Gear pump for preventing backflow of liquid

Abstract

This application relates to a gear pump for preventing liquid backflow, comprising a gear pump body with a mounting cavity, an inlet channel and an outlet channel both connected to the mounting cavity, and a control gear set for driving liquid flow. The inlet channel has a rotating plate that rotates against the inner wall of the inlet channel. When liquid moves along the inlet channel towards the mounting cavity, the rotating plate adheres to the inner wall of the inlet channel; when the liquid stops moving, the rotating plate closes the inner wall of the inlet channel. During normal liquid flow, the rotating plate adheres to the inner wall of the inlet channel, reducing its impact on liquid flow. However, when the gear pump malfunctions or the pressure is insufficient, the liquid flow rate decreases or stops, at which point the rotating plate rotates due to gravity and closes the inlet channel. This application reduces liquid backflow and minimizes the possibility of liquid escaping from the mounting cavity during subsequent maintenance.

Description

Technical Field

[0001] This application relates to the field of gear pumps, and more particularly to a gear pump that prevents liquid backflow. Background Technology

[0002] A gear pump is a rotary pump that transports or pressurizes liquids by relying on the change and movement of the working volume formed between the pump cylinder and meshing gears. It consists of two gears, a pump body, and front and rear covers, forming two enclosed spaces. When the gears rotate, the volume of the space on the disengaged side increases, creating a vacuum that draws in liquid. Conversely, the volume of the space on the meshing side decreases, forcing the liquid into the pipeline. The suction and discharge chambers are separated by the meshing line of the two gears. The pressure at the discharge port of a gear pump depends entirely on the resistance at the pump outlet.

[0003] In actual use, there are cases of gear pump failure or insufficient pressure, which can easily cause liquid backflow, which is inconvenient and needs to be improved. Summary of the Invention

[0004] In order to prevent liquid backflow in the event of gear pump failure or insufficient pressure, this application provides a gear pump that prevents liquid backflow.

[0005] This application provides a gear pump to prevent liquid backflow, which adopts the following technical solution:

[0006] A gear pump for preventing liquid backflow includes a gear pump body with an installation cavity, an inlet channel and an outlet channel, both of which communicate with the installation cavity. The installation cavity is equipped with a control gear set for driving liquid flow. The inlet channel has a rotating plate that rotates against the inner wall of the inlet channel. When liquid moves along the inlet channel toward the installation cavity, the rotating plate adheres to the inner wall of the inlet channel; when the liquid stops moving, the rotating plate closes the inner wall of the inlet channel.

[0007] By adopting the above technical solution, in actual use, there may be situations where the gear pump fails or the pressure is insufficient. Such situations are prone to causing liquid backflow. Therefore, a rotating plate is set up. When the liquid is flowing normally, the rotating plate is attached to the inner wall of the liquid inlet channel, which reduces the impact on the liquid flow. When the gear pump fails or the pressure is insufficient, the liquid flow rate decreases or stops. At this time, the rotating plate rotates due to gravity and closes the liquid inlet channel, reducing liquid backflow and also reducing the possibility of liquid rushing out of the mounting cavity during subsequent maintenance.

[0008] Optionally, the outlet channel is located above the inlet channel, the rotating plate is located on the inner wall of the inlet channel near the outlet channel, the inner wall of the inlet channel is provided with a positioning groove, the positioning groove is located on the inner wall of the inlet channel away from the outlet channel, and the positioning groove restricts the rotating plate from rotating in a direction away from the mounting cavity.

[0009] By adopting the above technical solution and setting a positioning groove, the rotating plate is restricted from rotating in a direction away from the installation cavity. This reduces the situation where the rotating plate has difficulty closing the liquid inlet channel due to liquid, reduces liquid backflow, and makes the overall use more stable.

[0010] Optionally, the inner wall of the liquid inlet channel is provided with an installation groove, the rotating plate is disposed in the installation groove, the installation groove is located on the side of the positioning groove near the liquid outlet channel, the bottom of the installation groove is provided with a reset groove, the bottom of the reset groove is provided with a reset spring, and the elastic force of the reset spring restricts the rotating plate from moving towards the bottom of the installation groove.

