An energy supply transformer device for current limiting devices at voltage levels above 110kv

Abstract

The present invention discloses an energy supply transformer device for a current limiting device with a voltage level of 110kv or above, and relates to the technical field of energy supply transformers. The present invention includes an equipment base, and also includes: an energy supply transformer unit, including a lower fixed flange fixed to the equipment base by multiple sets of screws, and an upper fixed flange is installed on the lower fixed flange through a sealing mechanism; a control supplement unit, including an air return component and an air supply component. The advantages are: the device is small in size and simple in process, and is suitable for use on deep current limiting devices with a voltage level of 110kv or above, and the composite material insulation sealing cylinder used can not only realize the insulation sealing of the transformer winding, but also realize the installation and load bearing of the upper current limiting device. During operation, it is not affected by external factors such as altitude, temperature difference, humidity difference and pollution level, and can also realize the seepage recovery and quantitative supplement of insulating gas, ensuring the insulation of the equipment and realizing stable power supply, which is safer and more environmentally friendly.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to an energy supply transformer device used for a current limiting device at a voltage level of 110kV or above. Background Art

[0002] Energy transformer is an electric power equipment used in power system to convert electric power from one voltage level to another voltage level. It is mainly used to cooperate with current limiting device to realize stable voltage transformation and transmission of current.

[0003] For example, an energy supply isolation transformer with publication number CN216528289U comprises an insulating cylinder and a shell arranged below the insulating cylinder, the bottom of the insulating cylinder and the top of the shell are fixedly connected and communicated with each other, and a grading ring is provided at the junction of the insulating cylinder and the top of the shell; a high-voltage coil and a low-voltage coil are arranged in the shell, and the space between the high-voltage coil and the low-voltage coil is filled with sulfur hexafluoride gas and has no solid medium;

[0004] The existing energy supply transformer has insufficient insulation performance in actual use and cannot meet the insulation requirements of the working platform with a voltage level of 110kv and above to the ground. While ensuring the withstand voltage, the power of the existing energy supply transformer is low and cannot meet the use requirements. In addition, the existing energy supply transformer is large in size and cannot be used on the zero-loss deep current limiting device.

[0005] For example, the prior art referred to above is large in size and has insufficient insulation performance. It is unable to transmit the AC220V current to the ground to the 110kv and above platforms for power supply. Moreover, the insulating gas filled therein will gradually seep out during long-term use due to factors such as device aging and reduced sealing performance, which will reduce the internal insulating gas content and lead to a decrease in insulation performance. Moreover, the sulfur hexafluoride used in the device has a strong greenhouse effect hazard, and its seepage will cause greater pollution to the air environment.

[0006] Therefore, it is urgent to design an energy supply transformer device for a current limiting device at a voltage level of 110kv or above to solve the above problems. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides an energy supply transformer device for a current limiting device with a voltage level above kV, which solves the problems raised in the above-mentioned background technology.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an energy supply transformer device for a current limiting device of a voltage level above 110kv, comprising an equipment base, and also comprising:

[0009] The energy supply transformer unit comprises a lower fixing flange fixed to the equipment base by a plurality of sets of screws, an upper fixing flange is mounted on the lower fixing flange by a sealing mechanism, and an insulating sealing cylinder is arranged in the sealing mechanism, the upper fixing flange is used to install an existing depth current limiting device, and an insulating component is installed between the insulating sealing cylinder and the equipment base;

[0010] The control replenishment unit is used to detect the insulating gas content in the insulating sealing tube and recover and automatically replenish the insulating gas, including a return air component and a gas replenishment component, wherein the return air component is used to recover the insulating gas leaking from the insulating sealing tube, and the gas replenishment component is used to replenish the insulating gas into the insulating sealing tube.

[0011] Preferably, the sealing mechanism includes an insulating sealing cylinder bonded to the lower fixed flange, an upper fixed flange is fixed to the upper part of the insulating sealing cylinder by multiple sets of screws, a sealed outlet box is sealed and bonded to the upper fixed flange, and sealing rings for sealing are arranged between the upper fixed flange, the lower fixed flange and the insulating sealing cylinder.

