High-voltage switch cabinet convenient for monitoring circuit breaker contact and monitoring method thereof

Abstract

The invention relates to the technical field of switch cabinets, in particular to a high-voltage switch cabinet facilitating monitoring of a circuit breaker contact and a monitoring method thereof.The high-voltage switch cabinet comprises a switch cabinet body, a water tank used for humidifying air around the switch cabinet body is arranged at the bottom of the switch cabinet body, and a mounting groove is formed in the switch cabinet body; and two switch mounting racks for mounting electrical elements are fixedly connected in the mounting groove. According to the invention, through the arrangement of the monitoring assembly, the conductive column is separated from the fixed contact after descending, and then the electrical element is powered off, so that on one hand, power-off protection is performed on the electrical element to prevent the electrical element from being damaged, and on the other hand, fire caused by overheating of the electrical element can be avoided; real-time monitoring can be carried out in the working process of the electrical element through the thermistor, the defect that the manufacturing cost of traditional monitoring equipment is high is avoided through monitoring of the thermistor, and the cost can be effectively saved.

Description

Technical Field

[0001] The invention relates to the field of switch cabinets, and in particular to a high-voltage switch cabinet and a monitoring method thereof which are convenient for monitoring circuit breaker contacts. Background Art

[0002] Switchgear is an electrical equipment, which is mainly used to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and energy conversion in the power system. The components in the switchgear mainly include circuit breakers, disconnectors, load switches, operating mechanisms, transformers and various protection devices.

[0003] The patent with publication number CN216850917U discloses an intelligent high-voltage switch cabinet that is easy to maintain inside, including an intelligent high-voltage switch cabinet, the top of which is movably connected to a cover plate via a hinge, and the front sides of both sides of the cover plate are fixedly connected to limit blocks.

[0004] However, the above switch cabinet still has certain defects when in use. During the use of the switch cabinet, the electrical components inside it will heat up, and the electrical components will be damaged if they overheat. Therefore, it is necessary to monitor whether the electrical components are overheating, and to cut off the power in time when the electrical components are overheated to protect the electrical components and avoid the risk of fire caused by overheating of the electrical components. Secondly, during the use of the switch cabinet, if the air is too dry, static electricity is easily generated, which poses certain safety hazards. During the process of repairing the switch cabinet, maintenance personnel also have the risk of being injured by the static electricity in the switch cabinet. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings existing in the prior art and to propose a high-voltage switch cabinet and a monitoring method thereof which are convenient for monitoring circuit breaker contacts.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: a high-voltage switchgear that is convenient for monitoring circuit breaker contacts, including a switchgear cabinet body, a water tank for humidifying the surrounding air is arranged at the bottom of the switchgear cabinet body, an installation groove is opened inside the switchgear cabinet body, two switch mounting frames for mounting electrical components are fixedly connected in the installation groove, a door panel is hinged on one side of the installation groove, and a plurality of air outlet nozzles for dissipating heat to the switch mounting frame are arranged on the side of the installation groove away from the door panel, and a monitoring component is also arranged inside the switchgear cabinet body.

[0007] Preferably, a first mounting frame and a second mounting frame are arranged below the switch mounting frame, the first mounting frame is located above the second mounting frame, both the first mounting frame and the second mounting frame are provided with built-in wires, the first mounting frame and the second mounting frame are fixedly connected to the wall panel of the switch cabinet body away from the door panel on the side away from the door panel through a support rod, a fixed contact is fixedly connected at the center of the first mounting frame, the fixed contact is electrically connected to the built-in wire of the first mounting frame, the built-in wire of the first mounting frame is electrically connected to external alternating current, the built-in wire of the second mounting frame is electrically connected to electrical components on the switch mounting frame, a conductive column is slidably connected at the center of the second mounting frame, the conductive column is electrically connected to the built-in wire of the second mounting frame, the conductive column is movably abutted against the fixed contact, and the monitoring component is used to disconnect the electrical connection between the conductive column and the fixed contact.

[0008] Preferably, a ring plate is fixedly sleeved on the top outer wall of the conductive column, a reset spring is fixedly connected to the bottom of the ring plate, one end of the reset spring away from the ring plate is fixedly connected to the top wall plate of the second mounting frame, one side of the second mounting frame is fixedly connected to a connecting frame with an inverted "L"-shaped cross-section, the horizontal end of the connecting frame is fixedly connected to the side wall of the second mounting frame, the vertical end of the connecting frame is fixedly connected to an elastic member, the end of the elastic member away from the connecting frame is fixedly connected to a clamping rod, the clamping rod passes through the side wall of the second mounting frame, and a clamping slot is opened on the side wall of the conductive column, and the clamping rod is movably clamped in the clamping slot.

[0009] Preferably, the monitoring component includes heat conducting plates fixedly connected to the bottom of the two switch mounting frames, a partition is arranged between the water tank and the mounting tank, an iron rod is fixedly sleeved at the center of the partition, the bottom end of the iron rod passes through the partition and extends to the bottom of the water tank, a coil is wound around the outside of the iron rod, a thermistor is fixedly connected to one end of the heat conducting plate, the two thermistors are connected in series, and then in series with the coil, and after being connected in series, the two thermistors are electrically connected to an external independent power supply.

