An auxiliary device for the maintenance of explosion-proof high-voltage motor power supply box

Abstract

This invention relates to the field of motor repair equipment technology, specifically to an auxiliary device for the maintenance of explosion-proof high-voltage motor power supply boxes. The device includes a counterweight plate with load-bearing casters arranged around its four sides below. A fixed main plate is symmetrically arranged on the right side of the counterweight plate, with a gap between the fixed main plates. Support columns are symmetrically arranged on the upper side of the counterweight plate, with retractable support rods connected to their upper ends. Adjustable height wheels are provided on the upper parts of the support rods. A main support sleeve is located above the two adjustable wheels. The main support sleeve includes a connecting plate connecting the two support rods, with a main support plate protruding from the center of the connecting plate. A square through hole is provided on the main support plate, and a movable lifting bolt is installed within the square through hole. This invention allows for disassembly and assembly of the motor power supply box unaffected by the surrounding environment, and eliminates the need to readjust the position of the power supply box front cover when reinstalling it, thus improving work efficiency.

Description

Technical Field

[0001] This invention relates to the field of motor repair equipment technology, specifically to an auxiliary device for the maintenance of explosion-proof high-voltage motor power supply boxes. Background Technology

[0002] In the industrial sector, especially in oil refining and chemical plants, explosion-proof high-voltage motors are widely used due to their high efficiency, excellent performance, and reasonable explosion-proof structure. Explosion-proof high-voltage motors have an explosion-proof enclosure that isolates the internal electrical components, which may generate sparks, arcs, and dangerous temperatures, from the surrounding explosive gas mixture. To meet explosion-proof requirements, the enclosure is designed to be thicker and heavier; therefore, in terms of weight alone, explosion-proof high-voltage motors are significantly heavier than ordinary high-voltage motors of the same power. The junction box of an explosion-proof high-voltage motor is also significantly heavier than that of an ordinary high-voltage motor of the same power.

[0003] Generally, to ensure the safety of the equipment, the maintenance cycle for oil refining, chemical and other equipment areas is one and a half to two years. During the maintenance period, electrical workers will also focus on inspecting the high-voltage motors in the equipment area. One important and necessary maintenance item is to open the front cover of the power supply box of the explosion-proof high-voltage motor on site to check whether the wiring inside the power supply box is loose, whether water has entered and become damp inside, and whether the insulation is qualified and effective. If the junction box of the explosion-proof high-voltage motor is affected by water and moisture due to poor sealing, or if the wiring is loose and the contact is poor, it may produce electric arc, short circuit or even explosion under high voltage environment, which seriously endangers the safety of personnel and equipment.

[0004] Because most high-power explosion-proof high-voltage motor power boxes are located on one side of the casing and are quite heavy, they cannot be moved manually during operation. For high-voltage motors located in the pipe rack of the installation area, workers typically attach a chain hoist to the pipeline or steel frame directly above the motor, hooking the chain hoist's hook onto the lifting ring on the upper side of the motor power box's front cover. After hooking it, the bolts between the front and rear covers of the power box, as well as between the front cover and the bottom cable inlet flange, are removed. Then, the chain hoist is pulled to separate the front and rear covers. After separation, the operator inspects the interior according to safety regulations. However, because the front cover of the power box is very heavy, attaching it to a pipeline still containing materials poses a risk of it falling and injuring workers. Furthermore, this method is not feasible for motors located in open areas. Therefore, workers typically use a gantry crane to hoist the front cover of the power supply box. During this process, the gantry crane needs to be placed across the motor. Because the power supply box is located on one side of the machine casing, the chain hoist can only be used on one side of the gantry crane's crossbeam. After hoisting, the front cover of the power supply box will hang on one end of the gantry crane's crossbeam, causing uneven stress and swaying. This operation requires multiple people to assist, and it carries a certain degree of danger. After the motor power supply box is repaired, the front cover cannot be aligned with the rear cover during reinstallation. Multiple people must work together to push the front and rear covers together to align them and complete the reinstallation. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an auxiliary device for the maintenance of explosion-proof high-voltage motor power supply boxes.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: an auxiliary device for maintenance of an explosion-proof high-voltage motor power supply box, comprising a counterweight plate, load-bearing casters arranged around the lower perimeter of the counterweight plate, fixed main plates symmetrically arranged on the right side of the counterweight plate, with gaps between the fixed main plates, symmetrical support columns arranged on the upper side of the counterweight plate, telescopic support rods connected to the upper ends of the support columns, adjustable wheels with adjustable heights arranged on the upper parts of the support rods, a main support sleeve arranged above the two adjustable wheels, the main support sleeve including a connecting sleeve plate connecting the two support rods, a main support plate protruding from the middle of the connecting sleeve plate, a square through hole arranged on the main support plate, and a lifting bolt that can move left and right arranged in the square through hole.

