A flow restrictor for a gas valve

Abstract

The application provides a flow restrictor for a gas valve, which comprises an inlet pipe, an outlet pipe, a base and a flow-restricting cover. The base is connected with the flow-restricting cover, the inlet pipe is arranged on the flow-restricting cover, and the outlet pipe is arranged on the base. The inlet pipe and the outlet pipe correspond to each other and further comprise a plug rod, a top plate assembly, an external magnetic force assembly and a plurality of contraction assemblies. The flow restrictor for the gas valve is matched with the inlet pipe, the outlet pipe, the base, the flow-restricting cover, the plug rod, the top plate assembly, the external magnetic force assembly and the plurality of contraction assemblies. The flow restrictor can make the originally sealed spring in the plug rod rotate along the plug rod through the magnet, so that the originally damaged or abnormal-sounding spring enters the opening. In this way, the spring in the opening is not extruded and secondarily damaged when the flow-restricting plate works. The working life of the flow restrictor is effectively prolonged, the maintenance frequency is greatly reduced, and the personnel use is facilitated.

Description

Technical Field

[0001] This invention relates to the field of gas flow restrictors, specifically a flow restrictor for a gas valve. Background Technology

[0002] As is well known, burners using either bottled gas or natural gas as fuel frequently experience pipe detachment due to aging or unreliable connections at the end of the pipe, or even pipe rupture caused by external factors such as rodent bites, resulting in significant leaks. To prevent large-scale pipe leaks while ensuring the burner operates normally within the required flow range, a control valve must be installed at the burner's upstream end. When the valve opens, the inlet pressure is much higher than the outlet pressure, causing a large instantaneous flow that triggers the flow restrictor to close. Subsequently, due to the inlet pressure, the flow restrictor may fail to return to its original position or return slowly, resulting in abnormal valve opening and the burner malfunctioning.

[0003] For example, Chinese patent disclosure "A flow restrictor for a gas valve" (patent number: CN202222599989.5) includes a flow restrictor base, a flow restrictor plate, and a flow restrictor cover. The flow restrictor cover has an air inlet, and the flow restrictor base has an air outlet. A flow restrictor spring is provided between the flow restrictor plate and the flow restrictor base. Under the action of the flow restrictor spring, the flow restrictor plate has a tendency to move towards the flow restrictor cover. Under the action of the airflow pressure entering through the air inlet, the flow restrictor plate also has a tendency to move towards the flow restrictor base. After the airflow pressure overcomes the force of the flow restrictor spring, it can restrict the flow at the air outlet. It triggers the subsequent action of the gas valve by limiting the gas flow rate, without causing the gas valve to self-close due to the action of the gas valve. A vent hole is provided on the sealing surface of the flow restrictor base to ensure that the flow restrictor plate and the flow restrictor base are not completely sealed, so as to avoid non-rebound due to negative pressure.

[0004] However, after a period of use, the springs inside the aforementioned patent are prone to elasticity loss or even breakage. Once the springs malfunction, due to the sealed design, the entire device must be replaced, making it inconvenient for users. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a flow restrictor for gas valves.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a flow restrictor for a gas valve, comprising an inlet pipe, an outlet pipe, a base, and a flow restrictor cover. The base is connected to the flow restrictor cover, the inlet pipe is disposed on the flow restrictor cover, and the outlet pipe is disposed on the base. Corresponding to the inlet pipe and the outlet pipe, the device further includes a plug rod, a top plate assembly, an external magnetic assembly, and multiple contraction assemblies. The plug rod is disposed within the base, with one end disposed within the inlet pipe and the other end disposed within the outlet pipe. The top plate assembly is disposed on the plug rod, and the multiple contraction assemblies are disposed within the base. The contraction assemblies are linked to the top plate assembly.

[0007] Preferably, the top plate assembly includes a flow-limiting plate and a linkage assembly. The flow-limiting plate is sleeved on the insert rod, and the linkage assembly is disposed on the outside of the flow-limiting plate. Two grooves and an opening are provided on one side of the flow-limiting plate, and the opening and groove are alternately arranged on one side of the flow-limiting plate.

