WO2014048068A1 - Main electrically conductive tube of megavolt disconnector and manufacturing method thereof - Google Patents

Abstract

Disclosed are a main electrically conductive tube of a megavolt disconnector and a manufacturing method thereof. The main electrically conductive tube of a megavolt disconnector is composed of a mandrel (3), and a first conductor and a second conductor at two ends of the mandrel, which are welded coaxially, and main welding tubes (10) and main welding sleeves (11) fitting with each other in a plug-sleeve manner are arranged at the two ends of the mandrel and at corresponding welding positions of the first conductor and the second conductor to the mandrel, wherein the main welding sleeves are provided with a main plunger welding hole, and the main welding tubes are welded and fitted with the main welding sleeves via the main plunger welding holes. The main electrically conductive tube of a megavolt disconnector is long, and is manufactured by machining in segments and then welding and assembling, reducing equipment dependence and meeting the high-precision machining requirement for parts of a component.

Description

 Million volt isolation switch main conductive tube and manufacturing method thereof

 [0001] The present invention relates to the field of millions of volt isolation barrier devices, and more particularly to a one-million-volt isolation master conductive tube and a method of fabricating the same.

Background technique

 [0002] With the continuous development and expansion of the national electricity market, high-voltage and high-current power transmission and transformation products have become the leading products in the power market, and the demand for the one-million-volt series products has been increasing. The quality of the main conductive tube welding determines the performance of the whole product, and plays an important role in the opening and closing. For example, the straightness is out of tolerance, which makes the knife gate unable to reach the predetermined position accurately, which makes the closing difficult and affects the normal grid power supply. , bringing greater difficulties to on-site debugging. At present, the conductive tubes of the products below 5.5 million volts generally use the whole conductive tube, and the upper part is added with the upper and lower splints for fixing, but the full length of the one-volt isolation switch conductive tube reaches 13 meters, which has exceeded the length of the existing raw materials by 6 meters, and the outer diameter. Φ 185 mm, weight 195 kg, the parts are used harshly, the overall straightness requirement is less than or equal to 5 mm, and there are angle requirements between the five planes. There are two outer circles in the middle part to be processed, and the coaxiality requirements are relatively high. Strict, the existing main conductive rod production method is not suitable for the main conductive tube of the one-million-isolation switch.

Summary of the invention

 [0003] An object of the present invention is to provide a method for manufacturing a main conductive tube of a million-volt isolation switch and an assembly structure of the main conductive tube, which can solve the problem that the prior art cannot process a million-volt isolation conductive with a large length. The problem with the tube.

[0004] In order to achieve the above object, the conductive tube solution of the present invention is: a one-million-volt isolation switch main conductive tube, which is formed by coaxial welding of a first conductor and a second conductor at both ends of the mandrel and the mandrel, the core A main welded pipe and a main welded bushing with a plug sleeve are disposed at two ends of the shaft and the corresponding welding portion of the first conductor, the second conductor and the mandrel, and the main welding sleeve is provided with a main plunger welding hole, The welded pipe and the main welded bushing are welded and matched by the main plunger welding hole.

 [0005] The first conductor and the second conductor are respectively coaxially welded by two connecting rods, and the welding joint between the connecting rod and the corresponding connecting rod is respectively provided with a sub-welding tube and a sub-welding sleeve which are matched by a socket, The auxiliary welding sleeve is provided with a secondary plunger welding hole, and the auxiliary welding tube and the secondary welding sleeve are welded and matched by the secondary plunger welding hole.

 [0006] The first conductor and the second conductor are both equipped with a main finger and an auxiliary finger, and the mandrel is worn on the mandrel.

 [0007] The method of the present invention is: a method for manufacturing a main conductive tube of a detachment switch, the steps are as follows: 1) manufacturing a first conductor, a second conductor and a mandrel; at both ends of the mandrel and the first conductor, a connecting end of the second conductor and the mandrel is formed with a main welded pipe and a main welded bushing for mating welding, and a main plunger welding hole is formed on the main welded bushing; 2) the first conductor, the mandrel, the first The two conductors are welded together and assembled.

 [0008] The first conductor and the second conductor are fabricated as follows: First, two connecting rods are manufactured, and then respectively connected in two

1

Confirmation One end of the post is machined with a sub-welded tube and a sub-welded sleeve for inserting the sleeve, a secondary plunger is formed on the sub-welded sleeve, and finally the two connecting rods are passed through the sub-welded tube and the sub-joint Pipe socket, welding.