[0007] Furthermore, the supporting base column is provided with an auxiliary support sleeve that can move up and down.

[0008] Furthermore, the auxiliary support sleeve includes a bottom ring connected to the support base column, and top screws for fixing the bottom ring are provided on both sides of the bottom ring. A diagonal brace is connected to one side of the bottom ring, and an auxiliary support member is connected to the other end of the diagonal brace. An auxiliary support bolt is provided inside the auxiliary support member.

[0009] Furthermore, a plurality of square grooves are provided on the upper surface of the fixed main board at relatively opposite positions, wherein a fixed sub-plate is provided in two opposite square grooves, and the size of the fixed sub-plate matches the square groove.

[0010] Furthermore, the fixed sub-plate is provided with fixed sub-plate through holes on both sides, and a fixed main plate groove matching the fixed sub-plate through holes is provided below the square groove. An anti-detachment bolt is provided in the fixed sub-plate through hole, and the anti-detachment bolt connects the fixed sub-plate and the fixed main plate together.

[0011] Furthermore, the supporting base column is a hollow cylinder, and a connecting sleeve is provided inside the upper end of the supporting base column. The inner wall of the connecting sleeve is provided with internal threads, and an adjusting ring is connected to the connecting sleeve through the internal threads. The inner wall of the adjusting ring is provided with internal threads, and a lower threaded post is provided at the lower part of the supporting rod. The lower threaded post is threadedly connected to the adjusting ring.

[0012] Furthermore, an adjusting ring sleeve is provided on the upper part of the adjusting ring.

[0013] Furthermore, the upper part of the support rod is provided with an upper threaded post, and an adjusting wheel is threadedly connected to the outer side of the upper threaded post. A rotating disk is provided below the adjusting wheel.

[0014] Furthermore, a cap is provided above the support rod.

[0015] The beneficial effects achieved by this invention are as follows:

[0016] 1. The present invention is not affected by the surrounding environment of the motor when disassembling and assembling the motor power supply box, and there is no need to readjust the position of the power supply box front cover when reassembling it. The power supply box front cover is aligned with the power supply box rear cover. The staff can easily remove and reassemble the front cover of the heavy power supply box through simple operation. The design is reasonable, effectively reducing the labor intensity of the staff and improving work efficiency.

[0017] 2. This invention relies on the cooperation of the main support plate, lifting bolts and the mounting groove of the lifting ring on the front cover of the power box to lift the front cover vertically. Under the premise of ensuring stability, the adjusting wheel can freely adjust the height of the main support sleeve, thus making it suitable for explosion-proof high-voltage motors of different sizes, with a wide range of applications.

[0018] 3. The present invention is equipped with an auxiliary support sleeve. The auxiliary support component on the auxiliary support sleeve can be connected to the original bolt holes of the front cover flange of the power box through auxiliary support bolts. The original bolt holes of the front cover flange of the power box provide two-point auxiliary support for the lifted front cover of the power box, which can ensure that there is no shaking during the disassembly and reassembly process. This not only reduces the difficulty of operation, but also ensures the safety of the staff.

[0019] 4. This invention is equipped with load-bearing casters, which can be moved to an open location after the front cover of the power box is removed, and can be pushed back when it needs to be reinstalled. The whole process is comfortable to use, quick to move, and has a good effect.

