Gas safety flow limiting valve for pipes

Abstract

This utility model discloses a gas safety flow limiting valve for pipelines, including a gas pipe and a flow limiting pipe. One end of the gas pipe is connected to the flow limiting pipe via a flange. An annular connecting plate is provided between the inner walls of the flow limiting pipe. Side blocks are provided between the valve seat and the top and bottom midpoints of the flow limiting pipe near the gas pipe end. A threaded rod is provided at the midpoint of the side block away from the gas pipe. Threaded blocks are threadedly connected to the threaded rods, and an annular cover is provided between the outer sides of the threaded blocks. A rotating rod is provided in the middle of the gas pipe, and rotating plates are evenly distributed at the midpoint of the outer side of the rotating rod. A magnetic coupler is provided at the top of the rotating rod. This utility model prevents excessive gas outflow by moving the annular cover, improving safety. Furthermore, in the event of gas overpressure, the rotation speed can be converted into a magnetic signal for transmission, preventing further gas leakage and safety hazards caused by overpressure.

Description

Technical Field

[0001] This utility model relates to the field of gas valve technology, specifically a gas safety flow limiting valve for pipelines. Background Technology

[0002] Natural gas is a clean, efficient and widely used energy source, and is widely used in residential life, industrial production and commercial activities. During the transmission of natural gas through pipelines, gas flow control valves are required to ensure the safety and stability of the transmission and prevent accidents such as gas leakage or overpressure.

[0003] In the existing technology, general gas flow restrictors cannot automatically adjust according to changes in gas flow and pressure during use, which reduces their safety. Furthermore, they cannot respond quickly in case of overpressure to close the external safety valve and cut off the gas transmission. Utility Model Content

[0004] The purpose of this utility model is to provide a gas safety flow limiting valve for pipelines to solve the problems mentioned in the background art, which make it inconvenient to safely limit flow and provide warning shut-off.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gas safety flow limiting valve for pipelines, comprising a gas pipe and a flow limiting pipe. One end of the gas pipe is connected to the flow limiting pipe via a flange, and a valve seat is provided at the end of the gas pipe near the flow limiting pipe. An annular connecting plate is provided between the inner walls of the flow limiting pipe, and a connecting frame is provided in the middle of the annular connecting plate. Through holes are evenly distributed near the edges of the annular connecting plate. Side blocks are provided between the valve seat and the top and bottom of the flow limiting pipe near the gas pipe end. A threaded rod is provided at the middle of the side block away from the gas pipe. Threaded blocks are threadedly connected to the threaded rods. An annular cover is provided between the sides. A rotating rod is located in the middle of the gas pipe, and rotating plates are evenly distributed in the middle of the outer side of the rotating rod. A magnetic coupler is provided at the top of the rotating rod, which causes the extrusion block to move the toothed plate. The toothed plate then drives the gear meshing with it to rotate on the optical axis of the threaded rod. This causes the threaded rod to move the annular cover on the outer side of the threaded block synchronously. The movement of the annular cover can limit the flow of gas and prevent excessive gas outflow, thus improving safety. In case of gas overpressure, the magnetic coupler can convert the rotation speed into a magnetic signal, which can then control the external safety valve to quickly cut off the gas flow, preventing further gas leakage and safety hazards caused by overpressure.

[0006] As a further technical solution of this utility model, a spring is provided in the connecting frame, and a connecting rod is provided at the other end of the spring. A valve disc is provided at the other end of the connecting rod, and the valve disc is in contact with the valve seat. When the gas pushes the valve disc, the spring is compressed, causing the connecting rod to drive the valve disc to move, thereby realizing the control of the gas flow.

[0007] As a further technical solution of this utility model, each of the side blocks is provided with an extrusion groove at the upper part, and each of the side blocks is provided with a spring 2 at the middle position of the upper part of the extrusion groove, and each of the spring 2 is provided with an extrusion block at the other end, so that the extrusion block is extruded by the gas, which can cause the spring 2 to deform under force, and can drive the extrusion block to move in the extrusion groove.

[0008] As a further technical solution of this utility model, the bottom of the inner side of the extrusion block is provided with a toothed plate, and the middle position of the bottom side block of the toothed plate is provided with a gear groove, so that when the extrusion block is subjected to force and moves, it can drive the toothed plate to move together.

[0009] As a further technical solution of this utility model, one end of the threaded rod extends into the gear groove through a bearing, and the threaded rod in the gear groove is set as a smooth shaft section, so that one end of the threaded rod extends into the gear groove and the threaded rod section in the gear groove is in the shape of a smooth shaft.

