Trunk type main oil pipe structure for transformer

Abstract

The trunk type main oil pipe structure comprises an oil tank, an oil conservator is installed on the top face of the oil tank through a supporting frame, and a cable bin is installed on the top face of the oil tank through an ascending flanged base. A bent pipe is downwards led out from the bottom of the oil conservator, the bent pipe is communicated with a support through a first gas relay, the bottom end of the support is downwards communicated to the oil tank, the support is transversely communicated with a first main oil pipe, and the support is laterally communicated with a second main oil pipe through a second gas relay to form a trunk type main oil pipe structure; a first gas guide pipe is communicated between the first main oil pipe and the oil tank, a second gas guide pipe is communicated between the second main oil pipe and the cable bin, and a third gas guide pipe is communicated between the first main oil pipe and the ascending flanged base. Through the arrangement of the trunk type main oil pipe structure, the gas guide pipes are communicated between the main oil pipe and the oil tank, between the main oil pipe and the cable bin and between the main oil pipe and the ascending flanged base, so that gas monitoring and early warning can be conducted on cavities including the ascending flanged base and the cable bin through the gas relay on the main oil pipe, and the safety and reliability of normal operation of the transformer are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to an elephant trunk-shaped main oil pipe structure for transformers. Background Technology

[0002] As a core piece of equipment in the power system, the operating status of transformers directly affects the safety and stability of the entire power grid.

[0003] In the design of existing transformers, the main oil pipes mostly adopt a straight or simple curved structure, and safety protection devices such as gas relays are also mainly placed on the straight main oil pipes. This structure cannot effectively monitor and warn of gases such as methane generated at the bushing riser, especially at the cable box bushing riser, which poses certain safety hazards to the normal operation of the transformer. Utility Model Content

[0004] To address the aforementioned issues, this application provides a structurally sound elephant-trunk-shaped main oil pipe structure for transformers. This structure enables gas monitoring and early warning of the cavities, including the riser and cable compartment, via a gas relay on the main oil pipe, effectively improving the safety and reliability of the transformer's normal operation.

[0005] The technical solution adopted in this utility model is as follows:

[0006] An elephant-trunk-shaped main oil pipe structure for a transformer includes an oil tank. An oil conservator is mounted on the top surface of the oil tank via a support frame, and a cable compartment is mounted on the top surface of the oil tank via a riser. A bent pipe extends downward from the bottom of the oil conservator. The bent pipe is connected to a support via a gas relay, and the bottom end of the support is connected downward to the oil tank. A main oil pipe is connected laterally to the support, and a second main oil pipe is connected laterally to the support via a gas relay, forming an elephant-trunk-shaped main oil pipe structure. A vent pipe connects the first main oil pipe to the oil tank, a vent pipe connects the second main oil pipe to the cable compartment, and a vent pipe connects the first main oil pipe to the riser.

[0007] As a further improvement to the above technical solution:

[0008] The bend has an L-shaped structure with a bending angle between 90° and 100°. The vertical end of the bend is connected to the bottom of the oil tank via a valve, and the horizontal part of the bend is inclined downward relative to the horizontal plane.

[0009] The inclination angle between the transverse part of the bend and the horizontal plane is the same as the inclination angle between the first main oil pipe and the horizontal plane, and the inclination angle between the second main oil pipe and the horizontal plane.

[0010] A flexible connecting pipe is connected between the end of the bend and the gas relay, and a valve is installed between the gas relay and the bracket.

[0011] Multiple air guide pipes are arranged at intervals along the length of the main oil pipe toward the oil tank.

[0012] One end of the gas relay 2 is connected to the bracket via valve 3, and the other end of the gas relay 2 is equipped with flexible connecting pipe 2, which is connected to the main oil pipe 2 via valve 4.

[0013] The second flexible connecting pipe is bent at 90°, causing the first main oil pipe and the second main oil pipe to be arranged in parallel.

[0014] The main oil pipe extends upward into a branch, and a pressure relief valve is installed at the end of the branch. A valve five is installed in series on the branch.

[0015] The structure of the support is as follows: it includes a horizontal pipe, a vertical pipe extending downward through the bottom of the horizontal pipe, and a branch pipe extending laterally through the horizontal pipe. The two ends of the horizontal pipe, the bottom end of the vertical pipe, and the end of the branch pipe constitute the four interfaces of the support. The oil storage tank, main oil pipe one, main oil pipe two and oil tank are connected through the four interfaces.

