A high voltage coil airway placement structure

Abstract

The present application belongs to the technical field of epoxy cast dry-type power transformers, and in particular, is a high-voltage coil airway placement structure, including a high-voltage coil and an airway, wherein the front surface of the high-voltage coil is provided with a through airway, an airway square tube is installed in the airway, the airway square tube and the high-voltage coil are fixedly connected, and an I-beam strut is installed on one side of the airway close to the airway square tube; after the wire is wound around the inside of the airway, internal insulation is placed, and then an airway square tube is placed in the airway, and then an I-beam strut is placed, because the thickness of the I-beam strut is matched with that of the airway, the I-beam strut can be firmly fixed in the airway, further stabilizing the connection between the I-beam strut and the high-voltage coil and facilitating the plugging and unplugging of the airway square tube, and continuing to wind in the third and fourth sections, an airway square tube is provided between every two I-beam struts to avoid cutting and welding of the wire, which not only reduces the coil winding time but also improves product quality.

Description

Technical Field

[0001] The present application belongs to the technical field of epoxy cast dry-type power transformers, and specifically relates to a high-voltage coil airway placement structure. Background Art

[0002] Epoxy dry-type power transformers use epoxy resin combined with off-duty fiber as transformer insulation materials, which has the characteristics of being difficult to burn and easy to extinguish. It will not produce arcs due to short circuits, and is flame-proof and explosion-proof. With the development of urban and rural power grid construction, dry-type transformers have the advantages of being oil-free, fire-proof, maintenance-free, safe and reliable. The products are used in high-rise buildings, commercial centers, hospitals, airports, stations, subways, ships, chemicals, tunnels, mines and residential areas, where fire prevention is strictly required. They can also be used as replacement products for oil-immersed transformers and are used in places that require oil-free, maintenance-free or anti-theft. Dry-type transformers are divided into epoxy-cast and non-encapsulated products. Epoxy-cast dry-type transformers place an airway in the middle of some coils with slightly larger capacity according to the requirements of capacity and temperature rise. The traditional way of placing the airway is to first bypass all the turns inside the airway, and then bypass the turns outside the airway after placing the airway.

[0003] Before placing the wires in the airway of the original high-voltage coil, the user needs to cut the wires, put them into the airway, and then weld the wires together, repeating the steps in sequence. A 10KV high-voltage coil is generally divided into 4 sections, so it needs to be spliced ​​4 times. If the voltage level is higher, more wires need to be spliced, which not only increases the coil winding time, but also causes quality risks such as local overheating of the transformer and increased partial discharge during welding, reducing the quality of the product. Summary of the invention

[0004] To solve the problems raised in the above background technology, the present application provides a high-voltage coil airway placement structure, which has the characteristics of reducing coil winding time, avoiding safety hazards, and improving product quality.

[0005] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a high-voltage coil airway placement structure, comprising a high-voltage coil and an airway, the front surface of the high-voltage coil is provided with a through airway, an airway square tube is installed in the airway, the airway square tube and the high-voltage coil are fixedly connected, an I-shaped support bar is installed on the side of the airway close to the airway square tube, the I-shaped support bar and the high-voltage coil are fixedly connected, a first rotating shaft is provided on the inner side wall of the airway square tube, the first rotating shaft and the airway square tube are fixedly connected, a first fixing plate is provided at the front end of the first rotating shaft, the first fixing plate and the first rotating shaft are rotatably connected, a female buckle is provided on the inner side wall of the first fixing plate away from the first rotating shaft, the female buckle and the first fixing plate are fixedly connected, a second rotating shaft is installed on the side of the inner side wall of the airway square tube away from the first rotating shaft, a second fixing plate is provided at the front end of the second rotating shaft, the second fixing plate and the second rotating shaft are rotatably connected, a sub-buckle is installed on the side of the second fixing plate close to the first fixing plate, a support plate is provided on the rear surface of the second fixing plate, and the support plate and the second fixing plate are fixedly connected.

