Flat plate type high wear resistance multi-way distribution valve

Abstract

The utility model relates to control valve technical field, concretely is a kind of flat plate type high wear-resisting multiway distribution valve, including valve body, the inside of valve body is equipped with multiple valve core driven by driving rod drive to advance, the side of valve body is fixed with valve cover, the inside of valve cover is fixed with sealing seat, sealing seat is equipped with the valve cavity corresponding with valve core position one to one, the inside of every valve cavity can detachably install wear-resisting nested ring, the inside of wear-resisting nested ring is embedded and is installed with flexible sealing ring, and the rear end of every valve core is equipped with the self-adapting compensation mechanism by auxiliary sealing snap ring and spring piece. The flat plate type high wear-resisting multiway distribution valve effectively improves the wear resistance and sealing reliability of valve core and valve body mating surface, reduces internal leakage, improves control accuracy, prolongs service life, and is suitable for stable operation under high-frequency commutation and high-pressure working condition.

Description

Technical Field

[0001] This utility model relates to the field of control valve technology, specifically a flat-plate type high wear-resistant multi-way distribution valve. Background Technology

[0002] In hydraulic control systems, multi-way control valves are key components responsible for controlling the operating states of multiple actuators, as seen in applications such as construction machinery, agricultural machinery, and mining equipment. With increasing industrial automation and higher performance requirements for machinery, the demand for multi-way control valves is also growing. In particular, flat-plate multi-way control valves, due to their compact design and ease of maintenance, are widely used in medium and low-pressure hydraulic systems.

[0003] Existing flat-plate multi-way distribution valves generally suffer from rapid wear on the mating surfaces between the valve core and the valve body. Under high-frequency switching or high-pressure conditions, the frequent contact and relative movement between the valve core and the valve body cause scratches or deformation on the valve core surface due to friction. This wear not only accelerates the wear rate of the valve core and valve body but also increases internal leakage, thereby affecting the valve's sealing performance and control accuracy. When the wear intensifies further, it may lead to system instability or even equipment failure, seriously affecting the reliability and service life of the equipment, while also increasing maintenance frequency and operating costs. Utility Model Content

[0004] The purpose of this utility model is to provide a flat-plate high wear-resistant multi-way distribution valve to solve the problems mentioned in the background art, such as rapid wear of the mating surface between the valve core and the valve body, poor sealing performance, increased internal leakage, decreased control accuracy, and short service life of the current flat-plate multi-way distribution valve.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flat-plate high wear-resistant multi-way distribution valve, comprising a valve body, wherein the valve body is provided with a plurality of valve cores driven and propelled by a drive rod, a valve cover is fixed on one side of the valve body, a sealing seat is fixed inside the valve cover, and a valve cavity is provided on the sealing seat corresponding to the position of the valve core, a wear-resistant nested ring is detachably installed inside each valve cavity, a flexible sealing ring is fitted inside the wear-resistant nested ring, and an adaptive compensation mechanism consisting of an auxiliary sealing ring and a spring is provided at the rear end of each valve core.

[0006] Preferably, the rear end of the auxiliary sealing ring is movably sleeved on the outside of the rear end of the valve core, the spring is connected between the rear back side of the auxiliary sealing ring and the tail end support block of the valve core, and the interior of the wear-resistant nested ring is provided with an annular positioning groove that matches the shape of the auxiliary sealing ring.

[0007] Preferably, the upper and lower sides of the outer end of the wear-resistant nested ring are fixed with connecting ears, and the connecting ears are fixedly connected to the sealing seat by positioning bolts.

[0008] Preferably, the inner end of the wear-resistant nested ring is fixed with an annular protrusion, and the inner wall of the valve cavity is provided with an annular groove that matches the annular protrusion structure.

[0009] Preferably, the outer side of the valve cover is provided with a plurality of connecting pipes, and the positions of the connecting pipes correspond one-to-one with the valve cavity.

[0010] Preferably, the outer wall shape of the wear-resistant nested ring is adapted to the inner cavity contour of the valve cavity, and it is embedded and installed using an interference fit.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: This flat-plate high wear-resistant multi-way distribution valve effectively improves the wear resistance and sealing reliability of the valve core and valve body mating surfaces, reduces internal leakage, enhances control accuracy, and extends service life. It is suitable for stable operation under high-frequency reversing and high-pressure conditions. This flat-plate high wear-resistant multi-way distribution valve achieves automatic compensation of wear gaps by setting an adaptive compensation mechanism consisting of an auxiliary sealing ring and a spring at the rear end of the valve core, ensuring long-term stable sealing performance. Furthermore, by detachably installing a wear-resistant nested ring in the valve cavity and embedding a flexible sealing ring inside it, not only is the sealing effect between the valve core and the valve cavity enhanced, but the wear resistance of key mating surfaces is also significantly improved. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a flat-plate, high-wear-resistant multi-way distribution valve according to the present invention.

