valve 2 is opened. At this time, the gas inside the gas cylinder 1 goes up and enters the first flow channel 8 and the second flow channel 9 respectively. The gas entering the first flow channel 8 will push the first valve plug 62 to move upward, and the upward first valve plug 62 will block the first flow channel 8, thereby preventing the gas from flowing out of the gas cylinder from the first flow channel 8; the gas entering the second flow channel 9 will flow into the first flow channel 8 from the second flow channel 9 through the flow limiting hole 7, and then flow out of the gas cylinder 1 through the bottle mouth valve 2. At this time, under the action of the flow limiting hole 7, the gas flow rate flowing out of the gas cylinder 1 is small, thereby achieving slow release of gas (as shown in Figure 3).

The gas cylinder valve group provided by the utility model, through the action of the directional flow limiting mechanism 3, enables each gas cylinder to realize inflation and gas use by integrating only one single-head valve, and through the one-way flow limiting valve 6 in the directional flow limiting mechanism 3, rapid inflation and slow-release gas use can be realized during the use of the gas cylinder, which is beneficial to improving the inflation efficiency and reducing the gas emission during gas use, avoiding accidents of large-scale gas leakage, and effectively reducing safety hazards.

Of course, the arrangement between the first valve body 61 and the first valve plug 62 is not limited to the one shown in the figure. In other embodiments, it can also be arranged so that the first flow channel 8 can be blocked when the first valve plug 62 moves downward, which can be determined according to actual conditions.

Furthermore, the flow limiting hole 7 can be set as a capillary channel to better achieve slow-release gas use. When the flow limiting hole 7 is a capillary channel, the gas has a large flow resistance when flowing through the flow limiting hole 7. At this time, a vacuum device can be set at the outlet of the gas cylinder 1 to vacuumize to meet the normal flow requirements when using gas. Among them, the vacuum device can be a negative pressure fan or a vacuum pump, which can be determined according to actual conditions.

As shown in FIG. 2 , in some embodiments, the housing 4 includes a first housing 41 and a second housing 42 that are fixedly connected to each other, one of the first housing 41 and the second housing 42 is sleeved on the outer circumference of the other, and the first housing 41 and the second housing 42 enclose a receiving cavity 40. Specifically, the first housing 41 is connected to the bottle mouth valve 2, and the second housing 42 can be sleeved on the outer circumference of the lower end of the first housing 41.

By setting the housing 4 as a split structure including the first housing 41 and the second housing 42, it is convenient to install and subsequently repair and replace the one-way flow limiting valve 6 inside the accommodating chamber 40. Furthermore, a limiting flange 411 can be protruded outward on the outer peripheral surface of the first housing 41. When the first housing 41 and the second housing 42 are assembled, the limiting flange 411 can play a certain indicating and positioning role for the second housing 42.

As shown in FIG4 , in some embodiments, the first valve body 61 can move in the accommodating cavity 40 along the extension direction of the first flow channel 8, and a first boss 611 is provided on the outer peripheral surface of the first valve body 61, and the first boss 611 can abut against the housing 4. When the first boss 611 abuts against the housing 4, the flow limiting hole 7 is not connected to the second flow channel 9. Specifically, the first boss 611 is located below the flow limiting hole 7, and the first boss 611 can abut against the lower end surface of the first housing 41. When the first boss 611 abuts against the lower end surface of the first housing 41, the flow limiting hole 7 is not connected to the second flow channel 9.

When a large amount of gas in the gas cylinder 1 leaks, the large amount of gas has a large impact force when flowing out of the gas cylinder 1, which can push the first valve body 61 to move upward, so that the first boss 611 abuts against the lower end surface of the first shell 41. At this time, the flow-limiting hole 7 is pushed to the inside of the first shell 41, blocking the gas from flowing out of the second flow channel 9; at the same time, a large amount of gas also causes the first valve plug 62 to move upward and block the first flow channel 8. That is, the first flow channel 8 and the second flow channel 9 are not connected to the bottle mouth valve 2, so that the gas in the gas cylinder 1 cannot be discharged from the gas cylinder 1, thereby promptly solving the problem of large-scale gas leakage, which is safer and more reliable.

As shown in FIG4 , in some embodiments, a first elastic member 5 is provided between the first valve body 61 and the housing 4, and the first elastic member 5 can generate elastic deformation so that the first valve body 61 has a tendency to move away from the abutting position between the first boss 611 and the housing 4. Specifically, one end of the first elastic member 5 can abut or be connected to the first valve body 61, and the other end can abut or be connected to the first housing 41.

