Inertia pressure release valve structure with adjustable stroke

Abstract

The utility model relates to the technical field of hydraulic control, in particular to an inertia pressure release valve structure with an adjustable stroke, which comprises a valve seat, a valve core, a valve rod and a valve rod, the valve body is fixedly connected with the valve seat, and a containing space is formed in the valve body; a control air cavity air inlet is formed in one side of the valve body; pressure relief openings are formed in the periphery, close to the valve seat, of the valve body. The adjusting module comprises an adjusting assembly and a mounting seat; the mounting seat is fixedly connected with the top end of the valve body and is provided with an adjusting channel; the adjusting assembly penetrates through the valve body. The adjusting assembly does linear motion in the adjusting channel and moves in the direction close to or away from the valve seat. The valve core is arranged in the accommodating space; one end sinks inwards to form a sunken area, and the other end protrudes outwards to form a protruding area; the concave area is matched with the mounting seat; the protruding area faces the valve seat; the valve element does linear motion in the containing space and moves in the direction close to or away from the valve seat. The pressure leakage rate is effectively controlled, and control is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic control, in particular to an inertial pressure relief valve structure with adjustable stroke. Background Art

[0002] Inertia pressure relief valves are critical devices widely used in industrial automation, fluid control systems, and safety protection. Their primary function is to quickly open the valve to release excess pressure when system pressure exceeds a preset value, thereby protecting the system from damage. Leveraging internal mechanical structures or fluid dynamics, inertia pressure relief valves respond to pressure changes in an extremely short time, achieving rapid pressure relief. This rapid response makes them a preferred solution for many high-risk applications, such as pressure vessels and piping systems in the chemical, oil, and gas industries.

[0003] The inertia pressure relief valve is a safety valve, which is mainly used for exhausting high-pressure gases. The size of the pressure relief port can be controlled by adjusting the valve core stroke by adjusting the screw, and the opening pressure can be controlled by changing the intake pressure. In the existing technology, the safety valve usually adopts a spring-type safety valve. When the medium pressure is greater than the spring preload, the valve core opens, releasing the medium to reduce the internal pressure, but the starting pressure of the safety valve is fixed and cannot be adjusted, and the pressure leakage cannot be controlled. At the same time, due to the characteristics of the spring itself, the size of the pressure relief port cannot be controlled and can only change with the amount of spring lift.

[0004] Therefore, there is an urgent need for an inertial pressure relief valve structure with adjustable stroke to adjust the starting pressure and control the pressure leakage. Summary of the Invention

[0005] The utility model provides an inertial pressure relief valve structure with adjustable stroke, which can change the size of the pressure relief port by adjusting the stroke of the valve core, thereby effectively solving the problem of being unable to control the pressure leakage amount.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0007] An inertia pressure relief valve structure with adjustable stroke, comprising:

[0008] Valve seat, with an impact port in the center of the valve seat;

[0009] The valve body is located above the valve seat and is fixedly connected to the valve seat. An accommodating space is provided inside the valve body. A control air cavity air inlet is provided on one side of the valve body. A pressure relief port is provided around the valve body near the valve seat.

[0010] The regulating module includes a regulating assembly and a mounting seat; the mounting seat is fixedly connected to the top of the valve body and has a regulating channel; the regulating assembly passes through the valve body and moves linearly in the regulating channel, moving toward or away from the valve seat;

[0011] The valve core is arranged in the accommodating space; one end is recessed inward to form a recessed area, and the other end protrudes outward to form a protruding area; the contour of the recessed area is adapted to the mounting seat; the protruding area faces the valve seat; the valve core moves linearly in the accommodating space, moving toward or away from the valve seat.

[0012] Furthermore, a first sealing groove and a rivet groove are provided on the upper end surface of the valve seat. The rivet groove is closer to the valve body than the first sealing groove, and the rivet groove fits the first sealing groove. A first sealing ring is provided in the first sealing groove.

[0013] Furthermore, the mounting seat has a limiting groove, and the adjustment assembly includes a limiting screw sleeve and an adjusting screw; the part of the adjusting screw close to the top of the valve body has a limiting block arranged along the circumference of the axis, the limiting block is embedded in the limiting groove, and the limiting screw sleeve and the adjusting screw are threadedly connected in the adjustment channel and close to the valve seat.

[0014] Furthermore, a buffer pad is provided at one end of the limiting screw sleeve close to the valve seat, and the edge of the buffer pad does not exceed the limiting screw sleeve, thereby providing a buffer for the movement of the valve core.

