CN110056533B - Chemical pump impeller locking device - Google Patents
Chemical pump impeller locking device Download PDFInfo
- Publication number
- CN110056533B CN110056533B CN201910423371.3A CN201910423371A CN110056533B CN 110056533 B CN110056533 B CN 110056533B CN 201910423371 A CN201910423371 A CN 201910423371A CN 110056533 B CN110056533 B CN 110056533B
- Authority
- CN
- China
- Prior art keywords
- impeller
- nut
- sealing gasket
- sealed pad
- wall
- Prior art date
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- 239000000126 substance Substances 0.000 title claims abstract description 31
- 238000007789 sealing Methods 0.000 claims abstract description 60
- 238000001125 extrusion Methods 0.000 claims abstract description 14
- 229920002313 fluoropolymer Polymers 0.000 claims abstract description 14
- 230000001965 increasing effect Effects 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000008602 contraction Effects 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 238000003825 pressing Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/20—Mounting rotors on shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2/00—Friction-grip releasable fastenings
- F16B2/005—Means to increase the friction-coefficient
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/008—Corrosion preventing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
- F16B43/001—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts for sealing or insulation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a chemical pump impeller locking device which comprises a sealing gasket (1), an impeller nut (2) and a locking nut (3), wherein the inner side of the impeller nut (2) is sleeved with the sealing gasket (1) and is in extrusion fit with the upper part of the sealing gasket (1), the lower part of the sealing gasket (1) is tightly pressed against the upper end of an impeller assembly (4), the locking nut (3) is tightly fit with the inner side of the sealing gasket (1) and is used for fastening the impeller nut (2), the impeller assembly (4) and the output end of a pump shaft, the head part of the impeller nut (2) is a fluoroplastic layer for preventing medium corrosion, and the top surface of the sealing gasket (1) is inclined relative to the inner surface of the sealing gasket for generating radial extrusion of the inner wall of the impeller nut (2) and the outer wall of the locking nut (3). The invention fully utilizes the static friction, dynamic friction, thermal expansion and cold contraction characteristics, thereby prolonging the service life of the pump, changing the traditional sealing thinking, solving the problem of impeller nut falling, greatly saving the production cost of users and improving the production efficiency.
Description
Technical Field
The invention relates to the technical field of chemical equipment, in particular to a chemical pump impeller locking device.
Background
The fluoroplastic chemical pump is a chemical pump for conveying corrosive medium, and has more outstanding effect especially in the working conditions of conveying strong acid, strong alkali, inflammable and explosive medium. Because the medium is special, so that the overflow part must be preserved, so that the impeller nut contacted with the medium must be made of fluoroplastic, so that when the pump is started or closed, the impeller nut is loosened due to inertia, and if the temperature of the medium is too low or too high, the sealing gasket is deformed due to expansion caused by heat and contraction caused by cold, so that the loosening and falling of the impeller nut are more easily aggravated. Therefore, users cannot normally produce the plastic composite material, and accessories are required to be replaced frequently, so that economic losses are caused.
The utility model provides a chemical pump impeller locking device of patent application number 201610369734.6, including the pump shaft and cup joint at epaxial impeller of pump, lock nut and the axle head threaded connection of pump shaft compress tightly the impeller, the axle head threaded connection of secondary lock nut and pump shaft compress tightly lock nut, lock nut compresses tightly the one end of impeller and sets up the shirt rim, along circumference evenly distributed there are 7 nut locating pin holes, evenly distributed 9 impeller locating pin holes on the circumference that the impeller terminal surface corresponds, one of lock nut locating pin holes aligns with one of impeller locating pin hole, and fix lock nut and impeller through the locating pin. The structure of this patent is complicated, uses too much nut subassembly, uses for a long time, still produces the loose potential safety hazard of nut subassembly or leakproofness problem easily when starting scram or acceleration.
Based on the above, there is an urgent need for a chemical pump impeller locking device that can solve the problem of impeller nut fall-off and increase the service life of fluoroplastic chemical pumps.
Disclosure of Invention
The invention aims to solve the technical problem of providing the chemical pump impeller locking device which can solve the problem of impeller nut falling and prolong the service life of a fluoroplastic chemical pump.
