High pressure magnetic centrifugal pump

Abstract

The utility model relates to a high pressure magnetic centrifugal pump belongs to liquid pump technical field, including high pressure magnetic centrifugal pump body, vibration detection switch, solenoid valve still have control circuit, vibration detection switch includes cylinder, quicksilver, contact piece, adjusting lever, two contact piece interval distance fixed mounting adjusting lever lower part, quicksilver is located in the lower end in cylinder, adjusting lever installs in cylinder upper end, two solenoid valve one end respectively with high pressure magnetic centrifugal pump body's volute inlet pipe, outlet pipe fixed connection, control circuit installs in control box, vibration detection switch fixed mounting control box upper end. This new type closes power switch, can actively close volute inlet pipe and outlet pipe, make volute keep liquid, need not to add liquid to volute before next time use, bring convenience to staff, improve work efficiency, when various reasons, cause high pressure magnetic centrifugal pump body vibration intensity too big can in time through alarm sound prompt staff, prevent the fault amplification.

Description

Technical Field

[0001] This utility model relates to the field of liquid pump equipment technology, in particular Background Technology

[0002] High-pressure magnetic centrifugal pumps are a type of pump based on magnetic drive technology. Specifically, a high-pressure magnetic centrifugal pump consists of a motor, an outer magnetic rotor, and an inner magnetic rotor. When the motor starts and drives the outer magnetic rotor to rotate, the magnetic field of the outer magnetic rotor can penetrate the air gap and non-magnetic materials, driving the inner magnetic rotor, which is connected to the impeller inside the volute, to rotate synchronously. This, in turn, causes the impeller, connected to the shaft of the inner magnetic rotor, to rotate, pumping the liquid out through the outlet pipe. This design achieves contactless power transmission, transforming components that originally required dynamic seals into static seals, greatly improving sealing performance and preventing liquid leakage caused by sealing problems. Compared with traditional mechanical seal pumps, high-pressure magnetic centrifugal pumps have significant advantages such as leak-free operation, long service life, high efficiency, and high safety. They have a wide range of applications and are suitable for handling various liquids requiring high pressure.

[0003] With the advancement of industrial technology, the functions of high-pressure magnetic centrifugal pumps have also been developed. For example, the authorized patent of my country Patent No. "202420274289.5", entitled "High-Pressure Magnetic Centrifugal Pump", states that it "solves the problems of stainless steel magnetic pumps being not corrosion resistant, fluoroplastic magnetic pumps being unable to withstand high temperature and high pressure, and most magnetic centrifugal pumps being inconvenient to move and use, as well as the lack of a certain protective structure." As can be seen above, although the patent has achieved the invention purpose stated above, it still has the following technical disadvantages due to structural limitations. (1) It does not have a working performance monitoring function. Specifically, when the equipment vibrates too much due to various reasons (such as excessive vibration due to bearing damage), it cannot promptly alert the user, which poses a risk of the fault escalating (such as bearing damage, rotor and stator collision damage, etc.). (2) Especially when used for outdoor water pumping operations, water needs to be poured into the volute each time before the equipment can pump water normally (so that the impeller inside the volute rotates and a vacuum is formed inside the volute, which is beneficial for subsequent water pumping operations). This will cause inconvenience to the staff and is not conducive to improving work efficiency. Utility Model Content

[0004] To overcome the drawbacks of existing high-pressure magnetic centrifugal pumps, which are limited by their structure and described in the background art, this utility model provides a high-pressure magnetic centrifugal pump body that, under the combined action of related structures, can actively close the inlet and outlet pipes of the volute after shutdown, thus retaining liquid inside the volute. This eliminates the need to add liquid to the volute before the next use, providing convenience to workers and improving work efficiency. Furthermore, it can monitor the vibration of the equipment in real time during operation and promptly alert workers when excessive vibration occurs due to various malfunctions, preventing the escalation of the fault.