Through such a configuration, when a large amount of gas leaks, the first valve body 61 is impacted by the airflow and moves upward until the first boss 611 abuts against the lower end surface of the first shell 41. At this time, the movement of the first valve body 61 causes the first elastic member 5 to be compressed and deformed. When the gas leakage accident is eliminated, the airflow returns to normal, the first elastic member 5 is reset, and the first valve body 61 is pushed to reset, and the second flow channel 9 and the flow limiting hole 7 are restored to a connected state. In this way, after the leakage accident is eliminated, the directional flow limiting mechanism 3 inside the gas cylinder 1 can automatically return to normal under the action of the first elastic member 5, and the gas cylinder 1 can be routinely quickly inflated and slowly released, which is more convenient and quick.

As shown in FIG. 4 , in some embodiments, the first boss 611 is disposed between the flow limiting hole 7 and the first valve plug 62 .

Through such a configuration, when a large-scale gas leakage accident occurs, the upward movement distance of the first valve body 61 can be shortened, so that the first boss 611 can abut against the lower end surface of the first shell 41 as soon as possible, and the second flow channel 9 can be blocked more quickly, which is beneficial to shorten the time of large-scale gas leakage and help to eliminate the leakage accident as soon as possible.

As shown in Figures 1 to 3, in some embodiments, the one-way flow limiting valve 6 also includes a second elastic member 63, one end of the second elastic member 63 is connected to or abuts against one side of the first valve plug 62, and the other end is connected to or abuts against the shell 4 or the first valve body 61. The second elastic member 63 can produce elastic deformation so that the first valve plug 62 always has a tendency to block the first flow channel 8.

With such a configuration, when the gas cylinder 1 is rapidly inflated, the first valve plug 62 moves downward and compresses the second elastic member 63. After the inflation is completed, the second elastic member 63 can be reset under the action of its own elastic force and drive the first valve plug 62 to move upward to block the first flow channel 8. In this way, when the gas cylinder 1 is used to slowly release gas in the future, there is no need to specifically apply force to the first valve plug 62 to move it upward, so that the first flow channel 8 in the gas cylinder 1 is always kept blocked while the second flow channel 9 is unobstructed, thereby enabling the gas in the gas cylinder 1 to be slowly released.

Specifically, the first elastic member 5 and the second elastic member 63 may both be configured as springs.

As shown in FIG. 2 and FIG. 3 , in some embodiments, a second boss 612 is protruded inwardly on the inner wall of the first valve body 61, and the second boss 612 extends along the circumference of the first valve body 61 and encloses a vent hole 64. The second boss 612 is located between the flow limiting hole 7 and the first valve plug 62. The first valve plug 62 includes a first disc segment 621 and a second disc segment 622 connected to each other. The first disc segment 621 can penetrate the vent hole 64 and the second disc segment 622 can abut against the second boss 612. Specifically, the cross section of the first valve plug 62 is T-shaped.

Through such a configuration, the cooperation between the second disc segment 622 and the second boss 612 plays a certain role in limiting the first valve plug 62. When the second disc segment 622 abuts against the bottom surface of the second boss 612, the first flow channel 8 is closed. In this way, the first valve plug 62 is prevented from being unable to position during the movement process and moving above the flow-limiting hole 7, thereby avoiding affecting the smooth flow of the flow-limiting hole 7 and the operating state of the second flow channel 9, which is conducive to improving the overall working reliability of the product.

As shown in FIG5 , in some embodiments, the bottle mouth valve 2 includes a second valve body 21 and a second valve plug 22, the second valve body 21 is connected to the outlet of the gas cylinder 1, the second valve body 21 is provided with a third flow channel 23 connected to the inside of the gas cylinder 1, and a fourth flow channel 24 connected to the outside, the third flow channel 23 and the fourth flow channel 24 are connected to each other, and the second valve plug 22 is movably arranged inside the second valve body 21 and can block the third flow channel 23. For example, the bottle mouth valve 2 can be an angle valve, the third flow channel 23 extends along the height direction of the gas cylinder 1, and the fourth flow channel 24 is substantially parallel to the horizontal direction.

In this way, the user can control the opening and closing of the bottle mouth valve 2 by controlling the movement of the second valve plug 22. For example, when the gas cylinder 1 is stored and transported, the second valve plug 22 moves downward to close the bottle mouth valve 2, and the interior of the gas cylinder 1 is isolated from the external environment, which is beneficial to improving the sealing of the gas cylinder 1; and when the gas cylinder 1 is used, the second valve plug 22 needs to be moved upward first so that the bottle mouth valve 2 is in an open state before operation can be performed, which is beneficial to avoiding the problem of gas leakage in the bottle caused by the bottle mouth valve 2 being in a normally open state.

As shown in Fig. 5, in some embodiments, a switch portion 25 is provided above the second valve body 21, and the switch portion 25 can drive the second valve plug 22 to move. The setting of the switch portion 25 facilitates the user to operate the bottle mouth valve 2, making the opening and closing control of the bottle mouth valve 2 more convenient.

