Gas stop valve with primary pressure reduction function

Abstract

The utility model discloses a gas stop valve with a primary pressure reduction function. The gas stop valve comprises a valve body, a pressure reduction executing mechanism and a stop executing mechanism. A ventilation channel is formed in the valve body, a pressure reduction executing mechanism and a cut-off executing mechanism are installed on the valve body, the pressure reduction executing mechanism can be communicated with the ventilation channel, and the cut-off executing mechanism is located on the side, close to the air inlet end of the ventilation channel, of the pressure reduction executing mechanism and used for cutting off the ventilation channel. The gas stop valve with the primary pressure reduction function solves the problem that a stop pressure reduction position cannot be closed in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas stop valve, concretely relates to a primary pressure reduction type gas stop valve. BACKGROUND

[0002] The stop valve needs to be used in the gas pipeline management, and the stop valve is used to close the gas pipeline under certain conditions.

[0003] A high-pressure gas pressure reducing valve is disclosed in a Chinese patent with the application number CN202323474730.9, which comprises a valve body, one end of which is provided with an air inlet, and the other end is provided with an air outlet; the valve body is provided with a containing cavity for connecting the air inlet and the air outlet; a valve core is movably arranged in the containing cavity, and the connection and disconnection of the air inlet and the air outlet are changed by the movement of the valve core; the outer side of the valve core forms a lower cavity, a middle cavity and an upper cavity which are isolated from each other; the valve core is provided with an adjusting air channel; the upper cavity is connected with the air outlet through the adjusting air channel and the lower cavity in sequence; the middle cavity is connected with the outside of the valve body; and an elastic adjusting member is arranged in the middle cavity to provide auxiliary control force for the movement of the valve core in the containing cavity. Although the high-pressure gas pressure reducing valve can realize the pressure reduction function, it still has the following shortcomings: the pressure reduction place cannot be closed, which cannot meet the needs of the pressure reduction place. SUMMARY

[0004] The utility model provides a primary pressure reduction type gas stop valve to solve the problem that the pressure reduction place cannot be closed in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The utility model discloses a primary pressure reduction type gas stop valve, which comprises a valve body, a pressure reduction actuating mechanism and a stop actuating mechanism; the valve body is provided with an air passage, and the pressure reduction actuating mechanism and the stop actuating mechanism are installed on the valve body; the pressure reduction actuating mechanism can communicate with the air passage; the stop actuating mechanism is located on the side of the pressure reduction actuating mechanism close to the air inlet end of the air passage; and the stop actuating mechanism is used to cut off the air passage.

[0007] Preferably, the pressure reduction actuating mechanism can move in the gas flow direction of the air passage relative to the valve body; the pressure reduction actuating mechanism is provided with an elastic member; and the elastic member is used to keep the pressure reduction actuating mechanism in the state of closing the air outlet end of the air passage.

[0008] Preferably, the pressure reduction actuating mechanism is installed on the valve body by an end head; and the end head does not block the discharge of gas by the pressure reduction actuating mechanism.

[0009] Preferably, the pressure-reducing actuator includes: a pressure-reducing part, a first sealing and isolating part, and a second sealing and isolating part. A protruding ring protrudes from the inner wall of the valve body, and the central hole of the protruding ring is the outlet end of the venting channel. A limiting step is formed on the inner wall of the end head, and the pressure-reducing part can move between the limiting step and the protruding ring. The pressure-reducing part is equipped with a first sealing and isolating part and a second sealing and isolating part that are spaced apart from each other. The first sealing and isolating part is in close contact with the inner wall of the end head, and a first pressure relief chamber is formed between the first sealing and isolating part and the limiting step. The second sealing and isolating part is in close contact with the inner wall of the valve body, and a venting chamber is formed between the second sealing and isolating part and the protruding ring. A connecting chamber is provided in the pressure-reducing part, the inlet of which is connected to the second pressure relief chamber, and the outlet of which is connected to the first pressure relief chamber. An exhaust hole is provided on the end head, and the exhaust hole is connected to the first pressure relief chamber. A venting groove is provided on the end head and / or the valve body, and the venting groove connects the venting chamber to the outside atmosphere.

[0010] Preferably, the end head is detachably connected to the valve body.

[0011] Preferably, the end head is threaded to the valve body.

[0012] Preferably, the end head and the valve body are partially threaded, and a vent groove is formed next to the threaded connection.

