Band-shaped resistor

Abstract

The utility model provides a band-shaped resistor, which is used for solving the problems that the existing large-current resistor is larger in size and higher in production cost, the through-flow area of the traditional wire type resistor and membrane type resistor cannot meet the requirement of impact current, and the requirements of intelligence and miniaturization are not met. According to the strip-shaped resistor provided by the utility model, the strip-shaped resistor bodies which are arranged and fixed in the mounting frame in a multi-layer manner are arranged, and the strip-shaped resistor bodies effectively increase the length of a resistor through-flow path through a continuous bending process, so that the requirement on the cross section size of the resistor required by high-current impact is met; meanwhile, the plurality of strip-shaped resistor bodies are connected in parallel or sequentially connected in series through the respective metal lead-out sheets, or each P strip-shaped resistor bodies are connected in series and then connected in parallel, so that the requirements of different resistance values can be met; the strip-shaped resistor disclosed by the utility model is small in size, large in through-flow, convenient to install and very strong in mechanical property, and can effectively ensure the safe and reliable operation of a product.

Description

Technical Field

[0001] This utility model relates to resistors, and more particularly to a strip resistor. Background Technology

[0002] Currently, in industries such as power transmission and distribution, ultra-high voltage power supply and distribution systems, pulse power, and power supplies, the demand for high-current resistors in system startup and energy absorption devices is becoming increasingly widespread. To achieve high-current (over 300A for extended periods) resistors, resistor materials with large cross-sectional areas must be used. Typically, metallic resistor materials have low resistivity; increasing their cross-sectional area necessitates increasing the length of the resistor material to achieve a certain resistance value. Furthermore, considering the design of the support material, this inevitably leads to a larger resistor volume and increased production costs. Even so, the current-carrying area of ​​traditional wire resistors and film resistors often still falls short of the requirements for inrush current. In addition, the overall trend in power transmission and distribution system equipment is towards intelligence and miniaturization; increasing the size of resistors would limit their application range and make them difficult to adapt to the industry's rapid development. Utility Model Content

[0003] The purpose of this invention is to solve the problems of existing high-current resistors being large in size and having high production costs, and traditional wire resistors and film resistors not having the current-carrying area required for surge current, as well as not meeting the requirements for intelligent and miniaturized design, and to provide a strip resistor.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A strip resistor is characterized in that it includes a mounting frame and M*N strip resistors, where M is the number of layers of strip resistors, M≧1, and N is the number of strip resistors on each layer, N≧1.

[0006] Each of the strip resistors is a resistor strip with multiple bends;

[0007] M*N strip resistors are arranged in M ​​layers with N resistors per layer within the mounting frame. Each strip resistor is bent on both sides of its extension direction. Each strip resistor has metal leads at both ends, which pass through the corresponding sidewalls of the mounting frame and are insulated from the mounting frame.

[0008] When N=1, the two sides of each strip resistor are fixed to the inner wall of the mounting frame by side insulation support components.

[0009] When N≧2, the strip resistor in each layer is fixed to the inner wall of the mounting frame by the side insulation support assembly, and the adjacent sides of the adjacent strip resistors are connected by the intermediate isolation support assembly.

[0010] M*N strip resistors are connected in parallel or in series through their respective metal leads, where M*N≥2; or, each P strip resistor is connected in series and then in parallel, where M*N is an even number greater than or equal to 4, and 2≤P≤M*N / 2.

[0011] Furthermore, the mounting frame is formed by the left side plate, right side plate, front side plate and rear side plate;

[0012] A fixing hole is provided at each bend on both sides of the strip resistor;

[0013] The side insulation support assembly includes multiple side insulation columns, one end of which is provided with a protrusion; the protrusion at one end of the multiple side insulation columns mates with the fixing hole at the corresponding bend of the strip resistor, and the other end is fixed to the left side plate or the right side plate to achieve an insulating connection between the strip resistor and the mounting frame.

