Splicing type multi-stage centrifugal pump

Abstract

The spliced multi-stage centrifugal pump comprises a centrifugal pump base, grading pump boxes and a water inlet guide cover, a motor is fixedly installed on one side of the centrifugal pump base, the output end of the motor is detachably connected with a spline shaft rod through a coupler, the multiple grading pump boxes are adjacently arranged and spliced one by one, and a liquid outlet is formed in the surface of the centrifugal pump base. The water inlet guide cover is fixed to one side of one grading pump box and used for guiding out water, and each grading pump box comprises a pump box body, a sealing end cover, a centrifugal worm gear and a liquid guide wheel, wherein the centrifugal worm gear and the liquid guide wheel are rotationally installed on the inner side of the pump box body. According to the utility model, a user can freely combine centrifugal pump boxes with different lifts and flows according to actual requirements, so that the requirements of flexible adjustment and coping with different working conditions are realized, the motor is kept working in a rated power state, and proper lifts and flows are selected according to actual requirements; and the problems that the motor is damaged and the energy utilization rate is reduced when the motor is in a low-power or high-power state are solved, and the practicability of the centrifugal pump is improved.

Description

Technical Field

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

[0002] A multistage centrifugal pump is a device used to increase the pressure and flow of water or other fluids. It is composed of multiple centrifugal pumps in cascade, and each stage can increase the pressure of the fluid. In a multistage centrifugal pump, the fluid first passes through one centrifugal pump, then passes through the next centrifugal pump, and so on, until the required flow and pressure are reached. Traditional multistage centrifugal pumps are usually composed of multiple centrifugal pumps in cascade to increase the head and flow of the water pump to meet the needs of different working conditions. However, the existing multistage centrifugal pumps have some shortcomings to a certain extent.

[0003] Due to the fixed connection between each stage of the pump and the limitation of the design structure, the head of the existing multi-stage centrifugal pump is often difficult to adjust, and it is unable to meet the flexible demand for head in different usage scenarios. This leads to the situation that in some engineering applications, users need to frequently replace pumps with different heads to adapt to different working conditions. Due to the complexity of the fixed connection and structural design between each stage of the pump, for the existing multi-stage centrifugal pump, once a failure occurs or maintenance is required, the entire pump body often needs to be disassembled for maintenance, which is not only time-consuming and labor-intensive, but also increases the difficulty and cost of maintenance. In view of this, the existing problems are studied and improved, and a spliced ​​multi-stage centrifugal pump is provided to solve the current problems, aiming to achieve the purpose of solving problems and improving practical value through this technology. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0005] To this end, the technical solution adopted by the utility model is: a spliced ​​multi-stage centrifugal pump, comprising: a centrifugal pump seat, a graded pump box and a water inlet guide cover, a motor is fixedly installed on one side of the centrifugal pump seat, the output end of the motor is detachably connected to a spline shaft through a coupling, several graded pump boxes are arranged adjacent to each other and spliced ​​one by one, a liquid outlet is provided on the surface of the centrifugal pump seat, the water inlet guide cover is fixed to one side of one of the graded pump boxes for the outlet of water, the graded pump box comprises a pump box body, a sealing end cover, and a centrifugal worm gear and a liquid guide wheel rotatably installed on the inner side of the pump box body, the number of the sealing end covers is two and they are respectively fixed on both sides of the pump box body, the inner side of the centrifugal worm gear is provided with a spline hole sleeved on the surface of the spline shaft, and the inner side of the liquid guide wheel is provided with a bearing sleeved on the surface of the spline shaft.

[0006] In a preferred example, the utility model can be further configured as follows: a liquid guide hole located at the axis is opened on the surface of the sealing end cover, and a buckle ear adapted to the liquid guide hole on the surface of the sealing end cover is provided on one side of the water inlet guide cover.

[0007] In a preferred example, the utility model can be further configured as follows: the centrifugal worm gear is used to centrifugally pump the water during rotation, and the liquid guide wheel is rotatably sleeved on the surface of the spline shaft for radial transportation of the water.

[0008] In a preferred example, the utility model can be further configured as follows: a plurality of vortex vanes for axial flow guidance are provided on the surface of the liquid guide wheel, and the rotational arrangement direction of the vortex vanes is opposite to the rotation direction of the vanes of the centrifugal worm wheel.

