Wiring device for transformer

Abstract

The invention discloses a wiring device used on a transformer, and relates to the field of transformer wiring, the wiring device comprises a transformer body and a metal wiring device installed on a wiring stud of the transformer body, the metal wiring device comprises a fixing block and a wiring block, the fixing block is provided with a metal sleeve, and the wiring block is provided with a wiring hole. The metal sleeve is connected to the wiring stud in a threaded fit mode, a first groove and a second groove are formed in the inner wall of the metal sleeve, the metal sleeve rotates downwards, the grinding block can move in a matched mode along the track of a threaded groove firstly, the threaded groove of the wiring stud is ground, protrusions and burrs on the threaded groove are removed, and after the grinding block moves, the metal sleeve is fixed to the wiring stud. The silver block moves along the moving track of the polishing block, due to the fact that the material of the silver block is soft, when the silver block encounters a concave part in the thread groove, the silver block rubs with the concave part, and therefore the concave part is filled with silver scraps falling off through friction, and the conductive effect is enhanced.

Description

Technical Field

[0001] The present invention relates to the field of transformer wiring, and particularly relates to a wiring device for a transformer. Background Art

[0002] A transformer is a device for transforming AC voltage, current, and impedance. When an alternating current passes through the primary coil, an alternating magnetic flux is generated in the iron core (or magnetic core), causing a voltage (or current) to be induced in the secondary coil. A transformer wiring device is used to fix and conductively connect an external wire to a transformer wiring stud, and generally includes a fastening mechanism for fixedly connecting the transformer wiring stud and a wiring mechanism for fixedly connecting the wire.

[0003] As disclosed in a patent with the name: A Transformer Wiring Device (Patent Application No.: 201911009517.6), through the mutual cooperation of a crimping sleeve, a constriction hole, and a tensioning bolt, when the crimping sleeve is threadedly connected to the transformer wiring stud, several elastic crimping pieces of the conical crimping cylinder contract inward to circumferentially hold the transformer wiring stud tightly, making the conical crimping cylinder and the transformer wiring stud in a locked state, resulting in a large conductive contact area. Since the device and the wiring stud are threadedly connected, before installing the device, the wiring stud is exposed to the air, and the outer side of the wiring stud is subject to impacts during transportation or corrosion by the environment, and impurities may adhere to or depressions may occur in the thread groove of the stud, which easily affects the conductive effect or the connection effect.

[0004] Therefore, it is very necessary to propose a wiring device for a transformer to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a wiring device for a transformer to solve the problem that in the comparative document, since the device and the wiring stud are threadedly connected, before installing the device, the wiring stud is exposed to the air, and the outer side of the wiring stud is subject to impacts during transportation or corrosion by the environment, and impurities may adhere to or depressions may occur in the thread groove of the stud, which easily affects the conductive effect or the connection effect.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A wiring device for a transformer, including a transformer body and a metal wiring device installed on a wiring stud of the transformer body, the metal wiring device including a fixed block and a wiring block;

[0007] A metal sleeve is provided on the fixed block, and the metal sleeve is threadedly connected to the wiring stud through a thread fit;

[0008] A first groove and a second groove are provided on the inner wall of the metal sleeve, and a silver block and a polishing block are respectively arranged in an elastically telescopic manner in the first groove and the second groove;

[0009] Among them, the grinding block is used to grind the inner wall of the thread groove on the terminal stud;

[0010] The friction between the silver block and the inner wall of the thread groove on the terminal stud forms silver flakes, which fill the gaps in the thread groove on the terminal stud.

[0011] According to the claim, a wiring device for a transformer is characterized in that: an insulating cleaning ring is connected to the bottom end of the metal sleeve, and a cleaning brush is fixed on the inner side of the insulating cleaning ring.

[0012] Preferably, the insulating cleaning ring is provided with an air hole on the outside, the outer wall of the metal sleeve is provided with an arc-shaped air passage, and the junction block is provided with a ventilation duct, and the air hole, the arc-shaped air passage and the ventilation duct are connected in sequence;

[0013] The outer side of the metal wiring device is attached with an insulating skin;

[0014] When hot air is charged into the metal wiring device through the air holes, the insulating skin is stretched and expanded, and when the gas inside the metal wiring device is extracted, the insulating skin shrinks and covers the outer surface of the metal wiring device.

