CN219327815U

CN219327815U - Check valve with adjustable opening pressure

Info

Publication number: CN219327815U
Application number: CN202320318071.0U
Authority: CN
Inventors: 刘伟国; 李江河
Original assignee: Zhejiang Guangwo Valve Co ltd
Current assignee: Zhejiang Guangwo Valve Co ltd
Priority date: 2023-02-15
Filing date: 2023-02-15
Publication date: 2023-07-11
Anticipated expiration: 2033-02-15

Abstract

The utility model discloses a check valve with adjustable opening pressure, which comprises a valve body, a valve core, a spring and a valve seat, wherein the valve seat is arranged in the valve body, and the valve core is pressed on the valve seat through the spring; the valve core comprises a guide rod and a sealing ring, the sealing ring is arranged on the periphery of the guide rod, a first guide disc and a second guide disc are arranged in a valve seat, a first guide hole and a second guide hole for the guide rod to pass through are respectively formed in the middle of the first guide disc and the middle of the second guide disc, a first guide opening and a second guide opening for the medium to pass through are respectively formed in the first guide disc and the second guide disc, the valve seat is arranged on one side, close to the second guide disc, of the first guide disc, a thread section is arranged on the guide rod, an adjusting ring is connected to the thread section in a threaded mode, a spring is sleeved on the periphery of the guide rod, one end of the spring abuts against the adjusting ring, and the other end of the spring abuts against the second guide disc. The utility model has the function of adjustable opening pressure, has better universality, reduces the use cost and is more convenient to maintain.

Description

Check valve with adjustable opening pressure

Technical Field

The utility model relates to the technical field of valves, in particular to a check valve with adjustable opening pressure.

Background

The check valve is also called as check valve and one-way valve, and is used in pipeline system, and is opened and closed automatically by means of the force produced by medium flow in pipeline. The existing check valve structure mostly comprises a valve body, a spring, a valve core and a valve seat, wherein the valve seat is arranged in the valve body, a flow channel in the valve body is blocked when the valve core is pressed on the valve seat under the action of the spring, when the pressure of an upstream medium acting on the valve core is larger than the spring force generated by the spring, the valve core is separated from the valve seat to enable the flow channel to be conducted, the valve is opened, and when the pressure of the upstream medium is smaller than the spring force, the valve core is pressed on the valve seat again to enable the flow channel to be blocked, and the valve is closed. The opening pressure of the existing check valve is constant, and in the same equipment, the opening pressures of different bypass pipelines have different requirements, and the existing method is to install check valves with corresponding specifications on different bypass pipelines, so that the effect of different opening pressures is achieved. Because the check valves cannot be commonly used, a user is usually required to store check valves with a plurality of specifications, so that the use cost is high, and check valves with corresponding specifications are required to be selected during replacement, so that the check valves are inconvenient to maintain.

Disclosure of Invention

The utility model aims to provide the check valve with the adjustable opening pressure, which has the function of the adjustable opening pressure, has better universality, reduces the use cost and is more convenient to maintain.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the check valve with the adjustable opening pressure comprises a valve body, a valve core, a spring and a valve seat, wherein the valve seat is arranged in the valve body, and the valve core is pressed on the valve seat through the spring; the valve core comprises a guide rod and a sealing ring, wherein the sealing ring is arranged on the periphery of the guide rod and is in sealing fit with a valve seat, a first guide disc and a second guide disc are arranged in the valve seat, a first guide hole and a second guide hole for the guide rod to pass through are respectively formed in the middle of the first guide disc and the middle of the second guide disc, a first guide opening and a second guide opening for the medium to pass through are respectively formed in the first guide disc and the second guide disc, the valve seat is arranged on one side, close to the second guide disc, of the first guide disc, a thread section is arranged on the guide rod, an adjusting ring is connected to the thread section in a threaded mode, the spring is sleeved on the periphery of the guide rod, one end of the spring abuts against the adjusting ring, and the other end of the spring abuts against the second guide disc.

