A machining fixture for the internal support plate of the conductive tube of a GW6 type disconnector

Abstract

The present invention discloses a machining fixture for supporting a pad inside a conductive tube of a GW6 type disconnector, comprising: a positioning mechanism, comprising a rotating body and a positioning platform, wherein at least one side of the rotating body is a plane, a limit platform is provided at the head end of the plane, and the positioning platform is arranged at the lower side of the plane, and the plane, the limit platform and the positioning platform constitute the positioning reference plane of the pad; a clamping mechanism, comprising at least one top clamping plate and at least two outer plane clamping devices, wherein the top clamping plate is detachably mounted on the top of the rotating body for clamping the upper side of the pad, and the two outer plane clamping devices are respectively arranged at the head and tail ends of the rotating body for clamping the outer plane of the pad. The use of this fixture to process the pad greatly improves the processing efficiency, greatly improves the surface roughness of the processing, and makes the pad more tightly connected when it fits with the inner wall of the conductive tube, and finally makes the anti-electromagnetic interference performance and loop resistance parameters of the GW6 type disconnector better.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage switch production equipment, and in particular to a machining fixture for an internal support pad of a conductive tube of a GW6 type isolating switch. Background Art

[0002] With the rapid development of power systems, the requirements for power grid safety, reliability, and performance of electrical switchgear are constantly increasing. The control of key quality points of high-voltage disconnectors directly affects the safe operation of the entire power grid. The electromagnetic anti-interference ability of disconnectors and their loop resistance are two important quality parameters.

[0003] At present, the electromagnetic anti-interference ability and loop resistance parameters of high-voltage disconnectors usually depend on the reliability of each connection point of the conductive loop and the surface roughness level of the outer surface of the conductive loop. The electromagnetic anti-interference ability and loop resistance parameters of the GW6 switch on the conductive tube basically depend on the surface roughness level of the conductive tube and the surface roughness level of the internal pad. At the same time, the size of the gap in the bolt connection between the conductive tube and the pad also affects the two major parameters. Since the GW6 conductive tube must be extruded to form the installation surface, the pad must be able to adapt to the inner wall of the conductive tube after extrusion, so that it can fit closely with the inner wall of the conductive tube. The existing processing technology is to use a machining center to mill the four long sides of the aluminum bar into rounded corners through a rounded milling cutter, so as to achieve the effect of being able to fit into the inner wall of the conductive tube.

[0004] The existing processing technology is an acceptable process when the fillet of the pad is small, that is, it can be processed into a fillet at one time by a certain size of fillet milling cutter. However, for the conductive tube of the GW6 type disconnector, a relatively large fillet is required. The preliminary design requires at least R50 to meet the minimum requirement.

[0005] In order to achieve this effect, there are currently two methods. One is to use a small fillet milling cutter to gradually process the R50 fillet. This method is time-consuming and labor-intensive, and the surface roughness of the processed surface is relatively poor. Another idea is to directly use an R50 fillet milling cutter for direct processing, but the R50 fillet milling cutter is already a special specification milling cutter, which is rarely in demand in the market. The cost of customizing the milling cutter is high, and even if an R50 fillet milling cutter is purchased, due to the problem of single cutting volume, it is also impossible to process too much at one time. Compared with the previous existing process, the final surface roughness is relatively better, but these two methods cannot solve the problems of processing difficulties, time-consuming and labor-intensive, requiring processing personnel to have high processing experience, and the high cost of processing parts by the machining center. In the current market context, this is a serious production waste and cost increase. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a machining fixture for the internal support pad of the conductive tube of the GW6 type disconnector, which can solve the problem of the difficulty in machining the internal support pad of the conductive tube of the GW6 type disconnector.

[0007] The technical solution adopted in the embodiment of the present invention is: a machining fixture for supporting the inner support plate of the conductive tube of a GW6 type disconnector, comprising:

[0008] The positioning mechanism comprises a rotating body and a positioning platform, wherein at least one side of the rotating body is a positioning plane, a limiting platform is provided at the head end of the positioning plane, and the positioning platform is provided at the lower side of the positioning plane, and the positioning plane, the limiting platform and the positioning platform constitute a positioning reference plane of the pad;

[0009] The clamping mechanism includes at least one top pressure plate and at least two outer plane clamping devices. The top pressure plate is detachably installed on the top of the rotating body to clamp the upper side of the pad. The two outer plane clamping devices are respectively arranged at the head and tail ends of the rotating body to clamp the outer plane of the pad.