[0015] Preferably, the fixing block and the wiring block are rotationally connected.

[0016] Preferably, a wiring slot for the power supply line to enter and connect is opened at one end of the wiring block away from the fixed block, a clamping screw is threadedly installed on the top of the wiring block, a wire pressing plate is slidably installed in the wiring slot, and the bottom end of the clamping screw is attached to the upper surface of the wire pressing plate.

[0017] Preferably, the first groove and the second groove are distributed up and down on the inner wall of the T-shaped through groove, springs are fixed inside the first groove and the second groove, the silver block and the polishing block are respectively connected to the two spring ends, and the silver block and the polishing block extend out of the corresponding first groove and second groove, and the metal sleeve is provided with an internal thread that cooperates with the outer thread of the terminal stud.

[0018] Preferably, a fixed baffle is fixedly connected to the top of the metal sleeve, a screw hole is provided on the top of the fixed baffle, the top of the fixed baffle is pressed against the top of the fixed block, a gasket is provided below the fixed baffle, and the gasket is sleeved on the outside of the metal sleeve.

[0019] Preferably, a tapered mouth is threadedly installed on one side of the wiring slot away from the fixed block, the diameter of the tapered mouth away from the fixed block is smaller than the diameter of the end close to the fixed block, an injection hole is opened on the outside of the tapered mouth, the bottom end of the injection hole is connected to the inside of the tapered mouth, the bottom end of the insulation cleaning ring extends out of the bottom end of the fixed block, and the outside of the insulation cleaning ring is coated with insulating paint.

[0020] Preferably, a T-shaped through groove is provided on the fixed block, and the metal sleeve is connected in the T-shaped through groove by screw fit;

[0021] A fixing plate is connected to the outer top end of the metal sleeve, an insertion post is provided on the fixed block, and the fixing plate is fixed by the insertion post;

[0022] One end of the insertion post is provided with a mounting head, a limiting hole is opened at the end of the insertion post extending out of the fixed block, a positioning pin is arranged in the limiting hole, a fluorescent strip is also arranged on the insertion post, and the screw mouth corresponds to the mounting head;

[0023] Preferably, jacks and through openings corresponding to the insertion posts are respectively opened on the fixing plate and the T-shaped through groove;

[0024] A limiting hole is opened at the end of the insertion post extending out of the fixed block, and the positioning pin is installed in the limiting hole.

[0025] The technical effects and advantages of the present invention:

[0026] 1. In the actual operation of the present invention, when the metal sleeve rotates into the T-shaped through groove, the inner part of the metal sleeve will be in screw fit with the outer thread of the wiring stud to complete the fixed connection. At the same time, the outer part of the metal sleeve will be fixedly connected to the inner thread of the T-shaped through groove. When the metal sleeve completely extends into the T-shaped through groove, the connection of the fixed block and the wiring stud can be completed at the same time. At the same time, the inner thread is provided inside the metal sleeve to cooperate with the outer side of the wiring stud, which can make full contact with the thread on the outer side of the wiring stud, maximize the conductive area, and improve the conductive effect.

[0027] 2. In the actual operation of the present invention, when the inner thread of the metal sleeve is installed on the wiring stud, the metal sleeve rotates downward, and the cleaning brush inside the insulating cleaning ring will move downward to clean the outer side of the wiring stud, removing the dust and impurities on the wiring stud to avoid the influence of impurities and dust on the conductive effect and connection.

[0028] 3. Since both the silver block and the grinding block correspond to the thread groove of the wiring stud, when the metal sleeve rotates downward, the grinding block will first move along the track of the thread groove to grind the thread groove of the wiring stud, removing the protrusions and burrs on the thread groove to ensure that the thread groove of the wiring stud can match smoothly with the inner side of the metal sleeve or grind off the easily falling parts. When the movement of the grinding block is completed, the silver block moves along the movement track of the grinding block. Due to the relatively soft material of the silver block itself, when it encounters the concave part inside the thread groove, it will rub against the concave part, so as to fill the concave part with the silver chips falling off due to friction, enhance the conductive effect, fill the gap, and improve the overall structural strength at the same time.

