CN114999796B - Coil structure of SCB14 type dry-type power transformer with non-circular coil - Google Patents
Coil structure of SCB14 type dry-type power transformer with non-circular coil Download PDFInfo
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- CN114999796B CN114999796B CN202210870597.XA CN202210870597A CN114999796B CN 114999796 B CN114999796 B CN 114999796B CN 202210870597 A CN202210870597 A CN 202210870597A CN 114999796 B CN114999796 B CN 114999796B
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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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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Abstract
The invention discloses a coil structure of a non-circular coil SCB14 dry-type power transformer, which comprises an inner insulating ring body, an outer rectangular insulator, support bars, wire holes and a quick connecting device, wherein the inner insulating ring body is sleeved on a power transformer mounting shaft, the outer wall of the inner insulating ring body is fixedly sleeved with the outer rectangular insulator, a conductive coil is arranged in an inner cavity formed between the inner insulating ring body and the outer rectangular insulator, the support bars are arranged at the upper end and the lower end of the outer rectangular insulator and are arranged around the circumference of the inner insulating ring body, and the quick connecting device is arranged between the inner ring wall of the inner insulating ring body and the power transformer mounting shaft. In the use, can install the dry-type transformer with the internal insulation ring body fast through quick connecting device, conveniently change and maintain this dry-type transformer coil structure, wherein, the steadiness of whole conductive coil is strengthened in setting up of support coil, simultaneously, increases the air duct pipe on low voltage coil, reinforcing radiating effect.
Description
Technical Field
The invention relates to the technical field of packaging detection, in particular to a coil structure of a non-circular coil SCB14 dry-type power transformer.
Background
With the high-speed development of economy in China, the power loads at all levels in a power distribution system are continuously increased, the living standard of people is continuously improved, and the requirements on power supply reliability and power quality are higher and higher. The power transformer is key equipment for realizing electric energy conversion in a power transmission and distribution system, and is free of oil, fireproof, long in service life, energy-saving, low in noise, simple to maintain, safe and reliable.
The dry transformer of SCB14 type is one of transformers, mainly uses air as an insulating medium and a heat dissipation medium, and a coil structure is the most core component of the dry power transformer and is used for realizing electric energy conversion and ensuring the safe operation of devices. The existing transformer coil structure is usually connected with a dry-type transformer through bolts, and the bolts are loosened due to vibration or rusted in the long-time use process, so that the replacement and the maintenance are very inconvenient, and therefore, the coil structure of the SCB14 type dry-type power transformer with the non-circular coil is provided to solve the problems.
Disclosure of Invention
The present invention is directed to a coil structure for a non-circular coil SCB14 type dry power transformer to solve the problems set forth in the background above.
In order to achieve the purpose, the invention provides the following technical scheme: a coil structure for a non-circular coil, SCB14 type dry power transformer, comprising: the inner insulation ring body, outer rectangular insulator, the support bar, line hole and quick connecting device, the inner insulation ring body cup joints in power transformer installation epaxial, the outer rectangular insulator of inner insulation ring body outer wall fixed cup joint, and be equipped with the conductive coil in the inner chamber that forms between inner insulation ring body and the outer rectangular insulator, the upper and lower both ends of outer rectangular insulator are located to a plurality of support bars, and set up around inner insulation ring body circumference, be equipped with quick connecting device between the interior rampart of inner insulation ring body and the power transformer installation axle.
Preferably, the conductive coil comprises: the high-voltage coil is sleeved on the outer wall of the low-voltage coil, and the supporting coil is sleeved outside the high-voltage coil.
Preferably, a plurality of groups of hollow air channel pipes for heat dissipation are arranged in the low-voltage coil.
Preferably, the outer rectangular insulator and the support coil are regular octagons, and the high-voltage coil and the low-voltage coil are annular.
Preferably, a wire hole for connecting a wire is provided on either side of the outer rectangular insulator.
Preferably, the outer wall of the installation shaft of the power transformer is provided with a plurality of quick connecting devices, and the quick connecting devices are sequentially arranged at equal intervals from top to bottom.
