Sulfur hexafluoride insulation high-voltage looped network power distribution cabinet and use method thereof

Abstract

The invention belongs to the technical field of power distribution cabinets, and discloses a sulfur hexafluoride insulation high-voltage looped network power distribution cabinet and a use method thereof.The sulfur hexafluoride insulation high-voltage looped network power distribution cabinet comprises a cabinet body, a first frame and a second frame are fixedly arranged on the two sides of the cabinet body respectively, and a vacuum pump is fixedly arranged in the first frame. Through opening and closing control of the main suction pipe fitting, sulfur hexafluoride gas in the cabinet body is sucked out from the cabinet body by utilizing a vacuum suction effect and is guided and circulated into the suction treatment assembly, and adsorption treatment of circulating sulfur hexafluoride mixed gas is realized by utilizing an adsorption part in the suction treatment assembly and matching with filled adsorbates, so that the sulfur hexafluoride gas is effectively adsorbed and treated, and the sulfur hexafluoride gas treatment efficiency is improved. The sulfur hexafluoride gas is decomposed into sulfur hexafluoride gas, harmful gas generated by decomposition is adsorbed and filtered out and temporarily stored in the pre-storage assembly after adsorption, and the sulfur hexafluoride gas obtained after filtration and adsorption is automatically backfilled into the cabinet body by opening the pre-storage assembly after adsorption is completed, so that efficient and simple adsorption treatment and separation of the harmful gas in the cabinet body are achieved; the cleanliness of the sulfur hexafluoride gas in the cabinet body is improved, and corrosion and other conditions are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of power distribution cabinets, and specifically relates to a sulfur hexafluoride insulated high-voltage ring network power distribution cabinet and a use method thereof. Background Art

[0002] Sulfur hexafluoride insulated high-voltage ring network distribution cabinet, referred to as sulfur hexafluoride ring network cabinet or SF6 ring network cabinet, is a high-voltage switchgear, mainly used for the control and protection of power distribution systems.

[0003] The sulfur hexafluoride insulated high-voltage ring network distribution cabinet in the prior art is controlled and protected by internally filling sulfur hexafluoride insulation during use, and maintains long service life under sealing treatment. However, after long-term use, the internal sulfur hexafluoride insulating gas decomposes due to high-temperature arcs, partial discharges or equipment failures, and produces toxic and corrosive gases such as SF4, S2F2, S2F10, SOF2, HF, SO2, etc. These gases may cause corrosion to the equipment in the cabinet. Under this influence, it is currently difficult to achieve effective separation and treatment, the shutdown and ventilation operation is difficult, the risk of intermediate gas leakage is high, and it is difficult to achieve separation and treatment of internal polluted gases. At the same time, it is difficult to achieve rapid and effective treatment for gas replenishment and ventilation operations, and the use effect is not good. Summary of the invention

[0004] The object of the present invention is to provide a sulfur hexafluoride insulated high-voltage ring network distribution cabinet and a method of using the same, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical scheme: a sulfur hexafluoride insulated high-voltage ring network distribution cabinet and a method of using the same, comprising a cabinet body, a frame No. 1 and a frame No. 2 are fixedly provided on both sides of the cabinet body, a vacuum pump is fixedly provided inside the frame No. 1, an air supply pump is fixedly provided inside the frame No. 2, a main suction pipe is fixedly provided on the top of the frame No. 1, an air suction processing component is provided inside the frame No. 1, the vacuum pump is connected to the interior of the cabinet body through the air suction processing component and the main suction pipe fitting, a pre-storage component is fixedly provided inside the frame No. 1, an air outlet end of the vacuum pump is connected to the pre-storage component, one air outlet direction of the pre-storage component is the interior of the cabinet body, an air cooling part is fixedly provided on the back of the cabinet body, a circulation component is fixedly provided on the back of the cabinet body, both ends of the circulation component are connected to the interior of the cabinet body, and the circulation component is located on the front of the air cooling part.

[0006] Preferably, a control valve 1 is provided at the air outlet end of the air supply pump, a hose is provided at the air inlet end of the air supply pump, the hose is connected to an external sulfur hexafluoride gas storage tank, and the air outlet end of the air supply pump is connected to the interior of the cabinet.

