Combined type centrifugal pump

Abstract

The utility model discloses a combined type centrifugal pump which comprises a pump shell, a water outlet pipe is arranged at the top of the pump shell and communicated with the interior of the pump shell, a combined impeller is arranged in the pump shell, one side of the combined impeller is connected with a rotating shaft, the rotating shaft is rotationally connected with one side wall of the pump shell, and a water inlet pipe is arranged on one side of the pump shell. The water inlet pipe is communicated with the interior of the pump shell, a filter screen is arranged in the water inlet pipe, a collecting box is arranged on the lower side of the water inlet pipe, and a collecting pipe is connected between the collecting box and the water inlet pipe. Solid impurities filtered by the filter screen can be collected into the collecting box, and the situation that the water inlet pipe is blocked due to the fact that the solid impurities are accumulated on one side of the filter screen is avoided; therefore, the centrifugal pump is prevented from being blocked, and normal use of the centrifugal pump is guaranteed.

Description

Technical Field

[0001] The utility model relates to a compound centrifugal pump. Background Art

[0002] The compound centrifugal pump is a kind of high-efficiency pump. It usually adopts a compound impeller design, and the impeller includes blades with different lengths or different blade shapes, so as to optimize the internal flow characteristics of the pump and improve the efficiency and stability of the pump. Many existing compound centrifugal pumps will install a filter screen inside to filter the water flow during the pumping process to avoid large-volume solid impurities entering the pump and causing the impeller to get stuck. However, this filtering method will cause the filtered solid impurities to gradually accumulate on one side of the filter screen, eventually resulting in the blockage of the centrifugal pump and unable to be used normally. Therefore, it is necessary to develop a compound centrifugal pump to solve the above problems. Content of the Utility Model

[0003] The purpose of the utility model is to provide a compound centrifugal pump to solve the problems raised in the above background art.

[0004] To solve the above problems, the utility model adopts the following technical scheme:

[0005] A compound centrifugal pump includes a pump housing. An outlet pipe is provided at the top of the pump housing, and the outlet pipe is communicated with the inside of the pump housing. A compound impeller is provided inside the pump housing. One side of the compound impeller is connected with a rotating shaft, and the rotating shaft is rotatably connected with one side wall of the pump housing. An inlet pipe is provided on one side of the pump housing, and the inlet pipe is communicated with the inside of the pump housing. A filter screen is provided inside the inlet pipe. A collection box is provided on the lower side of the inlet pipe, and a collection pipe is connected between the collection box and the inlet pipe. An installation cylinder is provided on the upper side of the inlet pipe, and an electric control telescopic rod is provided inside the installation cylinder. One end of the electric control telescopic rod is provided with a sealing plug, and the sealing plug is arranged at one end of the collection pipe.

[0006] Preferably, the sealing plug is in a frustum shape, and a rubber plate is provided at the bottom of the sealing plug.

[0007] Preferably, an extension cylinder is provided on one side of the pump housing, a rubber sealing cylinder is provided inside the extension cylinder, a cover plate is provided on one side of the rubber sealing cylinder, and through holes corresponding to the rotating shaft are provided on the rubber sealing cylinder, the cover plate and the side wall of the pump housing.

[0008] Preferably, an installation ring is provided inside the inlet pipe, and the installation ring is fixedly arranged on the inner wall of the inlet pipe. The installation ring and the filter screen are connected by bolts.

[0009] Preferably, a bottom plate is provided on the lower side of the pump housing, a support frame is provided between the pump housing and the bottom plate, and the bottom of the collection box is in contact with the bottom plate.

[0010] The beneficial effects of the present utility model are as follows: The present utility model can collect the solid impurities filtered by the filter screen into the collection box, avoiding the accumulation of these fixed impurities on one side of the filter screen, which may block the water inlet pipe, thereby preventing the centrifugal pump from being blocked and ensuring the normal use of the centrifugal pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art, but this is not a limitation on the protection scope of the present utility model.

[0012] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0013] Figure 2 It is a schematic diagram of the internal structure of the present utility model;

[0014] Figure 3 For the present utility model Figure 2 The enlarged schematic diagram at position A in it;

[0015] Figure 4 For the present utility model Figure 2 The structural schematic diagram of the sealing plug in it.

[0016] In the figure: 11, pump housing; 12, water inlet pipe; 13, water outlet pipe; 14, bottom plate; 15, support frame; 16, collection pipe; 17, collection box; 18, composite impeller; 19, rotating shaft; 20, extension cylinder; 21, rubber sealing cylinder; 22, cover plate; 23, installation cylinder; 24, electric control telescopic rod; 25, sealing plug; 26, installation ring; 27, filter screen; 28, rubber plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Refer to Figures 1 to 4 A compound centrifugal pump shown in the figure, including a pump housing 11, the top of the pump housing 11 is provided with a water outlet pipe 13, the water outlet pipe 13 is communicated with the inside of the pump housing 11, a composite impeller 18 is arranged inside the pump housing 11, one side of the composite impeller 18 is connected with a rotating shaft 19, the rotating shaft 19 is rotatably connected with one side wall of the pump housing 11, one side of the pump housing 11 is provided with a water inlet pipe 12, the water inlet pipe 12 is communicated with the inside of the pump housing 11, a filter screen 27 is arranged inside the water inlet pipe 12, a collection box 17 is arranged below the water inlet pipe 12, a collection pipe 16 is connected between the collection box 17 and the water inlet pipe 12, an installation cylinder 23 is arranged above the water inlet pipe 12, an electric control telescopic rod 24 is arranged inside the installation cylinder 23, one end of the electric control telescopic rod 24 is provided with a sealing plug 25, and the sealing plug 25 is arranged at one end of the collection pipe 16; the collection box 17 can collect the solid impurities filtered by the filter screen 27, a discharge window is opened on one side wall of the collection box 17, and the solid impurities in the collection box 17 can be discharged by opening the window door.

