CN211555615U - Oil-immersed transformer explosion-proof and fire-proof device convenient for replacing rupture disk - Google Patents
Oil-immersed transformer explosion-proof and fire-proof device convenient for replacing rupture disk Download PDFInfo
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- CN211555615U CN211555615U CN202020373196.XU CN202020373196U CN211555615U CN 211555615 U CN211555615 U CN 211555615U CN 202020373196 U CN202020373196 U CN 202020373196U CN 211555615 U CN211555615 U CN 211555615U
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Abstract
The utility model discloses an explosion-proof firebreak device of oil-immersed transformer convenient to change rupture disk, including transformer tank, explosion-proof pressure relief device and switch board, the fixed conservator that is provided with in transformer tank top, be in pipe connection between conservator and the transformer tank, the pipeline middle part is switched on there are gas relay and cutoff valve, the fixed a plurality of detectors that are used for surveying the temperature that are provided with in transformer tank top. The utility model can avoid the transformer from exploding under the condition of overpressure by arranging the explosion-proof membrane, and can extinguish fire immediately after the device is started by utilizing nitrogen for fire extinguishing and cooling, thereby effectively preventing the fire from spreading and reburning; through mechanical design, the pressure in the inner cavity of the transformer can be reduced without depending on an external trigger, and even under the condition that a power station voltage source fails, the transformer protector can still work normally.
Description
Technical Field
The utility model relates to a transformer fire control technical field, in particular to explosion-proof fire prevention device of oil-immersed transformer convenient to change rupture disk.
Background
The oil immersed transformer (hereinafter referred to as transformer) causes internal arcing due to short circuit, overvoltage and the like, so that oil products are ionized and various combustible gases are decomposed; once the internal overpressure causes the explosion and the rupture of the oil tank, oxygen enters, and a fire disaster is caused immediately when the oil tank meets open fire; at the same time, these substances may spread the fire to nearby devices, where the fire will spread rapidly and explode, creating a significant hazard. After the pressure inside the oil tank begins to increase, the transformer usually explodes within 5-50 milliseconds, so that the short circuit of the transformer is very destructive;
the patent number that this company was previously applied for is CN201721111857.6, and the name is transformer fire prevention explosion-proof safety arrangement, through being provided with the decompression chamber, decompression chamber one side intercommunication has explosion-proof diaphragm, utilizes explosion-proof diaphragm's mechanical principle to carry out the pressure release to reach the purpose of quick step-down.
However, in the using process, because the rupture disk has a short service life and belongs to the field of fire-fighting appliances, the rupture disk needs to be periodically overhauled and replaced, the existing installation structure is complex, as shown in fig. 1, the rupture disk 7 ' is fixed between the decompression chamber 6 ' and the side wall fixing tube 20 ' of the transformer box body through a plurality of bolts, and the disassembly is complex.
Therefore, it is necessary to provide an explosion-proof and fire-proof device for an oil-immersed transformer, which facilitates replacement of rupture discs.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an explosion-proof firebreak device of oil-immersed transformer convenient to change rupture disk to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: an explosion-proof and fire-proof device of an oil-immersed transformer convenient for replacing rupture disks comprises a transformer oil tank, an explosion-proof and pressure-reducing device and a control cabinet, wherein an oil conservator is fixedly arranged at the top end of the transformer oil tank and is connected with the transformer oil tank through a pipeline, a gas relay and a cut-off valve are communicated with the middle part of the pipeline, and a plurality of detectors for detecting temperature are fixedly arranged at the top end of the transformer oil tank;
the explosion-proof pressure relief device comprises a decompression chamber, a rupture disc and an oil-gas separator, wherein an oil inlet pipe and a plurality of limiting rods are arranged at the end part of the decompression chamber, the limiting rods are uniformly distributed at the end part of the decompression chamber in an annular shape, a first supporting frame and a second supporting frame are fixedly arranged on the side wall of the transformer oil tank, the decompression chamber is fixedly arranged at the top end of the first supporting frame, a first clamping pipe and a second clamping pipe are respectively and fixedly arranged at the two sides of the rupture disc, a groove is formed at the end part of the first clamping pipe, a plurality of springs are fixedly arranged in the groove, a movable ring block is fixedly connected at one end of each spring, a limiting ring block is arranged on the surface of the first clamping pipe, a plurality of through holes are formed in the surface of the limiting ring block, a protruding ring block is arranged at the end part of the second, the surface of the end part of the fixed pipe is provided with an external thread, the surface of the fixed pipe is in threaded connection with a nut, one end of the fixed pipe is communicated with a transformer oil tank, the surface of the end part of the second clamping pipe is provided with an external thread, and the second clamping pipe is fixedly connected with the fixed pipe through the nut;
the utility model discloses a transformer oil tank, decompression chamber, oil extraction pipe and oil and gas separator, oil and gas separator one side fixed mounting has the nitrogen filling cabinet, the nitrogen filling cabinet top is led to respectively has first nitrogen filling pipe and second nitrogen filling pipe, the first nitrogen filling pipe other end is led to with the transformer oil tank mutually, the second nitrogen filling pipe other end is led to with oil and gas separator mutually, nitrogen filling cabinet inside is provided with and is filled nitrogen extinguishing device, fill nitrogen extinguishing device and first nitrogen filling pipe and second nitrogen filling pipe and switch on mutually.
