Automatic cleaning machine for interior of generator

Abstract

The invention relates to the technical field of generators, and provides a generator interior automatic cleaning machine which comprises a rotor, magnetic poles annularly distributed on the outer wall of the rotor, a cleaning module installed at the position where one magnetic pole is located in a replacing mode, a control module arranged on the rotor, a water tank and a high-pressure water pump. The spraying gun sprays high-pressure water flow to the inner wall of the stator from top to bottom to achieve washing, meanwhile, carbon dioxide gas prepared by the dry ice device is compressed through the air compressor and then pumped into the high-pressure dry ice spraying head through the vacuum pump, the washed inner wall of the stator is blow-dried through the high-pressure dry ice spraying head, and dust and water vapor are recycled through the recycling cover; a camera on the cleaning module carries out real-time photographing and comparison so as to judge whether the section is clear and clean or not, a spray gun and a high-pressure dry ice spray head are driven to do lifting motion under driving of an electric sliding table, cleaning work of a single section is achieved, the automatic cleaning mode is adopted for replacing manual cleaning, and the cleaning efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of generators, and more specifically, to an automatic cleaning machine inside a generator. Background Art

[0002] The distribution of magnetic and electric fields inside a generator is crucial for its normal operation. If there are sundries inside, it may interfere with the distribution of magnetic and electric fields, resulting in increased electromagnetic losses, unstable output voltage and frequency of the generator, affecting the power generation quality, reducing the performance and efficiency of the generator, and unable to meet the normal requirements of electrical equipment. Therefore, it is necessary to regularly clean the inner wall of the stator of the generator.

[0003] Currently, the conventional method used in power plants is manual cleaning, which has the following disadvantages: the working space is narrow and there is an unpleasant smell, which is not conducive to the physical and mental health of the staff; the high frequency and long time of intermittent rest result in low cleaning efficiency and high labor cost; manual operation, and the consistency of cleaning effect needs to be improved. Summary of the Invention

[0004] The present invention provides an automatic cleaning machine inside a generator, which solves the problems of low efficiency and high cost in manual cleaning in the prior art.

[0005] The technical solution of the present invention is as follows: an automatic cleaning machine inside a generator, including a rotor, and magnetic poles annularly distributed on the outer wall of the rotor, further including a cleaning module replaceably installed at the position of one of the magnetic poles, a control module arranged on the rotor, a water tank and a high-pressure water pump;

[0006] The cleaning module includes a mounting plate fixed on the rotor, an electric slide table arranged on the mounting plate, a cleaning actuator that can move up and down under the drive of the electric slide table to clean the inner wall of the stator, and a recovery cover for recovering the dust and water vapor cleaned by the cleaning actuator.

[0007] Preferably, the electric slide table includes a servo motor, a coupling, a transmission belt driven by the servo motor through the coupling to drive the cleaning actuator, and a photoelectric position switch for positioning when the transmission belt drives the cleaning actuator.

[0008] Preferably, the cleaning actuator includes a fixing plate fixed on the transmission belt, a camera installed on the fixing plate for photographing the inner wall of the stator, a spray gun for spraying high-pressure water flow on the inner wall of the stator, a high-pressure dry ice nozzle for drying the water stains on the inner wall of the stator after cleaning, and a cylinder for opening and closing the spray gun.

[0009] Preferably, the control module includes an electrical control box, a dry ice device, an air compressor for compressing the carbon dioxide gas produced by the dry ice device, a vacuum pump for guiding the compressed carbon dioxide gas to a high-pressure dry ice nozzle, and a power source for supplying power to the dry ice device, the air compressor, and the vacuum pump.

[0010] Preferably, the control module further includes a collection box and an air pump for guiding the dust and water vapor recovered by the recovery hood into the collection box. A filter screen for intercepting the dust in the water vapor is arranged in the collection box.

[0011] Preferably, the dry ice device includes a motor, a frequency converter for regulating the motor speed, a dry ice box storing solid dry ice, a grinder for grinding and atomizing the solid dry ice in the dry ice box driven by the motor, a hose for introducing gaseous carbon dioxide into the high-pressure dry ice nozzle, and a pneumatic valve arranged on the hose for opening and closing the carbon dioxide gas flow.