[0008] Preferably, the linkage assembly includes a magnet, a magnetic slider, a connecting rod, a fixed base, and a rotating wheel. The fixed base is disposed on the outer side of the flow-limiting plate, the magnetic slider is slidably fitted on the inner wall of the base, the connecting rod is movably sleeved with the magnetic slider, the magnet is disposed on one end of the connecting rod, and the other end of the connecting rod passes through the fixed base and is connected to the rotating wheel.

[0009] Preferably, it further includes a mounting ring seat, which is disposed within the base. Multiple retractable components are arranged at equal angles around the insertion rod on the mounting ring seat. Each retractable component includes a telescopic rod, a spring, and a top block. The telescopic rod is disposed on the mounting ring seat, the spring is sleeved on the telescopic rod, and the top block is disposed on the movable end of the telescopic rod.

[0010] Preferably, the cross-section of the top block is smaller than the opening, and the top block is adapted to the groove.

[0011] Preferably, it further includes a threaded sleeve and a ring seat, wherein the threaded sleeve is threadedly fitted onto one end of the inlet pipe located inside the flow restrictor. The ring seat is coaxially connected to the threaded sleeve, the threaded sleeve is in contact with one side of the flow restrictor plate, and the ring seat corresponds to the rotating wheel.

[0012] Preferably, the external magnetic component includes a first magnet, a fourth magnet, a motor, and two second magnets and a third magnet. The collar is fitted onto the flow restrictor, and the first magnet is disposed inside the collar. The first magnet attracts the magnetic slider. The motor is disposed on the collar, and the two second and third magnets are alternately disposed on the output end of the motor, with the second and third magnets corresponding to the fourth magnet.

[0013] This invention provides a flow restrictor for a gas valve. It has the following advantages:

[0014] 1. This flow restrictor for gas valves comprises an inlet pipe, an outlet pipe, a base, a flow restrictor cover, a plug rod, a top plate assembly, an external magnetic assembly, and multiple contraction assemblies that work together. This allows the invention to use a magnet to rotate a spring that was originally sealed inside along the plug rod, thereby allowing a damaged or noisy spring to enter the opening. This prevents the spring inside the opening from being compressed or further damaged when the flow restrictor is in operation, effectively extending the service life of the invention. It also significantly reduces maintenance frequency and simplifies operation. Attached Figure Description

[0015] Figure 1 This is a first perspective view of the present invention;

[0016] Figure 2 This is a second perspective view of the present invention;

[0017] Figure 3 This is a first perspective sectional view of the present invention;

[0018] Figure 4 This is a side sectional view of the present invention;

[0019] Figure 5 This is a second perspective sectional view of the present invention;

[0020] Figure 6 This is a perspective view of a first partial component of the present invention;

[0021] Figure 7 This is a perspective view of the second partial component of the present invention.

[0022] In the diagram: 1. Base, 2. Flow restrictor, 3. Inlet pipe, 4. Threaded sleeve, 5. Outlet pipe, 6. External magnetic assembly, 7. Magnet one, 8. Ring, 9. Top plate assembly, 10. Retraction assembly, 11. Insert rod, 12. Magnet two, 13. Magnet three, 14. Motor, 15. Flow restrictor, 16. Groove, 17. Rotating wheel, 18. Fixed seat, 19. Magnetic slider, 20. Connecting rod, 21. Magnet four, 22. Linkage assembly, 23. Mounting ring seat, 24. Spring, 25. Telescopic rod, 26. Top block, 27. Ring seat, 28. Opening. Detailed Implementation

[0023] This invention provides a flow restrictor for a gas valve, such as... Figure 1-7As shown, the system includes an inlet pipe 3, an outlet pipe 5, a base 1, and a flow restrictor 2. The base 1 is connected to the flow restrictor 2. The inlet pipe 3 is mounted on the flow restrictor 2, and the outlet pipe 5 is mounted on the base 1. Corresponding to the inlet pipe 3 and the outlet pipe 5, the system also includes a rod 11, a top plate assembly 9, an external magnetic assembly 6, and multiple retraction assemblies 10. The rod 11 is located inside the base 1, with one end inside the inlet pipe 3 and the other end inside the outlet pipe 5. The top plate assembly 9 is mounted on the rod 11, and the multiple retraction assemblies 10 are located inside the base 1. The retraction assemblies 10 are linked to the top plate assembly 9.

