Safety valve for pressure relief and pressure maintaining of air bag

Abstract

The utility model discloses a safety valve used for pressure relief and pressure maintaining of an air pocket, which comprises a shell, a valve core, an adjusting spring and an adjusting assembly, a cavity is arranged in the shell, the valve core, the adjusting spring and the adjusting assembly are arranged in the cavity, the valve core, the adjusting spring and the adjusting assembly are arranged in an arrayed mode, and the valve core is arranged in the cavity. One end of the shell is provided with an air inlet communicated with the cavity, the side wall of the shell is provided with a pressure relief opening communicated with the cavity, the valve element is inserted into the air inlet in a sliding mode, the inner end of the valve element abuts against the side wall of the cavity, an annular groove is formed in the circumferential side of the valve element in the circumferential direction, and a sealing piece is fixedly arranged in the annular groove in a sleeved mode. The sealing piece comprises an outer ring and an inner ring, the inner circumferential side of the outer ring abuts against the outer circumferential side of the inner ring, and two annular elastic pieces are arranged on the outer circumferential side of the inner ring. The valve element has the effect of improving the sealing performance between the valve element and the air inlet.

Description

Technical Field

[0001] The present application relates to the technical field of safety valves, and in particular to a safety valve for relieving and maintaining pressure in an air bag. Background Art

[0002] A safety valve is a special valve whose opening and closing parts are in a normally closed state under the action of external force. When the medium pressure in the equipment or pipeline rises above the specified value, the medium is discharged to the outside of the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value. According to the existing technology patent, the name is a safety valve (CN201911310739.1). One end of the plunger in the safety valve abuts against the inlet of the shell under the action of the elastic component, thereby blocking the inlet of the safety valve. Since the contact area between one end of the plunger and the inlet is small, the sealing between the plunger and the inlet is low, and under long-term use, one end of the plunger and the inlet of the shell will be worn. When the pressure of the equipment or pipeline gradually increases, the gas in the equipment or pipeline will leak into the shell through between one end of the plunger and the inlet of the shell, making the safety valve unable to operate normally. Utility Model Content

[0003] The purpose of the utility model is to provide a safety valve for relieving and maintaining pressure of an air bag in response to the defects and shortcomings of the existing technology.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The valve core comprises a shell, a valve core, an adjusting spring and an adjusting assembly, wherein the shell has a cavity, the valve core, the adjusting spring and the adjusting assembly are located in the cavity, the valve core, the adjusting spring and the adjusting assembly are arranged in an array, one end of the shell has an air inlet connected to the cavity, the side wall of the shell has a pressure relief port connected to the cavity, the valve core is inserted and slid into the air inlet, the inner end of the valve core abuts against the side wall of the cavity, an annular groove is provided on the circumferential side of the valve core, a sealing member is fixedly mounted in the annular groove, the sealing member comprises an outer ring and an inner ring, the inner circumference of the outer ring abuts against the outer circumference of the inner ring, and the outer circumference of the inner ring has two annular spring pieces.

[0006] Preferably, a guide rod is provided at the outer end of the valve core, and a stabilizing sleeve for sliding and inserting the guide rod is provided inside the outer end of the air inlet, and a gap is provided between the stabilizing sleeve and the side wall of the air inlet.

[0007] Preferably, a spring seat is provided at the inner end of the valve core, and one end of the regulating spring is sleeved and fixed to one end of the spring seat.

[0008] Preferably, the adjustment assembly includes an adjusting bolt, a positioning block and an adjusting plate. The positioning block is fixed to the end of the shell away from the air inlet. The adjusting bolt is rotatably connected to the positioning block. The adjusting plate is threadedly connected to the circumferential side of the adjusting bolt. One end of the adjusting spring abuts against one side of the adjusting plate.

[0009] Preferably, a rotation groove is provided on the circumferential side of the adjusting bolt, and the rotation of the positioning block is restricted within the rotation groove.

[0010] Preferably, a plurality of guide strips are provided on the circumferential side of the cavity, and a plurality of sliding grooves for the guide strips to be inserted and slid are provided on the circumferential side of the adjustment plate.