[0014] The intermediate isolation support assembly includes a support rod and a plurality of intermediate isolation components sequentially fitted onto the support rod;

[0015] The support rod is positioned between two adjacent strip resistors on the same layer, and both ends of the support rod are fixed to the front and rear side plates, respectively. The two ends of the intermediate isolation member are provided with protrusions, and the protrusions at both ends of the multiple intermediate isolation members respectively cooperate with the fixing holes at the bends of two horizontally adjacent strip resistors to achieve an insulating connection between the two adjacent strip resistors.

[0016] Furthermore, it also includes multiple outgoing isolation components;

[0017] Multiple lead-out isolation components are respectively installed on the front and rear side panels at the positions corresponding to each strip resistor;

[0018] One end of the metal lead is welded to one end of the corresponding strip resistor, and the other end passes through the lead-out isolation piece on the corresponding front or rear side plate and is electrically connected to the metal lead of other strip resistors or an external power supply.

[0019] Furthermore, it also includes bolts;

[0020] Multiple bolts pass through the left or right side plate and are threaded to the corresponding side insulating column.

[0021] Furthermore, at least one heat dissipation fin is provided on the strip resistor.

[0022] Furthermore, in the M*N strip resistors, the metal leads of two adjacent strip resistors in the same layer are electrically connected by a second connecting row, and the metal leads of two adjacent strip resistors in adjacent layers are electrically connected by a first connecting row.

[0023] Furthermore, the metal lead-out piece is made of stainless steel or copper;

[0024] The first connecting row is made of stainless steel or copper;

[0025] The second row is made of stainless steel or copper.

[0026] Furthermore, the left side plate, right side plate, front side plate, and rear side plate are all made of galvanized carbon steel or stainless steel.

[0027] The support rod is made of galvanized carbon steel or stainless steel.

[0028] Furthermore, the side insulating pillar is made of ceramic material;

[0029] The intermediate spacer is made of ceramic.

[0030] The outgoing line isolation component is made of ceramic.

[0031] Furthermore, the strip resistor is a resistor made of nickel-chromium alloy.

[0032] The advantages of this utility model compared to the prior art are as follows:

[0033] 1. This utility model provides a strip resistor that abandons the traditional manufacturing methods of wire resistors and film resistors. It features a multi-layered strip resistor body fixed within a mounting frame. The strip resistor body effectively increases the length of the resistance path through a continuous bending process, meeting the resistance cross-sectional dimensions required for high current surges. Simultaneously, multiple strip resistor bodies can be connected in parallel, in series, or in series with each P strip resistor body before being connected in parallel, thus meeting the needs for different resistance values. This utility model's strip resistor is small in size, has a large current capacity, is easy to install, and possesses strong mechanical properties, effectively ensuring the safe and reliable operation of the product.

[0034] 2. The strip resistor provided by this utility model has a simple structure. Under the same resistance requirement, the volume of each strip resistor is reduced by continuous bending process. Compared with spot welding, it avoids many joints and thus avoids excessive contact resistance. Continuous bending can more reliably achieve the continuity of the sheet structure. At the same time, the multi-layer arrangement further reduces the volume of the entire strip resistor. The processing cost is low and the fixing is more reliable. The component failure rate is low and the resistor has a high continuous power.

[0035] 3. The present invention has heat dissipation protrusions pressed on the strip resistor, which not only increases the heat dissipation area of ​​the strip resistor, but also increases the strength of the strip resistor.

[0036] 4. This utility model uses ceramic side insulating pillars, intermediate isolation components, and outgoing wire isolation components to insulate and fix the strip resistor, which not only effectively reduces costs but also allows the strip resistor to dissipate heat quickly and fully. At the same time, compared with the closed resistor structure, the frame structure of this utility model allows the strip resistor to exchange heat fully with the air. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of an embodiment of the strip resistor of this utility model. Figure 1 ;

[0038] Figure 2 This is a schematic diagram of the structure of an embodiment of the strip resistor of this utility model. Figure 2 (Installation frame not displayed);

[0039] Figure 3 This is an exploded view of an embodiment of a strip resistor according to the present invention;

[0040] Figure 4 This is a schematic diagram of the structure of the strip resistor body and heat dissipation fins in an embodiment of the strip resistor of this utility model.

