Slide valve structure valve terminal with leakage protection

Abstract

The utility model relates to hydraulic control equipment technical field discloses the slide valve structure valve cluster with leakproof protection, including valve cluster subassembly and the connecting pipe that is connected to the valve cluster subassembly entrance, and the connecting pipe outer wall is equipped with fixed mechanism, and the fixed mechanism is driven through bolt drive U -shaped clamp block and is driven inner wall rubber pad compaction connection interface, and the valve cluster subassembly outer wall front side is fixedly connected with auxiliary mechanism, and the auxiliary mechanism supports the connecting pipe through the placement groove and is driven through the rotating rod and holds the board overturning cooperation bolt locking and carries out lateral clamping to the connecting pipe, the utility model discloses the sealing reinforcement to the connecting interface through fixed mechanism, solves the hydraulic fluid external leakage problem, and utilizes the auxiliary mechanism to support the fixed extension section of connecting pipe simultaneously, effectively offsets gravity and vibration stress, prevents fixed mechanism loosening failure, and guarantees the long -term stability of leakproof system.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic control equipment technology, and in particular to a spool valve structure with anti-leakage protection. Background Technology

[0002] The spool valve is a key actuator in industrial hydraulic control systems. It mainly changes the on / off state of the fluid passage by moving the internal spool valve, thereby controlling the action of the actuator. In order to accurately deliver hydraulic fluid to each working unit, the valve island assembly usually needs to be physically connected to the external connecting pipe through the outer wall inlet to form a complete high-pressure fluid circuit.

[0003] However, in actual industrial applications, the sealing reliability of the connection between the valve island assembly and the connecting pipe remains a technical challenge. Since the connecting pipe is usually suspended and has its own weight, it will generate a downward bending moment under gravity. In addition, hydraulic equipment is often accompanied by high-frequency vibration and fluid impact during operation, causing the connection interface between the connecting pipe and the valve island assembly to be subjected to continuous shear stress and vibration load for a long time. This long-term stress concentration can easily cause the locking structure at the connection to loosen or produce small gaps, which in turn can lead to leakage of high-pressure hydraulic fluid. This not only causes a drop in system pressure, affecting the operating accuracy of the equipment, but the leaked hydraulic oil can also cause environmental pollution and even fire hazards. Existing conventional connection methods often lack targeted external sealing reinforcement devices and auxiliary support structures for eliminating pipeline stress, making it difficult to maintain the sealing integrity of the connection for a long time under complex and harsh working conditions.

[0004] Therefore, this utility model proposes a slide valve structure island with anti-leakage protection to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems in the prior art, the valve island of the slide valve structure is prone to loosening at the connection interface due to stress concentration or vibration after being connected to the connecting pipe, which leads to leakage of high-pressure hydraulic fluid. In addition, the existing connection method lacks effective external reinforcement and auxiliary support structure, resulting in low long-term operational reliability. The present invention aims to provide a slide valve island with leakage protection that has been improved in structure and can effectively solve the above problems.

[0006] This utility model provides a slide valve structure with anti-leakage protection, including a valve island assembly and a connecting pipe connected to the inlet of the valve island assembly. A fixing mechanism is installed on the outer wall of the connecting pipe. The fixing mechanism includes a U-shaped clamp and a rubber gasket fixedly connected to the inner wall of the U-shaped clamp. A threaded groove is formed on the upper right side of the U-shaped clamp, and a fixing groove is formed on the upper left side of the U-shaped clamp. A nut is fixedly connected to the outer wall of the upper left side of the U-shaped clamp. A fixing bolt is threadedly connected to the inner wall of the threaded groove, and the fixing bolt can move along the inner wall of the threaded groove and pass through the fixing groove. The nut is threadedly connected, and an auxiliary mechanism is fixedly connected to the front side of the outer wall of the valve island assembly. The auxiliary mechanism includes a fixing groove fixedly connected to the front side of the outer wall of the valve island assembly. A placement groove is opened in the middle of the top wall of the fixing groove. A rotating groove is opened on the left and right sides of the top wall of the fixing groove. A threaded groove is opened on the inner wall of the rotating groove on the right side of the placement groove. A rotating rod is rotatably connected to the inner wall of the rotating groove on the left side. A clamping plate is fixedly connected to the outer wall of the rotating rod. A fixing bolt is threadedly connected to the right side of the outer wall of the clamping plate. The fixing bolt can be threadedly connected to the threaded groove.

