Electric tool with live insulation of exposed busbar portion

Abstract

The present application relates to a kind of electric tools for the live part of busbar insulation encapsulation, including insulated operating rod, still including encapsulation sleeve assembly, compaction component and execution component;The execution component is arranged at the end of insulated operating rod, and the compaction component is arranged on execution component;The encapsulation sleeve assembly includes heat shrink sleeve and the mounting piece on heat shrink sleeve, and the compaction component includes two insulation sleeve seats fixed on execution component, and the connecting piece for being inserted on mounting piece is arranged on two insulation sleeve seats, and heating strip is also arranged on two insulation sleeve seats, heat shrink sleeve is arranged between two insulation sleeve seats, and heat shrink sleeve is compacted on busbar and encapsulation is completed by the mutual extrusion of two insulation sleeve seats, can keep the stability of device while avoiding the problem of excessive heating time of heat shrink sleeve.

Description

TECHNICAL FIELD

[0001] The application relates to a power tool for live insulation encapsulation of exposed parts of a busbar, and belongs to the technical field of insulation encapsulation. BACKGROUND

[0002] In a power system, in order to ensure safety and improve reliability, it is necessary to insulate key components of a substation, according to the requirements of Article 2.1.24 of the South Power Company, the 6-35kV medium (low) voltage side lead of a 220kV and below main transformer, outdoor busbar (not including overhead busbar) and terminal should be insulated; and for a 500(330)kV transformer, the lead from the 35kV bushing to the busbar is also recommended to be insulated; in addition, the 10kV overhead line within 2km of the substation outlet should use insulated conductors.

[0003] However, the traditional insulation encapsulation method has significant limitations and safety hazards, such as the main transformer low-voltage side live insulation encapsulation device disclosed in Chinese patent CN118888320A, which moves into the block and inserts into the block to keep the encapsulation sleeve stable; however, during use, when the device is shaken, the entering block moves in the opposite direction and can slide out of the penetrating block, i.e., the device has poor stability. SUMMARY

[0004] In order to solve the above-mentioned problems existing in the prior art, the application provides a power tool for live insulation encapsulation of exposed parts of a busbar, which can maintain the stability of the device and avoid the problem of too long heating time of the heat-shrinkable sleeve.

[0005] The technical scheme of the application is as follows:

[0006] A power tool for live insulation encapsulation of exposed parts of a busbar, comprising an insulated operating rod, a encapsulation sleeve assembly, a compaction assembly and an execution assembly; the execution assembly is arranged at the end of the insulated operating rod, and the compaction assembly is arranged on the execution assembly; the encapsulation sleeve assembly comprises a heat-shrinkable sleeve and a mounting piece arranged on the heat-shrinkable sleeve, the compaction assembly comprises two insulated sleeve seats fixed on the execution assembly, connecting pieces for inserting into the mounting pieces are arranged on the two insulated sleeve seats, and heating strips are also arranged on the two insulated sleeve seats; the heat-shrinkable sleeve is arranged between the two insulated sleeve seats, and the heat-shrinkable sleeve is compacted on the busbar and encapsulation is completed by the two insulated sleeve seats being pressed towards each other.

[0007] The heat-shrinkable sleeve is elliptical, and one side of the elliptical heat-shrinkable sleeve is disconnected; the mounting piece has two, and the two mounting pieces are respectively mounted on the upper end outer surface and the lower end outer surface of the heat-shrinkable sleeve; and a temperature sensing assembly is arranged inside the two mounting pieces.

[0008] Wherein, both ends of the insulating sleeve seat are arc-shaped and are bent towards the connecting member. A plurality of strip-shaped grooves are arranged at intervals on the arc-shaped bending part of the insulating sleeve seat, and the strip-shaped grooves on the arc-shaped bending parts of the two insulating sleeve seats are arranged staggeredly.

[0009] Wherein, the connecting member is in a "mouth" shape.

