CN215633828U - Non-shaft seal submerged pump - Google Patents
Non-shaft seal submerged pump Download PDFInfo
- Publication number
- CN215633828U CN215633828U CN202122055130.3U CN202122055130U CN215633828U CN 215633828 U CN215633828 U CN 215633828U CN 202122055130 U CN202122055130 U CN 202122055130U CN 215633828 U CN215633828 U CN 215633828U
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- pump
- shaft
- impeller
- polyvinylidene fluoride
- sealing ring
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Abstract
The utility model discloses a shaft seal-free submerged pump in the technical field of submerged pumps, which comprises a pump shell, a pump cover, an impeller, a shell, a pump shaft and a support, wherein the pump shaft is arranged on the support, the upper part of the pump shaft is connected with a motor, and the lower part of the pump shaft is connected with the pump body, and the shaft seal-free submerged pump is characterized in that: the pump shell and the pump cover are integrally formed by compression molding of polyvinylidene fluoride through a die at one time, and the impeller is of a steel-plastic composite structure and comprises an impeller steel framework and a polyvinylidene fluoride coating layer which is formed outside the steel framework by compression molding at one time; and a sealing ring is arranged at the joint of the pump cover and the pump shaft. The utility model has the characteristics of good corrosion resistance, long service life and the like.
Description
Technical Field
The utility model relates to a shaft seal-free submerged pump in the technical field of submerged pumps.
Background
The submerged pump is widely applied to material conveying in steel, petroleum, chemical engineering, papermaking, environmental protection, nonferrous metals, acid regeneration pits and tanks, and the submerged pump cannot be used for a long time due to corrosion on occasions of fluids with strong corrosivity and more impurities; when the submerged pump works, the rotating impeller works on liquid, so that the pressure of the liquid in the pump is higher than the ambient pressure outside the pump, the liquid in the pump leaks out of the pump from a gap between a pump body and a rotating shaft, in order to prevent or reduce the leakage, a common plastic submerged pump is generally provided with a shaft seal below the liquid level, the service life of the existing shaft seal (such as a mechanical shaft seal or a packing shaft seal and the like) is short, particularly in the submerged pump for conveying corrosive liquid containing solid particles, the liquid can be condensed into solid, the conveyed shaft seal liquid contains the solid particles, and the abrasion of the packing is accelerated due to the increase of the content of the solid particles.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects of the existing submerged pump, thereby providing a shaft seal-free submerged pump which can be used in various severe environments, has high corrosion resistance and longer service life.
In order to achieve the purpose, the utility model adopts the technical scheme that:
the utility model provides a no shaft seal submerged pump, includes pump case, pump cover, impeller, shell, pump shaft and support, and the pump shaft is installed on the support, and the motor is connected on pump shaft upper portion, and the pump shaft sub-unit connection pump body, its characterized in that: the pump shell and the pump cover are integrally formed by compression molding of polyvinylidene fluoride through a die at one time, and the impeller is of a steel-plastic composite structure and comprises an impeller steel framework and a polyvinylidene fluoride coating layer which is formed outside the steel framework by compression molding at one time; a sealing ring is arranged at the joint of the pump cover and the pump shaft; the technical scheme is further explained as follows: the sealing ring is a labyrinth sealing structure and is formed by one-time pressing by adopting a polyvinylidene fluoride plastic mould; the technical scheme is further explained as follows: a plurality of parallel annular grooves are formed in the inner peripheral surface of the pump cover connected with the sealing ring, and the annular grooves are distributed at equal intervals along the axial direction of the pump shaft; the technical scheme is further explained as follows: the labyrinth seal structure is characterized in that a honeycomb cavity is arranged in the seal ring; the technical scheme is further explained as follows: the average thickness of the whole fluoroplastics of the pump shell and the pump cover is more than 20 mm; the technical scheme is further explained as follows: the thickness of the polyvinylidene fluoride coating layer of the impeller is more than 20 mm.
