Pump sleeve connecting structure of submersible electric pump for well

Abstract

The pump sleeve connecting structure of the submersible electric pump for the well comprises an upper-section pump sleeve, a lower-section pump sleeve, a bearing body part and a connecting piece, and is characterized in that the upper-section pump sleeve and the lower-section pump sleeve are respectively sleeved on the upper part and the lower part of the bearing body part, and the upper part and the lower part of the bearing body part are respectively provided with a screw hole; a through hole I is formed in the position, corresponding to the screw hole of the bearing body component, of the upper section pump sleeve, a through hole II is formed in the position, corresponding to the screw hole of the bearing body component, of the lower section pump sleeve, the connecting piece is two screws, and the two screws penetrate through the through hole I and the through hole II respectively to be in threaded connection with the screw hole in the bearing body component. The pump sleeve connecting structure of the submersible electric pump for the well has the advantages of being reasonable in design, simple in structure, even in compression force, small in pressure difference in a single-section pump cavity and easy to assemble, production efficiency is improved, manufacturing cost is reduced, and meanwhile a long electric pump can obtain more excellent performance.

Description

TECHNICAL FIELD

[0001] The utility model belongs to centrifugal pump technical field, especially involves a pump cover connection structure of well submersible electric pump. BACKGROUND

[0002] Well submersible pump is the motor and water pump direct connection integrated dive into water work's water lifting machine, it is applicable to the extraction of groundwater from deep well, also can be used for river, reservoir, water channel etc. water lifting engineering: mainly used for farmland irrigation and plateau mountainous area's water for people and livestock, also can supply city, factory, railway, mine, construction site for drainage use. Its structure is composed of driving shaft, multiple pump core and other components. The pump core quantity is different, can be used for different head and flow requirement.

[0003] At present, in the prior art, the long pump cover is generally assembled with multiple shafts, and the design of the long pump cover with multiple shafts is often limited by the structure, and the compression force is ensured by locking only at the top when multiple pump parts are assembled. When the number of pump parts is large, the compression force of the upper and lower pump parts of the pump head is uneven, and the assembly is relatively complex, which is not conducive to large-scale production and assembly. Therefore, whether a new structure can be designed to solve these problems is very important for the production of well submersible electric pumps. CONTENT OF THE UTILITY MODEL

[0004] The utility model overcomes the above-mentioned defects, when assembling from bottom to top, each pump cover and the pump part of each shaft are assembled and locked respectively to ensure the compression force, and the adjacent two pump covers are connected with the intermediate bearing body and assembled by pin fixing. The compression force of the pump part in each pump cover is determined respectively, the compression force of the pump part in each pump cover can be evenly distributed, the problem of uneven compression force is solved, the pressure difference in the single pump cavity is effectively reduced, and the design of the pin structure makes the assembly process simple and convenient. Compared with the assembly mode of the long pump cover cooperating with multiple shafts, the utility model has great advantages and is conducive to the design and promotion of large-scale production lines.

[0005] The pump cover connection structure of the utility model well submersible electric pump is briefly described as follows:

[0006] The pump cover connection structure of the utility model well submersible electric pump is characterized by comprising an upper pump cover, a lower pump cover, a bearing body component and a connecting piece, wherein the upper pump cover and the lower pump cover are respectively sleeved on the upper part and the lower part of the bearing body component, the upper part and the lower part of the bearing body component are respectively provided with a threaded hole, the upper pump cover is provided with a through hole I at the position corresponding to the threaded hole of the bearing body component, the lower pump cover is provided with a through hole II at the position corresponding to the threaded hole of the bearing body component, and the connecting piece is two screws which are respectively threaded into the through hole I and the through hole II and the threaded hole of the bearing body component.

[0007] Further, the screw hole is a T-shaped cross-section screw hole, and a pin is inserted into the upper portion of the T-shaped screw hole.

[0008] Further, two annular grooves are formed in the bearing body component, and an O-shaped rubber ring is sleeved in the annular grooves.

[0009] Further, the O-shaped rubber ring is made of butyl rubber.

