CN109098978B - Idle-resistant liquid-land dual-purpose integrated modular temperature-resistant corrosion-resistant self-priming pump - Google Patents

Abstract

The invention relates to the technical field of self-priming pumps, in particular to an idling-resistant liquid-land dual-purpose integrated modular temperature-resistant corrosion-resistant self-priming pump, which comprises a motor and a pump head driven by the motor to pump liquid; the motor comprises a motor shell, a motor shaft, a rotor and a stator and is characterized in that the motor is a corrosion-resistant motor, the surface of the rotor of the motor is coated with a rotor plastic shell to form a rotor assembly, and the gap between the stator and the rotor assembly is 60-600 microns; the pump head adopts the plastics pump head, the impeller bottom plate of the output shaft coupling pump head of the corrosion resistant motor shaft of motor. Compared with the prior art, the asynchronous motor has the advantages that magnets are not needed, the magnetic density gap can reach 60-600 microns, and the problem of narrow magnetic density gap of the asynchronous motor is solved; the self-priming pump has the advantages of simple structure, simple transmission, wear resistance, corrosion resistance and self-priming realization, and solves the defects of complex damage, easy leakage and no idling resistance of the pump with the magnet.

Description

Idle-resistant liquid-land dual-purpose integrated modular temperature-resistant corrosion-resistant self-priming pump

Technical Field

The invention relates to the technical field of self-priming pumps, in particular to an idling-resistant liquid-land dual-purpose integrated modular temperature-resistant corrosion-resistant self-priming pump.

Background

Through the application survey of chemical auxiliary pump products in the global market, the corrosion-resistant zero-leakage pump in the market at present is a magnetic pump. The magnetic drive pump is mainly composed of a pump head, a magnetic cylinder of a magnetic driver, a motor, a base and the like. The magnetic driver of the magnetic pump consists of an outer magnetic rotor, an inner magnetic rotor and a non-magnetic separation sleeve. When the motor drives the outer magnetic rotor to rotate through the coupler, the magnetic field can penetrate through the air gap and the nonmagnetic substance isolation sleeve to drive the inner magnetic rotor connected with the impeller to synchronously rotate, so that the non-contact synchronous transmission of power is realized, and the dynamic sealing structure which is easy to leak is converted into a static sealing structure with zero leakage. The pump shaft and the inner magnetic rotor are completely sealed by the pump body and the isolation sleeve, so that the problems of leakage, overflow, dripping and leakage are thoroughly solved.

The rotor of the motor is formed by the magnet and the impeller of the brushless direct current magnetic force driving pump in an injection molding mode, a shaft sleeve which is directly formed by injection molding is arranged in the middle of the rotor and fixed in the shell through a high-performance ceramic shaft, the stator and the circuit board of the motor are encapsulated in the pump body through epoxy resin glue, a layer of thin wall is arranged between the stator and the rotor for isolation, and the traditional mechanical shaft seal is not needed to be matched, so that the motor is completely sealed. The torque of the motor is generated by a magnetic field generated after the coil on the silicon steel sheet stator is electrified to drive the permanent magnet rotor to work and operate. The magnets are charged n n in even number stages so that the magnet parts constitute a complete coupled magnetic system with each other. When the magnetic poles generated by the stator coil and the magnetic poles of the magnets are opposite in heteropolarity, namely the displacement angle phi between the two magnetic poles is 0, the magnetic energy of the magnetic system is the lowest at the moment; when the magnetic poles rotate to the same poles and are opposite, namely the displacement angle phi between the two magnetic poles is 2 pi/n, the magnetic energy of the magnetic system is maximum. After the external force is removed, the magnetic force can restore the magnet to the state of lowest magnetic energy because the magnetic poles of the magnetic system repel each other. The magnet then moves, causing the magnetic rotor to rotate. Magnetic pumps generally do not have a self-priming function.

