阅读说明：本技术 一种湿绕组电机主泵的维护装置及其使用方法 (Maintenance device for wet winding motor main pump and use method thereof ) 是由 田源 郭述志 黄明 王炳舜 连永亮 沈郁昕 沈红 廖浚安 屈甘雨 李嘉桐 李林 于 2021-09-28 设计创作，主要内容包括：本发明公开了一种湿绕组电机主泵的维护装置及其使用方法,其属于核动力工程技术领域,湿绕组电机主泵的维护装置包括溶液制备箱、保养试剂储液罐、循环管路、输液管路和监测管路。溶液制备箱设有第一进液口、第二进液口、循环出液口和循环回液口；保养试剂储液罐能够与所述第二进液口连通；循环管路一端与循环出液口连通,另一端能够与循环回液口连通,循环管路上连接有离心泵和第一监测器；输液管路与循环管路连接,能够将溶液制备箱内的液体自湿绕组电机主泵底部的注液口注入湿绕组电机主泵内；监测管路,能够与湿绕组电机主泵顶部的排液口连通,监测管路上连接有第二监测器。本发明能够自动向湿绕组电机主泵内注入均匀的保养溶液。(The invention discloses a maintenance device for a main pump of a wet winding motor and a use method thereof, belonging to the technical field of nuclear power engineering. The solution preparation box is provided with a first liquid inlet, a second liquid inlet, a circulating liquid outlet and a circulating liquid return port; the maintenance reagent liquid storage tank can be communicated with the second liquid inlet; one end of the circulating pipeline is communicated with the circulating liquid outlet, the other end of the circulating pipeline can be communicated with the circulating liquid return port, and the circulating pipeline is connected with a centrifugal pump and a first monitor; the liquid conveying pipeline is connected with the circulating pipeline, and liquid in the solution preparation box can be injected into the wet winding motor main pump from a liquid injection port at the bottom of the wet winding motor main pump; the monitoring pipeline can be communicated with a liquid outlet at the top of the main pump of the wet winding motor, and a second monitor is connected to the monitoring pipeline. The invention can automatically inject uniform maintenance solution into the main pump of the wet winding motor.)

1. A maintenance device for a wet winding motor main pump, comprising:

the device comprises a solution preparation box (1), wherein the solution preparation box (1) is provided with a first liquid inlet, a second liquid inlet, a circulating liquid outlet (11) and a circulating liquid return port (12);

a maintenance reagent reservoir (2) configured to store an original concentration maintenance reagent, the maintenance reagent reservoir (2) being communicable with the second liquid inlet;

one end of the circulating pipeline (3) is communicated with the circulating liquid outlet (11), the other end of the circulating pipeline can be communicated with the circulating liquid return port (12), a centrifugal pump (31) and a first monitor (32) are connected to the circulating pipeline (3), and the first monitor (32) can monitor the PH value of liquid in the circulating pipeline (3);

the liquid conveying pipeline (4) is connected with the circulating pipeline (3) and can be used for injecting liquid in the solution preparation box (1) into the wet winding motor main pump (9) from a liquid injection port at the bottom of the wet winding motor main pump (9);

the monitoring pipeline (5) can be communicated with a liquid outlet at the top of the wet winding motor main pump (9), a second monitor (51) is connected to the monitoring pipeline (5), and the second monitor (51) is used for monitoring the PH value of liquid on the monitoring pipeline (5).

2. The maintenance device for the wet winding motor main pump according to claim 1, characterized in that a first regulating valve (52) is further connected to the monitoring pipeline (5), the first regulating valve (52) can control the opening and closing of the monitoring pipeline (5), and the outlet end of the monitoring pipeline (5) is communicated with the solution preparation tank (1).

3. The maintenance device for the wet winding motor main pump according to claim 1, characterized in that a filter screen (41) is further arranged on the liquid conveying pipeline (4).

