A dry-type transformer and working method thereof

Abstract

The present invention discloses a dry-type transformer and a working method thereof, which relates to the technical field of transformers, including an iron core, a winding, a heat dissipation component, a windshield, an adjustment component and a top heat dissipation mechanism, wherein the adjustment component includes a flip pull rod to adjust the angle of the windshield, and the top heat dissipation mechanism is used to ventilate and dissipate heat to the upper end of the winding. The present invention also discloses a transformer working method, including the following steps: power-on operation, cooling, top cooling, and balanced cooling. The present invention arranges an adjustment component and a windshield, and the windshield divides the interior of the fixed frame into two parts. The angle of the windshield is changed by the adjustment component to improve the heat dissipation effect of the transformer. The winding includes an upper positioning ring, a lower positioning ring and a middle positioning ring, which ensure the stability of the coil while allowing hot air to flow upward better, thereby improving the heat dissipation effect of the internal structure of the transformer, and when a single coil generates high temperature, the high-temperature coil is cooled separately.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a dry-type transformer and a working method thereof. Background Art

[0002] Dry-type transformers are transformers that are cooled by air rather than oil. They are mainly used in power systems to convert high voltage into low voltage. They are widely used in local lighting, airports, CNC machinery and equipment, etc.

[0003] The cooling methods of dry-type transformers are divided into natural air cooling and forced air cooling. In natural air cooling, the transformer can operate continuously for a long time at rated capacity, and in forced air cooling, the transformer output capacity can be increased. It is suitable for intermittent overload operation or emergency overload operation.

[0004] For example, the Chinese patent application number 202323003001.5 discloses a heat dissipation assembly for a dry-type transformer, including a heat dissipation air chamber and a fan assembly. The heat dissipation air chamber is formed with an air cavity, and the heat dissipation air chamber is also formed with an air chamber inlet and three air chamber outlets connected to the air cavity. The air cavity is used to accommodate the base of the dry-type transformer, and the three transformer bodies of the dry-type transformer are sealed and penetrated through the three air chamber outlets. The fan assembly is arranged at the air chamber inlet, and the fan assembly can drive air from the air chamber inlet into the air cavity.

[0005] The above technical solution has some problems during use. For example, the technical solution cannot effectively ensure the uniformity of heat dissipation of the transformer, and cannot cool down the high-temperature coil separately when a single coil generates high temperature.

[0006] Therefore, it is necessary to invent a dry-type transformer and a working method thereof to solve the above problems. Summary of the invention

[0007] The object of the present invention is to provide a dry-type transformer and a working method thereof to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solution: a dry-type transformer, comprising an iron core, a winding is sleeved on the outer side of the iron core, and further comprising:

[0009] A heat dissipation component, the heat dissipation component includes an air inlet end and an air outlet end;

[0010] A windshield, which is rotatably connected to the inner wall of the fixing frame and is horizontally placed between the air inlet end and the air outlet end;

[0011] An adjustment assembly is disposed at the upper end of the windshield, and the adjustment assembly includes a flip pull rod, which is rotatably connected to the upper end of the windshield, and the flip pull rod can drive the windshield to flip to adjust the angle of the windshield;

[0012] Temperature sensors are placed at the upper and lower ends of the windshield to detect the temperature difference between the upper and lower sides of the windshield;

[0013] A liquid guide groove is disposed at the lower end of the wind shield plate, and one side of the liquid guide groove passes through the fixing frame;

[0014] A top heat dissipation mechanism is disposed between a plurality of windings and is used for ventilating and dissipating the heat of the upper ends of the windings. The top heat dissipation mechanism includes a positioning frame disposed between two adjacent groups of windings;

[0015] The cooling tube is rotatably connected to the lower end of the positioning frame, and a spring is fixedly connected to one side close to the corresponding winding, and the other end of the spring is in contact with the outer side of the corresponding winding.

[0016] Preferably, each of the windings comprises a high voltage coil and a low voltage coil;

[0017] There are two low-voltage coils inside the high-voltage coil, the high-voltage coil and the low-voltage coil are coaxial, and an insulating tube is provided between them;

[0018] There are multiple windings, two coaxially arranged windings form a group, multiple middle pads are arranged between the two windings in the same group, upper pads are arranged on the upper side of the windings in the same group, and lower pads are arranged on the lower side;

[0019] An air guide tube is provided between the two windings in the same group, and the air guide tube is fixedly connected to the middle cushion block;

[0020] The two windings in the same group are fixedly connected with a ventilation ring on the outside, and an air outlet is provided at a position of the ventilation ring corresponding to the top heat dissipation mechanism, and the lower end of the cooling pipe corresponds to the air outlet;

[0021] A flexible sealing ring is fixedly connected to the lower end of the ventilation ring, one end of which is fixedly connected to the outside of the ventilation ring, and the other end is fixedly connected to the wind shield.