[0016] The axial direction of the transverse pipe is on the same straight line as the axial direction of the transverse part of the bend and the axial direction of the main oil pipe, forming a slope that slopes downward from the transverse part of the bend toward the main oil pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This utility model, through the setting of the elephant trunk-shaped main oil pipe structure, connects the main oil pipe with the oil tank, cable compartment, and riser seat through the gas relay on the main oil pipe, thereby enabling gas monitoring and early warning of the transformer cavity, including the riser seat and cable compartment, through the gas relay on the main oil pipe, effectively improving the safety and reliability of the transformer's normal operation.

[0019] This utility model also has the following advantages:

[0020] By optimizing the main oil pipe structure, the probability of transformer failure due to gas is significantly reduced, while effectively saving the manufacturing cost of transformer products and improving product reliability.

[0021] When gas is generated in the cable compartment, the gas will enter the main oil pipe through the second gas duct, and can be monitored and warned by the second gas relay to ensure the safe and stable operation of the transformer.

[0022] When the pressure in the main oil pipe reaches the set pressure, the pressure relief valve starts to work. The pressure relief valve opens in time to discharge some transformer oil and gas, thereby reducing the pressure in the oil tank and protecting the transformer from damage.

[0023] When a transformer malfunctions and requires maintenance, the maintenance and replacement of components such as gas relay 1, gas relay 2, pressure relief valve, etc., can be achieved by reasonably controlling valves 1, 2, 3, 4, and 5, in the most convenient way and with the least waste of transformer oil. Attached Figure Description

[0024] Figure 1 This is the front view of the present invention.

[0025] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0026] Figure 3 This is a top view of the present invention.

[0027] Figure 4 This is the right view of the present invention.

[0028] Figure 5 This is a schematic diagram of the structure of the bracket of this utility model.

[0029] Among them: 10, oil tank; 20, oil storage tank; 30, main oil pipe one; 40, support; 50, main oil pipe two; 60, cable compartment;

[0030] 301. Valve 1; 302. Bend; 303. Flexible Connector 1; 304. Gas Relay 1; 305. Valve 2; 306. Gas Guide Pipe 1;

[0031] 401. Horizontal pipe; 402. Branch pipe; 403. Vertical pipe;

[0032] 501. Valve 3; 502. Gas Relay 2; 503. Flexible Connector 2; 504. Valve 4; 505. Pressure Relief Valve; 506. Valve 5;

[0033] 601. Air tube two; 602. Air tube three; 603. Elevator seat. Detailed Implementation

[0034] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0035] like Figure 1 , Figure 3 and Figure 4As shown, this embodiment of an elephant trunk-shaped main oil pipe structure for a transformer includes an oil tank 10, an oil conservator 20 mounted on the top surface of the oil tank 10 via a support frame, and a cable compartment 60 mounted on the top surface of the oil tank 10 via a riser 603. A bent pipe 302 extends downward from the bottom of the oil conservator 20, and the bent pipe 302 is connected to a bracket 40 via a gas relay 304. The bottom end of the bracket 40 is connected downward to the oil tank 10, and a main oil pipe 30 is connected laterally to the bracket 40. A second main oil pipe 50 is connected laterally to the bracket 40 via a gas relay 502, thus forming an elephant trunk-shaped main oil pipe structure. A vent pipe 306 connects the main oil pipe 30 to the oil tank 10, a vent pipe 601 connects the main oil pipe 50 to the cable compartment 60, and a vent pipe 602 connects the main oil pipe 30 to the riser 603.

[0036] In this embodiment, through the setting of the elephant trunk-shaped main oil pipe structure, air guide pipes are connected between the main oil pipe and the oil tank 10, the cable compartment 60, and the riser 603. For example, the air guide pipe 306 meets the air guide requirements of the oil tank 10, the air guide pipe 601 meets the air guide requirements of the cable compartment 60, and the air guide pipe 602 meets the air guide requirements of the riser 603. Thus, the gas relay on the main oil pipe can monitor and warn of gas in the transformer cavity, including the riser 603 and the cable compartment 60.

[0037] In this embodiment, when gas is generated in the cable compartment 60, the gas will enter the main oil pipe 50 through the gas duct 601, and can be monitored and warned by the gas relay 502 to ensure the safe and stable operation of the transformer.

[0038] In this embodiment, the gas relay 304 can be used to monitor and provide early warning of the gas entering the main oil pipe 30 from the oil tank 10.