[0011] By adopting the above technical solution and setting a reset spring, when the liquid stops flowing, the elastic force of the reset spring causes the rotating plate to rotate and abut against the positioning groove, reducing the possibility of the rotating plate getting stuck and facilitating the closing of the liquid inlet channel by the rotating plate.

[0012] Optionally, the rotating plate is provided with a magnetic component one, the bottom of the mounting groove is provided with a control groove, and the control groove is provided with a magnetic component two. The magnetic forces of the magnetic component one and the magnetic component two attract each other. When the liquid flows towards the mounting cavity, the attraction of the magnetic component one and the magnetic component two, together with the force of the liquid, causes the rotating plate to adhere to the bottom wall of the mounting groove. When the liquid stops flowing, the elastic force of the reset spring is greater than the attraction of the magnetic component one and the magnetic component two, and the rotating plate rotates and abuts against the wall of the positioning groove.

[0013] By adopting the above technical solution, magnetic component one and magnetic component two are set up. The attraction of magnetic component one and magnetic component two, combined with the force of the liquid, limits the rotation of the rotating plate away from the mounting cavity caused by the reset spring. This reduces the impact of the reset spring on the gear pump during use and makes the overall operation more stable.

[0014] Optionally, the gear pump body is provided with a filter chamber, the filter chamber is connected to a reset groove, the filter chamber is provided with an adjusting gear, the adjusting gear meshes with a filter element, the inner wall of the liquid inlet channel is provided with a sliding groove, the filter chamber is connected to the sliding groove, the filter element slides in the sliding groove, the end of the reset spring away from the bottom of the reset groove is provided with a control block, the end of the control block away from the bottom of the reset groove protrudes from the bottom wall of the mounting groove, the control block is connected to a control rod, and the control rod meshes with the adjusting gear; when the control block protrudes from the bottom wall of the mounting groove, the filter element is located in the sliding groove, and when the control block is located in the reset groove, the filter element protrudes from the inner wall of the liquid inlet channel.

[0015] By adopting the above technical solution, a filter element and an adjusting gear are set up. When the control block protrudes from the bottom wall of the mounting tank, the liquid does not flow. The filter element is located in the sliding tank. At this time, only the end of the filter element away from the bottom of the sliding tank plays the role of adsorbing liquid impurities. When the liquid flows and the rotating plate touches the bottom of the mounting tank, the rotating plate pushes the control block to move. The movement of the control block causes the adjusting gear to drive the filter element to move. The filter element protrudes from the inner wall of the liquid inlet channel, which improves the adsorption effect of impurities.

[0016] Optionally, the rotating plate is provided with a sliding rod, the rotating plate rotates on the sliding rod, the mounting groove is provided with a moving groove, the sliding rod slides in the moving groove, the outer wall of the gear pump body is provided with an adjusting component, the adjusting component is connected to the sliding rod, and the rotating plate is provided with a clearance groove for the control block to be embedded.

[0017] By adopting the above technical solution and setting an adjusting component, the movement of the sliding rod is controlled by the adjusting component, thereby controlling the movement of the rotating plate. In this way, it is easy to control the state of the filter element protruding from the inner wall of the liquid inlet channel according to the actual situation, and reduce the situation where impurities are re-detached due to friction with the sliding tank wall when the filter element moves.

[0018] Optionally, the rotating plate is provided with a magnetic component three, and the attraction between the magnetic component three and the magnetic component two is greater than the attraction between the magnetic component one and the magnetic component two. When the control block is embedded in the clearance groove, the magnetic component two and the magnetic component three are attracted to each other.