[0012] Preferably, the insulating assembly comprises a sealing cylinder cavity opened in the insulating sealing cylinder, a transformer winding is arranged in the sealing cylinder cavity, and a low-voltage junction box matched with the transformer winding is arranged on the equipment base, and a connecting wire is arranged between the transformer winding and the sealed outlet box;

[0013] An air filling mechanism is arranged between the insulating sealing cylinder and the equipment base.

[0014] Preferably, the inflation mechanism comprises an injection pipe fixedly installed between the equipment base and the insulating sealing cylinder for injecting insulating gas, and the gas outlet end of the injection pipe is located in the sealing cylinder cavity, and an inflation valve is provided on the gas inlet end of the injection pipe, and the inflation valve is connected to an external insulating gas inflation pump, and a pressure gauge for monitoring the insulating gas pressure is provided on the inflation valve;

[0015] A trigger mechanism is arranged in the insulating sealing cylinder.

[0016] Preferably, the trigger mechanism comprises a gas compressor disc slidably mounted in the cavity of the sealing cylinder, and the transformer winding is located at the lower part of the gas compressor disc, a sealing protective sleeve is provided on the connecting line, and the sealing protective sleeve is slidably connected to the gas compressor disc, and a plurality of reset springs are fixedly mounted between the gas compressor disc and the top wall of the cavity of the sealing cylinder;

[0017] An upper limit plate and a lower limit plate matched with the air compressor disc are fixedly installed in the cavity of the sealing cylinder, a trigger rod is fixedly installed at the lower part of the air compressor disc, and a touch button matched with the trigger rod is fixedly installed on the lower limit plate.

[0018] Preferably, the air return assembly includes an outer ring cavity opened in an insulating sealing cylinder, a recovery cylinder for recovering insulating gas is arranged in the base of the equipment, and a return air pipe for conducting insulating gas is fixedly connected between the recovery cylinder and the outer ring cavity, and an air supply mechanism is installed on the recovery cylinder.

[0019] Preferably, the gas replenishing assembly includes a gas replenishing box arranged in the equipment base, the gas injection pipe is fixedly connected to a gas injection branch pipe, and the gas injection branch pipe is located in the gas replenishing box, the gas injection branch pipe is used to fill the insulating gas to be replenished into the gas replenishing box, and a gas compression mechanism is installed on the gas replenishing box.

[0020] Preferably, the air compressing mechanism includes an air supply pipe fixedly connected between the air supply box and the insulating sealing cylinder, and the air outlet end of the air supply pipe is located in the cavity of the sealing cylinder, an electric telescopic cylinder is arranged in the air supply box, and the electric telescopic cylinder cooperates with the touch button, and an air compression plate is arranged on the driving end of the electric telescopic cylinder, and the air compression plate is slidably installed in the air supply box.

[0021] Preferably, the upper air mechanism includes a partition plate fixedly installed in the recovery cylinder, and the lower part of the partition plate in the recovery cylinder is filled with cleaning water for cleaning the insulating gas, a filter screen is provided in the partition plate, an upper air pipe for recovering the insulating gas is fixedly connected between the air supply box and the recovery cylinder, and a displacement pipe for replacing the cleaning water is provided between the recovery cylinder and the equipment base.

[0022] Preferably, a plurality of ceramic insulating rings for increasing the insulating effect are arranged on the outside of the insulating sealing cylinder, and a supporting pad for increasing the supporting stability is arranged on the lower part of the equipment base.

[0023] The present invention provides an energy supply transformer device for a current limiting device of a voltage level above 110kv. It has the following beneficial effects:

[0024] 1. When the energy supply transformer device is actually used, the arrangement of the insulating sealing cylinder and the lower fixing flange and the lower fixing flange can not only realize the effective insulation of the internal transformer winding, but also support and install the external deep current limiting device, and can effectively bear the load of the upper current limiting device, and has strong practicality.