[0005] The technical solution adopted by this utility model to solve its technical problem is: The system includes a vibration detection switch, a solenoid valve, and a control circuit. The vibration detection switch comprises a cylinder, mercury, contact plates, and an adjusting rod. The upper end of the cylinder has a threaded hole, and the outer side of the adjusting rod has external threads. There are at least two metal contact plates, which are fixedly installed at a distance from each other on the lower part of the adjusting rod. The mercury is located at the lower end of the cylinder, and the adjusting rod is installed at the upper end of the cylinder. There are at least two solenoid valves, one end of which is fixedly connected to the inlet pipe and outlet pipe of the volute of the high-pressure magnetic centrifugal pump body, respectively. The other end of one solenoid valve is connected to the liquid-using end via a pipe, and the other end of the other solenoid valve is connected to the liquid-inlet end via a pipe. The control circuit is installed in a control box, and the vibration detection switch is fixedly installed on the upper end of the control box. The control power output terminal of the control circuit is electrically connected to the power input terminal of the two solenoid valves, and the two contact plates are electrically connected to the two signal input terminals of the control circuit.

[0006] Furthermore, the two solenoid valves are normally closed solenoid valves.

[0007] Furthermore, the distance between the upper end of the mercury surface and the lower end of the two contact pieces.

[0008] Furthermore, the mercury can be replaced by any conductive liquid.

[0009] Furthermore, the control circuit includes a time-controlled switch, a relay, and an alarm that are electrically connected. The positive power input terminal of the time-controlled switch is connected to the control power input terminal of the relay, the negative power input terminal of the time-controlled switch is connected to the negative power input terminal of the relay and the negative power input terminal of the alarm, and the normally open contact terminal of the relay is connected to the positive power input terminal of the alarm.

[0010] Compared with the prior art, the advantages of this utility model are: (1) This utility model is based on the high-pressure magnetic centrifugal pump body and has all the functions of a common high-pressure magnetic centrifugal pump. When working, under the action of the control circuit and the solenoid valve, after the staff turns off the main power switch, the high-pressure magnetic centrifugal pump body can actively close the inlet pipe and outlet pipe of the volute after stopping, so that liquid is retained in the volute. Before the next use, it is not necessary to add liquid to the volute, which brings convenience to the staff and improves the work efficiency accordingly; (2) Under the action of the vibration detection switch and the control circuit, the vibration of the high-pressure magnetic centrifugal pump body can be monitored in real time during operation. When the vibration intensity of the high-pressure magnetic centrifugal pump body is too large due to various faults, the alarm can sound to remind the staff in time, which effectively prevents the fault from escalating. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a partial planar structural schematic diagram of the present invention.

[0014] Figure 3 This is the circuit diagram of this utility model. Detailed Implementation

[0015] A high-pressure magnetic centrifugal pump includes a high-pressure magnetic centrifugal pump body 1, a power module A1, a power switch S1, a vibration detection switch 2, solenoid valves DC1 and DC2, and a control circuit 3. The vibration detection switch includes a cylinder 21, mercury 22 (or any conductive liquid), contact pieces 23, and an adjusting rod 24. The upper middle part of the cylinder 21 has a threaded hole, and the outer side of the adjusting rod 24 has external threads. There are two copper metal contact pieces 23, which are fixedly installed at a distance from each other on the lower middle part of the adjusting rod 24. The wires connected to the two contact pieces 23 are sealed and led out from the upper end of the adjusting rod 24. The mercury 22 is located inside the lower end of the cylinder 21. The adjusting rod is screwed into the internal threaded hole at the upper end of the cylinder body 21 via external thread, and the adjusting rod is installed on the outside of the upper end of the cylinder body; there are at least two solenoid valves DC1 and DC2, one end of each solenoid valve DC1 and DC2 is fixedly connected to the inlet pipe and outlet pipe of the volute of the high-pressure magnetic centrifugal pump body 1 via thread, the other end of one solenoid valve DC1 is connected to the liquid-using end via a pipe, and the other end of the other solenoid valve DC2 is connected to the liquid-inlet end via a pipe; the power module A1, the power switch S1, and the control circuit 3 are installed in the control box 101 of the high-pressure magnetic centrifugal pump body 1, and there is an opening in the middle of the upper end of the control box 101, and the cylinder body 21 is fixedly installed in the middle of the outer side of the opening.

