CN116453815A - Transformer oil tank pressure regulating device and installation method - Google Patents
Transformer oil tank pressure regulating device and installation method Download PDFInfo
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- CN116453815A CN116453815A CN202310462548.7A CN202310462548A CN116453815A CN 116453815 A CN116453815 A CN 116453815A CN 202310462548 A CN202310462548 A CN 202310462548A CN 116453815 A CN116453815 A CN 116453815A
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000009434 installation Methods 0.000 title claims abstract description 7
- 230000001502 supplementing effect Effects 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims 3
- 230000008602 contraction Effects 0.000 abstract description 2
- 239000002775 capsule Substances 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000001595 contractor effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention relates to a transformer tank pressure regulating device and an installation method, wherein the transformer tank pressure regulating device comprises a shell, a baffle plate is fixed in the middle of the shell, a vertical pipe is fixed at the lower end of the baffle plate, a first piston plate is arranged in a cavity at the upper end of the vertical pipe, a second piston plate is arranged in the vertical pipe, a vertical rod is fixed between the first piston plate and the second piston plate, an annular third piston plate is arranged on the outer side of the vertical pipe, a spring is fixed between the third piston plate and the lower end face of the shell, a through hole is formed in the middle of the second piston plate, a baffle plate is hinged in the through hole, an upper baffle ring and a lower baffle ring are respectively fixed on the inner edge face of the vertical pipe, when the second piston plate moves to the upper baffle ring position, the baffle plate can only swing upwards from a horizontal position, and when the second piston plate moves to the lower baffle ring position, the baffle plate can only swing downwards from the horizontal position. The invention can effectively avoid the influence of positive and negative pressure caused by expansion and contraction in extreme environment on the oil tank shell and electric elements of the transformer in the oil tank, and greatly prolongs the service life of the transformer.
Description
Technical Field
The invention relates to the field of protection of transformer equipment, in particular to a transformer oil tank pressure regulating device and an installation method.
Background
The oil immersed transformer greatly improves the heat dissipation and insulation of the transformer by immersing the transformer component in transformer oil, effectively prevents ageing of materials, is widely applied in the field of transformers, but the transformer oil is easily influenced by environmental temperature to generate expansion and contraction effects, so that positive pressure or negative pressure is generated in the transformer to influence the service life of a sealing element of the transformer, a conservator communicated with an oil tank is usually arranged above the transformer in the prior art, the volume of the conservator is generally 8% -10% of the volume of the transformer oil tank, the contact area of the transformer with air is reduced, the transformer can timely store or supplement the transformer oil when the transformer oil expands with heat and contracts with cold, and the transformer oil still contacts with the air although the problems of positive pressure and negative pressure can be solved, so that the transformer oil is still deteriorated and polluted after long-time use and needs periodic oil replacement;
in order to prevent oil from contacting with the atmosphere, a diaphragm type or capsule type transformer oil pillow is usually adopted in a large-sized transformer, for example, a diaphragm type transformer oil pillow disclosed in publication number CN 105070471A, and the following defects are caused by that the diaphragm moves up and down along with the oil level to adapt to pressure change: (1) The scheme is provided with a positive pressure oil drainage structure, but a negative pressure oil supplementing structure is not arranged, when the positive pressure exceeds the maximum deformation amount of the diaphragm, the flexible opening oil drainage is opened, and as the oil discharged through the flexible opening cannot return to the diaphragm again and the transformer oil is not cleaned or supplemented timely, the upper side area of the diaphragm can be polluted, the total oil quantity in the oil tank can be reduced, the deformation amount of the diaphragm in a low-temperature environment is influenced, and finally the negative pressure of the diaphragm can be possibly torn; (2) In low temperature weather, especially in winter, the surface of the capsule or the diaphragm is easy to freeze, the softness of the surface is reduced, the water content is increased, the capsule or the diaphragm is easy to age and crack, and the capsule or the diaphragm is easy to break during oiling, so that moisture is easy to enter oil.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention adopts the transformer oil tank pressure regulating device and the installation method, and solves the problem of poor pressure compensation capability of the transformer oil tank in extreme weather.