[0009] In a preferred example, the utility model can be further configured as follows: the centrifugal worm wheel and the liquid guide wheel have equal diameters and a gap is provided with the inner side of the pump box body.

[0010] In a preferred example, the utility model can be further configured as follows: the liquid outlet is arranged tangentially on the surface of the centrifugal pump seat, and the inner side of the centrifugal pump seat is provided with a conical guide seat sleeved on the outer periphery of the spline shaft.

[0011] The beneficial effects achieved by the utility model are:

[0012] 1. In the utility model, by setting up a number of splicable graded pump box structures, users can freely combine centrifugal pump boxes with different heads and flow rates according to actual needs, realize flexible adjustment and meet the needs of different working conditions, keep the motor working at rated power, select appropriate head and flow rate according to actual needs, and avoid motor damage and reduced energy utilization caused by low power or high power state of the motor, thereby improving the practicality of the centrifugal pump.

[0013] 2. In the utility model, a complete structure of the pump body is formed by the combination of multiple graded pump boxes. The user can maintain or replace only a single centrifugal pump box that has a fault according to needs without disassembling the entire water pump system, which greatly reduces maintenance costs and repair difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the exploded structure of an embodiment of the utility model;

[0016] Figure 3 This is a schematic diagram of the exploded structure of a graded pump box according to an embodiment of the utility model;

[0017] Figure 4This is a structural schematic diagram of one side of a graded pump box according to an embodiment of the utility model.

[0018] Reference numerals:

[0019] 100, centrifugal pump seat; 110, motor; 120, liquid outlet; 130, spline shaft;

[0020] 200, graded pump box; 210, pump box body; 220, sealing end cover; 230, centrifugal worm gear; 240, liquid guide wheel; 211, combined screw hole; 300, water inlet guide cover. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0022] A spliced ​​multi-stage centrifugal pump provided by some embodiments of the utility model is described below in conjunction with the accompanying drawings.

[0023] Combination Figure 1-4 As shown, the utility model provides a spliced ​​multi-stage centrifugal pump, comprising: a centrifugal pump seat 100, a graded pump box 200 and a water inlet guide cover 300, a motor 110 is fixedly installed on one side of the centrifugal pump seat 100, and the output end of the motor 110 is detachably connected to a spline shaft 130 through a coupling, a plurality of graded pump boxes 200 are arranged adjacent to each other and spliced ​​one by one, a liquid outlet 120 is provided on the surface of the centrifugal pump seat 100, and the water inlet guide cover 300 is fixed to one of the graded pump boxes 2 One side of 00 is used for dewatering the water. The graded pump box 200 includes a pump box body 210, a sealing end cover 220, and a centrifugal worm gear 230 and a liquid guide wheel 240 rotatably mounted on the inner side of the pump box body 210. There are two sealing end covers 220, which are respectively fixed on both sides of the pump box body 210. The inner side of the centrifugal worm gear 230 is provided with a spline hole sleeved on the surface of the spline shaft 130, and the inner side of the liquid guide wheel 240 is provided with a bearing sleeved on the surface of the spline shaft 130.

[0024] In this embodiment, a liquid guide hole located at the axis is opened on the surface of the sealing end cover 220, and a buckle ear matched with the liquid guide hole on the surface of the sealing end cover 220 is provided on one side of the water inlet guide cover 300.

[0025] Specifically, buckle ears are used to realize the rapid splicing and combination of the water inlet guide cover 300 and the surface of the sealing end cover 220, and the axial liquid guide hole of the sealing end cover 220 is used to axially transport the water.

[0026] In this embodiment, the centrifugal worm gear 230 is used to centrifugally pump the water during rotation, and the liquid guide wheel 240 is rotatably sleeved on the surface of the spline shaft 130 for radial transportation of the water.

[0027] In this embodiment, a plurality of vortex vanes for axial flow guidance are provided on the surface of the liquid guide wheel 240 , and the rotation direction of the vortex vanes is opposite to the rotation direction of the vanes of the centrifugal worm wheel 230 .

[0028] Specifically, the free rotation of the liquid guide wheel 240 can make the water inside the pump box body 210 re-concentrate to the axis of the pump box body 210 under the centrifugal vortex, and flow to the inside of the next-level graded pump box 200 through the sealing end cover 220.

