CN205838391U - Bushing shell for transformer lifting is worn cable lead-in wire traction and is adjusted specific purpose tool - Google Patents

Abstract

Bushing shell for transformer lifting is worn cable lead-in wire traction and is adjusted specific purpose tool, including crane, oscillating bearing and the second fixed pulley are installed in the arm end of crane, the outer ring of oscillating bearing is connected with the arm of crane, the inner ring of oscillating bearing connects the first fixed pulley, and the first fixed pulley is installed stay cord, and the first fixed pulley is walked around at the middle part of stay cord, of the present utility model the hoisting mechanism of winding is separated with stabilizing mechanism, make winding can more stablize in hoisting process.This utility model optimizes the structure of traction apparatus, makes winding lifting convenient.Oscillating bearing of the present utility model can make what the first fixed pulley adapted to stay cord automatically to pull angle, it is to avoid the excessive stay cord caused of the angle of stay cord and the first fixed pulley separate.

Description

Special tool for traction adjustment of transformer bushing hoisting and threading lead wire

technical field

The utility model relates to a special tool for traction adjustment of cable threading lead wires, in particular to a special tool for traction adjustment of cable threading lead wires for hoisting transformer bushings.

Background technique

If the transformer bushing fails, it needs to be disassembled for repair or replacement. Transformer bushing is a kind of expensive and delicate equipment. If the bushing equipment is damaged during hoisting, it will not only cause huge economic losses, but also delay the work process, resulting in the failure of the equipment to transmit power on time, which will affect the safe and reliable operation of the power grid. Oil-paper capacitor bushing is one of the important components of the transformer, which includes oil-paper capacitor bushing, dry bushing, etc. Oil-paper capacitive bushings are mainly used in power transformers, converter transformers and high-voltage oil-immersed reactors. They are not only responsible for connecting the high-voltage and low-voltage windings inside the transformer to the outlet device outside the oil tank through leads, so as to realize the connection between the transformer and the external network. It also acts as a fixed lead. According to the winding lead-out method, it is divided into disassembly type (composite type) and cable-through lead-out method.

In recent years, the number of casing accidents in operation has increased year by year. The main manifestations of faults are: poor structure or manufacturing process, poor installation process, etc., causing overheating of casing joints; flashover in rain or pollution flashover of the outer insulation of porcelain sleeve under harsh natural relief; aging cracks of windshield gaskets during long-term operation, and leakage Oil and water seepage will reduce the electrical insulation performance, and even the bushing will explode, causing the power transformer to be out of service and endangering the safe operation of the power system. Therefore, when a hidden danger is found in the bushing, which affects safe operation, it should be replaced in time.

Because the transformer bushing is heavy, the ceramic parts are easily damaged, the angle is difficult to adjust when hoisting in the air, and the bushing is shaken and unstable during hoisting, so the hoisting of the transformer bushing is a very difficult task. In the process of replacing the oil-paper capacitor cable-piercing bushing, it is necessary to ensure fast and efficient replacement of the bushing, and to ensure that the winding cable lead wire does not appear to be wound and broken due to additional force. Insulation paper is prone to breakage and affects insulation. The high-voltage cable paper and conductive aluminum foil of the capacitor core on the inner wall of the bushing will also be worn and scratched due to twitch friction with the winding lead, which will reduce the insulation performance and affect the main insulation. Therefore, it is very necessary to protect the winding leads in the process of hoisting the casing.

Utility model content

The purpose of the utility model is to provide a transformer bushing hoisting and threading lead wire traction adjustment special tool, which can solve the above problems.

In order to achieve the above object, the utility model is realized through the following technical proposals: a special tool for lifting transformer bushings, threading cables, and leading wires for traction adjustment, including a crane, a joint bearing and a second fixed pulley installed on the end of the boom of the crane, and an outer joint bearing. The ring is connected to the boom of the crane, the inner ring of the joint bearing is connected to the first fixed pulley, and a pull rope is installed on the first fixed pulley, the middle part of the pull rope bypasses the first fixed pulley, and one end of the pull rope is connected to the connecting rod, and the connecting rod The lower end is connected to the winding lead-out wire, and the lower end of the winding lead-out wire is connected to the winding. A fixed rope is installed on the second fixed pulley. The middle part of the fixed rope bypasses the second fixed pulley. The middle part of the lanyard is matched with the hook, the two ends of the lanyard are connected to the fixed seat, the fixed seat is a ring structure, the lower part of the fixed seat is equipped with a fixed tube, the fixed seat and the fixed tube are fitted on the fixed rod, and the inner diameter of the fixed tube is larger than the diameter of the fixed rod , the lower part of the fixed pipe is installed with two or more fixed rods, the lower end of the fixed rod is connected with the fixed ring, the side of the fixed ring is connected with the fixed rod, the side of the fixed ring is set on the winding lead-out line, the side of the fixed rod Install the camera.

In order to further realize the purpose of the utility model, the following technical solutions can also be adopted: a hook seat is installed on the upper part of the hook, and the hook seat cooperates with the fixed rope. A stepping motor is installed on the crane, and rollers are installed on the output shaft of the stepping motor, and the rollers cooperate with the stay rope.