[0041] The specific labeling in the attached diagram is as follows:

[0042] 1-Strip resistor, 2-First connecting row, 3-Second connecting row, 4-Metal lead plate, 5-Bolt, 6-Side insulating column, 7-Outlet isolation piece, 8-Intermediate isolation piece, 9-Support rod, 10-Left side plate, 11-Right side plate, 12-Front side plate, 13-Rear side plate, 111-Heat dissipation fin. Detailed Implementation

[0043] To make the advantages and features of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] like Figures 1-3 As shown, a strip resistor includes a mounting frame, four strip resistors 1, multiple side insulation support assemblies, multiple intermediate isolation support assemblies, multiple metal lead-out pieces 4, multiple lead-out isolation pieces 7, and multiple bolts 5.

[0045] The mounting frame is formed by the left side plate 10, the right side plate 11, the front side plate 12, and the rear side plate 13. In this embodiment, the left side plate 10, the right side plate 11, the front side plate 12, and the rear side plate 13 are all made of stainless steel. In other embodiments of this utility model, they can also be made of galvanized carbon steel.

[0046] Each of the four strip resistors 1 is a resistor strip with multiple bends. The four strip resistors 1 are arranged in two layers, two per layer, within the mounting frame. Each strip resistor 1 is bent on both sides of its extension direction. Multiple lead-out isolation pieces 7 are respectively fastened to the front side plate 12 and the rear side plate 13 at the positions corresponding to each strip resistor 1. One end of the metal lead piece 4 is welded to one end of the corresponding strip resistor 1 by argon arc welding, and the other end passes through the lead-out isolation piece 7 on the corresponding front side plate 12 or rear side plate 13 and extends out, so that the metal lead piece 4 is insulated and fixed by the lead-out isolation piece 7.

[0047] Four strip resistors 1 are designated as strip resistor A, strip resistor B, strip resistor C, and strip resistor D. Strip resistors A and B are arranged in the first layer within the mounting frame, and strip resistors C and D are arranged in the second layer within the mounting frame. Strip resistors A and C are in the same vertical direction, as are strip resistors B and D. Strip resistors A and C are fixed to the left side plate 10 near the left side plate 10 via a side insulating support assembly, and strip resistors B and D are fixed to the right side plate 11 near the right side plate 11 via a side insulating support assembly. Strip resistors A and B, and strip resistors C and D, are respectively connected by an intermediate isolation support assembly for insulating support. Specifically, each bend of the four strip resistors 1 is provided with a fixing hole; each side insulation support assembly includes multiple side insulation columns 6, and one end of each side insulation column 6 is provided with a protrusion; the protrusions on the multiple side insulation columns 6 cooperate with the fixing holes at the corresponding bends of the strip resistors 1 to achieve connection; multiple bolts 5 pass through the left side plate 10 or the right side plate 11 respectively and are threaded to the other end of the corresponding side insulation column 6, so that the side insulation column 6 is fixed on the left side plate 10 or the right side plate 11, and finally achieves the insulating connection between the four strip resistors 1 and the mounting frame. The intermediate isolation support assembly includes a support rod 9 and multiple intermediate isolation pieces 8; the outer wall of the support rod 9 is a square structure, and the intermediate isolation pieces 8 are provided with square through holes that are adapted to the square structure of the outer wall of the support rod 9. Multiple intermediate isolation pieces 8 are sequentially fitted onto the support rod 9 through the square through holes; the support rod 9 is set between two adjacent strip resistors 1 in the same layer, that is, one support rod 9 is set between strip resistors A and B, and between strip resistors C and D. The support rod 9 has external threads at both ends for threaded connection with the front side plate 12 and the rear side plate 13, respectively. The intermediate spacer 8 has protrusions at both ends, and these protrusions engage with the fixing holes at the bends of two adjacent strip resistors 1 to achieve an insulated connection between adjacent strip resistors 1. In other embodiments of this invention, if the number of strip resistors 1 in each layer is only one, no intermediate spacer support assembly is provided; each strip resistor 1 is fixed to the left side plate 10 or the right side plate 11 by a side insulating support assembly on both sides. If the number of strip resistors 1 in each layer is greater than two, adjacent sides of adjacent strip resistors 1 are insulatedly connected by an intermediate spacer support assembly.