However, in the application of the existing magnetic pump, no product can thoroughly ensure the idling resistance, and the infinite idling is ensured without damaging the parts of the pump. Through the survey reaction of market users, the magnetic drive pump also shows that the magnetic drive pump can not endure idle running, is bad and is troublesome to maintain. The old people need to fill the priming liquid, so the operation is troublesome, the durability is low, and the price is high.

The magnetic density gap of the asynchronous motor is too large and not good, but too narrow can also cause the stator and the rotor to sweep a chamber, and the chamber sweeping is that the outer surface of the rotor rubs against the inner wall of the stator; in addition, the efficiency of the machine is reduced due to the increased additional losses. The magnetic density gap of the asynchronous motor in the current market is too narrow, and is generally within the national standard of-100 microns. The magnetic close gap refers to an air gap of an asynchronous motor.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides a self-priming pump which has the advantages of no need of magnets in an impeller, wide gap, simple structure, simple transmission, wear resistance and corrosion resistance, and thoroughly solves the defects of complex and bad influence, easy leakage and no idling resistance of a pump with magnets.

In order to achieve the purpose, the idling-resistant liquid-land dual-purpose integrated modular temperature-resistant corrosion-resistant self-priming pump is designed, and comprises a motor and a pump head driven by the motor to pump liquid; the motor comprises a motor shell, a motor shaft, a rotor and a stator and is characterized in that,

the motor is a corrosion-resistant motor, and the motor shell is a plastic shell; the surface of the rotor is coated with a rotor plastic shell to form a rotor assembly; the motor shaft is a corrosion-resistant motor shaft; the clearance between the stator and the rotor component is 60-600 microns;

-the pump head adopts a plastic pump head, which comprises:

a pump head case in a cap shape with one end opened; the opening end of the pump head shell is fixed on the motor shell at one end of the motor shaft;

the plastic impeller is arranged in the pump head shell and comprises an impeller bottom plate, blades and an impeller cover plate; the bottom edges of the blades are uniformly distributed and fixed on the impeller bottom plate along the circumference, so that the bottom of the impeller is in a closed state; the impeller cover plate is a circular plate, a through hole is formed in the middle of the circular plate, the impeller cover plate is covered on the blades, and the outer ends of the blades do not exceed the outer edge of the impeller cover plate; a space is arranged between the outer circumference of the plastic impeller and the inner wall of the pump head shell;

the plastic partition plate is annular and is arranged in the pump head shell between the end surface of the pump head shell and the impeller cover plate; the circle center of the plastic partition plate and the circle center of the impeller cover plate are positioned on the same axis, and the outer edge of the plastic partition plate is connected with the inner wall of the pump head shell in a clamping and embedding manner, so that the pump head shell is divided into a liquid inlet cavity close to the end face of the pump head shell and a liquid outlet cavity close to the motor; a liquid outlet channel is formed between the adjacent blades, the through hole is communicated with the central hole of the plastic partition plate to form a liquid inlet channel between the liquid inlet cavity and the liquid outlet cavity, and progressive through flow and auxiliary self-suction are realized;

the liquid inlet pipe is arranged on the outer wall of the pump head shell corresponding to the liquid inlet cavity;

and the liquid outlet pipe is arranged on the outer wall of the pump head shell corresponding to the liquid outlet cavity.

The output end of the corrosion-resistant motor shaft is coupled with the impeller bottom plate.

The blades are arc-shaped, and one blade of any two adjacent blades is longer than the other blade.

The through hole of the impeller cover plate is a petal-shaped hollow hole, and the diameter of the central hole of the plastic partition plate is equal to the diameter of the outer circle of the petal-shaped hollow hole.

The motor also comprises corrosion-resistant bearing seats which are respectively embedded at two ends in the motor shell;

and two ends of the corrosion-resistant motor shaft are respectively connected in the corrosion-resistant bearing seat by adopting a corrosion-resistant bearing in a shaft coupling mode.

