A kind of anti-loosening silent check valve
By setting nut steps and iron core steps between the connection nut of the silent check valve and the blocking iron core, the problem of loosening of the silent check valve nut in the prior art is solved, and the stability and reliability of the valve are achieved.
Patent Information
- Application Number
- CN202421606347.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-07-09
AI Technical Summary
The existing silent check valve is prone to loosening of nuts when vibrating for a long time, resulting in unstable valves.
By providing nut steps and iron core steps between the connecting nut and the blocking iron core, the nut steps are locked in contact with the iron core steps after the piston rod extends and pushes the nut and the flexible barrier sleeve against the inner wall of the check valve, thereby fixing the position of the nut.
It effectively prevents the nut from loosening during long vibration, ensuring the stability and reliability of the valve.
Smart Images
Figure CN222717535U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of silent check valves, in particular to an anti-loosening silent check valve. Background Art
[0002] Silent check valve refers to a valve that automatically opens and closes the valve disc by the flow of the medium itself to prevent the backflow of the medium. It is also called non-return valve, one-way valve, reverse flow valve, and back pressure valve. Check valve is an automatic valve. Its main function is to prevent the backflow of the medium, prevent the pump and drive motor from reversing, and release the container medium. Check valve can also be used to provide supply to the auxiliary system where the pressure may rise to exceed the system pressure. Check valves can be mainly divided into swing check valves (rotating according to the center of gravity) and lift check valves (moving along the axis).
[0003] The common silent check valve at present has a nut that is fixed by the convex edge of the nut and the flexible barrier plug after the nut is locked. It is a combination of hard and soft surface locking. After the piston rod is extended to push the nut and the flexible barrier sleeve against the inner wall of the check valve, the soft flexible barrier plug rubber surface is locked with the hard convex edge of the nut and cannot resist the nut, so that the position of the nut is fixed. Long-term vibration of the valve will cause the nut to loosen. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides an anti-loosening silent check valve, which solves the problems mentioned in the above background.
[0005] The utility model provides the following technical solution: an anti-loosening silent check valve, comprising: a check valve body, a piston assembly is arranged inside the check valve body, a connecting nut is arranged at one end of the piston assembly, a barrier plug iron core is connected to the surface of the connecting nut, and a flexible barrier sleeve is connected to the surface of the barrier plug iron core;
[0006] The surfaces of the connecting nut are respectively provided with a clamping convex edge and a nut step, the surface of the clamping convex edge is connected to the surface of the flexible barrier sleeve, the inner wall of the barrier plug core is provided with a core step, and the surface of the nut step is connected to the surface of the core step.
[0007] Preferably, the piston assembly includes a fixed seat, a piston seat and a piston rod, the fixed seat is installed inside the check valve body, a plurality of support rods are evenly distributed on the surface of the piston seat, and the plurality of support rods are connected to the inner wall of the fixed seat, a guide tube is provided on the piston seat, a plurality of sliding sleeves are provided on the inner wall of the guide tube, and the plurality of sliding sleeves are connected to the surface of the piston rod.
[0008] Preferably, a hard support plate is provided on the top of the flexible barrier sleeve, a spring is sleeved on the surface of the guide tube, one end of the spring is connected to the top of the hard support plate, and the other end of the spring is connected to the inner wall of the piston seat.
[0009] Preferably, at least one cut surface is provided on the piston rod, and a gap channel is formed between the cut surface and the sliding sleeve.
[0010] Preferably, the inner wall of the connecting nut is provided with a mounting groove, and the inner wall of the mounting groove is provided with a sealing ring, and the inner wall of the sealing ring is connected to the surface of the piston rod.
[0011] Preferably, a gasket is provided at the bottom of the inner wall of the barrier plug core, and the surface of the gasket is connected to the bottom end of the piston rod.
[0012] Preferably, a support sleeve extending toward the flexible barrier sleeve is provided on the piston seat.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] The anti-loosening silent check valve is provided with a nut step and an iron core step. After the piston rod is extended to push the connecting nut and the flexible barrier sleeve against the inner wall of the check valve, the nut step of the connecting nut here contacts and locks with the iron core step of the barrier plug, which can press against the connecting nut and fix the position of the connecting nut. The connecting nut will not loosen during long-term vibration. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0016] Figure 2 It is a schematic diagram of the side section structure of the utility model;
[0017] Figure 3 This is a schematic diagram of the structure of the nut step position of the utility model;
[0018] Figure 4 This is a schematic diagram of the structure of the utility model at the step position of the iron core;
[0019] Figure 5 It is a structural schematic diagram of the section position of the piston rod of the utility model.
[0020] In the figure: 1. Check valve body; 2. Piston assembly; 21. Fixed seat; 22. Piston seat; 23. Piston rod; 24. Support rod; 25. Guide tube; 26. Sliding sleeve; 3. Connecting nut; 4. Barrier plug core; 5. Flexible barrier sleeve; 6. Pressing convex edge; 7. Nut step; 8. Core step; 9. Hard support plate; 10. Spring; 11. Cut surface; 12. Sealing ring; 13. Gasket; 14. Support sleeve. DETAILED DESCRIPTION
[0021] 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.
[0022] See also Figure 1-5 , an anti-loosening silent check valve, comprising: a check valve body 1, a piston assembly 2 is arranged inside the check valve body 1, a connecting nut 3 is arranged at one end of the piston assembly 2, a barrier plug iron core 4 is connected to the surface of the connecting nut 3, and a flexible barrier sleeve 5 is connected to the surface of the barrier plug iron core 4;
[0023] The surfaces of the connecting nut 3 are respectively provided with a clamping flange 6 and a nut step 7. The surface of the clamping flange 6 is connected to the surface of the flexible barrier sleeve 5. The inner wall of the barrier plug core 4 is provided with a core step 8. The surface of the nut step 7 is connected to the surface of the core step 8.