[0020] 5. The components of this invention are detachable and easy to install and remove. Heavy-duty and easily damaged parts can be replaced in a timely manner. It can be widely used in explosion-proof areas such as oil refining and chemical plants that have multiple explosion-proof high-voltage motors. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is an exploded view of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the counterweight plate structure;

[0024] Figure 4 This is a schematic diagram of the fixed subplate structure;

[0025] Figure 5 This is a schematic diagram showing the connection between the counterweight and the fixed sub-plate;

[0026] Figure 6 This is a schematic diagram showing the connection between the counterweight and the supporting base column;

[0027] Figure 7 This is a cross-sectional view of the connection between the supporting base column and the adjusting ring;

[0028] Figure 8 This is a schematic diagram showing the connection between the support column and the adjusting ring;

[0029] Figure 9 This is a schematic diagram showing the connection between the counterweight, the support column, and the adjusting ring;

[0030] Figure 10 This is a schematic diagram showing the connection between the support rod, adjusting ring, and adjusting wheel;

[0031] Figure 11 This is a partial structural diagram of the present invention. Figure 1 ;

[0032] Figure 12 This is a partial structural diagram of the present invention. Figure 2 ;

[0033] Figure 13 This is a schematic diagram of the power supply box cover structure;

[0034] Figure 14 This is the usage status of the invention. Figure 1 ;

[0035] Figure 15 This is the usage status of the invention. Figure 2 .

[0036] Explanation of markings in the diagram: 1. Load-bearing caster wheel; 2. Counterweight plate; 3. Fixed sub-plate; 4. Anti-loosening bolt; 5. Support base column; 6. Adjusting ring; 7. Support rod; 8. Adjusting wheel; 9. Auxiliary support sleeve; 21. Fixed main plate; 22. Square groove; 23. Fixed main plate groove; 31. Fixed sub-plate through hole; 41. Bolt body; 51. Connecting sleeve; 6. Adjusting ring; 61. Adjusting ring sleeve; 71. Lower threaded column; 72. Upper threaded column; 73. Plug cap; 81. Rotary disc; 91. Bottom ring ; 92. Diagonal brace; 93. Auxiliary support component; 94. Auxiliary support bolt; 95. Set screw; 100. Main support sleeve; 101. Connecting sleeve plate; 102. Main support plate; 103. Square through hole; 200. Lifting bolt; 300. Conduit; 400. Power cable; 500. Bottom flange of power supply box; 501. Fixing bolt; 600. Front cover of power supply box; 601. Front cover flange; 602. Lifting ring mounting groove; 700. Rear cover of power supply box; 701. Rear cover flange. Detailed Implementation

[0037] To better understand the purpose, structure, and function of this invention, the following detailed description of an explosion-proof high-voltage motor power supply box maintenance auxiliary device is provided in conjunction with the accompanying drawings.

[0038] like Figures 1 to 15 As shown, an auxiliary device for the maintenance of an explosion-proof high-voltage motor power supply box includes a fixing device, an adjusting device, an auxiliary device, and a main support device.

[0039] The fixing device includes a counterweight plate 2, load-bearing casters 1 arranged around the counterweight plate 2, support base columns 5 symmetrically arranged above the counterweight plate 2, a fixing sub-plate 3, and an anti-detachment bolt 4.

[0040] There are four load-bearing casters 1. The upper part of the load-bearing casters 1 is a flat square structure, which plays a more stable role.

[0041] The counterweight plate 2 has a "lock-like" structure, and its main body is a flat cuboid structure, such as... Figure 3 As shown, two fixed main plates 21 are symmetrically arranged on the right end face of a flat cuboid structure. The fixed main plates 21 are all cuboid in shape. Several square grooves 22 are provided on one side of the upper end face of the fixed main plates 21. A fixed main plate groove 23 is provided at the center of the bottom surface of each square groove 22. The inner wall of the fixed main plate groove 23 is provided with internal threads. The square grooves 22 on the two fixed main plates 21 are arranged opposite each other.

[0042] Two fixing plates 3 are provided. The fixing plates 3 are rectangular in shape. The height of the fixing plates 3 is the same as the depth of the square grooves 22, the width of the fixing plates 3 is the same as the width of the square grooves 22, and the length of the fixing plates 3 is the same as the farthest distance between the two oppositely arranged square grooves 22. Figure 5 As shown, the fixing sub-plate 3 can be completely inserted into the two opposing square grooves 22. Two circular through holes are symmetrically arranged at both ends of the fixing sub-plate 3, and the distance between the centers of the circular through holes on the fixing sub-plate 3 is the same as the distance between the centers of the two opposing fixing main plate grooves 23.