[0007] Preferably, a through hole is opened on the top of the No. 1 frame, the main suction pipe also includes a control valve 2, the control valve 2 is connected to the through hole, an operation port is opened on the top of the No. 1 frame, and an adapter port is opened on the side of the No. 1 frame, and the adapter port is connected to the operation port.

[0008] Preferably, the air intake processing component includes a fixed frame, a movable frame, a partition, an adsorption portion, an assembly port, a baffle and a middle port, the fixed frame is fixedly connected to the inside of frame No. 1, and one end is fixedly sleeved in the adapter port, the movable frame is located in the fixed frame, the number of the partitions is two, and the two partitions are fixedly connected to the inside of the movable frame, the assembly port is opened at the top of the movable frame and passes through the bottom surface of the movable frame, the baffle is fixedly connected in the assembly port and close to the inner wall of the bottom surface of the movable frame, the adsorption portion is sleeved in the assembly port and placed on the top of the baffle, the partitions are symmetrically distributed on both sides of the assembly port, and the middle port is opened at the top of the fixed frame.

[0009] Preferably, the middle opening is located below the operating opening and is connected to the operating opening, the middle opening is located on the moving path of the assembly opening, a pull rod is fixedly connected to the outer side surface of the partition, a damping sleeve is fixedly provided on the outer surface of the movable frame, and the movable frame is slidably connected to the fixed frame through the damping sleeve.

[0010] Preferably, the top of the fixing frame is connected to the through hole through the first connecting hole, and the bottom of the fixing frame is connected to the suction end of the vacuum pump through the second connecting hole.

[0011] Preferably, the pre-stored component includes a support frame, an elastic airbag, a No. 1 tube, a No. 2 tube, a No. 1 valve and a No. 2 valve, the support frame is fixed on the right side surface of the cabinet, the two side surfaces of the elastic airbag are fixed inside the support frame, one end of the No. 1 tube passes through the support frame and the elastic airbag and is connected to the elastic airbag, and the No. 1 tube is fixedly sleeved inside the cabinet, the other end of the No. 1 tube is fixedly installed with the No. 1 valve and is located inside the cabinet, one end of the No. 2 tube passes through the support frame and the elastic airbag and is connected to the elastic airbag, and the other end is fixedly installed with the No. 2 valve, and the air outlet end of the vacuum pump is connected to the elastic airbag.

[0012] Preferably, the circulation component includes a curved pipe, an intermediate frame and an exhaust fan, both ends of the curved pipe are fixed to the back of the cabinet and connected to the interior of the cabinet, the intermediate frame is fixedly installed in the middle of the curved pipe and connected to the curved pipe, the exhaust fan is fixedly arranged inside the intermediate frame, and the air cooling part includes a blower.

[0013] A method for using a sulfur hexafluoride insulated high-voltage ring network distribution cabinet comprises the following steps:

[0014] Step 1: When processing the internal gas, start the vacuum pump, keep valve No. 1 and valve No. 2 closed, and open control valve No. 2 in the main suction pipe. The vacuum pump sucks the gas filled in the cabinet out of the cabinet through the main suction pipe;

[0015] Step 2: As the sucked gas flows out from the main suction pipe, it enters the suction processing component along the through hole, and the sucked gas flows into the movable frame, passes through the internal adsorption part and flows downward from the assembly port. The harmful gas in the mixed gas flow is adsorbed in the adsorption part, and the filtered and adsorbed sulfur hexafluoride gas is sucked into the vacuum pump and input into the pre-storage component through the gas outlet pipeline;

[0016] Step 3: As sulfur hexafluoride gas is continuously input into the elastic airbag of the pre-stored component, the elastic airbag is inflated and expanded. After the gas inside the cabinet is completely sucked out, the main suction pipe is kept sealed and closed, and the No. 1 valve corresponding to the No. 1 pipe is opened. The sulfur hexafluoride gas in the elastic airbag is quickly squeezed and sucked into the cabinet, and the cleaned sulfur hexafluoride gas is refilled;

[0017] Step 4: Close valve No. 1, turn on the air supply pump, connect the air supply pump to the storage tank of sulfur hexafluoride gas, and further replenish the sulfur hexafluoride gas into the cabinet to complete the replenishment.

