An expansion joint expansion device for the main transformer high voltage side clamp wire clamp

Abstract

The present invention relates to the technical field of electric power construction equipment, and in particular to an expansion joint expansion device for a clamp on a high-voltage side of a main transformer, comprising: a casing, a combined clamping portion for contacting the clamp is provided on one side of the casing, a driving assembly is provided in the middle of the casing, the driving assembly loosens a bolt on the clamp by driving the combined clamping portion to move back and forth, an expansion assembly is provided below the driving assembly, and a thrust assembly is provided on the right side of the casing; the present invention can quickly complete the disassembly of the nut and the expansion of the expansion joint of the clamp by buckling the device as a whole at the clamp, thereby solving the disassembly problem in a narrow space and eliminating the operation risk, while effectively improving the work efficiency, shortening the power outage time, and having good economic benefits.

Description

Technical Field

[0001] The invention relates to the technical field of electric power construction equipment, and in particular to an expansion joint expansion device for a main transformer high-voltage side clamp. Background Art

[0002] In the power maintenance work, for the maintenance of 110 kV main transformer, after a long period of maintenance experiment, it was found that the removal of the connection between the clamp and the bushing was very laborious, which greatly affected the maintenance progress. The reasons are as follows:

[0003] 1. The tools are not easy to use. On-site staff need to use three tools during the demolition process, namely wrench, hammer and screwdriver. During the work, they need to switch the tools used. The screwdriver is very easy to fall off when the expansion joint is constantly expanded, and the force area at the tail is small, so the hammer is easy to hit off-center. In addition, due to the different diameters of the screwdrivers and the small force area, the expansion joints cannot be expanded into place.

[0004] 2. The height of the wire clamp is too high and the standing plane is too small. The height of the 110 kV wire clamp is more than 2.6 meters from the transformer plane, and 1.9 meters from the standing plane, that is, the riser. The height of the test team members is about 1.75 meters, and the arm span is 2.15 meters. During dismantling, the personnel need to stand on the standing plane to operate, but the standing plane is only 10 square centimeters. The personnel cannot stand stably and need their hands to provide the main support. The soles of the personnel cannot be completely placed on the standing plane, and no fulcrum can be provided, resulting in further limitation of the personnel's force.

[0005] Therefore, it is very time-consuming to remove the four leads fixed on the wire clamp, and using existing tools for disassembly also involves operational risks and difficulties, which is very unfavorable for equipment maintenance work and prolongs the power outage time. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an expansion joint expansion device for the high-voltage side clamp of the main transformer in response to the above-mentioned technical deficiencies. By buckling the device as a whole on the clamp, the nut can be quickly disassembled and the expansion joint of the clamp can be expanded, thereby solving the disassembly problem in a narrow space and eliminating operational risks. At the same time, it effectively improves work efficiency, shortens power outage time, and has good economic benefits.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention includes:

[0008] A casing, one side of the casing is provided with a combined clamping part for contacting the wire clamp, the middle part of the casing is provided with a driving assembly, the driving assembly loosens the bolts on the wire clamp by driving the combined clamping part to move back and forth, an expansion assembly is provided below the driving assembly, and a thrust assembly is provided on the right side of the casing.

[0009] Preferably, the combined clamping part includes a base and a pressure frame; the base is fixed to the left side of the casing, and a fixing rod is symmetrically provided on the base; the two sides of the pressure frame are connected to the fixing rod, and a sleeve is symmetrically provided on the pressure frame, and a rotating sleeve connected to the nut is provided in the sleeve.

[0010] Preferably, the driving assembly includes a support plate, a displacement rack and a bracket; both ends of the support plate are fixedly connected to the casing, a first track is provided in the middle of the support plate, and a control motor is provided on the left side of the first track; the displacement rack is slidably connected to the first track, and the left side of the displacement rack is connected to the bracket; the bracket is L-shaped and arranged in pairs, and a ratchet plate connected to a rotating shaft is provided on the side of the bracket, and the driving directions of the two ratchet plates are opposite.

[0011] Preferably, a lifting channel is provided on the left side of the displacement rack, and the right side of the bracket is slidably connected to the lifting channel. A liquid supply channel driven by the swing of a ratchet plate is provided inside the bracket, and trigger tracks connected to the bracket are symmetrically provided at the front and rear of the support plate, and the trigger tracks are connected to the liquid supply channel.

[0012] Preferably, a thrust piece connected to the liquid supply channel is provided below the trigger track, and a flat plate is provided on the thrust piece.

