Multi-stage centrifugal pump

Abstract

The utility model relates to a multi-stage centrifugal pump in the technical field of centrifugal pumps. A filter screen plate for filtering rainwater is fixedly mounted in a pipe cavity of a water inlet pipe; a driving assembly used for driving the sweeping assembly to rotate is arranged on the front side of the sweeping assembly, and a supporting assembly used for supporting the driving assembly is arranged on the front side of the driving assembly. A rotating shaft I for driving the sealing plate I to rotate is arranged at the top end of the sealing plate I; a blocking assembly used for sealing the slag removal pipe is arranged in a pipe cavity of the slag removal pipe. The extracted water flow can impact the impeller to drive the two scrapers to clean the filter screen plate, so that filter holes in the filter screen plate are prevented from being blocked; the first hand wheel can drive the first rotating shaft to rotate, the first sealing plate seals the water inlet pipe, then the second hand wheel drives the rotating shaft to rotate, the second sealing plate can open the slag removal pipe, cleaning water is introduced into the water inlet pipe, and impurities on the front side of the filter screen plate can be discharged through the slag removal pipe.

Description

Technical Field

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

[0002] In the process of recycling and reusing rainwater, it is necessary to pump the rainwater in the rainwater well into the reservoir through a centrifugal pump for sedimentation and filtration, and then sterilize and disinfect the filtered rainwater through an ultraviolet sterilizer, and finally transport it to the clean water tank; wherein the multistage centrifugal pump is a combination of two or more centrifugal pumps with the same function, and in terms of the fluid channel structure, the medium pressure relief port of the first stage is connected to the inlet of the second stage, and the medium pressure relief port of the second stage is connected to the inlet of the third stage, so that the series mechanism forms a multistage centrifugal pump; and when the existing centrifugal pump is in use, outdoor rainwater will cause the centrifugal pump to be blocked. For example, as shown in a multistage centrifugal pump with Chinese patent application number CN202221402727.9, support frames are arranged on both sides of the bottom end of the centrifugal pump body, and an auxiliary structure is arranged at the bottom end of the support frame, and the auxiliary structure includes a connecting block, an adjusting groove and an adjusting seat, and the connecting block is arranged at the bottom end of the support frame, and an adjusting groove is arranged inside the connecting block, and an adjusting seat is arranged inside the adjusting groove, and a water outlet is arranged on one side of the centrifugal pump body.

[0003] However, when the multi-stage centrifugal pump pumps outdoor rainwater into the reservoir for sedimentation and filtration treatment, since the outdoor rainwater is mixed with impurities such as leaves, it can then be filtered through the filter net to the water inlet pipe, but some impurities will enter the multi-stage centrifugal pump, which will cause the multi-stage centrifugal pump to become blocked and affect the normal use of the multi-stage centrifugal pump. Utility Model Content

[0004] In order to solve the problem that when the multi-stage centrifugal pump proposed in the above background technology pumps outdoor rainwater into the water storage tank for sedimentation and filtration treatment, since the outdoor rainwater is mixed with impurities such as leaves, it can then be filtered through the filter net to the water inlet pipe, but impurities will still enter the multi-stage centrifugal pump, which will cause the multi-stage centrifugal pump to be blocked and affect the normal use of the multi-stage centrifugal pump, the utility model provides the following technical solutions:

[0005] A multi-stage centrifugal pump comprises a multi-stage separation pump body for extracting rainwater, a water outlet pipe for discharging rainwater from the multi-stage separation pump body is arranged on the right side of the multi-stage separation pump body, a water inlet pipe for extracting rainwater is arranged on the front side of the multi-stage separation pump body, a cleaning device for cleaning impurities in rainwater is arranged in the water inlet pipe, a blocking device 1 for sealing the water inlet pipe is arranged in the water inlet pipe, and a blocking device 2 for discharging impurities cleaned by the cleaning device is arranged at the bottom end of the water inlet pipe.

[0006] A filter screen plate for filtering rainwater is fixedly installed in the tube cavity of the water inlet pipe.

