Gear pump overflow valve convenient to disassemble

Abstract

The utility model relates to pump valve technical field especially relates to a gear pump overflow valve convenient to dismouting, including valve body and gear pump, be provided with the sealed ball body for overflow pressure relief in the valve body, is set up overflow valve oil inlet and overflow hole on the valve body, the through oil stem for fixing valve body is inserted in the gear pump, two locating blocks are fixedly installed on the through oil stem. The utility model discloses through locating block alignment and along the guide groove insertion valve body and gear pump, rotates the through oil stem and drives locating block rotation, utilizes the extrusion of locating block inclined plane to the inclined plane of moving block, promotes moving block to drive guide rod and extrudes elastic rubber block, realizes the quick fixing and disassembly of valve body, is helpful to the efficiency of valve body dismounting maintenance promotion, drives the drive frame movement through the rotation hand screw rod, and the drive frame and the receiving block cooperation drive moving plate up and down movement, and then adjust the pressure of sealed ball body, to adapt to a variety of overflow pressure relief demand, is helpful to the versatility and adjustment convenience of equipment promotion.

Description

Technical Field

[0001] This utility model relates to the field of pump and valve technology, and in particular to a gear pump overflow valve that is easy to disassemble and assemble. Background Technology

[0002] The gear pump relief valve is a pressure control element installed in the gear pump hydraulic system to ensure stable system pressure through relief pressure setting, overload protection, or flow regulation.

[0003] Under current conditions, a detachable relief valve, such as the one disclosed in CN205226502U, which is installed on a gear pump, is commonly used. This valve includes a valve body, a first oil passage screw, and a second oil passage screw, with an oil inlet and an oil outlet at the upper and lower ends of the valve body, respectively. While this design is simple and easy to install, and does not compromise the independence of the original gear pump after installation, the device uses the first and second oil passage screws to connect and fix the valve body to the gear pump via threads. Disassembly requires tools to tighten these screws, which is time-consuming and increases maintenance time and labor costs. Furthermore, the device uses a pressure spring preload to set the pressure relief; adjusting the pressure requires replacing the spring with one of different specifications. Replacing the spring necessitates stopping the machine and disassembling the valve body, affecting continuous operation and reducing work efficiency. Utility Model Content

[0004] The purpose of this utility model is to solve the problems of cumbersome disassembly and assembly and inconvenient pressure adjustment of gear pump overflow valves in the prior art, and to propose a gear pump overflow valve that is easy to disassemble and assemble.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A gear pump relief valve that is easy to assemble and disassemble includes a valve body and a gear pump. The valve body is provided with a sealing ball for overflow pressure relief. The valve body has an oil inlet and an overflow hole. An oil passage rod for fixing the valve body is inserted into the gear pump. Two positioning blocks are fixedly installed on the oil passage rod. The gear pump is provided with a fixing mechanism for horizontally fixing the oil passage rod. The fixing mechanism includes a movable block that is slidably sleeved in the gear pump and used to fix the positioning blocks. The valve body is provided with an adjusting mechanism for adjusting the pressure relief of the sealing ball.

[0006] Preferably, the fixing mechanism further includes a guide groove formed on the valve body and the gear pump to guide the positioning block, a limiting ring groove connected to the guide groove is formed in the valve body, and an abutment frame that moves against the positioning block is fixedly installed in the limiting ring groove. The valve body is equipped with a transmission rod for driving the moving block to move, and a guide rod for guiding the moving block is slidably sleeved in the valve body. An elastic rubber block that moves against the moving block is fixedly installed in the valve body.

[0007] Preferably, the movable block has a triangular structure, the positioning block has a triangular limiting groove corresponding to the movable block, and the movable block has a through hole corresponding to the transmission rod.

[0008] Preferably, the adjusting mechanism includes a movable plate slidably sleeved in the valve body, and a spring welded to the lower end of the movable plate to abut against the moving part of the sealing ball. A receiving block is fixedly installed on the upper end of the movable plate. A hand-tightening screw is threadedly connected to the valve body, and a drive frame that abuts against the receiving block and drives the movable plate to move is rotatably installed at one end of the hand-tightening screw. The valve body is fixedly installed with a baffle for guiding the flow in the overflow hole, and a conduit that penetrates the moving plate is fixedly installed on the baffle.

