Energy-saving multistage pump with backwashing structure

Abstract

The application discloses an energy-saving multistage pump with backwashing structure, which comprises a multistage pump body and a filter cylinder, an outer filter screen cylinder and an inner filter screen cylinder are arranged on the inner side of the filter cylinder, an outer plate cleaning assembly is arranged on the filter cylinder, the outer plate cleaning assembly comprises a rotating plate, a rotatable cleaning iron wire roller is slidably arranged on the rotating plate, a baffle is arranged on one end of the rotating plate, an adjusting assembly is arranged on the rotating plate, an inner plate cleaning assembly is further arranged on the filter cylinder, the inner plate cleaning assembly comprises a mounting cylinder, a plurality of adjusting plates are rotatably arranged on the inner side of the mounting cylinder, a sliding rod is slidably arranged on the adjusting plate, and an adjustable contact force cleaning plate is arranged on one end of the sliding rod close to the inner filter screen cylinder. Through the cooperation of the outer plate cleaning assembly and the inner plate cleaning assembly, the inner and outer filter screen cylinders can be comprehensively cleaned, the influence of impurity accumulation on water flow is reduced, and the operation efficiency and energy-saving effect of the multistage pump body are improved.

Description

Technical Field

[0001] This invention relates to the field of multistage centrifugal pump technology, and in particular to an energy-saving multistage pump with a backwashing structure. Background Technology

[0002] The core structure of a multistage pump consists of multiple impellers, guide vanes (or diffusers), and a pump casing. Liquid enters the first-stage impeller from the suction end, gains energy, and then flows into the guide vanes, where its kinetic energy is converted into pressure energy. It then flows into the second-stage impeller for further pressurization. Through the series connection of multiple impellers, the liquid pressure accumulates stage by stage, ultimately outputting a high-pressure fluid from the discharge end.

[0003] During operation, multistage pumps typically have a backwash filter installed at their inlet to filter out large particles in the water and prevent them from causing wear on the multistage impellers and guide vanes. At the same time, the reverse rotation of the multistage pump is used to flush the backwash filter.

[0004] Taking vertical multistage pumps as an example, their backwashing structure is mostly set as a single-layer filter screen, and its filtration effect is relatively simple. When particles of a certain size clog the filter screen, particles of other sizes cannot be filtered, resulting in a decrease in water flow rate. At the same time, due to the accumulation process of particles on the filter screen from bottom to top, the accumulation thickness of particles from the bottom to the top of the filter screen is different. During the backwashing cleaning process of the filter screen, the existing cleaning device cannot clean according to the different accumulation thickness. Therefore, in order to solve the above problems, an energy-saving multistage pump with a backwashing structure is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an energy-saving multistage pump with a backwashing structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An energy-saving multistage pump with a backwashing structure includes a multistage pump body and a filter cartridge. A connecting pipe is installed between the multistage pump body and the filter cartridge. An outer filter cylinder and an inner filter cylinder are installed on the inner side of the filter cartridge. An outer plate cleaning assembly is provided on the filter cartridge. The outer plate cleaning assembly includes a rotating plate. The rotating plate is rotatably disposed inside the filter cartridge. A rotatable cleaning wire roller is slidably disposed on the rotating plate. A baffle is installed at one end of the rotating plate located at the cleaning wire roller. The cleaning wire roller is used to clean the inner side of the outer filter cylinder and the outer side of the inner filter cylinder.

[0008] The rotating plate is provided with an adjustment component, which is used to adjust the position of the cleaning wire roller.

[0009] The filter cartridge is further provided with an inner plate cleaning assembly, which comprises a mounting cylinder fixedly connected between the rotating plate and the mounting cylinder, a plurality of adjusting plates rotatably arranged in the mounting cylinder, a sliding rod slidingly arranged on the adjusting plate, a cleaning plate with adjustable contact force arranged on one end of the sliding rod close to the inner filter screen cylinder, and the cleaning plate being used for cleaning the inner filter screen cylinder of different accumulation layers.

[0010] The above technical scheme further comprises:

[0011] The bottom of the multi-stage pump body is respectively provided with a water pump water outlet flange and a water pump water inlet flange, the two sides of the filter cartridge are respectively provided with a filter cartridge water inlet and a filter cartridge water outlet, the bottom of the filter cartridge is provided with a filter cartridge blowdown port, and the connecting pipe flange is connected between the water pump water inlet flange and the filter cartridge water outlet.

