A high-lift submersible pump limiting structure for wells

Abstract

This utility model discloses a limiting structure for a high-lift submersible pump, including a pump body and a pump shaft. The top of the pump shaft is fitted with an inner ring of a volute casing. The bottom of the inner ring has a stepped surface. The inner ring mates with a top section volute casing, being inserted into the top section volute casing from the bottom of its inner wall in a stepped manner for secure installation. The inner wall of the top section volute casing presses against the stepped surface of the inner ring. A volute casing gasket is installed at the top of the inner ring. The inner ring of this utility model is integrally stretched and formed to ensure precision, manufacturing strength, and improved manufacturing efficiency, while reducing manufacturing costs. The volute casing gasket has increased top thickness for enhanced wear resistance. The enlarged vulcanized rubber area increases the contact area with the shaft, eliminating the need for additional processing of the pump shaft. The inner ring is installed from the bottom plate in a stepped manner, eliminating the need for welding and the risk of weld failure, thus effectively extending the pump body's service life.

Description

Technical Field

[0001] This utility model relates to the technical field of submersible pump structures for wells, and particularly to a high-lift submersible pump limiting structure for wells. Background Technology

[0002] In high-lift submersible pumps for wells, when the motor starts, the impeller drives the entire pump shaft to move upwards. For example... Figure 1 and Figure 2 As shown, the traditional high-lift submersible pump limiting structure includes a pump body 1 and a pump shaft 2. A steel sleeve 4 is fitted onto the end of the pump shaft. The traditional structure to prevent the impeller from moving upwards is a steel sleeve made from a section of steel pipe (high processing cost), which is installed from above the top section volute 3, then welded to the bottom and the inner wall of the top section volute, and finally pressed in a copper pipe and rubber assembly 6. Due to the impact of the impeller moving upwards, an impact force is generated between the steel sleeve and the top section volute, and the welded parts are prone to falling off and cracking; long-term operation makes it impossible to control the ideal operating height of the impeller; this leads to direct contact between the impeller and the top section volute, causing wear and other serious damage to the pump body structure, shortening the pump's service life; and this structure requires additional processing of the pump shaft head, increasing costs. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model designs a high-lift submersible pump limiting structure.

[0004] The present invention adopts the following technical solution: A high-lift submersible pump limiting structure includes a pump body and a pump shaft. The top of the pump shaft is fitted with an inner ring of a volute casing. The bottom of the inner ring of the volute casing has a stepped surface. The inner ring of the volute casing mates with a top section volute casing. The top section volute casing is inserted into the top section volute casing from the bottom of the inner wall of the top section volute casing in a stepped manner and is fastened. The inner wall of the top section volute casing is pressed against the stepped surface of the inner ring of the volute casing. A volute casing gasket is installed at the top of the inner ring of the volute casing.

[0005] Preferably, the volute gasket is welded to the top of the inner ring of the volute.

[0006] Preferably, a vulcanized rubber sleeve is installed on the inner wall of the inner ring of the volute, and the vulcanized rubber sleeve is sleeved with the pump shaft.

[0007] Preferably, the vulcanized rubber sleeve is a vulcanized wear-resistant rubber sleeve.

[0008] Preferably, the inner ring of the volute is integrally drawn from stainless steel.

[0009] The beneficial effects of this utility model are as follows: the inner ring of the volute casing is integrally stretched and formed to ensure accuracy, manufacturing strength, improve manufacturing efficiency, and reduce manufacturing costs; the volute casing gasket has increased top thickness, making it more effectively wear-resistant; the vulcanized rubber area is increased, increasing the contact area with the shaft, and the pump shaft does not require additional processing; the inner ring of the volute casing is installed from the bottom plate in a stepped snap-in manner, without welding, eliminating the risk of welding failure, thereby effectively extending the service life of the pump body. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a limiting structure for an existing high-lift submersible pump for wells. Figure 2 yes Figure 1 An enlarged view of point I in the middle; Figure 3 This is a schematic diagram of the structure of this utility model; Figure 4 Yes, yes Figure 3 An enlarged view of section II; In the diagram: 1. Pump body, 2. Pump shaft, 3. Top section volute, 4. Steel sleeve, 5. Impeller, 6. Copper pipe and rubber assembly, 7. Inner ring of volute, 8. Volute gasket, 9. Vulcanized rubber sleeve. Detailed Implementation

[0011] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Example: Figure 3 and Figure 4 As shown, a high-lift submersible pump limiting structure for wells includes a pump body 1 and a pump shaft 2. The top of the pump shaft is fitted with a volute inner ring 7. The bottom of the volute inner ring has a stepped surface. The volute inner ring mates with the top section volute 3. The top section volute 3 is inserted into the top section volute 3 from the bottom of the inner wall of the top section volute 3 and fastened. The inner wall of the top section volute 3 is pressed against the stepped surface of the volute inner ring. A volute gasket 8 is installed at the top of the inner ring of the volute 3.

[0012] The volute gasket is welded to the top of the inner ring of the volute. A vulcanized rubber sleeve 9 is installed on the inner wall of the inner ring of the volute, and the vulcanized rubber sleeve is sleeved with the pump shaft. The vulcanized rubber sleeve is a vulcanized wear-resistant rubber sleeve. The inner ring of the volute is made of stainless steel through integral stretching.

[0013] The inner ring of the volute casing of this utility model is integrally stretched and formed to ensure accuracy, manufacturing strength, improve manufacturing efficiency, and reduce manufacturing costs; the volute casing gasket has increased top thickness, making it more effectively wear-resistant; the vulcanized rubber area is increased, increasing the contact area with the shaft, and the pump shaft does not require additional processing; the inner ring of the volute casing is installed from the bottom plate in a stepped snap-in manner, without welding, eliminating the risk of welding failure, thereby effectively extending the service life of the pump body.

[0014] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A limiting structure for a high-lift submersible well pump, comprising a pump body and a pump shaft, characterized in that, The pump shaft is fitted with the inner ring of the volute casing at the top. The bottom of the inner ring of the volute casing has a stepped surface. The inner ring of the volute casing mates with the top section volute casing. The top section volute casing is inserted into the top section volute casing from the bottom of the inner wall of the top section volute casing and is fastened. The inner wall of the top section volute casing is pressed against the stepped surface of the inner ring of the volute casing. A volute casing gasket is installed at the top of the inner ring of the volute casing.

2. The high-lift submersible pump limiting structure for wells according to claim 1, characterized in that, The volute gasket is welded to the top of the inner ring of the volute.

3. The high-lift submersible pump limiting structure for wells according to claim 1, characterized in that, A vulcanized rubber sleeve is installed on the inner wall of the inner ring of the vortex casing, and the vulcanized rubber sleeve is sleeved with the pump shaft.

4. The high-lift submersible pump limiting structure for wells according to claim 3, characterized in that, The vulcanized rubber sleeve is a vulcanized wear-resistant rubber sleeve.

5. The high-lift submersible pump limiting structure for wells according to claim 1, characterized in that, The inner ring of the vortex casing is integrally stretched from stainless steel.

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