[0016] Figure 1, 2 As shown in Figure 3, the two solenoid valves DC1 and DC2 are normally closed solenoid valves. The distance between the upper end of the mercury 22 liquid level and the lower end of the two contact pieces 23 is [not specified]. The control circuit includes a time switch A2, a relay K, and an alarm BX connected via circuit board wiring. The positive power input terminal 1 of the time switch A2 is connected to the control power input terminal of the relay K. The negative power input terminal 2 of the time switch A2 is connected to the negative power input terminals of the relay K and the alarm BX. The normally open contact terminal of the relay K is connected to the positive power input terminal of the alarm BX. One end of power switch S1 is connected to one pole of the 220V power supply via a wire. The other end of power switch S1, the other pole of the 220V AC power supply, and the power input terminals 1 and 2 of power module A1, as well as the power input terminal of the high-voltage magnetic centrifugal pump body 1 (M), are connected via wires. The power output terminals 3 and 4 of power module A1 are connected to the power input terminals 1 and 2 of the time control switch A2 of the control circuit via wires. The control power output terminal of the control circuit, the time control switch A2, and the two solenoid valves DC1 and DC2 (the two solenoid valves DC1 and DC2 are in...) Figure 3 The power input terminals marked DCN are connected by wires, and the two contact pieces 23(T) and the two signal input terminals of the control circuit, the control power input terminal of relay K and the positive power input terminal of relay K are connected by wires.

[0017] Figure 1 , 2As shown in Figure 3, this new type of pump, based on the high-pressure magnetic centrifugal pump body M, possesses all the functions of a conventional high-pressure magnetic centrifugal pump. When its motor starts and drives the outer magnetic rotor to rotate, the magnetic field of the outer magnetic rotor can penetrate the air gap and non-magnetic materials, driving the inner magnetic rotor, which is connected to the impeller inside the volute, to rotate synchronously. Consequently, the impeller, connected to the shaft of the inner magnetic rotor, rotates, pumping the liquid out through the outlet pipe. In this new type of pump, after the power switch S1 is turned on, AC 220V power enters the power input terminal of the power module A1 (and simultaneously enters the power input terminal of the high-pressure magnetic centrifugal pump body M, energizing the high-pressure magnetic centrifugal pump body M). The stable DC 12V power output from pins 3 and 4 of the power module A1 enters the power input terminal of the control circuit. After the high-pressure magnetic centrifugal pump body M is energized, in the initial state, its motor drives the impeller to rotate. At 2-second intervals, pins 3 and 4 of the timer switch A2 output power to the power input terminals of the two solenoid valves DC1 and DC2. The solenoid valves DC1 and DC2 are energized and open. Thus, the rotating impeller draws liquid from the inlet (e.g., water in a tank) and pumps it out through the outlet pipe. The 2-second delay in this application to control the opening of the solenoid valves DC1 and DC2 is because after the high-pressure magnetic centrifugal pump body M is initially energized... The motor does not immediately reach full load (its speed is relatively slow), and the vacuum generated by the relatively low impeller speed may be insufficient. Liquid inside the volute may leak out to the inlet, preventing normal pumping. After a 2-second delay, the motor of the high-pressure magnetic centrifugal pump body M drives the impeller to full power. Therefore, after the two solenoid valves DC1 and DC2 open, the liquid inside the volute can be effectively pumped out, creating a vacuum. Consequently, the liquid at the inlet is continuously pumped out through the outlet of the volute of the high-pressure magnetic centrifugal pump body M. When the high-pressure magnetic centrifugal pump body M needs to be stopped, the operator turns off the power switch. The high-pressure magnetic centrifugal pump body M and solenoid valves DC1 and DC2 will simultaneously lose power, leaving the liquid inside the volute, ready for the next operation.

[0018] Figure 1 , 2 As shown in Figure 3, when the high-pressure magnetic centrifugal pump body M operates smoothly and generates relatively small vibrations, the mercury in the vibration detection switch will not submerge the two contact pieces 23(T), the relay K will not be energized, and the alarm BX will not be energized and sound, indicating that the high-pressure magnetic centrifugal pump body M is operating smoothly. When the high-pressure magnetic centrifugal pump body M vibrates excessively due to various reasons (for example, damaged motor bearings or excessive vibration), the mercury in the vibration detection switch will submerge the two contact pieces 23(T), the relay K will be energized and close the control power input terminal and the normally open contact terminal, and then the alarm BX will be energized and sound, indicating that the high-pressure magnetic centrifugal pump body M is operating unstablely. After hearing the sound, the staff can promptly find out the cause of the vibration and carry out maintenance, preventing the fault from escalating.