[0012] The bottom of the filter cartridge is fixedly connected with a bottom plate, the bottom plate is fixedly provided with an outer groove and an inner groove, the outer groove and the outer filter screen cylinder are clamped with each other, the inner groove and the inner filter screen cylinder are clamped with each other, the inner side of the bottom plate is fixedly connected with a water passing plate, and the mesh size of the outer filter screen cylinder is smaller than that of the inner filter screen cylinder.

[0013] The outer plate cleaning assembly further comprises a wall plate cleaning motor fixedly installed on the top of the filter cartridge, the top of the filter cartridge is fixedly provided with a bearing plate seat, the output end of the wall plate cleaning motor is provided with a driving bevel gear rotatably connected with the bearing plate seat, the driving bevel gear is meshingly connected with a driven bevel gear, the inner side of the driven bevel gear is fixedly provided with a mounting cylinder rotatably connected with the filter cartridge, the outer side of the mounting cylinder is fixedly connected with a rotating plate, and the bottom of the rotating plate is rotatably connected with the water passing plate.

[0014] The baffle is symmetrically provided with two, the outer wall of the outer filter screen cylinder and the baffle are mutually fitted and relatively slide, a plurality of fixed blocks are fixedly connected on the side of the baffle away from the outer filter screen cylinder, a fixed rod is fixedly connected between the plurality of fixed blocks, and two fixed rods are fixedly connected at the end of the rotating plate.

[0015] The top of the filter cartridge is fixedly provided with an outer gear and an inner gear, the rotating plate is provided with a sliding groove, the sliding groove is slidingly provided with a sliding bearing, the sliding bearing is internally provided with a transmission shaft, the top of the transmission shaft is fixedly provided with a contact gear, and the contact gear is meshingly connected with the outer gear or the inner gear.

[0016] The adjusting assembly comprises a shaft sleeve, the shaft sleeve is rotationally connected with a transmission shaft, a rotating mounting seat is symmetrically fixedly connected on the rotating plate, a threaded cylinder is fixedly connected to one end of the rotating mounting seat close to the transmission shaft, a threaded ring is threadedly connected to the inner side of the threaded cylinder, an adjusting rod is rotationally connected to the inner side of the rotating mounting seat, limit grooves are symmetrically formed on the side surface of one end of the adjusting rod extending to the inner side of the threaded cylinder, the threaded ring is clamped in the limit grooves and relatively slides, a moving cylinder is fixedly connected between the threaded ring and the shaft sleeve, and adjusting openings are symmetrically formed on the outer side of the filter cylinder.

[0017] The inner plate cleaning assembly comprises an inner plate cleaning motor mounted on the top of the bearing plate seat, a rotating rod rotationally connected with the mounting cylinder is fixedly connected to the output end of the inner plate cleaning motor, a plurality of adjusting plates are fixedly connected with the rotating rod, the adjusting plates relatively slide with the mounting cylinder, and vortex adjusting grooves are symmetrically formed on the adjusting plates.

[0018] A plurality of sliding cylinders are fixedly connected to the outer side of the mounting cylinder, the sliding cylinders are arranged at equal intervals in a spiral shape, the sliding cylinders are mutually penetrated with the mounting cylinder, a first sliding gasket is fixedly connected to one end of the sliding rod extending to the inner side of the sliding cylinder, and the first sliding gasket relatively slides with the sliding cylinder.

[0019] A spring is fixedly connected to one end of the first sliding gasket away from the sliding rod, a second sliding gasket is fixedly connected between the spring and the cleaning plate, the second sliding gasket relatively slides with the sliding cylinder, the cleaning plate relatively slides with the sliding cylinder, and a plurality of the cleaning plates are in contact with the inner wall of the inner filter screen cylinder.

[0020] The present application has the following advantages:

[0021] 1、In the present application, the outer filter screen cylinder and the inner filter screen cylinder form a double filter barrier, which can intercept impurities such as particles, fibers and suspended solids of different particle sizes, avoid impurities entering the inside of the multistage pump body, reduce the risk of impeller wear, guide vane blockage and seal failure, and prolong the service life of the equipment.

[0022] 2、In the present application, the cleaning wire roller rotates and moves in a circle, the cleaning wire roller can scrape the attachments on the inner side of the outer filter screen cylinder and the outer side of the inner filter screen cylinder, and the baffle cooperates with the cleaning wire roller to prevent large particles from bouncing out of the outer side of the outer filter screen cylinder.

