Quick oil-fire separation device for transformer, transformer and oil-fire separation method

Abstract

The present invention discloses a rapid oil-fire separation device for a transformer, a transformer and an oil-fire separation method. The rapid oil-fire separation device includes: a first oil drainage pipeline (1) and a second oil drainage pipeline (2); the first oil drainage pipeline (1) is connected and communicated with the transformer body, and a manual valve (11), an oil drainage pump (12), a first electric normally closed valve (13), a first electric normally open valve (14) and a first manual normally open valve (15) are provided on the first oil drainage pipeline (1); the second oil drainage pipeline (2) is connected and communicated with the oil conservator, and a second electric normally closed valve (21), a second electric normally open valve (22) and a second manual normally open valve (23) are provided on the second oil drainage pipeline (2); the above rapid oil-fire separation device is provided in a safety intelligent transformer, and the rapid oil-fire separation device for the transformer has the advantages of fast oil drainage speed, high safety, etc.

Description

Technical Field

[0001] The present invention discloses a technology related to transformers, and particularly relates to a rapid oil-fire separation device for a transformer, a transformer, and an oil-fire separation method. Background Art

[0002] In the production and operation activities of industrial enterprises, safety is of primary importance. With the progress and development of society, people increasingly attach importance to production safety, especially large industrial enterprises such as power plants and substations. Since such enterprises need to use large mechanical equipment and there are relatively large potential safety hazards, the safety of such enterprises is particularly emphasized. In power enterprises such as power plants and substations, large transformers are often used. Once a transformer catches fire, it not only poses a threat to the lives of the staff, but also causes huge losses to the power enterprise and has an adverse impact on the surrounding people.

[0003] For transformer fire accidents, the commonly used existing treatment methods are to control the spread and development of the fire, take timely fire extinguishing measures at the fire location of the transformer, and drain the oil in the transformer as soon as possible to avoid direct contact between the oil and the open fire, so as to prevent the fire from spreading and even causing an explosion. Currently, there is no dedicated device for quickly draining the oil in the transformer to keep the oil away from the open fire. Now, the oil in the transformer is drained manually, not only is the drainage speed of the oil in the transformer slow, but also the staff need to operate near the transformer, so it is extremely easy to cause the fire to spread and cause serious casualties and economic losses.

[0004] How to solve the problem of low safety of the transformer caused by the inability to quickly drain the oil in the transformer during the treatment of transformer fire accidents has become an urgent problem to be solved by people. Summary of the Invention

[0005] In view of this, the present invention discloses a rapid oil-fire separation device for a transformer, a transformer, and an oil-fire separation method, so as to at least solve the problem that when the existing transformer catches fire, the safety of the transformer is low due to the inability to quickly drain the oil.

[0006] On the one hand, the present invention provides a rapid oil-fire separation device for a transformer. The transformer includes: a transformer body and an oil conservator. The rapid oil-fire separation device includes: a first oil drainage pipeline 1 and a second oil drainage pipeline 2;

[0007] The oil inlet end of the first oil discharge pipeline 1 is connected and communicated with the oil storage cavity of the transformer body. Along the axial direction of the first oil discharge pipeline 1, a manual valve 11, an oil discharge pump 12, a first electric normally closed valve 13, a first electric normally open valve 14, and a first manual normally open valve 15 are sequentially arranged from the oil inlet end to the oil outlet end. A first branch 16 communicating with the first oil discharge pipeline 1 is connected in parallel at both ends of the first electric normally closed valve 13, and a first manual normally closed valve 161 is arranged on the first branch 16;

[0008] The oil inlet end of the second oil discharge pipeline 2 is connected and communicated with the bottom of the oil conservator. Along the axial direction of the second oil discharge pipeline 2, a second electric normally closed valve 21, a second electric normally open valve 22, and a second manual normally open valve 23 are sequentially arranged from the oil inlet end to the oil outlet end. A second branch 24 communicating with the second oil discharge pipeline 2 is connected in parallel at both ends of the second electric normally closed valve 21, and a second manual normally closed valve 241 is arranged on the second branch 24.