[0007] The cleaning device comprises a cleaning assembly for cleaning the front side of the filter screen plate, a driving assembly for driving the cleaning assembly to rotate is arranged on the front side of the cleaning assembly, and a supporting assembly for supporting the driving assembly is arranged on the front side of the driving assembly.

[0008] The blocking device includes a sealing plate 1 arranged at the rear side of the filter plate for sealing the water inlet pipe, a rotating shaft 1 for driving the sealing plate 1 to rotate is arranged at the top end of the sealing plate 1, and a hand wheel 1 for driving the rotating shaft 1 to rotate is arranged at the top end of the rotating shaft 1.

[0009] The second blocking device comprises a slag removal pipe fixedly mounted on the bottom end of the water inlet pipe, and a blocking component for sealing the slag removal pipe is arranged in the tube cavity of the slag removal pipe.

[0010] Furthermore, the driving assembly includes a transmission shaft arranged on the filter screen plate for rotation, and an impeller for driving the transmission shaft to rotate is fixedly mounted on the rod body of the transmission shaft.

[0011] Furthermore, the cleaning assembly includes a turntable fixedly mounted on the transmission shaft for rotation, and a scraper for cleaning the front side of the filter screen is fixedly mounted on the turntable body, and there are two scrapers.

[0012] Furthermore, the support assembly includes a fixing plate movably connected to the front end of the transmission shaft, and support rods for supporting the fixing plate are fixedly mounted on the platform of the fixing plate, and there are three support rods.

[0013] Furthermore, the blocking assembly includes a sealing plate 2 for sealing the slag removal pipe, a rotating shaft 2 for driving the sealing plate 2 to rotate is fixedly installed at the front end of the sealing plate 2, and a hand wheel 2 for driving the rotating shaft 2 to rotate is fixedly installed at the front end of the rotating shaft 2.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] By arranging a cleaning device, a blocking device 1 and a blocking device 2, when the extracted water flow impacts the impeller to rotate and drive the transmission shaft to rotate, the turntable can be driven to drive the two scrapers to clean the filter screen to prevent the filter holes on the filter screen from being blocked; when it is necessary to discharge the impurities on the front side of the filter screen, the hand wheel 1 can be used to drive the rotating shaft 1 to rotate, so that the sealing plate 1 can seal the water inlet pipe, and then the hand wheel 2 can be used to drive the rotating shaft to rotate, so that the sealing plate 2 can open the slag removal pipe, and then cleaning water can be introduced into the water inlet pipe, so that the impurities on the front side of the filter screen can be discharged through the slag removal pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a cross-sectional view of the water outlet pipe of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the cleaning device of the utility model;

[0019] Figure 4 This is a diagram showing the coordination of blocking device 1 and blocking device 2 of the utility model.

[0020] In the accompanying drawings, the names of the components represented by the reference numerals are listed as follows:

[0021] 1000-Multistage separation pump body;

[0022] 200-water outlet pipe;

[0023] 300-water inlet pipe, 301-filter screen plate;

[0024] 400-cleaning device, 410-support assembly, 411-fixed plate, 412-support rod, 420-drive assembly, 421-transmission shaft, 422-impeller, 430-cleaning assembly, 431-turntable, 432-scraper;

[0025] 500-blocking device 1, 510-hand wheel 1, 520-rotating shaft 1, 530-sealing plate 1;

[0026] 600 - blocking device 2, 610 - slag removal pipe, 620 - blocking assembly, 621 - hand wheel 2, 622 - rotating shaft 2, 623 - sealing plate 2. DETAILED DESCRIPTION

[0027] The preferred specific implementation methods for implementing the present utility model are described in detail below, and a clear and complete description is made in conjunction with the accompanying drawings.

[0028] See also Figure 1-Figure 4 , the utility model provides a multi-stage centrifugal pump.

