Four-way balance type two-way normally-closed hydraulic control reversing valve

Abstract

The utility model provides a four-way balanced type two-way normally-closed hydraulic control reversing valve, which relates to the field of valves, and comprises a reversing valve body, a valve core is arranged in the reversing valve body, a plurality of bulge structures and groove structures are uniformly distributed on the inner wall of the reversing valve body, and the bulge structures and the groove structures are in a staggered distribution state. Through the protruding structures and the groove structures which are distributed on the inner wall of the reversing valve body in a staggered mode, impurities entering the valve can be effectively removed and collected, the situation that the impurities are accumulated in the gap between the valve element and the inner wall of the valve body is avoided, the movement resistance of the valve element is reduced, and the problems that the response speed becomes slow and the control precision is reduced due to the impurities are solved; it is ensured that the reversing valve stably and accurately controls the oil flow direction, and reliable operation of a hydraulic system is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve field especially relates to a four -way balanced type two -way normally closed hydraulic control reversing valve. BACKGROUND

[0002] In the modern industrial field, hydraulic systems are widely used in various mechanical equipment due to their stable transmission, high power density and other advantages. As a key control element of the hydraulic system, the four-way balanced type two-way normally closed hydraulic control reversing valve plays an important role in controlling the flow direction, pressure and flow of oil, which is of great significance to ensure the stable and efficient operation of the hydraulic system.

[0003] However, the current four-way balanced type two-way normally closed hydraulic control reversing valve faces many challenges in actual work. During its operation, the oil in the hydraulic system inevitably carries various impurities such as metal particles, dust, rubber debris, etc. These impurities will flow into the reversing valve and gradually accumulate in the gap between the valve core and the inner wall of the valve body. The accumulation of impurities not only increases the resistance of the valve core movement, causing the reversing valve to respond slowly and the control accuracy to decrease, but also can scratch the sealing surface of the valve core and the valve body, causing leakage, which seriously affects the normal operation and service life of the reversing valve.

[0004] In summary, the existing four-way balanced type two-way normally closed hydraulic control reversing valve has obvious shortcomings in terms of anti-particle ability. Therefore, a four-way balanced type two-way normally closed hydraulic control reversing valve is proposed. SUMMARY

[0005] The utility model discloses in view of the prior art's insufficient, through the convex structure and the recess structure of the staggered distribution of the inner wall of the reversing valve body, can effectively remove and collect the impurities into the valve, avoid the impurities to accumulate in the gap between the valve core and the valve body inner wall, reduce the resistance of the valve core movement, prevent the problem of slow response speed and control accuracy decrease caused by impurities, ensure that the reversing valve stably and accurately controls the flow direction of oil, and guarantees the reliable operation of the hydraulic system.

[0006] In order to solve the above technical problems, the utility model solves the problem of insufficient anti-particle ability of the four-way balanced type two-way normally closed hydraulic control reversing valve through the following technical scheme.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A four-way balanced type two-way normally closed hydraulic control reversing valve, comprising a reversing valve body, the reversing valve body is internally provided with a valve core, the inner wall of the reversing valve body is uniformly provided with a plurality of convex structures and recess structures, and the convex structures and recess structures are in a staggered distribution state.

[0009] Preferably, the protrusion structure is constructed in a conical shape, and the groove structure is constructed in a hemispherical shape.

[0010] Preferably, the reversing valve body is composed of a first valve body and a second valve body.

[0011] Preferably, the first valve body has a splicing groove that matches the second valve body, and the splicing groove allows the second valve body to be spliced ​​therein to form a reversing valve body.

[0012] Preferably, a covering surface is connected to the outer end face of the second valve body, and the covering surface covers the outer wall of the first valve body.

[0013] Preferably, the upper and lower ends of the covering surface are provided with first fixing strips, and the upper and lower ends of the outer wall of the reversing valve body are provided with second fixing strips, and the first fixing strips and the second fixing strips are in a magnetic attraction state.

[0014] Preferably, both the first fixing strip and the second fixing strip are provided with a matching arc.

[0015] Preferably, the first fixing strip has preset openings on both sides, and the preset openings are threadedly connected to the second fixing strip by fastening bolts.

