Non-retention check valve

Abstract

The non-retention check valve comprises a valve deck and a valve body, the valve body is connected with the valve deck and is limited and tightened through a bolt and a nut, a clamping assembly is arranged in the bolt in an inserted mode, and the clamping assembly comprises a positioning panel, a plurality of extending supporting feet and a plurality of clamping parts which are integrally formed. The positioning panel is arranged in the valve cover in an abutting mode, the extending supporting foot extends towards one side of the bolt, one end of the clamping portion is connected to the extending supporting foot, the other end of the clamping portion bends and extends towards one side of the threaded outer wall of the bolt and is clamped on the valve body, and the bolt is provided with a receding opening for the clamping portion to stretch out. The utility model aims to provide the non-retention check valve which prevents the bolt from loosening after being connected and fixed, has the advantage of stable connection, and solves the problem of leakage of the valve.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a non-retention check valve. Background Art

[0002] Check valves are commonly used in pipeline systems. The opening and closing of the valve disc is determined by the pressure difference between the inlet and outlet of the valve, thereby ensuring one-way transportation in the pipeline and blocking backflow in the pipeline. They have the characteristics of fast closing, low pressure loss and noise. The existing non-retention check valve is mainly composed of a valve body, a valve cover, a valve seat, a valve disc, a valve stem, a spring, etc. The valve body and the valve cover are often connected by bolts and nuts for limited tightening during the assembly process. Since the check valve will vibrate during operation, the nuts and bolts will become loose, resulting in the problem of position deviation of the valve body and the valve cover, causing valve body leakage, posing a greater safety hazard. Utility Model Content

[0003] In view of the above problems, the utility model provides a non-retention check valve, which prevents bolts from loosening after being connected and fixed, has the advantage of stable connection, and solves the problem of valve leakage.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a non-retention check valve, comprising a valve cover and a valve body, the valve body being connected to the valve cover and tightened by bolts and nuts, a clamping assembly being inserted inside the bolt, the clamping assembly comprising an integrally formed positioning panel, a plurality of extended legs and a plurality of clamping parts, the positioning panel being abutted against the inside of the valve cover, the extended legs extending toward one side of the bolt, one end of the clamping part being connected to the extended legs, and the other end being bent and extended toward one side of the threaded outer wall of the bolt and clamped to the valve body, the bolt being provided with a clearance opening for the clamping part to extend out.

[0005] By adopting the above technical scheme, during installation, the bolts and nuts are tightened to limit the valve body and the valve cover, and the clamping assembly is inserted downward into the nut, and the extended leg is compressed toward the side of the bolt axis until the clamping part reaches the specified clamping position, and the extended leg releases pressure toward the side of the threaded outer wall. After the compression force is released, the clamping part is clamped on the valve body, and at the same time, the positioning panel is tightened toward the side of the valve cover to achieve two-way positioning of the bolt. During disassembly, the nuts are removed in turn to squeeze the clamping part, forming the compression of the extended leg, and the separation of the clamping assembly is achieved, thereby removing the clamping assembly. The overall structure prevents the bolts from loosening after being connected and fixed, has the advantage of a stable connection, and solves the problem of valve leakage.

[0006] The utility model is further configured such that a first supporting portion is provided on the annular protrusion on the valve cover, a second supporting portion is symmetrically provided on the valve body, a mounting groove is provided on one side of the first supporting portion, a first threaded hole is provided on the mounting groove, and a second threaded hole corresponding to the first threaded hole is provided on the second supporting portion.

[0007] Through the above technical solution, the first support part and the second support part can form a connection between the valve body and the valve cover, and through the penetrating setting of the installation groove, the first threaded hole and the second threaded hole, a limited tightening between the bolt and the nut is formed.

[0008] The utility model is further configured that a limiting slot is provided on one side of the installation slot, and a positioning step is provided on one side of the second threaded hole.

