Electrified insulation packaging electric tool for exposed part of busbar

Abstract

The invention relates to a live insulation encapsulation electric tool for an exposed part of a busbar, which comprises an insulation operating rod, an encapsulation sleeve assembly, a compaction assembly and an execution assembly, the execution assembly is arranged at the end part of the insulating operation rod, and the compaction assembly is arranged on the execution assembly; the wrapping sleeve assembly comprises a thermal shrinkable sleeve and an installation piece arranged on the thermal shrinkable sleeve, the compaction assembly comprises two insulation sleeve seats fixed on the execution assembly, the two insulation sleeve seats are provided with connecting pieces used for being connected to the installation piece in an inserted mode, and the two insulation sleeve seats are further provided with heating strips. The heat shrinkable sleeve is arranged between the two insulating sleeve seats, and the two insulating sleeve seats extrude oppositely to enable the heat shrinkable sleeve to be compacted on the busbar and complete encapsulation, so that the use stability of the device can be kept, and the problem that the heating time of the heat shrinkable sleeve is too long can be avoided.

Description

Technical Field

[0001] The invention relates to an electric tool for live insulation encapsulation of exposed parts of a busbar, belonging to the technical field of insulation encapsulation. Background Art

[0002] In order to ensure safety and improve reliability in the power system, it is necessary to insulate the key components of the substation. According to the requirements of Article 2.1.24 of the Countermeasures of the State Grid Corporation of China, the 6-35kV medium (low) voltage side leads, outdoor busbars (excluding overhead busbars) and terminal blocks of the main transformers of 220kV and below should be insulated; and for 500 (330) kV transformers, it is also recommended to adopt insulation measures for the leads from the 35kV bushing to the busbar; in addition, the 10kV overhead lines within 2km of the substation outlet should use insulated conductors.

[0003] However, traditional insulation encapsulation methods have significant limitations and safety hazards. For example, Chinese patent CN118888320A discloses a live insulation encapsulation device for the low-voltage side of a main transformer, which is inserted into a penetration block by moving an entry block to keep the encapsulation sleeve stable. During use, when the device is shaken, the entry block moves in the opposite direction and can slide out of the penetration block, that is, the stability of the device is poor. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides an electric tool for insulating and encapsulating the exposed part of a busbar, which can maintain the stability of the device while avoiding the problem of excessive heating time of the heat shrink sleeve.

[0005] The technical solution of the present invention is as follows:

[0006] An electric tool for live insulation encapsulation of exposed parts of a busbar, comprising an insulating operating rod, an encapsulation sleeve assembly, a compaction assembly and an actuator assembly; the actuator assembly is arranged at the end of the insulating operating rod, and the compaction assembly is arranged on the actuator assembly; the encapsulation sleeve assembly comprises a heat shrink sleeve and a mounting piece arranged on the heat shrink sleeve, the compaction assembly comprises two insulating sleeve seats fixed on the actuator assembly, the two insulating sleeve seats are provided with connectors for plugging into the mounting piece, and the two insulating sleeve seats are also provided with heating strips, the heat shrink sleeve is arranged between the two insulating sleeve seats, and the heat shrink sleeve is compacted on the busbar and the encapsulation is completed by squeezing the two insulating sleeve seats towards each other.

[0007] Among them, the heat shrink sleeve is elliptical, and the connection on one side of the elliptical heat shrink sleeve is disconnected; there are two mounting parts, and the two mounting parts are respectively installed on the upper outer surface and the lower outer surface of the heat shrink sleeve; temperature sensing components are arranged inside the two mounting parts.

[0008] The two ends of the insulating sleeve are arc-shaped and bent toward the connector, a plurality of strip grooves are arranged at intervals on the arc-shaped bending portion of the insulating sleeve, and the plurality of strip grooves on the arc-shaped bending portions of the two insulating sleeves are arranged alternately.

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

[0010] Among them, the cross-section of the mounting piece is L-shaped, the side wall of the mounting piece is rotatably connected to the limit block through a torsion spring, a magnetic block is arranged at the end of the limit block, the upper outer surface and the lower outer surface of the heat shrink sleeve are both provided with electromagnets, the electromagnets generate electromagnetics through the electronic control component, and the electromagnets and the magnetic blocks match; the connecting piece is inserted into the interior of the mounting piece and is prevented from slipping out by the limit block.

