Permanent magnet high-voltage vacuum switch for mine mobile substation

Abstract

The invention relates to a permanent magnet high-voltage vacuum switch for a mine mobile substation, and relates to the field of substation switching devices. The heat dissipation shell is fixedly arranged on the outer side of the switch body in a sleeving mode, and a heat exchange cavity is formed between the heat dissipation shell and the switch body; the air suction pipeline is arranged on the heat dissipation shell and communicates with the interior of the heat dissipation shell; the exhaust pipeline is arranged on the heat dissipation shell and communicates with the interior of the heat dissipation shell; the heat dissipation dust blocking mechanism is arranged between the air suction pipeline and the heat dissipation shell and used for discharging hot air in the heat exchange cavity, cooling the switch body and filtering airflow entering the heat exchange cavity. The high-voltage vacuum switch has the effects of improving the heat dissipation performance, the response accuracy and the service life of the high-voltage vacuum switch.

Description

Technical Field

[0001] The present application relates to the field of substation switchgear, and in particular to a permanent magnet high-voltage vacuum switch for a mine mobile substation. Background Art

[0002] The permanent magnet high-voltage vacuum switch for mine mobile substation is a high-voltage power equipment used in mine environment, with flameproof and mobile characteristics. It combines permanent magnet mechanism and vacuum arc extinguishing technology, and is mainly used on the high-voltage side of mine flameproof mobile substation to achieve infrequent on-off operation of dry-type transformers and the following equipment, and automatically disconnect the circuit in the event of overload, short circuit, undervoltage and other faults, to play a protective role.

[0003] At present, the permanent magnet high-voltage vacuum switch for mine mobile substation mainly includes a controller and display screen for monitoring and controlling the operating status of the switch, an incoming terminal for connecting the high-voltage power input, an isolating switch for realizing electrical isolation, a voltage transformer for measuring and monitoring the voltage on the high-voltage side, a vacuum arc extinguisher, a current transformer, a high-voltage power grid integrated protector, and a permanent magnet mechanism for changing the magnitude of the magnetic force by controlling the on-off of the current to realize the opening and closing operation of the circuit breaker; when the permanent magnet high-voltage vacuum switch is in use, the permanent magnet high-voltage vacuum switch is first installed on the high-voltage side of the mine mobile substation to ensure that it is correctly connected to the transformer and other equipment, and then electrical and mechanical debugging is carried out, and then the operator sends a start command through the controller. After receiving the command, the permanent magnet mechanism controls the on-off of the current and changes the magnitude of the magnetic force to make the circuit breaker The contacts are closed to connect the circuit. During operation, the operator needs to monitor the operating status of the switch through the controller and display screen, including parameters such as current, voltage, temperature, and the number and time of the switch's opening and closing. When the switch has faults such as overload, short circuit, undervoltage, etc., the high-voltage power grid integrated protector will automatically disconnect the circuit to protect the entire power system; however, the underground mine environment is dusty, and the surface of the switch is easily adsorbed with dust and impurities. If the dust and impurities cover the mechanical parts of the switch, such as permanent magnetic mechanisms, contacts, etc., it will increase friction and wear and affect the opening and closing operations of the switch. If the dust and impurities cover the electrical parts of the switch, such as voltage transformers, current transformers, etc., it will affect the accuracy of its measurement and monitoring, and the adsorbed dust and impurities will seriously affect the normal heat dissipation of the vacuum switch working in a high-voltage environment, affecting the normal operation and life of the switch. Summary of the invention

[0004] In order to improve the heat dissipation performance, response accuracy and service life of the high-voltage vacuum switch, the present application provides a permanent magnet high-voltage vacuum switch for a mine mobile substation.

