CN110828079B - Method for preparing composite insulator by dip-coating and special equipment thereof - Google Patents

Abstract

A method for preparing a composite insulator by dip coating and special equipment thereof are provided, wherein a ball end fitting of an insulator to be processed is embedded into a ball adapter groove, the axial distance is adjusted by means of bolt rotation, a ball socket end fitting of the insulator to be processed is fixed on the ball socket adapter, the ball socket adapter and a variable frequency motor coupler are arranged in an alignment manner, a coating groove is arranged between the ball adapter and the ball socket adapter, and a lifting device for driving the coating groove to lift is arranged at the lower end of the coating groove. The lifting device is controlled to lift the coating box, and most of the insulator to be processed is immersed into the liquid in the coating tank, so that the insulator to be processed is uniformly coated with the coating; the lifting device is controlled to realize the descending of the coating box, the insulator to be processed is separated from the coating tank liquid, and the rotating speed of the variable frequency motor is controlled to control the rotating speed of the insulator, so that the aims of soaking and removing redundant coating are fulfilled. According to the invention, in the process of realizing the coating infiltration of the insulator, the labor is saved, and the working efficiency and the product quality are improved.

Description

A method for preparing composite insulators by dip coating and its special equipment

Technical field

The invention belongs to the technical field of power transmission and transformation, and relates to a method for preparing composite insulators by dip coating and special equipment thereof.

Background technique

The use of composite insulators has played a huge role in improving the pollution flashover resistance of transmission lines and maintaining the safe operation of the power grid. Composite insulators are more and more widely used in transmission lines due to their excellent pollution flashover resistance, especially ultra-high voltage transmission lines. Currently, composite insulators are basically used. The use of composite insulators not only improves the pollution flashover resistance of UHV lines, but also greatly reduces the string length of insulators, reduces the size of poles and towers, and reduces project costs. However, composite insulators generally have the characteristics of small umbrella spacing and easy to be bridged by ice edges and arcs. Under icing weather conditions, the electrical performance of composite insulators is greatly reduced due to ice edges bridging the umbrella skirt gaps. The existing structure of composite insulators is There is no obvious advantage in using it in ice-covered areas, and many ice flash trips have occurred in ice-covered areas. As my country's power grid construction continues, more and more transmission lines pass through areas with severe ice coverage. Most of these lines have long paths and pass through mountainous areas with severe ice coverage. According to statistics, from 2005 to 2010, the DC transmission lines of the State Grid Corporation of China system tripped 41 times due to ice dancing, including 14 outages.

In order to solve the above technical problems, those skilled in the art usually improve composite insulators from two aspects. One is to improve the structure and shape, and the other is to meet the relevant mechanical stretching, bending load and other requirements. The surface of the insulator is coated with impregnation paint and silicone rubber to solve the technical bottleneck of the use of composite insulators in heavy ice areas, which greatly promotes the application of composite insulators in heavy ice areas. In the production process of coating the surface of composite insulators with impregnating paint and silicone rubber, the existing technology uses manual impregnation. This method is not only labor-intensive and inefficient, but also causes uneven and excessive adhesion of the coating and silicone rubber after impregnation. Many phenomena.

Contents of the invention

The object of the present invention is to overcome the deficiencies in the prior art and provide a method for preparing composite insulators by dip coating that can effectively improve work efficiency and product quality.

Another object of the present invention is to provide special equipment for the above dip coating method of preparing composite insulators.

The technical solution of the present invention includes the following steps: 1) Insert the ball head end fitting of the insulator to be processed at one end of the insulator to be processed into the groove of the ball head adapter with bolts, adjust the axial distance by rotating the bolt, and adjust the axial distance at the other end of the insulator to be processed. The ball-and-socket end fittings of the insulator to be processed are fixed on the ball-and-socket adapter, and the ball-and-socket adapter and the variable frequency motor coupling are installed in alignment and connected with bolts. At this time, the central axis of the ball-head adapter and the ball-and-socket adapter are in line with the to-be-processed insulator. Process the central axis of the insulator, the central axis of the variable frequency motor and its coupling in a straight line;

