Filter interface device capable of preventing backflow

Abstract

The utility model relates to a backflow prevention filter interface device, which relates to the technical field of slurry conveying and comprises a one-way pipe, an input pipe is inserted at one end of the one-way pipe, an output pipe is inserted at the other end of the one-way pipe, the output pipe is movably connected with the one-way pipe, and a corrugated pipe is sleeved on the output pipe. A filtering plate is fixedly arranged in the output pipe, a plurality of filtering holes are formed in the filtering plate, a blocking plate is movably arranged in the one-way pipe, a flowing gap exists between the side wall of the blocking plate and the inner wall of the one-way pipe, one side of the blocking plate is used for sealing the input pipe, and a supporting spring is fixedly arranged between the other side of the blocking plate and the filtering plate. The device has the effect of reducing bubbles entering the slurry.

Description

Technical Field

[0001] This utility model relates to the field of slurry conveying technology, and in particular to a filter interface device for preventing backflow. Background Technology

[0002] In the lithium battery production process, aqueous graphite slurry is effectively guided and transported to various designated work areas via a delivery pump along specially designed slurry pipelines, ensuring the smoothness and efficiency of the entire production process.

[0003] A related technology, Chinese patent CN213392727U, discloses a slurry conveying pump with a filtration structure. It includes a tail section, a motor mounted on one side of the tail section, a connecting shaft mounted on the motor's output shaft, and several blades mounted on the connecting shaft. A machine body is mounted on the other side of the tail section, with the blades located within the machine body. An inlet pipe and an outlet pipe are mounted on the machine body. First filter tubes are installed inside both the inlet and outlet pipes, and second filter tubes are installed inside the first filter tubes. Slurry in the upper-level pipeline is filtered through the first and second filter tubes in the inlet pipe before entering the machine body. Within the machine body, the motor-driven blades deliver the slurry to the outlet pipe for output. The slurry is then filtered through the first and second filter tubes in the outlet pipe before entering the lower-level pipeline.

[0004] In the process of developing this application, the inventors discovered that the technology has at least the following problems: In order to extend the service life of the motor, connecting shaft and blades, the motor is usually stopped periodically to make the delivery pump deliver slurry intermittently. However, there is a difference between high and low liquid levels in the pipeline, which can cause slurry backflow. This can easily form an air cavity inside the machine, thereby introducing air bubbles into the slurry and causing a decrease in slurry quality. Utility Model Content

[0005] To reduce the entry of air bubbles into the slurry, this application provides a backflow prevention filter interface device.

[0006] The backflow prevention filter interface device provided in this application adopts the following technical solution:

[0007] A backflow prevention filter interface device includes a one-way tube, with an input tube inserted at one end and an output tube inserted at the other end. The output tube is movably connected to the one-way tube, and a connecting corrugated pipe is sleeved on the output tube. A filter plate is fixedly installed inside the output tube, and a plurality of filter holes are formed on the filter plate. A blocking plate is movably installed inside the one-way tube, and a flow gap exists between the side wall of the blocking plate and the inner wall of the one-way tube. One side of the blocking plate is used to seal the input tube, and a support spring is fixedly installed between the other side of the blocking plate and the filter plate.

[0008] By adopting the above technical solution, the end of the input pipe located outside the one-way pipe is connected to the output end of the delivery pump, and the end of the connecting corrugated pipe furthest from the output pipe is connected to the downstream slurry pipeline. Then, according to the pressure of the slurry output by the delivery pump, the output pipe and the one-way pipe are moved relative to each other, adjusting the deformation of the support spring, thereby adjusting the interaction force between the plug plate and the end wall of the input pipe. When the output pipe and the one-way pipe move relative to each other, the connecting corrugated pipe expands and contracts, making the distance between the end of the input pipe located outside the one-way pipe and the end of the connecting corrugated pipe furthest from the output pipe less prone to change. When the delivery pump is working, the slurry is transported from the pump... The slurry enters the input pipe from the pump output end. The slurry pushes the plug plate to compress the support spring, causing the plug plate to separate from the input pipe. At this time, the flow gap is connected to the input pipe, and the slurry in the input pipe enters the output pipe along the flow gap. The slurry in the output pipe passes through the filter holes on the filter plate and enters the connecting bellows. The slurry in the connecting bellows enters the lower-level slurry pipeline. When the delivery pump stops for rest, the support spring returns to its original position, pressing the plug plate against the end wall of the input pipe. Thus, the plug plate seals the input pipe, making it difficult for the slurry flowing back from the lower-level slurry pipeline to flow back into the delivery pump from the input pipe, reducing the possibility of introducing air bubbles into the slurry.

