High-voltage non-inductive resistor

Abstract

The utility model discloses a high-voltage non-inductive resistor, which solves the problems of complex production process, high cost and weak short-time impact current resistance of the existing non-inductive resistor, and specifically comprises a resistance tape, a first insulating plate, a second insulating plate, an insulating screw rod assembly and two electrode plates, the resistance tape is bent into a multi-layer structure from bottom to top in an S shape, and a plurality of left notches and right notches which are arranged at intervals from bottom to top are formed; the number of the first insulating plates is equal to the total number of the left notches and the right notches, and the first insulating plates are transversely inserted into the left notches and the right notches respectively. The two second insulating plates are transversely pressed at the upper end and the lower end of the multi-layer structure respectively; the two electrode plates transversely press the upper and lower sides, far away from each other, of the two second insulating plates respectively, and the two ends of the resistance tape are electrically connected with the two electrode plates respectively; the number of the insulating screw assemblies is at least three. And each insulating screw assembly is vertically arranged in the first insulating plate, the second insulating plate and the electrode plate in a penetrating manner.

Description

Technical Field

[0001] This utility model relates to resistors, specifically to a high-voltage non-inductive resistor. Background Technology

[0002] High-voltage non-inductive resistors are the most commonly used power devices in the power transmission and distribution field. With the reform and upgrading of power equipment, higher requirements are also put forward for high-voltage non-inductive resistors.

[0003] Traditional non-inductive resistors are usually made by winding tin-plated fine copper wire using a non-inductive winding method. The production process of this type of non-inductive resistor is relatively complex, and the production cost is high. Each non-inductive resistor is also relatively heavy. Moreover, it has a weak ability to withstand short-time inrush current. That is, when the instantaneous current is too large, the insulation layer (tin) outside the copper wire is easily burned off, often leading to inter-turn short circuits. Utility Model Content

[0004] To address the technical problems of existing non-inductive resistors, such as complex manufacturing processes, high costs, and weak resistance to short-term inrush currents, this invention provides a high-voltage non-inductive resistor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-voltage non-inductive resistor, which is special in that:

[0007] It includes a resistor strip, a first insulating plate, a second insulating plate, an insulating screw assembly, and two electrode plates;

[0008] The resistor strip is bent in an S-shape from bottom to top into a multi-layer structure, forming multiple left and right notches spaced apart from bottom to top; at least one layer of first insulating plate is inserted into each left and right notch respectively;

[0009] There are two second insulating plates, which are respectively pressed horizontally at the upper and lower ends of the multilayer structure;

[0010] The two electrode plates are respectively pressed horizontally on the upper and lower sides of the two second insulating plates, which are far apart from each other, and the two ends of the resistance band are electrically connected to the two electrode plates respectively.

[0011] The insulating screw assembly includes at least three; each insulating screw assembly is vertically inserted into the first insulating plate, the second insulating plate, and the electrode plate for connection and fixation of the three.

[0012] Furthermore, a groove is provided at one end of the first insulating plate;

[0013] The groove width matches the width of the resistor strip, so that when the first insulating plate is inserted into each left and right notch, the bending area of ​​the resistor strip is located in the corresponding groove.

[0014] Furthermore, the insulating screw assembly includes an insulating screw and insulating nuts disposed at both ends of the insulating screw;

[0015] The insulating screw is vertically inserted into the first insulating plate, the second insulating plate, and the electrode plate, and its two ends are limited by insulating nuts.

[0016] Furthermore, it also includes an insulating tube shell that is fitted over the resistor strip, the first insulating plate, the second insulating plate, the insulating screw assembly and the two electrode plates, as well as two electrode caps that are fitted over both ends of the insulating tube shell;

[0017] The electrode caps are detachably connected to the insulating tube shell, and the two electrode caps are respectively connected to the two electrode plates.

[0018] Furthermore, the middle part of the electrode plate protrudes towards the corresponding electrode cover to form a connecting post;

[0019] Both the electrode cap and the connecting post are provided with corresponding bolt holes for connecting to external conductors.

[0020] Furthermore, the resistor band is made of a nickel-chromium alloy;

[0021] Both the first insulating plate and the second insulating plate are rectangular in shape;

[0022] The insulating screw assembly comprises four screws, which are respectively positioned near the four corners of the first insulating plate and the second insulating plate.

[0023] Furthermore, both the first and second insulating boards are epoxy boards with a thickness of 1mm-2mm.

[0024] Furthermore, the electrode plate is a circular copper electrode plate;

[0025] The electrode cover is a circular aluminum electrode plate.

[0026] Furthermore, the insulating screw is a bakelite screw;

[0027] The insulating nut is a bakelite nut.

