Improved tool special for transformer tapping copper nut welding

Abstract

The utility model discloses an improved transformer tapping copper nut welding special tool which comprises a base, a supporting rod and a plurality of welding platforms, the supporting rod is fixedly installed on the base in the vertical direction, all the welding platforms can move up and down and are rotatably arranged on the supporting rod, the welding platforms are perpendicular to the supporting rod, and the supporting rod is fixedly installed on the base. The welding device is characterized in that a nut positioning groove is formed in the upper surface of the outer portion of the welding platform, and an adjusting and pressing mechanism is arranged outside the welding platform. According to the special welding tool, the lead can be tightly pressed on the tapping copper nut in the welding process, it is guaranteed that the cold solder joint phenomenon does not occur, and the welding efficiency and quality are effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer manufacturing field especially relates to an improved transformer tapping copper nut welding special frock. BACKGROUND

[0002] In the field of intelligent manufacturing of transformers, as the core equipment of power transmission and distribution in the power system, the production quality of the transformer is directly related to the stable operation of the power network. As a key component of the transformer, the welding process of the tapping copper nut of the high-voltage coil is particularly important. The welding strength, conductivity and connection stability of the copper nut and the lead not only affect the insulation performance and short-circuit resistance of the high-voltage coil, but also have a decisive influence on the service life and safe operation of the whole transformer. At present, the industry still generally uses the traditional manual welding process which requires two people to cooperate for the welding operation of the tapping copper nut of the high-voltage coil. This process has been applied in the industry for many years, but with the development of transformer manufacturing technology towards high efficiency, precision and safety, its inherent drawbacks have gradually become prominent.

[0003] In response to this, a welding frame that can support and position the tapping copper nut and only requires one person to perform welding has appeared in the industry, such as a dry-type transformer coil tapping nut welding frame with the publication date of August 17, 2016 and the publication number of CN205464934U. The features of the welding frame are as follows: it includes a base, a column and a plurality of welding support plates; the column is vertically installed on the base; the welding support plates are connected to the column and arranged along the axial direction of the column; the column is a screw rod, and the welding support plates are connected to the column through threads. This welding frame can adjust the height of the tapping copper nut according to the coil tapping position in advance, and only one person is needed to operate during welding. However, since the welding support plates are connected to the column through threads, the height of the welding support plates needs to be adjusted by rotating on the column. Therefore, when the tapping copper nut is rotated to the corresponding angle with the lead in the horizontal plane, there may still be a slight gap between the tapping copper nut and the lead in the vertical direction. Since the worker needs to hold the welding equipment with one hand and the protective mask with the other hand, the worker cannot press the lead tightly on the tapping copper nut during welding, which may easily cause virtual welding of the tapping copper nut and the lead, affecting the product quality. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to provide an improved transformer tapping copper nut welding special frock. This welding special frock can press the lead tightly on the tapping copper nut during welding, ensuring that there is no virtual welding phenomenon and effectively improving the welding efficiency and quality.

[0005] In order to solve the above technical problems, the technical scheme adopted is as follows:

[0006] The utility model provides a special tool for welding of improved transformer tapping copper nut, which comprises a base, a support rod and a plurality of welding platforms, the support rod is fixedly installed on the base along the vertical direction, each welding platform is movably arranged on the support rod and can rotate, and the welding platform is perpendicular to the support rod, characterized in that: a nut positioning groove is formed on the outer upper surface of the welding platform, and an adjusting and pressing mechanism is arranged on the outer part of the welding platform.

[0007] In the special tool for welding, when the tapping copper nut welding operation of the high-voltage coil is carried out, first, each tapping copper nut is placed on the nut positioning groove of each welding platform; then, according to the welding height and angle requirements of each tapping copper nut, each welding platform is adjusted to the corresponding position one by one, so that the lead on the high-voltage coil can be in contact with the tapping copper nut; then, the lead is pressed on the tapping copper nut by adjusting the adjusting and pressing mechanism; finally, the staff can directly weld the tapping copper nut and the lead by using the welding equipment (such as a hydrogen-oxygen machine). The special tool for welding can fix the tapping copper nut, avoid displacement of the tapping copper nut during welding, press the lead on the tapping copper nut through the adjusting and pressing mechanism, eliminate the gap between the tapping copper nut and the lead caused by the adjustment of the welding platform, prevent false welding, and effectively improve the welding efficiency and quality.

[0008] The outer part is determined according to the position of the welding platform and the support rod, the position close to the support rod on the welding platform is the inner part, and the position far from the support rod is the outer part.

[0009] In the preferred embodiment, the adjusting and pressing mechanism comprises an adjusting rod and a pressing piece, the adjusting rod is movably arranged on the outer part of the welding platform, and the pressing piece is arranged on the adjusting rod. Before welding, the lead can be inserted into the gap between the pressing piece and the tapping copper nut, and then the position of the adjusting rod is adjusted up and down to press the lead by the pressing piece.

