Corrugated internal oil type oil conservator

Abstract

The utility model belongs to the technical field of transformers, and discloses a corrugated internal oil type oil conservator, which is characterized in that an oil level digital display screen and a pair of conservator bases are arranged at the bottom of an oil conservator shell, junction boxes are arranged on the conservator bases, and a plurality of corrugated pipes are uniformly arranged side by side in the length direction inside the oil conservator shell; the distance sensor is installed on the outer side of one corrugated pipe core body, a top pull wire matched with the distance sensor is fixed to the upper portion of an upper cover plate of the corrugated pipe core body, and the junction box is electrically connected with the distance sensor and the oil level digital display screen. A plurality of limiting mechanisms are arranged above each corrugated pipe core body upper cover plate; the pressure relief valve is installed above an upper cover plate of one corrugated pipe core body, one end of the pressure relief valve is communicated with the interior of the corrugated pipe core body, the other end of the pressure relief valve is communicated with one end of the pressure relief pipe, and the other end of the pressure relief pipe penetrates through the oil conservator shell to be led to the lower portion. According to the utility model, the oil level reading is convenient to observe, the corrugated pipe core body is prevented from being damaged, and the overpressure condition can be effectively controlled.

Description

TECHNICAL FIELD

[0001] The utility model discloses a corrugated inner oil type oil conservator satisfying expansion limit self -locking and having pressure -relief function belongs to transformer technical field. BACKGROUND

[0002] The oil conservator is located at the upper portion of the transformer oil tank and is also called an oil pillow, and the oil conservator is a container communicated with the transformer oil tank and arranged to adapt to the volume change of the transformer oil in the oil tank. The corrugated oil conservator, as a substitute product of the capsule type oil conservator, is widely applied to oil-immersed power transformers of various voltage grades and can realize compensation requirements of oil volume change caused by environmental change.

[0003] The existing corrugated inner oil type oil conservator is located at the upper portion of the transformer when normally operating, and it is not conducive to observing the oil level reading when operating and maintaining at night. There is no expansion limit measure, and there is a risk of over-limit expansion of the corrugated tube core caused by site operation errors, which may damage the corrugated tube core. No pressure relief mechanism is arranged to control the overpressure condition, and the corrugated tube core may be damaged and oil may be leaked if misoperation occurs.

[0004] With the increasingly strict requirements of power system operation and maintenance, more stringent requirements are put forward for the technology of the oil conservator. Not only the oil compensation amount requirement is satisfied, but also the intelligent and digital configuration is further realized. In order to meet the requirements of power operation and maintenance on the oil conservator, a new corrugated inner oil type oil conservator satisfying expansion limit self -locking, over-limit pressure relief and realizing data acquisition and conversion function is urgently needed to be developed. SUMMARY

[0005] In order to solve the above technical problems, the utility model discloses a new type of corrugated inner oil type oil conservator, and the technical scheme adopted by the utility model is:

[0006] A corrugated inner oil type oil conservator, comprising an oil conservator shell of a cuboid structure, a corrugated tube located in the oil conservator shell, the corrugated tube comprising a corrugated tube core, the corrugated tube core being sealed by welding upper and lower cover plates, a bottom of the oil conservator shell being provided with an oil level digital display screen and a pair of cabinet bases, a junction box being mounted on the cabinet bases, a plurality of corrugated tubes being mounted in parallel and uniformly distributed inside the length direction of the oil conservator shell, a distance sensor being mounted outside one of the corrugated tube cores, a top pull wire matched with the distance sensor being fixed above the upper cover plate corresponding to the corrugated tube core, the junction box being electrically connected with the distance sensor and the oil level digital display screen, a plurality of limiting mechanisms being arranged above the upper cover plate corresponding to each corrugated tube core, a pressure release valve being mounted above the upper cover plate corresponding to one of the corrugated tube cores, one end of the pressure release valve being communicated with the inside of the corrugated tube core, the other end of the pressure release valve being communicated with one end of a pressure relief pipe, the other end of the pressure relief pipe penetrating through the oil conservator shell and being fixed below the oil conservator shell.

