A low voltage coil end insulation structure

Abstract

The present application relates to a low-voltage coil end insulation structure, including a main body, a connecting plate and a bottom insulation block, the outer side of the main body is fixed with copper foil and an interlayer insulator, and the outer side of the copper foil and the interlayer insulator is provided with a sleeve frame, the copper foil and the interlayer insulator are movably connected to the sleeve frame, the connecting plate is installed on the left side of the sleeve frame, and the outer side of the connecting plate is connected with a mounting plate, the connecting plate and the sleeve frame are fixedly connected, and the connecting plate and the mounting plate are fixedly connected, an isolation grid is provided on the outer side of the sleeve frame, and the isolation grid and the sleeve frame are movably connected, the bottom insulation block is fixed below the main body, and the top insulation block is installed above the main body. The beneficial effect of the present application is that the low-voltage coil end insulation structure is provided with a sleeve frame and a rubber filling layer, which can protect the main body and prevent the device from being damaged by external factors when in use, thereby improving the safety of the device.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage coils, and in particular to an insulation structure for a low-voltage coil end. Background Art

[0002] With the development of urban and rural power grid construction, dry-type transformers are increasingly being used in high-rise buildings, commercial centers, petrochemicals and other places because of their advantages such as oil-free, fireproof, maintenance-free, safe and reliable. The epoxy cast dry-type transformer structure consists of high and low voltage windings, core assembly, insulation, leads, etc. The high-voltage coil is an epoxy resin vacuum casting structure. The low-voltage winding often adopts a foil winding structure due to its low voltage and high current, and the end is sealed with epoxy resin and curing agent.

[0003] The existing low-voltage coil is wound in parallel with a layer of copper foil and a piece of insulating paper. In order to prevent the gap between turns from causing resin flow during end sealing, it is necessary to apply sealant, scrape putty, and add insulating plates inside and outside before pouring, which increases the workload, cannot guarantee the quality, and has an unsightly appearance. Summary of the invention

[0004] The purpose of the present application is to provide an insulation structure for the end of a low-voltage coil to solve the problem in the above-mentioned background technology that the low-voltage coil is wound in parallel with a layer of copper foil and a piece of insulating paper. In order to prevent the gap between the turns from causing the resin to flow during the end sealing, it is necessary to apply sealant, scrape putty, and add insulating plates inside and outside before pouring, which increases the workload, cannot guarantee the quality, and has an unsightly appearance.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a low-voltage coil end insulation structure, comprising a main body, a connecting plate and a bottom insulating block, the outer side of the main body is fixed with copper foil and an interlayer insulator, and the outer side of the copper foil and the interlayer insulator is arranged with a sleeve frame, the copper foil and the interlayer insulator are movably connected to the sleeve frame, the connecting plate is installed on the left side of the sleeve frame, and the outer side of the connecting plate is connected with a mounting plate, the connecting plate and the sleeve frame are fixedly connected, and the connecting plate and the mounting plate are fixedly connected, an isolation grid is arranged on the outer side of the sleeve frame, and the isolation grid and the sleeve frame are movably connected, the bottom insulating block is fixed below the main body, a top insulating block is installed above the main body, and a pin is connected to the outer side of the top insulating block, the top insulating block and the main body are fixedly connected, and the pin and the main body are welded, a card slot is arranged at the bottom of the sleeve frame, and an external frame is installed on the inner side of the pin, the sleeve frame and the card slot are fixedly connected, and the pin and the external frame are movably connected.

[0006] Preferably, the copper foil and the interlayer insulator are tightly fitted to the main body, and the copper foil and the interlayer insulator are adhesively connected to the bottom insulating block, and the copper foil and the interlayer insulator are adhesively connected to the top insulating block.

