Processing part and processing method for manufacturing dielectric characteristic proportional unit of lightning arrester

Abstract

The present invention provides a workpiece and a processing method for making a dielectric characteristic ratio unit of a lightning arrester. The workpiece includes: an outer shell and a plurality of core units; wherein each core unit is arranged inside the outer shell, and each core unit is arranged in parallel and at intervals along the axial direction of the outer shell; a connecting screw is provided between any two adjacent core units, and its two ends are respectively connected to the two core units; both ends of the outer shell are provided with end screws, and each end screw is passed through the outer shell and connected to the core unit adjacent to the end screw. The present invention forms a processing core of the same size as the arrester core by forming a plurality of core units and a plurality of connecting screws arranged at intervals, and then uses the existing mold and processing technology of the arrester to make it; after the workpiece is made, the workpiece can be divided into a plurality of dielectric characteristic ratio units by cutting, without the need for independent mold opening, and can save the manufacturing cost of the dielectric characteristic ratio unit and improve the yield rate.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning arresters, and in particular to a processing part and a processing method for manufacturing a dielectric property proportional unit of a lightning arrester. Background Art

[0002] Currently, according to the requirements of my country's GB / T 11032-2020 "AC Gapless Metal Oxide Arrester" standard, a high-current impulse withstand test of the internal components of the arrester is proposed using a dielectric characteristic proportional unit as a test piece. This requires that the dielectric characteristic proportional unit of the arrester be heated to 60°C in an oven and a high-current impulse be applied to the test piece within 10 minutes of being removed from the oven to verify the internal insulation withstand capability of the arrester. The dielectric characteristic proportional unit only includes a resistor and can fully restore the dielectric properties of the material of the entire arrester. Its cross-sectional dimensions, materials, and internal structure should be consistent with the arrester. Current arrester manufacturers usually independently open molds and manufacture dielectric characteristic proportional units, which is too costly and has a low yield rate. Summary of the Invention

[0003] In view of this, the present invention proposes a processing part and a processing method for manufacturing a dielectric characteristic ratio unit of a lightning arrester, aiming to solve the problems of high cost and low yield of existing dielectric characteristic ratio units.

[0004] On the one hand, the present invention proposes a workpiece for making a dielectric property ratio unit of a lightning arrester, which comprises: an outer sleeve and a plurality of core units; wherein each of the core units is arranged inside the outer sleeve, and each of the core units is arranged in parallel and at intervals along the axial direction of the outer sleeve; a connecting screw is provided between any two adjacent core units, and its two ends are respectively connected to the two core units; end screws are provided at both ends of the outer sleeve, and each of the end screws is passed through the outer sleeve and connected to the core unit adjacent to the end screw.

[0005] Furthermore, the above-mentioned workpiece for making the dielectric characteristic ratio unit of the lightning arrester is characterized in that the core unit includes: a resistor sheet and two electrodes; wherein the resistor sheet is sandwiched between the two electrodes.

[0006] Furthermore, in the above-mentioned workpiece for making the dielectric characteristic ratio unit of the lightning arrester, the resistor sheet is sandwiched between the two electrodes.

[0007] Furthermore, in the above-mentioned workpiece for making the dielectric characteristic ratio unit of the lightning arrester, the side wall of each electrode is attached to the inner wall of the outer shell, and the electrode is threadedly connected to the connecting screw or the end screw.

[0008] Furthermore, in the above-mentioned workpiece for making the dielectric characteristic ratio unit of the lightning arrester, the inner space between the two adjacent core units is filled with insulating filler.

[0009] Furthermore, in the above-mentioned workpiece used to make the dielectric property ratio unit of the lightning arrester, the insulating filler is epoxy rod or epoxy glue.

[0010] Furthermore, in the above-mentioned workpiece for making the dielectric property ratio unit of the lightning arrester, the outer shell includes: an insulating outer shell and a composite outer shell wrapped around the outer surface of the insulating outer shell.