Preferably, the quick-connect means comprises: the hydraulic oil cylinder is connected with the hydraulic oil plug I and the hydraulic oil plug II through the connecting spring;
the mounting plate is fixedly connected to the outer wall of a mounting shaft of the power transformer, the two groups of hydraulic oil columns are symmetrically and fixedly connected to the upper surface of the mounting plate, two groups of hydraulic oil plugs I are arranged inside the hydraulic oil columns, and the hydraulic oil plugs I are connected with the inner wall of the hydraulic oil columns in a sliding mode;
the opposite ends of the two groups of hydraulic oil plugs I are fixedly connected with piston rods I extending to the outside of the hydraulic oil column, and one ends of the piston rods I extending to the outside of the hydraulic oil column are hinged with the driving arc sheets;
one side of the driving arc piece close to the inner wall of the inner insulating ring body is fixedly connected with a rubber braking arc piece;
two groups of hydraulic oil tanks are symmetrically and fixedly connected to the upper surface of the mounting plate, a second hydraulic oil plug is arranged in each hydraulic oil tank and is in sliding connection with the inner wall of each hydraulic oil tank, one end, close to each hydraulic oil tank, of the first connecting rod movably penetrates through each hydraulic oil tank and is fixedly connected with the second hydraulic oil plug, and one end, far away from each hydraulic oil tank, of the first connecting rod is fixedly connected with the U-shaped connecting rod;
the two groups of connecting springs are symmetrically arranged between the two groups of driving arc pieces, and two ends of each connecting spring are fixedly connected with the two groups of driving arc pieces respectively;
the U-shaped connecting rod is rotationally connected with the roller, and the outer circular surface of the roller is flush with the middle part of the rubber braking arc sheet;
the hydraulic oil tank is connected with the hydraulic oil column through a connecting oil pipe.
Preferably, the coil protection device is installed at the bottom of the outer rectangular insulator, and comprises: protective housing, bolted connection ear, the buffering circle, the protection component, the arc apron, the protective housing upper end is equipped with a plurality of bolted connection ears, and outer rectangular insulator bottom is equipped with the screw hole corresponding with the bolted connection ear, protective housing installs in outer rectangular insulator bottom under the cooperation of bolt and bolted connection ear, buffering circle and protective housing inner wall fixed connection, arc apron and buffering circle fixed connection, buffering circle and protective housing and arc apron form the installation cavity, the protection component is located in the installation cavity.
Preferably, the protection assembly comprises: the heat dissipation device comprises a bearing plate, a bearing strip, a heat dissipation arc groove, a buffer head, a second connecting rod, a positioning concave hole, a base, a first support plate, a buffer spring, a rubber cushion block, a bearing rod and a second support plate;
the upper end of the bearing plate is provided with a heat dissipation arc groove, the upper end of the bearing strip is symmetrically and fixedly connected with two groups of buffer heads, the bottom of the bearing strip is fixedly connected with two groups of second connecting rods, and the second connecting rods slidably penetrate through the bearing plate;
two groups of positioning concave holes are symmetrically arranged at the upper end of the second support plate, and the positioning concave holes and the second connecting rod are positioned on the same axis;
the rubber cushion block is fixedly connected to the middle of the upper end of the second support plate, and a first gap is reserved between the upper end of the second support plate and the lower end of the bearing plate;
the first supporting plate is positioned below the second supporting plate, two groups of pressure-bearing rods are symmetrically and fixedly connected to the upper end of the first supporting plate, the upper ends of the pressure-bearing rods movably penetrate through the second supporting plate, and a second gap is reserved between the upper ends of the pressure-bearing rods and the lower ends of the pressure-bearing plates;
the buffer spring is arranged between the first support plate and the second support plate, and two ends of the buffer spring are fixedly connected with the upper end of the first support plate and the lower end of the second support plate respectively;
the base, the protective shell and the arc-shaped cover plate form a fixed connection with the inner wall of the installation cavity.
Preferably, a plurality of fixing ribs for supporting are arranged around the outer ring wall of the base, an annular through groove for heat dissipation is formed between every two fixing ribs, and a bearing plate embedding groove with the same diameter as the bearing plate is arranged at the upper end of the base;
the first gap has a longitudinal distance greater than the second gap longitudinal distance.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic view of the installation position of the quick connect apparatus of the present invention;
FIG. 4 is a schematic top view of the quick connect apparatus of the present invention;
FIG. 5 is a schematic three-dimensional structure of the driving arc piece of the present invention;
FIG. 6 is a schematic view of the protection device according to the present invention;
fig. 7 is a schematic structural diagram of a protection component according to the present invention.