[0043] The anti-dislodgement device 4 has two sets of four units, and its overall structure is "dumbbell-shaped". Figure 4 As shown, the lower end of the anti-loosening bolt 4 is the bolt body 41, and the bolt body 41 has external threads on its outer side, allowing it to be threadedly connected to the groove 23 of the fixing main plate. The diameter of the middle part of the anti-loosening bolt 4 matches the diameter of the through hole 31 of the fixing sub-plate. The diameters of the two ends of the anti-loosening bolt 4 are the same and larger than the diameter of the middle part, so the anti-loosening bolt 4 can be locked onto the fixing sub-plate 3 through the through hole 31 of the fixing sub-plate without coming off. Figure 5 As shown, after the two fixed sub-plates 3 are inserted into the two square grooves 22 arranged opposite each other, the anti-slip bolt is threadedly connected to the groove 23 of the fixed main plate through the bolt body 41.

[0044] Two supporting columns 5 are provided. Each supporting column 5 is a hollow, elongated cylindrical structure. A connecting sleeve 51 is provided at the upper end of each supporting column 5. The connecting sleeve 51 is a hollow, short cylindrical structure, and its inner wall is provided with internal threads. Figure 7 As shown, the inner diameter of the connecting sleeve 51 is larger than the inner diameter of the supporting base column 5.

[0045] The adjustment device includes a support rod 7 connected to the support base column 5, an adjustment ring 6 located at the lower end of the support rod 7, and an adjustment wheel 8 located at the upper end of the support rod 7.

[0046] There are two adjusting rings 6. Each adjusting ring 6 is a short, hollow cylinder. The inner wall of the adjusting ring 6 has internal threads, and the outer wall at the lower end of the adjusting ring 6 has external threads. Figure 7 , Figure 8 As shown, the length of the external thread at the lower end of the adjusting ring 6 is the same as the depth of the connecting sleeve 51, and the inner diameter of the adjusting ring 6 is the same as the inner diameter of the supporting base column 5. An adjusting ring sleeve 61 is provided at the upper end of the adjusting ring 6, and the outer diameter of the adjusting ring sleeve 61 is the same as the outer diameter of the connecting sleeve 51.

[0047] Two support rods 7 are provided. The support rods 7 have a T-shaped structure, with the main body being a long cylinder. The overall diameter of the support rods 7 matches the internal diameter of the main body of the support base column 5, allowing the support rods 7 to move smoothly within the support base column 5. On the lower side of the main body of the support rods 7 is a lower threaded post 71 with external threads on its outer side; on the upper side of the main body of the support rods 7 is an upper threaded post 72 with external threads on its outer side; at the top of the main body of the support rods 7 is a cap 73, which has a T-shaped structure. The upper end of the cap 73 is a flattened cylinder with a diameter larger than the diameter of the main body of the support rods 7. Figure 10 As shown, the lower threaded post 71 can be threadedly connected to the inner side of the adjusting ring 6.

[0048] Two adjusting wheels 8 are provided. Each adjusting wheel 8 has a hollow, flat, flange-like structure. The inner wall of each adjusting wheel 8 has internal threads, allowing it to be threadedly connected to the upper threaded post 72. A rotating disk 81 protrudes outward from the lower end of each adjusting wheel 8. The rotating disk 81 has an annular structure, and its diameter is larger than that of the adjusting wheel 8. For example... Figure 10 As shown, the adjusting ring 6 is threadedly connected to the lower threaded post 71, and the adjusting wheel 8 is threadedly connected to the upper threaded post 72, which constitutes the adjusting device of the present invention.

[0049] like Figure 11 As shown, the fixing device and the adjusting device are connected together by the adjusting ring 6. By rotating the rotating disk 81, the adjusting wheel 8 can be adjusted up and down within the height of the upper threaded column 72; by rotating the support rod 7, the support rod 7 can be adjusted up and down within the height of the lower threaded column 71 and the support base column 5; the function of the adjusting ring 6 is that when the adjusting device rises to a suitable height, the adjusting ring 6 is threadedly connected to the connecting sleeve 51 to ensure that the adjusting device is stable and does not wobble. Figure 10 As shown, the entire adjustment device adjusts the exposed height of the support rod 7 by adjusting the adjustment ring 6 on the lower threaded column 71. After the adjustment is completed, the lower threaded column 71 is partially inserted into the support base column 5, and then the adjustment ring 6 is threadedly connected to the connecting sleeve 51.