[0010] The machined fixture for supporting the pad inside the conductive tube of the GW6 type disconnector according to the embodiment of the present invention has at least the following beneficial effects: the machined fixture of the present application is used to clamp the pad, and the previous milling machine processing is changed to lathe processing. Due to the characteristics of lathe processing, the processing efficiency is greatly improved, and due to the use of lathe processing, the surface roughness is greatly improved, and through calculation, the arc is processed as large as possible, so that the pad is more tightly connected to the inner wall of the conductive tube when it is fitted, and at the same time, the problem of the intersection of the bolt through hole and the arc surface of the pad of the original scheme is solved, which ultimately makes the anti-electromagnetic interference performance and loop resistance parameters of the GW6 type disconnector better, and the product performance is more reliable.

[0011] According to some embodiments of the present invention, a plurality of fixing holes for the outer plane clamping device are provided at the tail end of the positioning plane, the distances between the fixing holes and the limiting platform are different, and the outer plane clamping device is detachably installed at the fixing holes.

[0012] According to some embodiments of the present invention, the outer plane clamping device includes a pad, a pressure block and a fixing bolt. The pad is installed at the fixing hole, one end of the pressure block overlaps the pad, and the other end is used to press the pad. The fixing bolt passes through the pressure block and is fixed to the positioning plane to press the pressure block against the outer plane of the pad.

[0013] According to some embodiments of the present invention, an auxiliary positioning plate is further included, and the auxiliary positioning plate can be placed on the positioning platform to raise the positioning platform.

[0014] According to some embodiments of the present invention, the rotating body includes two positioning planes, and the two positioning planes are arranged opposite to each other on two side surfaces of the rotating body.

[0015] According to some embodiments of the present invention, an auxiliary positioning plate is further included. The auxiliary positioning plate can be placed on the positioning platform to raise the positioning platform. The auxiliary positioning plate is in the shape of a "door", and the width of the slot of the auxiliary positioning plate is equal to the width of the rotating body.

[0016] According to some embodiments of the present invention, a plurality of mounting holes are provided on the top of the rotating body along the length direction of the rotating body, and connecting bolts are provided on the top pressure plate, and the connecting bolts can be screwed into the mounting holes.

[0017] According to some embodiments of the present invention, two outer ends of the top pressure plate extend outward to press the upper sides of the pads on the two positioning planes.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is an assembly of a machined fixture for supporting a pad inside a conductive tube of a GW6 type disconnector according to an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of a rotating body;

[0022] Figure 3 A schematic diagram of the structure of the auxiliary positioning plate;

[0023] Figure 4 It is a schematic diagram of the working state structure of the supporting pad inside the conductive tube of the GW6 type disconnector.

[0024] Reference numerals:

[0025] Rotating body 110, positioning platform 120, positioning plane 111, limiting platform 112, mounting hole 113, pad 200;

[0026] Top pressing plate 310 , connecting bolts 311 , outer plane pressing device 320 , cushion block 321 , pressing block 322 , fixing bolts 323 .

[0027] Fixing hole 400 , auxiliary positioning plate 500 , and card slot 510 . DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] Reference Figure 1 and Figure 4 The machined fixture for supporting the inner support plate of the conductive tube of the GW6 type disconnector of the present application is shown and described, comprising:

[0034] The positioning mechanism includes a rotating body 110 and a positioning platform 120. At least one side of the rotating body 110 is a positioning plane 111. A limiting platform 112 is provided at the head end of the positioning plane 111. The positioning platform 120 is provided at the lower side of the positioning plane 111. The positioning plane 111, the limiting platform 112 and the positioning platform 120 constitute a positioning reference plane of the pad 200.

[0035] The clamping mechanism includes at least one top pressure plate 310 and at least two outer plane clamping devices 320. The top pressure plate 310 is detachably installed on the top of the rotating body 110 to clamp the upper side of the pad 200. The two outer plane clamping devices 320 are respectively arranged at the head and tail ends of the rotating body 110 to clamp the outer plane of the pad 200.

[0036] Specifically, Figure 1 and Figure 2 As shown, when in use, one end of the rotating body 110 is placed in the three-jaw chuck of the lathe, and the other end is connected to the top of the lathe through the center hole, and the three-jaw chuck is locked. The raw material aluminum block of the pad 200 is placed in the positioning reference surface of the tooling, and the positioning reference surface is composed of the positioning plane 111, the limit platform 112 and the positioning platform 120. The freedom of the pad 200 is fully restricted to complete the positioning of the pad 200.