[0029] 4. The wire can extend into the interior of the wiring groove. After the wire extends in, by screwing in the compression screw, the compression screw can squeeze the pressure plate to move downward, so that the pressure plate can press and fix the extended wire. Since the bare inner wire core after removing the outer skin is used for connection when the wire is connected, after the pressing and fixing is completed, the wiring block can be rotated to make the compression screw face downward. At the same time when the wiring block rotates, the part of the wire that is press-fitted and fixed can be driven to twist, so that the loose wire cores are fixed and tightened together by twisting. Since the compression screw faces downward and is blocked by the wiring block above, the corrosion effect of rainwater can be reduced and the service life can be improved.

[0030] 5. After the metal sleeve is connected, the insulation cleaning ring will extend out of the bottom end of the fixed block. At this time, an insulating skin can be sleeved outside the metal wiring device, and the insulation cleaning ring is exposed outside the insulating skin. By connecting the air charging and suction device to the air hole and blowing the gas, the insulating skin can be bulged for preliminary shaping to avoid phenomena such as bulging caused by the premature connection of some positions of the insulating skin to the surface of the metal wiring device; after the inflation is completed, the gas is sucked out again. The bulged insulating skin can be tightly wrapped and adhered to the outer surface of the metal wiring device by the action of negative pressure suction, avoiding the phenomenon of bulging at some positions, and the redundant air inside the metal wiring device can be discharged by the suction method to achieve a vacuum environment, reducing the generation of arc and oxidation at the wiring part, and correspondingly increasing the service life of the metal wiring device.

[0031] 6. The air flow can make the inside of the fixed block and the wiring block in a through state to ensure the flow of the air flow. After the hot air is discharged, the air hole can be sucked by the air charging and suction device. The suction force can make the inside of the fixed block and the wiring block in a relatively vacuum environment, and the suction effect can accelerate the discharge of the air between the insulating skin and the metal wiring device. The generated negative pressure can make the insulating skin firmly adhere to the outside of the metal wiring device to form a fitting and fixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic structural diagram of the wiring device for a transformer according to the present invention.

[0033] Figure 2 It is a schematic structural diagram of the metal wiring device according to the present invention.

[0034] Figure 3 It is a schematic structural diagram of the metal sleeve and the insulation cleaning ring according to the present invention.

[0035] Figure 4 It is a schematic internal structure diagram of the metal sleeve according to the present invention.

[0036] Figure 5 For the present invention Figure 3 The enlarged schematic diagram at position A in

[0037] Figure 6 For the present invention Figure 4 is a magnified schematic view of part B in the present invention.

[0038] Figure 7 For the present invention Figure 4 is a magnified schematic view of part C in the present invention.

[0039] Figure 8 is a schematic view of the internal structure of the wiring block of the present invention.

[0040] In the figure: 1, metal wiring device; 2, fixing block; 3, wiring block; 4, conical opening; 5, pressing screw; 6, fixing retaining disc; 7, screw thread; 8, metal sleeve; 9, insulating cleaning ring; 10, air hole; 11, T-shaped through groove; 12, plug post; 13, positioning pin; 14, mounting head; 15, fluorescent strip; 16, first groove; 17, second groove; 18, silver block; 19, grinding block; 20, spring; 21, internal thread; 22, fixing plate; 23, gasket; 24, jack; 25, wire pressing plate; 26, arc-shaped air duct; 27, ventilation duct; 28, injection hole; 29, through port; 30, transformer body; 31, wiring groove. Detailed implementation manners

[0041] The present invention provides a wiring device for a transformer as shown in Figures 1 to 8 the figure, including a transformer body 30 and a metal wiring device 1 mounted on the wiring stud of the transformer body 30. The metal wiring device 1 includes a fixing block 2 and a wiring block 3, and the fixing block 2 and the wiring block 3 are rotatably connected. It should be noted that both the fixing block 2 and the wiring block 3 are made of metal.

[0042] The fixing block 2 is used to connect the wiring stud, and the wiring block 3 is used to connect the wire, so that the wire can be connected to the transformer body 30 and support the wire.