[0013] Preferably, an isolation section is formed on the inner wall of the ventilation channel. The isolation section is located on the side of the protruding ring near the air inlet end of the ventilation channel. The isolation section has an inlet hole. A cut-off channel is formed between the isolation section and the protruding ring. The cut-off channel is used for the cut-off actuator to open and close.

[0014] Preferably, the cut-off channel includes: a first cylindrical hole, a second cylindrical hole, and a conical hole. The first cylindrical hole is located on the side of the second cylindrical hole closer to the cut-off actuator. The diameter of the first cylindrical hole is larger than the diameter of the second cylindrical hole. The first cylindrical hole is connected to the second cylindrical hole through the conical hole. The first cylindrical hole is connected to the center hole of the protruding ring. The second cylindrical hole is connected to the inlet hole.

[0015] Preferably, a plug is installed on the pressure reducing part to seal the center hole of the protruding ring. The connecting cavity includes an inner hole and a side wall hole. One end of the inner hole is connected to the first pressure relief cavity. The side wall of the pressure reducing part is provided with a side wall hole, and the other end of the inner hole is connected to the second pressure relief cavity through the side wall hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In this application, a shut-off mechanism is set in front of the pressure-reducing actuator, which enables the pressure-reducing actuator to be shut off as needed, and the pressure-reducing actuator to not operate when pressure reduction is not required. This makes the function more user-friendly, meets different needs, and improves market competitiveness.

[0018] Other advantages, objects, and features of the present application will become apparent from the following specification, claims, and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a structure diagram of the primary pressure relief type gas stop valve.

[0020] Fig. 2 It is a sectional view of the primary pressure relief type gas stop valve and the air passage after being cut open in the direction parallel to the air inlet direction.

[0021] Fig. 3 It is a sectional view of the primary pressure relief type gas stop valve and the air passage after being cut open in the direction perpendicular to the air inlet direction.

[0022] Reference signs: valve body 1, protruding ring 10, air passage 11, second pressure relief cavity 12, interval isolation part 13, stop channel 14, first cylindrical hole 141, second cylindrical hole 142, conical hole 143, pressure relief actuator 2, pressure relief part 20, inner hole 201, side wall hole 202, first sealing isolation part 21, second sealing isolation part 22, elastic member 23, plug 24, stop actuator 3, end head part 4, first pressure relief cavity 40, exhaust hole 41, air passage 42. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, purposes and effects of the present application more clear and easy to understand, the present application will be further described below in combination with the drawings and specific embodiments:

[0024] As shown in Figs. 1 to 3 The present application discloses a primary pressure relief type gas stop valve, which comprises a valve body 1, a pressure relief actuator 2 and a stop actuator 3.

[0025] The pressure relief actuator 2 can move relative to the valve body 1 in the gas flow direction of the air passage 11, and the pressure relief actuator 2 is provided with an elastic member 23 for keeping the pressure relief actuator in a closed state of the air outlet end of the air passage 11.

[0026] The pressure reducing actuator 2 is mounted on the valve body 1 by the end head 4, and the end head 4 does not block the discharge of gas from the pressure reducing actuator 2. After the end head 4 is mounted, it does not block the discharge of gas and does not block the movement of the pressure reducing actuator 2.

[0027] The pressure reducing actuator 2 includes a pressure reducing part 20, a first sealing isolation part 21, and a second sealing isolation part 22. The valve body 1 has a protruding ring 10 protruding from the inner wall, and the center hole of the protruding ring 10 is the gas outlet end of the air passage 11. The inner wall of the end head 4 forms a limiting step, and the limiting step and the protruding ring 10 provide a space for the movement of the pressure reducing part 20. The first sealing isolation part 21 and the second sealing isolation part 22 are mounted on the pressure reducing part 20 and are spaced apart from each other. The first sealing isolation part 21 is in close contact with the inner wall of the end head 4, and the first sealing isolation part 21 and the limiting step form a first pressure relief chamber 40. The second sealing isolation part 22 is in close contact with the inner wall of the valve body 1, and the second sealing isolation part 22 and the first sealing isolation part 21 form an air passage. The second sealing isolation part 22 and the protruding ring 10 form a second pressure relief chamber 12. A communication chamber is formed in the pressure reducing part 20, the inlet of the communication chamber is communicated with the second pressure relief chamber 12, and the outlet of the communication chamber is communicated with the first pressure relief chamber 40. An exhaust hole 41 is formed in the end head 4, and the exhaust hole 41 is communicated with the first pressure relief chamber 40. An air passage 42 is formed in the end head 4 and / or the valve body 1, and the air passage 42 communicates the air passage with the atmosphere.

