CN211237914U - Fireproof transformer - Google Patents
Fireproof transformer Download PDFInfo
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- CN211237914U CN211237914U CN201922095971.XU CN201922095971U CN211237914U CN 211237914 U CN211237914 U CN 211237914U CN 201922095971 U CN201922095971 U CN 201922095971U CN 211237914 U CN211237914 U CN 211237914U
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Abstract
The utility model provides a fireproof transformer, belonging to the technical field of transformers, comprising an oil tank, a transformer body arranged in the oil tank, and a tank cover arranged at the top of the oil tank and hermetically connected with the oil tank; mineral oil is filled in the middle lower part of a cavity enclosed by the oil tank and the tank cover, an air gap layer is formed between the liquid level of the mineral oil and the tank cover, and flame-retardant gas is filled in the air gap layer; the flame-retardant gas is nitrogen; the oil tank adopts a tank edge welded structure; the liquid level of the mineral oil is higher than the top surface of the transformer body. The utility model provides a fire prevention type transformer can effectively carry out the separation with the outside air with the mineral oil that is located the oil tank, when the transformer takes place electric and hot trouble, can avoid mineral oil to participate in the burning, and then has prevented that the oil tank is inside to be fired, has improved the fire behavior of transformer.
Description
Technical Field
The utility model belongs to the technical field of the transformer, more specifically say, relate to a fire prevention type transformer.
Background
The class-a insulated oil-immersed transformer generally uses mineral oil as an insulating and cooling medium, and the mineral oil has the advantages of excellent electrical performance and good cooling effect, but also has the disadvantages. In the process of implementing the present invention, the inventor finds that there are at least the following problems in the prior art: the mineral oil has a low ignition point, and when the transformer has electrical and thermal faults, the mineral oil cannot play a role in fire prevention and flame retardance, can support combustion when falling down, further enlarges the faults and has poor fire resistance.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide a fire prevention type transformer aims at solving the poor technical problem of present oil-immersed transformer fire behavior.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is: provided is a fire-protected transformer, including: an oil tank;
the transformer body is arranged in the oil tank; and
the tank cover is arranged at the top of the oil tank and is in sealed connection with the oil tank;
mineral oil is filled in the middle lower portion of a cavity defined by the oil tank and the tank cover, an air gap layer is formed between the liquid level of the mineral oil and the tank cover, and flame-retardant gas is filled in the air gap layer.
As another example herein, the flame retardant gas is nitrogen.
As another embodiment of the application, the oil tank adopts a tank edge welded structure.
As another embodiment of the present application, the liquid level of the mineral oil is higher than the top surface of the transformer body.
As another embodiment of the present application, the method further includes:
the input end of the inflation tube is provided with a valve, and the output end of the inflation tube is communicated with the air gap layer.
As another embodiment of the present application, the output end of the gas filling pipe passes through the box cover to be communicated with the air gap layer.
As another embodiment of the present application, the flameproof transformer further includes:
and the inflation device is arranged on the oil tank, is communicated with the input end of the inflation tube and is used for supplying flame-retardant gas into the air gap layer.
As another embodiment of the present application, the flameproof transformer further includes:
the air pressure detection device is arranged on the oil tank or the tank cover and is used for detecting the air pressure in the air gap layer; the air pressure detection device is connected with an external display device.
As another embodiment of the present application, the valve is a solenoid valve.
As another embodiment of the present application, the flameproof transformer further includes:
the control device is electrically connected with the air pressure detection device and the valve respectively; the control device controls whether the inflation device inflates air into the air gap layer or not through the air pressure in the air gap layer.
One of the above technical solutions has the following beneficial effects: compared with the prior art, the oil tank has the advantages that the air gap layer with a certain height is arranged at the upper part of the oil tank, the flame-retardant gas is filled in the air gap layer, an oil storage cabinet of the oil-immersed transformer in the prior art is omitted, and the volume change of the mineral oil is responded through the air gap space at the upper part of the oil tank during use. Therefore, the flame-retardant gas in the air gap layer can effectively separate the mineral oil in the oil tank from the outside air, and when the transformer has electrical and thermal faults, the mineral oil can be prevented from participating in combustion, so that the fire in the oil tank is prevented, and the fireproof performance of the transformer is improved. In addition, the technical scheme responds to the volume change of the mineral oil through the air gap space, effectively reduces the oil consumption of the transformer in use and saves materials.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a fireproof transformer according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a control structure according to an embodiment of the present invention.