[0006] In order to make the arc-shaped airway enclose the high-voltage coil for the purpose of placing and winding the wire, the I-shaped I-beam strut has good pressure-bearing capacity and plays a certain supporting role. It not only makes great use of the available space in the airway, but also reduces the material for the later epoxy pouring, thereby achieving the purpose of saving materials. As a preferred technical solution for the high-voltage coil airway placement structure of the present application, the airway is arc-shaped, the cross-section of the I-beam strut is I-shaped, and the I-beam strut is adapted to the thickness of the airway.

[0007] The airway square tube plays a supporting and isolating role, so as to facilitate the insertion and removal of the airway square tube. As a preferred technical solution for the high-voltage coil airway placement structure of the present application, the airway square tube is a hollow cylinder, and the thickness of the I-beam support is greater than the thickness of the airway square tube.

[0008] In order to avoid repeated cutting and welding of wires, avoid safety hazards caused by the welding process, improve product quality, and also reduce the coil winding time, as a preferred technical solution for the high-voltage coil airway placement structure of the present application, the number of the airway square tubes and the I-beams are both several, and one of the airway square tubes is provided between every two I-beams.

[0009] In order to increase the friction between the support plate and the high-voltage coil through the connecting plate, which is beneficial to the stability of the airway square tube between the airways, as a preferred technical solution for the high-voltage coil airway placement structure of the present application, a connecting plate is provided on the rear surface of one end of the support plate away from the second fixed plate, and the connecting plate and the support plate are bonded and fixed.

[0010] It is convenient for the user to hold the first fixing plate and the second fixing plate to pull out the trachea square tube, and it is convenient for the user to apply force to pull it out. As a preferred technical solution for the high-voltage coil airway placement structure of the present application, the first fixing plate and the second fixing plate are rectangular prisms, and the first fixing plate and the second fixing plate are fixedly connected by a mother buckle and a child buckle.

[0011] In order to use the disc structure to ensure a stable connection between the first fixed plate and the second fixed plate and the high-voltage coil, as a preferred technical solution for the high-voltage coil airway placement structure of the present application, the support plate and the connecting plate are combined into a disc structure, and the distance from the second fixed plate to the high-voltage coil is equal to the height of the disc structure.

[0012] In order to ensure a stable connection between the first fixing plate and the high-voltage coil, as a preferred technical solution for the high-voltage coil airway placement structure of the present application, a disc structure is fixedly provided on the rear surface of one end of the first fixing plate close to the female buckle.

[0013] Compared with the prior art, the beneficial effects of this application are:

[0014] The present application installs an airway square tube and an I-beam in the airway. When winding the wire, the normal winding method is followed, starting from the first section and winding from the second section. The user first winds the wire into the inside of the airway, places internal insulation, and then puts an airway square tube into the airway, followed by an I-beam. Because the thickness of the I-beam is matched with that of the airway, the I-beam can be firmly fixed in the airway, further stabilizing the connection between the I-beam and the high-voltage coil and facilitating the insertion and removal of the airway square tube. Winding continues in the third and fourth sections, and an airway square tube is provided between every two I-beams, that is, the airway square tube and the I-beam are placed at intervals, thereby avoiding the cutting and welding of the wire. By not cutting the wire, not only the coil winding time is reduced, but also the quality risks such as local overheating of the transformer and increased partial discharge due to welding problems are prevented, thereby improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the structure of this application;

[0017] Figure 2 This is the installation diagram of the airway square tube and high-voltage coil in this application;

[0018] Figure 3 This is a schematic diagram of the coil winding in this application;

[0019] Figure 4 This is a schematic diagram of the enlarged structure of point A in this application;

[0020] Figure 5 This is the installation diagram of the support plate and the second fixing plate in this application;

[0021] In the figure: 1. high-voltage coil; 2. air duct; 3. air duct square tube; 4. I-beam support; 5. first rotating shaft; 6. first fixed plate; 7. female buckle; 8. second rotating shaft; 9. second fixed plate; 10. female buckle; 11. support plate; 12. connecting plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] Example

