CN105185626B - Special device for replacing HGIS isolation switch buffer - Google Patents

Abstract

The invention discloses a special device for replacing an HGIS isolation switch buffer. The special device comprises an isolation switch transmission device and a double-cushion-block clamping part, wherein the isolation switch transmission device comprises two connecting rods, a balance spring and a triangular connecting lever, the two connecting rods are connected by virtue of the triangular connecting lever, the triangular connecting lever is connected to the balance spring, the double-cushion-block clamping part is arranged between the triangular connecting lever and the balance spring, the double-cushion-block clamping part comprises two supporting plates and two connection bolts, the bolt hole is formed in each supporting plate, the connection bolts penetrate through the bolt holes, the bolt holes are formed in two ends of each supporting plate, each supporting plate is an insulation rectangular block, and a groove is formed in each supporting plate. The special device is convenient to carry, detachable and capable of solving the problems that the overhaul time is too long when the personnel enter a gas chamber to work, also has a function of saving the manpower and material resources and improves the working efficiency.

Description

HGIS isolating switch buffer replacement special equipment

Technical field:

The invention relates to a replacement device, in particular to a special equipment for replacing buffers of HGIS isolation switches.

Background technique:

The 1000kV UHV Nanyang Substation is the UHV AC substation with the largest construction scale and the most advanced technology in the world so far. It involves the safety of cross-regional power grids and has an important position in the system. The 1000kV UHV test demonstration project connects the two major regions of the North China Power Grid and the Central China Power Grid The power grid, as an important cross-regional energy transmission channel in my country, is of great significance for long-term safe and stable operation. As the main equipment of UHV system, 1000kV HGIS equipment plays a very important role.

Since the moving contact of the 1000kV disconnector adopts a vertical operation mode, the flow capacity reaches 8000A, and the size and weight of the moving contact are relatively large. The load varies greatly. In order to overcome the above problems, a moving contact balancing device is adopted. The dynamic and static contacts of the 1000kV disconnector are complex in structure and heavy in weight. For reliable operation, the movable and static contacts of the disconnector are supported by insulators. Due to the heavy weight of the moving contact, the opening and closing requires a lot of energy. In order to avoid equipment damage, the electric spring operating mechanism needs to put the buffer into the buffer when the spring energy is released. The buffer is composed of piston, aviation hydraulic oil, tank body, oil injection hole and so on. However, since it was put into operation, there is a big gap with western developed countries in terms of equipment manufacturing and other aspects. The hundreds of years of industrial development in the West cannot be surpassed by decades. Due to reasons such as buffer machining, manufacturing process level, technical strength, and product structure, 1000kV HGIS disconnecting switch equipment has repeatedly experienced oil leakage defects in buffers. Safe and stable operation brings great hidden dangers. After the buffer oil leaks, if it is not replaced in time, it will not be able to buffer the large energy released by the isolating switch spring operating mechanism. During operation, it will cause damage to the internal structure of the HGIS isolating switch. If it is powered on, it may cause 1000kV HGIS isolating switch. Vicious consequences such as equipment flashover, explosion, tripping, and UHV system outage. It will have a great impact on UHV equipment and even the operation mode of the national interconnected grid system, and will lose a large amount of load, causing great economic losses.

According to the vertical operation mode of the moving contact of the isolating switch, no matter whether the isolating switch is in the opening position or the closing position, sufficient force is required to tighten the moving contact during the replacement of defective components, so that the opening and closing speed and time , the itinerary cannot undergo slight changes. In order to ensure that the speed, time and stroke remain unchanged, the replacement of key parts of the traditional mechanism box is handled by a conservative method of entering the inside of the gas chamber, which seriously affects the maintenance period. The main performance is: 1. SF6 gas is recycled, the pressure of adjacent gas chambers is halved, and various complicated processes such as tests affect the utilization rate of SF6 and are not conducive to environmental protection; 2. It requires a lot of tools and materials; 3. It takes a long time for maintenance. Normally, at least It takes up to 6 days (144 hours) for continuous repairs overnight. If it is rainy or snowy or the air humidity exceeds 80%, the corresponding work cannot be carried out on site, and the working hours will need to be postponed according to the weather conditions, with great uncertainty .

Invention content:

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a simple structure, easy to carry, can be disassembled, solve the problem of too long maintenance time when personnel enter the gas chamber, and also have the function of saving manpower and material resources. HGIS isolation switch buffer replacement special equipment.