[0007] Preferably, the sleeve includes a bearing, a cover plate, a fixing bolt and a rubber filling layer, a bearing is fixed on the top of the sleeve, and a cover plate is connected above the bearing, the cover plate and the bearing are movably connected, a fixing bolt passes through the top of the cover plate, and the fixing bolt and the cover plate are threadedly connected, a rubber filling layer is bonded to the inner wall of the sleeve, the sleeve forms a clamping structure with the main body through the sleeve, and the cover plate forms a rotating structure with the sleeve through the bearing.

[0008] Preferably, the isolation grid frame includes an isolation net, a slide, a movable groove and a scale frame, the isolation net is fixed inside the isolation grid frame, the slide is installed on the inner side of the isolation grid frame, and the slide and the isolation grid frame are movably connected, the other end of the isolation grid frame is provided with a movable groove, and the scale frame is fixed to the bottom of the movable groove, the movable groove and the slide are movably connected, the isolation grid frame is a disassembly structure through the slide and the sleeve frame, and the isolation grid frame and the isolation net are a nested structure.

[0009] Preferably, the movable groove forms a sliding structure through the scale frame and the slideway, and the slideway and the sleeve frame are welded.

[0010] Preferably, the top insulating block includes a support bar and a fixed block, the support bar is fixed inside the top insulating block, and the fixed block is arranged on the inner side of the support bar, the fixed block and the top insulating block are fixedly connected, the support bar is in the shape of an I-shaped structure, and the cover plate forms a fixed structure with the top insulating block through the fixed block.

[0011] Preferably, the external frame includes a rotating shaft, a rotating plate, an adaptive spring, a buckle plate and a sponge isolation layer, the rotating shaft is arranged below the external frame, and the rotating plate is fixed below the rotating shaft, the external frame is movably connected to the rotating shaft, an adaptive spring is welded to the outside of the rotating plate, and a buckle plate is fixed to the top of the adaptive spring, a sponge isolation layer is bonded to the inside of the buckle plate, two rotating plates are provided, and they are symmetrical about the central axis of the main body, and the external frame forms a disassembly structure with the sleeve through a card slot.

[0012] Preferably, the gusset plate is in the shape of the letter "L", and the gusset plate fits tightly with the sponge isolation layer.

[0013] Preferably, the mounting plate includes a base frame, an inner rod, a ring, a clamping spring and a clamping plate, the base frame is fixed inside the mounting plate, and the inner rod is welded inside the base frame, the ring is installed on the outer side of the inner rod, and the clamping spring is fixed on the outer side of the ring, the inner rod and the ring are movably connected, the clamping plate is connected to the bottom of the clamping spring, and the clamping plate and the clamping spring are fixedly connected, the inner rod and the ring are nested structures, and the clamping plate forms an elastic structure with the ring through the clamping spring.

[0014] Preferably, the clamping plate forms a rotating structure with the inner rod through a sleeve ring, and its rotation range is 0-180°.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present application can protect the main body by setting up the sleeve and the rubber filling layer, prevent the device from being damaged by external factors during use, thereby improving the safety of the device. In addition, the rubber filling layer can reduce the friction between the sleeve and the main body, thereby preventing the sleeve from scratching the copper foil and the interlayer insulator, thereby preventing the coil from being unable to be used normally, and avoiding short circuit of the device due to damage to the copper foil and the interlayer insulator, thereby avoiding fire and improving the safety of the device.

[0017] 2. The present application provides more options for the installation method of the mounting plate by setting the clamping spring and the clamping plate, so that the device can be suitable for different installation locations. At the same time, the use of the inner rod and the ring can fold or open the clamping plate according to actual needs, thereby preventing the fixed clamping plate from being unable to adapt to the installation point, thereby avoiding the device occupying too large an area and causing waste of space at the installation point.

[0018] 3. The present application protects the copper foil and the interlayer insulator by setting up the isolation net, and prevents excessive dust from being adsorbed on the outer wall of the copper foil and the interlayer insulator due to the magnetic field when the coil is running, thereby preventing dust accumulation from causing the coil temperature to be too high, avoiding the coil from burning due to excessive temperature, and thus preventing fire. In addition, different isolation net frames can be adjusted and installed according to the actual size of the coil in the sleeve through the movable slot and the scale frame.