[0010] Preferably, a humidity sensor is fixedly connected to one side of the door panel close to the switch mounting frame located at the bottom of the mounting groove, and the humidity sensor is used to monitor the humidity of the air inside the mounting groove. A door frame is opened on one side wall panel of the mounting groove, and the door panel is hinged in the door frame. A rectangular airbag is embedded in the wall panel of the door frame, and the airbag abuts against the side wall of the door panel. The bottom of the airbag is connected to a vertical pipe, and the end of the vertical pipe away from the airbag is connected to a gas filling port, and the gas filling port is located on the outside of the switch cabinet body.

[0011] Preferably, an air pump is fixedly connected to the outer wall of the switch cabinet body at one end away from the door panel, the output end of the air pump is connected to an output pipe, the end of the output pipe away from the air pump is connected to an internal pipe, the internal pipe is arranged in the wall panel of the switch cabinet body at one end away from the door panel, two transverse grooves are arranged inside the wall panel of the switch cabinet body at one end away from the door panel, the two transverse grooves are respectively located above the two switch mounting frames, the two ends of the internal pipe are respectively connected to the two transverse grooves, the connection point between the output pipe and the internal pipe is located in the middle section of the internal pipe, the side of the transverse groove close to the door panel is connected to multiple air outlet nozzles, the multiple air outlet nozzles connected by the two transverse grooves are respectively facing above the two switch mounting frames.

[0012] Preferably, an air outlet is provided on the wall panel on one side of the partition close to the door panel, the air outlet is connected to the mounting groove and an air pressure valve is provided at the connection between the two, the end of the air outlet away from the mounting groove is connected to an electromagnetic three-way valve, the electromagnetic three-way valve is a one-inlet and two-outlet three-way valve, and its two output ends are respectively connected to an air outlet pipe and a built-in conduit, the air outlet pipe extends to the bottom of the sink, and a rectangular opening is provided on the side of the top of the sink away from the door panel, the rectangular opening is used to discharge the gas entering the sink, a cotton board is fixedly connected to the top wall panel of the rectangular opening, and the input end of the air pump is located above the cotton board.

[0013] Preferably, the built-in conduit is opened inside the partition, and the end of the built-in conduit away from the electromagnetic three-way valve is connected to a guide tube, and the end of the guide tube away from the built-in conduit faces the side of the cotton board, and the electromagnetic three-way valve is communicatively connected with the humidity sensor.

[0014] Preferably, one end of the door panel is fixedly connected to two hinges, and the two hinges are respectively fixedly connected to the wall panel of the door frame away from the installation groove. A clamping plate is movably connected to the center of the end of the door panel away from the hinge, and a rectangular ring is fixedly connected to the center of the end of the door frame away from the hinge. The inside of the rectangular ring is slidably connected with a clamping plate, and the clamping plate is movably clamped to the wall panel of the door panel away from the hinge.

[0015] Preferably, a monitoring method for a high-voltage switch cabinet for monitoring circuit breaker contacts comprises the following steps:

[0016] Step 1: After installing the electrical components on the two switch mounting frames, close the door panel, and after the door panel is closed, clamp the clamping plate and the door panel, and then inflate the airbag through the air filling port so that the airbag seals the door panel and the door frame;

[0017] Step 2: During the operation of the switch cabinet, the electrical components on the switch mounting frame will generate heat, and the heat will be transferred to the thermistor through the heat conducting plate. The resistance of the thermistor will decrease due to the heat, thereby increasing the current in the coil and enhancing the magnetism of the iron rod, thereby separating the fixed contact from the conductive column, protecting the electrical components from overheating, and monitoring the electrical components from overheating through the thermistor.

[0018] Step 3: Use the air pump to dissipate heat from the electrical components on the switch mounting frame, use the water tank to humidify the surrounding air, and use the humidity sensor to detect the humidity inside the switch cabinet.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention sets a monitoring component, which will separate from the fixed contact after the conductive column descends, thereby cutting off the power to the electrical components. On the one hand, the electrical components are protected from damage, and on the other hand, it can also help avoid fires caused by overheating of the electrical components. The thermistor can be used to monitor the electrical components in real time during their operation. The monitoring by the thermistor avoids the disadvantage of expensive traditional monitoring equipment, which can effectively save costs.

[0021] 2. The present invention sets a monitoring component. After the clamping rod is clamped with the clamping slot, the bottom end of the conductive column will contact the iron rod, and the static electricity on the electrical components on the switch mounting frame will be guided to the water tank through the iron rod, and then connected to the ground through the water tank, which is conducive to eliminating static electricity. In addition, through the setting of the air outlet pipe, the air outlet pipe will increase the oxygen content of the water in the water tank, thereby increasing the ion content in the water tank. The increase in the ion content in the water can also help neutralize the static electricity charge, further reduce the static electricity in the electrical components, and help avoid the situation where maintenance personnel are injured by the static electricity in the switch cabinet when repairing the switch cabinet.

[0022] 3. The present invention makes the gas contain a certain amount of moisture by the contact between the gas and the water in the water tank, thereby effectively humidifying the gas. The humidified gas is then discharged through the rectangular opening. After the gas is discharged through the rectangular opening, it can effectively humidify the air around the switch cabinet body, thereby reducing the probability of static electricity generated by the electrical components inside the installation slot by humidification.