4. The maintenance device of the wet winding motor main pump according to claim 1, characterized in that a motor water injection regulating valve (42) and a motor water injection stop valve (43) are sequentially arranged on the liquid conveying pipeline (4) along the direction of liquid flow in the liquid conveying pipeline (4).

5. The maintenance device for the wet winding motor main pump according to claim 1, characterized in that a first liquid removing and collecting recovery pipeline (6) is connected to the liquid conveying pipeline (4), and a motor drainage regulating valve (61) is arranged on the first liquid removing and collecting recovery pipeline (6).

6. The maintenance arrangement of a wet winding motor main pump according to claim 1, characterized in that a circulation regulating valve (33) and a circulation stop valve (34) are provided in the circulation line (3) in this order, downstream of the centrifugal pump (31) in the direction of the liquid flow in the circulation line (3).

7. The maintenance arrangement of a wet winding motor main pump according to claim 6, characterized in that a flow meter (35) is provided on the circulation line (3) between the circulation regulating valve (33) and the circulation stop valve (34).

8. The maintenance device for the wet winding motor main pump according to claim 6, characterized in that a second liquid removing and collecting recovery pipeline (7) is connected to the circulation pipeline (3) upstream of the circulation regulating valve (33), and a loop water drain regulating valve (71) is arranged on the second liquid removing and collecting recovery pipeline (7).

9. The apparatus for servicing a wet winding electric motor main pump according to any one of claims 1-8, characterized in that the servicing agent reservoir (2) and the second inlet port are in communication via a first connecting line, on which a plunger pump (21) and a second regulating valve (22) are arranged.

10. A method of using a wet winding motor main pump maintenance device, characterized in that the wet winding motor main pump (9) is injected with a maintenance solution by using the wet winding motor main pump maintenance device according to any one of claims 1-9, comprising the steps of:

s1, controlling the circulation pipeline (3), the infusion pipeline (4) and the monitoring pipeline (5) to be in a closed state;

s2, injecting a set amount of original A-grade water into the solution preparation tank (1);

s3, controlling a maintenance reagent storage tank (2) to continuously inject an original concentration maintenance reagent into the solution preparation box (1);

s4, controlling the circulation pipeline (3) to be opened, monitoring the display value of the first monitor (32) in real time, and controlling the maintenance reagent storage tank (2) to stop injecting the original concentration maintenance reagent into the solution preparation tank (1) after the display value of the first monitor (32) reaches a set range;

s5, controlling the opening of the infusion pipeline (4);

and S6, controlling the monitoring pipeline (5) to be opened, and controlling the circulation pipeline (3) and the infusion pipeline (4) to be closed after the second monitor (51) displays a numerical value.

Technical Field

The invention relates to the technical field of nuclear power engineering, in particular to a maintenance device for a main pump of a wet winding motor and a using method thereof.

Background

After the main pump of the wet winding motor is installed in place on site, a loop reactor coolant system where the main pump of the wet winding motor is located is in an open state, a stator core of the main pump of the wet winding motor is directly exposed in air and can generate oxidation-reduction reaction to generate corrosion, and the system can pose a great threat to the safe and stable operation of equipment after being directly put into operation, so that the main pump of the wet winding motor must be subjected to wet maintenance.

The wet maintenance is to inject a maintenance solution with the PH value of 10 +/-0.5 into the main pump of the wet winding motor. In the prior art, the maintenance solution prepared by manual work is generally injected into the main pump of the wet winding motor by an operator.

By artifical configuration maintenance solution, waste time and energy, it does not have the stirring to probably lead to each component of maintenance solution for unqualified maintenance solution carries out the maintenance to wet winding motor main pump, influences the normal use of wet winding motor main pump.

Disclosure of Invention

The invention aims to provide a maintenance device for a wet winding motor main pump and a using method thereof, which can automatically inject uniform maintenance solution into the wet winding motor main pump.

