Filter structure and cam rotor pump thereof

Abstract

The utility model discloses a filter structure and cam rotor pump thereof relates to rotor pump field, including filter unit, filter unit installs on cam rotor pump, and filter unit includes conveying unit, connecting pipe and filter piece, and is provided with movable filter board in the conveying pipe, and with the filter piece in connecting pipe constitutes two -stage filter system, when the flow rate reduces when filter board because of the impurity accumulation leads, and system pressure can guide part fluid to carry out partial flow filtration through filter piece, has realized the automatic distribution and shift of filter load, when two -stage filter all faces the risk of blockage, and the increased fluid pressure will accelerate filtration rate instead, forms a temporary pressure buffer and self -enhancing filter mechanism, greatly prolongs effective filtration time, and the maintenance frequency is reduced.

Description

Technical Field

[0001] This utility model relates to the field of rotor pumps, and in particular to a filter structure and its cam rotor pump. Background Technology

[0002] Cam rotor pumps are used in wastewater treatment, petrochemical, food and pharmaceutical industries.

[0003] Existing technologies disclose several invention patents related to cam rotor pumps. Chinese patent CN210637230U discloses a cam rotor pump that is not prone to crystallization. The pump includes a pump body with an inlet pipe and an outlet pipe, and a base. Filter components are connected to both the inlet and outlet pipes. The filter components are fixedly connected to the base via a support frame. Each filter component includes a connecting cover, a filter screen, and a liquid guide cover. The connecting cover is connected to the inlet and outlet pipes, the filter screen is located inside the connecting cover, and the liquid guide cover is threaded onto the connecting cover. This invention uses a base to support and fix the pump body, effectively ensuring the structural stability of the pump body. Furthermore, fixing the base to the ground effectively ensures the overall robustness of the cam rotor pump, reducing mechanical vibration and noise pollution during operation. Simultaneously, by installing filter components at the inlet and outlet pipes, the liquid entering and leaving the pump body is filtered, effectively preventing impurities and particles from entering the pump body or flowing into other pipes or equipment, thus avoiding safety hazards.

[0004] The solution has filter components installed at the inlet and outlet pipes to filter the liquid entering and leaving the pump body. However, as the impurities trapped on the filter screen increase, the filter channels will gradually become blocked, resulting in a significant increase in the resistance of the fluid passing through the filter screen.

[0005] Significantly increasing the pump's load leads to increased energy consumption and may even damage the pump. Secondly, the filtration efficiency will drop sharply, affecting the overall processing capacity of the system.

[0006] To remove these impurities, frequent shutdowns and filter disassembly for cleaning or replacement are necessary, which not only severely impacts the continuity of production or processing but also significantly increases maintenance workload and operating costs.

[0007] Therefore, we propose a filter structure and its cam rotor pump to solve the above problems. Utility Model Content

[0008] The purpose of this invention is to provide a filter structure and its cam rotor pump to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a filter structure and its cam rotor pump, comprising a filter unit, wherein the filter unit is mounted on the cam rotor pump, and the filter unit includes a conveying unit, a connecting pipe and a filter element; The conveying unit includes a conveying pipe and a first filter port opened on the conveying pipe, the first filter port being used to connect to the liquid inlet pipe. The conveying pipe is also provided with a second filter port and a circulation inlet, and the two ends of the connecting pipe are respectively connected to the second filter port and the circulation inlet; the filter element is installed in the second filter port, and the end of the conveying pipe is provided with a conveying port to output the filtered fluid; A filter plate is slidably connected inside the conveying pipe, and a sliding rod is fixedly connected to the filter plate, the sliding rod slidingly passing through the conveying pipe.

[0010] Preferably, a sealing ring is provided at the contact portion between the conveying pipe and the sliding rod.

[0011] Preferably, a drive cylinder is installed on the conveying pipe, and the output end of the drive cylinder is connected to the end of the sliding rod that extends out of the conveying pipe.

[0012] Preferably, the two ends of the connecting pipe are respectively provided with an upper circulation port and a lower circulation port, the upper circulation port is used to connect with the second filter port, and the lower circulation port is connected with the circulation inlet.

[0013] Preferably, the end of the filter element is provided with a snap-fit ​​seat, and the second filter port is provided with a snap-fit ​​groove, and the snap-fit ​​seat is snapped and fixed in the snap-fit ​​groove.