[0039] like Figure 2 As shown, the bend 302 has an L-shaped structure, and the bending angle (α) of the bend 302 is between 90° and 100°, such as 92°. The vertical end of the bend 302 is connected to the bottom of the oil reservoir 20 via valve 301. The horizontal part of the bend 302 is inclined downward relative to the horizontal surface to ensure the smooth flow of oil through the bottom of the oil reservoir 20 to the main oil pipe via the bend 302.

[0040] The inclination angle between the transverse part of the bend 302 and the horizontal plane is consistent with the inclination angle between the main oil pipe 1 30 and the horizontal plane and the inclination angle between the main oil pipe 2 50 and the horizontal plane, which helps to ensure the smooth flow of oil during the overall circulation process, and the overall structure is simplified and consistent.

[0041] A flexible conduit 303 is connected between the end of the bend 302 and the gas relay 304, ensuring the reliability of the connection between the bend 302 and the gas relay 304; a valve 305 is installed between the gas relay 304 and the bracket 40.

[0042] Multiple air guide pipes 306 are arranged at intervals along the length of the main oil pipe 30 toward the oil tank 10, for example, three air guide pipes 306 are arranged to meet the air guide requirements at different locations inside the oil tank 10.

[0043] One end of the gas relay 2 502 is connected to the bracket 40 via valve 3 501, and the other end of the gas relay 2 502 is equipped with flexible connecting pipe 2 503. Flexible connecting pipe 2 503 is connected to the main oil pipe 2 50 via valve 4 504. The connection between the gas relay 2 502 and the main oil pipe 2 50 is ensured by the flexible connecting pipe 2 503.

[0044] The flexible connecting pipe 2503 is bent at 90°, causing the main oil pipe 150 and the main oil pipe 230 to be arranged in parallel.

[0045] The main oil pipe 250 extends upward to a branch, and a pressure relief valve 505 is installed at the end of the branch. A valve 506 is installed in series on the branch.

[0046] In this embodiment, when the pressure in the main oil pipe 50 reaches the set pressure, the pressure relief valve 505 starts to work. The pressure relief valve 505 opens in time to discharge some transformer oil and gas, thereby reducing the pressure in the oil tank and protecting the transformer from damage.

[0047] In this embodiment, the branch of the second main oil pipe 50 is arranged vertically upwards, and the pressure relief valve 505 is located above the second main oil pipe 50.

[0048] like Figure 5 As shown, the structure of the support 40 is as follows: it includes a horizontal pipe 401, a vertical pipe 403 extending downward through the bottom of the horizontal pipe 401, and a branch pipe 402 extending laterally through the horizontal pipe 401. The two ends of the horizontal pipe 401, the bottom end of the vertical pipe 403, and the end of the branch pipe 402 constitute the four interfaces of the support 40. The oil storage tank 20, the first main oil pipe 30, the second main oil pipe 50 and the oil tank 10 are connected through the four interfaces.

[0049] In this embodiment, the bracket 40 not only provides structural support and connection for the main oil pipe 30 and the main oil pipe 50, but also effectively ensures the smooth flow of oil.

[0050] In this embodiment, flanges can be provided at the four interfaces of the bracket 40 to facilitate structural connection, according to actual installation requirements.

[0051] The axial direction of the transverse pipe 401 is aligned with the axial direction of the transverse part of the bend 302 and the axial direction of the main oil pipe 30, forming a slope that slopes downward from the transverse part of the bend 302 toward the main oil pipe 30; thus effectively ensuring smooth oil flow in the main oil pipe and guaranteeing heat dissipation efficiency.

[0052] In this embodiment, the minimum height between the transverse portion of the bend 302 and the top surface of the oil tank 10 is H1; the minimum height between the end of the main oil pipe 30 and the top surface of the oil tank 10 is H2, and H1 is greater than H2.

[0053] In this embodiment, the second main oil pipe 50 is higher than the cable compartment 60, and the second air guide pipe 601 is connected to the second main oil pipe 50 through the cable compartment 60. The end of the second main oil pipe 50 and the top surface of the oil tank 10 meet the minimum height H3, and the relative height between the top surface of the cable compartment 60 and the top surface of the oil tank 10 is H4, where H3 is greater than H4.

[0054] In this embodiment, when the transformer malfunctions and needs maintenance, the maintenance and replacement of components such as gas relay 304, gas relay 502, and pressure relief valve 505 can be achieved by reasonably controlling valves 301, 305, 501, 504, and 506, in the most convenient way and with the least waste of transformer oil.