[0011] Preferably, a countersunk hole is provided at one end of the shell, and the positioning block is located in the countersunk hole.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] 1. The valve core in the safety valve is slidably inserted into the air inlet, and the seal is located in the ring groove. The two annular springs on the outside of the inner ring push the outer ring outward, so that the outer circumference of the outer ring is tightly attached to the side wall of the air inlet, improving the sealing between the valve core and the air inlet;

[0014] 2. When encountering different pressure requirements, turn the adjusting bolt. Under the threaded fit between the adjusting bolt and the adjusting piece, let the adjusting piece slide in the cavity to adjust the distance between the adjusting piece and the valve core, thereby adjusting the elastic force of the adjusting spring and changing the adjustment value of the safety valve;

[0015] 3. When the adjusting piece slides in the cavity, the cooperation between the guide strip and the slide groove allows the adjusting piece to slide stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional schematic diagram of the safety valve of the utility model;

[0017] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 It is a structural schematic diagram of the regulating piece of the utility model.

[0019] In the figure: 1. Housing; 2. Valve core; 3. Adjusting spring; 4. Adjusting assembly; 5. Cavity; 6. Air inlet; 7. Pressure relief port; 8. Guide rod; 9. Stabilizing sleeve; 10. Ring groove; 11. Seal; 12. Outer ring; 13. Inner ring; 14. Ring spring; 15. Spring seat; 16. Adjusting bolt; 17. Positioning block; 18. Adjusting plate; 19. Countersunk hole; 20. Guide strip; 21. Slide groove; 22. Rotating groove. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] The embodiment of the present application discloses a safety valve for relieving and maintaining pressure of an air bag.

[0022] Reference Figure 1 and Figure 2 , including a shell 1, a valve core 2, an adjusting spring 3 and an adjusting component 4. The shell 1 has a cavity 5, one end of the cavity 5 is in an open state, the shell 1 is provided with an air inlet 6 at the end away from the opening of the cavity 5, and the side wall of the shell 1 is provided with a pressure relief port 7. The air inlet 6 and the pressure relief port 7 respectively connect the outside with the cavity 5 of the shell 1. The adjusting component 4 is located in the opening of the cavity 5, the valve core 2 is inserted and slidably moved in the air inlet 6, the vertical section of the valve core 2 is in a "convex" shape, and the adjusting spring 3 is located between the adjusting component 4 and the valve core 2.

[0023] A guide rod 8 is integrally provided at the outer end of the valve core 2, and a stabilizing sleeve 9 is coaxially placed inside the outer end of the air inlet 6. The guide rod 8 is inserted and slid into the stabilizing sleeve 9. Two connecting strips are evenly and integrally provided on the outer peripheral side of the stabilizing sleeve 9, and the outer side of the connecting strip is integrally provided on the side wall of the air inlet 6.

[0024] An annular groove 10 is formed circumferentially on the outer circumference of the valve core 2. A sealing member 11 is sleeved within the annular groove 10. The sealing member 11 comprises an outer ring 12 and an inner ring 13. The outer ring 12 is sleeved onto the outer circumference of the inner ring 13. The vertical cross-section of the outer ring 12 is a "U" shape with two opposing openings. The vertical cross-section of the inner ring 13 is a "U" shape with two opposing openings. The outer circumference of the inner ring 13 is provided with two annular spring plates 14, and the inner circumference of the inner ring 13 covers the outer sides of the two annular spring plates 14. The sealing member 11 is located within the annular groove 10. The two annular spring plates 14 on the outer sides of the inner ring 13 push the outer ring 12 outward, thereby tightly contacting the outer circumference of the outer ring 12 with the side wall of the air inlet 6, thereby improving the sealing between the valve core 2 and the air inlet 6.

[0025] A spring seat 15 is fixedly mounted on the inner end of the valve core 2 . The vertical section of the spring seat 15 is in a convex shape. One end of the regulating spring 3 is sleeved and fixed on one end of the spring seat 15 .