The technical scheme includes that the transformer oil tank pressure regulating device comprises a cylindrical shell, wherein a horizontal partition plate is fixed in the middle of the shell, the cavity of the shell is divided into an upper part and a lower part by the partition plate, the upper part and the lower part are respectively a first cavity and a second cavity, a vertical pipe is fixed at the lower end of the partition plate, the vertical pipe is coaxially arranged with the shell, the outer edge surface of the vertical pipe is arranged at intervals with the inner edge surface of the shell, the upper end of the vertical pipe is communicated with the first cavity, a first piston plate is arranged in the first cavity, the first piston plate is in fit and seal with the inner edge surface of the first cavity and can slide up and down, a second piston plate is arranged in the vertical pipe, the second piston plate is in fit and seal with the inner edge surface of the vertical pipe and can slide up and down, an annular third piston plate is arranged at the outer side of the vertical pipe, and a piston spring is fixed between the third piston plate and the inner edge surface of the second cavity, and the lower end surface of the shell, and the piston plate is always positioned in the middle of the second cavity;
the middle part of the second piston plate is provided with a through hole, a baffle plate is hinged in the through hole, the through hole can be blocked when the baffle plate is in a horizontal position, the inner edge surface of the vertical pipe is respectively fixed with an upper baffle ring and a lower baffle ring, the baffle rings can limit the moving range of the second piston plate, when the second piston plate moves to the upper baffle ring position, the baffle plate can only swing upwards from the horizontal position, and when the second piston plate moves to the lower baffle ring position, the baffle plate can only swing downwards from the horizontal position.
The baffle is hinged to the right end of the through hole, a rectangular hole penetrating through the upper end face and the lower end face is formed in the left side of the second piston plate below the baffle ring, an upper transverse hole and a lower transverse hole are formed in the right end face of the rectangular hole, the transverse holes penetrate through the left end face of the through hole to the right, a stop lever capable of sliding left and right along the transverse holes is arranged in each transverse hole, when the right end of the upper stop lever is arranged in the through hole, the baffle can be prevented from swinging upwards in the horizontal direction, and when the right end of the lower stop lever is arranged in the through hole, the baffle can be prevented from swinging downwards in the horizontal direction;
the slide bar with the length greater than the rectangular hole is arranged in the rectangular hole, the side face of the slide bar is bonded and sealed with the rectangular hole and can slide up and down along the rectangular hole, an upper yielding hole and a lower yielding hole are formed in the right end face of the slide bar, when the upper end of the slide bar is level with the upper end face of the second piston plate, the cross bar on the upper side can move leftwards into the yielding hole on the upper side, meanwhile, the right end of the cross bar on the upper side does not swing upwards on the blocking baffle, when the lower end of the slide bar is level with the lower end face of the second piston plate, the cross bar on the lower side can move leftwards into the yielding hole on the lower side, and meanwhile, the right end of the cross bar on the lower side does not swing downwards on the blocking baffle.
The normal vector of the left end face of the stop lever on the upper side inclines downwards leftwards, and the normal vector of the right end face inclines downwards rightwards; the normal vector of the left end face of the stop lever at the lower side is inclined leftwards and upwards, and the normal vector of the right end face is inclined rightwards and upwards.
The baffle and the hinge position of the through hole are provided with torsion springs, and the torsion springs enable the baffle to be always subjected to torsion force for keeping the horizontal state.
The upper end face of the shell is provided with a first air vent communicated with the first cavity, the upper end of the first air vent is provided with a cover plate, and the cover plate is in clearance fit with the upper end face of the shell and is fixedly connected through a supporting rod; second ventilation holes communicated with the second cavity are respectively formed in the left side and the right side of the lower end face of the shell.
The length of the vertical rod is larger than the vertical displacement of the second piston plate, so that when the first piston plate moves to the lowest end along with the second piston plate, a space exists between the first piston plate and the partition plate.
The left end of the shell is provided with an oil supplementing port communicated with the upper half section of the second cavity, and the outer side of the oil supplementing port is provided with a flange cover for sealing the oil supplementing port.