[0005] The permanent magnetic high-voltage vacuum switch for a mine mobile substation provided in this application adopts the following technical solution: Permanent magnetic high-voltage vacuum switch for mine mobile substation, including: Switch body; A heat dissipation shell is fixedly mounted on the outside of the switch body, and a heat exchange chamber is formed between the heat dissipation shell and the switch body; An air suction duct is arranged on the heat dissipation shell and communicated with the interior of the heat dissipation shell; An exhaust duct is disposed in the heat dissipation housing and communicated with the interior of the heat dissipation housing; The heat dissipation and dust blocking mechanism is arranged between the air suction duct and the heat dissipation shell, and is used to discharge the hot air in the heat exchange chamber and cool the switch body, and filter the airflow entering the heat exchange chamber.

[0006] By adopting the above technical scheme, when the switch body generates heat during operation, hot air will accumulate in the heat exchange chamber. When the heat dissipation and dust blocking mechanism is started, the heat dissipation and dust blocking mechanism can, on the one hand, cool the switch body and control the temperature of the switch body to ensure the normal operation of the equipment in the harsh environment of the mine. On the other hand, the heat dissipation and dust blocking mechanism can also filter the airflow entering the heat exchange chamber to prevent dust and impurities from entering the switch body, thereby reducing maintenance requirements and extending the life of the equipment. At the same time, it ensures that the airflow entering the heat exchange chamber is clean and improves the heat dissipation efficiency. Among them, through the coordinated action of the heat exchange chamber, the suction duct and the heat dissipation and dust blocking mechanism, the switch body can be effectively isolated from the external environment, reducing the intrusion of dust. At the same time, it can guide the exchange of external cold air with the hot air in the heat exchange chamber, ensuring that the temperature of the switch body is controlled within a safe range, avoiding overheating and causing equipment failure, and improving the heat dissipation performance, response accuracy and service life of the high-voltage vacuum switch.

[0007] Optionally, the heat dissipation and dust blocking mechanism includes: A suction fan is arranged in the suction duct, and the suction duct and the exhaust duct are both provided with filter screens; A scraping assembly is arranged between the air suction duct and the filter screen on the air suction duct, and is used to scrape away dust and impurities adhering to the filter screen; The impurity removal component is arranged in the air suction duct and is used to collect and clean the dust and impurities scraped by the scraping component; The water-cooling heat dissipation component is arranged on the switch body and is used for dissipating heat of the switch body through cooling water.

[0008] By adopting the above technical scheme, the suction fan accelerates the intake of cold air, and the cold air enters the heat exchange chamber through the filter, exchanges heat with the switch body, absorbs heat and becomes hot air, and is discharged through the exhaust duct. At the same time, the scraping component and the impurity removal component work together to ensure the cleanliness of the filter and avoid the influence of dust and impurities on the switch body. The water-cooled heat dissipation component uses cooling water to dissipate heat for the switch body, absorbs heat from the outer wall of the switch body, and further improves the heat dissipation efficiency. After the heat dissipation and dust blocking mechanism has been running for a certain period of time, a large amount of dust will adhere to the outside of the filter on its suction duct. Through the coordinated action of the scraping component and the impurity removal component, the filter efficiency can be avoided from being reduced due to dust accumulation, thereby ensuring smooth airflow and heat dissipation effect, improving the reliability and safety of the equipment, and through the dual heat dissipation combination of air cooling and water cooling, the switch body can be more efficiently cooled, thereby adapting to the special needs in the mine environment.

[0009] Optionally, the scraping component includes: A rotating shaft, rotatably connected to the center of the filter screen; A brush is fixed on the rotating shaft; A transmission shaft is rotatably connected to the air suction duct and one end of which is located outside the air suction duct, wherein a driving motor is provided at the end of the transmission shaft located outside the air suction duct; The bevel gear set is arranged between the rotating shaft and the transmission shaft.

[0010] By adopting the above technical solution, when a large amount of dust adheres to the outside of the filter and needs to be scraped off, the drive motor is first started, and the drive motor drives the transmission shaft to rotate. The transmission shaft is connected to the rotating shaft through a bevel gear set. When the transmission shaft rotates, the bevel gear set transmits the rotational force to the rotating shaft, causing the rotating shaft to start rotating. Then the brush fixed on the rotating shaft contacts and scrapes off the dust and impurities adhered to the filter as the rotating shaft rotates, and then the dust removal component cleans it. The staff can use the scraping component to automatically and regularly remove dust and impurities on the filter to avoid the filter efficiency being reduced due to blockage, thereby ensuring smooth airflow and improving heat dissipation.