[0010] As a further technical solution of this utility model, gears are provided on the optical axis section of the threaded rod in the gear groove, and the gears mesh with the toothed plate through the gear groove, so that when the toothed plate moves, it drives the gears meshing with it to rotate, so that the gears rotate on the optical axis section of the threaded rod.

[0011] As a further technical solution of this utility model, both sides of the toothed plate are provided with slide bars, and each of the corresponding extrusion grooves of the slide bars is provided with a slide groove. The slide grooves are slidably connected to the corresponding slide bars, so that when the toothed plate moves, it can drive the slide bars to move in the slide grooves, making its movement more stable and preventing it from deviating.

[0012] As a further technical solution of this utility model, slots are evenly provided on the annular connecting plates at the top and bottom of the through hole, and inserts are evenly provided on the slots on the annular connecting plates at the positions corresponding to the edges of the annular cover. The inserts on the edges of the annular cover are inserted into the slots of the annular connecting plates, so that after the annular cover and the annular connecting plates are fitted together, the inserts can be inserted into the slots, making the connection more stable.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] By pushing the extrusion block inside the side block inward with gas, the second spring is deformed by the extrusion block. At the same time, the extrusion block drives the toothed plate to move, which in turn drives the gear meshing with it to rotate on the optical shaft section of the threaded rod. This causes the threaded rod to drive the annular cover outside the threaded block to move synchronously. The movement of the annular cover can reduce the flow area of ​​the flow-limiting tube, thereby limiting the flow of gas and preventing excessive gas outflow, thus improving safety.

[0015] When the gas is overpressurized, it drives the rotating vane and rotating rod to rotate. The rotating rod transmits the rotation speed to the magnetic coupler, which converts the rotation speed into a magnetic signal. The magnetic signal then controls the external safety valve to quickly cut off the gas flow, preventing further gas leakage and safety hazards caused by overpressure. Attached Figure Description

[0016] Figure 1 This is a side sectional view of the present invention.

[0017] Figure 2 This is a schematic diagram of the main sectional view of the side block, extrusion block, and toothed plate of this utility model;

[0018] Figure 3 This is a side sectional view of the side block and the sliding groove of this utility model.

[0019] Figure 4 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0020] Figure 5 For the present utility model Figure 1 Enlarged structural diagram at point B;

[0021] In the diagram: 1. Gas pipe; 2. Flow restrictor; 3. Magnetic coupler; 4. Rotating plate; 5. Rotating rod; 6. Valve disc; 7. Connecting rod; 8. Spring 1; 9. Connecting frame; 10. Annular connecting plate; 11. Annular cover; 12. Through hole; 13. Threaded rod; 14. Side block; 15. Extrusion groove; 16. Extrusion block; 17. Spring 2; 18. Gear groove; 19. Gear; 20. Tooth mark plate; 21. Slide groove; 22. Slide bar; 23. Threaded block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1 - / 5, An embodiment of this utility model: A gas safety flow limiting valve for pipelines includes a gas pipe 1 and a flow limiting pipe 2. One end of the gas pipe 1 is connected to the flow limiting pipe 2 through a flange, and a valve seat is provided at the end of the gas pipe 1 near the flow limiting pipe 2. An annular connecting plate 10 is provided between the inner walls of the flow limiting pipe 2, and a connecting frame 9 is provided in the middle of the annular connecting plate 10. Through holes 12 are evenly provided near the edge of the annular connecting plate 10. A spring 8 is provided in the connecting frame 9, and a connecting rod 7 is provided at the other end of the spring 8. A valve disc 6 is provided at the other end of the connecting rod 7, and the valve disc 6 is in contact with the valve seat.

[0024] Specifically, such as Figure 1 As shown, when the gas enters the flow restrictor pipe 2 through the gas pipe 1, the gas can push the valve disc 6 to move under the action of the connecting rod 7. At this time, the spring-8 is deformed by force and the gas is discharged through the through hole 12 on the annular connecting plate 10. When the gas stops flowing, the spring-8 returns to its original deformation, pushes the connecting rod 7 to drive the valve disc 6 to reset, and seals the valve seat.