[0022] Preferably, it also includes a fixing frame, a plurality of panels are fixedly connected to the outside of the fixing frame so that the inside of the fixing frame is closed, and the winding and the iron core are fixed inside the fixing frame;

[0023] A lower clamping piece is placed at the lower end of the plurality of coils, the lower side of the iron core is placed between two lower clamping pieces, and a plurality of lower step pads are fixedly connected between the two lower clamping pieces;

[0024] An upper clamping piece is placed at the upper end of the plurality of coils, the upper side of the iron core is placed between two of the upper clamping pieces, and a plurality of upper step pads are fixedly connected between the two upper clamping pieces;

[0025] A high-voltage terminal, which is fixedly connected to one side of the upper clamp, and is provided in plurality, each of which is electrically connected to the high-voltage coil;

[0026] The plurality of high-voltage coils are electrically connected via wires;

[0027] The upper step pad and the lower step pad are both in contact with the iron core and are used to fix the position of the iron core.

[0028] Preferably, the adjustment assembly also includes a driving motor, which is fixedly connected to the upper end of the fixing frame, and the output end is fixedly connected to a stranded wire drum, the outer side of the stranded wire drum is fixedly connected to a connecting wire, and the other end of the connecting wire is fixedly connected to the upper end of the flip pull rod.

[0029] Preferably, a plurality of transverse plates are fixedly connected inside the fixing frame and penetrate through a panel on one side of the fixing frame, and the transverse plates are electrically connected to the low-voltage coil.

[0030] Preferably, the top heat dissipation mechanism further comprises a reset sleeve, which is fixedly connected to the lower end of the positioning frame;

[0031] A reset push rod, which is slidably connected to the inside of the corresponding reset sleeve and can push the corresponding cooling tube to flip;

[0032] A ventilating tube fixedly connected to one end of the reduction sleeve;

[0033] The gas storage part is communicated with the ventilation pipe and is respectively fixedly connected to the outside of the corresponding high-voltage coil;

[0034] The reset rods are respectively fixedly connected to the outside of the cooling tube and are placed on a side of the cooling tube away from the corresponding high-voltage coil. Each of the reset rods is slidably connected to the corresponding flip pull rod.

[0035] Preferably, each of the windings further comprises an upper positioning ring, which is placed at the upper end of the upper low-voltage coil;

[0036] A lower positioning ring, which is placed at the lower end of the lower low-voltage coil;

[0037] A middle positioning ring, which is placed between the two low-voltage coils;

[0038] The upper positioning ring, the lower positioning ring and the middle positioning ring are all used to position the low-voltage coil.

[0039] Preferably, an insulating plate is provided in a fixed sleeve-shaped outer side of the iron core, and is placed between the iron core and the upper clamp and the lower clamp.

[0040] Preferably, a plurality of fans are fixedly connected to the outer side of the lower clamp, and the air outlet of the fans is directed toward the winding.

[0041] The present invention also provides a transformer operating method, comprising the following steps:

[0042] Step 1: Turn on the power and connect the power supply and power-consuming equipment to the high-voltage terminal and the cross plate respectively;

[0043] Step 2: Cool down. Start the heat dissipation component, draw in the hot air from the upper side through the air inlet, and blow it into the lower side of the winding from the air outlet after cooling.

[0044] Step 3: Cooling the top, the top heat dissipation mechanism guides the air to the heating coil through the ventilation ring;

[0045] Step 4: Balance the cooling, adjust the components to push the wind shield to tilt, and accelerate the circulation of cool air at the bottom.

[0046] Technical effects and advantages of the present invention:

[0047] 1. The present invention arranges a heat dissipation component in a closed fixing frame, so that the transformer can be forced to dissipate heat during operation. The heat dissipation component can extract the hot air inside the fixing frame and inject the cooled cold air into the fixing frame, so that the transformer in the fixing frame can be better in contact with the colder air, thereby improving the heat dissipation effect of the transformer.

[0048] 2. The present invention arranges a wind shield and an adjustment component in a fixed frame. The wind shield in a horizontal state can divide the closed fixed frame into a high-temperature zone and a low-temperature zone, so that the low-temperature air is in contact with the transformer coil for a longer time. The adjustment component can flip the wind shield. After the wind shield is flipped, the cold air on the lower side can flow quickly to the upper side, while reducing the temperature difference between the left and right sides of the winding, further improving the cooling effect, cooling the output end of the cross plate and the low-voltage coil, reducing the thermal expansion of the cross plate, and cooling the connection position of the cross plate to improve the temperature uniformity of the transformer.

[0049] 3. The present invention is provided with an upper positioning ring, a lower positioning ring and a middle positioning ring. During the assembly process of the winding, the upper positioning ring, the lower positioning ring and the middle positioning ring can fix the positions of the low-voltage coil and the high-voltage coil, and can keep the low-voltage coil and the high-voltage coil coaxial during the subsequent transformer transfer process, thereby reducing the displacement of the coil caused by vibration generated by transportation equipment, etc.

[0050] 4. The present invention is provided with an adjustment component and a top heat dissipation mechanism. When a single high-voltage coil generates high temperature, the gas inside the gas storage part expands, causing the corresponding reset push rod to squeeze the cooling tube on the outside of the adjacent high-voltage coil to flip. At this time, the amount of cold air on the upper part of the high-voltage coil that generates high temperature increases, thereby achieving the purpose of cooling the high-temperature coil separately when a single coil generates high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0052] Figure 2It is a schematic diagram of the internal structure of the fixing frame in the present invention.

