Self-filtering magnetic drive pump

Abstract

The invention relates to the field of magnetic pumps, and particularly discloses a self-filtering magnetic pump which comprises a motor and a pump body, the pump body is fixed to the end of the motor, an impeller in the pump body is fixed to a rotating shaft of the motor, and a filtering device is fixed to the other end of the pump body and communicates with a water inlet of the pump body. The filtering device comprises a pipe body and a plurality of filter screens arranged in the pipe body, and the cross section of fluid in the pipe body is consistent with that of the filter screens when the fluid passes through the filter screens. The multiple filter screens filter impurities in fluid, it is ensured that the fluid entering the pump body is kept pure, the impurities in the fluid are prevented from entering the pump body and being clamped in a gap between the inner magnetic rotor and the isolation sleeve, it is ensured that rotation of the inner magnetic rotor is not affected, and the obliquely-arranged filter screens increase the contact area between the filter screens and the fluid; the filter screen can slide out of the pipe body along the guide grooves along with the clamping plates, so that the filter screen is convenient to clean, and the filtering effect of the filter screen is ensured.

Description

Technical Field

[0001] The present invention relates to the field of magnetic pumps, and specifically to a self-filtering magnetic pump. Background Art

[0002] Magnetic pumps belong to a branch of the water pump field and are a new product that applies the working principle of permanent magnet couplings to centrifugal pumps. It is mainly driven by an electric motor to rotate an external drive magnet. Through the magnetic attraction between the external drive magnet and the internal magnetic rotor, the internal magnetic rotor rotates, and the impeller connected to the internal magnetic rotor rotates accordingly. The internal magnetic rotor and the external drive magnet are separated by a isolation sleeve to ensure the sealing of the pump body of the magnetic pump. To ensure the magnetic force between the internal magnetic rotor and the external drive magnet, the gap between the internal magnetic rotor and the isolation sleeve needs to be small enough. This leads to the situation that when there are impurities in the fluid pumped by the magnetic pump, the impurities in the fluid are easily stuck in the gap between the internal magnetic rotor and the isolation sleeve, thereby affecting the normal rotation of the internal magnetic rotor. Summary of the Invention

[0003] The purpose of the present invention is to provide a self-filtering magnetic pump to overcome the above-mentioned defects in the prior art.

[0004] A self-filtering magnetic pump according to the present invention includes an electric motor and a pump body. The pump body is fixed to the end of the electric motor. The impeller in the pump body is fixed to the rotating shaft of the electric motor. A filtering device is fixed to the other end of the pump body. The filtering device is communicated with the water inlet of the pump body. The filtering device includes a pipe body and a plurality of filter meshes arranged in the pipe body. When the fluid in the pipe body passes through the filter meshes, the cross-section is the same as that of the filter meshes.

[0005] Through the above technical solution, a plurality of filter meshes filter the impurities in the fluid, ensuring that the fluid entering the pump body remains pure, preventing the impurities in the fluid from entering the pump body and getting stuck in the gap between the internal magnetic rotor and the isolation sleeve, and ensuring that the rotation of the internal magnetic rotor is not affected.

[0006] Preferably, the pipe body is a cylindrical shape composed of a first half pipe and a second half pipe. Two connecting flanges are fixedly provided at both ends of the first half pipe. A through hole is opened at the center of the connecting flange. The diameter of the through hole is smaller than the inner diameter of the pipe body. A connecting ring is fixed in the through hole. One end of the connecting ring close to the pipe body extends radially outward to form an extended ring. One end face of the extended ring abuts against the connecting flange, and a sealing ring that abuts against the inner wall of the pipe body is fixedly provided on the other end face.

[0007] Through the above technical solution, the settings of the sealing ring, the filter mesh, and the extended ring are beneficial to increasing the sealing performance between the second half pipe and the connecting flange.

[0008] Preferably, the filter mesh is inclined along the water flow direction from bottom to top.

