Horizontal transverse arrangement structure for oil sleeve of large power transformer

Abstract

The utility model relates to the technical field of transformers, and discloses a structure for horizontally arranging an oil sleeve of a large power transformer, which comprises a spliced integral bus box, an oil-oil casing; a conducting integrated pipeline is externally arranged; a support frame; according to the utility model, the high 220Kv-grade high-pressure oil sleeve is horizontally arranged, so that the problems of high volume and heavy weight of the transformer can be effectively solved, and meanwhile, as the internal lead does not span a cabin, the clamping support of insulating consumables at the connecting part of the internal lead in the background problem is canceled, and the working efficiency is improved. An insulating cylinder at the tail of an internal sleeve in the background problem is canceled through special treatment of additionally covering an insulating layer on a voltage-sharing ball at the tail of the sleeve, integrated oil injection and drainage of a transformer body and an overall bus box are achieved through arrangement of an external conduction pipeline and a valve, oil drainage can be conducted only for an overhaul area during oil drainage overhaul, and the oil drainage efficiency is improved. The overall oil drainage amount can be effectively reduced, and the maintenance efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and more specifically, it relates to a horizontally placed structure for the oil bushing of a large power transformer. Background Technology

[0002] When using oil-oil bushings in transformers, 220kV high-voltage bushings are mostly placed vertically or at an angle. To prevent the equalizing sphere of the high-voltage bushing from discharging to ground potential during power frequency and impulse tests, an insulating paper tube is installed on the outside of the equalizing sphere to ensure the insulation distance of the bushing end to the sharp corner of ground potential. However, transformers using this method of arranging oil-oil bushings often have the following problems:

[0003] First, it is tall and heavy;

[0004] 2. Insulating components such as clamping and fixing insulating materials must be installed at the internal lead wire connection points;

[0005] 3. An insulating paper tube must be installed at the tail of the internal sleeve;

[0006] This also results in the oil-oil bushing structure used in conventional transformers being not only structurally complex, but also difficult to manufacture, install, and maintain.

[0007] To solve the above problems, it is urgent to develop a horizontally placed structure for the oil bushing of large power transformers. Utility Model Content

[0008] The purpose of this utility model is to provide a horizontally placed structure for the oil bushing of large power transformers in order to solve the above problems.

[0009] This utility model provides a horizontally positioned structure for the oil bushing of a large power transformer, comprising:

[0010] The modular integrated busbar box includes a near-end busbar box connected to the transformer body, a CT end busbar box connected to the other end of the near-end busbar box, a flange connected to the other end of the CT end busbar box, and a far-end busbar box connected to the flange. The near-end busbar box, the CT end busbar box, the flange, and the transformer body form an independent chamber one, and the flange and the far-end busbar box form an independent chamber two. A valve is provided on the far-end busbar box near the other end.

[0011] The oil sleeve is horizontally connected to the middle of the flange, with one end in independent chamber one and the other end in independent chamber two. Both ends of the oil sleeve are provided with equalizing balls and additional insulation layers.

[0012] An external conductive integrated conduit is located outside the spliced ​​integrated busbar box, and the external conductive integrated conduit is used to connect independent chamber one and independent chamber two;

[0013] A support frame, which connects the modular integrated busbar box and the transformer body, is used to provide a set value of support force for the modular integrated busbar box.

[0014] As a further optimization of this utility model, the near-end busbar box is provided with an operating hand hole, which is located directly above one end of the oil sleeve.

[0015] As a further optimization of this utility model, the remote busbar box is provided with a second operating handhole and a third operating handhole. The second operating handhole is located directly above the other end of the oil sleeve, and the third operating handhole is located directly above the valve. Both the second and the first operating handhole are provided with vent plugs.

[0016] As a further optimization of this utility model, the remote busbar box is provided with an oil drain area adjustment mechanism, which is located between the other end of the oil sleeve and the operating hand hole three.

[0017] The oil discharge area adjustment mechanism includes an expansion-type partition assembly connected to the inner wall of the remote bus box, a one-way air pump assembly connected to the outer wall of the remote bus box, and a reset assembly connected to the one-way air pump assembly. The reset assembly is connected to the expansion-type partition assembly through the one-way air pump assembly. The one-way air pump assembly is used to unidirectionally introduce gas into the expansion-type partition assembly, and the reset assembly is used to discharge the gas in the expansion-type partition assembly.