[0009] Preferably, the inner wall of the one-way pipe is fixedly connected to the outer wall of the input pipe, the inner wall of the one-way pipe has an internal thread groove, the outer wall of the output pipe has an external thread groove, and the external thread groove and the internal thread groove are threadedly connected.

[0010] By adopting the above technical solution, the output tube and the unidirectional tube are rotated relative to each other, so that the output tube and the unidirectional tube can move relative to each other, thereby achieving the effect of movable connection between the output tube and the unidirectional tube.

[0011] Preferably, a connecting ring is fixedly provided at the end of the connecting corrugated pipe facing the one-way pipe. The connecting ring is sleeved on the output pipe. A connecting bearing is provided between the connecting ring and the output pipe. A sealing ring is fixedly provided on the outer wall of the output pipe. An inner sealing ring is fixedly provided on the side of the sealing ring facing the one-way pipe. The side of the connecting ring away from the one-way pipe abuts against the inner sealing ring.

[0012] By adopting the above technical solution, the connecting ring on the connecting bellows abuts against the inner sealing ring on the output pipe, thereby sealing the gap between the connecting bellows and the output pipe and enhancing the sealing effect between the output pipe and the connecting bellows.

[0013] Preferably, a sealing bellows is fitted onto the one-way pipe, one end of which is fixedly connected to the one-way pipe, and an abutment ring is fixedly provided at the other end of the sealing bellows. The abutment ring is fitted onto the output pipe, and an outer sealing ring is fixedly provided on the side of the connecting ring facing the one-way pipe. The side of the abutment ring away from the one-way pipe abuts against the outer sealing ring.

[0014] By adopting the above technical solution, the abutment ring on the sealing bellows abuts against the outer sealing ring on the output pipe, thereby sealing the gap between the sealing bellows and the output pipe. Since the connection interface between the output pipe and the one-way pipe is located inside the sealing bellows, the sealing effect between the output pipe and the one-way pipe is enhanced.

[0015] Preferably, an abutment spring is fitted on the output tube, with one end of the abutment spring abutting against the side of the abutment ring away from the outer sealing ring, and the other end of the abutment spring abutting against the end wall of the one-way tube facing the abutment ring.

[0016] By adopting the above technical solution, the abutment spring presses the abutment ring onto the outer sealing ring, making it difficult for the abutment ring to separate from the outer sealing ring, thereby reducing the possibility of sealing leakage between the sealing bellows and the output pipe.

[0017] Preferably, a guide hole is provided on the filter plate, a guide rod is inserted into the guide hole, the support spring is sleeved on the guide rod, and a plug plate is rotatably connected to one end of the guide rod.

[0018] By adopting the above technical solution, the blocking plate moves along the guide groove via the guide rod, and the support spring extends and retracts along the guide rod, thereby causing the blocking plate to move horizontally, reducing the possibility of the blocking plate shifting due to gravity, and thus reducing the possibility of accidental exposure of the input pipe port.

[0019] Preferably, a limiting plate is fixedly provided at the other end of the guide rod, and the limiting plate is used to abut against the filter plate.

[0020] By adopting the above technical solution, during the process of the blocking plate driving the guide rod to move along the guide hole, the limiting plate restricts the guide rod from slipping out of the guide hole.

[0021] Preferably, a rubber layer is fixedly provided on both the input pipe and the blocking plate on their opposite surfaces.