[0009] Preferably, the first electric normally closed valve 13 is composed of two serially connected electric normally closed valves.

[0010] Further preferably, the first manual normally closed valve 161 is composed of two serially connected manual normally closed valves.

[0011] Further preferably, the second electric normally closed valve 21 is composed of two serially connected electric normally closed valves.

[0012] Further preferably, the second manual normally closed valve 241 is composed of two serially connected manual normally closed valves.

[0013] Further preferably, a third electric normally open valve 17 and a third manual normally open valve 18 are also arranged at intervals downstream of the first electric normally open valve 14 and the first manual normally open valve 15 in the first oil discharge pipeline 1;

[0014] A fourth electric normally open valve and a fourth manual normally open valve are also arranged at intervals downstream of the second electric normally open valve 22 and the second manual normally open valve 23 in the second oil discharge pipeline 2.

[0015] On the other hand, the present invention also provides a safe and intelligent transformer, which includes: a transformer body A, an oil conservator B, a nitrogen filling device C, a rapid oil-fire separation device D, and a controller;

[0016] A heavy gas trip, a fire alarm signal detection device, a transformer incoming line switch trip, and an oil level gauge are arranged on the transformer body A;

[0017] The oil conservator B is communicated with the oil storage cavity of the transformer body A;

[0018] The air outlet of the nitrogen filling device C is communicated with the oil storage chamber of the transformer body A;

[0019] The fast oil-fire separation device D is the above-mentioned fast oil-fire separation device, and the oil inlet end of the first oil drainage pipeline 1 in the fast oil-fire separation device is connected and communicated with the oil storage chamber of the transformer body A, and the oil inlet end of the second oil drainage pipeline 2 in the fast oil-fire separation device is connected and communicated with the bottom of the oil conservator B;

[0020] The input ends of the controller are respectively connected with the output end of the heavy gas trip, the output end of the fire alarm signal detection device, the output end of the transformer incoming line switch trip, and the output end of the oil level gauge, and the output ends of the controller are respectively connected with the control end of the nitrogen filling device C, the control end of the oil drainage pump 12, the control end of the first electric normally closed valve 13, the control end of the first electric normally open valve 14, the control end of the second electric normally closed valve 21, and the control end of the second electric normally open valve 22.

[0021] The present invention also provides another safe and intelligent transformer, which includes: a transformer body A, an oil conservator B, a nitrogen filling device C, a fast oil-fire separation device D, and a controller;

[0022] A heavy gas trip, a fire alarm signal detection device, a transformer incoming line switch trip, and an oil level gauge are arranged on the transformer body A;

[0023] The oil conservator B is communicated with the oil storage chamber of the transformer body A;

[0024] The air outlet of the nitrogen filling device C is communicated with the oil storage chamber of the transformer body A;

[0025] The fast oil-fire separation device D is a kind of fast oil-fire separation device as above, and the oil inlet end of the first oil drainage pipeline 1 in the fast oil-fire separation device is connected and communicated with the oil storage chamber of the transformer body A, and the oil inlet end of the second oil drainage pipeline 2 in the fast oil-fire separation device is connected and communicated with the bottom of the oil conservator B;

[0026] The input ends of the controller are respectively connected with the output end of the heavy gas trip, the output end of the fire alarm signal detection device, and the output end of the transformer incoming line switch trip, and the output ends of the controller are respectively connected with the control end of the nitrogen filling device C, the control end of the oil drainage pump 12, the control end of the first electric normally closed valve 13, the control end of the first electric normally open valve 14, the control end of the second electric normally closed valve 21, the control end of the second electric normally open valve 22, the control end of the third electric normally open valve 17, and the control end of the fourth electric normally open valve.