The switch part 25 may be manually operated, such as a manual knob, or may be a pneumatic switch part, which is not specifically limited here.

Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims (10)

1. The gas cylinder valve group is characterized by comprising a bottleneck valve (2) and a directional flow limiting mechanism (3), wherein the directional flow limiting mechanism (3) is arranged in the gas cylinder (1) and is communicated with the inside of the bottleneck valve (2); the directional flow restriction (3) comprises:

A housing (4) connected to the bottleneck valve (2), the housing (4) having a receiving chamber (40), the receiving chamber (40) communicating the interior of the gas cylinder (1) with the bottleneck valve (2);

The one-way flow limiting valve (6) is arranged inside the accommodating cavity (40), the one-way flow limiting valve (6) comprises a first valve body (61) and a first valve plug (62), part of the first valve body (61) is arranged at intervals between the inner walls of the accommodating cavity (40), a first flow channel (8) is arranged inside the first valve body (61), a second flow channel (9) is arranged between the first valve body (61) and the inner walls of the accommodating cavity (40), and the first flow channel (8) and the second flow channel (9) can be communicated with the inside of the gas cylinder (1) and the bottleneck valve (2); the first valve plug (62) is movably arranged inside the first valve body (61) and is configured to be capable of blocking the first flow passage (8) under the action of gas inside the gas cylinder (1) and opening the first flow passage (8) under the action of gas flowing in from the bottleneck valve (2); a limiting hole (7) is formed in the first valve body (61), and the limiting hole (7) can be communicated with the first flow channel (8) and the second flow channel (9); when the first valve plug (62) blocks the first flow passage (8), the gas inside the gas cylinder (1) is configured to flow to the bottleneck valve (2) through the second flow passage (9), the flow limiting hole (7) and the first flow passage (8) in sequence.

2. The cylinder valve set of claim 1, wherein,

The first valve body (61) can move in the accommodating cavity (40) along the extending direction of the first flow channel (8), a first boss (611) is arranged on the outer circumferential surface of the first valve body (61), the first boss (611) can be abutted to the shell (4), and when the first boss (611) is abutted to the shell (4), the flow limiting hole (7) is not communicated with the second flow channel (9).

3. The cylinder valve set of claim 2, wherein,

A first elastic piece (5) is arranged between the first valve body (61) and the shell (4), and the first elastic piece (5) can generate elastic deformation so that the first valve body (61) has a trend of moving towards a contact position away from the first boss (611) and the shell (4).

4. The cylinder valve set of claim 2, wherein,

The first boss (611) is disposed between the flow restricting orifice (7) and the first valve plug (62).

5. The cylinder valve set of claim 1, wherein,

The one-way flow limiting valve (6) further comprises a second elastic piece (63), one end of the second elastic piece (63) is connected or abutted to one side of the first valve plug (62), the other end of the second elastic piece is connected or abutted to the shell (4) or the first valve body (61), and the second elastic piece (63) can elastically deform so that the first valve plug (62) always has a tendency of blocking the first flow channel (8).

6. The cylinder valve set of claim 1, wherein,

The utility model discloses a valve body, including first valve body (61), first valve body (61) is provided with first boss (612) on the inner wall inwards protruding, second boss (612) are followed the circumference of first valve body (61) extends and encloses and be formed with air vent (64), second boss (612) are located restricted hole (7) with between first valve plug (62), first valve plug (62) are including interconnect's first disc section (621) and second disc section (622), first disc section (621) can penetrate air vent (64) just second disc section (622) can with second boss (612) looks butt.

7. The cylinder valve set according to any one of claims 1 to 6, wherein,

The shell (4) comprises a first shell (41) and a second shell (42) which are fixedly connected with each other, one of the first shell (41) and the second shell (42) is sleeved and connected on the outer peripheral surface of the other, and the first shell (41) and the second shell (42) are enclosed to form the accommodating cavity (40).

8. The cylinder valve set according to any one of claims 1 to 6, wherein,

Bottleneck valve (2) include second valve body (21) and second valve plug (22), second valve body (21) connect in gas cylinder (1) exit, second valve body (21) inside be provided with third runner (23) that gas cylinder (1) inside are linked together, and fourth runner (24) that are linked together with the outside, third runner (23) with communicate each other between fourth runner (24), second valve plug (22) movable set up in inside and can block up of second valve body (21) third runner (23).

9. The cylinder valve set of claim 8, wherein,

A switch part (25) is arranged above the second valve body (21), and the switch part (25) can drive the second valve plug (22) to move.

10. The air source device is characterized by comprising:

a gas cylinder (1);

The cylinder valve set according to any one of claims 1 to 9, for controlling the cylinder (1) to be filled with gas or to output gas.