[0024] See also Figure 1-5 The present application provides a technical solution: a high-voltage coil airway placement structure, including a high-voltage coil 1 and an airway 2, a through airway 2 is opened on the front surface of the high-voltage coil 1, an airway square tube 3 is installed in the airway 2, the airway square tube 3 and the high-voltage coil 1 are fixedly connected, an I-shaped support bar 4 is installed on the side of the airway 2 close to the airway square tube 3, the I-shaped support bar 4 and the high-voltage coil 1 are fixedly connected, a first rotating shaft 5 is provided on the inner side wall of the airway square tube 3, the first rotating shaft 5 and the airway square tube 3 are fixedly connected, a first fixing plate 6 is provided at the front end of the first rotating shaft 5, and the first The fixing plate 6 is rotatably connected to the first rotating shaft 5, and a female buckle 7 is provided on the inner wall of the end of the first fixing plate 6 away from the first rotating shaft 5, and the female buckle 7 and the first fixing plate 6 are fixedly connected. A second rotating shaft 8 is installed on the side of the inner wall of the airway square tube 3 away from the first rotating shaft 5, and a second fixing plate 9 is provided at the front end of the second rotating shaft 8. The second fixing plate 9 is rotatably connected to the second rotating shaft 8, and a sub-buckle 10 is installed on the side of the second fixing plate 9 close to the first fixing plate 6, and a support plate 11 is provided on the rear surface of the second fixing plate 9, and the support plate 11 and the second fixing plate 9 are fixedly connected.

[0025] In this embodiment, the airway square tube 3 and the I-shaped support bar 4 are both made of insulating material, which is beneficial to improving the insulation performance of the high-voltage coil 1, thereby achieving high reliability during operation.

[0026] In this embodiment, since the connecting plate 12 is made of silicone material, which has good wear resistance and elasticity, the friction between the support plate 11 and the high-voltage coil 1 is increased by the connecting plate 12, which is beneficial to the stability of the airway square tube 3 between the airway 2.

[0027] In the present embodiment, when winding the conductor, the normal winding method is followed, starting from the first section and winding from the second section. The user first winds the conductor around the inside of the airway 2 of the high-voltage coil 1, places internal insulation, and then places an airway square tube 3 in the airway 2, followed by an I-shaped support bar 4. Because the thickness of the I-shaped support bar 4 is adapted to that of the airway 2, the I-shaped support bar 4 can be firmly fixed in the airway 2, further stabilizing the connection between the I-shaped support bar 4 and the high-voltage coil 1 and facilitating the plugging and unplugging of the airway square tube 3. It has good pressure-bearing capacity, plays a certain supporting role, and increases the filling factor of the conductor, which is convenient for the subsequent epoxy casting material. In order to facilitate the fixing of the I-shaped support bar 4 in the airway 2, the winding is continued in the third and fourth sections, and an airway square tube 3 is provided between every two I-shaped support bars 4, that is, the airway square tube 3 and the I-shaped support bar 4 are spaced apart. Placement avoids cutting and welding of wires. By not cutting the wires, not only the coil winding time is reduced, but also the quality risks such as local overheating of the transformer and increased local discharge caused by welding problems are prevented, thereby improving product quality. When inserting the airway square tube 3, the first fixing plate 6 and the second fixing plate 9 can be rotated to both sides of the high-voltage coil 1 under the action of the first rotating shaft 5 and the second rotating shaft 8. Because the distance from the second fixing plate 9 to the high-voltage coil 1 is equal to the height of the disc structure, the connecting plate 12 is cooperated to increase the friction between the support plate 11 and the high-voltage coil 1, which is beneficial to the stability of the airway square tube 3 between the airway 2. When the airway square tube 3 is pulled out, the first fixing plate 6 and the second fixing plate 9 can be directly rotated until the sub-buckle 10 and the mother buckle 7 are fixed. The user can hold the first fixing plate 6 and the second fixing plate 9 to pull out the airway square tube 3, which is convenient for the user to apply force to pull it out.

[0028] Specifically, the airway 2 is arc-shaped, the cross section of the I-shaped support bar 4 is I-shaped, and the thickness of the I-shaped support bar 4 is adapted to that of the airway 2 .