Preferably, one side of the movable ring block is provided with a sealing gasket, and the surface of the movable ring block is sleeved with a sealing ring.
Preferably, the bottom end of the oil-gas separator is provided with a sewage draining outlet, the top end of the oil-gas separator is communicated with an exhaust pipe, and the end part of the exhaust pipe is fixedly connected with a one-way valve.
Preferably, the two sides of the transformer oil tank are provided with nitrogen inlet pipes, and the nitrogen inlet pipes are communicated with the first nitrogen charging pipes through the shunt assemblies.
Preferably, the blocking valve is arranged between the gas relay and the pipeline of the oil conservator.
Preferably, install the control unit in the switch board, the control unit includes the singlechip, the detector all with singlechip input electric connection, the switching of nitrogen extinguishing device is filled in singlechip output control.
Preferably, the end parts of the limiting rods on the upper side and the lower side of the end part of the decompression chamber are provided with placing holes, and pin shafts are inserted into the placing holes.
The utility model discloses a technological effect and advantage:
1. the utility model is provided with the first clamping tube and the second clamping tube, when the rupture disk is installed, the first clamping tube is inserted along the limiting rod, the first clamping tube is pushed to one side of the decompression chamber, the pin shaft is inserted into the placing hole, in the process, the end part of the first clamping tube is sleeved on the end part surface of the oil inlet tube of the decompression chamber, the spring is extruded to drive the movable ring block to cling to the end part of the oil inlet tube, the first clamping tube can be hermetically connected with the decompression chamber due to the arrangement of the sealing gasket and the sealing ring, simultaneously, the deformation space of the spring is utilized to lead the protruding ring block at the end part of the second clamping tube to be inserted into the fixed tube, and under the pushing of the spring force, the sealing gasket on the surface of the protruding ring block clings to the end part surface of the fixed tube, at the moment, only the nut needs to be screwed, the second clamping tube and the fixed tube can be, the service life of the device is prolonged, and accidents are effectively avoided.
2. The utility model can avoid the transformer from exploding under the condition of overpressure by arranging the explosion-proof membrane, and can extinguish fire immediately after the device is started by utilizing nitrogen for fire extinguishing and cooling, thereby effectively preventing the fire from spreading and reburning;
3. the explosion-proof and fire-proof protection device of the transformer can reduce the pressure in the inner cavity of the transformer without depending on an external trigger through mechanical design, even if the voltage source of a power station fails, the protector of the transformer can still work normally, the design of the explosion-proof and fire-proof protection device eliminates unnecessary decompression, because the safety protection device can be started only when the internal pressure of a transformer oil tank exceeds an action point set by an explosion-proof membrane;
4. the occupied area is small, the civil engineering workload is small, the structure is compact, and the design, site selection and installation are easy;
5. the water source is not needed, the device is not limited by geographical conditions, the environment is not polluted, and the device can be used indoors and outdoors; the used medium is cheap and easy to supplement and purchase; the operation and maintenance are convenient, and the reliability is good.
Drawings
Fig. 1 is a schematic view of a conventional rupture disk mounting structure.
Fig. 2 is a schematic view of the overall structure of the present invention.
Fig. 3 is an enlarged view of a portion a of fig. 1 according to the present invention.
Fig. 4 is an expanded view of the structure of the part B in fig. 1 according to the present invention.
Fig. 5 is a schematic cross-sectional view of the B-portion structure of fig. 1 according to the present invention in a use state.
Fig. 6 is an enlarged view of the portion C in fig. 3 according to the present invention.