[0028] The end head 4 and the valve body 1 are detachably connected. It is convenient to install the pressure reducing actuator 2 on the valve body 1.

[0029] The end head 4 and the valve body 1 are threadedly connected. The detachable connection of the end head 4 and the valve body 1 is realized.

[0030] The end head 4 and the valve body 1 are partially threadedly connected, and the air passage 42 is formed beside the thread connection.

[0031] A separation part is formed in the inner wall of the air passage 11, and the separation part is located on the side of the protruding ring 10 close to the gas inlet end of the air passage 11. The separation part is provided with an inlet hole, and the separation part and the protruding ring 10 form a cutoff passage 14 for the opening and closing of the cutoff actuator 3.

[0032] The cutoff passage 14 includes a first cylindrical hole 141, a second cylindrical hole 142, and a conical hole 143. The first cylindrical hole 141 is located on the side of the second cylindrical hole 142 close to the cutoff actuator 3. The diameter of the first cylindrical hole 141 is greater than the diameter of the second cylindrical hole 142. The first cylindrical hole 141 is communicated with the second cylindrical hole 142 through the conical hole 143. The first cylindrical hole 141 is communicated with the center hole of the protruding ring 10, and the second cylindrical hole 142 is communicated with the inlet hole.

[0033] The pressure relief part 20 is provided with a plug 24 for plugging the central hole of the convex ring 10, and the communication cavity comprises an inner hole 201 and a side wall hole 202, the inner hole 201 is communicated with the first pressure relief cavity 40 at one end, the side wall hole 202 is arranged on the side wall of the pressure relief part 20, and the other end of the inner hole 201 is communicated with the second pressure relief cavity 12 through the side wall hole 202.

[0034] In the application, firstly, in order to make the pressure relief actuator 2 and the cut-off actuator 3 compact together, the pressure relief actuator 2 is designed to move in the direction parallel to the gas flow direction of the ventilation passage 11, the cut-off actuator 3 is designed to move in the direction vertical to the gas flow direction of the ventilation passage 11, the pressure relief actuator 2 opens and closes the inner hole 201 of the convex ring 10, and the cut-off actuator 3 opens and closes the intermediate position between the isolation part and the convex ring 10, so that when the valve body 1 is generated, the upper and lower demolding and the one-time side core pulling can be realized, the valve body 1 with the convex ring 10, the isolation part, the ventilation passage 11 and the cut-off passage 14 can be formed, and the machining steps of the valve body 1 are reduced; then, in order to smoothly release the pressure, the first sealing isolation part 21 and the second sealing isolation part 22 are designed to isolate the first pressure relief cavity 40 and the second pressure relief cavity 12 from the ventilation cavity communicated with the outside atmosphere, the first sealing isolation part 21 and the second sealing isolation part 22 are made of elastic material, so that the pressure relief part 20 can move between the valve body 1 and the end head part 4, and the gas can be released through the first pressure relief cavity 40 and isolated from the outside atmosphere; then, in order to facilitate the installation of the pressure relief actuator 2, the valve body 1 and the end head part 4 are designed to be detachably connected; then, in order to realize the detachable connection between the valve body 1 and the end head part 4; then, in order to reduce the cost, the position of the valve body 1 connected with the end head part 4 is designed as a non-cylindrical structure, and a part is missing, so that a part can be missing in the mold, the machining steps of the valve body 1 are reduced, in order to realize the threaded connection, a threaded groove can be machined on the valve body 1, the machining steps of the valve body 1 are reduced, and the ventilation groove 42 can be formed after the connection with the end head part 4, so as to communicate the ventilation cavity with the outside atmosphere, and avoid affecting the movement of the pressure relief part 20 due to the disconnection of the ventilation cavity with the outside atmosphere.

[0035] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the application and are not limited, although the application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the application, and all should be covered in the scope of the claims of the application.