The cross sections of the through holes and the baffle are rectangular.
According to the invention, the first piston plate and the second piston plate with different cross sections move synchronously, so that the cavity between the two piston plates is positive or negative, the third piston plate is driven to move synchronously, the baffle plate opens the through hole when the second piston plate moves to the uppermost end or the lowermost end, and the third piston plate resets to enable transformer oil in the cavity between the first piston plate and the second piston plate to exchange with transformer oil in the oil tank, so that the invention has the following advantages: 1. the influence of positive and negative pressure caused by expansion and contraction of heat on the oil tank shell and electric elements of the transformer in the oil tank in an extreme environment is effectively avoided, and the service life of the transformer is greatly prolonged; 2. the transformer oil exchange process is always not communicated with the outside, so that the transformer oil consumption is avoided, and meanwhile, the transformer oil aging speed is reduced; 3. can still normally operate in a low-temperature environment.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a front cross-sectional view of the second piston plate of the present invention moved to the lowermost end.
Fig. 3 is an enlarged view of a in fig. 2.
Fig. 4 is a front cross-sectional view of the second piston plate of the present invention moved to the uppermost end.
FIG. 5 is a front cross-sectional view of the housing, separator, standpipe and baffle ring of the present invention.
Fig. 6 is a perspective view of a first piston plate, a second piston plate and a vertical rod according to the present invention.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
The invention is given by fig. 1 to 6, the invention comprises a cylindrical shell 1, a partition board 2 in the horizontal direction is fixed in the middle of the shell 1, the partition board 2 divides the cavity of the shell 1 into an upper part and a lower part, the upper part and the lower part are respectively a first cavity 3 and a second cavity 4, a vertical pipe 5 is fixed at the lower end of the partition board 2, the vertical pipe 5 is coaxially arranged with the shell 1, the outer edge surface of the vertical pipe 5 is arranged at intervals with the inner edge surface of the shell 1, the upper end of the vertical pipe 5 is communicated with the first cavity 3, a first piston plate 6 is arranged in the first cavity 3, the first piston plate 6 is in fit and seal with the inner edge surface of the first cavity 3 and can slide up and down, a second piston plate 7 is arranged in the vertical pipe 5, the second piston plate 7 is in fit and seal with the inner edge surface of the vertical pipe 5 and can slide up and down, a vertical pipe 8 is fixed between the first piston plate 6 and the second piston plate 7, a third piston plate 9 in the outer side of the second cavity 4 is arranged at the outer side of the 5, the third piston plate 9 is in a ring shape, the inner edge surface of the vertical pipe 5 and the inner edge surface of the second cavity 4 is in fit with the inner edge surface of the piston plate 9 and the second cavity 4 and can slide up and down, the third piston plate 9 and the third piston plate 4 is always in the middle of the cavity 4 is fixed between the third piston plate 9 and the upper end surface and the third piston plate 9 is arranged;
the middle part of the second piston plate 7 is provided with a through hole 10, a baffle 11 is hinged in the through hole 10, the baffle 11 can block the through hole 10 when being in a horizontal position, an upper baffle ring 12 and a lower baffle ring 12 are respectively fixed on the inner edge surface of the vertical pipe 5, the baffle rings 12 can limit the moving range of the second piston plate 7, when the second piston plate 7 moves to the upper baffle ring 12 position, the baffle 11 can only swing upwards from the horizontal position, and when the second piston plate 7 moves to the lower baffle ring 12 position, the baffle 11 can only swing downwards from the horizontal position.