[0007] Preferably, the fixing bolt two drives the U-shaped clamp to tighten through the radial pressure generated by the threaded locking, thereby causing the rubber pad to compact the connection between the valve island assembly and the connecting pipe, and the rubber pad fills the gap between the connecting pipe and the valve island assembly.

[0008] Preferably, the rubber pad has elastic compensation capability, and when the fixing bolts are locked, the rubber pad fits against the error area on the surface of the connecting pipe to achieve a seal.

[0009] Preferably, the placement groove is used to accommodate and support a portion of the connecting pipe. When the connecting pipe is placed on the placement groove, the rotating rod drives the clamping plate to rotate to cover and clamp the connecting pipe.

[0010] Preferably, the first fixing bolt engages with the first threaded groove in the locked state, and the clamping plate applies a lateral clamping force to the connecting pipe under the action of the first fixing bolt.

[0011] Preferably, the rotating rod is rotatably engaged with the fixed groove via the rotating groove, and the clamping plate can be flipped open and closed with the rotating rod as the axis.

[0012] Preferably, the auxiliary mechanism is disposed at one end of the connecting pipe near the fixing mechanism, and the auxiliary mechanism is used to fix the extension section of the connecting pipe to counteract the stress generated by the weight of the connecting pipe and vibration.

[0013] Preferably, the length of the second fixing bolt is greater than the width of the opening of the U-shaped clamp, and the thread length of the second fixing bolt covers the distance between the second threaded groove and the nut.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model solves the problem of hydraulic fluid leakage at the interface between the valve island assembly and the connecting pipe due to gaps or installation errors by installing a fixing mechanism including a U-shaped clamp and a rubber pad on the outer wall of the connecting pipe and using bolts and nuts for radial locking. It can use the bolt locking force to drive the rubber pad to deform and compact the connection gap, and achieve a firm seal through the elastic compensation of the rubber pad, thus blocking leakage at the source.

[0016] 2. This utility model solves the problem of stress concentration and loosening failure of the fixing mechanism caused by the shaking of the connecting pipe due to its own weight or equipment vibration, by setting an auxiliary mechanism including a placement groove, a rotating clamping plate and a locking bolt on the front side of the outer wall of the valve island assembly. It can effectively support and laterally clamp the extension section of the connecting pipe, offset the gravity and vibration stress, prevent external interference from damaging the sealing structure, and ensure the long-term stability of the overall leak-proof system.

[0017] 3. This utility model, through the opening and closing structure design of the auxiliary mechanism's rotating rod driving the clamping plate to flip and lock with bolts, solves the problems of cumbersome disassembly and assembly and difficulty in adapting to the maintenance needs of different pipe diameters in the traditional fixing method. While ensuring the stable clamping of the connecting pipe, it facilitates the quick disassembly, repair or replacement of the pipe by the staff, thus improving the efficiency and convenience of equipment maintenance. Attached Figure Description

[0018] Figure 1 This is a front view of the valve island with anti-leakage protection of the slide valve structure proposed in this utility model;

[0019] Figure 2 This is a perspective view of the slide valve structure island with anti-leakage protection proposed in this utility model;

[0020] Figure 3 This is a diagram illustrating the auxiliary mechanism of the slide valve structure island with anti-leakage protection proposed in this utility model;

[0021] Figure 4 This is an exploded view of the auxiliary mechanism of the valve island with anti-leakage protection proposed in this utility model;

[0022] Figure 5 This is a schematic diagram of the fixing mechanism of the slide valve island with anti-leakage protection proposed in this utility model.

[0023] Figure 6This is an exploded view of the fixing mechanism of the valve island structure with anti-leakage protection proposed in this utility model.