 [0009] The invention adopts the segment processing, and then the welding assembly method to manufacture the conductive tube with large length, overcomes the current situation that the raw material cannot be purchased, and solves the high-precision processing requirement of the part, and reduces the dependence on the device. High-precision machining of parts is possible without the need for very large equipment. After the segmentation processing is completed, it is combined, welded, polished and surface treated to ensure the strength and shape tolerance of the parts, so that the overall straightness, position and roughness of the parts meet the requirements for use. The installation and commissioning of Wanfu isolation products bring great convenience.

[0010] The conductors at both ends of the mandrel are manufactured by a segmented machining method, and the accuracy of the parts is improved.

DRAWINGS

 1 is a structural view of a main conductive tube of the present invention;

Figure 2 - Figure 6: Various cross-sectional views in Figure 1;

Figure 7: Mandrel structure diagram;

Figure 8: Sectional view in Figure 7;

Figure 9: First conductor structure diagram;

Figure 10: Sectional view in Figure 9;

Figure 11: Structure diagram of the first connecting rod;

Figure 12 - Figure 13: Sectional views in Figure 11;

Figure 14: Structure diagram of the second connecting rod;

Figure 15 is an exploded view showing the implementation process of Embodiment 2 of the present invention;

Figure 16: An exploded view of the implementation of Embodiment 1;

Figure 17: Schematic diagram of a single pole isolation switch;

Figure 18: Overall assembly drawing of the conductive tube.

detailed description

 [0012] The present invention will be further described in detail below with reference to the accompanying drawings.

[0013] Conductive tube embodiment 1

A one-million-volt isolation switch main conductive tube is formed by coaxial welding of a first conductor and a second conductor at both ends of a mandrel and a mandrel, and both ends of the mandrel and corresponding welding of the first conductor and the second conductor and the mandrel The main welded pipe and the main splicing sleeve are matched with a socket, and the main welding ferrule is provided with a main plunger welding hole.

[0014] Conductive tube manufacturing method embodiment 1

Figure 16, a method for manufacturing a main conductive tube of a one-million-volt isolation switch, the steps are as follows: 1) manufacturing a first conductor, a second conductor Machining separately from the mandrel; machining the main welded pipe and the main welded bushing for the mating welding at both ends of the mandrel and the connecting end of the first conductor, the second conductor and the mandrel, on the main welded bushing The main plunger is welded; 2) The first conductor, the mandrel and the second conductor are welded together and assembled.

[0015] Conductive tube embodiment 2

As shown in FIG. 1 to FIG. 15, a main conductive tube of a one-million-volt isolating switch, the first mandrel of the mandrel 3 and the two ends of the mandrel are coaxially welded with the second conductor, the two ends of the mandrel and the first conductor, The corresponding welding portion of the two conductors and the mandrel 3 is provided with a main welded pipe 10 and a main welded bushing 1 which are fitted with a plug sleeve, and the main welded bushing 11 is provided with a main plunger welding hole.

 [0016] The first conductor and the second conductor are each formed by coaxial welding of two connecting rods. Taking the first conductor as an example, the first connecting rod 1 and the second connecting rod 2 are included, and the welded joint between the two connecting rods is respectively provided with a socket-fitted auxiliary nipple 20 and a secondary welded sleeve 21, and the secondary welded sleeve 21 is provided with a secondary plunger welding hole.

[0017] Conductive tube manufacturing method embodiment 2

A method for manufacturing a main conductive tube of a one-million-volt isolation switch, the steps are as follows: 1) manufacturing a mandrel, two connecting rods of a first conductor, and two connecting rods of a second conductor; as shown in Fig. 7, at both ends of the mandrel 3 Machining the main welded pipe 10; as shown in Fig. 11, the first connecting rod 1 of the first conductor is machined with the sub-welded pipe 20 at one end, the second connecting rod 2 of the first conductor is the end-processed sub-welded bushing 21, and the other end is processed by the main welded bushing Tube 11, the main welding sleeve 11 and the secondary welding sleeve 21 are processed with the plunger welding hole; the second conductor is the same; 2) the tooling is used to weld the connecting rod to form the first conductor and the second conductor to ensure straightness Within 2 mm; 3) Final assembly from bottom to top, the first conductor, mandrel 3, and second conductor are assembled and placed on the welding platform. The welding platform has been corrected by the electronic image level, and the height difference is not More than 0.1 mm. At this time, the angle relationship of the plane position of the above three parts should be considered. When riveting, use the angle ruler to check. When welding, adjust the height of the V-shaped iron to ensure that the center and the two ends are at the same height, and the upper and lower errors are less than 1 mm. After riveting, rotate 90 degrees, measure the height of the center and both ends, control the height difference within 1 mm, and then weld it to control the overall straightness within 3 mm. Finally, the welded parts are corrected and the appearance is polished. The above "rive" --- the term is commonly used in welding, refers to the scribing on the parts that need to be welded before welding, or the positioning of the welded parts with the tooling, and the correction of some easily deformable parts. Then, the parts to be welded are aligned and butt welded (only a few local positioning points are welded), and a process of measuring the position after spot welding is performed. For riveted parts, it is not necessary to measure the dimensions when welding. Workers engaged in riveting are called riveters.