[0019] 4. The present application provides a fixing block so that the installation of the sleeve can be more stable, the firmness between the sleeve and the main body is improved, and the support bar can increase the strength of the top insulating block. When the foil is wound, the top insulating block uses pre-impregnated DMD material and is wound synchronously with the copper foil and the interlayer insulator. After the winding is completed, it is placed in an oven for heating. After heating, the glue on the DMD adheres to the copper foil and the interlayer insulator, and solidifies after cooling, thereby improving the insulation and mechanical strength.

[0020] 5. The present application can adjust the height of the gusset plate according to the actual height of the bottom surface of the bottom insulating block by adapting to the setting of the spring, thereby avoiding the inability to effectively fix the gusset plate and the device, and preventing the gusset plate and the frame from shaking when the device is fixed vertically. In addition, the sponge isolation layer can reduce the gap between the gusset plate and the frame, thereby improving the fixing effect of the gusset plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a low-voltage coil end insulation structure of the present application;

[0022] Figure 2 This is a schematic diagram of a top view of a low-voltage coil end insulation structure of the present application;

[0023] Figure 3 This is a left-side structural schematic diagram of a mounting plate of a low-voltage coil end insulation structure of the present application;

[0024] Figure 4 This is a schematic diagram of an isolation grid structure of a low-voltage coil end insulation structure of the present application;

[0025] Figure 5 A low voltage coil end insulation structure is provided for this application Figure 1 Enlarged structural diagram at A in the middle.