In the figure: 1. an inner insulating ring body; 101. a power transformer mounting shaft; 2. an outer rectangular insulator; 201. a coil protection device; 3. a supporting strip; 4. a wire hole; 5. a support coil; 6. a high-voltage coil; 7. a low-voltage coil; 8. a hollow airway tube; 9. a quick connect device; 10. mounting a plate; 11. a first hydraulic oil plug; 12. a hydraulic oil column; 13. a first piston rod; 14. driving the arc sheet; 15. a rubber brake arc sheet; 16. a roller; 17. a U-shaped connecting rod; 18. a first link; 19. a second hydraulic oil plug; 20. a hydraulic oil tank; 21. a connecting spring; 22. connecting an oil pipe; 23. a protective housing; 24. the lug is connected by a bolt; 25. a buffer ring; 26. a protection component; 27. an arc-shaped cover plate; 28. a pressure bearing plate; 29. a pressure-bearing strip; 30. a heat dissipation arc groove; 31. a buffer head; 32. a second link; 33. positioning concave holes; 34. a base; 35. a fixing rib; 36. a first support plate; 37. a buffer spring; 38. a rubber cushion block; 39. a pressure-bearing rod; 40. an annular through groove; 41. the bearing plate is embedded in the groove; 42. and a second supporting plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Example 1
Referring to fig. 1-2, the present invention provides a technical solution, including: the method comprises the following steps: interior insulation ring body 1, outer rectangular insulator 2, support bar 3, line hole 4 and quick connecting device, interior insulation ring body 1 cup joints on power transformer installation axle 101, the fixed cover of 1 outer wall of interior insulation ring body has connect outer rectangular insulator 2, and be equipped with the conductive coil in the inner chamber that forms between interior insulation ring body 1 and the outer rectangular insulator 2, the upper and lower both ends of outer rectangular insulator 2 are located to a plurality of support bars 3, and set up around 1 circumference of interior insulation ring body, be equipped with quick connecting device 9 between the interior rampart of interior insulation ring body 1 and power transformer installation axle 101.
Preferably, the conductive coil comprises: support coil 5, high-voltage coil 6 and low voltage coil 7, low voltage coil 7 encircles in the outer wall of internal insulation ring body 1, and high voltage coil 6 cup joints at low voltage coil 7 outer wall, and support coil 5 cup joints outside high voltage coil 6.
Preferably, several groups of hollow air duct pipes 8 for heat dissipation are provided in the low voltage coil 7.
Preferably, the outer rectangular insulator 2 and the support coil 5 are regular octagonal, and the high voltage coil 6 and the low voltage coil 7 are ring-shaped.
Preferably, a wire hole 4 for connecting a wire is provided on either side of the outer rectangular insulator 2.
The working principle and the beneficial effects of the technical scheme are as follows: the low-voltage coil 7 is wound on the outer wall of the inner insulation ring body 1 to form a cylinder shape, then the high-voltage coil 6 and the supporting coil 5 are sequentially wound on the outer wall of the low-voltage coil 7 to form a conductive coil, the outer rectangular insulator 2 is fixedly sleeved on the outer side of the conductive coil to form a dry-type transformer coil structure, the outer rectangular insulator 2 is wrapped on the outer side of the conductive coil after being fixedly formed, and the conductive coil can be prevented from being damaged in the production and transportation processes, so that a good protection effect is achieved. In the use, can install dry-type transformer with interior insulation ring body 1 fast through quick connecting device 9, conveniently change and maintain this dry-type transformer coil structure, wherein, the steadiness of whole conductive coil is strengthened in setting up of support coil 5, simultaneously, increases air duct pipe 8 on low voltage coil 7, reinforcing radiating effect.
Example 2
On the basis of embodiment 1, please refer to fig. 3-5, the outer wall of the power transformer mounting shaft 101 is provided with a plurality of quick connectors 9, and the plurality of quick connectors are arranged in sequence at equal intervals from top to bottom.
Preferably, the quick connection means 9 comprise: the hydraulic brake device comprises a mounting plate 10, a first hydraulic oil plug 11, a hydraulic oil column 12, a first piston rod 13, a driving arc sheet 14, a rubber brake arc sheet 15, a roller 16, a U-shaped connecting rod 17, a first connecting rod 18, a second hydraulic oil plug 19, a hydraulic oil tank 20, a connecting spring 21 and a connecting oil pipe 22;
the mounting plate 10 is fixedly connected to the outer wall of the mounting shaft 101 of the power transformer, the two groups of hydraulic oil columns 12 are symmetrically and fixedly connected to the upper surface of the mounting plate 10, two groups of hydraulic oil plugs I11 are arranged inside the hydraulic oil columns 12, and the hydraulic oil plugs I11 are connected with the inner wall of the hydraulic oil columns 12 in a sliding mode;
the opposite ends of the two groups of hydraulic oil plugs I11 are fixedly connected with piston rods I13 extending to the outside of the hydraulic oil column 12, and one ends of the piston rods I13 extending to the outside of the hydraulic oil column 12 are hinged with the driving arc pieces 14;
one side of the driving arc piece 14 close to the inner wall of the inner insulating ring body 1 is fixedly connected with a rubber braking arc piece 15;
two groups of hydraulic oil tanks 20 are symmetrically and fixedly connected to the upper surface of the mounting plate 10, a second hydraulic oil plug 19 is arranged inside the hydraulic oil tank 20, the second hydraulic oil plug 19 is in sliding connection with the inner wall of the hydraulic oil tank 20, one end, close to the hydraulic oil tank 20, of the first connecting rod 18 movably penetrates through the hydraulic oil tank 20 and is fixedly connected with the second hydraulic oil plug 19, and one end, far away from the hydraulic oil tank 20, of the first connecting rod 18 is fixedly connected with the U-shaped connecting rod 17;
the two groups of connecting springs 21 are symmetrically arranged between the two groups of driving arc pieces 14, and two ends of the connecting springs 21 are respectively and fixedly connected with the two groups of driving arc pieces 14;
the U-shaped connecting rod 17 is rotatably connected with the roller 16, and the outer circular surface of the roller 16 is flush with the middle part of the rubber braking arc sheet 15;
the hydraulic oil tank 20 is connected to the hydraulic oil column 12 through a connecting oil pipe 22.
