Liquid feeding centrifugal pump

Abstract

The utility model discloses a liquid feeding centrifugal pump which comprises a pump body, a motor body is arranged at the lower end of the pump body, a centrifugal chamber body is installed in the pump body, a water outlet pipe opening is formed in the outer side of the centrifugal chamber body, and an impurity filtering box is arranged at the bottom of the inner side of the pump body. The impurity filtering box comprises a stainless steel positioning plate and a stainless steel fine filtering net, the stainless steel positioning plate is detachably connected with the pump body, and a plurality of centrifugal chamber water inlet holes are formed in the stainless steel positioning plate. According to the liquid feeding centrifugal pump, after water passes through the stainless steel coarse filter screen, the middle filter layer and the stainless steel fine filter screen to be filtered, various impurities in the water can be effectively removed through the impurity filter box, so that when the motor body drives the impeller blades to rotate through the motor shaft, the impeller blades cannot be damaged by collision of the impurities, and the service life of the impeller blades is prolonged. Therefore, the impeller assembly is not easy to damage, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a liquid feeding centrifugal pump. Background Art

[0002] A centrifugal pump is a pumping machine that uses the centrifugal motion of water. Before starting the centrifugal pump, fill the pump with water. After starting, the rotating impeller drives the water in the pump to rotate at high speed. The water performs centrifugal motion, is thrown outward, and is pressed into the outlet pipe. After the water is thrown out, the pressure near the impeller decreases, and a low-pressure area is formed near the shaft. The pressure here is much lower than the atmospheric pressure. Under the action of atmospheric pressure, the water outside opens the bottom valve and enters the pump from the water inlet pipe. The water that rushes in is thrown out again as the impeller rotates at high speed and is pressed into the outlet pipe. Driven by the power machine, the impeller continues to rotate at high speed, and water is continuously pumped from a low place to a high place.

[0003] The impeller is one of the most important parts in the working process. If the impeller is damaged or shakes greatly, the operation of the entire centrifugal pump will be unstable. Moreover, the water contains impurities, and the impeller is easily damaged after long-term operation. However, the existing centrifugal pump structure is unreasonable, the impeller is not easy to replace, which affects the service life of the pump and has poor practicality. Utility Model Content

[0004] The main purpose of the utility model is to provide a liquid feeding centrifugal pump, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A liquid feeding centrifugal pump comprises a pump body, a motor body is arranged at the lower end of the pump body, a centrifugal chamber body is installed in the pump body, a water outlet is installed on the outside of the centrifugal chamber body, an impurity filter box is arranged at the inner bottom of the pump body, the impurity filter box comprises a stainless steel positioning plate and a stainless steel fine filter screen, the stainless steel positioning plate is detachably connected to the pump body, and a plurality of centrifugal chamber water inlet holes are arranged on the stainless steel positioning plate, the stainless steel fine filter screen is a rectangular parallelepiped structure, and the stainless steel fine filter screen is welded and fixed to the stainless steel positioning plate, an intermediate filter layer is sleeved on the outer surface of the stainless steel fine filter screen, and the main body material of the intermediate filter layer is flexible Material, a stainless steel coarse filter screen is sleeved on the outer surface of the intermediate filter layer, a bearing is fixedly connected to the inner middle part of the stainless steel positioning plate, the motor body comprises a motor bracket and a motor shaft, the motor shaft passes through the interior of the centrifugal chamber body, the motor shaft and the centrifugal chamber body are movably connected, the upper end of the motor shaft is connected with a threaded connection part, the threaded connection part is threadedly connected with an impeller assembly, the impeller assembly comprises a threaded tube, a positioning shaft and an impeller blade, the inner side of the threaded tube is threadedly connected to the threaded connection part, the upper end of the threaded tube is welded and fixed to the impeller blade, the threaded tube is welded and fixed to the positioning shaft, and the lower end of the positioning shaft is inserted into the inner side of the bearing.

[0007] Preferably, a plurality of groups of bolts are provided between the stainless steel fine filter screen, the intermediate filter layer and the stainless steel coarse filter screen, and the stainless steel fine filter screen, the intermediate filter layer and the stainless steel coarse filter screen are assembled by bolts.

[0008] Preferably, the wall thickness of the stainless steel fine filter is 1.5 mm, the wall thickness of the impurity filter box is 1-5 mm, and the wall thickness of the stainless steel coarse filter is 1-3 mm.

[0009] Preferably, the flexible material of the intermediate filter layer is an activated carbon filter, a sponge filter layer or a gauze filter layer.

[0010] Preferably, at least one screw hole is provided on the outer surface of the threaded tube, and a limit screw is threadedly connected in each screw hole, so that the threaded tube is locked by the limit screw.