The baffle 11 is hinged at the right end of the through hole 10, a rectangular hole 13 penetrating through the upper end face and the lower end face is formed below the baffle ring 12 at the left side of the second piston plate 7, an upper transverse hole 14 and a lower transverse hole 14 are formed at the right end face of the rectangular hole 13, the transverse holes 14 penetrate through the left end face of the through hole 10 right, each transverse hole 14 is internally provided with a stop lever 15 capable of sliding left and right along the transverse hole 14, when the right end of the upper stop lever 15 is arranged in the through hole 10, the baffle 11 can be prevented from swinging upwards from the horizontal direction, and when the right end of the lower stop lever 15 is arranged in the through hole 10, the baffle 11 can be prevented from swinging downwards from the horizontal direction;
a slide bar 16 with the length larger than that of the rectangular hole 13 is arranged in the rectangular hole 13, the side face of the slide bar 16 is in fit sealing with the rectangular hole 13 and can slide up and down along the rectangular hole 13, an upper position yielding hole 17 and a lower position yielding hole 17 are formed in the right end face of the slide bar 16, when the upper end of the slide bar 16 is level with the upper end face of the second piston plate 7, the cross bar 15 on the upper side can move leftwards into the position yielding hole 17 on the upper side, meanwhile, the right end of the cross bar 15 on the upper side does not swing upwards on the blocking baffle 11, when the lower end of the slide bar 16 is level with the lower end face of the second piston plate 7, the cross bar 15 on the lower side can move leftwards into the position yielding hole 17 on the lower side, and meanwhile, the right end of the cross bar 15 on the lower side does not swing downwards on the blocking baffle 11.
The normal vector of the left end face of the stop lever 15 on the upper side inclines downwards leftwards, and the normal vector of the right end face inclines downwards rightwards; the normal vector of the left end face of the stop lever 15 at the lower side is inclined leftwards and upwards, and the normal vector of the right end face is inclined rightwards and upwards.
The baffle 11 is provided with a torsion spring at the hinged position with the through hole 10, and the torsion spring enables the baffle 11 to always receive torsion force for keeping a horizontal state.
The upper end face of the shell 1 is provided with a first air vent 18 communicated with the first cavity 3, the upper end of the first air vent 18 is provided with a cover plate 19, and the cover plate 19 is in clearance fit with the upper end face of the shell 1 and is fixedly connected through a support rod; the left and right sides of the lower end surface of the shell 1 are respectively provided with a second ventilation hole 20 communicated with the second cavity 4.
The length of the vertical rod 8 is larger than the vertical displacement of the second piston plate 7, so that when the first piston plate 6 moves to the lowest end along with the second piston plate 7, a space exists between the first piston plate 6 and the partition plate 2.
The left end of the shell 1 is provided with an oil supplementing port 21 communicated with the upper half section of the second cavity 4, and the outer side of the oil supplementing port 21 is provided with a flange cover 22 for sealing the oil supplementing port 21.
The cross section of the through hole 10 and the cross section of the baffle 11 are rectangular.
The use method of the invention comprises the following steps;
s1, communicating the lower end of a vertical pipe 5 with the upper end face of an oil immersed transformer oil tank, and filling the vertical pipe 5 with transformer oil;
s2, setting the distance between the two baffle rings 12, and being suitable for transformer oil tanks with different volumes, ensuring that the positive pressure or negative pressure value when the second piston plate 7 moves to the position of the baffle rings 12 is the minimum positive pressure or negative pressure value affecting the air tightness of the transformer;
s3, according to different seasons during installation, the initial positions of the second piston plate 7 and the sliding rod 16 are different, in order to ensure the subsequent use precision, the second piston plate 7 is installed in spring and autumn, the lower end face of the sliding rod 16 is flush with the lower end face of the second piston plate 7 in spring, and the upper end face of the sliding rod 16 is flush with the upper end face of the second piston plate 7 in autumn;
and S4, filling transformer oil into the cavity between the first piston plate 6, the second piston plate 7 and the third piston plate 9 through the oil filling port 21.
