CN213235466U - Anticorrosive magnetic drive centrifugal pump - Google Patents
Anticorrosive magnetic drive centrifugal pump Download PDFInfo
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- CN213235466U CN213235466U CN202021745833.8U CN202021745833U CN213235466U CN 213235466 U CN213235466 U CN 213235466U CN 202021745833 U CN202021745833 U CN 202021745833U CN 213235466 U CN213235466 U CN 213235466U
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Abstract
An anticorrosion magnetic force driven centrifugal pump comprises a pump shell, a pump cover, an isolation sleeve, an outer magnetic steel rotor and a motor, wherein the pump shell, the pump cover and the isolation sleeve form a sealing cavity, an impeller, a main shaft and an inner magnetic steel rotor are arranged in the sealing cavity, and two ends and the whole body of the main shaft are hermetically inserted in the sealing sleeve formed by combining the impeller, a shaft sleeve and the inner magnetic steel rotor. The corrosion resistance of the magnetic drive centrifugal pump can be improved, the manufacturing cost is reduced, and the large-scale magnetic pump can convey the medium containing the chloride ions and the fluoride ions in the phosphorus compound fertilizer industry.
Description
Technical Field
The utility model relates to a magnetic drive centrifugal pump preparation field especially relates to anticorrosive centrifugal pump of plastics.
Background
The magnetic driving centrifugal pump with plastic flow passage part is anticorrosive and has no need of rotating shaft sealing and no leakage during conveying medium. Therefore, the conveying device is widely applied to the fields of chemical engineering, environmental protection and the like and used for conveying corrosive media.
In order to prevent corrosion of the support shaft of the magnetic pump, it is common to form the impeller support shaft from a ceramic material such as silicon carbide or alumina. In this way, even if the pump is in operation, the bubbles in the transported medium are not eroded. However, the pump for the conveying post of large chemical devices such as phosphorus chemical engineering, coal chemical engineering, nonferrous smelting engineering and the like needs large flow and high lift, most of the allocated power is 45-200 kW, if the rotating shaft is made of ceramic materials, the rotating shaft cannot bear the torsion of the impeller for acting due to insufficient strength, and the mechanical strength of the impeller made of all plastic materials in the prior art cannot meet the requirement of torsion resistance. Therefore, the technical personnel in the industry think of using metal materials to process and manufacture the rotating shaft and the impeller, and meet the condition of high torsion resistance requirement of the main shaft of the large-size magnetic pump. However, the components in the solution delivered in smelting and phosphorus compound fertilizer engineering are complex, and contain strong corrosive elements such as fluorine, chlorine and the like, some engineering also contains bromine, the components have great corrosivity to metals, and most of the positions need to use 200m3A magnetic pump with a large flow rate of more than h. Therefore, the assembly such as a main shaft, an impeller, a pump body, an isolation sleeve and the like can be processed by the industry only by using Hastelloy, Monel and other materials, and the operation requirement of a post with strong corrosivity and large flow can be met. So that the cost of the product is greatly improved,if a magnetic pump made of such materials is imported from abroad, one magnetic pump needs hundreds of thousands of RMB. The industry has not yet presented a large-scale strong-corrosion-resistant magnetic-drive centrifugal pump which can meet the corrosion-resistant requirement, has large pump flow, large power of a configured motor and relatively low price, so that the industry still has room for improvement and innovation.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the aforesaid is not enough, provides an anticorrosive ability that can promote magnetic drive centrifugal pump, reduces manufacturing cost, makes large-scale magnetic drive pump can carry the anticorrosive magnetic drive centrifugal pump of the medium that contains chloride ion and fluoride ion of compound fertile trade of phosphorus.
For realizing the purpose of the utility model, the following technical proposal is provided: the anticorrosive magnetically driven centrifugal pump includes pump casing, pump cover, isolating sleeve, outer magnetic steel rotor and motor, and the pump casing, pump cover and isolating sleeve constitute one sealed cavity with impeller, main shaft and inner magnetic steel rotor inside.
