Timing pressure reducing valve

Abstract

The utility model provides a timing pressure reducing valve, and belongs to the technical field of gas accessories. The problem that an existing timing pressure reducing valve is complex in structure is solved. The timing pressure reducing valve comprises a valve body and a pressure reducing assembly, a timer is connected to the valve body, a transmission pressing block is arranged in the timer, the valve body is provided with a valve seat, the valve seat is provided with an air passing hole, a diaphragm which seals the top of the valve seat and allows the transmission pressing block to abut against is embedded in the valve body, the valve body is fixedly connected with a pressing plate which tightly presses the edge of the diaphragm, and a connecting rod is arranged in the air passing hole in a penetrating mode. The upper end of the connecting rod is fixedly connected with the diaphragm, the lower end, extending out of the valve seat, of the connecting rod is provided with a blocking shoulder protruding outwards in the radial direction, the connecting rod is sleeved with a sealing gasket located between the valve seat and the blocking shoulder, the connecting rod is further sleeved with a reset spring located in the valve seat, the lower end of the reset spring abuts against the valve seat, and the upper end of the reset spring acts on the diaphragm. The reset spring provides elastic force, so that the sealing gasket always has the trend of abutting against the valve seat to seal the air passing hole. The utility model has the advantages of simple structure, good use stability and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas fittings, and relates to a pressure reducing valve, in particular to a timing pressure reducing valve. Background Art

[0002] A timing pressure reducing valve is a gas pressure reducing valve with a timing function. When gas is needed, estimate the gas usage time, rotate the timing switch of the timing pressure reducing valve to the required time, and the gas starts to be connected for supply. After reaching the preset time, the timing pressure reducing valve automatically closes, thus avoiding the problem of forgetting to turn off the gas and improving the usage safety.

[0003] For example, a Chinese patent document discloses a gas timing pressure reducing valve [Application No.: 201420094578.3; Authorization Publication No.: CN204025803U], which includes a valve body, a valve core assembly and a valve seat located in the valve cavity of the valve body, a pressure reducing assembly for reducing the gas pressure, a timer installed on the valve body, and an elastic transmission sealing piece. The timer includes a timing assembly and a timing transmission part for transmitting timing information. The valve core assembly includes a valve core sealing piece that fits with the valve seat to form a sealing pair, a valve core bearing part for carrying the valve core sealing piece, a sealing spring for applying a sealing force, and a valve core transmission part for cooperating with the timing transmission part to transmit timing information. The two sides of the transmission sealing piece are respectively in contact with the timing transmission part and the valve core transmission part. The timer and the valve core assembly are configured such that when the timer is in the timing state, the timer acts on the valve core bearing part through the timing transmission part and the valve core transmission part to separate the valve core sealing piece from the valve seat. When the timing of the timer is completed, the valve core bearing part is affected by the force of the sealing spring to make the valve core sealing piece fit with the valve seat.

[0004] The above-mentioned gas timing pressure reducing valve can reduce the failure rate of the timer, but it combines the valve core assembly and the pressure reducing assembly together, making the structure complex. Moreover, when designing, it is necessary to consider the combined force situation formed by the sealing spring, the pressure reducing spring and the diaphragm, which makes the manufacturing difficult. In addition, during the use process, the change of the gas inlet pressure will cause the axial displacement of the valve core bearing part, and the valve core bearing part will drive the third transmission part and the second transmission part to displace, applying an upward or downward force to the timer, which will affect the accuracy of the timer and also reduce the fatigue resistance of the timer parts, and will shorten the service life of the timer. Summary of the Invention

[0005] The purpose of the utility model is to provide a timing pressure reducing valve with a simple structure, good use stability and long service life for the above problems existing in the prior art.