[0024] Legend:

[0025] 1. Valve island assembly; 2. Auxiliary mechanism; 201. Fixing groove one; 202. Placement groove; 203. Threaded groove one; 204. Rotating rod; 205. Clamping plate; 206. Fixing bolt one; 207. Rotating groove; 3. Fixing mechanism; 301. U-shaped clamping block; 302. Rubber pad; 303. Threaded groove two; 304. Fixing bolt two; 305. Fixing groove two; 306. Nut; 4. Connecting pipe. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0027] Example:

[0028] Please refer to Figures 1 to 6 This utility model provides a slide valve structure with anti-leakage protection, which aims to solve the problems of hydraulic fluid leakage after the inlet of the existing valve island component 1 is connected to the connecting pipe 4, and the sealing failure caused by stress concentration at the connection due to the shaking of the connecting pipe 4.

[0029] Please refer to Figure 1 and Figure 2 The valve island structure with anti-leakage protection mainly includes a valve island assembly 1, a connecting pipe 4 connected to the inlet of the valve island assembly 1, a fixing mechanism 3 installed on the outer wall of the connecting pipe 4 for sealing and reinforcement, and an auxiliary mechanism 2 installed on the front side of the outer wall of the valve island assembly 1 for auxiliary support and fixing. The valve island assembly 1, as the core fluid control component, provides an inlet for fluid to enter and exit. The connecting pipe 4 is used to transport hydraulic fluid and form a connected loop with the valve island assembly 1. The fixing mechanism 3 is snapped onto the outer wall of the connecting pipe 4 and covers the joint between the connecting pipe 4 and the valve island assembly 1. The auxiliary mechanism 2 is fixedly connected to the front side of the outer wall of the valve island assembly 1. The auxiliary mechanism 2 is located outside the fixing mechanism 3 along the extension direction of the connecting pipe 4. The auxiliary mechanism 2 is used to support and limit the end of the connecting pipe 4 near the connection to eliminate the stress caused by gravity and vibration. Through the cooperation of the fixing mechanism 3 and the auxiliary mechanism 2, a double protection system of sealing first and then stabilizing is constructed to maximize the reliability of the anti-leakage system.

[0030] Please refer to Figure 2 , Figure 3 and Figure 4 The fixing groove 201 is fixedly connected to the front side of the outer wall of the valve island assembly 1. A placement groove 202 for accommodating the connecting pipe 4 is opened in the middle of the top wall of the fixing groove 201. The cross-sectional shape of the placement groove 202 is a semi-circle that matches the outer diameter of the connecting pipe 4. The inner wall of the placement groove 202 is attached to the lower surface of the connecting pipe 4. Rotating grooves 207 are opened on the top wall of the fixing groove 201 and on both the left and right sides of the placement groove 202. A threaded groove 203 is opened on the inner wall of the rotating groove 207 on the right side of the placement groove 202. A rotating rod 204 is rotatably connected to the inner wall of the rotating groove 207 on the left side. The two ends of the rotating rod 204 are rotatably connected to the inner wall of the rotating groove 207 through bearings or pins. The axis of the rotating rod 204 is parallel to the connecting pipe. 4. Along the axis, a clamping plate 205 is fixedly connected to the outer wall of the rotating rod 204. The clamping plate 205 can be rotated around the rotating rod 204. The lower surface of the clamping plate 205 is set to be a plane or an arc surface that matches the upper surface of the connecting pipe 4. The length of the clamping plate 205 is greater than the opening width of the placement groove 202. A fixing bolt 206 is threadedly connected to the right side of the outer wall of the clamping plate 205. The end of the fixing bolt 206 extends into the threaded groove 203 and is threadedly connected to the threaded groove 203. When the fixing bolt 206 is locked, the clamping plate 205 presses the connecting pipe 4. Through the bottom support of the placement groove 202 and the lateral clamping force of the clamping plate 205, the auxiliary mechanism 2 can stably fix the extension section of the connecting pipe 4.

