CN211681733U - Transformer bushing clamp - Google Patents

Abstract

The utility model provides a transformer bushing anchor clamps for carry out the dismouting to the transformer bushing including sleeve pipe main part and sleeve pipe pull rod, this transformer bushing anchor clamps include: drawing means and at least one support means; in the supporting device, a first lead screw comprises a first screw rod arranged on a supporting bracket and a first nut spirally combined with the first screw rod, a first driving motor is connected with the first screw rod, the first nut is connected with a supporting clamp, the supporting bracket is connected with a transformer main body, and the supporting clamp is connected with a sleeve main body; in the drawing device, the second screw rod comprises a second screw rod arranged on the drawing support and a second nut combined with the second screw rod in a spiral mode, the second driving motor is connected with the second screw rod, the second nut is connected with the drawing clamp, the drawing support is connected with the sleeve main body, and the second nut is connected with the sleeve pull rod. This scheme of utilization can promote and carry out validity and the security of dismouting to the transformer bushing.

Description

Transformer bushing clamp

Technical Field

The utility model relates to a transformer bushing loading and unloading technical field, in particular to transformer bushing anchor clamps.

Background

The transformer bushing comprises a bushing pull rod and a hollow bushing main body sleeved outside the bushing pull rod, wherein a section of interference fit connection is arranged between the bushing main body and the bushing pull rod. When the transformer bushing is installed on the transformer, two modes are mainly provided, one mode is an integral installation mode, namely the transformer bushing is integrally installed on the transformer after being assembled, the other mode is a step-by-step installation mode, namely, the bushing pull rod is vertically inserted into the transformer and is connected with the pull rod supporting piece, and the bushing main body is sleeved with the bushing pull rod from the upper end of the bushing pull rod. The transformer bushing is heavy, and part of the transformer bushing can reach 1.2 tons, and a step-by-step installation mode is generally adopted for the installation of large transformer bushings.

When the transformer bushing in the prior art is installed step by step, the bushing main body moves downwards based on self gravity to form interference connection with the bushing pull rod in the process of sleeving the bushing pull rod. This kind of installation mode step by step can all press pull rod support piece with transformer bushing's whole gravity in the installation, crushes pull rod support piece easily.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a transformer bushing anchor clamps to adopt substep installation formula time transformer bushing to press the problem of damaging the transformer among the solution prior art.

The embodiment of the utility model provides a solve above-mentioned and/or other technical problem and provide a transformer bushing anchor clamps for carry out the dismouting to the transformer bushing, wherein the transformer bushing includes sleeve pipe main part and suit and is in sleeve pipe pull rod in the sleeve pipe main part, this transformer bushing anchor clamps include: drawing means and at least one support means;

the support device includes: the device comprises a supporting bracket, a first lead screw, a first driving motor and a supporting clamp; the first lead screw comprises a first screw rod arranged on the supporting bracket and a first nut in screw combination with the first screw rod, the first driving motor is connected with the first screw rod, the first nut is connected with the supporting clamp, the supporting bracket is connected with the transformer main body, and the supporting clamp is connected with the casing main body; when the first driving motor drives the first screw rod to rotate, the first nut drives the supporting clamp to move, so that the sleeve main body moves towards the direction close to the transformer main body under the support of the supporting clamp;

the drawing device comprises: the drawing fixture comprises a drawing bracket, a second lead screw, a second driving motor and a drawing clamp; the second screw rod comprises a second screw rod arranged on the drawing support and a second nut in threaded combination with the second screw rod, the second driving motor is connected with the second screw rod, the second nut is connected with the drawing clamp, the drawing support is connected with the sleeve main body, and the second nut is connected with the sleeve pull rod; when the second driving motor drives the second screw rod to rotate, the second nut drives the drawing clamp to move, and the drawing clamp applies pulling force to the sleeve pull rod in a direction opposite to the moving direction of the sleeve main body.

Optionally, the number of the supporting devices is two, and the connecting positions of the two supporting clamps and the casing main body included in the two supporting devices are symmetrical about the axis center of the casing main body.