[0013] Figure 2 This is a schematic diagram of the inner structure of the valve cover of a flat-plate high wear-resistant multi-way distribution valve according to this utility model.

[0014] Figure 3 This is a schematic diagram of the wear-resistant nested ring inner end structure of a flat-plate high wear-resistant multi-way distribution valve according to this utility model.

[0015] In the diagram: 1. Valve body; 2. Valve core; 3. Valve cover; 4. Sealing seat; 5. Valve cavity; 6. Wear-resistant nested ring; 7. Flexible sealing ring; 8. Auxiliary sealing ring; 9. Spring component; 10. Connecting lug; 11. Annular protrusion. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3This utility model provides a technical solution: a flat-plate type high wear-resistant multi-way distribution valve, including a valve body 1. The valve body 1 contains multiple valve cores 2 driven by drive rods. The outer surface of the valve cores 2 undergoes ultra-precision machining and surface strengthening treatment, such as tungsten carbide coating, to improve its surface hardness and wear resistance. A valve cover 3 is fixed to one side of the valve body 1, and the valve cover 3 is fixed to the valve body 1 by locking bolts, with a sealing gasket between them. A sealing seat 4 is fixed inside the valve cover 3, and the sealing seat 4 has valve cavities 5 corresponding one-to-one with the positions of the valve cores 2. Each valve cavity 5 has a detachably installed wear-resistant nested ring 6. The wear-resistant nested ring 6 can be made of high-chromium cast iron or ceramic composite material, possessing excellent wear resistance and corrosion resistance, and can withstand high wear. To maintain stable performance under high temperature, high pressure, and high frequency reversing conditions, a flexible sealing ring 7 is fitted inside the wear-resistant nested ring 6. Furthermore, each valve core 2 has an adaptive compensation mechanism at its rear end consisting of an auxiliary sealing ring 8 and a spring 9. The rear end of the auxiliary sealing ring 8 is movably sleeved on the outside of the rear end of the valve core 2. The spring 9 connects the back side of the rear end of the auxiliary sealing ring 8 to the tail end support block of the valve core 2. The spring 9 is also sleeved on the outside of the rear end of the valve core 2. The wear-resistant nested ring 6 has an annular positioning groove that matches the shape of the auxiliary sealing ring 8. With this structure, the valve core 2 reciprocates within the valve body 1 through the push of the drive rod to achieve oil circuit switching control. The auxiliary sealing ring 8 in the adaptive compensation mechanism at the rear end of the valve core 2... The spring element 9 works in concert to ensure that the auxiliary sealing ring 8 fits snugly against the annular positioning groove inside the wear-resistant nested ring 6 during sealing. Simultaneously, the wear-resistant nested ring 6 is securely installed within the sealing seat 4 through its fitting structure with the valve cavity 5. The flexible sealing ring 7 is embedded within the wear-resistant nested ring 6, further enhancing the sealing performance between the valve core 2 and the valve cavity 5. Furthermore, the high hardness of the wear-resistant nested ring 6 effectively reduces wear between the valve core 2 and its contact surface, preventing scratches or deformation on the valve core 2 surface, thereby reducing the risk of internal leakage and improving control accuracy and system stability. This structure solves the problems of rapid wear of the valve core and valve body mating surfaces, poor sealing performance, increased internal leakage, decreased control accuracy, and short service life in existing flat-plate multi-way distribution valves under high-frequency switching or high-pressure conditions. This design significantly improves the reliability and durability of the multi-way distribution valve under complex operating conditions. The wear-resistant nested ring 6 has connecting ears 10 fixed on both the upper and lower sides of its outer end, and these connecting ears 10 are fixedly connected to the sealing seat 4 by positioning bolts. During use, the wear-resistant nested ring 6 is securely connected to the sealing seat 4 through the engagement of the connecting ears 10 fixed on its upper and lower outer ends with the positioning bolts. This ensures that it will not shift or loosen under high pressure or frequent reversing conditions, thus maintaining the stability and consistency of the fit between the valve core 2 and the valve cavity 5, further improving sealing performance and wear resistance. An annular protrusion 11 is welded and fixed to the inner end of the wear-resistant nested ring 6, and an annular groove matching the structure of the annular protrusion 11 is provided on the inner wall of the inner end of the valve cavity 5.The wear-resistant nested ring 6 of this structure achieves precise positioning and fit with the annular groove on the inner wall of the valve cavity 5 through the annular protrusion 11. This gives the wear-resistant nested ring 6 higher coaxiality and stability after installation, effectively preventing axial displacement or slight rotation under high pressure or frequent reversing conditions. This ensures a tighter and more reliable sealing fit between the valve core 2 and the valve cavity 5, further improving the valve's sealing performance and wear resistance. Several connecting pipes are evenly fixed on the outer side of the valve cover 3, and the positions of the connecting pipes correspond one-to-one with those of the valve cavity 5. The ends of the connecting pipes are equipped with O-ring sealing groove structures to provide a reliable static seal when connected to external pipeline flanges, preventing leakage at the connection and improving the sealing reliability of the system. This structure's connecting pipes enable independent connection and distribution of each oil passage, ensuring that fluid can accurately and efficiently enter or exit the corresponding valve chamber 5. This improves the control accuracy and flow efficiency of the multi-way distribution valve in complex hydraulic systems. Simultaneously, the uniform arrangement of the connecting pipes also contributes to the balanced distribution of system pressure, enhancing the overall stability and response speed of the valve operation. The outer wall shape of the wear-resistant nested ring 6 is adapted to the inner contour of the valve chamber 5 and is embedded using an interference fit. This structure ensures that the wear-resistant nested ring 6 is firmly fixed inside the valve chamber 5, preventing loosening or displacement during high pressure or frequent reversing, thereby effectively improving the stability and sealing of the mating surface between the valve core 2 and the valve chamber 5.