The liquid outlet pipe is arranged on the side wall close to the opening end of the pump head shell, and the central axis of the liquid outlet pipe is vertical to the central axis of the liquid inlet pipe; an included angle between the liquid outlet pipe and the outer wall of the pump head shell is an acute angle;

the liquid inlet pipe is arranged on the end face of the pump head shell, and the central axis of the liquid inlet pipe is parallel to the central axis of the corrosion-resistant motor shaft; the liquid inlet pipe is arranged on the pump head shell close to the liquid outlet pipe on the acute angle side; and a distance is arranged between the liquid inlet pipe and the circle center of the end surface of the pump head shell, so that the liquid inlet pipe is eccentrically arranged on the end surface of the pump head shell.

Two ends of the motor shell are respectively provided with a T-shaped counter bore for accommodating the corrosion-resistant bearing seat; the section of the corrosion-resistant bearing seat is T-shaped.

When the pump is used as a land pump, the corrosion-resistant bearing is a ceramic bearing; when the corrosion-resistant bearing is used as a submersible pump, the corrosion-resistant bearing is a stainless steel bearing;

when the pump is used as a land pump, the corrosion-resistant bearing seat is made of PP (polypropylene) plastic or PTFE (polytetrafluoroethylene) plastic; when the bearing seat is used as a submersible pump, the corrosion-resistant bearing seat is made of stainless steel.

The motor shell is made of PP plastic or PTFE plastic.

The inner wall of the motor shell is covered with a plastic layer; the plastic layer and the rotor plastic shell are respectively made of synthetic conductive plastics;

the synthetic conductive plastic is a tetrafluoro synthetic material or a carbon fiber synthetic material.

The plastic pump head is made of PP (polypropylene) plastic or PTFE (polytetrafluoroethylene) plastic;

the corrosion-resistant motor shaft is made of synthetic plastic or ceramic or stainless steel;

the rotor adopts a cast aluminum rotor.

Compared with the prior art, the impeller does not need a magnet, and the electromagnetism of the motor is completely utilized to drive the impeller to rotate; the pump head and the motor do not need to be sealed; the magnetic density gap of the motor can reach 60-600 microns, so that a plastic anticorrosive material can pass through the magnetic density gap, the static and dynamic zero-leakage separation of the stator and the rotor is ensured, the reliable stability and the applicability of the product are ensured, and the problem of narrow magnetic density gap of the asynchronous motor is solved; the self-priming pump has the advantages of simple structure, simple transmission, wear resistance, corrosion resistance and realization of self-priming, and thoroughly overcomes the defects of complex damage, easy leakage and no idling resistance of the pump with the magnet.

Drawings

Fig. 1 is one of perspective views of the present invention.

Fig. 2 is a second perspective view of the present invention.

Fig. 3 is a top view of the present invention.

Fig. 4 is a sectional view a-a shown in fig. 3.

Fig. 5 is a top view of the motor shaft with the corrosion resistant stator and rotor assembly of the present invention.

Fig. 6 is a perspective view of the present invention with the pump head casing removed.

Fig. 7 is a perspective view of fig. 6 with the motor housing removed.

Fig. 8 is a perspective view of a stator in the present invention.

Fig. 9 is a perspective view of a rotor assembly in the present invention.

Fig. 10 is a perspective view of a rotor in the present invention.

Fig. 11 is a top view of the impeller cover plate of the present invention.

Fig. 12 is a perspective top view of the plastic impeller of the present invention.

Detailed Description

The invention will now be further described with reference to the accompanying drawings.

Example 1

Referring to fig. 1 to 12, an idling-resistant liquid-land dual-purpose modular temperature-resistant corrosion-resistant self-priming pump comprises a motor and a pump head driven by the motor to pump liquid; the motor comprises a motor shell, a motor shaft, a rotor and a stator and is characterized in that,

-the motor is a corrosion-resistant motor,

the motor shell 10 is made of plastic; different plastic shells can be used according to the temperature conditions of use. PP is generally used at temperatures below 80 ℃ and tetrafluoro plastics are used at temperatures above 80 ℃ to 200 ℃.