[0013] Preferably, the expansion assembly includes a guide rail, a trigger head and a push plate; the guide rails are fixed in pairs on both sides of the left outlet of the casing, a slidable sliding block is provided in the guide rail, and a return spring is provided on the left side of the sliding block, and an intermediate rod connected to the sliding block is provided on the right side of the guide rail; the trigger head is connected to the sliding block by a rotating shaft, and a first guide surface is provided on the right side of the trigger head; the push plate is slidably connected to the inside of the casing, and the left side is in contact with the first guide surface.

[0014] Preferably, the thrust assembly includes a cross-bracing plate and a slide; the cross-bracing plate is fixed to the right side of the casing, and a hydraulic cylinder is provided above the cross-bracing plate; the slide is slidably connected to the cross-bracing plate, and is connected to the hydraulic cylinder at the top, and a first displacement member and a second displacement member are provided in sequence below the slide.

[0015] Preferably, a driven component is provided on the left side of the cross brace plate, and a passive rack connected to the driven component is provided on the right side of the driving component.

[0016] Preferably, the driven component includes an adjustment track, a special-shaped plate and a rotating shaft; the adjustment track is fixed to the left side of the cross-bracing plate, and a side push plate is provided on the adjustment track, and a support spring is installed between the side push plate and the adjustment track; the special-shaped plate is slidably connected to the adjustment track and realizes position adjustment during movement, and the special-shaped plate is respectively provided with a first meshing tooth and a second meshing tooth; the rotating shaft is connected to the left side of the cross-bracing plate, and a first gear is provided above the rotating shaft, and a second gear connected to the passive rack is provided below.

[0017] Preferably, an adjusting member is provided at the second gear.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. After the connecting bolts of the combined clamping part and the clamp are fixed, the whole device can be fixed, and the clamp can be disassembled by cooperating with the driving assembly and the expansion assembly. During the work, no staff participation is required, which solves the problem of inconvenience caused by the small traditional working area, effectively improves the disassembly efficiency, thereby shortening the power outage time and generating good economic benefits;

[0020] 2. The driving assembly drives the two rotating sleeves to rotate in the same direction by reciprocating movement to complete the disassembly of the bolts. During disassembly, the positioning of the casing itself will not be affected, and the entire disassembly process is kept stable, safe, reliable and reasonably designed.

[0021] 3. After the expansion component contacts the gap of the clamp, the trigger head is partially inserted into the gap and uses its own swing to expand the size of the gap, and then continues to expand deeply to meet the removal requirements of the wire and ensure that the gap is fully expanded;

[0022] 4. The structural design of the thrust component can adjust its insertion depth according to the situation of the gap when cooperating with the expansion component for expansion operation, so as to ensure that the gap can be expanded each time and avoid the situation of ineffective work;

[0023] 5. The structural design of the trigger track and the swinging action of the ratchet plate when the nut is screwed can realize the lifting operation of the bracket under the screwing work, so that it rises together with the nut, avoiding the friction between the ratchet plate and the rotating sleeve, improving the stability of the structure, reducing wear and tear, and extending the service life of parts;

[0024] 6. By adding a driven component, the hydraulic cylinder can be used to drive the nut at the initial stage of disassembly to provide a larger knob force, solving the problem of inconvenient disassembly when the nut is too tight. At the same time, after the initial loosening, it does not affect the subsequent disassembly of the driving component. The structural design is ingenious, and the existing power part is reasonably used without the need to add an additional power part. At the same time, after loosening, the thrust component can be used to drive the expansion component to work, thereby improving the disassembly efficiency and shortening the operation time.

[0025] 7. By inserting the stabilizing piece into the gap, the clamp can be prevented from rebounding when the expansion assembly is reset, causing the gap to shrink again, thereby improving the expansion efficiency and the rationality of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an expansion joint expansion device for a clamp wire clamp on the high-voltage side of a main transformer;

[0027] Figure 2 This is a schematic diagram of the installation status on the clamp;

[0028] Figure 3 It is a schematic diagram of the arrangement of the various parts of the internal structure of the casing;

[0029] Figure 4 It is a structural schematic diagram of the combined clamping part;

[0030] Figure 5 It is a schematic diagram of the structure of a partial combined clamping part;

[0031] Figure 6 It is a schematic diagram of the structure of the slewing sleeve and the brake member;

[0032] Figure 7 is a schematic diagram of the arrangement of the drive components;

[0033] Figure 8 It is a schematic diagram of the driving component extending state;

[0034] Fig. 9 It is a schematic diagram of the structure at the bracket;

[0035] Fig.10 It is a top view of the bracket;

[0036] Fig.11 This is a schematic diagram of the first form of the internal liquid supply channel of the stent;

