Magnetic self-priming pump structure

Abstract

The utility model discloses a magnetic force self-priming pump structure which comprises a pump body, a pump shaft is arranged in the pump body, an impeller is arranged at one end of the pump shaft, an isolation sleeve is arranged at the other end of the pump shaft, the isolation sleeve abuts against a pump cover on the pump body, an inner magnetic rotor is arranged between the impeller and the isolation sleeve, and an outer magnetic rotor is arranged between the impeller and the isolation sleeve. The inner magnetic rotor is arranged on the pump shaft in a penetrating manner; the motor is arranged at one end of the pump body, and an outer magnetic rotor is arranged on a driving shaft of the motor; one end of the connecting frame is connected with the pump body, the other end of the connecting frame is connected with the motor, and the outer magnetic rotor is located in the connecting frame. Compared with the prior art, the utility model has the advantages of self-absorption, full sealing and corrosion resistance, can realize stable, continuous and efficient operation, and can effectively improve the working efficiency and the environmental quality and enhance the social benefit.

Description

Technical Field

[0001] This utility model belongs to the field of self-priming pumps, and particularly relates to a magnetic self-priming pump structure. Background Technology

[0002] Magnetic drive pumps, commonly used in modern industry for liquid transportation, are pumps that transmit power using magnetic coupling technology. Because they replace dynamic seals with static seals, ensuring a completely sealed state for the flow components, they completely solve the problems of leakage, dripping, and spillage inherent in other centrifugal pump shaft seals. Therefore, using magnetic drive pumps effectively avoids leakage problems and reduces potential hazards to the environment and operators during liquid pumping. This makes their performance and safety a major concern, meeting the stringent environmental and safety requirements of modern industry.

[0003] Self-priming centrifugal pumps are characterized by their compact structure, convenient operation, stable running, easy maintenance, high efficiency, and long service life, along with the advantage of self-priming. Before operation, only a certain amount of priming liquid needs to be stored in the pump body, simplifying the piping system and improving working conditions. With the continuous development of industry and evolving environmental requirements, pumps that integrate the strengths of both technologies to meet specific user needs will undoubtedly have a broad application market and promising development prospects. Utility Model Content

[0004] This utility model provides a magnetic self-priming pump structure with self-priming, full sealing and corrosion resistance, which can achieve stable, continuous and efficient operation, effectively improve work efficiency, environmental quality and enhance social benefits.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a magnetic self-priming pump structure, comprising:

[0006] The pump body has a pump shaft inside, an impeller is provided at one end of the pump shaft, and an isolation sleeve is provided at the other end of the pump shaft. The isolation sleeve abuts against the pump cover on the pump body. An inner magnetic rotor is provided between the impeller and the isolation sleeve and passes through the pump shaft.

[0007] An electric motor is provided at one end of the pump body, and an external magnetic rotor is provided on the drive shaft of the motor.

[0008] A connecting frame, one end of which is connected to the pump body and the other end of which is connected to the motor, with the external magnetic rotor located inside the connecting frame.

[0009] As a further description of the above technical solution:

[0010] A first sealing ring is provided between the pump cover and the pump body.

[0011] As a further description of the above technical solution:

[0012] A second sealing ring is provided between the pump cover and the isolation sleeve.

[0013] As a further description of the above technical solution:

[0014] A front bearing is provided between the pump cover and the pump shaft, and a rear bearing is provided between the isolation sleeve and the pump shaft.

[0015] As a further description of the above technical solution:

[0016] The pump body is provided with an impeller cavity, the impeller is located in the impeller cavity, and an inlet pipe and an outlet pipe are provided on the impeller cavity. Both the inlet pipe and the outlet pipe are provided with flanges.

[0017] As a further description of the above technical solution:

[0018] The pump body is made of fluoroplastics, corrosion-resistant stainless steel, corundum ceramics, or PTFE graphite.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0020] 1. In this utility model, the magnetic self-priming pump has the function of a magnetic pump and also integrates self-priming. It does not require a foot valve or priming water, and the self-priming height can reach 4m.

[0021] 2. In this utility model, the magnetic self-priming pump has low vibration and noise, stable operation, and can effectively improve work efficiency, environmental quality and enhance social benefits. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a magnetic self-priming pump structure.

[0024] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0025] Legend:

[0026] 1. Pump body; 2. Pump shaft; 3. Impeller; 4. Isolation sleeve; 5. Pump cover; 6. Inner magnetic rotor; 7. Motor; 8. Outer magnetic rotor; 9. Connecting frame; 10. First sealing ring; 11. Second sealing ring; 12. Front bearing; 13. Rear bearing; 14. Impeller cavity; 15. Inlet pipe; 16. Outlet pipe. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-2 This utility model provides a technical solution: a magnetic self-priming pump structure, which includes:

[0029] Pump body 1, pump shaft 2 is provided inside pump body 1, impeller 3 is provided at one end of pump shaft 2, isolation sleeve 4 is provided at the other end of pump shaft 2, isolation sleeve 4 abuts against pump cover 5 on pump body 1, inner magnetic rotor 6 is provided between impeller 3 and isolation sleeve 4, and inner magnetic rotor 6 passes through pump shaft 2;

[0030] Motor 7, the motor 7 is disposed at one end of the pump body 1, and an external magnetic rotor 8 is disposed on the drive shaft of the motor 7;

[0031] A connecting frame 9 is provided, one end of which is connected to the pump body 1, and the other end of which is connected to the motor 7. The external magnetic rotor 8 is located inside the connecting frame 9.

[0032] A first sealing ring 10 is provided between the pump cover 5 and the pump body 1. The first sealing ring is made of fluororubber, which is corrosion-resistant and can improve service life.