[0011] Optionally, the scraping component further includes: A gas flow sensor is arranged in the air suction duct to detect the flow of gas in the air suction duct and send out a gas flow signal; The scraping controller is connected to the gas flow sensor and the drive motor, and is used to receive the gas flow signal to obtain the gas flow in the suction duct. When the gas flow is less than the preset flow, the scraping controller sends a control signal to the drive motor so that the drive motor drives the brush to operate.

[0012] By adopting the above technical solution, the gas flow sensor is used to detect the flow of gas in the suction duct in real time. When the gas flow is less than the preset flow, the scraper controller will send a control signal to the drive motor. After receiving the control signal, the drive motor starts and drives the brush to operate, thereby removing dust and impurities accumulated on the inner wall of the suction duct and increasing the flow rate of external cold air entering. The scraper component can operate automatically to realize real-time monitoring and automatic cleaning of the gas flow in the suction duct, thereby maintaining smooth flow of gas in the suction duct and avoiding a decrease in gas flow efficiency due to duct blockage.

[0013] Optionally, the impurity removal component includes: A collecting box is arranged below the air suction duct, and an opening is provided at the bottom of the collecting box; An end cover is arranged at the opening at the bottom of the collection box; The self-opening and closing component is arranged between the end cover and the collection box, and is used for automatically opening the end cover to clean the dust and impurities in the collection box.

[0014] By adopting the above technical solution, the dust and impurities scraped by the scraping component fall into the collection box arranged under the suction duct due to gravity. The collection box serves as a temporary storage space for dust and impurities. When the dust and impurities in the collection box accumulate to a certain amount, the self-opening and closing component will automatically open, so that the end cover opens, and the dust and impurities are discharged through the opening at the bottom of the end cover. After the cleaning process is completed, the self-opening and closing component will automatically close to prevent dust from entering again.

[0015] Optionally, a collecting hopper is fixedly provided between the collecting box and the air suction duct, and the collecting hopper is arranged in a contracted shape from top to bottom.

[0016] By adopting the above technical solution, the contraction-shaped setting can, on the one hand, guide the dust and impurities scraped from the scraping component to smoothly enter the collection box; on the other hand, the contraction-shaped setting can also reduce the suspension time of the dust and impurities in the airflow, making it difficult for the dust and impurities to be brought into the suction duct again by the airflow, thereby reducing dust reflux.

[0017] Optionally, the self-opening and closing component includes: A hinge shaft is fixed to the end cover; The brake motor is arranged at one end of the articulated shaft; A weight detection sensor is arranged on the end cover, and is used to detect the weight of dust and impurities in the collection box and send out a weight detection signal; The opening and closing controller is connected to the weight detection sensor and the brake motor, and is used to receive the weight detection signal to know the weight of the dust and impurities in the collection box. When the weight of the dust and impurities in the collection box is greater than the preset weight, the opening and closing controller sends a control signal to the brake motor to make the brake motor open the end cover.

[0018] By adopting the above technical solution, the weight detection sensor continuously monitors the weight of the dust and impurities in the collection box. When the weight of the dust and impurities in the collection box reaches the preset weight, the weight detection sensor sends a weight detection signal to the opening and closing controller. The opening and closing controller determines that the weight of the dust and impurities in the collection box has reached the preset weight, and then sends a control signal to the brake motor. After receiving the control signal, the brake motor drives the hinge shaft to rotate, so that the end cover opens, and the dust and impurities are discharged from the opening at the bottom of the collection box, completing the automatic cleaning process; wherein the self-opening and closing component can automatically open the end cover according to the weight of the dust and impurities in the collection box, realize automatic cleaning, reduce the frequency of manual maintenance, and the brake motor has a self-locking property, which can maintain the closed state of the end cover for a long time without power input after power failure, saving energy.