[0023] 3、In the present application, the cleaning plate can adjust the contact force for different accumulation layers of the inner filter screen cylinder, such as the near-surface loose layer and the deep hard layer, to realize layered cleaning and improve cleaning efficiency, the spring controls the pressure of the cleaning plate, the cleaning plate can adapt to different viscosity or hardness of dirt, and damage to the filter screen material is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 This is a top view schematic diagram of the overall structure of an energy-saving multistage pump with a backwashing structure proposed in this invention;

[0025] Figure 2 This is a schematic diagram of the overall bottom view structure in this invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of the filter cartridge in this invention;

[0027] Figure 4 This is a schematic diagram of the internal structure of the outer and inner filter cylinders in this invention.

[0028] Figure 5 This is a schematic diagram of the adjustment component structure in this invention;

[0029] Figure 6 This is a schematic diagram of the inner plate cleaning assembly structure in this invention;

[0030] Figure 7 This is a schematic diagram of the internal structure of the mounting cylinder in this invention;

[0031] Figure 8 for Figure 4 Enlarged schematic diagram of the structure at point A in the middle;

[0032] Figure 9 for Figure 4 Enlarged schematic diagram of the structure at point B;

[0033] Figure 10 for Figure 5 Enlarged schematic diagram of the structure at point C.

[0034] In the diagram: 1. Multistage pump body; 2. Connecting pipe; 3. Filter cartridge; 4. Wall panel cleaning motor; 5. Inner panel cleaning motor; 6. Shaft sleeve; 10. Pump outlet flange; 11. Pump inlet flange; 30. Filter cartridge inlet; 31. Filter cartridge drain outlet; 32. Filter cartridge outlet; 33. Outer filter screen; 34. Outer groove; 35. Inner groove; 36. Inner filter screen; 37. Water passage plate; 38. Base plate; 39. Adjustment port; 40. Driving bevel gear; 41. Driven bevel gear; 42. Baffle; 420. Fixing block; 43. Fixing rod; 44. Cleaning... 45. Wire roller; 46. Rotating plate; 47. Sliding groove; 48. Internal gear; 49. External gear; 40. Contact gear; 41. Drive shaft; 42. Sliding bearing; 53. Mounting cylinder; 54. Sliding cylinder; 55. Cleaning plate; 66. Rotating rod; 57. Adjusting plate; 58. Vortex adjusting groove; 59. Spring; 60. First sliding washer; 61. Second sliding washer; 62. Adjusting rod; 63. Rotating mounting base; 64. Threaded ring; 65. Threaded cylinder; 66. Limiting groove; 67. Moving cylinder; 48. Bearing plate seat. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example

[0037] like Figures 1-10 As shown, the present invention proposes an energy-saving multistage pump with a backwashing structure, including a multistage pump body 1 and a filter cylinder 3. A connecting pipe 2 is installed between the multistage pump body 1 and the filter cylinder 3. An outer filter cylinder 33 and an inner filter cylinder 36 are installed on the inner side of the filter cylinder 3. An outer plate cleaning assembly is provided on the filter cylinder 3. The outer plate cleaning assembly includes a rotating plate 45, which is rotatably disposed inside the filter cylinder 3. A rotatable cleaning wire roller 44 is slidably disposed on the rotating plate 45. A baffle 42 is installed at one end of the rotating plate 45 located at the cleaning wire roller 44. The cleaning wire roller 44 is used to clean the inner side of the outer filter cylinder 33 and the outer side of the inner filter cylinder 36.

[0038] An adjustment component is provided on the rotating plate 45, which is used to adjust the position of the cleaning wire roller 44;

[0039] The filter cylinder 3 is also equipped with an inner plate cleaning assembly, which includes an installation cylinder 50. The installation cylinder 50 is fixedly connected to the rotating plate 45. Multiple adjusting plates 54 are rotatably arranged inside the installation cylinder 50. A sliding rod 56 is slidably arranged on the adjusting plate 54. A cleaning plate 52 with adjustable contact force is arranged at one end of the sliding rod 56 near the inner filter cylinder 36. The cleaning plate 52 is used to clean the inner filter cylinder 36 with different accumulation layers.