[0012] Preferably, the high-pressure water pump guides the water in the water tank to the spray gun through a water pipe.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. In the present invention, the water source in the water tank is compressed by a high-pressure water pump and guided to the spray gun through a water pipe. The spray gun sprays high-pressure water flow downward on the inner wall of the stator to achieve cleaning. At the same time, the carbon dioxide gas produced by the dry ice device is compressed by the air compressor and pumped into the high-pressure dry ice nozzle through the vacuum pump. The high-pressure dry ice nozzle dries the inner wall of the stator after cleaning. The recovery hood is used to recover dust and water vapor, and the camera on the cleaning module takes real-time photos for comparison to determine whether it is clear and clean. Driven by the electric sliding table, the spray gun and the high-pressure dry ice nozzle move up and down to achieve the cleaning work of a single section. The present invention adopts an automated cleaning method instead of manual cleaning, greatly improving the cleaning efficiency.

[0015] 2. In the present invention, the cleaning method of the cleaning module adopts a top-down scheme. The spray gun and the high-pressure dry ice nozzle cooperate with each other to clean from top to bottom. After cleaning one grid, the next grid is cleaned by rotating the rotor until the entire stator is cleaned. The cleaning method of the stator adopts a grid division scheme. The inner wall of the stator is divided into multiple sections, and adjacent sections have a certain overlapping surface. Driven by the barring gear, the rotor rotates one week, and each section of the stator is cleaned one by one by the cleaning module, so as to achieve the purpose of comprehensive cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0017] Figure 1 It is a three-dimensional schematic diagram of the installation position of an automatic cleaning machine inside a generator proposed by the present invention;

[0018] Figure 2 This is a top view schematic diagram of the installation position of an internal automatic cleaning machine for a generator proposed by the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the cleaning module proposed by the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the cleaning execution mechanism proposed by the present invention;

[0021] Figure 5 This is a schematic diagram of the electrical control principle of the control module proposed by the present invention;

[0022] Figure 6 This is a schematic diagram of the electrical control composition of the electric slide table proposed by the present invention;

[0023] In the figure: 100, rotor; 200, magnetic pole; 300, cleaning module; 301, mounting plate; 302, electric slide table; 303, cleaning execution mechanism; 304, recovery cover; 331, fixing plate; 332, camera; 333, high-pressure dry ice spray head; 334, spray gun; 335, cylinder; 400, control module; 500, water tank; 600, high-pressure water pump. Specific embodiments

[0024] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0025] Please refer to Figure 1 And Figure 2 , the present invention provides a technical solution: an internal automatic cleaning machine for a generator, including a rotor 100 and magnetic poles 200 annularly distributed on the outer wall of the rotor 100. It also includes a cleaning module 300 replaceably installed at the position of one of the magnetic poles 200, a control module 400, a water tank 500, and a high-pressure water pump 600 provided on the rotor 100. The cleaning module 300 is installed and fixed by removing one of the magnetic poles 200 and using the screws for fixing the magnetic pole 200.

[0026] Among them, the cleaning module 300 includes a mounting plate 301 fixed on the rotor 100, an electric slide table 302 provided on the mounting plate 301, a cleaning execution mechanism 303 that can move up and down under the drive of the electric slide table 302 to clean the inner wall of the stator, and a recovery cover 304 that recovers the dust and water vapor cleaned by the cleaning execution mechanism 303.

[0027] The electric slide table 302 includes a servo motor, a coupling, a transmission belt that is driven by the servo motor to drive the cleaning actuator 303 through the coupling, and a photoelectric position switch for positioning when the transmission belt drives the cleaning actuator 303. The electric slide table 302 adopts an electric drive mechanism commonly used in the industrial control field. The power source comes from the servo motor, which can respond quickly and sensitively to the input control signal. The linear module structure formed by this mechanism is simple and has no risk of oil leakage or air leakage. The installation space is small, which is conducive to electrical connection. Since the actual cleaning range on site is large, the belt type is adopted in this embodiment. In embodiments with a smaller application range, the electric slide table 302 can adopt the screw type. The power control unit of the electric slide table 302, such as Figure 6 shown, adopts a Siemens PLC, which can replace the controller and the single-chip microcomputer in the figure.