[0011] Preferably, the motor shaft, threaded tube, positioning shaft and impeller blades are all made of stainless steel.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The impurity filter box is equipped with a stainless steel coarse filter, an intermediate filter layer and a stainless steel fine filter from the outside to the inside. The water will come into contact with the impeller assembly only after three filtrations. After the water passes through the stainless steel coarse filter, the intermediate filter layer and the stainless steel fine filter, the impurity filter box can effectively remove various impurities in the water, so that the motor body will not be damaged by impurities when the impeller blades are driven to rotate by the motor shaft, making the impeller assembly less likely to be damaged, thereby extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a liquid feeding centrifugal pump of the utility model;

[0015] Figure 2 This is a schematic diagram of the partial explosion structure of a liquid feeding centrifugal pump of the utility model;

[0016] Figure 3 The utility model is a partial structural schematic diagram of a liquid feeding centrifugal pump.

[0017] In the figure: 1. pump body; 11. centrifugal chamber body; 111. water outlet; 2. motor body; 21. motor bracket; 22. motor shaft; 221. threaded connection; 3. impurity filter box; 31. stainless steel positioning plate; 311. centrifugal chamber water inlet hole; 32. stainless steel fine filter; 33. intermediate filter layer; 34. stainless steel coarse filter; 4. bearing; 5. impeller assembly; 51. threaded pipe; 52. positioning shaft; 53. impeller blade. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] like Figure 1-3As shown, a liquid feeding centrifugal pump comprises a pump body 1, a motor body 2 is arranged at the lower end of the pump body 1, a centrifugal chamber body 11 is installed in the pump body 1, a water outlet pipe 111 is installed outside the centrifugal chamber body 11, an impurity filter box 3 is arranged at the inner bottom of the pump body 1, the impurity filter box 3 comprises a stainless steel positioning plate 31 and a stainless steel fine filter 32, the stainless steel positioning plate 31 is detachably connected to the pump body 1, and a plurality of centrifugal chamber water inlet holes 311 are opened on the stainless steel positioning plate 31, the stainless steel fine filter 32 is a rectangular parallelepiped structure, and the stainless steel fine filter 32 is welded and fixed to the stainless steel positioning plate 31, an intermediate filter layer 33 is sleeved on the outer surface of the stainless steel fine filter 32, and the main body material of the intermediate filter layer 33 is a flexible material, and the intermediate filter layer 33 is made of a plurality of stainless steel positioning plates. A stainless steel coarse filter screen 34 is sleeved on the outer surface of the intermediate filter layer 33, a bearing 4 is fixedly connected to the inner middle part of the stainless steel positioning plate 31, the motor body 2 includes a motor bracket 21 and a motor shaft 22, the motor shaft 22 passes through the inside of the centrifugal chamber body 11, the motor shaft 22 is movably connected to the centrifugal chamber body 11, the upper end of the motor shaft 22 is connected to a threaded connection part 221, and an impeller assembly 5 is threadedly connected to the threaded connection part 221. The impeller assembly 5 includes a threaded tube 51, a positioning shaft 52 and an impeller blade 53. The inner side of the threaded tube 51 is threadedly connected to the threaded connection part 221, the upper end of the threaded tube 51 is welded and fixed to the impeller blade 53, the threaded tube 51 is welded and fixed to the positioning shaft 52, and the lower end of the positioning shaft 52 is inserted into the inner side of the bearing 4.

[0020] In this embodiment, a plurality of groups of bolts are arranged between the stainless steel fine filter 32, the intermediate filter layer 33 and the stainless steel coarse filter 34, and the stainless steel fine filter 32, the intermediate filter layer 33 and the stainless steel coarse filter 34 are assembled by bolts. The wall thickness of the stainless steel fine filter 32 is 1.5 mm, the wall thickness of the impurity filter box 3 is 1-5 mm, the wall thickness of the stainless steel coarse filter 34 is 1-3 mm, the flexible material of the intermediate filter layer 33 is an activated carbon filter, a sponge filter layer or a gauze filter layer, and at least one screw hole is arranged on the outer surface of the threaded tube 51, and a limit screw is threadedly connected in each screw hole, and the threaded tube 51 is locked by the limit screw.

[0021] Specifically, the impeller assembly 5 is easy to assemble and disassemble, has reliable connection, simple replacement and convenient maintenance; the impurity filter box 3 is provided with a stainless steel coarse filter 34, an intermediate filter layer 33 and a stainless steel fine filter 32 from the outside to the inside, so that the impurity filter box 3 can effectively remove various impurities in the water, so that when the motor body 2 drives the impeller blades 53 to rotate through the motor shaft 22, it will not be damaged by impurities, so that the impeller assembly 5 is not easy to be damaged, thereby extending the service life. In addition, a positioning shaft 52 and a bearing 4 are provided under the impeller assembly 5, so that the impeller assembly 5 has little shaking when rotating and works stably, thereby extending the service life of the centrifugal pump.