[0019] Optionally, the water cooling component includes: A water tank is arranged outside the switch body; The heat exchange pipe is laid on the outer wall of the switch body, and both ends are connected to the water tank; The circulation pump is arranged in the heat exchange pipe.

[0020] By adopting the above technical solution, after the circulating pump is started, it pushes the cooling water in the water tank to circulate through the heat exchange pipe. The cooling water contacts the outer wall of the switch body in the heat exchange pipe, and absorbs the heat generated by the switch body during operation. The water-cooled heat dissipation component can absorb and dissipate the heat generated by the switch body during operation, improve the heat dissipation efficiency, and ensure the stable operation of the equipment in the high-temperature environment underground.

[0021] Optionally, the suction duct is provided with a plurality of groups of filter screens, scraping components and impurity removal components along its length direction.

[0022] By adopting the above technical solution, multiple groups of filter screens can perform multi-stage filtration on the air entering the heat exchange chamber, thereby improving the cleanliness of the air in the heat exchange chamber and extending the maintenance cycle.

[0023] Optionally, a plurality of heat sinks are fixedly disposed on the outer side of the switch body.

[0024] By adopting the above technical solution, the heat sink can increase the heat dissipation area of ​​the outer wall of the switch body, accelerate the heat dissipation inside the switch body, and improve the heat dissipation efficiency.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: Through the cooperation of the heat exchange chamber, the air suction duct and the heat dissipation and dust blocking mechanism, the switch body can be effectively isolated from the external environment, reducing the intrusion of dust. At the same time, it can guide the exchange of cold air from the outside and hot air in the heat exchange chamber, ensuring that the temperature of the switch body is controlled within a safe range, avoiding equipment failure caused by overheating, and improving the heat dissipation performance, response accuracy and service life of the high-voltage vacuum switch; When the heat dissipation and dust blocking mechanism has been running for a certain period of time, a large amount of dust will adhere to the outside of the filter on the suction duct. The synergistic effect of the scraping component and the impurity removal component can prevent the filter from reducing the filtration efficiency due to dust accumulation, ensure the smooth flow of air and the heat dissipation effect, improve the reliability and safety of the equipment, and through the dual heat dissipation combination of air cooling and water cooling, the switch body can dissipate heat more efficiently, thus meeting the special needs in the mine environment; The gas flow sensor is used to detect the flow of gas in the suction duct in real time. When the gas flow is less than the preset flow, the scraper controller will send a control signal to the drive motor. After receiving the control signal, the drive motor starts and drives the brush to operate, thereby removing dust and impurities accumulated on the inner wall of the suction duct and increasing the flow rate of external cold air entering. The scraper component can operate automatically to realize real-time monitoring and automatic cleaning of the gas flow in the suction duct, thereby maintaining smooth flow of gas in the suction duct and avoiding a decrease in gas flow efficiency due to duct blockage. When the dust and impurities in the collection box accumulate to a certain amount, the self-opening and closing component will automatically open, allowing the end cover to open, and the dust and impurities will be discharged through the opening at the bottom of the end cover. After the cleaning process is completed, the self-opening and closing component will automatically close to prevent dust from entering again, and the collecting hopper is set in a contraction shape from top to bottom. On the one hand, the contraction shape can guide the dust and impurities scraped from the scraping component to smoothly enter the collection box. On the other hand, the contraction shape can also reduce the suspension time of dust and impurities in the airflow, making it difficult for dust and impurities to be brought into the suction duct again by the airflow, thereby reducing dust reflux. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a permanent magnetic high-voltage vacuum switch for a mine mobile substation in this application; Figure 2 It is a partial cross-sectional schematic diagram showing a permanent magnetic high-voltage vacuum switch for a mine mobile substation; Figure 3 It is a partial cross-sectional view showing the heat dissipation and dust blocking mechanism; Figure 4 Yes means Figure 3 Schematic diagram of the local enlarged structure of part A.