The invention adopts the following technical scheme to solve the technical problems:
the utility model provides a chemical pump impeller locking device, includes sealed pad, impeller nut, lock nut, the inboard sealed pad that cup joints of impeller nut and with sealed pad upper portion extrusion laminating, sealed pad's lower part compresses tightly impeller subassembly upper end, lock nut and sealed pad inboard closely paste and fasten the output of impeller nut, impeller subassembly and pump shaft, impeller nut's head is the fluoroplastic layer and is used for preventing the medium corruption, sealed pad's top surface is the slope form rather than the inner face for produce radial extrusion impeller nut inner wall and lock nut outer wall, increase the frictional force between sealed pad and impeller nut inner wall and the lock nut outer wall.
As one preferable mode of the invention, a friction layer is further arranged on the inner wall of the impeller nut, so that the friction force between the sealing gasket and the inner wall of the impeller nut is further increased, and the impeller nut is prevented from falling off.
As one of preferable modes of the present invention, the thickness of the friction layer is 0.2 to 0.5mm.
As a preferred embodiment of the present invention, the inclination of the top surface of the gasket with respect to the inner surface thereof is 1 to 3 °.
As a preferred embodiment of the present invention, the inclination of the top surface of the gasket with respect to the inner surface thereof is 2 °.
As one of the preferred modes of the invention, the lock nut is fastened to the impeller nut by a screw connection and the friction force is increased by pressing the gasket, and the fastening direction of the lock nut is opposite to the rotation direction of the impeller.
As one of preferable modes of the invention, the joint part of the lower part of the sealing gasket and the upper end of the impeller assembly is respectively provided with a first friction ring and a corresponding matched first friction groove, and the extrusion joint part of the upper part of the sealing gasket and the inner side of the impeller nut is respectively provided with a second friction ring and a corresponding matched second friction groove.
As one of the preferable modes of the invention, the sealing gasket is in a hat shape, a through hole matched with the tail part of the impeller nut is formed in the middle of the sealing gasket, the height of the top of the sealing gasket is matched with the depth of the inner wall of the impeller nut, and the depth of the inner side of the sealing gasket is larger than the thickness of the edge of the sealing gasket.
As one of preferable modes of the invention, the through hole is a regular hexagonal through hole, one end of the tail part of the impeller nut close to the head part is matched and positioned, and the rear end of the impeller nut is in a threaded shape.
The invention also discloses a chemical pump impeller locking device, which comprises a sealing gasket, an impeller nut and a locking nut, wherein the inner side of the impeller nut is sleeved with the sealing gasket and is in extrusion fit with the upper part of the sealing gasket, the lower part of the sealing gasket is tightly pressed against the upper end of the impeller assembly, the locking nut is tightly fit with the inner side of the sealing gasket and is used for fastening the impeller nut, the impeller assembly and the output end of a pump shaft, the head part of the impeller nut is a fluoroplastic layer for preventing medium corrosion, the top surface of the sealing gasket is in a relatively convex shape relative to the center, or the inner surface of the sealing gasket is in a relatively convex shape relative to the center, and the locking nut is used for generating radial extrusion of the inner wall of the impeller nut and the outer wall of the locking nut.
Compared with the prior art, the invention has the advantages that: the invention fully utilizes the static friction, dynamic friction, thermal expansion and cold contraction characteristics, thereby prolonging the service life of the pump, changing the traditional sealing thinking, solving the problem of impeller nut falling, greatly saving the production cost of users and improving the production efficiency.
Drawings
FIG. 1 is a schematic view of the overall structure of the chemical pump of the present embodiment;
FIG. 2 is an enlarged schematic view of a part of the chemical pump impeller locking apparatus of the present embodiment in a chemical pump;
FIG. 3 is a schematic structural view of the gasket of the present embodiment 1-4;
FIG. 4 is a top view of the gasket of the present embodiments 1-4;
FIG. 5 is a schematic view of the impeller nut structure of the present embodiment;
fig. 6 is a schematic structural view of the gasket of example 5.
Detailed Description
The following describes in detail the examples of the present invention, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of protection of the present invention is not limited to the following examples.