[0050] The auxiliary device includes auxiliary support sleeves 9. Two auxiliary support sleeves 9 are provided, and each auxiliary support sleeve 9 has a "spoon-shaped" structure. The spoon-shaped portion of the auxiliary support sleeve 9 is a bottom ring 91, which is a flat ring structure. The inner diameter of the bottom ring 91 matches the outer diameter of the support base column 5. Two circular through holes are symmetrically arranged through the ring body of the bottom ring 91, and the circular through holes have internal threads. A set screw 95, which is a common bolt shape, is connected to the internal threads of the circular through holes. The spoon-shaped handle portion of the auxiliary support sleeve 9 is a diagonal brace 92, which has a square structure and connects to the ring body of the bottom ring 91. The spoon handle part of the auxiliary support sleeve 9 is an auxiliary support component 93. The auxiliary support component 93 is a cuboid structure with one end being a ring and the other end being a square. A circular through hole is provided through the center of the end face of the ring end of the auxiliary support component 93. An internal thread is provided in the circular through hole. An auxiliary support bolt 94 is connected to the internal thread of the circular through hole in the auxiliary support component 93. The auxiliary support bolt 94 is in the shape of an ordinary bolt.

[0051] like Figure 12 As shown, the auxiliary support sleeve 9 is fitted onto the outside of the support base column 5 through the bottom ring 91 and can move up and down on the outside of the support base column 5. After the position is moved appropriately, the two set screws 95 are threadedly connected to the circular through hole on the bottom ring 91, so that the two set screws 95 abut against the outer surface of the support base column 5, thereby fixing the auxiliary support sleeve 9.

[0052] The main support device includes a main support sleeve 100 and a lifting bolt 200. The main support sleeve 100 has an overall "inverted L-shaped" structure. A connecting sleeve plate 101 is vertically arranged on the lower side of the short side of the "inverted L-shaped" structure. The connecting sleeve plate 101 has an overall "racetrack-shaped" structure, with two circular through holes through both ends. The diameter of the circular through holes in the connecting sleeve plate 101 matches the diameter of the main body of the support rod 7. The horizontal long side of the main support sleeve 100 is the main support plate 102, which is a cuboid structure with one end being a ring and the other end being a square. Near the ring end of the main support plate 102, a square through hole 103 is arranged through the middle of the end face of the main support plate 102. The lifting bolt 200 is generally in the shape of a bolt, and the width of the square through hole 103 is sufficient to ensure that the bolt body of the lifting bolt 200 passes through without coming out.

[0053] In the refining and chemical processing areas, all explosion-proof high-voltage motor cables are laid from the distribution room to the site via cable trays. Near the high-voltage motor, cable trays are installed to lower the cables into the ground. From the cable tray lowering point to the vicinity of the high-voltage motor, cables are laid using 300mm galvanized conduit buried underground. For example... Figure 13The diagram shows the wiring of a high-voltage motor power supply box in an explosion-proof area. The conduit 300 extends from the ground, and the power cable 400 exits through the conduit 300 and enters the rear cover 700 of the power supply box for wiring. To meet explosion-proof requirements, there are fixing accessories at the bottom of the power supply box, including a bottom flange 500, fixing bolts 501, a front cover flange 601, and a rear cover flange 701. The bottom cover is connected to the front cover flange 601 and the rear cover flange 701 by fixing bolts 501. To meet explosion-proof requirements, the power supply box for explosion-proof high-voltage motors is designed to be bulky. To facilitate maintenance and easy opening of the power supply box, a lifting ring is designed at the top of the front cover 600. After removing the lifting ring, a lifting ring mounting groove 602 is available.

[0054] In practical use, such as Figure 14 As shown, the entire invention is pushed to the work site. By adjusting the two adjusting rings 6, the overall height of the invention is made to match the height of the high-voltage motor; by adjusting the two adjusting wheels 8, the height of the main support sleeve 100 is made to match the height of the power supply box; by adjusting the height of the two auxiliary support sleeves 9, the height of the auxiliary support component 93 is made to match the height of the bottom flange 500 of the power supply box. After adjustment, the two fixed sub-plates 3 are removed, and the invention is pushed in from the front of the power supply box, so that the conduit 300 enters the interior of the two fixed main plates 21, and the main support plates 102 are held close together on the upper side of the lifting ring mounting groove 602. After completion, the two fixed sub-plates 3 are placed in suitable square grooves 22, and the conduit 300 is wrapped around the two fixed sub-plates 3. The corresponding anti-loosening bolts 4 are tightened to provide auxiliary fixation. After completion, on the upper side of the main support plate 102, the lifting bolt 200 is threaded through the square through hole 103 and connected to the lifting ring mounting groove 602. After completing the above steps, remove the fixing bolts 501, insert the two auxiliary support pieces 93 between the front cover flange 601 and the bottom flange 500 of the power supply box, and then pass the two auxiliary support bolts 94 through the connection holes of the front cover flange 601 and the fixing bolts 501, and thread them onto the lower auxiliary support pieces 93. At this point, the support work for the front cover 600 of the power supply box is complete. Then, remove all the bolts between the front cover 600 and the rear cover 700 of the power supply box. After all bolts are removed, the front cover 600 and the rear cover 700 of the power supply box are completely separated. Observe whether they are secure. If the invention is securely supported, remove the two fixing plates 3, and remove the invention along with the removed front cover 600 of the power supply box. The state is as follows. Figure 15 As shown. After the maintenance is completed, push the front cover 600 of the power supply box back. Since the front cover 600 of the power supply box maintains the same height as when it was just removed throughout the process, no adjustment is needed when reinstalling. Simply align it with the rear cover 700 of the power supply box and tighten the bolts.