[0053] Figure 3 It is a schematic diagram of the structure of the winding in the present invention.

[0054] Figure 4 This is a schematic diagram of the disassembly of the winding in the present invention.

[0055] Figure 5 It is a schematic diagram of the position of the adjustment component in the present invention.

[0056] Figure 6 It is a schematic diagram of the position of the flexible sealing ring in the present invention.

[0057] Figure 7 It is a schematic diagram of the airflow direction when the wind shield is in a horizontal state in the present invention.

[0058] Figure 8 It is a schematic diagram of the airflow direction when the wind shield is in a tilted state in the present invention.

[0059] Fig. 9 Schematic diagram of the position of the insulating plate in the present invention.

[0060] Fig.10 It is a cross-sectional view of the winding in the present invention.

[0061] Fig.11 It is a schematic diagram of the positional relationship between the adjustment component and the top heat dissipation mechanism in the present invention.

[0062] Fig.12 It is a schematic structural diagram of the top heat dissipation mechanism in the present invention.

[0063] Fig.13 It is a schematic diagram of the flipping structure of the cooling tube in the present invention.

[0064] In the figure: 1, winding; 2, iron core; 3, fixing frame; 4, panel; 5, heat dissipation assembly; 6, wind shield; 7, adjustment assembly; 8, top heat dissipation mechanism; 9, lower clamp; 10, lower step pad; 11, upper clamp; 12, upper step pad; 13, cross plate; 14, high-voltage terminal; 15, insulation plate; 16, fan; 101, high-voltage coil; 102, low-voltage coil; 103, insulation cylinder; 104, middle pad; 105, upper pad; 106, lower pad; 107, air guide tube; 108, upper positioning ring ; 109, lower positioning ring; 110, middle positioning ring; 111, flexible sealing ring; 112, ventilation ring; 113, air outlet; 501, air inlet; 502, air outlet; 701, flip pull rod; 702, drive motor; 703, wire reel; 704, connecting wire; 705, temperature sensor; 706, liquid guide groove; 801, positioning frame; 802, cooling pipe; 803, reed; 804, reset sleeve; 805, reset push rod; 806, ventilation pipe; 807, air storage unit; 808, reset rod. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0066] Embodiment 1, the present invention provides as follows Figures 1 to 12 A dry-type transformer shown includes an iron core 2, which is divided into two symmetrical left and right parts with a gap therebetween, so that the heat generated inside the iron core 2 can be quickly taken away during the heat dissipation process, and a winding 1 is sleeved on the outside of the iron core 2, and the winding 1 includes a high-voltage coil 101 and a low-voltage coil 102. The low-voltage coil 102 is sleeved on the outside of the iron core 2, and the high-voltage coil 101 and the low-voltage coil 102 are not in contact, and both are fixedly connected with wiring terminals.

[0067] The transformer also includes a fixing frame 3, a plurality of panels 4 are fixedly connected to the outside of the fixing frame 3, the panels 4 are connected to the fixing frame 3 by screws, a plurality of support rods are fixedly connected to the inside of the fixing frame 3 for supporting the support frame and its internal components so that the inside of the fixing frame 3 is closed, the winding 1 and the iron core 2 are both fixed inside the fixing frame 3, a long screw is fixedly connected inside the fixing frame 3, and the long screw passes through the fixing frame 3 and the corresponding panels 4 to ensure the stability of the transformer during transportation.

[0068] The heat dissipation component 5 is fixedly arranged on one side of the fixing frame 3. The heat dissipation component 5 includes an air inlet end 501 and an air outlet end 502. The air inlet end 501 and the air outlet end 502 are respectively provided with fans, which can extract the hot air inside the fixing frame 3 and inject the cooled cold air into the fixing frame 3. The heat dissipation component 5 also includes a part for cooling the air, which is a prior art and will not be described in detail here. The wind shield 6 is rotatably connected to the inner wall of the fixing frame 3, and its horizontal height is placed between the air inlet end 501 and the air outlet end 502. The rotational connection position of the wind shield 6 is placed on the side close to the heat dissipation component 5. The wind shield 6 is provided with a through hole at the position corresponding to the winding 1, which can prevent the winding 1 from interfering with the rotation of the wind shield 6. The wind shield 6 can divide the closed fixing frame 3 into a high-temperature zone and a low-temperature zone in a horizontal state. The high-temperature zone is placed on the upper side of the wind shield 6, and the heat rises into the high-temperature zone, and the hot air inside is drawn away by the air inlet end 501. The low-temperature zone is placed at the lower end of the closed plate, and the air outlet end 502 blows cold air into the low-temperature zone. The setting of the wind shield 6 can make the low-temperature air contact with the winding 1 for a longer time, further improving the heat dissipation effect. The adjustment component 7 is placed at the upper end of the windshield 6 and is used to adjust the angle of the windshield 6. The adjustment component 7 can rotate the windshield 6 so that a gap is formed between the side of the windshield 6 away from the rotation position and the inner wall of the fixing frame 3, so that the cold air on the lower side can flow quickly to the upper side to improve the cooling effect. The top heat dissipation mechanism 8 is placed between the multiple windings 1 and is used to ventilate and dissipate the heat of the upper end of the winding 1. When it is turned on, it can cool the heated coil.

