Valve element assembly of pressure compensation valve and pressure compensation valve

Abstract

The utility model relates to the technical field of pressure compensation valves, and discloses a valve core assembly of a pressure compensation valve and the pressure compensation valve, the valve core assembly comprises a valve core, a spring and a spring seat; one end of the valve element is close to a load port of the pressure compensation valve, the spring seat is fixedly connected to the end, away from the load port, of the valve element, a flange extends out of the spring seat towards the periphery of the spring seat, and at least part of the flange protrudes out of the radial direction of the valve element. The valve element is sleeved with the spring, one end of the spring abuts against the flange, the flange limits the spring to be separated from the valve element, and the other end of the spring abuts against the valve body of the pressure compensation valve directly or indirectly. The valve element assembly has the advantages that the check ring and the spring seat are integrated and fixedly connected to the end of the valve element, the spring directly abuts against the flange of the spring seat, the flange limits the spring to be separated from the valve element, the spring can be effectively prevented from slipping, and the valve element assembly is simple in structure and convenient to assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure compensation valves, in particular to a spool assembly of a pressure compensation valve and a pressure compensation valve. Background Art

[0002] One of the main functions of a pressure compensation valve in a hydraulic system is to maintain a constant flow rate when the load pressure changes.

[0003] The existing pressure compensation valve mainly consists of components such as a valve body, a valve cover, a spool, a spring, and a spring seat. The spool is disposed in the valve body in a telescopically movable manner. The valve cover is disposed at the end of the valve body. The spring is restricted at one end of the spool through a retaining ring and a spring seat. Limiting the spring through the retaining ring is likely to cause the spring to slip off during actual use, thereby affecting the normal use or control accuracy of the pressure compensation valve. Summary of the Utility Model

[0004] Aiming at the above deficiencies existing in the prior art, the technical problem to be solved by the utility model is to provide a spool assembly of a pressure compensation valve that can prevent the spring from slipping off, has a simple structure, and is convenient for assembly, and a pressure compensation valve.

[0005] The technical solution adopted by the utility model to solve its technical problem is to provide a spool assembly of a pressure compensation valve, including:

[0006] A spool, a spring, and a spring seat;

[0007] One end of the spool is close to the load port of the pressure compensation valve. The spring seat is fixedly connected to the end of the spool far from the load port, and a flange extends from the spring seat towards its outer circumference, and at least part of the flange protrudes radially from the spool;

[0008] The spring is sleeved on the spool, and one end of the spring abuts against the flange. The flange restricts the spring from detaching from the spool, and the other end of the spring directly or indirectly abuts against the valve body of the pressure compensation valve.

[0009] Further, a threaded hole is provided at one end of the spool close to the spring seat. A threaded rod is provided on the spring seat, and the threaded rod is threadedly connected to the threaded hole to fixedly connect the spring seat to the spool.

[0010] Further, one end of the spool close to the spring seat has a connecting rod, the threaded hole is located on the connecting rod, and the spring is sleeved on the connecting rod;

[0011] The spring seat has a ring of the flange;

[0012] The inner diameter of the spring is larger than the diameter of the connecting rod and smaller than the diameter of the flange.

[0013] Furthermore, the diameter of the flange is larger than the outer diameter of the spring.

[0014] Furthermore, a gasket is arranged on the valve body of the pressure compensation valve and abuts against the valve body; one end of the spring away from the spring seat abuts against the gasket.

[0015] The spring is compressed between the spring seat and the gasket, and the compression amount of the spring can be adjusted by screwing the spring seat.

[0016] Furthermore, a boss protrudes from the spring seat towards the end away from the threaded rod, and two side walls arranged in parallel are provided on the boss.

