CN109727746B - Superconducting coil tensioning adjusting device in superconducting current limiter - Google Patents

Abstract

The invention discloses a superconducting coil tensioning and adjusting device in a superconducting current limiter. The device mainly includes a first layer of inner tightening bolts, a first layer of adjusting sliders, a column, a first layer of outer tightening bolts, Upper inner superconducting coil, upper outer superconducting coil, second layer adjusting slider, second layer outer jacking bolt, third layer outer jacking bolt, third layer adjusting slider, lower outer superconducting coil, lower inner Superconducting coil, the fourth layer is the outer jacking bolt, the fourth layer is adjusting the slider, the fourth layer is the inner jacking bolt, the third layer is the inner jacking bolt, and the second layer is the inner jacking bolt. The column 3 is a fixed structure. When the inner jacking bolt is tightened and the outer jacking bolt is loosened, it can drive the corresponding adjustment slider to move to the right. The adjustment slider contains an arc boss, and the superconducting coil is installed on the corresponding On the arc boss of the adjustment slider, the rightward movement of the adjustment slider can tension the corresponding superconducting coil.

Description

A superconducting coil tensioning device in a superconducting current limiter

technical field

The invention relates to the field of superconducting current limiters, in particular to a superconducting coil tensioning adjustment device in a superconducting current limiter.

Background technique

With the rapid development of the national economy, the demand for electricity continues to increase, the scale of the power grid continues to expand, and the fault current exceeds the breaking capacity of the existing circuit breaker, which will seriously endanger the related electrical equipment in the system. In order to ensure the safe and reliable operation of the system, it is necessary to quickly Remove fault current. In order to limit the short-circuit current to a controllable level, the concept of superconducting current limiters has been proposed for a long time. However, since low-temperature superconductors operate at the temperature of liquid helium, the operating cost is high and the low-temperature system is large, so it cannot be commercialized. After the discovery of high-temperature superconducting materials in 1986, superconducting current limiter technology was put on the agenda again. According to the forecast of the international high-temperature superconducting power application development roadmap, high-temperature superconducting current limiters and superconducting cables are the first superconducting power equipment to enter the market, and it is expected to be commercialized by 2025.

The superconducting current limiter device generally contains multiple layers of parallel superconducting coils. During the installation and use process, it is easy to cause the inconsistent tension of each coil due to the inconsistent length of each layer of coils, which seriously affects the stability of the system operation. Therefore, the problem of tension adjustment of superconducting coils has always been a major obstacle to the commercial operation of high-temperature superconducting current limiters, so the design of its tension adjustment device is a very critical technology.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a superconducting coil tensioning adjustment device in a superconducting current limiter. During the installation process, a pre-tightening force can be applied to each layer of superconducting coils respectively, and the tension of each layer of coils can be adjusted respectively. Therefore, the problem of inconsistent tension of each coil caused by the inconsistent length of each layer of coils is avoided.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A superconducting coil tensioning and adjusting device in a superconducting current limiter is characterized in that: it includes a column, and the column is sleeved with a first layer of adjustment sliders, a second layer of adjustment sliders, a first layer of adjustment sliders, and a second layer of adjustment sliders in sequence from top to bottom. Three layers of adjustment sliders and a fourth layer of adjustment sliders, the first, second, third and fourth layers of adjustment sliders all include slider bodies, and the center of the slider body is provided with a mounting set outside the column The inner and outer sides of the slider body are provided with inner and outer bolt holes respectively leading to the installation port, and the inner and outer threaded holes are screwed with top bolts, and the inner ends of the top bolts are against each other. At the corresponding part of the column; the bottom surfaces of the first and third slider bodies are provided with large-diameter arc bosses surrounding the outer side of the column, and the top surfaces of the second and fourth slider bodies are provided with a large-diameter arc boss surrounding the column. A small diameter arc boss on the outside; the bottom surface of the first slider body and the top surface of the second slider body are aligned, and the large diameter arc boss of the first slider body is located at the small diameter of the second slider body. On the outer side of the arc boss, the bottom surface of the third slider body and the top surface of the fourth slider body meet, and the large-diameter arc boss of the third slider body is located on the small-diameter arc of the fourth slider body The outer side of the boss; superconducting coils are fixedly wound around the arc bosses of the first, second, third and fourth layers of adjustment sliders.

The superconducting coil tensioning adjustment device in the superconducting current limiter is characterized in that: the inner and outer threaded holes of the first slider body are respectively screwed with a first layer of inner and outer tightening bolts ; The inner and outer threaded holes of the second slider body are respectively screwed with the second layer of inner and outer top bolts; the inner and outer threaded holes of the third slider body are respectively screwed with the third layer of inner and outer tops The inner and outer threaded holes of the fourth slider body are respectively screwed with the inner and outer tightening bolts of the fourth layer.