In the figure: 1 transformer oil tank, 2 conservators, 3 gas relays, 4 stop valves, 5 detectors, 6 decompression chambers, 7 rupture discs, 8 oil-gas separators, 9 oil inlet pipes, 10 limiting rods, 11 first supporting frames, 12 second supporting frames, 13 first clamping pipes, 14 second clamping pipes, 15 grooves, 16 springs, 17 movable ring blocks, 18 limiting ring blocks, 19 protruding ring blocks, 20 fixed pipes, 21 nuts, 22 oil discharge pipes, 23 nitrogen charging cabinets, 24 first nitrogen charging pipes, 25 second nitrogen charging pipes, 26 sewage outlets, 27 exhaust pipes and 28 nitrogen inlet pipes.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides an oil immersed transformer explosion-proof and fire-proof device convenient for replacing rupture disk as shown in figures 2-6, which comprises a transformer oil tank 1, an explosion-proof and pressure-reducing device and a control cabinet, wherein the top end of the transformer oil tank 1 is fixedly provided with an oil conservator 2, the oil conservator 2 is connected with the transformer oil tank 1 through a pipeline, the middle part of the pipeline is communicated with a gas relay 3 and a cut-off valve 4, and the top end of the transformer oil tank 1 is fixedly provided with a plurality of detectors 5 for detecting temperature;
the explosion-proof pressure reducing device comprises a pressure reducing chamber 6, a rupture disk 7 and an oil-gas separator 8, wherein an oil inlet pipe 9 and a plurality of limiting rods 10 are arranged at the end part of the pressure reducing chamber 6, the limiting rods 10 are uniformly distributed at the end part of the pressure reducing chamber 6 in an annular shape, a first supporting frame 11 and a second supporting frame 12 are fixedly arranged on the side wall of the transformer oil tank 1, the pressure reducing chamber 6 is fixedly arranged at the top end of the first supporting frame 11, a first clamping pipe 13 and a second clamping pipe 14 are respectively and fixedly arranged at the two sides of the rupture disk 7, a groove 15 is formed in the end part of the first clamping pipe 13, a plurality of springs 16 are fixedly arranged in the groove 15, one ends of the springs 16 are fixedly connected with movable ring blocks 17, a limiting ring block 18 is arranged on the surface of the first clamping pipe 13, a plurality of through holes are formed in the surface of the limiting ring block 18, a protruding ring block 19, a fixed pipe 20 is fixedly arranged at the top end of the second support frame 12, an external thread is arranged on the surface of the end part of the fixed pipe 20, a nut 21 is connected to the surface of the fixed pipe 20 in a threaded manner, one end of the fixed pipe 20 is communicated with the transformer oil tank 1, an external thread is arranged on the surface of the end part of the second clamping pipe 14, and the second clamping pipe 14 is fixedly connected with the fixed pipe 20 through the nut 21;
the switch-on of 6 one end in decompression chamber has row oil pipe 22, arrange oil pipe 22 and oil and gas separator 8 and put through mutually, 8 one side fixed mounting of oil and gas separator has nitrogen charging cabinet 23, nitrogen charging cabinet 23 top is led to respectively has first nitrogen charging pipe 24 and second nitrogen charging pipe 25, the first nitrogen charging pipe 24 other end and transformer tank 1 put through mutually, the second nitrogen charging pipe 25 other end and oil and gas separator 8 put through mutually, nitrogen charging cabinet 23 inside is provided with nitrogen-charging extinguishing device, nitrogen-charging extinguishing device and first nitrogen charging pipe 24 and second nitrogen charging pipe 25 put through mutually.
Further, in the above technical solution, a sealing gasket is arranged on one side of the movable ring block 17, and a sealing ring is sleeved on the surface of the movable ring block 17;
further, in the above technical scheme, a sewage draining outlet 26 is formed at the bottom end of the oil-gas separator 8, an exhaust pipe 27 is communicated with the top end of the oil-gas separator, and a check valve is fixedly connected to the end of the exhaust pipe 27;
further, in the above technical scheme, both sides of the transformer oil tank 1 are provided with a nitrogen inlet pipe 28, and the nitrogen inlet pipe 28 is communicated with the first nitrogen charging pipe 24 through a shunt assembly;
further, in the above technical solution, the cut-off valve 4 is disposed between the gas relay 3 and the pipeline of the conservator 2, and its main function is to cut off the oil supply channel from the conservator 2 to the oil tank when the oil tank breaks a large amount of abnormal oil flow such as oil spill, so as to avoid the risk;
further, in the above technical scheme, a control unit is installed in the control cabinet, the control unit includes a single chip microcomputer, the detector 5 and the pressure sensor are both electrically connected with an input end of the single chip microcomputer, and an output end of the single chip microcomputer controls the nitrogen-filled fire extinguishing device to be opened and closed;
further, the detector 5 is a temperature detector 5, the model of the temperature detector is WRM-101, and the model of the single chip microcomputer is 80C 51.