[0022] In this embodiment, the motor shaft 22, the threaded tube 51, the positioning shaft 52, and the impeller blades 53 are all made of stainless steel.

[0023] Specifically, the motor shaft 22, the threaded tube 51, the positioning shaft 52, and the impeller blades 53 are all made of stainless steel, thereby extending the service life of the centrifugal pump.

[0024] Working principle:

[0025] The impeller assembly 5 is easy to assemble and disassemble, has reliable connection, simple replacement and convenient maintenance; the impurity filter box 3 is provided with a stainless steel coarse filter 34, an intermediate filter layer 33 and a stainless steel fine filter 32 from the outside to the inside, and the water will contact the impeller assembly 5 after being filtered three times. After the water is filtered by the stainless steel coarse filter 34, the intermediate filter layer 33 and the stainless steel fine filter 32, the impurity filter box 3 can effectively remove various impurities in the water, so that when the motor body 2 drives the impeller blade 53 to rotate through the motor shaft 22, it will not be damaged by impurities, so that the impeller assembly 5 is not easy to be damaged, thereby extending the service life. In addition, a positioning shaft 52 and a bearing 4 are provided below the impeller assembly 5, so that the impeller assembly 5 has little shaking when rotating and stable operation, thereby extending the service life of the centrifugal pump. The entire new centrifugal pump has a reasonable structural design, a simple structure, stable operation, an impeller blade 53 that is not easy to be damaged, an impeller blade 53 that is easy to replace, a long service life and good practicality.

[0026] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A liquid feeding centrifugal pump, comprising a pump body (1), Features: The pump body (1) is provided with a motor body (2) at the lower end thereof, a centrifugal chamber body (11) is installed in the pump body (1), a water outlet pipe (111) is installed outside the centrifugal chamber body (11), an impurity filter box (3) is provided at the inner bottom of the pump body (1), the impurity filter box (3) comprises a stainless steel positioning plate (31) and a stainless steel fine filter screen (32), the stainless steel positioning plate (31) is detachably connected to the pump body (1), and a plurality of centrifugal chamber water inlet holes (311) are provided on the stainless steel positioning plate (31), the stainless steel fine filter screen (32) is a rectangular parallelepiped structure, and the stainless steel fine filter screen (32) and the stainless steel positioning plate (31) are welded and fixed, an intermediate filter layer (33) is sleeved on the outer surface of the stainless steel fine filter screen (32), the main body material of the intermediate filter layer (33) is a flexible material, and the outer surface of the intermediate filter layer (33) is sleeved A stainless steel coarse filter (34) is provided. A bearing (4) is fixedly connected to the middle part of the inner side of the stainless steel positioning plate (31). The motor body (2) comprises a motor bracket (21) and a motor shaft (22). The motor shaft (22) passes through the interior of the centrifugal chamber body (11). The motor shaft (22) is movably connected to the centrifugal chamber body (11). The upper end of the motor shaft (22) is connected to a threaded connection part (221). An impeller assembly (5) is threadedly connected to the threaded connection part (221). The impeller assembly (5) comprises a threaded tube (51), a positioning shaft (52) and an impeller blade (53). The inner side of the threaded tube (51) is threadedly connected to the threaded connection part (221). The upper end of the threaded tube (51) is welded and fixed to the impeller blade (53). The threaded tube (51) is welded and fixed to the positioning shaft (52). The lower end of the positioning shaft (52) is inserted into the inner side of the bearing (4).

2. A liquid feeding centrifugal pump according to claim 1, Features: A plurality of groups of bolts are inserted between the stainless steel fine filter (32), the intermediate filter layer (33) and the stainless steel coarse filter (34), and the stainless steel fine filter (32), the intermediate filter layer (33) and the stainless steel coarse filter (34) are assembled by bolts.

3. A liquid feeding centrifugal pump according to claim 1, Features: The wall thickness of the stainless steel fine filter (32) is 1.5 mm, the wall thickness of the impurity filter box (3) is 1-5 mm, and the wall thickness of the stainless steel coarse filter (34) is 1-3 mm.

4. A liquid feeding centrifugal pump according to claim 1, Features: The flexible material of the intermediate filter layer (33) is an activated carbon filter, a sponge filter layer or a gauze filter layer.

5. A liquid feeding centrifugal pump according to claim 1, Features: At least one screw hole is arranged on the outer surface of the threaded tube (51), and a limit screw is threadedly connected in each screw hole, and the threaded tube (51) is locked by the limit screw.

6. A liquid feeding centrifugal pump according to claim 1, Features: The motor shaft (22), the threaded tube (51), the positioning shaft (52) and the impeller blade (53) are all made of stainless steel.

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