[0011] Among them, a cavity is arranged inside the mounting part, a fixing seat is arranged on 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 fixing seat, the other end of the copper sheet button is a movable end, and 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 arranged on the top of the base, and the two fixing points contact the copper sheet button to form a closed loop when the copper sheet button is not pressed; one end of the wire is connected to the positive pole of the dry battery, the other end of the wire is connected to a fixed point on the base, the other fixed 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 bimetallic thermostat. When the heating strip is heated up, the bimetallic thermostat bends toward the heating strip and causes the movable end of the copper button to tilt and separate from the two fixed points to form a short circuit.

[0013] In which, the actuator 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 sleeves, the rear end of the first support plate exceeds the insulating sleeve, and a notch is provided on the portion of the first support plate exceeding the insulating sleeve, a first rotating motor is arranged on the side wall of the first support plate, a rotating shaft is fixedly arranged on the output end of the first rotating motor, the rotating shaft rotates through the first support plate and a rotating plate is fixedly installed on the portion where the rotating shaft is located at the notch, a lifting mechanism is arranged on the top of the rotating plate, and the lifting mechanism is used to control the two insulating sleeves to squeeze each other.

[0014] The lifting mechanism comprises a lifting seat arranged at the top of the rotating plate, the lifting seat has a hollow structure inside, and a sliding opening is vertically arranged on the lifting seat facing the insulating sleeve side, the sliding opening is connected to the inside of the lifting seat, a second rotating motor is arranged at the bottom of the rotating plate, a driving screw is fixedly arranged at the output end of the second rotating motor, the driving screw is rotatably passed through the lifting seat, the external thread of the driving screw is connected with a driving block, two sliding rods are vertically arranged inside the lifting seat, the two sliding rods are symmetrically arranged on both sides of the driving screw, and the two ends of the driving block are respectively slidably connected to the two sliding rods; the front end of the driving block slides out of the sliding opening, and the front end of the driving block is fixedly arranged with a second supporting plate, and the bottom of the second supporting 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 arranges a plurality of strip grooves on the insulating sleeve at intervals, and the strip grooves of the two insulating sleeves are arranged in a staggered manner, and the arc-shaped bending portion of the insulating sleeve is used to simultaneously squeeze the two sides of the heat shrink sleeve, so that the heat shrink sleeve can be better encapsulated on the busbar;

[0017] The present invention also provides a temperature sensing component and an electric control component. Through the cooperation of the two, on the one hand, when the heat shrink sleeve and the insulating pressure seat are connected by the mounting part and the connecting part, they can be shaken arbitrarily without slipping. On the other hand, when the heat shrink sleeve is heat shrunk, automatic detection can be performed and the insulating pressure seat can be assisted to be removed from the heat shrink sleeve, which can avoid problems such as damage to the heat shrink sleeve due to excessive shrinkage time. At the same time, it can also avoid the inaccuracy of manual judgment and the error caused by different heating times to the required temperature under different ambient temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0020] Figure 3 This is a schematic diagram of the connection between the connecting piece and the mounting piece of the present invention;

[0021] Figure 4 It is a partial half-section side view of the insulating sleeve and the heat shrink sleeve of the present invention;

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

[0023] Figure 6 It is a schematic diagram of the actuator and lifting mechanism of the present invention.

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

[0025] 1. Insulating operating rod; 2. Encapsulating sleeve assembly; 3. Compacting assembly; 4. Actuating assembly; 5. Bimetallic temperature controller; 6. First rotating motor; 7. Lifting seat; 21. Heat shrink sleeve; 22. Mounting piece; 23. Limit block; 24. Magnetic block; 25. Electromagnet; 26. Cavity; 261. Fixing seat; 262. Copper sheet button; 263. Spring; 264. Base; 31. Insulating sleeve seat; 32. Connecting piece; 33. Heating strip; 34. Strip groove; 41. First support plate; 42. Rotating plate; 71. Second rotating motor; 72. Driving screw; 73. Driving block; 74. Sliding rod; 75. Second support plate. DETAILED DESCRIPTION

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

[0027] See also Figures 1 to 6 , the invention provides a technical solution:

