Tap-changer static contact assembly tooling

Abstract

The present invention provides a static contact assembly tooling for a tap changer, comprising: a base; a positioning block fixed on the base; a perforation is formed between the positioning block and the base for an insulating rod to penetrate in and out in the left-right direction, and a receiving groove for receiving the static contact is provided on the positioning block. The receiving groove is a U-shaped receiving groove with an opening facing left or right, and the receiving groove is a through groove that penetrates up and down. The receiving groove includes two spaced side walls and an arc-shaped transition wall. The arc-shaped transition wall contacts the static contact, and the space formed between the two side walls constitutes an exit space for the static contact to exit the positioning block after being press-fitted. The length of the receiving groove in the up-down direction is less than the length of the static contact, and the difference between the two constitutes the press-fitting depth of the static contact. The upper end surface of the positioning block constitutes a limiting surface that is in limiting cooperation with the force application mechanism to limit the press-fitting degree of the static contact. Beneficial effects: The tooling is used to position the insulating rod and the static contact and cooperate with the force application mechanism, which can reduce the labor intensity of workers, ensure the press-fitting accuracy, and facilitate the press-fitting operation.

Description

Technical Field

[0001] The present invention relates to an assembly tool for static contacts of a tap changer. Background Art

[0002] The off-circuit tap changer is one of the core components of a transformer and plays a role in regulating the high-voltage side voltage and connecting the high-voltage lead wire in the overall structure of the transformer. For example, an off-circuit strip tap changer disclosed in a Chinese utility model patent with the authorization announcement number CN205723180U includes a bracket and an operating mechanism. An insulating rod and a rack are fixed on the bracket. A plurality of moving contacts are arranged on the rack, and a plurality of static contacts are arranged on the insulating rod. The moving contacts and the static contacts are in series or parallel contact in each phase.

[0003] When the static contacts of the above tap changer are installed on the insulating rod, since there is an interference fit between the static contacts and the insulating rod, manual press-fitting is very difficult, the labor intensity is relatively high, and the static contacts after press-fitting are uneven. Even some static contacts will be scratched, and the product quality cannot be guaranteed. Summary of the Invention

[0004] The purpose of the present invention is to provide an assembly tool for static contacts of a tap changer that facilitates the installation of the static contacts of the tap changer on the insulating rod.

[0005] To achieve the above purpose, the assembly tool for static contacts of a tap changer in the present invention adopts the following technical solutions:

[0006] The assembly tool for static contacts of a tap changer includes:

[0007] A base for supporting the insulating rod of the tap changer;

[0008] A positioning block fixed on the base;

[0009] Wherein, a perforation is formed between the positioning block and the base for the insulating rod to penetrate in and out in the left-right direction. The positioning block is provided with a receiving groove for accommodating the static contacts of the tap changer and guiding the press-fitting process. The receiving groove is a U-shaped receiving groove with the notch facing left or right. At the same time, the receiving groove is a through groove that penetrates up and down and is located above the perforation to communicate with the perforation. The receiving groove includes spaced side walls and arc-shaped transition walls connected to the two side walls. The arc-shaped transition walls are used to contact the static contacts. The space between the two side walls forms an exit space for the static contacts to exit the positioning block after press-fitting. The length of the receiving groove in the up-down direction is less than the length of the static contacts, so that the difference between the two constitutes the press-fitting depth of the static contacts. The upper end surface of the positioning block constitutes a limiting surface for limiting the press-fitting degree of the static contacts in limit cooperation with the force-applying mechanism.

[0010] The beneficial effects of the technical solution of the above tap-changer static contact assembly tooling are as follows: The perforation between the positioning block and the base can allow the insulating rod to pass through in the left-right direction. The accommodating groove provided on the positioning block can facilitate the placement of the static contact, and the accommodating groove is a U-shaped accommodating groove with the notch facing left or right, and is also a through-channel that penetrates up and down and communicates with the perforation below. In this way, the static contact placed in the accommodating groove can correspond to the static contact mounting hole on the insulating rod, thus facilitating the pressing of the static contact onto the insulating rod. During pressing, the insulating rod can be inserted into the perforation, and then the static contact is placed in the accommodating groove. During the pressing process, the static contact is guided by the arc transition wall of the accommodating groove. After pressing, the exit space between the two side walls of the accommodating groove can just allow the static contact to exit the positioning block, thus completing the pressing of one static contact. Next, by analogy, the pressing of each static contact can be completed. In addition, the pressing depth of the static contact is determined by the length of the accommodating groove in the up-down direction, and the upper end face of the positioning block constitutes a limiting surface that is limitedly matched with the force-applying mechanism. In this way, when the force-applying mechanism touches the upper end face of the positioning block, the static contact cannot be pressed down further. Therefore, by reasonably setting the size of the positioning block, the pressing accuracy can be ensured.

[0011] The present invention uses an assembly tooling to position the insulating rod and the static contact. By cooperating the assembly tooling with the force-applying mechanism, the manual labor intensity can be reduced, and the pressing accuracy can be ensured, facilitating the pressing operation.