[0027] Explanation of the reference numerals: 1. switch body; 2. heat dissipation housing; 3. heat exchange chamber; 4. suction duct; 5. exhaust duct; 6. heat dissipation and dust blocking mechanism; 61. suction fan; 62. filter; 63. scraping assembly; 631. rotating shaft; 632. brush; 633. transmission shaft; 634. driving motor; 635. bevel gear set; 64. impurity removal assembly; 641. collecting box; 642. end cover; 643. collecting hopper; 644. self-opening and closing component; 6441. hinged shaft; 6442. brake motor; 65. water-cooled heat dissipation assembly; 651. water tank; 652. heat exchange duct; 653. circulating pump; 7. heat sink. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-Figure 4 This application is described in further detail.

[0029] The present application embodiment discloses a permanent magnetic high voltage vacuum switch for a mine mobile substation. Figure 1 and Figure 2 The permanent magnetic high-voltage vacuum switch includes a switch body 1; a heat dissipation shell 2 is fixedly sleeved on the outside of the switch body 1, and the heat dissipation shell 2 and the switch body 1 are spaced apart to form a heat exchange chamber 3. An air suction duct 4 and an air exhaust duct 5 are arranged on the heat dissipation shell 2, and the air suction duct 4 and the air exhaust duct 5 are both connected to the inside of the heat dissipation shell 2. A heat dissipation dust blocking mechanism 6 is arranged between the air suction duct 4 and the heat dissipation shell 2, and the heat dissipation dust blocking mechanism 6 is used to discharge the hot air in the heat exchange chamber 3 and cool the switch body 1, as well as filter the airflow entering the heat exchange chamber 3. A plurality of heat sinks 7 are also fixedly arranged on the outside of the switch body 1, and the heat sinks 7 are used to increase the heat dissipation area of ​​the outer wall of the switch body 1, accelerate the heat dissipation inside the switch body 1, and improve the heat dissipation efficiency.

[0030] When the switch body 1 generates heat during operation, hot air will accumulate in the heat exchange chamber 3. When the heat dissipation and dust blocking mechanism 6 is started, the heat dissipation and dust blocking mechanism 6 can, on the one hand, cool the switch body 1 and control the temperature of the switch body 1 to ensure the normal operation of the equipment in the harsh environment of the mine. On the other hand, the heat dissipation and dust blocking mechanism 6 can also filter the airflow entering the heat exchange chamber 3 to prevent dust and impurities from entering the switch body 1, thereby reducing maintenance requirements and extending equipment life. At the same time, it ensures that the airflow entering the heat exchange chamber 3 is clean and improves heat dissipation efficiency.

[0031] In some embodiments, reference Figure 2 and Figure 3The heat dissipation and dust blocking mechanism 6 includes a suction fan 61 arranged on the suction duct 4. The suction duct 4 and the exhaust duct 5 are both provided with a filter 62, and the suction duct 4 is provided with multiple filters 62, illustratively, preferably three. A scraping component 63 is arranged between the suction duct 4 and the filter 62 on the suction duct 4, and the scraping component 63 is used to scrape off dust and impurities adhered to the filter 62. The suction duct 4 is provided with a dust removal component 64, and the dust removal component 64 is used to collect and clean the dust and impurities scraped by the scraping component 63. A water-cooled heat dissipation component 65 is arranged on the switch body 1, and the water-cooled heat dissipation component 65 is used to dissipate heat from the switch body 1 through cooling water.

[0032] The suction fan 61 accelerates the intake of cold air, and the cold air enters the heat exchange chamber 3 through the filter 62, exchanges heat with the switch body 1, absorbs heat and becomes hot air, and is discharged through the exhaust duct 5. At the same time, the scraping component 63 and the impurity removal component 64 work together to ensure the cleanliness of the filter 62 and avoid the influence of dust and impurities on the switch body 1. The water-cooled heat dissipation component 65 dissipates heat for the switch body 1 through cooling water, absorbs the heat of the outer wall of the switch body 1, and further improves the heat dissipation efficiency.