[0023] 4. The present invention sets an air pump. By turning on the air pump, the air pump will supply air into the output pipe. After the gas enters the output pipe, it will flow to the two horizontal grooves through the built-in pipe. Then the gas will be sprayed above the switch mounting frame through multiple air outlet nozzles. The flow of air flow is used to dissipate the heat of the electrical components installed on the switch mounting frame, which is beneficial to avoid damage to the electrical components on the switch mounting frame due to overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall structure of the present invention from another perspective;

[0026] Figure 3 For the present invention Figure 2 An enlarged schematic diagram of the structure of section A is shown;

[0027] Figure 4 It is a schematic cross-sectional view of the structure of the switch cabinet body of the present invention;

[0028] Figure 5 For the present invention Figure 4 An enlarged schematic diagram of the structure of part B is shown;

[0029] Figure 6 For the present invention Figure 4 An enlarged schematic diagram of the C-section structure is shown;

[0030] Figure 7 For the present invention Figure 4 An enlarged schematic diagram of the D-section structure is shown;

[0031] Figure 8 It is a schematic cross-sectional view of the structure of the switch mounting frame of the present invention;

[0032] Fig. 9 For the present invention Figure 8 An enlarged schematic diagram of the structure of part E is shown;

[0033] Fig.10 For the present invention Figure 4 The enlarged schematic diagram of the F part structure is shown;

[0034] Fig.11 It is a schematic cross-sectional view of the structure of the built-in catheter of the present invention;

[0035] Fig.12 The figure is a connection circuit diagram of the thermistor and the coil of the present invention.

[0036] In the figure: 1. switch cabinet body; 2. door panel; 3. rectangular ring; 4. card plate; 5. air filling port; 6. cotton board; 7. rectangular port; 8. guide tube; 9. iron rod; 10. switch mounting frame; 11. humidity sensor; 12. air pump; 13. output pipe; 14. built-in pipe; 15. horizontal groove; 16. air outlet nozzle; 17. electromagnetic three-way valve; 18. air pressure valve; 19. air outlet pipe; 20. water tank; 21. mounting groove; 22. air bag; 23. first mounting frame; 24. second mounting frame; 25. conductive column; 26. fixed contact; 27. ring plate; 28. reset spring; 29. ​​heat conducting plate; 30. thermistor; 31. coil; 32. built-in conduit; 33. card rod; 34. elastic member; 35. connecting frame; 36. card slot. DETAILED DESCRIPTION

[0037] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0038] like Figures 1 to 12 The high-voltage switchgear shown in the figure is convenient for monitoring the contacts of the circuit breaker, and includes a switchgear cabinet body 1. A water tank 20 for humidifying the surrounding air is arranged at the bottom of the switchgear cabinet body 1. An installation groove 21 is opened inside the switchgear cabinet body 1. Two switch mounting frames 10 for mounting electrical components are fixedly connected in the installation groove 21. A door panel 2 is hinged on one side of the installation groove 21. A plurality of air outlet nozzles 16 for dissipating heat to the switch mounting frames 10 are arranged on the side of the installation groove 21 away from the door panel 2. A monitoring component is also arranged inside the switchgear cabinet body 1.

[0039] In the specific implementation, in the prior art, the components in the switch cabinet mainly include circuit breakers, disconnectors, load switches, operating mechanisms, transformers and various protection devices, and the above-mentioned electrical components refer to circuit breakers, disconnectors, load switches and transformers.

[0040] As a further implementation scheme of the present invention, a first mounting frame 23 and a second mounting frame 24 are arranged below the switch mounting frame 10, the first mounting frame 23 is located above the second mounting frame 24, both the first mounting frame 23 and the second mounting frame 24 are equipped with built-in wires, the first mounting frame 23 and the second mounting frame 24 are fixedly connected to the wall panel of the switch cabinet body 1 on the side away from the door panel 2 through a support rod on the side away from the door panel 2, a fixed contact 26 is fixedly connected at the center of the first mounting frame 23, the fixed contact 26 is electrically connected to the built-in wire of the first mounting frame 23, the built-in wire of the first mounting frame 23 is electrically connected to the external alternating current, the built-in wire of the second mounting frame 24 is electrically connected to the electrical components on the switch mounting frame 10, a conductive column 25 is slidably connected at the center of the second mounting frame 24, the conductive column 25 is electrically connected to the built-in wire of the second mounting frame 24, the conductive column 25 is movably abutted against the fixed contact 26, and the monitoring component is used to disconnect the electrical connection between the conductive column 25 and the fixed contact 26.

[0041] In a specific implementation, a switch cabinet is an electrical device, which is externally connected to alternating current. This is common knowledge in the art and will not be disclosed in detail here.

[0042] As a further implementation scheme of the present invention, a ring plate 27 is fixedly sleeved on the top outer wall of the conductive column 25, a reset spring 28 is fixedly connected to the bottom of the ring plate 27, one end of the reset spring 28 away from the ring plate 27 is fixedly connected to the top wall plate of the second mounting frame 24, one side of the second mounting frame 24 is fixedly connected to a connecting frame 35 with an inverted "L"-shaped cross-section, the horizontal end of the connecting frame 35 is fixedly connected to the side wall of the second mounting frame 24, the vertical end of the connecting frame 35 is fixedly connected to an elastic member 34, the end of the elastic member 34 away from the connecting frame 35 is fixedly connected to a clamping rod 33, the clamping rod 33 passes through the side wall of the second mounting frame 24, and a clamping slot 36 is opened on the side wall of the conductive column 25, and the clamping rod 33 is movably clamped with the clamping slot 36.