[0069] Specifically, there are two low-voltage coils 102 in each high-voltage coil 101. The high-voltage coil 101 and the low-voltage coil 102 are coaxial, and an insulating tube 103 is provided between them, thereby forming a split transformer. There are gaps between the high-voltage coil 101 and the low-voltage coil 102 and the insulating tube 103 respectively, so that the heat generated during the operation of the transformer can be discharged more quickly, thereby improving the stability of the transformer operation.

[0070] More specifically, there are multiple windings 1, two windings 1 are coaxially arranged in the vertical direction, and the two coaxially arranged windings 1 are a group. The vertical arrangement design can better dissipate heat, and at the same time can also reduce the footprint of the transformer, can be used in a smaller space, and increase the scope of application of the equipment. Multiple middle pads 104 are arranged between the two windings 1 in the same group, and an upper pad 105 is arranged on the upper side of the winding 1 in the same group, and a lower pad 106 is arranged on the lower side. The upper pad 105, the lower pad 106 and the middle pad 104 are used to clamp the high-voltage coil 101 and the low-voltage coil 102, and position and fix them. The upper pad 105, the lower pad 106 and the middle pad 104 are evenly arranged in a circular shape. An air duct 107 is arranged between the two windings 1 in the same group, and the air duct 107 is fixedly connected to the middle pad 104. The air duct 107 is used to guide the lower cold air to flow upward to optimize the cooling effect. The two windings 1 in the same group are fixedly connected with a ventilation ring 112 on the outside. The ventilation ring 112 is a ring-shaped structure with an opening on the bottom. The ventilation ring 112 is provided with an air outlet 113 at a position corresponding to the top heat dissipation mechanism 8. The two windings 1 in the same group are fixedly connected with a flexible sealing ring 111 on the outside. One end of the flexible sealing ring 111 is fixedly connected to the outside of the ventilation ring 112 and the other end is fixedly connected to the wind shield 6. The flexible sealing ring 111 is placed at the position where the through hole is opened on the wind shield 6, so that the wind shield 6 can divide the inside of the fixed frame 3 into a high-temperature zone and a low-temperature zone, reduce the amount of air passing through the through hole, reduce the loss of cold air, and ensure that when the wind shield 6 is in a horizontal state, the cold air can better pass through the high-voltage coil 101 and the low-voltage coil 102, and take away the heat between them, thereby improving the cooling effect on the transformer.

[0071] Specifically, it also includes a lower clamp 9, which is placed at the lower end of multiple groups of coils. The lower side of the iron core 2 is placed between two lower clamps 9. The two lower clamps 9 are connected by bolts. A plurality of lower step pads 10 are fixedly connected between the two lower clamps 9. The lower step pads 10 are used to support the two lower clamps and fix the distance between the two lower clamps.

[0072] The upper clamp 11 is placed at the upper end of the multiple groups of coils, and the upper side of the iron core 2 is placed between the two upper clamps 11. The two upper clamps 11 are connected by bolts. A plurality of upper step pads 12 are fixedly connected between the two upper clamps 11. The upper step pads 12 are used to support the two upper clamps and fix the distance between the two upper clamps. A plurality of high-voltage terminals 14 are fixedly connected to one side of the upper clamp 11, which are electrically connected to the high-voltage coil 101, and the high-voltage terminal 14 is connected to the input high-voltage power supply. The multiple high-voltage coils 101 are electrically connected through wires, and a notch is also provided at the position of the windshield 6 corresponding to the wire to prevent the wire from interfering with it when the windshield 6 rotates. The upper step pad 12 and the lower step pad 10 are both in contact with the iron core 2 and are used to fix the position of the iron core 2. The upper step pad 12 and the lower step pad 10 are both made of insulating materials.

[0073] More specifically, the adjustment assembly 7 includes a flip pull rod 701, which is rotatably connected to the upper end of the windshield 6, and the position of the flip pull rod 701 corresponds to the top heat dissipation mechanism 8. A driving motor 702 is fixedly connected to the upper end of the fixing frame 3, and the output end is fixedly connected to a twisted wire drum 703, the outer side of the twisted wire drum 703 is fixedly connected to a connecting wire 704, and the other end of the connecting wire 704 is fixedly connected to the upper end of the flip pull rod 701. The driving motor 702 is electrically connected to a controller and a power source. The driving motor 702 rotates to wind the connecting wire 704 around the outer side of the twisted wire drum 703, and at the same time, the flip pull rod 701 pulls the windshield 6 upward to flip the windshield 6 to a certain angle. The temperature sensors 705 are respectively placed at the upper and lower ends of the windshield 6 to detect the temperature difference between the upper and lower sides of the windshield 6. The temperature sensors 705 are electrically connected to the controller. The temperature difference between the high temperature zone and the low temperature zone is determined by the values ​​detected by the temperature sensors 705 at the upper and lower sides of the windshield 6. When the temperature difference exceeds the preset value of the controller, the drive motor 702 is rotated. When the temperature difference between the upper and lower sides of the windshield 6 returns to the preset value, the controller turns the motor over, and then the windshield 6 is affected by gravity to restore the balance state. The liquid guide groove 706 is placed at the lower end of the windshield 6, and one side passes through the fixed frame 3. The liquid guide groove 706 is fixedly connected to the inner side of the fixed frame 3. When the windshield 6 is turned over, the condensed water on the lower side of the windshield 6 will flow into the liquid guide groove 706 along the windshield 6, and flow to the outside of the fixed frame 3 through the liquid guide groove 706, so as to prevent the condensed water from dripping and affecting the operation of the transformer.