[0037] Subsequently, the two outer plane clamping devices 320 are used to clamp the backing plate 200 at both ends, and the top clamping plate 310 is used to clamp the top side of the backing plate 200. The workpiece is then processed by a lathe, and each processing will directly process two arc surfaces on the long side of the backing plate 200. After the single-sided processing is completed, the workpiece is turned over and the positioning and clamping processing is performed according to the original steps, and the processing of the backing plate 200 is completed.

[0038] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, a plurality of fixing holes 400 of the external plane clamping device 320 are provided at the tail end of the positioning plane 111, and the distances between the fixing holes 400 and the limiting platform 112 are different, and the external plane clamping device 320 can be detachably installed at the fixing holes 400.

[0039] The backing plate 200 has various lengths and models, such as Figure 4 In the clamping process of the pad 200, the fixing hole 400 of the outer plane clamping device 320 at the tail end of the positioning plane 111 can be selected according to the length of the pad 200, so as to meet the needs of pads 200 of different lengths and improve the versatility of the clamp.

[0040] Furthermore, the outer plane clamping device 320 includes a cushion block 321, a pressure block 322 and a fixing bolt 323. The cushion block 321 is installed at the fixing hole position 400. One end of the pressure block 322 is overlapped on the cushion block 321, and the other end is used to press the pad 200. The fixing bolt 323 passes through the pressure block 322 and is fixedly connected to the positioning plane 111 to press the pressure block 322 against the outer plane of the pad 200.

[0041] During the installation of the outer plane clamping device 320, the pad 321 is first installed at the corresponding fixing hole 400 by means of the hexagon socket screw. Then, the two ends of the clamping block 322 are overlapped on the pad 200 and the pad 321 respectively, and then the clamping block 322 is fixed to the positioning plane 111 by means of the fixing bolts 323. During the tightening process of the fixing bolts 323, the clamping block 322 can be pressed against the outer plane of the pad 200 to clamp the pad 200. The head end of the pad 200 can be clamped by means of the same operation.

[0042] In some embodiments of the present invention, an auxiliary positioning plate 500 is further included. The auxiliary positioning plate 500 can be placed on the positioning platform 120 to raise the positioning platform 120 .

[0043] Due to the particularity of the pad 200, there are two different appearances, one is without a water guide groove, and the other is with a water guide groove. The presence or absence of a water guide groove directly affects the raw material width of the workpiece. The width is an important positioning reference for the fixture of this application, so auxiliary positioning is required to achieve compatibility with different widths.

[0044] Specific as Figure 3 and Figure 4 As shown, when the processed pad 200 is a small width model, the auxiliary positioning plate 500 can be placed on the positioning platform 120 to increase the height of the positioning platform 120 to compensate for the insufficient width of the processed pad 200, so that the top pressure plate 310 can press the upper side of the pad 200, thereby improving the compatibility performance of the clamp.

[0045] In some embodiments of the present invention, the rotating body 110 includes two positioning planes 111 , and the two positioning planes 111 are arranged on two side surfaces of the rotating body 110 opposite to each other.

[0046] like Figure 4 As shown, in the present application, the two positioning planes 111 of the rotating body 110 can clamp a raw material aluminum block of a pad 200, and each time the lathe processes, four arc surfaces will be directly processed in one process. The processing efficiency can be doubled. After adopting the clamp proposed in the present invention, the lathe only needs to process and clamp two pads 200 twice, which is equivalent to one process and one clamping to complete a workpiece. The processing difficulty is greatly reduced, and the total processing time is shortened to 3-4 minutes / workpiece. The processing efficiency of the fillet milling cutter and the secondary clamping make the total processing time as long as 30-40 minutes / workpiece, and the overall efficiency is directly improved by nearly 10 times.

[0047] Furthermore, it also includes an auxiliary positioning plate 500, which can be placed on the positioning platform 120 to raise the positioning platform 120. The auxiliary positioning plate 500 is in the shape of a "door", and the width of the slot 510 of the auxiliary positioning plate 500 is equal to the width of the rotating body 110.

[0048] The structure of the auxiliary positioning plate 500 is optimized. The auxiliary positioning plate 500 is in the shape of a "door" and can be placed on the positioning platform 120 under the two positioning planes 111 at the same time. Moreover, the groove structure can be clamped together with the rotating body 110 to improve the stability of the auxiliary positioning plate 500.