[0026] The adjusting assembly 4 includes an adjusting bolt 16, a positioning block 17 and an adjusting plate 18. A countersunk hole 19 is provided at one end of the shell 1 at the opening of the cavity 5. The positioning block 17 is embedded in the countersunk hole 19 and fixed by a bolt. The outer wall of the positioning block 17 is flush with the outer end face of the shell 1. A rotation groove 22 is provided circumferentially on the circumferential side of the adjusting bolt 16. Rotating holes are provided on the corresponding two sides of the positioning block 17. The rotation of the rotating hole is limited in the rotation groove 22. The side walls of the rotating groove 22 and the side walls of the positioning block 17 abut against each other. The threaded end of the adjusting bolt 16 is located in the cavity 5, and the adjusting plate 18 is threadedly sleeved on the circumferential side of the adjusting bolt 16. The adjusting spring 3 abuts against the side wall of the adjusting plate 18 at the end away from the spring seat 15. By rotating the adjusting bolt 16 and threadedly fitting the adjusting bolt 16 with the adjusting piece 18, the adjusting piece 18 can be allowed to slide in the cavity 5 to adjust the distance between the adjusting piece 18 and the valve core 2, thereby adjusting the elastic force of the adjusting spring 3 and changing the adjustment value of the safety valve.

[0027] Reference Figure 1 and Figure 3 The inner circumference of the cavity 5 is uniformly provided with a plurality of guide strips 20, and the circumference of the adjusting piece 18 is provided with a plurality of sliding grooves 21 for the sliding of the guide strips 20. When the adjusting piece 18 slides in the cavity 5, the mutual cooperation between the guide strips 20 and the sliding grooves 21 allows the adjusting piece 18 to slide stably.

[0028] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present invention patent application are included in the scope of the present invention patent application.

Claims

1. A safety valve for air bag pressure relief and pressure maintenance, comprising a housing (1), a valve core (2), an adjusting spring (3) and an adjusting assembly (4), wherein the housing (1) has a cavity (5), the valve core (2), the adjusting spring (3) and the adjusting assembly (4) are located in the cavity (5), the valve core (2), the adjusting spring (3) and the adjusting assembly (4) are arranged in an array, one end of the housing (1) has an air inlet (6) communicating with the cavity (5), and a side wall of the housing (1) has a pressure relief port (7) communicating with the cavity (5), characterized in that: The valve core (2) is inserted and slidably moved in the air inlet (6), the inner end of the valve core (2) abuts against the side wall of the cavity (5), and a ring groove (10) is provided on the circumferential side of the valve core (2). A sealing member (11) is fixedly mounted in the ring groove (10), and the sealing member (11) includes an outer ring (12) and an inner ring (13). The inner circumference of the outer ring (12) abuts against the outer circumference of the inner ring (13), and the outer circumference of the inner ring (13) has two annular spring pieces (14).

2. A safety valve for air bag pressure relief and pressure maintenance according to claim 1, characterized in that: A guide rod (8) is provided at the outer end of the valve core (2), and a stabilizing sleeve (9) for sliding insertion of the guide rod (8) is provided inside the outer end of the air inlet (6), with a gap being provided between the stabilizing sleeve (9) and the side wall of the air inlet (6).

3. A safety valve for air bag pressure relief and pressure maintenance according to claim 1, characterized in that: A spring seat (15) is provided at the inner end of the valve core (2), and one end of the regulating spring (3) is sleeved and fixed to one end of the spring seat (15).

4. A safety valve for air bag pressure relief and pressure maintenance according to claim 1, characterized in that: The adjustment assembly (4) includes an adjustment bolt (16), a positioning block (17) and an adjustment plate (18), wherein the positioning block (17) is fixed to an end of the housing (1) away from the air inlet (6), the adjustment bolt (16) is rotatably connected to the positioning block (17), the adjustment plate (18) is threadedly connected to the peripheral side of the adjustment bolt (16), and one end of the adjustment spring (3) abuts against one side of the adjustment plate (18).

5. A safety valve for air bag pressure relief and pressure maintenance according to claim 4, characterized in that: A rotation groove (22) is provided on the circumferential side of the adjusting bolt (16), and the positioning block (17) is restricted in rotation within the rotation groove (22).

6. A safety valve for air bag pressure relief and pressure maintenance according to claim 4, characterized in that: A plurality of guide strips (20) are provided on the circumferential side of the cavity (5), and a plurality of sliding grooves (21) for the guide strips (20) to be inserted and slid are provided on the circumferential side of the adjustment piece (18).

7. A safety valve for air bag pressure relief and pressure maintenance according to claim 4, characterized in that: A countersunk hole (19) is provided at one end of the housing (1), and the positioning block (17) is located in the countersunk hole (19).

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