[0025] Side blocks 14 are provided at the middle positions of the top and bottom of the flow restrictor pipe 2 near the gas pipe 1 and between the valve seat. Threaded rods 13 are provided at the middle positions of the side blocks 14 away from the gas pipe 1. Threaded blocks 23 are threadedly connected to the threaded rods 13. An annular cover 11 is provided between the outer sides of the threaded blocks 23. A compression groove 15 is provided at the upper part of the side blocks 14. A second spring 17 is provided at the middle position of the upper part of the compression groove 15. A compression block 16 is provided at the other end of the second spring 17. A toothed plate 20 is provided at the bottom of the inner side of the compression block 16. A gear groove 18 is provided at the middle position of the side blocks 14 at the bottom of the toothed plate 20. One end of the threaded rod 13 extends into the gear groove 18 through a bearing. The threaded rod 13 in the gear groove 18 is provided as a smooth shaft section. Gears 19 are provided on the smooth shaft section of the threaded rod 13 in the gear groove 18. The gears 19 mesh with the toothed plate 20 through the gear groove 18.

[0026] Specifically, such as Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, when the gas pressure in the gas pipe 1 increases, the gas pushes the extrusion block 16 in the side block 14 into the extrusion groove 15. This causes the spring 17 to deform under the pressure of the extrusion block 16. At the same time, the extrusion block 16 drives the toothed plate 20 to slide in the extrusion groove 15. The toothed plate 20 drives the gear 19 meshing with it to rotate on the optical axis section of the threaded rod 13. This causes the threaded rod 13 to drive the threaded block 23 to move. The threaded block 23 then drives the annular cover 11 to move synchronously. The movement of the annular cover 11 reduces the flow area of ​​the flow-limiting pipe 2, thereby limiting the flow of gas. When there is overpressure, the annular cover 11 can fit against the annular connecting plate 10 to prevent excessive gas outflow and improve safety. When the gas pressure drops to a safe range, the elastic restoring force of the spring 17 will push the extrusion block 16 to move outward, causing the annular cover 11 to move in the opposite direction to expose the through hole 12, allowing the gas to flow again.

[0027] A rotating rod 5 is provided in the middle of the gas pipe 1, and rotating plates 4 are evenly provided in the middle of the outer side of the rotating rod 5, and a magnetic coupler 3 is provided at the top of the rotating rod 5.

[0028] Specifically, such as Figure 1 As shown, the rotating plate 4 is made of titanium alloy or carbon fiber composite material. When the gas is overpressured, it can drive the rotating plate 4 and the rotating rod 5 to rotate. When the rotating rod 5 rotates, the rotation speed is transmitted to the magnetic coupler 3. The magnetic coupler 3 converts the rotation speed of the rotating rod 5 into a magnetic signal, and controls the external safety valve switch through the magnetic signal, thereby quickly cutting off the gas flow and preventing the gas from continuing to leak and the safety hazards caused by overpressure.

[0029] Both sides of the toothed plate 20 are provided with slide bars 22, and each of the extrusion grooves 15 corresponding to the slide bars 22 is provided with a groove 21, and the groove 21 is slidably connected to the corresponding slide bar 22.

[0030] Specifically, such as Figure 3 As shown, when the toothed plate 20 moves, it can drive the slide bar 22 to move within the slide groove 21, which can make the movement of the toothed plate 20 more stable and prevent it from deviating.

[0031] Slots are evenly provided on the annular connecting plate 10 at the top and bottom of the through hole 12, and inserts are evenly provided on the slots of the annular connecting plate 10 at the positions corresponding to the edges of the annular cover 11, and the inserts on the edges of the annular cover 11 are all inserted into the slots of the annular connecting plate 10.

[0032] Specifically, such as Figure 1 As shown, after the annular cover 11 is moved to fit against the annular connecting plate 10, the insert block can be inserted into the slot, which can stably connect the annular cover 11 and the annular connecting plate 10, prevent the annular cover 11 from shaking, and improve the overall stability.

