Check valve with buffering function

Abstract

The check valve with the buffering function comprises a valve body, a connecting base is fixed to the inner wall of the valve body, a first compression spring is fixed to the surface of the connecting base, a mounting base is fixed to one end of the first compression spring, a spherical valve clack is connected to the inner wall of the mounting base in a sliding mode, and a valve seat is connected to the surface of the spherical valve clack in a sliding mode. A limiting plate, an extending plate and a baffle are fixed to the inner wall of the valve body, the valve seat is slidably connected with the right end face of the limiting plate and the inner wall of the extending plate, a protruding plate is fixed to the surface of the valve seat, a second compression spring is fixed to the surface of the protruding plate, and one end of the second compression spring is fixedly connected with the surface of the baffle. Two rack plates are fixed to the surface of the protruding plate, an air bag is fixed to one end of each rack plate, and the surface of each air bag is fixedly connected with the surface of the corresponding extending plate. The utility model has the advantages that when the valve clack is quickly contacted with the valve seat, the valve seat can obtain a buffering effect, and the valve seat is prevented from being abraded too early.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a check valve with a buffering function. Background Art

[0002] A check valve is a valve that automatically opens and closes its disc based on the flow of the medium itself, preventing the backflow of the medium. It is also known as a non-return valve, one-way valve, reverse flow valve, or back-pressure valve. A check valve is an automatic valve whose primary functions are to prevent the backflow of the medium, reverse rotation of the pump and drive motor, and release of the medium from the container.

[0003] A check valve typically consists of a disc and a spring. The spring's elastic force on the disc presses it against the valve seat, creating a seal. When liquid flows in a positive direction within the valve body, and the impact force of the liquid is greater than the spring's elastic force, the disc separates from the valve seat, closing the check valve. When the positive flow of liquid in the valve body weakens or stops, the disc quickly contacts the valve seat under the spring's elastic force, closing the check valve. However, at the moment the disc closes, the disc's sealing surface significantly impacts the valve seat's sealing surface within the valve body, causing premature and rapid wear of the sealing surface, shortening the check valve's service life. Utility Model Content

[0004] The purpose of the utility model is to provide a check valve with a buffering function, which has the advantage that when the valve disc quickly contacts the valve seat, the valve seat can obtain a buffering effect to avoid premature wear of the valve seat.

[0005] The cam is fixedly mounted on the valve body, and the cam is fixedly mounted on the valve body, wherein the cam is fixedly mounted on the valve body, wherein the cam is fixedly mounted on the valve body, wherein the cam is fixedly mounted on the valve body.

[0006] As a preferred check valve with a buffering function of the utility model, the buffer structure on the rotating shaft surface includes a limit block and a gear, the limit block and the gear are fixedly connected to the surface of the rotating shaft, the gear is engaged with the surface of the rack plate, a torsion spring is fixed on the surface of the limit block, and one end of the torsion spring is fixedly connected to the inner wall of the valve body.

[0007] As a preferred check valve with a buffering function of the present invention, the number of the second compression springs is six, and the second compression springs are distributed in a circular equidistant array on the surface of the convex plate.

[0008] As a preferred check valve with a buffering function of the present invention, a telescopic rod is provided inside the second compression spring, one end of the telescopic rod is fixedly connected to the surface of the convex plate, and the other end of the telescopic rod is fixedly connected to the surface of the baffle.

[0009] As a preferred check valve with a buffering function of the present invention, a plurality of mounting grooves are provided on the surface of the extension plate, a sealing ring is fixed on the inner wall of the mounting groove, and the surface of the sealing ring is slidably connected to the surface of the valve seat.

[0010] As a preferred check valve with a buffering function of the present invention, a guide mark is provided on the surface of the valve body.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] In the utility model, liquid enters through the right side of the valve body, the liquid can break open the spherical valve disc, and is normally transported through the mounting seat and the connecting seat, causing the first compression spring to compress, and at the same time the limit plate will limit the valve seat to prevent the valve seat from moving toward the left side of the valve body. When the liquid stops being transported, the first compression spring resets to cause the mounting seat to hit the surface of the valve seat. When the valve seat is hit, the valve seat will slide on the inner wall of the extension plate, and at the same time the second compression spring will be compressed to cushion part of the impact on the valve seat, and the rack plate will also move toward the direction of the extension plate, so that the airbag can also be compressed, thereby further absorbing the impact force on the valve seat, and the buffer structure can further absorb the impact force, so that the valve seat is not easily damaged when hit, thereby improving the service life of the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the partial cross-sectional structure of the utility model;

[0016] Figure 4 It is a schematic diagram of the local structure of the utility model;

[0017] Figure 5 For this utility model Figure 4 A in the figure is an enlarged structural diagram.

