Heat preservation aluminum sheet winding drum machine

Abstract

The invention provides a thermal insulation aluminum sheet winding machine, and relates to the technical field of thermal insulation sheet binding, the thermal insulation aluminum sheet winding machine comprises a base, a lifting table is arranged on the base, a workbench is fixedly arranged on the top of the lifting table, a binding assembly and a discharging assembly are arranged on the workbench, the base facilitates the position movement of the thermal insulation aluminum sheet binding machine, and the lifting table is the prior art. The height of the workbench is adjusted through the lifting table, the workbench supports the edge rolling assembly and the discharging assembly, the edge rolling assembly is sleeved with a heat preservation aluminum sheet charging barrel, the discharging assembly rotates and continuously discharges heat preservation aluminum sheets, the edge rolling assembly conducts edge rolling on the heat preservation aluminum sheets with different thicknesses, and the strength and stability of the aluminum sheets are enhanced through edge rolling; round heat preservation skin needed when a round pipeline is installed for external heat preservation is rolled in advance, labor force is saved, the manufacturing time is shortened, meanwhile, the phenomena that burrs exist on the edge of the heat preservation aluminum skin and the heat preservation aluminum skin is irregular are avoided, and the installation attaching degree of the heat preservation aluminum skin and the heat preservation effect on the pipeline are improved.

Description

Technical Field

[0001] The invention relates to the technical field of thermal insulation leather hemming, in particular to a thermal insulation aluminum leather winding machine. Background Art

[0002] The pipeline insulation layer refers to the layer structure wrapped around the outside of the pipeline that can play a role in heat preservation and heat insulation. The pipeline insulation layer has the functions of reducing the heat loss of the medium, meeting the pressure and temperature required for production, improving working conditions and environmental hygiene, preventing pipeline corrosion, and extending its service life.

[0003] Compared with other materials, aluminum skin has many advantages. It has strong corrosion resistance and is not affected by factors such as humidity, acid and alkali. Secondly, it has a tight structure and high internal filling density, which can play a good role in thermal insulation. In addition, aluminum skin has high processing capacity, long service life, beautiful appearance and easy cleaning, so aluminum skin insulation layer has been widely used.

[0004] When installing external insulation on a circular pipe, the insulation skin needs to be rolled into a circle. Manual rolling has poor results and is time-consuming and labor-intensive. In addition, since the insulation aluminum material is relatively soft, the unrolled edges will have burrs and unevenness, which will affect the installation of the aluminum skin and the insulation effect of the pipe. Therefore, it is necessary to invent a machine to roll the pipe insulation aluminum skin. Summary of the invention

[0005] The invention provides a heat-insulating aluminum skin reel machine to solve the defects in the prior art.

[0006] The invention provides a heat-insulating aluminum sheet reel machine, comprising a base, a lifting platform is arranged on the base, a workbench is fixedly arranged on the top of the lifting platform, and a rolling assembly and a material discharge assembly are arranged on the workbench.

[0007] Preferably, the rolling assembly includes a limit seat and a motor 1, the two limit seats are fixedly arranged on the workbench, the motor 1 is arranged on the outside of the limit seats, a first roller and a second roller are rotatably arranged between the two limit seats, spur gears are respectively arranged at both ends of the first roller and the second roller, the spur gears at both ends of the first roller are meshed with the spur gears at the corresponding ends of the second roller, one end of the second roller is connected to the motor 1 through a transmission shaft, sliding grooves are opened in the two limit seats, a moving block is arranged in the sliding groove for sliding up and down, a screw is arranged on the top of the moving block, the screw is vertically inserted in the limit seat, the screw is threadedly connected to the limit seat, a third roller is rotatably arranged between the two moving blocks, spur gears are respectively arranged at both ends of the third roller, the spur gears at both ends of the third roller are meshed with the spur gears at the corresponding ends of the first roller.

[0008] Preferably, the discharge assembly includes a second motor, a reducer is provided at the output end of the second motor, a sleeve shaft is provided at one end of the reducer, and a fixing module is provided inside the sleeve shaft.