[0033] When the heat dissipation and dust blocking mechanism 6 has been running for a certain period of time, a large amount of dust will adhere to the outside of the filter 62 on the suction duct 4. Through the synergistic effect of the scraping component 63 and the impurity removal component 64, the filter efficiency of the filter 62 can be prevented from being reduced due to dust accumulation, thereby ensuring smooth airflow and heat dissipation effect.

[0034] In some embodiments, reference Figure 3 and Figure 4 The scraping assembly 63 includes a rotating shaft 631 rotatably connected to the center of the filter 62, and a brush 632 is fixed on the rotating shaft 631, and the brush 632 abuts against the filter 62. A transmission shaft 633 is rotatably connected to the suction duct 4, one end of the transmission shaft 633 is located outside the suction duct 4, and a driving motor 634 is provided at one end of the transmission shaft 633 located outside the suction duct 4. A bevel gear set 635 for transmission is provided between the rotating shaft 631 and the transmission shaft 633. The scraping assembly 63 also includes a gas flow sensor and a scraping controller. The gas flow sensor is provided in the suction duct 4, and is used to detect the flow of gas in the suction duct 4 and send a gas flow signal. The scraping controller is connected to the gas flow sensor and the driving motor 634, and is used to receive the gas flow signal to know the gas flow in the suction duct 4. When the gas flow is less than the preset flow, the scraping controller sends a control signal to the driving motor 634, so that the driving motor 634 drives the brush 632 to operate.

[0035] The gas flow sensor is used to detect the flow of gas in the suction duct 4 in real time. When a large amount of dust adheres to the outside of the filter 62, the gas flow will be less than the preset flow. At this time, the scraper controller will send a control signal to the drive motor 634. The drive motor 634 drives the transmission shaft 633 to rotate. The transmission shaft 633 is connected to the rotating shaft 631 through the bevel gear set 635. When the transmission shaft 633 rotates, the bevel gear set 635 transmits the rotational force to the rotating shaft 631, so that the rotating shaft 631 starts to rotate. Then the brush 632 fixed on the rotating shaft 631 scrapes off the dust and impurities adhered to the filter 62 as the rotating shaft 631 rotates, and then the impurity removal component 64 cleans it. The scraper component 63 can operate automatically to realize real-time monitoring and automatic cleaning of the gas flow in the suction duct 4, thereby maintaining the smooth flow of gas in the suction duct 4 and avoiding the decrease in gas flow efficiency due to pipeline blockage.

[0036] In some embodiments, reference Figure 2 and Figure 3 The impurity removal component 64 includes a collection box 641 disposed below the air suction duct 4. The collection box 641 has an opening at the bottom, and an end cover 642 is disposed at the opening at the bottom of the collection box 641. A collecting hopper 643 is fixedly disposed between the collection box 641 and the air suction duct 4. The collecting hopper 643 is arranged in a contracted shape from top to bottom. The contracted shape is used to guide the dust and impurities scraped from the scraping component 63 to smoothly enter the collection box 641, and at the same time reduce the suspension time of the dust and impurities in the airflow, so that the dust and impurities are not easily brought into the air suction duct 4 again by the airflow, thereby reducing dust reflux. A self-opening and closing component 644 is disposed between the end cover 642 and the collection box 641. The self-opening and closing component 644 is used to automatically open the end cover 642 to clean the dust and impurities in the collection box 641.

[0037] The dust and impurities scraped off by the scraping component 63 fall into the collecting box 641 arranged under the suction duct 4 due to gravity. The collecting box 641 serves as a temporary storage space for dust and impurities. When the dust and impurities in the collecting box 641 accumulate to a certain amount, the self-opening and closing component 644 will automatically open, so that the end cover 642 will open, and the dust and impurities will be discharged through the opening at the bottom of the end cover 642. After the cleaning process is completed, the self-opening and closing component 644 will automatically close to prevent dust from entering again.