[0007] Preferably, the pressure relief pipe comprises a corrugated hose and a steel pipe, the main body of the pressure relief pipe adopts the steel pipe, and the upper end of the main body of the pressure relief pipe adopts the corrugated hose.

[0008] Preferably, the top ends of the plurality of corrugated pipe cores are connected through exhaust connecting pipes, the exhaust connecting pipes comprise exhaust steel pipes and exhaust hoses, the exhaust steel pipes are connected with the interiors of the corrugated pipe cores through connecting pieces, the adjacent exhaust steel pipes are connected through the exhaust hoses, a branch pipe joint is led out on one of the exhaust steel pipes, the top end of the exhaust pipe is sealingly connected with the branch pipe joint, and the bottom end of the exhaust pipe penetrates through the bottom of the oil tank shell and is fixed below the oil tank shell.

[0009] Preferably, an exhaust valve is installed at the bottom end of the exhaust pipe, and the exhaust valve is in a normally closed state.

[0010] Preferably, the main connecting pipe is fixedly installed below the bottom of the oil tank shell, the main connecting pipe is sealingly connected with the interiors of the plurality of corrugated pipe cores, one end of the oil injection pipe is sealingly connected with the main connecting pipe, and an oil injection valve is installed at the other end of the oil injection pipe.

[0011] Preferably, a high-low oil level alarm device is fixedly installed in the interior of the oil tank shell, the high-low oil level alarm device comprises oil level alarm rods and travel switches, the lower ends of the oil level alarm rods are fixedly installed at the clearances between adjacent corrugated pipe cores, installation holes are formed in the upper parts and the lower parts of the oil level alarm rods, the travel switches are installed in the installation holes, the travel switches comprise travel switch bodies and alarm trigger rods, the alarm trigger rods of the upper travel switches are installed above the upper cover plates, the alarm trigger rods of the lower travel switches are installed in the clearances between adjacent corrugated pipes, and the travel switch bodies are electrically connected with the junction boxes.

[0012] Preferably, a rubber pad is fixedly installed on the upper surface of the limiting mechanism.

[0013] Preferably, an oil level indicating observation window in the vertical direction is formed in the side surface of the oil tank shell, the oil level indicating observation window is blocked by a plate made of transparent material, the outer surfaces of the oil tank shell on the two sides of the oil level indicating observation window are respectively provided with an ambient temperature scale mark and an oil level scale mark, and an oil level warning mechanism is arranged on the outer surface of the corrugated pipe core corresponding to the oil level indicating observation window.

[0014] Preferably, a grounding wire connecting seat is fixedly arranged on the cabinet base, and the grounding wire connecting seat is connected with the transformer body.

[0015] Preferably, a plurality of reinforcing ribs are arranged on the top of the oil tank shell in the length direction, the two ends of the oil tank shell in the length direction are circular arc structures matched with the corrugated pipe cores, steel fixing connecting plates are arranged between the plurality of corrugated pipe cores, and the two ends of the steel fixing connecting plates are fixedly installed above the upper cover plates corresponding to the adjacent corrugated pipe cores.

[0016] The beneficial effects of this utility model are:

[0017] This utility model facilitates the observation of oil level readings by setting up a digital oil level display screen; avoids damage to the bellows core by setting up a limit mechanism; and effectively controls overpressure by setting up a pressure relief valve, ensuring the safe operation of the oil conservator and enabling the oil conservator product to better meet the State Grid's requirements for smart substations. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of the corrugated internal oil storage tank according to an embodiment of the present utility model;

[0020] Figure 2 This is a left view of a corrugated internal oil storage tank according to an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the main connecting pipe in an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the cabinet base from the left view of an embodiment of the present invention;

[0023] In the diagram, 1. Oil tank outer shell, 2. Tank base, 3. Corrugated pipe core, 4. Main connecting pipe, 5. Exhaust pipe, 6. Oil injection pipe, 7. Pressure relief pipe, 8. Pressure relief valve, 9. Limiting mechanism, 10. Exhaust steel pipe, 11. Exhaust hose, 12. Reinforcing rib, 13. Oil level indicator observation window, 14. Oil level digital display screen, 15. High and low oil level alarm device, 16. Oil level warning mechanism, 17. Grounding wire connector. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings.