During normal operation, when the ambient temperature in summer rises, the volume of transformer oil in the transformer oil tank expands, positive pressure is generated by the expanded transformer oil due to limited deformation of the transformer oil tank, the lower end face of the sliding rod 16 is flush with the lower end face of the second piston plate 7, the right end of the upper stop rod 15 extends out of the through hole 10 and stops the baffle 11 from swinging upwards, the transformer oil pushes the second piston plate 7 to move upwards along the vertical pipe 5 through the positive pressure, the second piston plate 7 drives the first piston plate 6 to synchronously move upwards through the vertical rod 8, and because the cross section area of the first piston plate 6 is larger than that of the second piston plate 7, the volume of a cavity between the first piston plate 6 and the second piston plate 7 is gradually increased in the synchronous movement process of the first piston plate 6 and the second piston plate 7, and at the moment, in order to compensate negative pressure generated by the cavity increase between the first piston plate 6 and the second piston plate 7, the third piston plate 9 moves upwards by a certain distance against the tensile force of the spring, because the cavity of the upper side of the sliding rod 16 is negative in pressure and the cavity of the lower side is positive in pressure, the sliding rod 16 is always subjected to upward force to always keep the lower end face of the sliding rod 16 in a flush state with the lower end face of the second piston plate 7 until the upper end of the sliding rod 16 contacts with the upper baffle ring 12, the second piston plate 7 continues to move upwards, the upper end of the sliding rod 16 is blocked by the baffle ring 12 and is no longer moved upwards along with the second piston plate 7, the area of the second piston plate 7 subjected to force is far larger than that of the sliding rod 16, the sliding rod 16 moves downwards relative to the rectangular block 13, the lower baffle 15 moves rightwards under the extrusion action of the inclined surface at the left end to enable the right end of the lower baffle 15 to extend out of the through hole 10, the left end of the upper transverse hole 14 is aligned with the upper yielding hole 17, the inclined surface at the right end of the upper baffle 15 is pushed upwards by the baffle 11 to slide leftwards into the upper yielding hole 17, the upper yielding hole due to the upward swinging thrust of the baffle 11, the baffle 11 swings upwards to open the through hole 10 under the action of positive pressure of the transformer oil at the lower side, at the moment, the cavity between the first piston plate 6 and the second piston plate 7 is communicated with the transformer oil tank through the through hole 10, the third piston plate 9 resets downwards under the action of the tensile force of the spring, the positive pressure in the transformer oil tank is released, and the transformer oil tank is restored to the normal pressure state again;
similarly, when the environmental temperature decreases in winter, the volume of the transformer oil in the transformer oil tank is contracted, the lower end of the baffle 11 is blocked by the lower side stop lever 15 and cannot swing downwards, the second piston plate 7 moves downwards integrally to compensate for the negative pressure in the transformer oil tank, the third piston plate 9 moves downwards against the spring pressure in order to compensate for the positive pressure generated by the smaller cavity between the first piston plate 6 and the second piston plate 7 until the lower end surface of the second piston plate 7 contacts with the lower side stop ring 12, the slide rod 16 is extruded by the stop ring 12 to move upwards relative to the rectangular hole 13, the lower side stop lever 15 slides leftwards into the yielding groove, the baffle 11 swings downwards along the hinge point to open the through hole 11, the third piston plate 9 resets upwards under the action of the elastic force of the pressure spring, and part of transformer oil between the first piston plate 6 and the second piston plate 7 is injected into the transformer oil tank through the through hole 10 to compensate for the negative pressure, so that the transformer oil tank is restored to normal pressure.