Optionally, the transformer bushing fixture further comprises: a control center;

the control center is connected with the first driving motor and each second driving motor;

the control center controls the rotating speed of the first driving motor and the rotating speed of each second driving motor, so that the movement rates of the supporting clamp and the drawing clamp are equal.

Optionally, the support device further comprises: a first track and a first slider;

the first rail is arranged on the supporting bracket, and the first sliding block is slidably arranged on the first rail and connected with the first nut;

the first sliding block slides along the first track, so that the first nut moves linearly in the direction close to the transformer main body.

Optionally, the supporting device further comprises a first limiting part mounted on the supporting bracket;

when the supporting clamp moves to the position where the sleeve main body is completely connected with the sleeve pull rod, the first limiting part limits the movement of the first sliding block.

Optionally, the first limiting part comprises a first limiting seat and a first limiting screw;

the first limiting seat is fixed on the supporting bracket, a first limiting screw hole is formed in the first limiting seat, and the first limiting screw is in threaded connection with the first limiting screw hole;

when the supporting clamp moves to the position that the sleeve main body is completely connected with the sleeve pull rod, the first sliding block is in contact with one end of the first limiting screw.

Optionally, the drawing device further comprises: a second track and a second slider;

the second rail is arranged on the drawing support, and the second sliding block is arranged on the second rail in a sliding mode and is connected with the second nut;

the second sliding block slides along the second track, so that the second nut moves linearly in the direction far away from the transformer main body.

Optionally, the drawing device further comprises a second limiting part mounted on the drawing bracket;

when the drawing clamp moves to the position where the sleeve main body is completely connected with the sleeve pull rod, the second limiting part limits the movement of the second sliding block.

Optionally, the second limiting part comprises a second limiting seat and a second limiting screw;

the second limiting seat is fixed on the drawing support, a second limiting screw hole is formed in the second limiting seat, and the second limiting screw is in threaded connection with the second limiting screw hole;

when the drawing clamp moves to the position that the sleeve main body is completely connected with the sleeve pull rod, the second sliding block is in contact with one end of the second limiting screw.

Alternatively,

a support bottom plate is arranged on the support bracket, a first mounting hole is formed in the support bottom plate, and the support bracket is fixedly mounted on the transformer main body through a bolt penetrating through the first mounting hole;

the drawing support is provided with a drawing bottom plate, the drawing bottom plate is provided with a second mounting hole, and a bolt penetrating through the second mounting hole fixedly installs the drawing support on the sleeve main body.

According to the technical scheme, the transformer bushing clamp comprises the drawing device and the supporting device. When the sleeve main body is installed based on the device, the drawing clamp of the connecting sleeve pull rod can move upwards, and the supporting clamp of the connecting sleeve main body can move downwards at the same speed, so that the pull rod supporting piece of the supporting sleeve pull rod is not stressed and does not have axial displacement, and the damage of the pull rod supporting piece can be reduced. In the process of disassembling the transformer bushing, the drawing clamp of the connecting bushing pull rod can move downwards, and the supporting clamp of the connecting bushing main body can move upwards at the same speed, so that the pull rod supporting piece of the supporting bushing pull rod is not stressed and does not have axial displacement, and the damage of the pull rod supporting piece can be reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram illustrating a transformer bushing clamp according to an embodiment of the present invention;

fig. 2 is a perspective view (front side) of a drawing device according to an embodiment of the present invention;

fig. 3 is a side view of a drawing apparatus according to an embodiment of the present invention;

fig. 4 is a perspective view (front) of a supporting device according to an embodiment of the present invention;

fig. 5 is a perspective view (reverse side) of a support device according to an embodiment of the present invention;

fig. 6 is a front view of a support device according to an embodiment of the present invention;

fig. 7 is a control diagram of a control center according to an embodiment of the present invention;

fig. 8 is a schematic diagram illustrating another transformer bushing clamp according to an embodiment of the present invention;

fig. 9 is a top view of a load bearing body according to an embodiment of the present invention;

fig. 10 is a perspective view of a bearing body according to an embodiment of the present invention.