[0037] Fig.12 This is a schematic diagram of the second state of the liquid supply channel inside the stent;

[0038] Fig.13 It is a schematic diagram of the connection between the ratchet plate and the swing pressure column;

[0039] Fig.14Schematic diagram of the displacement rack structure;

[0040] Fig.15 is a schematic diagram of the arrangement of the expansion assembly in the housing;

[0041] Fig.16 Schematic diagram for layout of driven components;

[0042] Fig.17 It is a schematic diagram of the connection between the driven component and the displacement rack;

[0043] Fig.18 is a schematic diagram of the structure of the driven component;

[0044] Fig.19 It is a schematic diagram of the structure of the special-shaped plate and the slide;

[0045] Fig. 20 The structure of the carriage is shown in FIG.

[0046] Fig.21 This is a schematic diagram of the stabilizing member in an extended state;

[0047] Fig. 22 It is a structural schematic diagram of the bottom support;

[0048] Fig.23 This is a schematic diagram of the internal connections of the casing.

[0049] In the figure: 1, housing; 2, combined clamping part; 3, driving assembly; 4, expansion assembly; 5, thrust assembly; 6, trigger track; 7, driven assembly; 8, adjustment track; 9, special-shaped plate; 10, rotating shaft; 11, first gear; 12, second gear; 13, adjusting member; 14, upper support plate; 15, force spring; 16, spring sheet; 17, swing pressure column; 18, stabilizing member; 201, bottom support; 202, pressure frame; 203, fixing rod; 204, sleeve; 205, rotating sleeve; 206, brake member; 207, elastic member; 301, support plate; 302, displacement rack; 303, bracket; 304, first track; 305, control motor; 306, ratchet plate; 307, lifting channel; 308, liquid supply channel; 309, passive rack; 401, guide rail; 402, trigger head; 403, push plate; 404, sliding block; 405, reset spring; 406, intermediate rod; 407, first guide surface; 501, cross support plate; 502, slide; 503, hydraulic cylinder; 504, first displacement member; 505, second displacement member; 506, first sliding plate; 507, elastic member; 601, thrust member; 602, flat plate; 801, side push plate; 802, support spring; 901, first meshing tooth; 902, second meshing tooth. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0051] Specific implementation method 1: Combination Figure 1-23 As shown, an expansion joint expansion device for a main transformer high-voltage side clamp wire clamp comprises: a casing 1, a combined clamping portion 2 for contacting the wire clamp is provided on one side of the casing 1, a driving component 3 is provided in the middle of the casing 1, and the driving component 3 loosens the bolts on the wire clamp by driving the combined clamping portion 2 to move back and forth, an expansion component 4 is provided below the driving component 3, and a thrust component 5 is provided on the right side of the casing 1.

[0052] A preferred embodiment, in combination with Figure 1-6 As shown, the combined clamping part 2 includes a base 201 and a pressing frame 202; the base 201 is fixed to the left side of the casing 1, and a positioning short plate is provided on the base 201. The positioning short plate contacts the side of the clamp wire clamp to achieve lateral positioning, and after the clamp is in close contact with the casing 1, the bolt on the clamp corresponds to the position of the rotating sleeve 205, and the base 201 is symmetrically provided with a fixing rod 203, and the pressing frame 202 is inserted into the fixing rod 203 and connected to the end of the fixing rod 203 by a nut to achieve the installation and fixation of the pressing frame 202, and the pressing frame 202 is symmetrically provided with a sleeve 204, and a rotating sleeve 205 connected to the nut is provided in the sleeve 204, and the outer surface of the rotating sleeve 205 has a screw thread that is connected to the nut. The gears have the same teeth, and the teeth of the two rotating sleeves 205 match in opposite directions; after installation, the sleeve 204 contacts the upper surface of the wire clamp and cooperates with the base 201 to complete the installation and fixation. At this time, the driving component 3 extends outward to drive the rotating sleeve 205 below to rotate counterclockwise first, and resets when it reaches the maximum stroke. During the resetting process, the position of the lower rotating sleeve 205 remains unchanged, while driving the upper rotating sleeve 205 to rotate counterclockwise, respectively completing the loosening operation of the two nuts, and completing the disassembly operation by repeatedly moving the driving component 3 back and forth; wherein, there is a notch on the sleeve 204, which provides a connection space between the rotating sleeve 205 and the driving component 3, and facilitates the installation or disassembly of the rotating sleeve 205.