[0040] Furthermore, during the operation of the multistage pump body 1, water flows into the multistage pump body 1 through the filter cylinder 3. The water flows through the inner filter cylinder 36 and the outer filter cylinder 33 in sequence for filtration to remove impurities in the water and reduce the wear of large particles on the impeller and guide vanes of the multistage pump body 1. After filtration for a period of time, impurities will accumulate on the inner side of the outer filter cylinder 33 and the outer side of the inner filter cylinder 36. At this time, the outer plate cleaning assembly and the inner plate cleaning assembly start to work. For the outer plate cleaning assembly, the rotating plate 45 rotates inside the filter cylinder 3, and the cleaning wire roller 44 can rotate on its own axis while following the circumferential movement of the rotating plate 45. Its position is adjustable. The cleaning wire roller 44 is used to clean the inner side of the outer filter cylinder 33 and the outer side of the inner filter cylinder 36, scraping off the impurities attached to these two filter cylinders.

[0041] Further, due to the synchronous rotation between the mounting cylinder 50 and the rotating plate 45, the position of the sliding rod 56 on the adjusting plate 54 is adjusted by adjusting the rotation angle of the adjusting plate 54, so as to adjust the contact force between the cleaning plate 52 and the inner filter screen cylinder 36, thereby effectively cleaning the impurities accumulated on different layers of the inner filter screen cylinder 36. Through the cooperation of the outer plate cleaning assembly and the inner plate cleaning assembly, the overall cleaning of the filter screen cylinder is realized, the influence of impurity accumulation on water flow is reduced, and the operation efficiency and energy saving effect of the multi-stage pump are improved.

[0042] As shown in Figures 1-4 The bottom of the multi-stage pump body 1 is provided with a water pump outlet flange 10 and a water pump inlet flange 11 on both sides, and the filter cylinder 3 is provided with a filter cylinder water inlet 30 and a filter cylinder water outlet 32 on both sides. The bottom of the filter cylinder 3 is provided with a filter cylinder blowdown port 31, and the connecting pipe 2 is flange-connected between the water pump inlet flange 11 and the filter cylinder water outlet 32.

[0043] The bottom of the filter cylinder 3 is fixedly connected with a bottom plate 38, and the bottom plate 38 is fixedly provided with an outer connecting groove 34 and an inner connecting groove 35. The outer connecting groove 34 is clamped with the outer filter screen cylinder 33, and the inner connecting groove 35 is clamped with the inner filter screen cylinder 36. The inner side of the bottom plate 38 is fixedly connected with a water passing plate 37, and the mesh size of the outer filter screen cylinder 33 is smaller than that of the inner filter screen cylinder 36.

[0044] Further, the water first enters through the filter cylinder water inlet 30 on the side of the filter cylinder 3, and an electromagnetic valve is installed on the filter cylinder water inlet 30. The water passing plate 37 at the center of the inner side of the bottom plate 38 guides the water to pass through, and then passes through the inner filter screen cylinder 36 and the outer filter screen cylinder 33 in sequence. Since the mesh size of the outer filter screen cylinder 33 is smaller than that of the inner filter screen cylinder 36, graded filtration can be achieved, and impurities of different particle sizes in the water can be effectively removed. The filtered water flows out from the filter cylinder water outlet 32, enters the multi-stage pump body 1 through the connecting pipe 2, and realizes the functions of water inlet and outlet through the water pump outlet flange 10 and the water pump inlet flange 11 on both sides of the bottom of the multi-stage pump body 1. In the filter cylinder 3, the filter cylinder blowdown port 31 provided at the bottom of the filter cylinder 3 is used to discharge the accumulated impurities during filtration. The bottom plate 38 on the inner wall of the bottom of the filter cylinder 3 plays a supporting role, and the outer connecting groove 34 and the inner connecting groove 35 fixed thereon are clamped with the outer filter screen cylinder 33 and the inner filter screen cylinder 36 respectively, so as to realize stable installation of the filter screen cylinder. Electromagnetic valves are installed on the filter cylinder blowdown port 31, the connecting pipe 2 and the filter cylinder water inlet 30.

[0045] Further, in the backwashing cleaning process, the multi-stage pump body 1 needs to be reversed to operate, the water flow is reversed, and at this time the electromagnetic valve on the filter cartridge water inlet 30 needs to be closed, the electromagnetic valve at the filter cartridge blowdown port 31 is opened, and the valve of the connecting pipe 2 remains open. In the normal operation process, the multi-stage pump body 1 is forward, the water flow is forward, the other electromagnetic valves are opened, and the electromagnetic valve at the filter cartridge blowdown port 31 is closed.

