Composite centrifugal pump

Abstract

A composite centrifugal pump, comprising a water pump body (1). The rear end of the water pump body (1) is connected to a driving mechanism for driving; an impeller assembly (2) driven by the driving mechanism is provided in the water pump body (1); a water inlet and a water outlet are provided in the water pump body (1); the rear end of the water pump body (1) is detachably provided with a water pump rear cover (3); a water inlet part (4) is integrally provided on the water pump body (1) relative to the water inlet; a filtering assembly (5) is fixedly mounted on the water inlet part (4); the filtering assembly (5) is fixedly connected to the water inlet part (4) by means of fixing bolts; and the filtering assembly consists of a mounting disc (6), a filtering sleeve (7), and a filter screen (8). The structure has a filtering function and can filter out impurities in a water body.

Description

A compound centrifugal pump Technical Field

[0001] The utility model belongs to the technical field of water pumps and relates to a centrifugal pump, in particular to a compound centrifugal pump. Background Art

[0002] The basic structure of a centrifugal pump consists of six parts: the impeller assembly, pump body, pump shaft, bearings, sealing rings, and stuffing box. The impeller assembly is the core of the centrifugal pump, with high speed and high output. The blades on the impeller assembly play a major role. The impeller assembly must pass a static balance test before assembly. The inner and outer surfaces of the impeller assembly must be smooth to reduce friction loss of the water flow.

[0003] The centrifugal pump in the prior art, especially the impeller assembly, is troublesome to disassemble and difficult to repair once it is damaged, which brings inconvenience to the operators. In addition, the motor part and the pump body itself of the centrifugal pump are not easy to remove, so there are certain troubles in the process of transportation and storage. In particular, when repairing the pump body, the motor is heavy and therefore difficult to carry.

[0004] Furthermore, the existing centrifugal pumps do not filter the water during use, so the water contains a large amount of impurities, which affects the quality of the aqueous solution, and further affects the quality of food and medicine, endangering people's health. Summary of the Invention

[0005] The purpose of the utility model is to solve the above problems existing in the prior art and to provide a composite centrifugal pump which is easy to disassemble and has a filtering function.

[0006] The purpose of the utility model can be achieved through the following technical solutions: A compound centrifugal pump, comprising a water pump body, the rear end of the water pump body is connected to a driving mechanism for driving, characterized in that an impeller assembly driven by the driving mechanism is arranged in the water pump body, a water inlet for water intake and a water outlet for water discharge are provided on the water pump body, the rear end of the water pump body is detachably provided with a water pump rear cover, a water inlet is integrally provided on the water pump body and relative to the water inlet, a filter assembly for filtering is fixedly installed on the water inlet, the filter assembly is fixedly connected to the water inlet by fixing bolts, the filter assembly consists of a mounting plate, a filter sleeve and a filter screen, the rear end of the mounting plate is fixedly provided with a positioning portion for strengthening the connection, a positioning slot corresponding to the positioning portion is provided on the water inlet, one end of the filter sleeve extends into the water inlet of the water pump body, and the filter sleeve is provided with a plurality of water holes for water flow, and the filter screen is integrally arranged on the water hole.

[0007] In the above-mentioned composite centrifugal pump, a plurality of fixing seats are provided at the rear end of the water pump body, a connecting seat corresponding to the connecting seat is provided on the water pump rear cover, a positioning column is protruded from the connecting seat, and a positioning hole for the positioning column to extend into is opened on the fixing seat, and the water pump rear cover is fixed to the positioning column by a fixing screw thread so that the water pump rear cover is fixed to the water pump body.

[0008] In the above-mentioned composite centrifugal pump, the impeller assembly consists of an impeller disc and a plurality of blades. The impeller disc is provided with a raised portion having an inclination. The plurality of blades are circumferentially arranged on the impeller disc and are arranged in a curved shape.

[0009] In the above-mentioned composite centrifugal pump, the mounting plate is provided with a stepped portion for reducing water flow buffering.

[0010] In the above-mentioned composite centrifugal pump, the mounting plate is provided with a plurality of mounting holes for mounting the mounting plate.

[0011] Compared with the existing technology, this compound centrifugal pump has a split arrangement of the water pump body and the water pump rear cover. When the internal impeller assembly needs to be repaired, the purpose can be achieved by simply removing the water pump rear cover. In addition, a filter assembly is provided on the water pump body to filter the water flow when water enters the water pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG1 is a schematic structural diagram of the present utility model.

[0013] FIG2 is a schematic cross-sectional view of the present invention.

[0014] FIG3 is a schematic structural diagram of the impeller assembly of the present invention.