The utility model has the advantages that: the utility model separates the hoisting mechanism of the winding from the stabilizing mechanism, so that the winding can be more stable during the hoisting process. The utility model optimizes the structure of the traction device and makes the hoisting of the winding more convenient. The joint bearing of the utility model can make the first fixed pulley automatically adapt to the pulling angle of the pull rope, and avoid separation of the pull rope from the first fixed pulley caused by the excessive angle of the pull rope. The combination of the fixed rope and the second fixed pulley of the utility model can facilitate the hook to maintain a firm connection with the hanging rope when swinging occurs. The cooperation between the fixing seat and the fixing pipe of the utility model can guide the fixing seat. The fixing ring of the utility model can not only play a guiding role for the lead-out wires of the winding, but also not occupy too much space, so that the hoisting of the winding is more stable. The camera of the utility model can facilitate the real-time monitoring of the hoisting process by operators. The utility model also has the advantages of simple and compact structure, low manufacturing cost and easy use.

Description of drawings

Fig. 1 is a structural schematic diagram of the utility model; Fig. 2 is a schematic structural diagram of the enlarged structure of part I of Fig. 1 .

Note: 1 joint bearing 2 first fixed pulley 3 pull rope 4 second fixed pulley 5 fixed rope 6 hook seat 7 hook 8 lanyard 9 connecting rod 10 fixing seat 11 fixing tube 12 fixing rod 13 fixing ring 14 winding lead wire 15 Winding 16 Crane 17 Roller 18 Stepping motor 19 Camera.

detailed description

The special tool for hoisting the transformer bushing, passing the cable, and leading the traction adjustment, as shown in Figure 1 and Figure 2, includes a crane 16, the end of the boom of the crane 16 is equipped with a joint bearing 1 and a second fixed pulley 4, and the outer ring of the joint bearing 1 and The boom of the crane 16 is connected, the inner ring of the joint bearing 1 is connected to the first fixed pulley 2, the first fixed pulley 2 is equipped with a stay rope 3, the middle part of the stay rope 3 bypasses the first fixed pulley 2, and one end of the stay rope 3 is connected to Connecting rod 9, the lower end of connecting rod 9 is connected to winding lead-out wire 14, the lower end of winding lead-out wire 14 is connected to winding 15, fixed rope 5 is installed on the second fixed pulley 4, the middle part of fixed rope 5 bypasses second fixed pulley 4, fixed The two ends of rope 5 connect hook 7, and hanging rope 8 is installed on the hook 7, and the middle part of hanging rope 8 cooperates with hook 7, and the two ends of hanging rope 8 connect fixing seat 10, and fixing seat 10 is ring structure, and the bottom of fixing seat 10 Install the fixed pipe 11, the fixed seat 10 and the fixed pipe 11 are fitted on the fixed rod 12, the inner diameter of the fixed pipe 11 is greater than the diameter of the fixed rod 12, two or more than two fixed rods 12 are installed on the bottom of the fixed pipe 11, the fixed rod The lower end of 12 is connected with fixed ring 13, and the side of fixed ring 13 is connected with fixed bar 12, and the side of fixed ring 13 is enclosed within on the winding lead-out line 14, and camera 19 is installed at the side of fixed bar 12.

The utility model separates the hoisting mechanism of the winding 15 from the stabilizing mechanism, so that the winding 15 can be more stable during the hoisting process. The utility model optimizes the structure of the traction device and makes the hoisting of the winding more convenient. The joint bearing 1 of the utility model can make the first fixed pulley 2 automatically adapt to the pulling angle of the stay rope 3, avoiding the separation of the stay rope 3 and the first fixed pulley 2 caused by the excessive angle of the stay rope 3. The cooperation between the fixed rope 5 and the second fixed pulley 4 of the present invention can facilitate the hook 7 to maintain a firm connection with the hanging rope 8 when swinging occurs. The cooperation between the fixing seat 10 and the fixing pipe 11 of the present utility model can guide the fixing seat 10 . The fixing ring 13 of the utility model can not only guide the winding lead wire 14, but also not occupy too much space, so that the hoisting of the winding 15 is more stable. The camera 19 of the utility model can facilitate the real-time monitoring of the hoisting process by the operator.

It avoids the direct force of the cable lead wire when the transformer bushing is hoisted, realizes the protection of the inner wall of the bushing capacitor during the transformer hoisting process, realizes the inner monitoring of the bushing during the hoisting process of the transformer bushing, and adjusts the hoisting angle at any time. Avoid the cable lead wire falling into the inside of the transformer due to improper operation.

Transformer cable threading is a cable lead drawn from the transformer winding tap, which passes through the inner wall of the bushing capacitor, and passes through the bushing as a primary guide line to connect with the primary line in the substation. In the process of replacing the bushing, if the force on the cable lead wire is too large, the copper wire of the cable lead wire will be wound and broken, the internal winding of the transformer will be damaged, and even the cable lead wire will be broken and separated from the winding, resulting in damage to the entire transformer.