[0012] Further, in order to meet the pressing operation of products where the static contact penetrates the insulating rod, an avoidance groove for avoiding the lower end of the static contact is provided on the base. The avoidance groove is located below the perforation and communicates with the perforation. The left end or the right end of the avoidance groove is open, so that the pressed static contact can exit the base.

[0013] Further, in order to facilitate the replacement of the positioning block to adapt to the assembly of insulating rods and static contacts of different models, the positioning block is detachably connected to the base.

[0014] Further, in order to optimize the overall structure, reduce the weight of the tooling, and facilitate the movement of workers, the perforation is formed by a through-groove provided on the positioning block and the upper end face of the base. Description of the Drawings

[0015] Figure 1 is a perspective view of the tap-changer static contact assembly tooling of the present invention before pressing the static contact;

[0016] Figure 2 is a perspective view of the tap-changer static contact assembly tooling of the present invention after pressing the static contact;

[0017] Figure 3 is a front view of the tap-changer static contact assembly tooling of the present invention after pressing the static contact;

[0018] Figure 4 This is a side view of the static contact assembly tooling for the tap changer in the present invention after the static contact is press-fitted.

[0019] Figure 5 This is a structural diagram of the cooperation between the insulating rod and the static contact of the static contact assembly tooling for the tap changer in the present invention after a part of the static contacts are press-fitted.

[0020] In the figure: 1. Base; 11. Avoidance groove; 2. Insulating rod; 21. Static contact mounting hole; 3. Positioning block; 31. Through groove; 32. Receiving groove; 4. Static contact. Detailed implementation manner

[0021] Embodiment 1 of the static contact assembly tooling for the tap changer in the present invention is as Figures 1 to 4 shown, including a base 1 extending in the left-right direction. The upper end surface of the base 1 is used to support the insulating rod 2 of the tap changer. The insulating rod 2 is a square insulating rod and also extends in the left-right direction. A plurality of static contact mounting holes 21 for mounting the static contacts 4 are arranged thereon at intervals.

[0022] A positioning block 3 is fixed to the right end of the base 1 by bolts (not shown in the figure). The right end surface of the positioning block 3 is flush with the right end surface of the base 1. A through groove 31 for the insulating rod 2 to pass through from the right side is provided on the bottom surface of the positioning block 3 facing the base 1. Therefore, the through groove 31 is a through groove penetrating left and right. The shape of the through groove 31 matches the shape of the insulating rod 2, and its groove depth is equal to the thickness of the insulating rod 2. The through groove 31 and the upper end surface of the base 1 together form a through hole for the insulating rod 2 to pass through.

[0023] The positioning block 3 is also provided with a receiving groove 32 for receiving the static contact 4 and guiding its press-fitting process. The receiving groove 32 is a through groove penetrating up and down and is located above the through groove 31. Therefore, the receiving groove 32 is communicated with the through groove 31. At the same time, the receiving groove 32 is also a U-shaped receiving groove with the groove opening facing right. In this way, after the static contact 4 is press-fitted, the static contact 4 can be conveniently moved to the right to withdraw from the positioning block 3. Specifically, the receiving groove 32 includes spaced side walls and arc-shaped transition walls connected to the two side walls. The arc-shaped transition walls are used to contact the static contact 4 and guide its press-fitting process. The space between the two side walls forms an exit space for the static contact 4 to withdraw from the positioning block after being press-fitted. Of course, when placing the static contact 4, the static contact 4 can also be loaded into the receiving groove 32 from the right side through the exit space.

[0024] The base 1 is provided with an escape groove 11 for evading the lower end of the static contact 4. The escape groove 11 is located below the through hole and is connected to the through hole. The escape groove can be suitable for assembling products in which the static contact passes through the insulating rod. Specifically, the escape groove 11 in this embodiment is a through groove that passes through the left and right sides. This can facilitate the static contact 4 to exit the base 1 from the right side after press-fitting. On the other hand, the longer through groove can also play a role in reducing weight.

[0025] For a fixed length of the static contact 4, its press-fitting depth is determined by the length of the receiving groove 32 in the vertical direction, or in other words, by the height of the positioning block 3. Of course, the length of the receiving groove 32 in the vertical direction is smaller than the length of the static contact 4. After the static contact 4 is placed in the receiving groove 32, its upper end is exposed to the positioning block 3, such as Figure 1 The length difference between the accommodating groove 32 and the static contact 4 is the press-fit depth of the static contact 4, and the upper end surface of the positioning block 3 constitutes a limit surface for cooperating with the force-applying mechanism to limit the press-fit degree of the static contact 4, that is, when the force-applying mechanism contacts the upper end surface of the positioning block 3, the static contact 4 cannot be pressed downward any further, so the press-fit accuracy can be ensured by reasonably setting the size of the positioning block.