[0009] Through the above technical solution, the positioning panel can be tightly pressed against the limiting slot, and the extended support leg can be clamped in the positioning step, thereby achieving a two-way positioning effect.

[0010] The utility model is further configured such that the thickness of the clamping portion is smaller than the height of the clearance opening, and a first gap is provided on a side of the clearance opening away from the clamping portion.

[0011] By adopting the above technical solution, the purpose of setting a first gap on the side away from the clamping part is that if the position of the first gap is located on the side of the clamping part close to the positioning panel, then if there is an error between the yield opening and the positioning step when the bolt is tightened, it will not be able to be clamped. At this time, the bolt is in a tightened state and cannot continue to move downward, resulting in installation failure. When the first gap is set on the side away from the clamping part, when there is a gap between the clamping position of the clamping part and the positioning step and they are not clamped, the existing gap can be eliminated by adding a gasket or a nut, so that the clamping part can be clamped on the positioning step.

[0012] The utility model is further configured that the positioning panel is provided with a yielding inclined surface on one side facing the bottom of the limiting slot, and the extending support leg is provided with a conical surface.

[0013] By adopting the above technical solution, the inclined surface on the positioning panel can avoid structural interference with the limiting slot during insertion. When disassembling the clamping assembly, the inward contraction of the extended leg is achieved by squeezing the clamping part. The conical surface can slowly release the tension of the extended leg when leaving the bolt, thereby playing a buffering role and avoiding the extended leg from breaking.

[0014] The utility model is further configured that a first chamfered surface is provided on one side of the clamping portion facing the threaded outer wall.

[0015] By adopting the above technical solution, providing the first chamfered surface can improve the smoothness of the insertion of the clamping part into the positioning step.

[0016] The utility model is further configured that the extending leg is connected to the clamping portion and is provided with a second rounded surface.

[0017] By adopting the above technical solution, providing the second chamfered surface can avoid scratches on workers during processing, thereby improving the aesthetics and neatness of the extended legs.

[0018] The utility model is further configured as follows: a gasket is arranged in the installation groove, a through hole is opened on the gasket, the bolt passes through the through hole in sequence and is screwed into the first threaded hole and the second threaded hole, and the nut is tightened on the bolt.

[0019] By adopting the above technical solution, the bolt passes through the gasket and the installation groove to form a clamping, and the plug-in position of the clearance opening and the positioning step is adjusted by installing the gasket, while the tightening force of the bolt is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the overall structure of the utility model;

[0021] Figure 2 It is a cross-sectional view of the bolt and the clamping assembly of the utility model;

[0022] Figure 3 It is a cross-sectional view from another perspective of the bolt and the clamping assembly of the utility model;

[0023] Figure 4 It is a cross-sectional view of the bolt structure of the utility model.

[0024] In the figure, 1 is the valve cover; 2 is the valve body; 3 is the bolt; 4 is the nut; 5 is the clamping assembly; 7 is the positioning step; 8 is the positioning panel; 9 is the extension leg; 10 is the clamping part; 11 is the limiting slot; 12 is the clearance opening; 13 is the first gap; 14 is the clearance slope; 15 is the conical surface; 16 is the first chamfered surface; 17 is the second chamfered surface; 18 is the first supporting part; 19 is the second supporting part; 20 is the mounting groove; 21 is the first threaded hole; 23 is the second threaded hole; 24 is the gasket; 25 is the through hole. DETAILED DESCRIPTION

[0025] 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.

