Piston type pull rod pressure relief valve

Abstract

The utility model discloses a piston type pull rod pressure relief valve which comprises an air cylinder and a protective cover, a first flange is arranged on the side, facing the protective cover, of the air cylinder, a corresponding second flange is arranged on the protective cover, and a plurality of clamping devices are arranged between the first flange and the second flange in a clamping mode. The clamping device comprises a limiting buckle and an elastic piece, the limiting buckle is installed on the first flange in a telescopic mode, the elastic piece is arranged between the limiting buckle and the first flange, a positioning assembly is arranged on the second flange, and the positioning assembly is arranged on the limiting buckle in an inserted mode and clamped on one side of the limiting buckle in a clockwise rotating mode. In order to solve the problem, the piston type pull rod pressure relief valve has the advantage of being convenient to disassemble and assemble, and the problem that when the pressure relief valve is maintained in the later period, disassembly and assembly are not convenient is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a piston type pull rod pressure relief valve. Background Art

[0002] The pressure relief valve is usually installed on the outlet pipe of the air bag. The release pressure is determined according to the maximum working pressure of the air compressor. When the pressure in the air bag exceeds the pressure relief critical point of the pressure relief valve, the piston of the pressure relief valve will automatically open to achieve the purpose of releasing the pressure. The existing pressure relief valve is usually composed of a cylinder, a piston assembly and a protective cover. The pressure relief valve in the prior art has the disadvantage of being inconvenient to disassemble and assemble. When installing it, it is connected by bolts. When maintaining the pressure relief valve in the later stage, it is very troublesome to disassemble and install the parts on the pressure relief valve, which greatly increases the workload of the staff, makes it inconvenient for people to disassemble and assemble the pressure relief valve, and reduces the practicality of the pressure valve. Utility Model Content

[0003] In view of the above problems, the utility model provides a piston type pull rod pressure relief valve, which has the advantage of convenient disassembly and assembly, and solves the problem of inconvenient disassembly and assembly during later maintenance of the pressure relief valve.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a piston-type pull rod pressure relief valve, comprising a cylinder and a protective cover, the cylinder is provided with a first flange on the side facing the protective cover, the protective cover is provided with a corresponding second flange, a number of clamping devices are clamped between the first flange and the second flange, the clamping devices include a limit clip and an elastic member, the limit clip is telescopically installed on the first flange, the elastic member is arranged between the limit clip and the first flange, a positioning assembly is arranged on the second flange, the positioning assembly is plugged into the limit clip and rotated clockwise to clamp on one side of the limit clip, and a control assembly is extended from the limit clip toward the outer wall of the first flange.

[0005] By adopting the above technical solution, the elastic member is installed between the first flange and the limit buckle during installation, so that the limit buckle has a telescopic function. When the positioning component is inserted into the first flange, it abuts against the limit buckle and prompts the limit buckle to give way downward. The positioning component is then rotated clockwise and clamped on the first flange and located on one side of the limit buckle. At this time, the limit buckle can release the contraction pressure after the positioning component is rotated, thereby performing a reset operation and resetting to one side of the positioning component to form a limit abutment. During disassembly, the limit buckle is pressed down by the control component on one side to contact the limit abutment on one side of the positioning component. The protective cover can be removed after counterclockwise rotation. The overall structure has the advantage of convenient disassembly and assembly, which solves the problem of inconvenient disassembly and assembly during later maintenance of the pressure relief valve.

[0006] The utility model is further configured as follows: a clamping opening is provided on the first flange, a telescopic groove is provided on the bottom of the first flange on one side of the clamping opening, a limiting portion and an abutting portion are provided on the limiting buckle, the elastic member is installed in the telescopic groove, one end of the abutting portion is pressed against the elastic member, one end of the limiting portion is connected to the abutting portion, and the other end is arranged in the clamping opening.

[0007] By adopting the above technical solution, the limit buckle is pressed against the elastic member through the abutment portion to achieve telescopic cooperation, and the positioning component is inserted into the abutment portion through the clamping opening, so that the abutment can achieve downward contraction and give way through the elastic member, thereby rotating clockwise and clamping on the first flange.

[0008] The utility model is further configured that a positioning column is protruded at the bottom of the telescopic slot, a positioning groove is opened on the abutting portion toward the positioning column, one end of the elastic member is sleeved on the positioning column, and the other end is abutted in the positioning groove.

[0009] By adopting the above technical solution, the double-end fixation of the elastic member is achieved by using the positioning groove and the positioning column, thereby avoiding the problem of distortion and deformation of the overall stroke of the elastic member during the telescopic operation.

[0010] The utility model is further configured such that a rectangular through hole is provided on one side of the clamping opening, the control component includes a sliding portion and a connecting portion, the connecting portion is arranged in the rectangular through hole and one end is fixed on the limiting portion, and the sliding portion is vertically arranged on one side of the connecting portion and clamped on the outer wall of the first flange.

[0011] By adopting the above technical solution, the sliding part is used to slide up and down, and the connecting part transmits the force, so that the limit buckle can be extended and retracted up and down, which is convenient for disassembly during later maintenance.

