CN114050030A - Oil protection box for power transformer - Google Patents
Oil protection box for power transformer Download PDFInfo
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- CN114050030A CN114050030A CN202111427745.2A CN202111427745A CN114050030A CN 114050030 A CN114050030 A CN 114050030A CN 202111427745 A CN202111427745 A CN 202111427745A CN 114050030 A CN114050030 A CN 114050030A
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- 238000000926 separation method Methods 0.000 claims abstract description 84
- 238000007789 sealing Methods 0.000 claims abstract description 57
- 239000012528 membrane Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000002274 desiccant Substances 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 6
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 6
- 239000001110 calcium chloride Substances 0.000 claims description 6
- 238000004880 explosion Methods 0.000 abstract description 6
- 230000009977 dual effect Effects 0.000 abstract description 2
- 238000005336 cracking Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 9
- 230000017525 heat dissipation Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses an oil protection box for a power transformer, which comprises a sealing bottom plate, wherein an oil-gas separation type pressure relief water removal device is arranged above the sealing bottom plate, and a conical convenient exhaust device is arranged on the sealing bottom plate. The invention utilizes the expansion and the temperature of the transformer oil to lead the air containing water vapor to be separated from the transformer oil through the dual oil-gas separation membrane, thereby removing the water in the transformer oil, and can lead the gas generated by the cracking of the transformer oil caused by the failure of the power transformer to be rapidly discharged in a large quantity through the use of the L-shaped emergency discharge pipe and the exhaust pipe, thereby avoiding the explosion of the power transformer and causing secondary damage to the surrounding environment.
Description
Technical Field
The invention relates to the field of power related equipment, in particular to an oil protection box for a power transformer.
Background
A transformer is a device that changes an alternating voltage using the principle of electromagnetic induction, and main components are a primary coil, a secondary coil, and an iron core (magnetic core). In electrical equipment and wireless circuits, the high-voltage power supply is often used for voltage rise and fall, impedance matching, safety isolation and the like. In a generator, an electrical potential can be induced in a coil, whether the coil is moved through a magnetic field or a magnetic field is moved through a stationary coil. In both cases, the value of the magnetic flux is constant, but the amount of the magnetic flux linked with the coil varies, which is the principle of mutual induction. A transformer is a device for transforming voltage, current and impedance by using mutual electromagnetic induction.
Along with upgrading and transformation of a power grid, the number of waste power transformers is more and more, meanwhile, in the used power transformers, a large part of transformer oil still needs to be added continuously, the transformer oil is stored in a sealing cover mode in the prior art, the transformer oil is over-pressurized and explodes, if an open mode is adopted, moisture in the air enters the transformer oil in a large quantity, the transformer oil absorbs the moisture, the oil quality of the transformer is poor, and safe operation of the transformer cannot be effectively guaranteed.
Disclosure of Invention
The invention aims to solve the problems and designs an oil protection box for a power transformer.