Furthermore, in the above technical scheme, the end portions of the limiting rods 10 on the upper and lower sides of the end portion of the decompression chamber 6 are provided with placing holes, pin shafts are inserted into the placing holes, and the pin shafts can play a role in preliminary fixing.
This practical theory of operation:
referring to the attached drawings 2-3 of the specification, when accidents such as short circuit, overvoltage and the like occur to the transformer, internal arcing can be caused, oil products are ionized and various combustible gases are decomposed, the internal pressure of the transformer oil tank 1 is increased to cause overpressure at the moment, when the internal pressure of the transformer oil tank 1 exceeds the action point of the explosion-proof membrane, the explosion-proof membrane can be completely broken within a few milliseconds, the transformer can be prevented from exploding under the overpressure condition, in the process, a pressure sensor in a decompression chamber 6 detects that the pressure is changed greatly and transmits a signal to a single chip microcomputer, meanwhile, a detector 5 detects that the temperature at the top end of the transformer oil tank 1 exceeds a preset temperature, an overtemperature signal is sent to the single chip microcomputer, the output end of the single chip microcomputer controls a nitrogen-filled fire extinguishing device to be opened, and the nitrogen-filled gas separator can, the nitrogen can directly stop the generation of explosive gas, and balance the oil temperature, thereby avoiding the fire in the transformer oil tank 1.
Referring to the attached drawings 4-6 of the specification, by arranging the first clamping tube 13 and the second clamping tube 14, when installing the rupture disk 7, only the first clamping tube 13 needs to be inserted along the limiting rod 10, the first clamping tube 13 is pushed to one side of the decompression chamber 6, and the pin 29 is inserted into the placing hole, in the process, the end part of the first clamping tube 13 is sleeved on the end part surface of the oil inlet tube 9 of the decompression chamber 6, the spring 16 is extruded to drive the movable ring block 17 to cling to the end part of the oil inlet tube 9, the first clamping tube 13 and the decompression chamber 6 can be hermetically connected due to the arrangement of the sealing gasket and the sealing ring, simultaneously, the convex ring block 19 at the end part of the second clamping tube 14 is inserted into the fixed tube 20 by utilizing the deformation space of the spring 16, the sealing gasket on the surface of the convex ring block 19 clings to the end part surface of the fixed tube 20 under the pushing of the elastic force of the spring 16, at this time, the second clamping tube 14 and the, simple installation and good sealing performance.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (7)
1. The utility model provides an explosion-proof firebreak device of oil-immersed transformer convenient to change rupture disk, includes transformer tank (1), explosion-proof pressure relief device and switch board, its characterized in that: an oil conservator (2) is fixedly arranged at the top end of the transformer oil tank (1), the oil conservator (2) is connected with the transformer oil tank (1) through a pipeline, a gas relay (3) and a cut-off valve (4) are communicated with the middle of the pipeline, and a plurality of detectors (5) used for detecting temperature are fixedly arranged at the top end of the transformer oil tank (1);
the explosion-proof pressure reducing device comprises a pressure reducing chamber (6), a rupture disk (7) and an oil-gas separator (8), wherein the end part of the pressure reducing chamber (6) is provided with an oil inlet pipe (9) and a plurality of limiting rods (10), the limiting rods (10) are uniformly distributed at the end part of the pressure reducing chamber (6) in an annular shape, the side wall of the transformer oil tank (1) is fixedly provided with a first supporting frame (11) and a second supporting frame (12), the pressure reducing chamber (6) is fixedly arranged at the top end of the first supporting frame (11), two sides of the rupture disk (7) are respectively and fixedly provided with a first clamping pipe (13) and a second clamping pipe (14), the end part of the first clamping pipe (13) is provided with a groove (15), a plurality of springs (16) are fixedly arranged in the groove (15), one end of each spring (16) is fixedly connected with a movable ring block (17), the surface of the first clamping pipe (13), the surface of the limiting ring block (18) is provided with a plurality of through holes, the end part of the second clamping pipe (14) is provided with a protruding ring block (19), the surface of the protruding ring block (19) is sleeved with a sealing gasket, the top end of the second support frame (12) is fixedly provided with a fixed pipe (20), the surface of the end part of the fixed pipe (20) is provided with an external thread, the surface of the fixed pipe (20) is in threaded connection with a nut (21), one end of the fixed pipe (20) is communicated with the transformer oil tank (1), the surface of the end part of the second clamping pipe (14) is provided with an external thread, and the second clamping pipe (14) is fixedly connected with the fixed pipe (20) through the nut (21;
