A cleaning tool for carbon powder in brushed generator windings used in nuclear power plants.

Abstract

This application provides a cleaning tool for carbon powder in the windings of a brushed generator used in nuclear power plants. The cleaning tool includes a purging and suction pipe section and an integrated device section. The purging and suction pipe section includes a suction pipe and a purging module. The purging module includes a blowing pipe, a camera, and a lighting device. The end of the blowing pipe is flexible. The integrated device section includes a pressure measuring and regulating module, a negative pressure suction module, a dust collection module, and a controller integrated within the integrated device body. A portion of the suction pipe and the blowing pipe are integrated within the integrated device body. The negative pressure suction module is connected to the suction pipe and the dust collection module. The pressure measuring and regulating module is connected to the blowing pipe. The controller is used to control the pressure measuring and regulating module to regulate the compressed air pressure during purging and to control the negative pressure suction module to perform suction during suction. This application provides a cleaning tool that simultaneously has purging and suction functions and allows for remote operation of pipe bending, thereby solving the problem of poor cleaning effect in existing cleaning tools.

Description

Technical Field

[0001] This application belongs to the field of cleaning technology for carbon powder in the windings of nuclear power plant rod generators, specifically relating to a cleaning tool for carbon powder in the windings of brushed generators used in nuclear power plants. Background Technology

[0002] The nuclear power reactor control rod drive mechanism power supply system consists of two grid-connected motor-flywheel-generator sets and their control and protection equipment. It is specifically designed to supply power to the reactor control rod drive mechanism, and its function is extremely important. The rod power generator (hereinafter referred to as the generator) uses brushed excitation. The generator excitation current is introduced into the generator rotor windings via carbon brushes and slip rings. Since the carbon brushes are stationary and fixed during generator operation, while the slip rings are rotating, the carbon brushes are in contact with the slip rings. Because the carbon brushes are made of soft graphite, they continuously wear down during generator operation, producing graphite dust. This graphite dust adheres to the generator armature and excitation windings, causing contamination. Excessive carbon dust contamination of the windings can lead to a decrease in the insulation of the motor windings, posing a risk of generator burnout.

[0003] Previously, cleaning generator winding carbon powder mainly involved a makeshift setup of a "straight copper pipe + pressure gauge + external air source." This method had the following drawbacks: 1) Because the generator interior is almost a closed space, using compressed air to blow carbon powder from the windings did not effectively remove it from the generator interior, and the powder might re-adhere to the windings after a period of time. 2) Because the blowing pipe was a straight copper pipe, it could only blow in a straight line, leaving some areas untouched and inaccessible. 3) Since the straight copper pipe extended into the generator interior, workers could not observe the specific contaminated areas inside the windings, making targeted cleaning impossible. Summary of the Invention

[0004] In view of this, the present application aims to provide a cleaning tool for carbon powder in the windings of brushed generators used in nuclear power plants. By setting the cleaning tool to have both blowing and suction functions and remotely operate the pipe bending, the problem of poor cleaning effect of existing cleaning tools can be solved.

[0005] This application provides a cleaning tool for carbon powder in the windings of a brushed generator used in nuclear power plants. The cleaning tool includes a purging and suction pipe section and an integrated device section. The purging and suction pipe section includes a suction pipe and a purging module. The purging module includes a blowing pipe and a camera and lighting device located at the end of the blowing pipe. The end of the blowing pipe is flexible. The integrated device section includes a pressure measuring and regulating module, a negative pressure suction module, a dust collection module, and a controller integrated within the integrated device body. A portion of the suction pipe and the blowing pipe are integrated within the integrated device body. The pressure measuring and regulating module is used to regulate the pressure of compressed air. The negative pressure suction module is connected to the suction pipe and the dust collection module. The pressure measuring and regulating module is connected to the blowing pipe. The controller is used to control the pressure measuring and regulating module to regulate the compressed air pressure during purging and to control the negative pressure suction module to perform suction during suction. The dust collection module is used to collect carbon powder during suction.

[0006] In one specific embodiment of this application, the suction tube is installed inside the blowing tube, and the diameter of the suction tube is smaller than the diameter of the blowing tube.

[0007] In one specific embodiment of this application, the air blowing tube includes a straight copper tube and a flexible hose connected by a quick connector, as well as a flexible portion connected to the flexible hose.

[0008] In one specific embodiment of this application, the integrated device portion further includes a flexible hose hub integrated within the integrated device body. The flexible hose hub is used to wind the flexible hoses together.

[0009] In one specific embodiment of this application, the integrated device portion further includes a power supply integrated within the integrated device body, the power supply being used to power the controller.