[0029] In this embodiment, the centrifugal worm wheel 230 and the liquid guide wheel 240 have the same diameter and a gap is provided between them and the inner side of the pump box body 210 .

[0030] In this embodiment, the liquid outlet 120 is arranged tangentially on the surface of the centrifugal pump seat 100 , and a conical guide seat sleeved on the outer circumference of the spline shaft 130 is provided on the inner side of the centrifugal pump seat 100 .

[0031] Specifically, the axial water liquid is diffused and guided through the conical guide seat inside the centrifugal pump seat 100, and the swirling flow is discharged through the liquid outlet 120 on the surface of the centrifugal pump seat 100.

[0032] The working principle and use process of this utility model:

[0033] When the multi-stage centrifugal pump is used, the number of graded pump boxes 200 required for the required head and flow rate is calculated according to the rated power of the motor 110, and several graded pump boxes 200 are combined and spliced ​​through the surface pump box body 210, and the two sections are connected to the surface of the water inlet guide cover 300 and the centrifugal pump seat 100. When the motor 110 is working, the centrifugal worm gear 230 inside each pump box body 210 is driven to rotate through the spline shaft 130 to introduce water and centrifuge it. The free rotation of the liquid guide wheel 240 can make the water inside the pump box body 210 re-concentrate to the axis center of the pump box body 210 under the centrifugal vortex, and flow to the inside of the next-level graded pump box 200 through the sealing end cover 220, and enter the centrifugal pump seat 100 after being pressurized by the multi-stage graded pump box 200 and vortex-out through the liquid outlet 120.

[0034] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A spliced ​​multistage centrifugal pump, characterized in that: include: A centrifugal pump seat (100), a graded pump box (200) and a water inlet guide cover (300), wherein a motor (110) is fixedly mounted on one side of the centrifugal pump seat (100), and an output end of the motor (110) is detachably connected to a spline shaft (130) via a coupling, and a plurality of graded pump boxes (200) are arranged adjacent to each other and spliced ​​one by one, a liquid outlet (120) is provided on the surface of the centrifugal pump seat (100), and the water inlet guide cover (300) is fixed to one side of one of the graded pump boxes (200) for guiding water. The grading pump box (200) comprises a pump box body (210), a sealing end cover (220), and a centrifugal worm wheel (230) and a liquid guide wheel (240) rotatably mounted on the inner side of the pump box body (210). The sealing end cover (220) is two in number and is respectively fixed on two sides of the pump box body (210). The inner side of the centrifugal worm wheel (230) is provided with a spline hole sleeved on the surface of the spline shaft (130), and the inner side of the liquid guide wheel (240) is provided with a bearing sleeved on the surface of the spline shaft (130).

2. A spliced ​​multistage centrifugal pump according to claim 1, characterized in that: The surface of the sealing end cover (220) is provided with a liquid guide hole located at the axis, and one side of the water inlet guide cover (300) is provided with a buckle ear that matches the liquid guide hole on the surface of the sealing end cover (220).

3. A spliced ​​multistage centrifugal pump according to claim 1, characterized in that: The centrifugal worm wheel (230) is used to centrifugally pump the water liquid during rotation, and the liquid guide wheel (240) is rotatably sleeved on the surface of the spline shaft (130) for radial transportation of the water liquid.

4. A spliced ​​multi-stage centrifugal pump according to claim 1, characterized in that: A plurality of vortex blades for axial flow guidance are provided on the surface of the liquid guide wheel (240), and the rotational arrangement direction of the vortex blades is opposite to the rotational direction of the blades of the centrifugal worm wheel (230).

5. A spliced ​​multistage centrifugal pump according to claim 1, characterized in that: The centrifugal worm wheel (230) and the liquid guide wheel (240) have the same diameter and a gap is provided between them and the inner side of the pump box body (210).

6. A spliced ​​multi-stage centrifugal pump according to claim 1, characterized in that: The liquid outlet (120) is arranged tangentially on the surface of the centrifugal pump seat (100), and a conical flow guide seat sleeved on the outer circumference of the spline shaft (130) is provided on the inner side of the centrifugal pump seat (100).

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