[0046] As shown in Figure 4 , Figure 8 and Figure 9 , the outer plate cleaning assembly further comprises a wall plate cleaning motor 4 fixedly installed at the top of the filter cartridge 3. The top of the filter cartridge 3 is fixedly installed with a bearing plate seat 4005. The output end of the wall plate cleaning motor 4 is installed with a driving bevel gear 40 rotatably connected with the bearing plate seat 4005. The driving bevel gear 40 is meshingly connected with a driven bevel gear 41. The inner side of the driven bevel gear 41 is fixedly installed with a mounting cylinder 50 rotatably connected with the filter cartridge 3. The outer side of the mounting cylinder 50 is fixedly connected with a rotating plate 45. The bottom of the rotating plate 45 is rotatably connected with the water passing plate 37.

[0047] The baffle 42 is symmetrically arranged in two. The outer filter screen cylinder 33 and the outer wall of the baffle 42 are mutually attached and relatively slide. The side of the baffle 42 away from the outer filter screen cylinder 33 is fixedly connected with a plurality of fixing blocks 420. The plurality of fixing blocks 420 are jointly fixedly connected with a fixing rod 43. The two fixing rods 43 are fixedly connected at the end portions of the rotating plate 45.

[0048] The top inner side of the filter cartridge 3 is fixedly installed with an outer gear 47 and an inner gear 46. The rotating plate 45 is provided with a sliding groove 450. The sliding groove 450 is slidably provided with a sliding bearing 480. The sliding bearing 480 is internally installed with a transmission shaft 48. The top of the transmission shaft 48 is fixedly connected with a contact gear 470. The contact gear 470 is meshingly engaged with the outer gear 47 or the inner gear 46.

[0049] Further, after a period of filtration, impurities will accumulate on the inner side of the outer filter screen cylinder 33 and the outer side of the inner filter screen cylinder 36. At this time, there is a pressure difference between the inner side of the inner filter screen cylinder 36 and the outer side of the outer filter screen cylinder 33. Through the sensor on the filter cartridge 3, when the pressure difference reaches a certain value, the outer plate cleaning assembly and the inner plate cleaning assembly start to work.

[0050] Further, in the outer plate cleaning assembly, the wall plate cleaning motor 4 is started. The output end of the wall plate cleaning motor 4 drives the driving bevel gear 40 to rotate. The driving bevel gear 40 is meshingly engaged with the driven bevel gear 41, thereby driving the mounting cylinder 50 fixedly installed at the inner side of the driven bevel gear 41 to rotate. The rotating plate 45 fixedly connected at the outer side of the mounting cylinder 50 rotates accordingly. The bottom of the rotating plate 45 is rotatably connected with the water passing plate 37 to ensure the stability of rotation.

[0051] Further, the rotating plate 45 is slidably provided with a rotatable cleaning wire roller 44, the two ends of the rotating plate 45 are symmetrically provided with baffles 42 which are in close contact with the outer wall of the outer filter screen cylinder 33 and slide relative to each other, the baffles 42 are fixed on the end of the rotating plate 45 through the fixed block 420 and the fixed rod 43, the baffles 42 are located on the same horizontal line as the cleaning wire roller 44, when the cleaning wire roller 44 cleans the inside of the outer filter screen cylinder 33, the baffles 42 can block the position of the cleaning part of the outer filter screen cylinder 33 at this time, which can prevent impurities from splashing outside the outer filter screen cylinder 33 during cleaning;

[0052] Further, the sliding groove 450 formed in the rotating plate 45 is slidably provided with a sliding bearing 480, the top of the transmission shaft 48 in the sliding bearing 480 is fixedly connected with a contact gear 470, the outer gear 47 and the inner gear 46 fixedly arranged on the top inside of the filter cylinder 3 are in meshing with the contact gear 470, when the rotating plate 45 rotates, the position of the cleaning wire roller 44 can be adjusted, the contact gear 470 will drive the transmission shaft 48 to rotate during meshing with the outer gear 47 or the inner gear 46, and then drive the cleaning wire roller 44 to rotate, the cleaning wire roller 44 makes a circular motion around the center of the filter cylinder 3 under the driving of the rotating plate 45, and rotates itself, and the impurities inside the outer filter screen cylinder 33 and outside the inner filter screen cylinder 36 are cleaned.

