Cartridge valve

Abstract

The utility model discloses a cartridge valve which comprises a valve body, a main valve, a pilot valve, a spring and an adjusting rod, the main valve, the pilot valve, the spring and the adjusting rod are sequentially installed in the valve body in the axial direction of the valve body, the main valve is fixed in the valve body, the output end of the pilot valve is connected with the input end of the main valve, and the output end of the pilot valve is connected with the input end of the adjusting rod. And the input end of the pilot valve is in threaded connection with the adjusting rod. According to the cartridge valve, the adjusting rod, the spring, the pilot valve, the main valve and the valve body are arranged in a matched mode, the pressing force of the spring on the valve element of the pilot valve is adjusted by rotating the adjusting rod, and therefore the opening pressure of the pilot valve is controlled, the opening pressure of the main valve is controlled, and the working pressure of a hydraulic system can be rapidly stabilized; therefore, the hydraulic pipeline and the hydraulic element are protected from being damaged by overhigh pressure.

Description

Technical Field

[0001] The utility model relates to a cartridge valve, belonging to the technical field of hydraulic systems. Background Art

[0002] A cartridge valve usually consists of a valve body, a main valve and a pilot valve. Among them, the output end of the pilot valve is connected to the input end of the main valve. By controlling the opening pressure of the pilot valve, the opening pressure of the main valve can be controlled, so as to stabilize the working pressure of the hydraulic system.

[0003] However, at present, the adjustment of the opening pressure of the pilot valve is realized through a gate valve. Although this method can achieve pressure adjustment, the operation is troublesome, the pressure adjustment cannot be realized quickly, the working pressure of the hydraulic system cannot be stabilized quickly, and there are certain limitations.

[0004] It can be seen that in order to solve the above technical problems and quickly stabilize the working pressure of the hydraulic system, a cartridge valve is urgently needed. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a cartridge valve. By setting up a cooperation mode of an adjusting rod, a spring, a pilot valve, a main valve and a valve body, the pressing force of the spring on the spool of the pilot valve is adjusted by rotating the adjusting rod, so as to control the opening pressure of the pilot valve, and then realize the control of the opening pressure of the main valve, which can quickly stabilize the working pressure of the hydraulic system, thereby protecting the hydraulic pipeline and hydraulic components from being damaged by excessive pressure.

[0006] To achieve the above purpose / to solve the above technical problems, the utility model is realized by adopting the following technical solutions:

[0007] A cartridge valve includes a valve body, a main valve, a pilot valve, a spring and an adjusting rod. Among them,

[0008] The main valve, the pilot valve, the spring and the adjusting rod are sequentially installed in the valve body along the axial direction of the valve body. The main valve is fixed in the valve body. The output end of the pilot valve is connected to the input end of the main valve. The input end of the pilot valve is threadedly connected to the adjusting rod.

[0009] One end of the adjusting rod facing the input end of the pilot valve is provided with a receiving groove for receiving the spring. One end of the spring is connected to the spool of the pilot valve, and the other end is connected to the inner wall of the receiving groove. By rotating the adjusting rod, the pressing force of the spring is adjusted to control the opening pressure of the spool of the pilot valve.

[0010] Furthermore, it further includes a mounting sleeve. The mounting sleeve is fixed on the input end of the pilot valve. Threads adapted to the adjusting rod are provided on the inner wall of the mounting sleeve for threaded connection with the adjusting rod.

[0011] Further, it further includes a limiting component for limiting the adjusting rod. The limiting component is arranged at one end of the mounting sleeve away from the pilot valve, and there are two of them. The two limiting components are respectively arranged on the upper and lower sides of the adjusting rod.

[0012] Further, the limiting component includes a limiting seat, a threaded rod and a limiting ring. Among them,

[0013] The limiting seat is fixed to the mounting sleeve. The threaded rod is threadedly connected to the limiting seat, and one end of the threaded rod facing the adjusting rod is rotatably connected to the limiting ring. A hexagonal block is fixed to the other end of the threaded rod. By rotating the threaded rod, the limiting ring is driven to move towards or away from the adjusting rod;

[0014] The limiting ring is of a semi-ring structure, and the diameter of the circle formed by combining the two limiting rings is the same as the outer diameter of the adjusting rod.

[0015] Further, it further includes a telescopic column. One end of the telescopic column is fixed to the limiting seat, and the other end is fixed to the limiting ring.

[0016] Further, it further includes an anti-slip layer. The anti-slip layer is arranged on the side of the limiting ring facing the adjusting rod.

[0017] Further, it further includes a sealing layer. The sealing layer is arranged on the side of the limiting ring facing the mounting sleeve.

[0018] Further, the limiting component includes a support block and a limiting bolt. The support block is fixed to the mounting sleeve, and the limiting bolt is threadedly connected to the support block.

