High-voltage switch cabinet mutual inductor maintenance and replacement device

Abstract

A high-voltage switch cabinet mutual inductor maintenance and replacement device comprises a chassis, universal wheels are installed at the lower end of the chassis, a supporting frame is fixed to one side of the upper end of the chassis, and a pull rod is fixed to the other end of the upper end of the chassis. A tray is fixed to the supporting frame, a hydraulic jack is arranged on the tray, a sleeve cap is arranged at the top end of the hydraulic jack, and a fine adjustment assembly is installed at the top end of the pull rod. The height of one end of the bracket is finely adjusted through a fine adjustment assembly, the middle lower end of the bracket is jacked up through a sleeve cap, and the other end of the bracket supports the mutual inductor. According to the maintenance and replacement device for the mutual inductor of the high-voltage switch cabinet, the replacement efficiency of the mutual inductor can be improved.

Description

Technical Field

[0001] The utility model relates to a transformer maintenance auxiliary device, in particular to a transformer maintenance and replacement device for a high-voltage switch cabinet. Background Art

[0002] When replacing the transformer in the high-voltage switch cabinet, there are the following problems: the space in the rear cabinet of the high-voltage switch cabinet is small, and the transformer needs to be completely lifted up by manpower due to its large size and heavy weight, and then 4 fixing bolts are inserted and fixed after accurate alignment with the installation screw holes. During the upward lifting process, the transformer can easily slip and injure personnel and damage equipment. In addition, the operating space in the cabinet is extremely limited. When one person holds it up and aligns it upward, it is difficult for another person to install the fixing screws. This makes the replacement process time-consuming and labor-intensive. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a device for repairing and replacing a transformer of a high-voltage switch cabinet, so as to improve the efficiency and safety of equipment replacement, ensure that the applicability is very good, and the replacement is very convenient.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A device for repairing and replacing a transformer in a high-voltage switch cabinet comprises a chassis, a universal wheel is installed at the lower end of the chassis, a support frame is fixed to one side of the upper end of the chassis, and a pull rod is fixed to the other end, wherein a tray is fixed to the support frame, a hydraulic jack is arranged on the tray, a cap is provided at the top of the hydraulic jack, a fine-tuning assembly is installed at the top of the pull rod, one end of the bracket is fine-tuned in height by the fine-tuning assembly, the middle lower end of the bracket is lifted up by the cap, and the other end of the bracket supports the transformer.

[0006] The support frame is door-shaped and limits the bracket on the left and right sides.

[0007] The bracket is in a U-shape and comprises front and rear connecting plates and left and right side plates. The left and right side plates are in an L-shape and the width between the two matches the width of the mutual inductor.

[0008] The fine-tuning assembly comprises a screw rod, which is fixed on the pull rod. The screw rod freely passes through the through hole at the top end of the bracket and the upper and lower ends of the screw rod are locked by nuts.

[0009] A counterweight block or counterweight equipment is arranged on the chassis.

[0010] The utility model provides a device for repairing and replacing a transformer of a high-voltage switch cabinet, which has the following technical effects:

[0011] 1) By setting up a chassis with universal wheels, it is convenient to adjust the front, back, left and right; by setting up a bracket, it is convenient to reach into the cabinet and support the transformer; by setting up an adjustment component with a fine-tuning component at one end and a hydraulic jack at the other end, it can be adjusted up and down, which is convenient for quickly taking out and replacing the transformer.

[0012] 2) This device is small in size and has a large operating space, which greatly increases the operating space for maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0014] Figure 1 It is the front view of the utility model.

[0015] Figure 2 It is a left view of the utility model.

[0016] Figure 3 It is a partial structural schematic diagram of the utility model.

[0017] Figure 4 It is a structural schematic diagram of the bracket in the utility model.

[0018] Figure 5 This is a schematic diagram of the locking state of the bracket of the utility model after the fine-tuning component.

[0019] Figure 6 This is a schematic diagram of the present invention in which the bracket is in a loosened state after the fine-tuning assembly is released.

[0020] In the figure: support frame 1, fine adjustment component 2, sleeve cap 3, bracket 4, chassis 5, universal wheel 6, hydraulic jack 7, pull rod 8, tray 9. DETAILED DESCRIPTION

[0021] like Figure 1-2 As shown, a device for repairing and replacing a transformer in a high-voltage switch cabinet includes a chassis 5. The chassis 5 is rectangular, and a universal wheel 6 is installed at the lower end of the chassis 5 to facilitate movement and position adjustment. A counterweight block or counterweight device is placed on the upper end surface of the chassis 5. The counterweight block or counterweight device must be more than 50% larger than the mass of the replacement object for counterweighting, so that it can remain safe and stable when the transformer is removed later. A support frame 1 is welded to the left side of the upper end of the chassis 5, and a pull rod 8 is welded to the middle of the right side of the upper end of the chassis 5. The support frame 1 and the pull rod 8 are both vertically arranged, and the height of the support frame 1 is higher than the pull rod 8. A tray 9 is welded at a suitable position on the support frame 1, and a hydraulic jack 7 is placed on the tray 9. A cap 3 is fixed to the top of the hydraulic jack 7, and the upper end of the cap 3 is in contact with the bracket 4 and can lift the bracket 4. A through hole is opened at the right end of the bracket 4 , and a fine-tuning component 2 is installed at the top end of the corresponding pull rod 8 . The fine-tuning component 2 can be connected to the bracket 4 and perform fine-tuning on the bracket 4 .