In the drawings, 1: a transformer bushing; 10: a casing pull rod; 11: a cannula body; 12: a sleeve body flange; 2: a transformer body; 21: a transformer housing; 22: a tie bar support; 100: a support device; 110: a support bracket; 111: a support base plate; 112: a first mounting hole; 120: a first lead screw; 121: a first screw; 122; a first nut; 130: a first drive motor; 131: a synchronous pulley assembly; 140: supporting the clamp; 150: a first guide rail; 160: a first slider; 170: a first limiting part; 171: a first limiting seat; 172: a first limit screw; 180: a first hoisting part; 200: a drawing device; 210: drawing the bracket; 211: drawing the bottom plate; 212: a second mounting hole; 220: a second lead screw; 221: a second screw; 222, c; a second nut; 230: a second drive motor; 240: drawing the clamp; 250: a second guide rail; 260: a second slider; 270: a second limiting part; 271: a second limiting seat; 272: a second limit screw; 280: a second hoisting part; 300: a control center; 400: a load bearing body; 410: a first recess; 420: a second recess.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments, based on the embodiments in the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the scope of the present invention.

Example 1

As shown in fig. 1, please refer to fig. 2 to fig. 8, an embodiment of the present invention provides a transformer bushing clamp for assisting in mounting and dismounting a transformer bushing 1.

This transformer bushing anchor clamps include: a drawing device 200 and at least one support device 100. As shown in fig. 1, the supporting device 100 is two.

As shown in fig. 2 and 3, each drawing device 200 includes: a second driving motor 230, a second lead screw 220, a drawing jig 240, and a drawing bracket 210; the second screw 220 includes a second screw 221 mounted on the drawing bracket 210 and a second nut 222 screw-coupled with the second screw 221, the drawing jig 240 is connected with the second nut 222, and the second driving motor 230 is connected with the second screw 221. The second driving motor 230 drives the second screw 221 to rotate, thereby driving the second nut 222 and the drawing jig 240 to move together along the axial direction of the second screw 221.

As shown in fig. 4, 5 and 6, the supporting device 100 includes: a first driving motor 130, a first lead screw 120, a support jig 140, and a support bracket 110. The first lead screw 120 includes a first screw 121 mounted to the support bracket 110 and a first nut 122 screw-coupled to the first screw 121. The first screw 121 is mounted on the support bracket 110 through a bearing. The support jig 140 is coupled to the first nut 122, and the first driving motor 130 is coupled to the first screw 121. In this embodiment, as shown in fig. 3, the first driving motor 130 is connected to the first screw 121 via a synchronous pulley assembly 131. In other embodiments, the first driving motor 130 may be connected to the first screw 121 through a gear assembly. The first driving motor 130 drives the first screw rod 121 to rotate, thereby driving the first nut 122 and the support jig 140 to move in the axial direction of the first screw rod 121.

It should be noted that, those skilled in the art can easily understand that the lead screw includes a screw rod, a nut, a steel ball and a reverser, and the present invention omits some features for simplicity in the description process, and does not consider that the lead screw of the present invention does not include a steel ball and a reverser.

In this embodiment, the first driving motor 130 and the second driving motor 230 are both used as driving motors. The driving motor has the advantage of stable control.

In an embodiment of the present invention, as shown in fig. 7, the transformer bushing clamp may further include a control center 300, wherein the control center 300 is respectively in control connection with the first driving motor 130 and the second driving motor 230. When in use, the control center 300 sends control signals to the first driving motor 130 and the second driving motor 230 respectively, and controls the first driving motor 130 and the second driving motor 230 to work respectively. The first driving motor 130 drives the first screw rod 121 to drive the first nut 122 to move along the first screw rod 121, so as to drive the supporting clamp 140 to move; the second driving motor 230 drives the second screw 221 to drive the second nut 222 to move along the second screw 221, so as to drive the drawing fixture 240 to move.