[0025] like Figures 1-4 ( Figure 1As shown in the partial perspective view, a corrugated inner oil type oil conservator comprises a cuboid structure oil conservator shell 1, a plurality of corrugated pipes are fixedly installed in parallel in the length direction of the inside of the oil conservator shell 1, the corrugated pipe comprises a corrugated pipe core body 3, the corrugated pipe core body 3 is sealed by upper and lower cover plates through welding, the corrugated pipe core body 3 stores transformer oil, and the corrugated pipe core body 3 is guaranteed to be oil-tight. A company nameplate is installed on the front side of the length direction of the oil conservator shell 1, a pair of cabinet bases 2 are fixedly installed on the bottom outer side of the oil conservator shell 1, and the oil conservator shell 1 is fixedly installed above a transformer oil tank through bolts and the cabinet bases 2. A plurality of reinforcing ribs 12 are arranged on the top of the length direction of the oil conservator shell 1 through welding. The embodiment of the utility model sets two parallel and symmetrical reinforcing ribs 12 on the top outer side of the oil conservator shell 1, enhances the anti-deformation capacity of the top of the oil conservator shell 1, and the reinforcing rib 12 can adopt a 14# channel steel.

[0026] In order to better adapt to the installation requirements of the corrugated pipe core body 3, the length direction of the oil conservator shell 1 can be processed into a circular arc structure matched with the corrugated pipe core body 3. A plurality of fixed connecting plates of steel material are installed between the corrugated pipe core bodies 3, the two ends of the fixed connecting plate can be fixedly installed above the upper cover plates of the adjacent corrugated pipe core bodies 3 through bolts, the fixed connecting plate can make the corrugated pipe core bodies 3 form a whole to realize synchronous expansion and contraction, and the expansion and contraction of the corrugated pipe core bodies 3 is guaranteed to be consistent. The lower surface of the lower cover plate corresponding to the corrugated pipe core body 3 is welded with a stud, the corrugated pipe is fixedly installed at the lower part of the oil conservator shell 1 through the stud and a nut. A main connecting pipe 4 is fixedly installed below the bottom outer side of the oil conservator shell 1, an oil injection opening is formed in the center position of the lower cover plate corresponding to the corrugated pipe core body 3, and studs are welded around the oil injection opening. The main connecting pipe 4 is in sealed communication with the inside of the plurality of corrugated pipe core bodies 3 through a connecting flange, a sealing element, studs and nuts, the plurality of corrugated pipe core bodies 3 are communicated with each other through the arrangement of the main connecting pipe 4, the oil level of the transformer oil in the plurality of corrugated pipe core bodies 3 is guaranteed to be consistent at all times, and the plurality of corrugated pipe core bodies 3 can be synchronously injected with oil. One end of an oil injection pipe 6 is communicated with the main connecting pipe 4, the other end of the oil injection pipe 6 is installed with an oil injection valve, and the transformer oil is injected into the corrugated pipe core body 3 by opening the oil valve to communicate with an oil injection machine. The lower part of the main connecting pipe 4 is communicated with a transformer oil tank through a connecting piece, the volume change of the transformer oil in the oil tank is adjusted by the transformer oil in the corrugated pipe core body 3, the main connecting pipe 4 plays a role of a main pipeline for breathing of an oil system due to thermal expansion and contraction, when the oil system is expanded due to heat, the transformer oil flows into the inside of the corrugated pipe core body 3, and when the oil system is contracted due to cold, the transformer oil flows back from the corrugated pipe core body 3 to the transformer oil tank.