[0009] Through the above technical solution, the inclined filter screen increases its contact area with the fluid, thereby enhancing the filtering effect of the filter screen.

[0010] Preferably, a plurality of guide plates are fixedly provided on the inner walls of the first half pipe and the second half pipe. The guide plates on the first half pipe and the second half pipe are aligned with each other, and a gap equal in width to the filter screen is formed between two opposite guide plates. The filter screen is disposed between two opposite guide plates, and the three together form an ellipse, and the projection of the ellipse and the inner wall of the pipe on the connecting flange coincides.

[0011] Through the above technical solution, the arrangement of the guide plates is conducive to fixing the filter screen and ensuring its stability during the filtering process.

[0012] Preferably, a plurality of splint seats are fixedly provided on the outer periphery of the pipe. Each splint seat is composed of a first half seat and a second half seat. The first half seat is fixed on the outer periphery of the first half pipe, and the second half seat is fixed on the outer periphery of the second half pipe. A guide groove that is recessed along the inclined direction of the splint seat and penetrates through the pipe and the guide plate is formed on the upper end surface of the splint seat. A splint is slidably connected in the guide groove, and the filter screen is fixed in the splint.

[0013] Through the above technical solution, the filter screen can slide out of the pipe along with the splint along the guide groove, facilitating the cleaning of the filter screen.

[0014] Preferably, a resistance-reducing port that is recessed upward is formed at the lower end of the splint. When the filter screen is pulled out of the pipe upward along with the splint, the upper side wall of the resistance-reducing port is aligned with the inner wall of the pipe.

[0015] Through the above technical solution, when the filter screen is pulled out of the pipe, the blockage of the splint to the fluid in the pipe is reduced, and the flow loss of the fluid is reduced.

[0016] Preferably, the splint is formed by overlapping two half plates. Filter water ports that penetrate through their thickness are formed in both half plates. Engaging grooves that surround the filter water ports in a circle are formed on the surfaces of the two half plates that are close to each other. The filter screen is fitted in the engaging grooves.

[0017] Through the above technical solution, it is conducive to the repair and replacement of the filter screen.

[0018] Preferably, a splint head is sleeved on the upper end of the splint. The splint head abuts against the upper end surface of the splint seat. Two symmetrically arranged limiting blocks are fixedly provided on one side edge of the splint seat. A limiting rod is slidably connected between the two limiting blocks. A limiting portion is fixedly provided at the lower end of the limiting rod, and the limiting portion can abut against the lower end surface of the limiting block. The upper end of the limiting rod is fixed on the splint head, and the length of the limiting rod is equal to the length of the filter screen.

[0019] Through the above technical solution, the limiting block restricts the sliding distance of the limiting part, thereby restricting the sliding distance of the splint head, and further preventing the splint from being completely pulled out of the splint seat.

[0020] Preferably, connecting plates are provided between adjacent two splint seats and between the splint seat and the connecting flange. The connecting plate is composed of a first side plate and a second side plate that overlap each other. The first side plate is fixedly arranged on the upper and lower sides of the first half pipe, and the second side plate is fixedly arranged on the upper and lower sides of the second half pipe. The first side plate and the second side plate are fixedly connected by bolts.

[0021] Through the above technical solution, it is beneficial to the disassembly and assembly between the first half pipe and the second half pipe.

[0022] The beneficial effects of the present invention are as follows: A plurality of filter meshes filter impurities in the fluid, ensuring that the fluid entering the pump body remains pure, preventing impurities in the fluid from entering the pump body and getting stuck in the gap between the inner magnetic rotor and the isolation sleeve, ensuring that the rotation of the inner magnetic rotor is not affected. The inclined filter mesh increases the contact area between it and the fluid, thereby increasing the filtering effect of the filter mesh. The filter mesh can slide along the guide groove to the outside of the pipe body with the splint, so as to facilitate the cleaning of the filter mesh, thereby ensuring the filtering effect of the filter mesh. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the structural schematic diagram of the present invention; Figure 2 is the exploded view of the present invention; Figure 3 is the exploded view of the filtering device in the present invention; Figure 4 is the structural schematic diagram of the first half pipe in the present invention; Figure 5 is the present invention Figure 4 magnified schematic diagram at A in; Figure 6 is the structural schematic diagram of the splint in the present invention; Figure 7 is the sectional view schematic diagram of the splint in the present invention.