Example 1
As shown in fig. 1-5, the locking device for the impeller of the chemical pump in this embodiment includes a gasket 1, an impeller nut 2 and a lock nut 3, where the inner side of the impeller nut 2 is sleeved with the gasket 1 and is pressed against the upper portion of the gasket 1, the lower portion of the gasket 1 compresses the upper end of the impeller component 4, the lock nut 3 is tightly pressed against the inner side of the gasket 1 and fastens the impeller nut 2, the impeller component 4 and the output end of the pump shaft, the head of the impeller nut 2 is a fluoroplastic layer for preventing corrosion of the medium, the top of the gasket 1 is provided with a certain oblique angle for generating a friction force for radially pressing the inner wall of the impeller nut 2 and the outer wall of the lock nut 3, increasing the friction force between the gasket and the inner wall of the impeller nut and the outer wall of the lock nut, and greatly enhancing the rotational friction force between them when the fluoroplastic chemical pump is started and shut down, the possibility of the impeller nut is reduced in the stress, the fastening effect is achieved, and when the conveyed low-temperature medium is shrunk and tightly wrapped around the lock nut. When high-temperature medium is conveyed, the sealing gasket expands and clings to the inner wall of the impeller nut, so that the fastening function is realized.
Example 2
The embodiment is basically the same as embodiment 1, and is mainly different in that a friction layer 201 is further provided on the inner wall of the impeller nut 2, so that the friction force between the sealing pad and the inner wall of the impeller nut is further increased, and the impeller nut is prevented from falling off, the thickness of the friction layer 201 is 0.2-0.5mm, the certain oblique angle is 1-3 degrees, and the fastening effect is optimal when the certain oblique angle is preferably 2 degrees.
Example 3
The embodiment is basically the same as embodiment 1, and is mainly different in that the lock nut 3 is fastened on the impeller nut 2 through threaded connection and improves the friction force by pressing the sealing gasket 1, the fastening direction of the lock nut 3 is opposite to the rotation direction of the impeller, the joint part of the lower part of the sealing gasket 1 and the upper end of the impeller assembly 4 is respectively provided with a first friction ring 101 and a corresponding matched first friction groove 401, and the extrusion joint part of the upper part of the sealing gasket 1 and the inner side of the impeller nut 2 is respectively provided with a second friction ring 102 and a corresponding matched second friction groove 202.
Example 4
The embodiment is basically the same as the embodiment 1, and is mainly different in that the sealing gasket 1 is in a hat shape, a through hole matched with the tail part of the impeller nut 2 is formed in the middle of the sealing gasket 1, the height of the top of the sealing gasket 1 is matched with the depth of the inner wall of the impeller nut 2, the depth of the inner side of the cap of the sealing gasket 1 is larger than the thickness of the cap edge of the sealing gasket 1, the shape of the through hole is a regular hexagonal through hole, one end, close to the head, of the tail part of the impeller nut 2 is matched with the matched outer hexagonal through hole, and the rear end of the tail part of the impeller nut 2 is in a thread shape; the sealing gasket shape structure of the embodiment can wrap the lock nut and can be attached to the inner wall of the impeller nut, so that the sealing performance between the lock nut and the impeller nut is greatly enhanced, the regular hexagonal through holes are positioned to prevent relative rotation of the regular hexagonal through holes, and the anti-falling effect is further enhanced.
Example 5
See fig. 1-2, fig. 6: the invention also discloses a chemical pump impeller locking device, which comprises a sealing gasket 1, an impeller nut 2 and a locking nut 3, wherein the inner side of the impeller nut 2 is sleeved with the sealing gasket 1 and is in extrusion fit with the upper part of the sealing gasket 1, the lower part of the sealing gasket 1 is tightly pressed against the upper end of an impeller assembly 4, the locking nut 3 is tightly fit with the inner side of the sealing gasket 1 and is used for fastening the impeller nut 2, the impeller assembly 4 and the output end of a pump shaft, the head part of the impeller nut 2 is a fluoroplastic layer for preventing medium corrosion, the top surface of the sealing gasket 1 is in a relatively convex shape relative to the center and/or the inner surface of the sealing gasket 1 is in a relatively convex shape relative to the center, so that friction force between the sealing gasket and the impeller nut inner wall and the locking nut outer wall is increased by radial extrusion, the top surface or the inner surface of the sealing gasket in the embodiment is in a convex shape, the rotating friction force between the impeller nut inner wall and the locking nut outer wall is greatly enhanced when the fluoroplastic chemical pump is started and shut down, the possibility that the impeller nut is loose due to inertia force is greatly reduced when the fluoroplastic chemical pump is started and shut down, the sealing gasket is tightly packed up, and contracted when the sealing gasket is tightly packed. When high-temperature medium is conveyed, the sealing gasket expands and clings to the inner wall of the impeller nut, so that the fastening function is realized.