[0018] Step 5: During high-load operation, the exhaust fan in the circulation component is started. The exhaust fan rotates in the middle frame and sucks gas toward the curved pipe on one side, so that the sulfur hexafluoride gas in the cabinet flows. The sulfur hexafluoride gas in the cabinet is first sucked along the curved pipe at one end and flows back to the cabinet through the middle frame. At the same time, the air cooling part is kept started. The fan in the air cooling part performs forced air cooling toward the multiple sets of curved pipes, and the temperature of the sulfur hexafluoride gas circulating in the curved pipes decreases.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The present invention utilizes the cooperation of a vacuum pump and an air suction treatment component, utilizes the opening and closing control of a main suction pipe, and utilizes the vacuum suction effect to suck out the sulfur hexafluoride gas in the cabinet from the cabinet, and guides the flow to the air suction treatment component. The adsorption part in the air suction treatment component is used in conjunction with the filled adsorbent to achieve adsorption treatment of the circulating sulfur hexafluoride mixed gas, absorb and filter out the harmful gas generated by decomposition, and temporarily store it in a pre-storage component after adsorption. After the adsorption is completed, the pre-storage component is opened to automatically fill the filtered and adsorbed sulfur hexafluoride gas back into the cabinet, thereby achieving efficient and simple adsorption treatment and separation of harmful gases in the cabinet, improving the cleanliness of the sulfur hexafluoride gas inside the cabinet, and avoiding corrosion and the like.

[0021] 2. The present invention realizes multiple sets of gas outlet directions of the pre-storage component by utilizing the cooperation of the vacuum pump and the pre-storage component and the No. 1 and No. 2 pipes in the pre-storage component. After the gas inside the cabinet is sucked in and stored, the No. 2 pipe is bypassed to guide and release the gas inside the cabinet after it is extracted. In combination with the air supply pump and the external storage tank, new sulfur hexafluoride gas can be filled, thereby realizing the replacement operation of the gas inside the cabinet. Time replacement and replenishment can be realized, and the control effect of the sulfur hexafluoride gas inside the cabinet is good.

[0022] 3. The present invention utilizes a circulation component added at the back to absorb sulfur hexafluoride gas from one place inside the cabinet and guide it into the circulation component, and replenishes it from another place inside the cabinet to realize the circulation of sulfur hexafluoride gas inside the cabinet. At the same time, multiple groups of thin-walled curved pipes and air-cooling parts installed toward the curved pipes are used to air-cool the curved pipes, thereby realizing forced air cooling. For high-load and high-temperature conditions, the heat dissipation effect is greatly improved, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a back schematic diagram of the present invention;

[0025] Figure 3 It is a cross-sectional schematic diagram of the present invention;

[0026] Figure 4 is a schematic diagram of a No. 1 frame of the present invention;

[0027] Figure 5 It is a cross-sectional schematic diagram of the pre-stored component of the present invention;

[0028] Figure 6 is a cross-sectional schematic diagram of an air intake processing assembly of the present invention;

[0029] Figure 7 It is a cross-sectional schematic diagram of the movable frame of the present invention;

[0030] Figure 8 It is a cross-sectional schematic diagram of the first frame of the present invention;

[0031] Fig. 9 It is a cross-sectional schematic diagram of the circulation component of the present invention.

