Emergency oil discharge device for main transformer of offshore booster station
By designing an emergency oil discharge device on the main transformer of the offshore booster station and using a remote control unit and ball valve system, rapid oil discharge can be achieved, solving the problem of oil not being able to be discharged in time when the main transformer of the offshore booster substation catches fire, and improving fire extinguishing efficiency and equipment stability.
Patent Information
- Application Number
- CN202422812520.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-18
AI Technical Summary
When a fire occurs in the main transformer of an offshore boost substation, the oil cannot be discharged in time, causing the fire to intensify, affecting the fire-fighting efficiency, and reducing operational safety and stability.
An emergency oil discharge device for the main transformer of an offshore substation was designed. It includes a normal oil discharge pipeline and an emergency oil discharge pipeline. The normally closed and normally open electric ball valves are controlled by a remote control unit to achieve rapid oil discharge. A leak detector is used to ensure pipeline stability.
In the event of a fire, the oil in the main transformer can be quickly drained to reduce the spread of fire, improve fire extinguishing efficiency, and ensure the stable operation of the main transformer.
Smart Images
Figure CN223377997U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of offshore boosting stations, in particular to an emergency oil draining device for a main transformer of an offshore boosting station. Background Art
[0002] The offshore booster substation is the core part of the offshore wind farm, and the main transformer is the key equipment of the offshore booster substation. When the main transformer is working, oil needs to be injected into the main transformer to cool the main transformer and prevent the main transformer from overheating.
[0003] Since the offshore boost substation is located at sea, accessibility is poor (unmanned), and oil is a combustible substance that supports combustion. When a fire occurs in the main transformer, the oil inside the main transformer cannot be discharged in time, which will aggravate the fire, increase the difficulty of fire fighting, affect the fire fighting efficiency, and thus reduce the safety and stability of the main transformer operation.
[0004] Therefore, how to realize the emergency oil drainage of the main transformer has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention
[0005] In view of this, the purpose of the present invention is to provide an emergency oil drain device for the main transformer of an offshore booster station in order to solve the above technical problems.
[0006] The technical solution adopted by the utility model is: an emergency oil drain device for the main transformer of an offshore booster station, comprising:
[0007] Main transformer;
[0008] a tee pipe, the oil inlet end of the tee pipe being connected to the oil outlet of the main transformer;
[0009] A normal oil drain pipeline, wherein the oil inlet end of the normal oil drain pipeline is connected to the first oil drain port of the tee pipe, the oil discharge end of the normal oil drain pipeline is connected to the emergency oil pool, and a manual oil drain valve is installed on the normal oil drain pipeline;
[0010] An emergency oil discharge pipeline, wherein the oil inlet end of the emergency oil discharge pipeline is connected to the second oil discharge port of the tee pipe, the oil discharge end of the emergency oil discharge pipeline is connected to the emergency oil pool, and a normally open electric ball valve, a normally closed electric ball valve and a leakage detector are installed in sequence along the oil flow direction of the emergency oil discharge pipeline;
[0011] A remote control unit, wherein the remote control unit is electrically connected to the normally closed electric ball valve, and the remote control unit can control the opening and closing of the normally closed electric ball valve. The remote control unit is electrically connected to the leakage detector and the normally open electric ball valve, and the remote control unit can control the opening and closing of the normally open electric ball valve according to the oil leakage information detected by the leakage detector.
[0012] Preferably, a stop valve for controlling the switching on and off of the emergency oil discharge pipeline is installed on the emergency oil discharge pipeline, and the stop valve is located between the three-way pipe and the normally open electric ball valve.
[0013] Preferably, a stop valve for vacuuming and oiling the pipeline is installed on the emergency oil discharge pipeline, and the stop valve is located between the stop valve and the normally open electric ball valve.
[0014] Preferably, the power supply circuit, control circuit and opening and closing indication circuit of the normally open electric ball valve and the normally closed electric ball valve are independent of each other.
[0015] Preferably, the normally open electric ball valve and the normally closed electric ball valve have a manual start and stop function.