As the conception, the technical scheme adopted by the invention is as follows:

a maintenance device for a wet winding motor main pump, comprising:

the solution preparation box is provided with a first liquid inlet, a second liquid inlet, a circulating liquid outlet and a circulating liquid return port;

a maintenance reagent reservoir configured to store an original concentration maintenance reagent, the maintenance reagent reservoir being communicable with the second liquid inlet;

one end of the circulating pipeline is communicated with the circulating liquid outlet, the other end of the circulating pipeline can be communicated with the circulating liquid return port, a centrifugal pump and a first monitor are connected to the circulating pipeline, and the first monitor can monitor the pH value of liquid in the circulating pipeline;

the liquid conveying pipeline is connected with the circulating pipeline and can be used for conveying liquid in the solution preparation box into the wet winding motor main pump from a liquid injection port at the bottom of the wet winding motor main pump;

the monitoring pipeline can be communicated with a liquid outlet at the top of the main pump of the wet winding motor, a second monitor is connected to the monitoring pipeline, and the second monitor is used for monitoring the PH value of liquid on the monitoring pipeline.

Optionally, the monitoring pipeline is further connected with a first regulating valve, the first regulating valve can control the opening and closing of the monitoring pipeline, and the outlet end of the monitoring pipeline is communicated with the solution preparation tank.

Optionally, a filter screen is further arranged on the infusion pipeline.

Optionally, along the liquid flow direction in the infusion pipeline, a motor water injection regulating valve and a motor water injection stop valve are sequentially arranged on the infusion pipeline.

Optionally, the infusion pipeline is connected with a first liquid removing and collecting recovery pipeline, and the first liquid removing and collecting recovery pipeline is provided with a motor drain control valve.

Optionally, a circulation regulating valve and a circulation stop valve are arranged on the circulation pipeline in sequence downstream of the centrifugal pump in the direction of liquid flow in the circulation pipeline.

Optionally, a flow meter is provided on the circulation line between the circulation regulating valve and the circulation shutoff valve.

Optionally, a second liquid removing and collecting recovery pipeline is connected to the circulation pipeline upstream of the circulation regulating valve, and a loop drain regulating valve is arranged on the second liquid removing and collecting recovery pipeline.

Optionally, the maintenance reagent liquid storage tank and the second liquid inlet are communicated through a first connecting pipeline, and a plunger pump and a second regulating valve are arranged on the first connecting pipeline.

A use method of a maintenance device of a wet winding motor main pump is used for injecting maintenance solution into the wet winding motor main pump, and comprises the following steps:

s1, controlling the circulation pipeline, the infusion pipeline and the monitoring pipeline to be in a closed state;

s2, injecting a set amount of original A-grade water into the solution preparation tank;

s3, controlling a maintenance reagent storage tank to continuously inject an original concentration maintenance reagent into the solution preparation box;

s4, controlling the circulation pipeline to be opened, monitoring the display value of a first monitor in real time, and controlling the maintenance reagent storage tank to stop injecting the original concentration maintenance reagent into the solution preparation tank after the display value of the first monitor reaches a set range;

s5, controlling the opening of the infusion pipeline;

and S6, controlling the monitoring pipeline to be opened, and controlling the circulation pipeline and the infusion pipeline to be closed after the second monitor displays a numerical value.

When the maintenance device of the wet winding motor main pump is used, the circulation pipeline, the infusion pipeline and the monitoring pipeline are controlled to be closed, then the original A-level water with the set amount is injected into the solution preparation box, the maintenance reagent storage tank is controlled to continuously inject the original concentration maintenance reagent into the solution preparation box, the circulation pipeline is controlled to be opened at the same time, the display value of the first monitor is monitored in real time, and when the display value of the first monitor reaches the set range, the maintenance reagent storage tank is controlled to stop injecting the original concentration maintenance reagent into the solution preparation box. Under the circulation action of the circulation pipeline, the original concentration maintenance reagent and the original A-grade water are fully and uniformly mixed and stored in the solution preparation box. Then, the infusion pipeline is controlled to be opened, the infusion pipeline and the circulating pipeline act together to automatically inject the maintenance solution in the solution preparation box into the main pump of the wet winding motor, and the operation is simple and rapid; and controlling the monitoring pipeline to be opened, and after the second monitor displays a numerical value, indicating that the maintenance solution in the main pump of the wet winding motor is filled, and controlling the circulating pipeline and the infusion pipeline to be closed.