[0027] A pressure relief valve 8 is arranged on the top of one of the bellows cores 3. The pressure relief valve 8 is fixedly arranged on the outer surface of the corresponding upper cover plate of the bellows core 3 by bolts. One end of the pressure relief valve 8 is in communication with the inside of the bellows core 3, and the other end of the pressure relief valve 8 is in communication with one end of a pressure relief pipe 7. The other end of the pressure relief pipe 7 penetrates the oil conservator shell 1 and is fixed below the oil conservator shell 1. The pressure relief pipe 7 can adopt the structure of a corrugated hose and a steel pipe. The main body of the pressure relief pipe 7 adopts a DN25 steel pipe. A corrugated hose is arranged on the upper part of the main body of the pressure relief pipe 7 and is in abutment with the pressure relief valve 8. Because the pressure relief valve 8 moves up and down with the bellows core 3, the corrugated hose facilitates the movement of the pressure relief valve 8 and is not easy to be damaged. The pressure relief valve 8 can adopt a mechanical structure with a spring. When the oil pressure in the bellows core 3 reaches a limited threshold (for example, 55 kPa) of the pressure relief valve, the spring of the pressure relief valve 8 automatically opens the pressure relief channel. The transformer oil or gas is automatically relieved through the pressure relief pipe 7. The oil is discharged for pressure relief during oil injection, and the gas is discharged for pressure relief during pressure test.

[0028] The top ends of the plurality of bellows cores 3 are communicated through an exhaust connecting pipe. The exhaust connecting pipe includes exhaust steel pipes 10 and exhaust hoses 11. The exhaust steel pipes 10 are in communication with the inside of the bellows core 3 through connecting pieces. The adjacent exhaust steel pipes 10 are communicated through the exhaust hoses 11. The exhaust hoses 11 can adopt corrugated pipes with steel wire sleeves. The bellows cores 3 can have running errors when they are operated for a long time. The exhaust hoses 11 are soft and easy to bend, so as to avoid damaging the exhaust connecting pipe when the bellows cores 3 have running errors. A branch pipe joint is arranged on the first segment of the exhaust steel pipe 10 at the left end. The top end of the exhaust pipe 5 made of a steel material is in sealed communication with the branch pipe joint. The bottom end of the exhaust pipe 5 penetrates the bottom of the oil conservator shell 1 and is fixed below the oil conservator shell 1. An exhaust valve that can be opened or closed is arranged on the bottom end of the exhaust pipe 5. The exhaust valve of the exhaust pipe 5 is in a normally closed state. The exhaust valve can be opened only during the oil injection stage. After the exhaust valve is opened, the inside of the bellows core 3 is communicated with the outside atmosphere through the exhaust pipe 5. The exhaust pipe 5 serves as an inner cavity exhaust pipeline of the bellows core 3, realizes the exhaust function of the bellows core 3 during the oil injection process, and ensures that there is no air accumulation in the bellows core 3 after the oil injection is completed.

[0029] A pair of limiting mechanisms 9 spaced apart by a certain distance are fixedly arranged on the upper surface of the corresponding upper cover plate of each bellows core 3 by welding. Rubber pads are fixedly arranged on the upper surface of the limiting mechanisms 9 by adhesion. The rubber pads are arranged to avoid scratching the inner surface of the oil conservator shell 1 by the limiting mechanisms 9.

[0030] The left side of the oil tank shell 1 is provided with a vertical oil level indicating observation window 13, which is blocked by a plate made of transparent material, facilitating observation of the oil level while preventing dust. The outer surface of the oil tank shell 1 on the left side of the oil level indicating observation window 13 is provided with an ambient temperature scale mark, and the outer surface of the oil tank shell 1 on the right side of the oil level indicating observation window 13 is provided with an oil level scale mark, facilitating observation of the oil level according to the current ambient temperature. An oil level warning mechanism 16 is provided on the outer surface of the corrugated tube core 3 on the left side corresponding to the position of the oil level indicating observation window 13. The oil level warning mechanism 16 is L-shaped and fixedly installed on the side upper part of the corrugated tube core 3 on the left side near the oil level indicating observation window 13. The oil level warning mechanism 16 can be a steel plate with a red mark on the outer surface. The red mark is designed as a red thick line with a width of about 5 cm, which makes the oil level indication of the oil level warning mechanism 16 more eye-catching.