Through adopting above-mentioned technical scheme, when needing to adjust valve opening pressure, only need rotatory adjusting ring, make the axial position of adjusting ring on the guide arm change, make the compression degree of spring change to the pretightning force that makes the guide arm receive changes correspondingly, adjust to pretightning force equals valve opening pressure can. The structure can realize the adjustment of the valve opening pressure, has simple structure, convenient adjustment and good universality, reduces the use cost and is more convenient to maintain.

The utility model is further characterized in that a first positioning flange is arranged on one side, close to the second guide disc, of the adjusting ring, a second positioning flange is arranged on one side, close to the adjusting ring, of the second guide disc, and two ends of the spring are respectively sleeved on the peripheries of the first positioning flange and the second positioning flange.

Through adopting above-mentioned technical scheme, can fix a position the spring, guarantee the stability of spring installation, avoid spring flexible in-process to take place the deformation of skew center pin direction.

The utility model is further arranged such that the spring is conical in shape.

Through adopting above-mentioned technical scheme, it has higher lateral stability, can reduce buckling risk, reduces vibration simultaneously, and the performance is superior, long service life.

The utility model is further characterized in that the sealing ring is sleeved on the periphery of the guide rod, the periphery of the guide rod is also integrally provided with a supporting flange, a locking ring used for pressing the sealing ring on the supporting flange is connected to a threaded section of the guide rod in a threaded manner, and the outer diameter of the sealing ring is larger than the outer diameter of the supporting flange.

Through adopting above-mentioned technical scheme, compress tightly the sealing ring on the support flange of guide arm through the locking ring, realize the detachable installation of sealing ring, its mounting structure is simple, does benefit to the sealing ring when later stage sealing ring ages moreover and changes, and maintenance operation is very convenient.

The utility model is further characterized in that a plurality of guide convex strips extending along the axial direction are arranged in the second guide hole, and a plurality of guide grooves matched with the guide convex strips are arranged on the guide rod.

Through adopting above-mentioned technical scheme, can carry out the circumference spacing to the guide arm, further promote the stability of guide arm circumferential motion.

The utility model is further arranged in such a way that both ends of the guide rod are provided with domes.

By adopting the technical scheme, the dome structure plays a role in guiding, and is convenient for the installation operation of each component matched with the guide rod.

The utility model further provides that the valve body comprises an upstream valve body and a downstream valve body, the upstream valve body and the downstream valve body are connected together through threads, a limiting flange for limiting the downstream valve body axially is arranged on the upstream valve body, the first guide disc is integrally arranged in the upstream valve body, and the second guide disc is integrally arranged in the downstream valve body.

Through adopting above-mentioned technical scheme, the valve body divide into detachable two part structure, do benefit to the maintenance operation of earlier stage equipment and later stage, also made things convenient for the processing production of valve body simultaneously greatly.

Drawings

FIG. 1 is a perspective view of the whole of the present utility model;

FIG. 2 is a cross-sectional view of the entire present utility model;

FIG. 3 is an exploded view of the overall utility model;

FIG. 4 is a schematic diagram of the downstream valve body and guide rod assembly of the present utility model;

fig. 5 is an enlarged schematic view of the portion a in fig. 4.