[0026] In the figure: 1. main body; 2. copper foil and interlayer insulator; 3. sleeve; 301. bearing; 302. cover plate; 303. fixing bolt; 304. rubber filling layer; 4. connecting plate; 5. isolation grid; 501. isolation net; 502. slideway; 503. moving groove; 504. scale frame; 6. bottom insulation block; 7. top insulation block; 701. support bar; 702. fixing block; 8. pin; 9. card slot; 10. external frame; 1001. rotating shaft; 1002. rotating plate; 1003. adaptive spring; 1004. buckle plate; 1005. sponge isolation layer; 11. mounting plate; 1101. base frame; 1102. inner rod; 1103. collar; 1104. clamping spring; 1105. clamping plate. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1-5The present application provides a technical solution: a low-voltage coil end insulation structure, including a main body 1, a copper foil and an interlayer insulator 2, a sleeve frame 3, a bearing 301, a cover plate 302, a fixing bolt 303, a rubber filling layer 304, a connecting plate 4, an isolation grid frame 5, an isolation net 501, a slide 502, a movable groove 503, a scale frame 504, a bottom end insulation block 6, a top end insulation block 7, a support bar 701, a fixing block 702, a pin 8, a card slot 9, an external frame 10, a rotating shaft 1001, a rotating plate 1002, an adaptive spring 1003, a buckle plate 1004, a sponge isolation layer 1005, a mounting plate 11, a base frame 1101, an inner rod 1102, a collar 1103, a clamping spring 1104 and a clamping plate 1105, and the outer side of the main body 1 is fixed with a copper foil and an interlayer insulator 2, a sleeve frame 3, a bearing 301, a cover plate 302, a fixing bolt 303, a rubber filling layer 304, a connecting plate 4, an isolation grid frame 5, an isolation net 501, a slide 502, a movable groove 503, a scale frame 504, a bottom end insulation block 6, a top end insulation block 7, a support bar 701, a fixing block 702, a pin 8, a card slot 9, an external frame 10, a rotating shaft 1001, a rotating plate 1002, an adaptive spring 1003, a buckle plate 1004, a sponge isolation layer 1005, a mounting plate 11, a base frame 1101, an inner rod 1102, a collar 1103, The interlayer insulator 2 is provided with a sleeve 3 on the outside of the copper foil and the interlayer insulator 2. The copper foil and the interlayer insulator 2 are movably connected with the sleeve 3. The sleeve 3 includes a bearing 301, a cover plate 302, a fixing bolt 303 and a rubber filling layer 304. The bearing 301 is fixed on the top of the sleeve 3, and the cover plate 302 is connected above the bearing 301. The cover plate 302 and the bearing 301 are movably connected. The fixing bolt 303 passes through the top of the cover plate 302, and the fixing bolt 303 and the cover plate 302 are threadedly connected. The inner wall of the sleeve 3 is bonded with a rubber filling layer 304. The sleeve 3 forms a snap-fit ​​structure with the main body 1 through the sleeve 3, and the cover plate 302 forms a rotating structure with the sleeve 3 through the bearing 301. The main body 1 is placed in the sleeve 3, and then The cover plate 302 is covered with the bearing 301, and then fixed with the fixing bolts 303. The use of the sleeve frame 3 can protect the main body 1 and prevent the device from being damaged by external factors when in use, thereby improving the safety of the device. The rubber filling layer 304 can reduce the friction between the sleeve frame 3 and the main body 1, thereby preventing the sleeve frame 3 from scratching the copper foil and the interlayer insulator 2, thereby preventing the coil from being unable to be used normally, and avoiding the short circuit of the device caused by damage to the copper foil and the interlayer insulator 2, thereby avoiding fire and improving the safety of the device. The connecting plate 4 is installed on the left side of the sleeve frame 3, and the outer side of the connecting plate 4 is connected to the mounting plate 11. The connecting plate 4 and the sleeve frame 3 are fixedly connected, and the connecting plate 4 and the mounting plate 1 1 is fixedly connected, the mounting plate 11 comprises a base frame 1101, an inner rod 1102, a collar 1103, a clamping spring 1104 and a clamping plate 1105, the base frame 1101 is fixed inside the mounting plate 11, and the inner rod 1102 is welded inside the base frame 1101, the outer side of the inner rod 1102 is installed with a collar 1103, and the outer side of the collar 1103 is fixed with a clamping spring 1104, the inner rod 1102 and the collar 1103 are movably connected, the bottom of the clamping spring 1104 is connected with a clamping plate 1105, and the clamping plate 1105 and the clamping spring 1104 are fixedly connected, the inner rod 1102 and the collar 1103 are in a nested structure, and the clamping plate 1105 forms an elastic structure with the collar 1103 through the clamping spring 1104,The clamping plate 1105 forms a rotating structure with the inner rod 1102 through the collar 1103, and its rotation range is 0-180°. Pull the clamping plate 1105, then rotate the clamping plate 1105 outward, and then press the clamping plate 1105 to install the mounting plate 11 in the groove of the target position, and then rotate the clamping plate 1105 to fix it in the specified position under the action of the clamping spring 1104. Because a semi-annular groove is opened on the base frame 1101, the collar 1103 can be rotated 180°. Through the use of the clamping spring 1104 and the clamping plate 1105, the installation method of the mounting plate 11 can have more options, so that the device can be suitable for different installation locations. At the same time, the use of the inner rod 1102 and the collar 1103 can retract or open the clamping plate 1105 according to actual needs, thereby preventing the fixed clamping plate 1105 from being unable to adapt to the installation point, thereby avoiding the waste of space at the installation point caused by the device occupying too large an area;