 [0018] FIG. 17 is a general assembly diagram of a single pole isolation switch. The center of the main conductive tube is rotatably assembled on the middle of the porcelain column, and is in the illustrated position when the switch is closed. From opening to closing, the conductive tube rotates in the middle of the vertical porcelain bottle in the horizontal plane, and is converted to a flipping motion along the center of the conductive tube when it is closed.

[0019] Figure 18 is the total assembly of the conductive tube, shown in the closing state, at this time the main finger is in the working state, the auxiliary finger has been Get rid of the effect. As shown in FIG. 1, the main contact mounting surface 101 at both ends of the main conductive tube is used to mount the main contact 406, and the auxiliary finger mounting surface 102 is used to mount the auxiliary contact 407. In Fig. 7, the mounting plane 301 on the mandrel is used to mount the ball and socket joint 410 and the buffer spring system 412, and the positions of the 101, 102, 301 are related to the opening and closing. The main finger 406 and the auxiliary finger 407 are in a "convex" shape and are fixed to the mounting surface by bolts 402. The main contact and the auxiliary contact are electrically coupled to the static contacts on the porcelain posts at both ends of FIG. 17 when they are closed. The equalizing ring 408 is installed at both ends of the mandrel; the shielding ring 401 is installed at both ends of the main conductive tube; the casing 414 is worn on the mandrel, and the fitting portion is provided with a sleeve 409; the supporting blocks 411, 413 are respectively mounted on the buffer spring system 412 , spherical joint 410 and between the mandrel.

Claims

WO 2014/048068 Claim PCT/CN2013/001166 A one-million-volt isolation switch main conductive tube, characterized in that a first conductor and a second conductor are coaxially welded by a mandrel and a mandrel, and both ends of the mandrel and the first conductor, a corresponding welded joint of the two conductors and the mandrel is provided with a main welded pipe and a main welded bushing, and the main welded bushing is provided with a main plunger welding hole, and the main welded pipe and the main welded bushing pass through the main column The soldering holes are welded and matched.  2 . The one-million-volt isolation switch main conductive tube according to claim 1 , wherein the first conductor and the second conductor are both coaxially welded by two connecting rods, and the connecting rod and the corresponding connection are connected. The splicing joints between the rods are respectively provided with a sub-welding tube and a sub-welding sleeve which are matched with a sleeve, the sub-solder sleeve is provided with a sub-plunger welding hole, and the sub-welded tube and the sub-welded sleeve are passed through the sub-column The plug weld holes are mated.  3. The ferrule-volt barrier isolation main conductive tube according to claim 2, wherein the first conductor and the second conductor are both equipped with a main contact finger and an auxiliary contact finger, on the mandrel Wear the box.  A method for manufacturing a main conductive tube of a one-million-volt isolation switch, characterized in that the steps are as follows: 1) manufacturing a first conductor, a second conductor and a mandrel; at both ends of the mandrel and the first conductor and the second conductor The main welded pipe and the main welded bushing for the mating welding are processed at the connecting end of the mandrel, and the main plunger welding hole is arranged on the main welded bushing; 2) the first conductor, the mandrel and the second conductor are twisted Pick up, the final assembly.  The method for manufacturing a one-million-volt isolation switch main conductive tube according to claim 4, wherein the manufacturing process of the first conductor and the second conductor is as follows: First, two connecting rods are manufactured, and then respectively connected in two One end of the rod is machined with a sub-welded tube and a sub-welding sleeve for inserting the sleeve, a secondary plunger is formed on the sub-welded sleeve, and finally the two connecting rods are inserted through the sub-welded tube and the sub-welded sleeve Set, welding.