[0026] Example: As attached Figures 1 to 4A non-retention check valve shown in the figure comprises a valve cover 1 and a valve body 2, wherein the valve body 2 is connected to the valve cover 1 and is limitedly tightened by bolts 3 and nuts 4, wherein a clamping assembly 5 is inserted inside the bolt 3, wherein the clamping assembly 5 comprises an integrally formed positioning panel 8, a plurality of extended legs 9 (two to four legs are provided, and gaps are provided between adjacent extended legs 9) and a plurality of clamping portions 10 (two to four legs are provided), wherein the positioning panel 8 is abutted against the inside of the valve cover 1, wherein the extended legs 9 are extended toward one side of the bolt 3, wherein one end of the clamping portion 10 is connected to the extended legs 9, and the other end is bent and extended toward one side of the threaded outer wall of the bolt 3 and clamped on the valve body 2, wherein the bolt 3 is provided with a clearance opening 12 for the clamping portion 10 to extend out, and the clamping portion 10 is installed. During installation, the bolts 3 and nuts 4 are tightened to limit the tightening of the valve body 2 and the valve cover 1. By inserting the clamping assembly 5 downward into the nut 4, the extended leg 9 is compressed toward the side of the axis of the bolt 3 until the clamping part 10 reaches the specified clamping position, and the extended leg 9 releases the pressure toward the side of the threaded outer wall. After the compression force is released, the clamping part 10 is clamped on the valve body 2, and the positioning panel 8 is simultaneously formed to limit the tightness against the side of the valve cover 1 to achieve two-way positioning of the bolt 3. During disassembly, the nuts 4 are removed in turn to extrude the clamping part 10, forming the compression of the extended leg 9, and realizing the separation of the clamping assembly 5 from the valve body 2, thereby removing the clamping assembly 5. The overall structure prevents the bolt 3 from loosening after being connected and fixed, has the advantage of a stable connection, and solves the problem of valve leakage.

[0027] As attached Figure 1 and attached Figure 2 As shown, the annular protrusion on the valve cover 1 is provided with a first support portion 18 (an integrated structure), and the valve body 2 is symmetrically provided with a second support portion 19 (an integrated structure), a mounting groove 20 is provided on one side of the first support portion 18, a first threaded hole 21 is provided on the mounting groove 20, and a second threaded hole 23 corresponding to the first threaded hole 21 is provided on the second support portion 19. The first support portion 18 and the second support portion 19 can form a connection between the valve body 2 and the valve cover 1, and a limited tightening between the bolt 3 and the nut 4 is formed by the penetration of the mounting groove 20, the first threaded hole 21 and the second threaded hole 23.

[0028] As attached Figure 2 As shown, a limiting slot 11 is provided on one side of the installation slot 20, and a positioning step 7 is provided on one side of the second threaded hole 23. The positioning panel 8 can be tightly pressed into the limiting slot 11, and the extended leg 9 can be clamped into the positioning step 7, thereby achieving a two-way positioning effect.

[0029] As attached Figure 2As shown, the thickness of the clamping portion 10 is less than the height of the relief opening 12. A first gap 13 is provided on the side of the relief opening 12 away from the clamping portion 10. The purpose of providing the first gap 13 on the side away from the clamping portion 10 is that if the position of the first gap 13 is on the side of the clamping portion 10 close to the positioning panel 8, then if there is an error between the relief opening 12 and the positioning step 7 when the bolt 3 is in the tightened state, it will not be able to be clamped. At this time, the bolt 3 is in the tightened state and cannot move downward continuously, resulting in an installation failure. When the first gap 13 is provided on the side away from the clamping portion 10, when there is a gap between the clamping position of the clamping portion 10 and the positioning step 7 and it is not tightly clamped, the existing gap can be eliminated by adding a gasket 24 or a nut 4, so that the clamping portion 10 can be tightly clamped on the positioning step 7.

[0030] As shown in the attached Figure 2 figure, a relief inclined surface 14 is provided on the side of the positioning panel 8 facing the bottom of the limit card slot 11. A conical surface 15 is provided on the extension leg 9 (the conical surface 15 is annularly formed on the outer peripheral surface of the extension leg 9 and gradually narrows inward). The relief inclined surface 14 provided on the positioning panel 8 can avoid structural interference with the limit card slot 11 during insertion. When disassembling the clamping assembly 5, by squeezing the clamping portion 10, the inward contraction of the extension leg 9 is realized. The provision of the conical surface 15 can allow the extension leg 9 to slowly release the tension when leaving the inside of the bolt 3, playing a buffering role, thereby avoiding the extension leg 9 from breaking.