Preferably, the inner magnetic steel rotor comprises an inner magnetic steel fixing sleeve, a plastic anticorrosive layer outside the inner magnetic steel fixing sleeve and inner magnetic steel coated in the plastic anticorrosive layer.
Preferably, the shaft sleeve is sleeved with at least one anti-abrasion supporting sleeve, and the anti-abrasion supporting sleeve is arranged between the pump cover and the shaft sleeve.
Preferably, the sleeve is sleeved with two thrust rings, one thrust ring is arranged on the rear side of the impeller, and the other thrust ring is arranged on the front side of the inner magnetic steel rotor.
As preferred, bury the metal built-in fitting in the impeller, seted up the shaft hole on the metal built-in fitting, processing has the internal thread in the shaft hole, processing has the external screw thread on the main shaft spindle nose, both screw threads connect soon, and the processing of the other spindle nose of main shaft has the external screw thread, exposes interior magnet steel rotor, overlaps in proper order and establishes the gasket, connects lock nut and anticorrosive nut soon, and anticorrosive nut includes plastics lid and inside metal built-in fitting, sets up on the metal built-in fitting and connects soon with the cooperation of the other spindle nose of main shaft threaded hole.
Preferably, a metal embedded part is embedded in the impeller, the metal embedded part and the main shaft are of an integral structure, an external thread is machined on the other shaft head of the main shaft, the inner magnetic steel rotor is exposed, the gasket, the locking nut and the anti-corrosion nut are sequentially sleeved, the anti-corrosion nut comprises a plastic cover body and an inner metal embedded part, and a threaded hole matched with the other shaft head of the main shaft and screwed is formed in the metal embedded part.
Preferably, a metal embedded part is embedded in the impeller, a through hole is formed in the metal embedded part, one shaft head of the main shaft penetrates through the through hole in the metal embedded part, the other shaft head of the main shaft penetrates out of the inner magnetic steel rotor, external threads are machined on the two shaft heads, the two shaft heads are sequentially sleeved with a gasket, a locking nut and an anti-corrosion nut, the anti-corrosion nut comprises a plastic cover body and an inner metal embedded part, and a threaded hole matched with the shaft head of the main shaft and screwed is formed in the metal embedded part.
Preferably, a metal embedded part is embedded in the impeller, a through hole is formed in the metal embedded part, a spindle head of the main spindle penetrates through the through hole in the metal embedded part, external threads are machined on the spindle head, the spindle head is sequentially sleeved with a gasket, a locking nut and an anti-corrosion nut are screwed, the anti-corrosion nut comprises a plastic cover body and an inner metal embedded part, a threaded hole matched with a spindle head of the main spindle in a screwing mode is formed in the metal embedded part, a circular boss is arranged at the other spindle head of the main spindle, a plastic layer is wrapped on the periphery of the boss, and a sealing gasket.
Preferably, a metal embedded part is embedded in the impeller, a taper hole matched with the spindle head is formed in the metal embedded part, a through hole is formed in the center of the spindle, a screw rod is inserted into the through hole in a penetrating mode, an external thread is machined at one end of the screw rod and connected with a countersunk screw hole formed in the metal embedded part in a rotating mode, an external thread is machined at the other end of the screw rod, a fastening nut is arranged for locking, the other spindle head of the spindle exposes out of the inner magnetic steel rotor, a gasket is sequentially sleeved, a locking nut and an anti-corrosion nut are connected in a rotating mode, the anti-corrosion nut comprises a plastic cover body and an inner metal embedded part.
Preferably, the inner magnetic steel fixing sleeve of the inner magnetic steel rotor is provided with a countersunk head screw hole, the anti-corrosion nut is screwed with the countersunk head screw hole, a spindle head at one end of the main shaft penetrates through the inner magnetic steel fixing sleeve, an external thread is processed on the spindle head, and the spindle head is screwed with the locking nut for fixing.