[0018] In the figure: 1. valve body; 2. connecting seat; 3. first compression spring; 4. mounting seat; 5. spherical valve disc; 6. limit plate; 7. valve seat; 8. extension plate; 9. convex plate; 10. second compression spring; 11. baffle; 12. rack plate; 13. airbag; 14. rotating shaft; 15. gear; 16. limit block; 17. torsion spring; 18. telescopic rod; 19. sealing ring; 20. guide mark. DETAILED DESCRIPTION

[0019] See also Figure 1-5 , a check valve with a buffering function, comprising a valve body 1, a connecting seat 2 is fixed to the inner wall of the valve body 1, a first compression spring 3 is fixed to the surface of the connecting seat 2, one end of the first compression spring 3 is fixed to the mounting seat 4, the inner wall of the mounting seat 4 is slidably connected with a spherical valve disc 5, the surface of the spherical valve disc 5 is slidably connected with the valve seat 7, a limit plate 6, an extension plate 8 and a baffle 11 are fixed to the inner wall of the valve body 1, the valve seat 7 is slidably connected to the right end face of the limit plate 6, the valve seat 7 is slidably connected to the inner wall of the extension plate 8, a convex plate 9 is fixed on the surface of the valve seat 7, a second compression spring 10 is fixed on the surface of the convex plate 9, one end of the second compression spring 10 is fixedly connected to the surface of the baffle 11, two rack plates 12 are fixed on the surface of the rack plate 12, an air bag 13 is fixed to one end of the rack plate 12, the surface of the air bag 13 is fixedly connected to the surface of the extension plate 8, the surface of the extension plate 8 is rotatably connected with a rotating shaft 14, one end of the rotating shaft 14 is rotatably connected to the inner wall of the valve body 1, and a buffer structure is installed on the surface of the rotating shaft 14;

[0020] The liquid enters through the right side of the valve body 1, and the liquid can break open the spherical valve disc 5 and be normally transported through the mounting seat 4 and the connecting seat 2, causing the first compression spring 3 to be compressed. At the same time, the limit plate 6 will limit the valve seat 7 to prevent the valve seat 7 from moving toward the left side of the valve body 1. When the liquid stops being transported, the first compression spring 3 resets and causes the mounting seat 4 to hit the surface of the valve seat 7. When the valve seat 7 is hit, the valve seat 7 will slide on the inner wall of the extension plate 8. At the same time, the second compression spring 10 will be compressed to buffer part of the impact on the valve seat 7, and the rack plate 12 will also move toward the direction of the extension plate 8, so that the airbag 13 can also be compressed, thereby further absorbing the impact force on the valve seat 7, and the buffer structure can further absorb the impact force, so that the valve seat 7 is not easily damaged when hit, thereby improving the service life of the valve seat 7.

[0021] Furthermore, the surface buffer structure of the rotating shaft 14 includes a limit block 16 and a gear 15. The limit block 16 and the gear 15 are fixedly connected to the surface of the rotating shaft 14. The gear 15 is engaged with the surface of the rack plate 12. A torsion spring 17 is fixed to the surface of the limit block 16. One end of the torsion spring 17 is fixedly connected to the inner wall of the valve body 1.

[0022] When the valve seat 7 is impacted by the mounting seat 4 and moves toward the extension plate 8, the rack plate 12 will drive the gear 15 to rotate, so that the rotating shaft 14 can also rotate together. At this time, the limit block 16 will drive the torsion spring 17 to rotate, and the torsion spring 17 can use its own elastic potential energy to disperse the torsion force during rotation, thereby further improving the buffering effect of the valve seat 7.