[0019] By adopting the above technical solution, a magnetic component three is set up, and the attraction between magnetic component three and magnetic component two is greater than that between magnetic component one and magnetic component two. This allows the filter to remain at the bottom of the sliding tank when the rotating plate is pressed against the wall of the installation tank, making it easier to determine whether filtration is needed based on the actual liquid pumped by the gear pump.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. A rotating plate is installed. When the liquid is flowing normally, the rotating plate is attached to the inner wall of the liquid inlet channel, which reduces the impact on the liquid flow. When the gear pump fails or the pressure is insufficient, the liquid flow rate decreases or stops. At this time, the rotating plate rotates due to gravity and closes the liquid inlet channel, reducing the backflow of liquid and also reducing the possibility of liquid rushing out of the installation cavity during subsequent maintenance.

[0022] 2. By setting up magnetic component one and magnetic component two, the attraction of magnetic component one and magnetic component two, combined with the force of the liquid, restricts the rotation of the rotating plate away from the mounting cavity caused by the return spring. This reduces the impact of the return spring on the gear pump during operation and makes the overall operation more stable.

[0023] 3. The filter element and adjusting gear are installed. When the control block protrudes from the bottom wall of the mounting tank, the liquid does not flow. The filter element is located in the sliding tank. At this time, only the end of the filter element away from the bottom of the sliding tank plays the role of adsorbing liquid impurities. When the liquid flows and the rotating plate touches the bottom of the mounting tank, the rotating plate pushes the control block to move. The movement of the control block causes the adjusting gear to drive the filter element to move. The filter element protrudes from the inner wall of the liquid inlet channel, which improves the adsorption effect of impurities. Attached Figure Description

[0024] Figure 1 This is an overall schematic diagram of an embodiment.

[0025] Figure 2 This is a cross-sectional schematic diagram of an embodiment, mainly showing the control gear set.

[0026] Figure 3 This is a cross-sectional schematic diagram of an embodiment, mainly showing the rotating plate.

[0027] Figure 4 yes Figure 3 An enlarged diagram of A in the diagram.

[0028] Figure 5 This is a cross-sectional schematic diagram of an embodiment, mainly showing the movable groove.

[0029] Explanation of reference numerals in the attached drawings: 1. Gear pump body; 2. Mounting cavity; 3. Inlet channel; 4. Outlet channel; 5. Control gear set; 6. Mounting groove; 7. Moving groove; 8. Sliding rod; 9. Adjusting component; 10. Rotating plate; 11. Clearing groove; 12. Magnetic component one; 13. Magnetic component two; 14. Magnetic component three; 15. Control groove; 16. Positioning groove; 17. Reset groove; 18. Filtering cavity; 19. Reset spring; 20. Control block; 21. Guide surface; 22. Adjusting gear; 23. Filter component; 24. Control rod; 25. Sliding groove. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0031] This application discloses a gear pump for preventing liquid backflow. (See also...) Figure 1 The system includes a gear pump body 1, which has a mounting cavity 2. The gear pump body 1 has an inlet channel 3 and an outlet channel 4, with the outlet channel 4 located above the inlet channel 3. Both the inlet channel 3 and the outlet channel 4 are connected to the mounting cavity 2. The mounting cavity 2 is equipped with a control gear set 5, which is used to drive the liquid flow. In actual use, the control gear set 5 includes a driving gear and a driven gear, with the driving gear meshing with the driven gear.

[0032] The inlet channel 3 has a square tube interior and an installation groove 6 located on the inner wall of the inlet channel 3 near the inner wall of the outlet channel 4. The groove 6 has a movable groove 7 extending towards the mounting cavity 2. The movable groove 7 has a sliding rod 8 that slides within the groove 7 in the direction of its extension. In practical use, the sliding rod 8 is equipped with a baffle plate to close the movable groove 7.

[0033] The outer wall of the gear pump body 1 is provided with an adjusting component 9, which is connected to a sliding rod 8. The adjusting component 9 is used to control the movement of the sliding rod 8. In actual use, the adjusting component 9 is an adjusting rod, which is connected to the sliding rod 8. The movement of the adjusting rod is used to drive the movement of the sliding rod 8.