[0019] Compared with the prior art, the beneficial effects achieved by the present utility model are:

[0020] For the cartridge valve provided by the present utility model, by setting the adjusting rod, spring, pilot valve, main valve and valve body to cooperate with each other, the pressing force of the spring on the pilot valve spool is adjusted by rotating the adjusting rod, so as to control the opening pressure of the pilot valve, and thus control the opening pressure of the main valve, which can quickly and stably control the working pressure of the hydraulic system, thereby protecting the hydraulic pipeline and hydraulic components from being damaged by excessive pressure;

[0021] For the cartridge valve provided by the present utility model, by fixedly installing the mounting sleeve at the pilot valve, the connection between the pilot valve and the adjusting rod can be realized without changing the internal structure of the pilot valve, so as to adjust the opening pressure of the pilot valve through the cooperation of the adjusting rod and the spring; by arranging two limiting components at one end of the mounting sleeve away from the pilot valve, the stability of the adjusting rod can be effectively guaranteed, so as to ensure the stability after pressure adjustment. Description of the Drawings

[0022] Figure 1It is a schematic structural diagram of the cartridge valve provided in the first embodiment;

[0023] Figure 2 is Figure 1 an enlarged schematic diagram of the structure at position A in

[0024] Figure 3 It is a schematic structural diagram of another implementation manner of the limit component in the cartridge valve provided in the second embodiment.

[0025] In the figure: 1, valve body; 2, main valve; 3, pilot valve; 4, spring; 5, adjusting rod; 6, receiving groove; 7, mounting sleeve; 8, limit seat; 9, threaded rod; 10, limit ring; 11, telescopic column; 12, support block; 13, limit bolt. Detailed implementation manners

[0026] The present utility model will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations. First embodiment

[0029] As Figure 1As shown in the figure, this embodiment provides a cartridge valve, which includes a valve body 1, a main valve 2, a pilot valve 3, a spring 4, and an adjusting rod 5. Among them,

[0030] The main valve 2, the pilot valve 3, the spring 4, and the adjusting rod 5 are sequentially installed in the valve body 1 along the axial direction of the valve body 1. The main valve 2 is fixed in the valve body 1. The output end of the pilot valve 3 is connected to the input end of the main valve 2, and the input end of the pilot valve 3 is threadedly connected to the adjusting rod 5;

[0031] One end of the adjusting rod 5 facing the input end of the pilot valve 3 is provided with a receiving groove 6 for receiving the spring 4. One end of the spring 4 is connected to the spool of the pilot valve 3, and the other end is connected to the inner wall of the receiving groove 6. By rotating the adjusting rod 5, the compression force of the spring 4 is adjusted to control the opening pressure of the spool of the pilot valve 3.

[0032] In the above technical solution, by setting the adjusting rod 5, the spring 4, the pilot valve 3, the main valve 2, and the valve body 1 to cooperate with each other, by rotating the adjusting rod 5, the compression force of the spring 4 on the spool of the pilot valve 3 is adjusted, so as to control the opening pressure of the pilot valve, and then to control the opening pressure of the main valve, which can quickly and stably control the working pressure of the hydraulic system, thereby protecting the hydraulic pipeline and hydraulic components from being damaged by excessive pressure. Embodiment Two

[0033] The cartridge valve provided in this embodiment is different from the cartridge valve provided in Embodiment One in that:

[0034] To realize the connection between the adjusting rod 5 and the pilot valve 3, an installation sleeve 7 is further included. The installation sleeve 7 is fixed on the input end of the pilot valve 3. Threads adapted to the adjusting rod 5 are provided on the inner wall of the installation sleeve 7 for threaded connection with the adjusting rod 5. By rotating the adjusting rod 5, the adjusting rod 5 can move towards or away from the pilot valve, so as to realize the adjustment of the compression force of the spring 4 on the spool of the pilot valve 3.

[0035] As Figure 1 and Figure 2 shown, to realize the limitation of the adjusting rod 5, a limiting component is further included. The limiting component is arranged at one end of the installation sleeve 7 away from the pilot valve 3 and there are two of them. The two limiting components are respectively arranged on the upper and lower sides of the adjusting rod 5.

[0036] To realize the limitation of the adjusting rod 5 by the limiting component, the limiting component includes a limiting seat 8, a threaded rod 9, and a limiting ring 10. Among them,

[0037] The limit seat 8 is fixed to the mounting sleeve 7. The threaded rod 9 is threadedly connected to the limit seat 8, and one end of the threaded rod 9 facing the adjusting rod 5 is rotatably connected to the limit ring 10. A hexagonal block is fixed to the other end of the threaded rod 9. By rotating the threaded rod 9, the limit ring 10 is driven to move towards or away from the adjusting rod 5, so as to limit the adjusting rod 5 by pressing the adjusting rod 5 with the limit ring 10.