[0016] Beneficial effects of the utility model:
[0017] The utility model connects a normal oil drain pipeline and an emergency oil drain pipeline between the oil drain port of the main transformer and the accident oil pool. When the main transformer is overhauled, the oil inside the main transformer can be discharged to the accident oil pool through the manual oil drain valve and the normal oil drain pipeline. When a fire occurs in the main transformer, the operation and maintenance personnel can control the normally closed electric ball valve to open through the remote control unit, and quickly discharge the oil inside the main transformer into the accident oil pool through the emergency oil drain pipeline, which can effectively reduce the spread of fire and improve the fire extinguishing efficiency. When the normally closed electric ball valve fails to issue, resulting in leakage of oil inside the main transformer, the leakage detector can detect the oil leakage information and control the normally open electric ball valve to close through the remote control module, thereby improving the stability of the emergency oil drain pipeline operation, preventing oil leakage, and ensuring the stable operation of the main transformer. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a plan view of the emergency oil draining device for the main transformer of the offshore booster station according to the present invention;
[0019] Figure 2 It is a side view of the emergency oil drain device for the main transformer of the offshore booster station according to the present invention.
[0020] Description of reference numerals in the figures:
[0021] 1. Main transformer; 2. Tee pipe; 3. Normal oil drain line; 4. Emergency oil sump; 5. Manual oil drain valve; 6. Emergency oil drain line; 7. Normally open electric ball valve; 8. Normally closed electric ball valve; 9. Leak detector; 10. Stop valve; 11. Configure stop valve. DETAILED DESCRIPTION
[0022] The following is a further detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, and are not intended to limit the present invention.
[0023] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0025] In addition, in the description of the present invention, unless otherwise specified, “a plurality of” means two or more.
[0026] Examples, such as Figure 1 and Figure 2 As shown, an emergency oil drain device for a main transformer of an offshore booster station comprises:
[0027] The main transformer 1 has an oil drain port.
[0028] A tee pipe 2 , the oil inlet end of which is fixedly connected to the oil outlet of the main transformer 1 .
[0029] The normal oil drain pipeline 3 has its oil inlet end fixedly connected to the first oil drain port of the tee pipe 2, its oil discharge end fixedly connected to the accident oil pool 4, and a manual oil drain valve 5 is installed on the normal oil drain pipeline 3.
[0030] The emergency oil drain pipeline 6 has its oil inlet end fixedly connected to the second oil drain port of the tee pipe 2, and its oil discharge end fixedly connected to the accident oil pool 4, and a normally open electric ball valve 7, a normally closed electric ball valve 8 and a leakage detector 9 are installed in sequence on the emergency oil drain pipeline 6 along the direction of oil flow.
[0031] The remote control unit is electrically connected to the normally closed electric ball valve 8, and the remote control unit can control the opening and closing of the normally closed electric ball valve 8; the remote control unit is electrically connected to the leakage detector 9 and the normally open electric ball valve 7, and the remote control unit can control the opening and closing of the normally open electric ball valve 7 according to the oil leakage information detected by the leakage detector 9.
[0032] In the present invention, a normal oil drain pipeline 3 and an emergency oil drain pipeline 6 are connected between the oil drain port of the main transformer 1 and the accident oil pool 4. When the main transformer 1 is overhauled, the oil inside the main transformer 1 can be discharged to the accident oil pool 4 through the manual oil drain valve 5 and the normal oil drain pipeline 3; when a fire occurs in the main transformer 1, the operation and maintenance personnel can control the normally closed electric ball valve 8 to open through the remote control unit, and quickly discharge the oil inside the main transformer 1 into the accident oil pool 4 through the emergency oil drain pipeline 6, which can effectively reduce the spread of fire and improve the fire extinguishing efficiency; when the normally closed electric ball valve 8 fails, causing the oil inside the main transformer 1 to leak, the leakage detector 9 can detect the oil leakage information and control the normally open electric ball valve 7 to close through the remote control module, thereby improving the stability of the operation of the emergency oil drain pipeline 6, preventing oil leakage, and ensuring the stable operation of the main transformer 1.
[0033] Specific embodiment 1, as Figure 1 and Figure 2 As shown, an emergency oil discharge device for the main transformer of an offshore substation is provided, which includes: a main transformer 1, a tee pipe 2, a normal oil discharge pipeline 3, an emergency oil pool 4 and an emergency oil discharge pipeline 6.
[0034] The main transformer 1 is a 330 kV main transformer of an offshore boost substation, and an oil drain port is installed at the bottom of one side of the main transformer 1 .
[0035] The three-way pipe 2 has an oil inlet end, a first oil outlet and a second oil outlet, and the oil inlet end of the three-way pipe 2 is fixedly connected to the oil outlet of the main transformer 1 .