[0034] The mounting slot 6 is equipped with a rotating plate 10, which rotates around a sliding rod 8. The axis of rotation of the rotating plate 10 is the same as the axis of the sliding rod 8. The rotating plate 10 has a clearance groove 11 located at one end of the rotating plate 10 near the bottom of the mounting slot 6. The rotating plate 10 has a magnetic component 12 and a magnetic component 14, both located at the end of the rotating plate 10 near the bottom of the mounting slot 6. The bottom of the mounting slot 6 has a control slot 15, which contains a magnetic component 13. The magnetic forces of magnetic component 12 and magnetic component 13 attract each other, and the magnetic force of magnetic component 13 attracts the magnetic force of magnetic component 14. In actual use, magnetic components 12, 13, and 14 are all magnetic plates. Alternatively, magnetic component 13 can be a magnetic plate, and magnetic components 12 and 14 can be made of iron.

[0035] The inner wall of the liquid inlet channel 3 is provided with a positioning groove 16, which is located on the side of the inner wall of the liquid inlet channel 3 away from the liquid outlet channel 4. The positioning groove 16 restricts the rotation of the rotating plate 10 away from the mounting cavity 2. When the liquid moves along the liquid inlet channel 3 towards the mounting cavity 2, the attraction of the magnetic component 12 and the magnetic component 13 and the force of the liquid cause the rotating plate 10 to adhere to the bottom wall of the mounting groove 6. When the liquid stops moving, the elastic force of the return spring 19 is greater than the attraction of the magnetic component 12 and the magnetic component 13, and the rotating plate 10 rotates and abuts against the groove wall of the positioning groove 16.

[0036] The bottom of the mounting slot 6 is provided with a reset slot 17. The gear pump body 1 is provided with a filter chamber 18, which is connected to the reset slot 17. The bottom of the reset slot 17 is provided with a reset spring 19. The elastic force of the reset spring 19 limits the movement of the rotating plate 10 towards the bottom of the mounting slot 6. The end of the reset spring 19 away from the bottom of the reset slot 17 is provided with a control block 20. The end of the control block 20 away from the bottom of the reset slot 17 protrudes from the bottom wall of the mounting slot 6. The control block 20 is used to embed into the relief slot 11. The control block 20 is provided with a guide surface 21. The guide surface 21 is located on the side of the control block 20 away from the bottom of the reset slot 17. The guide surface 21 moves in the direction away from the mounting cavity 2 towards the direction away from the bottom of the reset slot 17. The guide surface 21 is used to abut against the wall of the relief slot 11 to facilitate disengagement from the relief slot 11.

[0037] The filter chamber 18 is equipped with an adjusting gear 22, which meshes with a filter element 23. The inner wall of the liquid inlet channel 3 is provided with a sliding groove 25, in which the filter element 23 slides. A control block 20 is connected to a control rod 24, located at the end of the control block 20 near the bottom of the reset groove 17, and meshes with the adjusting gear 22. When the control block 20 protrudes from the bottom wall of the mounting groove 6, the filter element 23 is located within the sliding groove 25; when the control block 20 is located within the reset groove 17, the filter element 23 protrudes from the inner wall of the liquid inlet channel 3. In practical use, the filter element 23 can be made of activated carbon.