[0018] When the one-way gas pumping assembly introduces a set amount of gas into the expansion-type partition assembly, the expansion-type partition assembly is used to divide the space inside the remote bus box into an upper chamber and a lower chamber, and the operating manhole and valve are all connected to the lower chamber.

[0019] As a further optimization of this utility model, the expansion-type partition component includes an annular barrier plate fixedly connected to the inner wall of the remote busbar box, an annular cable threading cylinder fixedly connected to the inner annular surface of the annular barrier plate, an annular airbag connected to the inner annular surface of the annular cable threading cylinder, and a channel connected to the annular airbag. The channel passes through the annular cable threading cylinder, the annular barrier plate, and the remote busbar box in sequence, and the other end of the channel is connected to a one-way air pumping component.

[0020] As a further optimization of this utility model, the unidirectional air pumping assembly includes a telescopic air pumping assembly and a multi-directional air guiding assembly connected to the outer wall of the remote bus box. The telescopic air pumping assembly and the reset assembly are both connected to the expansion-type partition assembly through the multi-directional air guiding assembly.

[0021] As a further optimization of this utility model, the telescopic air pump assembly includes a fixed plate fixedly connected to the outer wall of the remote busbar box, an elastic telescopic rod connected to the fixed plate, a movable plate connected to the other end of the elastic telescopic rod, a corrugated pipe connected between the fixed plate and the movable plate, a slot I provided on the fixed plate, an air guide plate connected to the opening end of the slot I, several air holes I provided on the air guide plate, a plastic sealing sheet I connected to the end face of the air hole I located inside the slot I, a slot II and several air holes II provided on the movable plate, and a plastic sealing sheet II connected to the inner wall of the slot II. A sealed air pump chamber is formed between the fixed plate, the movable plate and the corrugated pipe. The plastic sealing sheet I covers several air holes I, and only one end of it is fixedly connected to the air guide plate. The plastic sealing sheet II covers several air holes II, and only one end of it is fixedly connected to the inner wall of the slot II.

[0022] As the internal space of the moving plate gradually decreases, positive pressure is generated inside the air chamber of the sealed pump, and air hole one and air hole two are in the open and closed states, respectively.

[0023] As the internal space of the moving plate gradually recovers, positive pressure is generated inside the sealed pump air chamber, and air hole one and air hole two are in the closed and open states, respectively.

[0024] As a further optimization of this utility model, the multi-channel air guide assembly includes an air guide pipe fixedly connected to the slot one and a tee connector connected to the outer wall of the remote bus box. One end of the air guide pipe is connected to the slot one, and the other end is connected to the channel one through the tee connector.

[0025] As a further optimization of this utility model, the reset assembly includes an exhaust pipe connected to a three-way connector, a stepped channel disposed inside the exhaust pipe, a spring and a stepped piston disposed inside the stepped channel, a pressure rod connected to the stepped piston, and a handle connected to the pressure rod. When the spring is shortened to a set length, the stepped channel is connected to channel one through the three-way connector.

[0026] The beneficial effects of this utility model are as follows: By horizontally placing the 220kV high-voltage oil bushing, this utility model can effectively solve the problems of high transformer size and weight. At the same time, since the internal leads do not cross the compartment, the clamping support of the insulation material at the internal lead connection point in the previous problem is eliminated. The special treatment of adding an insulation layer to the equalizing ball at the tail of the bushing eliminates the insulation cylinder at the tail of the internal bushing in the previous problem. By setting external conductive pipelines and valves, the oil injection and drainage of the transformer body and the overall busbar box are integrated. Moreover, during oil drainage maintenance, oil can be drained only in the maintenance area, which can effectively reduce the overall oil drainage volume and improve maintenance efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a view showing the interaction between the oil draining area adjustment mechanism and the remote busbar box of this utility model;

[0029] Figure 3 This is the utility model Figure 2 Enlarged view at point A in the middle;

[0030] Figure 4 This is the utility model Figure 2 Enlarged view at point B;

[0031] Figure 5 This is the utility model Figure 2 A magnified view at point C;

[0032] Figure 6 This is the utility model Figure 2 A magnified view at point D;

[0033] Figure 7 This is a schematic diagram of the external conductive integrated pipe of this utility model;

[0034] Figure 8 This is a comparative schematic diagram of the present invention and a transformer using a vertically mounted oil bushing.