[0043] In a specific implementation, a hemispherical flange is provided at the end of the clamping rod 33. When the flange abuts against the conductive column 25, the friction force is small, so it will not hinder the conductive column 25 from sliding. The elastic member 34 can be a micro spring.

[0044] As a further implementation scheme of the present invention, the monitoring component includes a heat conducting plate 29 fixedly connected to the bottom of the two switch mounting frames 10, a partition is arranged between the water tank 20 and the mounting groove 21, an iron rod 9 is fixedly sleeved at the center of the partition, the bottom end of the iron rod 9 passes through the partition and extends to the bottom of the water tank 20, a coil 31 is wound around the outside of the iron rod 9, a thermistor 30 is fixedly connected to one end of the heat conducting plate 29, the two thermistors 30 are connected in series, and then connected in series with the coil 31, and the two thermistors 30 are electrically connected to an external independent power supply after being connected in series with the coil 31.

[0045] In the specific implementation, the thermistor 30 is of inverse type, and its resistance value decreases as the heat increases. The arrangement of the coil 31 and the iron rod 9 applies the principle of electromagnet, which will not be disclosed in detail here.

[0046] like Figure 6 and Fig.10 As shown, an iron ring is provided at the bottom of the conductive column 25, an insulating ring is provided between the iron ring and the conductive column 25, a T-bar is slidably connected at the center of the iron ring, and the T-bar is movably abutted against the bottom wall plate of the conductive column 25. In the process of the conductive column 25 sliding down, the two ends of the T-bar are respectively abutted against the iron rod 9 and the conductive column 25, so that the static electricity on the conductive column 25 can be guided to the iron rod 9, and in the process of the conductive column 25 abutting against the fixed contact 26, the T-bar will be separated from the conductive column 25 under the action of gravity, and the iron rod 9 will generate magnetic force under the action of the coil 31, and the magnetic force will control the descent of the conductive column 25 by attracting the iron ring.

[0047] As a further implementation scheme of the present invention, a humidity sensor 11 is fixedly connected to one side of the door panel 2 close to the switch mounting frame 10 located at the bottom of the mounting groove 21. The humidity sensor 11 is used to monitor the humidity of the air inside the mounting groove 21. A door frame is opened on one side wall panel of the mounting groove 21. The door panel 2 is hinged in the door frame. A rectangular air bag 22 is embedded in the wall panel of the door frame. The air bag 22 abuts against the side wall of the door panel 2. The bottom of the air bag 22 is connected to a vertical pipe. The end of the vertical pipe away from the air bag 22 is connected to a gas filling port 5. The gas filling port 5 is located on the outside of the switch cabinet body 1.

[0048] In a specific implementation, a solenoid valve is provided inside the gas filling port 5. After the door is closed, air is blown into the airbag 22 through the gas filling port 5. Before the door is opened, the solenoid valve is opened to discharge the excess gas inside the airbag 22. The gas filling of the airbag 22 is achieved by an external gas filling device, which can be a gas cylinder. This technology is a prior art and will not be disclosed in detail here.

[0049] As a further implementation scheme of the present invention, an air pump 12 is fixedly connected to the outer wall of the end of the switch cabinet body 1 away from the door panel 2, and the output end of the air pump 12 is connected to an output pipe 13, and the end of the output pipe 13 away from the air pump 12 is connected to an internal pipe 14, and the internal pipe 14 is opened in the wall panel of the switch cabinet body 1 away from the door panel 2. Two transverse grooves 15 are opened inside the wall panel of the end of the switch cabinet body 1 away from the door panel 2, and the two transverse grooves 15 are respectively located above the two switch mounting frames 10, and the two ends of the internal pipe 14 are respectively connected to the two transverse grooves 15, and the connecting point between the output pipe 13 and the internal pipe 14 is located in the middle section of the internal pipe 14, and the side of the transverse groove 15 close to the door panel 2 is connected to multiple air outlet nozzles 16, and the multiple air outlet nozzles 16 connected by the two transverse grooves 15 are respectively facing above the two switch mounting frames 10.

[0050] In a specific implementation, the air outlet nozzles 16 are used to dissipate heat for multiple electrical components installed on the switch mounting frame 10. It should be noted that each transverse groove 15 is connected to multiple air outlet nozzles 16, and the air outlet nozzles 16 connected to each transverse groove 15 are called a group, and the two groups of air outlet nozzles 16 are respectively facing the top of the two switch mounting frames 10.

[0051] As a further implementation scheme of the present invention, an air outlet is opened on the side wall panel of the partition close to the door panel 2, the air outlet is connected to the mounting groove 21 and an air pressure valve 18 is provided at the connection point between the two, the end of the air outlet away from the mounting groove 21 is connected to an electromagnetic three-way valve 17, the electromagnetic three-way valve 17 is a one-inlet and two-outlet three-way valve, and its two output ends are respectively connected to an air outlet pipe 19 and a built-in conduit 32, the air outlet pipe 19 extends to the bottom of the water tank 20, and a rectangular opening 7 is opened on the side of the top of the water tank 20 away from the door panel 2, the rectangular opening 7 is used to discharge the gas entering the water tank 20, and a cotton board 6 is fixedly connected to the top wall panel of the rectangular opening 7, and the input end of the air pump 12 is located above the cotton board 6.