[0031] A high and low oil level alarm device 15 is fixedly installed inside the oil tank shell 1. The high and low oil level alarm device 15 includes an oil level alarm rod and a travel switch. The oil level alarm rod is fixedly installed in the gap between adjacent corrugated tube cores 3, and the lower end of the oil level alarm rod is fixedly installed on the bottom of the oil tank shell 1 by bolts or welding. The upper and lower parts of the oil level alarm rod are provided with mounting holes, and the travel switch is fixedly installed in the mounting holes by bolts. The travel switch includes an alarm trigger rod. The upper alarm trigger rod corresponds to the fixed connecting plate on the top of the corrugated tube core 3, and the lower alarm trigger rod is installed in the gap between two adjacent corrugations. The travel switch is electrically connected to a junction box on the cabinet base 2, which is connected to an alarm device at a remote back-end through a wired connection. When the corrugated tube core 3 runs upward, the fixed connecting plate touches the upper alarm trigger rod, and the travel switch sends a high oil level electrical signal to the alarm device through the junction box, triggering a high oil level alarm (high oil level reaching 95%). When the corrugated tube core 3 runs downward, the corrugation touches the lower alarm trigger rod, and the travel switch sends a low oil level electrical signal to the alarm device through the junction box, triggering a low oil level alarm (low oil level reaching 5%).

[0032] An oil level digital display screen 14 is fixedly installed on the lower left end of the oil tank shell 1. The oil level digital display screen 14 is electrically connected to the junction box installed on the cabinet base 2. The junction box is a collection mechanism for all signals inside the oil tank, including high and low oil level signals, 4-20mA signals, etc. The oil level digital display screen 14 receives the 4-20mA signal output by the distance sensor inside the oil tank, and digitally converts the 4-20mA signal to finally display the numerical value of the oil level. This design solves the technical defect that the oil level is not easy to observe in the existing corrugated oil tank.

[0033] The distance sensor is fixed beside one of the corrugated tube cores 3, the top pull wire matched with the distance sensor is fixed on the upper cover plate at the top end of the corrugated tube core 3, the distance sensor is electrically connected with the junction box, the distance sensor monitors the up-down movement of the corrugated tube core 3 in cooperation with the top pull wire, and converts the movement distance signal into a 4-20mA signal and transmits to the junction box on the cabinet base 2, and finally is displayed on the screen through the oil level digital display screen 14.

[0034] The cabinet base 2 is a reverse trapezoidal structure formed by welding 14# channel steel, and a through hole (not shown in the figure) for pipeline passing through is formed on the cabinet base 2. Figure 3 The reverse trapezoidal structure can make the oil storage cabinet shell 1 more stable, and the grounding wire connecting seat 17 is arranged on the lower outer surface of the cabinet base 2 by welding, and the grounding wire connecting seat 17 is connected with the transformer body through a connecting wire, and the transformer requires that all component connections are connected with the grounding wire to achieve equipotential.

[0035] The working principle of the corrugated inner oil type oil storage cabinet provided in the embodiment of the utility model is as follows:

[0036] The up-down synchronous expansion of the plurality of corrugated tube cores 3 can adapt to the volume change of the transformer oil in the oil tank, when the corrugated tube core 3 expands beyond the high oil level and reaches the height limit, the limiting mechanism 9 abuts against the top inner surface of the oil storage cabinet shell 1, and the limiting mechanism 9 can limit the further expansion of the corrugated tube core 3 to cause damage.