[0053] A preferred embodiment, in combination with Figure 7-10As shown, the driving assembly 3 includes a support plate 301, a displacement rack 302 and a bracket 303; both ends of the support plate 301 are fixedly connected to the casing 1, a first track 304 is provided in the middle of the support plate 301, a control motor 305 is provided at the left side of the first track 304, a gear is installed on the control motor 305, the displacement rack 302 is slidably connected to the first track 304, and the upper part is meshed with the gear, and at the same time, the left side of the displacement rack 302 and the bracket 303 can be welded or screwed to form a fixed connection, the bracket 303 is L-shaped as a whole, and is arranged in pairs at the left side of the support plate 301, a ratchet plate 306 connected to a rotating shaft is provided on the side of the bracket 303, and the driving directions of the two ratchet plates 306 are opposite, and a spring sheet 16 is installed between the ratchet plate 306 and the bracket 303, which is used for The ratchet plate 306 is used to support the ratchet plate 306 and reset it after swinging; the displacement rack 302 is driven to move left and right along the first track 304 by controlling the motor 305 to rotate forward and reversely. During the leftward displacement and extension process, the ratchet plate 306 on the lower bracket drives the rotating sleeve 205 at the corresponding position to rotate counterclockwise to loosen the nut at the current position. After the displacement rack 302 reaches the specified position, the motor 305 is controlled to rotate in the opposite direction for reset. At this time, during the displacement process, the spring sheet 16 is continuously compressed during the displacement of the ratchet plate 306 on the lower bracket 303, and the ratchet plate 306 on the upper bracket 303 drives the rotating sleeve 205 at the corresponding position to rotate counterclockwise, thereby loosening the other nut. Therefore, the displacement rack 302 can completely remove the nut by repeatedly moving back and forth.

[0054] A preferred embodiment, in combination with Figure 7-14 As shown, in order to prevent the ratchet plate 306 from being worn out with the rotating sleeve 205 due to the nut rising along the thread of the bolt itself during the rotation of the rotating sleeve 205, a lifting channel 307 is provided on the left side of the displacement rack 302, and the right sides of the two brackets 303 are provided with a guide slider structure, which forms a sliding connection with the lifting channel 307, replacing the fixed connection form mentioned above, and a liquid supply channel 308 driven by the swing of the ratchet plate 306 is provided inside the bracket 303, and trigger tracks 6 connected to the bracket 303 are symmetrically provided at the front and rear of the support plate 301, and the trigger track 6 is connected to the liquid supply channel 308, and the connection method is as follows: Fig. 9As shown, the liquid supply channel 308 of the right bracket 303 is connected to the trigger track 6 on the left, while the liquid supply channel 308 of the left bracket 303 is connected to the trigger track 6 on the right, so that when the ratchet plate 306 on the left bracket 303 is pushing the rotating sleeve 205 to work, the ratchet plate 306 on the right bracket 303 is in a swinging state, and the liquid medium is absorbed and pressed out through the liquid supply channel 308 and transported to the trigger track 6, and the left bracket 303 is gradually raised to avoid excessive wear between the ratchet plate 306 and the rotating sleeve 205, improve the stability of the structure, extend the service life, and the size of the ratchet plate 306 can be designed to be smaller, reducing the manufacturing cost and its own weight.

[0055] A preferred embodiment, in combination with Fig. 9 As shown, a thrust piece 601 connected to the liquid supply channel 308 is provided under the trigger track 6, and a flat plate 602 is provided on the thrust piece 601. The flat plate 602 is in contact with the extended part of the bracket 303, and the liquid medium transported continuously enters the thrust piece 601, so that the thrust piece 601 gradually raises the flat plate 602, and pushes the bracket 303 to rise accordingly, so as to achieve the function of follow-up adjustment. After use, the liquid outlet pipeline of the thrust piece 601 can be opened to release the internal liquid medium to achieve the reset of the bracket 303.

