Vertical self-suction magnetic force pump

Abstract

The utility model relates to a kind of vertical self-suction magnetic force pump, comprising: pump body;Pump cover is arranged on the upper end of pump body, pump cover and pump body form pump cavity, the liquid inlet of pump body is provided with liquid storage chamber, the liquid outlet of pump body is provided with gas-liquid separation chamber, inlet pipe is set on the liquid storage chamber, one-way valve is set on the inlet pipe;With the side of pump body away from pump cover Enclosing isolation cavity is formed by isolation sleeve, isolation cavity is in the gas-liquid separation chamber, one-way valve is at least in the upper end of the bottom of isolation sleeve, to ensure that pump cavity and isolation cavity are filled with liquid;Pump shaft is penetrated through pump cavity and isolation cavity;Impeller is located in pump cavity and is arranged at one end of pump shaft;Inner rotor is located in isolation cavity and is sleeved on pump shaft;Outer rotor is located outside isolation cavity and is oppositely arranged with inner rotor.The utility model provides a kind of vertical self-suction magnetic force pump, the magnetic force pump uses magnetic coupling principle, there is no dynamic seal on pump shaft, safe and reliable, the service life of pump is greatly improved, and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of magnetic pump technology, specifically to a vertical self-priming magnetic pump. Background Technology

[0002] Pumps are classified into two operating conditions: suction pumps and backflow pumps. Generally, suction pumps include submersible pumps, submersible pumps, and self-priming pumps. Submersible pumps are not suitable for use in many environments due to their corrosion resistance and explosion-proof requirements. Submersible pumps are also listed as obsolete by the Ministry of Emergency Management because of their deep submersion depth and the easy wear of their submersible drive shafts. Therefore, self-priming pumps have become the most suitable type of pump for suction pump operation.

[0003] Traditional self-priming pumps are mostly horizontal, occupying a large space, and their self-priming capacity is generally only 3-4m. They cannot be used in environments with narrow spaces and high suction capacity. The shaft seal of horizontal self-priming pumps uses a mechanical seal, which often suffers from problems such as wear and dry burning due to poor venting, resulting in a short service life and requiring frequent maintenance. Utility Model Content

[0004] The purpose of this invention is to overcome at least one of the defects of the prior art and provide a vertical self-priming magnetic pump.

[0005] The objective of this utility model can be achieved through the following technical solutions: A vertical self-priming magnetic pump, comprising: Pump body; A pump cover is provided at the upper end of the pump body, and the pump cover and the pump body together form a pump cavity. The pump body has a liquid storage cavity at the liquid inlet and a gas-liquid separation cavity at the liquid outlet. An inlet pipe is provided on the liquid storage cavity and a one-way valve is provided on the inlet pipe. An isolation sleeve is formed by enclosing the side of the pump body opposite to the pump cover to form an isolation chamber. The isolation chamber is located inside the gas-liquid separation chamber. The one-way valve is located at least at the upper end of the bottom of the isolation sleeve to ensure that the pump chamber and the isolation chamber are filled with liquid. A pump shaft passing through the pump chamber and the isolation chamber; An impeller located inside the pump chamber and disposed at one end of the pump shaft; An inner rotor located within the isolation chamber and sleeved on the pump shaft; An outer rotor located outside the isolation cavity and positioned opposite to the inner rotor.

[0006] Furthermore, a tuning fork level switch is also installed on the inlet pipe.

[0007] Furthermore, the liquid storage chamber is provided with an outlet pipe connected thereto, and a pressure sensor is provided on the outlet pipe.

[0008] Furthermore, a bearing assembly is provided on the pump shaft, the bearing assembly including a pair of bushings sleeved on the pump shaft, a retaining sleeve sleeved on the pump shaft and located between the pair of bushings, and a pair of bearing sleeves disposed around the pair of bushings.

[0009] Furthermore, a pair of thrust rings are also fitted on the pump shaft, and the pair of thrust rings are located on both sides of the pair of bearing sleeves.

[0010] Furthermore, an impeller nut is provided between the pump shaft and the impeller for connecting the two.

[0011] Furthermore, a first sealing gasket is provided between the pump cover and the pump body; a second sealing gasket is provided between the pump body and the isolation sleeve.