[0055] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. An auxiliary device for the maintenance of an explosion-proof high-voltage motor power supply box, characterized in that: The system includes a counterweight plate (2), with load-bearing casters (1) arranged around its lower perimeter. A fixed main plate (21) is symmetrically arranged on the right side of the counterweight plate (2), with a gap between the fixed main plates (21). Supporting base columns (5) are symmetrically arranged on the upper side of the counterweight plate (2). A retractable support rod (7) is connected to the upper end of each support base column (5). Adjustable height wheels (8) are arranged on the upper part of each support rod (7). A main support sleeve (100) is arranged above the two adjustment wheels (8). The main support sleeve (100) includes a connecting sleeve plate (101) connecting the two support rods (7). A main support plate (102) protrudes from the middle of the connecting sleeve plate (101). A square through hole (103) is provided on the main support plate (102). 03) The inner part is provided with a lifting bolt (200) that can move left and right. The support base column (5) is provided with an auxiliary support sleeve (9) that can move up and down. The auxiliary support sleeve (9) includes a bottom ring (91) connected to the support base column (5). The bottom ring (91) is provided with set screws (95) on both sides to fix the bottom ring (91). The bottom ring (91) is connected to a diagonal brace (92) on one side. The diagonal brace (92) is connected to an auxiliary support member (93) at the other end. The auxiliary support member (93) is provided with an auxiliary support bolt (94). The upper surface of the fixed main plate (21) is provided with several square grooves (22) at relative positions. Two of the opposite square grooves (22) are provided with a fixed sub-plate (3). The size of the fixed sub-plate (3) matches the square groove (22).

2. The explosion-proof high-voltage motor power supply box maintenance auxiliary device according to claim 1, characterized in that: The fixed sub-plate (3) is provided with fixed sub-plate through holes (31) on both sides. The square groove (22) is provided with a fixed main plate groove (23) that matches the fixed sub-plate through holes (31). The fixed sub-plate through holes (31) is provided with anti-detachment bolts (4). The anti-detachment bolts (4) connect the fixed sub-plate (3) and the fixed main plate (21) together.

3. The explosion-proof high-voltage motor power supply box maintenance auxiliary device according to claim 1, characterized in that: The supporting base column (5) is a hollow cylinder. A connecting sleeve (51) is provided inside the upper end of the supporting base column (5). An internal thread is provided on the inner wall of the connecting sleeve (51). An adjusting ring (6) is connected to the internal thread of the connecting sleeve (51). An internal thread is provided on the inner wall of the adjusting ring (6). A lower threaded column (71) is provided at the lower part of the supporting rod (7). The lower threaded column (71) is threadedly connected to the adjusting ring (6).

4. The explosion-proof high-voltage motor power supply box maintenance auxiliary device according to claim 3, characterized in that: An adjustment ring sleeve (61) is provided on the upper part of the adjustment ring (6).

5. The auxiliary device for maintenance of an explosion-proof high-voltage motor power supply box according to claim 1, characterized in that: The upper part of the support rod (7) is provided with an upper threaded column (72), and an adjusting wheel (8) is threadedly connected to the outer side of the upper threaded column (72). A rotating disk (81) is provided below the adjusting wheel (8).

6. The auxiliary device for maintenance of an explosion-proof high-voltage motor power supply box according to claim 1, characterized in that: A cap (73) is provided above the support rod (7).

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