[0029] In this embodiment, the arc-shaped airway 2 is used to enclose the high-voltage coil 1 for the purpose of placing the wire, and in order to facilitate the fixing of the I-beam strut 4 in the airway 2, the I-beam strut 4 is adapted to the thickness of the airway 2, and the I-shaped I-beam strut 4 has good pressure-bearing capacity, plays a certain supporting role, and increases the filling factor of the wire, which is convenient for reducing the subsequent epoxy casting material and achieves the effect of saving epoxy material.

[0030] Specifically, the airway square tube 3 is a hollow cylinder, and the thickness of the I-shaped support bar 4 is greater than the thickness of the airway square tube 3 .

[0031] In this embodiment, the hollow cylindrical airway square tube 3 plays the role of supporting the isolated wire. Because the thickness of the I-shaped support bar 4 is greater than the thickness of the airway square tube 3, in order to achieve the purpose of facilitating the user to pull out the airway square tube 3 after the coil is wound, the labor intensity of the user is reduced.

[0032] Specifically, the number of the airway square tubes 3 and the number of the I-shaped struts 4 are both several, and one airway square tube 3 is provided between every two I-shaped struts 4 .

[0033] In the present embodiment, in order to facilitate the winding of the wires, a plurality of airway square tubes 3 and a plurality of I-shaped struts 4 are provided, so that there is no need to repeatedly cut and weld the wires. An airway square tube 3 is added between two I-shaped struts 4, thereby avoiding the cutting and welding of the wires, preventing quality risks caused by welding problems, improving product quality, and also reducing the coil winding time.

[0034] Specifically, a connecting plate 12 is provided on the rear surface of one end of the supporting plate 11 away from the second fixing plate 9 , and the connecting plate 12 and the supporting plate 11 are bonded and fixed.

[0035] In this embodiment, since the connecting plate 12 is made of silicone material, which has good wear resistance and elasticity, the friction between the support plate 11 and the high-voltage coil 1 is increased by the connecting plate 12, which is beneficial to the stability of the airway square tube 3 between the airway 2.

[0036] Specifically, the first fixing plate 6 and the second fixing plate 9 are rectangular parallelepipeds, and the first fixing plate 6 and the second fixing plate 9 are fixedly connected by the female buckle 7 and the male buckle 10 .

[0037] In this embodiment, when pulling out the airway square tube 3, the user can rotate the first fixing plate 6 and the second fixing plate 9 until the sub-buckle 10 is connected to the mother buckle 7. The user can hold the first fixing plate 6 and the second fixing plate 9 to pull out the airway square tube 3, which is convenient for the user to apply force to pull it out.

[0038] Specifically, the support plate 11 and the connecting plate 12 are combined into a disc structure, and the distance from the second fixing plate 9 to the high-voltage coil 1 is equal to the height of the disc structure.

[0039] In this embodiment, the disc structure is used to ensure a stable connection between the first fixing plate 6 and the second fixing plate 9 and the high-voltage coil 1 and to fix the positions of the first fixing plate 6 and the second fixing plate 9 without affecting the winding.

[0040] Specifically, a disc structure is fixedly provided on the rear surface of one end of the first fixing plate 6 close to the female buckle 7 .

[0041] In this embodiment, the connection between the first fixing plate 6 and the high-voltage coil 1 is stabilized, which helps the airway square tube 3 not to shake easily.