[0032] In the figure: 1. cabinet; 2. rack No. 1; 3. rack No. 2; 4. vacuum pump; 5. air supply pump; 6. suction processing component; 61. fixed frame; 62. movable frame; 63. partition; 64. adsorption part; 65. assembly port; 66. baffle; 67. middle port; 7. main suction pipe fitting; 8. pre-storage component; 81. support frame; 82. elastic air bag; 83. pipe No. 1; 84. pipe No. 2; 85. valve No. 1; 86. valve No. 2; 9. operation port; 10. through hole; 11. circulation component; 111. curved pipe; 112. middle frame; 113. exhaust fan; 12. air cooling part. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figures 1 to 9 As shown, an embodiment of the present invention provides a sulfur hexafluoride insulated high-voltage ring network distribution cabinet and a method of using the same, comprising a cabinet 1, a frame 2 and a frame 3 are fixedly provided on both sides of the cabinet 1, a vacuum pump 4 is fixedly provided inside the frame 2, an air supply pump 5 is fixedly provided inside the frame 3, a main suction pipe 7 is fixedly provided on the top of the frame 2, an air suction processing component 6 is provided inside the frame 2, the vacuum pump 4 is connected to the interior of the cabinet 1 through the air suction processing component 6 and the main suction pipe 7, a pre-storage component 8 is fixedly provided inside the frame 2, an air outlet end of the vacuum pump 4 is connected to the pre-storage component 8, one air outlet direction of the pre-storage component 8 is the interior of the cabinet 1, an air cooling part 12 is fixedly provided on the back of the cabinet 1, a circulation component 11 is fixedly provided on the back of the cabinet 1, both ends of the circulation component 11 are connected to the interior of the cabinet 1, and the circulation component 11 is located on the front of the air cooling part 12.

[0035] Embodiment 1: When processing the internal gas, start the vacuum pump 4, keep the No. 1 valve 85 and the No. 2 valve 86 closed, and open the control valve 2 in the main suction pipe 7. The vacuum pump 4 sucks the gas filled in the cabinet 1 out of the cabinet 1 through the main suction pipe 7. As the sucked gas flows out of the main suction pipe 7, it enters the suction processing component 6 along the through hole 10. The sucked gas flows into the movable frame 62 and passes through the internal adsorption part 64 to flow downward from the assembly port 65. The harmful gas in the mixed gas flow is adsorbed in the adsorption part 64, and the sulfur hexafluoride gas after filtering and adsorption is sucked into the vacuum pump 4. And it is input into the pre-storage component 8 through the outlet pipe. As the sulfur hexafluoride gas is continuously input into the elastic airbag 82 of the pre-storage component 8, the elastic airbag 82 is inflated. After the gas inside the cabinet 1 is completely sucked out, the main suction pipe 7 is kept sealed and closed, and the No. 1 valve 85 corresponding to the No. 1 pipe 83 is opened. The sulfur hexafluoride gas in the elastic airbag 82 is quickly squeezed and sucked into the cabinet 1. The cleaned sulfur hexafluoride gas is refilled, the No. 1 valve 85 is closed, and the air supply pump 5 is opened. The air supply pump 5 is externally connected to a storage tank for sulfur hexafluoride gas, and the sulfur hexafluoride gas is further replenished into the cabinet 1 to complete the replenishment.

[0036] Firstly, by utilizing the cooperation of the vacuum pump 4 and the air suction treatment component 6, utilizing the opening and closing control of the main suction pipe 7, and utilizing the vacuum suction effect, the sulfur hexafluoride gas in the cabinet 1 is sucked out of the cabinet 1 and guided to flow into the air suction treatment component 6, and utilizing the adsorption portion 64 in the air suction treatment component 6 in cooperation with the filled adsorbent to realize the adsorption treatment of the sulfur hexafluoride mixed gas flowing through, and the harmful gas generated by the decomposition is adsorbed and filtered out, and temporarily stored in the pre-storage component 8 after adsorption, and after the adsorption is completed, the filtered and adsorbed sulfur hexafluoride gas is automatically filled back into the cabinet 1 by opening the pre-storage component 8, thereby realizing efficient and simple adsorption treatment and separation of harmful gases in the cabinet 1, improving the cleanliness of the sulfur hexafluoride gas inside the cabinet 1, and avoiding corrosion and the like.

[0037] In addition, by utilizing the cooperation of the vacuum pump 4 and the pre-storage component 8, and utilizing the No. 1 pipe 83 and the No. 2 pipe 84 in the pre-storage component 8, multiple sets of gas outlet directions of the pre-storage component 8 are realized. After the internal gas of the cabinet 1 is sucked in and stored, the No. 2 pipe 84 is bypassed to guide and release the internal gas of the cabinet 1 after it is extracted. In conjunction with the air supply pump 5 and the external storage tank, new sulfur hexafluoride gas can be filled, thereby realizing the replacement operation of the gas inside the cabinet 1. Time replacement and replenishment can be achieved, and the control effect of the sulfur hexafluoride gas inside the cabinet 1 is good.