decompression chamber (6) one end switch-on has oil extraction pipe (22), oil extraction pipe (22) and oil and gas separator (8) switch-on mutually, oil and gas separator (8) one side fixed mounting has nitrogen charging cabinet (23), nitrogen charging cabinet (23) top is switched on respectively has first nitrogen charging pipe (24) and second nitrogen charging pipe (25), first nitrogen charging pipe (24) other end and transformer tank (1) switch-on mutually, the second nitrogen charging pipe (25) other end and oil and gas separator (8) switch-on mutually, nitrogen charging cabinet (23) inside is provided with nitrogen charging extinguishing device, nitrogen charging extinguishing device and first nitrogen charging pipe (24) and second nitrogen charging pipe (25) switch-on mutually.
2. The oil-filled transformer explosion-proof and fire-proof device convenient for replacing rupture discs of claim 1, wherein: one side of the movable ring block (17) is provided with a sealing gasket, and a sealing ring is sleeved on the surface of the movable ring block (17).
3. The oil-filled transformer explosion-proof and fire-proof device convenient for replacing rupture discs of claim 1, wherein: the oil-gas separator (8) bottom is seted up drain (26), and its top switch-on has blast pipe (27), blast pipe (27) tip fixedly connected with check valve.
4. The oil-filled transformer explosion-proof and fire-proof device convenient for replacing rupture discs of claim 1, wherein: both sides of the transformer oil tank (1) are provided with a nitrogen inlet pipe (28), and the nitrogen inlet pipe (28) is communicated with the first nitrogen charging pipe (24) through a shunt assembly.
5. The oil-filled transformer explosion-proof and fire-proof device convenient for replacing rupture discs of claim 1, wherein: the stop valve (4) is arranged between the gas relay (3) and the pipeline of the oil conservator (2).
6. The oil-filled transformer explosion-proof and fire-proof device convenient for replacing rupture discs of claim 1, wherein: install the control unit in the switch board, the control unit includes the singlechip, detector (5) all with singlechip input electric connection, the switching of nitrogen extinguishing device is filled in singlechip output control.
7. The oil-filled transformer explosion-proof and fire-proof device convenient for replacing rupture discs of claim 1, wherein: the end parts of the limiting rods (10) on the upper side and the lower side of the end part of the decompression chamber (6) are provided with placing holes, and pin shafts are inserted into the placing holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020373196.XU CN211555615U (en) | 2020-03-23 | 2020-03-23 | Oil-immersed transformer explosion-proof and fire-proof device convenient for replacing rupture disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020373196.XU CN211555615U (en) | 2020-03-23 | 2020-03-23 | Oil-immersed transformer explosion-proof and fire-proof device convenient for replacing rupture disk |
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| CN211555615U true CN211555615U (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020373196.XU Active CN211555615U (en) | 2020-03-23 | 2020-03-23 | Oil-immersed transformer explosion-proof and fire-proof device convenient for replacing rupture disk |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781905A (en) * | 2020-12-31 | 2021-05-11 | 北京中瑞和电气有限公司 | Arc discharge explosion-proof test device in transformer oil |
| CN116092779A (en) * | 2023-04-11 | 2023-05-09 | 保定中亿电气集团有限公司 | Oil immersed transformer and explosion-proof protection structure |
-
2020
- 2020-03-23 CN CN202020373196.XU patent/CN211555615U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781905A (en) * | 2020-12-31 | 2021-05-11 | 北京中瑞和电气有限公司 | Arc discharge explosion-proof test device in transformer oil |
| CN112781905B (en) * | 2020-12-31 | 2022-12-16 | 北京中瑞和电气有限公司 | Arc discharge explosion-proof test device in transformer oil |
| CN116092779A (en) * | 2023-04-11 | 2023-05-09 | 保定中亿电气集团有限公司 | Oil immersed transformer and explosion-proof protection structure |
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