Preferably, the central hole of the inner magnetic steel fixing sleeve of the inner magnetic steel rotor is a countersunk hole, an internal thread is processed in the countersunk hole, and the shaft head is provided with an external thread which is screwed and fixed with the shaft head.
Preferably, the pump cover and the inner magnetic steel rotor are provided with backflow holes.
The utility model discloses beneficial effect:
1. the corrosion prevention level of the large-scale corrosion prevention magnetic centrifugal pump is improved, so that the large-scale corrosion prevention magnetic centrifugal pump can convey media containing chloride ions and fluoride ions.
2. The manufacturing cost of the large magnetic centrifugal pump is greatly reduced, the manufacturing cost is reduced by 3-4 times compared with the manufacturing cost of the similar metal magnetic centrifugal pump capable of conveying hydrochloric acids and hydrofluoric acids, the product price is reduced by 2-3 times, and the cost is saved for users.
3. The method provides a new scheme and a new idea for manufacturing the magnetic drive centrifugal pump at home and abroad, eliminates technical obstacles for manufacturing large-scale magnetic pumps by engineering plastics, lays foundation conditions for mass production of the magnetic drive centrifugal pump, creates precondition conditions for wide application of the magnetic pump in the industrial field, and facilitates prevention of environmental pollution caused by running, overflowing, dripping and leaking by wide application of the magnetic pump, thereby providing conditions for improving the environmental protection level of industrial enterprises in China.
Drawings
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is an enlarged partial schematic view of the impeller and rotor portion of FIG. 1;
FIG. 3 is a schematic structural view of example 2;
FIG. 4 is a schematic structural view of embodiment 3;
FIG. 5 is a schematic structural view of example 4;
FIG. 6 is a schematic structural view of example 5;
FIG. 7 is a schematic structural view of example 6;
FIG. 8 is a schematic structural view of example 7.
Detailed Description
Example 1: as shown in fig. 1 and 2, the anticorrosion magnetic force driven centrifugal pump comprises a pump shell 1, a pump cover 4, a connecting support 10, an isolation sleeve 7, an outer magnetic steel rotor 9 and a motor 11, wherein the pump shell 1, the pump cover 4 and the isolation sleeve 7 form a sealed cavity, an impeller 2, a main shaft 3 and an inner magnetic steel rotor 8 are installed in the sealed cavity, two ends and the whole body of the main shaft 3 are hermetically inserted into the sealed sleeve formed by combining the impeller 2, a shaft sleeve 5 and the inner magnetic steel rotor 8, and the inner magnetic steel rotor 8 comprises an inner magnetic steel fixing sleeve 8.3, a plastic anticorrosion layer 8.2 on the outer side of the inner magnetic steel fixing sleeve 8.3 and inner magnetic steel 8.1 coated in the plastic anticorrosion layer 8.2. Two anti-abrasion supporting sleeves 6 are sleeved on the shaft sleeve 5, and the anti-abrasion supporting sleeves 6 are arranged between the pump cover 4 and the shaft sleeve 5. Two thrust rings 14 are sleeved on the shaft sleeve 5, one thrust ring is arranged on the rear side of the impeller 2, and the other thrust ring is arranged on the front side of the inner magnetic steel rotor 8. The pump cover 4 and the inner magnetic steel rotor 8 are provided with a backflow hole 20. Bury metal built-in fitting 2.1 underground in the impeller 2, the shaft hole has been seted up on the metal built-in fitting 2.1, it has the internal thread to process in the shaft hole, it has the external screw thread to process on the 3 spindle nose of main shaft, both screw threads connect soon, 3 another spindle nose of main shaft processes has the external screw thread, expose interior magnet steel rotor 8, overlap in proper order and establish gasket 16, connect lock nut 12 and anticorrosive nut 13 soon, anticorrosive nut 13 includes plastics lid 13.2 and inside metal built-in fitting 13.1, set up on the metal built-in fitting 13.1 and connect soon with the screw hole of 3 another spindle nose cooperations of main shaft.