[0006] The object of the present utility model can be achieved by the following technical solutions: A timing pressure reducing valve, comprising a valve body and a pressure reducing component. The valve body has an air inlet end and an air outlet end, and a timer is connected to the valve body. The timer has a transmission pressing block inside. It is characterized in that the valve body has a valve seat located at the inner end of the air outlet end and separating the inner cavity of the valve body into an air inlet cavity and an air outlet cavity. The pressure reducing component is arranged in the air inlet cavity. The air inlet end is communicated with the air inlet cavity, and the air outlet end is communicated with the air outlet cavity. The valve seat has a through hole communicating the air inlet cavity and the air outlet cavity. The valve body is embedded with a diaphragm that seals the top of the valve seat and is for the transmission pressing block to abut against. The valve body is fixedly connected by screws with a pressing plate that presses the edge of the diaphragm. A connecting rod passes through the through hole. The upper end of the connecting rod is fixedly connected to the diaphragm. The lower end of the connecting rod extending out of the valve seat has a radially protruding shoulder. A sealing gasket is sleeved on the connecting rod between the valve seat and the shoulder. A return spring is also sleeved on the connecting rod inside the valve seat. The lower end of the return spring abuts against the valve seat, and the upper end of the return spring acts on the diaphragm. The return spring provides an elastic force so that the sealing gasket always has a tendency to abut against the valve seat to seal the through hole.

[0007] In the above-mentioned timing pressure reducing valve, the upper end of the connecting rod is embedded in a groove in the middle of the diaphragm. A circlip and a washer are embedded at the upper end of the connecting rod. The upper end of the return spring abuts against the washer, and the top surface of the washer abuts against the circlip.

[0008] In the above-mentioned timing pressure reducing valve, the pressure reducing component includes an elastic membrane, a support plate, a pressure reducing spring, and a tightening cap. The elastic membrane separates the air inlet cavity from the lower part of the inner cavity of the valve body. The support plate supports the bottom of the elastic membrane. The tightening cap is connected to the bottom of the valve body by external threads. The upper end of the pressure reducing spring abuts against the support plate, and the lower end of the pressure reducing spring abuts against the tightening cap. The support plate is threadedly connected with a connecting seat extending out of the top of the elastic membrane. The air inlet end is inserted with a guide seat. The guide seat is hollow and has a ring of inwardly protruding rings in the middle of the inner wall. The outer wall of the guide seat extending out of the air inlet end has a radially penetrating through hole. A slider is inserted in the guide seat. A sealing block is embedded at the end of the slider facing the ring. The guide seat is hinged with a transmission rod. The transmission rod has a driving part inserted into the slider. The middle of the connecting rod is bent downward and the connecting rod passes through the connecting seat.

[0009] In the above-mentioned timing pressure reducing valve, the guide seat is embedded with several sealing rings that seal the inner wall of the air inlet end.

[0010] In the above-mentioned timing pressure reducing valve, a protective cap that covers the tightening cap is riveted at the bottom of the valve body.

[0011] In the above-mentioned timing pressure reducing valve, a pipe joint is threadedly connected to the air inlet end. A handwheel is sleeved on the pipe joint. The handwheel has a connecting section with external threads. An annular sealing ring is embedded in the end of the guide seat facing the pipe joint. Steel balls are arranged in the valve body between the pipe joint and the guide seat.

[0012] Compared with the prior art, the structure of this timing pressure reducing valve is simple. The pressure reducing component works independently, and the timing component formed by the timer, transmission pressure block, return spring and gasket also works independently without interfering with each other, with good working stability and long service life. Description of the Drawings

[0013] Figure 1 is a three-dimensional structure diagram of this timing pressure reducing valve.

[0014] Figure 2 is a structural sectional view of this timing pressure reducing valve.

[0015] Figure 3 is a partial structure diagram of this timing pressure reducing valve.