[0038] Embodiment 2: During high-load operation, the exhaust fan 113 in the circulation component 11 is started, and the exhaust fan 113 rotates in the middle frame 112 and sucks gas toward the curved pipe 111 on one side, so that the sulfur hexafluoride gas in the cabinet 1 flows. The sulfur hexafluoride gas in the cabinet 1 is first sucked along the curved pipe 111 at one end, and flows back to the cabinet 1 through the middle frame 112. At the same time, the air cooling part 12 is kept started, and the fan in the air cooling part 12 performs forced air cooling toward the multiple groups of curved pipes 111, so that the temperature of the sulfur hexafluoride gas circulating in the curved pipes 111 is reduced.

[0039] Firstly, by utilizing the circulation component 11 added at the back, sulfur hexafluoride gas is sucked in from one place inside the cabinet 1 and guided into the circulation component 11, and is supplemented and filled from another place inside the cabinet 1, so as to realize the circulation of sulfur hexafluoride gas inside the cabinet 1. At the same time, with the cooperation of multiple groups of thin-walled curved pipes 111 and the air cooling part 12 installed toward the curved pipe 111, the curved pipe 111 is air-cooled, thereby realizing forced air cooling. For high-load and high-temperature conditions, the heat dissipation effect is greatly improved, and the use effect is good.

[0040] Among them, a control valve 1 is provided at the air outlet end of the air supply pump 5, and a hose is provided at the air inlet end of the air supply pump 5. The hose is connected to an external sulfur hexafluoride gas storage tank, and the air outlet end of the air supply pump 5 is connected to the interior of the cabinet 1.

[0041] By utilizing the control valve to control the air supply of the air supply pump 5, leakage is avoided when closed, and the free end of the hose is used to connect to an external storage tank to achieve air replenishment and ventilation after connection.

[0042] Among them, a through hole 10 is opened at the top of the No. 1 frame 2, the main suction pipe 7 also includes a control valve 2, the control valve 2 is connected to the through hole 10, an operation port 9 is opened at the top of the No. 1 frame 2, and an adapter port is opened on the side of the No. 1 frame 2, and the adapter port is connected to the operation port 9.

[0043] By utilizing the through hole 10 to achieve upper and lower communication, the main suction pipe 7 is connected to the air intake processing assembly 6, and the operation port 9 is convenient for operation, so that the replacement process of the internal adsorption part 64 can be achieved.

[0044] The air intake processing assembly 6 includes a fixed frame 61, a movable frame 62, a partition 63, an adsorption portion 64, an assembly port 65, a baffle 66 and a middle port 67. The fixed frame 61 is fixedly connected to the inside of the No. 1 frame 2, and one end is fixedly sleeved in the adapter port. The movable frame 62 is located in the fixed frame 61. There are two partitions 63, and both partitions 63 are fixedly connected to the inside of the movable frame 62. The assembly port 65 is opened at the top of the movable frame 62 and passes through the bottom surface of the movable frame 62. The baffle 66 is fixedly connected in the assembly port 65 and is close to the inner wall of the bottom surface of the movable frame 62. The adsorption portion 64 is sleeved in the assembly port 67. 5, and is placed on the top of the baffle 66, the partitions 63 are symmetrically distributed on both sides of the assembly port 65, the middle port 67 is opened on the top of the fixed frame 61, the middle port 67 is located below the operation port 9 and is connected to the operation port 9, the middle port 67 is located on the moving path of the assembly port 65, a pull rod is fixedly connected to the outer side surface of a partition 63, a damping sleeve is fixedly provided on the outer surface of the movable frame 62, the movable frame 62 is slidably sleeved in the fixed frame 61 through the damping sleeve, the top of the fixed frame 61 is connected to the through hole 10 through the connecting hole 1, and the bottom of the fixed frame 61 is connected to the suction end of the vacuum pump 4 through the connecting hole 2.