[0014] Preferably, the pump includes a rotor pump body, which includes an end cover and a pump body. Two rotor shafts are rotatably disposed between the end cover and the pump body. A limiting rod is provided at the end of the rotor shaft that extends into the end cover. An impeller is mounted on the limiting rod. The two impellers mesh with each other. One of the rotor shafts passes through the pump body and is connected to the motor output end.

[0015] Preferably, each rotor shaft is sequentially fitted with a first bearing, a meshing gear, and a second bearing, with the first bearing located inside the pump body and the two meshing gears meshing with each other.

[0016] Preferably, the end cap has four mounting ports for assembling a sealing cap.

[0017] Preferably, the end cap is provided with an inlet and an outlet, and the outlet is connected to the conveying port on the conveying pipe.

[0018] The technical effects and advantages of this utility model are as follows: 1. A movable filter plate is installed inside the delivery pipe, forming a two-stage filtration system with the filter element in the connecting pipe. When the flow rate of the filter plate decreases due to the accumulation of impurities, the system pressure will guide some of the fluid through the filter element for diversion filtration, realizing the automatic distribution and transfer of filtration load. When both stages of filtration face the risk of clogging, the increased fluid pressure will actually accelerate the filtration rate, forming a temporary pressure buffer and self-reinforcing filtration mechanism, which greatly extends the effective filtration time and reduces the maintenance frequency.

[0019] 2. Under the action of the pressure sensor, the pressure at the filter plate is monitored. When the pressure in the filter plate and filter element increases to a critical value, the drive cylinder is activated to control the sliding rod to move the filter plate, adjust the volume of the filter plate and filter element, disturb the fluid, loosen the filter cake, and redistribute the pressure. This achieves automatic relief of the blockage problem without cleaning or stopping the machine, ensuring that the cam rotor pump can operate continuously and stably for a long time.

[0020] 3. When the filter plate is driven to the end of its stroke, it indicates that the automatic unclogging adjustment has reached its limit and manual intervention is required for thorough cleaning. At this time, the system will issue a warning signal to prompt the operator to perform maintenance, effectively avoiding the risk of damage to the pump body or pipeline due to excessive pressure inside the delivery pipe caused by complete blockage of the filtration system. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the filter unit structure of this utility model; Figure 3 This is an exploded view of the filter unit of this utility model; Figure 4 This is a schematic diagram of the conveying unit structure of this utility model; Figure 5 This is a schematic diagram showing the connection between the filter unit and the rotor pump body of this utility model; Figure 6 This is a schematic diagram of the internal structure of the rotor pump of this utility model.

[0022] In the diagram: 1. Filtering unit; 11. Conveying unit; 111. Conveying pipe; 112. First filter port; 113. Second filter port; 114. Circulation inlet; 115. Conveying port; 12. Connecting pipe; 121. Upper circulation port; 122. Lower circulation port; 13. Drive cylinder; 131. Sliding rod; 132. Filter plate; 133. Sealing ring; 14. Filter element; 141. Snap-fit ​​seat; 142. Snap-fit ​​groove; 2. Rotary pump body; 21. End cover; 211. Feed inlet; 212. Discharge port; 22. Pump body; 3. Impeller; 4. Rotor shaft; 41. First bearing; 42. Meshing gear; 43. Second bearing; 44. Limiting rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model provides, for example Figures 1-6 The filter structure shown herein and its cam rotor pump include a filter unit 1, which is mounted on the cam rotor pump. The filter unit 1 includes a conveying unit 11, a connecting pipe 12, and a filter element 14. The delivery unit 11 includes a delivery pipe 111 and a first filter port 112 opened on the delivery pipe 111. The first filter port 112 is used to connect to the liquid inlet pipe. The conveying pipe 111 is also provided with a second filter port 113 and a circulation inlet 114. The two ends of the connecting pipe 12 are respectively connected to the second filter port 113 and the circulation inlet 114. A filter element 14 is installed in the second filter port 113, and a conveying port 115 is provided at the end of the conveying pipe 111 for outputting the filtered fluid. A filter plate 132 is slidably connected inside the conveying pipe 111, and a sliding rod 131 is fixedly connected to the filter plate 132. The sliding rod 131 slides through the conveying pipe 111.