[0024] The top plate assembly 9 includes a flow-limiting plate 15 and a linkage assembly 22. The flow-limiting plate 15 is sleeved on the insert rod 11, and the linkage assembly 22 is disposed on the outside of the flow-limiting plate 15. Two grooves 16 and an opening 28 are provided on one side of the flow-limiting plate 15, and the opening 28 and the grooves 16 are alternately arranged on one side of the flow-limiting plate 15.

[0025] The linkage assembly 22 includes a magnet 21, a magnetic slider 19, a connecting rod 20, a fixed base 18, and a rotating wheel 17. The fixed base 18 is located on the outside of the flow limiting plate 15. The magnetic slider 19 is slidably fitted on the inner wall of the base 1. The connecting rod 20 is movably connected to the magnetic slider 19. The magnet 21 is located on one end of the connecting rod 20. The other end of the connecting rod 20 passes through the fixed base 18 and is connected to the rotating wheel 17.

[0026] It also includes a mounting ring seat 23, which is disposed within the base 1. Multiple retractable components 10 are arranged at equal angles to the mounting ring seat 23 around the insert rod 11. Each retractable component 10 includes a telescopic rod 25, a spring 24, and a top block 26. The telescopic rod 25 is disposed on the mounting ring seat 23, the spring 24 is sleeved on the telescopic rod 25, and the top block 26 is disposed on the movable end of the telescopic rod 25.

[0027] The cross-section of the top block 26 is smaller than that of the opening 28, and the top block 26 is adapted to the groove 16.

[0028] It also includes a threaded sleeve 4 and an annular seat 27. The threaded sleeve 4 is threadedly fitted onto one end of the inlet pipe 3 located inside the flow restrictor 2. The annular seat 27 is coaxially connected to the threaded sleeve 4. The threaded sleeve 4 is in contact with one side of the flow restrictor 15. The annular seat 27 corresponds to the rotating wheel 17.

[0029] The external magnetic assembly 6 includes magnet 7, magnet 21, motor 14, two magnets 12 and 13. A collar 8 is fitted onto the flow restrictor 2, with magnet 7 positioned inside the collar 8. Magnet 7 attracts the magnetic slider 19. Motor 14 is mounted on the collar 8, and magnets 12 and 13 are alternately positioned at the output end of motor 14, corresponding to magnet 21.

[0030] Working principle: During use, when the flow restrictor 15 is impacted by airflow, it will continuously retract, thereby compressing the spring 24 and the telescopic rod 25. After long-term use, the spring's elasticity will decrease or it may break directly, causing the flow restrictor 15 to malfunction.

[0031] When the flow restrictor 15 breaks directly or makes abnormal noise, the operator can adjust the collar 8 to make the magnet 7 attract the magnetic slider 19, then rotate the collar 8 to make the flow restrictor 15 rotate, forcing the damaged spring 24 to separate from the groove 16 and enter the opening 28. In this way, the damaged spring 24 will not be squeezed by the flow restrictor 15, and a new spring 24 will provide support, thus completing the operation of replacing the spring 24 in the base 1 from the outside.

[0032] When the flow restrictor 15 becomes less elastic due to frequent operation, the magnet 17 can be moved forward, which will drive the magnetic slider 19 to move the connecting rod 20 from the fixed seat 18 forward, so that the rotating wheel 17, which was originally separated from the ring seat 27, can re-engage with the ring seat 27. Then, the motor 14 is controlled to drive the magnet 22 and the magnet 3 to rotate, which will force the magnet 4 21 to rotate as well. This will allow the rotating wheel 17 to control the rotation of the ring seat 27, allowing the threaded sleeve 4 to extend and retract from the inlet pipe 3, and further make the threaded sleeve 4 fit tightly against the flow restrictor 15.