[0027] In addition, the present invention also provides a method for separating oil and fire of a transformer, which is applicable to the above-mentioned safety intelligent transformer, and the specific steps of the method are as follows:

[0028] Receive the signals sent by the heavy gas trip, fire alarm signal detection device, and transformer incoming line switch trip in real time;

[0029] When two or more abnormal signals are received, control the oil discharge pump in the first oil discharge pipeline to work, and at the same time control the first electric normally closed valve in the first oil discharge pipeline to open, and discharge the oil in the transformer body;

[0030] After the oil in the first oil discharge pipeline is discharged, close the channel between the transformer body and the oil conservator, control the second electric normally closed valve in the second oil discharge pipeline to open, and discharge the oil in the oil conservator;

[0031] After the oil in the second oil discharge pipeline is discharged, control the nitrogen filling device to open and introduce nitrogen into the transformer;

[0032] Until the oil level in the transformer body and the oil level in the oil conservator are lower than the set threshold values, control the first electric normally closed valve in the first oil discharge pipeline and the second electric normally closed valve in the second oil discharge pipeline to close respectively.

[0033] Preferably, the fault conditions of the first electric normally closed valve in the first oil discharge pipeline and the second electric normally closed valve in the second oil discharge pipeline are monitored in real time;

[0034] When the first electric normally closed valve in the first oil discharge pipeline fails, manually open / close the first manually normally closed valve;

[0035] When the second electric normally closed valve in the second oil discharge pipeline fails, manually open / close the second manually normally closed valve.

[0036] The rapid oil-fire separation device for a transformer provided by the present invention is provided with a first oil discharge pipeline and a second oil discharge pipeline respectively connected to the transformer body and the oil conservator, so as to be able to smoothly discharge the oil in the transformer body and the oil conservator in case of danger. Among them, an oil pump, an electric valve, and a manual valve are arranged on the first oil discharge pipeline. The oil pump provides output power for discharging the oil in the transformer body, and the electric valve and the manual valve can realize the dual control of electric and manual discharge of the oil in the first oil discharge pipeline. While improving the oil discharge speed, the failure rate can also be reduced and the safety can be improved; the second oil discharge pipeline utilizes the self-gravity of the oil in the oil conservator to realize the discharge of the oil, and at the same time, the dual control of the electric valve and the manual valve is also adopted on the second oil discharge pipeline.

[0037] In the safe and intelligent transformer provided by the present invention, the controller controls the specific actions of the electric valves in the fast oil-fire separation device according to the specific output signals of heavy gas tripping, fire alarm signal detection device, transformer incoming line switch tripping, and oil level gauge, so as to realize the discharge or stop of the oil products in the transformer body and the oil conservator. At the same time, the controller controls the nitrogen filling device to fill nitrogen into the transformer, so as to isolate the oil products from the air, realize the separation of oil and fire, and improve the use safety of the transformer.

[0038] The oil-fire separation method for the transformer provided by the present invention can timely discharge the oil products in the transformer when the transformer has an abnormality, thereby improving safety.

[0039] The fast oil-fire separation device for the transformer provided by the present invention has the advantages of simple structure, reasonable design, convenient use, high oil discharge speed, low failure rate, high safety, etc. Brief Description of the Drawings

[0040] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments in line with the present invention, and are used together with the specification to explain the principles of the present invention.

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0042] Figure 1 It is a schematic structural diagram of a fast oil-fire separation device for a transformer provided by an embodiment disclosed by the present invention;

[0043] Figure 2 It is a schematic structural diagram of a safe and intelligent transformer provided by an embodiment disclosed by the present invention. Detailed Description of the Embodiments

[0044] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are only examples of devices consistent with some aspects of the present invention as detailed in the appended claims.

