Control valve for fuel gas conveying

Abstract

The utility model discloses a control valve for gas delivery, which comprises a valve main body, both ends of the valve main body are fixedly connected with threaded pipes, the side ends of the threaded pipes are provided with connecting pipes, the outer parts of the connecting pipes are fixedly connected with fixing rings, the outer parts of the connecting pipes are sleeved with first threaded sleeves, and the first threaded sleeves are screwed outside the threaded pipes; extending mechanisms are fixedly connected to the ends, away from the valve body, of the two connecting pipes, each extending mechanism comprises a first connecting cylinder and a second connecting cylinder, and the side ends of the extending pipes are plugged through the plugging mechanisms, so that a large amount of natural gas in the gas main pipeline is prevented from being discharged into surrounding air, the surrounding air is prevented from being affected, and the service life of the gas main pipeline is prolonged. The safety of replacing the valve body is improved, the valve body can be conveniently installed between two pipelines at different intervals, the use practicability of the valve body is improved, the valve body can be conveniently disassembled, and the use practicability of the valve body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas valves, and more specifically, it relates to a control valve for gas transmission. Background Technique

[0002] A gas valve is a new type of safety supporting device for gas pipeline projects; it is used to cut off, connect, and regulate the gas in the pipeline, and has good control characteristics and closing and sealing performance; it is applicable to various gas medium pipelines such as city gas, liquefied petroleum gas, natural gas, and oxygen.

[0003] The existing control valve for gas transmission is installed on the main pipeline, and it controls a relatively large number of pipelines. When the control valve is damaged and needs to be replaced, a large amount of natural gas in the main pipeline will be discharged, resulting in waste of natural gas and at the same time affecting the surrounding environment, which has a certain degree of danger. The existing control valve is directly screwed onto the pipeline. Since gas pipelines are fixed, it is not convenient to disassemble the control valve. In addition, the length of the control pipeline is fixed. When the distance between the two pipelines reserved by people is relatively large, it is not convenient to adjust the length of the control valve, which is not convenient for installation and reduces its practicality in use. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the problems existing in the prior art, the utility model provides a control valve for gas transmission to solve the technical problems mentioned in the background technique.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the present utility model provides the following technical solution: A control valve for gas transmission, comprising a valve body. Both ends of the valve body are fixedly connected with threaded pipes. A connecting pipe is arranged at the side end of the threaded pipe. A fixing ring is fixedly connected to the outside of the connecting pipe. A first threaded sleeve is sleeved on the outside of the connecting pipe, and the first threaded sleeve is screwed on the outside of the threaded pipe. Both ends of the two connecting pipes away from the valve body are fixedly connected with an extension mechanism. The extension mechanism includes a first connecting cylinder and a second connecting cylinder. The first connecting cylinder is communicated with the connecting pipe. An extension pipe is hermetically and slidably arranged inside the first connecting cylinder. The extension pipe is hermetically and slidably matched with the second connecting cylinder. Both the first connecting cylinder and the second connecting cylinder are connected to the extension pipe through a pressing and sealing mechanism. A blocking mechanism is fixedly connected inside the first connecting cylinder. Since the blocking mechanism blocks the side end of the extension pipe, a large amount of natural gas inside the main gas pipeline is prevented from being discharged into the surrounding air, avoiding affecting the surrounding air, improving the safety of replacing the valve body, facilitating its installation in the middle of two pipes with different spacings, improving the practicality of its use, facilitating the disassembly of the valve body, and improving the practicality of its use.

[0008] The present utility model is further configured such that the pressing and sealing mechanism includes a conical rubber ring. Conical grooves are arranged on the inner sides of the opposite ends of the first connecting cylinder and the second connecting cylinder. The conical rubber ring is sleeved on the outside of the extension pipe, and the conical rubber ring is inserted into the corresponding conical groove. Two second threaded sleeves are sleeved on the outside of the extension pipe. External threads are arranged on the outside of both the first connecting cylinder and the second connecting cylinder. The two second threaded sleeves are respectively screwed on the outside of the first connecting cylinder and the second connecting cylinder, facilitating the hermetic and fixed connection of the extension pipe with the first connecting cylinder and the second connecting cylinder.