[0010] The utility model discloses a pump cover connecting structure of well submersible electric pump, has reasonable in design, simple structure, compression force is even, single section pump cavity pressure difference is small, and the characteristics such as simple assembly improve production efficiency, reduce manufacturing cost, make the structure longer electric pump can also obtain more excellent performance simultaneously, this is of great significance to the product obtains higher market competitiveness. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is pump cover connecting structure schematic diagram of well submersible electric pump;

[0012] Figure 2 It is bearing body component structure schematic diagram;

[0013] In the drawing: 1 is upper section pump cover, 2 lower section pump cover, 3 is bearing body component, 4 is pin, 5 is screw, 6 is O-shaped rubber ring, 7 is through hole I and 8 is through hole II. DETAILED DESCRIPTION

[0014] The technical scheme in the embodiments of the utility model will be apparently and completely described below in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of protection of the utility model.

[0015] Brief description of the pump cover connecting structure of well submersible electric pump of the utility model:

[0016] The utility model discloses a pump cover connecting structure of well submersible electric pump, including upper section pump cover 1, lower section pump cover 2, bearing body component 3 and connecting piece, upper section pump cover 1 and lower section pump cover 2 are respectively installed in the upper portion and lower portion of bearing body component 3, and the upper portion and lower portion of bearing body component 3 are each formed with a screw hole, upper section pump cover 1 is formed with through hole I 7 in the screw hole corresponding position of bearing body component 3, and lower section pump cover 2 is formed with through hole II 8 in the screw hole corresponding position of bearing body component 3, the connecting piece is two screws 5, and two screws 5 are respectively passed through through hole I and through hole II and are connected with the screw hole on bearing body component 3 by screwing. The screw hole is a T-shaped cross-section screw hole, and a pin is inserted into the upper portion of the T-shaped screw hole.

[0017] Two annular grooves are formed on the bearing body part 3, and an O-shaped rubber ring 6 is sleeved in the annular grooves.

[0018] When the pump parts are installed, the pump parts at the upper and lower ends bear the maximum compression force. Taking the combination of the 30-stage pump parts as an example, the compression force borne by the pump parts at the first and last stages is about 260kgf, and the corresponding compression amount is about 0.1, while the compression force borne by the pump parts in the middle part is the lowest, only about 130kgf, and the compression amount is about 0.05. In this way, there is a large difference in the compression force between the pump parts at the first and last stages and the pump parts in the middle part. However, when the multi-stage pump sleeves are connected through the bearing body, the situation is different. Taking two-stage pump sleeves as an example, although the compression force of the pump parts at the first and last stages in each pump sleeve remains unchanged, the number of the pump part combinations is reduced by half to 15 stages. In this way, the compression force borne by the pump parts in the middle part in each pump sleeve is about 190kgf, and the compression amount is about 0.08. In this way, the difference in the compression force and the difference in the compression amount between the pump parts at the first and last stages and the pump parts in the middle part are significantly reduced, which reduces the difference in the compression force in a single pump cavity and reduces the difference in the compression amount.

[0019] The pump sleeve connecting structure of the well submersible electric pump can make the longer pump head have better structural strength and better stability, solve the problems of uneven compression force and assembly difficulty in the traditional long pump sleeve and multi-stage shaft assembly mode, and effectively improve the production efficiency.

[0020] The advantages of the new structure multi-stage pump sleeve structure of the well submersible electric pump are as follows:

[0021] 1. Uniform compression force

[0022] 2. Small pressure difference in a single pump cavity

[0023] 3. Simple assembly.

Claims

1. A pump housing connection structure of a submersible electric pump for a well, comprising an upper section pump housing (1), a lower section pump housing (2), a bearing body member (3) and a connecting member, characterized in that: The upper section pump sleeve (1) and the lower section pump sleeve (2) are respectively sleeved on the upper and lower sections of the bearing body component (3), the upper and lower sections of the bearing body component (3) are respectively provided with a screw hole, the upper section pump sleeve (1) is provided with a through hole I (7) at the position corresponding to the screw hole of the bearing body component (3), the lower section pump sleeve (2) is provided with a through hole II (8) at the position corresponding to the screw hole of the bearing body component (3), the connecting piece is two screws (5), the two screws (5) are respectively screwed into the through hole I and the through hole II and the screw hole on the bearing body component (3).

2. The pump housing connection structure for a submersible electric pump for a well according to claim 1, characterized in that, The screw hole is a T-shaped screw hole in cross section, and a pin (4) is inserted into the upper section of the T-shaped screw hole.

3. The pump housing connection structure for a submersible electric pump for a well according to claim 1 or 2, characterized in that, The bearing body component (3) is provided with two annular grooves, and an O-shaped rubber ring (6) is sleeved in the annular grooves.

4. The pump housing connection structure for a submersible electric pump for a well according to claim 3, characterized in that, The O-shaped rubber ring (6) is made of butyl rubber.

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