[0056] A preferred embodiment, in combination with Fig.15As shown, the expansion assembly 4 includes a guide rail 401, a trigger head 402 and a push plate 403; the guide rails 401 are fixed in pairs on both sides of the left outlet of the casing 1, a slidable sliding block 404 is provided in the guide rail 401, and a return spring 405 is provided on the left side of the sliding block 404, the other end of the return spring 405 contacts the left inner wall of the casing 1, and an intermediate rod 406 connected to the right side of the sliding block 404 is provided on the right side of the guide rail 401; the left side of the trigger head 402 is connected to the sliding block 404 by a rotating shaft, and a first guide surface 407 is provided on the right side of the trigger head 402; the middle part of the push plate 403 is slidably connected to the inside of the casing 1 (i.e., below the support plate 301), and the left side has a second guide surface adapted to the first guide surface 407, and the second guide surface contacts the first guide surface 407; during operation, the thrust assembly 5 moves, first contacts with the intermediate rod 406, pushes the sliding block 404 to move to the left, and overcomes the elastic force of the return spring 405, so that The trigger head 402 penetrates into the gap of the clamp, and then the thrust assembly 5 continues to move, and the push plate 403 contacts it. The structural design of the first guide surface 407 and the second guide surface is used to push the trigger head 402 to rotate clockwise by a certain angle, thereby prying the gap of the clamp, and the size can be pried larger as needed, and the prying operation can be performed multiple times; wherein, in order to facilitate the resetting of the trigger head 402, a tension spring that generates an upward tension force is installed on the right side of the trigger head 402, and the trigger head 402 can be reset by relying on the tension of the tension spring after the trigger head 402 rotates clockwise during the resetting process. After the tension spring is installed, the displacement of the trigger head 402 will not be affected, and the use requirements of a small range of displacement are met. At the same time, in order to facilitate the resetting of the push plate 403 itself, a force spring is also installed under the push plate 403. The force spring is compressed when the push plate 403 moves to the left, and in the resetting process, the push plate 403 is reset to the right by relying on the elastic force of the force spring.

[0057] A preferred embodiment, in combination with Fig.16 , Fig.19 and Fig. 20As shown, the thrust assembly 5 includes a cross brace 501 and a slide 502; the cross brace 501 is fixed to the right side of the housing 1, and a small hydraulic cylinder 503 arranged horizontally is installed above the cross brace 501; the slide 502 is slidably connected to the right side of the cross brace 501, and is connected to the hydraulic cylinder 503 at the top, and a first displacement member 504 and a second displacement member 505 are arranged below the slide 502 in sequence; the hydraulic cylinder 503 drives the slide 502 to move leftward along the cross brace 501, and the second displacement member 505 First, it contacts the middle rod 406 and pushes the sliding block 404 to move to the left as a whole, so that the trigger head 402 is inserted into the gap of the clamp, and then the first displacement member 504 contacts the push plate 403, driving the push plate 403 to move, thereby realizing the prying action; wherein, in order to avoid structural interference, the middle rod 406 includes an outer rod and an inner rod, the outer rod and the inner rod are sleeved, and a constant force spring is provided inside, and the elastic force of the constant force spring is greater than the elastic force of the reset spring 405.

[0058] A preferred embodiment, in combination with Fig.14 , Figure 16-20 As shown, in order to overcome the problem that the tightening force of the nut is too large in the initial state, and thus a large torque control motor needs to be selected, a driven component 7 is arranged on the left side of the cross brace 501, and a passive rack 309 connected to the driven component 7 is arranged on the right side of the driving component 3. The nut is first loosened by relying on the hydraulic cylinder on the thrust component 5, so that a small power control motor can be selected to reduce manufacturing costs and structural limitations.

[0059] A preferred embodiment, in combination with Figure 16-20 As shown, the driven assembly 7 includes an adjustment track 8, a special-shaped plate 9 and a rotary shaft 10; the adjustment track 8 is fixed to the left side of the cross brace plate 501, a side push plate 801 is provided above the adjustment track 8, and a support spring 802 is installed between the side push plate 801 and the adjustment track 8. Initially, the support spring 802 is in a compressed state, the special-shaped plate 9 and the adjustment track 8 are slidably connected, and the first meshing teeth 901 and the second meshing teeth 902 are respectively provided in the special-shaped plate 9. Fig.19As shown in the figure, the first meshing tooth 901 and the second meshing tooth 902 are located on the lower surface of the left inner part of the special-shaped plate 9, and the second meshing tooth 902 is located on the upper surface of the right inner part of the special-shaped plate 9. The rotary shaft 10 forms a rotary shaft connection with the left side of the cross brace plate 501. A first gear 11 is provided above the rotary shaft 10, and the first gear 11 can be connected to the first meshing tooth 901 or the second meshing tooth 902. A second gear 12 connected to the passive rack 309 is provided below the rotary shaft 10, and the right side of the special-shaped plate 9 is slidably connected to the left side of the slide 502. When working, the hydraulic cylinder 503 drives the special-shaped plate 9 to move to the left through the slide 502, and the first meshing tooth 901 first engages with the driven rack 309. The first gear 11 is meshed and connected, and drives the passive rack 309 to move to the left through the second gear 12, driving the displacement rack 302 to extend first, and as it continues to move, the stroke of the first meshing tooth 901 is completed, and the side push plate 801, under the elastic force of the support spring 802, pushes the special-shaped plate 9 to move longitudinally a certain distance, so that the first gear 11 begins to be partially connected with the second meshing tooth 902, driving the displacement rack 302 to reset, thereby completing the removal of the nut respectively, and as the slide 502 continues to move to the left, it begins to trigger the expansion component 4 to work, and the subsequent control motor 305 drives the displacement rack 302 to continue to remove the nut. The structural design is ingenious and will not cause mutual interference.