[0053] As shown in Figure 10 The adjusting assembly includes a shaft sleeve 6 which is rotatably connected between the transmission shaft 48 and the rotating plate 45, the rotating plate 45 is symmetrically fixedly connected with a rotating mounting seat 61, one end of the rotating mounting seat 61 close to the transmission shaft 48 is fixedly connected with a threaded cylinder 63, the inside of the threaded cylinder 63 is threadedly connected with a threaded ring 62, the inside of the rotating mounting seat 61 is rotatably connected with an adjusting rod 60, one end of the adjusting rod 60 extending to the inside of the threaded cylinder 63 is symmetrically provided with a limiting groove 64 on the side surface, the threaded ring 62 is clamped in the inside of the limiting groove 64 and slides relative to each other, the threaded ring 62 and the shaft sleeve 6 are fixedly connected with a moving cylinder 65, the outside of the filter cylinder 3 is symmetrically provided with an adjusting port 39;

[0054] Furthermore, the adjustment assembly is used to adjust the position of the cleaning wire roller 44. The bushing 6 is rotatably connected to the drive shaft 48. The rotating mounting base 61 is symmetrically fixed on the rotating plate 45. The threaded cylinder 63 near the drive shaft 48 of the rotating mounting base 61 is internally threaded to the threaded ring 62. The adjusting rod 60 extends to the limiting groove 64 on the inner side of the threaded cylinder 63 and engages with the threaded ring 62 and slides relative to it. The moving cylinder 65 is fixedly connected between the threaded ring 62 and the bushing 6. Through the symmetrical adjustment ports 39 on the outside of the filter cylinder 3, the end of the adjusting rod 60 near the adjustment port 39 is provided with an internal hexagonal slot. By rotating the adjusting rod 60 with a tool, the threaded ring 62 can move inside the threaded cylinder 63, driving the moving cylinder 65 and the bushing 6 to move, thereby adjusting the position of the drive shaft 48 and the cleaning wire roller 44 until the internal gear 46 and the contact gear 470 mesh with each other, so as to clean the impurities inside the outer filter cylinder 33 and outside the inner filter cylinder 36, in order to adapt to different impurity accumulation conditions.

[0055] Furthermore, after a period of use, the wires on the cleaning wire roller 44 will undergo irreversible bending. The bending of the wires in one direction will cause the contact between the cleaning wire roller 44 and the outer filter cylinder 33 and the inner filter cylinder 36 to be loose. Therefore, when the contact gear 470 meshes with the outer gear 47 or the inner gear 46, it will drive the transmission shaft 48 to rotate. At this time, the rotation direction of the transmission shaft 48 is opposite. Therefore, the bending of the wires on the cleaning wire roller 44 can be slowed down by using the different rotation directions of the cleaning wire roller 44.

[0056] like Figure 5 - Figure 7 As shown, the inner plate cleaning assembly includes an inner plate cleaning motor 5 installed on the top of the bearing plate seat 4005. The output end of the inner plate cleaning motor 5 is fixedly connected to a rotating rod 53 that is rotatably connected to the mounting cylinder 50. Multiple adjusting plates 54 are fixedly connected to the rotating rod 53. The adjusting plates 54 slide relative to the mounting cylinder 50. The adjusting plates 54 are symmetrically provided with vortex-shaped adjusting grooves 55. The vortex-shaped adjusting grooves 55 slide relative to the sliding rod 56.

[0057] Multiple sliding cylinders 51 are fixedly connected to the outside of the mounting cylinder 50. The sliding cylinders 51 are arranged in a spiral and are equally spaced. The sliding cylinders 51 and the mounting cylinder 50 are interconnected. A first sliding pad 58 is fixedly connected to one end of the sliding rod 56 extending to the inside of the sliding cylinder 51. The first sliding pad 58 slides relative to the sliding cylinder 51.

[0058] A spring 57 is fixedly connected to the end of the first sliding pad 58 away from the sliding rod 56. A second sliding pad 59 is fixedly connected between the spring 57 and the cleaning plate 52. The second sliding pad 59 slides relative to the slide cylinder 51. The cleaning plate 52 slides relative to the slide cylinder 51. Multiple cleaning plates 52 are in contact with the inner wall of the inner filter cylinder 36.