[0017] The technical solution adopted by the present utility model to solve its technical problems is to further provide a pressure compensation valve, including:

[0018] A valve body, on which an oil inlet, an oil outlet and a load port are provided;

[0019] An end cover, arranged on the valve body;

[0020] A valve core, a spring and a spring seat; the valve core is telescopically arranged in the valve body, one end of the valve core is close to the load port, the spring seat is fixedly connected to the end of the valve core away from the load port, and a flange extends from the spring seat towards its outer periphery, and at least part of the flange protrudes radially from the valve core; the spring is sleeved on the valve core, one end of the spring abuts against the flange, the flange restricts the spring from detaching from the valve core, and the other end of the spring abuts directly or indirectly against the valve body.

[0021] Furthermore, a threaded hole is provided at one end of the valve core close to the spring seat, a threaded rod is provided on the spring seat, and the threaded rod is threadedly connected in the threaded hole to fixedly connect the spring seat and the valve core;

[0022] The spring is in a compressed state, and the compression amount of the spring can be adjusted by screwing the spring seat.

[0023] Furthermore, a circle of the flange is provided on the spring seat, and the diameter of the flange is larger than the outer diameter of the spring.

[0024] Compared with the prior art, the present utility model has the following beneficial effects:

[0025] In the present utility model, the spring seat is fixedly connected to the end of the valve core. One end of the spring directly abuts against the flange on the spring seat, so that the flange can prevent the spring from detaching from the valve core. The existing retaining ring is cancelled, which can effectively ensure that the spring will not slip during operation, thereby ensuring the structural stability of the valve core assembly, the normal operation and accuracy of the pressure compensation valve. Moreover, the structure of the pressure compensation valve can be simplified and the assembly is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. is a schematic structural view of the valve core assembly of the pressure compensation valve of the present utility model;

[0027] Figure 2 is Figure 1 a half-sectional schematic view of;

[0028] Figure 3 is Figure 1 an exploded view of;

[0029] Figure 4 FIG. is a schematic structural view of the pressure compensation valve of the present utility model;

[0030] Figure 5 is Figure 4 a half-sectional schematic view of;

[0031] Figure 6 FIG. is a schematic view of the pressure compensation valve of the present utility model when used in a specific hydraulic circuit.

[0032] In the figures:

[0033] 1. Valve core; 10. Connecting rod; 101. Threaded hole;

[0034] 2. Spring;

[0035] 3. Spring seat; 30. Flange; 31. Threaded rod; 32. Boss; 320. Side wall;

[0036] 4. Valve body; 40. Gasket; 41. Inlet port; 42. Outlet port; 43. Load port;

[0037] 5. End cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The following are specific embodiments of the present utility model and in combination with the drawings, the technical solutions of the present utility model are further described, but the present utility model is not limited to these embodiments.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0040] In addition, in the present utility model, descriptions such as "first", "second", "one", etc. are only for descriptive purposes and should not be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present utility model, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] In addition, the technical solutions between the various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0043] Embodiment 1:

[0044] As Figures 1-3As shown in the figure, a spool assembly of a pressure compensation valve mainly includes: a spool 1, a spring 2, and a spring seat 3. Among them, one end of the spool 1 is close to the load port 43 of the pressure compensation valve. During use, the pressure oil passing through the load port 43 can cause the spool 1 to expand and contract. The spring seat 3 is fixedly connected to the end of the spool 1 away from the load port 43, and a flange 30 extends from the spring seat 3 towards its outer periphery. At least part of the flange 30 protrudes radially from the spool 1. It should be noted that whether the flange 30 is a full-circle flange 30 or a non-full-circle flange 30 can limit the spring 2 and provide a place for the spring 2 to abut against. Therefore, in this embodiment, as long as part of the flange 30 protrudes radially from the spool 1, the purpose of limiting can be achieved, but preferably the flange 30 is a full-circle flange 30. The spring 2 is sleeved on the spool 1, and one end of the spring 2 abuts against the flange 30. The flange 30 restricts the spring 2 from detaching from the spool 1. The other end of the spring 2 directly or indirectly abuts against the valve body 4 of the pressure compensation valve. When the other end of the spring 2 directly abuts against the valve body 4, a limiting ring integrated with the valve body 4 needs to be provided on the valve body 4. When the other end of the spring 2 indirectly abuts, a gasket 40 can be provided. The gasket 40 abuts against the valve body 4, and the spring 2 abuts against the gasket 40.