[0060] A preferred embodiment, in combination with Fig.17 As shown, an adjusting member 13 is provided at the second gear 12, and the adjusting member 13 is a small electric push rod. The second gear 12 and the rotating shaft 10 are splined and can slide upward while maintaining the transmission of torque. The second gear 12 can be driven to rise as needed to disengage from the passive rack 309, so that when the drive component 3 has finished working and the expansion component 4 has just finished working, the thrust component 5 is reset. By disengaging the second gear 12, motion interference can be avoided to ensure the stability of the structure.

[0061] The specific working principle is as follows:

[0062] The staff climbs onto the working platform of the main transformer, moves sideways to the position of the wire clamp, lifts the casing 1, makes the positioning short plate on the bottom support 201 and the left side of the casing 1 fully contact with the wire clamp, realizes the initial positioning, then pushes the pressing frame 202 downward, makes the rotating sleeve 205 in the sleeve 204 engage with the nut on the bolt, and tightens the nut on the fixing rod 203, fully positions the pressing frame 202, now the installation work is completed, the nut can be removed and the wire clamp can be expanded, the staff lifts the right side of the bottom of the casing 1 with one hand to maintain the overall stability, starts the thrust assembly 5, and the hydraulic cylinder 503 drives the driving assembly 3 to loosen the nut first through the driven assembly 7, and then the control motor 305 continues to drive the driving assembly 3 to loosen the nut. During the disassembly process, since the fixation of the wire clamp has been released, as the thrust component 5 continues to work, it drives the expansion component 4 to pry open the gap. When multiple prying operations are required, in order to avoid the wire clamp from resetting, the stabilizing member 18 is extended and inserted into the gap to maintain the stability of the gap, thereby achieving synchronous drive, shortening working time, and improving work efficiency. During the disassembly and expansion process, no manual operation is required, and only the overall balance needs to be maintained. The situation in which the tools required in traditional operations are complex and diverse, and there are operational risks, is effectively avoided. Moreover, after installation, the staff does not need to adjust their position, and can lift the casing 1 in a smaller space, which is in line with actual usage conditions, greatly reduces the difficulty of operation, indirectly shortens the power outage time, and has good economic benefits. Specific implementation method 2

[0064] Regarding the positioning of the rotary sleeve, in order to prevent the ratchet plate 306 from causing the rotary sleeve 205 to reverse again during the return movement, the rotary sleeve 205 is rotated in the same manner as the ratchet plate 306. Figure 5-6 As shown, a brake member 206 is formed by adding two crimping rods to the pressing frame 202. One end of the two crimping rods is slidably connected to the pressing frame 202, and the other end is provided with a contact plate, which contacts the upper surface of the rotating sleeve 205. At the same time, a first positioning spring is provided on the crimping rod. The contact plate contacts the upper surface of the rotating sleeve 205 to generate friction, thereby achieving auxiliary positioning and preventing rotation. In addition, during the rising process of the rotating sleeve 205, the first positioning spring is compressed to prevent interference.

[0065] In a preferred embodiment, a rubber layer and protective grooves may be added to the surface of the contact plate to increase friction. Specific implementation method three

[0067] Regarding the structural form of the liquid supply channel 308, Fig.11 and Fig.13As shown, one end of the swing pressure column 17 is slidably connected to the inside of the liquid supply channel 308, and the other end is also slidably connected to the ratchet plate 306. At the same time, an L-shaped connecting hole is provided on the swing pressure column 17, and a one-way valve is provided in the direction of the liquid outlet of the liquid supply channel 308 to prevent the backflow of the liquid medium. The liquid inlet is connected to a liquid supply pump through a pipeline. When the ratchet plate 306 is forced to swing to a specified position, the connecting hole is connected to the internal channel, and the liquid medium can enter the trigger track 6 to achieve the lifting operation.