[0025] 2. When the energy supply transformer device is actually used, the transformer winding is arranged in the sealing cylinder cavity of the insulating sealing cylinder and the sealing cylinder cavity is filled with insulating gas, so that the insulation of the transformer winding can be effectively achieved, and the sealing cylinder cavity is in a sealed state with the outside, so that when the voltage is transformed, the operation consistency and safety of the transformer equipment are stronger.

[0026] 3. When the energy transformer device is actually used, it can monitor the insulating gas content in the sealing tube cavity in real time, and can collect the insulating gas leaking out of the sealing tube cavity, effectively preventing the insulating gas from penetrating into the external atmosphere and causing a greater greenhouse effect and air pollution.

[0027] 4. When the energy supply transformer device is actually used, when the insulating gas in the sealing tube cavity is reduced to a certain level, the insulating gas can be automatically replenished into the sealing tube cavity, so that the transformer winding in the sealing tube cavity always maintains strong insulation. There is no need for the staff to regularly replenish the insulating gas, and the service life is longer.

[0028] In summary, the device is small in size and simple in process. It is suitable for use on deep current limiting devices with voltage levels above 110kv. The composite material insulating sealing cylinder used can not only realize the insulation sealing of the transformer winding but also realize the installation and load bearing of the upper current limiting device. During operation, it is not affected by external factors such as altitude, temperature difference, humidity difference and pollution level. It can also realize the seepage recovery and quantitative replenishment of insulating gas, ensure the insulation of the equipment and achieve stable power supply, which is safer and more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

[0030] Figure 1 This is a schematic diagram of the structure of an energy supply transformer device for a current limiting device at a voltage level of 110kv or above proposed by the present invention;

[0031] Figure 2 for Figure 1 A front view of

[0032] Figure 3 for Figure 1 A top view of

[0033] Figure 4 for Figure 3 AA surface structural section view of the equipment base and insulating sealing cylinder;

[0034] Figure 5 for Figure 4 Schematic diagram of the three-dimensional structure;

[0035] Figure 6 for Figure 1 Schematic diagram of structural decomposition;

[0036] Figure 7 for Figure 1 Schematic diagram of the internal structure of the middle insulating sealing cylinder and the equipment base;

[0037] Figure 8 for Figure 7 Schematic diagram of the internal structure of the middle insulating sealing cylinder;

[0038] Fig. 9 for Figure 8 A magnified view of the node in the middle B area;

[0039] Fig.10 for Figure 8 Schematic diagram of the structure of the middle air supply box and the recovery cylinder;

[0040] Fig.11 for Fig.10 Schematic diagram of the internal structure of the middle air supply box;

[0041] Fig.12 for Fig.10 Schematic diagram of the internal structure of the recovery cylinder.

[0042] In the figure: 1 equipment base, 2 support pad, 3 lower fixing flange, 4 insulating sealing cylinder, 5 upper fixing flange, 6 sealed outlet box, 7 charging valve, 8 pressure gauge, 9 low-voltage junction box, 10 air supply box, 11 recovery cylinder, 12 sealing cylinder cavity, 13 air injection pipe, 14 return pipe, 15 transformer winding, 16 air compressor, 17 connecting wire, 18 upper limit plate, 19 reset spring, 20 outer ring cavity, 21 trigger rod, 22 touch button, 23 sealing protective sleeve, 24 air supply pipe, 25 upper air pipe, 26 air injection branch pipe, 27 electric telescopic cylinder, 28 air compressor plate, 29 partition plate, 30 filter screen plate, 31 replacement pipe, 32 lower limit plate, 33 ceramic insulating ring. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0044] Example 1: Reference Figure 1-Figure 4 A power supply transformer device for a current limiting device of a voltage level above 110kv includes an equipment base 1, and a support pad 2 for improving support stability is arranged at the lower part of the equipment base 1. The support pad 2 can support the equipment base 1 and effectively improve the placement stability of the equipment base 1.