[0037] Through the cooperation of the oil level indication observation window 13 and the oil level warning mechanism 16, the oil level change in the corrugated tube core 3 can be conveniently and intuitively observed. The environmental temperature scale mark is provided with several typical temperature points such as-10℃, +20℃ and +40℃, and the oil level scale mark is provided with several typical oil level points such as lower limit (0), upper limit (100%), 20%, 40%, 60% and 80%, and the oil level is closely related to the environmental temperature, when the environmental temperature is-10℃, the best height of the oil level is slightly lower than the 20% scale, when the environmental temperature is +20℃, the best height of the oil level is slightly higher than the 40% scale, and when the environmental temperature is +40℃, the best height of the oil level is slightly lower than the 60% scale.

[0038] The pressure relief pipe 7 and the pressure release valve 8 are communicated as a directional pressure relief pipeline, and when the internal pressure of the corrugated tube core 3 exceeds the set pressure value, directional oil discharge pressure relief is performed. The pressure relief pipe 7 and the pressure release valve 8 are mainly set to play a fault tolerance function, because the internal structure principle may not be clear, the on-site staff may make wrong operation when filling oil or pressure test, which may cause the oil filling amount to exceed 100% and still fill oil or the pressure to exceed the standard pressure value and still continue to press, which may cause the internal pressure of the corrugated tube core 3 to rise sharply, at this time, the pressure relief pipe 7 and the pressure release valve 8 are automatically opened to release pressure, so as to avoid damage to the corrugated tube core 3.

[0039] The corrugated inner oil type oil storage tank provided by the embodiment of the utility model changes one corrugated pipe into three corrugated pipes. If one corrugated pipe is used as oil total capacity compensation, the corrugated pipe diameter is too large or the height is too high under certain demand conditions, because the corrugated pipe is limited by a mold, and the height cannot be increased infinitely, the corrugated pipe is unstable and the external shell is machined, so the existing corrugated pipe usually selects about 40 corrugations. The embodiment of the utility model reduces the machining difficulty of the corrugated pipe core body 3 by arranging three corrugated pipe core bodies 3, meets the oil total capacity compensation requirement, avoids the oil storage tank being too high (too high will cause the corrugated pipe core body to be unstable, increases the risk of oil leakage) and too wide (too wide will affect the discharge distance of the transformer sleeve), greatly improves the technical performance of the corrugated inner oil type oil storage tank.

[0040] In the embodiment of the utility model, the technical features not described in detail are prior art or conventional technical means, which will not be described here.

[0041] Finally, it should be noted that: the above examples are only specific embodiments of the utility model, which are used to illustrate the technical solutions of the utility model, but not to limit it. The protection scope of the utility model is not limited to this. Those skilled in the art should understand that any person skilled in the art can modify or easily think of changes to the technical solutions recorded in the above examples within the technical range disclosed by the utility model, or make equivalent replacement to some technical features. These modifications, changes or replacements do not change the essence of the corresponding technical solutions beyond the spirit and scope of the technical solutions of the embodiments of the utility model, and should be covered in the protection scope of the utility model.

Claims

1. A corrugated internal oil type oil reservoir comprising a rectangular parallelepiped shaped oil reservoir case, a corrugated pipe being located in the oil reservoir case, the corrugated pipe comprising a corrugated pipe core body, the corrugated pipe core body being sealed by upper and lower cover plates which are welded, characterized by, The bottom of the oil tank shell is provided with an oil level digital display screen and a pair of tank bases, and a junction box is arranged on the tank base; a plurality of corrugated pipes are arranged in parallel inside the length direction of the oil tank shell; a distance sensor is arranged outside the core body of one of the corrugated pipes; a top pull wire matched with the distance sensor is fixed above the upper cover plate corresponding to the core body of the corrugated pipe; the junction box is electrically connected with the distance sensor and the oil level digital display screen; a plurality of limiting mechanisms are arranged above the upper cover plate corresponding to each of the core bodies of the corrugated pipes; a pressure relief valve is arranged above the upper cover plate corresponding to one of the core bodies of the corrugated pipes; one end of the pressure relief valve is communicated with the inside of the core body of the corrugated pipe; the other end of the pressure relief valve is communicated with one end of a pressure relief pipe; the other end of the pressure relief pipe penetrates through the oil tank shell and is fixed below the oil tank shell.