In the figure: 10. an oil tank; 20. a box cover; 30. mineral oil; 40. an air gap layer; 50. an inflation tube; 60. an inflator; 70. an air pressure detecting device; 80. a control device; 90. and (4) a valve.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, a fireproof transformer according to an embodiment of the present invention will be described. The fire-proof transformer comprises an oil tank 10, a transformer body arranged in the oil tank 10, and a tank cover 20 arranged at the top of the oil tank 10 and hermetically connected with the oil tank 10.
The embodiment of the utility model provides a fire prevention type transformer compares with prior art, has set up the air gap layer 40 of take the altitude on the upper portion of oil tank 10, is full of flame retardant gas in the air gap layer 40 to cancel the oil conservator of oil-immersed transformer among the prior art, through the volume change that is located the air gap space reply mineral oil 30 on oil tank 10 upper portion during the use. Thus, the flame-retardant gas in the air gap layer 40 can effectively isolate the mineral oil 30 in the oil tank 10 from the outside air, and when the transformer has electrical and thermal faults, the mineral oil 30 can be prevented from being burnt, so that the fire in the oil tank 10 is prevented, and the fireproof performance of the transformer is improved. In addition, the volume change of mineral oil 30 is responded to through the air gap space in the embodiment, the oil consumption when the transformer is used is effectively reduced, and materials are saved.
Further, a sealing ring is provided between the fuel tank 10 and the tank cover 20 to ensure a sealing connection therebetween, thereby preventing the flame-retardant gas from flowing into the air through a gap therebetween.
Further, the gas pressure in the air gap layer 40 is greater than the atmospheric pressure, so that air is effectively prevented from entering the air gap layer 40 through a gap between the tank cover 20 and the oil tank 10, and the good fireproof performance of the transformer is further ensured.
As a specific implementation manner of the fireproof transformer provided by the utility model, the flame-retardant gas is nitrogen.
The nitrogen is widely present in the atmosphere, the purchase cost is lower than that of other flame-retardant gases, and the nitrogen can not cause environmental pollution when being diffused into the air. The flame-retardant gas adopts nitrogen, and meets the use requirement.
Further, the nitrogen gas is high-purity dry nitrogen gas.
As a specific embodiment of the fireproof transformer provided by the present invention, the oil tank 10 adopts a tank edge welding structure.
The oil tank 10 adopts a tank edge welding structure, so that good air tightness is guaranteed, and the phenomenon that the mineral oil 30 overflows from a connecting seam between the upper oil tank 10 and the lower oil tank 10 in the use process is avoided.
As a specific embodiment of the fireproof transformer provided by the present invention, the liquid level of the mineral oil 30 is higher than the top surface of the transformer body.
The liquid level of the mineral oil 30 is higher than the top surface of the transformer body, so that the transformer body is completely positioned in the mineral oil 30, the transformer body is ensured to be positioned in a good insulation and cooling environment, and the service life and the working performance of the transformer are ensured not to be influenced by the arrangement of the air gap layer 40.
Referring to fig. 1, as a specific embodiment of the fireproof transformer of the present invention, the fireproof transformer further includes an air tube 50, an input end of the air tube 50 is provided with a valve 90, and an output end of the air tube is communicated with the air gap layer 40.
When the gas-filled tank cover is used, the tank cover 20 can be firstly installed on the oil tank 10, then the air in the air gap layer 40 is pumped out, and then the flame-retardant gas is filled into the air gap layer 40 through the gas filling pipe 50. During normal use, the air gap layer 40 can be supplemented with flame-retardant gas regularly through the inflation tube 50 to cope with the volume change of the mineral oil 30, so that the air pressure in the air gap layer 40 is always higher than the atmospheric pressure, and air is prevented from entering the air gap layer 40 through a possible gap between the tank cover 20 and the oil tank 10.
Referring to fig. 1, as an embodiment of the fireproof transformer of the present invention, an output end of the gas tube 50 passes through the box cover 20 and communicates with the air gap layer 40.
The gas-filled tube 50 passes through the tank cover 20 and is communicated with the air gap layer 40, so that the mineral oil 30 in the oil tank 10 is not affected by the filling of the flame-retardant gas, and the normal use of the transformer is not affected.
Referring to fig. 1, as a specific embodiment of the fire-proof transformer of the present invention, the fire-proof transformer further includes an inflator 60 disposed on the oil tank 10, and the inflator 60 is communicated with an input end of the gas tube 50 for supplying a flame-retardant gas into the air gap layer 40.
The arrangement of the inflator 60 enables an operator to fill the flame-retardant gas into the air gap layer 40 without carrying the inflator 60 to the position of the transformer from other places, thereby effectively improving the convenience of the inflation operation.
The inflator 60 may be a gas bottle containing a flame-retardant gas or other commercially available device that supplements the flame-retardant gas into the air gap layer 40.