In order to achieve the purpose, the invention adopts the following technical scheme:
an oil protection box for a power transformer comprises a sealing bottom plate, wherein the sealing bottom plate is fixedly arranged above the power transformer, a sealing baffle is connected with the power transformer in a sealing manner, an oil-gas separation type pressure relief water removal device is arranged above the sealing bottom plate, and a conical convenient exhaust device is arranged on the sealing bottom plate;
the oil-gas separation type pressure relief dewatering device comprises an expansion oil cylinder arranged above a sealing bottom plate, an exhaust pipe is arranged at the center of the upper surface of the expansion oil cylinder, a one-way exhaust valve is arranged on the exhaust pipe, the exhaust direction of the one-way exhaust valve is the outside of the expansion oil cylinder, an oil-gas separation cylinder is arranged inside the expansion oil cylinder, sealing pistons are arranged at the upper end and the lower end of the outer side surface of the oil-gas separation cylinder and are connected with the expansion oil cylinder in a sliding manner, an annular balancing weight is arranged on the outer side surface of the oil-gas separation cylinder and is positioned between the two sealing pistons, an oil-gas separation membrane I is arranged at the lower end inside the oil-gas separation cylinder, a hard breathable sponge I is arranged above the oil-gas separation membrane I, an oil-gas separation membrane II is arranged above the hard breathable sponge II, a supporting plate is installed above the hard breathable sponge II, a plurality of air holes are formed in the supporting plate and are uniformly distributed on the supporting plate, an active carbon drying agent is installed above the supporting plate and is located above the inner part of the oil-gas separation cylinder, a compression spring is installed on the upper surface of the inner part of the expansion oil cylinder, an annular supporting baffle is installed at the lower end of the compression spring and is in movable contact with a sealing piston above the outer side surface of the oil-gas separation cylinder, a secondary drying cylinder is installed inside the annular supporting baffle, a calcium chloride drying agent is installed in the secondary drying cylinder, a plurality of L-shaped emergency discharge pipes are installed above the outer side surface of the expansion oil cylinder and are uniformly distributed above the outer side surface of the expansion oil cylinder, and the positions of the L-shaped emergency discharge pipes are lower than the highest positions of the lower surface of the oil-gas separation cylinder after rising, the upper end of the L-shaped emergency discharge pipe is provided with a safety valve, the discharge pressure of the safety valve is 1.2Mpa, the height of the safety valve is higher than the highest height of the oil-gas separation cylinder, the outer side surface of the expansion oil cylinder is provided with a plurality of first annular heat dissipation fins, and the first annular heat dissipation fins are uniformly distributed on the outer side surface of the expansion oil cylinder.
Further, the convenient exhaust apparatus of toper formula includes sealing baseplate upper surface center department opens has a plurality of circular expansion holes, a plurality of circular expansion hole evenly distributed are on sealing baseplate, install the toper expansion cover on the circular expansion hole, the toper expands and installs a plurality of annular radiating fin two on the cover outside surface, a plurality of annular radiating fin two evenly distributed are on the toper expansion cover outside surface, toper expansion cover upper surface center department installs the expansion finned tube, is located sealing baseplate conical expansion cover top in the middle of installs the delivery nozzle stub, the upper end and the expansion oil section of thick bamboo fixed connection of delivery nozzle stub, expansion finned tube and delivery nozzle stub fixed connection.
Furthermore, the volumes of the expansion oil cylinder, the conical expansion cover, the expansion finned tube and the conveying short tube are larger than the maximum expansion amount of the transformer oil of the power transformer.
Further, the highest liquid level of the transformer oil in the expansion oil cylinder is lower than the highest position of the raised lower surface of the oil-gas separation cylinder.
Further, the size of the sealing bottom plate is consistent with that of the top cover of the transformer.
Furthermore, the maximum elasticity of the compression spring is lower than the maximum pressure bearing capacity of the first hard breathable sponge and the second hard breathable sponge.
Further, the position of the safety valve is higher than the highest expansion liquid level of the transformer oil in the expansion oil cylinder.
Further, the total exhaust rate of the L-shaped emergency exhaust pipe is greater than that of the exhaust pipe.
The oil protection box for the power transformer manufactured by the technical scheme of the invention has the following beneficial effects:
the oil protection box utilizes the expansion and the temperature of the transformer oil to enable air containing water vapor to be separated from the transformer oil through the dual oil-gas separation membrane, so that moisture in the transformer oil is removed, and the oil inside the transformer is guaranteed to be healthy.
This oil protection case, through one-way discharge valve's use, makes the transformer be in one-way open, can effectually avoid the emergence of the transformer explosion problem that leads to because of the pressure problem, and through the use of L type emergency discharge pipe and blast pipe, can make power transformer lead to the gaseous of transformer oil schizolysis production because of the trouble can discharge a large amount of fast to avoid power transformer to explode, avoid causing secondary damage to the surrounding environment.
This oily guard box through the cooperation of compression spring with annular balancing weight, makes transformer oil and sealed piston and oil-gas separation membrane first abundant contact to make the inside transformer oil of transformer separate with the air, thereby make transformer oil and the inside air of transformer keep apart and deposit, protect transformer oil once more.