[0016] Preferably, a sealing strip is provided on the outer periphery of the splicing groove opening, and the sealing strip is in a state of mutual contact with the covering surface.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The four-way balanced bidirectional normally closed hydraulic control directional valve provided in this application can effectively remove and collect impurities entering the valve through the staggered distribution of protrusions and grooves on the inner wall of the valve body. This prevents impurities from accumulating in the gap between the valve core and the inner wall of the valve body, reduces the resistance of the valve core movement, and prevents problems such as slowed response speed and decreased control accuracy caused by impurities. This ensures that the directional valve can stably and accurately control the flow of oil and guarantees the reliable operation of the hydraulic system.

[0019] The smooth conical design of the raised structure in this application reduces scratching damage to the valve core and the sealing surface of the valve body when scraping impurities. Combined with the impurity collection function of the groove structure, it prevents the sealing surface from being scratched by impurities, reduces the risk of leakage, extends the service life of the directional valve, and improves the sealing performance and safety of the hydraulic system.

[0020] The directional valve body of this application adopts a structure composed of a first valve body and a second valve body, connected by a cover, a first fixing strip, a second fixing strip, and fastening bolts. This design allows the second valve body to be easily disassembled and the internal components to be quickly exposed when the directional valve needs maintenance and repair. Compared with the traditional integral structure, this greatly simplifies maintenance operations, reduces maintenance time and labor costs, reduces equipment downtime, and improves production efficiency.

[0021] The magnetic attraction and fastening bolt connection of the first and second fixing strips in this application, along with the matching arc design, increase the contact area, which facilitates initial installation and positioning, and ensures a firm connection during long-term use, thereby improving the stability of the reversing valve body structure. The sealing strip on the outer periphery of the splicing groove fits tightly with the covering surface, ensuring the sealing of the valve body splice and preventing oil leakage. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the rear-view split structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the disassembled structure of this utility model;

[0026] Figure 4 This utility model Figure 2 A schematic diagram of a partial structure viewed from below in cross-section;

[0027] Figure 5 This is a partial structural diagram of the second valve body of this utility model;

[0028] Figure 6 This is a partial structural diagram showing the splitting of the first and second fixing strips of this utility model.

[0029] Drawing number explanation: 1. Reversing valve body; 101. Valve core; 2. First valve body; 201. Splicing groove; 202. Sealing strip; 3. Second valve body; 4. Raised structure; 5. Groove structure; 6. Covering surface; 7. First fixing strip; 701. Pre-set opening; 8. Second fixing strip; 9. Fastening bolt. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0032] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0033] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number. Example

[0034] Please see Figures 1-6 A four-way balanced bidirectional normally closed hydraulic control directional valve includes a directional valve body 1, a valve core 101 inside the directional valve body 1, and a number of protrusion structures 4 and groove structures 5 evenly distributed on the inner wall of the directional valve body 1, with the protrusion structures 4 and groove structures 5 in an alternating distribution.

[0035] I. Overall Structure

[0036] The sliding cover protection structure of this four-way balanced bidirectional normally closed hydraulic control directional valve is mainly composed of the directional valve body 1, valve core 101, first valve body 2, second valve body 3, protruding structure 4, groove structure 5, covering surface 6, first fixing strip 7, second fixing strip 8, fastening bolt 9, and sealing strip 202.

[0037] II. Detailed Structure and Connection Methods of Each Component

[0038] Reversing valve body 1 and valve core 101: The reversing valve body 1 serves as the main structure, housing the valve core 101. The valve core 101 moves within the valve body to control the flow direction of the oil. The inner wall of the reversing valve body 1 is evenly distributed with several raised structures 4 and grooved structures 5. The raised structures 4 are conical with smooth surfaces and sharp ends; the grooved structures 5 are hemispherical and used to collect impurities.

[0039] The reversing valve body 1 assembly structure consists of a first valve body 2 and a second valve body 3. The first valve body 2 has a splicing groove 201 that matches the second valve body 3, allowing the second valve body 3 to be embedded in the splicing groove 201 to form a complete reversing valve body 1. A rubber sealing strip 202 is provided around the opening of the splicing groove 201. When the second valve body 3 is assembled, the sealing strip 202 fits tightly against the covering surface 6, ensuring a good seal.