[0029] An isolation grid frame 5 is arranged on the outer side of the sleeve frame 3, and the isolation grid frame 5 is movably connected to the sleeve frame 3. The isolation grid frame 5 includes an isolation net 501, a slide 502, a movable groove 503 and a scale frame 504. The isolation net 501 is fixed inside the isolation grid frame 5, and a slide 502 is installed on the inner side of the isolation grid frame 5, and the slide 502 and the isolation grid frame 5 are movably connected. A movable groove 503 is arranged on the other end of the isolation grid frame 5, and a scale frame 504 is fixed to the bottom of the movable groove 503, and the movable groove 503 and the slide 502 are movably connected. The isolation grid frame 5 is a disassembly structure with the sleeve frame 3 through the slide 502, and the isolation grid frame 5 and the isolation net 501 are a nested structure. The movable groove 503 is connected to the scale frame 504 through the scale frame 504. The slideway 502 constitutes a sliding structure, and the slideway 502 and the sleeve frame 3 are welded. The isolation grid frame 5 is inserted into the slideway 502, and then the isolation grid frame 5 is fixed. The use of the isolation net 501 can protect the copper foil and the interlayer insulator 2, and prevent the copper foil and the outer wall of the interlayer insulator 2 from absorbing too much dust due to the magnetic field when the coil is running, thereby preventing the dust from accumulating and causing the coil temperature to be too high, avoiding the coil from burning due to excessive temperature, and thus preventing fire. In addition, different isolation grid frames 5 can be adjusted and installed according to the actual size of the coil in the sleeve frame 3 through the movable groove 503 and the scale frame 504. The bottom insulating block 6 is fixed below the main body 1, and the upper part of the main body 1 is installed. The top insulating block 7 is provided, and the outer side of the top insulating block 7 is connected with a pin 8, the top insulating block 7 is fixedly connected to the main body 1, and the pin 8 is welded to the main body 1, the top insulating block 7 includes a support bar 701 and a fixed block 702, the inside of the top insulating block 7 is fixed with the support bar 701, and the inner side of the support bar 701 is provided with a fixed block 702, the fixed block 702 and the top insulating block 7 are fixedly connected, the support bar 701 is in an I-shaped structure, and the cover plate 302 forms a fixed structure with the top insulating block 7 through the fixed block 702, the copper foil and the interlayer insulator 2 are tightly fitted to the main body 1, and the copper foil and the interlayer insulator 2 are bonded to the bottom insulating block 6, and the copper foil and the interlayer insulator 2 and the top insulating block 7 are bonded together. By using the fixing block 702, the installation of the sleeve 3 can be more stable, and the firmness between the sleeve 3 and the main body 1 is improved. Moreover, the support bar 701 can increase the strength of the top insulating block 7. When the foil is wound, the top insulating block 7 adopts pre-impregnated DMD material and is wound synchronously with the copper foil and the interlayer insulator 2. After the winding is completed, it is placed in an oven for heating. After heating, the glue on the DMD adheres to the copper foil and the interlayer insulator 2, and solidifies after cooling, thereby improving the insulation and mechanical strength. A card slot 9 is arranged at the bottom of the sleeve 3, and an external frame 10 is installed on the inner side of the pin 8. The sleeve 3 and the card slot 9 are fixedly connected, and the pin 8 and the external frame 10 are movably connected.The external frame 10 includes a rotating shaft 1001, a rotating plate 1002, an adaptable spring 1003, a gusset plate 1004 and a sponge isolation layer 1005. The rotating shaft 1001 is arranged below the external frame 10, and the rotating plate 1002 is fixed below the rotating shaft 1001. The external frame 10 and the rotating shaft 1001 are movably connected. The adaptable spring 1003 is welded on the outside of the rotating plate 1002, and the gusset plate 1004 is fixed on the top of the adaptable spring 1003. The sponge isolation layer 1005 is bonded to the inside of the gusset plate 1004. Two rotating plates 1002 are provided, and they are symmetrical about the central axis of the main body 1. The external frame 10 forms a disassembly structure with the sleeve frame 3 through the card slot 9. The gusset plate 100 4 is in the shape of the letter "L", and the buckle plate 1004 and the sponge isolation layer 1005 fit tightly together. Push the external frame 10 into the card slot 9, then open the rotating plate 1002 along the rotating shaft 1001, and then buckle the buckle plate 1004 on the sleeve frame 3. The height of the buckle plate 1004 can be adjusted according to the actual height of the bottom surface of the bottom insulation block 6 by adapting to the spring 1003, thereby avoiding the buckle plate 1004 and the device from being unable to be effectively fixed, and preventing the buckle plate 1004 and the sleeve frame 3 from shaking when the device is fixed vertically. In addition, the sponge isolation layer 1005 can reduce the gap between the buckle plate 1004 and the sleeve frame 3, thereby improving the fixing effect of the buckle plate 1004.