Drawings
FIG. 1 is a schematic structural diagram of an oil protection box for a power transformer according to the present invention;
FIG. 2 is a schematic structural diagram of an oil protection box for a power transformer according to the present invention;
FIG. 3 is a schematic structural diagram of an oil protection box for a power transformer according to the present invention;
FIG. 4 is a schematic structural diagram of an oil protection box for a power transformer according to the present invention;
in the figure, 1, a sealing bottom plate; 2. an expansion oil cylinder; 3. an exhaust pipe; 4. a one-way exhaust valve; 5. an oil-gas separation cylinder; 6. a sealing piston; 7. an annular counterweight block; 8. a first oil-gas separation membrane; 9. a first hard breathable sponge; 10. a second oil-gas separation membrane; 11. a second hard breathable sponge; 12. a support plate; 13. air holes are formed; 14. an activated carbon desiccant; 15. a compression spring; 16. an annular support baffle; 17. a secondary drying cylinder; 18. a calcium chloride desiccant; 19. an L-shaped emergency drain pipe; 20. a safety valve; 21. a first annular heat dissipation fin; 22. a circular expansion hole; 23. a conical expansion shell; 24. a second annular heat dissipation fin; 25. an expansion finned tube; 26. a short conveying pipe.
Detailed Description
The invention is described in detail below with reference to the drawings, as shown in fig. 1-4.
The invention relates to a structural design of an oil-gas separation type pressure relief and water removal device, which is characterized in that an expansion oil cylinder 2 is arranged above a sealing bottom plate 1, an exhaust pipe 3 is arranged at the center of the upper surface of the expansion oil cylinder 2, a one-way exhaust valve 4 is arranged on the exhaust pipe 3, the exhaust direction of the one-way exhaust valve 4 is the outside of the expansion oil cylinder 2, an oil-gas separation cylinder 5 is arranged inside the expansion oil cylinder 2, sealing pistons 6 are arranged at the upper end and the lower end of the outer side surface of the oil-gas separation cylinder 5, the sealing pistons 6 are in sliding connection with the expansion oil cylinder 2, an annular balancing weight 7 is arranged on the outer side surface of the oil-gas separation cylinder 5, the annular balancing weight 7 is positioned between the two sealing pistons 6, an oil-gas separation membrane I8 is arranged at the lower end inside the oil-gas separation cylinder 5, and a hard breathable sponge I9 is arranged above the oil-gas separation membrane I8, a second oil-gas separation membrane 10 is arranged above the first hard breathable sponge 9, a second hard breathable sponge 11 is arranged above the second oil-gas separation membrane 10, a support plate 12 is arranged above the second hard breathable sponge 11, a plurality of air holes 13 are formed in the support plate 12, the air holes 13 are uniformly distributed on the support plate 12, an activated carbon drying agent 14 is arranged above the support plate 12, the activated carbon drying agent 14 is positioned above the inside of the oil-gas separation cylinder 5, a compression spring 15 is arranged on the upper surface of the inside of the expansion oil cylinder 2, an annular support baffle 16 is arranged at the lower end of the compression spring 15, the annular support baffle 16 is in movable contact with a sealing piston 6 above the outer side surface of the oil-gas separation cylinder 5, a secondary drying cylinder 17 is arranged inside the annular support baffle 16, a calcium chloride drying agent 18 is arranged inside the secondary drying cylinder 17, and a plurality of L-shaped emergency discharge pipes 19 are arranged above the outer side surface of the expansion oil cylinder 2, the L-shaped emergency discharge pipes 19 are uniformly distributed above the outer side surface of the expansion oil cylinder 2, the positions of the L-shaped emergency discharge pipes 19 are lower than the highest position of the raised lower surface of the oil-gas separation cylinder 5, a safety valve 20 is mounted at the upper end of each L-shaped emergency discharge pipe 19, the discharge pressure of each safety valve 20 is 1.2Mpa, the height of each safety valve 20 is higher than the highest height of the oil-gas separation cylinder 5, a plurality of annular cooling fins 21 are mounted on the outer side surface of the expansion oil cylinder 2, and the annular cooling fins 21 are uniformly distributed on the outer side surface of the expansion oil