[0045] See Figure 1A rapid oil-fire separation device for a transformer. The above-mentioned transformer mainly includes a transformer body and an oil conservator, and the rapid oil-fire separation device is composed of a first oil discharge pipeline 1 and a second oil discharge pipeline 2. Among them, the inlet end of the first oil discharge pipeline 1 is connected and communicated with the oil storage cavity of the transformer body, and along the axis of the first oil discharge pipeline 1, a manual valve 11, an oil discharge pump 12, a first electric normally closed valve 13, a first electric normally open valve 14, and a first manual normally open valve 15 are installed in sequence from the inlet end to the outlet end. By opening / closing the manual valve 11, the connection between the first oil discharge pipeline 1 and the oil storage cavity in the transformer body can be controlled. Usually, the manual valve 11 is in the open state, and the setting of the oil discharge pump 12 can provide power for the discharge of the oil product in the transformer body, thereby increasing its discharge speed and improving the response speed to danger handling. Substantially, the first electric normally closed valve 13 is the main control switch for the operation of the first oil discharge pipeline 1. Usually, this switch is in the normally closed state. Blocked by it, the oil product cannot be discharged outward. When a danger occurs, the first electric normally closed valve 13 can be controlled to be in the open state to discharge the oil product. To reduce the failure rate of the first electric normally closed valve 13, preferably, two series-connected electric normally closed switches are selected for the first electric normally closed valve 13. To prevent the electric valve from failing to work, a first branch 16 communicating with the first oil discharge pipeline 1 is connected in parallel at both ends of the first electric normally closed valve 13, and a first manual normally closed valve 161 is provided on the first branch 16. When the above-mentioned first electric normally closed valve 13 fails, the first manual normally closed valve 161 can be manually screwed to the open state, thereby realizing the connection of the front and back of the first oil discharge pipeline 1 and completing the discharge of the oil product. Similarly, the first manual normally closed valve 161 is preferably composed of two series-connected manual normally closed valves.

[0046] To further improve the safety factor of the operation of the first oil discharge pipeline 1, as an improvement of the solution, a third electric normally open valve 17 and a third manual normally open valve 18 can be installed at intervals downstream of the first electric normally open valve 14 and the first manual normally open valve 15. When the first electric normally open valve 14 and the first manual normally open valve 15 cannot work properly, the third electric normally open valve 17 and the third manual normally open valve 18 can be used to complete the opening and closing work of the pipeline, improving the stability of the equipment operation.

[0047] The oil inlet end of the second oil discharge pipeline 2 is connected and communicated with the bottom of the oil storage tank. Along the axial direction of the second oil discharge pipeline 2, a second normally closed electric valve 21, a second normally open electric valve 22, and a second normally open manual valve 23 are sequentially installed from the oil inlet end to the oil outlet end. The working process and principle of the second oil discharge pipeline 2 are similar to those of the first oil discharge pipeline 1. The difference is that the first oil discharge pipeline 1 uses the oil discharge pump 12 as the power source for oil output, while the discharge of oil in the second oil discharge pipeline 2 completely depends on the self-gravity of the oil stored in the oil storage tank. Therefore, the second oil discharge pipeline 2 needs to be connected and communicated with the bottom of the oil storage tank. Whether the second oil discharge pipeline 2 works or not is mainly achieved by controlling the opening / closing state of the second normally closed electric valve 21. The second normally closed electric valve 21 can be composed of two serially connected normally closed electric valves. In order to reduce the failure rate, a second branch 24 communicating with the second oil discharge pipeline 2 is connected in parallel at both ends of the second normally closed electric valve 21. A second normally closed manual valve 241 is provided on the second branch 24. When the second normally closed electric valve 21 cannot be normally opened, the second normally closed manual valve 241 can be opened to enable the oil in the oil storage tank to be quickly discharged. Similarly, the second normally closed manual valve 241 can also be composed of two serially connected normally closed manual valves.

[0048] In order to further improve the safety factor of the operation of the second oil discharge pipeline 2, as an improvement of the solution, a fourth normally open electric valve and a fourth normally open manual valve are also arranged at intervals downstream of the second normally open electric valve 22 and the second normally open manual valve 23 in the second oil discharge pipeline 2. When the second normally open electric valve 22 and the second normally open manual valve 23 cannot work normally, the fourth normally open electric valve and the fourth normally open manual valve can be used to complete the opening and closing work of the pipeline, improving the stability of the equipment operation.