[0016] In the figure, 1. Valve body; 2. Air inlet end; 3. Air outlet end; 4. Timer; 5. Transmission pressure block; 6. Air inlet chamber; 7. Air outlet chamber; 8. Valve seat; 9. Air passage hole; 10. Diaphragm; 11. Pressure plate; 12. Connecting rod; 13. Shoulder; 14. Gasket; 15. Return spring; 16. Snap ring; 17. Washer; 18. Elastic membrane; 19. Support plate; 20. Pressure reducing spring; 21. Tightening cap; 22. Connecting seat; 23. Guide seat; 24. Convex ring; 25. Through hole; 26. Slide block; 27. Sealing block; 28. Transmission rod; 29. Driving part; 30. Sealing ring; 31. Protective cap; 32. Pipe joint; 33. Handwheel; 34. Connecting section; 35. Sealing ring; 36. Steel ball. Detailed Embodiment

[0017] The following are specific embodiments of the present invention and in combination with the drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0018] As Figure 1 , Figure 2 and Figure 3As shown in the figure, this timing pressure reducing valve includes a valve body 1 and a pressure reducing component. The valve body 1 has an air inlet end 2 and an air outlet end 3. A timer 4 is connected to the valve body 1. There is a transmission pressure block 5 inside the timer 4. The valve body 1 has a valve seat 8 located at the inner end of the air outlet end 3, which divides the inner cavity of the valve body 1 into an air inlet cavity 6 and an air outlet cavity 7. The pressure reducing component is arranged in the air inlet cavity 6. The air inlet end 2 is communicated with the air inlet cavity 6, and the air outlet end 3 is communicated with the air outlet cavity 7. The valve seat 8 has an air passing hole 9 communicating the air inlet cavity 6 and the air outlet cavity 7. The valve body 1 is embedded with a diaphragm 10 that seals the top of the valve seat 8 and is for the transmission pressure block 5 to abut against. The valve body 1 is fixedly connected by screws with a pressing plate 11 that presses the edge of the diaphragm 10. A connecting rod 12 passes through the air passing hole 9. The upper end of the connecting rod 12 is fixedly connected to the diaphragm 10. The lower end of the connecting rod 12 extending out of the valve seat 8 has a radially protruding shoulder 13. A sealing gasket 14 is sleeved on the connecting rod 12 and is located between the valve seat 8 and the shoulder 13. A return spring 15 is also sleeved on the connecting rod 12 and is located inside the valve seat 8. The lower end of the return spring 15 abuts against the valve seat 8, and the upper end of the return spring 15 acts on the diaphragm 10. The return spring 15 provides an elastic force so that the sealing gasket 14 always has a tendency to abut against the valve seat 8 to seal the air passing hole 9.

[0019] In this timing pressure reducing valve, the pressure reducing component works independently, and the timing component formed by the timer 4, the transmission pressure block 5, the return spring 15 and the sealing gasket 14 also works independently, without interfering with each other, having good working stability and long service life. Moreover, multiple sets of transmission connection structures are omitted, and the structure is simple.

[0020] When this timing pressure reducing valve is not in use, the elastic force of the return spring 15 makes the sealing gasket 14 seal the air passing hole 9, and the air outlet end 3 cannot discharge air. When in use, operate the timer 4 to set the usage duration. The transmission pressure block 5 overcomes the elastic force of the return spring 15 and presses down the connecting rod 12. The sealing gasket 14 disengages from the valve seat 8, and the air passing hole 9 connects the air inlet cavity 6 and the air outlet cavity 7. The gas enters the air inlet cavity 6 from the air inlet end 2, then passes through the air passing hole 9, enters the air outlet cavity 7, and then flows out from the air outlet end 3. When the set duration is reached, the timer 4 stops, and the elastic force of the return spring 15 makes the sealing gasket 14 abut against the valve seat 8 again and seal the air passing hole 9.

[0021] The upper end of the connecting rod 12 is embedded in a groove in the middle of the diaphragm 10. A circlip 16 and a washer 17 are embedded at the upper end of the connecting rod 12. The upper end of the return spring 15 abuts against the washer 17, and the top surface of the washer 17 abuts against the circlip 16. In this way, the structure is simple and the connection is convenient.