[0074] It should be pointed out that since the heat dissipation component 5 is placed on one side of the fixing frame 3, its air outlet end 502 can only directly blow air to cool one side of the winding 1, and due to the obstruction of the winding 1, the side of the fixing frame 3 away from the heat dissipation component 5 is less exposed to cold wind. At this time, the temperature of the left and right sides of the winding 1 deviates, which affects the operation of the winding 1. After the wind shield 6 is flipped, a gap is generated between the wind shield 6 and the inner wall of the fixing frame 3, and the air in the low-temperature area will flow to the high-temperature area through the gap, so that the cold air can better penetrate the gap between the windings 1 and cool the outside of the winding 1. At the same time, the cold air can better enter the side of the fixing frame 3 away from the heat dissipation component 5, reducing the temperature difference between the left and right sides of the winding 1.

[0075] Specifically, a plurality of transverse plates 13 are fixedly connected inside the fixing frame 3, which penetrate the panel 4 on one side of the fixing frame 3. The transverse plates 13 are electrically connected to the low-voltage coil 102. The transverse plates 13 are conductive metal plates. The transverse plates 13 are insulated from the corresponding panels 4. The ends of the transverse plates 13 are connected to electrical appliances, and the ends of the transverse plates 13 are connected to the low-voltage coil 102 through bolts.

[0076] It should be noted that the cross plate 13 is placed on the side away from the heat dissipation component 5. When there is no gap between the wind shield 6 and the inner wall of the fixing frame 3, due to the uneven temperature distribution in the low-temperature zone, the cross plate 13 and the bolts fixing the cross plate 13 may easily expand thermally, resulting in a virtual connection between the cross plate 13 and the low-voltage coil 102, which may easily cause high temperature to be generated at the connection position, further resulting in a large temperature difference in the low-temperature zone, affecting the stable operation of the equipment; when a gap is generated between the wind shield 6 and the inner wall of the fixing frame 3, the cold air can flow better to the right side of the fixing frame 3, reducing the temperature difference in the low-temperature zone and preventing the cross plate 13 and the bolts fixing the cross plate 13 from thermal expansion.

[0077] More specifically, each winding 1 further includes an upper positioning ring 108, which is placed at the upper end of the upper low-voltage coil 102. The upper positioning ring 108 is fixedly connected to the upper pad 105, and is used to fix the upper end position of the upper low-voltage coil 102. A lower positioning ring 109 is placed at the lower end of the lower low-voltage coil 102. The lower positioning ring 109 is fixedly connected to the lower pad 106, and is used to fix the lower end position of the lower low-voltage coil 102. A middle positioning ring 110 is placed between the two low-voltage coils 102. The upper positioning ring 108, the lower positioning ring 109, and the middle positioning ring 110 are all made of insulating materials, and a plurality of ventilation holes are opened in the middle to better discharge the heat in the low-voltage coil 102. The upper positioning ring 108, the lower positioning ring 109 and the middle positioning ring 110 are all used to position the low-voltage coil 102 to ensure that the axial verticality of the low-voltage coil 102 remains unchanged, while preventing the low-voltage coil 102 from shifting and reducing the impact of vibration on the low-voltage coil 102 during transportation and use.

[0078] It should be noted that the upper positioning ring 108 and the lower positioning ring 109 are provided with notches at positions corresponding to the connection terminals of the low-voltage coil 102 .

[0079] An insulating plate 15 is fixed on the outer side of the iron core 2 and is placed between the iron core 2 and the upper clamp 11 and the lower clamp 9. The insulating plate 15 is placed on the inner side of the low-voltage coil 102 to prevent the iron core 2 from directly contacting the low-voltage coil 102, thereby preventing the iron core 2 from being grounded at multiple locations and affecting the operation of the transformer.

[0080] Specifically, a plurality of fans 16 are fixedly connected to the outer side of the lower clamp 9, and the air outlet of the fans 16 is directed toward the winding 1. During use, the fans 16 blow the cold air on the lower side into between the high-voltage coil 101, the low-voltage coil 102, and the iron core 2, and blow the hot air inside upward to dissipate the heat on the inner side of the winding 1, while dissipating the cold air on the lower side more evenly below the wind shield 6.