[0048] In this embodiment, strip resistors A, C, D, and B are connected in series. One end of strip resistor A has a metal lead 4 connected to an external power source. The other end of strip resistor A has a metal lead 4 connected to one end of strip resistor C via a first connecting bar 2. The other end of strip resistor C has a metal lead 4 connected to one end of strip resistor D via a second connecting bar 3. The other end of strip resistor D has a metal lead 4 connected to one end of strip resistor B via another first connecting bar 2. The other end of strip resistor B has a metal lead 4 connected to an external power source. In other embodiments of this utility model, each strip resistor 1 can be connected in parallel with each other according to the required resistance value, or when the number of strip resistors 1 is an even number greater than or equal to 4, each M strip resistors 1 can be connected in series and then connected in parallel with each other, where N is an even number greater than or equal to 4, and 2≤M<N.

[0049] like Figure 4 As shown, each strip resistor 1 is provided with multiple heat dissipation protrusions 111 to increase the heat dissipation area of ​​the strip resistor 1 and allow the heat of the strip resistor 1 to be dissipated quickly. The number of heat dissipation protrusions 111 on each strip resistor 1 can be designed as needed and is evenly distributed along the length of the strip resistor 1. In this embodiment, the heat dissipation protrusions 111 are implemented by pressing them onto the strip resistor 1, which not only increases the heat dissipation area of ​​the strip resistor 1, but also increases the strength of the strip resistor 1.

[0050] The strip resistor 1 can be any metallic material that meets the material resistivity requirements; in this embodiment, a nickel-chromium alloy is used. The side insulating pillars 6, the lead-out insulating element 7, and the intermediate insulating element 8 are all made of ceramic for insulation purposes, such as 95% alumina, talc ceramic, or cordierite ceramic. To achieve support rigidity, the left side plate 10, right side plate 11, front side plate 12, rear side plate 13, and support rod 9 are made of galvanized carbon steel or stainless steel; the first connecting row 2, second connecting row 3, and metal lead-out piece 4 are made of stainless steel or copper for conductivity. In this embodiment, the side insulating pillars 6, lead-out insulating element 7, and intermediate insulating element 8 are all made of 95% alumina; the left side plate 10, right side plate 11, front side plate 12, rear side plate 13, support rod 9, first connecting row 2, second connecting row 3, and metal lead-out piece 4 are all made of stainless steel.

[0051] The fabrication process of the strip resistor in this embodiment is as follows:

[0052] 1. Select nickel-chromium alloy material as the raw material for the resistor strip according to the resistance parameters, and design the appropriate length and quantity of the resistor strip according to the electrical parameters; press heat dissipation fins, prepare fixing holes and continuously bend the resistor strip to form a strip resistor body 1 to ensure the electrical performance of the resistor.

[0053] 2. Select high-temperature resistant insulating materials, such as ceramic materials, and process them into the required specifications for the side insulating column 6, the outgoing wire isolation component 7, and the intermediate isolation component 8 to ensure the resistance insulation performance and support performance.

[0054] 3. Assemble and fix multiple strip resistors 1 to the mounting frame via side insulating pillars 6, outgoing wire isolation components 7, and intermediate isolation components 8;

[0055] 4. Connect multiple strip resistors 1 electrically according to the resistance parameters to achieve the required resistance value.

[0056] The above description is only used to illustrate the technical solution of this utility model, and is not intended to limit it. For those skilled in the art, modifications can be made to the specific technical solutions described in the above embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions protected by this utility model.