The working principle and the beneficial effects of the technical scheme are as follows: when the coil is installed on a power transformer, firstly, the inner insulating ring body 1 is sleeved on the outer wall of a power transformer installation shaft 101, at the moment, the inner insulating ring body 1 and the power transformer installation shaft 101 are in a movable state, the outer end face of the roller 16 is kept flush with the outer side face of the rubber braking arc sheet 15, in order to fix the inner insulating ring body 1 and the power transformer installation shaft 101, at the moment, hydraulic oil is injected into the hydraulic oil column 12, two groups of hydraulic oil plugs 11 move towards the directions away from each other under the action of the hydraulic oil, the rubber braking arc sheet 15 is in contact friction with the inner wall of the inner insulating ring body 1 through the piston rods 13 and the driving arc sheets 14, the inner insulating ring body 1 is locked to prevent the inner insulating ring body 1 from moving, after long-time use, the rubber braking arc sheet 15 is pressed to deform or become thinner due to multiple times of friction, at the moment, the roller 16 is not flush with the rubber braking arc sheet 15, at this time, hydraulic oil needs to be replenished into the hydraulic oil tank 20, at this time, the second hydraulic oil plug 19 drives the first connecting rod 18 and the U-shaped connecting rod 17 to move under the action of the hydraulic oil pressure, so that the two groups of driving arc pieces 14 drive the rubber braking arc pieces 15 to expand outwards and the rubber braking arc pieces 15 gradually contact the inner side wall of the inner insulating ring body 1, and because the rubber braking arc pieces 15 are worn, the roller 16 firstly contacts the inner side wall of the inner insulating ring body 1, so that the volume of the hydraulic oil contained in the hydraulic oil tank 20 is increased, the hydraulic oil is replenished into the hydraulic oil tank 20 and can enter the hydraulic oil column 12 through the connecting oil pipe 22, at this time, the oil in the hydraulic oil column 12 is increased, so that the first two hydraulic oil plugs 11 in the hydraulic oil tank start to move in the directions away from each other, and the movement of the first hydraulic oil plugs 11 can enable the first piston rod 13 to drive the driving arc pieces 14 to move, and then make the back rubber braking arc piece 15 of wearing and tearing flush with gyro wheel 16 once more, guaranteed to carry out automatic position filling after 16 wearing and tearing of gyro wheel at every turn for the interval of the lateral wall of gyro wheel 16 and 1 inner walls of internal insulation ring body remains unchanged throughout, guaranteed the invariant of locking state, avoided leading to the condition that locking state weakens because of the 15 wearing and tearing attenuation of rubber braking arc piece, the result of use is better.
Through the setting of this structure, can fix the coil from coil inside, and pressure is invariable, has avoided the bolt can be not hard up because of vibrations production, perhaps the bolt can take place the condition of corrosion in long-time use, has improved the security of this coil.
Example 3
Referring to fig. 1 and 6 to 7, a coil protector 201 is mounted on the bottom of the outer rectangular insulator 2, the coil protector 201 comprising: protective housing 23, bolt connection ear 24, buffering circle 25, protection component 26, arc apron 27, protective housing 23 upper end is equipped with a plurality of bolt connection ears 24, and 2 bottoms of outer rectangular insulator are equipped with the corresponding screw hole with bolt connection ear 24, protective housing 23 is installed in 2 bottoms of outer rectangular insulator under the cooperation of bolt and bolt connection ear 24, buffering circle 25 and 23 inner wall fixed connection of protective housing, arc apron 27 and buffering circle 25 fixed connection, buffering circle 25 and protective housing 23 and arc apron 27 form the installation cavity, protection component 26 is located in the installation cavity.