cylinder 2; through the use of the first oil-gas separation membrane 8 and the second oil-gas separation membrane 10, the transformer oil can be heated to expand to push the oil-gas separation cylinder 5 to lift so as to facilitate the expansion of the transformer oil, and simultaneously along with the expansion of the transformer oil, the air in the transformer passes through the first oil-gas separation membrane 8 and the second oil-gas separation membrane 10 so as to separate the air from the transformer oil, while the moisture in the transformer oil gradually evaporates along with the rise of the temperature of the transformer oil, so that the moisture in the transformer oil is separated from the transformer oil along with the air, on one hand, the moisture in the transformer oil is removed, on the other hand, the external moisture can be prevented from entering the transformer oil, so that the quality of the transformer oil is ensured, and through the use of the activated carbon drying agent 14 and the calcium chloride drying agent 18, the moisture in the transformer can be rapidly absorbed, so as to prevent the secondary contact with the transformer oil, guarantee transformer oil's oil, use through one-way discharge valve 4, make the transformer be in one-way open, can guarantee on the one hand that the inside gas of transformer is in the ordinary pressure, avoid the transformer pressurized too big and the condition of taking place to leak takes place, on the other hand can avoid the injection of outside air again, make the transformer be in encapsulated situation, thereby guarantee transformer oil's safe handling, and the use through L type emergency discharge pipe 19 and relief valve 20, then can avoid the emergence of transformer explosion condition, make the inside gas of transformer can discharge fast, thereby reduce the influence of transformer explosion to the surrounding environment.
The invention of the scheme is characterized in the structural design of the conical convenient exhaust device, and by combining the attached drawings 1 and 4, the conical convenient exhaust device comprises a sealing bottom plate 1, wherein a plurality of circular expansion holes 22 are formed in the center of the upper surface of the sealing bottom plate 1, the circular expansion holes 22 are uniformly distributed on the sealing bottom plate 1, a conical expansion cover 23 is arranged on the circular expansion holes 22, a plurality of annular radiating fins 24 are arranged on the outer side surface of the conical expansion cover 23, the annular radiating fins 24 are uniformly distributed on the outer side surface of the conical expansion cover 23, an expansion finned tube 25 is arranged in the center of the upper surface of the conical expansion cover 23, a conveying short tube 26 is arranged above the conical expansion cover 23 located in the middle of the sealing bottom plate 1, the upper end of the conveying short tube 26 is fixedly connected with an expansion oil cylinder 2, and the expansion finned tube 25 is fixedly connected with the conveying short tube 26; through the use of toper expansion cap 23, then can make things convenient for the emission of the inside air of transformer, avoid the air to persist in the transformer, also make things convenient for the gaseous emission when transformer explodes simultaneously, through the use of expansion finned tube 25 and two 24 of annular radiating fin, then can accelerate the heat dissipation of transformer oil to guarantee the oil temperature of transformer oil.
In the device, the volumes of the expansion oil cylinder 2, the conical expansion cover 23, the expansion finned tube 25 and the conveying short tube 26 are larger than the maximum expansion amount of the transformer oil of the power transformer; the normal expansion of the transformer oil can be effectively ensured.
In this device, the highest liquid level of the inside transformer oil of expansion oil cylinder 2 is less than the highest position of the lower surface after oil-gas separation cylinder 5 rises, makes expansion oil cylinder 2 can guarantee predetermined surplus, avoids the error to guarantee power transformer's normal operating.
In the device, the size of the sealing bottom plate 1 is consistent with that of a top cover of the transformer; the installation of the device is effectively facilitated.
In the device, the maximum elasticity of the compression spring 15 is lower than the maximum pressure bearing of the first hard breathable sponge 9 and the second hard breathable sponge 11; .