[0009] Preferably, the fixing module includes a second gas rod, and the second gas rod is fixedly arranged in the sleeve shaft, and a cone head is fixedly arranged on the output end of the second gas rod. A slot and a slide groove are symmetrically opened on the inner wall of the sleeve shaft with the cone head as the axis, and a card column is inserted in the slot, and a limiting column is fixed in the slide groove. Slide blocks are fixedly arranged at both ends of the card column, and the slide block is sleeved on the limiting column. A buffer spring is sleeved on the limiting column between the slide block and the inner wall of the second gas rod, and the end of the card column close to the cone head is an inclined surface and is in contact with the inclined surface of the cone head.

[0010] Preferably, it also includes a deviation correction component, which is arranged on the hemming component and is made of conductive material.

[0011] Preferably, the deviation correction and cleaning assembly includes a rotating rod, which is rotatably arranged in the two limit seats, and two arc frames 1 are fixedly arranged on the rotating rod, and a pressure cylinder is rotatably arranged on the arc frame 1, and an arc frame 2 is arranged on the end of the rotating rod extending out of the limit seat, and a gas rod 1 is arranged on the outer side of the limit seat, and the extended end of the gas rod 1 is hinged to one end of the arc frame 2, and a connecting rod 1 is fixedly arranged on the outer side of the arc frame 1, and a limit frame is fixedly arranged on the outer wall of the limit seat, and a linkage is vertically inserted in the limit frame. Rod, the top of the connecting rod is hinged with the connecting rod one, an arc frame three is rotatably arranged on the outer wall of the limiting seat, one end of the arc frame three is abutted with the bottom of the connecting rod, and a pressure cylinder is rotatably arranged on the other end of the arc frame three, a connecting rod two is arranged at the bottom of one end of the arc frame three, and the bottom end of the connecting rod two is hinged with an abutting rod, a sleeve of non-conductive material is arranged on the workbench, an electrostatic belt is connected between the bottom of the sleeve and the ground, a conductive spring is arranged at the bottom of the sleeve, and the bottom of the abutting rod is inserted in the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0014] Figure 2is a schematic cross-sectional structure diagram of a hemming assembly provided by an embodiment of the present invention;

[0015] Figure 3 is a schematic diagram of the cross-sectional structure of a discharge assembly provided in an embodiment of the present invention;

[0016] Figure 4 yes Figure 3 Schematic diagram of the structure at B in the middle;

[0017] Figure 5 yes Figure 1 The structural diagram at A in the middle;

[0018] Figure 6 is a schematic diagram of the structure of a correction component provided by an embodiment of the present invention;

[0019] Figure 7 yes Figure 6 Schematic diagram of the structure at C in the middle.

[0020] Reference numerals:

[0021] 1. Base; 2. Lifting platform; 4. Workbench; 5. Rolling assembly; 51. Limit seat; 52. Motor 1; 53. First roller; 531. Spur gear; 54. Second roller; 55. Transmission shaft; 56. Sliding groove; 57. Moving block; 58. Screw; 59. Third roller; 6. Discharging assembly; 61. Motor 2; 62. Speed ​​reducer; 63. Sleeve shaft; 64. Fixing module; 641. Gas rod 2; 642. Cone head; 643 , card slot; 644, slide slot; 645, card column; 646, limit column; 647, slider; 648, buffer spring; 7, deviation correction component; 71, rotating rod; 72, arc frame one; 73, pressure cylinder; 74, arc frame two; 75, gas rod one; 76, connecting rod one; 77, limit frame; 78, linkage rod; 79, arc frame three; 80, connecting rod two; 81, abutment rod; 82, sleeve; 83, conductive spring; 84, static belt. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] The present invention provides the following embodiments

[0025] Example 1

[0026] The embodiment of the present invention provides a heat-insulating aluminum sheet reel machine, such as Figure 1 As shown, it comprises: a base 1, a lifting platform 2 is arranged on the base 1, a workbench 4 is fixedly arranged on the top of the lifting platform 2, and a rolling assembly 5 and a material discharge assembly 6 are arranged on the workbench 4.