[0022] By adopting the above technical solution, on the one hand, when the input pipe and the plug plate collide, the rubber layer makes it less likely for the surfaces of the input pipe and the plug plate to be worn; on the other hand, when the plug plate abuts against the end wall of the input pipe, the rubber layer increases the sealing between the input pipe and the plug plate.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By setting up a one-way pipe, an input pipe, an output pipe, a connecting bellows, a filter plate, filter holes, a plug plate, a flow gap, and a support spring, when the delivery pump stops for rest, the support spring resets and the plug plate abuts against the end wall of the input pipe, thereby sealing the input pipe. The slurry flowing back from the downstream slurry pipeline is less likely to flow back from the input pipe into the delivery pump, reducing the possibility of introducing air bubbles into the slurry.

[0025] 2. By setting guide holes and guide rods, the accidental exposure of the input pipe port is reduced;

[0026] 3. By setting a rubber layer, wear between the input pipe and the plug plate surface is reduced, increasing the sealing performance between the input pipe and the plug plate. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of a backflow prevention filter interface device according to an embodiment of this application.

[0028] Figure 2 yes Figure 1 Enlarged view of section A.

[0029] Figure 3 This is a cross-sectional view illustrating the connection relationship between the blocking plate and the filter plate in the embodiments of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. One-way pipe; 11. Internal threaded groove; 12. Blocking plate; 13. Flow gap; 2. Inlet pipe; 3. Outlet pipe; 31. External threaded groove; 32. Filter plate; 33. Filter hole; 4. Support spring; 41. Guide rod; 42. Guide hole; 43. Limiting plate; 5. Connecting bellows; 51. Connecting ring; 52. Connecting bearing; 6. Inner sealing ring; 61. Sealing ring; 7. Sealing bellows; 71. Abutment ring; 72. Abutment spring; 8. Outer sealing ring; 9. Rubber layer. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0032] This application discloses an anti-backflow filter interface device. (Refer to...) Figures 1 to 3The system includes a one-way pipe 1, an input pipe 2, and an output pipe 3. One end of the input pipe 2 is connected to the output end of the delivery pump, and the other end of the input pipe 2 is inserted into the one-way pipe 1. The inner wall of the one-way pipe 1 is welded to the outer wall of the input pipe 2. One end of the output pipe 3 is inside the one-way pipe 1, and a connecting corrugated pipe 5 is sleeved on the other end of the output pipe 3. The end of the connecting corrugated pipe 5 away from the output pipe 3 is used to connect to the downstream slurry pipeline. An internal threaded groove 11 is formed on the inner wall of the one-way pipe 1, and an external threaded groove 31 is formed on the outer wall of the output pipe 3. The external threaded groove 31 is threadedly connected to the internal threaded groove 11. A filter plate 32 is welded inside the output pipe 3, and several filter holes 33 are formed on the filter plate 32. A blocking plate 12 is movably installed inside the one-way pipe 1, and a flow gap 13 exists between the side wall of the blocking plate 12 and the inner wall of the one-way pipe 1. A support spring 4 is welded between one side of the blocking plate 12 and the filter plate 32. The other side of the blocking plate 12 is used to seal the end of the input pipe 2 located inside the one-way pipe 1. Rubber layers 9 are installed on the opposite surfaces of the input pipe 2 and the blocking plate 12. According to the pressure of the slurry output by the delivery pump, the output pipe 3 and the one-way pipe 1 are rotated relative to each other, so that the output pipe 3 and the one-way pipe 1 move relative to each other, adjusting the deformation of the support spring 4, thereby adjusting the interaction force between the blocking plate 12 and the end wall of the input pipe 2. When the output pipe 3 and the one-way pipe 1 move relative to each other, the connecting bellows 5 extends and retracts, so that the distance between the end of the input pipe 2 located outside the one-way pipe 1 and the end of the connecting bellows 5 away from the output pipe 3 does not easily change. During pump operation, slurry enters the input pipe 2 from the pump output. The slurry pushes the plug plate 12, compressing the support spring 4 and separating the plug plate 12 from the input pipe 2. At this time, the flow gap 13 connects with the input pipe 2, allowing the slurry in the input pipe 2 to enter the output pipe 3 along the flow gap. The slurry in the output pipe 3 passes through the filter holes 33 on the filter plate 32 and enters the connecting bellows 5. The slurry in the connecting bellows 5 then enters the next-stage slurry pipeline. When the pump stops for rest, the support spring 4 returns to its original position, pressing the plug plate 12 against the end wall of the input pipe 2. This seals the input pipe 2, preventing slurry from flowing back from the next-stage slurry pipeline from the input pipe 2 back into the pump, thus reducing the introduction of air bubbles into the slurry. When the input pipe 2 collides with the plug plate 12, the rubber layer 9 reduces wear on the surfaces of the input pipe 2 and the plug plate 12. When the plug plate 12 abuts against the end wall of the input pipe 2, the rubber layer 9 increases the seal between the input pipe 2 and the plug plate 12.