[0009] Preferably, the receiving block has a right-angled triangular structure, and one end of the drive frame is provided with a drive inclined surface that cooperates with the inclined surface of the receiving block.

[0010] Preferably, the conduit is vertically positioned at the lower end of the baffle, and the drive frame has a guide port corresponding to the conduit.

[0011] Compared with the prior art, the present invention has the following advantages: 1. This utility model aligns the positioning block with the guide groove and inserts it into the valve body and gear pump. Rotating the oil passage rod drives the positioning block to rotate. The pressure of the positioning block's inclined surface on the inclined surface of the moving block causes the moving block to move the guide rod and press the elastic rubber block. At the same time, it drives the transmission rod to rotate. The restoring force of the elastic rubber block causes the moving block to be locked into the positioning block for fixation. This enables the valve body to be quickly fixed and disassembled, which helps to improve the efficiency of valve body disassembly and maintenance.

[0012] 2. This utility model uses a hand-tightening screw to drive the drive frame to move. The drive frame and the receiving block work together to drive the moving plate to move up and down, thereby adjusting the pressure of the sealing ball to meet various overflow and pressure relief needs, which helps to improve the versatility and ease of adjustment of the equipment. Attached Figure Description

[0013] Figure 1 A schematic diagram of the structure of a gear pump overflow valve that is easy to disassemble and assemble, as proposed in this utility model; Figure 2 A cross-sectional view of a gear pump for a gear pump relief valve that is easy to disassemble and assemble, as proposed in this utility model. Figure 3 A cross-sectional view of the movable block of a gear pump overflow valve that is easy to disassemble and assemble, as proposed in this utility model; Figure 4 A top sectional view of the movable block of a gear pump overflow valve that is easy to disassemble and assemble, as proposed in this utility model; Figure 5A cross-sectional view of the contact frame of a gear pump overflow valve that is easy to disassemble and assemble, as proposed in this utility model; Figure 6 This is a cross-sectional view of the drive frame of a gear pump overflow valve that is easy to disassemble and assemble, as proposed in this utility model.

[0014] In the diagram: 1. Valve body; 2. Oil passage rod; 3. Positioning block; 4. Contact frame; 5. Gear pump; 6. Guide rod; 7. Moving block; 8. Elastic rubber block; 9. Transmission rod; 10. Moving plate; 11. Sealing ball; 12. Spring; 13. Receiving block; 14. Baffle; 15. Guide tube; 16. Drive frame; 17. Hand-tightening screw. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Reference Figures 1-6 A gear pump relief valve that is easy to disassemble and assemble includes a valve body 1 and a gear pump 5. A sealing ball 11 for overflow pressure relief is provided inside the valve body 1. The valve body 1 has an oil inlet and an overflow hole. The sealing ball 11 is adapted to be installed in the overflow hole. The opening and closing of the sealing ball 11 realizes the on-off control of the overflow hole.

[0017] The gear pump 5 is equipped with an oil passage rod 2 for fixing the valve body 1. The oil passage rod 2 is a hollow rod-shaped structure. Its internal channel is connected to the oil inlet of the overflow valve and the oil circuit of the gear pump 5 to realize the function of oil transmission. Two positioning blocks 3 are fixedly installed on the oil passage rod 2. The gear pump 5 is provided with a fixing mechanism for horizontally fixing the oil passage rod 2. The fixing mechanism enables quick assembly and disassembly of the valve body 1 and the gear pump 5, which helps to improve the maintenance efficiency of the valve body 1 and ensures stable and reliable fixing. The fixing mechanism includes a moving block 7 that is slidably sleeved in the gear pump 5 and used to fix the positioning blocks 3.

[0018] The valve body 1 is equipped with an adjustment mechanism for adjusting the pressure relief of the sealing ball 11. The adjustment mechanism changes the preload of the sealing ball 11 through the cooperation of the receiving block 13 and the drive frame 16, thereby achieving precise control of the overflow pressure relief to meet the pressure regulation requirements under different working conditions.

[0019] The fixing mechanism also includes a guide groove formed on the valve body 1 and the gear pump 5 to guide the positioning block 3. The guide groove is an axially extending strip-shaped groove whose cross-sectional shape is adapted to the shape of the positioning block 3 to ensure that the positioning block 3 can be smoothly inserted along the guide groove.