[0027] The working principle and beneficial effects of the above technical scheme are as follows: the base 1 facilitates the movement of the thermal insulation aluminum skin rolling machine, the lifting platform 2 is the existing technology, the lifting platform 2 adjusts the height of the workbench 4, the workbench 4 supports the rolling component 5 and the discharge component 6, the thermal insulation aluminum skin barrel is sleeved on the rolling component 5, the discharge component 6 rotates and continuously discharges the thermal insulation aluminum skin, the rolling component 5 rolls the thermal insulation aluminum skin of different thicknesses, and the strength and stability of the aluminum skin are enhanced by rolling. The circular thermal insulation skin required for the installation of external insulation of the circular pipe is rolled in advance, which saves labor and shortens the production time. At the same time, the problem of burrs and unevenness on the edge of the thermal insulation aluminum skin is solved, and the installation fit of the thermal insulation aluminum skin and the thermal insulation effect of the pipe are improved.

[0028] Example 2

[0029] On the basis of Example 1, Figure 1 , Figure 2As shown, the hemming assembly 5 includes a limit seat 51 and a motor 52. The two limit seats 51 are fixedly arranged on the workbench 4. The motor 52 is arranged on the outside of the limit seat 51. A first roller 53 and a second roller 54 are rotatably arranged between the two limit seats 51. Both ends of the first roller 53 and the second roller 54 are respectively provided with spur gears 531. The spur gears 531 at both ends of the first roller 53 are meshed with the spur gears 531 at the corresponding end of the second roller 54. One end of the second roller 54 is connected to the motor 52 through a transmission shaft. 55 transmission connection, a sliding groove 56 is opened in the two limit seats 51, a moving block 57 is slidably arranged in the sliding groove 56, a screw 58 is arranged on the top of the moving block 57, the screw 58 is vertically inserted in the limit seat 51, the screw 58 is threadedly connected to the limit seat 51, a third roller 59 is rotatably arranged between the two moving blocks 57, and spur gears 531 are respectively arranged at both ends of the third roller 59, and the spur gears 531 at both ends of the third roller 59 are meshed with the spur gears 531 at the corresponding ends of the first roller 53.

[0030] The working principle and beneficial effects of the above technical solution are as follows: the workbench 4 supports the limit seat 51 and the motor 1 52, the limit seat 51 performs rotation limit on the first roller 53 and the second roller 54, the motor 1 52 drives the first roller 53 and the spur gears 531 at both ends to rotate, and the spur gears 531 at both ends of the first roller 53 rotate while the second roller 54 and the third roller 59 are driven to rotate through the engagement of the spur gears 531, and gaps are left between the first roller 53 and the second roller 54 and the third roller 59 respectively, and the unrolled thermal insulation aluminum sheet passes through the gaps between the first roller 53 and the second roller 54 respectively, and the first roller 53 is The insulating aluminum sheet is initially guided and pressed through the gap between the first roller 53 and the second roller 54, and then passes through the gap between the first roller 53 and the third roller 59, and the insulating aluminum sheet is extruded and rolled through the gap between the first roller 53 and the third roller 59 for secondary guided and pressed bending. The sliding groove 56 in the limit seat 51 limits the moving block 57, and by twisting the top of the screw 58, the thread between the screw 58 and the limit seat 51 allows the screw 58 to pull the moving block 57 up and down in the sliding groove 56 to adjust the gap width between the first roller 53 and the third roller 59, thereby facilitating the control of the thickness and curvature of the rolling of the insulating aluminum sheet.

[0031] Example 3

[0032] On the basis of Example 2, Figure 1 , Figure 3 As shown, the discharge assembly 6 includes a second motor 61 , a reducer 62 is provided at the output end of the second motor 61 , a sleeve shaft 63 is provided at one end of the reducer 62 , and a fixing module 64 is provided inside the sleeve shaft 63 .