[0015] Furthermore, the adjustment module includes a locking assembly connected to the adjustment screw.

[0016] Furthermore, a second sealing groove group and a spare groove are opened on the inner wall of the valve body; a second sealing ring group is arranged in the second sealing groove group; a supporting groove is opened on the inner wall of the valve body, a supporting ring is arranged in the supporting groove, and the supporting ring supports the valve core.

[0017] Furthermore, the impact port has a certain inclination angle along the circumferential direction toward the upper surface of the valve seat; and the protruding area has an inclination from the center toward the surroundings that matches the impact port.

[0018] Furthermore, high-pressure gas is introduced from the air inlet of the control air cavity to push the valve core toward the valve seat until the valve core presses the valve seat. At this time, the protruding area exceeds the upper end surface of the valve seat and enters the impact port, and the first sealing ring seals the impact port; the pressure relief port stops relieving pressure.

[0019] Furthermore, when the force exerted on the protruding area through the impact port is greater than the force exerted on the valve core through the control air cavity inlet, the valve core moves in a direction away from the valve seat, the impact port is connected to the pressure relief port, and the pressure relief port begins to relieve pressure.

[0020] Furthermore, the recessed area has a limiting angle with a certain angle extending from the inner wall toward the outer wall at one end close to the regulating module; and an annular groove is provided on the inner wall of the valve body opposite to the limiting angle.

[0021] The technical solution of this utility model can achieve the following technical effects:

[0022] The inertial pressure relief valve structure with adjustable stroke in the utility model controls the movement range of the valve core through the movement of the adjustment module, thereby achieving the purpose of adjusting the stroke; and changes the size of the pressure relief port that can be relieved by the pressure relief port through the linear movement of the valve core, thereby achieving the effect of controlling the pressure relief amount; and the pressure of the high-pressure gas introduced into the air inlet of the control air cavity is easy to adjust, and the starting pressure of the pressure relief, that is, the force that pushes the valve core away from the valve seat, also changes with the change of the high-pressure gas pressure; the multi-level sealing structure provided seals the inertial pressure relief valve from multiple aspects, thereby reducing the risk of product leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a structural diagram of an inertial pressure relief valve structure with adjustable stroke in an embodiment of the present utility model;

[0025] Figure 2 This is a cross-sectional view of the valve body of the inertial pressure relief valve structure with adjustable stroke in an embodiment of the present utility model;

[0026] Figure 3 It is a cross-sectional schematic diagram of the regulating module of the inertial pressure relief valve structure with adjustable stroke in an embodiment of the present utility model;

[0027] Figure 4 It is a cross-sectional schematic diagram of the inertial pressure relief valve structure with adjustable stroke in the embodiment of the present utility model, in which the pressure relief valve is in an open state and is releasing pressure;

[0028] Figure 5 It is a cross-sectional schematic diagram of the pressure relief valve in the inertial pressure relief valve structure with adjustable stroke in the embodiment of the present invention, in the closed state where pressure relief is stopped.

[0029] Figure markings: 1. Valve seat; 11. Impact port; 12. First sealing groove; 12a. First sealing ring; 13. Riveted groove; 2. Valve body; 21. Accommodating space; 22. Control air cavity air inlet; 23. Pressure relief port; 24. Second sealing groove group; 24a. Second sealing ring group; 25. Spare groove; 26. Support groove; 26a. Support ring; 27. Ring groove; 3. Adjustment module; 31. Adjustment assembly; 31a. Limiting screw sleeve; 31a1. Buffer pad; 31b. Adjustment screw; 31b1. Limiting block; 32. Mounting seat; 32a. Adjustment channel; 32b. Limiting groove; 33. Locking assembly; 4. Valve core; 41. Recessed area; 41a. Limiting angle; 42. Protruding area. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] like Figures 1 to 5 As shown, an inertia pressure relief valve structure with adjustable stroke includes:

[0033] The valve seat 1 has an impact opening 11 in the center thereof; preferably, the impact opening 11 is located in the middle of its length direction toward the upper surface of the valve seat 1 at a certain inclination angle, forming a gap similar to a funnel opened in the center of the valve seat 1; when the pressure relief valve needs to relieve pressure, an impact air wave will pass through the impact opening 11 under the valve seat 1 to relieve pressure; a lower portion may be provided around the valve seat 1 for fixing;

[0034] The valve body 2 is located above the valve seat 1 and is fixedly connected to the valve seat 1. An accommodating space 21 is defined within the valve body 2. A controlled air inlet is defined on one side of the valve body 2, connecting the exterior to the accommodating space 21. A certain amount of high-pressure gas is introduced into the accommodating space 21 from the exterior, thereby squeezing the accommodating space 21 within the valve body 2. A plurality of pressure relief ports 23 are defined around the valve body 2 near the valve seat 1. When viewed horizontally, the pressure relief ports 23 are higher than the height of the valve seat 1. The accommodating space 21 within the valve body 2 serves as a flow path for the shock wave from the shock port 11 to the pressure relief ports 23.