[0033] A second sealing ring 11 is provided between the pump cover 5 and the isolation sleeve 4. The second sealing ring is made of polytetrafluoroethylene, which improves the sealing effect.

[0034] A front bearing 12 is provided between the pump cover 5 and the pump shaft 2, and a rear bearing 13 is provided between the isolation sleeve 4 and the pump shaft 2. The front bearing reduces wear on the pump cover, and the rear bearing reduces wear on the isolation sleeve. The isolation sleeve is made of reinforced carbon fiber.

[0035] The pump body 1 is provided with an impeller cavity 14, the impeller 3 is located in the impeller cavity 14, the impeller cavity 14 is provided with an inlet pipe 15 and an outlet pipe 16, and both the inlet pipe 15 and the outlet pipe 16 are provided with flanges.

[0036] The pump body 1 is made of fluoroplastic, corrosion-resistant stainless steel, corundum ceramic, or PTFE graphite. In this embodiment, the pump body is made of fluoroplastic. The pump cover and impeller are also integrally sintered and pressed using metal inserts encased in fluoroplastic.

[0037] In one embodiment, the magnetic self-priming pump is also equipped with a pump protector that automatically disconnects the power supply when the pump is running dry or overloaded, so as to protect the pump internal components or motor from damage caused by pump running dry or motor overload.

[0038] Working principle: This self-priming magnetic centrifugal pump has a front pump cover at the front end of the pump body, a flange at the top of the pump body, a pump cover at the rear end of the pump body via a first sealing ring, a connecting bracket at the rear end of the pump cover, an impeller and a fastening nut at the end of the pump shaft, a sliding bearing and an inner rotor assembly mounted on the pump shaft, and an outer magnetic assembly mounted on the motor drive shaft. It effectively isolates itself from the magnetic transmission system through an isolation sleeve, and utilizes magnetic coupling technology to transmit power and achieve media transport.

[0039] The magnetic self-priming pump consists of a split pump body, an elevated inlet bend, and an inlet check valve. The inner body of the pump body is a vortex chamber, and the lower part of the cavity formed by the inner and outer bodies is a liquid storage chamber, while the upper part is a gas-liquid separation chamber. Reflux holes are opened in the lower part of the liquid storage chamber and on the wall of the vortex chamber.

[0040] The gas-liquid mixture discharged from the pump outlet is separated in the gas-liquid separation chamber. The gas rises and is discharged through the exhaust valve, while the liquid flows back to the storage chamber and then back to the impeller outlet through the return hole. It mixes again with the gas at the impeller outlet and is then discharged back into the gas-liquid separation chamber. This process repeats, achieving self-priming. After the pump is running normally, the exhaust valve is closed. Due to the small pressure difference between the volute chamber and the storage chamber, leakage through the return hole is minimal. After the magnetic self-priming pump starts, under the action of centrifugal force, the remaining liquid in the suction chamber and the air in the inlet pipe are stirred into a gas-liquid mixture by the impeller. This mixture enters the gas-liquid separation chamber through the volute. As the speed decreases, gas-liquid separation occurs. Normally, a certain amount of water is stored in the pump. After the pump starts, due to the rotation of the impeller, the air and water in the suction pipe are fully mixed and discharged into the gas-liquid separation chamber.

[0041] The gas in the upper part of the gas-liquid separation chamber is discharged, and the liquid in the lower part returns to the impeller and mixes with the gas in the suction pipe until all the gas in the pump and suction pipe is discharged, completing self-priming and realizing normal pumping.

[0042] Air is discharged from the outlet of the magnetic self-priming pump, and liquid returns to the pump through the return water hole. After multiple cycles, the air in the inlet pipe is purged, and a certain vacuum is formed inside the pump, achieving self-priming and meeting the requirement of no leakage. Practice has proven that this magnetic self-priming pump has both the function of a magnetic pump and the self-priming function, eliminating the need for a foot valve and priming water. The self-priming height can reach 4m. It can be widely used in industrial and mining washing, equipment cooling, petroleum, chemical, pharmaceutical, electroplating, printing and dyeing, food, scientific research and other units to pump acids, alkalis, oils, as well as precious liquids, toxic liquids, volatile liquids, and circulating water equipment, especially for pumping easily leaking, flammable and explosive liquids.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A magnetic self-priming pump structure, characterized in that, include: The pump body has a pump shaft inside, an impeller is provided at one end of the pump shaft, and an isolation sleeve is provided at the other end of the pump shaft. The isolation sleeve abuts against the pump cover on the pump body. An inner magnetic rotor is provided between the impeller and the isolation sleeve and passes through the pump shaft. An electric motor is provided at one end of the pump body, and an external magnetic rotor is provided on the drive shaft of the motor. A connecting frame, one end of which is connected to the pump body and the other end of which is connected to the motor, with the external magnetic rotor located inside the connecting frame.

2. The magnetic self-priming pump structure according to claim 1, characterized in that, A first sealing ring is provided between the pump cover and the pump body.

3. The magnetic self-priming pump structure according to claim 1, characterized in that, A second sealing ring is provided between the pump cover and the isolation sleeve.

4. The magnetic self-priming pump structure according to claim 1, characterized in that, A front bearing is provided between the pump cover and the pump shaft, and a rear bearing is provided between the isolation sleeve and the pump shaft.

5. The magnetic self-priming pump structure according to claim 1, characterized in that, The pump body is provided with an impeller cavity, the impeller is located in the impeller cavity, and an inlet pipe and an outlet pipe are provided on the impeller cavity. Both the inlet pipe and the outlet pipe are provided with flanges.

6. The magnetic self-priming pump structure according to claim 1, characterized in that, The pump body is made of fluoroplastics, corrosion-resistant stainless steel, corundum ceramics, or PTFE graphite.

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