[0045] The treatment of the inhaled mixed gas is achieved through the air intake treatment component 6, and the adsorption treatment of harmful gases is achieved by using adsorption materials such as activated carbon in the adsorption part 64. The partitions 63 on both sides cooperate with the movable frame to achieve sealing on both sides. When the movable frame 62 moves horizontally to connect with the middle port 67, the top operating port 9 can be used to quickly replace the process, and the sealing treatment of the air intake treatment component 6 and the main suction pipe 7 is maintained during the replacement process. No special shutdown operation is required, and the replacement process can be quickly replaced. The pull rod can be pulled from the side, and the damping sleeve effect is cooperated to maintain the stable position after pulling.

[0046] Among them, the pre-stored component 8 includes a support frame 81, an elastic air bag 82, a No. 1 tube 83, a No. 2 tube 84, a No. 1 valve 85 and a No. 2 valve 86. The support frame 81 is fixed on the right side surface of the cabinet 1. The two side surfaces of the elastic air bag 82 are fixed inside the support frame 81. One end of the No. 1 tube 83 passes through the support frame 81 and the elastic air bag 82 and is connected to the elastic air bag 82, and the No. 1 tube 83 is fixedly sleeved inside the cabinet 1. The other end of the No. 1 tube 83 is fixedly installed with the No. 1 valve 85 and is located inside the cabinet 1. One end of the No. 2 tube 84 passes through the support frame 81 and the elastic air bag 82 and is connected to the elastic air bag 82, and the other end is fixedly installed with the No. 2 valve 86. The air outlet end of the vacuum pump 4 is connected to the elastic air bag 82.

[0047] The pre-storage component 8 realizes storage processing, stores the sulfur hexafluoride insulating gas after suction, adsorption and separation, and when the adsorption stops, realizes output in different directions through the opening and closing control of the No. 1 pipe 83 and the No. 2 pipe 84. When it is input into the cabinet 1 through the No. 1 pipe 83, the backfilling after the separation of harmful gases is realized. When it is output through the No. 2 pipe 84, it cooperates with external equipment to realize output storage to avoid leakage and pollution of the environment during ventilation.

[0048] Among them, the circulation component 11 includes a curved pipe 111, an intermediate frame 112 and an exhaust fan 113. Both ends of the curved pipe 111 are fixed on the back of the cabinet 1 and are connected to the interior of the cabinet 1. The intermediate frame 112 is fixedly installed in the middle of the curved pipe 111 and is connected to the curved pipe 111. The exhaust fan 113 is fixedly arranged inside the intermediate frame 112, and the air cooling part 12 includes a blower.

[0049] The circulation component 11 guides the flow of gas inside the cabinet 1, guides the sulfur hexafluoride insulating gas inside the cabinet 1 to the outside of the cabinet 1, and uses the air cooling part 12 to achieve forced air cooling to improve the heat dissipation effect.

[0050] A method for using a sulfur hexafluoride insulated high-voltage ring network distribution cabinet comprises the following steps:

[0051] Step 1: When processing the internal gas, start the vacuum pump 4, keep the No. 1 valve 85 and the No. 2 valve 86 closed, and open the control valve 2 in the main suction pipe 7, so that the vacuum pump 4 sucks the gas filled in the cabinet 1 out of the cabinet 1 through the main suction pipe 7;

[0052] Step 2: As the sucked gas flows out from the main suction pipe 7, it enters the suction processing assembly 6 along the through hole 10, and the sucked gas flows into the movable frame 62, passes through the internal adsorption part 64, and flows downward from the assembly port 65. The harmful gas in the mixed gas flow is adsorbed in the adsorption part 64, and the filtered and adsorbed sulfur hexafluoride gas is sucked into the vacuum pump 4, and is input into the pre-storage assembly 8 through the gas outlet pipeline;

[0053] Step 3: As the sulfur hexafluoride gas is continuously input into the elastic airbag 82 of the pre-storage component 8, the elastic airbag 82 is inflated and expanded. After the gas inside the cabinet 1 is completely sucked out, the main suction pipe 7 is kept sealed and closed, and the No. 1 valve 85 corresponding to the No. 1 pipe 83 is opened, and the sulfur hexafluoride gas in the elastic airbag 82 is quickly squeezed and sucked into the cabinet 1, and the cleaned sulfur hexafluoride gas is refilled;

[0054] Step 4: Close the No. 1 valve 85, open the air supply pump 5, connect the air supply pump 5 to the storage tank of sulfur hexafluoride gas, and further replenish the sulfur hexafluoride gas into the cabinet 1 to complete the replenishment.