Preferably, in order to reduce the tedious work of pulling the cable during use, in this embodiment, the control center 300 is respectively connected to the first driving motor 130 and the second driving motor 230 through wireless communication modules. The wireless communication module includes a wireless transmitting module and a plurality of wireless receiving modules, the wireless transmitting module is connected with the control center 300, and the plurality of wireless receiving modules are respectively connected with the first driving motor 130 and the second driving motor 230.

As shown in fig. 1, when the transformer bushing clamp of the present invention is used to install or detach the bushing body, the transformer bushing 1 includes a bushing pull rod 10 and an internal hollow bushing body 11, and the lower end of the bushing body 11 is provided with a bushing body flange 12. The transformer body 2 includes a transformer housing 21 and a stay support 22. As shown in fig. 1, in this embodiment, taking the installation of the transformer bushing 1 to the transformer body 2 as an example, the bushing rod 10 is vertically inserted into the transformer body 2, so that the lower end of the bushing rod 10 is connected to the rod support 22, the two support devices 100 are respectively installed on the transformer housing 21, so that the pulling clamps 240 of the support devices 100 are oppositely disposed and distributed near the outer sides of the bushing rod 10, the bushing body 11 is sleeved from the upper end of the bushing rod 10, so that the pulling clamps 240 contact with the bushing body flange 12 of the bushing body 11 to support the gravity of the bushing body 11. Next, the drawing device 200 is installed at the upper end of the casing main body 11, and the support jig 140 is coupled to the casing rod 10. In the third step, the control center 300 sends a control command to the first driving motor 130 and the second driving motor 230, controls the first driving motor 130 to drive the first screw 121 to rotate, and controls the first nut 122 and the supporting clamp 140 to move upward, and at the same time, controls the second driving motor 230 to drive the second screw 221 to rotate, and controls the second nut 222 and the drawing clamp 240 to move downward. The control center controls the speed at which the support jig 140 moves upward to be the same as the speed at which the drawing jig 240 moves downward. It should be noted that other supporting surfaces in the horizontal direction, i.e. guiding the gravity of the sleeve body 11 to other supporting surfaces, can be used for the transformer housing 21 for installing the supporting device 100 to avoid crushing the transformer housing 21.

The drawing device 200 is integrally installed on the sleeve main body 11, the sleeve main body 11 moves downwards, the sleeve pull rod 10 is relatively static relative to the pull rod support 22, and the sleeve pull rod 10 and the sleeve main body 11 are sleeved through an interference fit section. In the process, the gravity of the bushing body 11 is supported by the supporting device 100, the gravity of the bushing body 11 is transmitted to the transformer housing 21 sequentially through the bushing body flange 12, the drawing jig 240, the second nut 222, the second screw 221 and the drawing bracket 210, and since the upward movement speed of the supporting jig 140 is the same as the downward movement speed of the drawing jig 240, the gravity of the bushing body 11 is not transmitted to the bushing rod 10 when the bushing body 11 moves downward.

Based on the connection relationship shown in fig. 1, when the casing main body 11 is installed, the drawing jig 240 is gradually moved downward at a certain speed based on the driving action of the second driving motor 230 with respect to any reference point, such as the ground, and the casing main body 11 held by the drawing jig 240 is held by the drawing jig 240 to be synchronously moved downward based on the self-gravity action, and simultaneously, the drawing device 200 connected to the upper portion of the casing main body 11 is integrally and synchronously moved downward. The lower support jig 140 moves up at the same speed while moving down by the driving of the first driving motor drive 130, thereby maintaining the position of the support jig 140 unchanged, i.e., the position of the bushing rod 10 is not displaced in the axial direction, so that it is possible to prevent the transformer from being crushed while moving down the bushing body 11 to achieve the installation of the bushing body 11.