[0024] In the figure: 10. Motor; 20. Pump body; 30. Connecting flange; 301. Through port; 40. Pipe body; 40a. First half pipe; 40b. Second half pipe; 401. Guide plate; 41. Connecting plate; 41a. First side plate; 41b. Second side plate; 42. Clamping plate seat; 42a. First half seat; 42b. Second half seat; 421. Guide groove; 422. Limit block; 50. Sealing ring; 51. Filter screen; 52. Clamping plate; 52a. Half plate; 521. Drag reduction port; 523. Water filtering port; 522. Fitting groove; 53. Clamping plate head; 54. Limit rod; 541. Limiting part; 55. Connecting ring; 551. Extended ring. Detailed implementation mode

[0025] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the Figure 1 orientation or positional relationship shown, and is only for the convenience of simplifying the description of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0026] In order to make the purpose and advantages of the present invention clearer, the present invention will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementation manners of the present invention, and does not strictly limit the scope of protection specifically claimed by the present invention. As used herein, the terms up and down and left and right do not limit their strict geometric definitions, but include tolerances for machining or human errors that are reasonable and inconsistent. The specific features of this self-filtering magnetic pump will be described in detail below: An embodiment of the present invention: Referring to Figures 1 - 7 , the present invention provides a self-filtering magnetic pump, including a motor 10 and a pump body 20. The pump body 20 is fixed to the end of the motor 10. The impeller in the pump body 20 is fixed to the rotating shaft of the motor 10. A filtering device is fixed to the other end of the pump body 20. The filtering device is communicated with the water inlet of the pump body 20. The filtering device includes a pipe body 40 and three filter screens 51 arranged in the pipe body 40. When the fluid in the pipe body 40 passes through the filter screen 51, the cross-section is the same as that of the filter screen 51. In this embodiment, the density of the three filter screens 51 gradually decreases along the fluid flow direction, so that the impurities in the fluid can be filtered by the three filter screens 51 respectively, avoiding all of them accumulating on one filter screen 51 and affecting the fluid passage.

[0027] Referring to Figure 3 , Figure 4, the pipe body 40 is cylindrical and composed of a first half pipe 40a and a second half pipe 40b. Two connecting flanges 30 are fixedly provided at both ends of the first half pipe 40a. A through port 301 is opened at the center of the connecting flange 30. The diameter of the through port 301 is smaller than the inner diameter of the pipe body 40. A connecting ring 55 is fixed in the through port 301. One end of the connecting ring 55 close to the pipe body 40 extends radially outward to form an extension ring 551. One end face of the extension ring 551 abuts against the connecting flange 30, and a sealing ring 50 abutting against the inner wall of the pipe body 40 is fixedly provided on the other end face. The filter screen 51 is inclined from bottom to top along the water flow direction.

[0028] Referring to Figure 3 , three guide plates 401 are fixedly provided on the inner walls of both the first half pipe 40a and the second half pipe 40b. The guide plates 401 on the first half pipe 40a and the second half pipe 40b are aligned with each other, and a space equal in width to the filter screen 51 is formed between two opposite guide plates 401. The filter screen 51 is arranged between two opposite guide plates 401, and the three form an ellipse, and the projection of the ellipse and the inner wall of the pipe body 40 on the connecting flange 30 coincides.