[0009] The present utility model is further configured such that the blocking mechanism includes a circular plate. The circular plate is located inside the first connecting cylinder. A plurality of fixing blocks are uniformly fixedly connected to the outer side wall of the circular plate. The other ends of the plurality of fixing blocks are fixedly connected to the inner side wall of the first connecting cylinder. A second sealing pad is fixedly connected to the end of the circular plate close to the extension pipe, facilitating the blocking and sealing of the side end of the extension pipe.

[0010] The present utility model is further configured such that the diameters of both the circular plate and the second sealing pad are larger than the outer diameter of the extension pipe, facilitating the second sealing pad to fully cover the side end of the extension pipe and facilitating the sealing of the side end of the extension pipe.

[0011] The present utility model is further configured such that annular grooves are arranged on the inner side walls of the first connecting cylinder and the second connecting cylinder. A sealing ring is arranged inside the annular grooves. The inner side wall of the sealing ring is in sealing contact with the outer side wall of the extension pipe, improving the sealing performance between the first connecting cylinder and the second connecting cylinder and the extension pipe.

[0012] The present utility model is further configured such that a first fixing plate is fixedly connected to the extension pipe. A slot is provided on the first fixing plate, and a bolt is inserted into the slot. A second fixing plate is fixedly connected to the first connecting cylinder. A threaded hole is provided on the second fixing plate, and the bolt is screwed into the threaded hole, which facilitates driving the extension pipe to move and making the side end of the second sealing gasket at the side end of the extension pipe abut tightly, facilitating the sealing of the extension pipe.

[0013] The present utility model is further configured such that two limiting rods are slidably provided on the second fixing plate, and the side ends of the two limiting rods are fixedly connected to the side end of the first fixing plate, which plays a role in limiting.

[0014] The present utility model is further configured such that a first sealing gasket is fixedly connected to one end of the fixing ring close to the threaded pipe, ensuring the sealing performance of the connection between the fixing ring and the threaded pipe.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present utility model provides a control valve for gas transmission, having the following beneficial effects:

[0017] 1. When the valve body fails and needs to be disassembled and replaced, loosen the pressing and sealing mechanism, then move the extension pipe to make the side end of the extension pipe abut tightly against the side end of the plugging mechanism. The side end of the extension pipe is sealed by the plugging mechanism, and then tighten the pressing and sealing mechanism to make the extension pipe be fixedly connected to the first connecting cylinder and the second connecting cylinder in a sealed manner. Then, the valve body can be disassembled and replaced. Since the plugging mechanism plugs the side end of the extension pipe, a large amount of natural gas inside the main gas pipeline is prevented from being discharged into the surrounding air, avoiding affecting the surrounding air and improving the safety of replacing the valve body.

[0018] 2. When installing the valve body, loosen the pressing and sealing mechanism, and then slide the extension pipe inside the second connecting cylinder, thereby adjusting the distance between the second connecting cylinder and the valve body and adjusting the length of the entire control valve, facilitating the corresponding adjustment of its length and facilitating its installation between two pipes with different distances, improving its practicality in use.

[0019] 3. When the valve body needs to be disassembled, unscrew the first threaded sleeve, screw the first threaded sleeve off the threaded pipe, and then move the first threaded sleeve to the connecting pipe, so that the valve can be directly pulled out between the two connecting pipes. It is also possible to separate the fixing ring from the threaded pipe by sliding the extension pipe inside the first connecting cylinder and the second connecting cylinder, thereby facilitating the disassembly of the valve body and improving its practicality in use. Description of the drawings

[0020] Figure 1Schematic front view structure of a control valve for gas transmission in the present utility model;

[0021] Figure 2 Schematic partial sectional view structure of the connection of structures such as the valve body, threaded pipe, first threaded sleeve, fixing ring, and first gasket in the present utility model;

[0022] Figure 3 Schematic sectional view structure of the connection of the first connecting cylinder, extension pipe, and plugging mechanism in the present utility model;

[0023] Figure 4 Schematic partial sectional view structure of the connection of the first connecting cylinder, extension pipe, and pressing and sealing mechanism in the present utility model;

[0024] Figure 5 Schematic view of the connection of structures such as the first fixing plate, second fixing plate, and bolt in the present utility model.