[0020] The valve body 1 has a limiting ring groove that communicates with the guide groove. The limiting ring groove intersects the guide groove perpendicularly, providing space for the rotation and positioning of the positioning block 3. A contact frame 4 is fixedly installed in the limiting ring groove to move against the positioning block 3. The contact frame 4 is used to limit the rotation angle of the positioning block 3 to ensure that the positioning block 3 is accurately engaged.

[0021] A transmission rod 9 for driving the moving block 7 is installed on the inner pin of the valve body 1. A guide rod 6 for guiding the moving block 7 is slidably sleeved inside the valve body 1. The guide rod 6 is a horizontally set cylindrical rod that is integrally formed with the moving block 7 to ensure that the moving block 7 makes a linear reciprocating motion along the guide rod 6.

[0022] An elastic rubber block 8 is fixedly installed inside the valve body 1, which moves against the movable block 7. The elastic rubber block 8 has a compression-rebound structure. One end of it is fixedly connected to the inner wall of the valve body 1, and the other end abuts against the movable block 7. The rebound force generated by the elastic deformation provides power for the reset of the movable block 7.

[0023] The movable block 7 has a triangular structure, and the positioning block 3 has a triangular limiting groove corresponding to the movable block 7. The cross-sectional shape of the triangular limiting groove is perfectly matched with the end shape of the movable block 7, ensuring that the movable block 7 forms a stable locking structure after being inserted, and preventing the positioning block 3 from circumferentially displacing.

[0024] The movable block 7 has a through hole corresponding to the transmission rod 9. The lower end of the transmission rod 9 passes through the through hole on the movable block 7 to ensure the effective transmission of force.

[0025] The adjusting mechanism includes a movable plate 10 that is slidably sleeved inside the valve body 1. The movable plate 10 is a horizontally arranged circular plate structure that slides and seals against the inner wall of the valve body 1. A spring 12 is welded to the lower end of the movable plate 10 and moves against the sealing ball 11. The spring 12 is a compression spring, and its axis coincides with the central axis of the sealing ball 11. The elastic pressure of the spring 12 applies a preload force to the sealing ball 11.

[0026] A receiving block 13 is fixedly installed on the upper end of the movable plate 10. A hand-tightening screw 17 is threadedly connected to the valve body 1. A drive frame 16 is rotatably installed on one end of the hand-tightening screw 17, which abuts against the receiving block 13 and drives the movable plate 10 to move. The drive frame 16 is rotatably connected to the hand-tightening screw 17 through a bearing, ensuring that the drive frame 16 only performs horizontal linear motion when the hand-tightening screw 17 rotates.

[0027] A baffle 14 for guiding the overflow orifice is fixedly installed inside the valve body 1. The baffle 14 is an annular plate structure and is fixed to the inner wall of the valve body 1 to guide the flow direction of the overflow oil. A conduit 15 that penetrates the moving plate 10 is fixedly installed on the baffle 14. The conduit 15 is a cylindrical hollow structure. Through the isolation effect of the conduit 15, the oil in the valve body 1 can be effectively blocked from contacting the transmission contact surface of the receiving block 13 and the drive frame 16, so as to avoid the oil adhesion or pressure impact affecting the power transmission accuracy of the two, and ensure the transmission stability and adjustment accuracy of the regulating mechanism.

[0028] The receiving block 13 has a right-angled triangular structure, and its inclined surface is the force-bearing surface. It is used to form an inclined transmission with the trapezoidal structure of the drive frame 16. One end of the drive frame 16 is provided with a drive inclined surface that cooperates with the inclined surface of the receiving block 13. The drive inclined surface is in close contact with the inclined surface of the receiving block 13. The horizontal driving force is converted into vertical displacement to realize the lifting and lowering adjustment of the moving plate 10.

[0029] The conduit 15 is vertically positioned at the lower end of the baffle 14. The drive frame 16 has a guide opening corresponding to the conduit 15. The guide opening is a long strip-shaped through hole, the length of which is consistent with the moving direction of the drive frame 16. It is used to avoid the conduit 15 and prevent the drive frame 16 from interfering with the conduit 15 when it moves.