[0059] Further, for the inner filter screen cylinder 36 inside cleaning, the inner plate cleaning motor 5 is started, the contact force of the cleaning plate 52 and the inner wall of the inner filter screen cylinder 36 is adjusted, the output end drives the rotating rod 53 to rotate, a plurality of adjusting plates 54 are fixedly connected with the rotating rod 53, so that the adjusting plate 54 rotates with the rotating rod 53, and the adjusting plate 54 slides relative to the mounting cylinder 50. The vortex adjusting groove 55 symmetrically opened on the adjusting plate 54 slides relative to the sliding rod 56, when the adjusting plate 54 rotates, the sliding rod 56 slides on the adjusting plate 54 under the action of the vortex adjusting groove 55, and the vortex adjusting groove 55 is spirally arranged to the center of the adjusting plate 54, so that the sliding rod 56 moves to the inside or outside of the mounting cylinder 50;

[0060] Further, the position of the sliding rod 56 from bottom to top is gradually close to the center of the adjusting plate 54, so that the contact force of the adjusting cleaning plate 52 and the inner wall of the inner filter screen cylinder 36 is gradually reduced from bottom to top, and the movement trend of all the sliding rods 56 is consistent (moving to the inside or outside of the mounting cylinder 50), so that the contact force of a plurality of adjusting cleaning plates 52 and the inner wall of the inner filter screen cylinder 36 can be adjusted at the same time.

[0061] Further, the mounting cylinder 50 is driven by the wall plate cleaning motor 4 to rotate synchronously with the rotating plate 45, when the sliding rod 56 slides, the first sliding gasket 58 slides in the sliding cylinder 51, and the spring 57 is compressed or stretched, so as to adjust the contact force of the cleaning plate 52 and the inner wall of the inner filter screen cylinder 36. A plurality of cleaning plates 52 are in contact with the inner wall of the inner filter screen cylinder 36, and the inner filter screen cylinder 36 with different accumulation layers can be cleaned.

[0062] In the embodiment, through the cooperation of the outer plate cleaning assembly and the inner plate cleaning assembly, the inner and outer filter screen cylinders are comprehensively cleaned, the influence of impurity accumulation on water flow is reduced, the operation efficiency and energy saving effect of the multi-stage pump main body 1 are improved, and at the same time, the cleaning method does not need to be frequently disassembled for manual cleaning, so that the maintenance cost and working strength are reduced.

[0063] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An energy-saving multistage pump with a backwashing structure, comprising a multistage pump body (1) and a filter cartridge (3), wherein a connecting pipe (2) is installed between the multistage pump body (1) and the filter cartridge (3), characterized in that, The filter cylinder (3) is equipped with an outer filter cylinder (33) and an inner filter cylinder (36) on its inner side. The filter cylinder (3) is provided with an outer plate cleaning assembly, which includes a rotating plate (45). The rotating plate (45) is rotatably disposed inside the filter cylinder (3). A rotatable cleaning wire roller (44) is slidably disposed on the rotating plate (45). A baffle (42) is installed at one end of the rotating plate (45) located on the cleaning wire roller (44). The cleaning wire roller (44) is used to clean the inner side of the outer filter cylinder (33) and the outer side of the inner filter cylinder (36). An adjustment component is provided on the rotating plate (45), which is used to adjust the position of the cleaning wire roller (44); The filter cylinder (3) is also provided with an inner plate cleaning assembly. The inner plate cleaning assembly includes an installation cylinder (50), which is fixedly connected to a rotating plate (45). Multiple adjusting plates (54) are rotatably arranged inside the installation cylinder (50). A sliding rod (56) is slidably arranged on the adjusting plate (54). An adjustable contact force cleaning plate (52) is provided at one end of the sliding rod (56) near the inner filter cylinder (36). The cleaning plate (52) is used to clean the inner filter cylinder (36) with different accumulation layers. The adjustment assembly includes a bushing (6), which is rotatably connected to the drive shaft (48). A rotating mounting seat (61) is symmetrically fixedly connected to the rotating plate (45). A threaded cylinder (63) is fixedly connected to one end of the rotating mounting seat (61) near the drive shaft (48). A threaded ring (62) is threadedly connected to the inner side of the threaded cylinder (63). An adjustment rod (60) is rotatably connected to the inner side of the rotating mounting seat (61). A limiting groove (64) is symmetrically opened on one side of the adjusting rod (60) extending to the inner side of the threaded cylinder (63). The threaded ring (62) is engaged in the inner side of the limiting groove (64) and slides relative to it. A movable cylinder (65) is fixedly connected between the threaded ring (62) and the bushing (6). An adjustment port (39) is symmetrically opened on the outer side of the filter cylinder (3). The inner plate cleaning assembly includes an inner plate cleaning motor (5) installed on the top of the bearing plate seat (4005). The output end of the inner plate cleaning motor (5) is fixedly connected to a rotating rod (53) that is rotatably connected to the mounting cylinder (50). Multiple adjusting plates (54) are fixedly connected to the rotating rod (53). The adjusting plates (54) slide relative to the mounting cylinder (50). The adjusting plates (54) are symmetrically provided with vortex-shaped adjusting grooves (55). The vortex-shaped adjusting grooves (55) slide relative to the sliding rod (56).