In the device, the position of the safety valve 20 is higher than the highest expansion liquid level of the transformer oil in the expansion oil cylinder 2; the transformer oil is prevented from being discharged through the safety valve 20 due to the explosion of the transformer, so that the transformer oil is always in the device.
In the device, the total exhaust rate of the L-shaped emergency exhaust pipe 19 is greater than that of the exhaust pipe 3, so that the emergency exhaust speed of the device is ensured, and the situation that the air pressure inside the transformer is too high and the transformer explodes is avoided.
The working principle is as follows:
when the device is required to be used, the top cover of the transformer is detached, the sealing bottom plate 1 is installed above the transformer, the sealing treatment is carried out between the transformer and the sealing bottom plate, and then the transformer can be connected with a power grid;
when the transformer is incorporated into the power grid, the transformer starts to work, and when the transformer works, the winding and the iron core inside the transformer start to generate heat, after the heat is transferred to the transformer oil, the oil temperature of the transformer oil begins to increase, the transformer oil expands under the action of heat along with the increase of the oil temperature of the transformer oil, the volume of the transformer oil is increased, at the moment, the liquid level of the transformer oil begins to gradually rise in the process of gradually rising the temperature of the transformer oil, so that the air inside the transformer is pushed by the liquid level of the transformer oil into the conical expansion shell 23 on the sealing bottom plate 1, and as the temperature of the transformer oil continuously rises, the transformer oil pushes the air in the transformer to enter the expansion finned tube 25 and the conveying short tube 26, then the oil enters the expansion oil cylinder 2, and the transformer oil also rises into the expansion oil cylinder 2 along with the continuous increase of the oil temperature of the transformer oil;
when transformer oil is injected into the expansion oil cylinder 2, air in the transformer inside the expansion oil cylinder 2 is extruded by the transformer oil and the sealing piston 6 through the gravity of the annular balancing weight 7, so that the air in the transformer passes through the first oil-gas separation membrane 8, enters the first hard breathable sponge 9, passes through the second oil-gas separation membrane 10, enters the second hard breathable sponge 11, then passes through the air holes 13 in the supporting plate 12, enters the activated carbon drying agent 14, absorbs moisture in the air inside the transformer, moves to the position above the oil-gas separation cylinder 5 inside the expansion oil cylinder 2, and when the oil temperature of the transformer oil continuously rises, the oil level of the transformer oil inside the expansion oil cylinder 2 gradually rises, and is contacted with the first oil-gas separation membrane 8 at the lower end of the oil-gas separation cylinder 5 and the sealing piston 6, the oil-gas separation cylinder 5 and the sealing piston 6 are pushed to move upwards, when the oil temperature of the transformer oil rises to the maximum, the transformer oil pushes the oil-gas separation cylinder 5 and the sealing piston 6 to a certain height in the expansion oil cylinder 2, and meanwhile, the oil-gas separation cylinder 5 and the sealing piston 6 push the compression spring 15 to be compressed in the ascending process due to the pushing of the transformer oil, so that the oil-gas separation cylinder 5 and the sealing piston 6 are pushed downwards by the compression spring 15, the air remained below the oil-gas separation cylinder 5 and the sealing piston 6 completely moves to the upper part in the expansion oil cylinder 2 through the elastic force matching of the annular balancing weight 7 and the compression spring 15, and the transformer oil in the expansion oil cylinder 2 is separated from the air;
and during the upward movement of the oil-gas separation cylinder 5 and the sealing piston 6, the air above the inside of the expansion oil cylinder 2 is compressed at the moment, so that the air above the inside of the expansion oil cylinder 2 is discharged to the external environment through the exhaust pipe 3, thereby keeping the interior of the expansion oil cylinder 2 in a normal pressure state, and simultaneously in the process of continuously heating the transformer oil, the water in the transformer oil is gradually evaporated to form water vapor along with the rise of the temperature of the transformer oil, the water vapor continuously rises in the transformer oil and is conveyed into the expansion oil cylinder 2 through the conical expansion cover 23, the expansion finned tube 25 and the conveying short tube 26, then the oil gas separation membrane I8 and the oil gas separation membrane 10 are penetrated into an active carbon drying agent 14, so as to be absorbed by the active carbon drying agent 14, thereby removing the moisture in the transformer oil, ensuring the safe use of the transformer oil and ensuring the quality of the transformer oil;