[0035] The regulating module 3 includes an regulating assembly 31 and a mounting seat 32. The mounting seat 32 is fixedly connected to the top of the valve body 2 and defines a regulating passage 32a. The regulating assembly 31 passes through the valve body 2 and moves linearly within the regulating passage 32a, moving toward or away from the valve seat 1.

[0036] The valve core 4 is disposed within the accommodating space 21. One end is recessed inward to form a recessed area 41, and the other end protrudes outward to form a protruding area 42. The contour of the recessed area 41 is adapted to fit the mounting seat 32. The protruding area 42 faces the valve seat 1. The valve core 4 moves linearly within the accommodating space 21, moving toward or away from the valve seat 1. The travel of the valve core 4 within the accommodating space 21 is from the protruding area 42 pressing against the valve seat 1 to the inner wall of the recessed area 41 pressing against the regulating module 3.

[0037] When the valve core 4 moves in a direction away from the valve seat 1, it will eventually press against the adjusting component 31. At this time, the linear movement of the adjusting component 31 will change the movable stroke of the valve core 4, thereby changing the pressure relief area of ​​the pressure relief port 23, thereby affecting the pressure leakage amount.

[0038] A first sealing groove 12 and a rivet groove 13 are provided on the upper end surface of the valve seat 1. The rivet groove 13 is closer to the valve body 2 than the first sealing groove 12, and the rivet groove 13 fits the first sealing groove 12. A first sealing ring 12a is provided in the first sealing groove 12, and the first sealing ring 12a can be an O-ring. When the valve core 4 moves in the direction close to the valve seat 1 and finally rests against the valve seat 1, the sealing ring seals the impact port 11, so that the impact air wave cannot pass into the pressure relief port 23. The rivet groove 13 will protrude a portion into the first sealing groove through the riveting process, and this portion can limit the first sealing ring 12a, and stick it in the first sealing groove 12 to prevent it from being blown out.

[0039] like Figure 3 As shown, in some embodiments of the present invention, the mounting seat 32 is provided with a limit groove 32b. The adjustment assembly 31 includes a limit screw sleeve 31a and an adjusting screw 31b; the portion of the adjusting screw 31b near the top of the valve body 2 has a limit block 31b1 arranged along the circumferential direction of the axis, the limit block 31b1 is embedded in the limit groove 32b, and the mounting seat 32 is fixedly connected to the valve body 2, so that the adjusting screw 31b is restricted and does not move in the axial direction; the limit screw sleeve 31a is threadedly connected to the adjusting screw 31b in the adjustment channel 32a and is close to the valve seat 1. The limit screw sleeve 31a can move to the maximum to support the limit block 31b1 when viewed in the horizontal direction. Therefore, the closer the limit groove 32b is to the upper surface of the inner wall of the valve body 2, the larger the movable range of the limit screw sleeve 31a is; the limit screw sleeve 31a is driven to reciprocate in the axial direction by rotating the adjusting screw 31b, that is, to reciprocate in the adjustment channel 32a of the mounting seat 32.

[0040] A buffer pad 31a1 is provided at one end of the limiting screw sleeve 31a close to the valve seat 1, and the edge of the buffer pad 31a1 does not exceed the limiting screw sleeve 31a, so that when the limiting screw sleeve 31a moves in the adjustment channel 32a, it will not be stuck on the mounting seat 32 due to the buffer pad 31a1 being too large, thereby affecting the operation of the entire pressure relief valve; when the valve core 4 moves in the direction away from the valve seat 1, it will eventually resist the limiting screw sleeve 31a, and then the buffer pad 31a1 is provided at the section where the limiting screw sleeve 31a contacts the valve core 4, so as to provide buffering for the movement of the valve core 4; this not only protects the valve core 4 and the limiting screw sleeve 31a, but also improves the stability of the pressure relief valve and reduces vibration.