[0068] Another structural form, combined with Fig.12 As shown, the connection between the swing pressure column 17 and the liquid supply channel 308 is a disc-shaped structure, and a one-way valve is added in the direction of the liquid inlet to prevent the liquid medium from flowing out of the liquid inlet again when the swing pressure column 17 is displaced and compressed to the right. At this time, each swing of the ratchet plate 306 will produce a suction and pressure process in sequence to realize the supply of liquid to the trigger track 6. Specific implementation method four

[0070] Regarding the connection structure between the bracket 303 and the trigger channel 6, Fig. 9 As shown, the bracket 303 has a vertical pole extending downward, a sliding plate is welded at the bottom of the vertical pole, two cylindrical rods are symmetrically fixed on the sliding plate, a second positioning spring is sleeved on the cylindrical rod, and a rectangular plate is slidably connected to the upper end of the cylindrical rod. The lower surface of the rectangular plate is in contact with the second positioning spring, and the upper surface is in contact with the top of the trigger track 6. The second positioning spring can be compressed when the flat plate 602 is too high, and the second positioning spring is used to keep the bracket 303 stable in the normal state. Specific implementation method five

[0072] Regarding the second structural form of the second displacement member 505, Fig. 20 As shown, a slidable first sliding plate 506 is provided on the second displacement member 505, and an elastic member 507 is provided on the right side of the first sliding plate 506. The elastic member 507 can be a spring. When the intermediate rod 406 contacts the first sliding plate 506, during the pushing displacement process, it can play a role of overload protection after the trigger head 402 contacts the gap, and can enable the first displacement member 504 to continue to drive the pushing plate 403 to displace, thereby realizing the seam expansion operation and avoiding interference. Either arrangement can be selected with the above-mentioned intermediate rod 406 structure. Specific implementation method 6

[0074] Combination Fig.19 and Fig. 20 As shown, because the special-shaped plate 9 needs to produce a certain distance of longitudinal displacement under the action of the side push plate 801, at this time, the right side of the special-shaped plate 9 has a sliding groove, and the left end of the slide 502 has a sliding groove block that cooperates with the sliding groove. The two are connected by sliding to meet the needs of misalignment adjustment. Specific implementation method seven

[0076] Combination Figure 21-22 As shown, two cylindrical grooves are symmetrically fixed below the base 201, and the cylindrical grooves are concentrically arranged with the sleeve 204. At the same time, a clamping disk and a third force-bearing spring are provided in the cylindrical groove, wherein the clamping disk and the cylindrical groove are slidably connected, and at least one guide bar with a rectangular cross-section is provided in the cylindrical groove, and a guide groove slidably connected with the guide bar is provided on the clamping disk to implement guided positioning to avoid circular rotation, and one end of the third force-bearing spring contacts the bottom surface of the clamping disk, and the other end contacts the bottom surface of the cylindrical groove; during the installation stage, since the fixed part below the bolt does not necessarily coincide with the position on the clamping disk, during the installation process, the clamping disk will be pushed downward to compress the third force-bearing spring, and in the subsequent removal of the bolt, if the bolt body rotates, it can quickly engage with the slot on the clamping disk, thereby realizing the positioning of the bolt body, and will not affect the subsequent removal of the nut. The structural design is ingenious. Specific implementation method eight

[0078] Combination Fig.21 As shown, the stabilizing member 18 includes a pushing member and a clamping head; the pushing member is fixed to the left side of the casing 1, and can be in the form of an electric push rod or a small hydraulic cylinder. A trapezoidal block is fixed on the pushing member, and the trapezoidal block has multiple supporting surfaces of different widths for adapting to the support of different gaps. Specific implementation method nine

[0080] Combination Figure 4 and Figure 5 As shown, the pressure frame 202 includes an upper frame and a lower frame, the upper frame is equipped with a brake member 206, and is connected to the lower frame through an elastic member 207, and the sleeve 204 is welded to the lower frame to solve the problem that during the expansion process, the clamp wire clamp will generate an upward thrust through the sleeve 204. At this time, a small range of displacement can be achieved by compressing the elastic member 207, thereby improving the rationality of the overall structural design; wherein, the elastic member 207 includes a guide rod and a fourth force spring, the guide rod is slidably connected to the upper frame, the guide rod is fixedly connected to the lower frame at the bottom, and the fourth force spring is sleeved on the guide rod.

[0081] In summary, the present invention completes the installation and positioning of the clamp through the combined clamping part, and in the process of nut disassembly, it also uses the connection with the two bolts to achieve its own fixation and positioning, and relies on the cooperation between the drive component 3 and other structures to realize the operation of the nut and the expansion seam, shorten the intermediate waiting time, and improve the overall work efficiency. In addition, the thrust component 5 adopts a design method of driving different structures in stages, and realizes the drive adjustment of multiple components under a single power. The structural design is ingenious, which reduces the number of power sources, thereby reducing the manufacturing cost. The structures are mechanically connected, and the operation is more stable, which is convenient for promotion and application.