[0029] It includes a multi-stage separation pump body 100 for extracting rainwater, so that the multi-stage separation pump body 100 can be used to pump rainwater in the rainwater well into a reservoir through a centrifugal pump for sedimentation and filtration, and then the filtered rainwater is sterilized and disinfected by an ultraviolet sterilizer, and finally transported to a clean water tank; a water outlet pipe 200 for discharging rainwater in the multi-stage separation pump body 100 is arranged on the right side of the multi-stage separation pump body 100, and a water inlet pipe 300 for extracting rainwater is arranged on the front side of the multi-stage separation pump body 100, a cleaning device 400 for cleaning impurities in the rainwater is arranged in the water inlet pipe 300, a blocking device 1 500 for sealing the water inlet pipe 300 is arranged in the water inlet pipe 300, and a blocking device 2 600 for discharging impurities cleaned by the cleaning device 400 is arranged at the bottom of the water inlet pipe 300.

[0030] A filter screen 301 for filtering rainwater is fixedly installed in the lumen of the water inlet pipe 300 , so that impurities in the rainwater can be filtered by the filter screen 301 .

[0031] The cleaning device 400 includes a cleaning component 430 for cleaning the front side of the filter screen plate 301 , a driving component 420 for driving the cleaning component 430 to rotate is disposed on the front side of the cleaning component 430 , and a supporting component 410 for supporting the driving component 420 is disposed on the front side of the driving component 420 .

[0032] The driving assembly 420 includes a transmission shaft 421 arranged on the filter screen plate 301 for rotation, and the rear end of the transmission shaft 421 is connected to the plate body of the filter screen plate 301 through a bearing to facilitate the rotation of the transmission shaft 421; an impeller 422 for driving the transmission shaft 421 to rotate is fixedly installed on the rod body of the transmission shaft 421; so that rainwater in the rainwater well can be extracted into the multi-stage separation pump body 100 through the water inlet pipe 300; the extracted water flow will impact the impeller 422 to rotate and drive the transmission shaft 421 to rotate.

[0033] The cleaning assembly 430 includes a turntable 431 fixedly mounted on the transmission shaft 421 for rotation, and a scraper 432 for cleaning the front side of the filter screen plate 301 is fixedly mounted on the body of the turntable 431, and there are two scrapers 432, which are symmetrically distributed on the body of the turntable 431, and at the same time, the two scrapers 432 are tightly attached to the front side of the filter screen plate 301; therefore, when the extracted water flow impacts the impeller 422 to rotate and drive the transmission shaft 421 to rotate, the turntable 431 can be driven to drive the two scrapers 432 to clean the filter screen plate 301 to prevent the filter holes on the filter screen plate 301 from being blocked.

[0034] The support assembly 410 includes a fixed plate 411 movably connected to the front end of the transmission shaft 421. A support rod 412 for supporting the fixed plate 411 is fixedly installed on the platform of the fixed plate 411. There are three support rods 412, which are welded in a circular array in the tube cavity of the water inlet pipe 300.

[0035] The blocking device 500 includes a sealing plate 530 arranged at the rear side of the filter screen plate 301 for sealing the water inlet pipe 300, a rotating shaft 520 for driving the sealing plate 530 to rotate is arranged at the top end of the sealing plate 530, and a hand wheel 510 for driving the rotating shaft 520 to rotate is arranged at the top end of the rotating shaft 520; thus, when it is necessary to discharge impurities on the front side of the filter screen plate 301, the rotating shaft 520 can be driven to rotate by the hand wheel 510, so that the sealing plate 530 can seal the water inlet pipe 300, and then the slag removal pipe 610 can be opened by the blocking component 620; and then cleaning water is introduced into the water inlet pipe 300, so that the impurities on the front side of the filter screen plate 301 can be discharged through the slag removal pipe 610.

[0036] The second blocking device 600 includes a slag removal pipe 610 fixedly mounted on the bottom end of the water inlet pipe 300 , and a blocking component 620 for sealing the slag removal pipe 610 is arranged in the lumen of the slag removal pipe 610 .