[0028] A live insulation encapsulation electric tool for busbar exposed part, comprising an insulating operating rod 1, an encapsulation sleeve assembly 2, a compaction assembly 3 and an actuator assembly 4; the actuator assembly 4 is arranged at the end of the insulating operating rod 1, and the compaction assembly 3 is arranged on the actuator assembly 4; the encapsulation sleeve assembly 2 comprises a heat shrink sleeve 21 and a mounting member 22 arranged on the heat shrink sleeve 21, the compaction assembly 3 comprises two insulating sleeve seats 31 fixed on the actuator assembly 4, the two insulating sleeve seats 31 are provided with connectors 32 for plugging into the mounting member 22, and the two A heating strip 33 is also provided on the insulating sleeve seat 31, and the heat shrink sleeve 21 is provided between the two insulating sleeve seats 31. The heat shrink sleeve 21 is pressed against the busbar and the encapsulation is completed by the two insulating sleeve seats 31 being pressed toward each other; the heat shrink sleeve is heated by the heating strip 33 to shrink to a certain extent and encapsulate the busbar; the setting between the mounting member 22 and the connecting member 32 can not only play the role of quick plug-in, but also avoid slipping due to the operator holding the device tilted when using the device, and 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, and the two mounting parts 22 are respectively installed on the upper outer surface and the lower outer surface of the heat shrink sleeve 21; temperature sensing components are arranged inside the two mounting parts 22; through the temperature sensing component, it is possible to automatically disconnect the connection between the mounting part 22 and the connecting part 32 after the heating strip 33 is heated to a certain temperature, and quickly remove the compaction component 3 to avoid damage to the heat shrink sleeve caused by excessive heating. It can be known from the prior art that the optimal heat shrink temperature of the heat shrink sleeve is not fixed, but is comprehensively considered based on its material, thickness and required shrinkage ratio. Usually, the heat shrink temperature ranges from 70°C to 200°C; and 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 a simple manual judgment is used for time judgment or a conventional timing circuit breaker is used, the time required to heat to a specified temperature is different due to the influence of external temperature such as temperature difference. Therefore, there will be some errors relative to the judgment structure adopted in this scheme.

[0030] Preferably, both ends of the insulating sleeve 31 are arc-shaped and bent toward the connector 32. A plurality of strip grooves 34 are arranged at intervals on the arc-shaped bending portion of the insulating sleeve 31. The plurality of strip grooves 34 of the arc-shaped bending portions of the two insulating sleeves 31 are arranged alternately, and the connector 32 is in a "mouth" shape; during the mutual extrusion of the two insulating sleeves 31 with the strip grooves 34 arranged crosswise, the extrusion distance will continue along the strip grooves 34. At the same time, the arrangement of the bent portion can also help to extrude the side wall portion of the heat shrink sleeve 21. In the conventional prior art, the extrusion of the heat shrink sleeve 21 generally only acts on the upper and lower surfaces of the heat shrink sleeve 21. However, through this arrangement, the present application can extrude the upper, lower and both sides, a total of four directions; it can fit the busbar more closely;

[0031] The cross-section of the mounting piece 22 is L-shaped, and the side wall of the mounting piece 22 is rotatably connected to the limit block 23 through a torsion spring. A magnetic block 24 is provided at the end of the limit block 23. The upper and lower outer surfaces of the heat shrink sleeve 21 are both provided with electromagnets 25. The electromagnets 25 generate electromagnetic energy through the electronic control component, and the electromagnets 25 and the magnetic blocks 24 match each other. The connecting piece 32 is inserted into the interior of the mounting piece 22 and is prevented from slipping out by the limit block 23.

[0032] Specifically, a cavity 26 is provided inside the mounting member 22, a fixing seat 261 is provided on the top of the cavity 26, the electric control component includes two wires and a copper sheet key 262 located inside the cavity 26, one end of the copper sheet key 262 is fixedly provided at the bottom of the fixing seat 261, the other end of the copper sheet key 262 is a movable end, and a spring 263 is installed between the top of the movable end of the copper sheet key 262 and the surface of the cavity 26; a base 264 is also fixedly provided at the bottom of the cavity 26, two fixing points are installed on the top of the base 264, and the copper sheet key 262 is fixedly provided at the bottom of the cavity 26 When 262 is not pressed, it contacts the copper button 262 to form a closed loop; 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 a fixed point on the base 264, and the other 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 pole of the dry battery. The temperature sensing component includes a bimetallic thermostat 5. After the heating strip 33 is heated, the bimetallic thermostat 5 bends toward the heating strip 33 and causes the active end of the copper button 262 to tilt and separate from the two fixed points to form a short circuit.