[0010] In one specific embodiment of this application, the integrated device further includes an air source drying module and a condensate collection tank integrated within and connected to the integrated device body. The air source drying module is located upstream of the pressure measuring and regulating module and is used to dry the compressed air. Moisture in the compressed air, after being dried by the air source drying module, enters the condensate collection tank and becomes condensate.

[0011] In one specific embodiment of this application, the integrated device portion further includes a gas heating module integrated within the integrated device body and located downstream of the pressure measurement and regulation module.

[0012] In one specific embodiment of this application, the integrated device portion further includes an air pump integrated within the integrated device body and located upstream of the pressure measurement and regulation module.

[0013] In one specific embodiment of this application, the integrated device part also includes four casters with locking wheel function located at the bottom of the integrated device body.

[0014] In one specific embodiment of this application, the overall weight of the integrated device portion is no more than 80 kg.

[0015] The beneficial effects of this application's technical solution are as follows: By simultaneously setting up an air blowing pipe and an air suction pipe in the cleaning tool, with the negative pressure suction module connected to the suction pipe and the pressure measuring and regulating module connected to the air blowing pipe, the controller controls the pressure measuring and regulating module to regulate the compressed air pressure during air blowing and controls the negative pressure suction module to perform suction during air suction. Thus, through a multi-functional integrated design, an automated brushed generator toner blowing tool with an integrated device for cleaning pipes is realized, enabling the cleaning tool to simultaneously perform blowing and suction functions. Furthermore, the pipes in this cleaning tool can be remotely bent via the controller. Compared to existing spliced ​​tools consisting of a "straight copper pipe + pressure gauge + external air source," the cleaning tool provided in this application embodiment can both blow and absorb toner, thoroughly cleaning the toner inside the generator and improving the toner cleaning effect. In addition, since the end of the air blowing pipe can be remotely bent at a certain angle, the toner cleaning range is wider and more comprehensive. The added lighting and camera functions can more accurately locate the toner accumulation position. Attached Figure Description

[0016] Figure 1 The diagram shown is a structural schematic of a cleaning tool for carbon powder in the windings of a brushed generator used in nuclear power, provided in an embodiment of this application. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] At least one embodiment of this application provides a cleaning tool for carbon powder in the windings of a brushed generator used in nuclear power plants, see reference. Figure 1The cleaning tool includes a blowing and suction pipe section and an integrated device section. The blowing and suction pipe section includes a suction pipe 9 and a blowing module 10. The blowing module 10 includes a blowing pipe and a camera and lighting device located at the end of the blowing pipe. The end of the blowing pipe is flexible. The integrated device section includes a pressure measuring and regulating module 2, a negative pressure suction module 6, a dust collection module 7, and a controller 8 integrated within the integrated device body A. A portion of the suction pipe 9 and the blowing pipe are integrated within the integrated device body A. The pressure measuring and regulating module 2 is used to regulate the pressure of compressed air. The negative pressure suction module 6 is connected to the suction pipe 9 and the dust collection module 7. The pressure measuring and regulating module 2 is connected to the blowing pipe. The controller 8 is used to control the pressure measuring and regulating module 2 to regulate the compressed air pressure during blowing and to control the negative pressure suction module 6 to perform suction during suction. The dust collection module 7 is used to collect toner during suction.

[0019] For example, the negative pressure suction module 6 has a maximum suction negative pressure of ≥0.1Mpa. The camera resolution can be greater than 1080P, with photo and video recording functions, and a built-in handheld portable screen display. The lighting device can be equipped with ≥6 LED lights, with adjustable brightness. The bundled cable of the controller 8 can be tied and fixed to the air blowing tube. The dust collection module 7 is detachable and cleanable.

[0020] According to the technical solution provided in this application embodiment, by simultaneously setting an air blowing pipe and an air blowing pipe 9 in the cleaning tool, the negative pressure suction module 6 is connected to the suction pipe 9, and the pressure measuring and regulating module 2 is connected to the air blowing pipe. The controller 8 controls the pressure measuring and regulating module 2 to regulate the compressed air pressure during air blowing, and controls the negative pressure suction module 6 to perform suction during air suction. Thus, through a multi-functional integrated design, an automated brushed generator toner blowing tool with an integrated device for cleaning pipes is realized. This allows the cleaning tool to simultaneously perform blowing and suction functions, and also allows the pipes in the cleaning tool to be remotely bent via the controller. Compared to existing spliced ​​tools consisting of a "straight copper pipe + pressure gauge + external air source," the cleaning tool provided in this application embodiment can both blow and absorb toner, thoroughly cleaning the toner inside the generator and improving the toner cleaning effect. Furthermore, since the end of the air blowing pipe can be remotely bent at a certain angle, the toner cleaning range is wider and more comprehensive. The added lighting and camera functions can more accurately locate the toner accumulation position.