[0010] Wherein, the cross-section of the mounting member is L-shaped. A limiting block is rotatably connected to the side wall of the mounting member through a torsion spring. A magnetic block is arranged at the end of the limiting block. Electromagnets are arranged on the outer surfaces of the upper end and the lower end of the heat shrink sleeve. The electromagnets generate electromagnetic force through an electric control component. The electromagnets and the magnetic blocks are matched; the connecting member is inserted into the mounting member and the limiting block prevents the connecting member from slipping out.

[0011] Wherein, a cavity is arranged inside the mounting member. A fixed seat is arranged at the top of the cavity. The electric control component includes two wires and a copper sheet button located inside the cavity. One end of the copper sheet button is fixedly arranged at the bottom of the fixed seat, and the other end of the copper sheet button is a movable end. A spring is installed between the top of the movable end of the copper sheet button and the surface of the cavity; a base is also fixedly arranged at the bottom of the cavity. Two fixing points are installed on the top of the base and form a closed circuit with the copper sheet button when the copper sheet button is not pressed through the two fixing points; one end of the wire is connected to the positive pole of the dry battery, and the other end of the wire is connected to one of the fixing points on the base. The other fixing point on the base is connected to one end of the coil of the electromagnet, and the other end of the coil of the electromagnet is connected to the negative pole of the dry battery.

[0012] Wherein, the temperature sensing component includes a bimetal thermostat. After the heating strip heats up, the bimetal thermostat bends towards the heating strip and makes the movable end of the copper sheet button翘起 and separate from the two fixing points to form an open circuit.

[0013] Wherein, the execution component includes a first support plate arranged at the upper end of the end of the insulating operating rod. The upper surface of the first support plate is fixedly connected to the lower surface of one of the insulating sleeve seats. The rear end of the first support plate extends beyond the insulating sleeve seat, and a notch is formed on the part of the first support plate that extends beyond the insulating sleeve seat. A first rotating motor is arranged on the side wall of the first support plate. The output end of the first rotating motor is fixedly provided with a rotating shaft. The rotating shaft rotates through the first support plate, and a rotating plate is fixedly installed on the part of the rotating shaft located in the notch. A lifting mechanism is arranged on the top of the rotating plate. The lifting mechanism is used to control the two insulating sleeve seats to squeeze each other.

[0014] The lifting mechanism includes a lifting seat located on top of a rotating plate. The lifting seat has a hollow interior and a vertical sliding opening facing the insulating sleeve. The sliding opening communicates with the interior of the lifting seat. A second rotating motor is located at the bottom of the rotating plate. A drive screw is fixedly mounted on the output end of the second rotating motor. The drive screw rotatably passes through the interior of the lifting seat. A drive block is threadedly connected to the external part of the drive screw. Two sliding rods are vertically mounted inside the lifting seat and are symmetrically arranged on both sides of the drive screw. The two ends of the drive block are slidably connected to the two sliding rods respectively. The front end of the drive block slides out of the sliding opening, and a second support plate is fixedly mounted on the front end of the drive block. The bottom of the second support plate is fixedly connected to the upper surface of another insulating sleeve.

[0015] The present invention has the following beneficial effects:

[0016] The present invention provides a plurality of strip-shaped grooves spaced apart on the insulating sleeve base, and the strip-shaped grooves of two insulating sleeve bases are staggered. The arc-shaped bending part of the insulating sleeve base simultaneously squeezes the two sides of the heat shrink sleeve, so that the heat shrink sleeve can better encapsulate the busbar.

[0017] This invention also incorporates a temperature sensing component and an electronic control component. Through their cooperation, on the one hand, it enables the heat shrink sleeve and the insulating base to move freely without slipping when connected by mounting parts and connectors. On the other hand, it automatically detects and assists in removing the insulating base from the heat shrink sleeve during heat shrinking, thus avoiding problems such as heat shrink sleeve damage caused by excessive heat shrinking time. It also avoids the inaccuracy of manual judgment and the errors caused by different heating times at different ambient temperatures. Attached Figure Description

[0018] Figure 1 This is a side view of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the insulating sleeve and heat shrink sleeve structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the insertion of the connector and mounting component of the present invention;

[0021] Figure 4 This is a partial half-sectional view of the insulating sleeve and heat shrink sleeve of the present invention from the side.