[0033] The working principle and beneficial effects of the above technical scheme are as follows: the motor 2 61 drives the sleeve shaft 63 to rotate through the reducer 62, and when the sleeve shaft 63 rotates, it drives the thermal insulation aluminum skin barrel sleeved on the sleeve shaft 63 to rotate, and the thermal insulation aluminum skin on the thermal insulation aluminum skin barrel is rolled out for the rolling assembly 5 to perform rolling, and the fixing module 64 fixes the thermal insulation aluminum skin barrel sleeved on the sleeve shaft 63, so that the thermal insulation aluminum skin barrel rotates synchronously with the sleeve shaft 63 and will not slip out of the sleeve shaft 63.

[0034] Example 4

[0035] On the basis of Example 3, Figure 3 , Figure 4 As shown, the fixing module 64 includes a gas rod 641, and the gas rod 641 is fixedly arranged in the sleeve shaft 63. A cone head 642 is fixedly arranged at the output end of the gas rod 641. A slot 643 and a slide groove 644 are symmetrically opened on the inner wall of the sleeve shaft 63 with the cone head 642 as the axis. A clamping column 645 is inserted in the slot 643, and a limiting column 646 is fixedly arranged in the slide groove 644. Slide blocks 647 are fixedly arranged at both ends of the clamping column 645. The slide block 647 is sleeved on the limiting column 646. A buffer spring 648 is sleeved on the limiting column 646 between the slide block 647 and the inner wall of the gas rod 641. The end of the clamping column 645 close to the cone head 642 is an inclined surface and is in contact with the inclined surface of the cone head 642.

[0036] The working principle and beneficial effects of the above technical scheme are as follows: when the output end of the gas rod 641 is not extended, the sliders 647 at both ends of the clamping column 645 retract the clamping column 645 into the inner wall of the sleeve shaft 63 under the action of the buffer spring 648. When the thermal insulation aluminum barrel is working on the sleeve shaft 63, the output end of the gas rod 641 is extended, and the cone head 642 at the output end of the gas rod 641 pushes the clamping column 645 to move outside the sleeve shaft 63. The sliders 647 at both ends of the clamping column 645 move outside the sleeve shaft 63 along the limiting column 646 and compress the buffer spring 648. At this time, the clamping column 645 extending out of the sleeve shaft 63 is clamped into the corresponding groove of the thermal insulation aluminum barrel sleeve to stably fix the thermal insulation aluminum barrel sleeve, so that the thermal insulation aluminum barrel rotates synchronously with the sleeve shaft 63 and will not slip out of the sleeve shaft 63.

[0037] Example 5

[0038] On the basis of Example 4, Figure 5-Figure 7 As shown, it also includes a correction component 7, the correction component 7 is arranged on the hemming component 5, and the correction component 7 is made of conductive material.

[0039] The working principle and beneficial effects of the above technical scheme are as follows: the correction component 7 is arranged on the rolling component 5 to correct the thermal insulation aluminum skin transmitted between the rolling component 5 and the discharge component 6 up and down to prevent the thermal insulation aluminum skin from shifting in position during the transportation process from the discharge component 6 to the rolling component 5, resulting in folding and deviation of the thermal insulation aluminum skin transported to the rolling component 5, thereby causing the thermal insulation aluminum skin to have unqualified thickness or even damage to the rolling component 5. The correction component 7 made of conductive material with conductive properties conducts the static electricity generated by the equipment and the thermal insulation aluminum skin to the outside world during the correction process, thereby preventing accidents caused by static electricity accumulation from causing casualties and property losses.