Based on the same implementation principle, when the casing main body is disassembled, the overall position of the supporting device 100 is unchanged relative to the ground level, and the pulling clamp 240 can hold and overcome the gravity of the casing main body 11 to move upwards, and at the same time, the whole pulling device 200 moves upwards synchronously, and the supporting clamp 140 moves downwards, so that the casing pull rod 10 does not move relative to the ground level, and the pull rod supporting piece 22 connected with the casing pull rod 10 is not stressed and has no axial displacement, so that the casing main body 11 can move upwards to realize the disassembly of the casing main body 11, and the transformer can be prevented from being crushed.

In conclusion, the casing pull rod 10 can relatively move upwards while the casing main body 11 moves downwards, the displacements of the casing main body and the casing pull rod can be kept consistent, and the movement error is guaranteed to be controlled within 0.5mm through accurate control until the whole assembling process is completed. In the whole mounting and dismounting process, the pull rod support piece 22 is always free from stress and axial displacement, so that the mounting of the sleeve main body 11 is finished, the pull rod support piece 22 cannot be damaged, and the effectiveness and the safety of replacing the sleeve main body 11 are further improved.

In order to enhance the smoothness of the movement of the supporting clamp 140, the supporting device 100 further includes a first guide rail 150 fixedly mounted on the supporting bracket 110 and a first slider 160 slidably disposed on the first guide rail 150, the first guide rail 150 is arranged in parallel with the first screw 121, and the first slider 160 is fixedly connected with the first nut 122. In order to enhance the smoothness of the movement of the drawing clamp 240, the drawing device 200 further comprises a second guide rail 250 fixedly mounted on the drawing bracket 210 and a second slider 260 slidably disposed on the second guide rail 250, the second guide rail 250 is arranged in parallel with the second screw 221, and the second slider 260 is fixedly connected with the second nut 222. The stability that the reinforcing anchor clamps removed reduces the movement error, improves the bad effect of loss prevention. To facilitate the coupling of the drawing jig 240 with the casing bar 10, the drawing jig 240 is constructed in a U-shaped open structure as shown in fig. 2.

As shown in fig. 2 to 6, in order to prevent the position from being exceeded, the supporting device 100 further includes a first stopper portion 170, and the first stopper portion 170 is mounted to the supporting bracket 110 for restricting the movement of the first slider 160; the drawing device 200 further includes a second limiting portion 270, and the second limiting portion 270 is mounted on the drawing bracket 210 for limiting the movement of the second slider 260. The first slider 160 is prevented from exceeding the limit by the first limit part 170, thereby preventing the movement of the support jig 140 from exceeding the limit position.

Specifically, in this embodiment, the first limiting portion 170 includes a first limiting seat 171 and a first limiting screw 172, the first limiting seat 171 is fixed to the supporting bracket 110, the first limiting seat 171 is provided with a first limiting screw hole, and the first limiting screw 172 is in threaded connection with the first limiting screw hole. The second limiting portion 270 includes a second limiting seat 271 and a second limiting screw 272, the second limiting seat 271 is fixed to the drawing support 210, the second limiting seat 271 is provided with a second limiting screw hole, and the second limiting screw 272 is in threaded connection with the second limiting screw hole. The limit positions of the support jig 140 and the drawing jig 240 can be adjusted by screwing the limit screw.

In order to fix the drawing device 200 and the supporting device 100, the supporting bracket 110 is provided with a supporting base plate 111, and the supporting base plate 111 has a first mounting hole 112. The drawing bracket 210 is provided with a drawing base plate 211, and the drawing base plate 211 has a second mounting hole 212. As shown in fig. 2, in order to facilitate the passage of the casing rod 10, the drawing base 111 of the drawing bracket 210 of the drawing apparatus 200 has an arc-shaped opening, and referring to fig. 1, the drawing jig 240 is connected to the upper end of the casing rod 10 through an intermediate member. The width of the arc-shaped opening is larger than the diameter of the intermediate piece.

In order to facilitate the movement of the drawing device 200 and the supporting device 100, a first lifting part 180 is provided on the supporting bracket 110; the drawing bracket 210 is provided with a second sling 280. As shown in fig. 2 and 4, the sling is provided in a sling structure.