[0082] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modification, equivalent substitution, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. An expansion joint expansion device for a main transformer high voltage side clamp, characterized in that: include: A casing (1), wherein a combined clamping portion (2) for contacting a wire clamp is provided on one side of the casing (1), a driving assembly (3) is provided in the middle of the casing (1), the driving assembly (3) loosens a bolt on the wire clamp by driving the combined clamping portion (2) to move back and forth, an expansion assembly (4) is provided below the driving assembly (3), and a thrust assembly (5) is provided on the right side of the casing (1); The combined clamping portion (2) comprises a base (201) and a pressing frame (202); the base (201) is fixed to the left side of the housing (1), and a fixing rod (203) is symmetrically arranged on the base (201); both sides of the pressing frame (202) are connected to the fixing rod (203), and sleeves (204) are symmetrically arranged on the pressing frame (202), and a rotating sleeve (205) connected to a nut is arranged inside the sleeve (204); The driving assembly (3) comprises a support plate (301), a displacement rack (302) and a bracket (303); both ends of the support plate (301) are fixedly connected to the housing (1); a first track (304) is provided in the middle of the support plate (301); a control motor (305) is provided on the left side of the first track (304); the displacement rack (302) is slidably connected to the first track (304); the left side of the displacement rack (302) is connected to the bracket (303); the bracket (303) is L-shaped and arranged in pairs; a ratchet plate (306) connected to a rotating shaft is provided on the side of the bracket (303), and the driving directions of the two ratchet plates (306) are opposite; The expansion assembly (4) comprises a guide rail (401), a trigger head (402) and a push plate (403); the guide rails (401) are fixed in pairs on both sides of the left outlet of the housing (1); a slidable sliding block (404) is provided in the guide rail (401), and a return spring (405) is provided on the left side of the sliding block (404); an intermediate rod (406) connected to the sliding block (404) is provided on the right side of the guide rail (401); the trigger head (402) is connected to the sliding block (404) by a rotating shaft, and a first guide surface (407) is provided on the right side of the trigger head (402); the push plate (403) is slidably connected to the inside of the housing (1), and the left side is in contact with the first guide surface (407); The thrust assembly (5) comprises a cross brace (501) and a slide (502); the cross brace (501) is fixed to the right side of the housing (1), and a hydraulic cylinder (503) is provided above the cross brace (501); the slide (502) is slidably connected to the cross brace (501), and is connected to the hydraulic cylinder (503) at the top, and a first displacement member (504) and a second displacement member (505) are provided in sequence below the slide (502).

2. The expansion joint expansion device for the high-voltage side clamp of the main transformer according to claim 1 is characterized in that: A lifting channel (307) is provided on the left side of the displacement rack (302), and the right side of the bracket (303) is slidably connected to the lifting channel (307). A liquid supply channel (308) driven by the swing of a ratchet plate (306) is provided inside the bracket (303). Trigger tracks (6) connected to the bracket (303) are symmetrically provided at the front and rear of the support plate (301), and the trigger tracks (6) are connected to the liquid supply channel (308).

3. The expansion joint expansion device for the high-voltage side clamp of the main transformer according to claim 2 is characterized in that: A thrust piece (601) in communication with the liquid supply channel (308) is provided below the trigger track (6), and a flat plate (602) is provided on the thrust piece (601).

4. The expansion joint expansion device for the main transformer high voltage side clamp according to claim 1 is characterized in that: A driven component (7) is provided on the left side of the cross brace (501), and a passive rack (309) connected to the driven component (7) is provided on the right side of the driving component (3).

5. The expansion joint expansion device for the main transformer high voltage side clamp according to claim 4 is characterized in that: The driven component (7) comprises an adjustment track (8), a special-shaped plate (9) and a rotating shaft (10); the adjustment track (8) is fixed to the left side of the cross brace (501), a side push plate (801) is provided on the adjustment track (8), and a support spring (802) is installed between the side push plate (801) and the adjustment track (8); the special-shaped plate (9) is slidably connected to the adjustment track (8) and realizes position adjustment during movement, and a first meshing tooth (901) and a second meshing tooth (902) are respectively provided in the special-shaped plate (9); the rotating shaft (10) is connected to the left side of the cross brace (501), a first gear (11) is provided above the rotating shaft (10), and a second gear (12) connected to the passive rack (309) is provided below.

6. The expansion joint expansion device for the main transformer high voltage side clamp according to claim 5, characterized in that: An adjusting member (13) is provided at the second gear (12).

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