[0029] Referring to Figures 3 - 5 , three clamping plate seats 42 are fixedly provided on the outer periphery of the pipe body 40. The clamping plate seat 42 is composed of a first half seat 42a and a second half seat 42b. The first half seat 42a is fixed on the outer periphery of the first half pipe 40a, and the second half seat 42b is fixed on the outer periphery of the second half pipe 40b. A guide groove 421 that is recessed along the inclined direction of the clamping plate seat 42 and penetrates through the pipe body 40 and the guide plate 401 is opened on the upper end face of the clamping plate seat 42. A clamping plate 52 is slidably connected in the guide groove 421. The filter screen 51 is fixed in the clamping plate 52.

[0030] Referring to Figure 3 、 Figure 6 , a drag reduction port 521 that is recessed upward is opened at the lower end of the clamping plate 52. When the filter screen 51 is pulled out of the pipe body 40 upward along with the clamping plate 52, the upper side wall of the drag reduction port 521 is aligned with the inner wall of the pipe body 40. The clamping plate 52 is formed by overlapping two half plates 52a. Filter water ports 523 that penetrate through their thickness are opened in both half plates 52a. Fitting grooves 522 that surround the filter water port 523 in a circle are opened on the surfaces of the two half plates 52a close to each other. The filter screen 51 is fitted in the fitting grooves 522.

[0031] Referring to Figure 5 、 Figure 6 , a clamping plate head 53 is sleeved on the upper end of the clamping plate 52. The clamping plate head 53 abuts against the upper end face of the clamping plate seat 42. Two symmetrically arranged limiting blocks 422 are fixedly provided on one side edge of the clamping plate seat 42. A limiting rod 54 is slidably connected between the two limiting blocks 422. A limiting portion 541 is fixedly provided at the lower end of the limiting rod 54. The limiting portion 541 can abut against the lower end face of the limiting block 422. The upper end of the limiting portion 541 is fixed on the clamping plate head 53. The length of the limiting rod 54 is equal to the length of the filter screen 51.

[0032] Refer to Figure 3 , a connecting plate 41 is provided between two adjacent clamping plate seats 42 and between the clamping plate seat 42 and the connecting flange 30. The connecting plate 41 is composed of a first side plate 41a and a second side plate 41b which overlap each other. The first side plate 41a is fixedly arranged on the upper and lower sides of the first half pipe 40a, and the second side plate 41b is fixedly arranged on the upper and lower sides of the second half pipe 40b. The first side plate 41a and the second side plate 41b are fixedly connected by bolts.

[0033] When the present invention is in use, the water pipe is connected to the connecting flange 30 on the other side, and the motor 10 is started to make the impeller in the pump body 20 rotate, then the water pipe pumps the fluid into the pump body 20. During this process, after the fluid passes through the filter screen 51, the impurities in the fluid are intercepted by the filter screen 51, so that the clean fluid enters the pump body 20, avoiding the impurities from being stuck between the inner magnetic rotor and the isolation cover, and ensuring the normal operation of the magnetic pump.

[0034] After using for a period of time, one of the clamping plate heads 53 can be pulled up, so that the clamping plate 52 moves upward, and then the filter screen 51 moves upward to the upper side of the clamping plate seat 42. At this time, the filter screen 51 can be washed to wash off the impurities on it, and then the clamping plate 52 is pressed back to the initial position to ensure its filtering effect.

[0035] Those skilled in the art can clearly understand that various modifications to the above embodiments can be made without departing from the general spirit and concept of the present invention. They all fall within the protection scope of the present invention. The protection scope of the present invention is subject to the claims attached to the present invention.

Claims

1. A self-filtering magnetic pump, comprising a motor (10) and a pump body (20), characterized in that: The pump body (20) is fixed to the end of the motor (10), the impeller in the pump body (20) is fixed to the rotating shaft of the motor (10), and a filtering device is fixed to the other end of the pump body (20), the filtering device is connected to the water inlet of the pump body (20), and the filtering device comprises a pipe body (40) and a plurality of filter screens (51) arranged in the pipe body (40), and the cross section of the fluid in the pipe body (40) is consistent with the filter screen (51) when passing through the filter screen (51).