Turn on the lifting device: start the power controller on the electric screw lifting platform, and the speed-adjustable variable frequency motor starts to work, driving the commutator. The commutator drives 4 screw lifts through the connecting rod, and the 4 screw lifts rise simultaneously. Raise the paint tank to the designated position. At this time, most of the lower half of all umbrella disks of the insulator to be processed are immersed in the liquid in the coating tank;

Set the motor speed to 10r/min to make it suitable for rotation and infiltration of the insulator to be processed; turn on the motor and make the insulator to be processed follow the axial rotation of the motor until all umbrella disks and sheaths of the insulator to be processed are evenly coated with paint;

Turn on the lifting device: start the power controller on the electric screw lifting platform, and the speed-adjustable variable frequency motor starts to work, driving the commutator. The commutator drives 4 screw lifts through the connecting rod, and the 4 screw lifts descend simultaneously. Lower the paint tank to the designated position. At this time, all umbrella disks of the insulator to be processed have left the paint tank liquid;

Adjust the motor speed to 200~300r/min to make it suitable for rotating the insulator to be processed to remove excess paint. Turn on the motor so that the insulator to be processed follows the axial rotation of the motor until all umbrella disks and sheaths of the insulator are evenly removed from the excess paint. , the paint thrown out of the paint tank falls into the liquid tank, the insulator is removed and sent to the next process.

The technical solution of the special equipment of the present invention is: a driven end base and a power end base are installed on the platform base; a driven end assembly is installed on the driven end base, and the driven end assembly has a fitting for fixing the ball head end of the insulator to be processed. Ball head adapter; the ball head adapter is installed on the bearing seat through a tapered roller bearing; there is a motor on the power end base, and the motor is connected through a variable coupling to the ball socket adapter used to fix the ball socket end fittings of the insulator to be processed ; The ball head adapter and the ball socket adapter are arranged opposite to each other; a paint tank is provided between the ball head adapter and the ball socket adapter, and a lifting device is provided at the lower end of the paint tank to drive the paint tank up and down.

The central axes of the ball head adapter and the ball socket adapter of the present invention are in a straight line with the central axis of the insulator to be processed, the motor and its coupling.

The driven end assembly of the present invention also includes a base bottom plate, the bearing seat is installed on the base bottom plate through nuts, and the ball head adapter is installed on the bearing seat through tapered roller bearings.

One end of the ball head adapter of the present invention has an axial hole, and the axial hole is connected with the internal cavity of the ball head adapter; the ball head end of the insulator to be processed has a shaft, and the end of the shaft has a hardware The fitting head is a round end, and the diameter of the fitting head is smaller than the internal cavity of the ball head adapter and larger than the axial hole of the ball head adapter; there is a radial opening groove on the side end of the ball head adapter, and the radial opening The slot is connected to the axial hole and the internal cavity; the slot width where the radial opening slot is connected to the axial hole is larger than the shaft diameter of the ball end fitting of the insulator to be processed, and the radial opening slot is connected to the internal cavity The width of the slot is greater than the diameter of the fitting head of the ball end fitting of the insulator to be processed, and the height of the slot where the radial opening groove is connected to the internal cavity is greater than the thickness of the fitting head of the ball end fitting of the insulator to be processed.

The internal cavity of the ball head adapter according to the present invention has a radial through pin hole for inserting the first R pin.

The end of the ball and socket adapter of the present invention is a concave groove with a side opening. There is a hemispherical head in the concave groove. The central axis of the hemispherical head and the central axis of the ball and socket adapter are on the same straight line. The hemispherical head rotates through the ball socket. The joint baffle is connected to the concave groove and the ball socket adapter body; the ball socket end of the insulator to be processed has an axial hole of the ball socket end fitting, and the axial hole of the ball socket end fitting is connected with the internal cavity of the ball socket end fitting; There is an open slot at the side end of the ball and socket end fitting of the insulator to be processed. The open slot is connected to the axial hole of the ball and socket end fitting and the internal cavity of the ball and socket end fitting. The open slot is connected to the axial hole of the ball and socket end fitting. The width is greater than the width of the baffle of the ball and socket adapter. The width of the groove where the open groove is connected to the internal cavity of the ball and socket end fitting is greater than the diameter of the hemispherical head. The height of the groove where the open groove is connected to the internal cavity of the ball and socket end fitting is greater than the diameter of the hemispherical head. radius.