[0018] Working Principle: When using this flat-plate high wear-resistant multi-way distribution valve, firstly, each oil passage is connected to the corresponding valve chamber 5 via connecting pipes. The valve core 2 reciprocates inside the valve body 1 through the push of the drive rod to achieve switching control between different oil passages. After the valve core 2 moves to the corresponding position, its front end contacts and engages with the wear-resistant nested ring 6 inside the valve chamber 5. The wear-resistant nested ring 6 achieves a sealing engagement with the valve core 2 through the flexible sealing ring 7 on its inner wall. At the same time, the auxiliary sealing ring 8 at the rear end of the valve core 2 is embedded in the annular positioning groove inside the wear-resistant nested ring 6 under the action of the spring 9, ensuring that the sealing structure always remains in a close fit during the movement. Meanwhile, the outer end of the wear-resistant nested ring 6 is connected to the sealing seat 4 through the connecting ears 10 on the upper and lower sides and the positioning bolts, further enhancing its installation stability under high pressure and frequent reversing conditions. In addition, the annular protrusion 11 at the inner end of the wear-resistant nested ring 6 engages with the annular groove on the inner wall of the valve chamber 5, further ensuring its coaxiality and anti-displacement performance after installation, thus completing a series of operations.

[0019] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flat-plate type high wear-resistant multi-way distribution valve, comprising a valve body (1), wherein the valve body (1) is provided with a plurality of valve cores (2) driven and propelled by a drive rod, and a valve cover (3) is fixed on one side of the valve body (1), characterized in that: The valve cover (3) has a sealing seat (4) fixed inside. The sealing seat (4) has a valve cavity (5) that corresponds to the position of the valve core (2). Each valve cavity (5) has a wear-resistant nested ring (6) detachably installed inside. A flexible sealing ring (7) is fitted inside the wear-resistant nested ring (6). Each valve core (2) has an adaptive compensation mechanism at its rear end consisting of an auxiliary sealing ring (8) and a spring (9).

2. The flat-plate type high wear-resistant multi-way distribution valve according to claim 1, characterized in that: The rear end of the auxiliary sealing ring (8) is movably sleeved on the outside of the rear end of the valve core (2). The spring (9) is connected between the rear back side of the auxiliary sealing ring (8) and the tail end support block of the valve core (2). The wear-resistant nested ring (6) has an annular positioning groove inside that matches the shape of the auxiliary sealing ring (8).

3. The flat-plate type high wear-resistant multi-way distribution valve according to claim 1, characterized in that: The upper and lower sides of the outer end of the wear-resistant nested ring (6) are fixed with connecting ears (10), and the connecting ears (10) are fixedly connected to the sealing seat (4) by positioning bolts.

4. A flat-plate type high wear-resistant multi-way distribution valve according to claim 1, characterized in that: The inner end of the wear-resistant nested ring (6) is fixed with an annular protrusion (11), and the inner wall of the valve cavity (5) is provided with an annular groove that matches the structure of the annular protrusion (11).

5. A flat-plate type high wear-resistant multi-way distribution valve according to claim 1, characterized in that: The valve cover (3) is provided with several connecting pipes evenly distributed on its outer side, and the positions of the connecting pipes correspond one-to-one with those of the valve cavity (5).

6. A flat-plate type high wear-resistant multi-way distribution valve according to claim 1, characterized in that: The outer wall shape of the wear-resistant nested ring (6) is adapted to the inner cavity contour of the valve cavity (5), and it is embedded and installed by interference fit.

Images