[0036] The normal oil drain pipeline 3 is installed on one side of the main transformer 1, and the normal oil drain pipeline 3 is connected between the main transformer 1 and the emergency oil pool 4. Specifically, the oil inlet end of the normal oil drain pipeline 3 is fixedly connected to the first oil drain port of the tee pipe 2, and the oil discharge end of the normal oil drain pipeline 3 is fixedly connected to the emergency oil pool 4. In addition, a manual oil drain valve 5 is installed on the normal oil drain pipeline 3 for manual emergency oil discharge of the main transformer 1.
[0037] The emergency oil drain pipeline 6 is installed on one side of the main transformer 1, and the emergency oil drain pipeline 6 is connected between the main transformer 1 and the accident oil pool 4. Specifically, the oil inlet end of the emergency oil drain pipeline 6 is fixedly connected to the second oil drain port of the tee pipe 2, and the oil discharge end of the emergency oil drain pipeline 6 is fixedly connected to the accident oil pool 4. In addition, a shut-off valve 10, a normally open electric ball valve 7, a normally closed electric ball valve 8 and a leakage detector 9 are sequentially installed on the emergency oil drain pipeline 6 along the direction of oil flow.
[0038] The stop valve 10 is used to control the switching on and off of the emergency oil discharge pipeline 6. That is, when the stop valve 10 is adjusted to the closed state, the emergency oil discharge pipeline 6 is out of operation, and the main transformer 1 can only be drained by manually operating the manual oil drain valve 5 on the normal oil discharge pipeline 3; when the stop valve 10 is adjusted to the open state, the emergency oil discharge pipeline 6 is put into operation, and the main transformer 1 can be drained by remotely operating the normally closed electric ball valve 8 to open.
[0039] The normally open electric ball valve 7 is used to urgently close the emergency oil drain pipeline 6 when a leakage accident occurs in the normally closed electric ball valve 8 to prevent the oil inside the main transformer 1 from leaking.
[0040] Both the normally open electric ball valve 7 and the normally closed electric ball valve 8 are powered by 220V AC and are taken from the oil discharge control panel of the offshore booster station relay protection room. A fast switching circuit breaker is configured in the panel, and the normally open electric ball valve 7 and the normally closed electric ball valve 8 have local manual start / stop function and time reset function (after the electric ball valve is opened by mistake to start oil discharge, the opening of the electric ball valve can be stopped at any time before the electric ball valve is fully opened. The electric ball valve closing and oil discharge stop instruction should not be executed after it is fully opened). That is, both the normally open electric ball valve 7 and the normally closed electric ball valve 8 can be manually opened and closed. At the same time, the electric ball valve and the switch control circuit use independent relays and high-power anti-shake relays. The power supply circuit, control circuit and opening and closing indication circuit of the normally open electric ball valve 7 and the normally closed electric ball valve 8 are independent of each other. At the same time, locking is considered. When the high-voltage side switch of the main transformer is disconnected and the alarm signal of the automatic fire alarm system is received, the start control circuit can be connected.
[0041] The emergency oil discharge pipeline 6 is placed in a fireproof box, and the box body and the oil pipe bracket should be used as a foundation to facilitate leveling and the bracket is firmly fixed.
[0042] The leakage detector 9 is used to detect whether there is oil flow between the normally closed electric ball valve 8 and the accident oil pool 4, and the leakage detector 9 can send a signal to the remote control unit of the main control room. By combining the leakage detector 9 with the valve action signal, it can be determined whether the normally closed electric ball valve 8 is faulty.
[0043] When the normally closed electric ball valve 8 is in the closed state, the leakage detector 9 detects an oil leakage signal, and the normally closed electric ball valve 8 is not closed tightly; when the normally closed electric ball valve 8 is in the open state, the leakage detector 9 does not detect an oil leakage signal, and the normally closed electric ball valve 8 cannot be opened normally.
[0044] The remote control unit is installed in the central control room. The remote control unit is electrically connected to the normally closed electric ball valve 8, and the remote control unit can control the opening and closing of the normally closed electric ball valve 8; the remote control unit is electrically connected to the leakage detector 9 and the normally open electric ball valve 7, and the remote control unit can control the opening and closing of the normally open electric ball valve 7 according to the oil leakage information detected by the leakage detector 9.
[0045] When the main transformer 1 needs to drain oil, the operation and maintenance personnel manually start the emergency oil drain start / stop switch handle set on the relay protection room cabinet at the onshore centralized control center, open the normally closed electric ball valve 8 to drain the oil, and the oil drain control cabinet in the relay protection room of the offshore substation receives the valve start / stop signal.
[0046] Preferably, a stop valve 10 for vacuuming and oiling the emergency oil discharge pipeline 6 is installed, and the stop valve 10 is located between the stop valve 10 and the normally open electric ball valve 7 .