[0022] The fine-tuning assembly 2 includes a screw 2.1, which is fixed to the pull rod 8. The screw 2.1 freely passes through the through hole at the top of the bracket 4 and is locked at the upper and lower ends by nuts 2.2. Figure 3 As shown, the screw rod 2.1 has a certain length, which allows the bracket 4 to move up and down a short distance (a few centimeters) and is locked and limited by the nut 2.2.

[0023] The diameter of the screw is about 3mm smaller than the diameter of the through hole at the top of the bracket 4. In this way, when the nut of the fine-tuning assembly 2 is not locked to the bracket 4 and remains loose (for example, the upper nut is rotated upward and is separated from the end face of the bracket 4 by several millimeters), and the hydraulic jack 7 is not supported, since the bracket 4 has a certain length, the end of the bracket 4 away from the fine-tuning assembly 2 will tilt downward at a certain angle under the action of gravity (this angle will not allow the mutual inductor to fall on the bracket 4 and slide out), as shown in FIG. Figure 5-6 That is, when the fine-tuning assembly 2 is loose, the end of the bracket 4 away from the fine-tuning assembly 2 will tilt downward, and later on, it will be lifted up by the hydraulic jack 7 in the middle.

[0024] The height of the support frame 1 here is higher than the height of the mutual inductor, while the height of the pull rod 8 is lower than the height of the lower end of the mutual inductor.

[0025] The support frame 1 is door-shaped and limits the bracket 4 on the left and right sides. This arrangement can effectively prevent the bracket 4 from tilting and being unstable.

[0026] The bracket 4 is in a square shape, and includes front and rear connecting plates and left and right side plates, and the left and right side plates are in an L shape and the width between the two side plates matches the width of the transformer. When the transformer is disassembled, it can be directly supported by the bracket 4.

[0027] The inner surface of the bracket 4 and the contact surface of the mutual inductor are provided with rubber, which can play a protective role on the one hand, and can also increase friction on the other hand to prevent the mutual inductor from sliding out due to relative sliding.

[0028] Working principle and process:

[0029] 1) Move the device and extend the bracket 4 into the cabinet so that the bracket 4 is located at the bottom of the transformer to be replaced, thus completing the rough alignment between the transformer and the bracket 4;

[0030] 2) Place the hydraulic jack 7 on the tray 9, and support the bracket 4 through the cap 3 on the top of the hydraulic jack 7 by adjusting the height of the hydraulic jack 7; in this process, adjust the nut of the fine-tuning component 2 to further fit the bracket 4 with the bottom of the transformer to be replaced;

[0031] 3) Then slightly raise the hydraulic jack 7 to apply force to the bracket 4 to support the transformer that needs to be replaced.

[0032] 4) After completing the above actions, one person holds the device to stabilize it, and the other person starts to remove the fixing nut of the transformer that needs to be replaced. After the nut is removed, the transformer is completely supported by the bracket 4.

[0033] 5) Then, loosen the nut of the fine-tuning assembly 2 at the back to allow it to be loose, and then adjust the hydraulic jack 7 to completely separate the transformer from the installation position in the high-voltage switch cabinet and move it down, and then push the device out of the switch cabinet. The installation should be carried out in the opposite order.

Claims

1. A device for repairing and replacing transformers in a high-voltage switch cabinet, characterized in that: The invention comprises a chassis (5), a universal wheel (6) is installed at the lower end of the chassis (5), a support frame (1) is fixed on one side of the upper end of the chassis (5), and a pull rod (8) is fixed on the other end, wherein a tray (9) is fixed on the support frame (1), a hydraulic jack (7) is arranged on the tray (9), a cap (3) is arranged on the top of the hydraulic jack (7), a fine adjustment component (2) is installed on the top of the pull rod (8), one end of the bracket (4) is finely adjusted in height through the fine adjustment component (2), the middle lower end of the bracket (4) is lifted up through the cap (3), and the other end of the bracket (4) supports the mutual inductor.

2. A high-voltage switch cabinet transformer maintenance and replacement device according to claim 1, characterized in that: The support frame (1) is door-shaped and limits the bracket (4) on the left and right.

3. A high-voltage switch cabinet transformer maintenance and replacement device according to claim 1, characterized in that: The bracket (4) is in the shape of a square, and comprises front and rear connection plates and left and right side plates, the left and right side plates are in an L shape, and the width between the two matches the width of the mutual inductor.

4. A high-voltage switch cabinet transformer maintenance and replacement device according to claim 1, characterized in that: The fine-tuning assembly (2) comprises a screw rod, which is fixed on a pull rod (8). The screw rod freely passes through a through hole at the top end of the bracket (4) and the upper and lower ends of the screw rod are locked by nuts.

5. A high-voltage switch cabinet transformer maintenance and replacement device according to claim 1, characterized in that: The chassis (5) is provided with a counterweight block or a counterweight device.

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