[0011] Furthermore, in the above-mentioned workpiece for making the dielectric characteristic ratio unit of the lightning arrester, the composite jacket is a silicone rubber umbrella skirt jacket formed by molding; and the insulating jacket is formed by curing the epoxy weftless tape or by injection molding of epoxy glue.

[0012] Furthermore, in the above-mentioned workpiece for making the dielectric characteristic ratio unit of the lightning arrester, the outsides of two adjacent core units are wrapped with epoxy flat tape, and a filling cavity is formed between the two adjacent core units for filling with insulating filler.

[0013] On the other hand, the present invention also proposes a processing method for a dielectric characteristic proportional unit of a lightning arrester, which processing method includes the following steps: processing the workpiece used to make the dielectric characteristic proportional unit of the lightning arrester; according to the positions of each core unit in the workpiece, selecting the position between any two adjacent core units as the cutting line, cutting the workpiece to obtain a number of cut bodies each containing a core unit; processing the end of the cut body so that a portion of the connecting screw on the cut body is exposed to obtain the dielectric characteristic proportional unit of the lightning arrester.

[0014] The present invention provides a workpiece and a processing method for manufacturing a dielectric characteristic proportional unit for a lightning arrester. The workpiece is formed by forming a processing core of the same size as the arrester core using a plurality of core units and a plurality of connecting screws arranged at intervals. The workpiece is then manufactured using existing molds and processing techniques for the arrester. After the workpiece is manufactured, the workpiece can be divided into a plurality of dielectric characteristic proportional units by cutting. The processing method for the dielectric characteristic proportional unit for a lightning arrester provided by the present invention can utilize the mold of the arrester, eliminating the need for separate molds. Furthermore, each resulting dielectric characteristic proportional unit fully restores the radial physical structure of the arrester, thereby reducing the manufacturing cost of the dielectric characteristic proportional units and improving the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0016] Figure 1 A schematic structural diagram of a workpiece for manufacturing a dielectric property proportional unit of a lightning arrester provided in an embodiment of the present invention;

[0017] Figure 2 A schematic structural diagram of cutting a workpiece for manufacturing a dielectric property ratio unit of a lightning arrester provided in an embodiment of the present invention;

[0018] Figure 3 A schematic structural diagram of a proportional unit processing for a workpiece used to manufacture a dielectric characteristic proportional unit of a lightning arrester provided in an embodiment of the present invention;

[0019] Figure 4 A flowchart of a method for processing a dielectric characteristic ratio unit of a lightning arrester provided in an embodiment of the present invention;

[0020] Description of reference numerals:

[0021] 1-jacket, 11-insulating jacket, 12-composite jacket, 2-core unit, 21-resistance sheet, 22-electrode, 3-connecting screw, 4-end screw, 5-insulating filler. DETAILED DESCRIPTION

[0022] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, unless there is a conflict, the embodiments of the present disclosure and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] Example of workpiece:

[0024] See also Figures 1 to 3 , which shows the preferred structure of a workpiece for making a dielectric property ratio unit of a lightning arrester provided by an embodiment of the present invention. As shown in the figure, the workpiece includes: an outer shell 1 and a plurality of core units 2; wherein,

[0025] Each core unit 2 is arranged inside the outer shell 1, and each core unit 2 is arranged in parallel and spaced apart along the axial direction of the outer shell 1. Specifically, the outer shell 1 can be a cylindrical structure with closed ends and a hollow interior; the core units 2 are arranged inside the outer shell 1 and along the axial direction of the outer shell 1 (such as Figure 1 The outer diameter of the core unit 2 is matched with the inner diameter of the outer shell 1, and each core unit 2 can be coaxially arranged with the outer shell 1 so that the outer shell 1 can be wrapped around the outside of the core unit 2. In this embodiment, the structure and size of the outer shell 1 can be the same as those of the lightning arrester so that it can be processed using the mold of the lightning arrester; the core unit 2 constitutes the core component of a dielectric property ratio unit, and its number can be determined according to actual conditions, such as the size and height of the lightning arrester outer shell, which are not limited in this embodiment.