[0031] As a preferred embodiment, in order to prevent hydraulic fluid leakage at the source and ensure reliable sealing at the connection, please refer to... Figure 5 and Figure 6The fixing mechanism 3 includes a U-shaped clamp 301, a rubber pad 302, a second threaded groove 303, a second fixing bolt 304, a second fixing groove 305, and a nut 306. The U-shaped clamp 301 is snapped onto the outside of the connection between the connecting pipe 4 and the valve island assembly 1 through its U-shaped opening structure. The rubber pad 302 is fixedly connected to the inner wall of the U-shaped clamp 301. The inner surface of the rubber pad 302 has an arc-shaped curved surface that matches the shape of the interface between the connecting pipe 4 and the valve island assembly 1. The rubber pad 302 is made of elastic rubber material. Under pressure, the rubber pad 302 can deform to fill the micro gaps at the connection and compensate for fitting errors. The upper right side of the U-shaped clamp 301 has an opening... The threaded groove 303 and the U-shaped clamp 301 have a fixing groove 305 on the upper left side. A nut 306 is fixedly connected to the outer wall of the upper left side of the U-shaped clamp 301. The nut 306 is welded and fixed to the outer wall of the U-shaped clamp 301. The central axis of the nut 306 is collinear with the central axis of the fixing groove 305. The head of the fixing bolt 304 is located outside the threaded groove 303 on one side of the U-shaped clamp 301. The length of the fixing bolt 304 is greater than the spacing at the opening of the U-shaped clamp 301. The shank of the fixing bolt 304 is threadedly connected to the inner wall of the threaded groove 303, and the end of the fixing bolt 304 passes through the fixing groove 305 and is threadedly connected to the nut 306.

[0032] As another preferred embodiment, in order to optimize the overall layout, the auxiliary mechanism 2 is located outside the fixing mechanism 3 along the extension direction of the connecting pipe 4. The fixing mechanism 3 is close to the root of the valve island assembly 1 inlet and acts directly on the leakage source. The auxiliary mechanism 2 provides lever arm support at a distance and uses the lever principle to efficiently resist the torque generated by the swing at the end of the connecting pipe 4, so as to avoid the locking effect of the fixing mechanism 3 from failing due to external force.

[0033] Working principle:

[0034] When it is necessary to reinforce the connection between valve island assembly 1 and connecting pipe 4 to prevent leakage, connect pipe 4 to the inlet of valve island assembly 1, operate fixing mechanism 3, rotate fixing bolt 304, so that fixing bolt 304 moves along the inner wall of thread groove 303 and passes through fixing groove 305 to be threadedly connected to nut 306. Continue to rotate fixing bolt 304 until the connection between valve island assembly 1 and connecting pipe 4 is locked. The locking of fixing bolt 304 generates radial pressure, which forces U-shaped clamp 301 to tighten, and drives the rubber pad 302 on the inner wall of U-shaped clamp 301 to compact the connection interface. The rubber pad 302 is deformed under pressure to fill the tiny gap at the connection and uses its own elasticity to compensate for the fitting error, so as to achieve a firm seal at the connection and block the leakage of hydraulic fluid from the source.

[0035] After sealing and reinforcement are completed, in order to prevent the connection pipe 4 from shaking due to its own weight or external factors such as equipment vibration, which would cause stress concentration at the connection and lead to loosening and failure of the fixing mechanism 3, the auxiliary mechanism 2 is operated to place the connection pipe 4 in the middle of the top wall of the fixing groove 201 on the front side of the outer wall of the valve island assembly 1. The placement groove 202 is used to support part of the pipe of the connection pipe 4. The rotating rod 204 located in the left rotating groove 207 is rotated, which causes the clamping plate 205 to flip around the rotating rod 204 to cover the connection pipe 4. The right fixing bolt 206 of the clamping plate 205 is rotated so that the end of the fixing bolt 206 is screwed into the threaded groove 203 on the inner wall of the right rotating groove 207 and locked. Through the bottom support of the placement groove 202 and the lateral clamping force of the clamping plate 205, the extension section of the connection pipe 4 is firmly fixed, effectively offsetting the stress caused by its own weight and vibration, and ensuring the long-term stability of the overall leak-proof system.

