A pump shaft for a submersible electric pump

Abstract

The utility model relates to the technical field of submersible electric pump and discloses a pump shaft for submersible electric pump, including pump shaft, the outer surface of one end of pump shaft is provided with mounting groove, the inner wall of mounting groove is provided with the positioning slot symmetry, the one end of pump shaft is provided with screw thread connection groove, the inside of mounting groove is inserted with limit component, the inside screw thread connection of screw thread connection groove has locking assembly, and one end of locking assembly and limit component abuts. The utility model discloses when the limit slot is worn and damaged, the interior hexagon bolt is detached from the inside of screw thread connection groove, can remove the limit of limit component, then pulls out the mounting block and can complete the disassembly of limit component, installs the new limit component into, can complete the replacement of limit slot, avoids the limit slot to set up on the pump shaft body, leads to the limit slot wear and damage and needs to replace the whole pump shaft condition, thereby reaches the effect of reducing the use cost.

Description

Technical Field

[0001] This utility model relates to the field of submersible electric pump technology, specifically a pump shaft for a submersible electric pump. Background Technology

[0002] An electric submersible pump (ESP) is a type of artificial lift device widely used in the petroleum industry. It is mainly used to efficiently extract crude oil from oil wells. Its core feature is that a multi-stage centrifugal pump and an electric motor are directly submerged below the well fluid. It is suitable for medium- to high-yield, deep wells or oil wells with high water cut.

[0003] The limiting groove at the connection end of a traditional submersible electric pump shaft is usually integrated with the pump shaft. When the limiting groove at the connection end wears out or is damaged, the entire pump shaft needs to be replaced to continue normal use, which leads to relatively high operating costs. Utility Model Content

[0004] The purpose of this utility model is to provide a pump shaft for a submersible electric pump, which solves the problem that the limiting groove at the connection end of the traditional submersible electric pump shaft is usually integrated with the pump shaft. When the limiting groove at the connection end is worn or damaged, the entire pump shaft needs to be replaced to continue normal use, which leads to relatively high operating costs.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a pump shaft for a submersible electric pump, comprising a pump shaft, an installation groove on the outer surface of one end of the pump shaft, positioning grooves symmetrically formed on the inner wall of the installation groove, a threaded connection groove on one end of the pump shaft, a limit component inserted into the installation groove, and a locking component threadedly connected to the inside of the threaded connection groove, with one end of the locking component and the limit component abutting against each other.

[0006] Furthermore, the limiting component includes a mounting block that is inserted into the interior of the mounting slot.

[0007] Furthermore, positioning blocks are fixedly installed on both sides of the mounting block, and the positioning blocks are inserted into the positioning grooves.

[0008] Furthermore, a limiting groove is formed on the outer surface of the mounting block.

[0009] Furthermore, the locking assembly includes an internal hexagon bolt, which is threaded into the inside of a threaded groove, and the internal hexagon bolt abuts against one end of the mounting block.

[0010] Furthermore, the internal hexagonal bolt has an oil inlet and several oil outlets, all of which are connected to the oil inlet and extend to the outer surface of the threaded groove of the internal hexagonal bolt.

[0011] This utility model has the following beneficial effects: (1) In this utility model, the mounting block and the positioning block are aligned with the inside of the mounting groove and the positioning groove respectively. The mounting block and the positioning block are inserted into the inside of the mounting groove and the positioning groove. Then, the internal hex bolt is threaded into the threaded connection groove at one end of the pump shaft. When the internal hex bolt is tightened, one end of the internal hex bolt and one end of the mounting block abut against each other, so that the mounting block can be installed inside the pump shaft. Then, the external connector is connected to one end of the pump shaft. The protrusion of the connector is installed into the inside of the limiting groove. When the limiting groove is worn and damaged, the internal hex bolt is removed from the inside of the threaded connection groove to release the limiting component. Then, the mounting block is pulled out to complete the disassembly of the limiting component. The new limiting component is installed to complete the replacement of the limiting groove. This avoids the situation where the limiting groove is opened on the pump shaft body, which would cause the limiting groove to wear and damage and require the replacement of the entire pump shaft, thereby achieving the effect of reducing the cost of use.

[0012] (2) This utility model injects lubricating oil into the interior of the internal hexagonal bolt through the oil injection port. The lubricating oil flows into the thread groove of the internal hexagonal bolt through multiple oil outlets, which can achieve the function of lubricating the connection between the internal hexagonal bolt and the threaded connection groove, and prevent the internal rust from causing the situation that is difficult to disassemble.