[0033] Working principle: During use, when gas enters the flow-limiting pipe 2 through the gas pipe 1, the gas pushes the valve disc 6 to move under the action of the connecting rod 7. At this time, the spring 8 deforms under force, and the gas is discharged through the through hole 12 on the annular connecting plate 10. When the gas flow stops, the spring 8 returns to its original deformation, pushing the connecting rod 7 to reset the valve disc 6 and seal the valve seat. When the gas pressure increases, the gas pushes the extrusion block 16 in the side block 14 into the extrusion groove 15, causing the spring 17 to deform under the pressure of the extrusion block 16. At the same time, the extrusion block 16 drives the toothed plate 20 to slide in the extrusion groove 15. When the toothed plate 20 moves, it drives the slide bar 22 to move in the slide groove 21, making the movement of the toothed plate 20 more stable and preventing it from deviating. Then, the toothed plate 20 drives the gear 19 meshing with it to rotate on the optical axis section of the threaded rod 13, causing the threaded rod 13 to drive the threaded block 23 to move, and the threaded block 23 to drive the annular cover 11 to move synchronously. The movement of the annular cover 11 reduces the flow area of ​​the flow-limiting pipe 2, thereby limiting the flow of gas. When there is overpressure, the annular cover 11 can fit against the annular connecting plate 10, allowing the insert block to be inserted into the slot. This ensures a stable connection between the annular cover 11 and the annular connecting plate 10, preventing the annular cover 11 from shaking and improving overall stability. This prevents excessive gas outflow and improves safety. At the same time, the overpressured gas can drive the rotating plate 4 and the rotating rod 5 to rotate. When the rotating rod 5 rotates, the rotation speed is transmitted to the magnetic coupler 3. The magnetic coupler 3 converts the rotation speed of the rotating rod 5 into a magnetic signal, which controls the external safety valve switch to quickly cut off the gas flow and prevent further gas leakage and safety hazards caused by overpressure. When the gas pressure drops to a safe range, the elastic restoring force of the spring 17 will push the squeezing block 16 to move outward, causing the annular cover 11 to move in the opposite direction to expose the through hole 12 and open the external safety valve, allowing the gas to flow again.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A gas safety flow limiting valve for pipelines, comprising a gas pipe (1) and a flow limiting pipe (2), characterized in that: One end of the gas pipe (1) is connected to the flow-limiting pipe (2) through a flange, and the gas pipe (1) is provided with a valve seat at the end near the flow-limiting pipe (2). An annular connecting plate (10) is provided between the inner walls of the flow-limiting pipe (2), and a connecting frame (9) is provided in the middle position of the annular connecting plate (10). Through holes (12) are uniformly provided near the edge of the annular connecting plate (10). Side blocks (14) are provided between the middle position of the top and bottom of the flow-limiting pipe (2) near the end of the gas pipe (1) and the valve seat. Threaded rods (13) are provided in the middle position of the side blocks (14) away from the gas pipe (1). Threaded blocks (23) are threadedly connected to the threaded rods (13). An annular cover (11) is provided between the outer sides of the threaded blocks (23). A rotating rod (5) is provided in the middle position of the gas pipe (1). Rotating plates (4) are uniformly provided in the middle position of the outer side of the rotating rod (5). A magnetic coupler (3) is provided at the top of the rotating rod (5).

2. A gas safety flow limiting valve for pipelines according to claim 1, characterized in that: The connecting frame (9) is provided with a spring (8), and the other end of the spring (8) is provided with a connecting rod (7). The other end of the connecting rod (7) is provided with a valve disc (6), and the valve disc (6) is in contact with the valve seat.

3. A gas safety flow limiting valve for pipelines according to claim 1, characterized in that: Each of the side blocks (14) has an extrusion groove (15) at the top, and each of the extrusion grooves (15) has a spring (17) at the middle position at the top, and each of the springs (17) has an extrusion block (16) at the other end.

4. A gas safety flow limiting valve for pipelines according to claim 3, characterized in that: The bottom of the inner side of the extrusion block (16) is provided with a toothed plate (20), and the middle position of the bottom side block (14) of the toothed plate (20) is provided with a gear groove (18).

5. A gas safety flow limiting valve for pipelines according to claim 1, characterized in that: One end of each threaded rod (13) extends into the gear groove (18) through a bearing, and each threaded rod (13) in the gear groove (18) is a smooth shaft section.

6. A gas safety flow limiting valve for pipelines according to claim 4, characterized in that: Gears (19) are provided on the optical axis section of the threaded rod (13) inside the gear groove (18), and the gears (19) mesh with the toothed plate (20) through the gear groove (18).

7. A gas safety flow limiting valve for pipelines according to claim 4, characterized in that: Both sides of the toothed plate (20) are provided with slide bars (22), and each of the extrusion grooves (15) corresponding to the slide bars (22) is provided with a groove (21), and each groove (21) is slidably connected to the corresponding slide bar (22).

8. A gas safety flow limiting valve for pipelines according to claim 1, characterized in that: Slots are evenly provided on the annular connecting plate (10) at the top and bottom of the through hole (12), and the slots on the annular connecting plate (10) are evenly provided with inserts at the positions corresponding to the edges of the annular cover (11), and the inserts at the edges of the annular cover (11) are all inserted into the slots of the annular connecting plate (10).

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