2. The energy-saving multi-stage pump with a backwashing structure according to claim 1, characterized in that, The bottom sides of the multi-stage pump body (1) are respectively equipped with a water pump outlet flange (10) and a water pump inlet flange (11). The filter cylinder (3) is respectively equipped with a filter cylinder inlet (30) and a filter cylinder outlet (32) on both sides. The bottom of the filter cylinder (3) is equipped with a filter cylinder drain outlet (31). The connecting pipe (2) is flanged between the water pump inlet flange (11) and the filter cylinder outlet (32).

3. The energy-saving multi-stage pump with a backwashing structure according to claim 2, characterized in that, A base plate (38) is fixedly connected to the bottom inner wall of the filter cylinder (3). An outer groove (34) and an inner groove (35) are fixedly installed on the base plate (38). The outer groove (34) is engaged with the outer filter cylinder (33), and the inner groove (35) is engaged with the inner filter cylinder (36). A water-passing plate (37) is fixedly connected to the center of the inner side of the base plate (38). The mesh size of the outer filter cylinder (33) is smaller than that of the inner filter cylinder (36).

4. The energy-saving multi-stage pump with a backwashing structure according to claim 1, characterized in that, The outer panel cleaning assembly also includes a wall panel cleaning motor (4) fixedly installed on the top of the filter cylinder (3). A bearing plate seat (4005) is fixedly installed on the top of the filter cylinder (3). An active bevel gear (40) rotatably connected to the bearing plate seat (4005) is installed at the output end of the wall panel cleaning motor (4). A driven bevel gear (41) meshes with the active bevel gear (40). An installation cylinder (50) rotatably connected to the filter cylinder (3) is fixedly installed on the inner side of the driven bevel gear (41). A rotating plate (45) is fixedly connected to the outer side of the installation cylinder (50). The bottom of the rotating plate (45) is rotatably connected to the water flow plate (37).

5. An energy-saving multistage pump with a backwashing structure according to claim 4, characterized in that, The baffles (42) are two symmetrically arranged. The outer filter cylinder (33) and the outer wall of the baffle (42) are in contact with each other and slide relative to each other. Multiple fixing blocks (420) are fixedly connected to the side of the baffle (42) away from the outer filter cylinder (33). The multiple fixing blocks (420) are fixedly connected together by fixing rods (43). Two fixing rods (43) are fixedly connected to the end of the rotating plate (45).

6. An energy-saving multistage pump with a backwashing structure according to claim 5, characterized in that, An external gear (47) and an internal gear (46) are fixedly installed on the inner side of the top of the filter cylinder (3). A sliding groove (450) is provided on the rotating plate (45). A sliding bearing (480) is slidably arranged inside the sliding groove (450). A drive shaft (48) is installed inside the sliding bearing (480). A contact gear (470) is fixedly connected to the top of the drive shaft (48). The contact gear (470) meshes with the external gear (47) or the internal gear (46).

7. The energy-saving multistage pump with a backwashing structure according to claim 1, characterized in that, Multiple sliding cylinders (51) are fixedly connected to the outside of the mounting cylinder (50). The sliding cylinders (51) are arranged in a spiral and are equidistant. The sliding cylinders (51) and the mounting cylinder (50) are interconnected. A first sliding pad (58) is fixedly connected to one end of the sliding rod (56) extending to the inside of the sliding cylinder (51). The first sliding pad (58) slides relative to the sliding cylinder (51).

8. An energy-saving multistage pump with a backwashing structure according to claim 7, characterized in that, A spring (57) is fixedly connected to the end of the first sliding pad (58) away from the sliding rod (56). A second sliding pad (59) is fixedly connected between the spring (57) and the cleaning plate (52). The second sliding pad (59) slides relative to the slide cylinder (51). The cleaning plate (52) slides relative to the slide cylinder (51). The plurality of cleaning plates (52) are in contact with the inner wall of the inner filter cylinder (36).

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