Two corrosion-resistant bearing seats 7 are arranged and are respectively embedded at two ends in the motor shell 10;

the two ends of the corrosion-resistant motor shaft 14 are coupled in the corrosion-resistant bearing seat 7 by adopting corrosion-resistant bearings 8;

a rotor assembly formed by coating a rotor plastic shell 13 on the surface of the rotor 11; which is sleeved on the outer wall of the corrosion-resistant motor shaft 14;

a stator 12 formed by embedding a stator winding in a groove of a stator core; the rotor assembly is fixed on the inner wall of the motor shell 10 and is sleeved outside the rotor assembly in a clearance manner; the clearance 13-12 between the stator 12 and the rotor component is 60-600 microns; the stator 12 and the rotor component form static and dynamic separation;

-said pump head comprising:

a pump head casing 2 in the form of a cap having an open end; the opening end of the pump head shell 2 is fixed on a motor shell 10 at one end of a motor shaft; the end surface of the pump head shell 2 is provided with a liquid inlet pipe 1, and the central axis of the liquid inlet pipe 1 is parallel to the central axis of the corrosion-resistant motor shaft 14; a liquid outlet pipe 17 is arranged on the side wall close to the opening end of the pump head shell 2, and the central axis of the liquid outlet pipe 17 is vertical to the central axis of the liquid inlet pipe 1;

the plastic impeller is arranged in the pump head shell 2 and comprises an impeller bottom plate 5-1, blades 5 and an impeller cover plate 4; the bottom edges of the blades 5 are uniformly distributed and fixed on the impeller bottom plate 5-1 along the circumference, so that the bottom of the impeller is in a closed state; the impeller cover plate 4 is a circular plate, a through hole is formed in the middle of the circular plate, the impeller cover plate 4 covers the upper edges of the blades 5, and the outer ends of the blades 5 do not exceed the outer edge of the impeller cover plate 4; a space is arranged between the outer circumference of the plastic impeller and the inner wall of the pump head shell 2; the outer diameters of the impeller cover plate and the impeller base plate are determined according to the series size of the pump;

the plastic partition plate 3 is annular and is arranged in the pump head shell 2 between the end face of the pump head shell 2 and the impeller cover plate 4; the circle center of the plastic partition plate 3 and the circle center of the impeller cover plate 4 are positioned on the same axis, and the outer edge of the plastic partition plate 3 is connected with the inner wall of the pump head shell 2 in a clamping and embedding manner, so that the pump head shell 2 is divided into a liquid inlet cavity and a liquid outlet cavity; a liquid outlet channel is formed between the adjacent blades 5, the through hole of the impeller cover plate 4 is communicated with the central hole of the plastic partition plate 3 to form a liquid inlet channel between the liquid inlet cavity and the liquid outlet cavity, so that progressive through flow is realized and an auxiliary self-suction effect is achieved;

the output end of the corrosion-resistant motor shaft 14 is coupled with the impeller baseplate 5-1 to form a corrosion-resistant condition of the whole machine.

The corrosion-resistant effect of the rotor is further ensured by coating the rotor plastic shell 13 outside the rotor 11; the impeller in the pump head does not need a magnet, so that the magnetic density gap of the impeller can reach 60-600 micrometers, and optimally can reach 300-600 micrometers, and the problem of narrow magnetic density gap of an asynchronous motor is solved. When the device works, the rotor 11 drives the corrosion-resistant motor shaft 14 and the plastic impeller to rotate in sequence, so that liquid enters the liquid inlet cavity from the liquid inlet pipe 1, then passes through the liquid inlet channel between the plastic partition plate 3 and the impeller cover plate 4, and then sequentially passes through the liquid outlet channel between adjacent blades and the liquid outlet cavity to be discharged to the liquid outlet pipe 17.