[0041] In some embodiments of the present invention, the adjustment module 3 includes a locking assembly 33, which is connected to the adjusting screw 31b and is used to lock the adjusting screw 31b; the locking assembly 33 can use a spring washer, a locking nut, an anti-loosening glue or a stop gasket to ensure that the position of the adjusting screw 31b is fixed and will not shake or loosen during use. A locking nut is used for demonstration in the present invention.

[0042] Preferably, Figure 2 As shown, a second sealing groove group 24 and a spare groove 25 are provided on the inner wall of the valve body 2; a second sealing ring group 24a is provided in the second sealing groove group 24, and the second sealing ring group 24a can adopt a U-shaped sealing ring to increase the operating pressure. The multi-level sealing makes the sealing of the pressure relief valve better. The spare groove 25 can adopt a Gly ring, which helps the pressure relief valve to achieve a safer and more reliable high-pressure operating condition when the operating pressure of the second sealing groove group 24 is not enough to support the high pressure; a support groove 26 is provided on the inner wall of the valve body 2, and a support ring 26a is provided in the support groove 26. The support ring 26a is used to support the valve core 4 to ensure that the valve core 4 always maintains the correct axial position during the movement in the accommodating space 21, and also reduces the direct contact and friction between the valve core 4 and the inner wall of the valve body 2, thereby extending the service life.

[0043] Preferably, the impact port 11 has a certain inclination angle along the circumferential direction toward the upper surface of the valve seat 1; the protruding area 42 has an inclination from the center toward the surrounding area that matches the impact port 11; in this way, when the valve core 4 is against the valve seat 1, the first sealing ring 12a can better fit the valve core 4 and improve the sealing performance; and the inclination will also reduce the vibration caused by the valve core 4 hitting the valve seat 1, making the pressure relief valve more stable.

[0044] like Figure 5As shown, the initial state of the pressure relief valve is the closed state. High-pressure gas is introduced from the control air chamber inlet 22 and the pressure is kept constant, pushing the valve core 4 toward the valve seat 1. The protruding area 42 on the lower end surface of the valve core 4 approaches the valve seat 1 until the protruding area 42 tightly presses the valve seat 1. At this time, a part of the protruding area 42 exceeds the upper end surface of the valve seat 1 and enters the impact port 11. The first sealing ring 12a seals the impact port 11; the passage between the pressure relief port 23 and the impact port 11 is blocked, and the pressure relief stops. At this time, the pressure relief valve is in the closed state.

[0045] Please refer to Figure 4 When pressure relief is required, the force exerted by the high-pressure shock wave of the shock port 11 on the protruding area 42 gradually increases until it becomes greater than the force exerted by the high-pressure gas on the valve core 4 through the control air chamber inlet 22. The valve core 4 is then pushed by the high-pressure shock wave and moves away from the valve seat 1. After the valve core 4 no longer abuts the valve seat 1, the shock port 11 is connected to the pressure relief port 23, and the pressure relief port 23 begins to relieve pressure. At this time, the pressure relief valve is in the open state. When the valve core 4 moves to abut the adjustment component 31, the pressure relief amount of the pressure relief port 23 reaches the maximum.

[0046] By changing the pressure exerted on the valve core 4 by the high-pressure gas from the air inlet 22 of the control air chamber, the starting pressure for the pressure relief port 23, i.e., the force exerted by the high-pressure shock wave from the shock port 11 on the protruding area 42, can be changed. The lower the high-pressure gas pressure, the smaller the force required by the high-pressure shock wave to push the valve core 4.

[0047] When the pressure relief of the high-pressure shock wave decreases until it stops, the valve core 4 returns to the closed state under the action of the high-pressure gas introduced into the air inlet 22 of the control air cavity.

[0048] In some embodiments of the present invention, by rotating the adjusting screw 31b in the adjusting assembly 31, the limiting screw sleeve 31a moves toward the direction close to the valve seat 1, and the linear motion stroke of the valve core 4 in the accommodating space 21 becomes smaller; in this case, after the valve core 4 is against the adjusting assembly 31, the pressure relief port 23 is still partially blocked by the protruding area 42, and the pressure relief port 23 cannot fully relieve pressure, thereby achieving controllable pressure relief size.