[0045] Specifically, a threaded hole 101 is provided at one end of the spool 1 of this embodiment close to the spring seat 3. A threaded rod 31 is provided on the spring seat 3, and the threaded rod 31 is threadedly connected in the threaded hole 101 to fixedly connect the spring seat 3 and the spool 1. The spring seat 3 is fixedly connected to the spool 1 in a threaded connection form, which is convenient for disassembly and assembly and manufacturing. And by rotating the spring seat 3, the spring seat 3 can expand and contract, and thus the compression amount of the spring 2 can be adjusted. Among them, one end of the spool 1 close to the spring seat 3 has a connecting rod 10, and the threaded hole 101 is at the end of the connecting rod 10. The spring 2 is sleeved on the connecting rod 10. There is a circle of flange 30 on the spring seat 3. The inner diameter of the spring 2 is larger than the diameter of the connecting rod 10 and smaller than the diameter of the flange 30. The inner diameter of the spring 2 being larger than the diameter of the connecting rod 10 can ensure that the spring 2 is conveniently sleeved on the connecting rod 10, while the inner diameter of the spring 2 being smaller than the diameter of the flange 30 ensures that the flange 30 can limit the spring 2 and prevent the spring 2 from detaching from the spool 1. Further, the diameter of the flange 30 is larger than the outer diameter of the spring 2, ensuring that the spring 2 abuts against the flange 30 with a large contact area, which can further prevent the spring 2 from slipping off the flange 30 and improve the structural stability.

[0046] As a preferred solution, a gasket 40 that abuts against it is arranged on the valve body 4 of the pressure compensation valve. The end of the spring 2 away from the spring seat 3 abuts against the gasket 40, that is, this is the way for the spring 2 to indirectly abut against the valve body 4. The spring 2 is compressed between the spring seat 3 and the gasket 40, and the compression amount of the spring 2 can be adjusted by screwing the spring seat 3. Users can screw the spring seat 3 to adjust the compression amount of the spring 2 according to actual needs.

[0047] To facilitate the screwing of the spring seat 3, a boss 32 protrudes from one end of the spring seat 3 away from the threaded rod 31. The boss 32 has two side walls 320 arranged in parallel, and the two side walls 320 can facilitate the clamping of tools similar to wrenches to screw the spring seat 3, and it is also convenient to assemble and disassemble the spring seat 3 through tools.

[0048] During actual use, the spring seat 3 of this embodiment is fixedly connected to the end of the valve core 1. One end of the spring 2 directly abuts against the flange 30 on the spring seat 3, so that the flange 30 can prevent the spring 2 from detaching from the valve core 1. The existing retaining ring is cancelled, which can effectively ensure that the spring 2 will not slip during operation, thereby ensuring the structural stability of the valve core assembly, the normal operation and accuracy of the pressure compensation valve. Moreover, the structure of the pressure compensation valve can be simplified and the assembly is more convenient.

[0049] Embodiment Two:

[0050] As Figures 4-6 shown, and in combination with Figure 2 shown, a pressure compensation valve of this embodiment mainly includes:

[0051] A valve body 4, on which an oil inlet 41, an oil outlet 42 and a load port 43 are provided. Oil enters through the oil inlet 41, the oil outlet 42 can be connected to the front end of the flow valve, and the load port 43 is used to connect the load;

[0052] An end cover 5, which is arranged on the valve body 4. The end cover 5 is detachably connected to the valve body 4 to protect the components in the valve body 4;

[0053] The valve core 1, spring 2 and spring seat 3 in Embodiment One; the valve core 1 is telescopically arranged in the valve body 4. One end of the valve core 1 is close to the load port 43, the spring seat 3 is fixedly connected to the end of the valve core 1 away from the load port 43, and a flange 30 extends from the spring seat 3 to its outer periphery, and at least part of the flange 30 protrudes radially from the valve core 1; the spring 2 is sleeved on the valve core 1, and one end of the spring 2 abuts against the flange 30, and the flange 30 restricts the spring 2 from detaching from the valve core 1, and the other end of the spring 2 directly or indirectly abuts against the valve body 4.