Among the actual chemical pumps, the only pumps that can achieve zero leakage are magnetic pumps, which are not resistant to idle rotation. The self-priming pump can achieve zero leakage and completely solve the service life effect of unlimited idling resistance. The effect of the charged magnet is solved by the electromagnetic potential of the motor, thereby advancing the pace of the user for reducing consumption and protecting environment, and the pump head and the motor do not need to be sealed.

Furthermore, the blades are arc-shaped, so that an arc-shaped liquid outlet channel is formed between every two adjacent blades, and water inlet and outlet are smoother. And one blade of any two adjacent blades 5 is longer than the other blade, wherein the long blade is used for solving the liquid inlet effect and the lift auxiliary effect, and the short blade is used for the pressurization effect.

Furthermore, the through hole of the impeller cover plate 4 is a petal-shaped hollow hole, and the diameter of the central hole of the plastic partition plate 3 is equal to the outer circle diameter of the petal-shaped hollow hole.

Further, the motor also comprises corrosion-resistant bearing seats 7 which are respectively embedded at two ends in the motor shell 10;

two ends of the corrosion-resistant motor shaft 14 are respectively coupled in the corrosion-resistant bearing seat 7 by using corrosion-resistant bearings 8.

Furthermore, two ends of the motor housing 10 are respectively provided with a T-shaped counter bore for accommodating the corrosion-resistant bearing seat 7; the section of the corrosion-resistant bearing seat 7 is T-shaped, so that the corrosion-resistant bearing seat is convenient to fix.

Further, referring to fig. 3, the liquid outlet pipe 17 is disposed on the side wall near the opening end of the pump head casing 2, and the central axis of the liquid outlet pipe 17 is perpendicular to the central axis of the liquid inlet pipe 1; an included angle between the liquid outlet pipe 17 and the outer wall of the pump head shell 2 is an acute angle;

the liquid inlet pipe 1 is arranged on the end surface of the pump head shell 2, and the central axis of the liquid inlet pipe 1 is parallel to the central axis of the corrosion-resistant motor shaft 14; the liquid inlet pipe 1 is arranged on the pump head shell 2 close to the liquid outlet pipe 17 on the acute angle side; and a distance is arranged between the circle centers of the end surfaces of the liquid inlet pipe 1 and the pump head shell 2, so that the liquid inlet pipe 1 is eccentrically arranged on the end surface of the pump head shell 2.

Further, when the pump is used as a land pump, the corrosion-resistant bearing 8 is a ceramic bearing; when the corrosion-resistant bearing 8 is used as a submersible pump, a stainless steel bearing is adopted;

when the pump is used as a land pump, the corrosion-resistant bearing seat 7 is made of PP (polypropylene) plastic or PTFE (polytetrafluoroethylene) plastic; when the corrosion-resistant bearing seat is used as a submersible pump, the corrosion-resistant bearing seat 7 is made of stainless steel.

Further, the motor housing 10 is made of PP plastic or tetrafluoro plastic

Further, a plastic layer is coated on the inner wall of the motor housing 10; the plastic layer and the rotor plastic shell 13 are respectively made of synthetic conductive plastics; the synthetic conductive plastic is a tetrafluoro synthetic material or a carbon fiber synthetic material.

Further, the plastic partition plate 3 is made of PP plastic or PTFE plastic.

Further, the corrosion-resistant motor shaft 14 is made of synthetic plastic or ceramic or stainless steel.

Further, the rotor 11 is a cast aluminum rotor.

The self-priming pump not only solves the problems of zero leakage, self priming and simple and convenient maintenance, but also completely solves the service life effect of no limitation and idling resistance. The effect that the original magnetic pump needs to be additionally provided with a charging magnet is achieved by the magnetic potential of the motor, the processing cost of magnet packaging with the additional magnet is saved, the power of the motor is consumed by the running of the magnet, and the defect that the magnet is heated for a long time and demagnetized is also overcome. The device has the advantages of consumption reduction, environmental protection and propulsion for convenient disassembly, assembly and maintenance of users.