In the figure: 1. a valve body; 2. a valve core; 3. a spring; 4. a valve seat; 5. a guide rod; 6. a seal ring; 7. a first guide plate; 8. a second guide plate; 9. a first guide hole; 10. a second guide hole; 11. a first conduction port; 12. a second conduction port; 13. a threaded section; 14. an adjusting ring; 15. a first positioning flange; 16. a second locating flange; 17. a support flange; 18. a locking ring; 19. a guide convex strip; 20. a guide groove; 21. a dome; 22. an upstream valve body; 23. a downstream valve body; 24. and a limit flange.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples: the check valve with adjustable opening pressure comprises a valve body 1, a valve core 2, a spring 3 and a valve seat 4, wherein the valve seat 4 is arranged in the valve body 1, the valve seat 4 and the valve body 1 are of an integrated structure, and the valve core 2 is pressed on the valve seat 4 through the spring 3; the valve core 2 comprises a guide rod 5 and a sealing ring 6, wherein the sealing ring 6 is arranged on the periphery of the guide rod 5 and is in sealing fit with the valve seat 4, namely, when the valve core 2 is pressed on the valve seat 4 by a spring 3, the valve seat 4 and the valve core 2 are in sealing fit, a first guide disc 7 and a second guide disc 8 are arranged in the valve seat 4, a first guide hole 9 and a second guide hole 10 for the guide rod 5 to pass through are respectively formed in the middle parts of the first guide disc 7 and the second guide disc 8, a first guide port 11 and a second guide port 12 for a medium to pass through are respectively formed in the first guide disc 7 and the second guide disc 8, a thread section 13 is arranged on one side, close to the second guide disc 8, of the first guide disc 7, the thread section 13 is an external thread arranged on the periphery of the guide rod 5, an adjusting ring 14 is connected to the thread section 13 in a threaded manner, a screw hole matched with the thread section 13 is formed in the middle part of the adjusting ring 14, the spring 3 is sleeved on the periphery of the guide rod 5, one end of the spring 3 abuts against the adjusting ring 14, and the other end of the spring 3 abuts against the second guide disc 8. When the valve opening pressure needs to be regulated, the regulating ring 14 is only required to be rotated, so that the axial position of the regulating ring 14 on the guide rod 5 is changed, the compression degree of the spring 3 is promoted to be changed, the pretightening force borne by the guide rod 5 is correspondingly changed, and the pretightening force is regulated to be equal to the valve opening pressure. The structure can realize the adjustment of the valve opening pressure, has simple structure, convenient adjustment and good universality, reduces the use cost and is more convenient to maintain.

As shown in fig. 2, a first positioning flange 15 is integrally arranged on one side of the adjusting ring 14, which is close to the second guiding disc 8, a second positioning flange 16 is integrally arranged on one side of the second guiding disc 8, which is close to the adjusting ring 14, and two ends of the spring 3 are respectively sleeved on the peripheries of the first positioning flange 15 and the second positioning flange 16. The design can position the spring 3, ensures the stability of the installation of the spring 3, and avoids the deformation of deviating from the central shaft direction in the expansion process of the spring 3.

Wherein the spring 3 has a conical shape. The spring 3 of this shape has higher lateral stability, can reduce buckling risk, reduces vibration simultaneously, and the performance is superior, long service life.

As shown in fig. 2, the sealing ring 6 is sleeved on the outer periphery of the guide rod 5, the sealing ring 6 is made of fluororubber material, the outer periphery of the guide rod 5 is integrally provided with a supporting flange 17, a locking ring 18 for tightly pressing the sealing ring 6 on the supporting flange 17 is connected to a threaded section 13 of the guide rod 5, the outer diameter of the sealing ring 6 is larger than the outer diameter of the supporting flange 17, and the outer diameter of the locking ring 18 is not smaller than the outer diameter of the sealing ring 6. The sealing ring 6 is tightly pressed on the supporting flange 17 of the guide rod 5 through the locking ring 18, so that the detachable installation of the sealing ring 6 is realized, the installation structure is simple, the sealing ring 6 is replaced when the later-stage sealing ring 6 is aged, and the maintenance operation is very convenient.

As shown in fig. 4 and 5, a plurality of guide ribs 19 extending in the axial direction are provided in the second guide hole 10, and a plurality of guide grooves 20 matching with the guide ribs 19 are provided on the guide rod 5. The design can carry out circumferential limit to the guide rod 5, and further improves the stability of circumferential movement of the guide rod 5.

As shown in fig. 2, both ends of the guide rod 5 are provided with domes 21. The dome 21 structure serves as a guide to facilitate the mounting operation of the components to be engaged with the guide bar 5.