[0024] See also Figure 2 The piston assembly 2 includes a fixed seat 21, a piston seat 22 and a piston rod 23. The fixed seat 21 is installed inside the check valve body 1. A plurality of support rods 24 are evenly distributed on the surface of the piston seat 22, and the plurality of support rods 24 are connected to the inner wall of the fixed seat 21. A guide tube 25 is provided on the piston seat 22, and a plurality of sliding sleeves 26 are provided on the inner wall of the guide tube 25, and the plurality of sliding sleeves 26 are connected to the surface of the piston rod 23.
[0025] A hard support piece 9 is provided on the top of the flexible barrier sleeve 5, and a spring 10 is sleeved on the surface of the guide tube 25, and one end of the spring 10 is connected to the top of the hard support piece 9, and the other end of the spring 10 is connected to the inner wall of the piston seat 22. The piston rod 23 drives the barrier plug core 4 and the flexible barrier sleeve 5 to rise, thereby driving the hard support piece 9 to rise and compress the spring 10. When the piston rod 23 is extended, the spring 10 is reset, which assists in pushing the hard support piece 9 to move, thereby pushing the barrier plug core 4 and the flexible barrier sleeve 5 to reset.
[0026] See also Figure 5 At least one section 11 is provided on the piston rod 23, and a gap channel is formed between the section 11 and the sleeve 26. The use of the gap channel reduces the phenomenon of solid particles being embedded and blocked. On the other hand, it can effectively prevent large-area friction damage between the piston rod 23 and the sleeve 26, thereby extending the service life of the piston rod 23 and the sleeve 26 and reducing the maintenance frequency.
[0027] The inner wall of the connecting nut 3 is provided with a mounting groove, and the inner wall of the mounting groove is provided with a sealing ring 12, the inner wall of the sealing ring 12 is connected to the surface of the piston rod 23, a gasket 13 is provided at the bottom of the inner wall of the barrier plug core 4, the surface of the gasket 13 is connected to the bottom end of the piston rod 23, and a support sleeve 14 extending toward the flexible barrier sleeve 5 is provided on the piston seat 22. In the passage state, the flexible barrier sleeve 5 abuts against the support sleeve 14 to provide support for the flexible barrier sleeve 5.
[0028] After the piston rod 23 extends and pushes the connecting nut 3 to move, the connecting nut 3 pushes the barrier plug core 4 to move, and the barrier plug core 4 pushes the flexible barrier sleeve 5 to press against the inner wall of the check valve, the nut step 7 of the connecting nut 3 and the core step 8 of the barrier plug core 4 are in contact and locked with each other. The hard contact can press against the connecting nut 3, so that the position of the connecting nut 3 is fixed, and the connecting nut 3 will not loosen during long-term vibration.
[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An anti-loosening silent check valve, characterized in that: include: A check valve body (1), wherein a piston assembly (2) is arranged inside the check valve body (1), a connecting nut (3) is arranged at one end of the piston assembly (2), a barrier plug iron core (4) is connected to the surface of the connecting nut (3), and a flexible barrier sleeve (5) is connected to the surface of the barrier plug iron core (4); The surfaces of the connecting nut (3) are respectively provided with a clamping flange (6) and a nut step (7), the surface of the clamping flange (6) is connected to the surface of the flexible barrier sleeve (5), the inner wall of the barrier plug iron core (4) is provided with an iron core step (8), and the surface of the nut step (7) is connected to the surface of the iron core step (8).
2. The anti-loosening silent check valve according to claim 1, characterized in that: The piston assembly (2) comprises a fixed seat (21), a piston seat (22) and a piston rod (23); the fixed seat (21) is installed inside the check valve body (1); a plurality of support rods (24) are evenly distributed on the surface of the piston seat (22), and the plurality of support rods (24) are connected to the inner wall of the fixed seat (21); a guide tube (25) is provided on the piston seat (22); a plurality of sliding sleeves (26) are provided on the inner wall of the guide tube (25), and the plurality of sliding sleeves (26) are connected to the surface of the piston rod (23).
3. The anti-loosening silent check valve according to claim 2, characterized in that: A hard support plate (9) is arranged on the top of the flexible barrier sleeve (5), a spring (10) is sleeved on the surface of the guide tube (25), one end of the spring (10) is connected to the top of the hard support plate (9), and the other end of the spring (10) is connected to the inner wall of the piston seat (22).
4. The anti-loosening silent check valve according to claim 3, characterized in that: At least one cut surface (11) is provided on the piston rod (23), and a gap channel is formed between the cut surface (11) and the sliding sleeve (26).
5. The anti-loosening silent check valve according to claim 2, characterized in that: The inner wall of the connecting nut (3) is provided with a mounting groove, and the inner wall of the mounting groove is provided with a sealing ring (12), and the inner wall of the sealing ring (12) is connected to the surface of the piston rod (23).
6. The anti-loosening silent check valve according to claim 2, characterized in that: A gasket (13) is provided at the bottom of the inner wall of the barrier plug iron core (4), and the surface of the gasket (13) is connected to the bottom end of the piston rod (23).
7. The anti-loosening silent check valve according to claim 2, characterized in that: The piston seat (22) is provided with a support sleeve (14) extending towards the flexible barrier sleeve (5).