[0052] In a specific implementation, a waterproof barrier is provided on the top of the cotton board 6, and the waterproof barrier is used to prevent the input end of the air pump 12 from directly extracting water vapor from the cotton board 6. The air pressure valve 18 is provided with an air pressure preset value, and when the air pressure in the installation groove 21 is higher than the air pressure preset value, the air pressure valve 18 is opened, otherwise the air pressure valve 18 is closed.

[0053] As a further implementation scheme of the present invention, a built-in conduit 32 is opened inside the partition, and one end of the built-in conduit 32 away from the electromagnetic three-way valve 17 is connected to a guide tube 8, and one end of the guide tube 8 away from the built-in conduit 32 is toward the side of the cotton board 6, and the electromagnetic three-way valve 17 is communicated with the humidity sensor 11.

[0054] In a specific implementation, the humidity sensor 11 is equipped with a built-in controller, and the humidity sensor 11 is provided with a minimum humidity preset value and a maximum humidity preset value. When the humidity sensor 11 detects that the humidity inside the installation slot 21 is higher than the maximum humidity preset value, the humidity sensor 11 feeds back a first request message to the built-in controller thereof. After receiving the first request message, the controller generates a first control message, and sends the first control message to the electromagnetic three-way valve 17, thereby enabling the electromagnetic three-way valve 17 to connect the built-in conduit 32 with the air outlet. When the humidity sensor 11 detects that the humidity inside the installation slot 21 is lower than the minimum humidity preset value, the humidity sensor 11 feeds back a second request message to the built-in controller thereof. After receiving the second request message, the controller generates a second control message, and sends the second control message to the electromagnetic three-way valve 17, thereby enabling the electromagnetic three-way valve 17 to connect the air outlet pipe 19 with the air outlet.

[0055] As a further implementation scheme of the present invention, one end of the door panel 2 is fixedly connected to two hinges, and the two hinges are respectively fixedly connected to the wall panel of the door frame away from the installation groove 21. A clamping plate 4 is movably connected to the center of the end of the door panel 2 away from the hinge, and a rectangular ring 3 is fixedly connected to the center of the end of the door frame away from the hinge. The inside of the rectangular ring 3 is slidably connected to the clamping plate 4, and the clamping plate 4 is movably clamped to the wall panel of the door panel 2 away from the hinge.

[0056] In a specific implementation, a chamfer is provided at one end of the clamping plate 4 close to the door panel 2 , so as to make it easier for the clamping plate 4 to be clamped with the door panel 2 . Before opening the door panel 2 , the clamping plate 4 can be pulled away from the rectangular ring 3 .

[0057] As a further embodiment of the present invention, a monitoring method for a high-voltage switch cabinet for monitoring circuit breaker contacts is provided, the monitoring method comprising the following steps:

[0058] Step 1: After the electrical components are mounted on the two switch mounting frames 10, the door panel 2 is closed, and after the door panel 2 is closed, the clamping plate 4 is clamped with the door panel 2, and then the airbag 22 is inflated through the air filling port 5, so that the airbag 22 seals the door panel 2 and the door frame;

[0059] Step 2: During the operation of the switch cabinet, the electrical components on the switch mounting frame 10 will generate heat, and the heat is conducted to the thermistor 30 through the heat conducting plate 29. The resistance of the thermistor 30 decreases due to the heat, thereby increasing the current in the coil 31, thereby enhancing the magnetism of the iron rod 9, and then separating the fixed contact 26 from the conductive column 25, protecting the electrical components from overheating, and monitoring the electrical components from overheating through the thermistor 30;

[0060] Step 3: The air pump 12 is used to dissipate heat from the electrical components on the switch mounting frame 10 , the water tank 20 is used to humidify the surrounding air, and the humidity inside the switch cabinet body 1 is detected by the humidity sensor 11 .

[0061] In a specific implementation, the heat of the electrical component is monitored in real time through the thermistor 30. When the thermistor 30 is heated, its resistance decreases. After the resistance of the thermistor 30 decreases, the current in the coil 31 increases. After the current in the coil 31 increases, the iron rod 9 will generate magnetism. After the iron rod 9 generates magnetism, it will attract the conductive column 25 downward, thereby separating the conductive column 25 from the fixed contact 26, so that the electrical component can be powered off, thereby achieving the purpose of overheating protection for the electrical component and avoiding fire caused by overheating of the electrical component.

[0062] Working principle of the present invention:

[0063] When the present invention is used, first, the corresponding switches and other electrical components are installed through two switch mounting frames 10. After the electrical components are installed on the two switch mounting frames 10, the conductive column 25 is controlled to abut against the fixed contact 26 to supply power to the electrical components on the two switch mounting frames 10, so that the electrical components can work normally. Then the door panel 2 is closed, and after the door panel 2 is closed, the clamping plate 4 is clamped with the door panel 2, and then an external gas filling device is used to connect the gas filling port 5, and then the airbag 22 is inflated. After the gas enters the airbag 22, the airbag 22 will expand, so that the airbag 22 effectively seals the door panel 2 and the door frame, which is conducive to maintaining the sealing performance inside the switch cabinet body 1.