The superconducting coil tensioning adjustment device in a superconducting current limiter is characterized in that: the first layer of outer jacking bolts and the fourth layer of outer jacking bolts are countersunk bolts.

The superconducting coil tensioning adjustment device in the superconducting current limiter is characterized in that: the upper outer superconducting coil is fixedly wound outside the large-diameter arc boss of the first slider body; The upper inner superconducting coil is installed outside the small diameter arc boss of the second slider body; the lower outer superconducting coil is fixedly wound outside the large diameter arc boss of the third slider body; The lower inner superconducting coil is installed outside the small-diameter arc boss of the fourth slider body.

The superconducting coil tensioning adjustment device in a superconducting current limiter is characterized in that: the outer end faces of the first, second, third and fourth adjusting sliders are all provided with liquid nitrogen grooves.

The advantages of the present invention are:

The present invention is a superconducting coil tensioning and adjusting device in a superconducting current limiter. The superconducting current limiter device generally contains multiple layers of parallel superconducting coils. During installation and use, it is easy to cause problems due to inconsistent lengths of each layer of coils. The present invention solves the above problems well, and has low manufacturing cost, convenient installation, and high commercial value.

Description of drawings

FIG. 1 is a schematic cross-sectional view of the structure of the present invention.

Figure 2 is a schematic structural diagram of the present invention.

Figure 3 is a schematic structural diagram of a single adjustment slider.

Among them, the symbols in the figure: 1- the first layer inner top bolt, 2- the first layer adjusting slider, 3- column, 4- the first layer outer top bolt, 5- upper inner superconducting coil, 6- upper Outer superconducting coil, 7- second layer adjusting slider, 8- second layer outer jacking bolt, 9- third layer outer jacking bolt, 10- third layer adjusting slider, 11- lower outer superconducting coil , 12-lower inner superconducting coil, 13-the fourth layer of outer jacking bolts, 14-the fourth layer of adjusting sliders, 15-the fourth layer of inner jacking bolts, 16-the third layer of inner jacking bolts, 17- Tighten the bolts in the second layer.

Detailed ways

As shown in Figures 1 and 2. A superconducting coil tensioning and adjusting device in a superconducting current limiter, the device mainly includes a first layer of inner tightening bolts, a first layer of adjusting sliders, a column, a first layer of outer tightening bolts, and an upper and inner superconducting coil , the upper outer superconducting coil, the second layer adjusting slider, the second layer outer jacking bolt, the third layer outer jacking bolt, the third layer adjusting slider, the lower outer superconducting coil, the lower inner superconducting coil, the third layer Four layers of outer jacking bolts, the fourth layer of adjusting sliders, the fourth layer of inner jacking bolts, the third layer of inner jacking bolts, and the second layer of inner jacking bolts. The adjusting slider is fixed on the column, and can be slid left and right along the column by adjusting the corresponding bolts. The first layer of outer jacking bolts and the fourth layer of outer jacking bolts are countersunk head bolts. As shown in Fig. 3, the adjusting slider has a circular arc boss and a liquid nitrogen tank structure.

The column 3 is fixed, the arc boss of the fourth layer adjusting slider 14 faces upwards, and is fixed on the column 3 by the outer tightening bolts 13 of the fourth layer and the inner tightening bolts 15 of the fourth layer, and the inner superconducting coil is lowered. 12 is installed on the arc boss 18 of the fourth layer adjusting slider 14, which is the fourth layer structure; Above, it is fixed on the upright column 3 by the third layer outer tightening bolt 9 and the third layer inner tightening bolt 16, and the lower outer superconducting coil 11 is installed on the arc boss of the third layer adjusting slider 10, which is The third-layer structure; the second-layer adjusting slider 7 has the arc boss facing upward, is installed on the third-layer adjusting slider 10, and is fixed by the second-layer outer tightening bolts 8 and the second-layer inner tightening bolts 17 On the column 3, the upper inner superconducting coil 5 is installed on the arc boss of the second layer adjusting slider 7, which is the second layer structure; the first layer adjusting slider 2 has the arc boss facing down and is installed on the The top of the second-layer adjusting slider 7 is fixed on the column 3 by the first-layer inner tightening bolt 1 and the first-layer outer tightening bolt 4, and the upper outer superconducting coil 6 is installed on the first layer of the adjusting slider 2 On the arc boss, it is the first layer structure; the 4 sets of adjustment sliders are respectively designed with arc bosses, the 4 layers of superconducting coils are respectively fixed on the 4 sets of adjustment sliders, and the 4 sets of adjustment sliders are designed with liquid nitrogen The groove 19 structure enables the 4-layer superconducting coil to fully contact the cooling liquid.