The internal cavity of the ball-and-socket end fitting of the present invention has a pin hole of the ball-and-socket end fitting adapter for inserting the second R pin.

The lifting device of the present invention is an electric screw lifting platform. The electric screw lifting platform includes a power controller, a speed-regulating variable frequency motor, a commutator, a connecting rod, a speed-regulating variable frequency motor and a commutator on the electric screw lifting platform. , connecting rod transmission connection, the connecting rod is transmission connected with the paint tank through 4 screw lifts

The invention realizes the lifting and lowering of the paint box by controlling the lifting device, and controls the rotation speed of the insulator by controlling the speed of the variable frequency motor, so as to achieve the purpose of soaking and removing excess paint. In the process of realizing insulator impregnation coating, manpower is saved and work efficiency is improved.

Description of drawings

Figure 1 is a schematic structural diagram of the present invention;

Figure 2 is a partial enlarged view of the driven end component;

Figure 3 is a schematic structural diagram of the ball head adapter;

Figure 4 is a top view of Figure 3;

Figure 5 is a schematic structural diagram of the ball head end fittings of the insulator to be processed;

Figure 6 is one of the schematic diagrams of the assembly of the ball head adapter and the ball head end fittings of the insulator to be processed;

Figure 7 is the second assembly diagram of the ball head adapter and the ball head end fittings of the insulator to be processed;

Figure 8 is a schematic structural diagram of the ball and socket adapter;

Figure 9 is a schematic structural diagram of the ball and socket end fittings of the insulator to be processed;

Figure 10 is a schematic diagram of the assembly of the ball socket adapter and the ball socket end fittings of the insulator to be processed.

In the drawing, 1. Driven end base; 2. Driven end assembly; 3. Protective cover; 4. Platform base; 5. Positioning channel steel; 6. Paint tank; 7. Liquid tank; 8. Ball socket rotor. Joint; 9. Variable coupling; 10. Coupling cover; 11. Motor; 12. Power end base; 13. Insulator to be processed; 14. Lifting device;

2-1. Base plate; 2-2. M42 nut; 2-3. Bearing seat; 2-4. Tapered roller bearing 30207; 2-5. Bearing gland; 2-6. M6 bolt assembly; 2-7 , ball head adapter; 2-8, axial hole; 2-9, internal cavity; 2-10, radial opening slot; 2-11, radial through pin hole; 2-12, first R pin ;

8-1. The concave groove of the ball and socket adapter; 8-2. The hemispherical head; 8-3. The baffle of the ball and socket adapter;

13-1. The ball end fitting of the insulator to be processed; 13-2. The ball end fitting of the insulator to be processed; 13-3. The axial hole of the ball end fitting; 13-4. The internal cavity of the ball end fitting; 13- 5. Pin hole for the ball socket end fitting adapter.

Detailed ways

In Figure 1, the platform base 4 is equipped with a driven end base 1 and a power end base 12; the driven end base 1 is equipped with a driven end assembly 2, and the driven end assembly 2 has fittings for fixing the ball head end of the insulator to be processed. The ball head adapter 2-7; there is a motor 11 (a variable frequency motor, including a variable frequency speed regulator) on the power end base 12, and the motor 11 is connected through the variable coupling 9 with the hardware (ball socket) at the other end of the insulator to be processed The ball-and-socket adapter 8 of the end fitting) is connected; the ball-head adapter 2-7 is opposite to the ball-and-socket adapter 8; a paint groove 6 is provided between the ball-head adapter 2-7 and the ball-and-socket adapter 8, The lower end of the coating tank 6 is provided with a lifting device 14 for driving the coating tank 6 to lift. The lifting device 14 is an electric screw rod lifting platform (four linkage type). The paint tank 6 has grooves corresponding to the ball head adapters 2-7 and the ball socket adapter 8 to facilitate immersing the insulator to be processed into the paint in the paint tank 6. The rod end of the ball head adapter 2-7 is an M10 thread, which can adjust the extension length of the insulator, tighten the insulator, and make it rotate horizontally and axially. The liquid accumulation tank 7 is located below the coating tank 6 and is slightly larger in length and width than the coating tank, so that the waste liquid rotated out of the coating tank 6 can flow into the liquid accumulation tank 7 .