Claims

1. A spool valve island with leakage protection, including: Valve island assembly (1) and connecting pipe (4) connected to the inlet of the valve island assembly (1); The characteristic feature is that a fixing mechanism (3) is installed on the outer wall of the connecting pipe (4). The fixing mechanism (3) includes a U-shaped clamp (301) and a rubber pad (302) fixedly connected to the inner wall of the U-shaped clamp (301). A threaded groove (303) is opened at the upper right end of the U-shaped clamp (301), and a fixing groove (305) is opened at the upper left end of the U-shaped clamp (301). A nut (306) is fixedly connected to the outer wall of the upper left end of the U-shaped clamp (301). A fixing bolt (304) is threadedly connected to the inner wall of the threaded groove (303). The fixing bolt (304) can move along the inner wall of the threaded groove (303) and pass through the fixing groove (305) to be threadedly connected to the nut (306). An auxiliary mechanism (2) is fixedly connected to the front side of the outer wall of the valve island assembly (1). The auxiliary mechanism (2) includes a fixed groove (201) fixedly connected to the front side of the outer wall of the valve island assembly (1). A placement groove (202) is provided in the middle of the top wall of the fixed groove (201). A rotating groove (207) is provided on the left and right sides of the top wall of the fixed groove (201) located on the placement groove (202). A threaded groove (203) is provided on the inner wall of the rotating groove (207) located on the right side of the placement groove (202). A rotating rod (204) is rotatably connected to the inner wall of the rotating groove (207) located on the left side. A clamping plate (205) is fixedly connected to the outer wall of the rotating rod (204). A fixing bolt (206) is threadedly connected to the right side of the outer wall of the clamping plate (205). The fixing bolt (206) can be threadedly connected to the threaded groove (203).

2. The slide valve structure island with anti-leakage protection according to claim 1, characterized in that, The fixing bolt 2 (304) drives the U-shaped clamp (301) to tighten through the radial pressure generated by the threaded locking, thereby driving the rubber pad (302) to compact the connection between the valve island assembly (1) and the connecting pipe (4), and the rubber pad (302) fills the gap between the connecting pipe (4) and the valve island assembly (1).

3. The slide valve structure island with anti-leakage protection according to claim 1, characterized in that, The rubber pad (302) has elastic compensation capability. When the second fixing bolt (304) is locked, the rubber pad (302) fits against the error part of the surface of the connecting pipe (4) to achieve a seal.

4. The slide valve structure with leakage protection according to claim 1, characterized in that, The placement groove (202) is used to accommodate and support part of the connecting pipe (4). When the connecting pipe (4) is placed on the placement groove (202), the rotating rod (204) drives the clamping plate (205) to rotate to cover and clamp the connecting pipe (4).

5. The slide valve structure with anti-leakage protection as described in claim 1, characterized in that, When the fixing bolt (206) is locked, it engages with the threaded groove (203), and the clamping plate (205) applies a lateral clamping force to the connecting pipe (4) under the action of the fixing bolt (206).

6. The slide valve structure island with anti-leakage protection according to claim 1, characterized in that, The rotating rod (204) is rotated in conjunction with the fixed groove (201) through the rotating groove (207), and the clamping plate (205) can be flipped open and closed with the rotating rod (204) as the axis.

7. The slide valve structure with leakage protection according to claim 1, characterized in that, The auxiliary mechanism (2) is disposed at one end of the connecting pipe (4) near the fixing mechanism (3). The auxiliary mechanism (2) is used to fix the extension of the connecting pipe (4) to counteract the stress generated by the weight of the connecting pipe (4) and vibration.

8. The slide valve structure with leakage protection according to claim 1, characterized in that, The length of the second fixing bolt (304) is greater than the width of the opening of the U-shaped clamp (301), and the thread length of the second fixing bolt (304) covers the distance between the second threaded groove (303) and the nut (306).

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