[0064] After the door panel 2 is closed and sealed by the airbag 22, the electrical components installed on the switch mounting frame 10 start working. The electrical components will generate heat during the operation. When too much heat is generated, the electrical components will be damaged due to overheating. By turning on the air pump 12, the air pump 12 will supply gas to the output pipe 13. After the gas enters the output pipe 13, it will flow to the two horizontal grooves 15 through the built-in pipe 14. Then the gas will be sprayed on the top of the switch mounting frame 10 through multiple air outlet nozzles 16. The flow of air flow is used to dissipate the heat of the electrical components installed on the switch mounting frame 10, which is beneficial to avoid damage to the electrical components on the switch mounting frame 10 due to overheating.

[0065] After the gas enters the installation groove 21, the air pressure in the installation groove 21 will also increase. Through the setting of the air pressure valve 18, the air pressure in the installation groove 21 is higher than the external atmospheric pressure, and the air pressure in the installation groove 21 is higher than the external atmospheric pressure. Therefore, in the subsequent maintenance process, it is more conducive to the rapid opening of the door panel 2, and it is conducive to avoiding the situation where the internal air pressure of the installation groove 21 is lower than the external atmospheric pressure, and then the external atmospheric pressure presses the door panel 2 on the door frame and cannot be opened. Through the blowing work of the air pump 12, on the one hand, it can be conducive to the heat dissipation of the electrical components on the switch mounting frame 10, and on the other hand, it can also be conducive to the rapid opening of the door panel 2, so as to facilitate the effective maintenance of the electrical components installed on the switch mounting frame 10 in the installation groove 21.

[0066] When the air pressure in the installation groove 21 is higher than the preset pressure value of the air pressure valve 18, the air pressure valve 18 opens, and then discharges the gas in the installation groove 21, so that the gas can flow in the installation groove 21, thereby achieving the purpose of heat dissipation for the electrical components on the switch mounting frame 10. After the air pressure valve 18 is opened, the gas in the installation groove 21 will enter the outlet pipe 19 through the electromagnetic three-way valve 17, and then enter the bottom of the water tank 20. Through the contact between the gas and the water in the water tank 20, the gas contains a certain amount of moisture, and the gas is effectively humidified. Then the humidified gas will be discharged through the rectangular opening 7. After the gas is discharged through the rectangular opening 7, it can effectively humidify the air around the switch cabinet body 1, and reduce the probability of static electricity generated by the electrical components inside the installation groove 21 by humidification. It should be noted that static electricity is more likely to be generated in a dry environment, while in an environment with a certain humidity, static electricity is not easy to generate, and the generated static electricity can also combine with ions in the air to achieve the purpose of eliminating static electricity. This is common knowledge in the art and will not be disclosed in detail here.

[0067] In the process of gas being discharged through the rectangular opening 7, the cotton board 6 can absorb part of the water vapor, which is beneficial to avoid the occurrence of excessive humidity in the air. Secondly, the cotton board 6 can also play a certain shielding role between the rectangular opening 7 and the input end of the air pump 12, which is beneficial to avoid the air pump 12 directly drawing the humid air discharged from the rectangular opening 7 into the installation groove 21. Through the shielding of the cotton board 6, the humid air can diffuse to a certain extent in the surrounding air, reducing the water vapor content per unit volume, and then the air is drawn into the interior of the installation groove 21 through the air pump 12, which is beneficial to avoid excessive humidity in the installation groove 21.

[0068] By setting the water tank 20, the water tank 20 can provide humid air around the switch cabinet body 1 on the one hand, and on the other hand, the water tank 20 can also increase the weight of the bottom of the switch cabinet body 1. By increasing the weight, the stability of the switch cabinet body 1 is improved, which helps to avoid the switch cabinet body 1 from tipping over during use.

[0069] The humidity in the installation slot 21 is effectively monitored by the humidity sensor 11. When the humidity in the installation slot 21 is too high, the controller built into the humidity sensor 11 controls the electromagnetic three-way valve 17 to connect the internal space of the installation slot 21 with the built-in conduit 32, so that the gas inside the installation slot 21 can be discharged into the guide pipe 8 through the built-in conduit 32, and then blown onto the cotton board 6. The gas will blow the water vapor adhering to the cotton board 6 to the side away from the guide pipe 8, so that the input end of the air pump 12 can extract air with relatively low humidity into the installation slot 21, which is conducive to avoiding the situation where the humidity inside the switch cabinet body 1 is too high, and it is also conducive to avoiding the situation where the input end of the air pump 12 continuously extracts gas with too high humidity. When the humidity sensor 11 detects that the humidity inside the installation slot 21 is too low, the controller built into the humidity sensor 11 controls the electromagnetic three-way valve 17 to connect the internal space of the installation slot 21 with the outlet pipe 19, so as to humidify the surrounding air.