[0030] The working principle of this embodiment: The low-voltage coil end insulation structure, when the foil is wound, the top insulation block 7 uses pre-impregnated DMD material and is wound synchronously with the copper foil and the interlayer insulator 2. After the winding is completed, it is placed in an oven for heating. After heating, the glue on the DMD adheres to the copper foil and the interlayer insulator 2, and solidifies after cooling, thereby improving the insulation and mechanical strength. Then the main body 1 is placed in the sleeve 3, and then the cover plate 302 is covered by the bearing 301, and then fixed with the fixing bolts 303. Through the use of the sleeve 3, the main body 1 can be protected to prevent the device from being damaged by external factors during use, thereby improving the safety of the device. In addition, the rubber filling layer 304 can reduce the friction between the sleeve 3 and the main body 1, thereby preventing the sleeve 3 from scratching the copper foil and the interlayer insulator 2. Then pull the clamp 1105, and then rotate the clamp 1 outward. 105, then press the clamping plate 1105 to install the mounting plate 11 in the groove at the target position, then rotate the clamping plate 1105 to fix it in the specified position under the action of the clamping spring 1104, and through the use of the clamping spring 1104 and the clamping plate 1105, there are more options for the installation method of the mounting plate 11, so that the device can be suitable for different installation locations, or the external frame 10 is pushed into the card slot 9, and then the rotating plate 1002 is opened along the rotating shaft 1001, and then the buckle plate 1004 is buckled on the sleeve 3, and the height of the buckle plate 1004 can be adjusted according to the actual height of the bottom surface of the bottom insulating block 6 by adapting to the spring 1003, thereby avoiding the buckle plate 1004 and the device from being unable to be effectively fixed, and preventing the buckle plate 1004 and the sleeve 3 from shaking when the device is fixed vertically. This is the working principle of the low-voltage coil end insulation structure.

[0031] Although the present application 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 application should be included in the protection scope of the present application.

Claims

1. A low-voltage coil end insulation structure, comprising a main body (1), a connecting plate (4) and a bottom end insulation block (6), characterized in that: The outer side of the main body (1) is fixed with a copper foil and an interlayer insulator (2), and a sleeve frame (3) is arranged on the outer side of the copper foil and the interlayer insulator (2), the copper foil and the interlayer insulator (2) and the sleeve frame (3) are movably connected, the connecting plate (4) is installed on the left side of the sleeve frame (3), and the outer side of the connecting plate (4) is connected with a mounting plate (11), the connecting plate (4) and the sleeve frame (3) are fixedly connected, and the connecting plate (4) and the mounting plate (11) are fixedly connected, and an isolation grid frame (5) is arranged on the outer side of the sleeve frame (3). ), and the isolation grid (5) and the sleeve frame (3) are movably connected, the bottom insulation block (6) is fixed below the main body (1), a top insulation block (7) is installed above the main body (1), and the outer side of the top insulation block (7) is connected to a pin (8), the top insulation block (7) and the main body (1) are fixedly connected, and the pin (8) and the main body (1) are welded, a card slot (9) is arranged at the bottom of the sleeve frame (3), and an external frame (10) is installed inside the pin (8), and the sleeve frame (3) and the card slot are connected. (9) are fixedly connected, and the pin (8) and the external frame (10) are movably connected, the copper foil and the interlayer insulator (2) are tightly fitted with the main body (1), and the copper foil and the interlayer insulator (2) and the bottom insulation block (6) are bonded, and the copper foil and the interlayer insulator (2) and the top insulation block (7) are bonded, the sleeve (3) comprises a bearing (301), a cover plate (302), a fixing bolt (303) and a rubber filling layer (304), and the top of the sleeve (3) is fixed with a bearing (301). 1), and a cover plate (302) is connected above the bearing (301), the cover plate (302) and the bearing (301) are movably connected, a fixing bolt (303) passes through the cover plate (302), and the fixing bolt (303) and the cover plate (302) are threadedly connected, a rubber filling layer (304) is bonded to the inner wall of the sleeve (3), the sleeve (3) and the main body (1) form a snap-fit ​​structure through the sleeve (3), and the cover plate (302) and the sleeve (3) form a rotating structure through the bearing (301).