[0023] Furthermore, the number of the second compression springs 10 is six, and the second compression springs 10 are distributed in an annular equidistant array on the surface of the convex plate 9;

[0024] By disposing the second compression springs 10 , when the valve seat 7 is subjected to force, the pressure can be more evenly distributed to the multiple second compression springs 10 , thereby avoiding the tilting of the valve seat 7 due to uneven force.

[0025] Furthermore, a telescopic rod 18 is provided inside the second compression spring 10, one end of the telescopic rod 18 is fixedly connected to the surface of the convex plate 9, and the other end of the telescopic rod 18 is fixedly connected to the surface of the baffle 11;

[0026] The telescopic rod 18 can provide a linear guide for the valve seat 7 so that the valve seat 7 can only move in a linear direction, thereby ensuring that the rack plate 12 can normally engage with the gear 15 .

[0027] Furthermore, a plurality of mounting grooves are formed on the surface of the extension plate 8, and a sealing ring 19 is fixed to the inner wall of the mounting groove. The surface of the sealing ring 19 is in sliding connection with the surface of the valve seat 7;

[0028] The sealing ring 19 can improve the sealing performance between the surface of the valve seat 7 and the contact surface of the extension plate 8 , thereby preventing liquid from penetrating into the inner side of the valve seat 7 and the extension plate 8 .

[0029] Furthermore, a guide mark 20 is provided on the surface of the valve body 1;

[0030] By setting the guide mark 20, the correct installation direction can be clearly indicated, thereby avoiding valve failure or damage caused by installation errors.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A check valve with a buffering function, comprising a valve body (1), characterized in that: The inner wall of the valve body (1) is fixed with a connecting seat (2), the surface of the connecting seat (2) is fixed with a first compression spring (3), one end of the first compression spring (3) is fixed with a mounting seat (4), the inner wall of the mounting seat (4) is slidably connected with a spherical valve flap (5), the surface of the spherical valve flap (5) is slidably connected with a valve seat (7), the inner wall of the valve body (1) is fixed with a limit plate (6), an extension plate (8) and a baffle (11), the valve seat (7) is slidably connected to the right end face of the limit plate (6), the valve seat (7) is slidably connected to the inner wall of the extension plate (8), and the valve seat (7) is slidably connected to the right end face of the limit plate (6). ) surface is fixed with a convex plate (9), the surface of the convex plate (9) is fixed with a second compression spring (10), one end of the second compression spring (10) is fixedly connected to the surface of the baffle (11), the surface of the convex plate (9) is fixed with two rack plates (12), one end of the rack plate (12) is fixed with an air bag (13), the surface of the air bag (13) is fixedly connected to the surface of the extension plate (8), the surface of the extension plate (8) is rotatably connected with a rotating shaft (14), one end of the rotating shaft (14) is rotatably connected to the inner wall of the valve body (1), and a buffer structure is installed on the surface of the rotating shaft (14).

2. A check valve with a buffering function according to claim 1, characterized in that: The surface buffer structure of the rotating shaft (14) includes a limit block (16) and a gear (15), wherein the limit block (16) and the gear (15) are both fixedly connected to the surface of the rotating shaft (14), and the gear (15) is meshed with the surface of the rack plate (12). A torsion spring (17) is fixed to the surface of the limit block (16), and one end of the torsion spring (17) is fixedly connected to the inner wall of the valve body (1).

3. The check valve with a buffering function according to claim 1, characterized in that: The number of the second compression springs (10) is six, and the second compression springs (10) are distributed in a circular equidistant array on the surface of the convex plate (9).

4. A check valve with a buffering function according to claim 1, characterized in that: A telescopic rod (18) is provided inside the second compression spring (10), one end of the telescopic rod (18) is fixedly connected to the surface of the convex plate (9), and the other end of the telescopic rod (18) is fixedly connected to the surface of the baffle (11).

5. The check valve with a buffering function according to claim 1, characterized in that: The surface of the extension plate (8) is provided with a plurality of installation grooves, the inner wall of the installation groove is fixed with a sealing ring (19), and the surface of the sealing ring (19) is slidably connected to the surface of the valve seat (7).

6. The check valve with a buffering function according to claim 1, characterized in that: A guide mark (20) is provided on the surface of the valve body (1).

Images