The invention has the beneficial effects and the working principle that: the improved impeller nut and the sealing gasket have simple structure and convenient installation, the anti-falling effect of the impeller nut is excellent, the improved sealing gasket is tightly matched with the inner wall of the improved impeller nut, the inner wall of the impeller nut is processed with a 0.2-0.5mm deep friction layer, when the impeller is locked by the locking nut, the impeller nut is fastened on a pump shaft (the improved sealing gasket is placed in the impeller nut), and the sealing gasket is provided with a slope of 2 degrees or the top surface and/or the inner surface of the sealing gasket are convex and fastened to the end, so that the reaction force of the sealing gasket is increased, the friction resistance is greatly enhanced by the friction layer on the inner wall of the impeller nut and the outer wall of the locking nut, and the fastening effect is rapidly improved. When the fluoroplastic chemical pump is started and shut down, the possibility that the impeller nut and the lock nut are loosened by inertia force is greatly reduced, and the fastening function is achieved. When the low-temperature medium is conveyed, the sealing gasket is contracted and tightly wrapped on the lock nut. When high-temperature medium is conveyed, the sealing gasket expands to be clung to the inner wall of the impeller nut, and the friction groove is used for fastening.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. The utility model provides a chemical pump impeller locking device which is characterized in that, including sealed pad (1), impeller nut (2), lock nut (3), sealed pad (1) is cup jointed to impeller nut (2) inboard and with sealed pad (1) upper portion extrusion laminating, sealed pad (1) lower part compresses tightly impeller subassembly (4) upper end, lock nut (3) closely laminate with sealed pad (1) inboard, impeller nut (2) fastening lock nut (3), impeller subassembly (4) and the output of pump shaft; the head of impeller nut (2) is fluoroplastic layer and is used for preventing the medium from corroding, the top surface of sealed pad (1) is the slope form rather than the inner face for produce radial extrusion impeller nut (2) inner wall and lock nut (3) outer wall, the slope of the top surface of sealed pad (1) rather than the inner face is 1-3, sealed pad (1) is the afterbody matched with through-hole of impeller nut (2) has been seted up in the middle of "cap form", the crown height of sealed pad (1) and the inner wall degree of depth assorted of impeller nut (2), and the inboard degree of depth of cap of sealed pad (1) is greater than the brim of a hat thickness of sealed pad (1).
2. The impeller locking device of the chemical pump according to claim 1, characterized in that a friction layer (201) is further arranged on the inner wall of the impeller nut (2).
3. The chemical pump impeller locking apparatus according to claim 2, characterized in that the thickness of the friction layer (201) is 0.2-0.5mm.
4. Chemical pump impeller locking device according to claim 1, characterized in that the inclination of the top surface of the gasket (1) with respect to its inner face is 2 °.
5. The impeller locking device of the chemical pump according to claim 1, characterized in that the impeller nut (2) is fastened to the lock nut (3) by a threaded connection and the friction is increased by compressing the gasket (1), the fastening direction of the lock nut (3) being opposite to the rotation direction of the impeller.
6. The chemical pump impeller locking device according to claim 1, wherein the joint part of the lower part of the sealing gasket (1) and the upper end of the impeller assembly (4) is respectively provided with a first friction ring (101) and a corresponding matched first friction groove (401), and the extrusion joint part of the upper part of the sealing gasket (1) and the inner side of the impeller nut (2) is respectively provided with a second friction ring (102) and a corresponding matched second friction groove (202).
7. The impeller locking device of the chemical pump according to claim 1, wherein the through hole is a regular hexagonal through hole, one end of the tail part of the impeller nut (2) close to the head part is matched and positioned, and the rear end is in a threaded shape.
8. The impeller locking device of the chemical pump according to claim 1, characterized in that the inner surface of the sealing gasket (1) is relatively convex relative to the center and is used for generating radial extrusion of the inner wall of the impeller nut (2) and the outer wall of the locking nut (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910423371.3A CN110056533B (en) | 2019-05-21 | 2019-05-21 | Chemical pump impeller locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910423371.3A CN110056533B (en) | 2019-05-21 | 2019-05-21 | Chemical pump impeller locking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110056533A CN110056533A (en) | 2019-07-26 |
| CN110056533B true CN110056533B (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910423371.3A Active CN110056533B (en) | 2019-05-21 | 2019-05-21 | Chemical pump impeller locking device |
Country Status (1)
| Country | Link |
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| CN (1) | CN110056533B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486320A (en) * | 2019-08-15 | 2019-11-22 | 深圳市捷晶能源科技有限公司 | A kind of impeller fastener and conveying device, supercharging device |
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