[0015] In the figure, 1. Water pump body; 2. Impeller assembly; 3. Water pump back cover; 4. Water inlet; 5. Filter assembly; 6. Mounting plate; 7. Filter sleeve; 8. Filter screen; 9. Positioning part; 10. Positioning slot; 11. Water hole; 12. Fixing seat; 13. Connecting seat; 14. Positioning column; 15. Impeller disc; 16. Blades; 17. Protrusion. Implementation Method

[0016] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0017] As shown in Figures 1, 2 and 3, the composite centrifugal pump comprises a water pump body 1, the rear end of the water pump body 1 is connected to a driving mechanism for driving, the water pump body 1 is provided with an impeller assembly 2 driven by the driving mechanism, the water pump body 1 is provided with a water inlet for water intake and a water outlet for water discharge, the rear end of the water pump body 1 is detachably provided with a water pump rear cover 3, the water pump body 1 is provided with a water inlet portion 4 integrally provided with respect to the water inlet, the water inlet portion 4 is fixedly installed with a filter for filtering The filter assembly 5 is fixedly connected to the water inlet 4 by fixing bolts. The filter assembly 5 is composed of a mounting plate 6, a filter sleeve 7 and a filter screen 8. The rear end of the mounting plate 6 is fixedly provided with a positioning portion 9 for strengthening the connection. The water inlet 4 is provided with a positioning slot 10 corresponding to the positioning portion 9. One end of the filter sleeve 7 extends into the water inlet of the water pump body 1, and the filter sleeve 7 is provided with a plurality of water holes 11 for passing water. The filter screen 8 is integrally provided on the water holes 11. When the driving mechanism starts to drive the impeller assembly 2 to start working, the water flow is sucked into the water pump body 1 from the water inlet of the water pump body 1. While being sucked in, it is filtered by the filter assembly 5 provided at the water inlet 4, avoiding the problem of a large amount of impurities in the water during use.

[0018] In further detail, the rear end of the water pump body 1 is provided with a plurality of fixing seats 12. The water pump rear cover 3 is provided with a connecting seat 13 corresponding to the connecting seat 13. The connecting seat 13 is provided with a positioning post 14 protruding from the fixing seat 12. The fixing seat 12 is provided with a positioning hole for the positioning post 14 to extend into. The water pump rear cover 3 is threadedly fixed to the positioning post 14 by fixing screws, thereby fixing the water pump rear cover 3 to the water pump body 1. The fixing screw extends into the fixing seat 12 and passes through the positioning post 14. The positioning post 14 is provided with an opening for the fixing screw to pass through.

[0019] To elaborate further, when the water pump rear cover 3 needs to be disassembled, the fixing screws are removed from the fixing seat 12 to release the positioning of the positioning column 14, and the water pump rear cover 3 can be disassembled from the water pump body 1. This structure is convenient for repairing the impeller assembly 2 arranged inside the water pump body 1, and the water pump rear cover 3 can be directly removed.

[0020] In further detail, the impeller assembly 2 is composed of an impeller disk 15 and a plurality of blades 16. The impeller disk 15 is provided with a protrusion 17, and the protrusion 17 has an inclination. The plurality of blades 16 are circumferentially arranged on the impeller disk 15 and are arranged in a curved shape.

[0021] Preferably, the mounting plate 6 is provided with a stepped portion for reducing water flow buffering.

[0022] Preferably, the mounting plate 6 is provided with a plurality of mounting holes for mounting the mounting plate 6 .

[0023] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0024] Although this document frequently uses terms such as the water pump body 1, impeller assembly 2, water pump rear cover 3, water inlet 4, filter assembly 5, mounting plate 6, filter sleeve 7, filter screen 8, positioning portion 9, positioning slot 10, water hole 11, fixing seat 12, connecting seat 13, positioning column 14, impeller disc 15, blade 16, and protrusion 17 in the figures, the use of other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A composite centrifugal pump, comprising a water pump body (1), wherein a driving mechanism for driving is connected to the rear end of the water pump body (1), characterized in that: The water pump body (1) is provided with an impeller assembly (2) driven by a driving mechanism. The water pump body (1) is provided with a water inlet for water intake and a water outlet for water discharge. The rear end of the water pump body (1) is detachably provided with a water pump rear cover (3). The water pump body (1) is provided with a water inlet portion (4) integrally arranged relative to the water inlet. A filter assembly (5) for filtering is fixedly mounted on the water inlet portion (4). The filter assembly (5) is fixedly connected to the water inlet portion (4) by fixing bolts. The filter assembly (5) is composed of a mounting plate (6), a filter sleeve (7) and a filter screen (8); a positioning portion (9) for strengthening the connection is fixedly provided at the rear end of the mounting plate (6); a positioning slot (10) corresponding to the positioning portion (9) is provided on the water inlet portion (4); one end of the filter sleeve (7) extends into the water inlet of the water pump body (1); and a plurality of water holes (11) for passing water are provided on the filter sleeve (7); and the filter screen (8) is integrally arranged on the water hole (11).

2. A compound centrifugal pump according to claim 1, characterized in that: A plurality of fixing seats (12) are arranged at the rear end of the water pump body (1), a connecting seat (13) corresponding to the connecting seat (13) is arranged on the water pump rear cover (3), a positioning column (14) is protruding from the connecting seat (13), a positioning hole for the positioning column (14) to extend into is opened on the fixing seat (12), and the water pump rear cover (3) is fixed to the positioning column (14) by means of fixing screws, so that the water pump rear cover (3) is fixed to the water pump body (1).

3. A compound centrifugal pump according to claim 1, characterized in that: The impeller assembly (2) is composed of an impeller disk (15) and a plurality of blades (16); the impeller disk (15) is provided with a protrusion (17), the protrusion (17) has an inclination, and the plurality of blades (16) are circumferentially arranged on the impeller disk (15) and are arranged in a curved shape.

4. A compound centrifugal pump according to claim 1, characterized in that: The mounting plate (6) is provided with a stepped portion for reducing water flow buffering.

5. A compound centrifugal pump according to claim 1, characterized in that: The mounting plate (6) is provided with a plurality of mounting holes for mounting the mounting plate (6).

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