The implementation and manufacturing method and the process are as follows: and selecting 45# steel to process the main shaft 3 according to the drawing. The pump shell 1, the impeller 2 and the pump cover 4 are manufactured by selecting the plastic of the ultra-high molecular weight polyethylene and producing, molding and processing the steel lining ultra-high molecular weight polyethylene according to the conventional process, and the metal embedded part 2.1 in the impeller 2 is made of common carbon steel. The silicon carbide ceramic is selected as a manufacturing material of the shaft sleeve 5 and manufactured by professional outsourcing units. Samarium cobalt magnetic steel is selected, the size of a magnetic steel body is determined according to the shaft power of a pump machine, a plastic anticorrosive layer 8.2 is wrapped on inner magnetic steel 8.1 according to the process and the requirement of manufacturing an anticorrosive magnetic centrifugal pump, and an inner magnetic steel rotor 8 is combined by the inner magnetic steel 8.1, the plastic anticorrosive layer 8.2 and a magnetic steel fixing sleeve 8.3. The plastic anti-corrosion layer 8.2 can be wrapped by fluorinated ethylene propylene material, and engineering plastics such as polypropylene, polyethylene and the like can also be selected as the anti-corrosion wrapping material of the internal magnetic steel, but the preferable wrapping layer is the fluorinated ethylene propylene material, because the material has better temperature resistance, corrosion resistance, cracking resistance and processing performance. A key and a key groove are arranged between the magnetic steel fixing sleeve 8.3 and the main shaft 3.
The lock nut 12 is made of carbon steel.
The gasket is a blank cap flat gasket 16 or an O-shaped ring 17 and is made of rubber.
The isolation sleeve 7 and the external magnetic steel rotor 9 of the magnetic centrifugal pump are manufactured according to the manufacturing requirements and the process of the original magnetic centrifugal pump, and have no difference.
The thrust collar 14 arranged on the impeller 2 and the pump cover 4 is made of materials such as silicon carbide, modified graphite and the like, so long as the requirements on wear resistance, corrosion resistance and mechanical strength are met.
The components of other parts such as the mattress bed, the connecting bracket 10, the base 15 and the motor 11 are manufactured to be the same as the components of the conventional magnetic pump.
After the parts are manufactured or prepared, the assembly can be carried out, the assembly method is that the inner magnet steel rotor 8 is sleeved on the main shaft 3, the fastening nut 12 is screwed on the main shaft 3, the inner magnet steel rotor 8 is fixed at one end of the main shaft 3, then the flat gasket 16, the anti-corrosion nut 13 and the O-shaped rubber ring 17 are assembled in sequence, the shaft sleeve 5 is sleeved on the main shaft 3, the anti-abrasion supporting sleeve 6 is sleeved on the inner hole of the pump cover 4, the main shaft 3 and the shaft sleeve 5 penetrate through the middle hole of the anti-abrasion supporting sleeve 6, the pump cover 4, the thrust ring 14 and the impeller 2 are sleeved and combined together, the isolation sleeve 7 is installed on one side of the pump cover 4 and fastened, the impeller 2 and the pump cover 4 are installed on the pump shell 1, and the pump cover 4 and the pump shell 1 are clamped into a whole through the.
In the installation process, the installation of the external magnetic steel component 9, the motor 11 and the base 15 is the same as that of the conventional magnetic pump.
After each part equipment is accomplished, just can obtain through paint, debugging the large-scale magnetic drive centrifugal pump that corrosion resisting property is good, the price is economic.
Example 2: referring to embodiment 1, as shown in fig. 3, referring to embodiment 1, the other features are unchanged, a metal embedded part 2.1 is embedded in the impeller 2, the metal embedded part 2.1 and the main shaft 3 are of an integral structure, an external thread is processed on the other shaft head of the main shaft 3, the internal magnetic steel rotor 8 is exposed, a gasket 16, a screwed locking nut 12 and an anticorrosive nut 13 are sequentially sleeved on the main shaft 3, the anticorrosive nut 13 comprises a plastic cover 13.2 and an internal metal embedded part 13.1, and a threaded hole matched and screwed with the other shaft head of the main shaft 3 is formed in the metal embedded part 13.1.