[0033] In the initial state, the internal overall circuit is controlled by the external switch structure, that is, no magnetism is generated between the electromagnet 25 and the magnetic block 24, and the connector 32 can be smoothly slid into and inserted into the interior of the mounting member 22. Then, the circuit is started 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 will be restricted by the limit block 23 and will not slide out of the mounting member 22. At this time, the copper button 262 is not bent or squeezed by the bimetallic thermostat 5, that is, the copper button 262 is not pressed, and the copper button 262 and the two fixed buttons on the base 264 are not pressed. Fixed-point contact, the circuit is connected, and the current passes through the coil of the electromagnet 25, generating a magnetic field to attract the armature downward; when preparing to heat and encapsulate, since the heating strip 33 rises to a certain temperature, the bimetallic thermostat 5 will bend toward the heating strip 33. At this time, the bent bimetallic thermostat 5 squeezes the copper button 262, so that the copper button 262 is separated from the two fixed points on the base 264, the circuit is disconnected, the electromagnet 25 loses its magnetism, and the armature bounces upward; at this time, the limit block 23 no longer restricts the connecting member 32, and the connecting member 32 can be slid out of the inside of the mounting member 22 and the heating strip 33 is turned off;

[0034] The actuator 4 includes a first support plate 41 disposed 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 sleeves 31, the rear end of the first support plate 41 exceeds the insulating sleeve 31, and a notch is provided on the portion of the first support plate 41 exceeding 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 portion of the rotating shaft located at the notch, a lifting mechanism is disposed on the top of the rotating plate 42, and the lifting mechanism is used to control the two insulating sleeves 31 to squeeze each other;

[0035] The lifting mechanism includes a lifting seat 7 arranged on the top of the rotating plate 42. The interior of the lifting seat 7 is a hollow structure, and a sliding opening is vertically arranged on the lifting seat 7 facing the side of the insulating sleeve 31, and the sliding opening is connected to the interior of the lifting seat 7. A second rotating motor 71 is arranged at the bottom of the rotating plate 42, and a driving screw 72 is fixedly arranged at the output end of the second rotating motor 71. The driving screw 72 is rotatably passed through the interior of the lifting seat 7, and the external thread of the driving screw 72 is connected to a driving block 73. Two sliding rods 74 are vertically arranged inside the lifting seat 7, and the two sliding rods 74 are symmetrically arranged on both sides of the driving screw 72. The two ends of the driving block 73 are respectively slidably connected to the two sliding rods 74; the front end of the driving block 73 slides out of the sliding opening, and a second supporting plate 75 is fixedly arranged at the front end of the driving block 73, and the bottom of the second supporting plate 75 is fixedly connected to the upper surface of another 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 supporting plate 75 is fixedly connected to the upper surface of another insulating sleeve 31, the second supporting 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 cause the heat shrink sleeve 21 to disconnect and open a hole at the connection point where the setting is disconnected. 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, and then reset again, the operation process of the busbar being located inside the heat shrink sleeve 21 can be completed.

[0037] When the second rotating motor 71 is driven, the second supporting plate 75 will be driven to be pressed toward the first supporting plate 41, thus completing the operation process of compressing the heat shrink sleeve 21 onto the busbar;

[0038] As a preference, the second support plate 75, the first support plate 41 and the insulating sleeve 31 of the present invention are all made of a flexible metal shell, and an electrorheological fluid is arranged inside the flexible metal shell. The electrorheological fluid is a suspension under normal conditions, and it can transform from liquid to solid under the action of an electric field; specifically, when the busbar needs to be encapsulated at a bent part, the flexible metal shell is deformable to change the overall appearance to fit the bent busbar, and then the internal electrorheological fluid is driven by the excitation structure to form a liquid-to-solid transformation, and the extrusion work can continue to be completed.

[0039] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An electric tool for insulating and encapsulating the exposed part of a busbar, comprising an insulating operating rod (1), characterized in that: It also includes an encapsulation component (2), a compaction component (3) and an execution component (4); the execution component (4) is arranged at the end of the insulating operating rod (1), and the compaction component (3) is arranged on the execution component (4); the encapsulation component (2) includes a heat shrinkable sleeve (21) and a mounting member (22) arranged on the heat shrinkable sleeve (21), the compaction component (3) includes two insulating sleeve seats (31) fixed on the execution component (4), a connecting member (32) for inserting into the mounting member (22) is arranged on the two insulating sleeve seats (31), and a heating strip (33) is also arranged on the two insulating sleeve seats (31), the heat shrinkable sleeve (21) is arranged between the two insulating sleeve seats (31), and the heat shrinkable sleeve (21) is compacted on the busbar and the encapsulation is completed by the opposite extrusion of the two insulating sleeve seats (31).

2. An electric tool for insulating and encapsulating exposed parts of a busbar as claimed in claim 1, characterized in that: The heat shrinkable sleeve (21) is oval, and one side connection of the oval heat shrinkable sleeve (21) is arranged in a disconnected manner; there are two mounting members (22), and the two mounting members (22) are respectively installed on the outer surfaces of the upper end and the lower end of the heat shrinkable sleeve (21); a temperature sensing component is arranged inside the two mounting members (22).