The technical solution of the present invention is: a special equipment for replacing the buffer of an HGIS isolation switch, including a double spacer clamp, the double spacer clamp is arranged on the isolation switch transmission device, and the double spacer clamp includes a support plate and connecting bolts, the support plate is provided with bolt holes, the number of the bolt holes is two, the support plate is two, the connecting bolts pass through the bolt holes, the isolation switch transmission device includes a connecting rod, a balance The spring and the triangular crank arm, the connecting rods are two, the two connecting rods are connected by the triangular crank arm, the triangular crank arm is connected with the balance spring, and the support plate is arranged between the triangular crank arm and the balance spring , the one connecting rod is connected with the transmission output shaft of the mechanism box, and the other connecting rod is connected with the transmission input shaft of the isolation switch.

The bolt holes are arranged at both ends of the support plate, the support plate is an insulating rectangular block, there are two connecting bolts, and grooves are arranged on the support plate.

The beneficial effects of the present invention are:

1. The invention is easy to carry, can be disassembled, and solves the problem of too long maintenance time when personnel enter the air chamber to work. It also has the function of saving manpower and material resources and improving work efficiency.

2. The present invention fixes the balance spring of the connecting rod of the isolating switch and positions and locks the external mechanism of the isolating switch, which can ensure that the position of the dynamic and static contacts of the isolating switch remains unchanged during the replacement process, and can ensure the opening and closing speed of the 1000kV HGIS isolating switch, The time and the itinerary are unchanged, the replacement efficiency is improved, the power outage time is reduced, and the reliability of the UHV system is improved.

3. According to the special structure of the 1000kV isolating switch in the present invention, when the isolating switch is in the opening position after a power failure, double spacer clips are used between the triangular crank arm and the balance spring to prevent the body contacts from sinking due to their own weight and lock the 1000kV isolating switch to move. The position of the contact has no influence on the inside of the air chamber, so it can be replaced without personnel entering the air chamber.

4. The present invention can modify the size through the cutting equipment, which can meet the situation of different connecting rods between the triangular crank arm and the balance spring, and the support plate is provided with grooves, which can improve the stability of the fixation and facilitate the operation of personnel .

Description of drawings:

Figure 1 is a schematic diagram of the structure of the special equipment for HGIS isolating switch buffer replacement.

Figure 2 is a schematic diagram of the structure of the special equipment for HGIS isolating switch buffer replacement.

detailed description:

Embodiment: See Figure 1 and Figure 2, in the figure, 1-support plate, 2-connecting bolt, 3-groove, 4-connecting rod, 5-balance spring, 6-triangular crank arm, 8-transmission output of mechanism box Shaft, 9-disconnector drive input shaft.

Special equipment for HGIS isolating switch buffer replacement, including double spacer clamps, which are set on the isolating switch transmission device, double spacer clamps include support plate 1 and connecting bolts, and support plate 1 is provided with bolt holes , there are two bolt holes, there are two support plates 1, and the connecting bolt 2 passes through the bolt holes. The rod 4 is connected by the triangular crank arm 6, the triangular crank arm 6 is connected with the balance spring 5, the support plate 1 is arranged between the triangular crank arm 6 and the balance spring 5, one connecting rod 4 is connected with the transmission output shaft 8 of the mechanism box, and the other The connecting rod 4 is connected with the transmission input shaft 9 of the isolation switch.

Bolt holes are arranged at both ends of the support plate 1 , the support plate 1 is an insulating rectangular block, two connecting bolts 2 are provided, and the support plate 1 is provided with a groove 3 .

When in use, personnel make double spacer clips of appropriate size according to the connecting rods between the triangular crank arm 6 and the balance spring 5 in different isolating switches. Between the springs, use the connecting bolt 2 to pass through the bolt hole on the support plate 1, and fix the position of the connecting rod between the triangular crank arm 6 and the balance spring 5 and the position of the triangular crank arm through the nut on the connecting bolt 2. Carry out maintenance, when maintenance is finished, the personnel pulls out the connecting bolt 2 in the bolt hole, takes out support plate 1.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to within the scope of the technical solutions of the present invention.

Claims (2)

1. A special equipment for HGIS isolating switch buffer replacement, including double spacer clamps, characterized in that: the double spacer clamps are arranged on the isolation switch transmission, and the double spacer clamps include support plates and Connecting bolts, the support plate is provided with bolt holes, the number of bolt holes is two, the support plate is two, the connecting bolts pass through the bolt holes, the isolation switch transmission device includes a connecting rod, a balance spring and the triangular crank arm, the connecting rods are two, the two connecting rods are connected by the triangular crank arm, the triangular crank arm is connected with the balance spring, and the support plate is arranged between the triangular crank arm and the balance spring. 2. The special equipment for replacing buffers of HGIS isolating switches according to claim 1, characterized in that: the bolt holes are arranged at both ends of the support plate, the support plate is an insulating rectangular block, and the connecting bolts are two , grooves are arranged on the support plate.