As shown in fig. 2, the valve body 1 includes an upstream valve body 22 and a downstream valve body 23, the upstream valve body 22 and the downstream valve body 23 are connected together by screw threads, that is, the outer periphery of the upstream valve body 22 has an external screw thread, the inner periphery of the downstream valve body 23 has an internal screw thread matched with the external screw thread, a limit flange 24 for limiting the downstream valve body 23 axially is arranged on the upstream valve body 22, the first guide disc 7 is integrally arranged in the upstream valve body 22, and the second guide disc 8 is integrally arranged in the downstream valve body 23. The valve body 1 is divided into a detachable two-part structure, which is beneficial to the assembly in the earlier stage and the maintenance operation in the later stage, and simultaneously, the valve body 1 is also greatly convenient to process and produce.

In addition, the outer circumferences of the upstream valve body 22 and the downstream valve body 23 are each provided with a hexagonal operation portion for facilitating the rotation operation of the wrench.

Claims

1. The check valve with the adjustable opening pressure comprises a valve body (1), a valve core (2), a spring (3) and a valve seat (4), wherein the valve seat (4) is arranged in the valve body (1), and the valve core (2) is pressed on the valve seat (4) through the spring (3); the method is characterized in that: the valve core (2) comprises a guide rod (5) and a sealing ring (6), the sealing ring (6) is arranged on the periphery of the guide rod (5) and is in sealing fit with a valve seat (4), a first guide disc (7) and a second guide disc (8) are arranged in the valve seat (4), one middle part of the first guide disc (7) and the middle part of the second guide disc (8) are respectively provided with a first guide hole (9) and a second guide hole (10) which are used for allowing the guide rod (5) to pass through, a first guide opening (11) and a second guide opening (12) which are used for allowing a medium to pass through are respectively formed in the first guide disc (7) and the second guide disc (8), the valve seat (4) is arranged on one side, close to the second guide disc (8), a thread section (13) is arranged on the guide rod (5), an adjusting ring (14) is connected to the middle part of the first guide disc (7), the guide rod (3) is sleeved on the periphery of the guide rod (5), one end of the spring (3) abuts against the adjusting ring (14) and the other end of the spring (3) abuts against the other end of the second guide disc (8).

2. The adjustable cracking pressure check valve of claim 1, wherein: one side of the adjusting ring (14) close to the second guide disc (8) is provided with a first positioning flange (15), one side of the second guide disc (8) close to the adjusting ring (14) is provided with a second positioning flange (16), and two ends of the spring (3) are respectively sleeved on the peripheries of the first positioning flange (15) and the second positioning flange (16).

3. The adjustable cracking pressure check valve of claim 1, wherein: the spring (3) is conical in shape.

4. The adjustable cracking pressure check valve of claim 1, wherein: the sealing ring (6) is sleeved on the periphery of the guide rod (5), a supporting flange (17) is further integrally arranged on the periphery of the guide rod (5), a locking ring (18) used for tightly pressing the sealing ring (6) on the supporting flange (17) is connected to the threaded section (13) of the guide rod (5) in a threaded mode, and the outer diameter of the sealing ring (6) is larger than that of the supporting flange (17).

5. The adjustable cracking pressure check valve of claim 1, wherein: a plurality of guide convex strips (19) extending along the axial direction are arranged in the second guide hole (10), and a plurality of guide grooves (20) matched with the guide convex strips (19) are arranged on the guide rod (5).

6. The adjustable cracking pressure check valve of claim 1, wherein: both ends of the guide rod (5) are provided with domes (21).

7. The adjustable cracking pressure check valve of claim 1, wherein: the valve body (1) comprises an upstream valve body (22) and a downstream valve body (23), the upstream valve body (22) and the downstream valve body (23) are connected together through threads, a limiting flange (24) used for limiting the downstream valve body (23) axially is arranged on the upstream valve body (22), the first guide disc (7) is integrally arranged in the upstream valve body (22), and the second guide disc (8) is integrally arranged in the downstream valve body (23).