According to the use method of the maintenance device for the wet winding motor main pump, the maintenance device for the wet winding motor main pump is used for injecting the maintenance solution into the wet winding motor main pump, so that the PH precision of the adjusted maintenance reagent solution and the maintenance efficiency of the main pump motor are improved, and the uncontrollable factors and difficulty in the process of manually maintaining the motor are reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic diagram of a maintenance device for a wet winding motor main pump according to an embodiment of the invention.

In the figure:

1. a solution preparation tank; 11. a circulating liquid outlet; 12. circulating the liquid back to the liquid port;

2. a maintenance reagent storage tank; 21. a plunger pump; 22. a second regulating valve;

3. a circulation line; 31. a centrifugal pump; 32. a first monitor; 33. a circulation regulating valve; 34. a circulation stop valve; 35. a flow meter; 36. sampling regulating valve;

4. a transfusion pipeline; 41. filtering with a screen; 42. a water injection regulating valve of the motor; 43. a water injection stop valve of the motor;

5. monitoring the pipeline; 51. a second monitor; 52. a first regulating valve;

6. a first liquid removal and collection recovery pipeline; 61. a motor drain regulating valve;

7. a second liquid removing and collecting recovery pipeline; 71. a loop drain regulating valve;

8. a liquid inlet pipeline; 81. a third regulating valve;

9. wet winding motor main pump.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment provides a maintenance device of wet winding motor main pump, and it can be to automatic injection maintenance solution in the wet winding motor main pump, and can guarantee the homogeneity of maintenance solution.

Referring to fig. 1, in the present embodiment, the maintenance device for the wet winding motor main pump includes a solution preparation tank 1, a maintenance reagent storage tank 2, a circulation pipeline 3, a liquid delivery pipeline 4, and a monitoring pipeline 5.

Wherein, the solution preparation box 1 is provided with a first liquid inlet, a second liquid inlet, a circulating liquid outlet 11 and a circulating liquid return port 12. Preferably, in the present embodiment, the solution preparation tank 1 has a liquid level display function.

The maintenance reagent reservoir 2 is configured to store an original concentration maintenance reagent, and the maintenance reagent reservoir 2 is capable of communicating with the second inlet.

One end of the circulating pipeline 3 is communicated with the circulating liquid outlet 11, the other end of the circulating pipeline can be communicated with the circulating liquid return port 12, the circulating pipeline 3 is connected with a centrifugal pump 31 and a first monitor 32, and the first monitor 32 can monitor the pH value of liquid in the circulating pipeline 3.

The liquid conveying pipeline 4 is connected with the circulating pipeline 3, and liquid in the solution preparation box 1 can be injected into the wet winding motor main pump 9 from a liquid injection port at the bottom of the wet winding motor main pump 9.

The monitoring pipeline 5 can be communicated with a liquid outlet at the top of the wet winding motor main pump 9, a second monitor 51 is connected to the monitoring pipeline 5, and the second monitor 51 is used for monitoring the pH value of liquid on the monitoring pipeline 5.