[0043] The top end of the fixing block 2 is provided with a T-shaped through groove 11. At the same time, the bottom end of the T-shaped through groove 11 penetrates through the bottom end of the fixing block 2. A metal sleeve 8 is threadedly installed inside the T-shaped through groove 11. The outer side of the metal sleeve 8 is threadedly installed in the T-shaped through groove 11, and the inner side of the metal sleeve 8 is threadedly connected to the wiring stud. An internal thread 21 that matches the outer thread of the wiring stud is provided inside the metal sleeve 8.

[0044] In the actual operation of the present invention, when the metal sleeve 8 rotates into the T-shaped through groove 11, the inside of the metal sleeve 8 will be threadedly engaged with the outer side of the wiring stud to complete the fixed connection. At the same time, the outer side of the metal sleeve 8 will be fixedly connected to the inner side of the T-shaped through groove 11 by threads. When the metal sleeve 8 completely extends into the T-shaped through groove 11, the connection of both the fixing block 2 and the wiring stud can be completed simultaneously.

[0045] Meanwhile, the inner side of the metal sleeve 8 is provided with internal threads 21 which cooperate with the outer side of the wiring stud, enabling complete fitting contact with the threads on the outer side of the wiring stud, maximizing the conductive area and improving the conductive effect.

[0046] The top end of the metal sleeve 8 is fixedly connected with a fixed retaining disc 6. A screw thread 7 is provided at the top end of the fixed retaining disc 6. The top end of the fixed retaining disc 6 is pressed against the top end of the fixed block 2. A gasket 23 is provided below the fixed retaining disc 6. The gasket 23 is sleeved on the outer side of the metal sleeve 8. When the metal sleeve 8 is completely inserted into the T-shaped through groove 11, the fixed retaining disc 6 will block the top end of the T-shaped through groove 11, and the fixed retaining disc 6 will be pressed against the top end of the fixed block 2, playing a role in pressing and fixing the fixed block 2 and the wiring stud, and improving the stability and structural strength of the structure.

[0047] A silver block 18 and a grinding block 19 are telescopically connected inside the metal sleeve 8. The grinding block 19 is arranged below the silver block 18, and both the silver block 18 and the grinding block 19 correspond to the thread grooves of the wiring stud. A cleaning brush is fixed inside the insulating cleaning ring 9. The inside of the insulating cleaning ring 9 communicates with the inside of the metal sleeve 8. The diameter of the insulating cleaning ring 9 is the same as that of the metal sleeve 8.

[0048] In the actual operation of the present invention, when the internal threads of the metal sleeve 8 are threadedly installed on the wiring stud, the metal sleeve 8 rotates downward. The cleaning brush inside the insulating cleaning ring 9 will move downward to clean the outer side of the wiring stud, removing dust and impurities on the wiring stud, and preventing impurities and dust from affecting the conductive effect and connection.

[0049] Furthermore, since both the silver block 18 and the grinding block 19 correspond to the thread grooves of the wiring stud, when the metal sleeve 8 rotates downward, the grinding block 19 will first move along the trajectory of the thread groove to grind the thread groove of the wiring stud, removing protrusions and burrs on the thread groove, ensuring that the thread groove of the wiring stud can match smoothly with the inner side of the metal sleeve 8 or grinding off the easily detachable parts. When the movement of the grinding block 19 is completed, the silver block 18 moves along the movement trajectory of the grinding block 19. Since the material of the silver block 18 itself is relatively soft, when it encounters a concave part inside the thread groove, it will rub against the concave part, and thus the silver chips falling off due to friction will fill the concave part to a certain extent, enhancing the conductive effect and improving the overall structural strength while filling the gap.

[0050] Specifically, a first groove 16 and a second groove 17 are opened vertically inside the T-shaped through groove 11. Springs 20 are fixed inside both the first groove 16 and the second groove 17. The silver block 18 and the grinding block 19 are respectively connected to the ends of the two springs 20, and the silver block 18 and the grinding block 19 respectively extend out of the corresponding first groove 16 and second groove 17.