Preferably, the protective assembly 26 comprises: the device comprises a bearing plate 28, a bearing strip 29, a heat dissipation arc groove 30, a buffer head 31, a second connecting rod 32, a positioning concave hole 33, a base 34, a first support plate 36, a buffer spring 37, a rubber cushion block 38, a bearing rod 39 and a second support plate 42;
the upper end of the bearing plate 28 is provided with a heat dissipation arc groove 30, the upper end of the bearing strip 29 is symmetrically and fixedly connected with two groups of buffer heads 31, the bottom pair of the bearing strip 29 is fixedly connected with two groups of second connecting rods 32, and the second connecting rods 32 penetrate through the bearing plate 28 in a sliding manner;
two groups of positioning concave holes 33 are symmetrically arranged at the upper end of the second support plate 42, and the positioning concave holes 33 and the second connecting rod 32 are positioned on the same axis;
the rubber cushion block 38 is fixedly connected to the middle of the upper end of the second support plate 42, and a first gap is reserved between the upper end of the second support plate 42 and the lower end of the bearing plate 28;
the first support plate 36 is positioned below the second support plate 42, the upper end of the first support plate 36 is symmetrically and fixedly connected with two groups of pressure-bearing rods 39, the upper ends of the pressure-bearing rods 39 movably penetrate through the second support plate 42, and a second gap is reserved between the upper ends of the pressure-bearing rods 39 and the lower end of the pressure-bearing plate 28;
the buffer spring 37 is arranged between the first support plate 36 and the second support plate 42, and two ends of the buffer spring 37 are respectively and fixedly connected with the upper end of the first support plate 36 and the lower end of the second support plate 42;
the base 34 forms a fixed connection with the protective shell 23 and the arc-shaped cover plate 27 on the inner wall of the installation cavity.
Preferably, a plurality of fixing ribs 35 for supporting are arranged around the outer ring wall of the base 34, an annular through groove 40 for heat dissipation is formed between every two fixing ribs 35, and a bearing plate caulking groove 41 with the same diameter as the bearing plate 28 is arranged at the upper end of the base 34;
the first gap has a longitudinal distance greater than the second gap longitudinal distance.
The working principle and the beneficial effects of the scheme are as follows: firstly, the protective shell 23 is mounted at the bottom of the outer rectangular insulator 2 under the matching of the bolts and the bolt connecting lugs 24, then the coil is mounted on the power transformer mounting shaft 101, the protective shell 23 is positioned on the ground or a support frame of the power transformer, at the moment, when the power transformer is carried, the pressure (namely, the shaking generated in the carrying process) applied to the coil firstly extrudes the buffer ring 25, as the buffer ring 25 is made of a material with elastic deformation, a part of pressure is absorbed and diffused to the periphery when the buffer ring 25 is pressed, then the rest pressure is transferred to the protective shell 23 and the arc-shaped cover plate 27 to form the protective component 26 in the mounting cavity after the buffer ring 25 is pressed and compressed, at the moment, the buffer head 31 is pressed to press the second connecting rod 32 downwards, so that the pressure-bearing strip 29 is abutted to the top of the pressure-bearing plate 28, and the second link 32 will fall into the positioning concave hole 33 to prevent it from deflecting, at the same time, the pressure-bearing plate 28 will move downwards under the action of the pressure-bearing strip 29 and make the pressure-bearing plate 28 enter the pressure-bearing plate caulking groove 41, and because the longitudinal distance of the first gap is greater than the longitudinal distance of the second gap, the bottom of the pressure-bearing plate 28 will first abut against the pressure-bearing rod 39 to perform secondary buffering, when the pressure makes the pressure-bearing plate 28 continue to move downwards, the pressure-bearing plate 28 will abut against the rubber pad 38, after passing through the third buffering of the rubber pad 38, the second support plate 42 will compress the buffer spring 37, so that the buffer spring 37 absorbs the kinetic potential energy, wherein, in the static state, the pressure-bearing plate 28 and the pressure-bearing plate caulking groove 41 are separated from each other, the annular through groove 40 and the pressure-bearing plate caulking groove 41 can perform auxiliary heat dissipation to the heat generated when the coil is supplying current, when bearing dynamic pressure, the pressure plate 28 can distribute the pressure to the base 34 through the pressure plate caulking groove 41, and the heat generated by the relative movement between the parts can be dissipated through the heat dissipating arc groove 30 after the pressure plate 28 and the pressure plate caulking groove 41 are closed.
The arrangement of the device can ensure that the high-voltage/low-voltage coil inside the coil is protected from being damaged when the coil is in the transportation process or is arranged on the support frame of the power transformer, thereby improving the safety.