[0010] In the further preferred embodiment, a first screw hole is formed on the outer part of the welding platform in the up-down direction, the adjusting rod adopts a screw, the rod part of the screw is threadedly connected with the first screw hole, and a first through hole is formed on the pressing piece, the pressing piece is movably arranged on the screw through the first through hole. The height of the pressing piece is adjusted by the screw, and the head part of the screw presses the pressing piece, so as to press the lead on the tapping copper nut.

[0011] In the further preferred embodiment, the first through hole is formed on one end of the pressing piece, and the other end of the pressing piece is provided with a downward extending limiting hook. Generally, the adjusting rod avoids the position of the lead and the tapping copper nut, the pressing piece extends to the upper part of the lead from the side and presses the lead, and the limiting hook can avoid the lead from escaping from the side during welding.

[0012] In the preferred solution, each of the welding platforms is arranged on the support rod through a lifting and rotating member.

[0013] In the further preferred solution, the outer side wall of the support rod is provided with an external thread, the lifting and rotating member adopts a nut, the nut is threadedly connected with the support rod, and each of the welding platforms is fixedly connected with a corresponding nut.

[0014] In the further preferred solution, the base is provided with a second screw hole matched with the external thread, and the support rod is threadedly connected with the second screw hole of the base.

[0015] In the preferred solution, each of the welding platforms is a strip-shaped plate, the inner end of the strip-shaped plate is arranged on the support rod, and the nut positioning groove is arranged on the outer upper surface of the strip-shaped plate.

[0016] In the preferred solution, the base is further provided with a welding rod placing seat, a flux placing seat and a cooling water placing seat.

[0017] The welding special tool is convenient to operate, and the welding of the high-voltage coil lead wire and the tapping copper nut can be completed by one person. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a structural schematic view of a welding special tool according to the present application;

[0019] Figure 2 FIG. 2 is a structural schematic view of the welding special tool when used for welding according to the present application;

[0020] Figure 3The partial sectional view of the welding platform, the adjusting and pressing mechanism, the tapping copper nut and the lead wire in the welding of the embodiment of the utility model is shown in the figure;

[0021] Figure 4 The side view of the welding platform, the adjusting and pressing mechanism, the tapping copper nut and the lead wire in the welding of the embodiment of the utility model is shown in the figure. DETAILED DESCRIPTION

[0022] The utility model will be further described in connection with the drawings and specific embodiments:

[0023] As Figures 1-4 The utility model discloses a special tool for tapping copper nut welding of improved transformer, which comprises a base 1, a supporting rod 2 and a plurality of welding platforms 3, the supporting rod 2 is fixedly installed on the base 1 along the vertical direction, each welding platform 3 is movably and rotatably arranged on the supporting rod 2, and the welding platform 3 is perpendicular to the supporting rod 2; a nut positioning groove 301 is formed on the outer upper surface of the welding platform 3, and the outer portion of the welding platform 3 is provided with an adjusting and pressing mechanism 4.

[0024] In the special tool for welding, when the tapping copper nut 6 welding operation is carried out on the high-voltage coil 5, each tapping copper nut 6 is first placed on the nut positioning groove 301 of each welding platform 3; then according to the welding height and angle requirements of each tapping copper nut 6, each welding platform 3 is adjusted to the corresponding station one by one, so that the high-voltage coil 5 can contact the tapping copper nut 6; then the lead wire 501 is pressed on the tapping copper nut 6 by adjusting the adjusting and pressing mechanism 4; finally, the staff can directly weld the tapping copper nut 6 and the lead wire 501 by using the welding equipment 7 (such as hydrogen oxygen machine). The special tool for welding can fix the tapping copper nut 6, avoid displacement of the tapping copper nut 6 during welding, press the lead wire 501 on the tapping copper nut 6 through the adjusting and pressing mechanism 4, eliminate the gap between the tapping copper nut 6 and the lead wire 501 caused by the adjustment of the welding platform 3, prevent false welding, and effectively improve the welding efficiency and quality.

[0025] The outer portion is determined according to the positions of the welding platform 3 and the supporting rod 2, the position close to the supporting rod 2 on the welding platform 3 is the inner portion, and the position far away from the supporting rod 2 is the outer portion.

[0026] The adjusting and pressing mechanism 4 comprises an adjusting rod 401 and a pressing piece 402, the adjusting rod 401 is movably arranged on the outer portion of the welding platform 3, and the pressing piece 402 is arranged on the adjusting rod 401. Before welding, the lead wire can be stretched into the gap between the pressing piece 402 and the tapping copper nut 6, and then the position of the adjusting rod 401 is adjusted up and down, so that the pressing piece 402 presses the lead wire 501.

[0027] The welding platform 3 is externally provided with a first screw hole 302 arranged in the up-down direction, and the adjusting rod 401 is screwed with the first screw hole 302 by means of a screw whose rod part is screwed with the first screw hole 302; the pressing sheet 402 is provided with a first through hole, and the pressing sheet 402 is movably arranged on the screw through the first through hole. The pressing sheet 402 is adjusted in height by means of the screw, and the head part of the screw presses the pressing sheet 402, so as to press the lead wire 501 on the tapping copper nut 6.