[0033] In summary, this flow restrictor for a gas valve, through the coordinated arrangement of the inlet pipe 3, outlet pipe 5, base 1, flow restrictor 2, insert rod 11, top plate assembly 9, external magnetic assembly 6, and multiple contraction assemblies 10, allows the invention to use a magnet to rotate the originally sealed spring 24 along the insert rod 11, thereby allowing the previously damaged or noisy spring 24 to enter the opening 28. This prevents the spring 24 from being squeezed or further damaged when the flow restrictor 15 is in operation, effectively extending the service life of the invention, significantly reducing maintenance frequency, and facilitating user operation.

Claims

1. A flow restrictor for a gas valve, characterized in that: The device includes an inlet pipe (3), an outlet pipe (5), a base (1), and a flow restrictor (2). The base (1) is connected to the flow restrictor (2). The inlet pipe (3) is installed on the flow restrictor (2). The outlet pipe (5) is installed on the base (1). The inlet pipe (3) and the outlet pipe (5) correspond to each other. The device also includes a plug rod (11), a top plate assembly (9), an external magnetic assembly (6), and multiple shrinking assemblies (10). The plug rod (11) is installed inside the base (1). One end of the plug rod (11) is installed inside the inlet pipe (3), and the other end is installed inside the outlet pipe (5). The top plate assembly (9) is installed on the plug rod (11). Multiple shrinking assemblies (10) are installed inside the base (1). The shrinking assemblies (10) are linked to the top plate assembly (9). The top plate assembly (9) includes a flow limiting plate (15) and a linkage assembly (22). The flow limiting plate (15) is sleeved on the plug rod (11). The linkage assembly (22) is disposed on the outside of the flow limiting plate (15). Two grooves (16) and an opening (28) are provided on one side of the flow limiting plate (15). The opening (28) and the grooves (16) are alternately disposed on one side of the flow limiting plate (15). The linkage component (22) includes a magnet (21), a magnetic slider (19), a connecting rod (20), a fixed seat (18), and a rotating wheel (17). The fixed seat (18) is located on the outside of the flow limiting plate (15). The magnetic slider (19) is slidably fitted on the inner wall of the base (1). The connecting rod (20) is movably connected to the magnetic slider (19). The magnet (21) is located on one end of the connecting rod (20). The other end of the connecting rod (20) passes through the fixed seat (18) and is connected to the rotating wheel (17). It also includes a threaded sleeve (4) and an annular seat (27). The threaded sleeve (4) is threadedly fitted on one end of the inlet pipe (3) located inside the flow restrictor (2). The annular seat (27) is coaxially connected to the threaded sleeve (4). The threaded sleeve (4) is in contact with one side of the flow restrictor (15). The annular seat (27) corresponds to the rotating wheel (17). The external magnetic component (6) includes a magnet (7), a magnet (21), a motor (14), two magnets (12) and a magnet (13). A collar (8) is fitted on the flow restrictor (2). The magnet (7) is located inside the collar (8). The magnet (7) attracts the magnetic slider (19). The motor (14) is located on the collar (8). The two magnets (12) and the magnet (13) are alternately arranged on the output end of the motor (14). The magnets (12) and the magnet (13) correspond to the magnet (21).

2. A flow restrictor for a gas valve according to claim 1, characterized in that: It also includes a mounting ring seat (23), which is set inside the base (1). Multiple retractable components (10) are set at equal angles around the insert rod (11) on the mounting ring seat (23). The retractable components (10) include a telescopic rod (25), a spring (24) and a top block (26). The telescopic rod (25) is set on the mounting ring seat (23), the spring (24) is sleeved on the telescopic rod (25), and the top block (26) is set on the movable end of the telescopic rod (25).

3. A flow restrictor for a gas valve according to claim 2, characterized in that: The cross-section of the top block (26) is smaller than that of (29), and the top block (26) is adapted to the groove (16).

Images