In this embodiment, the first driving motor 130 and the second driving motor 230 are controlled by the control center 30, so as to ensure the control accuracy. Of course, in the other embodiments of the present invention, each driving motor may be manually controlled by the operator to manually implement the synchronous linkage control. For example, when the worker presses a start button of the first driving motor 130, the worker may simultaneously press a start button of the second driving motor 230 to control the first driving motor 130 and the second driving motor 230 to simultaneously start operating. When the casing main body 11 moves up or down to a specific position, the first driving motor 130 and the second driving motor 230 are turned off at the same time.

Example 2

As shown in fig. 8, in the present embodiment, there are 1 supporting device 100, and one supporting device 100 is connected to the control center 300. In other embodiments, the number of the supporting devices 100 may also be more than 3, and when the supporting devices 100 are used, they are uniformly arranged around the circumference of the casing pull rod 10, so as to improve the stability of the support.

As shown in fig. 9 to 10, the transformer bushing clamp further includes a bearing body 400, and a first recess 410 for placing the drawing device 200 and a second recess 420 for placing the supporting device 100 are disposed on the bearing body 400. The drawing device 200 and the supporting device 100 may be placed on the upper surface of the carrier body 400. Meanwhile, in order to ensure the stability of the device during placement and movement, and to prevent the device from being damaged due to collision during movement, a concave portion matching with the drawing device 200 and the supporting device 100 may be provided on the upper surface of the supporting body 400 according to the shape of the bracket and the shape of the bottom plate. In this way, the pulling device 200 and the supporting device 100 can be placed in the respective recesses.

The utility model discloses each embodiment provides a transformer bushing anchor clamps has following beneficial effect at least:

1. the embodiment of the utility model provides a transformer bushing anchor clamps includes draw-off gear and strutting arrangement. When the sleeve main body is installed based on the device, the drawing clamp of the connecting sleeve pull rod can move upwards, and the supporting clamp of the connecting sleeve main body can move downwards at the same speed, so that the pull rod supporting piece of the supporting sleeve pull rod is not stressed and does not have axial displacement, and the damage of the pull rod supporting piece can be reduced.

2. The embodiment of the utility model provides an in, simultaneously, at the dismantlement in-process, the anchor clamps of drawing of adapter sleeve pull rod can move down, and the support anchor clamps of adapter sleeve main part can shift up with fast for the pull rod support piece of support sleeve pull rod does not receive the force and does not have axial displacement, can reduce pull rod support piece's damage.

3. The embodiment of the utility model provides a bear the weight of the main part and can realize the removal and the transportation of loading and unloading anchor clamps.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other similar elements in a process, method, article, or apparatus that comprises the element.

Finally, it is to be noted that: the above is only the preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, but not to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention is included in the protection scope of the present invention.

Claims (10)

1. Transformer bushing anchor clamps, transformer bushing (1) include sleeve pipe main part (11) and suit and are in sleeve pipe pull rod (10) in sleeve pipe main part (11), its characterized in that, this transformer bushing anchor clamps include: a drawing device (200) and at least one support device (100);

the support device (100) comprises: the device comprises a support bracket (110), a first lead screw (120), a first driving motor (130) and a support clamp (140); the first lead screw (120) comprises a first screw (121) mounted on the support bracket (110) and a first nut (122) in threaded engagement with the first screw (121), the first driving motor (130) is connected with the first screw (121), the first nut (122) is connected with the support clamp (140), the support bracket (110) is connected to the transformer body (2), and the support clamp (140) is connected to the bushing body (11); when the first driving motor (130) drives the first screw rod (121) to rotate, the first nut (122) drives the supporting clamp (140) to move, so that the sleeve main body (11) moves towards the direction close to the transformer main body (2) under the support of the supporting clamp (140);

the drawing device (200) comprises: the device comprises a drawing bracket (210), a second lead screw (220), a second driving motor (230) and a drawing clamp (240); the second lead screw (220) comprises a second screw (221) arranged on the drawing support (210) and a second nut (222) in threaded combination with the second screw (221), the second driving motor (230) is connected with the second screw (221), the second nut (222) is connected with the drawing clamp (240), the drawing support (210) is connected with the sleeve main body (11), and the second nut (222) is connected with the sleeve pull rod (10); when the second driving motor (230) drives the second screw rod (221) to rotate, the second nut (222) drives the drawing clamp (240) to move, so that the drawing clamp (240) applies a pulling force to the sleeve pull rod (10) in a direction opposite to the moving direction of the sleeve main body (11).