[0045] The energy supply transformer device also includes:

[0046] The energy supply transformer unit comprises a lower fixing flange 3 fixed on the equipment base 1 by a plurality of sets of screws, an upper fixing flange 5 is installed on the lower fixing flange 3 by a sealing mechanism, and an insulating sealing cylinder 4 is arranged in the sealing mechanism, and the lower fixing flange 3 is fixedly installed on the equipment base 1 by a plurality of sets of screws, so as to facilitate installation and disassembly;

[0047] The upper fixed flange 5 is used to install the existing deep current limiting device, wherein the current limiting device includes a circuit breaker, a controller, and a reactor, etc. The current limiting device is used to limit the current in the circuit to protect the circuit and equipment from damage by excessive current. The upper fixed flange 5 can also be installed and used in parallel with other sets of equipment of the current limiting device to realize the installation of the current limiting device or other equipment, and bear the load of the current limiting device, thereby improving the installation stability of the current limiting device.

[0048] The control replenishment unit is used to detect the insulating gas content in the insulating sealing tube 4 and to recover and automatically replenish the insulating gas, so that the insulating performance in the insulating sealing tube 4 always remains stable. The insulating gas is mainly composed of sulfur hexafluoride, which can provide good insulation performance for the device and improve the stability of the transformer operation process.

[0049] The outside of the insulating sealing cylinder 4 is provided with a plurality of ceramic insulating rings 33 for increasing the insulating effect. The ceramic insulating rings 33 have strong insulation and high temperature resistance, which can effectively prevent electrical breakdown, and also can stabilize the electrical performance of the power supply transformer, and are more secure.

[0050] A control console is provided on the equipment base 1, and the control console is used to control the operating status of the energy supply transformer unit and the control supplement unit, and to realize the gas pressure prompt and early warning of the insulating gas.

[0051] Example 2: Reference Figure 1 as well as Figure 3-Figure 9 The technical solution of this embodiment is different from that of the first embodiment in that: the sealing mechanism includes an insulating sealing cylinder 4 fixed to the lower fixed flange 3 by adhesive bonding, an upper fixed flange 5 is fixed to the upper part of the insulating sealing cylinder 4 by multiple sets of screws, and a sealed outlet box 6 is sealed and glued to the upper fixed flange 5;

[0052] The upper and lower parts of the insulating sealing cylinder 4 are respectively connected to the upper fixed flange 5 and the lower fixed flange 3, and sealing rings for sealing are arranged between the upper fixed flange 5, the lower fixed flange 3 and the insulating sealing cylinder 4, which effectively improves the connection stability and sealing performance between the insulating sealing cylinder 4 and the upper fixed flange 5, the lower fixed flange 3, and the insulating sealing cylinder 4 plays the role of external support, which can effectively bear the load of the current limiting device on the upper part of the upper fixed flange 5.

[0053] An insulating assembly is installed between the insulating sealing cylinder 4 and the equipment base 1. The insulating assembly includes a sealing cylinder cavity 12 opened in the insulating sealing cylinder 4. A transformer winding 15 is arranged in the sealing cylinder cavity 12. A low-voltage junction box 9 matched with the transformer winding 15 is arranged on the equipment base 1. A connecting wire 17 is arranged between the transformer winding 15 and the sealed outlet box 6.

[0054] The external AC220V current to the ground passes through the low-voltage junction box 9 and enters the transformer winding 15, and after being transformed by the transformer winding 15, it is transmitted to the sealed outlet box 6 through the connecting line 17, and enters the upper depth current limiting device through the sealed outlet box 6, and is sent to the 110kv and above platforms through the current limiting device, which can power the equipment on the 110kV and above platforms, thereby realizing the current transformation and transmission of voltage levels above 110kV.

[0055] In a further embodiment, an air filling mechanism is provided between the insulating sealing cylinder 4 and the equipment base 1, and the air filling mechanism includes an air filling pipe 13 fixedly installed between the equipment base 1 and the insulating sealing cylinder 4 for filling insulating gas, and the air outlet end of the air filling pipe 13 is located in the sealing cylinder cavity 12, and an air filling valve 7 is provided on the air inlet end of the air filling pipe 13, and the air filling valve 7 is connected to an external insulating gas filling pump, and a pressure gauge 8 for monitoring the pressure of the insulating gas is provided on the air filling valve 7;