In Figures 2, 3, and 4, the driven end assembly 2 includes a base plate 2-1 and a bearing seat 2-3. The bearing seat 2-3 is mounted on the base plate 2-1 through an M42 nut 2-2. The base plate 2-1 is fixed on the driven end base 1, and the ball head adapter 2-7 is installed on the bearing seat 2-3 through the tapered roller bearing 2-4 (model 30207). The frequency conversion motor power is 3KW. 2-5 is the bearing gland; 2-6 is the M6 bolt assembly; 2-8 is the axial hole; 2-9 is the internal cavity; 2-10 is the radial opening groove; 2-11 is for inserting the first The radial through-pin hole of the R pin.

Figure 5 shows the insulator ball head end fitting 13-1 to be processed.

In Figure 6 and Figure 7, the insulator is installed into the ball head end fitting 13-1 of the insulator to be processed, the ball head end fitting 13-1 of the insulator to be processed is stuck into the ball head adapter 2-7, and the first R pin 2 is inserted. -12 Adjust the bearing seat 2-3 in the radial through pin hole 2-11 until the insulator is tightened. At this time, the insulator is tightened due to the tensile force and is fixed to the first R pin 2-12, so it will not rotate during the rotation. fall off.

In Figure 8, the end of the ball and socket adapter 8 is a concave groove 8-1 of the ball and socket adapter with a side opening. There is a hemispherical head 8-2 in the concave groove of the ball and socket adapter, and the center of the hemispherical head 8-2 The axis is on the same straight line as the central axis of the ball and socket adapter 8. The hemispheric head 8-2 passes through the ball and socket adapter baffle 8-3 (connecting support block) and the concave groove 8-1 of the ball and socket adapter and the ball socket. The adapter body is connected.

In Figure 9, the ball socket end fitting 13-2 of the insulator to be processed has an axial hole 13-3 of the ball socket end fitting, and the ball socket end fitting axial hole 13-3 is connected with the internal cavity 13-4 of the ball socket end fitting; There is an open groove at the side end of the ball socket end fitting 13-2 of the insulator to be processed. The open groove is connected with the axial hole 13-3 of the ball socket end fitting and the internal cavity 13-4 of the ball socket end fitting. The open slot is connected with the ball socket end. The width of the slot where the axial hole 13-3 of the fitting is connected is greater than the width of the ball socket adapter baffle 8-3, and the width of the slot where the opening slot is connected to the internal cavity 13-4 of the ball socket end fitting is larger than the width of the hemispherical head 8-2 diameter, the height of the slot where the open slot communicates with the internal cavity 13-4 of the ball socket end fitting is greater than the radius of the hemispherical head 8-2. 13-5 is the pin hole of the ball socket end fitting adapter, which is a radial through pin hole.

In Figure 10, the insulator to be processed is loaded into the ball socket end fitting 13-2 of the insulator to be processed. The ball socket end of the ball socket end fitting 13-2 of the insulator to be processed is stuck into the ball socket adapter 8, and the second R pin is inserted into Inside the pin hole 13-5 of the ball socket end fitting adapter. The ball-and-socket adapter baffle 8-3 in the ball-and-socket adapter 8 blocks the upper edge of the insulator 13 to be processed, so that when it rotates, the insulator to be processed rotates along its central axis. Adjust the bearing seat 2-3 until the insulator to be processed is tightened. At this time, the insulator to be processed is tightened due to the tensile force and will not fall off during rotation.

When in use, the ball end fitting 13-1 of the insulator to be processed at one end of the insulator 13 is inserted into the slot of the ball head adapter 2-7 with bolts, and the axial distance is adjusted by rotating the bolt. The ball socket end fitting 13-2 of the processed insulator is fixed on the ball socket adapter 8, and the ball socket adapter 8 is installed in alignment with the variable frequency motor coupling and connected with bolts. At this time, the central axes of the ball head adapter 2-7 and the ball socket adapter 8 are in a straight line with the central axis of the insulator to be processed, the frequency conversion motor and its coupling.

Turn on the lifting device 14: Start the power controller on the electric screw lifting platform, and the speed variable frequency motor (which can control the lifting speed) starts to work, driving the commutator, which drives 4 screw lifts through the connecting rod, 4 The screw lifts rise in conjunction with each other at the same time, raising the paint tank 6 to the designated position. At this time, most of the lower half of all umbrella disks of the insulator to be processed are immersed in the liquid in the coating tank 6.