As a specific embodiment of the fire-proof transformer provided by the present invention, the fire-proof transformer further includes an air pressure detecting device 70 disposed on the oil tank 10 or the tank cover 20, the air pressure detecting device 70 is used for detecting air pressure in the air gap layer 40; the air pressure detecting device 70 is connected to an external display device.
The air pressure detecting device 70 can detect the air pressure in the air gap layer 40 in real time, and display the detection result through the display device, so that the operator can conveniently and accurately grasp the air pressure in the air gap layer 40, and then open the valve 90 on the inflation tube 50 in time after the pressure in the air gap layer 40 is reduced, so as to supplement the flame-retardant gas into the air gap layer 40.
Further, the air pressure detecting device 70 may be an air pressure meter, an air pressure sensor, or the like, and when the air pressure detecting device 70 is an air pressure meter, the display device is a dial of the air pressure meter. The display device may also be a display electrically connected to the air pressure detection device 70 for displaying the detection result of the air pressure detection device 70.
As a specific implementation manner of the fireproof transformer, the valve 90 is a solenoid valve, and is convenient to operate.
Referring to fig. 2, as a specific embodiment of the fire-proof transformer of the present invention, the fire-proof transformer further includes a control device 80 electrically connected to the air pressure detecting device 70 and the valve 90, respectively, and the control device 80 controls whether the air charging device 60 charges air into the air gap layer 40 through the air pressure in the air gap layer 40.
Before use, a threshold value is preset in the control system, and when the air pressure detection device 70 detects that the air pressure in the air gap layer 40 is lower than the threshold value, the control device 80 controls the valve 90 on the inflation tube 50 to open to supplement the flame-retardant gas into the air gap layer 40; when the air pressure detecting device 70 detects that the air pressure in the air gap layer 40 is higher than the threshold value, the control device 80 controls the valve 90 on the gas filling tube 50 to close, and the supply of the flame retardant gas into the air gap layer 40 is stopped.
Specifically, the air pressure detecting device 70 may be a commercially available air pressure sensor, such as BA5803, BP5607, BT5611, etc., and the control device 80 may be a single chip microcomputer, a programmable controller (e.g., S7-200224DC/DC), etc., as long as the above functions are achieved, and the solenoid valve may be 3V110M5 NOB.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Fire prevention type transformer, its characterized in that includes:
an oil tank;
the transformer body is arranged in the oil tank; and
the tank cover is arranged at the top of the oil tank and is in sealed connection with the oil tank;
mineral oil is filled in the middle lower portion of a cavity defined by the oil tank and the tank cover, an air gap layer is formed between the liquid level of the mineral oil and the tank cover, and flame-retardant gas is filled in the air gap layer.
2. A firesafe transformer according to claim 1, characterised in that: the flame retardant gas is nitrogen.
3. A firesafe transformer according to claim 1, characterised in that: the oil tank adopts a tank edge welded structure.
4. A firesafe transformer according to claim 1, characterised in that: the liquid level of the mineral oil is higher than the top surface of the transformer body.
5. A firesafe transformer according to any one of claims 1 to 4, further comprising:
the input end of the inflation tube is provided with a valve, and the output end of the inflation tube is communicated with the air gap layer.
6. A firesafe transformer according to claim 5, wherein: the output end of the inflation tube penetrates through the box cover to be communicated with the air gap layer.
7. The flameproof transformer of claim 5, further comprising:
and the inflation device is arranged on the oil tank, is communicated with the input end of the inflation tube and is used for supplying flame-retardant gas into the air gap layer.
8. The flameproof transformer of claim 7, further comprising:
the air pressure detection device is arranged on the oil tank or the tank cover and is used for detecting the air pressure in the air gap layer; the air pressure detection device is connected with an external display device.
9. A firesafe transformer according to claim 8, wherein: the valve is an electromagnetic valve.
10. A firesafe transformer according to claim 9, further comprising:
the control device is electrically connected with the air pressure detection device and the valve respectively; the control device controls whether the inflation device inflates air into the air gap layer or not through the air pressure in the air gap layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922095971.XU CN211237914U (en) | 2019-11-28 | 2019-11-28 | Fireproof transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922095971.XU CN211237914U (en) | 2019-11-28 | 2019-11-28 | Fireproof transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211237914U true CN211237914U (en) | 2020-08-11 |
Family
ID=71917912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922095971.XU Active CN211237914U (en) | 2019-11-28 | 2019-11-28 | Fireproof transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211237914U (en) |
-
2019
- 2019-11-28 CN CN201922095971.XU patent/CN211237914U/en active Active
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