[0038] In some embodiments, reference Figure 2 and Figure 3The self-opening and closing component 644 includes a hinge shaft 6441 fixed to one side of the end cover 642, and a brake motor 6442 is provided at one end of the hinge shaft 6441. It also includes a weight detection sensor and an opening and closing controller, wherein the weight detection sensor is provided on the end cover 642, and is used to detect the weight of dust impurities in the collection box 641 and send a weight detection signal. The opening and closing controller is connected to the weight detection sensor and the brake motor 6442, and is used to receive the weight detection signal to know the weight of dust impurities in the collection box 641. When the weight of dust impurities in the collection box 641 is greater than the preset weight, the opening and closing controller sends a control signal to the brake motor 6442, so that the brake motor 6442 opens the end cover 642.

[0039] The weight detection sensor continuously monitors the weight of the dust and impurities in the collection box 641. When the weight of the dust and impurities in the collection box 641 reaches the preset weight, the weight detection sensor sends a weight detection signal to the opening and closing controller. The opening and closing controller determines that the weight of the dust and impurities in the collection box 641 has reached the preset weight, and then sends a control signal to the brake motor 6442. After receiving the control signal, the brake motor 6442 drives the hinge shaft 6441 to rotate, so that the end cover 642 opens, and the dust and impurities are discharged from the opening at the bottom of the collection box 641, completing the automatic cleaning process.

[0040] In some embodiments, reference Figure 2 and Figure 3 The water cooling component 65 includes a water tank 651 disposed outside the switch body 1. A heat exchange pipe 652 is laid on the outer wall of the switch body 1. Both ends of the heat exchange pipe 652 are connected to the water tank 651. A circulation pump 653 is also disposed on the heat exchange pipe 652.

[0041] After the circulation pump 653 is started, it pushes the cooling water in the water tank 651 to circulate through the heat exchange pipe 652. The cooling water contacts the outer wall of the switch body 1 in the heat exchange pipe 652 to absorb the heat generated by the switch body 1 during operation.

[0042] The implementation principle of a permanent magnet high-voltage vacuum switch for a mobile substation in a mine according to an embodiment of the present application is as follows: when the switch body 1 generates heat during operation, hot air will accumulate in the heat exchange chamber 3. When the heat dissipation and dust blocking mechanism 6 is started, the heat dissipation and dust blocking mechanism 6 can, on the one hand, cool the switch body 1, control the temperature of the switch body 1, and ensure the normal operation of the equipment in the harsh environment of the mine. On the other hand, the heat dissipation and dust blocking mechanism 6 can also filter the airflow entering the heat exchange chamber 3 to prevent dust and impurities from entering the switch body 1, thereby reducing maintenance requirements and extending the life of the equipment. At the same time, it ensures that the airflow entering the heat exchange chamber 3 is clean and improves the heat dissipation efficiency. The cooperation of the heat exchange chamber 3, the air suction duct 4 and the heat dissipation and dust blocking mechanism 6 can effectively isolate the switch body 1 from the external environment, reduce the intrusion of dust, and guide the exchange of external cold air with the hot air in the heat exchange chamber 3, ensuring that the temperature of the switch body 1 is controlled within a safe range, avoiding overheating and causing equipment failure, and improving the heat dissipation performance, response accuracy and service life of the high-voltage vacuum switch.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. Permanent magnet high voltage vacuum switch for mine mobile substation, characterized in that: include: Switch body (1); A heat dissipation shell (2) is fixedly sleeved on the outside of the switch body (1), and a heat exchange chamber (3) is formed between the heat dissipation shell (2) and the switch body (1); An air suction duct (4) is disposed on the heat dissipation housing (2) and is in communication with the interior of the heat dissipation housing (2); An exhaust duct (5) is disposed on the heat dissipation housing (2) and is in communication with the interior of the heat dissipation housing (2); The heat dissipation and dust blocking mechanism (6) is arranged between the air suction duct (4) and the heat dissipation housing (2), and is used to discharge hot air in the heat exchange chamber (3) and cool the switch body (1), as well as filter the airflow entering the heat exchange chamber (3).