[0070] As the use time goes by, the electrical components in the installation slot 21 will continue to generate heat, and the heat will be conducted to the thermistor 30 through the heat conducting plate 29. After the heat of the thermistor 30 increases, the resistance value of the thermistor 30 will decrease, thereby reducing the overall resistance value between the two thermistors 30 and the coil 31. After the overall resistance value of the circuit is reduced, the current will increase because its voltage remains unchanged. After the current increases, the current of the coil 31 will increase. After the current of the coil 31 increases, the iron rod 9 inside the coil 31 will generate magnetism, and the magnetism will become higher and higher as the resistance value increases. As the magnetic force increases, the iron rod 9 will attract the conductive column 25 downward. After the conductive column 25 moves downward, it will compress the reset spring 28. After the conductive column 25 drops, it will separate from the fixed contact 26, thereby cutting off the power to the electrical component. On the one hand, the electrical component is protected from power failure to avoid damage to the electrical component. On the other hand, it can also help to avoid fire caused by overheating of the electrical component. The thermistor 30 can be used to monitor the electrical component in real time during its operation. The monitoring of the thermistor 30 avoids the disadvantage of expensive traditional monitoring equipment, which can effectively save costs.

[0071] As the conductive column 25 descends, the clamping rod 33 located on the side of the second mounting frame 24 will be inserted into the clamping slot 36 on the conductive column 25, thereby separating the conductive column 25 from the fixed contact 26. After the conductive column 25 is separated from the fixed contact 26, it is beneficial to overheat protection of the electrical components on the switch mounting frame 10. After the clamping rod 33 is clamped with the clamping slot 36, the bottom end of the conductive column 25 will contact the iron rod 9, and the static electricity on the electrical components on the switch mounting frame 10 will be guided to the water tank 20 through the iron rod 9, and then connected to the ground through the water tank 20, which is beneficial to eliminate static electricity. In addition, through the setting of the air outlet pipe 19, the air outlet pipe 19 will increase the oxygen content of the water in the water tank 20, thereby increasing the ion content in the water tank 20. The increase in the ion content in the water can also help neutralize the static electricity charge and further reduce the static electricity in the electrical components.

[0072] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A high-voltage switchgear for monitoring circuit breaker contacts, comprising a switchgear cabinet (1), characterized in that: The bottom of the switch cabinet body (1) is provided with a water tank (20) for humidifying the surrounding air, the switch cabinet body (1) is provided with a mounting groove (21) inside, two switch mounting frames (10) for mounting electrical components are fixedly connected in the mounting groove (21), a door panel (2) is hingedly connected to one side of the mounting groove (21), a plurality of air outlet nozzles (16) for dissipating heat from the switch mounting frames (10) are provided on the side of the mounting groove (21) away from the door panel (2), and a monitoring component is also provided inside the switch cabinet body (1).

2. The high-voltage switch cabinet for conveniently monitoring circuit breaker contacts according to claim 1 is characterized in that: A first mounting frame (23) and a second mounting frame (24) are arranged below the switch mounting frame (10); the first mounting frame (23) is located above the second mounting frame (24); both the first mounting frame (23) and the second mounting frame (24) have built-in wires; the first mounting frame (23) and the second mounting frame (24) are both fixedly connected to a wall panel of a switch cabinet body (1) on a side away from the door panel (2) via a support rod; a fixed contact (26) is fixedly connected to the center of the first mounting frame (23); the fixed contact (26) and the first mounting frame are connected to each other. (23) is electrically connected to the built-in wire of the first mounting frame (23), the built-in wire of the first mounting frame (23) is electrically connected to the external alternating current, the built-in wire of the second mounting frame (24) is electrically connected to the electrical components on the switch mounting frame (10), a conductive column (25) is slidably connected to the center of the second mounting frame (24), the conductive column (25) is electrically connected to the built-in wire of the second mounting frame (24), the conductive column (25) is movably abutted against the fixed contact (26), and the monitoring component is used to disconnect the electrical connection between the conductive column (25) and the fixed contact (26).

3. The high-voltage switch cabinet for conveniently monitoring circuit breaker contacts according to claim 2 is characterized in that: A ring plate (27) is fixedly sleeved on the top outer wall of the conductive column (25), a reset spring (28) is fixedly connected to the bottom of the ring plate (27), one end of the reset spring (28) away from the ring plate (27) is fixedly connected to the top wall plate of the second mounting frame (24), one side of the second mounting frame (24) is fixedly connected to a connecting frame (35) with an inverted "L"-shaped cross section, the horizontal end of the connecting frame (35) is fixedly connected to the side wall of the second mounting frame (24), the vertical end of the connecting frame (35) is fixedly connected to an elastic member (34), the end of the elastic member (34) away from the connecting frame (35) is fixedly connected to a clamping rod (33), the clamping rod (33) passes through the side wall of the second mounting frame (24), and a clamping groove (36) is provided on the side wall of the conductive column (25), and the clamping rod (33) is movably clamped with the clamping groove (36).

4. The high-voltage switch cabinet for conveniently monitoring circuit breaker contacts according to claim 3 is characterized in that: The monitoring component comprises a heat conducting plate (29) fixedly connected to the bottom of two switch mounting frames (10), a partition is arranged between the water tank (20) and the mounting tank (21), an iron rod (9) is fixedly sleeved at the center of the partition, the bottom end of the iron rod (9) passes through the partition and extends to the bottom of the water tank (20), a coil (31) is wound around the outer side of the iron rod (9), one end of the heat conducting plate (29) is fixedly connected to a thermistor (30), the two thermistors (30) are connected in series, and then connected in series with the coil (31), and the two thermistors (30) are electrically connected to an external independent power supply after being connected in series with the coil (31).