Claims

1. Primary pressure reducing gas stop valve, characterized in that, The utility model relates to a valve body (1), pressure relief actuator (2) and cut-off actuator (3) are included. The valve body (1) is provided with a vent passage (11), and the pressure relief actuator (2) and the cut-off actuator (3) are installed on the valve body (1), the pressure relief actuator (2) can communicate with the vent passage (11), the cut-off actuator (3) is located on the side of the pressure relief actuator (2) close to the air inlet end of the vent passage (11), and the cut-off actuator (3) is used to cut off the vent passage (11). The pressure relief actuator (2) can move in the gas flow direction of the vent passage (11) relative to the valve body (1), and the pressure relief actuator (2) is provided with an elastic element (23) inside, and the elastic element (23) is used to keep the pressure relief actuator in the state of closing the air outlet end of the vent passage (11).

2. The primary pressure reducing gas stop valve according to claim 1, characterized by The pressure relief actuator (2) is installed on the valve body (1) by the end head (4), and the end head (4) does not block the release of gas by the pressure relief actuator (2).

3. The primary pressure reducing gas stop valve according to claim 2, characterized by The pressure relief actuator (2) includes a pressure relief part (20), a first sealing isolation part (21) and a second sealing isolation part (22), the inner wall of the valve body (1) is provided with a protruding ring (10), the center hole of the protruding ring (10) is the air outlet end of the vent passage (11), the inner wall of the end head (4) forms a limiting step, the limiting step and the protruding ring (10) are used to move the pressure relief part (20), the first sealing isolation part (21) and the second sealing isolation part (22) are installed on the pressure relief part (20) and are spaced from each other, the first sealing isolation part (21) is tightly attached to the inner wall of the end head (4), the first sealing isolation part (21) and the limiting step form a first pressure relief cavity (40), the second sealing isolation part (22) is tightly attached to the inner wall of the valve body (1), the second sealing isolation part (22) and the first sealing isolation part (21) form a vent cavity, the second sealing isolation part (22) and the protruding ring (10) form a second pressure relief cavity (12), a communication cavity is formed in the pressure relief part (20), the inlet of the communication cavity is communicated with the second pressure relief cavity (12), the outlet of the communication cavity is communicated with the first pressure relief cavity (40), an exhaust hole (41) is formed in the end head (4) and is communicated with the first pressure relief cavity (40), and a vent groove (42) is formed in the end head (4) and / or the valve body (1) and is communicated with the vent cavity and the atmosphere.

4. The primary pressure reducing gas stop valve according to claim 3, characterized by The end head (4) and the valve body (1) are detachably connected.

5. The primary pressure reducing gas stop valve according to claim 4, characterized in that, The end head (4) and the valve body (1) are threadedly connected.

6. The primary pressure reducing gas stop valve according to claim 5, characterized by The end head (4) and the valve body (1) are partially threadedly connected, and a vent groove (42) is formed beside the threaded connection.

7. The primary pressure reducing gas stop valve according to claim 6, characterized in that A separation part (13) is formed in the inner wall of the vent passage (11), the separation part is located on the side of the protruding ring (10) close to the air inlet end of the vent passage (11), the separation part is provided with an inlet hole, the separation part and the protruding ring (10) form a cut-off passage (14), and the cut-off passage (14) is used for opening and closing by the cut-off actuator (3).

8. A primary pressure reducing gas stop valve according to any one of claims 4 to 7, characterized in that ​ 9. The primary pressure reducing gas stop valve according to claim 8, characterized in that The cutoff channel (14) comprises a first cylindrical hole (141), a second cylindrical hole (142) and a conical hole (143), the first cylindrical hole (141) is located on the side of the second cylindrical hole (142) close to the cutoff actuator (3), the diameter of the first cylindrical hole (141) is larger than that of the second cylindrical hole (142), the first cylindrical hole (141) is communicated with the second cylindrical hole (142) through the conical hole (143), the first cylindrical hole (141) is communicated with the center hole of the convex ring (10), and the second cylindrical hole (142) is communicated with the inlet hole.

10. A primary pressure reducing gas stop valve according to any one of claims 4 to 7, characterized in that A plug (24) is mounted on the decompression part (20) and is used to block the center hole of the convex ring (10), and the communication cavity comprises an inner hole (201) and a side wall hole (202), one end of the inner hole (201) is communicated with the first pressure relief cavity (40), the side wall of the decompression part (20) is provided with the side wall hole (202), and the other end of the inner hole (201) is communicated with the second pressure relief cavity (12) through the side wall hole (202).

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