[0022] Figure 5 This is a schematic diagram of the internal structure of the cavity in this invention;

[0023] Figure 6 This is a schematic diagram of the execution components and lifting mechanism of the present invention.

[0024] The reference numerals in the figure are as follows:

[0025] 1. Insulated operating rod; 2. Encapsulation sleeve assembly; 3. Compacting assembly; 4. Actuating assembly; 5. Bimetallic strip thermostat; 6. First rotating motor; 7. Lifting seat; 21. Heat shrink sleeve; 22. Mounting component; 23. Limiting block; 24. Magnetic block; 25. Electromagnet; 26. Cavity; 261. Fixed seat; 262. Copper sheet button; 263. Spring; 264. Base; 31. Insulating sleeve seat; 32. Connecting component; 33. Heating strip; 34. Strip groove; 41. First support plate; 42. Rotating plate; 71. Second rotating motor; 72. Drive screw; 73. Drive block; 74. Slide rod; 75. Second support plate. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0027] Please see Figures 1 to 6 The invention provides a technical solution:

[0028] An electric tool for encapsulating the live insulation of exposed parts of a busbar includes an insulating operating rod 1, an encapsulation sleeve assembly 2, a compaction assembly 3, and an actuation assembly 4. The actuation assembly 4 is disposed at the end of the insulating operating rod 1, and the compaction assembly 3 is disposed on the actuation assembly 4. The encapsulation sleeve assembly 2 includes a heat-shrink sleeve 21 and a mounting member 22 disposed on the heat-shrink sleeve 21. The compaction assembly 3 includes two insulating sleeve seats 31 fixed on the actuation assembly 4, and the two insulating sleeve seats 31 are provided with connectors 32 for insertion into the mounting member 22. A heating strip 33 is also provided on the insulating sleeve base 31. The heat shrink sleeve 21 is disposed between the two insulating sleeve bases 31. The heat shrink sleeve 21 is pressed onto the busbar by the two insulating sleeve bases 31 pressing against each other and completing the encapsulation. The heating strip 33 heats the heat shrink sleeve to a certain extent and encapsulates the busbar. The arrangement between the mounting part 22 and the connecting part 32 can not only achieve quick insertion, but also prevent slippage caused by the operator holding the device at an angle. It also has the function of quick disassembly.

[0029] The heat shrink sleeve 21 is elliptical, and the connection on one side of the elliptical heat shrink sleeve 21 is disconnected. There are two mounting parts 22, which are respectively installed on the upper and lower outer surfaces of the heat shrink sleeve 21. The two mounting parts 22 are equipped with temperature sensing components. Through the temperature sensing components, the connection between the mounting parts 22 and the connecting parts 32 can be automatically disconnected after the heating strip 33 is heated to a certain temperature, and the compaction component 3 can be quickly removed to avoid damage to the heat shrink sleeve due to excessive heating. As is known from the prior art, the optimal heat shrinking temperature of the heat shrink sleeve is not constant, but is determined by a combination of its material, thickness and required shrinkage ratio. Typically, the heat shrinking temperature range is between 70℃ and 200℃. The heating time of the heat shrink sleeve is usually between a few seconds and tens of seconds, and the specific time depends on the thickness and material of the film. Therefore, if the time is judged manually or by using a conventional timer switch, the time required to heat to the specified temperature will be different due to the influence of external temperature such as temperature difference. Therefore, there will be some error compared to the judgment structure used in this solution.

[0030] Preferably, the two ends of the insulating sleeve 31 are arc-shaped and bent towards the connector 32. Several strip grooves 34 are spaced apart on the arc-shaped bend of the insulating sleeve 31. The strip grooves 34 of the arc-shaped bends of the two insulating sleeves 31 are staggered. The connector 32 is in the shape of a "U". During the mutual compression of the two insulating sleeves 31 with intersecting strip grooves 34, they will continue to travel a compression distance along the strip grooves 34. At the same time, the setting of the bending part can also help to compress the side wall of the heat shrink sleeve 21. In conventional prior art, the compression of the heat shrink sleeve 21 is generally only applied to the upper and lower surfaces of the heat shrink sleeve 21. However, with this setting, the compression can be applied to the upper, lower, and sides, a total of four directions, which can more tightly fit the busbar.