[0049] The above-mentioned rapid oil-fire separation device for transformers has a first oil discharge pipeline connected to the transformer body. An oil discharge pump provides power for the first oil discharge pipeline, and multiple valves installed on the first oil discharge pipeline are used to enable the oil in the transformer body to be quickly discharged through the first oil discharge pipeline. Among the above-mentioned multiple valves, there are both electric valves and manual valves. When the electric valves fail, the manual valves can be used for control to reduce the failure rate. Similarly, for the second oil discharge pipeline connected to the oil conservator, it is controlled by the self-gravity of the oil and multiple valves installed on the second oil discharge pipeline, enabling the oil in the oil conservator to be quickly discharged through the second oil discharge pipeline. It also adopts the form of dual electric and manual valves. During actual use, electric valves are preferentially used to avoid staff approaching the abnormally operating transformer and ensure the safety of the staff. When the electric valves fail, staff need to manually turn the manual valves to avoid the deterioration of the danger and thus keep the danger under control at all times. In summary, when the transformer is in an abnormal operating state such as a fire, the rapid oil-fire separation device can quickly discharge the oil in the transformer to achieve the purpose of oil-fire separation, avoid the situation of the fire spreading or even explosion caused by the direct contact between the oil and the open fire, thereby ensuring the personal safety of the staff, reducing economic losses, and improving safety.

[0050] The above-mentioned rapid oil-fire separation device for transformers involves various electric valves and manual valves. The above-mentioned electric valves and manual valves can be butterfly valves or ball valves, etc. Preferably, butterfly valves are used.

[0051] See Figure 2It is a safety intelligent transformer, which is composed of a transformer body A, an oil conservator B, a nitrogen filling device C, a rapid oil-fire separation device D and a controller. A heavy gas trip, a fire signal detection device, a transformer incoming line switch trip and an oil level gauge are arranged on the transformer body A; the oil conservator B is communicated with the oil storage cavity of the transformer body A; the air outlet of the nitrogen filling device C is communicated with the oil storage cavity of the transformer body A; the rapid oil-fire separation device D is the rapid oil-fire separation device in the above implementation scheme, and the inlet end of the first oil discharge pipeline 1 in the rapid oil-fire separation device is connected and communicated with the oil storage cavity of the transformer body A, and the inlet end of the second oil discharge pipeline 2 in the rapid oil-fire separation device is connected and communicated with the bottom of the oil conservator B; the input end of the controller is respectively connected with the output end of the heavy gas trip, the output end of the fire signal detection device, the output end of the transformer incoming line switch trip and the output end of the oil level gauge, and the output end of the controller is respectively connected with the control end of the nitrogen filling device C, the control end of the oil discharge pump 12, the control end of the first electric normally closed valve 13, the control end of the first electric normally open valve 14, the control end of the second electric normally closed valve 21 and the control end of the second electric normally open valve 22. When a third electric normally open valve 17 is arranged in the first oil discharge pipeline 1 and a fourth normally open valve is arranged in the second oil discharge pipeline 1, the output end of the controller also needs to be connected with the control end of the third electric normally open valve 17 and the control end of the fourth electric normally open valve.

[0052] This implementation scheme provides an oil-fire separation method applicable to the above safety transformer. The specific steps of the method are as follows:

[0053] Receive the signals sent by the heavy gas trip, the fire signal detection device and the transformer incoming line switch trip in real time; when receiving two or more abnormal signals, control the oil discharge pump in the first oil discharge pipeline to work, and at the same time control the first electric normally closed valve in the first oil discharge pipeline to open to discharge the oil in the transformer body; after the first oil discharge pipeline discharges oil, close the channel between the transformer body and the oil conservator, control the second electric normally closed valve in the second oil discharge pipeline to open to discharge the oil in the oil conservator; after the second oil discharge pipeline discharges oil, control the nitrogen filling device to open and introduce nitrogen into the transformer; until the oil level in the transformer body and the oil level in the oil conservator are lower than the set threshold, control the first electric normally closed valve in the first oil discharge pipeline and the second electric normally closed valve in the second oil discharge pipeline to close respectively.