[0025] In the figure: 1. Valve body; 2. Threaded pipe; 3. Connecting pipe; 4. Fixing ring; 5. First threaded sleeve; 6. First connecting cylinder; 7. Second connecting cylinder; 8. Extension pipe; 9. Conical rubber ring; 10. Conical groove; 11. Second threaded sleeve; 12. External thread; 13. Circular plate; 14. Fixed block; 15. Second gasket; 16. Annular groove; 17. Sealing ring; 18. First fixing plate; 19. Slot; 20. Bolt; 21. Second fixing plate; 22. Threaded hole; 23. Limiting rod; 24. First gasket. Detailed implementation manners

[0026] It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] It should be pointed out that unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0028] In the present utility model, unless otherwise stated, the orientations such as "upper, lower" are usually in the directions shown in the drawings, or in the vertical, perpendicular, or gravitational directions; similarly, for ease of understanding and description, "left, right" are usually in the left and right shown in the drawings; "inside, outside" refer to the inside and outside relative to the contours of each component itself, but the above orientation terms are not used to limit the present utility model.

[0029] Please refer to Figures 1-5, A control valve for gas transmission, comprising a valve body 1. Both ends of the valve body 1 are fixedly connected with threaded pipes 2. A connecting pipe 3 is arranged at the side end of the threaded pipe 2. A fixing ring 4 is fixedly connected to the outside of the connecting pipe 3. A first gasket 24 is fixedly connected to one end of the fixing ring 4 close to the threaded pipe 2 to ensure the sealing performance of the connection between the fixing ring 4 and the threaded pipe 2. A first threaded sleeve 5 is sleeved on the outside of the connecting pipe 3, and the first threaded sleeve 5 is screwed on the outside of the threaded pipe 2. Extension mechanisms are fixedly connected to both ends of the two connecting pipes 3 away from the valve body 1. The extension mechanism includes a first connecting cylinder 6 and a second connecting cylinder 7. The first connecting cylinder 6 is communicated with the connecting pipe 3. An extension pipe 8 is hermetically and slidably arranged inside the first connecting cylinder 6. The extension pipe 8 is hermetically and slidably matched with the second connecting cylinder 7. Annular grooves 16 are arranged on the inner side walls of the first connecting cylinder 6 and the second connecting cylinder 7. A sealing ring 17 is arranged inside the annular groove 16. The inner side wall of the sealing ring 17 is in sealing contact with the outer side wall of the extension pipe 8 to improve the sealing performance between the first connecting cylinder 6 and the second connecting cylinder 7 and the extension pipe 8. Both the first connecting cylinder 6 and the second connecting cylinder 7 are connected to the extension pipe 8 through a pressing and sealing mechanism. A plugging mechanism is fixedly connected inside the first connecting cylinder 6.

[0030] In this embodiment, when the valve body 1 fails and needs to be disassembled and replaced, loosen the pressing and sealing mechanism, then move the extension pipe 8 so that the side end of the extension pipe 8 abuts against the side end of the plugging mechanism. The side end of the extension pipe 8 is sealed by the plugging mechanism. Then tighten the pressing and sealing mechanism to fixedly connect the extension pipe 8 with the first connecting cylinder 6 and the second connecting cylinder 7 in a sealed manner. Then the valve body 1 can be disassembled and replaced. Since the side end of the extension pipe 8 is plugged by the plugging mechanism, a large amount of natural gas inside the main gas pipeline is prevented from being discharged into the surrounding air, avoiding affecting the surrounding air and improving the safety of replacing the valve body 1. When installing the valve body 1, loosen the pressing and sealing mechanism, then slide the extension pipe 8 inside the second connecting cylinder 7, thereby adjusting the distance between the second connecting cylinder 7 and the valve body 1 and adjusting the length of the entire control valve, facilitating the corresponding adjustment of its length and facilitating its installation between two pipes with different distances, improving its practicality in use. When the valve body 1 needs to be disassembled, unscrew the first threaded sleeve 5, unscrew the first threaded sleeve 5 from the threaded pipe 2, and then move the first threaded sleeve 5 onto the connecting pipe 3, so that the valve can be directly pulled out between the two connecting pipes 3. It is also possible to separate the fixing ring 4 from the threaded pipe 2 by sliding the extension pipe 8 inside the first connecting cylinder 6 and the second connecting cylinder 7, thereby facilitating the disassembly of the valve body 1 and improving its practicality in use.