[0081] In this embodiment, during the transformer assembly process, the lower pad 106, the winding 1, the middle pad 104, the upper pad 105 and the upper clamp 11 are installed in sequence on the outside of the iron core 2; during the winding 1 assembly process, the high-voltage coil 101 is installed on the upper ends of the lower pad 106 and the middle pad 104, and is clamped in the corresponding notch to ensure that the high-voltage coils 101 in the same group are coaxial, and an air guide tube 107 is installed on the outside of the middle gasket, and then the upper positioning ring 108, the lower positioning ring 109 and the middle positioning ring 110 are used to limit the position of the low-voltage coil 102 relative to the high-voltage coil 101, and ensure the concentricity of multiple low-voltage coils 102, prevent the vibration generated during the transportation and use of the equipment from affecting the coil, and improve the stability of the device; a long screw is fixedly connected to the fixing frame 3, and the long screw passes through the fixing frame 3 to ensure the stability of the transformer during transportation.

[0082] Embodiment 2: Through the above embodiments, in actual work, each winding 1 is connected to different electrical appliances, resulting in temperature differences among multiple windings 1 during operation, which in turn makes it impossible for the high-temperature winding 1 to be cooled down individually, and thus makes the temperature distribution in the high-temperature area uneven. The high-temperature winding 1 cannot be cooled down in time, which is easy to cause burning. If the overall cooling speed is greatly increased due to the high temperature of one winding 1, the temperature of the remaining windings 1 will be too low, affecting the operation. Therefore, it is necessary to carry out targeted cooling for the problem of high temperature of a single winding 1, and for this purpose, the relevant components of the device are further improved.

[0083] Specifically, Figure 11-13The top heat dissipation mechanism 8 includes a positioning frame 801, which is arranged between two adjacent groups of high-voltage coils 101 and supported by the corresponding upper pad 105, so that the positioning frame 801 is fixed relative to the high-voltage coil 101. The cooling tube 802 is rotatably connected to the lower end of the positioning frame 801. The cooling tube 802 is in an arc shape as a whole, and a spring 803 is fixedly connected to the side close to the corresponding high-voltage coil 101. The other end of the spring 803 contacts the outer side of the corresponding high-voltage coil 101. The spring 803 pushes the cooling tube 802 to flip to the side away from the corresponding high-voltage coil 101. The lower end of the cooling tube 802 corresponds to the air outlet 113. At this time, the air in the low-temperature zone enters the high-temperature zone through the air outlet 113, and flows to the upper end of the corresponding high-voltage coil 101 under the influence of the cooling tube 802, and cools the upper part of the high-voltage coil 101. The reset sleeve 804 is fixedly connected to the lower end of the positioning frame 801. The reset push rod 805 is slidably connected to the inside of the corresponding reset sleeve 804 and can push the corresponding cooling tube 802 to flip. The reset push rod 805 can slide out from the side of the reset sleeve 804 close to the cooling tube 802 to push the cooling tube 802 to flip so that the bottom of the cooling tube 802 corresponds to the air outlet 113. At this time, the low-temperature gas in the ventilation ring 112 flows through the cooling tube 802 to the upper end of the adjacent high-voltage coil 101 to cool the upper end of the adjacent high-voltage coil 101. The ventilation pipe 806 is fixedly connected to one end of the reset sleeve 804. The air storage part 807 is connected with the ventilation pipe 806 and is fixedly connected to the outer side of the corresponding high-voltage coil 101. The air storage part 807 is provided with hot expansion gas. When the high-voltage coil 101 fixedly connected to the air storage part 807 generates high temperature, the gas inside the air storage part 807 expands, and the expanded gas enters the reset sleeve 804 through the ventilation pipe 806, so that the corresponding reset push rod 805 squeezes the cooling tube 802 on the outer side of the adjacent high-voltage coil 101. The bottom of the cooling tube 802 after flipping is connected with the corresponding air outlet 113. At this time, the amount of cold air on the upper part of the high-voltage coil 101 that generates high temperature increases, so that the high-voltage coil 101 that generates high temperature is quickly cooled down. The reset rods 808 are respectively fixedly connected to the outside of the cooling tube 802 and are placed on the side of the cooling tube 802 away from the corresponding high-voltage coil 101. Each reset rod 808 is slidably connected to the corresponding flip pull rod 701. The middle part of the flip pull rod 701 is fixedly connected with a cross bar, so that the whole is in a "T" shape. The cross bar contacts the end of the reset rod 808. When the flip pull rod 701 slides upward, the reset rod 808 is affected by the middle part of the flip pull rod 701, causing the cooling tube 802 to flip upward, forcing the lower end of the cooling tube 802 to separate from the corresponding air outlet 113, so that the cold air in the lower low-temperature zone can flow to the upper part faster.

[0084] Embodiment 3, the present invention also provides a transformer working method, comprising the following steps:

[0085] Step 1: Power on and connect the power supply and the power-consuming equipment to the high-voltage terminal 14 and the horizontal plate 13 respectively;

[0086] Step 2: Cool down. Start the heat dissipation component 5. The air inlet 501 draws in the hot air from the upper side, and blows it into the lower side of the winding 1 from the air outlet 502 after cooling.