3. An electric tool for insulating and encapsulating exposed busbar parts as claimed in claim 1, characterized in that: Both ends of the insulating sleeve seat (31) are arc-shaped and bent towards the connecting member (32), and a plurality of strip-shaped grooves (34) are arranged at intervals on the arc-shaped bent part of the insulating sleeve seat (31), and the strip-shaped grooves (34) on the arc-shaped bent parts of the two insulating sleeve seats (31) are arranged in an interleaved manner.

4. The electric tool for insulating and encapsulating the exposed part of a busbar as claimed in claim 1, characterized in that: The connecting member (32) is in a "mouth" shape.

5. The electric tool for insulating and encapsulating the exposed part of a busbar as claimed in claim 2, characterized in that: The cross section of the mounting member (22) is L-shaped, a limiting block (23) is rotatably connected to the side wall of the mounting member (22) through a torsion spring, a magnetic block (24) is arranged at the end of the limiting block (23), electromagnets (25) are arranged on the outer surfaces of the upper end and the lower end of the heat shrinkable sleeve (21), the electromagnets (25) generate electromagnetic force through an electric control component, and the electromagnets (25) and the magnetic blocks (24) are matched; the connecting member (32) is inserted into the mounting member (22) and the limiting block (23) prevents the connecting member (32) from sliding out.

6. An electric tool for insulating and encapsulating exposed busbar parts as claimed in claim 5, characterized in that: A cavity (26) is arranged inside the mounting member (22), a fixing seat (261) is arranged on the top of the cavity (26), the electric control component comprises two wires and a copper sheet key (262) located inside the cavity (26), one end of the copper sheet key (262) is fixedly arranged at the bottom of the fixing seat (261), the other end of the copper sheet key (262) is a movable end, and a spring (263) is arranged between the top of the movable end of the copper sheet key (262) and the surface of the cavity (26); the bottom of the cavity (26) A base (264) is also fixedly arranged, and two fixing points are installed on the top of the base (264). When the copper sheet key (262) is not pressed, the two fixing points contact the copper sheet key (262) to form a closed loop; 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 a fixed point on the base (264); the other 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 pole of the dry battery.

7. An electric tool for electrically insulating and encapsulating exposed parts of a busbar as claimed in claim 6, characterized in that: The temperature sensing component comprises a bimetallic thermostat (5); after the heating strip (33) is heated, the bimetallic thermostat (5) bends towards the heating strip (33) and causes the movable end of the copper sheet button (262) to tilt and separate from the two fixed points to form a circuit.

8. The electric tool for insulating and encapsulating the exposed part of a busbar as claimed in claim 1, characterized in that: The actuator assembly (4) comprises 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 sleeves (31), the rear end of the first support plate (41) exceeds the insulating sleeve (31), and a notch is provided on the portion of the first support plate (41) exceeding the insulating sleeve (31), a first rotating motor (6) is arranged on the side wall of the first support plate (41), a rotating shaft is fixedly arranged 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 portion where the rotating shaft is located at the notch, and a lifting mechanism is arranged on the top of the rotating plate (42), and the lifting mechanism is used to control the two insulating sleeves (31) to squeeze each other.

9. An electric tool for electrically insulating and encapsulating exposed parts of a busbar as claimed in claim 8, characterized in that: The lifting mechanism comprises a lifting seat (7) arranged on the top of the rotating plate (42), the interior of the lifting seat (7) is a hollow structure, and a sliding opening is vertically arranged on the side of the lifting seat (7) facing the insulating sleeve (31), and the sliding opening is communicated with the interior of the lifting seat (7). A second rotating motor (71) is arranged at the bottom of the rotating plate (42), and a driving screw (72) is fixedly arranged at the output end of the second rotating motor (71), and the driving screw (72) is rotatably arranged inside the lifting seat (7). The driving screw (72) 2) is connected to a driving block (73) through an external thread, two sliding rods (74) are vertically arranged inside the lifting seat (7), and the two sliding rods (74) are symmetrically arranged on both sides of the driving screw (72), and the two ends of the driving block (73) are respectively slidably connected to the two sliding rods (74); the front end of the driving block (73) slides out of the sliding opening, and a second supporting plate (75) is fixedly arranged at the front end of the driving block (73), and the bottom of the second supporting plate (75) is fixedly connected to the upper surface of another insulating sleeve (31).

10. The electric tool for insulating and encapsulating the exposed part of a busbar as claimed in claim 1, characterized in that: The insulating operating rod (1) is a telescopic rod structure.

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