[0056] When the transformer winding 15 is installed and the sealing cylinder cavity 12 is sealed, the inflation valve 7 can be opened to pump the insulating gas into the sealing cylinder cavity 12 through the external inflation pump through the gas injection pipe 13, and the insulating gas in the sealing cylinder cavity 12 is fully filled. At this time, the insulating gas will wrap the transformer winding 15 in the sealing cylinder cavity 12 to achieve external insulation of the transformer winding 15, effectively improving the insulation pressure resistance of the transformer winding 15;

[0057] A trigger mechanism is provided in the insulating sealing cylinder 4, and the trigger mechanism includes a gas pressure plate 16 slidably mounted in the sealing cylinder cavity 12, and the transformer winding 15 is located at the lower part of the gas pressure plate 16, a sealing protective sleeve 23 is provided on the connecting line 17, and the sealing protective sleeve 23 is slidably connected to the gas pressure plate 16, and a plurality of reset springs 19 are fixedly installed between the gas pressure plate 16 and the top wall of the sealing cylinder cavity 12;

[0058] An upper limit plate 18 and a lower limit plate 32 that match the air compressor 16 are fixedly installed in the sealing cylinder cavity 12. An air pressure sensor is arranged in the sealing cylinder cavity 12. The air pressure sensor is used to monitor the air pressure of the insulating gas in the sealing cylinder cavity 12 in real time. When the insulating gas is injected into the sealing cylinder cavity 12, as the insulating gas gradually increases, the air pressure in the sealing cylinder cavity 12 gradually increases, that is, the air compressor 16 is gradually pushed upward. When the air compressor 16 moves upward, it compresses multiple return springs 19. When the air compressor 16 moves upward to the point of being squeezed and contacted with the upper limit plate 18, it cannot move upward any further. At this time, the injection of the insulating gas is completed and the pressure conversion can be started.

[0059] A trigger rod 21 is fixedly installed at the lower part of the air compressor 16, and a touch button 22 that cooperates with the trigger rod 21 is fixedly installed on the lower limit plate 32. When the device is used for a long time or the sealing is poor due to factors such as equipment aging, equipment failure, sealing damage, physical damage, etc., the insulating gas in the sealing tube cavity 12 will gradually seep out, resulting in a decrease in the content of the insulating gas. At this time, the air pressure sensor will detect a decrease in the air pressure of the insulating gas. While the air pressure decreases, the air compressor 16 will gradually move downward under the reset extension action of the reset spring 19 and the action of gravity, thereby driving the trigger rod 21 at the lower part of the air compressor 16 to move downward. When the trigger rod 21 moves down to contact the touch button 22, the touch button 22 will be triggered. When the touch button 22 is triggered, it means that insulating gas needs to be supplemented into the sealing tube cavity 12 to ensure the insulation of the transformer winding 15.

[0060] Example 3: Reference Figure 5 , Figure 7-Figure 8 as well as Figure 10-12 The difference between this embodiment and the second embodiment is that the control and replenishment unit includes a return air component and a replenishment air component, wherein the return air component is used to recover the insulating gas leaking out of the insulating sealing tube 4, and the replenishment air component is used to replenish the insulating gas into the insulating sealing tube 4;

[0061] The return air component includes an outer ring cavity 20 opened in the insulating sealing tube 4. The outer ring cavity 20 is arranged inside the insulating sealing tube 4, and is located outside the sealing tube cavity 12 and wraps the sealing tube cavity 12. That is, if the insulating gas in the sealing tube cavity 12 escapes, the insulating gas inside will only penetrate into the outer ring cavity 20, and will not directly penetrate to the outside of the insulating sealing tube 4 from other parts.