[0025] When the filter plate 132 reduces the filtration flow rate due to the accumulation of impurities, under the condition that the driving force of the cam rotor pump is constant, the fluid in the delivery pipe 111 increases, and part of the fluid is diverted and filtered through the filter element 14 at the second filter port 113. When the filter element 14 becomes clogged due to prolonged filtration, and the combined filtration rate with the filter plate 132 is lower than the delivery rate of the cam rotor pump, the fluid pressure between the filter element 14 and the filter plate 132 increases, thereby accelerating the filtration rate. A pressure sensor is installed on the sliding rod 131 to monitor the fluid pressure on the filter plate 132; When the pressure exceeds the set threshold, the sliding rod 131 is driven to move, thereby moving the filter plate 132 to adjust the fluid pressure between it and the second filter port 113, so as to avoid the pressure in the delivery pipe 111 being too high and affecting normal operation. When the filter plate 132 is driven to the end of its stroke, it indicates that the automatic unclogging adjustment has reached its limit and manual intervention is required for thorough cleaning. At this time, the system will issue a warning signal to prompt the operator to perform maintenance, effectively avoiding the risk of damage to the pump body or pipeline due to excessive internal pressure in the delivery pipe 111 caused by complete blockage of the filtration system.

[0026] A movable filter plate 132 is installed in the delivery pipe 111, and together with the filter element 14 in the connecting pipe 12, they form a two-stage filtration system. When the flow rate of the filter plate 132 decreases due to the accumulation of impurities, the system pressure will guide some of the fluid through the filter element 14 for diversion filtration, realizing the automatic distribution and transfer of filtration load. When both stages of filtration face the risk of clogging, the increased fluid pressure will accelerate the filtration rate, forming a temporary pressure buffer and self-reinforcing filtration mechanism, which greatly extends the effective filtration time and reduces the maintenance frequency.

[0027] Example 1: A sealing ring 133 is provided at the contact part between the conveying pipe 111 and the sliding rod 131.

[0028] The sliding rod 131 is sealed to the delivery pipe 111 by the sealing ring 133.

[0029] A drive cylinder 13 is installed on the conveying pipe 111, and the output end of the drive cylinder 13 is connected to the end of the sliding rod 131 that passes through the conveying pipe 111.

[0030] When the pressure sensor detects that the pressure is close to the critical value, the drive cylinder 13 is activated, which moves the filter plate 132 to adjust the volume of the cavity between it and the filter element 14, thereby reducing the fluid pressure.

[0031] Under the action of the pressure sensor, the pressure at the filter plate 132 is monitored. When the pressure in the filter plate 132 and the filter element 14 increases to a critical value, the drive cylinder 13 is activated to control the sliding rod 131 to move the filter plate 132, adjust the volume of the filter plate 132 and the filter element 14, disturb the fluid, loosen the filter cake, and redistribute the pressure. This achieves automatic relief of the blockage problem without cleaning or stopping the machine, ensuring that the cam rotor pump can operate continuously and stably for a long time.

[0032] The two ends of the connecting pipe 12 are respectively provided with an upper circulation port 121 and a lower circulation port 122. The upper circulation port 121 is used to connect with the second filter port 113, and the lower circulation port 122 is connected with the circulation inlet 114.

[0033] The fluid filtered by the filter element 14 enters the connecting pipe 12, and is transported to the conveying pipe 111 through the lower circulation port 122 and the circulation inlet 114. The filtered fluid is then transported through the conveying port 115 at the end of the conveying pipe 111.

[0034] The filter element 14 is provided with a snap-fit ​​seat 141 at its end, and a snap-fit ​​groove 142 is provided in the second filter port 113, and the snap-fit ​​seat 141 is snapped and fixed in the snap-fit ​​groove 142.

[0035] The filter element 14 is installed through the second filter port 113 and the upper circulation port 121. The snap-fit ​​seat 141 is fixedly installed at the connection between the second filter port 113 and the upper circulation port 121, and then the filter element 14 is installed in the second filter port 113 to filter the fluid.

[0036] Example 2: Includes a rotor pump body 2, which includes an end cover 21 and a pump body 22. Two rotor shafts 4 are rotatably arranged between the end cover 21 and the pump body 22. A limiting rod 44 is provided at the end of the rotor shaft 4 that extends into the end cover 21. An impeller 3 is installed on the limiting rod 44. The two impellers 3 mesh with each other. One of the rotor shafts 4 passes through the pump body 22 and is connected to the motor output end.