The maintenance device of wet winding motor main pump that this embodiment provided is when using, control circulation pipeline 3 earlier, infusion pipeline 4 and monitoring pipeline 5 are closed, then pour into the original A level water of set amount into solution preparation case 1, control maintenance reagent liquid storage pot 2 lasts to pour into original concentration maintenance reagent into solution preparation case 1, control circulation pipeline 3 simultaneously opens, the display value of real-time supervision first monitor 32, after the display value of first monitor 32 reachd the settlement scope, control maintenance reagent liquid storage pot 2 stops to pour into original concentration maintenance reagent into solution preparation case 1. Under the circulation action of the circulation pipeline 3, the original concentration maintenance reagent and the original A-grade water are fully and uniformly mixed and stored in the solution preparation box 1. Then, the infusion pipeline 4 is controlled to be opened, the infusion pipeline 4 and the circulating pipeline 3 act together to automatically inject the maintenance solution in the solution preparation box 1 into the main pump 9 of the wet winding motor, and the operation is simple and rapid; and controlling the monitoring pipeline 5 to be opened, and after the second monitor 51 displays a numerical value, indicating that the maintenance solution in the main pump 9 of the wet winding motor is filled, and controlling the circulating pipeline 3 and the infusion pipeline 4 to be closed.

Further, in this embodiment, the first liquid inlet is further connected to a liquid inlet pipeline 8, and the liquid inlet pipeline 8 is provided with a third regulating valve 81. When the original A-level water is injected into the solution preparation tank 1, the third regulating valve 81 is opened, and the original A-level water is injected from the power plant desalted water distribution system to the solution preparation tank 1 from the liquid inlet pipe 8. The third regulating valve 81 can control the injection amount of the raw class a water into the solution preparation tank 1 through the liquid inlet pipe 8.

Further, the maintenance reagent liquid storage tank 2 is communicated with the second liquid inlet through a first connecting pipeline, and a plunger pump 21 and a second regulating valve 22 are arranged on the first connecting pipeline. The plunger pump 21 and the second regulating valve 22 are simultaneously opened so that the maintenance reagent reservoir tank 2 can inject the maintenance reagent of the original concentration into the solution preparation tank 1. The plunger pump 21 can provide sufficient pressure for the original concentration of the maintenance agent in the maintenance agent reservoir tank 2 to be injected into the solution preparation tank 1.

Specifically, in this embodiment, the pH of the original concentration maintenance reagent is 13.

Further, in the present embodiment, a circulation adjusting valve 33 and a circulation cutoff valve 34 are provided in this order on the circulation line 3 downstream of the centrifugal pump 31 in the flow direction in the circulation line 3. The circulation cut-off valve 34 can control the flow direction of the liquid in the circulation line 3. The circulation adjustment valve 33 can control the flow rate of the liquid in the circulation line 3.

A flow meter 35 is provided on the circulation line 3 between the circulation control valve 33 and the circulation shutoff valve 34. The flow meter 35 can display the flow rate of the liquid in the circulation line 3 in real time.

A second collected liquid removing/recovering line 7 is connected to the circulation line 3 upstream of the circulation control valve 33, and a return drain control valve 71 is provided in the second collected liquid removing/recovering line 7. The circuit trap control valve 71 can control the trap flow rate of the circulation line 3.

A second connecting pipeline is connected between the first monitor 32 and the circulating pipeline 3, and a sampling regulating valve 36 is arranged on the second connecting pipeline. When it is desired to monitor the PH of the liquid in the circulation line 3, the sample-regulating valve 36 is opened so that the liquid in the circulation line 3 flows to the first monitor 32 via the second connection line.

In the circulation pipeline 3, the centrifugal pump 31 can provide sufficient pressure for the liquid circulation stirring in the circulation pipeline 3, and can provide sufficient pressure for the infusion pipeline 4 to ensure that the maintenance solution is injected into the wet winding motor main pump 9.

Further, in this embodiment, the infusion pipeline 4 is further provided with a filter screen 41 to prevent impurities from entering the wet winding motor main pump 9

Along the direction of liquid flow in the infusion pipeline 4, a motor water injection regulating valve 42 and a motor water injection stop valve 43 are sequentially arranged on the infusion pipeline 4. The motor water injection regulating valve 42 can regulate the flow of solution into the wet winding motor main pump 9. The motor water injection stop valve 43 can control the water injection flow and the water drainage flow of the wet winding motor main pump 9.