[0049] Preferably, the recessed area 41 has a limiting angle 41a with a certain angle extending from the inner wall toward the outer wall at one end close to the regulating module 3; and an annular groove 27 is provided on the inner wall of the valve body 2 opposite to the limiting angle 41a; the limiting angle 41a makes the outer wall length of the recessed area 41 longer than the inner wall length. When the valve core 4 gradually approaches the valve body 2, the inner diameter wall of the annular groove 27 first contacts the slope of the limiting angle 41a, reducing the impact force caused by the collision between the valve core 4 and the valve body 2. Finally, the limiting angle 41a contacts the bottom of the annular groove 27, and the valve core 4 stops moving.

[0050] The above-mentioned inertial pressure relief valve structure with adjustable stroke has all its structures contained inside the valve body 2, so that the overall structure of the pressure relief valve is compact, saving installation space in actual use; and the design of controlling the pressure of the high-pressure gas from the outside to change the starting pressure of the pressure relief valve to enter the open state makes the use of the pressure relief valve more convenient.

[0051] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. An inertial pressure relief valve structure with adjustable stroke, characterized in that: include: A valve seat, wherein an impact port is formed in the center of the valve seat; The valve body is located above the valve seat, is fixedly connected to the valve seat, and has an accommodating space inside; a control air cavity air inlet is opened on one side of the valve body; and a pressure relief port is opened around the valve body near the valve seat; The regulating module includes a regulating assembly and a mounting seat; the mounting seat is fixedly connected to the top of the valve body, and the mounting seat has a regulating passage; the regulating assembly passes through the valve body and moves linearly in the regulating passage, moving toward or away from the valve seat; A valve core is disposed in the accommodating space; one end of the valve core is recessed inwardly to form a recessed area, and the other end of the valve core is protruded outwardly to form a protruding area; the contour of the recessed area is adapted to the mounting seat; and the protruding area faces the valve seat; The valve core performs linear motion in the accommodating space, moving toward or away from the valve seat.

2. The inertia pressure relief valve structure with adjustable stroke according to claim 1, characterized in that: A first sealing groove and a rivet groove are formed on the upper end surface of the valve seat. The rivet groove is closer to the valve body than the first sealing groove, and the rivet groove fits the first sealing groove. A first sealing ring is provided in the first sealing groove.

3. The inertia pressure relief valve structure with adjustable stroke according to claim 1, characterized in that: The mounting seat is provided with a limiting groove, and the adjustment assembly includes a limiting screw sleeve and an adjusting screw; the portion of the adjusting screw close to the top end of the valve body is provided with a limiting block arranged along the circumference of the axis, and the limiting block is embedded in the limiting groove, and the limiting screw sleeve is threadedly connected to the adjusting screw in the adjustment channel and close to the valve seat.

4. The inertia pressure relief valve structure with adjustable stroke according to claim 3, characterized in that: A buffer pad is provided at one end of the limiting screw sleeve close to the valve seat, and the edge of the buffer pad does not exceed the limiting screw sleeve, thereby providing buffering for the movement of the valve core.

5. The inertia pressure relief valve structure with adjustable stroke according to claim 3, characterized in that: The adjustment module includes a locking assembly connected to the adjustment screw.

6. The inertia pressure relief valve structure with adjustable stroke according to claim 1, characterized in that: A second sealing groove group and a spare groove are provided on the inner wall of the valve body; a second sealing ring group is arranged in the second sealing groove group; a supporting groove is provided on the inner wall of the valve body, a supporting ring is arranged in the supporting groove, and the supporting ring supports the valve core.

7. The inertia pressure relief valve structure with adjustable stroke according to claim 1, characterized in that: The impact port has a certain inclination angle along the circumferential direction toward the upper surface of the valve seat; and the protruding area has an inclination from the center toward the surroundings that matches the impact port.

8. The inertia pressure relief valve structure with adjustable stroke according to claim 2, characterized in that: High-pressure gas is introduced from the air inlet of the control air chamber to push the valve core toward the valve seat until the valve core presses the valve seat. At this time, the protruding area exceeds the upper end surface of the valve seat and enters the impact port. The first sealing ring seals the impact port; the pressure relief port stops relieving pressure.

9. The inertia pressure relief valve structure with adjustable stroke according to claim 8, characterized in that: When the force acting on the protruding area through the impact port is greater than the force acting on the valve core through the control air cavity air inlet, the valve core moves in a direction away from the valve seat, the impact port is connected to the pressure relief port, and the pressure relief port starts to relieve pressure.

10. The inertia pressure relief valve structure with adjustable stroke according to claim 1, characterized in that: The recessed area has a limiting angle with a certain angle extending from the inner wall toward the outer wall at one end close to the regulating module; and an annular groove is provided on the inner wall of the valve body opposite to the limiting angle.

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