[0021] In at least one embodiment of this application, the inhalation tube 9 is installed inside the blowing tube, and the diameter of the inhalation tube 9 is smaller than the diameter of the blowing tube. For example, the diameter of the inhalation tube 9 ranges from 5mm to 8mm, and the diameter of the blowing tube ranges from 15mm to 20mm.

[0022] In at least one embodiment of this application, the air blowing tube includes a straight copper tube and a flexible hose connected by a quick connector, and a flexible portion connected to the flexible hose.

[0023] In at least one embodiment of this application, the bending angle of the flexible portion ranges from 0° to 120°. The minimum length of the flexible portion is ≥100mm. The length of the hose ranges from 5000mm to 7000mm.

[0024] In at least one embodiment of this application, the flexible portion is covered with a flexible polyurethane (PU) material.

[0025] In at least one embodiment of this application, the integrated device portion further includes a hose reel 11 integrated within the integrated device body A. The hose reel 11 is used to wind the hoses together. In this way, on the one hand, the hoses can be easily managed and used, avoiding a messy state, and on the other hand, the length of the hoses can be increased, making it easier for the flexible portion to extend to deeper locations inside the generator for cleaning.

[0026] In at least one embodiment of this application, the integrated device portion further includes a power supply integrated within the integrated device body A. The power supply powers the controller 8. For example, the power supply can be powered by 380V AC or 220V DC. Thus, by providing a built-in power supply within the integrated device portion, the cleaning tool becomes more convenient to use.

[0027] In at least one embodiment of this application, the integrated device further includes an air source drying module 1 and a condensate collection tank 5 integrated within and connected to the integrated device body A. The air source drying module 1 is located upstream of the pressure measuring and regulating module 2 and is used to dry the compressed air. Moisture in the compressed air is dried by the air source drying module 1 and then enters the condensate collection tank 5 to become condensate. Thus, by drying the compressed air through the air source drying module 1, the compressed air has a lower humidity, resulting in better toner cleaning performance.

[0028] For example, in some embodiments, the condensate collection tank 5 is removable for cleaning.

[0029] In at least one embodiment of this application, the integrated device further includes a gas heating module 3 integrated within the integrated device body and located downstream of the pressure measuring and regulating module 2. Thus, the compressed air, after being processed by the drying module 1 and the gas heating module 3, possesses the characteristics of high temperature and dryness, which more effectively cleans the carbon powder adhering to the oil stains on the winding body, further improving the carbon powder cleaning effect.

[0030] The gas heating module 3 can adjust the heating temperature of compressed air from room temperature to 70℃. The gas heating module 3 can also digitally display the temperature value and adjust the temperature in preset ranges.

[0031] The integrated device can have its own air source, or it can use an external air source as a backup air source, or it can have its own air source while using an external air source as a backup air source.

[0032] The factory uses compressed air from both inside and outside, but the compressed air purging pressure is low, resulting in poor purging effect. To improve the purging effect, in at least one embodiment of this application, the integrated device also includes an air pump 4 located upstream of the pressure measuring and regulating module 2. If an air source drying and processing module 1 is included, the air pump 4 is located upstream of the air source drying and processing module 1. In this way, by setting the cleaning tool to have its own air pump that can supply compressed air and produce higher compressed air pressure, the problem of no compressed air available due to external air source failure can be avoided.

[0033] For example, the air pump 4 can supply compressed air with a pressure adjustment range of 0 MPa to 1 MPa. The air pump 4 can also digitally display the pressure value and adjust the pressure in preset ranges.

[0034] In at least one embodiment of this application, the integrated device also includes four casters with locking function. This makes the cleaning tool easy to move and transport.

[0035] In at least one embodiment of this application, the overall weight of the integrated device portion does not exceed 80 kg. For example, in some embodiments, the integrated device portion may be made of lightweight aluminum alloy or other materials. This makes the cleaning tool lightweight, easy to move, and transport.

[0036] The integrated device can dry the output gas, with a humidity requirement of ≤45%, and the humidity value must be digitally displayed.

[0037] The following describes, with reference to specific embodiments, the method of using the cleaning tool for brushed generator winding carbon powder for nuclear power provided in this application.