[0035] In the diagram: 1. Near-end busbar box; 2. CT-end busbar box; 201. Flange; 3. Far-end busbar box; 4. Oil sleeve; 5. External conductive integrated conduit; 601. Manhole 1; 602. Manhole 2; 603. Manhole 3; 7. Vent plug; 8. Equalizing ball with added insulation layer; 9. Oil drain area adjustment mechanism; 91. Expansion-type partition assembly; 9101. Annular barrier plate; 9102. Annular cable conduit; 9103. Annular airbag; 9104. Channel 1; 92. One-way air pump assembly; 9201. Fixing plate; 9202. 9203. Moving plate; 9204. Corrugated pipe; 9205. Elastic telescopic rod; 9206. Slot 1; 9207. Air guide plate; 9208. Air hole 1; 9209. Plastic sealing sheet 1; 9210. Slot 2; 9211. Plastic sealing sheet 2; 9212. Air guide pipe; 9213. T-joint; 93. Reset assembly; 9301. Exhaust pipe; 9302. Stepped channel; 9303. Spring; 9304. Stepped piston; 9305. Pressure rod; 9306. Handle; 10. Valve; 11. Support frame. Detailed Implementation

[0036] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed merely to enable those skilled in the art to better understand and implement the subject matter described herein. Furthermore, features described in some examples may be combined in other examples.

[0037] Example 1

[0038] like Figure 1 and Figure 7 As shown, a horizontally positioned structure for the oil bushing of a large power transformer includes:

[0039] The modular integrated busbar box includes a near-end busbar box 1 connected to the transformer body, a CT end busbar box 2 connected to the other end of the near-end busbar box 1, a flange 201 connected to the other end of the CT end busbar box 2, and a far-end busbar box 3 connected to the flange 201. The near-end busbar box 1, the CT end busbar box 2, the flange 201 and the transformer body form an independent chamber one, and the flange 201 and the far-end busbar box 3 form an independent chamber two. A valve 10 is provided on the far-end busbar box 3 near the other end.

[0040] The oil-oil bushing 4 is horizontally connected to the middle of the flange 201. One end of the oil-oil bushing 4 is in an independent chamber 1, and the other end is in an independent chamber 2. Both ends of the oil-oil bushing 4 are equipped with an equalizing ball and an additional insulating layer 8. The equalizing ball at the tail end and the equalizing ball at the top end of the oil-oil bushing 4 are only treated with an additional insulating layer, so as to ensure that the equalizing ball of the high-voltage bushing has sufficient electrical distance margin to the ground potential during power frequency and impact tests.

[0041] External conductive integrated pipe 5 is located outside the spliced ​​integrated bus box and is used to connect independent chamber one and independent chamber two; thereby realizing integrated oil injection and drainage of the transformer body and the spliced ​​integrated bus box.

[0042] Support frame 11 is connected between the modular integrated busbar box and the transformer body, and is used to provide a set value of support force for the modular integrated busbar box.

[0043] It should be noted that, as Figure 8As shown, compared with the traditional vertical oil bushing 4 transformer, this utility model optimizes the traditional structure by eliminating the insulating paper tube of the live part at the end of the protective bushing, the connecting lead inside the busbar box, and the insulating components used to clamp and fix the connecting lead. Due to the presence of the insulating paper tube of the live part at the end of the protective bushing, the connecting lead inside the busbar box, and the insulating components used to clamp and fix the connecting lead, the left and right compartments cannot be independent, and oil filling and draining cannot be integrated with the transformer, which is inconvenient for transformer installation and maintenance. Moreover, the overall weight and height of the transformer and the height of the oil conservator of this utility model are greatly reduced. At the same time, due to the reduction in the height of the spliced ​​integrated busbar box, the support frame 11 is more stable, achieving material saving and consumption reduction.