[0087] Step 3: Cooling down the top, the top heat dissipation mechanism 8 guides the air to the heating coil through the ventilation ring 112;

[0088] Step 4: Balanced cooling: Adjust component 7 to push wind shield 6 to tilt and accelerate the circulation of cool air at the bottom.

[0089] In this embodiment, during use, the input high-voltage power supply and the output electrical power supply are respectively connected to the high-voltage terminal 14 and the cross plate 13 to make the transformer work; during the operation of the transformer, high temperature will be generated, and the hot air will rise, causing the upper end temperature of the winding 1 to be greater than the lower end temperature, and the temperature difference between the upper and lower sides of the wind shield 6 is P1. At this time, in order to ensure the normal operation of the transformer, the transformer needs to be cooled. The hotter air is drawn into the heat dissipation component 5 through the air inlet end 501, and the cooled air is discharged through the air outlet end 502. The cold air is placed on the lower side of the winding 1, and the low-temperature air is blown into the gap between the high-voltage coil 101 and the low-voltage coil 102 through the bottom fan 16, and the heat in the middle is taken away to complete the cooling of the transformer. In this process, part of the cold air passes through the gap between the wind shield 6 and the coil upward, so that the temperature on the upper side of the wind shield 6 is reduced, thereby improving the temperature control of the transformer and making it run more stably.

[0090] When a single winding 1 generates high temperature, the gas inside the corresponding gas storage part 807 expands, causing the corresponding reset push rod 805 to squeeze the cooling tube 802 on the outside of the adjacent high-voltage coil 101 to flip. At this time, the amount of cold air on the upper part of the high-voltage coil 101 that generates high temperature increases, causing the high-voltage coil 101 that generates high temperature to cool down quickly.

[0091] Since the temperature difference between the upper and lower parts of the wind shield 6 is large, condensation water is easily generated at the bottom of the wind shield 6, and when the transformer operates efficiently or the ambient temperature is high, the temperature of the upper winding 1 rises, so that the temperature difference between the upper and lower parts of the wind shield 6 is P2, and P2 is greater than P1. At this time, the driving motor 702 rotates to wind the connecting wire 704 around the outer side of the stranded wire drum 703, and at the same time, the flip pull rod 701 pulls the wind shield 6 upward, so that the wind shield 6 flips a certain angle, and a gap is generated between the wind shield 6 and the inner wall of the fixing frame 3, so that the lower cold air can flow upward faster, and the cooling speed of the upper hotter part is accelerated; at the same time, the wind shield 6 After tilting, the condensed water on the lower side flows along the wind shield 6 and drips into the liquid guide groove 706, and then is discharged out of the fixing frame 3 along the liquid guide groove 706, so that the transformer can work stably, and due to the gap between the wind shield 6 and the inner side of the fixing frame 3, the cold air blown out by the heat dissipation component 5 can move better to the right, so that the temperature on the right side of the fixing frame 3 is further reduced. When the flip pull rod 701 slides upward, the lower end of the forced cooling pipe 802 is separated from the corresponding air outlet 113, so that the cold air in the lower low-temperature zone can flow to the upper part faster, reducing the temperature difference between the left and right sides of the winding 1, and avoiding the problem of uneven cooling of the winding 1.

[0092] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dry-type transformer, comprising an iron core (2), with a winding (1) being sleeved on the outer side of the iron core (2), characterized in that: Also includes: A heat dissipation component (5), the heat dissipation component (5) comprising an air inlet end (501) and an air outlet end (502); A windshield (6) rotatably connected to the inner wall of the fixing frame (3) and horizontally placed between the air inlet end (501) and the air outlet end (502); An adjustment component (7) is disposed at the upper end of the windshield (6), the adjustment component (7) comprising a flip pull rod (701) which is rotatably connected to the upper end of the windshield (6), the flip pull rod (701) being capable of driving the windshield (6) to flip so as to adjust the angle of the windshield (6); Temperature sensors (705) are respectively disposed at the upper and lower ends of the wind shield (6) and are used to detect the temperature difference between the upper and lower sides of the wind shield (6); A liquid guide groove (706) is disposed at the lower end of the wind shield (6) and has one side passing through the fixing frame (3); A top heat dissipation mechanism (8) disposed between the plurality of windings (1) and used for ventilating and dissipating the heat at the upper ends of the windings (1), the top heat dissipation mechanism (8) comprising a positioning frame (801) disposed between two adjacent groups of windings (1); A cooling tube (802) is rotatably connected to the lower end of the positioning frame (801), and is fixedly connected to a reed (803) on one side close to the corresponding winding (1), and the other end of the reed (803) is in contact with the outer side of the corresponding winding (1); Each of the windings (1) comprises a high-voltage coil (101) and a low-voltage coil (102); There are two low-voltage coils (102) inside the high-voltage coil (101), the high-voltage coil (101) and the low-voltage coil (102) are coaxial, and an insulating cylinder (103) is provided between them; There are multiple windings (1), two coaxially arranged windings (1) form a group, multiple middle pads (104) are provided between the two windings (1) in the same group, and upper pads (105) are provided on the upper side of the windings (1) in the same group, and lower pads (106) are provided on the lower side; An air guide tube (107) is provided between two windings (1) of the same group, and the air guide tube (107) is fixedly connected to the middle cushion block (104); The two windings (1) in the same group are fixedly connected to the outside with a ventilation ring (112), the ventilation ring (112) is provided with an air outlet (113) at a position corresponding to the top heat dissipation mechanism (8), and the lower end of the cooling tube (802) corresponds to the air outlet (113); A flexible sealing ring (111) is fixedly connected to the lower end of the ventilation ring (112), one end of which is fixedly connected to the outside of the ventilation ring (112) and the other end of which is fixedly connected to the wind shield (6).