[0031] The mounting part 22 has an L-shaped cross section. The side wall of the mounting part 22 is rotatably connected to the limiting block 23 by a torsion spring. The end of the limiting block 23 is provided with a magnetic block 24. The upper and lower outer surfaces of the heat shrink sleeve 21 are provided with electromagnets 25. The electromagnets 25 generate electromagnetic fields through the electronic control component. The electromagnets 25 and the magnetic block 24 are matched. The connector 32 is inserted into the mounting part 22 and is prevented from sliding out by the limiting block 23.

[0032] Specifically, the mounting component 22 has a cavity 26 inside, and a mounting base 261 is provided on the top of the cavity 26. The electrical control assembly includes two wires and a copper plate button 262 located inside the cavity 26. One end of the copper plate button 262 is fixedly mounted on the bottom of the mounting base 261, and the other end of the copper plate button 262 is a movable end. A spring 263 is installed between the top of the movable end of the copper plate button 262 and the surface of the cavity 26. A base 264 is also fixedly mounted on the bottom of the cavity 26. Two fixing points are installed on the top of the base 264, and the copper plate button is fixed through the two fixing points. When not pressed, 262 contacts the copper plate button 262 to form a closed circuit; one end of the wire is connected to the positive terminal of the dry cell battery, and the other end of the wire is connected to a fixed point on the base 264. Another fixed point on the base 264 is connected to one end of the coil of the electromagnet 25, and the other end of the coil of the electromagnet 25 is connected to the negative terminal of the dry cell battery. The temperature sensing component includes a bimetallic thermostat 5. After the heating strip 33 heats up, the bimetallic thermostat 5 bends toward the heating strip 33 and causes the movable end of the copper plate button 262 to lift up and separate from the two fixed points to form an open circuit.

[0033] In the initial state, the internal circuit is controlled by an external switch structure, meaning there is no magnetism between the electromagnet 25 and the magnetic block 24. This allows the connector 32 to slide smoothly into and be inserted into the mounting component 22. Then, the circuit is activated by the external switch. At this time, the electromagnet 25 generates magnetism, and the electromagnet 25 and the magnetic block 24 attract each other. The connector 32 is then restricted by the limiting block 23 and will not slide out of the mounting component 22. Simultaneously, the copper plate button 262 is not bent or squeezed by the bimetallic thermostat 5, meaning the copper plate button 262 is not pressed. The copper plate button 262 and the two fixed... With fixed-point contact and circuit connection, current flows through the coil of electromagnet 25, generating a magnetic field that attracts the armature downwards. When preparing for heating and encapsulation, as the heating strip 33 rises to a certain temperature, the bimetallic thermostat 5 will bend towards the heating strip 33. At this time, the bent bimetallic thermostat 5 presses the copper button 262, causing the copper button 262 to separate from the two fixed points on the base 264, breaking the circuit. Electromagnet 25 loses its magnetism, and the armature springs upwards. At this time, the limiting block 23 no longer restricts the connector 32, and the connector 32 can be slid out from inside the mounting part 22 to close the heating strip 33.

[0034] The execution component 4 includes a first support plate 41 disposed at the upper end of the insulating operating rod 1. The upper surface of the first support plate 41 is fixedly connected to the lower surface of one of the insulating sleeves 31. The rear end of the first support plate 41 extends beyond the insulating sleeve 31, and a notch is provided on the part of the first support plate 41 that extends beyond the insulating sleeve 31. A first rotating motor 6 is disposed on the side wall of the first support plate 41. A rotating shaft is fixedly disposed at the output end of the first rotating motor 6. The rotating shaft rotates through the first support plate 41 and a rotating plate 42 is fixedly installed on the part of the rotating shaft located at the notch. A lifting mechanism is disposed on the top of the rotating plate 42. The lifting mechanism is used to control the two insulating sleeves 31 to press against each other.