[0033] To enhance the sealing effect between the output pipe 3 and the connecting bellows 5, refer to Figure 1 and Figure 2A connecting ring 51 is installed on the end of the connecting bellows 5 facing the one-way pipe 1. The connecting ring 51 is sleeved on the output pipe 3, and a connecting bearing 52 is installed between the connecting ring 51 and the output pipe 3. A sealing ring 61 is welded to the outer wall of the output pipe 3. An inner sealing ring 6 is installed on the side of the sealing ring 61 facing the one-way pipe 1, and the side of the connecting ring 51 away from the one-way pipe 1 abuts against the inner sealing ring 6. The connecting ring 51 on the connecting bellows 5 abuts against the inner sealing ring 6 on the output pipe 3, thereby sealing the gap between the connecting bellows 5 and the output pipe 3 and enhancing the sealing effect between the output pipe 3 and the connecting bellows 5.

[0034] To enhance the sealing effect between output pipe 3 and one-way pipe 1, refer to... Figure 1 and Figure 2 A sealing bellows 7 is fitted onto the one-way pipe 1. One end of the sealing bellows 7 is welded to the one-way pipe 1, and the other end is welded to an abutment ring 71, which is fitted onto the output pipe 3. An outer sealing ring 8 is installed on the side of the connecting ring 51 facing the one-way pipe 1, and the side of the abutment ring 71 away from the one-way pipe 1 abuts against the outer sealing ring 8. An abutment spring 72 is fitted onto the output pipe 3. One end of the abutment spring 72 abuts against the side of the abutment ring 71 away from the outer sealing ring 8, and the other end of the abutment spring 72 abuts against the end wall of the one-way pipe 1 facing the abutment ring 71. The abutment spring 72 presses the abutment ring 71 against the outer sealing ring 8, making it difficult for the abutment ring 71 to separate from the outer sealing ring 8. The abutment ring 71 on the sealing bellows 7 abuts against the outer sealing ring 8 on the output pipe 3, thereby sealing the gap between the sealing bellows 7 and the output pipe 3. Since the connection interface between the output pipe 3 and the one-way pipe 1 is located inside the sealing bellows 7, the sealing effect between the output pipe 3 and the one-way pipe 1 is enhanced, and the leakage between the sealing bellows 7 and the output pipe 3 is reduced.

[0035] To reduce the chance of accidental exposure of input tube 2 port, refer to Figure 1 and Figure 3 A guide hole 42 is provided on the filter plate 32, and a guide rod 41 is inserted into the guide hole 42. A support spring 4 is sleeved on the guide rod 41. One end of the guide rod 41 is rotatably connected to a blocking plate 12, and the other end of the guide rod 41 is welded to a limiting plate 43, which is used to abut against the filter plate 32. The blocking plate 12 moves along the guide groove via the guide rod 41, and the support spring 4 extends and retracts along the guide rod 41, thereby allowing the blocking plate 12 to translate, reducing the possibility of the blocking plate 12 shifting due to gravity, and thus reducing the possibility of accidental exposure of the input pipe 2 port. During the process of the blocking plate 12 driving the guide rod 41 to move along the guide hole 42, the limiting plate 43 prevents the guide rod 41 from slipping out of the guide hole 42.