2. A dry-type transformer according to claim 1, characterized in that: It also comprises a fixing frame (3), wherein a plurality of panels (4) are fixedly connected to the outside of the fixing frame (3) so that the inside of the fixing frame (3) is closed, and the winding (1) and the iron core (2) are both fixed inside the fixing frame (3); A lower clamp (9) is placed at the lower end of the plurality of coils, the lower side of the iron core (2) is placed between two lower clamps (9), and a plurality of lower step pads (10) are fixedly connected between the two lower clamps (9); An upper clamp (11) is placed at the upper end of the plurality of coil groups, the upper side of the iron core (2) is placed between two of the upper clamps (11), and a plurality of upper step pads (12) are fixedly connected between the two upper clamps (11); A high-voltage terminal (14) fixedly connected to one side of the upper clamp (11), and provided in plurality, each high-voltage terminal (14) being electrically connected to the high-voltage coil (101); The plurality of high-voltage coils (101) are electrically connected via wires; The upper step pad (12) and the lower step pad (10) are both in contact with the iron core (2) and are used to fix the position of the iron core (2).

3. A dry-type transformer according to claim 1, characterized in that: The adjustment assembly (7) further comprises a driving motor (702) which is fixedly connected to the upper end of the fixing frame (3), and the output end of which is fixedly connected to a twisted wire drum (703), the outer side of the twisted wire drum (703) is fixedly connected to a connecting wire (704), and the other end of the connecting wire (704) is fixedly connected to the upper end of the flip pull rod (701).

4. A dry-type transformer according to claim 2, characterized in that: A plurality of transverse plates (13) are fixedly connected inside the fixing frame (3) and penetrate the panel (4) on one side of the fixing frame (3). The transverse plates (13) are electrically connected to the low-voltage coil (102).

5. A dry-type transformer according to claim 3, characterized in that: The top heat dissipation mechanism (8) further comprises a reset sleeve (804) which is fixedly connected to the lower end of the positioning frame (801); A reset push rod (805) is slidably connected to the inside of the corresponding reset sleeve (804) and is capable of pushing the corresponding cooling tube (802) to flip; A vent tube (806) fixedly connected to one end of the reduction sleeve (804); An air storage portion (807) which is in communication with the ventilation pipe (806) and is respectively fixedly connected to the outside of the corresponding high-voltage coil (101); The reset rods (808) are respectively fixedly connected to the outside of the cooling tube (802) and are placed on a side of the cooling tube (802) away from the corresponding high-voltage coil (101). Each of the reset rods (808) is slidably connected to the corresponding flip pull rod (701).

6. A dry-type transformer according to claim 1, characterized in that: Each of the windings (1) further comprises an upper positioning ring (108) which is placed at the upper end of the upper low-voltage coil (102); A lower positioning ring (109) is placed at the lower end of the lower low-voltage coil (102); A middle positioning ring (110) disposed between the two low-voltage coils (102); The upper positioning ring (108), the lower positioning ring (109), and the middle positioning ring (110) are all used to position the low-voltage coil (102).

7. A dry-type transformer according to claim 1, characterized in that: The outer side of the iron core (2) is provided with an insulating plate (15) in the form of a fixed sleeve, which is placed between the iron core (2) and the upper clamp (11) and the lower clamp (9).

8. A dry-type transformer according to claim 2, characterized in that: A plurality of fans (16) are fixedly connected to the outer side of the lower clamp (9), and the air outlet of the fans (16) is directed toward the winding (1).

9. A transformer operating method, applicable to a dry-type transformer according to claim 4, characterized in that: The following steps are involved: Step 1: Power on and connect the power source and the power-consuming equipment to the high-voltage terminal (14) and the horizontal plate (13) respectively; Step 2: Cooling down. The heat dissipation component (5) is started, and the hot air from the upper side is drawn in through the air inlet end (501), and after cooling down, it is blown into the lower side of the winding (1) from the air outlet end (502); Step 3: cooling the top, the top heat dissipation mechanism (8) guides air to the heating coil through the ventilation ring (112); Step 4: Balanced cooling: Adjust the assembly (7) to push the wind shield (6) to tilt, thereby accelerating the circulation of cool air at the bottom.

Images