[0055] Step 5: During high-load operation, the exhaust fan 113 in the circulation component 11 is started, and the exhaust fan 113 rotates in the middle frame 112 and sucks gas toward the curved pipe 111 on one side, so that the sulfur hexafluoride gas in the cabinet 1 flows. The sulfur hexafluoride gas in the cabinet 1 is first sucked along the curved pipe 111 at one end, and flows back to the cabinet 1 through the middle frame 112. At the same time, the air cooling part 12 is kept started, and the fan in the air cooling part 12 performs forced air cooling toward the multiple groups of curved pipes 111, and the temperature of the sulfur hexafluoride gas circulating in the curved pipes 111 is reduced.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sulfur hexafluoride insulated high-voltage ring network distribution cabinet, comprising a cabinet body (1), characterized in that: A first frame (2) and a second frame (3) are fixedly provided on both sides of the cabinet (1), a vacuum pump (4) is fixedly provided inside the first frame (2), an air supply pump (5) is fixedly provided inside the second frame (3), a main suction pipe (7) is fixedly provided on the top of the first frame (2), an air suction processing component (6) is provided inside the first frame (2), the vacuum pump (4) is connected to the interior of the cabinet (1) through the air suction processing component (6) and the main suction pipe (7), and the first frame (2) is fixedly provided with a main suction pipe (7). A pre-storage component (8) is fixedly arranged inside the frame (2); an air outlet end of the vacuum pump (4) is connected to the pre-storage component (8); one air outlet direction of the pre-storage component (8) is the interior of the cabinet (1); an air cooling portion (12) is fixedly arranged on the back of the cabinet (1); a circulation component (11) is fixedly arranged on the back of the cabinet (1); both ends of the circulation component (11) are connected to the interior of the cabinet (1); and the circulation component (11) is located on the front of the air cooling portion (12).

2. A sulfur hexafluoride insulated high-voltage ring network distribution cabinet according to claim 1, characterized in that: The air outlet end of the air supply pump (5) is provided with a control valve 2, the air inlet end of the air supply pump (5) is provided with a hose, the hose is connected to an external sulfur hexafluoride gas storage tank, and the air outlet end of the air supply pump (5) is connected to the interior of the cabinet (1).

3. A sulfur hexafluoride insulated high-voltage ring network distribution cabinet according to claim 2, characterized in that: A through hole (10) is provided on the top of the first frame (2), the main suction pipe (7) further comprises a second control valve, the second control valve is connected to the through hole (10), an operating port (9) is provided on the top of the first frame (2), and an adapter port is provided on the side of the first frame (2), the adapter port is connected to the operating port (9).

4. A sulfur hexafluoride insulated high-voltage ring network distribution cabinet according to claim 3, characterized in that: The air intake processing assembly (6) comprises a fixed frame (61), a movable frame (62), a partition (63), an adsorption portion (64), an assembly port (65), a baffle (66) and a middle port (67); the fixed frame (61) is fixedly connected to the interior of the first frame (2), and one end is fixedly sleeved in the adapter port; the movable frame (62) is located in the fixed frame (61); the number of the partitions (63) is two, and the two partitions (63) are fixedly connected to the movable frame (62). ), the assembly opening (65) is opened at the top of the movable frame (62) and penetrates the bottom surface of the movable frame (62), the baffle (66) is fixedly connected in the assembly opening (65) and close to the inner wall of the bottom surface of the movable frame (62), the adsorption portion (64) is sleeved in the assembly opening (65) and placed on the top of the baffle (66), the partitions (63) are symmetrically distributed on both sides of the assembly opening (65), and the middle opening (67) is opened at the top of the fixed frame (61).

5. A sulfur hexafluoride insulated high-voltage ring network distribution cabinet according to claim 4, characterized in that: The middle opening (67) is located below the operating opening (9) and is in communication with the operating opening (9). The middle opening (67) is located on the moving path of the assembly opening (65). A pull rod is fixedly connected to the outer side surface of the partition (63). A damping sleeve is fixedly provided on the outer surface of the movable frame (62). The movable frame (62) is slidably sleeved in the fixed frame (61) via the damping sleeve.