[0040] Example 6

[0041] On the basis of Example 5, Figure 4 As shown, the deviation correction and cleaning assembly includes a rotating rod 71, which is rotatably arranged in the two limit seats 51, and two arc frames 72 are fixedly arranged on the rotating rod 71, and a pressure cylinder 73 is rotatably arranged on the arc frame 72. An arc frame 2 74 is arranged on the end of the rotating rod 71 extending out of the limit seat 51, and a gas rod 1 75 is arranged on the outer side of the limit seat 51. The extended end of the gas rod 1 75 is hinged to one end of the arc frame 2 74, and a connecting rod 1 76 is fixedly arranged on the outer side of the arc frame 72. A limit frame 77 is fixedly arranged on the outer wall of the limit seat 51, and a connecting rod 7 is vertically inserted in the limit frame 77. 8. The top of the linkage rod 78 is hinged to the connecting rod 1 76. An arc frame 3 79 is rotatably provided on the outer wall of the limit seat 51. One end of the arc frame 3 79 abuts against the bottom of the linkage rod 78. A pressure cylinder 73 is rotatably provided on the other end of the arc frame 3 79. A connecting rod 2 80 is provided at the bottom of one end of the arc frame 3 79. An abutting rod 81 is hinged at the bottom of the connecting rod 2 80. A sleeve 82 made of non-conductive material is provided on the workbench 4. An electrostatic belt 84 is connected between the bottom of the sleeve 82 and the ground. A conductive spring 83 is provided at the bottom of the sleeve 82. The bottom of the abutting rod 81 is inserted into the sleeve 82.

[0042] The working principle and beneficial effects of the above technical solution are as follows: when the heat-insulating aluminum sheet starts to be transported from the discharge assembly 6 to the roll edge assembly 5, the output end of the gas rod 1 75 extends to push the arc frame 2 74 and the rotating rod 71 to rotate, and the gas rod 1 75 also rotates at this time. The connection mode of the gas rod 1 75 and the limit seat 51 is convenient for the automatic adjustment of the pushing direction of the arc frame 2 74 matched with the gas rod 1 75. The rotating rod 71 drives the two arc frames 1 72 and the upper arc frame 1 72 at the same time. The pressing cylinder 73 rotates synchronously with the rotating rod 71 as the axis, and the end of the arc frame 72 connected to the pressing cylinder 73 falls in the direction of the thermal insulation aluminum sheet. While the arc frame 72 rotates, the connecting rod 76 on it presses the connecting rod 78 downward, and the connecting rod 78 moves vertically downward under the limit of the limit frame 77. The hinged connection between the connecting rod 78 and the connecting rod 76 facilitates the rotation of the connecting rod 76 without affecting the vertical downward movement of the connecting rod 78. When moving downward, pressure is applied to one end of the arc frame three 79 which is rotatably arranged on the outer wall of the limit seat 51, and the arc frame three 79 rotates with the connection point with the outer wall of the limit seat 51 as the axis, and the end of the arc frame three 79 connected to the pressure cylinder 73 is tilted toward the direction of the thermal insulation aluminum sheet, and the pressure cylinder 73 on the arc frame one 72 and the arc frame three 79 stops at the upper and lower surfaces of the thermal insulation aluminum sheet respectively, and the pressure cylinder 73 at the upper and lower surfaces of the thermal insulation aluminum sheet is corrected according to the thermal insulation aluminum sheets of different thicknesses to prevent the thermal insulation aluminum sheet from folding during transportation. The end of the arc frame three 79 that is not connected to the pressure cylinder 73 and the connecting rod two 80 at its bottom are pressed downward by the bottom of the linkage rod 78, and the connecting rod two 80 presses the abutting rod 81 downward, and the bottom of the abutting rod 81 moves vertically downward in the sleeve 82 to abut against the conductive spring 83, and the static electricity generated by the equipment during the transportation of the thermal insulation aluminum sheet is released through the static electricity belt 84 at the bottom of the sleeve 82, thereby preventing accidents caused by static electricity accumulation.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thermal insulation aluminum coiling machine, characterized in that: include: A base (1) is provided with a lifting platform (2) on the base (1), a workbench (4) is fixedly provided on the top of the lifting platform (2), and a rolling assembly (5) and a material discharge assembly (6) are provided on the workbench (4).