[0012] Furthermore, the magnetic pump also includes a connecting frame, one end of which abuts against the isolation sleeve, and the other end of which abuts against the pump body.

[0013] Furthermore, a third sealing gasket is provided at the point where the connecting frame abuts against the isolation sleeve, and a fourth sealing gasket is provided at the point where the connecting frame abuts against the pump body.

[0014] Furthermore, the magnetic pump also includes a motor, which is mounted on the upper end of the connecting frame.

[0015] Furthermore, the liquid storage chamber and the gas-liquid separation chamber abut against each other, and a section plate is provided on the abutting surface to separate the two. The pump body and the connecting frame are both located in the gas-liquid separation chamber.

[0016] Compared with the prior art, the present invention has the following advantages: (1) The magnetic pump provided by this utility model adopts the principle of magnetic coupling, and transmits torque through the magnetic attraction between the inner and outer rotors. The outer rotor is connected to the motor and the inner rotor is connected to the pump shaft. There is no need for the physical rigid connection of the traditional mechanical shaft. Therefore, the pump shaft does not need to penetrate the isolation cavity to realize power transmission. Structurally, it eliminates the traditional design of the pump shaft penetrating the seal, fundamentally solving the problem of easy leakage of dynamic seals, and ensuring safe and reliable operation. This design greatly reduces the risk of failure caused by seal failure, significantly extends the service life of the pump, and reduces the frequency and cost of maintenance.

[0017] (2) After the magnetic pump provided by this utility model is running, the motor drives the outer rotor to rotate at high speed. The outer rotor drives the inner rotor inside the pump to rotate synchronously. The impeller and the inner rotor are coaxial. Thus, the high-speed rotation of the impeller pressurizes the liquid and enters the gas-liquid separation chamber through the pump body outlet. The gas is located at the upper part of the gas-liquid separation chamber because of its low density. Then it is discharged through the outlet pipe, while the liquid part flows back to the storage chamber and repeats the same cycle until the gas in the inlet pipe is completely separated. Then the pump sucks up the liquid below the pump and completes the self-priming function of the pump.

[0018] (3) The magnetic pump provided by this utility model has a large volume in the inlet liquid storage chamber and the outlet gas-liquid separation chamber. This structural feature gives the pump stronger self-priming performance and efficient gas removal capability, which can quickly establish a stable liquid suction condition, greatly shorten the liquid suction start time, and improve the operating efficiency. It is especially suitable for scenarios that require frequent start-stop or transport of gas-containing liquids.

[0019] (4) The inlet check valve of the magnetic pump provided by this utility model is installed at a height not lower than the bottom upper end of the isolation sleeve, ensuring that the pump chamber and the isolation chamber are always filled with liquid, providing a basic guarantee for pump operation; at the same time, the tuning fork liquid level switch equipped in the inlet pipe and the pressure sensor in the outlet pipe form a dual monitoring mechanism, which can monitor the liquid level and pressure parameters in real time, effectively avoid the pump body running dry due to lack of liquid, greatly reduce the risk of pump damage, and further extend the service life. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a vertical self-priming magnetic pump in an embodiment; Figure 2 for Figure 1 A partial view in the middle; The numbers in the diagram indicate: 1-Inlet pipe; 2-Check valve; 3-Pump body; 4-Impeller; 5-Pump cover; 6-Pump shaft; 7-Shaft sleeve; 8-Side sleeve; 9-Bearing sleeve; 10-Thrust ring; 11-Inner rotor; 12-Isolation sleeve; 13-Outer rotor; 14-Connecting frame; 15-Motor; 16-Outlet pipe; 101-First sealing gasket; 102-Second sealing gasket; 103-Third sealing gasket; 104-Fourth sealing gasket; A-Tuning fork level switch; B-Pressure sensor; a-Liquid storage chamber; b-Gas-liquid separation chamber. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0022] Example This embodiment provides a vertical self-priming magnetic pump; the specific structure is shown below. Figure 1-2 It includes pump body 3, pump cover 5, isolation sleeve 12, pump shaft 6, impeller 4, inner rotor 11, and outer rotor 13; The pump cover 5 is located on the upper end of the pump body 3. The pump cover 5 and the pump body 3 together form a pump cavity. The pump body 3 has a liquid storage chamber a at its inlet and a gas-liquid separation chamber b at its outlet. An inlet pipe 1 is installed on the liquid storage chamber a, and a one-way valve 2 is installed on the inlet pipe 1. The one-way valve 2 can effectively retain the liquid in the pump cavity and the isolation chamber, significantly improving the self-priming start-up efficiency. At the same time, the one-way valve 2 is positioned higher than the bottom of the isolation sleeve 12 to ensure that the key transmission and conveying cavities are always filled with liquid, providing structural protection for the stable operation of the self-priming function. The isolation sleeve 12 and the pump body 3 on the side away from the pump cover 5 enclose each other to form an isolation chamber. The isolation chamber is located in the gas-liquid separation chamber b. The one-way valve 2 is located at least at the upper end of the bottom of the isolation sleeve 12 to ensure that the pump chamber and the isolation chamber are filled with liquid. The pump shaft 6 passes through the pump chamber and the isolation chamber; the impeller 4 is located in the pump chamber and is disposed at one end of the pump shaft 6; the inner rotor 11 is located in the isolation chamber and is sleeved on the pump shaft 6; the outer rotor 13 is located outside the isolation chamber and is disposed opposite to the inner rotor 11.