[0044] In an optional embodiment of this utility model, such as Figure 1 As shown, the near-end busbar box 1 is provided with an operating hand hole 601, which is located directly above one end of the oil sleeve 4.

[0045] In an optional embodiment of this utility model, as shown in the figure, the remote busbar box 3 is provided with a second operating port 602 and a third operating port 603. The second operating port 602 is located directly above the other end of the oil sleeve 4, and the third operating port 603 is located directly above the valve 10. Both the second operating port 602 and the first operating port 601 are provided with vent plugs 7.

[0046] It should be noted that the operation handhole 1 601, operation handhole 2 602 and operation handhole 3 603 are set up to realize internal wiring and to be used when inspecting components in a local area, and the vent plug 7 is used to release air when injecting transformer oil.

[0047] Example 2

[0048] Based on the above embodiment 1, as follows Figures 2-6 As shown, the remote busbar box 3 is equipped with an oil drain area adjustment mechanism 9, which is located between the other end of the oil sleeve 4 and the operating hand hole 603.

[0049] The oil draining zone adjustment mechanism 9 includes an expansion-type partition assembly 91 connected to the inner wall of the remote bus box 3, a one-way air pump assembly 92 connected to the outer wall of the remote bus box 3, and a reset assembly 93 connected to the one-way air pump assembly 92. The reset assembly 93 is connected to the expansion-type partition assembly 91 through the one-way air pump assembly 92. The one-way air pump assembly 92 is used to unidirectionally introduce gas into the expansion-type partition assembly 91, and the reset assembly 93 is used to discharge the gas in the expansion-type partition assembly 91.

[0050] When the one-way gas pumping assembly 92 introduces a set amount of gas into the expansion-type partition assembly 91, the expansion-type partition assembly 91 is used to divide the space in the remote bus box 3 into an upper chamber and a lower chamber. The operating manhole 3 603 and the valve 10 are both connected to the lower chamber.

[0051] It should be noted that when maintenance is only required through operating manhole 1 601 and operating manhole 2 602, the amount of transformer oil drained should be controlled so that the oil level is below the set distance below the oil bushing 4. When maintenance is only required through operating manhole 3 603, a set amount of gas can be introduced into the expansion-type partition component 91 through the one-way air pump component 92, causing the expansion-type partition component 91 to expand and deform. After expansion and deformation, the expansion-type partition component 91 can achieve all-round sealing, thereby dividing the space inside the remote busbar box 3 into an upper chamber and a lower chamber. The other end of the oil bushing 4 is located in the upper chamber, while the operating manhole 3 603 is located in the lower chamber. At this time, only the transformer oil in the lower chamber can be drained, thereby achieving the oil draining treatment of the set area, reducing the amount of oil drained, and effectively improving maintenance efficiency. When the expansion-type partition component 91 does not divide the space inside the remote busbar box 3, the expansion-type partition component 91 does not affect normal oil injection and drainage.

[0052] In an optional embodiment of this utility model, such as Figure 3 As shown, the expansion-type partition assembly 91 includes an annular baffle plate 9101 fixedly connected to the inner wall of the remote busbar box 3, an annular cable tube 9102 fixedly connected to the inner annular surface of the annular baffle plate 9101, an annular airbag 9103 connected to the inner annular surface of the annular cable tube 9102, and a channel 9104 connected to the annular airbag 9103. The channel 9104 passes through the annular cable tube 9102, the annular baffle plate 9101 and the remote busbar box 3 in sequence. The other end of the channel 9104 is connected to the one-way air pump assembly 92.

[0053] It should be noted that, as mentioned above, when the one-way air pump assembly 92 introduces gas into the expansion-type separation assembly 91, specifically, the gas flows through channel 1 9104 and enters the annular air bladder 9103. When the amount of gas entering the annular air bladder 9103 reaches a set amount, it can drive the annular air bladder 9103 to expand to a set state, thereby filling the central perforated area of ​​the annular wire threading tube 9102. Moreover, the expanded annular air bladder 9103 can overcome the pressure exerted by the transformer oil in the upper chamber of the far-end busbar box 3. At this time, the entire upper chamber and lower chamber are in a stable separation state.