2. A self-filtering magnetic pump according to claim 1, characterized in that: The tube body (40) is cylindrical and consists of a first half tube (40a) and a second half tube (40b). Two connecting flanges (30) are fixedly provided at both ends of the first half tube (40a). A through opening (301) is provided at the center of the connecting flange (30). The diameter of the through opening (301) is smaller than the inner diameter of the tube body (40). A connecting ring (55) is fixed in the through opening (301). One end of the connecting ring (55) close to the tube body (40) extends radially outward to form an extension ring (551). One end face of the extension ring (551) abuts against the connecting flange (30), and the other end face of the extension ring (551) abuts against the inner wall of the tube body (40).

3. A self-filtering magnetic pump according to claim 1, characterized in that: The filter screen (51) is arranged obliquely from bottom to top along the water flow direction.

4. A self-filtering magnetic pump according to claim 2, characterized in that: A plurality of guide plates (401) are fixedly provided on the inner walls of the first half tube (40a) and the second half tube (40b); the guide plates (401) on the first half tube (40a) and the second half tube (40b) are aligned with each other, and a gap of the same width as the filter screen (51) is formed between the two opposite guide plates (401); the filter screen (51) is arranged between the two opposite guide plates (401), and the three form an ellipse, and the ellipse coincides with the projection of the inner wall of the tube body (40) on the connecting flange (30).

5. A self-filtering magnetic pump according to claim 4, characterized in that: A plurality of clamping plates (42) are fixedly provided on the outer periphery of the tube body (40), and the clamping plates (42) are composed of a first half seat (42a) and a second half seat (42b). The first half seat (42a) is fixed on the outer periphery of the first half tube (40a), and the second half seat (42b) is fixed on the outer periphery of the second half tube (40b). The upper end surface of the clamping plates (42) is provided with a guide groove (421) which is recessed along the inclination direction of the clamping plates (42) and penetrates the tube body (40) and the guide plate (401). A clamping plate (52) is slidably connected in the guide groove (421), and the filter screen (51) is fixed in the clamping plate (52).

6. A self-filtering magnetic pump according to claim 5, characterized in that: The lower end of the clamping plate (52) is provided with a drag reduction opening (521) that is recessed upwards. When the filter screen (51) is pulled upwards out of the tube body (40) along with the clamping plate (52), the upper side wall of the drag reduction opening (521) is aligned with the inner wall of the tube body (40).

7. A self-filtering magnetic pump according to claim 6, characterized in that: The clamping plate (52) is formed by overlapping two half plates (52a), each of the half plates (52a) being provided with a water filter opening (523) penetrating along its thickness, and each of the two half plates (52a) being provided with a fitting groove (522) surrounding the water filter opening (523) on a side close to each other, and the filter screen (51) being fitted in the fitting groove (522).

8. A self-filtering magnetic pump according to claim 7, characterized in that: A clamp head (53) is sleeved on the upper end of the clamp plate (52), and the clamp head (53) abuts against the upper end surface of the clamp seat (42). Two symmetrically arranged limit blocks (422) are fixedly provided on one side of the clamp seat (42), and a limit rod (54) is slidably connected between the two limit blocks (422). A limit portion (541) is fixedly provided on the lower end of the limit rod (54), and the limit portion (541) can abut against the lower end surface of the limit block (422). The upper end of the limit portion (541) is fixed on the clamp head (53), and the length of the limit rod (54) is equal to the length of the filter screen (51).

9. A self-filtering magnetic pump according to claim 1, characterized in that: A connecting plate (41) is provided between two adjacent clamping plate seats (42) and between the clamping plate seats (42) and the connecting flange (30). The connecting plate (41) is composed of a first side plate (41a) and a second side plate (41b) which overlap each other. The first side plate (41a) is fixedly provided on the upper and lower sides of the first half pipe (40a), and the second side plate (41b) is fixedly provided on the upper and lower sides of the second half pipe (40b). The first side plate (41a) and the second side plate (41b) are fixedly connected by bolts.

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