[0036] The implementation principle of the anti-backflow filter interface device in this application embodiment is as follows: When the delivery pump is working, the slurry enters the input pipe 2 from the output end of the delivery pump. The slurry pushes the plug plate 12 to compress the support spring 4, causing the plug plate 12 to separate from the input pipe 2. At this time, the flow gap 13 is connected to the input pipe 2, and then the slurry in the input pipe 2 enters the output pipe 3 along the flow gap. The slurry in the output pipe 3 passes through the filter holes 33 on the filter plate 32 and enters the connecting bellows 5. The slurry in the connecting bellows 5 enters the lower-level slurry pipeline. When the delivery pump stops for rest, the support spring 4 returns to its original position, and the plug plate 12 abuts against the end wall of the input pipe 2, thereby sealing the input pipe 2. The slurry flowing back from the lower-level slurry pipeline is not easily backflowed from the input pipe 2 into the delivery pump, reducing the possibility of introducing air bubbles into the slurry.

[0037] 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 backflow prevention filter interface device, comprising a one-way pipe (1), wherein an input pipe (2) is inserted at one end of the one-way pipe (1), and an output pipe (3) is inserted at the other end of the one-way pipe (1), characterized in that: The output pipe (3) is movably connected to the one-way pipe (1). A connecting corrugated pipe (5) is sleeved on the output pipe (3). A filter plate (32) is fixedly installed inside the output pipe (3). Several filter holes (33) are opened on the filter plate (32). A blocking plate (12) is movably installed inside the one-way pipe (1). There is a flow gap (13) between the side wall of the blocking plate (12) and the inner wall of the one-way pipe (1). One side of the blocking plate (12) is used to seal the input pipe (2). A support spring (4) is fixedly installed between the other side of the blocking plate (12) and the filter plate (32).

2. The backflow prevention filter interface device according to claim 1, characterized in that: The inner wall of the one-way pipe (1) is fixedly connected to the outer wall of the input pipe (2). An internal thread groove (11) is opened on the inner wall of the one-way pipe (1), and an external thread groove (31) is opened on the outer wall of the output pipe (3). The external thread groove (31) is threadedly connected to the internal thread groove (11).

3. The backflow prevention filter interface device according to claim 2, characterized in that: A connecting ring (51) is fixedly installed at the end of the connecting corrugated pipe (5) facing the one-way pipe (1). The connecting ring (51) is sleeved on the output pipe (3). A connecting bearing (52) is provided between the connecting ring (51) and the output pipe (3). A sealing ring (61) is fixedly installed on the outer wall of the output pipe (3). An inner sealing ring (6) is fixedly installed on the side of the sealing ring (61) facing the one-way pipe (1). The side of the connecting ring (51) away from the one-way pipe (1) abuts against the inner sealing ring (6).

4. The backflow prevention filter interface device according to claim 3, characterized in that: A sealing bellows (7) is fitted onto the one-way pipe (1). One end of the sealing bellows (7) is fixedly connected to the one-way pipe (1). An abutment ring (71) is fixedly installed at the other end of the sealing bellows (7). The abutment ring (71) is fitted onto the output pipe (3). An outer sealing ring (8) is fixedly installed on the side of the connecting ring (51) facing the one-way pipe (1). The side of the abutment ring (71) away from the one-way pipe (1) abuts against the outer sealing ring (8).

5. The backflow prevention filter interface device according to claim 4, characterized in that: An abutment spring (72) is fitted on the output tube (3). One end of the abutment spring (72) abuts against the side of the abutment ring (71) away from the outer sealing ring (8), and the other end of the abutment spring (72) abuts against the end wall of the one-way tube (1) facing the abutment ring (71).

6. The backflow prevention filter interface device according to claim 2, characterized in that: The filter plate (32) has a guide hole (42), a guide rod (41) is inserted into the guide hole (42), the support spring (4) is sleeved on the guide rod (41), and a blocking plate (12) is rotatably connected to one end of the guide rod (41).

7. The backflow prevention filter interface device according to claim 6, characterized in that: The other end of the guide rod (41) is fixedly provided with a limiting plate (43), which is used to abut against the filter plate (32).

8. The backflow prevention filter interface device according to claim 1, characterized in that: A rubber layer (9) is fixedly provided on the opposite surfaces of the input pipe (2) and the blocking plate (12).

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