Energy-saving high-corrosion-resistant plastic magnetic drive pump

Abstract

The utility model relates to an energy -conserving high -resistant plastic magnetic force drive pump, including frequency changer, the frequency changer right side connection motor, the motor upper end connection junction box, and motor lower extreme fixed connection support base, the motor front end and rear end all fixed connection mounting block, the mounting block is one group four rectangle distribution, the motor right side connection pump body, the pump body right side connection inlet and outlet, improve pump body corrosion -resisting capacity through setting up composite plastic pump body, the neodymium iron boron permanent magnet surface is plated AlNiCo protection layer, prevents medium corrosion, bionic spiral blade structure, reduces turbulent loss, the balance hole is opened to impeller back, reduces axial force, improves bearing life, and moreover set up inlet and outlet all are vertically upwards, high -position liquid -intaking can ensure that pump cavity fills liquid beforehand, avoids dry -running, and inlet and outlet same -direction arrangement can reduce pipeline intersection, reduce fluid resistance loss, and energy -conserving effect is good.

Description

Technical Field

[0001] This utility model relates to the field of magnetic pump technology, and in particular to an energy-saving and highly corrosion-resistant plastic magnetic drive pump. Background Technology

[0002] Traditional mechanical seal pumps have the risk of shaft seal leakage, which can lead to the leakage of corrosive media, polluting the environment and incurring high maintenance costs. Metal pumps have limited corrosion resistance, are heavy, and consume a lot of energy. Ordinary plastic pumps are not strong enough and are prone to aging. The permanent magnets of magnetically driven pumps are prone to demagnetization under high temperature or dry running conditions, which affects their lifespan.

[0003] Patent No. CN202421904618.6 discloses a corrosion-resistant magnetic pump. It features a locking plate (first and second plates) whose external structures match, and an adjustment mechanism that allows simultaneous adjustment of the positions of both plates. This quickly limits the pump's position, preventing displacement. A locking groove engages with a locking clip on the pump's exterior, and a mounting base supports and limits the pump, facilitating installation and disassembly, improving work efficiency, and simplifying subsequent maintenance. It also prevents corrosion after prolonged use, ensuring a longer service life. However, this patent has the following drawbacks: firstly, poor corrosion resistance, making it unsuitable for transporting corrosive liquids; secondly, low impeller efficiency and poor energy-saving performance. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by using a composite plastic pump body to improve the pump's corrosion resistance, coating the surface of the neodymium iron boron permanent magnet with an AlNiCo protective layer to prevent media corrosion, employing a biomimetic spiral blade structure to reduce turbulence losses, and using a balance hole on the back of the impeller to reduce axial force and improve bearing life. Furthermore, the inlet and outlet ports are both vertically upward, with high-level inlet ensuring the pump chamber is pre-filled with liquid to prevent dry running, and the unidirectional arrangement of the inlet and outlet ports reducing pipe crossings, lowering fluid resistance losses, and achieving good energy-saving effects. This invention solves the technical problems of poor corrosion resistance and poor energy-saving performance in existing magnetic pumps.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An energy-saving and corrosion-resistant plastic magnetic drive pump includes a frequency converter. A motor is connected to the right side of the frequency converter. A junction box is connected to the upper end of the motor, and a support base is fixedly connected to the lower end of the motor. Mounting blocks are fixedly connected to both the front and rear ends of the motor. The mounting blocks are arranged in a group of four rectangles. The pump body is connected to the right side of the motor, and the inlet and outlet are connected to the right side of the pump body.

[0007] As a preferred embodiment, the pump body is a composite plastic pump body, which is formed by multi-layer co-extrusion of PP / PVDF / ETFE. The outermost layer of the pump body is an anti-UV aging layer, the middle layer is a reinforcing layer, and the inner layer is a corrosion-resistant layer. The anti-UV aging layer is an ETFE ethylene-tetrafluoroethylene copolymer layer, the reinforcing layer is a carbon fiber PP polypropylene layer, and the corrosion-resistant layer is a PVDF polyvinylidene fluoride layer.

[0008] As a preferred embodiment, the pump body is provided with an inner rotor, an outer rotor, an isolation sleeve, a permanent magnet and an impeller. The outer rotor is provided with a permanent magnet inside, the permanent magnet is provided with an isolation sleeve inside, the isolation sleeve is provided with an inner rotor inside, and a pump shaft is provided at the center of the inner side of the inner rotor. The impeller is connected to the left side of the pump shaft.

[0009] As a preferred embodiment, the inlet and outlet include an inlet and an outlet, both of which open vertically upwards.

[0010] As a preferred embodiment, both the motor and the pump body are covered with heat sinks.

[0011] As a preferred embodiment, both the inner rotor and the outer rotor are ceramic inner rotors and ceramic outer rotors.