[0055] In this embodiment, by optimizing the main oil pipe structure, the probability of transformer failure due to gas is significantly reduced, while effectively saving the manufacturing cost of transformer products and improving product reliability.

[0056] This invention enables gas monitoring and early warning of the transformer cavity, including the riser and cable compartment, via a gas relay on the main oil pipe, effectively improving the safety and reliability of the transformer's normal operation.

[0057] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0058] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A trunk-shaped main oil pipe structure for a transformer, comprising an oil tank (10), characterized in that: An oil storage tank (20) is mounted on the top surface of the oil tank (10) via a support frame, and a cable compartment (60) is mounted on the top surface of the oil tank (10) via a riser (603); a bent pipe (302) extends downward from the bottom of the oil storage tank (20), and the bent pipe (302) is connected to a bracket (40) via a gas relay (304). The bottom end of the bracket (40) is connected downward to the oil tank (10), and the bracket (40) is connected laterally to a main oil pipe. (30), the bracket (40) is connected to the main oil pipe (50) via the gas relay (502) to form an elephant trunk-shaped main oil pipe structure; the main oil pipe (30) is connected to the oil tank (10) via the air guide pipe (306), the main oil pipe (50) is connected to the cable compartment (60) via the air guide pipe (601), and the main oil pipe (30) is connected to the riser (603) via the air guide pipe (602).

2. The elephant trunk-shaped main oil pipe structure for a transformer as described in claim 1, characterized in that: The bend (302) has an L-shaped structure and the bending angle of the bend (302) is between 90° and 100°. The vertical end of the bend (302) is connected to the bottom of the oil tank (20) via valve 1 (301). The horizontal part of the bend (302) is inclined downward relative to the horizontal surface.

3. The elephant trunk-shaped main oil pipe structure for a transformer as described in claim 2, characterized in that: The inclination angle between the transverse part of the bend (302) and the horizontal plane is the same as the inclination angle between the first main oil pipe (30) and the horizontal plane, and the inclination angle between the second main oil pipe (50) and the horizontal plane.

4. The elephant trunk-shaped main oil pipe structure for a transformer as described in claim 1, characterized in that: A flexible connecting pipe (303) is connected between the end of the bend (302) and the gas relay (304), and a valve (305) is installed between the gas relay (304) and the bracket (40).

5. The elephant trunk-shaped main oil pipe structure for a transformer as described in claim 1, characterized in that: Multiple air guide pipes (306) are arranged at intervals along the length of the main oil pipe (30) toward the oil tank (10).

6. The elephant trunk-shaped main oil pipe structure for a transformer as described in claim 1, characterized in that: One end of the gas relay 2 (502) is connected to the bracket (40) via valve 3 (501), and the other end of the gas relay 2 (502) is equipped with flexible connecting pipe 2 (503), which is connected to the main oil pipe 2 (50) via valve 4 (504).

7. The elephant trunk-shaped main oil pipe structure for a transformer as described in claim 6, characterized in that: The flexible connecting pipe 2 (503) is bent at 90°, causing the main oil pipe 1 (30) and the main oil pipe 2 (50) to be arranged in parallel.

8. The elephant trunk-shaped main oil pipe structure for a transformer as described in claim 1, characterized in that: The main oil pipe 2 (50) extends upward to a branch, and a pressure relief valve (505) is installed at the end of the branch. A valve 5 (506) is installed in series on the branch.

9. The elephant trunk-shaped main oil pipe structure for a transformer as described in claim 1, characterized in that: The structure of the support (40) is as follows: it includes a horizontal pipe (401), a vertical pipe (403) extending downward through the bottom of the horizontal pipe (401), and a branch pipe (402) extending laterally through the horizontal pipe (401). The two ends of the horizontal pipe (401), the bottom end of the vertical pipe (403), and the end of the branch pipe (402) constitute the four interfaces of the support (40), which connect the oil storage tank (20), the first main oil pipe (30), the second main oil pipe (50), and the oil tank (10).

10. The elephant trunk-shaped main oil pipe structure for a transformer as described in claim 9, characterized in that: The axial direction of the transverse pipe (401) is on the same straight line as the axial direction of the transverse part of the bend (302) and the axial direction of the main oil pipe (30), forming a slope that slopes downward from the transverse part of the bend (302) toward the main oil pipe (30).

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