[0031] Please refer to Figure 3 and Figure 4, the pressing and sealing mechanism includes a conical rubber ring 9. Conical grooves 10 are provided on the inner sides of the opposite ends of the first connecting cylinder 6 and the second connecting cylinder 7. The conical rubber ring 9 is sleeved outside the extension pipe 8, and the conical rubber ring 9 is inserted into the corresponding conical groove 10. Two second threaded sleeves 11 are sleeved outside the extension pipe 8. External threads 12 are provided on the outside of the first connecting cylinder 6 and the second connecting cylinder 7. The two second threaded sleeves 11 are respectively screwed on the outside of the first connecting cylinder 6 and the second connecting cylinder 7, facilitating the sealed and fixed connection of the extension pipe 8 with the first connecting cylinder 6 and the second connecting cylinder 7.

[0032] In this embodiment, the second threaded sleeve 11 is screwed on the first connecting cylinder 6 or the second connecting cylinder 7. By pushing the conical rubber ring 9 to move through the second threaded sleeve 11, the conical rubber ring 9 is inserted into the conical groove 10. When the outer side wall of the conical rubber ring 9 contacts the side end of the conical groove 10, the conical rubber ring 9 is extruded, so that the conical rubber ring 9 is pressed tightly outside the extension pipe 8, thereby fixing the extension pipe 8, and at the same time enabling the extension pipe 8 to be hermetically connected with the first connecting cylinder 6 and the second connecting cylinder 7.

[0033] Please refer to Figure 3 , the plugging mechanism includes a circular plate 13. The circular plate 13 is located inside the first connecting cylinder 6. A plurality of fixing blocks 14 are uniformly and fixedly connected to the outer side wall of the circular plate 13. The other ends of the plurality of fixing blocks 14 are fixedly connected to the inner side wall of the first connecting cylinder 6. A second sealing pad 15 is fixedly connected to one end of the circular plate 13 close to the extension pipe 8. The diameters of the circular plate 13 and the second sealing pad 15 are both larger than the outer diameter of the extension pipe 8, facilitating the second sealing pad 15 to completely cover the side end of the extension pipe 8 and facilitating the sealing of the side end of the extension pipe 8. A first fixing plate 18 is fixedly connected to the extension pipe 8. A slot 19 is provided on the first fixing plate 18. A bolt 20 is inserted into the slot 19. A second fixing plate 21 is fixedly connected to the first connecting cylinder 6. A threaded hole 22 is provided on the second fixing plate 21. The bolt 20 is screwed into the threaded hole 22. Two limiting rods 23 are slidably arranged on the second fixing plate 21. The side ends of the two limiting rods 23 are fixedly connected to the side end of the first fixing plate 18, playing a role in limiting.

[0034] In this embodiment, when the bolt 20 is rotated clockwise, the bolt 20 moves towards the side close to the valve body 1 relative to the second fixing plate 21. The bolt 20 presses the first fixing plate 18 and drives the first fixing plate 18 and the extension pipe 8 into the first connecting cylinder 6, and makes the side end of the extension pipe 8 abut against the side end of the second sealing pad 15. The side end of the extension pipe 8 is sealed by the second sealing pad 15.

[0035] In summary, when the overall equipment is in use:

[0036] When the valve body 1 needs to be installed between two gas pipelines, firstly, the two second connecting tubes 7 are connected to the two gas pipelines respectively, and then the two extension tubes 8 are respectively inserted into the inside of the two second connecting tubes 7, and then the extension tube 8 is pulled to slide inside the first connecting tube 6, and a certain distance is maintained between the extension tube 8 and the second sealing gasket 15, and then a second threaded sleeve 11 is screwed on the outside of the first connecting tube 6, and the conical rubber ring 9 is clamped inside the conical groove 10, so that the first connecting tube 6 and the extension tube 8 are fixedly connected, and then the valve body 1 is placed in the middle of the two connecting tubes 3, and the connecting tube 3, the first connecting tube 6 and the extension tube 8 are pulled to move, and the second sealing gasket 15 is kept at a certain distance, and then a second threaded sleeve 11 is screwed on the outside of the first connecting tube 6, and the conical rubber ring 9 is clamped inside the conical groove 10, so that the first connecting tube 6 and the extension tube 8 are fixedly connected, and then the valve body 1 is placed in the middle of the two connecting tubes 3, and the connecting tube 3, the first connecting tube 6 and the extension tube 8 are pulled to move, and the second sealing gasket 15 is kept at a certain distance, and then the ... The connecting pipe 3 and the threaded pipe 2 sandwich the first sealing gasket 24 in the middle, and then the first threaded sleeve 5 is screwed on the outside of the corresponding threaded pipe 2, and the fixing ring 4 is squeezed by the first threaded sleeve 5, so that the fixing ring 4 and the threaded pipe 2 press the first sealing gasket 24, and the sealing of the connection between the fixing ring 4 and the threaded pipe 2 is ensured by the first sealing gasket 24. After the valve body 1 is connected to the two connecting pipes 3, the second threaded sleeve 11 is screwed on the second connecting tube 7, and the conical rubber ring 9 is clamped inside the conical groove 10 on the second connecting tube 7, so that the extension pipe 8 is sealed and fixedly connected with the second connecting tube 7, so that the valve body 1 is installed between the two gas pipelines.