[0054] In an optional embodiment of this utility model, such as Figures 4-5As shown, the unidirectional air pumping assembly 92 includes a telescopic air pumping assembly and a multi-directional air pumping assembly connected to the outer wall of the remote bus box 3. Both the telescopic air pumping assembly and the reset assembly 93 are connected to the expansion-type partition assembly 91 through the multi-directional air pumping assembly.

[0055] The telescopic air pump assembly includes a fixed plate 9201 fixedly connected to the outer wall of the remote busbar box 3, an elastic telescopic rod 9204 connected to the fixed plate 9201, a movable plate 9202 connected to the other end of the elastic telescopic rod 9204, a corrugated pipe 9203 connected between the fixed plate 9201 and the movable plate 9202, a slot 9205 provided on the fixed plate 9201, an air guide plate 9206 connected to the opening end of the slot 9205, a plurality of air holes 9207 provided on the air guide plate 9206, and air holes 9207 connected to the slots 9205 located inside the slots 9205. A plastic sealing sheet 9208 on the end face, a slot 9209 and several air holes 9210 on the moving plate 9202, and a plastic sealing sheet 9211 connected to the inner wall of the slot 9209 form a sealed pump air chamber between the fixed plate 9201, the moving plate 9202 and the bellows 9203. The plastic sealing sheet 9208 covers several air holes 9207 and is fixedly connected to the air guide plate 9206 at only one end. The plastic sealing sheet 9211 covers several air holes 9210 and is fixedly connected to the inner wall of the slot 9209 at only one end.

[0056] As the internal space of the moving plate 9202 gradually decreases, positive pressure is generated inside the sealed pump air chamber, and air hole 9207 and air hole 9210 are in the open and closed states, respectively.

[0057] As the internal space of the moving plate 9202 gradually recovers, positive pressure is generated inside the sealed pump air chamber, and air hole 1 9207 and air hole 2 9210 are in the closed and open states, respectively.

[0058] The multi-channel air guide assembly includes an air guide pipe 9212 fixedly connected to the slot 9205 and a tee connector 9213 connected to the outer wall of the remote bus box 3. One end of the air guide pipe 9212 is connected to the slot 9205, and the other end is connected to the channel 9104 through the tee connector 9213.

[0059] It should be noted that, as described above, when gas is pumped into the expansion-type separator assembly 91 through the one-way pumping assembly 92, the movable plate 9202 is manually pressed. Under pressure, the movable plate 9202 moves towards the fixed plate 9201, squeezing the elastic telescopic rod 9204 and the bellows 9203. The sealed pumping chamber formed between the fixed plate 9201, the movable plate 9202, and the bellows 9203 is compressed, its internal space decreases, and positive pressure is generated. This positive pressure applies pressure to the first plastic sealing sheet 9208 and the second plastic sealing sheet 9211, respectively. Because the plastic sealing sheet 9211 is located within the slot 9209, under pressure, it can tightly cover several air holes 9210, thereby isolating the internal space of the sealing pump's air chamber from the external space. Meanwhile, the plastic sealing sheet 9208 bends and deforms towards the inside of the slot 9205 under this pressure, allowing the gas in the sealing pump's air chamber to be pressurized and transported to the air guide pipe 9212. After flowing through the air guide pipe 9212 and the three-way connector 9213, it enters the channel 9104 and finally enters the annular airbag 9103. When the elastic telescopic rod 9204 is compressed to its limit, it pulls the moving plate 9202 in the opposite direction, causing the moving plate 9202 to move away from the fixed plate 9201. At this time, the air chamber of the sealed pump begins to recover from its minimum state to its maximum state. During this process, a negative pressure is generated inside the air chamber of the sealed pump. This negative pressure acts on the first plastic sealing sheet 9208 and the second plastic sealing sheet 9211, causing the first plastic sealing sheet 9208 to fit tightly against the air guide plate 9206 and block several air holes 9207. At this time, the slot 9205 and the air guide pipe 9212... The gas inside the three-way connector 9213, channel one 9104, and annular airbag 9103 cannot flow back into the sealing pump air chamber. Meanwhile, the plastic sealing sheet two 9211 bends towards the inside of the sealing pump air chamber under negative pressure, thereby allowing external gas to be pumped into the sealing pump air chamber. This cycle repeats, continuously pumping external gas into the annular airbag 9103 until the air pressure inside the annular airbag 9103 reaches the set value. Normally, the air pressure inside the annular airbag 9103 reaches the set value when the movable plate 9202 can no longer be pressed manually.