[0038] The implementation principle of a gear pump for preventing liquid backflow in this embodiment is as follows: In actual use, when the liquid moves along the inlet channel 3 towards the mounting cavity 2, the attraction of magnetic component 12 and magnetic component 13, combined with the force of the liquid, causes the rotating plate 10 to adhere to the bottom wall of the mounting groove 6. The rotating plate 10 causes the control block 20 to move towards the bottom of the reset groove 17. The movement of the control block 20 causes the adjusting gear 22 to drive the filter element 23 to protrude from the inner wall of the inlet channel 3. When the liquid stops moving, the elastic force of the reset spring 19 is greater than the attraction of magnetic component 12 and magnetic component 13, causing the rotating plate 10 to rotate and abut against the wall of the positioning groove 16.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gear pump for preventing liquid backflow, comprising a gear pump body (1), characterized in that: The gear pump body (1) is provided with an installation cavity (2), the gear pump body (1) is provided with an inlet channel (3) and an outlet channel (4), the inlet channel (3) and the outlet channel (4) are both connected to the installation cavity (2), the installation cavity (2) is provided with a control gear set (5), the control gear set (5) is used to drive the liquid flow, the inlet channel (3) is provided with a rotating plate (10), the rotating plate (10) rotates on the inner wall of the inlet channel (3); The outlet channel (4) is located above the inlet channel (3), and the rotating plate (10) is located on the side of the inner wall of the inlet channel (3) close to the outlet channel (4). The inner wall of the inlet channel (3) is provided with a positioning groove (16). The positioning groove (16) is located on the side of the inner wall of the inlet channel (3) away from the outlet channel (4). The positioning groove (16) restricts the rotating plate (10) from rotating in a direction away from the mounting cavity (2). The inner wall of the liquid inlet channel (3) is provided with an installation groove (6), the rotating plate (10) is provided in the installation groove (6), the installation groove (6) is located on the side of the positioning groove (16) close to the liquid outlet channel (4), the bottom of the installation groove (6) is provided with a reset groove (17), the bottom of the reset groove (17) is provided with a reset spring (19), the elastic force of the reset spring (19) restricts the rotating plate (10) from moving towards the bottom of the installation groove (6); The rotating plate (10) is provided with a magnetic component one (12), the bottom of the mounting groove (6) is provided with a control groove (15), the control groove (15) is provided with a magnetic component two (13), and the magnetic components one (12) and two (13) attract each other with their magnetic forces. When the liquid flows toward the mounting cavity (2), the attraction of magnetic component 1 (12) and magnetic component 2 (13) and the force of the liquid cause the rotating plate (10) to adhere to the bottom wall of the mounting groove (6). When the liquid stops flowing, the elastic force of the reset spring (19) is greater than the attraction of magnetic component 1 (12) and magnetic component 2 (13), and the rotating plate (10) rotates and abuts against the groove wall of the positioning groove (16). The gear pump body (1) is provided with a filter chamber (18), the filter chamber (18) is connected to the reset groove (17), the filter chamber (18) is provided with an adjusting gear (22), the adjusting gear (22) meshes with a filter element (23), the inner wall of the liquid inlet channel (3) is provided with a sliding groove (25), the filter chamber (18) is connected to the sliding groove (25), the filter element (23) slides in the sliding groove (25), the reset spring (19) is provided with a control block (20) at one end away from the bottom of the reset groove (17), the control block (20) at one end away from the bottom of the reset groove (17) protrudes from the bottom wall of the mounting groove (6), the control block (20) is connected to a control rod (24), the control rod (24) meshes with the adjusting gear (22); When the control block (20) protrudes from the bottom wall of the mounting groove (6), the filter element (23) is located in the sliding groove (25). When the control block (20) is located in the reset groove (17), the filter element (23) protrudes from the inner wall of the liquid inlet channel (3).

2. The gear pump for preventing liquid backflow according to claim 1, characterized in that: The rotating plate (10) is provided with a sliding rod (8), the rotating plate (10) rotates on the sliding rod (8), the mounting groove (6) is provided with a moving groove (7), the sliding rod (8) slides in the moving groove (7), the outer wall of the gear pump body (1) is provided with an adjusting member (9), the adjusting member (9) is connected to the sliding rod (8), the rotating plate (10) is provided with a clearance groove (11), the clearance groove (11) is for the control block (20) to be embedded.

3. The gear pump for preventing liquid backflow according to claim 2, characterized in that: The rotating plate (10) is provided with a magnetic component three (14). The attraction between the magnetic component three (14) and the magnetic component two (13) is greater than the attraction between the magnetic component one (12) and the magnetic component two (13). When the control block (20) is embedded in the clearance groove (11), the magnetic component two (13) and the magnetic component three (14) are attracted to each other.

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