[0037] The blocking component 620 includes a sealing plate 623 for sealing the slag removal pipe 610, a rotating shaft 622 for driving the sealing plate 623 to rotate is fixedly installed at the front end of the sealing plate 623, and a hand wheel 621 for driving the rotating shaft 622 to rotate is fixedly installed at the front end of the rotating shaft 622; therefore, when it is necessary to discharge impurities on the front side of the filter screen plate 301, the rotating shaft 520 can be driven to rotate by the hand wheel 510, so that the sealing plate 530 can seal the water inlet pipe 300, and then the rotating shaft 622 can be driven to rotate by the hand wheel 621, so that the sealing plate 623 can open the slag removal pipe 610, and then cleaning water is introduced into the water inlet pipe 300, so that the impurities on the front side of the filter screen plate 301 can be discharged through the slag removal pipe 610.

[0038] Based on the above content and the accompanying drawings, those skilled in the art can understand and implement the utility model. In addition, any non-creative modifications made to the utility model by those skilled in the art without making creative work still fall within the scope of protection of the utility model.

Claims

1. A multistage centrifugal pump, characterized in that: The invention comprises a multi-stage separation pump body (100) for extracting rainwater, wherein a water outlet pipe (200) for discharging rainwater in the multi-stage separation pump body (100) is arranged on the right side of the multi-stage separation pump body (100), a water inlet pipe (300) for extracting rainwater is arranged on the front side of the multi-stage separation pump body (100), a cleaning device (400) for cleaning impurities in rainwater is arranged in the water inlet pipe (300), a blocking device (1) for sealing the water inlet pipe (300) is arranged in the water inlet pipe (300), and a blocking device (2) for discharging impurities cleaned by the cleaning device (400) is arranged at the bottom end of the water inlet pipe (300); A filter screen plate (301) for filtering rainwater is fixedly installed in the lumen of the water inlet pipe (300); The cleaning device (400) comprises a cleaning assembly (430) for cleaning the front side of the filter screen plate (301); a driving assembly (420) for driving the cleaning assembly (430) to rotate is disposed on the front side of the cleaning assembly (430); and a supporting assembly (410) for supporting the driving assembly (420) is disposed on the front side of the driving assembly (420); The blocking device (500) comprises a sealing plate (530) disposed at the rear side of the filter screen plate (301) for sealing the water inlet pipe (300), a rotating shaft (520) for driving the sealing plate (530) to rotate is disposed at the top end of the sealing plate (530), and a hand wheel (510) for driving the rotating shaft (520) to rotate is disposed at the top end of the rotating shaft (520); The second blocking device (600) comprises a slag removal pipe (610) fixedly mounted on the bottom end of the water inlet pipe (300), and a blocking component (620) for sealing the slag removal pipe (610) is arranged in the lumen of the slag removal pipe (610).

2. A multistage centrifugal pump according to claim 1, characterized in that: The driving assembly (420) comprises a transmission shaft (421) arranged on the filter screen plate (301) for rotation, and an impeller (422) for driving the transmission shaft (421) to rotate is fixedly mounted on the rod body of the transmission shaft (421).

3. A multistage centrifugal pump according to claim 2, characterized in that: The cleaning assembly (430) comprises a turntable (431) fixedly mounted on a transmission shaft (421) for rotation, and a scraper (432) for cleaning the front side of the filter screen plate (301) is fixedly mounted on the body of the turntable (431), and there are two scrapers (432).

4. A multistage centrifugal pump according to claim 3, characterized in that: The support assembly (410) comprises a fixed plate (411) movably connected to the front end of the transmission shaft (421), and support rods (412) for supporting the fixed plate (411) are fixedly mounted on the platform of the fixed plate (411), and there are three support rods (412).

5. A multistage centrifugal pump according to claim 1, characterized in that: The blocking assembly (620) includes a sealing plate 2 (623) for sealing the slag removal pipe (610), a rotating shaft 2 (622) for driving the sealing plate 2 (623) to rotate is fixedly installed at the front end of the sealing plate 2 (623), and a hand wheel 2 (621) for driving the rotating shaft 2 (622) to rotate is fixedly installed at the front end of the rotating shaft 2 (622).

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