5. The high-voltage switch cabinet for conveniently monitoring circuit breaker contacts according to claim 4 is characterized in that: A humidity sensor (11) is fixedly connected to one side of the door panel (2) close to the switch mounting frame (10) located at the bottom of the mounting groove (21). The humidity sensor (11) is used to monitor the humidity of the air inside the mounting groove (21). A door frame is provided on a side wall panel of the mounting groove (21). The door panel (2) is hinged in the door frame. A rectangular air bag (22) is embedded in the wall panel of the door frame. The air bag (22) is in contact with the side wall of the door panel (2). The bottom of the air bag (22) is connected to a vertical pipe. The end of the vertical pipe away from the air bag (22) is connected to a gas filling port (5). The gas filling port (5) is located on the outside of the switch cabinet body (1).

6. The high-voltage switch cabinet for conveniently monitoring circuit breaker contacts according to claim 5, characterized in that: An air pump (12) is fixedly connected to the outer wall of the switch cabinet body (1) at one end away from the door panel (2); the output end of the air pump (12) is connected to an output pipe (13); the end of the output pipe (13) away from the air pump (12) is connected to an internal pipe (14); the internal pipe (14) is arranged in the wall panel at one end of the switch cabinet body (1) away from the door panel (2); two transverse grooves (15) are arranged inside the wall panel at one end of the switch cabinet body (1) away from the door panel (2); the two transverse grooves (15) are arranged inside the wall panel at one end of the switch cabinet body (1) away from the door panel (2); The transverse grooves (15) are respectively located above the two switch mounting frames (10); the two ends of the built-in pipe (14) are respectively connected to the two transverse grooves (15); the connection point between the output pipe (13) and the built-in pipe (14) is located at the middle section of the built-in pipe (14); a side of the transverse groove (15) close to the door panel (2) is connected to a plurality of air outlet nozzles (16); and the plurality of air outlet nozzles (16) connected by the two transverse grooves (15) are respectively directed toward the tops of the two switch mounting frames (10).

7. The high-voltage switch cabinet for conveniently monitoring circuit breaker contacts according to claim 6 is characterized in that: An air outlet is provided on a side wall plate of the partition plate close to the door plate (2), the air outlet is connected to the mounting groove (21), and a pressure valve (18) is provided at the connection point between the two. An end of the air outlet away from the mounting groove (21) is connected to an electromagnetic three-way valve (17), the electromagnetic three-way valve (17) is a one-inlet and two-outlet three-way valve, and its two output ends are respectively connected to an air outlet pipe (19) and a built-in conduit (32), the air outlet pipe (19) extends to the bottom of the water tank (20), and a rectangular opening (7) is provided on the top of the water tank (20) away from the door plate (2), the rectangular opening (7) is used to discharge the gas entering the water tank (20), a cotton board (6) is fixedly connected to the top wall plate of the rectangular opening (7), and the input end of the air pump (12) is located above the cotton board (6).

8. The high-voltage switch cabinet for conveniently monitoring circuit breaker contacts according to claim 7, characterized in that: The built-in conduit (32) is opened inside the partition, and one end of the built-in conduit (32) away from the electromagnetic three-way valve (17) is connected to the guide tube (8), and one end of the guide tube (8) away from the built-in conduit (32) is toward the side of the cotton board (6), and the electromagnetic three-way valve (17) is connected to the humidity sensor (11) for communication.

9. The high-voltage switch cabinet for conveniently monitoring circuit breaker contacts according to claim 8, characterized in that: One end of the door panel (2) is fixedly connected to two hinges, and the two hinges are respectively fixedly connected to the wall panel of the door frame away from the installation groove (21). A clamping plate (4) is movably connected at the center of the end of the door panel (2) away from the hinge. A rectangular ring (3) is fixedly connected at the center of the end of the door frame away from the hinge. The inside of the rectangular ring (3) is slidably connected to the clamping plate (4), and the clamping plate (4) is movably connected to the wall panel of the end of the door panel (2) away from the hinge.

10. The method for monitoring a high-voltage switch cabinet for monitoring circuit breaker contacts according to claim 9, characterized in that: The monitoring method comprises the following steps: Step 1: After the electrical components are mounted on the two switch mounting frames (10), the door panel (2) is closed, and after the door panel (2) is closed, the clamping plate (4) is clamped to the door panel (2), and then the airbag (22) is inflated through the air filling port (5) so that the airbag (22) seals the door panel (2) and the door frame; Step 2: During the operation of the switch cabinet, the electrical components on the switch mounting frame (10) will generate heat, and the heat is transferred to the thermistor (30) through the heat conducting plate (29). The resistance value of the thermistor (30) decreases due to the heat, thereby increasing the current in the coil (31), thereby enhancing the magnetism of the iron rod (9), and separating the fixed contact (26) from the conductive column (25), thereby protecting the electrical components from overheating, and monitoring the electrical components through the thermistor (30); Step 3: The electrical components on the switch mounting frame (10) are cooled by the air pump (12), the surrounding air is humidified by the water tank (20), and the humidity inside the switch cabinet body (1) is detected by the humidity sensor (11).

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