[0028] The photoelectric position switch serves as the feedback unit of the cleaning actuator 303, that is, acts as the "eyes" of the nozzle. There are three feedback positions. One is the lowest moving position of the cleaning actuator 303, the second is the highest moving position of the cleaning actuator 303, and the third is the zero position of the cleaning actuator 303. To ensure the stator cleaning process, the dry ice ejected by the high-pressure dry ice nozzle 333 will not interfere with the displacement sensor and ensure the accuracy of the feedback. Therefore, a photoelectric induction switch is selected, which is simple and reliable.

[0029] The cleaning actuator 303 includes a fixing plate 331 fixed on the transmission belt, a camera 332 installed on the fixing plate 331 for photographing the inner wall of the stator, a spray gun 334 for spraying high-pressure water on the inner wall of the stator, a high-pressure dry ice nozzle 333 for drying the water stains on the inner wall of the stator after cleaning, and a cylinder 335 for opening and closing the spray gun 334.

[0030] The control module 400 includes an electrical control box, a dry ice device, an air compressor for compressing the carbon dioxide gas produced by the dry ice device, a vacuum pump for guiding the compressed carbon dioxide gas to the high-pressure dry ice nozzle 333, and a power supply for the dry ice device, the air compressor, and the vacuum pump. The dry ice device includes a motor, a frequency converter for adjusting the motor speed, a dry ice refrigerator storing solid dry ice, a grinder for grinding and atomizing the solid dry ice in the dry ice refrigerator driven by the motor, a hose for passing the gaseous carbon dioxide into the high-pressure dry ice nozzle 333, and a pneumatic valve arranged on the hose for opening and closing the flow of carbon dioxide gas. The function of the dry ice device is to grind and atomize the added solid carbon dioxide, and then guide the gaseous carbon dioxide from the hose to the high-pressure dry ice nozzle 333 with the help of the connected low-pressure gas to finally spray it out. The dry ice device needs to be placed on the rotor and rotate with it, so the outer dimensions and panel direction layout of the dry ice device can be customized as needed. The dry ice refrigerator is used to store dry ice, and the bottom is a dry ice atomization machine. Through the rotating machine, the dry ice is quickly converted from solid to gas, and dry ice raw materials can be continuously provided.

[0031] It should be noted that due to the limited space for spraying on site, a nozzle that is efficient, short, has a large spray flow rate, and is easy to fix is ​​required. Finally, a universal duckbill nozzle was selected, which has a large spray flow rate and low noise. The nozzle direction can complete the 360° angle adjustment and fixing functions within a certain angle range. The high-pressure dry ice nozzle 333 is fixed by a special clamp adapted to the nozzle.

[0032] Air compressors and vacuum pumps are used to provide power for the flow and purge of dry ice. The air source of the air compressor can be an industrial on-site air source or a pressurized tank. The air source is equipped with a filter to prevent impurities in the gas from contaminating the stator.

[0033] Furthermore, the control module 400 also includes a collection box, and an air pump that guides the dust and water vapor recovered by the recovery hood 304 into the collection box. A filter is provided in the collection box for intercepting dust in the water vapor. The inner wall of the stator after flushing is blown dry by a high-pressure dry ice nozzle 333, and the recovery of dust and water vapor is achieved by using the recovery hood 304.

[0034] It should be noted that the electrical control box is mainly composed of a switching power supply, PLC, touch screen, servo drive, relay, and handle indicator light. PLC, as the core control unit, collects feedback signals from the actuator according to the set parameters and the selected motion mode, and completes the speed and displacement control of the servo motor. The design principle of electrical control is as follows: Figure 5 As shown, the external power supply is AC220V, which is converted into 24V by the switching power supply to power the PLC controller, human-machine interface, servo motor, sensor, etc.

[0035] Furthermore, the high-pressure water pump 600 delivers the water in the water tank 500 to the spray gun 334 through a water pipe. The high-pressure water pump 600 compresses the water source in the water tank 500 and delivers it to the spray gun 334 through the water pipe. The spray gun 334 sprays high-pressure water flow from top to bottom on the inner wall of the stator to achieve cleaning.