2. The low voltage coil end insulation structure according to claim 1, characterized in that: The isolation grid frame (5) comprises an isolation net (501), a slideway (502), a movable groove (503) and a scale frame (504); the isolation net (501) is fixed inside the isolation grid frame (5); the slideway (502) is installed on the inner side of the isolation grid frame (5); the slideway (502) and the isolation grid frame (5) are movably connected; the other end of the isolation grid frame (5) is provided with a movable groove (503); the bottom of the movable groove (503) is fixed with a scale frame (504); the movable groove (503) and the slideway (502) are movably connected; the isolation grid frame (5) is a disassembly structure with the sleeve frame (3) through the slideway (502); and the isolation grid frame (5) and the isolation net (501) are a nested structure.

3. The low voltage coil end insulation structure according to claim 2, characterized in that: The movable groove (503) forms a sliding structure through the scale frame (504) and the slideway (502), and the slideway (502) and the sleeve frame (3) are welded.

4. The low voltage coil end insulation structure according to claim 1, characterized in that: The top insulating block (7) comprises a support bar (701) and a fixed block (702); the support bar (701) is fixed inside the top insulating block (7), and the fixed block (702) is arranged on the inner side of the support bar (701); the fixed block (702) and the top insulating block (7) are fixedly connected; the support bar (701) is in an I-shaped structure, and the cover plate (302) forms a fixed structure with the top insulating block (7) through the fixed block (702).

5. The low voltage coil end insulation structure according to claim 1, characterized in that: The external frame (10) comprises a rotating shaft (1001), a rotating plate (1002), an adaptable spring (1003), a buckle plate (1004) and a sponge isolation layer (1005). The rotating shaft (1001) is arranged below the external frame (10), and the rotating plate (1002) is fixed below the rotating shaft (1001). The external frame (10) and the rotating shaft (1001) are movably connected. The adaptable spring (1003) is welded to the outer side of the rotating plate (1002), and the buckle plate (1004) is fixed on the top of the adaptable spring (1003). The sponge isolation layer (1005) is bonded to the inner side of the buckle plate (1004). Two rotating plates (1002) are provided, and they are symmetrical with respect to the central axis of the main body (1). The external frame (10) forms a disassembly structure with the sleeve frame (3) through a slot (9).

6. A low voltage coil end insulation structure according to claim 5, characterized in that: The buckle plate (1004) is in the shape of a letter "L" and the buckle plate (1004) and the sponge isolation layer (1005) are tightly fitted.

7. The low voltage coil end insulation structure according to claim 1, characterized in that: The mounting plate (11) comprises a base frame (1101), an inner rod (1102), a collar (1103), a clamping spring (1104) and a clamping plate (1105); the base frame (1101) is fixed inside the mounting plate (11), the inner rod (1102) is welded inside the base frame (1101), the outer side of the inner rod (1102) is mounted with a collar (1103), and the outer side of the collar (1103) is fixed with a clamping spring (1104). 1104), the inner rod (1102) and the collar (1103) are movably connected, the bottom of the clamping spring (1104) is connected with a clamping plate (1105), and the clamping plate (1105) and the clamping spring (1104) are fixedly connected, the inner rod (1102) and the collar (1103) are in a nested structure, and the clamping plate (1105) forms an elastic structure through the clamping spring (1104) and the collar (1103).

8. The low voltage coil end insulation structure according to claim 7, characterized in that: The clamping plate (1105) forms a rotating structure with the inner rod (1102) through the collar (1103), and the rotation range is 0-180 degrees.

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