Example 4
On the basis of any one of embodiments 1 to 3, the method further comprises the following steps:
the flow velocity sensor is arranged at the air outlet of the hollow air channel pipe 8 and used for detecting the flow velocity of the air which is released by the air outlet of the hollow air channel pipe 8 when the low-voltage coil 7 works;
a temperature sensor disposed inside the outer rectangular insulator 2 for detecting a temperature inside the outer rectangular insulator 2;
a timer, arranged in the outer rectangular insulator 2, for detecting the energization time of the coil;
the alarm is arranged on the outer surface of the outer rectangular insulator 2;
the controller, the controller sets up 2 surfaces of outer rectangular insulator, the controller respectively with flow rate sensor, temperature sensor, time-recorder and alarm electric connection, the controller is based on flow rate sensor, temperature sensor, time-recorder control alarm work includes:
step 1: the controller obtains the air convection error ratio coefficient of the heat passing through the hollow air channel pipe 8 when the low-voltage coil 7 works based on the flow rate sensor, the temperature sensor, the timer and the formula (1):
wherein X is the air convection error ratio coefficient of heat passing through the hollow air channel pipe 8 when the low-voltage coil 7 works, S 1 Is the area of the air outlet hole of the hollow air duct pipe 8, S 2 The total area of the outer rectangular insulator 2 in contact with air, L 1 Thickness, V, of the outer rectangular insulator 2 1 Is the detected value of the flow rate sensor, V 2 Is a preset indoor air flow rate, K is room temperature, K 1 As a value detected by the temperature sensor, C 1 Specific heat capacity of the low-voltage coil 7, C 2 The specific heat capacity of the outer rectangular insulator 2, and T is a detection value of a timer;
step 2: based on step 1, calculating the heat dissipation coefficient of the coil structure by formula (2):
wherein Y is the heat dissipation coefficient of the coil structure,
is the heat transfer coefficient of the inner insulating ring body 1,
the coefficient of heat transfer of the outer rectangular insulator 2 is shown, e is a natural constant and is 2.72, delta is a correction coefficient (the value is more than 0 and less than 1 and is set by considering the factors of the use environment of the coil structure), and ln is a natural logarithm;
step three: and (3) comparing the heat dissipation coefficient of the coil structure calculated in the step (2) with a preset heat dissipation coefficient of the coil structure by the controller, and controlling the alarm to give an alarm by the controller when the heat dissipation coefficient of the coil structure calculated in the step (2) is smaller than the preset heat dissipation coefficient of the coil structure.
Suppose, S 1 ＝0.03m 2 ，S 2 ＝0.2m 2 ，L 1 ＝0.03m，V 1 ＝0.021m/s，V 2 ＝0.01m/s，K＝26℃，K 1 ＝45℃，C 1 ＝2.8×10 3 J/kg*℃，C 2 ＝3.6×10 3 J/kg × c, T =24h, and the air convection error ratio coefficient X =1.76 (two decimal points are taken) of the heat quantity when the low-voltage coil 7 operates through the hollow air duct pipe 8 is calculated by the formula (1).
It is assumed that,
Δ =0.8, and the heat dissipation coefficient Y =0.67 (two decimal places) of the coil structure was calculated by formula (2).