[0030] The functional principle of this utility model can be explained through the following operation methods: When installing valve body 1, first place valve body 1 on gear pump 5, align and insert the positioning block 3 on oil passage rod 2 into the guide groove inside gear pump 5, and when positioning block 3 reaches the designated position, rotate oil passage rod 2 to drive positioning block 3 to rotate 90°. During the rotation of the positioning block 3, its inclined surface will apply pressure to the inclined surface of the moving block 7, driving the moving block 7 to slide along the guide rod 6 and squeeze the elastic rubber block 8. At the same time, the inner wall of the moving block 7 will push the transmission rod 9 to rotate with its pin as the fulcrum. When the positioning block 3 rotates to abut against the contact frame 4, the rebound force of the elastic rubber block 8 will push the moving block 7 to reset, so that it is stuck in the triangular limiting groove on the positioning block 3, thereby quickly fixing the valve body 1 on the gear pump 5. When it is necessary to adjust the overflow pressure, the hand screw 17 can be rotated, and the hand screw 17 drives the drive frame 16 to move horizontally through the thread transmission; When the drive frame 16 moves, one end of its trapezoidal structure interacts with the inclined surface of the receiving block 13, thereby pushing the moving plate 10 to move downward along the guide tube 15 and compressing the spring 12, thereby adjusting the preload of the spring 12 on the sealing ball 11 and achieving precise adjustment of the overflow pressure.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A gear pump relief valve that is easy to disassemble and assemble, comprising a valve body (1) and a gear pump (5), wherein a sealing ball (11) for overflow pressure relief is provided inside the valve body (1), and an overflow valve inlet and an overflow hole are provided on the valve body (1), characterized in that, The gear pump (5) is equipped with an oil passage rod (2) for fixing the valve body (1). Two positioning blocks (3) are fixedly installed on the oil passage rod (2). The gear pump (5) is provided with a fixing mechanism for horizontally fixing the oil passage rod (2). The fixing mechanism includes a moving block (7) that is slidably sleeved in the gear pump (5) and used to fix the positioning blocks (3). The valve body (1) is provided with an adjusting mechanism for adjusting the pressure relief of the sealing ball (11).

2. The gear pump overflow valve for easy disassembly and assembly according to claim 1, characterized in that, The fixing mechanism also includes a guide groove opened on the valve body (1) and the gear pump (5) to guide the positioning block (3). A limiting ring groove connected to the guide groove is opened in the valve body (1), and an abutting frame (4) that moves against the positioning block (3) is fixedly installed in the limiting ring groove. The valve body (1) has a transmission rod (9) installed inside the pin shaft for driving the moving block (7) to move. The valve body (1) has a guide rod (6) slidably sleeved inside for guiding the moving block (7). The valve body (1) has an elastic rubber block (8) fixedly installed inside for resisting the movement of the moving block (7).

3. The gear pump overflow valve for easy disassembly and assembly according to claim 2, characterized in that, The moving block (7) has a triangular structure. The positioning block (3) has a triangular limiting groove corresponding to the moving block (7). The moving block (7) has a through hole corresponding to the transmission rod (9).

4. The gear pump overflow valve for easy disassembly and assembly according to claim 1, characterized in that, The adjustment mechanism includes a movable plate (10) that is slidably sleeved in the valve body (1), and a spring (12) that moves against the sealing ball (11) is welded to the lower end of the movable plate (10). A receiving block (13) is fixedly installed on the upper end of the movable plate (10). A hand screw (17) is threadedly connected to the valve body (1), and a drive frame (16) that abuts against the receiving block (13) and drives the movable plate (10) to move is rotatably installed at one end of the hand screw (17). The valve body (1) is fixedly installed with a baffle (14) for guiding the flow in the overflow hole, and a conduit (15) that penetrates the moving plate (10) is fixedly installed on the baffle (14).

5. A gear pump overflow valve that is easy to disassemble and assemble according to claim 4, characterized in that, The receiving block (13) has a right-angled triangular structure, and one end of the drive frame (16) is provided with a drive inclined surface that cooperates with the inclined surface of the receiving block (13).

6. A gear pump overflow valve that is easy to disassemble and assemble according to claim 4, characterized in that, The conduit (15) is vertically positioned at the lower end of the baffle (14), and the drive frame (16) has a guide port corresponding to the conduit (15).

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