The column 3 is a fixed structure. When the inner tightening bolt 15 of the fourth layer is tightened and the outer tightening bolt 13 of the fourth layer is loosened, the fourth layer adjusting slider 14 can be driven to move to the right, and the fourth layer adjusting slider 14 can be moved to the right. The block 14 contains a circular arc boss, and the lower inner superconducting coil 12 is installed on the circular arc boss of the fourth layer adjusting slider 14. The rightward movement of the fourth layer adjusting slider 14 can tension the lower inner superconducting coil 12.

When the inner tightening bolt 16 of the third layer is tightened and the outer tightening bolt 9 of the third layer is loosened, the third layer adjusting slider 10 can be driven to move to the right. The third layer adjusting slider 10 has an arc boss. The lower outer superconducting coil 11 is installed on the arc boss of the third layer adjusting slider 10 , and the rightward movement of the third layer adjusting slider 10 can tension the lower outer superconducting coil 11 .

When the inner tightening bolt 17 of the second layer is tightened and the outer tightening bolt 8 of the second layer is loosened, the second layer adjusting slider 7 can be driven to move to the right, and the second layer adjusting slider 7 contains an arc boss. The upper inner superconducting coil 5 is installed on the arc boss of the second layer adjusting slider 7 , and the rightward movement of the second layer adjusting slider 7 can tension the upper inner superconducting coil 5 .

When the first layer of inner jacking bolt 1 is tightened and the first layer of outer jacking bolt 4 is loosened, the first layer of adjustment slider 2 can be driven to move to the right, and the first layer of adjustment slider 2 contains an arc boss. The upper outer superconducting coil 6 is installed on the arc boss of the first layer adjusting slider 2 , and the rightward movement of the first layer adjusting slider 2 can tension the upper outer superconducting coil 6 .

Claims (5)

1. a superconducting coil tensioning adjustment device in a superconducting current limiter, is characterized in that: comprise a column, and the column is sleeved with first layer adjusting slider, second layer adjusting slider successively from top to bottom , The third layer of adjustment sliders and the fourth layer of adjustment sliders, the first, second, third and fourth layers of adjustment sliders all include slider bodies, and the center of the slider body is sleeved outside the column. The inner and outer sides of the slider body are provided with inner and outer bolt holes respectively leading to the installation port, and the inner and outer threaded holes are screwed with a jacking bolt, and the inner end of the jacking bolt is The bottom surfaces of the first layer of adjustment sliders and the third layer of adjustment sliders are both provided with large-diameter arc bosses surrounding the outside of the column, and the second layer of adjustment sliders and the fourth layer of The top surfaces of the adjustment sliders are all provided with small-diameter circular arc bosses surrounding the outside of the upright column; the bottom surface of the first slider body and the top surface of the second slider body are aligned, and the large-diameter circular The arc boss is located on the outer side of the small-diameter arc boss of the second slider body, the bottom surface of the third slider body and the top surface of the fourth slider body meet, and the large-diameter arc convex of the third slider body The platform is located on the outer side of the small-diameter arc boss of the fourth slider body; superconducting coils are fixedly wound outside the arc bosses of the first, second, third and fourth layers of adjustment sliders. 2 . The superconducting coil tensioning adjustment device in a superconducting current limiter according to claim 1 , wherein the inner and outer threaded holes of the first slider body are respectively screwed with a first layer The inner and outer jacking bolts; the inner and outer threaded holes of the second slider body are respectively screwed with the second layer of inner and outer jacking bolts; the inner and outer threaded holes of the third slider body are respectively screwed with the first layer There are three layers of inner and outer tightening bolts; the inner and outer threaded holes of the fourth slider body are respectively screwed with the fourth layer of inner and outer tightening bolts. 3 . The superconducting coil tensioning adjustment device in a superconducting current limiter according to claim 2 , wherein the first layer of outer jacking bolts and the fourth layer of outer jacking bolts are countersunk bolts. 4 . 4. The superconducting coil tensioning adjustment device in a superconducting current limiter according to claim 3, characterized in that: the upper outer side is fixedly wound outside the large-diameter arc boss of the first slider body superconducting coil; the superconducting coil fixedly wound outside the small-diameter arc boss of the second slider body is the upper inner superconducting coil; the one fixedly wound outside the large-diameter arc boss of the third slider body is the lower outer side Superconducting coil; the lower inner superconducting coil is fixedly wound outside the small-diameter arc boss of the fourth slider body. 5 . The superconducting coil tensioning adjustment device in a superconducting current limiter according to claim 1 , wherein the outer end faces of the first, second, third and fourth layers of adjustment sliders are all uniform. 6 . Equipped with liquid nitrogen tank.

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