[0051] In the actual operation of the present invention, since the silver block 18 and the grinding block 19 are connected by a spring 20, it can be ensured that the silver block 18 and the grinding block 19 can always fit with the thread groove of the wiring stud, avoiding the wear of the silver block 18 and the grinding block 19 caused by friction with the thread groove, so that the silver block 18 and the grinding block 19 cannot be used continuously.

[0052] In actual use, since the transformer body 30 is at a high place, the metal wiring device 1 and the wiring stud will vibrate under the influence of wind force. The vibration will cause the metal sleeve 8 to shake, so as to be disengaged from the T-shaped through groove 11, affecting the safety of use. Therefore, a fixing plate 22 is connected to the outer top end of the metal sleeve 8. One side of the fixing plate 22 is inserted with a plug post 12. One end of the plug post 12 penetrates through the other side of the fixing plate 22. The fixing plate 22 and the T-shaped through groove 11 are respectively provided with jacks 24 and through openings 29 corresponding to the plug post 12.

[0053] One end of the plug post 12 extends out of the fixing block 2. The end of the extending end has a mounting head 14. A limiting hole is provided on the outer side of the extending end. A positioning pin 13 is arranged in the limiting hole. A fluorescent strip 15 is embedded on the outer side of the extending end.

[0054] In the actual operation of the present invention, when the metal sleeve 8 completely extends into the T-shaped through groove 11, the fixing plate 22 will rotate into the interior of the T-shaped through groove 11, and at this time, the jack 24 of the fixing plate 22 will correspond to the position of the through opening 29. At this time, after the plug post 12 is inserted into the jack 24 and the through opening 29, the position of the metal sleeve 8 can be fixed, avoiding the up and down or left and right movement of the metal sleeve 8, improving the safety of use and enhancing the structural stability.

[0055] The screw port 7 corresponds to the mounting head 14. In the actual operation of the present invention, when the plug post 12 is separated from the fixing block 2, the plug post 12 and the mounting head 14 can be used as a tightening tool. The mounting head 14 can be inserted into the screw port 7, and the metal sleeve 8 can be threadedly connected by rotating the plug post 12, extending the installation length, improving the convenience of use. Without tools, the installation can still be achieved. Moreover, a fluorescent strip 15 is added on the outer side of the plug post 12, which can absorb light energy during the day and emit light at night. When the metal wiring device 1 is damaged and needs to be repaired, it is convenient for personnel to quickly find the position of the plug post 12 and use it as a temporary tool. And by pulling out the plug post 12, the metal wiring device 1 and the wiring stud can be quickly disassembled.

[0056] Furthermore, after the positioning pin 13 is inserted into the limiting hole, the position of the plug post 12 can be fixed, avoiding the movement of the plug post 12 in the fixing block 2 or the separation from the fixing block 2, and improving the strength of the structure.

[0057] After the metal sleeve 8 is installed, the insulating cleaning ring 9 will extend out of the bottom end of the fixing block 2, so as to block and isolate between the fixing block 2 and the external umbrella group of the wiring stud, avoiding too close a distance.

[0058] One end of the wiring block 3 away from the fixing block 2 is provided with a wiring groove 31 for the power line to enter and connect. A pressing screw 5 is installed on the top of the wiring block 3 in a threaded manner. A pressing plate 25 is slidably installed up and down in the wiring groove 31, and the bottom end of the pressing screw 5 is attached to the upper surface of the pressing plate 25.

[0059] In the actual operation of the present invention, the wire can extend into the interior of the wiring groove 31. After the wire extends in, by screwing in the pressing screw 5, the pressing screw 5 can be used to squeeze the pressing plate 25 to move downward, so that the pressing plate 25 can press and fix the extended wire. Since when the wire is connected, the bare inner wire core after removing the outer skin is used for connection. After the pressing and fixing is completed, the wiring block 3 can be rotated to make the pressing screw 5 face downward. At the same time when the wiring block 3 rotates, the wire part that is pressed and fixed can be driven to twist, which is convenient for improving the connection strength of the wire core end. The loose wire cores are fixed and tightened together by twisting. And because the pressing screw 5 faces downward and is blocked by the wiring block 3 above, the corrosion effect of rainwater can be reduced and the service life can be improved.