Transformer capacitive bushings are coiled based on the principle of capacitive voltage division. The capacitor core is used as the main insulation. Its exterior is porcelain insulated, and qualified transformer oil is injected into the middle. The transformer winding cable passes through the outer wall of the capacitor inside the bushing. The adjustable fixed pulley adjuster is designed to adjust the cable angle when hoisting the bushing, so as to prevent the high-voltage cable paper and conductive aluminum foil of the capacitor core from being worn and scratched due to the twitch friction with the winding lead wire and affecting the main insulation.

With the help of our designed transformer oil-paper capacitive bushing hoisting, cable lead fixing and adjustment special tool, a small pinhole camera is fixed on the top of the professional connector to observe the wear and tear inside the bushing and whether there is any disturbance, winding and insulation paper wear on the cable. Phenomenon, adjust the lifting angle in time to avoid stress damage to the lead wire and the capacitor insulation layer inside the bushing.

According to the structure of the cable lead wire connector, the special connector and the cable lead wire connector are ingeniously designed and fixed by bolt insertion, so that the cable lead wire is controlled in the hands of the on-site operator during the entire hoisting process, and the cable lead wire is prevented from slipping into the transformer during the hoisting process In the ontology.

A special connector is designed to be fixed with the cable lead joint of the transformer bushing through the embedded bolt to ensure that it will not be disengaged. When the bushing is hoisted by a crane, it is ensured that the lead wire will not be twisted, deformed or worn due to additional stress. The special connector is fixedly connected with a non-slip, wear-resistant and flame-retardant rope. The other end of the non-slip, wear-resistant and flame-retardant rope is designed with a fixed pulley, and the non-slip, wear-resistant and flame-retardant rope is wound on the fixed pulley, which is responsible for casing threading, cable lead traction, and adjustment angle to ensure that it is not affected by external forces. The connection between the fixed pulley and the crane adopts the cardan shaft that can adjust the direction in all directions and the crane is fixed on the front edge of the boom, which is convenient for operation and angle adjustment. A small pinhole camera is fixed above the professional connector to observe the wear and scratches inside the casing and whether there is any disturbance, winding and abrasion of insulating paper in the cable.

The hook seat 6 is installed on the top of the hook 7, and the hook seat 6 cooperates with the fixed rope 5. The hook seat 6 of the utility model can make the hook 7 more stable.

Stepping motor 18 is installed on the described crane 16, and the output shaft of stepping motor 18 is installed roller 17, and roller 17 cooperates with stay cord 3. The stepping motor 18 of the utility model can control the traction distance more accurately, and improve the accuracy of hoisting of the winding 15 .

The technical solution of the utility model is not limited within the scope of the embodiments described in the utility model. The technical contents not described in detail in the utility model are all known technologies.

Claims (3)

1. The special tool for traction adjustment of transformer bushing hoisting, threading and leading wires, characterized in that it includes a crane (16), and the joint bearing (1) and the second fixed pulley (4) are installed on the end of the boom of the crane (16), and the joint bearing The outer ring of (1) is connected with the boom of crane (16), and the inner ring of joint bearing (1) is connected with the first fixed pulley (2), and stay rope (3) is installed on the first fixed pulley (2). The middle part of (3) bypasses the first fixed pulley (2), one end of the stay rope (3) is connected to the connecting rod (9), the lower end of the connecting rod (9) is connected to the winding lead-out wire (14), and the winding lead-out wire (14) The lower end of the lower end is connected to the winding (15), the second fixed pulley (4) is equipped with a fixed rope (5), the middle part of the fixed rope (5) walks around the second fixed pulley (4), and the two ends of the fixed rope (5) are connected to the hook (7), hanging rope (8) is installed on the hook (7), the middle part of the hanging rope (8) cooperates with the hook (7), and the two ends of the hanging rope (8) are connected to the fixed seat (10), and the fixed seat (10) It is a ring structure, the bottom of the fixed seat (10) is equipped with a fixed pipe (11), and the fixed seat (10) and the fixed pipe (11) are fitted on the fixed rod (12), and the inner diameter of the fixed pipe (11) is larger than the fixed rod ( 12), the bottom of the fixed tube (11) is equipped with two or more fixed rods (12), the lower end of the fixed rods (12) is connected to the fixed ring (13), and the side of the fixed ring (13) is connected to the fixed rod (12) connection, the side portion of the fixed ring (13) is enclosed within on the winding lead-out wire (14), and the side portion of the fixed rod (12) is equipped with a camera (19). 2. The special tool for traction adjustment of transformer bushing lifting, threading and lead wires according to claim 1, characterized in that: the upper part of the hook (7) is equipped with a hook seat (6), and the hook seat (6) is connected with the fixed rope (5) Cooperate. 3. The special tool for traction adjustment of transformer bushing hoisting, threading, and lead wires according to claim 1, characterized in that: a stepping motor (18) is installed on the crane (16), and the output shaft of the stepping motor (18) is installed Roller (17), roller (17) cooperates with stay cord (3).