[0031] As shown in the attached Figure 2 and the attached Figure 3 figure, a first rounded surface 16 is provided on the side of the clamping portion 10 facing the outer wall of the thread. The provision of the first rounded surface 16 can improve the smoothness when the clamping portion 10 is inserted into the positioning step 7.

[0032] As shown in the attached Figure 2 figure, a second rounded surface 17 is provided at the connection of the extension leg 9 and the clamping portion 10. The provision of the second rounded surface 17 can avoid scratching of the operator during processing and improve the aesthetics and neatness of the extension leg 9.

[0033] As shown in the attached Figure 2 figure, a gasket 24 is provided in the installation groove 20. A through hole 25 is opened on the gasket 24. The bolt 3 passes through the through hole 25 in sequence and is tightened in the first threaded hole 21 and the second threaded hole 23. The nut 4 is tightened on the bolt 3. The bolt 3 passes through the gasket 24 and forms a tight connection with the installation groove 20. By installing and adjusting the gasket 24, the insertion position between the relief opening 12 and the positioning step 7 is adjusted, and at the same time, the tightening force of the bolt 3 is increased.

[0034] In the present utility model, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only relationship terms determined for the convenience of describing the structural relationship of each component or element of the present utility model, and do not specifically refer to any component or element in the present utility model, and should not be construed as a limitation to the present utility model.

Claims

1. A non-stagnant check valve, comprising a valve cover (1) and a valve body (2), wherein the valve body (2) is connected to the valve cover (1) and is limited and tightened by bolts (3) and nuts (4), and is characterized in that: A clamping assembly (5) is inserted into the bolt (3), and the clamping assembly (5) includes an integrally formed positioning panel (8), a plurality of extended legs (9) and a plurality of clamping parts (10). The positioning panel (8) is abutted against the inside of the valve cover (1), and the extended legs (9) are extended toward one side of the bolt (3). One end of the clamping part (10) is connected to the extended legs (9), and the other end is bent and extended toward the threaded outer wall of the bolt (3) and clamped on the valve body (2). The bolt (3) is provided with a clearance opening (12) for the clamping part (10) to extend out.

2. The non-retention check valve according to claim 1, wherein: The valve cover (1) is provided with a first supporting portion (18) on an annular protrusion, and the valve body (2) is symmetrically provided with a second supporting portion (19), one side of the first supporting portion (18) is provided with a mounting groove (20), the mounting groove (20) is provided with a first threaded hole (21), and the second supporting portion (19) is provided with a second threaded hole (23) corresponding to the first threaded hole (21).

3. The non-retention check valve according to claim 2, characterized in that: A limiting slot (11) is provided on one side of the installation slot (20), and a positioning step (7) is provided on one side of the second threaded hole (23).

4. The non-retention check valve according to claim 1, wherein: The thickness of the clamping portion (10) is smaller than the height of the clearance opening (12), and a first gap (13) is provided on a side of the clearance opening (12) away from the clamping portion (10).

5. The non-retention check valve according to claim 1, characterized in that: The positioning panel (8) is provided with a relief inclined surface (14) on one side facing the bottom of the limiting slot (11), and the extending support leg (9) is provided with a conical surface (15).

6. The non-retention check valve according to claim 1, wherein: The clamping portion (10) is provided with a first rounded surface (16) on the side facing the positioning step (7).

7. The non-retention check valve according to claim 1, characterized in that: The extended support leg (9) is connected to the clamping portion (10) and is provided with a second rounded surface (17).

8. The non-retention check valve according to claim 2, characterized in that: A gasket (24) is arranged in the installation groove (20), and a through hole (25) is provided in the gasket (24). The bolt (3) passes through the through hole (25) in sequence and is screwed into the first threaded hole (21) and the second threaded hole (23), and the nut (4) is screwed onto the bolt (3).

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