[0042] The working principle and use process of the present application: when winding the wire, according to the normal winding method, starting from the first section and winding from the second section, the user first winds the wire into the airway 2 of the high-voltage coil 1, places the internal insulation, and then puts an airway square tube 3 into the airway 2, followed by an I-beam strut 4. Because the thickness of the I-beam strut 4 is adapted to the airway 2, the I-beam strut 4 can be firmly fixed in the airway 2, further making the connection between the I-beam strut 4 and the high-voltage coil 1 stable and convenient for the plugging and unplugging of the airway square tube 3. Continue to wind in the third and fourth sections, and adopt a method of providing an airway square tube 3 between every two I-beam struts 4, that is, the airway square tube 3 and the I-beam strut 4 are placed at intervals, thereby avoiding the cutting and welding of the wire. By not cutting the wire, not only the coil winding time is reduced, but also the quality risks such as local overheating of the transformer and increased local discharge caused by welding problems are prevented, thereby improving the product quality. The airway square tube 3 needs to be kept in place before the winding is completed. It is located in the high-voltage coil 1 to ensure that the high-voltage coil 1 is cast and solidified. After the wire winding is completed, continue to wind the wire of the outer layer of the airway until the specified number of turns. After the completion, pull out the airway square tube 3. Because the thickness of the I-beam support 4 is greater than the thickness of the airway square tube 3, it is convenient for users to pull out the airway square tube 3, reducing the labor intensity of users. When inserting the airway square tube 3, the first fixing plate 6 and the second fixing plate 9 can be rotated to the two sides of the high-voltage coil 1 under the action of the first rotating shaft 5 and the second rotating shaft 8. Because the distance from the second fixing plate 9 to the high-voltage coil 1 is equal to the height of the disc structure, the connecting plate 12 is cooperated to increase the friction between the support plate 11 and the high-voltage coil 1, which is beneficial to the stability of the airway square tube 3 between the airway 2. When pulling out the airway square tube 3, the first fixing plate 6 and the second fixing plate 9 can be directly rotated until the sub-buckle 10 and the mother buckle 7 are fixed. The user can hold the first fixing plate 6 and the second fixing plate 9 to pull out the airway square tube 3, which is convenient for the user to apply force to pull it out.

[0043] Finally, it should be noted that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A high-voltage coil airway placement structure, comprising a high-voltage coil (1) and an airway (2), wherein the front surface of the high-voltage coil (1) is provided with a through airway (2), characterized in that: An airway square tube (3) is installed in the airway (2), and the airway square tube (3) is fixedly connected to the high-voltage coil (1). An I-shaped brace (4) is installed on the side of the airway (2) close to the airway square tube (3), and the I-shaped brace (4) is fixedly connected to the high-voltage coil (1). A first rotating shaft (5) is provided on the inner side wall of the airway square tube (3), and the first rotating shaft (5) is fixedly connected to the airway square tube (3). A first fixing plate (6) is provided at the front end of the first rotating shaft (5), and the first fixing plate (6) is rotatably connected to the first rotating shaft (5). A female buckle (7) is provided on the inner side wall of the end of the first fixing plate (6) away from the first rotating shaft (5), and the female buckle (7) is fixedly connected to the first fixing plate (6). A second rotating shaft (8) is installed on the inner side wall of the airway square tube (3) away from the first rotating shaft (5), and the front end of the second rotating shaft (8) is provided with a female buckle (7). A second fixing plate (9), wherein the second fixing plate (9) and the second rotating shaft (8) are rotatably connected, a sub-buckle (10) is installed on a side of the second fixing plate (9) close to the first fixing plate (6), a support plate (11) is provided on the rear surface of the second fixing plate (9), and the support plate (11) and the second fixing plate (9) are fixedly connected, the number of the airway square tubes (3) and the number of the I-shaped support bars (4) are both multiple, and one airway square tube (3) is provided between every two I-shaped support bars (4), the first fixing plate (6) and the second fixing plate (9) are rectangular parallelepipeds, the first fixing plate (6) and the second fixing plate (9) are fixedly connected by the female buckle (7) and the sub-buckle (10), the support plate (11) and the connecting plate (12) are combined into a disc structure, and the distance from the second fixing plate (9) to the high-voltage coil (1) is equal to the height of the disc structure.

2. A high-voltage coil airway placement structure according to claim 1, characterized in that: The air channel (2) is arc-shaped, the cross section of the I-shaped support bar (4) is I-shaped, and the thickness of the I-shaped support bar (4) is adapted to that of the air channel (2).

3. A high-voltage coil airway placement structure according to claim 1, characterized in that: The airway square tube (3) is a hollow cylinder, and the thickness of the I-shaped support bar (4) is greater than the thickness of the airway square tube (3).

4. The high-voltage coil airway placement structure according to claim 1, characterized in that: A connecting plate (12) is provided on the rear surface of one end of the supporting plate (11) away from the second fixing plate (9), and the connecting plate (12) and the supporting plate (11) are bonded and fixed.

5. The high-voltage coil airway placement structure according to claim 1, characterized in that: A disc structure is fixedly provided on the rear surface of one end of the first fixing plate (6) close to the female buckle (7).

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