2. The transformer bushing clamp of claim 1,

the number of the supporting devices (100) is two, and the connecting positions of the two supporting clamps (140) and the casing main body (11) included in the two supporting devices (100) are symmetrical about the axis center of the casing main body (11).

3. The transformer bushing clamp of claim 1, further comprising: a control center (300);

the control center (300) is connected with the first driving motor (130) and each second driving motor (230);

the control center (300) controls the rotation speed of the first driving motor (130) and each of the second driving motors (230) to equalize the movement rates of the supporting jig (140) and the drawing jig (240).

4. The transformer bushing clamp of claim 1, wherein the support device (100) further comprises: a first rail (150) and a first slider (160);

the first track (150) is arranged on the support bracket (110), and the first sliding block (160) is arranged on the first track (150) in a sliding manner and is connected with the first nut (122);

the first slider (160) slides along the first rail (150) to make the first nut (122) move linearly in a direction approaching the transformer body (2).

5. The transformer bushing clamp of claim 4,

the supporting device (100) further comprises a first limiting part (170) arranged on the supporting bracket (110);

when the support clamp (140) moves to the state that the sleeve main body (11) is completely connected with the sleeve pull rod (10), the first limiting part (170) limits the movement of the first sliding block (160).

6. The transformer bushing clamp of claim 5,

the first limiting part (170) comprises a first limiting seat (171) and a first limiting screw (172), the first limiting seat (171) is fixed on the support bracket (110), a first limiting screw hole is formed in the first limiting seat (171), and the first limiting screw (172) is in threaded connection with the first limiting screw hole;

when the supporting clamp (140) moves to the state that the sleeve main body (11) is completely connected with the sleeve pull rod (10), the first sliding block (160) is contacted with one end of the first limiting screw (172).

7. The transformer bushing clamp of claim 1,

the drawing device (200) further comprises: a second track (250) and a second slider (260);

the second track (250) is arranged on the drawing bracket (210), and the second sliding block (260) is arranged on the second track (250) in a sliding way and is connected with the second nut (222);

the second sliding block (260) slides along the second track (250), so that the second nut (222) moves linearly in a direction away from the transformer main body (2).

8. The transformer bushing clamp of claim 7,

the drawing device (200) further comprises a second limiting part (270) arranged on the drawing support (210);

when the drawing clamp (240) moves to the state that the sleeve main body (11) is completely connected with the sleeve pull rod (10), the second limiting part (270) limits the movement of the second sliding block (260).

9. The transformer bushing clamp of claim 8,

the second limiting part (270) comprises a second limiting seat (271) and a second limiting screw (272), the second limiting seat (271) is fixed on the drawing support (210), a second limiting screw hole is formed in the second limiting seat (271), and the second limiting screw (272) is in threaded connection with the second limiting screw hole;

when the drawing clamp (240) moves to the state that the sleeve main body (11) is completely connected with the sleeve pull rod (10), the second sliding block (260) is contacted with one end of the second limiting screw (272).

10. The transformer bushing holder according to any one of claims 1 to 9,

a support bottom plate (111) is arranged on the support bracket (110), a first mounting hole (112) is formed in the support bottom plate (111), and the support bracket (110) is fixedly mounted on the transformer main body (2) through a bolt penetrating through the first mounting hole (112);

the drawing support (210) is provided with a drawing base plate (211), the drawing base plate (211) is provided with a second mounting hole (212), and a bolt penetrating through the second mounting hole (212) is used for fixedly mounting the drawing support (210) on the sleeve main body (11).

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