The working principle and the beneficial effects of the scheme are as follows: wherein,
the influence of air on the flow caused by the difference between the flow rate through the air outlet of the hollow air duct 8 and the indoor air flow rate when heat flows through the positionIn the state (c) of the mobile communication terminal,
showing the influence on the dissipation of heat by the factors of the materials of the inner insulating ring body 1 and the outer rectangular insulator 2 and the combination of the sizes thereof, the dissipation of heat will be faster and faster with the continuous increase of X, and then according to the material of the inner insulating ring body and the outer rectangular insulator 2
The computational result revise it, obtain this loop construction's heat dissipation coefficient at last, utilize velocity of flow sensor, temperature sensor, time-recorder detect the air flow rate of air duct pipe 8 exit hole department in, the controller utilizes formula (1) and formula (2) to calculate this loop construction's heat dissipation coefficient, if this loop construction's heat dissipation coefficient is less than when the heat dissipation coefficient of predetermined loop construction, controller control the alarm sends out the police dispatch newspaper, reminds the user to inspect the holistic heat dispersion of this loop construction, has improved the security and the intellectuality of device.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. A coil structure of a non-circular coil SCB14 type dry power transformer, characterized in that:
the method comprises the following steps: the power transformer mounting structure comprises an inner insulation ring body (1), outer rectangular insulators (2), support bars (3), wire holes (4) and a quick connecting device, wherein the inner insulation ring body (1) is connected to a power transformer mounting shaft (101) in a sleeved mode, the outer rectangular insulators (2) are fixedly connected to the outer wall of the inner insulation ring body (1) in a sleeved mode, conductive coils are arranged in an inner cavity formed between the inner insulation ring body (1) and the outer rectangular insulators (2), the support bars (3) are arranged at the upper end and the lower end of the outer rectangular insulators (2) and are arranged around the inner insulation ring body (1) in the circumferential direction, and the quick connecting device (9) is arranged between the inner ring wall of the inner insulation ring body (1) and the power transformer mounting shaft (101);
the outer wall of the power transformer mounting shaft (101) is provided with a plurality of quick connecting devices (9), and the quick connecting devices (9) are sequentially arranged at equal intervals from top to bottom;
the quick-connection device (9) comprises: the hydraulic brake device comprises a mounting plate (10), a first hydraulic oil plug (11), a hydraulic oil column (12), a first piston rod (13), a driving arc sheet (14), a rubber brake arc sheet (15), a roller (16), a U-shaped connecting rod (17), a first connecting rod (18), a second hydraulic oil plug (19), a hydraulic oil tank (20), a connecting spring (21) and a connecting oil pipe (22);
the mounting plate (10) is fixedly connected to the outer wall of a power transformer mounting shaft (101), the two groups of hydraulic oil columns (12) are symmetrically and fixedly connected to the upper surface of the mounting plate (10), two groups of hydraulic oil plugs I (11) are arranged inside the hydraulic oil columns (12), and the hydraulic oil plugs I (11) are in sliding connection with the inner wall of the hydraulic oil columns (12);
the opposite ends of the two groups of hydraulic oil plugs I (11) are fixedly connected with piston rods I (13) extending to the outside of the hydraulic oil column (12), and one ends of the piston rods I (13) extending to the outside of the hydraulic oil column (12) are hinged to the driving arc sheets (14);
one side of the driving arc piece (14) close to the inner wall of the inner insulation ring body (1) is fixedly connected with a rubber braking arc piece (15);
two groups of hydraulic oil tanks (20) are symmetrically and fixedly connected to the upper surface of the mounting plate (10), a second hydraulic oil plug (19) is arranged inside each hydraulic oil tank (20), the second hydraulic oil plugs (19) are connected with the inner wall of each hydraulic oil tank (20) in a sliding manner, one end, close to each hydraulic oil tank (20), of the first connecting rod (18) movably penetrates through each hydraulic oil tank (20) and is fixedly connected with the second hydraulic oil plugs (19), and one end, far away from each hydraulic oil tank (20), of the first connecting rod (18) is fixedly connected with the U-shaped connecting rod (17);
two groups of connecting springs (21) are symmetrically arranged between the two groups of driving arc pieces (14), and two ends of the connecting springs (21) are respectively and fixedly connected with the two groups of driving arc pieces (14);
the U-shaped connecting rod (17) is rotationally connected with the roller (16), and the outer circular surface of the roller (16) is flush with the middle part of the rubber braking arc sheet (15);
the hydraulic oil tank (20) is connected with the hydraulic oil column (12) through a connecting oil pipe (22).
2. The coil structure of a non-circular coil, SCB14 type dry power transformer, according to claim 1, wherein:
the electrically conductive coil includes: support coil (5), high-voltage coil (6) and low-voltage coil (7), low-voltage coil (7) encircle in internal insulation ring body (1) outer wall, and high-voltage coil (6) cup joint in low-voltage coil (7) outer wall, and support coil (5) cup joint in high-voltage coil (6) outside.
3. The coil structure of a non-circular coil SCB14 type dry power transformer as claimed in claim 2, wherein:
a plurality of groups of hollow air channel pipes (8) for heat dissipation are arranged in the low-voltage coil (7).
4. The coil structure of a non-circular coil SCB14 type dry power transformer as claimed in claim 3, wherein:
the outer rectangular insulator (2) and the supporting coil (5) are regular octagons, and the high-voltage coil (6) and the low-voltage coil (7) are annular.
5. The coil structure of a non-circular coil SCB14 type dry power transformer as claimed in claim 4, wherein:
any surface of the outer rectangular insulator (2) is provided with a wire hole (4) for connecting a cable.