[0049] In some embodiments of the present invention, a plurality of mounting holes 113 are provided at the top of the rotating body 110 along the length direction of the rotating body 110 , and a connecting bolt 311 is provided on the top pressure plate 310 , and the connecting bolt 311 can be screwed into the mounting hole 113 .

[0050] The top pressing plate 310 can be installed at any mounting hole 113 by connecting bolts 311, which can meet the pressing requirements of different lengths of the pad 200. At the same time, a pair of top pressing plates 310 can also be set at the same time to press the pad 200 more firmly.

[0051] Furthermore, the two outer ends of the top pressing plate 310 extend outward to press the upper sides of the pads 200 on the two positioning planes 111. The top pressing plate 310 can simultaneously press the pads 200 on both sides, optimizing the structure of the clamp. Of course, each top pressing plate 310 can also be made in a way that one end extends out, but this will increase the number of top pressing plates 310. If the pads 200 are set on the two positioning planes 111 at the same time, at least two groups of top pressing plates 310 need to be set, while the present design only needs one group to meet the pressing needs of the two pads 200.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0053] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A machining fixture for supporting the inner support plate of the conductive tube of a GW6 type disconnector, characterized in that: include: The positioning mechanism comprises a rotating body (110) and a positioning platform (120), wherein at least one side of the rotating body (110) is a positioning plane (111), a limiting platform (112) is provided at the head end of the positioning plane (111), and the positioning platform (120) is provided at the lower side of the positioning plane (111), and the positioning plane (111), the limiting platform (112) and the positioning platform (120) constitute a positioning reference plane of the pad (200); The clamping mechanism comprises at least one top clamping plate (310) and at least two outer plane clamping devices (320), wherein the top clamping plate (310) is detachably mounted on the top of the rotating body (110) for clamping the upper side of the pad (200), and the two outer plane clamping devices (320) are respectively arranged at the head and tail ends of the rotating body (110) for clamping the outer plane of the pad (200); An auxiliary positioning plate (500) can be placed on the positioning platform (120) to raise the positioning platform (120), the auxiliary positioning plate (500) is in the shape of a "door", and the width of the slot (510) of the auxiliary positioning plate (500) is equal to the width of the rotating body (110).

2. The machining fixture for the internal support plate of the conductive tube of the GW6 type disconnector according to claim 1 is characterized in that: The tail end of the positioning plane (111) is provided with a plurality of fixing holes (400) of the outer plane clamping device (320), the distances between the fixing holes (400) and the limiting platform (112) are different, and the outer plane clamping device (320) is detachably installed at the fixing holes (400).

3. The machining fixture for the internal support plate of the conductive tube of the GW6 type disconnector according to claim 2 is characterized in that: The outer plane clamping device (320) includes a cushion block (321), a pressure block (322) and a fixing bolt (323); the cushion block (321) is installed at the fixing hole (400); one end of the pressure block (322) is overlapped on the cushion block (321), and the other end is used to press the pad (200); the fixing bolt (323) passes through the pressure block (322) and is fixedly connected to the positioning plane (111) to press the pressure block (322) against the outer plane of the pad (200).

4. The machining fixture for the internal support plate of the conductive tube of the GW6 type disconnector according to any one of claims 1 to 3, characterized in that: It also comprises an auxiliary positioning plate (500), and the auxiliary positioning plate (500) can be placed on the positioning platform (120) to raise the positioning platform (120).

5. The machining fixture for the internal support plate of the conductive tube of the GW6 type disconnector according to any one of claim 4, characterized in that: The rotating body (110) comprises two positioning planes (111), and the two positioning planes (111) are arranged opposite to each other on two side surfaces of the rotating body (110).

6. The machining fixture for the internal support plate of the conductive tube of the GW6 type disconnector according to claim 5 is characterized in that: The top of the rotating body (110) is provided with a plurality of mounting holes (113) along the length direction of the rotating body (110), and the top pressure plate (310) is provided with connecting bolts (311), and the connecting bolts (311) can be screwed with the mounting holes (113).

7. The machining fixture for the internal support plate of the conductive tube of the GW6 type disconnector according to claim 6 is characterized by: The two outer ends of the top pressing plate (310) extend outwards to press the upper sides of the pads (200) on the two positioning planes (111).

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