[0062] In a further embodiment, the gas replenishing assembly includes a gas replenishing box 10 arranged in the equipment base 1, and the gas injection pipe 13 is fixedly connected with a gas injection branch pipe 26, and the gas injection branch pipe 26 is located in the gas replenishing box 10, and the gas injection branch pipe 26 is used to fill the insulating gas to be replenished into the gas replenishing box 10. When the gas injection pipe 13 replenishes gas into the sealing cylinder cavity 12, the gas injection branch pipe 26 can be opened to inject a part of the insulating gas into the gas replenishing box 10 through the gas injection branch pipe 26 for temporary storage, so as to automatically replenish the insulating gas in the sealing cylinder cavity 12 when the insulating gas in the sealing cylinder cavity 12 is reduced;

[0063] The air-compression mechanism is installed on the air-compensating box 10, and the air-compressing mechanism includes an air-compensating pipe 24 fixedly connected between the air-compensating box 10 and the insulating sealing tube 4, and the air outlet end of the air-compensating pipe 24 is located in the sealing tube cavity 12, and an electric telescopic cylinder 27 is arranged in the air-compensating box 10, and the electric telescopic cylinder 27 cooperates with the touch button 22, and an air-compressing plate 28 is arranged on the driving end of the electric telescopic cylinder 27, and the air-compressing plate 28 is slidably installed in the air-compensating box 10;

[0064] If the air pressure sensor detects that the air pressure in the sealing cylinder cavity 12 is low and the touch button 22 has been triggered, the touch button 22 will be triggered to control the electric telescopic cylinder 27 to start through the controller. The electric telescopic cylinder 27 will drive the air pressure plate 28 on its driving end to move in the air supply box 10, and open the air supply pipe 24 at the same time. When the air pressure plate 28 moves, the insulating gas temporarily stored in the air supply box 10 will be pressed into the sealing cylinder cavity 12 through the air supply pipe 24, so as to realize the automatic replenishment of the insulating gas in the sealing cylinder cavity 12, so as to ensure the insulation stability of the transformer winding 15 in the sealing cylinder cavity 12;

[0065] When the touch button 22 is triggered, an early warning report will be sent to the inspector of the energy supply transformer through the console to remind the inspector that the energy supply transformer may leak and to remind the inspector to perform maintenance and repair in time, thereby further improving the safety of the operation of the energy supply transformer;

[0066] The following effects are achieved through the above operations: If the sealing of the power supply transformer decreases due to equipment aging, equipment failure, seal damage, physical damage and other factors during operation, and the insulating gas in the insulating sealing tube 4 leaks out more, the insulation effect of the power supply transformer during operation is significantly reduced, and the safety of its operation is significantly reduced. At this time, there is a greater safety risk when continuing to work. The above-mentioned air compression mechanism can realize automatic replenishment of the insulating sealing tube 4. That is, when the power supply transformer leaks and the maintenance personnel are unable to repair it in time, the air compression mechanism can be used to automatically replenish the insulating gas so that the power supply transformer can continue to work normally in a short time, avoiding safety risks until the maintenance personnel complete the maintenance, thereby effectively improving the safety of the use of the power supply transformer.

[0067] In a further embodiment, a recovery cylinder 11 for recovering insulating gas is provided in the equipment base 1, and a return air pipe 14 for conducting insulating gas is fixedly connected between the recovery cylinder 11 and the outer ring cavity 20, and the insulating gas leaking from the sealing cylinder cavity 12 will enter the outer ring cavity 20 for collection, and will enter the recovery cylinder 11 through the return air pipe 14 for storage;

[0068] The recovery cylinder 11 is provided with an air supply mechanism, which includes a partition plate 29 fixedly installed in the recovery cylinder 11, and the lower part of the partition plate 29 in the recovery cylinder 11 is filled with cleaning water for cleaning the insulating gas, and a filter screen plate 30 is provided in the partition plate 29. An air supply pipe 25 for recovering the insulating gas is fixedly connected between the air supply box 10 and the recovery cylinder 11;

[0069] The gas outlet end of the return air pipe 14 is arranged at the lower part of the recovery tube 11, that is, below the water surface of the cleaning water, so that the insulating gas will directly enter the cleaning water when it is discharged through the return air pipe 14. Since the insulating gas is insoluble in water, the insulating gas will emerge from the upper part of the cleaning water after passing through the cleaning water, and will be conducted to the upper part of the recovery tube 11 for storage and collection through the filter screen plate 30 of the separation plate 29. After passing through the cleaning water, the insulating gas will be cleaned by the cleaning water, and the impurities in it will be washed away by the cleaning water, completing the cleaning and storage and collection of the insulating gas.