2. The heat-insulating aluminum coiling machine according to claim 1, characterized in that: The hemming assembly (5) comprises a limit seat (51) and a motor (52); the two limit seats (51) are fixedly arranged on the workbench (4); the motor (52) is arranged on the outside of the limit seats (51); a first roller (53) and a second roller (54) are rotatably arranged between the two limit seats (51); spur gears (531) are arranged at both ends of the first roller (53) and the second roller (54); the spur gears (531) at both ends of the first roller (53) are meshed with the spur gears (531) at the corresponding end of the second roller (54); one end of the second roller (54) is connected to the motor (52) via a transmission shaft ( 55) transmission connection, a sliding groove (56) is opened in the two limit seats (51), a moving block (57) is slidably arranged in the sliding groove (56), a screw (58) is arranged on the top of the moving block (57), the screw (58) is vertically inserted in the limit seat (51), the screw (58) is threadedly connected to the limit seat (51), a third roller (59) is rotatably arranged between the two moving blocks (57), and spur gears (531) are respectively arranged at both ends of the third roller (59), and the spur gears (531) at both ends of the third roller (59) are meshed with the spur gears (531) at the corresponding ends of the first roller (53).

3. The heat-insulating aluminum sheet reel machine according to claim 2, characterized in that: The discharge assembly (6) comprises a second motor (61), a reducer (62) is arranged at the output end of the second motor (61), a sleeve shaft (63) is arranged at one end of the reducer (62), and a fixing module (64) is arranged inside the sleeve shaft (63).

4. The heat-insulating aluminum sheet reel machine according to claim 3, characterized in that: The clamping module (64) comprises a gas rod (641) which is fixedly arranged in the sleeve shaft (63). A cone head (642) is fixedly arranged at the output end of the gas rod (641). A clamping groove (643) and a sliding groove (644) are symmetrically provided on the inner wall of the sleeve shaft (63) with the cone head (642) as the axis. A clamping column (645) is inserted in the clamping groove (643). A clamping column (645) is fixedly arranged in the sliding groove (644). A limiting column (646) is provided, and sliders (647) are fixedly provided at both ends of the clamping column (645). The sliders (647) are sleeved on the limiting column (646), and a buffer spring (648) is sleeved on the limiting column (646) between the slider (647) and the inner wall of the second gas rod (641). One end of the clamping column (645) close to the cone head (642) is an inclined surface and is in contact with the inclined surface of the cone head (642).

5. The heat-insulating aluminum sheet reel machine according to claim 2, characterized in that: It also comprises a deviation correction component (7), wherein the deviation correction component (7) is arranged on the hemming component (5), and the deviation correction component (7) is made of a conductive material.

6. The heat-insulating aluminum coiling machine according to claim 5, characterized in that: The deviation correction and cleaning assembly comprises a rotating rod (71), the rotating rod (71) is rotatably arranged in the two limiting seats (51), two arc-shaped frames (72) are fixedly arranged on the rotating rod (71), a pressure cylinder (73) is rotatably arranged on the arc-shaped frame (72), an arc-shaped frame (74) is arranged on one end of the rotating rod (71) extending outside the limiting seat (51), an air rod (75) is arranged on the outer side of the limiting seat (51), the extended end of the air rod (75) is hinged to one end of the arc-shaped frame (74), a connecting rod (76) is fixedly arranged on the outer side of the arc-shaped frame (72), a limiting frame (77) is fixedly arranged on the outer wall of the limiting seat (51), and a linkage rod (78) is vertically inserted in the limiting frame (77). The top of the linkage rod (78) is hinged to the connecting rod 1 (76); an arc frame 3 (79) is rotatably provided on the outer wall of the limit seat (51); one end of the arc frame 3 (79) is abutted against the bottom of the linkage rod (78); a pressure cylinder (73) is rotatably provided on the other end of the arc frame 3 (79); a connecting rod 2 (80) is provided at the bottom of one end of the arc frame 3 (79); a contact rod (81) is hinged at the bottom end of the connecting rod 2 (80); a sleeve (82) made of non-conductive material is provided on the workbench (4); an electrostatic belt (84) is connected between the bottom of the sleeve (82) and the ground; a conductive spring (83) is provided at the bottom of the sleeve (82); and the bottom of the contact rod (81) is inserted into the sleeve (82).

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