Claims

1. A strip resistor, characterized in that: It includes an installation frame and M*N strip resistors (1), where M is the number of layers of strip resistors (1), M≧1, and N is the number of strip resistors (1) on each layer, N≧1; Each of the strip resistors (1) is a resistor strip with multiple bends; M*N strip resistors (1) are arranged in M ​​layers with N in each layer in the mounting frame. Each strip resistor (1) is bent on both sides of its extension direction. Each strip resistor (1) has a metal lead (4) at both ends. The metal lead (4) passes through the corresponding side wall of the mounting frame and is insulated from the mounting frame. When N=1, the two sides of each strip resistor (1) are fixed to the inner wall of the mounting frame by the side insulation support assembly. When N≧2, the strip resistor (1) in each layer is fixed to the inner wall of the mounting frame by the side insulation support assembly, and the adjacent sides of the adjacent strip resistor (1) are connected by the intermediate isolation support assembly. M*N strip resistors (1) are connected in parallel or in series through their respective metal leads (4), M*N≥2; or, each P strip resistor (1) is connected in series and then in parallel, M*N is an even number greater than or equal to 4, 2≤P≤M*N / 2.

2. A strip resistor according to claim 1, characterized in that: The mounting frame is formed by the left side plate (10), the right side plate (11), the front side plate (12), and the rear side plate (13); A fixing hole is provided at each bend on both sides of the strip resistor (1); The side insulation support assembly includes multiple side insulation columns (6), one end of which is provided with a protrusion; the protrusion at one end of the multiple side insulation columns (6) cooperates with the fixing hole at the bend of the corresponding strip resistor (1), and the other end is fixed on the left side plate (10) or the right side plate (11) to realize the insulating connection between the strip resistor (1) and the mounting frame. The intermediate isolation support assembly includes a support rod (9) and a plurality of intermediate isolation pieces (8) sequentially fitted onto the support rod (9); The support rod (9) is set between two adjacent strip resistors (1) on the same layer, and the two ends of the support rod (9) are fixed on the front side plate (12) and the rear side plate (13) respectively; the two ends of the intermediate isolation member (8) are respectively provided with protrusions, and the protrusions at both ends of the multiple intermediate isolation members (8) respectively cooperate with the fixing holes at the bends of the two adjacent strip resistors (1) to realize the insulating connection between the two adjacent strip resistors (1).

3. A strip resistor according to claim 2, characterized in that: It also includes multiple outgoing isolation components (7); Multiple outgoing line isolation components (7) are respectively installed on the front side plate (12) and the rear side plate (13) at the positions corresponding to each strip resistor (1); One end of the metal lead-out piece (4) is welded to one end of the corresponding strip resistor (1), and the other end passes through the lead-out isolation piece (7) on the corresponding front side plate (12) or rear side plate (13) and is electrically connected to the metal lead-out piece (4) of other strip resistors (1) or an external power supply.

4. A strip resistor according to claim 2, characterized in that: It also includes bolts (5); Multiple bolts (5) pass through the left side plate (10) or the right side plate (11) respectively and are threaded to the corresponding side insulating column (6).

5. A strip resistor according to any one of claims 1-4, characterized in that: At least one heat dissipation fin (111) is provided on the strip resistor (1).

6. A strip resistor according to claim 1, characterized in that: Among the M*N strip resistors, the metal leads (4) of two adjacent strip resistors (1) in the same layer are electrically connected by a second connecting row (3), and the metal leads (4) of two adjacent strip resistors (1) in adjacent layers are electrically connected by a first connecting row (2).

7. A strip resistor according to claim 6, characterized in that: The metal lead-out piece (4) is made of stainless steel or copper. The first row (2) is made of stainless steel or copper. The second row (3) is made of stainless steel or copper.

8. A strip resistor according to claim 2, characterized in that: The left side plate (10), right side plate (11), front side plate (12) and rear side plate (13) are all made of galvanized carbon steel or stainless steel. The support rod (9) is made of galvanized carbon steel or stainless steel.

9. A strip resistor according to claim 3, characterized in that: The side insulating column (6) is made of ceramic. The intermediate spacer (8) is made of ceramic. The outgoing line isolation component (7) is made of ceramic.

10. A strip resistor according to claim 1, characterized in that: The strip resistor (1) is a resistor made of nickel-chromium alloy.

Images