The infusion pipeline 4 is connected with a first liquid removing and collecting recovery pipeline 6, and the first liquid removing and collecting recovery pipeline 6 is provided with a motor drain control valve 61.

Further, in this embodiment, still be connected with first governing valve 52 on the monitoring pipeline 5, first governing valve 52 can control the switching of monitoring pipeline 5, and the exit end and the solution preparation case 1 intercommunication of monitoring pipeline 5 avoid solution extravagant. Specifically, the solution preparation tank 1 is further provided with a main pump return port, and the outlet end of the monitoring pipeline 5 is communicated with the main pump return port.

Specifically, in the present embodiment, the first monitor 32 and the second monitor 51 are PH value testers.

The maintenance device of wet winding motor main pump that this embodiment provided adopts the mode of the pH value of the solution in circulating line 3 and the first monitor 32 on-line monitoring circulating line 3, squeezes into the mode of wet winding motor main pump 9 behind the contrast ordinary manual work is equipped with maintenance reagent solution, has obviously promoted the PH precision of maintenance reagent solution of transferring and the efficiency of main pump motor maintenance work, has reduced the uncontrollable factor and the degree of difficulty of manual maintenance motor in-process.

Form safe pressure barrier through closed circulation circuit, when the pressure abnormal conditions, can be through the switch of different valve components, realize the maintenance circuit open, stop state and controllable circulation regulation maintenance reagent solution pH value for the factor of safety of device is higher.

Through setting up monitoring pipeline 5, realize the main pump after operation cycle or maintenance cycle, the sampling monitoring function of the inside solution pH value of main pump to judge whether need to change maintenance reagent solution, and realize the function of online change.

The embodiment also provides a use method of the maintenance device of the wet winding motor main pump, and the maintenance device of the wet winding motor main pump is used for injecting the maintenance solution into the wet winding motor main pump 9, and the method comprises the following steps:

and S1, the control circulation pipeline 3, the infusion pipeline 4 and the monitoring pipeline 5 are in a closed state.

Specifically, before step S1, whether the states of all components of the maintenance device of the wet winding motor main pump are normal or not is checked, and the pipeline of the maintenance device can be cleaned by using compressed air before maintenance, so as to ensure that the interior of the pipeline is clean and has no foreign objects. The power line is switched on.

Specifically, in step S1, when the circulation line 3 is controlled to be in the closed state, the centrifugal pump 31, the sampling regulating valve 36, the circuit drain regulating valve 71, the circulation regulating valve 33, and the circulation cut-off valve 34 are all controlled to be in the closed state. When the control infusion pipeline 4 is in a closed state, the control motor water injection regulating valve 42 and the motor water injection stop valve 43 are in a closed state. When the control monitor line 5 is in the closed state, the first regulating valve 52 is controlled to be closed.

S2, a predetermined amount of raw class a water is injected into the solution preparation tank 1.

Specifically, in step S2, the third regulating valve 81 is opened, the raw class a water is injected from the power plant desalted water distribution system to the solution preparation tank 1 by about 2m3, and the third regulating valve 81 is closed.

S3, controlling the maintenance reagent storage tank 2 to continuously inject the maintenance reagent with the original concentration into the solution preparation box 1.

Specifically, in step S3, the plunger pump 21 is opened, and the injection amount of the original-concentration maintenance reagent into the injection solution preparation tank 1 is adjusted by adjusting the opening degree of the second adjustment valve 22.

And S4, controlling the circulation pipeline 3 to be opened, monitoring the display value of the first monitor 32 in real time, and controlling the maintenance reagent storage tank 2 to stop injecting the original concentration maintenance reagent into the solution preparation tank 1 after the display value of the first monitor 32 reaches a set range.