[0040] Cover surface 6 and its connection: A cover surface 6 is connected to the outer end face of the second valve body 3. The area of ​​the cover surface 6 is larger than that of the splicing groove 201, and it is an integral structure with the second valve body 3. When the second valve body 3 is spliced ​​to the first valve body 2, the cover surface 6 tightly covers the outer wall of the first valve body 2, increasing the stability of the connection. The upper and lower ends of the cover surface 6 are provided with first fixing strips 7, and the upper and lower ends of the outer wall of the reversing valve body 1 are provided with second fixing strips 8. The first fixing strips 7 and the second fixing strips 8 have matching curvatures, which can increase the contact area when in contact. The material of the first fixing strip 7 allows the two to be magnetically attracted, which is convenient for initial installation and positioning. The first fixing strip 7 has preset openings 701 on both sides, which are threadedly connected to the second fixing strip 8 by fastening bolts 9 to achieve reinforcement during long-term use.

[0041] III. Working Principle

[0042] In hydraulic systems, the four-way balanced bidirectional normally closed hydraulic control directional valve plays a key role in controlling the flow of hydraulic fluid. Its working state is driven by hydraulic control signals issued by the hydraulic control system.

[0043] When the system sends a specific hydraulic control signal, the hydraulic pressure generated by the signal acts on the valve core 101. Since the valve core 101 is located inside the directional valve body 1, and the internal space of the directional valve body 1 provides a track and constraint for the movement of the valve core 101, under the propulsion of hydraulic force, the valve core 101 moves within the directional valve body 1 in a predetermined direction.

[0044] During the movement of the valve core 101, the evenly distributed and staggered protrusions 4 and grooves 5 on the inner wall of the directional valve body 1 play an important role. The protrusions 4 are conical with smooth surfaces, which effectively reduces scratching damage between the valve core 101 and the inner wall of the directional valve body 1 when they move relative to each other and come into contact. At the same time, the sharp ends of the conical protrusions 4 have strong scraping capabilities. When the hydraulic fluid in the hydraulic system carries impurities such as metal particles, dust, and rubber debris into the directional valve and accumulates in the gap between the valve core 101 and the inner wall of the directional valve body 1, the sharp ends of the protrusions 4 can effectively scrape these stubborn impurities off the inner wall.

[0045] The groove structure 5 is designed in a hemispherical shape, which has a good impurity collection function. After the protruding structure 4 scrapes away the impurities, these impurities will be carried by the oil flow and their own gravity, with some being carried into the hydraulic system's filter device and the rest being guided into the groove structure 5 for temporary storage. Due to the hemispherical design of the groove structure 5, once impurities enter it, they are less likely to fall back into the gap between the valve core 101 and the inner wall of the reversing valve body 1, thus avoiding the accumulation of impurities in this gap, reducing the resistance to the movement of the valve core 101, and ensuring that the valve core 101 can move smoothly within the reversing valve body 1. This ensures that the reversing valve can respond quickly and accurately to the hydraulic control signal, realize the switching of oil flow direction, ensure the response speed and control accuracy of the hydraulic system, and also effectively prevent leakage problems caused by impurities scratching the sealing surface of the valve core 101 and the inner wall of the reversing valve body 1.

[0046] When a component such as valve core 101 is damaged during long-term use of the four-way balanced bidirectional normally closed hydraulic control directional valve, and maintenance and repair are required, the unique structural design of the directional valve makes the maintenance and repair work relatively simple.

[0047] The reversing valve body 1 is composed of a first valve body 2 and a second valve body 3. This spliced ​​structural design facilitates maintenance and repair. The covering surface 6 connected to the outer end face of the second valve body 3, the first fixing strip 7 set at the upper and lower ends of the covering surface 6, and the second fixing strip 8 set at the upper and lower ends of the outer wall of the reversing valve body 1 together constitute a detachable connection structure.