[0060] Similarly, when it is necessary to disassemble the wire and the wiring block 3, by rotating the wiring block 3 to make the pressing screw 5 face upward, it is convenient for personnel to have enough space from above to remove the pressing screw 5, and the light is better. At the same time, the rotation of the wiring block 3 can reset the twisted wire core, reduce the torsion force, and loosen the tightened wire cores, which is convenient for personnel to disassemble.

[0061] A tapered opening 4 is installed on the side of the wiring groove 31 away from the fixing block 2 in a threaded manner. The diameter of one end of the tapered opening 4 away from the fixing block 2 is smaller than that of the end close to the fixing block 2. An injection hole 28 is opened on the outer side of the tapered opening 4, and the bottom end of the injection hole 28 is communicated with the inside of the tapered opening 4.

[0062] The tapered opening 4 can be detachably connected to the wiring groove 31 in a threaded manner. When the wire is connected, it can be sleeved on the outer side of the wire, and the smaller end is used to clamp and fix the outer side of the wire.

[0063] The bottom end of the metal sleeve 8 is connected with an insulating cleaning ring 9. An air hole 10 is opened on the outer side of the insulating cleaning ring 9. An arc-shaped air duct 26 is opened on the outer wall of the metal sleeve 8. An air ventilation duct 27 is arranged in the wiring block 3. The air hole 10, the arc-shaped air duct 26 and the air ventilation duct 27 are communicated in sequence. A valve core is arranged inside the air hole 10.

[0064] In the actual operation of the present invention, after the metal sleeve 8 is connected, the insulating cleaning ring 9 will extend out of the bottom end of the fixing block 2. At this time, an insulating skin can be sleeved outside the metal wiring device 1, while the insulating cleaning ring 9 is exposed outside the insulating skin. It should be noted that when fixing the insulating skin, the inner walls of both ends of the insulating skin are heated to a certain extent first. Conveniently portable tools such as an electric pressing plate can be used. Then, the insulating skin is wrapped around the metal wiring device 1, and both ends of the insulating skin adhere to both ends of the metal wiring device 1 to achieve sealing.

[0065] By connecting an air charging and suction device (such as a hot air suction pump) to the air hole 10, hot air is first blown into the air hole 10. The hot air passes through the arc-shaped air duct 26 and enters the inside of the wiring groove 31 through the ventilation pipe 27 and blows outwards. Through the blowing of the gas, the insulating skin bulges for preliminary shaping, avoiding phenomena such as bulging caused by premature connection of some positions of the insulating skin to the surface of the metal wiring device 1; after the inflation is completed, the gas is then sucked out. The bulged insulating skin can be insulated and tightly adhered to the outer surface of the metal wiring device 1 by the action of negative pressure suction, avoiding the phenomenon of bulging at some positions, and through the suction method, the excess air inside the metal wiring device 1 can be discharged to achieve a vacuum environment, reducing the generation of electric arcs and oxidation at the wiring point, and correspondingly increasing the service life of the metal wiring device 1.

[0066] Furthermore, hot air is introduced into the metal wiring device 1. Since the hot air just heats the metal sleeve 8 through the arc-shaped air duct 26, after the metal sleeve 8 is heated, the silver chips can be better hot-pressed into the recessed part of the thread groove, improving the tightness and connection strength of the silver chips.

[0067] Still further, the insulating skin generally has an adhesive layer inside, which can be softened when heated by the hot air, improving the adhesion of the insulating skin, so that the insulating skin can better adhere to the outer surface of the metal wiring device 1.

[0068] It should be noted that an insulating coating is applied outside the insulating cleaning ring 9 to further ensure the insulating effect of the insulating cleaning ring 9.

Claims

1. A wiring device for a transformer, comprising a transformer body (30) and a metal wiring device (1) mounted on a wiring stud of the transformer body (30), characterized in that: The metal wiring device (1) comprises a fixing block (2) and a wiring block (3); The fixing block (2) is provided with a metal sleeve (8), and the metal sleeve (8) is connected to the terminal stud by threaded fitting; The inner wall of the metal sleeve (8) is provided with a first groove (16) and a second groove (17), and a silver block (18) and a polishing block (19) are elastically and telescopically arranged in the first groove (16) and the second groove (17); Wherein, the grinding block (19) is used for grinding the inner wall of the thread groove on the terminal stud; The friction between the silver block (18) and the inner wall of the thread groove on the terminal stud forms silver flakes, which fill the gap of the thread groove on the terminal stud.