[0019] Figure 1 ,2 As shown in Figure 3, under the control of the control circuit and solenoid valve, when the operator turns off the main power switch, the high-pressure magnetic centrifugal pump body can automatically close the inlet and outlet pipes of the volute after stopping, so that liquid is retained in the volute. This eliminates the need to add liquid to the volute before the next use, providing convenience to the operator and improving work efficiency. Furthermore, under the coordinated action of the vibration detection switch and control circuit, the vibration of the high-pressure magnetic centrifugal pump body can be monitored in real time during operation. If the vibration intensity of the high-pressure magnetic centrifugal pump body becomes excessive due to various faults, an alarm can be sounded to alert the operator, effectively preventing the escalation of the fault. Figure 3 In this circuit, power module A1 is a 220V AC to 12V DC power module (2KW); high-voltage magnetic centrifugal pump body M has a power of 3KW (operating voltage 220V, or a 380V high-voltage magnetic centrifugal pump body M can be used); relay K is DC12V; solenoid valves DC1 and DC2 are normally closed solenoid valves with a power of 2W; alarm BX is an FM12V active continuous audible alarm; time control switch A2 is a KG316T time controller with two power input terminals, two power output terminals, and seven setting buttons. By adjusting the seven setting buttons, the output time of the two power output terminals can be set. In this application, during production, when the high-pressure magnetic centrifugal pump body is working, technicians rotate the adjusting rod 24 left or right respectively. The adjusting rod 24 moves up or down along the cylinder, thereby adjusting the distance between the contact plate 23 and the mercury surface. After adjusting it to the point where the alarm sounds, the staff adjusts the adjusting rod upwards a little, and the alarm stops sounding. In subsequent practical applications, when the high-pressure magnetic centrifugal pump body vibrates and sounds, the alarm will sound (end users can also adjust it themselves).

[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0021] Furthermore, it should be understood that although this specification describes the embodiments, the embodiments do not necessarily contain only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-pressure magnetic centrifugal pump, comprising a high-pressure magnetic centrifugal pump body, a vibration detection switch, and a solenoid valve, characterized in that, It also includes a control circuit; the vibration detection switch includes a cylinder, mercury, contact pieces, and an adjusting rod. The upper end of the cylinder has a threaded hole, and the outer side of the adjusting rod has an external thread. There are at least two metal contact pieces, which are fixedly installed at a distance from each other on the lower part of the adjusting rod. The mercury is located at the lower end of the cylinder, and the adjusting rod is installed at the upper end of the cylinder. There are at least two solenoid valves, one end of which is fixedly connected to the inlet pipe and outlet pipe of the volute of the high-pressure magnetic centrifugal pump body, respectively. The other end of one solenoid valve is connected to the liquid-using end via a pipe, and the other end of the other solenoid valve is connected to the liquid-inlet end via a pipe. The control circuit is installed in a control box, and the vibration detection switch is fixedly installed on the upper end of the control box. The control power output terminal of the control circuit is electrically connected to the power input terminal of the two solenoid valves, and the two contact pieces are electrically connected to the two signal input terminals of the control circuit.

2. The high-pressure magnetic centrifugal pump according to claim 1, characterized in that, Both solenoid valves are normally closed solenoid valves.

3. A high-pressure magnetic centrifugal pump according to claim 1, characterized in that, The distance between the upper end of the mercury surface and the lower end of the two contact pads.

4. A high-pressure magnetic centrifugal pump according to claim 1, characterized in that, Mercury can also be replaced by any conductive liquid.

5. A high-pressure magnetic centrifugal pump according to claim 1, characterized in that, The control circuit includes a time switch, a relay, and an alarm that are electrically connected. The positive power input terminal of the time switch is connected to the control power input terminal of the relay, the negative power input terminal of the time switch is connected to the negative power input terminal of the relay and the negative power input terminal of the alarm, and the normally open contact terminal of the relay is connected to the positive power input terminal of the alarm.

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