[0038] Method 1: Use an external air source to supply air to the purging tool

[0039] Connect the power supply to the tool and connect the external air supply pipe to the external air supply interface of the air source drying module 1. The operator holds the air blowing pipe and adjusts it to the appropriate length. Turn on the power supply, and the external air source enters the drying module 1 through the connecting pipe. The moisture in the compressed air then passes through the drying process and enters the condensate collection tank 5 to become condensate. The compressed air continues to enter the pressure measuring and regulating module 2, where the compressed air pressure can be viewed and adjusted as needed. The compressed air then enters the gas heating module 3 for heating. Finally, the compressed air is blown out through the air blowing pipe. At this point, the air blowing pipe is inserted into the generator and blown out. The camera and lighting device on the air pipe identify the areas with severe carbon dust contamination inside the generator windings and blow them out. After blowing, the controller 8 is adjusted to switch the blowing pipe to the suction pipe 9. At this time, the negative pressure suction module 6 starts to work, and the suction pipe 9 generates suction to absorb and clean the carbon dust inside the generator and suck it into the dust collection module 7 for collection. After the carbon dust inside the generator is cleaned, the suction pipe 9 is restored to its initial state, the power supply is turned off, the condensate collection tank 5 and the dust collection module 7 are removed and cleaned, and after cleaning, they are reinstalled to their initial state. Then, the external air source pipe and external power supply are disconnected, and the work is completed.

[0040] Method 2: Use your own gas source for gas supply

[0041] After terminating the power supply to the tool, the operator takes the air hose and adjusts it to the appropriate length. The power is then turned on, and the compressed air supplied by the air pump 4 enters the drying module 1 through the connecting pipe. The moisture in the compressed air is then dried by the air source drying module 1 and enters the condensate collection tank 5 to become condensate. The compressed air continues to enter the pressure measuring and regulating module 2, where the pressure can be monitored and adjusted as needed. The compressed air then enters the gas heating module 3 for heating. Finally, the compressed air is blown out through the air hose, which is then inserted into the generator. Using the camera and lighting device on the air blowing pipe, identify the areas of severe carbon dust contamination in the generator's internal windings and blow them clean. After blowing, adjust the controller 8 to switch the air blowing pipe to the suction pipe 9. At this time, the negative pressure suction module 6 starts working, and the suction pipe 9 generates suction to absorb and clean the carbon dust inside the generator and suck it into the dust collection module 7 for collection. After the carbon dust inside the generator is cleaned, return the suction pipe 9 to its initial state, turn off the power, remove the condensate collection tank 5 and the dust collection module 7 for cleaning, and reinstall them to their initial state after cleaning. The work is then complete.

[0042] It should be noted that the combination of the technical features in the embodiments of this application is not limited to the combination methods described in the embodiments of this application or the combination methods described in specific embodiments. All technical features described in this application can be freely combined or combined in any way, unless they contradict each other.

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cleaning tool for carbon powder in the windings of a brushed generator used in nuclear power plants, characterized in that, Includes the purging and suction piping sections and the integrated unit section. The purge and suction pipe section includes a suction pipe and a purge module. The purge module includes a blowing pipe and a camera and lighting device located at the end of the blowing pipe. The end of the blowing pipe is flexible. The integrated device includes a pressure measuring and regulating module, a negative pressure suction module, a dust collection module, and a controller integrated within the device body. A portion of the suction pipe and the blowing pipe are integrated within the device body. The pressure measuring and regulating module regulates the compressed air pressure. The negative pressure suction module is connected to the suction pipe and the dust collection module. The pressure measuring and regulating module is connected to the blowing pipe. The controller controls the pressure measuring and regulating module to regulate the compressed air pressure during blowing and controls the negative pressure suction module to perform suction during suction. The dust collection module collects toner during suction. The integrated device also includes an air source drying module and a condensate collection tank integrated and connected within the integrated device body. The air source drying module is located upstream of the pressure measuring and regulating module and is used to dry the compressed air. After the moisture in the compressed air is dried by the air source drying module, it enters the condensate collection tank and becomes condensate.

2. The cleaning tool according to claim 1, characterized in that, The suction tube is installed inside the blowing tube, and the diameter of the suction tube is smaller than the diameter of the blowing tube.

3. The cleaning tool according to claim 1, characterized in that, The air blowing tube includes a straight copper tube and a flexible hose connected by a quick connector, as well as a flexible portion connected to the flexible hose.

4. The cleaning tool according to claim 3, characterized in that, The integrated device also includes a hose hub integrated within the integrated device body, the hose hub being used to wind hoses together.

5. The cleaning tool according to claim 1, characterized in that, The integrated device portion also includes a power supply integrated within the integrated device body, the power supply being used to power the controller.

6. The cleaning tool according to claim 1, characterized in that, The integrated device also includes a gas heating module integrated within the integrated device body and located downstream of the pressure measuring and regulating module.

7. The cleaning tool according to claim 1, characterized in that, The integrated device also includes an air pump integrated within the integrated device body and located upstream of the pressure measuring and regulating module.

8. The cleaning tool according to claim 1, characterized in that, set The integrated device also includes four omnidirectional wheels with locking function located at the bottom of the integrated device body.

9. The cleaning tool according to any one of claims 1 to 8, characterized in that, The overall weight of the integrated device is no more than 80 kg.

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