[0028] Furthermore, the insulating casing is an epoxy casing.

[0029] The beneficial effects of this utility model are:

[0030] 1. The high-voltage non-inductive resistor provided by this utility model has a multi-layer structure in which the resistor strip is bent from bottom to top in an S-shape, and multiple left and right gaps are set from bottom to top. The left and right gaps are provided with a first insulating plate. The layer separation method effectively solves the problem of inter-turn short circuit; and the multi-layer structure formed by the S-shaped bend can eliminate the inductance in the circuit.

[0031] 2. The high-voltage non-inductive resistor provided by this utility model is simple to manufacture and easy to install. It can be manufactured and assembled without the need for complicated tools, which greatly simplifies the production process compared with existing high-voltage non-inductive resistors.

[0032] 3. The high-voltage non-inductive resistor provided by this utility model has a variety of resistance strip materials, and its cost is much lower than that of tin-plated copper wire, which can save a lot of costs.

[0033] 4. The present invention preferably uses a nickel-chromium alloy to make the resistance strip, which enables the resistance strip to withstand a strong short-time inrush current.

[0034] 5. The high-voltage non-inductive resistor provided by this utility model is small in size and light in weight, and can be used in a variety of confined spaces, thus expanding its application range. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a high-voltage non-inductive resistor according to a first embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the resistor band structure in Embodiment 1 of this utility model;

[0037] Figure 3 This is a schematic diagram of the structure of the first insulating plate in Embodiment 1 of this utility model;

[0038] Figure 4 This is a schematic diagram of the structure of the second insulating plate in Embodiment 1 of this utility model;

[0039] Figure 5 This is a schematic diagram of the electrode plate in Embodiment 1 of this utility model;

[0040] Figure 6 This is a schematic diagram of the structure of a second embodiment of a high-voltage non-inductive resistor according to this utility model.

[0041] Icon labels:

[0042] 1-Resistor strip, 11-Left notch, 12-Right notch, 2-First insulating plate, 21-Groove, 3-Second insulating plate, 4-Insulating screw, 41-Insulating nut, 5-Electrode plate, 51-Connecting post, 6-Insulating tube shell, 7-Electrode cover, 8-Bolt hole. Detailed Implementation

[0043] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0044] Example 1:

[0045] This embodiment provides a high-voltage non-inductive resistor, such as... Figure 1 As shown, the resistor includes a resistor strip 1, a first insulating plate 2, a second insulating plate 3, an insulating screw 4, and two electrode plates 5;

[0046] like Figure 2 As shown, the resistor strip 1 is bent in an S-shape from bottom to top into a multi-layered structure, forming multiple left notches 11 and right notches 12 spaced apart from bottom to top. The resistor strip 1 is made of nickel-chromium alloy, but in other embodiments it may be made of other materials.

[0047] Combination Figure 1 , Figure 2 , Figure 3 As shown, at least one layer of first insulation 2 is inserted into each left notch 11 and right notch 12 to separate the upper and lower resistance bands 1. In this embodiment, two layers of first insulation 2 are inserted to increase the heat dissipation surface. One end of the first insulation plate 2 is provided with a groove 21. The groove width of the groove 21 matches the width of the resistance band 1, so that when the first insulation plate 2 is inserted into each left notch 11 and right notch 12, the bending area of ​​the resistance band 1 is located in the corresponding groove 21. There are two second insulation plates 3, which are respectively pressed horizontally on the upper and lower ends of the multilayer structure.

[0048] Combination Figure 1 and Figure 5 As shown, two electrode plates 5 are respectively pressed horizontally on the upper and lower sides of two second insulating plates 3, which are far apart from each other. The two ends of the resistor strip 1 are electrically connected to the two electrode plates 5 respectively. The middle part of the electrode plate 5 protrudes towards the corresponding electrode cover 7 to form a connecting post 51. The middle part of the connecting post 51 is provided with a bolt hole 8 for connecting to an external conductive body. The electrode plate 5 is a circular copper electrode plate.

[0049] Combination Figure 1 , Figure 3 and Figure 4 As shown, both the first insulating plate 2 and the second insulating plate 3 are rectangular; the outer contours of the two electrode plates 5 are larger than the outer contours of the first insulating plate 2 and the second insulating plate 3. Both the first insulating plate 2 and the second insulating plate 3 are epoxy boards with a thickness of 1mm-2mm.