[0037] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A control valve for gas transmission, comprising a valve body (1), characterized in that: Both ends of the valve body (1) are fixedly connected to threaded tubes (2), the side ends of the threaded tubes (2) are provided with connecting tubes (3), the outside of the connecting tubes (3) is fixedly connected to a fixing ring (4), the outside of the connecting tubes (3) is provided with a first threaded sleeve (5), the first threaded sleeve (5) is screwed onto the outside of the threaded tube (2), the ends of the two connecting tubes (3) away from the valve body (1) are fixedly connected to an extension mechanism, the extension mechanism comprises a first connecting tube (6) and a second connecting tube (7), the first connecting tube (6) is connected to the connecting tube (3), the interior of the first connecting tube (6) is sealingly slidably provided with an extension tube (8), the extension tube (8) is sealingly slidably matched with the second connecting tube (7), the first connecting tube (6) and the second connecting tube (7) are both connected to the extension tube (8) through a compression sealing mechanism, and the interior of the first connecting tube (6) is fixedly connected to a blocking mechanism.

2. A gas delivery control valve according to claim 1, characterized in that: The compression sealing mechanism comprises a conical rubber ring (9), and conical grooves (10) are provided on the inner sides of opposite ends of the first connecting tube (6) and the second connecting tube (7). The conical rubber ring (9) is sleeved on the outside of the extension tube (8), and the conical rubber ring (9) is inserted into the inside of the corresponding conical groove (10). The outside of the extension tube (8) is sleeved with two second threaded sleeves (11), and the outside of the first connecting tube (6) and the second connecting tube (7) are provided with external threads (12). The two second threaded sleeves (11) are respectively screwed on the outside of the first connecting tube (6) and the second connecting tube (7).

3. A gas delivery control valve according to claim 1, characterized in that: The blocking mechanism comprises a circular plate (13), the circular plate (13) being located inside the first connecting tube (6), a plurality of fixing blocks (14) being evenly fixedly connected to the outer wall of the circular plate (13), the other ends of the plurality of fixing blocks (14) being fixedly connected to the inner wall of the first connecting tube (6), and a second sealing gasket (15) being fixedly connected to one end of the circular plate (13) close to the extension tube (8).

4. A gas delivery control valve according to claim 3, characterized in that: The diameters of the circular plate (13) and the second sealing gasket (15) are both larger than the outer diameter of the extension tube (8).

5. A gas delivery control valve according to claim 1, characterized in that: An annular groove (16) is provided on the inner side walls of the first connecting tube (6) and the second connecting tube (7), a sealing ring (17) is provided inside the annular groove (16), and the inner side wall of the sealing ring (17) is in sealing contact with the outer side wall of the extension tube (8).

6. A gas transmission control valve according to claim 1, characterized in that: The extension tube (8) is fixedly connected to a first fixing plate (18), the first fixing plate (18) is provided with a slot (19), a bolt (20) is inserted into the slot (19), and the first connecting tube (6) is fixedly connected to a second fixing plate (21), the second fixing plate (21) is provided with a threaded hole (22), and the bolt (20) is screwed into the threaded hole (22).

7. A gas delivery control valve according to claim 6, characterized in that: The second fixing plate (21) is slidably provided with two limiting rods (23), and the side ends of the two limiting rods (23) are fixedly connected to the side ends of the first fixing plate (18).

8. A gas delivery control valve according to claim 1, characterized in that: One end of the fixing ring (4) close to the threaded tube (2) is fixedly connected to a first sealing gasket (24).

Images