[0038] The limit ring 10 is of a semi-ring structure, and the diameter of the circle formed by combining two limit rings 10 is the same as the outer diameter of the adjusting rod 5.

[0039] To ensure the stability of the limit ring 10 during movement, a telescopic column 11 is further included. One end of the telescopic column 11 is fixed to the limit seat 8, and the other end is fixed to the limit ring 10.

[0040] To ensure the stability of the limit ring 10 when pressing the adjusting rod 5, a non-slip layer is further included. The non-slip layer is arranged on the side of the limit ring 10 facing the adjusting rod 5.

[0041] To further ensure the sealing performance at the connection between the adjusting rod 5 and the mounting sleeve 7, a sealing layer is further included. The sealing layer is arranged on the side of the limit ring 10 facing the mounting sleeve 7.

[0042] As Figure 3 shown, to realize the limitation of the adjusting rod 5 by the limiting component, the limiting component can also adopt the following scheme: including a support block 12 and a limiting bolt 13. The support block 12 is fixed to the mounting sleeve 7, and the limiting bolt 13 is threadedly connected to the support block 12. By rotating the limiting bolt 13, its movement is driven, so that the limiting bolt 13 contacts the adjusting rod 5 to realize the limitation of the adjusting rod 5.

[0043] In summary, for the cartridge valve provided in this embodiment, by fixedly installing the mounting sleeve 7 at the pilot valve 3, the connection between the pilot valve 3 and the adjusting rod 5 can be realized without changing the internal structure of the pilot valve 3, so as to adjust the opening pressure of the pilot valve 3 through the cooperation of the adjusting rod 5 and the spring 4; by arranging two limiting components at the end of the mounting sleeve 7 away from the pilot valve 3, the stability of the adjusting rod 5 can be effectively ensured, so as to ensure the stability after pressure adjustment.

[0044] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A cartridge valve, characterized in that: It comprises a valve body (1), a main valve (2), a pilot valve (3), a spring (4) and an adjusting rod (5), wherein: The main valve (2), the pilot valve (3), the spring (4) and the regulating rod (5) are sequentially installed in the valve body (1) along the axial direction of the valve body (1); the main valve (2) is fixed in the valve body (1); the output end of the pilot valve (3) is connected to the input end of the main valve (2); and the input end of the pilot valve (3) is threadedly connected to the regulating rod (5); An end of the regulating rod (5) facing the input end of the pilot valve (3) is provided with a receiving groove (6) for receiving a spring (4); one end of the spring (4) is connected to the valve core of the pilot valve (3), and the other end is connected to the inner wall of the receiving groove (6); the pressing force of the spring (4) is adjusted by rotating the regulating rod (5) to control the opening pressure of the valve core of the pilot valve (3).

2. The cartridge valve according to claim 1, characterized in that: It also comprises a mounting sleeve (7), the mounting sleeve (7) being fixed on the input end of the pilot valve (3), the inner wall of the mounting sleeve (7) being provided with a thread matching the adjusting rod (5) for being threadedly connected to the adjusting rod (5).

3. The cartridge valve according to claim 2, characterized in that: It also includes a limit assembly for limiting the position of the adjusting rod (5), wherein the limit assembly is arranged at an end of the mounting sleeve (7) away from the pilot valve (3), and two limit assemblies are arranged, and the two limit assemblies are respectively arranged at the upper and lower sides of the adjusting rod (5).

4. The cartridge valve according to claim 3, characterized in that: The limiting assembly comprises a limiting seat (8), a threaded rod (9) and a limiting ring (10), wherein: The limit seat (8) is fixed to the mounting sleeve (7), the threaded rod (9) is threadedly connected to the limit seat (8), and one end of the threaded rod (9) facing the adjusting rod (5) is rotatably connected to the limit ring (10), and a hexagonal block is fixed to the other end of the threaded rod (9), and the limit ring (10) is driven to move toward or away from the adjusting rod (5) by rotating the threaded rod (9); The limiting ring (10) is of a semi-ring structure, and the diameter of a circle formed by combining the two limiting rings (10) is consistent with the outer diameter of the adjusting rod (5).

5. The cartridge valve according to claim 4, characterized in that: It also comprises a telescopic column (11), one end of which is fixed to the limiting seat (8), and the other end of which is fixed to the limiting ring (10).

6. The cartridge valve according to claim 4, characterized in that: It also comprises an anti-slip layer, which is arranged on the side of the limiting ring (10) facing the adjusting rod (5).

7. The cartridge valve according to claim 1, characterized in that: It also comprises a sealing layer, which is arranged on a side of the limiting ring (10) facing the mounting sleeve (7).

8. The cartridge valve according to claim 3, characterized in that: The limiting assembly comprises a support block (12) and a limiting bolt (13); the support block (12) is fixed to the mounting sleeve (7); and the limiting bolt (13) is threadedly connected to the support block (12).

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