[0022] The pressure reducing assembly includes an elastic membrane 18, a support plate 19, a pressure reducing spring 20, and a tightening cap 21. The elastic membrane 18 separates the air inlet cavity 6 from the lower part of the inner cavity of the valve body 1. The support plate 19 is supported at the bottom of the elastic membrane 18. The tightening cap 21 is connected to the bottom of the valve body 1 through an external thread. The upper end of the pressure reducing spring 20 abuts against the support plate 19, and the lower end of the pressure reducing spring 20 abuts against the tightening cap 21. The support plate 19 is threadedly connected to a connecting seat 22 extending from the top of the elastic membrane 18. The air inlet end 2 is plugged with The guide seat 23 is hollow and has a circle of inwardly convex convex ring 24 in the middle of the inner wall of the guide seat 23. The outer wall of the guide seat 23 extending out of the air inlet end 2 has a radially penetrating through hole 25. A slider 26 is inserted in the guide seat 23, and a sealing block 27 is embedded in the end of the slider 26 facing the convex ring 24. The guide seat 23 is hinged with a transmission rod 28, and the transmission rod 28 has a driving part 29 inserted into the slider 26. The middle part of the connecting rod 12 is bent downward and the connecting rod 12 is arranged through the connecting seat 22.

[0023] By turning the tightening cap 21, the elastic force of the decompression spring 20 can be adjusted, so as to set the appropriate elasticity. During use, the decompression spring 20 provides elastic force, so that the elastic membrane 18 has a tendency to bulge upward, the elastic membrane 18 drives the connecting seat 22 to rise, the connecting seat 22 drives the transmission rod 28 to rotate around its hinge, and the driving part 29 of the transmission rod 28 drives the slider 26 to move toward the convex ring 24, but the slider 26 will not separate from the guide seat 23. When the air intake end 2 is inhaled, the gas impacts the elastic membrane 18 and overcomes the elastic force of the decompression spring 20, so that the elastic membrane 18 and the connecting seat 22 are lowered, and the slider 26 is driven by the transmission rod 28 to move toward the convex ring 24 side, and the sealing block 27 and the convex ring 24 is reduced, thereby playing a role in reducing pressure, so that the outlet end 3 is the set outlet pressure; when the gas pressure at the inlet end 2 increases, the elastic membrane 18 descends, and drives the slider 26 to approach the convex ring 24 through the connecting seat 22 and the transmission rod 28, thereby reducing the intake gap and reducing the intake pressure, so that the gas pressure at the outlet end 3 is constant; conversely, when the pressure in the intake cavity 6 decreases, the elastic membrane 18 rises, and drives the slider 26 away from the convex ring 24 through the connecting seat 22 and the transmission rod 28, thereby increasing the intake gap and increasing the intake pressure, so that the gas pressure at the outlet end 3 is constant.

[0024] The guide seat 23 is embedded with three sealing rings 30 sealed to the inner wall of the air inlet end 2, so that the sealing is good to prevent gas leakage. A protective cap 31 covering the screw cap 21 is riveted on the bottom of the valve body. The protective cap 31 protects the screw cap 21 and prevents the user from rotating the screw cap 21 by mistake, thereby ensuring the stability of the outlet pressure.

[0025] The intake end 2 is threadedly connected with a pipe joint 32. A handwheel 33 is sleeved on the pipe joint 32. The handwheel 33 has a connecting section 34 with external threads. An annular sealing ring 35 is embedded in the end of the guide seat 23 facing the pipe joint 32. Steel balls 36 are arranged in the valve body 1 between the pipe joint 32 and the guide seat 23. The pipe joint 32 and the handwheel 33 are provided for easy connection. When the gas flow rate at the intake end 2 exceeds the standard, the gas impacts the steel balls 36 to block them against the sealing ring 35, playing a role of overcurrent cut-off and improving the use safety.