[0054] As a further improvement of the scheme, monitor the fault conditions of the first electric normally closed valve in the first oil discharge pipeline and the second electric normally closed valve in the second oil discharge pipeline in real time; when the first electric normally closed valve in the first oil discharge pipeline fails, manually open / close the first manually normally closed valve; when the second electric normally closed valve in the second oil discharge pipeline fails, manually open / close the second manually normally closed valve.

[0055] The oil discharge process of the above-mentioned safety intelligent transformer will be described in more detail below: First, the heavy gas trip, fire alarm signal detection device installed on the transformer body and the transformer incoming line switch trip send signals to the controller. When the controller receives more than two signals, the controller sends control signals to the oil discharge pump and the first normally closed electric valve in the first oil discharge pipeline, so that the oil discharge pump starts to work and the first normally closed electric valve is opened. At this time, the oil in the transformer body is discharged through the first oil discharge pipeline under the action of the oil discharge pump. After the first oil discharge pipeline has discharged oil for 10 seconds, the channel between the transformer body and the oil conservator is closed, and the second normally closed electric valve 21 is opened through the controller. At this time, the oil in the oil conservator is discharged through the second oil discharge pipeline. After the first oil discharge pipeline has discharged oil for 15 seconds, the controller controls the nitrogen filling device to start and fills nitrogen into the transformer. When the oil in the transformer is discharged to the oil level set by the oil level gauge, the oil level gauge sends a signal to the controller, so that the controller controls the first normally open electric valve and the second normally open electric valve to close, and the oil discharge work ends. When the first normally closed electric valve and the second normally closed electric valve fail and cannot be opened normally, the first manually operated normally closed valve and the second manually operated normally closed valve on the first branch and the second branch can be opened, so that the oil in the transformer can be discharged smoothly. When the first normally open electric valve and the second normally open electric valve cannot be closed normally, the oil discharge work can be stopped by closing the first manually operated normally open valve and the second manually operated normally open valve. If the first manually operated normally open valve in the first oil discharge pipeline still cannot be closed, the third normally open electric valve and the third manually operated normally open valve downstream of it can be closed to stop the oil discharge in the first oil discharge pipeline. If the second manually operated normally open valve in the second oil discharge pipeline does not work, a similar treatment method to that of the first oil discharge pipeline can also be used.

[0056] For the above-mentioned safety intelligent transformer, by setting the previously mentioned rapid oil-fire separation device, the oil in the transformer body and the oil conservator can be quickly discharged. When the transformer catches fire, the oil in the transformer can be quickly discharged, realizing oil-fire separation, preventing the fire from spreading and avoiding explosion, thus ensuring the personal safety of the staff and reducing economic losses. The safety intelligent transformer fills nitrogen into the transformer through the nitrogen filling device, which can effectively control the spread of the fire and prevent the fire from expanding, thereby improving safety. In addition, by setting the first branch with a normally closed valve, the second branch with a second manually operated normally closed valve, as well as the third manually operated normally open valve and the fourth manually operated normally open valve, it is ensured that the safety intelligent transformer can cope with sudden failures, enabling the safety intelligent transformer to operate safely and stably, and further improving safety.

[0057] Other embodiments of the present invention will be readily apparent to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following the general principles of the invention and including known common general knowledge or conventional technical means in the technical field not disclosed herein. The specification and examples are only illustrative, and the true scope and spirit of the invention are pointed out by the following claims.