The invention utilizes the difference of the cross sectional areas of the first piston plate 6 and the second piston plate 7, but the volume change is generated in the process of cavity re-moving between the first piston plate 6 and the second piston plate 7 through the synchronous movement of the vertical rods 8, when the transformer oil tank is positive pressure, the cavity negative pressure is generated between the first piston plate 6 and the second piston plate 7, when the second piston plate 7 is moved to the uppermost end, the baffle 11 opens the through hole 10 to re-balance the pressure in the two parts of cavities; when the transformer oil tank is at negative pressure, the cavity between the first piston plate 6 and the second piston plate 7 is at positive pressure, and when the second piston plate 7 moves to the lowest end, the baffle 11 opens the through hole 10 to re-balance the pressure in the two parts of cavities;
according to the invention, the left-right movement of the upper stop lever 15 and the lower stop lever 15 is controlled through the up-down movement of the slide bar 16, and through the cooperation of the inclined plane at the left end of the stop lever 15 and the yielding hole 17 at the right end of the slide bar 16, when a transformer oil tank is positive pressure, the baffle 11 is always blocked by the right end of the upper stop lever 15 and cannot swing upwards from the horizontal direction, when the transformer oil tank is negative pressure, the baffle 11 is always blocked by the lower stop lever 15, when the second piston plate 7 moves to the position of the stop ring 12, the slide bar 16 is extruded to generate relative displacement with the rectangular hole 13, then the blocking effect of the stop lever 15 on the baffle 11 is released, and the communication between a cavity between the first piston plate 6 and the second piston plate 7 and the transformer oil tank is realized, so that the pressure is balanced;
it should be noted that when abnormal weather is encountered, for example, sudden cooling in spring or sudden heating in autumn, since the baffle 11 is limited by one of the stop rods 15 to swing toward the other end, even if abnormal weather occurs, the transformer oil in the cavity between the first piston plate 6 and the second piston plate 7 can be pumped out to supplement the negative pressure in the transformer oil tank through the swing of the baffle 11, or the transformer in the transformer oil tank enters the cavity between the first piston plate 6 and the second piston plate 7 through the swing of the baffle 11, and at this time, the third piston plate 9 can move up and down to compensate the pressure change of the cavity between the first piston plate 6 and the second piston plate 7 by overcoming the spring force of the pressure spring, so that the pressure difference in the transformer oil tank is consistent with the spring force, and the effect of reducing the pressure difference of the transformer oil tank is achieved.
Claims (9)
1. The utility model provides a transformer tank pressure regulating device, including cylindrical casing (1), its characterized in that, casing (1) middle part be fixed with a horizontal direction baffle (2), baffle (2) divide into upper and lower two parts with casing (1) cavity, be first cavity (3) and second cavity (4) respectively, baffle (2) lower extreme is fixed a standpipe (5), standpipe (5) are placed with casing (1) coaxial and standpipe (5) outer fringe face and casing (1) inner edge face interval arrangement, standpipe (5) upper end and first cavity (3) intercommunication, be provided with a first piston plate (6) in first cavity (3), first piston plate (6) and first cavity (3) inner edge face laminating seal and can slide from top to bottom, be provided with a second piston plate (7) in standpipe (5), second piston plate (7) and standpipe (5) inner edge face sealing and can slide from top to bottom, be fixed between first piston plate (6) and second piston plate (7) and standpipe (5) outer fringe face laminating, second piston plate (8) are fixed with piston plate (4) and third piston plate (4) inner edge face laminating (9) and outside (9), a spring is fixed between the third piston plate (9) and the lower end surface of the shell (1), and the spring enables the third piston plate (9) to be always positioned in the middle of the second cavity (4);
the middle part of second piston board (7) is opened there is through-hole (10), articulates in through-hole (10) has a baffle (11), can block up through-hole (10) when baffle (11) are in horizontal position, riser (5) inner edge face is fixed with two upper and lower baffle rings (12) respectively, baffle ring (12) can restrict the range of movement of second piston board (7), when second piston board (7) remove to upper side baffle ring (12) position, baffle (11) can only upwards swing by horizontal position, when second piston board (7) remove to downside baffle ring (12) position, baffle (11) can only down swing by horizontal position.
2. The transformer tank pressure regulating device according to claim 1, wherein the baffle plate (11) is hinged at the right end of the through hole (10), a rectangular hole (13) penetrating through the upper end face and the lower end face is formed below the baffle ring (12) at the left side of the second piston plate (7), an upper transverse hole (14) and a lower transverse hole (14) are formed at the right end face of the rectangular hole (13), the transverse holes (14) penetrate through the left end face of the through hole (10) rightward, a stop lever (15) capable of sliding left and right along the transverse holes (14) is arranged in each transverse hole (14), when the right end of the upper stop lever (15) is arranged in the through hole (10), the baffle plate (11) can be prevented from swinging upwards in the horizontal direction, and when the right end of the lower stop lever (15) is arranged in the through hole (10), the baffle plate (11) can be prevented from swinging downwards in the horizontal direction;
a slide bar (16) with the length larger than that of the rectangular hole (13) is arranged in the rectangular hole (13), the side face of the slide bar (16) is in fit sealing with the rectangular hole (13) and can slide up and down along the rectangular hole (13), an upper yielding hole (17) and a lower yielding hole (17) are formed in the right end face of the slide bar (16), when the upper end of the slide bar (16) is level with the upper end face of the second piston plate (7), the cross bar (15) on the upper side can move leftwards into the yielding hole (17) on the upper side, meanwhile, the right end of the cross bar (15) on the upper side does not swing upwards on the blocking baffle (11), when the lower end of the slide bar (16) is level with the lower end face of the second piston plate (7), the cross bar (15) on the lower side can move leftwards into the yielding hole (17), and meanwhile, the right end of the cross bar (15) on the lower side is not swung downwards on the blocking baffle (111).