[0070] In a further embodiment, a compressed air ring can be slidably arranged in the outer ring cavity 20, and a micro-electric telescopic rod is arranged between the compressed air ring and the top wall of the outer ring cavity 20. The compressed air ring is driven by the micro-electric telescopic rod to vertically move up and down in the outer ring cavity 20, so that the insulating gas in the outer ring cavity 20 can be squeezed when the compressed air ring moves downward, making it easier for the insulating gas to enter the recovery cylinder 11 through the return air pipe 14 for collection;

[0071] After the insulating gas in the gas replenishing box 10 is replenished, the electric telescopic cylinder 27 can be used to drive the gas pressure plate 28 to move leftward in the gas replenishing box 10 (see the attached manual). Fig.11 As shown in the direction, the same applies below), the air pressure plate 28 moves leftward while closing the air supply pipe 24 and opening the upper air pipe 25, so that when the air pressure plate 28 moves leftward, negative pressure is generated in the air supply box 10, and the insulating gas in the recovery cylinder 11 is automatically sucked into the air supply box 10 through the upper air pipe 25 for replenishment. When the air pressure plate 28 moves rightward in the air supply box 10, the air supply pipe 24 is opened and the upper air pipe 25 is closed, so that the air pressure plate 28 moves rightward to press the insulating gas in the air supply box 10 into the sealing cylinder cavity 12 in the insulating sealing cylinder 4 through the air supply pipe 24 for replenishment, thereby realizing the recycling of the insulating gas;

[0072] A replacement pipe 31 for replacing cleaning water is provided between the recovery cylinder 11 and the equipment base 1. The replacement pipe 31 is used for regular replacement of cleaning water to ensure that the cleaning water in the recovery cylinder 11 is clean and tidy.

[0073] Electric control valves are provided in the return air pipe 14, the air supply pipe 24, the upper air pipe 25, the air injection pipe 13, and the air injection branch pipe 26. The opening and closing of multiple electric control valves are controlled by the control console to realize automatic opening and closing of the above-mentioned pipe bodies, thereby realizing automatic and intelligent transmission of insulating gas.

[0074] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A power transformer device for a current limiting device at a voltage level of 110 kV or above, comprising a device base (1), characterized in that: Also includes: An energy supply transformer unit comprises a lower fixing flange (3) fixed to an equipment base (1) by means of a plurality of sets of screws, an upper fixing flange (5) being mounted on the lower fixing flange (3) by means of a sealing mechanism, and an insulating sealing cylinder (4) being arranged in the sealing mechanism, the upper fixing flange (5) being used for mounting an existing depth current limiting device, an insulating assembly being installed between the insulating sealing cylinder (4) and the equipment base (1), and an air injection pipe (13) being arranged in the insulating assembly; A control and replenishment unit, used to detect the insulating gas content in the insulating sealing tube (4) and to recover and automatically replenish the insulating gas, comprising an air return component and an air replenishment component, wherein the air return component is used to recover the insulating gas leaking out of the insulating sealing tube (4), and the air replenishment component is used to replenish the insulating gas into the insulating sealing tube (4); The gas replenishment assembly comprises a gas replenishment box (10) arranged in a device base (1); the gas injection pipe (13) is fixedly connected to a gas injection branch pipe (26), and the gas injection branch pipe (26) is located in the gas replenishment box (10); the gas injection branch pipe (26) is used to fill the gas replenishment box (10) with insulating gas to be replenished; and a gas compression mechanism is installed on the gas replenishment box (10); The air compressing mechanism comprises an air supply pipe (24) fixedly connected between the air supply box (10) and the insulating sealing cylinder (4); an electric telescopic cylinder (27) is arranged in the air supply box (10); a pressure plate (28) is arranged on the driving end of the electric telescopic cylinder (27); and the pressure plate (28) is slidably mounted in the air supply box (10); A recovery cylinder (11) for recovering insulating gas is arranged in the equipment base (1), and an air-raising mechanism is installed on the recovery cylinder (11), the air-raising mechanism comprises a partition plate (29) fixedly installed in the recovery cylinder (11), and the recovery cylinder (11) is filled with cleaning water for cleaning the insulating gas at the lower part of the partition plate (29), and a filter screen (30) is arranged in the partition plate (29), an upper air pipe (25) for recovering insulating gas is fixedly connected between the air replenishing box (10) and the recovery cylinder (11), and a displacement pipe (31) for displacing the cleaning water is arranged between the recovery cylinder (11) and the equipment base (1).