2. The permanent magnet high-voltage vacuum switch for a mine mobile substation according to claim 1 is characterized in that: The heat dissipation and dust blocking mechanism (6) comprises: A suction fan (61) is arranged in the suction duct (4), and a filter screen (62) is arranged on both the suction duct (4) and the exhaust duct (5); A scraping assembly (63) is disposed between the air suction duct (4) and the filter screen (62) on the air suction duct (4) and is used to scrape off dust and impurities adhering to the filter screen (62); A dust removal component (64) is arranged in the air suction duct (4) and is used to collect and clean dust and impurities scraped off by the scraping component (63); The water-cooling heat dissipation component (65) is arranged on the switch body (1) and is used to dissipate heat from the switch body (1) through cooling water.

3. The permanent magnetic high-voltage vacuum switch for a mine mobile substation according to claim 2 is characterized in that: The scraping assembly (63) comprises: A rotating shaft (631) rotatably connected to the center of the filter screen (62); A brush (632) is fixed on the rotating shaft (631); A transmission shaft (633) is rotatably connected to the air suction duct (4) and one end of which is located outside the air suction duct (4); a driving motor (634) is provided at the end of the transmission shaft (633) located outside the air suction duct (4); The bevel gear set (635) is arranged between the rotating shaft (631) and the transmission shaft (633).

4. The permanent magnetic high-voltage vacuum switch for a mine mobile substation according to claim 3 is characterized in that: The scraping assembly (63) further comprises: A gas flow sensor is arranged in the air suction duct (4) and is used to detect the flow of gas in the air suction duct (4) and to send out a gas flow signal; The scraping controller is connected to the gas flow sensor and the driving motor (634) and is used to receive a gas flow signal to obtain the gas flow in the suction duct (4). When the gas flow is less than a preset flow, the scraping controller sends a control signal to the driving motor (634) so ​​that the driving motor (634) drives the brush (632) to operate.

5. The permanent magnetic high-voltage vacuum switch for a mine mobile substation according to claim 2, characterized in that: The impurity removal component (64) comprises: A collecting box (641) is arranged below the air suction duct (4), and an opening is provided at the bottom of the collecting box (641); An end cover (642) is disposed at an opening at the bottom of the collection box (641); The self-opening and closing component (644) is arranged between the end cover (642) and the collection box (641) and is used to automatically open the end cover (642) to clean the dust and impurities in the collection box (641).

6. The permanent magnetic high-voltage vacuum switch for a mine mobile substation according to claim 5, characterized in that: A material collecting hopper (643) is fixedly provided between the collecting box (641) and the air suction duct (4), and the material collecting hopper (643) is arranged in a contracted shape from top to bottom.

7. The permanent magnetic high-voltage vacuum switch for a mine mobile substation according to claim 5, characterized in that: The self-opening and closing component (644) comprises: A hinge shaft (6441) is fixed to the end cover (642); A brake motor (6442) is arranged at one end of the hinge shaft (6441); A weight detection sensor, arranged on the end cover (642), for detecting the weight of dust and impurities in the collection box (641) and sending a weight detection signal; An opening and closing controller is connected to the weight detection sensor and the brake motor (6442) and is used to receive a weight detection signal to obtain the weight of dust impurities in the collection box (641); when the weight of dust impurities in the collection box (641) is greater than a preset weight, the opening and closing controller sends a control signal to the brake motor (6442) so that the brake motor (6442) opens the end cover (642).

8. The permanent magnetic high-voltage vacuum switch for a mine mobile substation according to claim 2, characterized in that: The water cooling and heat dissipation component (65) comprises: A water tank (651) is arranged outside the switch body (1); The heat exchange pipe (652) is laid on the outer wall of the switch body (1), and its two ends are connected to the water tank (651); The circulation pump (653) is arranged in the heat exchange pipe (652).

9. The permanent magnetic high-voltage vacuum switch for a mine mobile substation according to claim 2, characterized in that: The air suction duct (4) is provided with a plurality of groups of filter screens (62), scraping components (63) and impurity removal components (64) along its length direction.

10. The permanent magnetic high-voltage vacuum switch for a mine mobile substation according to any one of claims 1 to 9, characterized in that: A plurality of heat sinks (7) are also fixedly disposed on the outside of the switch body (1).

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