[0037] The rotor shaft 4 is driven by a motor to rotate in the pump body 22 and end cover 21, which in turn drives the impeller 3 to rotate in the end cover 21 to transport fluid.

[0038] Each rotor shaft 4 is sequentially fitted with a first bearing 41, a meshing gear 42, and a second bearing 43. The first bearing 41 is located inside the pump body 22, and the two meshing gears 42 mesh with each other.

[0039] One of the rotor shafts 4 is driven to rotate by a motor. Through two meshing gears 42, the two rotor shafts 4 rotate simultaneously. Under the action of the first bearing 41 and the second bearing 43, the stability of the rotor shaft 4 in the transmission between the pump body 22 and the end cover 21 is improved, thereby improving the stability of the impeller 3 transmission.

[0040] The end cap 21 has four mounting ports for assembling sealing caps.

[0041] The sealing space is formed by the sealing cover and the end cover 21, and the fluid is transported by the impeller 3 through the transmission in the sealing space.

[0042] The end cap 21 is provided with a feed inlet 211 and a discharge outlet 212, and the discharge outlet 212 is connected to the conveying port 115 on the conveying pipe 111.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A filter structure, characterized in that, Includes a filter unit (1), which is mounted on a cam rotor pump. The filter unit (1) includes a conveying unit (11), a connecting pipe (12), and a filter element (14). The delivery unit (11) includes a delivery pipe (111) and a first filter port (112) opened on the delivery pipe (111), the first filter port (112) being used to connect to the liquid inlet pipe. The conveying pipe (111) is also provided with a second filter port (113) and a circulation inlet (114), and the two ends of the connecting pipe (12) are respectively connected to the second filter port (113) and the circulation inlet (114); the filter element (14) is installed in the second filter port (113), and the end of the conveying pipe (111) is provided with a conveying port (115) to output the filtered fluid; A filter plate (132) is slidably connected inside the conveying pipe (111), and a sliding rod (131) is fixedly connected to the filter plate (132). The sliding rod (131) slides through the conveying pipe (111).

2. The filter structure according to claim 1, characterized in that, A sealing ring (133) is provided at the contact portion between the conveying pipe (111) and the sliding rod (131).

3. The filter structure according to claim 1, characterized in that, A drive cylinder (13) is installed on the conveying pipe (111), and the output end of the drive cylinder (13) is connected to the end of the sliding rod (131) that passes through the conveying pipe (111).

4. The filter structure according to claim 1, characterized in that, The connecting pipe (12) is provided with an upper circulation port (121) and a lower circulation port (122) at both ends. The upper circulation port (121) is used to connect with the second filter port (113), and the lower circulation port (122) is connected with the circulation inlet (114).

5. A filter structure according to claim 1, characterized in that, The filter element (14) is provided with a snap-fit ​​seat (141) at its end, and a snap-fit ​​groove (142) is provided in the second filter port (113), and the snap-fit ​​seat (141) is snapped and fixed in the snap-fit ​​groove (142).

6. A cam rotor pump, with a filtration structure according to any one of claims 1-5, characterized in that, The pump includes a rotor pump body (2), which includes an end cover (21) and a pump body (22). Two rotor shafts (4) are rotatably disposed between the end cover (21) and the pump body (22). A limiting rod (44) is provided at the end of the rotor shaft (4) that extends into the end cover (21). An impeller (3) is installed on the limiting rod (44). The two impellers (3) mesh with each other. One of the rotor shafts (4) passes through the pump body (22) and is connected to the motor output end.

7. The cam rotor pump according to claim 6, characterized in that, Each rotor shaft (4) is sequentially fitted with a first bearing (41), a meshing gear (42), and a second bearing (43). The first bearing (41) is located inside the pump body (22), and the two meshing gears (42) mesh with each other.

8. The cam rotor pump according to claim 6, characterized in that, The end cap (21) is provided with four mounting ports, which are used to assemble the sealing cap.

9. The cam rotor pump according to claim 6, characterized in that, The end cap (21) is provided with an inlet (211) and an outlet (212), and the outlet (212) is connected to the conveying port (115) on the conveying pipe (111).

Images