in the process of running the transformer, because the external environment is fixed, the load of the transformer can be changed along with the change of the electric load, and the change of the load of the transformer can cause the heat generated by a winding and an iron core in the transformer to be changed, thereby causing the oil temperature of the transformer oil to be correspondingly adjusted, when the load of the transformer is increased until the transformer runs at full load, the oil temperature of the transformer oil is increased, the oil temperature of the transformer oil is driven to be increased, the expansion liquid level of the transformer oil is driven to be increased, thereby causing the oil-gas separation cylinder 5 to be increased to the highest position, simultaneously causing the gas content in the expansion oil cylinder 2 to be reduced to the lowest, when the load of the transformer is reduced, the oil temperature of the transformer oil is reduced, the expansion liquid level of the transformer oil is driven to be reduced, thereby driving the sealing piston 6 and the oil-gas separation cylinder 5 to be reduced, the space above the inside of the expansion oil cylinder 2 is increased, but the outside air is not injected into the expansion oil cylinder 2, so that the pressure of the air above the inside of the expansion oil cylinder 2 is reduced to form negative pressure, and the normal operation of the transformer is ensured.
When the transformer is exploded due to failure, the transformer oil inside the transformer is heated to begin to be separated and generate a large amount of hydrocarbon mixers under the action of high temperature or electric arc, the gas rises in the transformer oil through the buoyancy of the gas, then is conveyed into the expansion oil cylinder 2 through the conical expansion cover 23, the expansion finned tube 25 and the conveying short tube 26 and is accumulated below the inside of the expansion oil cylinder 2, at the moment, the oil-gas separation cylinder 5 rises to the highest position inside the expansion oil cylinder 2 due to the increase of the pressure inside the transformer, meanwhile, part of the gas passes through the first oil-gas separation membrane 8 and the second oil-gas separation membrane 10 under the action of pressure, enters the upper part inside the expansion oil cylinder 2 and is discharged through the discharge pipe 3, and most of the gas is still stored in the expansion oil cylinder 2 due to the slow ventilation efficiency of the first oil-gas separation membrane 8 and the second oil-gas separation membrane 10, at the moment, gas enters the L-shaped emergency discharge pipe 19 through the flow of the gas, gradually moves to the position above the liquid level of transformer oil in the L-shaped emergency discharge pipe 19, is accumulated, the gas pressure in the expansion oil cylinder 2 and the L-shaped emergency discharge pipe 19 is gradually increased along with the gradual increase of the gas, when the gas pressure is higher than the discharge pressure of the safety valve 20, the gas is discharged to the external environment through the safety valve 20, so that the transformer oil is prevented from being heated and decomposed to cause the explosion of the transformer when the transformer fails, the damage of the transformer failure is reduced to the minimum, the safe operation of the transformer is ensured, the transformer body is prevented from being damaged, the leakage of the transformer is avoided, the transformer oil is protected, and when the transformer is fixed, the temperature of the transformer oil in the transformer is overhigh at the moment, and air is not contained in the transformer, so that the transformer oil can not be burnt, thereby reducing the occurrence of fire hazard generated when the transformer explodes.
In this device, the annular radiating fin 21 that the 2 outside surfaces of expansion oil cylinder set up can make expansion oil cylinder 2 dispel the heat fast to reduce transformer oil's temperature, simultaneously through the use of two 24 of annular radiating fin, can increase the radiating effect of sealed bottom plate 1, in order to guarantee transformer oil's cooling, and through the use of expansion finned tube 25, then can make transformer oil at the inflation in-process, dispel the heat through expansion finned tube 25, in order to guarantee transformer oil's radiating effect.