Specifically, in step S4, it is confirmed that the motor water filling regulating valve 42, the first regulating valve 52, the motor drain regulating valve 61, the motor water filling stop valve 43, and the loop drain regulating valve 71 are all closed, and at this time, the circulation line 3 is in the internal circulation stirring state, the sampling regulating valve 36 is opened, and the display value of the first monitor 32 is monitored; in step S4, the opening of the second regulating valve 22 and the flow rate of the plunger pump 21 are adjusted until the value indicated by the first monitor 32 reaches the set range, and then the maintenance reagent reservoir tank 2 is controlled to stop the injection of the original concentration maintenance reagent into the solution preparation tank 1. Specifically, the set range is 9.5 to 10.5. When the display value of the first monitor 32 reaches the set range, the maintenance reagent storage tank 2 is controlled to stop injecting the original concentration maintenance reagent into the solution preparation tank 1, the second regulating valve 22 and the plunger pump 21 are closed, the circulation pipeline 3 continues to operate for the set time, and the uniformity of the solution is ensured.

And S5, controlling the opening of the infusion pipeline 4.

Specifically, step S5 includes:

s51, observing the flowmeter 35, and slowly adjusting the opening of the circulation adjusting valve 33 to stabilize the flow in the circulation pipeline 3 at 40L/min;

s52, sequentially opening the motor water injection regulating valve 42 and the motor water injection stop valve 43 and closing the circulation stop valve 34; at this time, the maintenance device of the wet winding motor main pump injects the maintenance solution with the adjusted PH value into the wet winding motor main pump 9.

And S6, controlling the monitoring pipeline 5 to be opened, and controlling the circulation pipeline 3 and the infusion pipeline 4 to be closed after the second monitor 51 displays the numerical value.

Specifically, in step S6, the first regulator valve 52 is opened to monitor that the line 5 is open. When the second monitor 51 indicates a value and a steady flow of water is flowing downstream of the first regulating valve 52, it indicates that the interior of the wet-winding motor main pump 9 is completely filled with the PH-regulated maintenance solution.

And S7, closing the centrifugal pump 31, the motor water injection stop valve 43 and the first regulating valve 52, opening the motor drain regulating valve 61 and the loop drain regulating valve, and discharging redundant liquid in the loop.

Further, after the operation or maintenance period, the maintenance device of the wet winding motor main pump can also sample and detect the pH value of the maintenance solution in the wet winding motor main pump 9.

Specifically, the steps of sampling and detecting the PH value of the maintenance solution inside the wet winding motor main pump 9 are as follows:

s01, executing the steps S1-S4, and preparing a new maintenance solution;

s02, observing the flowmeter 35, and slowly adjusting the opening of the circulation adjusting valve 33 to stabilize the flow in the circulation pipeline 3 at 40L/min;

s03, opening the first regulating valve 52, slowly opening the motor water injection regulating valve 42 and circulating the stop valve 34;

s04, opening the water injection stop valve 43 of the motor, and injecting the newly configured maintenance solution into the wet winding motor main pump 9; at this time, the main pump 9 of the wet winding motor is filled with the maintenance solution prepared before, so that the medium in the monitoring pipeline 5 can quickly flow into the solution preparation tank 1;

s05, observing the display value of the second monitor 51, recording the PH of the initial discharge liquid inside the main pump 9 of the wet winding motor, which is considered as the PH of the internal solution after the motor maintenance/operation cycle, and determining whether the maintenance liquid inside the motor needs to be replaced according to the PH. If the pH is less than 9.5, steps S1-S7 are performed.

The use method of the maintenance device for the wet winding motor main pump provided by this embodiment uses the maintenance device for the wet winding motor main pump, and can inject the maintenance solution with the PH value of 10 ± 0.5 into the wet winding motor main pump 9. Adopt the mode of the pH value of the solution in circulating line 3 and the first monitor 32 on-line monitoring circulating line 3, squeeze into the mode of wet winding motor main pump 9 behind the ordinary manual work of contrast and be equipped with maintenance reagent solution, obviously promoted the PH precision of the maintenance reagent solution of transferring and the efficiency of main pump motor maintenance work, reduced the uncontrollable factor and the degree of difficulty of manual maintenance motor in-process.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.