3. The transformer tank pressure regulating device according to claim 1, wherein the normal vector of the left end face of the stop lever (15) on the upper side is inclined leftwards and downwards, and the normal vector of the right end face is inclined rightwards and downwards; the normal vector of the left end face of the stop lever (15) at the lower side is inclined leftwards and upwards, and the normal vector of the right end face is inclined rightwards and upwards.
4. The transformer tank pressure regulating device according to claim 1, wherein a torsion spring is arranged at the hinge position of the baffle plate (11) and the through hole (10), and the torsion spring enables the baffle plate (11) to always receive torsion force for keeping a horizontal state.
5. The transformer tank pressure regulating device according to claim 1, wherein a first air vent (18) communicated with the first cavity (3) is formed in the upper end face of the shell (1), a cover plate (19) is arranged at the upper end of the first air vent (18), and the cover plate (19) is in clearance fit with the upper end face of the shell (1) and fixedly connected with the upper end face of the shell through a supporting rod; second ventilation holes (20) communicated with the second cavity (4) are respectively formed in the left side and the right side of the lower end face of the shell (1).
6. A transformer tank pressure regulating device according to claim 1, characterized in that the length of the vertical rod (8) is larger than the vertical displacement of the second piston plate (7), so that when the first piston plate (6) moves to the lowest end along with the second piston plate (7), a space exists between the first piston plate (6) and the partition plate (2).
7. The transformer tank pressure regulating device according to claim 1, wherein the left end of the housing (1) is provided with an oil supplementing port (21) communicated with the upper half section of the second cavity (4), and a flange cover (22) for sealing the oil supplementing port (21) is arranged outside the oil supplementing port (21).
8. A transformer tank pressure regulating device according to claim 1, characterized in that the cross section of the through hole (10) and the cross section of the baffle (11) are rectangular.
9. A method of installing a transformer tank pressure regulating device as claimed in any one of claims 1 to 8, comprising the steps of:
s1, communicating the lower end of a vertical pipe (5) with the upper end face of an oil immersed transformer oil tank, and filling the vertical pipe (5) with transformer oil;
s2, setting the distance between two baffle rings (12), and being suitable for transformer oil tanks with different volumes, ensuring that the positive pressure or negative pressure value when the second piston plate (7) moves to the position of the baffle rings (12) is the minimum positive pressure or negative pressure value affecting the air tightness of the transformer;
s3, according to different seasons during installation, the initial positions of the second piston plate (7) and the sliding rod (16) are also different, in order to ensure the subsequent use precision, the second piston plate (7) is arranged at the middle position between the two baffle rings (12) in spring and autumn, the lower end face of the sliding rod (16) is flush with the lower end face of the second piston plate (7) in spring, and the upper end face of the sliding rod (16) is flush with the upper end face of the second piston plate (7) in autumn;
and S4, filling transformer oil into a cavity between the first piston plate (6), the second piston plate (7) and the third piston plate (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310462548.7A CN116453815A (en) | 2023-04-26 | 2023-04-26 | Transformer oil tank pressure regulating device and installation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310462548.7A CN116453815A (en) | 2023-04-26 | 2023-04-26 | Transformer oil tank pressure regulating device and installation method |
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| Publication Number | Publication Date |
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| CN116453815A true CN116453815A (en) | 2023-07-18 |
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|---|---|---|---|
| CN202310462548.7A Pending CN116453815A (en) | 2023-04-26 | 2023-04-26 | Transformer oil tank pressure regulating device and installation method |
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| Country | Link |
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