The utility model has the characteristics of good corrosion resistance, long service life and the like.
Drawings
FIG. 1 is a view of the structure of a shaft seal-free submerged pump;
fig. 2 is a schematic view of a labyrinth seal structure.
In the figure: pump case 1, impeller 2, pump cover 3, sealing ring 4, pump shaft 5 and support 6.
Detailed Description
In order to make the technical scheme and the beneficial effects of the utility model more clear and more obvious, the utility model is further described below with reference to the accompanying drawings;
the pump body is of an all-plastic structure, the pump body and the pump cover are integrally formed by compression molding of polyvinylidene fluoride through a die at one time, the impeller is of a steel-plastic composite structure, the impeller is made of a steel framework and a polyvinylidene fluoride coating layer which is formed by compression molding of a polyvinylidene fluoride die at one time, the pump body and the pump cover are formed by compression molding of a polyvinylidene fluoride die at one time, the average thickness is not less than 20mm, the outline of the steel framework of the impeller is smaller than that of the impeller, the polyvinylidene fluoride is molded at one time outside the steel framework, and the average thickness of the polyvinylidene fluoride coating layer of the impeller is not less than 20 mm; the sealing ring of the labyrinth seal structure is arranged at the joint of the pump cover and the pump shaft, the sealing ring is formed by one-time pressing through a mould made of polyvinylidene fluoride plastics, a honeycomb cavity is arranged in the sealing ring of the labyrinth seal structure to enable the sealing ring to have certain elasticity, a plurality of parallel annular grooves are arranged on the inner circumferential surface of the pump cover connected with the sealing ring, and the annular grooves are distributed at equal intervals along the axial direction of the pump shaft; the special seal ring structure without the shaft seal has good corrosion resistance, can overcome the defect that a common plastic submerged pump is easy to block, and prolongs the service life.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides a no shaft seal submerged pump, includes pump case, pump cover, impeller, shell, pump shaft and support, and the pump shaft is installed on the support, and the motor is connected on pump shaft upper portion, and the pump shaft sub-unit connection pump body, its characterized in that: the pump shell and the pump cover are integrally formed by compression molding of polyvinylidene fluoride through a die at one time, and the impeller is of a steel-plastic composite structure and comprises an impeller steel framework and a polyvinylidene fluoride coating layer which is formed outside the steel framework by compression molding at one time; and a sealing ring is arranged at the joint of the pump cover and the pump shaft.
2. The shaftless submersible pump according to claim 1, wherein: the sealing ring is of a labyrinth seal structure and is formed by one-time pressing of a polyvinylidene fluoride plastic mould.
3. The shaftless submersible pump according to claim 1, wherein: the pump cover is provided with a plurality of parallel annular grooves on the inner circumferential surface connected with the sealing ring, and the annular grooves are distributed at equal intervals along the axial direction of the pump shaft.
4. The shaftless submersible pump according to claim 2, wherein: the labyrinth seal structure is provided with a honeycomb cavity in the sealing ring.
5. The shaftless submersible pump according to claim 1, wherein: the average thickness of the whole fluoroplastics of the pump shell and the pump cover is more than 20 mm.
6. The shaftless submersible pump according to claim 1, wherein: the thickness of the polyvinylidene fluoride coating layer of the impeller is more than 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122055130.3U CN215633828U (en) | 2021-08-30 | 2021-08-30 | Non-shaft seal submerged pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122055130.3U CN215633828U (en) | 2021-08-30 | 2021-08-30 | Non-shaft seal submerged pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215633828U true CN215633828U (en) | 2022-01-25 |
Family
ID=79903532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122055130.3U Active CN215633828U (en) | 2021-08-30 | 2021-08-30 | Non-shaft seal submerged pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215633828U (en) |
-
2021
- 2021-08-30 CN CN202122055130.3U patent/CN215633828U/en active Active
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