[0060] In an optional embodiment of this utility model, such as Figures 5-6 As shown, the reset assembly 93 includes an exhaust pipe 9301 connected to a three-way connector 9213, a stepped channel 9302 disposed inside the exhaust pipe 9301, a spring 9303 and a stepped piston 9304 disposed inside the stepped channel 9302, a pressure rod 9305 connected to the stepped piston 9304, and a handle 9306 connected to the pressure rod 9305. When the spring 9303 is shortened to a set length, the stepped channel 9302 is connected to the channel 9104 through the three-way connector 9213.

[0061] It should be noted that after maintenance and refilling of the lower chamber with oil to the set amount, the annular airbag 9103 can be restored to its initial state. At this time, simply press the handle 9306 to move the lever 9305 toward the three-way connector 9213. When the lever 9305 moves, it pushes the stepped piston 9304 to move in the same direction and distance. When the stepped piston 9304 moves, it begins to compress the spring 9303. When the spring 9303 is compressed to its shortest state, the stepped channel 9302 and the three-way connector 9213 are connected and are no longer blocked by the stepped piston 9304. This allows the gas inside the annular airbag 9103 to flow sequentially through the channel 9104, the three-way connector 9213, and the stepped channel 9302, and finally be discharged to the outside, thereby realizing the reset of the annular airbag 9103 and the re-fusion of the upper and lower chambers into a whole.

[0062] The above description of this embodiment is not limited to the specific implementation described above. The specific implementation described above is merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this embodiment, all of which are within the protection scope of this embodiment.

Claims

1. A horizontally positioned structure for the oil bushing of a large power transformer, characterized in that, include: A modular integrated busbar box, comprising a near-end busbar box (1) connected to the transformer body, a CT end busbar box (2) connected to the other end of the near-end busbar box (1), a flange (201) connected to the other end of the CT end busbar box (2), and a far-end busbar box (3) connected to the flange (201). The near-end busbar box (1), the CT end busbar box (2), the flange (201) and the transformer body form an independent chamber one. The flange (201) and the far-end busbar box (3) form an independent chamber two. A valve (10) is provided on the far-end busbar box (3) near the other end. Oil sleeve (4), the oil sleeve (4) is horizontally connected to the middle of the flange (201), one end of which is in independent chamber one and the other end of which is in independent chamber two, and both ends of the oil sleeve (4) are provided with equalizing ball insulation layer (8). An external conductive integrated pipe (5) is located outside the spliced ​​integrated busbar box, and the external conductive integrated pipe (5) is used to connect independent chamber one and independent chamber two. A support frame (11) is connected between the modular integrated busbar box and the transformer body, and is used to provide a set value of support force for the modular integrated busbar box.

2. The horizontally arranged structure for oil bushings of large power transformers according to claim 1, characterized in that, The near-end busbar box (1) is provided with an operating hand hole (601), which is located directly above one end of the oil sleeve (4).

3. A horizontally positioned structure for oil bushings of large power transformers according to claim 2, characterized in that, The remote busbar box (3) is provided with a second operating manhole (602) and a third operating manhole (603). The second operating manhole (602) is located directly above the other end of the oil sleeve (4), and the third operating manhole (603) is located directly above the valve (10). Both the second operating manhole (602) and the first operating manhole (601) are provided with vent plugs (7).

4. A horizontally positioned structure for oil bushings of large power transformers according to claim 3, characterized in that, The remote busbar box (3) is provided with an oil drain area adjustment mechanism (9), which is located between the other end of the oil sleeve (4) and the operating hand hole three (603). The oil discharge area adjustment mechanism (9) includes an expansion-type partition assembly (91) connected to the inner wall of the remote bus box (3), a one-way air pump assembly (92) connected to the outer wall of the remote bus box (3), and a reset assembly (93) connected to the one-way air pump assembly (92). The reset assembly (93) is connected to the expansion-type partition assembly (91) through the one-way air pump assembly (92). The one-way air pump assembly (92) is used to unidirectionally introduce gas into the expansion-type partition assembly (91), and the reset assembly (93) is used to discharge the gas in the expansion-type partition assembly (91). When the one-way gas pump assembly (92) introduces a set amount of gas into the expansion separator assembly (91), the expansion separator assembly (91) is used to divide the space in the remote bus box (3) into an upper chamber and a lower chamber. The operating manhole three (603) and the valve (10) are both connected to the lower chamber.