[0023] In this embodiment, a tuning fork level switch A is also provided on the inlet pipe 1. The tuning fork level switch A can monitor the liquid level at the suction end in real time and promptly report abnormal situations such as insufficient liquid, so as to avoid component wear caused by the pump running dry.

[0024] In this embodiment, the liquid storage chamber a is provided with an outlet pipe 16 connected thereto, and a pressure sensor B is provided on the outlet pipe 16. The pressure sensor B can accurately collect the pressure data in the chamber, which makes it easy for the operator to grasp the operating load of the pump body, realize real-time monitoring and timely control of the working status of the pump body, and reduce the risk of failure.

[0025] In this embodiment, a bearing assembly is provided on the pump shaft 6. The bearing assembly includes a pair of bushings 7 sleeved on the pump shaft 6, a retaining sleeve 8 sleeved on the pump shaft 6 and located between the pair of bushings 7, and a pair of bearing sleeves 9 disposed around the pair of bushings 7. A pair of thrust rings 10 are also sleeved on the pump shaft 6. The pair of thrust rings 10 are located on both sides of the pair of bearing sleeves 9, which can effectively disperse the radial and axial forces during the operation of the pump shaft, reduce shaft shaking and wear, improve the stability of the shaft system operation, extend the service life of the bearing assembly, and reduce pump maintenance costs.

[0026] In this embodiment, an impeller nut is provided between the pump shaft 6 and the impeller 4 to connect the two.

[0027] In this embodiment, a first sealing gasket 101 is provided between the pump cover 5 and the pump body 3; a second sealing gasket 102 is provided between the pump body 3 and the isolation sleeve 12.

[0028] In this embodiment, the magnetic pump further includes a connecting frame 14, one end of which abuts against the isolation sleeve 12, and the other end of which abuts against the pump body 3.

[0029] In this embodiment, a third sealing gasket 103 is provided at the point where the connecting frame 14 abuts against the isolation sleeve 12, and a fourth sealing gasket 104 is provided at the point where the connecting frame 14 abuts against the pump body 3.

[0030] In this embodiment, the magnetic pump further includes a motor 15, which is disposed on the upper end of the connecting frame 14.

[0031] In this embodiment, the liquid storage chamber a and the gas-liquid separation chamber b abut against each other, and a section plate is provided at their abutting surfaces to separate them. The pump body 3 and the connecting frame 14 are both located within the gas-liquid separation chamber b. It can be seen that both the liquid storage chamber a and the gas-liquid separation chamber b have large volumes, giving the pump strong self-priming and gas removal capabilities, and significantly shortening the suction time.