[0026] A connecting screw 3 is provided between any two adjacent core units 2, and its two ends are respectively connected to the two core units 2. Specifically, each connecting screw 3 is provided between two adjacent core units 2 in a one-to-one correspondence, and each connecting screw 3 can be coaxially arranged with the core unit 2, that is, the axis of the connecting screw 20 coincides with the axis of the core unit 2, and one end of each connecting screw 3 can be connected to one of the core units 2, and the other end is connected to the other core unit 2. Among them, the connecting screw 3 and the core unit 2 are both provided inside the outer shell 1, and the connecting screw 3 and the core unit 2 can form a processing core equivalent to the arrester core, so that the existing mold and processing technology of the arrester can be used for processing.

[0027] Both ends of the jacket 1 (such as Figure 1 The upper and lower ends shown in the figure are each provided with an end screw 4, and each end screw 4 is passed through the outer sleeve 1 and connected to the core unit 2 adjacent to the end screw 4. Specifically, the end screw 4 is passed through the end of the outer sleeve 1, and one end of the end screw 4 extends into the interior of the outer sleeve 1 and is connected to the uppermost core unit 2 or the lowermost core unit 2. In this embodiment, the connecting screw 3 or the end screw 4 can be threadedly connected to the core unit 2 to facilitate installation and fixation between the two. Among them, the connecting screw 3 and the end screw 4 serve as electrode lead-out terminals so that a single core unit 2 can be connected and wired for testing.

[0028] In this embodiment, an insulating filler 5 is filled between two adjacent core units 2 within the outer shell 1 to insulate the two adjacent core units 2. When the core unit 2 is used as a single unit, the insulating filler 5 can insulate the ends of the core unit 2. Specifically, the empty cavity portion within the outer shell 1 can be filled with the insulating filler, which can be an epoxy rod or epoxy glue, or other insulating materials, and is not limited in this embodiment.

[0029] In this embodiment, the outer shell 1 can be processed and formed later. In order to facilitate the filling of the insulating filler 5, preferably, the outside of the two adjacent core units 2 is wrapped with an epoxy flat tape (not shown in the figure), and a filling cavity is formed between the two adjacent core units 2 for filling the insulating filler, so that the core unit 2 and the insulating filler form an integrated structure, which facilitates the processing and forming of the outer shell 1.

[0030] Continue to see Figures 1 to 2 The jacket 1 includes: an insulating jacket 11 and a composite jacket 12. Among them, the composite jacket 12 is wrapped around the outside of the insulating jacket 11. Specifically, the insulating jacket 11 forms a cylindrical inner cavity, and multiple core units 2 and connecting screws 3 are located in the inner cavity. The side surfaces of the inner cavity can be respectively fitted with the side surfaces of each core unit 2, and the two end surfaces of the inner cavity are respectively fitted with the end surfaces of the two core units 2 located at both ends. The remaining space in the inner cavity is filled with insulating filler 5. The composite jacket 40 wraps the outside of the insulating jacket 11. Among them, the composite jacket 12 can be a silicone rubber umbrella skirt sleeve formed by molding, and the insulating jacket 11 is formed by curing the epoxy non-woven tape or injecting the epoxy glue. The insulating jacket 11 can be processed by post-molding, so the two adjacent core units 2 are wrapped with epoxy non-woven tape and a cylindrical cavity is formed between the two adjacent core units 2. After the epoxy non-woven tape is wrapped, the cylindrical cavity formed between the two core units 2 is first filled with epoxy rods or epoxy glue, and then the insulating jacket 11 is processed, and then the composite jacket 12 is processed. However, it is not limited to this. In other exemplary embodiments, the insulating jacket 11 and the composite jacket 12 can be processed and formed according to the actual processing technology of the lightning arrester. In this embodiment, the end screw 4 is provided in the insulating jacket 11 and the composite jacket 12 and extends into the interior of the insulating jacket 11.