2. A wiring device for a transformer according to claim 1, characterized in that: The bottom end of the metal sleeve (8) is connected to an insulating cleaning ring (9), and a cleaning brush is fixed inside the insulating cleaning ring (9).

3. A wiring device for a transformer according to claim 1, characterized in that: The insulating cleaning ring (9) is provided with an air hole (10) on the outside, the outer wall of the metal sleeve (8) is provided with an arc-shaped air passage (26), and a ventilation pipe (27) is provided inside the wiring block (3), and the air hole (10), the arc-shaped air passage (26) and the ventilation pipe (27) are connected in sequence; The outer side of the metal wiring device (1) is bonded with an insulating skin; When hot air is injected into the metal wiring device (1) through the air holes (10), the insulating skin is expanded and expanded; when the air inside the metal wiring device (1) is extracted, the insulating skin shrinks and covers the outer surface of the metal wiring device (1).

4. A wiring device for a transformer according to claim 1, characterized in that: The fixing block (2) and the wiring block (3) are rotationally connected.

5. A wiring device for a transformer according to claim 1, characterized in that: The terminal block (3) is provided with a terminal slot (31) for the power supply line to enter and connect at one end away from the fixed block (2); a clamping screw (5) is threadedly installed on the top of the terminal block (3); a wire pressing plate (25) is slidably installed in the terminal slot (31); and the bottom end of the clamping screw (5) is attached to the upper surface of the wire pressing plate (25).

6. A wiring device for a transformer according to claim 1, characterized in that: The first groove (16) and the second groove (17) are distributed up and down, and springs (20) are fixed inside the first groove (16) and the second groove (17). The silver block (18) and the grinding block (19) are respectively connected to the ends of the two springs (20), and the silver block (18) and the grinding block (19) extend out of the corresponding first groove (16) and the second groove (17). The metal sleeve (8) is provided with an internal thread (21) that matches the outer thread of the terminal stud.

7. A wiring device for a transformer according to claim 1, characterized in that: The top of the metal sleeve (8) is fixedly connected to a fixed baffle (6), the top of the fixed baffle (6) is provided with a screw hole (7), the top of the fixed baffle (6) is pressed tightly against the top of the fixed block (2), a gasket (23) is provided below the fixed baffle (6), and the gasket (23) is sleeved on the outside of the metal sleeve (8).

8. A wiring device for a transformer according to claim 5, characterized in that: A conical opening (4) is threadedly mounted on one side of the wiring slot (31) away from the fixed block (2); the diameter of the conical opening (4) at the end away from the fixed block (2) is smaller than the diameter of the end close to the fixed block (2); an injection hole (28) is provided on the outside of the conical opening (4); the bottom end of the injection hole (28) is connected to the inside of the conical opening (4); the bottom end of the insulating cleaning ring (9) extends out of the bottom end of the fixed block (2), and the outside of the insulating cleaning ring (9) is coated with insulating paint.

9. A wiring device for a transformer according to claim 1, characterized in that: The fixing block (2) is provided with a T-shaped through groove (11), and the metal sleeve (8) is connected in the T-shaped through groove (11) by threaded engagement; The top end of the outer side of the metal sleeve (8) is connected to a fixing plate (22), and a plug post (12) is provided on the fixing block (2), and the fixing plate (22) is fixed by the plug post (12); One end of the plug post (12) is provided with a mounting head (14); one end of the plug post (12) extending out of the fixing block (2) is provided with a limiting hole; a positioning pin (13) is provided in the limiting hole; a fluorescent strip (15) is also provided on the plug post (12); and the screw hole (7) corresponds to the mounting head (14).

10. A wiring device for a transformer according to claim 9, characterized in that: The fixing plate (22) and the T-shaped through groove (11) are respectively provided with a plug hole (24) and a through hole (29) corresponding to the plug column (12); One end of the plug post (12) extending out of the fixing block (2) is provided with a limiting hole, and the positioning pin (13) is installed in the limiting hole.

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