[0032] Working principle: In operation, the pump is first filled with liquid until the liquid level is higher than the height of the inlet check valve 2. After the pump starts running, the motor 15 drives the outer rotor 13 to rotate at high speed. The outer rotor 13 drives the inner rotor 11 inside the pump to rotate synchronously. The impeller 4 and the inner rotor 11 are coaxial. Thus, the high-speed rotation of the impeller 4 pressurizes the liquid and enters the gas-liquid separation chamber b through the pump outlet. The gas, due to its lower density, is located at the top of the gas-liquid separation chamber b and is then discharged through the outlet pipe 16. The liquid part flows back to the storage chamber a, and the same cycle is repeated until the gas in the inlet pipe 1 is completely separated. Then, the pump draws up the liquid below the pump level, completing the pump's self-priming function. Moreover, in this embodiment, a check valve 2 is installed in the pump inlet pipe 1. The installation height of the check valve 2 is higher than the bottom of the isolation sleeve 12, so that the liquid entering the pump chamber and the isolation chamber can completely fill the pump, ensuring that the isolation sleeve 12, bearing sleeve 9, etc. will not be burned due to insufficient liquid. The pump inlet is also equipped with a tuning fork level switch A, which can be interlocked with the field control equipment to ensure that the pump is always in a liquid state. The outlet pressure sensor B can adjust the opening of the outlet valve according to the operating conditions, and can also interlock to stop the pump in time when it cavitation occurs, thus protecting the pump and extending its service life.

[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A vertical self-priming magnetic pump, characterized in that, include: Pump body (3); A pump cover (5) is provided on the upper end of the pump body (3). The pump cover (5) and the pump body (3) together form a pump cavity. The inlet of the pump body (3) is provided with a storage cavity (a). The outlet of the pump body (3) is provided with a gas-liquid separation cavity (b). An inlet pipe (1) is provided on the storage cavity (a). A one-way valve (2) is provided on the inlet pipe (1). An isolation sleeve (12) is formed by enclosing the side of the pump body (3) away from the pump cover (5) to form an isolation chamber. The isolation chamber is located inside the gas-liquid separation chamber (b). The one-way valve (2) is located at least at the upper end of the bottom of the isolation sleeve (12) to ensure that the pump chamber and the isolation chamber are filled with liquid. Pump shaft (6) passing through the pump chamber and the isolation chamber; An impeller (4) is located inside the pump chamber and is disposed at one end of the pump shaft (6); An inner rotor (11) is located inside the isolation chamber and sleeved on the pump shaft (6). An outer rotor (13) is located outside the isolation cavity and is disposed opposite to the inner rotor (11).

2. A vertical self-priming magnetic pump according to claim 1, characterized in that, The inlet pipe (1) is also equipped with a tuning fork level switch (A).

3. A vertical self-priming magnetic pump according to claim 1, characterized in that, The liquid storage chamber (a) is provided with an outlet pipe (16) connected thereto, and a pressure sensor (B) is provided on the outlet pipe (16).

4. A vertical self-priming magnetic pump according to claim 1, characterized in that, The pump shaft (6) is provided with a bearing assembly, which includes a pair of bushings (7) sleeved on the pump shaft (6), a retainer (8) sleeved on the pump shaft (6) and located between the pair of bushings (7), and a pair of bearing sleeves (9) disposed around the pair of bushings (7).

5. A vertical self-priming magnetic pump according to claim 4, characterized in that, A pair of thrust rings (10) are also fitted on the pump shaft (6), and the pair of thrust rings (10) are located on both sides of the pair of bearing sleeves (9).

6. A vertical self-priming magnetic pump according to claim 1, characterized in that, An impeller nut is provided between the pump shaft (6) and the impeller (4) for connecting the two.

7. A vertical self-priming magnetic pump according to claim 1, characterized in that, A first sealing gasket (101) is provided between the pump cover (5) and the pump body (3); a second sealing gasket (102) is provided between the pump body (3) and the isolation sleeve (12).

8. A vertical self-priming magnetic pump according to claim 1, characterized in that, The magnetic pump also includes a connecting frame (14), one end of which abuts against the isolation sleeve (12), and the other end of which abuts against the pump body (3).

9. A vertical self-priming magnetic pump according to claim 8, characterized in that, A third sealing gasket (103) is provided at the point where the connecting frame (14) abuts against the isolation sleeve (12), and a fourth sealing gasket (104) is provided at the point where the connecting frame (14) abuts against the pump body (3).

10. A vertical self-priming magnetic pump according to claim 8, characterized in that, The liquid storage chamber (a) and the gas-liquid separation chamber (b) are abutted together, and a section plate is provided on the abutting surface to separate the two. The pump body (3) and the connecting frame (14) are both located in the gas-liquid separation chamber (b).

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