[0031] Continue to see Figures 1 to 2 The core unit 2 includes: a resistor 21 and two electrodes 22; wherein the resistor 21 is sandwiched between the two electrodes 22. Specifically, the resistor 21 and the two electrodes 22 can be coaxially arranged, and both are coaxially arranged with the outer shell 1, and the side walls of the electrodes 22 can be attached to the inner wall of the outer shell 1; in this embodiment, the electrodes 22 can be circular metal sheets, and their diameters can be adapted to the resistor 21. For example, the electrodes 22 can be circular metal sheets with a thickness of 3 mm to 8 mm. The resistor 21 and the two electrodes 22 are stacked to form a cylindrical structure. In this embodiment, the end screw 4 and / or the end of the connecting screw 3 can be connected to the electrode 22, and the connection can be achieved by threaded connection. The connecting screw 3 and the end screw 4 can be twisted into the electrode 22 by several threads, and the connection method is firm and easy to operate.

[0032] like Figure 2 and Figure 3 As shown, the workpiece used to make the dielectric characteristic ratio unit of the lightning arrester can be processed along the Figure 2 The dotted line in the figure cuts the workpiece, and the cut part can be cut according to Figure 3 As shown by the dotted line, a portion of the insulating jacket 11, the composite jacket 12 and the insulating filler 5 at the end is cut off to expose the remaining portion of the connecting screw 11, thereby obtaining a usable arrester dielectric characteristic proportional unit.

[0033] In summary, the workpiece provided in this embodiment for making the dielectric characteristic proportional unit of the lightning arrester is composed of a plurality of core units 2 and a plurality of connecting screws 3 arranged at intervals to form a processing core of the same size as the lightning arrester core, and then the workpiece is made using the existing mold and processing technology of the lightning arrester; after the workpiece is made, the workpiece can be divided into a plurality of dielectric characteristic proportional units by cutting. The workpiece provided by the present invention can be used to make dielectric characteristic proportional units, and the mold of the lightning arrester can be used without the need for independent mold opening, and each dielectric characteristic proportional unit obtained completely restores the radial physical structure of the lightning arrester, which can save the manufacturing cost of the dielectric characteristic proportional unit and improve the yield rate.

[0034] Processing method embodiment:

[0035] See also Figure 4 , which is a flowchart of a method for processing a dielectric property ratio unit of a lightning arrester provided by an embodiment of the present invention. As shown in the figure, the processing method includes the following steps:

[0036] Step S1 : processing the workpiece for manufacturing the dielectric characteristic ratio unit of the lightning arrester.

[0037] Specifically, a processing core body of the same size as the arrester core body can be formed by several core units 2 and several connecting screws 3 arranged at intervals, and then the existing mold and processing technology of the arrester can be used to make a processing part for making the dielectric characteristic proportional unit of the arrester. The specific processing method can be referred to in the above embodiment, and is not limited to it in this embodiment.

[0038] Step S2 : According to the positions of the core units in the workpiece, the position between any two adjacent core units is selected as a cutting line, and the workpiece is cut to obtain a plurality of cut bodies each containing a core unit.

[0039] Specifically, first, according to the position of each core unit in the workpiece, the position between any two adjacent core units can be selected as the cutting line, and the cutting line can be marked as follows: Figure 2 In this embodiment, the middle position between the core units 2 can be selected as the cutting position, and other positions can also be selected. There is no limitation on this embodiment. Then, the workpiece is cut according to the cutting line to obtain a plurality of cut bodies each containing a core unit 2.

[0040] Step S3: Process the end of the cut body so that a portion of the connecting screw on the cut body is exposed, thereby obtaining a dielectric characteristic proportional unit of the arrester.