[0018] Furthermore, the sealing plug 25 is in a truncated cone shape, and a rubber plate 28 is provided at the bottom of the sealing plug 25; the sealing plug 25 plugs one end of the collecting tube 16, and the rubber plate 28 is closely attached to the connection between the sealing plug 25 and the collecting tube 16, thereby enhancing the sealing of the connection.

[0019] Furthermore, an extension tube 20 is provided on one side of the pump housing 11, a rubber sealing tube 21 is provided inside the extension tube 20, a cover plate 22 is provided on one side of the rubber sealing tube 21, and a through hole corresponding to the rotating shaft 19 is provided on the rubber sealing tube 21, the cover plate 22 and the side wall of the pump housing 11; the rubber sealing tube 21 has a good sealing and waterproof effect, which can prevent the pump housing 11 from leaking near the rotating shaft 19.

[0020] Furthermore, a mounting ring 26 is provided in the water inlet pipe 12, and the mounting ring 26 is fixedly arranged on the inner wall of the water inlet pipe 12. The mounting ring 26 is connected to the filter screen 27 by bolts; the filter screen 27 can be removed from the water inlet pipe 12 for replacement by unscrewing the bolts between the mounting ring 26 and the filter screen 27.

[0021] Furthermore, a bottom plate 14 is provided at the lower side of the pump housing 11 , a support frame 15 is provided between the pump housing 11 and the bottom plate 14 , and the bottom of the collection box 17 is in contact with the bottom plate 14 .

[0022] The working principle of the utility model is that when conveying water, the rotating shaft 19 is connected to the output shaft of the motor, and the motor is started to rotate the rotating shaft 19, thereby rotating the compound impeller 18, thereby forming a negative pressure in the pump housing 11, so that the water flows into the pump housing 11 from the water inlet pipe 12, and then the water flows out from the water outlet pipe 13 to realize water pumping; the mesh size of the filter 27 is set according to the size of the solid impurities that need to be blocked. When conveying water, the filter 27 filters the solid impurities in the water flow, and these solid impurities fall into the collecting pipe 16 and gradually accumulate. When these solid impurities accumulate to a certain extent, the electric control telescopic rod 24 is started to extend so that the sealing plug 25 descends, and the sealing plug 25 loosens the originally blocked collecting pipe 16, and the solid impurities accumulated in the collecting pipe 16 fall into the collecting box 17 from the gap between the sealing plug 25 and the port of the collecting pipe 16, and then the electric control telescopic rod 24 is recovered so that the sealing plug 25 closes the collecting pipe 16 again, thereby preventing the solid impurities filtered by the filter 27 from clogging the water inlet pipe 12, thereby preventing the centrifugal pump from being blocked.

[0023] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. A compound centrifugal pump, characterized in that: It includes a pump housing. An outlet pipe is provided at the top of the pump housing, and the outlet pipe is communicated with the inside of the pump housing. A composite impeller is provided in the pump housing. One side of the composite impeller is connected with a rotating shaft, and the rotating shaft is rotatably connected with a side wall of the pump housing. An inlet pipe is provided on one side of the pump housing, and the inlet pipe is communicated with the inside of the pump housing. A filter screen is provided in the inlet pipe, and a collection box is provided on the lower side of the inlet pipe. A collection pipe is connected between the collection box and the inlet pipe. An installation cylinder is provided on the upper side of the inlet pipe, and an electric control telescopic rod is provided in the installation cylinder. One end of the electric control telescopic rod is provided with a sealing plug, and the sealing plug is arranged at one end of the collection pipe.

2. The composite centrifugal pump according to claim 1, characterized in that: The sealing plug is in a frustum shape, and a rubber plate is provided at the bottom of the sealing plug.

3. A compound centrifugal pump according to claim 1, characterized in that: An extension cylinder is provided on one side of the pump housing, a rubber sealing cylinder is provided in the extension cylinder, a cover plate is provided on one side of the rubber sealing cylinder, and through holes corresponding to the rotating shaft are provided on the rubber sealing cylinder, the cover plate and the side wall of the pump housing.

4. A compound centrifugal pump according to claim 1, wherein: An installation ring is provided in the inlet pipe, and the installation ring is fixedly arranged on the inner wall of the inlet pipe. The installation ring and the filter screen are connected by bolts.

5. A compound centrifugal pump according to claim 1, characterized in that: A bottom plate is provided on the lower side of the pump housing, a support frame is provided between the pump housing and the bottom plate, and the bottom of the collection box is in contact with the bottom plate.

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