[0054] The pressure compensation valve of this embodiment is a threaded insert type pressure compensation valve. As a pressure compensation element, during actual use, the valve core 1 can sense the pressure difference between the load port 43 and the oil outlet 42, and control the flow of oil by adjusting the opening of the oil port. When the pressure at the load port 43 changes, the valve core 1 will adjust its position according to the elastic force of the spring 2 and the pressure difference between the two oil ports, so that the flow rate from the oil inlet 41 to the oil outlet 42 remains basically unchanged.

Claims

1. A spool assembly of a pressure compensating valve, characterized in that, Comprising: A spool, a spring and a spring seat; One end of the spool is close to the load port of the pressure compensation valve. The spring seat is fixedly connected to the end of the spool away from the load port, and a flange extends from the spring seat towards its outer periphery, and at least part of the flange protrudes radially from the spool; The spring is sleeved on the spool, and one end of the spring abuts against the flange. The flange restricts the spring from detaching from the spool, and the other end of the spring directly or indirectly abuts against the valve body of the pressure compensation valve.

2. The spool assembly of the pressure compensation valve according to claim 1, wherein, A threaded hole is provided at the end of the spool close to the spring seat. A threaded rod is provided on the spring seat, and the threaded rod is threadedly connected in the threaded hole to fixedly connect the spring seat and the spool.

3. The spool assembly of the pressure compensation valve according to claim 2, characterized in that One end of the spool close to the spring seat has a connecting rod, the threaded hole is located on the connecting rod, and the spring is sleeved on the connecting rod; There is a ring of the flange on the spring seat; The inner diameter of the spring is larger than the diameter of the connecting rod and smaller than the diameter of the flange.

4. The spool assembly of the pressure compensation valve according to claim 3, characterized in that, The diameter of the flange is larger than the outer diameter of the spring.

5. The spool assembly of the pressure compensation valve according to claim 2, characterized in that, A gasket is arranged on the valve body of the pressure compensation valve and abuts against it. The end of the spring away from the spring seat abuts against the gasket; The spring is compressed between the spring seat and the gasket, and the compression amount of the spring can be adjusted by screwing the spring seat.

6. The spool assembly of the pressure compensation valve according to claim 2, characterized in that, The spring seat protrudes a boss towards the end away from the threaded rod, and two parallel side walls are provided on the boss.

7. A pressure compensation valve, characterized in that, Comprising: A valve body, on which an oil inlet, an oil outlet and a load port are provided; An end cover, arranged on the valve body; A spool, a spring and a spring seat; the spool is telescopically arranged in the valve body. One end of the spool is close to the load port. The spring seat is fixedly connected to the end of the spool away from the load port, and a flange extends from the spring seat towards its outer periphery, and at least part of the flange protrudes radially from the spool; the spring is sleeved on the spool, and one end of the spring abuts against the flange. The flange restricts the spring from detaching from the spool, and the other end of the spring directly or indirectly abuts against the valve body.

8. The pressure compensation valve according to claim 7, characterized in that, A threaded hole is provided at the end of the spool close to the spring seat. A threaded rod is provided on the spring seat, and the threaded rod is threadedly connected in the threaded hole to fixedly connect the spring seat and the spool; The spring is in a compressed state, and the compression amount of the spring can be adjusted by screwing the spring seat.

9. The pressure compensation valve according to claim 7, characterized in that, There is a ring of the flange on the spring seat, and the diameter of the flange is larger than the outer diameter of the spring.

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