Example 3: as shown in fig. 4, referring to embodiment 1, the other characteristics are unchanged, a metal embedded part 2.1 is embedded in the impeller 2, a through hole is formed in the metal embedded part 2.1, one shaft head of the main shaft 3 penetrates through the through hole in the metal embedded part 2.1, the other shaft head of the main shaft 3 penetrates out of the inner magnetic steel rotor 8, external threads are processed on both the shaft heads, the two shaft heads are sequentially sleeved with a gasket 16, a screwed locking nut 12 and an anticorrosive nut 13, the anticorrosive nut 13 comprises a plastic cover 13.2 and an inner metal embedded part 13.1, and a threaded hole matched and screwed with the shaft head of the main shaft 3 is formed in the metal embedded part 13.1. The structure has good function of preventing reversion.
Example 4: referring to embodiment 1, as shown in fig. 5, referring to embodiment 1, the other features are unchanged, a metal embedded part 2.1 is embedded in the impeller 2, a through hole is formed in the metal embedded part 2.1, a shaft head of the main shaft 3 penetrates through the through hole in the metal embedded part 2.1, an external thread is processed on the shaft head, and a gasket 16, a screwed locking nut 12 and an anticorrosive nut 13 are sequentially sleeved on the shaft head, the anticorrosive nut 13 comprises a plastic cover body 13.2 and an internal metal embedded part 13.1, a threaded hole matched and screwed with the shaft head of the main shaft 3 is formed in the metal embedded part 13.1, a circular boss 3.1 is arranged on the other shaft head of the main shaft 3, a plastic layer 3.2 is wrapped on the periphery of the boss 3.1, and a sealing gasket 16 is.
Example 5: referring to embodiment 1, as shown in fig. 6, referring to embodiment 1, the other characteristics are unchanged, a metal embedded part 2.1 is embedded in the impeller 2, a taper hole matched with the spindle head of the spindle 3 is formed in the metal embedded part 2.1, a through hole is formed in the center of the spindle 3, a screw 18 is inserted into the through hole, an external thread is processed at one end of the screw 18 and is screwed with a countersunk screw hole formed in the metal embedded part 2.1, an external thread is processed at the other end of the screw 18 and is locked by a fastening nut 12, the inner magnet steel rotor 8 is exposed at the other spindle head of the spindle 3, a gasket 16, a screwing locking nut 12 and an anticorrosive nut 13 are sequentially sleeved on the other spindle head of the spindle 3, the anticorrosive nut 13 includes a plastic cover 13.2 and an internal metal embedded part 13.1, and a threaded hole.
Example 6: referring to embodiment 1, as shown in fig. 7, with reference to the remaining features unchanged, the inner magnetic steel fixing sleeve 8.3 of the inner magnetic steel rotor 8 is provided with a countersunk screw hole, the corrosion-resistant nut 13 is screwed with the countersunk screw hole, one end spindle head of the main spindle 3 penetrates through the inner magnetic steel fixing sleeve 8.3, the spindle head is provided with an external thread, and the spindle head is screwed with the locking nut 12 for fixation.
Example 7: referring to embodiment 1, as shown in fig. 8, the remaining features are unchanged, the central hole of the inner magnetic steel fixing sleeve 8.3 of the inner magnetic steel rotor 8 is a countersunk hole, an internal thread is processed in the countersunk hole, and the spindle head is provided with an external thread which is screwed and fixed with the spindle head.
In the above embodiment, the parts of the pump casing 1, the impeller 3 and the spacer 7 that contact the liquid are made of one or a combination of engineering plastics.
The engineering plastics can be polyethylene, polypropylene, ultra-high molecular weight polyethylene, polyperfluorinated ethylene propylene and other plastics.