In the practical application technology of the motor, the lowest cost is the asynchronous motor. The asynchronous wide-gap motor can be maintained conveniently, and the cost is saved. The pump motor is different from a market asynchronous motor in that the magnetic potential surface of a motor capacity body is changed, the air gap of the motor is widened, a plastic anti-corrosion material can pass through the middle of the air gap, the static and dynamic zero-leakage separation of a stator and a rotor is guaranteed, and the reliable stability and the applicability of a product are guaranteed. Namely: double-sided notes in the global asynchronous machine standard: the unilateral air gap is divided by 2 and the air gap is between 40um and 80um, and at most, the unilateral air gap does not exceed 100um, and the fact that the air gap is narrow is not contended. The optimal air gap of the motor is 300um to 600um, so that the application mode limitation of the original asynchronous motor is broken.

The wide-gap motor is used for an idle-running-resistant integrated modular temperature-resistant corrosion-resistant self-priming pump at present, and is further applied to a submersible pump and a high-speed ship integrated propeller in the future to realize speed change of a propeller in separated water. The wide gap motor can be applied to industries such as chemical industry, electroplating, environmental protection, sewage treatment, papermaking, semiconductors, printed circuit boards, electric power, subways, desulfurization, ship transportation and the like in special application synthetic products. Thereby opening up the market demand.

Claims (10)

1. An idling-resistant liquid-land dual-purpose integrated modular temperature-resistant corrosion-resistant self-priming pump comprises a motor and a pump head driven by the motor to pump liquid; the motor comprises a motor shell, a motor shaft, a rotor and a stator and is characterized in that,

the motor is a corrosion-resistant motor, and a motor shell (10) of the motor is a plastic shell; the surface of the rotor (11) is coated with a rotor plastic shell (13) to form a rotor assembly; the motor shaft adopts a corrosion-resistant motor shaft (14); the clearance between the stator and the rotor component is 60-600 microns;

-the pump head adopts a plastic pump head, which comprises:

a pump head case (2) in the form of a cap having an open end; the opening end of the pump head shell (2) is fixed on a motor shell (10) at one end of a motor shaft;

the plastic impeller is arranged in the pump head shell (2) and comprises an impeller bottom plate (5-1), blades (5) and an impeller cover plate (4); the bottom edges of the blades (5) are uniformly distributed and fixed on the impeller bottom plate (5-1) along the circumference to ensure that the bottom of the impeller is in a closed state; the impeller cover plate (4) is a circular plate, a through hole is formed in the middle of the circular plate, the impeller cover plate (4) covers the upper edges of the blades (5), and the outer ends of the blades (5) do not exceed the outer edge of the impeller cover plate (4); a space is arranged between the outer circumference of the plastic impeller and the inner wall of the pump head shell (2);

the plastic partition plate (3) is annular and is arranged in the pump head shell (2) between the end face of the pump head shell (2) and the impeller cover plate (4); the circle center of the plastic partition plate (3) and the circle center of the impeller cover plate (4) are positioned on the same axis, the outer edge of the plastic partition plate (3) is connected with the inner wall of the pump head shell (2) in a clamping and embedding manner, so that the pump head shell (2) is divided into a liquid inlet cavity close to the end face of the pump head shell (2) and a liquid outlet cavity close to a motor; a liquid outlet channel is formed between the adjacent blades (5), the through hole is communicated with the central hole of the plastic partition plate (3) to form a liquid inlet channel between the liquid inlet cavity and the liquid outlet cavity, and progressive through flow and auxiliary self-suction are realized;

the liquid inlet pipe (1) is arranged on the outer wall of the pump head shell (2) corresponding to the liquid inlet cavity;

the liquid outlet pipe (17) is arranged on the outer wall of the pump head shell (2) corresponding to the liquid outlet cavity;

the output end of the corrosion-resistant motor shaft (14) is coupled with the impeller bottom plate (5-1).