5. A horizontally positioned structure for oil bushings of large power transformers according to claim 4, characterized in that, The expansion-type partition assembly (91) includes an annular baffle plate (9101) fixedly connected to the inner wall of the remote busbar box (3), an annular threading tube (9102) fixedly connected to the inner annular surface of the annular baffle plate (9101), an annular airbag (9103) connected to the inner annular surface of the annular threading tube (9102), and a channel (9104) connected to the annular airbag (9103). The channel (9104) passes through the annular threading tube (9102), the annular baffle plate (9101), and the remote busbar box (3) in sequence. The other end of the channel (9104) is connected to the one-way air pump assembly (92).

6. A horizontally positioned structure for oil bushings of large power transformers according to claim 5, characterized in that, The unidirectional air pump assembly (92) includes a telescopic air pump assembly and a multi-directional air pump assembly connected to the outer wall of the remote bus box (3). The telescopic air pump assembly and the reset assembly (93) are both connected to the expansion separation assembly (91) through the multi-directional air pump assembly.

7. A horizontally positioned structure for oil bushings of large power transformers according to claim 6, characterized in that, The telescopic air pump assembly includes a fixed plate (9201) fixedly connected to the outer wall of the remote busbar box (3), an elastic telescopic rod (9204) connected to the fixed plate (9201), a movable plate (9202) connected to the other end of the elastic telescopic rod (9204), a corrugated pipe (9203) connected between the fixed plate (9201) and the movable plate (9202), a slot (9205) provided on the fixed plate (9201), an air guide plate (9206) connected to the opening end of the slot (9205), a plurality of air holes (9207) provided on the air guide plate (9206), and air holes (9207) connected to the slots (9205) inside the slots (9205). The plastic sealing sheet 1 (9208) on the end face, the slot 2 (9209) and several air holes 2 (9210) provided on the moving plate (9202), and the plastic sealing sheet 2 (9211) connected to the inner wall of the slot 2 (9209), a sealed pump air chamber is formed between the fixed plate (9201), the moving plate (9202) and the bellows (9203), the plastic sealing sheet 1 (9208) covers several air holes 1 (9207), and only one end of it is fixedly connected to the air guide plate (9206), the plastic sealing sheet 2 (9211) covers several air holes 2 (9210), and only one end of it is fixedly connected to the inner wall of the slot 2 (9209); As the internal space of the moving plate (9202) gradually decreases, positive pressure is generated inside the sealed pump air chamber, and air hole one (9207) and air hole two (9210) are in the open and closed states respectively. As the internal space of the moving plate (9202) gradually recovers, positive pressure is generated inside the sealed pump air chamber, and air hole one (9207) and air hole two (9210) are in the closed state and the open state, respectively.

8. A horizontally positioned structure for oil bushings of large power transformers according to claim 7, characterized in that, The multi-directional air guide assembly includes an air guide pipe (9212) fixedly connected to the slot one (9205) and a tee connector (9213) connected to the outer wall of the remote bus box (3). One end of the air guide pipe (9212) is connected to the slot one (9205), and the other end is connected to the channel one (9104) through the tee connector (9213).

9. A horizontally positioned structure for oil bushings of large power transformers according to claim 8, characterized in that, The reset assembly (93) includes an exhaust pipe (9301) connected to a three-way connector (9213), a stepped channel (9302) located inside the exhaust pipe (9301), a spring (9303) and a stepped piston (9304) located inside the stepped channel (9302), a pressure rod (9305) connected to the stepped piston (9304), and a handle (9306) connected to the pressure rod (9305). When the spring (9303) is shortened to a set length, the stepped channel (9302) is connected to channel one (9104) through the three-way connector (9213).

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