[0012] The utility model is further configured that the sliding portion and the connecting portion are provided with communicating openings, and an arc-shaped flange is provided on one side of the outer wall of the sliding portion facing the first flange.

[0013] By adopting the above technical solution, a clearance opening is provided for the installation of the sliding part, which shrinks and makes way inwards during insertion, and when it is extended to the outer wall of the first flange, the contraction pressure is released to both sides and clamped.

[0014] The utility model is further configured that the positioning assembly includes positioning parts arranged in a ring array, and a plug interface adapted to the positioning parts is provided on one side of the clamping opening in the clockwise direction.

[0015] By adopting the above technical solution, the provided positioning part is used to form a snap connection with the plug-in interface after clockwise rotation. The plug-in interface plays a role of radial positioning and clockwise axial positioning for the positioning part, and the limit buckle forms a snap connection with the other side of the positioning part to play a role of axial positioning.

[0016] The utility model is further configured that rounded surfaces are provided on both sides of the limiting portion.

[0017] By adopting the above technical solution, the purpose of providing the chamfered surface is to prevent the abutting portion from interfering with the plug-in port during the telescopic operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the overall structure of the utility model;

[0019] Figure 2 It is a partial cross-sectional view of the utility model;

[0020] Figure 3 It is a partial exploded view of the utility model;

[0021] Figure 4 It is a schematic diagram of the structure of the limit buckle, elastic member and control assembly of the utility model.

[0022] In the figure, 1, cylinder; 2, protective cover; 3, first flange; 4, second flange; 5, clamping device; 8, limit buckle; 9, elastic member; 10, positioning assembly; 11, control assembly; 12, clamping opening; 13, telescopic slot; 14, positioning column; 15, positioning groove; 16, rectangular through hole; 17, sliding part; 18, connecting part; 19, clearance opening; 20, arc flange; 21, positioning part; 23, plug interface; 24, chamfered surface; 25, limit part; 26, abutment part. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example: As attached Figures 1 to 4A piston-type pull-rod pressure relief valve shown in the figure comprises a cylinder 1 and a protective cover 2, wherein the cylinder 1 is provided with a first flange 3 (an integrated structure) on the side facing the protective cover 2, and a corresponding second flange 4 (an integrated structure) is provided on the protective cover 2, and a plurality of clamping devices 5 (specifically, two to four groups) are clamped between the first flange 3 and the second flange 4, and the clamping devices 5 comprise a limit buckle 8 and an elastic member 9 (specifically, a pressure spring), and the limit buckle 8 is telescopically installed on the first flange 3, and the elastic member 9 is arranged between the limit buckle 8 and the first flange 3, and a positioning assembly 10 (an integrated structure) is arranged on the second flange 4, and the positioning assembly 10 is plugged on the limit buckle 8 and is clamped on one side of the limit buckle 8 by rotating clockwise, and the limit buckle 8 faces the first flange 3. A control component 11 is extended to one side of the outer wall. During installation, the elastic member 9 is installed between the first flange 3 and the limit buckle 8, so that the limit buckle 8 has a telescopic function. When the positioning component 10 is inserted into the first flange 3, it abuts against the limit buckle 8 and prompts the limit buckle 8 to give way downward. The positioning component 10 is rotated clockwise and clamped on the first flange 3 and is located on one side of the limit buckle 8. At this time, the limit buckle 8 can release the contraction pressure after the positioning component 10 is rotated, thereby performing a reset operation and resetting to one side of the positioning component 10 to form a limit abutment. During disassembly, the limit buckle 8 is pressed down by the control component on one side to contact the limit abutment on one side of the positioning component 10. The protective cover can be removed after counterclockwise rotation. The overall structure has the advantage of convenient disassembly and assembly, which solves the problem of inconvenient disassembly and assembly during later maintenance of the pressure relief valve.

[0025] As attached Figure 2 and attached Figure 3 As shown, a snap-in opening 12 is provided on the first flange 3, and a telescopic groove 13 is provided on the bottom of the first flange 3 on one side of the snap-in opening 12. A limiting portion 25 and an abutting portion 26 (an integrated structure) are provided on the limiting buckle 8. The elastic member 9 is installed in the telescopic groove 13, and one end of the abutting portion 26 is pressed against the elastic member 9. One end of the limiting portion 25 is connected to the abutting portion 26, and the other end is provided in the snap-in opening 12. The limiting buckle 8 abuts against the elastic member 9 through the abutting portion 26 to achieve telescopic cooperation. The positioning assembly 10 is inserted and arranged on the abutting portion 26 through the snap-in opening 12, so that the abutment can achieve downward contraction and give way through the elastic member 9, thereby rotating clockwise and being clamped on the first flange 3.

[0026] As attached Figure 2 and attached Figure 3As shown, a positioning column 14 (an integrated structure) is protruded at the bottom of the telescopic slot 13, and a positioning groove 15 is opened on the abutting portion 26 toward the positioning column 14. One end of the elastic member 9 is sleeved on the positioning column 14, and the other end is abutted in the positioning groove 15. The positioning groove 15 and the positioning column 14 are used to fix the two ends of the elastic member 9, so as to avoid the problem of distortion and deformation of the overall stroke of the elastic member 9 during the telescopic operation.