Set the speed of motor 11 (including frequency converter) to (10r/min) to make it suitable for rotational infiltration of the insulator to be processed. Turn on the motor 11 and make the insulator to be processed rotate axially along with the motor until all the umbrella disks and sheaths of the insulator to be processed are evenly coated with paint.

Turn on the lifting device 14: Start the power controller on the electric screw lifting platform, and the speed variable frequency motor (which can control the lifting speed) starts to work, driving the commutator, which drives 4 screw lifts through the connecting rod, 4 The screw lifts descend simultaneously to lower the paint tank 6 to the designated position. At this time, all the umbrella disks of the insulator to be processed leave the coating tank 6 liquid.

Adjust the speed of motor 11 (including frequency converter) (200~300r/min) to make it suitable for rotating the insulator to be processed to remove excess paint. Turn on the motor 11 and make the insulator to be processed rotate axially with the motor 11 until all the umbrella disks and sheaths of the insulator are evenly removed from the excess paint. The paint thrown out of the paint tank falls into the liquid tank, and the insulator is removed and sent to the next process.

Claims (9)

1. The method for preparing the composite insulator by dip coating is characterized by comprising the following steps: 1) Embedding a ball end fitting (13-1) of an insulator to be processed at one end of the insulator to be processed into a groove of a ball head adapter (2-7) with a bolt, and rotationally adjusting the axial distance by means of the bolt, wherein the ball end fitting (13-2) of the insulator to be processed at the other end of the insulator to be processed is fixed on a ball socket adapter (8), the ball socket adapter (8) is arranged in alignment with a variable frequency motor coupler, and the bolts are connected, and at the moment, the central axes of the ball head adapter (2-7) and the ball socket adapter (8) are in a straight line with the central axes of the insulator to be processed, the variable frequency motor and the coupler thereof;

starting the lifting device (14): starting a power supply controller on the electric screw rod lifting platform, starting a speed-regulating variable frequency motor to work, driving a commutator, driving 4 screw rod lifters by the commutator through a connecting rod, and simultaneously lifting the 4 screw rod lifters in a linkage way to lift the paint tank (6) to a specified position;

at the moment, most of the lower half pieces of all umbrella discs of the insulator to be processed are immersed into the liquid of the coating groove (6);

setting the rotating speed of the motor (11) to be 10r/min, so that the motor is suitable for rotary infiltration of the insulator to be processed; starting a motor (11) to enable the insulator to be processed to axially rotate along with the motor until all umbrella discs and sheaths of the insulator to be processed are uniformly coated with paint;

starting the lifting device (14): starting a power supply controller on the electric screw lifting platform, starting a speed-regulating variable-frequency motor to work, driving a commutator, driving 4 screw lifters by the commutator through a connecting rod, simultaneously descending the 4 screw lifters in a linkage way, and lowering a coating groove (6) to a designated position, wherein all umbrella discs of an insulator to be processed leave the coating groove (6) liquid at the moment;

the rotating speed of the motor (11) is adjusted to be 200-300 r/min, the motor (11) is started to enable the insulator to be processed to axially rotate along with the motor until all umbrella discs and sheaths of the insulator are evenly thrown away the redundant coating, the coating thrown out of the coating groove falls into a liquid accumulation groove, and the insulator is taken down and sent to the next working procedure.

2. A special apparatus for a method of dip coating a composite insulator according to claim 1, wherein: a driven end base (1) and a power end base (12) are arranged on the platform base (4); a driven end assembly (2) is arranged on the driven end base (1), and a ball head adapter (2-7) for fixing a ball head end fitting of an insulator to be processed is arranged on the driven end assembly (2); the ball head adapter (2-7) is arranged on the bearing seat (2-3) through a tapered roller bearing (2-4); a motor (11) is arranged on the power end base (12), and the motor (11) is connected with a ball socket adapter joint (8) for fixing a ball socket end fitting of an insulator to be processed through a variable coupler (9); the ball head adapter (2-7) is arranged opposite to the ball socket adapter (8); a coating groove (6) is arranged between the ball head adapter (2-7) and the ball socket adapter (8), and a lifting device for driving the coating groove (6) to lift is arranged at the lower end of the coating groove (6).