[0035] The lifting mechanism includes a lifting seat 7 disposed on the top of the rotating plate 42. The lifting seat 7 has a hollow internal structure, and a sliding opening is vertically disposed on the side of the lifting seat 7 facing the insulating sleeve 31. The sliding opening communicates with the interior of the lifting seat 7. A second rotating motor 71 is disposed at the bottom of the rotating plate 42. A drive screw 72 is fixedly disposed at the output end of the second rotating motor 71. The drive screw 72 rotates through the interior of the lifting seat 7. A drive block 73 is threadedly connected to the outside of the drive screw 72. Two slide rods 74 are vertically disposed inside the lifting seat 7. The two slide rods 74 are symmetrically disposed on both sides of the drive screw 72. The two ends of the drive block 73 are slidably connected to the two slide rods 74 respectively. The front end of the drive block 73 slides out of the sliding opening, and a second support plate 75 is fixedly disposed at the front end of the drive block 73. The bottom of the second support plate 75 is fixedly connected to the upper surface of the other insulating sleeve 31.

[0036] Specifically, when the first rotating motor 6 is started, the first rotating motor 6 can drive the rotating plate 42 to rotate. Since the bottom of the second support plate 75 is fixedly connected to the upper surface of another insulating sleeve 31, the second support plate 75 will rotate and drive the insulating sleeve 31 to rotate. Since the insulating sleeve 31 is connected to the upper end of the heat shrink sleeve 21, the rotating insulating sleeve 31 will open a hole at the disconnected connection of the heat shrink sleeve 21. Through the opened hole, one end of the busbar can be smoothly passed through until the busbar is wrapped inside the heat shrink sleeve 21. After resetting, the process of placing the busbar inside the heat shrink sleeve 21 is completed.

[0037] When the second rotating motor 71 is driven, it will cause the second support plate 75 to press towards the first support plate 41, thus completing the process of compressing the heat shrink sleeve 21 onto the busbar.

[0038] As a preferred embodiment, the second support plate 75, the first support plate 41, and the insulating sleeve 31 of the present invention are all made of flexible metal shells, and the flexible metal shells are provided with electrorheological fluid. Under normal conditions, the electrorheological fluid is a suspension that can undergo a liquid-to-solid transformation under the action of an electric field. Specifically, when the busbar needs to be encapsulated at a bent part, the deformability of the flexible metal shell changes the overall appearance to fit the bent busbar. Then, the excitation structure drives the internal electrorheological fluid to undergo a liquid-to-solid transformation, and the extrusion work can continue to be completed.

[0039] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An electric tool for encapsulating the live insulation of exposed parts of a busbar, comprising an insulated operating rod (1), characterized in that: It also includes an encapsulation sleeve assembly (2), a compaction assembly (3), and an execution assembly (4); the execution assembly (4) is disposed at the end of the insulating operating rod (1), and the compaction assembly (3) is disposed on the execution assembly (4); the encapsulation sleeve assembly (2) includes a heat shrink sleeve (21) and a mounting piece (22) disposed on the heat shrink sleeve (21); the compaction assembly (3) includes two insulating sleeve seats (31) fixed on the execution assembly (4); the two insulating sleeve seats (31) are provided with connectors (32) for insertion into the mounting piece (22); and the two insulating sleeve seats (31) are also provided with heating strips (33); the heat shrink sleeve (21) is disposed between the two insulating sleeve seats (31); and the heat shrink sleeve (21) is compacted on the busbar and the encapsulation is completed by the two insulating sleeve seats (31) pressing against each other; The heat shrink sleeve (21) is elliptical, and the connection on one side of the elliptical heat shrink sleeve (21) is disconnected; there are two mounting parts (22), which are respectively installed on the upper outer surface and the lower outer surface of the heat shrink sleeve (21); temperature sensing components are provided inside the two mounting parts (22); The mounting component (22) has an L-shaped cross-section. The sidewall of the mounting component (22) is rotatably connected to a limiting block (23) via a torsion spring. A magnetic block (24) is provided at the end of the limiting block (23). Electromagnets (25) are provided on both the upper and lower outer surfaces of the heat shrink sleeve (21). The electromagnets (25) generate electromagnetic fields through an electronic control component. The electromagnets (25) and the magnetic blocks (24) are matched. The connector (32) is inserted into the mounting component (22) and is prevented from sliding out by the limiting block (23). The mounting component (22) has a cavity (26) inside, and a fixing seat (261) is provided on the top of the cavity (26). The electronic control component includes two wires and a copper plate button (262) located inside the cavity (26). One end of the copper plate button (262) is fixedly disposed at the bottom of the fixing seat (261), and the other end of the copper plate button (262) is a movable end. A spring (263) is installed between the top of the movable end of the copper plate button (262) and the surface of the cavity (26). The bottom of the cavity (26) A base (264) is also fixedly provided. Two fixing points are installed on the top of the base (264), and the two fixing points form a closed circuit with the copper plate button (262) when the copper plate button (262) is not pressed. One end of the wire is connected to the positive terminal of the dry cell battery, and the other end of the wire is connected to one fixing point on the base (264). The other fixing point on the base (264) is connected to one end of the coil of the electromagnet (25), and the other end of the coil of the electromagnet (25) is connected to the negative terminal of the dry cell battery. The temperature-sensitive component includes a bimetal thermostat (5). After the heating strip (33) is heated, the bimetal thermostat (5) bends towards the heating strip (33), causing the movable end of the copper sheet button (262) to翘起 and separate from the two fixed points, forming an open circuit.