[0027] As attached Figure 2 and attached Figure 3 As shown, a rectangular through hole 16 (the height of which is higher than that of the sliding portion 17) is provided on one side of the snap-fit ​​opening 12, and the control assembly 11 includes a sliding portion 17 and a connecting portion 18 (which can be connected by screws or an integrated structure), and the connecting portion 18 is arranged in the rectangular through hole 16 and one end of which is fixed on the limiting portion 25, and the sliding portion 17 is vertically arranged on one side of the connecting portion 18 and clamped on the outer wall of the first flange 3, and the sliding portion 17 is used to slide up and down, and the connecting portion 18 transmits the force, so that the limiting buckle 8 can be extended and retracted up and down, which is convenient for disassembly during later maintenance.

[0028] As attached Figure 4 As shown, the sliding portion 17 and the connecting portion 18 are provided with communicating clearance openings 19, and the sliding portion 17 is provided with an arc-shaped flange 20 (an integrated structure) on the side of the outer wall of the first flange 3. The clearance opening 19 is provided for the installation of the sliding portion 17, which is contracted inwardly to make way when plugged in, and when extended to the outer wall of the first flange 3, the contraction pressure is released to both sides and clamped.

[0029] As attached Figure 3 As shown, the positioning assembly 10 includes positioning portions 21 (an integrated structure, with the specific number corresponding to the snap-in openings 12) arranged in a ring array, and a plug-in interface 23 adapted to the positioning portion 21 is provided on one side of the snap-in opening 12 in the clockwise direction. The positioning portion 21 is arranged to be snap-fitted with the plug-in interface 23 after clockwise rotation, and the plug-in interface 23 plays a role in radial positioning and clockwise axial positioning for the positioning portion 21, and the limit buckle 8 plays a role in axial positioning by snapping on the other side of the positioning portion 21.

[0030] As attached Figure 4 As shown, chamfered surfaces 24 are provided on both sides of the limiting portion 25. The purpose of providing the chamfered surfaces 24 is to prevent the abutting portion 26 from interfering with the plug-in port 23 during the telescopic operation.

[0031] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

Claims

1. A piston-type pull-rod pressure relief valve, comprising a cylinder (1) and a protective cover (2), characterized in that: The cylinder (1) is provided with a first flange (3) on the side facing the protective cover (2), and a corresponding second flange (4) is provided on the protective cover (2). A plurality of clamping devices (5) are clamped between the first flange (3) and the second flange (4), and the clamping devices (5) include a limit buckle (8) and an elastic member (9). The limit buckle (8) is telescopically mounted on the first flange (3), and the elastic member (9) is arranged between the limit buckle (8) and the first flange (3). A positioning component (10) is provided on the second flange (4), and the positioning component (10) is plugged on the limit buckle (8) and is rotated clockwise to clamp on one side of the limit buckle (8). A control component (11) is extended from the limit buckle (8) toward the outer wall of the first flange (3).

2. A piston-type tie rod pressure relief valve according to claim 1, characterized in that: The first flange (3) is provided with a snap-fit ​​opening (12); a telescopic groove (13) is provided at the bottom of the first flange (3) and located on one side of the snap-fit ​​opening (12); a limiting portion (25) and an abutting portion (26) are provided on the limiting buckle (8); the elastic member (9) is installed in the telescopic groove (13); one end of the abutting portion (26) is pressed against the elastic member (9); one end of the limiting portion (25) is connected to the abutting portion (26), and the other end is provided in the snap-fit ​​opening (12).

3. A piston-type tie rod pressure relief valve according to claim 2, characterized in that: A positioning column (14) is protruded from the bottom of the telescopic slot (13), a positioning groove (15) is provided on the abutting portion (26) facing the positioning column (14), one end of the elastic member (9) is sleeved on the positioning column (14), and the other end is abutted in the positioning groove (15).

4. A piston-type pull-rod pressure relief valve according to claim 2, characterized in that: A rectangular through hole (16) is provided on one side of the clamping opening (12); the control assembly (11) comprises a sliding portion (17) and a connecting portion (18); the connecting portion (18) is arranged in the rectangular through hole (16) and one end of the connecting portion (18) is fixed on the limiting portion (25); the sliding portion (17) is vertically arranged on one side of the connecting portion (18) and clamped on the outer wall of the first flange (3).

5. A piston-type tie rod pressure relief valve according to claim 4, characterized in that: The sliding portion (17) and the connecting portion (18) are provided with communicating clearance openings (19), and the sliding portion (17) is provided with an arc-shaped flange (20) on one side of the outer wall facing the first flange (3).

6. A piston-type tie rod pressure relief valve according to claim 2, characterized in that: The positioning assembly (10) comprises positioning portions (21) arranged in a ring array, and a plug interface (23) adapted to the positioning portions (21) is provided on one side of the clamping opening (12) in the clockwise direction.

7. A piston-type tie rod pressure relief valve according to claim 2, characterized in that: The limiting portion (25) has chamfered surfaces (24) on both sides.

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