[0026] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art in the technical field to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A timed pressure reducing valve, comprising a valve body (1) and a pressure reducing assembly, wherein the valve body (1) has an air inlet end (2) and an air outlet end (3), the valve body (1) is connected to a timer (4), and the timer (4) has a transmission pressure block (5), characterized in that: The valve body (1) has a valve seat (8) located at the inner end of the outlet end (3) and dividing the inner cavity of the valve body (1) into an inlet cavity (6) and an outlet cavity (7); the pressure reducing assembly is arranged in the inlet cavity (6); the inlet end (2) is connected to the inlet cavity (6); the outlet end (3) is connected to the outlet cavity (7); the valve seat (8) has an air hole (9) connecting the inlet cavity (6) and the outlet cavity (7); the valve body (1) is embedded with a diaphragm (10) for sealing the top of the valve seat (8) and for the transmission pressure block (5) to abut against; the valve body (1) is fixedly connected to a pressure plate (11) for pressing the edge of the diaphragm (10) by screws; the A connecting rod (12) is passed through the air hole (9), the upper end of the connecting rod (12) is fixedly connected to the diaphragm (10), the lower end of the connecting rod (12) extending out of the valve seat (8) has a radially outwardly protruding shoulder (13), the connecting rod (12) is sleeved with a sealing gasket (14) located between the valve seat (8) and the shoulder (13), the connecting rod (12) is also sleeved with a return spring (15) located in the valve seat (8), the lower end of the return spring (15) abuts against the valve seat (8), the upper end of the return spring (15) acts on the diaphragm (10), the return spring (15) provides elastic force so that the sealing gasket (14) always has a tendency to abut against the valve seat (8) to seal the air hole (9).

2. The timing pressure reducing valve according to claim 1, characterized in that: The upper end of the connecting rod (12) is embedded in a groove in the middle of the diaphragm (10), a retaining spring (16) and a washer (17) are embedded in the upper end of the connecting rod (12), the upper end of the return spring (15) abuts against the washer (17), and the top surface of the washer (17) abuts against the retaining spring (16).

3. The timing pressure reducing valve according to claim 1 or 2, characterized in that: The pressure reducing assembly comprises an elastic membrane (18), a support plate (19), a pressure reducing spring (20), and a tightening cap (21); the elastic membrane (18) separates the air inlet cavity (6) from the lower part of the inner cavity of the valve body (1); the support plate (19) is supported on the bottom of the elastic membrane (18); the tightening cap (21) is connected to the bottom of the valve body (1) via an external thread; the upper end of the pressure reducing spring (20) abuts against the support plate (19); the lower end of the pressure reducing spring (20) abuts against the tightening cap (21); the support plate (19) is threadedly connected to a connecting seat (22) extending from the top of the elastic membrane (18); the air inlet end (2) is plugged with a guide The guide seat (23) is hollow and has a convex ring (24) in the middle of the inner wall of the guide seat (23). The outer wall of the guide seat (23) extending out of the air inlet end (2) has a radially penetrating through hole (25). A slider (26) is inserted into the guide seat (23). A sealing block (27) is embedded in the end of the slider (26) facing the convex ring (24). The guide seat (23) is hinged with a transmission rod (28). The transmission rod (28) has a driving portion (29) inserted into the slider (26). The middle portion of the connecting rod (12) is bent downward and the connecting rod (12) is arranged to pass through the connecting seat (22).

4. The timing pressure reducing valve according to claim 3, characterized in that: The guide seat (23) is embedded with a plurality of sealing rings (30) which are sealed to the inner wall of the air inlet end (2).

5. The timing pressure reducing valve according to claim 4, characterized in that: A protective cap (31) is riveted onto the bottom of the valve body (1) to cover the screw cap (21).

6. The timing pressure reducing valve according to claim 5, characterized in that: The air inlet end (2) is threadedly connected to a pipe joint (32), the pipe joint (32) is sleeved with a hand wheel (33), the hand wheel (33) has an externally threaded connection section (34), an annular sealing ring (35) is embedded in the end of the guide seat (23) facing the pipe joint (32), and a steel ball (36) is disposed in the valve body (1) between the pipe joint (32) and the guide seat (23).

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