In the device, the calcium chloride drying agent 18 in the secondary drying cylinder 17 in the annular supporting baffle 16 is used for drying air above the inside of the expansion oil cylinder 2, so that the situation that the device cannot absorb moisture due to incomplete moisture absorption of the active carbon drying agent 14 or water absorption saturation of the active carbon drying agent is avoided, and the device can stably remove moisture in the transformer oil.
In this device, through setting up oil-gas separation membrane one 8 and oil-gas separation membrane two 10, can guarantee the inside oil-gas separation effect of expansion oil section of thick bamboo 2, avoid when using the oil-gas separation membrane alone, the condition that leads to the unable normal work of device to take place because of the oil-gas separation membrane damages, simultaneously through the ventilative sponge of stereoplasm one 9 and the ventilative sponge two 11 respectively to the support of oil-gas separation membrane one 8 and oil-gas separation membrane two 10, can avoid the too big damaged condition of the too big emergence of oil-gas separation membrane one 8 pressurized, the effectual intensity that increases oil-gas separation membrane one 8, guarantee the safe handling of device.
In this device, through the use of one-way discharge valve 4, make the transformer be in one-way open state, thereby make the transformer during operation inside be in the ordinary pressure state, guarantee the safe operation of transformer on the one hand, on the other hand also avoids leading to the increase of transformer oil inflation efficiency because of atmospheric pressure is too big, simultaneously when transformer stop work, along with the shrink of transformer oil this moment, make the inside negative pressure that forms of transformer, thereby make the transformer seal more stable, the effectual injection of avoiding the outside air, make transformer oil can keep dry use for a long time, improve the oily of transformer oil
The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.
Claims (8)
1. An oil protection box for a power transformer comprises a sealing bottom plate (1), wherein the sealing bottom plate (1) is fixedly arranged above the power transformer, and a sealing baffle is hermetically connected with the power transformer, and is characterized in that an oil-gas separation type pressure relief water removal device is arranged above the sealing bottom plate (1), and a conical convenient exhaust device is arranged on the sealing bottom plate (1);
the oil-gas separation type pressure relief water removal device comprises an expansion oil cylinder (2) arranged above a sealing bottom plate (1), an exhaust pipe (3) is arranged at the center of the upper surface of the expansion oil cylinder (2), a one-way exhaust valve (4) is arranged on the exhaust pipe (3), the exhaust direction of the one-way exhaust valve (4) is the outside of the expansion oil cylinder (2), an oil-gas separation cylinder (5) is arranged inside the expansion oil cylinder (2), sealing pistons (6) are arranged at the upper end and the lower end of the outer side surface of the oil-gas separation cylinder (5), the sealing pistons (6) are in sliding connection with the expansion oil cylinder (2), an annular balancing weight (7) is arranged on the outer side surface of the oil-gas separation cylinder (5), the annular balancing weight (7) is located between the two sealing pistons (6), and an oil-gas separation membrane I (8) is arranged at the lower end inside the oil-gas separation cylinder (5), hard breathable sponge (9) is installed above the oil-gas separation membrane (8), oil-gas separation membrane two (10) is installed above the hard breathable sponge (9), hard breathable sponge two (11) is installed above the oil-gas separation membrane two (10), a support plate (12) is installed above the hard breathable sponge two (11), a plurality of air holes (13) are formed in the support plate (12), the air holes (13) are uniformly distributed on the support plate (12), an active carbon drying agent (14) is installed above the support plate (12), the active carbon drying agent (14) is located above the inside of the oil-gas separation cylinder (5), a compression spring (15) is installed on the upper surface of the inside of the expansion oil cylinder (2), an annular supporting baffle (16) is installed at the lower end of the compression spring (15), and the annular supporting baffle (16) is in movable contact with a sealing piston (6) above the outer side surface of the oil-gas separation cylinder (5), a secondary drying cylinder (17) is arranged in the annular supporting baffle (16), a calcium chloride drying agent (18) is arranged in the secondary drying cylinder (17), a plurality of L-shaped emergency discharge pipes (19) are arranged above the outer surface of the expansion oil cylinder (2), the plurality of L-shaped emergency discharge pipes (19) are uniformly distributed above the outer side surface of the expansion oil cylinder (2), the position of the L-shaped emergency discharge pipe (19) is lower than the highest position of the raised lower surface of the oil-gas separation cylinder (5), the upper end of the L-shaped emergency discharge pipe (19) is provided with a safety valve (20), the discharge pressure of the safety valve (20) is 1.2Mpa, the height of the safety valve (20) is higher than the highest height of the oil-gas separation cylinder (5), a plurality of annular first radiating fins (21) are arranged on the outer side surface of the expansion oil cylinder (2), the first annular radiating fins (21) are uniformly distributed on the outer side surface of the expansion oil cylinder (2).