[0012] As another preferred embodiment, the isolation sleeve is made of Hastelloy C, the surface of the permanent magnet is coated with an AlNiCo protective layer, the impeller adopts a biomimetic spiral blade structure, and a balance hole is provided on the back of the impeller.

[0013] The beneficial effects of this utility model are:

[0014] (1) In this utility model, by setting inlet and outlet, both the inlet and outlet are set upwards. High-level liquid inlet can ensure that the pump chamber is filled with liquid in advance to avoid dry running. Dry running of magnetic pump will cause demagnetization. The inlet and outlet are arranged in the same direction to reduce pipe crossing, reduce fluid resistance loss, and achieve energy saving effect.

[0015] (2) In this utility model, the pump body is made of composite plastic, with the inner layer being corrosion resistant, the outer layer being UV aging resistant, and the middle reinforcing layer being reinforced with carbon fiber to improve mechanical strength.

[0016] (3) In this utility model, an AlNiCo protective layer is plated on the surface of the permanent magnet to prevent medium corrosion.

[0017] (4) In this utility model, by setting the impeller as a biomimetic spiral impeller, the turbulence loss is reduced, and the balance hole is opened on the back of the impeller to reduce the axial force and improve the bearing life. The bearing is installed on the shaft section between the back of the impeller and the pump casing to bear the radial force and part of the axial force of the impeller, thereby achieving the effect of energy saving. Because excessive axial force will increase the load on the bearing and lead to increased frictional power consumption.

[0018] In summary, this magnetic pump has the advantages of good energy saving and strong corrosion resistance, and is especially suitable for the field of magnetic pump technology. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the reinforcing layer in this utility model.

[0022] Figure 3 This is a schematic diagram of the inner rotor and outer rotor in this utility model. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0024] Example 1

[0025] like Figures 1 to 3 As shown, this utility model provides an energy-saving and highly corrosion-resistant plastic magnetic drive pump, including a frequency converter 1. The frequency converter 1 is connected to a motor 2 on its right side. The upper end of the motor 2 is connected to a junction box 21, and the lower end of the motor 2 is fixedly connected to a support base 22. The front and rear ends of the motor 2 are fixedly connected to mounting blocks 23, which are arranged in a group of four rectangles. The right side of the motor 2 is connected to a pump body 3, and the right side of the pump body 3 is connected to an inlet and outlet port 4. The mounting blocks 23 arranged at the front and rear can realize multi-directional installation of the magnetic pump, making it more adaptable.

[0026] Furthermore, the pump body 3 is a composite plastic pump body, which is formed by multi-layer co-extrusion molding of PP / PVDF / ETFE. The outermost layer of the pump body 3 is an anti-UV aging layer 31, the middle layer is a reinforcing layer 32, and the inner layer is a corrosion-resistant layer 33. The anti-UV aging layer 31 is an ETFE ethylene-tetrafluoroethylene copolymer layer, the reinforcing layer 32 is a carbon fiber PP polypropylene layer, and the corrosion-resistant layer 33 is a PVDF polyvinylidene fluoride layer. The ETFE ethylene-tetrafluoroethylene copolymer layer resists ultraviolet aging and environmental erosion, extending its outdoor service life. The PVDF polyvinylidene fluoride layer is in direct contact with corrosive media, providing the highest corrosion resistance. The reinforcing layer 32 improves the overall structural strength through carbon fiber mesh, compensating for the insufficient rigidity of the plastic pump body.

[0027] Furthermore, the pump body 3 is equipped with an inner rotor 34, an outer rotor 35, an isolation sleeve 36, a permanent magnet 37, and an impeller 38. The outer rotor 35 is equipped with a permanent magnet 37, the permanent magnet 37 is equipped with an isolation sleeve 36, the isolation sleeve 36 is equipped with an inner rotor 34, and the pump shaft is located at the center of the inner rotor 34. The impeller 38 is connected to the left side of the pump shaft. The outer rotor 35 is connected to the motor 2, and the inner rotor 34 is connected to the impeller 38. Through the high-performance permanent magnet 37 (neodymium iron boron N54), a strong magnetic field coupling is generated, realizing contactless torque transmission and completely eliminating the risk of mechanical seal leakage. The isolation sleeve 36 is made of Hastelloy C276, which physically isolates the medium from the magnet, forming a fully enclosed structure.

[0028] Furthermore, the inlet and outlet ports 4 include an inlet port 41 and an outlet port 42. Both the inlet port 41 and the outlet port 42 open vertically upwards. The upward orientation of both the inlet port 41 and the outlet port 42 ensures that the pump chamber is pre-filled with liquid, preventing dry running. Dry running of a magnetic pump can lead to demagnetization. The unidirectional arrangement of the inlet and outlet ports 4 can reduce pipe crossings, reduce fluid resistance loss, and achieve energy saving.