[0050] Four insulating screws 4 are provided, each positioned near one of the four corners of the first insulating plate 2 and the second insulating plate 3. Each insulating screw 4 is vertically inserted into the first insulating plate 2, the second insulating plate 3, and the electrode plate 5, and each end of the insulating screw 4 is provided with an insulating nut 41. In other embodiments, the number of insulating screws 4 can be three or more, as long as the first insulating plate 2, the second insulating plate 3, and the electrode plate 5 are connected together. The insulating screws 4 are bakelite screws; the insulating nuts 41 are bakelite nuts.

[0051] Example 2:

[0052] This embodiment provides a high-voltage non-inductive resistor, such as... Figure 6 As shown, the resistor structure is basically the same as the resistor structure in Embodiment 1, except that:

[0053] The resistor also includes a package housing, specifically, the package housing includes an insulating tube shell 6 that is fitted over the resistor strip 1, the first insulating plate 2, the second insulating plate 3, the insulating screw 4 and the two electrode plates 5, and two electrode caps 7 that are fitted over both ends of the insulating tube shell 6.

[0054] The electrode cover 7 is detachably connected to the insulating shell 6, and both electrode covers 7 are provided with bolt holes 8; the bolt holes 8 on the electrode cover 7 and the bolt holes 8 on the connecting post 51 are coaxial and are used to connect to external conductors. The electrode cover 7 is a circular aluminum electrode plate. The insulating shell 6 is an epoxy shell.

[0055] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A high-voltage non-inductive resistor, characterized in that: It includes a resistor strip (1), a first insulating plate (2), a second insulating plate (3), an insulating screw assembly, and two electrode plates (5); The resistor strip (1) is bent in an S-shape from bottom to top into a multi-layer structure, and forms multiple left notches (11) and right notches (12) spaced apart from bottom to top; at least one layer of first insulating plate (2) is inserted into each left notch (11) and right notch (12); There are two second insulating plates (3), which are respectively pressed horizontally at the upper and lower ends of the multilayer structure; The two electrode plates (5) are respectively pressed horizontally on the upper and lower sides of the two second insulating plates (3) which are far apart from each other, and the two ends of the resistance band (1) are respectively electrically connected to the two electrode plates (5); The insulating screw assembly includes at least three; each of the insulating screw assemblies is vertically inserted into the first insulating plate (2), the second insulating plate (3), and the electrode plate (5) for connection and fixation of the three.

2. The high-voltage non-inductive resistor according to claim 1, characterized in that: One end of the first insulating plate (2) is provided with a groove (21); The groove width of the groove (21) matches the width of the resistor strip (1), so that when the first insulating plate (2) is inserted into each left notch (11) and right notch (12), the bending area of ​​the resistor strip (1) is located in the corresponding groove (21).

3. The high-voltage non-inductive resistor according to claim 1 or 2, characterized in that: The insulating screw assembly includes an insulating screw (4) and insulating nuts (41) disposed at both ends of the insulating screw (4); The insulating screw (4) is vertically inserted into the first insulating plate (2), the second insulating plate (3), and the electrode plate (5), and its two ends are limited by insulating nuts (41).

4. The high-voltage non-inductive resistor according to claim 3, characterized in that: It also includes an insulating tube shell (6) that is fitted over the resistor strip (1), the first insulating plate (2), the second insulating plate (3), the insulating screw assembly and the two electrode plates (5), and two electrode caps (7) that are fitted over both ends of the insulating tube shell (6); The electrode cover (7) is detachably connected to the insulating tube shell (6), and the two electrode covers (7) are respectively connected to the two electrode plates (5).

5. The high-voltage non-inductive resistor according to claim 4, characterized in that: The middle part of the electrode plate (5) protrudes towards the corresponding electrode cover (7) to form a connecting post (51); Both the electrode cover (7) and the connecting post (51) are provided with corresponding bolt holes (8) for connecting to external conductors.

6. The high-voltage non-inductive resistor according to claim 5, characterized in that: The resistance band (1) is made of nickel-chromium alloy; Both the first insulating plate (2) and the second insulating plate (3) are rectangular; The insulating screw assembly comprises four screws, which are respectively positioned near the four corners of the first insulating plate (2) and the second insulating plate (3).

7. The high-voltage non-inductive resistor according to claim 6, characterized in that: The first insulating plate (2) and the second insulating plate (3) are both epoxy boards with a thickness of 1mm-2mm.

8. The high-voltage non-inductive resistor according to claim 7, characterized in that: The electrode plate (5) is a circular copper electrode plate; The electrode cover (7) is a circular aluminum electrode plate.

9. The high-voltage non-inductive resistor according to claim 8, characterized in that: The insulating screw (4) is a bakelite screw; The insulating nut (41) is a bakelite nut.

10. The high-voltage non-inductive resistor according to claim 9, characterized in that: The insulating casing (6) is an epoxy casing.

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