[0026] The use principle of the static contact assembly tool of the tap changer in the present invention is:

[0027] When in use, using a riveting machine as a force-applying mechanism can reduce the intensity of manual labor. The specific steps are: when installing the first static contact 4 at the end, the insulating rod 2 can be inserted from left to right or from right to left into the through hole surrounded by the positioning block 3 and the base 1, so that the static contact mounting hole at the end is aligned with the receiving groove 32, and then the static contact 4 is installed into the receiving groove 32 from top to bottom or from right to left, and the static contact 4 is in contact with the arc-shaped transition wall of the receiving groove 32, and at the same time, the bottom end of the static contact 4 is aligned with the static contact mounting hole. Then place the entire tooling on the riveting machine, operate the riveting machine, and make the pressure plate of the riveting machine press the static contact 4 downward until the pressure plate hits the upper end surface of the positioning block 3, indicating that the static contact has been pressed. Next, move the insulating rod 2 to the right, so that the first static contact withdraws from the receiving groove 32 and the avoidance groove 11, and align the second static contact mounting hole with the receiving groove 32, install the second static contact, and repeat the above steps. Figure 5 As shown in the figure, each static contact is pressed onto the insulating rod until all static contacts are pressed. Finally, the insulating rod is moved to the right and removed from the tooling. The whole process is very convenient to operate, greatly reducing the labor intensity, and improving the pressing efficiency and pressing accuracy. At the same time, the quality of the product is also effectively guaranteed.

[0028] Since the positioning block 3 is detachably connected to the base 1 by bolts, by replacing the positioning block (different positioning blocks have different sizes of the through grooves and / or the receiving grooves), it is possible to assemble different types of insulating rods and static contacts, which is very convenient to use. Therefore, the width of the avoidance groove 11 on the base 1 is set relatively large, larger than the width of the receiving groove 32 in this embodiment, so that even if the positioning block is replaced and the width of the receiving groove becomes larger (the outer diameter of the corresponding static contact becomes larger), there is no need to replace the base.

[0029] In addition, in this embodiment, the through-groove on the positioning block and the upper end surface of the base are used to form a through-hole. Compared with setting the through-groove on both the positioning block and the base, or setting the through-groove only on the base, this can reduce the weight of the base, and then reduce the weight of the entire tooling, thereby facilitating manual movement.

[0030] In other embodiments of the tap changer static contact assembly tool, a press may also be used as the force applying mechanism.

[0031] In other embodiments of the tap changer static contact assembly tool, half of the through groove may be provided on the positioning block and the base respectively, and the two may be matched to form a through hole; of course, the through groove may also be provided only on the base, in which case the lower end surface of the positioning block and the through groove on the base together form a through hole.

[0032] In other embodiments of the tap changer static contact assembly tool, the positioning block may also be fixed at the left end or middle of the base, and the notch of the accommodating groove on the positioning block may also face leftward, in which case the insulating rod must be moved leftward to exit the tool.

[0033] In other embodiments of the tap changer static contact assembly tool, the positioning block can also be detachably connected to the base by a buckle, or fixed to the base by magnet attraction; of course, the positioning block can also be welded and fixed to the base and cannot be removed.

[0034] In other embodiments of the tap changer static contact assembly tool, the avoidance groove on the base may not be through-through. For example, in the first embodiment, it only needs to be open at the right end to facilitate the static contact to exit the base from the right side.

[0035] In other embodiments of the tap changer static contact assembly tool, when the notch of the accommodating groove faces left, the left end of the avoidance groove is open, so as to facilitate the static contact to move leftward and exit the base.

[0036] In other embodiments of the tap changer static contact assembly tool, for products where the static contact does not penetrate the insulating rod, the avoidance groove on the base can be omitted.

Claims

1. Tap changer static contact assembly tooling, characterized in that, Comprising: A base for supporting the insulating rod of the tap changer; A positioning block fixed on the base; Wherein, a perforation for the insulating rod to penetrate in and out in the left-right direction is formed between the positioning block and the base. An accommodating groove for accommodating the static contact of the tap changer and guiding its pressing process is provided on the positioning block. The accommodating groove is a U-shaped accommodating groove with an opening facing left or right. At the same time, the accommodating groove is a through groove that penetrates up and down and is located above the perforation to communicate with the perforation. The accommodating groove includes two spaced side walls and an arc transition wall connected to the two side walls. The arc transition wall is used to contact the static contact. The space between the two side walls forms an exit space for the static contact to exit the positioning block after being pressed. The length of the accommodating groove in the up-down direction is less than the length of the static contact, so that the difference between the two constitutes the pressing depth of the static contact. The upper end face of the positioning block constitutes a limiting surface for limiting the pressing depth of the static contact in limit cooperation with the force application mechanism.

2. The tap changer static contact assembly tooling according to claim 1, characterized in that, An avoidance groove for avoiding the lower end of the static contact is provided on the base. The avoidance groove is located below the perforation and communicates with the perforation. The left end or the right end of the avoidance groove is open, so that the static contact after pressing can exit the base.

3. The tap changer static contact assembly tooling according to claim 1 or 2, characterized in that, The positioning block is detachably connected to the base.

4. The tap changer static contact assembly tooling according to claim 3, characterized in that, The perforation is formed by a through groove provided on the positioning block and the upper end face of the base.

5. The tap changer static contact assembly tooling according to claim 1 or 2, characterized in that, The perforation is formed by a through groove provided on the positioning block and the upper end face of the base.

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