[0047] This arrangement is because: when the emergency oil drain pipeline 6 is installed on the main transformer 1 that has been filled with oil, or when the normally closed electric ball valve 8 and the normally open electric ball valve 7 need to be inspected when the main transformer 1 is in operation, it is necessary to evacuate the pipeline between the normally closed electric ball valve 8 and the stop valve 10 by configuring the stop valve 10 to prevent the gas in the pipeline from entering the main transformer 1 when the stop valve 10 is opened, thereby ensuring the normal operation of the main transformer 1.
[0048] The working process of the emergency oil discharge device of the utility model is as follows:
[0049] When the emergency oil discharge pipeline 6 is put into operation, the normally open electric ball valve 7 is in the open state and the normally closed electric ball valve 8 is in the closed state. The oil discharge can only be started when the normally open electric ball valve 7 and the normally closed electric ball valve 8 are opened at the same time. The oil discharge stops when either electric ball valve is closed.
[0050] The operating personnel remotely and manually control the opening and closing of the normally open electric ball valve 7 and the normally closed electric ball valve 8 in the central control room of the onshore centralized control center.
[0051] When the on-duty personnel activate the emergency oil drain remote control contact or the start / stop switch handle, the valve opening start relay coil is energized through the series-connected normally closed contacts of the relay, the normally closed contacts of the limit full-open device and the transformer high-voltage side position signal expansion contacts, thereby opening the electric ball valve; when the electric ball valve is in the fully open position, the fully open limit normally closed contact becomes an open point, and the electric ball valve loses power.
[0052] Compared with the prior art, the present invention has at least the following beneficial technical effects:
[0053] The emergency oil discharge device of the utility model can, when an emergency occurs, control the main transformer of the offshore boost substation to perform emergency oil discharge through the remote control unit arranged in the central control room of the onshore centralized control center. Under the premise of ensuring personal safety, the oil of the main transformer is discharged in case of fire fault, thereby reducing the spread of fire and improving the efficiency of fire extinguishing.
[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.
Claims
1. An emergency oil drain device for main transformer of offshore booster station, characterized in that: include: Main transformer (1); A tee pipe (2), the oil inlet end of the tee pipe (2) being connected to the oil outlet of the main transformer (1); A normal oil drain pipeline (3), wherein the oil inlet end of the normal oil drain pipeline (3) is connected to the first oil drain port of the tee pipe (2), the oil drain end of the normal oil drain pipeline (3) is connected to the emergency oil pool (4), and a manual oil drain valve (5) is installed on the normal oil drain pipeline (3); An emergency oil discharge pipeline (6), wherein the oil inlet end of the emergency oil discharge pipeline (6) is connected to the second oil discharge port of the tee pipe (2), the oil discharge end of the emergency oil discharge pipeline (6) is connected to the accident oil pool (4), and a normally open electric ball valve (7), a normally closed electric ball valve (8) and a leakage detector (9) are sequentially installed on the emergency oil discharge pipeline (6) along the oil flow direction; A remote control unit is connected to the normally closed electric ball valve (8) by electrical signals, and the remote control unit is capable of controlling the opening and closing of the normally closed electric ball valve (8); the remote control unit is connected to the leakage detector (9) and the normally open electric ball valve (7) by electrical signals, and the remote control unit is capable of controlling the opening and closing of the normally open electric ball valve (7) according to oil leakage information detected by the leakage detector (9).
2. The offshore booster station main transformer emergency oil draining device according to claim 1, characterized in that: A stop valve (10) for controlling the switching of the emergency oil discharge pipeline (6) is installed on the emergency oil discharge pipeline (6), and the stop valve (10) is located between the three-way pipe (2) and the normally open electric ball valve (7).
3. The emergency oil draining device for main transformer of offshore booster station according to claim 2, characterized in that: The emergency oil discharge pipeline (6) is provided with a stop valve (11) for vacuuming and oiling the pipeline. The stop valve (11) is located between the stop valve (10) and the normally open electric ball valve (7).
4. The emergency oil draining device for main transformer of offshore booster station according to claim 3 is characterized in that: The power supply circuit, control circuit and opening and closing indication circuit of the normally open electric ball valve (7) and the normally closed electric ball valve (8) are all independent of each other.
5. The emergency oil draining device for main transformer of offshore booster station according to claim 4, characterized in that: The normally open electric ball valve (7) and the normally closed electric ball valve (8) have manual start and stop functions.