2. The power tool for live insulation encapsulation of exposed busbar portions as described in claim 1, characterized in that: Both ends of the insulating sleeve base (31) are arc-shaped and are bent towards the connecting member (32). A number of strip-shaped grooves (34) are arranged at intervals on the arc-shaped bending part of the insulating sleeve base (31). The strip-shaped grooves (34) on the arc-shaped bending parts of the two insulating sleeve bases (31) are arranged staggeredly.

3. The power tool for live insulation encapsulation of exposed busbar portions as described in claim 1, characterized in that: The connecting member (32) is in a "mouth" shape.

4. The power tool for live insulation encapsulation of exposed busbar portions as described in claim 1, characterized in that: The actuating component (4) includes a first support plate (41) arranged at the upper end of the end of the insulating operating rod (1). The upper surface of the first support plate (41) is fixedly connected to the lower surface of one of the insulating sleeve bases (31). The rear end of the first support plate (41) extends beyond the insulating sleeve base (31), and a notch is formed on the part of the first support plate (41) that extends beyond the insulating sleeve base (31). A first rotating motor (6) is arranged on the side wall of the first support plate (41). The output end of the first rotating motor (6) is fixedly provided with a rotating shaft. The rotating shaft rotates through the first support plate (41), and a rotating plate (42) is fixedly installed on the part of the rotating shaft located in the notch. A lifting mechanism is arranged at the top of the rotating plate (42). The lifting mechanism is used to control the mutual extrusion of the two insulating sleeve bases (31).

5. The power tool for live insulation encapsulation of exposed busbar portions as described in claim 4, characterized in that: The lifting mechanism includes a lifting seat (7) arranged at the top of the rotating plate (42). The inside of the lifting seat (7) is a hollow structure, and a sliding port is vertically arranged on the side of the lifting seat (7) facing the insulating sleeve base (31). The sliding port is communicated with the inside of the lifting seat (7). A second rotating motor (71) is arranged at the bottom of the rotating plate (42). The output end of the second rotating motor (71) is fixedly provided with a driving screw rod (72). The driving screw rod (72) rotates through the inside of the lifting seat (7). An external thread of the driving screw rod (72) is threadedly connected with a driving block (73). Two sliding rods (74) are vertically arranged inside the lifting seat (7). The two sliding rods (74) are symmetrically arranged on both sides of the driving screw rod (72). Both ends of the driving block (73) are respectively slidably connected with the two sliding rods (74). The front end of the driving block (73) slides out of the sliding port, and a second support plate (75) is fixedly provided at the front end of the driving block (73). The bottom of the second support plate (75) is fixedly connected to the upper surface of the other insulating sleeve base (31).

6. The power tool for live insulation encapsulation of exposed busbar portions as described in claim 1, characterized in that: The insulating operating rod (1) is of a telescopic rod structure.

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