The purpose of embedding the metal embedded part in the impeller is to increase the mechanical strength of the plastic impeller and provide mounting and fixing conditions for the sealed metal main shaft.
The pump body can be of a plastic-lined structure or an all-plastic structure.
The metal main shaft is sealed in the sealing sleeve and isolated from external fluid, is not corroded by a conveyed medium, but plays a role in transferring torque to the main shaft by the external magnetic steel and the internal magnetic steel, and meets the corrosion prevention requirement of a large-scale corrosion prevention magnetic pump.
The material of the main shaft can be made of common carbon steel and stainless steel, and the technical scheme is not limited as long as the shaft power transmission of the magnetic pump can be met.
In order to prevent the loosening of the screw thread caused by the reverse rotation of the impeller and to have the function of adjusting the axial position of the impeller, a through-hole screw coupling (see fig. 4) is preferred.
The internal and external magnetic steels in the above embodiments are not limited to samarium-cobalt magnetic steels, and can be selected as long as the permanent magnets can satisfy the magnetic force set by the magnetic pump.
The shaft sleeve can be made of silicon carbide, modified silicon nitride and toughened ceramic, and can be made of metal alloy for the posts with high conveying temperature.
The metal alloy may be hastelloy, monel, duplex steel, or other hard alloy, as long as it matches the corrosion resistance of the medium to be conveyed, and is not limited herein.
The wear-resistant supporting sleeve 6 can be made of modified fluoroplastic, modified graphite and other modified materials.
The plastic anticorrosive layer 8.2 can be one of fluoroplastics, and can also be other functional engineering plastics.
In order to prevent dry abrasion between the shaft sleeve 5 and the wear-resistant support sleeve 6, it is effective to provide a liquid guiding groove in the wear-resistant support sleeve 6 or the shaft sleeve 5 and communicate with the liquid source.
In order to increase the strength of the pump cover, a metal framework 4.2 is arranged in the plastic pump cover.
The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Claims (12)
1. The anticorrosive magnetically driven centrifugal pump includes pump casing, pump cover, isolating sleeve, outer magnetic steel rotor and motor, and the pump casing, pump cover and isolating sleeve constitute one sealed cavity with impeller, main shaft and inner magnetic steel rotor inside.
2. The corrosion-resistant magnetically-driven centrifugal pump of claim 1, wherein the inner magnetic steel rotor comprises an inner magnetic steel hub, a plastic corrosion-resistant layer outside the inner magnetic steel hub, and inner magnetic steel encased within the plastic corrosion-resistant layer.
3. The corrosion-resistant magnetically-driven centrifugal pump of claim 1, wherein the sleeve is sleeved with at least one wear-resistant support sleeve disposed between the pump cover and the sleeve.
4. An anticorrosive magnetically-driven centrifugal pump according to claim 1, wherein the sleeve is provided with two thrust rings, one of which is disposed at the rear side of the impeller and the other of which is disposed at the front side of the internal magnet steel rotor.
5. The corrosion-resistant magnetic-driven centrifugal pump according to claim 1, wherein a metal embedded part is embedded in the impeller, a shaft hole is formed in the metal embedded part, an internal thread is formed in the shaft hole, an external thread is formed in a spindle head, the spindle head and the external thread are screwed, an external thread is formed in the other spindle head of the spindle, an internal magnetic steel rotor is exposed, a gasket, a screwed locking nut and a corrosion-resistant nut are sequentially sleeved on the internal magnetic steel rotor, the corrosion-resistant nut comprises a plastic cover body and the internal metal embedded part, and a threaded hole which is matched with the other spindle head of the spindle and screwed is formed in the metal embedded.