[0036] The working principle and usage process of the present invention are as follows: Remove a magnetic pole 200 on the rotor 100, then install the cleaning module 300, connect the cleaning module 300 to the control module 400, and then power on and start the machine for cleaning. The cleaning module 300 is composed of an electric sliding table 302, a camera 332, a high-pressure dry ice spray head 333, a spray gun 334, a recovery hood 304, etc. The high-pressure water pump 600 compresses the water source in the water tank 500 and delivers it to the spray gun 334 through the water pipe. The spray gun 334 sprays high-pressure water flow from top to bottom on the inner wall of the stator to achieve cleaning. At the same time, the carbon dioxide gas produced by the dry ice device is compressed by an air compressor and pumped into the high-pressure dry ice spray head 333 through a vacuum pump. The high-pressure dry ice spray head 333 dries the inner wall of the stator after cleaning. The recovery hood 304 is used to recover dust and water vapor. The camera 332 on the cleaning module 300 takes real-time photos for comparison, and then judges whether it is clear and clean. Driven by the electric sliding table 302, the spray gun 334 and the high-pressure dry ice spray head 333 move up and down to achieve the cleaning work of a single section.

[0037] In the present invention, the cleaning method of the cleaning module 300 adopts a top-down scheme. The spray gun 334 and the high-pressure dry ice spray head 333 cooperate with each other to clean from top to bottom. After cleaning one grid, the rotor 100 rotates to clean the next grid until the entire stator is cleaned. The cleaning method of the stator adopts a grid-dividing scheme. The inner wall of the stator is divided into multiple sections, and adjacent sections have a certain overlapping surface. Driven by the barring gear, the rotor 100 rotates one week, and each section of the stator is cleaned one by one by the cleaning module 300, so as to achieve the purpose of comprehensive cleaning.

[0038] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic internal cleaning machine for a generator, comprising a rotor (100) and magnetic poles (200) annularly distributed on the outer wall of the rotor (100), characterized in that: It also includes a cleaning module (300) installed in a replacement position at the location of one of the magnetic poles (200), a control module (400) arranged on the rotor (100), a water tank (500) and a high-pressure water pump (600); The cleaning module (300) comprises a mounting plate (301) fixed on the rotor (100), an electric slide (302) arranged on the mounting plate (301), a cleaning actuator (303) which can move up and down under the drive of the electric slide (302) to clean the inner wall of the stator, and a recovery cover (304) for recovering dust and water vapor cleaned by the cleaning actuator (303).

2. The automatic cleaning machine for the inside of a generator according to claim 1, characterized in that: The electric slide (302) comprises a servo motor, a coupling, a transmission belt driven by the servo motor to transmit the cleaning actuator (303) through the coupling, and a photoelectric position switch for positioning the cleaning actuator (303) when the transmission belt transmits the cleaning actuator (303).

3. The automatic generator internal cleaning machine according to claim 1, characterized in that: The cleaning actuator (303) comprises a fixing plate (331) fixed on a transmission belt, a camera (332) mounted on the fixing plate (331) for photographing the inner wall of the stator, a spray gun (334) for spraying high-pressure water flow on the inner wall of the stator, a high-pressure dry ice spray head (333) for drying water stains on the inner wall of the stator after cleaning, and a cylinder (335) for opening and closing the spray gun (334).

4. The automatic generator internal cleaning machine according to claim 3, characterized in that: The control module (400) comprises an electrical control box, a dry ice device, an air compressor for compressing carbon dioxide gas produced by the dry ice device, a vacuum pump for conveying the compressed carbon dioxide gas to a high-pressure dry ice nozzle (333), and a power source for supplying power to the dry ice device, the air compressor, and the vacuum pump.

5. The automatic generator internal cleaning machine according to claim 4, characterized in that: The control module (400) also includes a collection box and an air pump for guiding dust and water vapor collected by the recovery cover (304) into the collection box. A filter screen for intercepting dust in the water vapor is arranged in the collection box.

6. The automatic generator internal cleaning machine according to claim 4, characterized in that: The dry ice device comprises a motor, a frequency converter for regulating the motor speed, a dry ice bin storing solid dry ice, a grinder driven by the motor to grind and atomize the solid dry ice in the dry ice bin, a hose for passing gaseous carbon dioxide into a high-pressure dry ice nozzle (333), and a pneumatic valve arranged on the hose for opening and closing the flow of carbon dioxide gas.

7. The automatic generator internal cleaning machine according to claim 3, characterized in that: The high-pressure water pump (600) guides the water in the water tank (500) to the spray gun (334) through a water pipe.

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