[0013] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the overall structure of this utility model disassembled; Figure 3 This is a schematic diagram of the locking assembly structure of this utility model; Figure 4 This utility model Figure 2 Enlarged schematic diagram of structure A in the image; The attached diagram lists the components represented by each number as follows: In the diagram: 1. Pump shaft; 101. Mounting groove; 102. Positioning groove; 103. Threaded connection groove; 2. Limiting assembly; 201. Mounting block; 202. Positioning block; 203. Limiting groove; 3. Locking assembly; 301. Socket head cap screw; 302. Oil inlet; 303. Oil outlet. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-4 As shown, this utility model is a pump shaft for a submersible electric pump, including a pump shaft 1. An installation groove 101 is provided on the outer surface of one end of the pump shaft 1. A positioning groove 102 is symmetrically provided on the inner wall of the installation groove 101. A threaded connection groove 103 is provided on one end of the pump shaft 1. A limit component 2 is inserted into the installation groove 101. A locking component 3 is threadedly connected to the inside of the threaded connection groove 103. One end of the locking component 3 and the limit component 2 abut against each other. The limiting component 2 includes a mounting block 201, which is inserted into the inside of the mounting slot 101; Positioning blocks 202 are fixedly installed on both sides of the mounting block 201, and the positioning blocks 202 are inserted into the positioning grooves 102. A limiting groove 203 is provided on the outer surface of the mounting block 201; Locking assembly 3 includes an internal hex bolt 301, which is threaded into the inside of the threaded connection groove 103, and abuts against one end of the mounting block 201; Align the mounting block 201 and positioning block 202 with the interiors of the mounting groove 101 and positioning groove 102 respectively, and insert the mounting block 201 and positioning block 202 into the interiors of the mounting groove 101 and positioning groove 102. Then, thread the hex socket bolt 301 into the threaded connection groove 103 at one end of the pump shaft 1. When tightening the hex socket bolt 301, one end of the hex socket bolt 301 abuts against one end of the mounting block 201, thus installing the mounting block 201 inside the pump shaft 1. Then, connect the external connector to one end of the pump shaft 1. The protrusion of the component can be installed into the inside of the limiting groove 203. When the limiting groove 203 is worn and damaged, the internal hex bolt 301 can be removed from the inside of the threaded connection groove 103 to release the limiting component 2. Then, the mounting block 201 can be pulled out to complete the disassembly of the limiting component 2. The new limiting component 2 can be installed to complete the replacement of the limiting groove 203. This avoids the situation where the limiting groove 203 is opened on the pump shaft 1 body, which would cause the limiting groove 203 to wear and damage and require the replacement of the entire pump shaft 1, thereby achieving the effect of reducing the use cost.

[0018] The internal hex bolt 301 has an oil filling port 302 inside and several oil outlets 303 inside. All oil outlets 303 are connected to the oil filling port 302 and all oil outlets 303 penetrate to the outer surface of the thread groove of the internal hex bolt 301. Lubricating oil is injected into the interior of the internal hex bolt 301 through the oil inlet 302. The lubricating oil flows into the thread groove of the internal hex bolt 301 through multiple oil outlets 303, which can achieve the function of lubricating the connection between the internal hex bolt 301 and the threaded connection groove 103, preventing the interior from rusting and making it difficult to disassemble.

[0019] In use, first align the mounting block 201 and positioning block 202 with the interiors of the mounting groove 101 and positioning groove 102 respectively, and insert the mounting block 201 and positioning block 202 into the interiors of the mounting groove 101 and positioning groove 102. Then, thread the hex socket head cap screw 301 into the threaded connection groove 103 at one end of the pump shaft 1. When tightening the hex socket head cap screw 301, one end of the hex socket head cap screw 301 abuts against one end of the mounting block 201, thus installing the mounting block 201 inside the pump shaft 1. Finally, connect the external connector to one end of the pump shaft 1. Simply install the protrusion of the connector into the inside of the limiting groove 203. When the limiting groove 203 is worn or damaged, remove the internal hex bolt 301 from the inside of the threaded connection groove 103 to release the limiting component 2. Then, pull out the mounting block 201 to complete the disassembly of the limiting component 2. Install the new limiting component 2 to complete the replacement of the limiting groove 203. This avoids the situation where the limiting groove 203 is opened on the pump shaft 1 body, which would cause the limiting groove 203 to wear and damage and require the replacement of the entire pump shaft 1, thereby reducing the cost of use.

[0020] Lubricating oil is injected into the interior of the internal hex bolt 301 through the oil inlet 302. The lubricating oil flows into the thread groove of the internal hex bolt 301 through multiple oil outlets 303, which can achieve the function of lubricating the connection between the internal hex bolt 301 and the threaded connection groove 103, preventing the interior from rusting and making it difficult to disassemble.

[0021] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A pump shaft for an electric submersible pump, comprising a pump shaft (1), characterized in that: The pump shaft (1) has an installation groove (101) on the outer surface of one end, and a positioning groove (102) is symmetrically provided on the inner wall of the installation groove (101). The pump shaft (1) has a threaded connection groove (103) at one end. A limit component (2) is inserted into the installation groove (101), and a locking component (3) is threaded into the threaded connection groove (103). One end of the locking component (3) and the limit component (2) abut against each other.

2. A pump shaft for use in a submersible electric pump according to claim 1, characterized in that: The limiting component (2) includes a mounting block (201) which is inserted into the interior of the mounting slot (101).

3. A pump shaft for use in a submersible electric pump according to claim 2, characterized in that: Positioning blocks (202) are fixedly installed on both sides of the mounting block (201), and the positioning blocks (202) are inserted into the positioning grooves (102).

4. The pump shaft for use in a submersible electric pump according to claim 2, characterized in that: The mounting block (201) has a limiting groove (203) on its outer surface.

5. The pump shaft for use in a submersible electric pump according to claim 1, characterized in that: The locking assembly (3) includes an internal hex bolt (301) which is threaded into the inside of the threaded connection groove (103) and abuts against one end of the mounting block (201).

6. A pump shaft for use in a submersible electric pump according to claim 5, characterized in that: The internal hex bolt (301) has an oil inlet (302) and several oil outlets (303) inside. The oil outlets (303) are all connected to the oil inlet (302) and all the oil outlets (303) extend to the outer surface of the thread groove of the internal hex bolt (301).

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