6. The corrosion-resistant magnetic-driven centrifugal pump according to claim 1, wherein a metal embedded part is embedded in the impeller, the metal embedded part and the main shaft are of an integral structure, an external thread is processed on the other shaft head of the main shaft to expose the inner magnetic steel rotor, a gasket, a screwing locking nut and a corrosion-resistant nut are sequentially sleeved on the other shaft head of the main shaft, the corrosion-resistant nut comprises a plastic cover body and an inner metal embedded part, and a threaded hole matched and screwed with the other shaft head of the main shaft is formed in the metal embedded part.
7. The corrosion-resistant magnetic-driven centrifugal pump according to claim 1, characterized in that a metal embedded part is embedded in the impeller, the metal embedded part is provided with a through hole, one spindle head of the main spindle penetrates through the through hole in the metal embedded part, the other spindle head of the main spindle penetrates through the inner magnetic steel rotor, external threads are respectively processed on the two spindle heads, the two spindle heads are sequentially sleeved with a gasket, screwed with a locking nut and a corrosion-resistant nut, the corrosion-resistant nut comprises a plastic cover body and an inner metal embedded part, and the metal embedded part is provided with a threaded hole which is matched with the spindle head and screwed with the spindle head.
8. The corrosion-resistant magnetic drive centrifugal pump according to claim 1, characterized in that a metal embedded part is embedded in the impeller, the metal embedded part is provided with a through hole, one spindle head of the main spindle penetrates through the through hole on the metal embedded part, external threads are processed on the spindle head, and a gasket, a locking nut and a corrosion-resistant nut are sequentially sleeved on the spindle head, the corrosion-resistant nut comprises a plastic cover body and an internal metal embedded part, the metal embedded part is provided with a threaded hole matched and screwed with one spindle head of the main spindle, the other spindle head of the main spindle is provided with a circular boss, the periphery of the boss is wrapped with a plastic layer, and a sealing gasket is arranged.
9. The anticorrosive magnetic force driven centrifugal pump according to claim 1, characterized in that a metal embedded part is embedded in the impeller, the metal embedded part is provided with a taper hole matched with the spindle nose, a through hole is formed in the center of the spindle, a screw rod is inserted into the through hole, an external thread is processed at one end of the screw rod and screwed with a countersunk head screw hole formed in the metal embedded part, an external thread is processed at the other end of the screw rod, a fastening nut is arranged for locking, the other spindle nose of the spindle is exposed out of the inner magnetic steel rotor, a gasket, a locking nut and an anticorrosive nut are sequentially sleeved, the anticorrosive nut comprises a plastic cover body and an inner metal embedded part, and a threaded hole matched and screwed with the other spindle nose of the spindle is.
10. The corrosion-resistant magnetic-driven centrifugal pump according to claim 1, wherein the inner magnetic steel fixing sleeve of the inner magnetic steel rotor is provided with a countersunk screw hole, the corrosion-resistant nut is screwed with the countersunk screw hole, a spindle head at one end of the spindle penetrates through the inner magnetic steel fixing sleeve, an external thread is arranged on the spindle head, and a locking nut is screwed on the spindle head for fixing.
11. The corrosion-resistant magnetically-driven centrifugal pump of claim 1, wherein the central bore of the inner magnetic steel fixture housing of the inner magnetic steel rotor is a countersunk bore, an internal thread is formed in the countersunk bore, and the spindle head is provided with an external thread for screwing and fixing.
12. The corrosion-resistant magnetic driving centrifugal pump according to claim 1, wherein the pump cover and the inner magnetic steel rotor are provided with a backflow hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021745833.8U CN213235466U (en) | 2020-08-20 | 2020-08-20 | Anticorrosive magnetic drive centrifugal pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021745833.8U CN213235466U (en) | 2020-08-20 | 2020-08-20 | Anticorrosive magnetic drive centrifugal pump |
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| CN213235466U true CN213235466U (en) | 2021-05-18 |
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| CN202021745833.8U Active CN213235466U (en) | 2020-08-20 | 2020-08-20 | Anticorrosive magnetic drive centrifugal pump |
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- 2020-08-20 CN CN202021745833.8U patent/CN213235466U/en active Active
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