[0041] Specifically, the cut parts can be Figure 3 As shown by the dotted line, a portion of the insulating jacket 11, the composite jacket 12 and the insulating filler 5 at the end is cut off to expose the remaining portion of the connecting screw 11, thereby obtaining a usable arrester dielectric characteristic proportional unit.

[0042] In summary, the processing method of the dielectric characteristic proportional unit of the lightning arrester provided in this embodiment is to form a processing core of the same size as the lightning arrester core by a plurality of core units 2 and a plurality of connecting screws 3 arranged at intervals, and then to make it by using the existing mold and processing technology of the lightning arrester; after the workpiece is made, the workpiece can be divided into a plurality of dielectric characteristic proportional units by cutting. The processing method of the dielectric characteristic proportional unit of the lightning arrester provided by the present invention can utilize the mold of the lightning arrester without the need for independent mold opening, and each dielectric characteristic proportional unit obtained completely restores the radial physical structure of the lightning arrester, which can save the manufacturing cost of the dielectric characteristic proportional unit and improve the yield rate.

[0043] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0044] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0045] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A workpiece for making a dielectric characteristic ratio unit of a lightning arrester, characterized in that: include: An outer shell (1) and a plurality of core units (2); wherein, Each of the core units (2) is arranged inside the outer shell (1), and each of the core units (2) is arranged in parallel and at intervals along the axial direction of the outer shell (1); A connecting screw (3) is provided between any two adjacent core units (2), and its two ends are respectively connected to the two core units (2); Both ends of the outer sleeve (1) are provided with end screws (4), and each end screw (4) is passed through the outer sleeve (1) and connected to the core unit (2) adjacent to the end screw (4); The outer shell (1) is filled with an insulating filler (5) between two adjacent core units (2); The outer jacket (1) comprises an insulating outer jacket (11) and a composite outer jacket (12) wrapped around the outer side of the insulating outer jacket (11).

2. The workpiece for manufacturing a dielectric characteristic ratio unit of a lightning arrester according to claim 1, characterized in that: The core unit (2) comprises: a resistor (21) and two electrodes (22); wherein, The resistor sheet (21) is sandwiched between the two electrodes (22).

3. The workpiece for manufacturing a dielectric characteristic ratio unit of a lightning arrester according to claim 2, characterized in that: The electrode (22) is a circular metal sheet, and is coaxially arranged with the resistor sheet (21).

4. The workpiece for manufacturing a dielectric characteristic ratio unit of a lightning arrester according to claim 2, characterized in that: The side wall of each electrode (22) is attached to the inner wall of the outer shell (1), and the electrode (22) is threadedly connected to the connecting screw (3) or the end screw (4).

5. The workpiece for manufacturing a dielectric characteristic ratio unit of a lightning arrester according to claim 1, characterized in that: The insulating filler (5) is an epoxy rod or epoxy glue.

6. The workpiece for manufacturing a dielectric characteristic ratio unit of a lightning arrester according to claim 1, characterized in that: The composite outer cover (12) is a silicone rubber umbrella skirt cover formed by molding; The insulating jacket (11) is formed by curing the epoxy non-woven tape or by injection molding the epoxy adhesive.

7. The workpiece for manufacturing a dielectric characteristic ratio unit of a lightning arrester according to any one of claims 1 to 4, characterized in that: The outsides of two adjacent core units (2) are wrapped with epoxy flat tape, and a filling cavity is formed between the two adjacent core units (2) for filling with an insulating filler (5).

8. A method for processing a dielectric characteristic proportional unit of a lightning arrester, characterized in that: The steps include: Processing the workpiece for manufacturing the dielectric characteristic ratio unit of a lightning arrester according to any one of claims 1 to 7; According to the positions of the core units in the workpiece, the position between any two adjacent core units is selected as a cutting line, and the workpiece is cut to obtain a plurality of cut bodies each containing a core unit; The end of the cutting body is processed so that a portion of the connecting screw on the cutting body is exposed, thereby obtaining a lightning arrester dielectric characteristic proportional unit.

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