2. A corrugated internal oil type reservoir according to claim 1, wherein The pressure relief pipe comprises a corrugated hose and a steel pipe; the main body of the pressure relief pipe is made of the steel pipe; and the upper end of the main body of the pressure relief pipe is connected to the pressure relief valve by the corrugated hose.

3. A corrugated internal oil conservator as claimed in claim 1, wherein, The top ends of the core bodies of the plurality of corrugated pipes are communicated by an exhaust connecting pipe; the exhaust connecting pipe comprises an exhaust steel pipe and an exhaust hose; the exhaust steel pipe is communicated with the inside of the core body of the corrugated pipe by a connecting piece; the exhaust steel pipes are communicated with each other by the exhaust hose; a branch pipe joint is arranged on one of the exhaust steel pipes; the top end of the exhaust pipe is sealed and communicated with the branch pipe joint; and the bottom end of the exhaust pipe penetrates through the bottom of the oil tank shell and is fixed below the oil tank shell.

4. A corrugated internal oil conservator as claimed in claim 3, wherein, An exhaust valve is arranged at the bottom end of the exhaust pipe; and the exhaust valve is in a normally closed state.

5. A corrugated internal oil type reservoir according to claim 1, wherein A main connecting pipe is fixedly arranged below the bottom of the oil tank shell; the main connecting pipe is sealed and communicated with the inside of each of the core bodies of the plurality of corrugated pipes; one end of an oil injection pipe is sealed and communicated with the main connecting pipe; and the other end of the oil injection pipe is provided with an oil injection valve.

6. A corrugated internal oil type reservoir according to claim 1, wherein A high and low oil level alarm device is fixedly arranged inside the oil tank shell; the high and low oil level alarm device comprises an oil level alarm rod and a travel switch; the lower end of the oil level alarm rod is fixedly arranged at the gap between adjacent core bodies of the corrugated pipes; the upper part and the lower part of the oil level alarm rod are both provided with mounting holes; the travel switch is arranged in the mounting hole; the travel switch comprises a travel switch body and an alarm trigger rod; the alarm trigger rod of the upper travel switch is arranged above the upper cover plate; the alarm trigger rod of the lower travel switch is arranged in the gap between adjacent two corrugated pipes; and the travel switch body is electrically connected with the junction box.

7. A corrugated internal oil conservator as claimed in claim 1, wherein, A rubber pad is fixedly arranged on the upper surface of the limiting mechanism.

8. A corrugated internal oil conservator as claimed in claim 1, wherein, An oil level indicating observation window is arranged on the side of the oil tank shell in the vertical direction; the oil level indicating observation window is blocked by a transparent plate; the outer surface of the oil tank shell on both sides of the oil level indicating observation window is respectively provided with an ambient temperature scale mark and an oil level scale mark; and an oil level warning mechanism is arranged on the outer surface of the core body of the corrugated pipe corresponding to the oil level indicating observation window.

9. A corrugated internal oil conservator as claimed in claim 1, wherein, A grounding wire connecting seat is fixedly arranged on the tank base; and the grounding wire connecting seat is connected with the transformer body.

10. A corrugated internal oil-type reservoir according to any one of claims 1-9, characterized in that A plurality of reinforcing ribs are arranged on the top of the oil tank shell in the length direction; the two ends of the oil tank shell in the length direction are circular arc structures matched with the core bodies of the corrugated pipes; a fixed connecting plate made of steel is arranged between the plurality of core bodies of the corrugated pipes; and the two ends of the fixed connecting plate are fixedly arranged above the upper cover plates corresponding to the adjacent core bodies of the corrugated pipes.

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