[0058] It should be understood that the present invention is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A method for separating oil and fire of a transformer, using a safe and intelligent transformer, characterized in that, The described safety intelligent transformer includes: a transformer body (A), an oil conservator (B), a nitrogen filling device (C), a rapid oil-fire separation device (D), and a controller; On the transformer body (A), there are installed a sudden pressure relay trip, a fire alarm signal detection device, a transformer incoming line switch trip, and an oil level gauge; The oil conservator (B) is communicated with the oil storage chamber of the transformer body (A); The gas outlet of the nitrogen filling device (C) is communicated with the oil storage chamber of the transformer body (A); The rapid oil-fire separation device (D) is a rapid oil-fire separation device, which includes: a first oil discharge pipeline (1) and a second oil discharge pipeline (2); The oil inlet end of the first oil discharge pipeline (1) is connected and communicated with the oil storage chamber of the transformer body. Along the axial direction of the first oil discharge pipeline (1), a manual valve (11), an oil discharge pump (12), a first normally closed electric valve (13), a first normally open electric valve (14), and a first manually operated normally open valve (15) are sequentially arranged from the oil inlet end to the oil outlet end. A first branch (16) communicated with the first oil discharge pipeline (1) is connected in parallel at both ends of the first normally closed electric valve (13), and a first manually operated normally closed valve (161) is arranged on the first branch (16); The oil inlet end of the second oil discharge pipeline (2) is connected and communicated with the bottom of the oil conservator. Along the axial direction of the second oil discharge pipeline (2), a second normally closed electric valve (21), a second normally open electric valve (22), and a second manually operated normally open valve (23) are sequentially arranged from the oil inlet end to the oil outlet end. A second branch (24) communicated with the second oil discharge pipeline (2) is connected in parallel at both ends of the second normally closed electric valve (21), and a second manually operated normally closed valve (241) is arranged on the second branch (24); The input end of the controller is respectively connected with the output ends of the sudden pressure relay trip, the fire alarm signal detection device, the transformer incoming line switch trip, and the oil level gauge. The output end of the controller is respectively connected with the control ends of the nitrogen filling device (C), the oil discharge pump (12), the first normally closed electric valve (13), the first normally open electric valve (14), the second normally closed electric valve (21), and the second normally open electric valve (22); The specific steps of the transformer oil-fire separation method are as follows: Receive the signals sent by the sudden pressure relay trip, the fire alarm signal detection device, and the transformer incoming line switch trip in real time; When receiving two or more abnormal signals, control the oil discharge pump in the first oil discharge pipeline to work, and at the same time control the first normally closed electric valve in the first oil discharge pipeline to open to discharge the oil in the transformer body; After the first oil discharge pipeline discharges oil, close the channel between the transformer body and the oil conservator, control the second normally closed electric valve in the second oil discharge pipeline to open to discharge the oil in the oil conservator; After the second oil discharge pipeline discharges oil, control the nitrogen filling device to open and introduce nitrogen into the transformer; When the oil displacement in the transformer body and the oil level in the conservator are lower than the set thresholds, respectively control the first normally-closed electric valve in the first oil discharge pipeline and the second normally-closed electric valve in the second oil discharge pipeline to close.

2. The method for separating transformer oil from fire according to claim 1, wherein Monitor the fault conditions of the first normally-closed electric valve in the first oil discharge pipeline and the second normally-closed electric valve in the second oil discharge pipeline in real time; When the first normally-closed electric valve in the first oil discharge pipeline fails, manually open / close the first normally-closed manual valve; When the second normally-closed electric valve in the second oil discharge pipeline fails, manually open / close the second normally-closed manual valve.

3. The transformer oil fire separation method according to claim 1, characterized in that, The first normally-closed electric valve (13) is composed of two serially-connected normally-closed electric valves.

4. The transformer oil fire separation method according to claim 1, characterized in that, The first normally-closed manual valve (161) is composed of two serially-connected normally-closed manual valves.

5. The method for separating oil and fire of a transformer according to claim 1, characterized in that, The second normally-closed electric valve (21) is composed of two serially-connected normally-closed electric valves.

6. The transformer oil fire separation method according to claim 1, characterized in that, The second normally-closed manual valve (241) is composed of two serially-connected normally-closed manual valves.

7. The method for separating transformer oil by fire according to claim 1, characterized in that, Downstream of the first normally-open electric valve (14) and the first normally-open manual valve (15) in the first oil discharge pipeline (1), a third normally-open electric valve (17) and a third normally-open manual valve (18) are also arranged at intervals; Downstream of the second normally-open electric valve (22) and the second normally-open manual valve (23) in the second oil discharge pipeline (2), a fourth normally-open electric valve and a fourth normally-open manual valve are also arranged at intervals.

Images