2. The energy supply transformer device for a current limiting device of a voltage level above 110kv according to claim 1, characterized in that: The sealing mechanism comprises an insulating sealing cylinder (4) fixed by adhesive bonding to a lower fixed flange (3); an upper fixed flange (5) is fixed to the upper portion of the insulating sealing cylinder (4) by means of a plurality of sets of screws; a sealed outlet box (6) is sealingly bonded to the upper fixed flange (5); and sealing rings for sealing are provided between the upper fixed flange (5), the lower fixed flange (3) and the insulating sealing cylinder (4).

3. The energy supply transformer device for a current limiting device of a voltage level above 110kv according to claim 2, characterized in that: The insulating assembly comprises a sealing cylinder cavity (12) opened in the insulating sealing cylinder (4), a transformer winding (15) is arranged in the sealing cylinder cavity (12), and a low-voltage junction box (9) matched with the transformer winding (15) is arranged on the equipment base (1), and a connecting wire (17) is arranged between the transformer winding (15) and the sealed outlet box (6); An air charging mechanism is provided between the insulating sealing cylinder (4) and the equipment base (1).

4. The energy supply transformer device for a current limiting device of a voltage level above 110kv according to claim 3, characterized in that: The gas charging mechanism comprises a gas injection pipe (13) fixedly mounted between the equipment base (1) and the insulating sealing cylinder (4) for injecting insulating gas, wherein the gas outlet end of the gas injection pipe (13) is located in the sealing cylinder cavity (12), a gas charging valve (7) is arranged on the gas inlet end of the gas injection pipe (13), and the gas charging valve (7) is connected to an external insulating gas charging pump, and a pressure gauge (8) for monitoring the pressure of the insulating gas is arranged on the gas charging valve (7); A trigger mechanism is arranged inside the insulating sealing cylinder (4).

5. The energy supply transformer device for a current limiting device of a voltage level above 110kv according to claim 4, characterized in that: The trigger mechanism comprises a gas pressure plate (16) slidably mounted in a sealing cylinder cavity (12), and the transformer winding (15) is located at the bottom of the gas pressure plate (16); a sealing protective sleeve (23) is provided on the connecting line (17), and the sealing protective sleeve (23) is slidably connected to the gas pressure plate (16); and a plurality of return springs (19) are fixedly mounted between the gas pressure plate (16) and the top wall of the sealing cylinder cavity (12); An upper limit plate (18) and a lower limit plate (32) that match the air pressure disc (16) are fixedly mounted in the sealing cylinder cavity (12); a trigger rod (21) is fixedly mounted at the bottom of the air pressure disc (16); and a touch button (22) that matches the trigger rod (21) is fixedly mounted on the lower limit plate (32).

6. The energy supply transformer device for a current limiting device of a voltage level above 110kv according to claim 5, characterized in that: The air return assembly comprises an outer annular cavity (20) opened in the insulating sealing cylinder (4), and an air return pipe (14) for conducting insulating gas is fixedly connected between the recovery cylinder (11) and the outer annular cavity (20).

7. The energy supply transformer device for a current limiting device of a voltage level above 110kv according to claim 6, characterized in that: The air outlet end of the air supply pipe (24) is located in the sealing cylinder cavity (12); a plurality of ceramic insulating rings (33) for increasing the insulation effect are arranged outside the insulating sealing cylinder (4); the electric telescopic cylinder (27) cooperates with the touch button (22); and a support pad (2) for increasing the support stability is arranged at the bottom of the equipment base (1).

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