6. The coil structure of a non-circular coil SCB14 type dry power transformer as claimed in claim 1, wherein:
the coil protection device (201) is installed to outer rectangular insulator (2) bottom, and coil protection device (201) includes: protective housing (23), bolt engaging lug (24), buffering circle (25), protection component (26), arc apron (27), protective housing (23) upper end is equipped with a plurality of bolt engaging lugs (24), and outer rectangular insulator (2) bottom is equipped with the screw hole corresponding with bolt engaging lug (24), install in outer rectangular insulator (2) bottom under the cooperation of bolt and bolt engaging lug (24) protective housing (23), buffering circle (25) and protective housing (23) inner wall fixed connection, arc apron (27) and buffering circle (25) fixed connection, buffering circle (25) and protective housing (23) and arc apron (27) form the installation cavity, protection component (26) are located in the installation cavity.
7. The coil structure of a non-circular coil SCB14 type dry power transformer as claimed in claim 6, wherein:
the protection assembly (26) comprises: the device comprises a bearing plate (28), a bearing strip (29), a heat dissipation arc groove (30), a buffering head (31), a second connecting rod (32), a positioning concave hole (33), a base (34), a first support plate (36), a buffering spring (37), a rubber cushion block (38), a bearing rod (39) and a second support plate (42);
the upper end of the bearing plate (28) is provided with a heat dissipation arc groove (30), the upper end of the bearing strip (29) is symmetrically and fixedly connected with two groups of buffer heads (31), the bottom of the bearing strip (29) is fixedly connected with two groups of second connecting rods (32), and the second connecting rods (32) penetrate through the bearing plate (28) in a sliding manner;
two groups of positioning concave holes (33) are symmetrically formed in the upper end of the second support plate (42), and the positioning concave holes (33) and the second connecting rod (32) are located on the same axis;
the rubber cushion block (38) is fixedly connected to the middle of the upper end of the second support plate (42), and a first gap is reserved between the upper end of the second support plate (42) and the lower end of the bearing plate (28);
the first support plate (36) is positioned below the second support plate (42), the upper end of the first support plate (36) is symmetrically and fixedly connected with two groups of pressure-bearing rods (39), the upper ends of the pressure-bearing rods (39) movably penetrate through the second support plate (42), and a second gap is reserved between the upper ends of the pressure-bearing rods (39) and the lower end of the pressure-bearing plate (28);
the buffer spring (37) is arranged between the first support plate (36) and the second support plate (42), and two ends of the buffer spring (37) are fixedly connected with the upper end of the first support plate (36) and the lower end of the second support plate (42) respectively;
the base (34), the protective shell (23) and the arc-shaped cover plate (27) form a fixed connection with the inner wall of the installation cavity.
8. The coil structure of a non-circular coil, SCB14 type dry power transformer, according to claim 7, wherein:
a plurality of fixing ribs (35) for supporting are arranged around the wall of the outer ring of the base (34), an annular through groove (40) for heat dissipation is formed between every two fixing ribs (35), and a bearing plate caulking groove (41) with the same diameter as that of the bearing plate (28) is arranged at the upper end of the base (34);
the longitudinal distance of the first gap is greater than the longitudinal distance of the second gap.
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|---|---|---|---|
| CN202210870597.XA CN114999796B (en) | 2022-07-22 | 2022-07-22 | Coil structure of SCB14 type dry-type power transformer with non-circular coil |
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| CN202210870597.XA CN114999796B (en) | 2022-07-22 | 2022-07-22 | Coil structure of SCB14 type dry-type power transformer with non-circular coil |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2359790Y (en) * | 1998-12-11 | 2000-01-19 | 西安扬子电器有限责任公司 | Magnetic shielding dry-type air reactor |
| CN202076099U (en) * | 2011-06-23 | 2011-12-14 | 新华都特种电气股份有限公司 | Integrative high/low-voltage combined winding for dry type transformer |
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2022
- 2022-07-22 CN CN202210870597.XA patent/CN114999796B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2359790Y (en) * | 1998-12-11 | 2000-01-19 | 西安扬子电器有限责任公司 | Magnetic shielding dry-type air reactor |
| CN202076099U (en) * | 2011-06-23 | 2011-12-14 | 新华都特种电气股份有限公司 | Integrative high/low-voltage combined winding for dry type transformer |
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| CN114999796A (en) | 2022-09-02 |
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Address after: 517400 East Side of East Ring Road, Tangwei Community, Linjiang Industrial Park, Linjiang Town, Jiangdong New District, Heyuan City, Guangdong Province Patentee after: GUANGDONG PENGXIN ELECTRIC TECHNOLOGY CO.,LTD. Country or region after: China Address before: 517000 east side of East Ring Road, Tangwei community, Linjiang Industrial Park, Linjiang Town, Zijin County, Heyuan City, Guangdong Province Patentee before: GUANGDONG PENGXIN ELECTRIC TECHNOLOGY CO.,LTD. Country or region before: China |