6. A sulfur hexafluoride insulated high-voltage ring network distribution cabinet according to claim 5, characterized in that: The top of the fixing frame (61) is connected to the through hole (10) via the first connecting hole, and the bottom of the fixing frame (61) is connected to the suction end of the vacuum pump (4) via the second connecting hole.

7. A sulfur hexafluoride insulated high-voltage ring network distribution cabinet according to claim 6, characterized in that: The pre-storage component (8) comprises a support frame (81), an elastic airbag (82), a first tube (83), a second tube (84), a first valve (85) and a second valve (86); the support frame (81) is fixed on the right side surface of the cabinet (1); the two side surfaces of the elastic airbag (82) are fixed inside the support frame (81); one end of the first tube (83) passes through the support frame (81) and the elastic airbag (82) and is connected to the elastic airbag (82); the first tube (83) is fixedly sleeved inside the cabinet (1); the other end of the first tube (83) is fixedly installed with the first valve (85) and is located inside the cabinet (1); one end of the second tube (84) passes through the support frame (81) and the elastic airbag (82) and is connected to the elastic airbag (82); the other end is fixedly installed with the second valve (86); the air outlet end of the vacuum pump (4) is connected to the elastic airbag (82).

8. The sulfur hexafluoride insulated high-voltage ring network distribution cabinet according to claim 7, characterized in that: The circulation component (11) comprises a curved pipe (111), an intermediate frame (112) and an exhaust fan (113); both ends of the curved pipe (111) are fixed to the back of the cabinet (1) and are in communication with the interior of the cabinet (1); the intermediate frame (112) is fixedly mounted in the middle of the curved pipe (111) and is in communication with the curved pipe (111); the exhaust fan (113) is fixedly arranged inside the intermediate frame (112); and the air cooling unit (12) comprises a blower.

9. The method for using a sulfur hexafluoride insulated high-voltage ring network distribution cabinet according to any one of claims 1 to 8, characterized in that: The steps include: Step 1: When processing the internal gas, the vacuum pump (4) is started, while keeping the No. 1 valve (85) and the No. 2 valve (86) closed, and the control valve 2 in the main suction pipe 7 is opened, and the vacuum pump (4) sucks the gas filled in the cabinet (1) out of the cabinet (1) through the main suction pipe (7); Step 2: As the sucked gas flows out of the main suction pipe 7, it enters the suction processing assembly (6) along the through hole (10), and the sucked gas flows into the movable frame (62), passes through the internal adsorption portion (64), and flows downward from the assembly port (65). The harmful gas in the mixed gas flow is adsorbed in the adsorption portion (64), and the sulfur hexafluoride gas after filtering and adsorption is sucked into the vacuum pump (4), and is input into the pre-storage assembly (8) through the gas outlet pipeline; Step 3: As the sulfur hexafluoride gas is continuously input into the elastic airbag (82) of the pre-storage component (8), the elastic airbag (82) is inflated and expanded. After the gas inside the cabinet (1) is completely sucked out, the main suction pipe 7 is kept sealed and closed, and the No. 1 valve (85) corresponding to the No. 1 pipe (83) is opened, and the sulfur hexafluoride gas in the elastic airbag (82) is quickly squeezed and sucked into the cabinet (1), and the cleaned sulfur hexafluoride gas is refilled; Step 4: Close valve No. 1 (85), open the air supply pump (5), connect the air supply pump (5) to the storage tank of sulfur hexafluoride gas, and further replenish the sulfur hexafluoride gas into the cabinet (1), thus completing the replenishment. Step 5: During high-load operation, the exhaust fan (113) in the circulation component (11) is started, the exhaust fan (113) rotates in the middle frame (112), and sucks gas toward the curved pipe (111) on one side, so that the sulfur hexafluoride gas in the cabinet (1) flows. The sulfur hexafluoride gas in the cabinet (1) is first sucked along the curved pipe (111) at one end, and flows back into the cabinet (1) through the middle frame (112). At the same time, the air cooling part (12) is kept started, and the fan in the air cooling part (12) performs forced air cooling toward the multiple groups of curved pipes (111), so that the temperature of the sulfur hexafluoride gas flowing in the curved pipes (111) decreases.

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