3. The special equipment for the method for preparing the composite insulator by dip coating according to claim 2, wherein: the central axes of the ball head adapter joint (2-7) and the ball socket adapter joint (8) are in a straight line with the central axis of the insulator (13) to be processed, the motor (11) and the central axis of the coupler (9).

4. The special equipment for the method for preparing the composite insulator by dip coating according to claim 2, wherein: the driven end assembly (2) further comprises a base bottom plate (2-1), the bearing seat (2-3) is arranged on the base bottom plate (2-1) through a nut (2-2), and the ball head adapter (2-7) is arranged on the bearing seat (2-3) through a tapered roller bearing (2-4).

5. The special equipment for the method for preparing the composite insulator by dip coating according to claim 2, wherein: an axial hole (2-8) is formed in one end of the ball head adapter (2-7), and the axial hole (2-8) is communicated with an inner cavity (2-9) of the ball head adapter (2-7); the bulb end fitting (13-1) of the insulator (13) to be processed is provided with a shaft lever, the end head of the shaft lever is provided with a fitting head, the fitting head is a round end head, the diameter of the fitting head is smaller than the inner cavity (2-9) of the bulb adapter and larger than the axial hole (2-8) of the bulb adapter; the side end of the ball head adapter (2-7) is provided with a radial open slot (2-10), and the radial open slot (2-10) is communicated with the axial hole (2-8) and the internal cavity (2-9); the groove width of the radial open groove (2-10) communicated with the axial hole (2-8) is larger than the shaft rod diameter of the insulator ball end fitting (13-1) to be processed, the groove width of the radial open groove (2-10) communicated with the inner cavity is larger than the fitting head diameter of the insulator ball end fitting (13-1) to be processed, and the groove height of the radial open groove (2-10) communicated with the inner cavity (2-9) is larger than the fitting head thickness of the insulator ball end fitting (13-1) to be processed.

6. The special equipment for the method for preparing the composite insulator by dip coating according to claim 2, wherein: the inner cavity of the ball head adapter (2-7) is provided with a radial through pin hole (2-11) for inserting a first R pin.

7. The special equipment for the method for preparing the composite insulator by dip coating according to claim 2, wherein: the end of the ball-and-socket adapter (8) is provided with a concave groove (8-1) with a side opening, a half ball head (8-2) is arranged in the concave groove, the central axis of the half ball head (8-2) and the central axis of the ball-and-socket adapter (8) are on the same straight line, and the half ball head (8-2) is connected with the concave groove (8-1) and the ball-and-socket adapter through a ball-and-socket adapter baffle (8-3); the insulator ball socket end fitting (13-2) to be processed is provided with a ball socket end fitting axial hole (13-3), and the ball socket end fitting axial hole (13-3) is communicated with the inner cavity (13-4) of the ball socket end fitting; an open slot is formed in the side end of the ball socket end fitting (13-2) of the insulator to be processed, and the open slot is communicated with the axial hole (13-3) of the ball socket end fitting and the inner cavity (13-4) of the ball socket end fitting; the width of the groove at the position where the open groove is communicated with the axial hole (13-3) of the ball socket end fitting is larger than the width of the ball socket adapter baffle (8-3), the width of the groove at the position where the open groove is communicated with the inner cavity (13-4) of the ball socket end fitting is larger than the diameter of the half ball head (8-2), and the height of the groove at the position where the open groove is communicated with the inner cavity (13-4) of the ball socket end fitting is larger than the radius of the half ball head (8-2).

8. The special equipment for the method for preparing the composite insulator by dip coating according to claim 2, wherein: the inner cavity (13-4) of the ball socket end fitting is provided with a ball socket end fitting adapter pin hole (13-5) for inserting a second R pin.

9. The special equipment for the method for preparing the composite insulator by dip coating according to claim 2, wherein: the lifting device is an electric screw lifting platform, the electric screw lifting platform comprises a power supply controller, a speed-regulating variable-frequency motor and a commutator on the electric screw lifting platform, a connecting rod, the speed-regulating variable-frequency motor is in transmission connection with the commutator and the connecting rod, and the connecting rod is in transmission connection with a coating groove (6) through 4 screw lifters.