[0029] Furthermore, both the motor 2 and the pump body 3 are covered with heat sinks 24, which provide good heat dissipation.

[0030] Furthermore, both the inner rotor 34 and the outer rotor 35 are ceramic inner rotors and ceramic outer rotors. Both the inner rotor 34 and the outer rotor 35 are made of ceramic material. Ceramic is an insulator, which avoids eddy current losses, improves magnetic transmission efficiency, and can also reduce bearing load, thus achieving a better energy-saving effect.

[0031] Furthermore, the isolation sleeve 36 is made of Hastelloy C276, the permanent magnet 37 is coated with an AlNiCo protective layer, and the impeller 38 adopts a biomimetic spiral blade structure with a balance hole on the back. The Hastelloy C276 isolation sleeve is an all-around corrosion-resistant alloy with good tensile strength, which can be processed into ultra-thin walls to reduce eddy current losses and achieve energy-saving effects. The neodymium iron boron permanent magnet 37 is coated with an AlNiCo protective layer to prevent media corrosion. The balance hole on the back of the impeller 38 reduces axial force and improves bearing life.

[0032] Working process: First, the frequency converter 1 is connected to the motor 2, enabling the magnetic pump to be equipped with frequency conversion control, dynamically adjusting the flow rate to reduce energy consumption. When the motor 2 is working, the output shaft connected to the motor 2 drives the outer rotor 35 to rotate. The outer rotor 35 is connected to a permanent magnet 37 on its inner side. The permanent magnet 37 performs work on the inner rotor 34, causing the inner rotor 34 to rotate, thus achieving magnetic drive. The rotation of the inner rotor 34 drives the pump shaft at its center to rotate, and the rotation of the pump shaft drives the impeller 38 to rotate. Liquid enters through the inlet 41 and exits through the outlet 42, thus achieving contactless magnetic coupling transmission. Both the inlet 41 and the outlet 42 are set vertically upward, which is suitable for occasions with limited space. The inlet and outlet are arranged in the same direction to reduce pipe crossing and reduce fluid resistance loss. When the liquid inlet is located at the top, the gas in the pump chamber can be more easily discharged through the outlet, reducing the risk of cavitation. The high-level liquid inlet can ensure that the pump chamber is pre-filled with liquid to avoid dry running. The entire magnetic pump has good energy-saving effect and strong corrosion resistance.

[0033] In the description of this utility model, it should be understood that the terms "front and back", "left and right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0034] Of course, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.

[0035] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. An energy-saving and highly corrosion-resistant plastic magnetic drive pump, characterized in that: include A frequency converter (1) is connected to a motor (2) on the right side. The upper end of the motor (2) is connected to a junction box (21), and the lower end of the motor (2) is fixedly connected to a support base (22). The front and rear ends of the motor (2) are fixedly connected to mounting blocks (23). The mounting blocks (23) are arranged in a group of four rectangles. The right side of the motor (2) is connected to a pump body (3), and the right side of the pump body (3) is connected to the inlet and outlet ports (4). The pump body (3) is a composite plastic pump body, which is formed by multi-layer co-extrusion of PP / PVDF / ETFE. The outermost layer of the pump body (3) is an anti-UV aging layer (31), the middle layer is a reinforcing layer (32), and the inner layer is a corrosion-resistant layer (33). The anti-UV aging layer (31) is an ETFE ethylene-tetrafluoroethylene copolymer layer, the reinforcing layer (32) is a carbon fiber PP polypropylene layer, and the corrosion-resistant layer (33) is a PVDF polyvinylidene fluoride layer. The pump body (3) is provided with an inner rotor (34), an outer rotor (35), an isolation sleeve (36), a permanent magnet (37) and an impeller (38). The outer rotor (35) is provided with a permanent magnet (37) inside, the permanent magnet (37) is provided with an isolation sleeve (36) inside, the isolation sleeve (36) is provided with an inner rotor (34) inside, and a pump shaft is provided at the center of the inner side of the inner rotor (34). The impeller (38) is connected to the left side of the pump shaft. The inlet and outlet (4) includes an inlet (41) and an outlet (42), and the openings of the inlet (41) and the outlet (42) are both vertically upward; The isolation sleeve (36) is made of Hastelloy C276, the permanent magnet (37) is coated with an AlNiCo protective layer, the impeller (38) adopts a biomimetic spiral blade structure, and a balance hole is provided on the back of the impeller.

2. The energy-saving and highly corrosion-resistant plastic magnetic drive pump according to claim 1, characterized in that, The motor (2) and pump body (3) are both covered with heat sinks (24).

3. The energy-saving and highly corrosion-resistant plastic magnetic drive pump according to claim 1, characterized in that, The inner rotor (34) and outer rotor (35) are both ceramic inner rotor and ceramic outer rotor.

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