2. The oil quality protection box for the power transformer according to claim 1, wherein the tapered convenient exhaust device comprises a plurality of circular expansion holes (22) formed in the center of the upper surface of the sealing bottom plate (1), the circular expansion holes (22) are uniformly distributed on the sealing bottom plate (1), a tapered expansion cover (23) is installed on the circular expansion holes (22), a plurality of annular radiating fins (24) are installed on the outer side surface of the tapered expansion cover (23), the annular radiating fins (24) are uniformly distributed on the outer side surface of the tapered expansion cover (23), an expansion finned tube (25) is installed in the center of the upper surface of the tapered expansion cover (23), a delivery short tube (26) is installed above the tapered expansion cover (23) located in the middle of the sealing bottom plate (1), and the upper end of the delivery short tube (26) is fixedly connected with the expansion oil cylinder (2), the expansion finned tube (25) is fixedly connected with the conveying short tube (26).
3. An oil protection tank for a power transformer according to claim 1, characterized in that the volumes of the expansion oil cylinder (2), the conical expansion hood (23), the expansion finned tube (25) and the delivery stub (26) are greater than the maximum expansion of the transformer oil of the power transformer.
4. The oil protection box for the power transformer according to claim 1, wherein the maximum level of transformer oil inside the expansion oil cylinder (2) is lower than the highest position of the raised lower surface of the oil-gas separation cylinder (5).
5. An oil protection box for a power transformer according to claim 1, characterized in that the size of the sealing bottom plate (1) is consistent with the size of the top cover of the transformer.
6. The oil protection box for the power transformer according to claim 1, wherein the maximum elasticity of the compression spring (15) is lower than the maximum pressure bearing capacity of the first rigid air-permeable sponge (9) and the second rigid air-permeable sponge (11).
7. An oil protection tank for a power transformer according to claim 1, characterized in that the safety valve (20) is located above the maximum expansion level of transformer oil in the expansion oil drum (2).
8. An oil protection tank for an electric power transformer according to claim 1, characterized in that the total exhaust rate of the L-shaped emergency exhaust pipe (19) is greater than the exhaust rate of the exhaust pipe (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111427745.2A CN114050030A (en) | 2021-11-29 | 2021-11-29 | Oil protection box for power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111427745.2A CN114050030A (en) | 2021-11-29 | 2021-11-29 | Oil protection box for power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114050030A true CN114050030A (en) | 2022-02-15 |
Family
ID=80211460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111427745.2A Withdrawn CN114050030A (en) | 2021-11-29 | 2021-11-29 | Oil protection box for power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114050030A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117497291A (en) * | 2023-12-29 | 2024-02-02 | 四川众信通用电力有限公司 | High-safety oil-cooled transformer |
-
2021
- 2021-11-29 CN CN202111427745.2A patent/CN114050030A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117497291A (en) * | 2023-12-29 | 2024-02-02 | 四川众信通用电力有限公司 | High-safety oil-cooled transformer |
| CN117497291B (en) * | 2023-12-29 | 2024-03-22 | 四川众信通用电力有限公司 | High-safety oil-cooled transformer |
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Application publication date: 20220215 |
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