2. The dual-purpose modular temperature-resistant corrosion-resistant self-priming pump of claim 1, characterized in that: the blades are arc-shaped, and one blade of any two adjacent blades (5) is longer than the other blade.

3. The dual-purpose modular temperature-resistant corrosion-resistant self-priming pump of claim 1, characterized in that: the through hole of the impeller cover plate (4) is a petal-shaped hollow hole, and the diameter of the central hole of the plastic partition plate (3) is equal to the outer circle diameter of the petal-shaped hollow hole.

4. The dual-purpose modular temperature-resistant corrosion-resistant self-priming pump of claim 1, characterized in that: the motor also comprises corrosion-resistant bearing seats (7) which are respectively embedded at two ends in the motor shell (10);

two ends of the corrosion-resistant motor shaft (14) are respectively coupled in the corrosion-resistant bearing seat (7) by adopting corrosion-resistant bearings (8).

5. The dual-purpose modular temperature-resistant corrosion-resistant self-priming pump of claim 1, characterized in that:

the liquid outlet pipe (17) is arranged on the side wall close to the opening end of the pump head shell (2), and the central axis of the liquid outlet pipe (17) is vertical to the central axis of the liquid inlet pipe (1); an included angle between the liquid outlet pipe (17) and the outer wall of the pump head shell (2) is an acute angle;

the liquid inlet pipe (1) is arranged on the end face of the pump head shell (2), and the central axis of the liquid inlet pipe (1) is parallel to the central axis of the corrosion-resistant motor shaft (14); the liquid inlet pipe (1) is arranged on the pump head shell (2) close to the liquid outlet pipe (17) on the acute angle side; a distance is arranged between the circle centers of the end surfaces of the liquid inlet pipe (1) and the pump head shell (2), so that the liquid inlet pipe (1) is eccentrically arranged on the end surface of the pump head shell (2).

6. The dual-purpose modular temperature-resistant corrosion-resistant self-priming pump of claim 4, characterized in that: two ends of the motor shell (10) are respectively provided with a T-shaped counter bore for accommodating the corrosion-resistant bearing seat (7); the section of the corrosion-resistant bearing seat (7) is T-shaped.

7. The dual-purpose modular temperature-resistant corrosion-resistant self-priming pump of claim 4, characterized in that:

when the pump is used as a land pump, the corrosion-resistant bearing (8) is a ceramic bearing; when the corrosion-resistant bearing is used as a submersible pump, a stainless steel bearing is adopted as the corrosion-resistant bearing (8);

when the pump is used as a land pump, the corrosion-resistant bearing seat (7) is made of PP (polypropylene) plastic or PTFE (polytetrafluoroethylene) plastic; when the corrosion-resistant bearing seat is used as a submersible pump, the corrosion-resistant bearing seat (7) is made of stainless steel.

8. The dual-purpose modular temperature-resistant corrosion-resistant self-priming pump of claim 1, characterized in that: the motor shell (10) is made of PP plastic or PTFE plastic.

9. The dual-purpose modular temperature-resistant corrosion-resistant self-priming pump of claim 1, characterized in that:

the inner wall of the motor shell (10) is covered with a plastic layer; the plastic layer and the rotor plastic shell (13) are respectively made of synthetic conductive plastics;

the synthetic conductive plastic is a tetrafluoro synthetic material or a carbon fiber synthetic material.

10. The dual-purpose modular temperature-resistant corrosion-resistant self-priming pump of claim 1, characterized in that:

the plastic pump head is made of PP (polypropylene) plastic or PTFE (polytetrafluoroethylene) plastic;

the corrosion-resistant motor shaft (14) is made of synthetic plastics or ceramic or stainless steel;

the rotor (11) adopts a cast aluminum rotor.

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