[0028] The first through hole is arranged on one end of the pressing sheet 402, and the other end of the pressing sheet 402 is provided with a limiting hook 4021 extending downward. The adjusting rod 401 avoids the position of the lead wire 501 and the tapping copper nut 6, the pressing sheet 402 extends to above the lead wire 501 from the side and presses the lead wire 501, and the limiting hook 4021 can avoid the lead wire 501 from escaping from the side during welding.

[0029] Each welding platform 3 is arranged on the support rod 2 through a lifting rotating part 303. Each welding platform 3 adjusts the height and angle on the support rod 2 through the lifting rotating part 303.

[0030] The outer side wall of the support rod 2 is provided with an external thread, the lifting rotating part 303 is screwed with the support rod 2 by means of a nut, and each welding platform 3 is fixedly connected with the corresponding nut. During adjustment, only the nut needs to be rotated, so as to drive the welding platform 3 to be lifted or to be rotated by 360° around the support rod 2, so as to meet the requirements of different welding heights and angles; and after adjustment, no additional fixing part is needed to keep the position stable, and the cost is relatively low.

[0031] The base 1 is provided with a second screw hole matched with the external thread, and the support rod 2 is screwed with the second screw hole on the base 1. During installation, the support rod 2 is screwed into the second screw hole of the base 1 to complete the fixing, and during disassembly, the support rod 2 is separated by being reversely rotated, so as to facilitate the assembly, maintenance and storage of the tooling; meanwhile, the depth of the support rod 2 screwed in can be finely adjusted, so as to perform secondary calibration on the overall height and improve the adaptability of the tooling to different specifications of high-voltage coils 5.

[0032] Each welding platform 3 is a strip-shaped plate, the inner end of the strip-shaped plate is arranged on the support rod 2, and a nut positioning groove 301 is arranged on the outer upper surface of the strip-shaped plate. The narrow side of the strip-shaped plate can reduce the interference with other parts of the high-voltage coil 5, facilitate the accurate fitting of the lead wire 501 and the tapping copper nut 6, and improve the flexibility of the welding operation space.

[0033] The base 1 is further provided with a welding rod placing seat 101, a flux placing seat 102 and a cooling water placing seat 103. During welding operation, the silver-copper welding rod, the flux and the cooling water can be respectively placed in the corresponding placing seats, so that the external materials do not need to be frequently taken, and the overall welding efficiency is further improved.

Claims

1. An improved welding fixture for transformer tap changer copper nuts, comprising a base, a support rod, and multiple welding platforms, wherein the support rod is fixedly mounted on the base in a vertical direction, and each welding platform is movable up and down and rotatably mounted on the support rod, and the welding platform is perpendicular to the support rod, characterized in that: The outer upper surface of the welding platform is provided with nut positioning grooves, and the outer part of the welding platform is provided with an adjusting and pressing mechanism.

2. An improved special tool for welding of tap copper nut of transformer as claimed in claim 1 wherein: The adjusting and pressing mechanism comprises an adjusting rod and a pressing plate, the adjusting rod is movably arranged on the outer part of the welding platform, and the pressing plate is arranged on the adjusting rod.

3. The improved transformer tap changer copper nut welding fixture as described in claim 2, characterized in that: The outer part of the welding platform is provided with first screw holes arranged in the up-down direction, the adjusting rod is a screw, the rod part of the screw is in threaded connection with the first screw holes, the pressing plate is provided with a first through hole, and the pressing plate is movably arranged on the screw through the first through hole.

4. An improved special tool for welding of tap copper nut of transformer as claimed in claim 3 wherein: The first through hole is arranged on one end of the pressing plate, and the other end of the pressing plate is provided with a limiting hook extending downward.

5. The improved transformer tap changer copper nut welding fixture as described in claim 1, characterized in that: Each welding platform is arranged on a support rod through a lifting rotating part.

6. An improved special tool for welding of tap copper nut of transformer as claimed in claim 5 wherein: The outer side wall of the support rod is provided with external threads, the lifting rotating part is a nut, and the nut is in threaded connection with the support rod; and each welding platform is fixedly connected with a corresponding nut.

7. An improved special tool for welding of tap copper nut of transformer as claimed in claim 6 wherein: The base is provided with second screw holes matched with the external threads, and the support rod is in threaded connection with the second screw holes on the base.

8. An improved special tool for welding of tap copper nut of transformer as claimed in claim 1 wherein: Each welding platform is a strip-shaped plate, the inner end of the strip-shaped plate is arranged on the support rod, and the nut positioning grooves are arranged on the outer upper surface of the strip-shaped plate.

9. An improved transformer tap copper nut welding fixture as claimed in claim 1, wherein: The base is further provided with an electrode placing seat, a flux placing seat and a cooling water placing seat.

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