[0048] During maintenance and repair, firstly, since the first fixing strip 7 and the second fixing strip 8 are connected by a threaded fastening bolt 9 in addition to their magnetic attraction, the operator can first use a suitable tool to unscrew the fastening bolt 9 to disconnect the threaded connection between the first fixing strip 7 and the second fixing strip 8. Then, taking advantage of the relatively easy separation of the magnetic attraction structure between the first fixing strip 7 and the second fixing strip 8, force is applied to separate the first fixing strip 7 and the second fixing strip 8.

[0049] After the first fixing strip 7 and the second fixing strip 8 separate, the connection between the cover surface 6 and the outer wall of the reversing valve body 1 is released. At this time, the second valve body 3 can be removed from the splicing groove 201 opened on the first valve body 2. Since a rubber sealing strip 202 is provided on the outer periphery of the opening of the splicing groove 201, when removing the second valve body 3, it is only necessary to overcome the friction between the sealing strip 202 and the cover surface 6.

[0050] Once the second valve body 3 is removed, the valve core 101 and other components inside the directional control valve body 1 are fully exposed, allowing operators to easily inspect, repair, or replace them. This structural design significantly reduces the complexity of maintenance operations. Compared to the traditional integrated directional control valve body 1, which requires disassembling the entire valve for inspection, the maintenance and repair process of this directional control valve body 1 is more efficient, reducing time and labor costs. It also reduces downtime caused by equipment maintenance, improving equipment utilization and production efficiency.

[0051] Through the synergistic effect of the above-mentioned working principles of reversing operation and maintenance, this four-way balanced bidirectional normally closed hydraulic control directional valve can ensure the normal operation of the hydraulic system while conveniently and quickly carrying out maintenance and repair, meeting the requirements of industrial production for directional valves that are efficient, reliable, and easy to maintain.

[0052] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A four-way balanced bidirectional normally closed pilot operated directional valve characterized by, Including reversing valve body (1), the reversing valve body (1) is internally provided with valve core (101), the reversing valve body (1) inner wall is evenly arranged with several convex structures (4) and recessed groove structure (5), the convex structure (4) and recessed groove structure (5) are in staggered distribution state.

2. The four-way balanced type bi-directional normally closed hydraulic control reversing valve according to claim 1, characterized in that: The convex structure (4) is configured as a conical state, and the recessed groove structure (5) is configured as a hemispherical state.

3. The four-way balanced two-way normally closed pilot operated directional control valve according to claim 2, characterized in that: The reversing valve body (1) is combined by the first valve body (2) and the second valve body (3).

4. The four-way balanced two-way normally closed pilot operated directional control valve according to claim 3, characterized in that: The first valve body (2) is provided with a splicing groove (201) matched with the second valve body (3), and the splicing groove (201) allows the second valve body (3) to be spliced therein to form the reversing valve body (1).

5. The four-way balanced two-way normally closed pilot operated directional control valve according to claim 3, characterized in that: The second valve body (3) is connected with a covering surface (6) on the outer end surface, and the covering surface (6) covers the outer wall of the first valve body (2).

6. The four-way balanced two-way normally closed pilot operated directional control valve according to claim 5, characterized in that: The upper and lower ends of the covering surface (6) are provided with first fixing strips (7), and the upper and lower ends of the outer wall of the reversing valve body (1) are provided with second fixing strips (8), and the first fixing strips (7) and the second fixing strips (8) are in magnetic attraction state.

7. The four-way balanced two-way normally closed pilot operated directional control valve according to claim 6, characterized in that: The first fixing strips (7) and the second fixing strips (8) are provided with matching arcs.

8. The four-way balanced two-way normally closed pilot operated directional control valve according to claim 6, characterized in that: The first fixing strips (7) are provided with preset openings (701) on both sides, and the preset openings (701) are threadedly connected with the second fixing strips (8) through fastening bolts (9).

9. The four-way balanced two-way normally closed pilot operated directional control valve according to claim 4, characterized in that: The splicing groove (201) is provided with a sealing strip (202) outside the opening, and the sealing strip (202) and the covering surface (6) are in mutual adhesion state.

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