Sheet type flow divider with low-temperature increased precision

Abstract

The utility model provides a sheet type diverter with precision increased at low temperature, relates to the technical field of diverters, and aims to solve the technical problem that the measurement precision is affected by high temperature generated by an alloy part when a direct-current diverter in the prior art works at full load or overload. A sheet type flow divider capable of increasing precision at low temperature comprises a first sampling plate, a second sampling plate and a plurality of connecting plates, the left end and the right end of each connecting plate are connected with the first sampling plate and the second sampling plate respectively, and the connecting plates are distributed between the first sampling plate and the second sampling plate at equal intervals in the front-back direction. The front end face of the connecting plate located on the foremost side is flush with the front end face of the first sampling plate and the front end face of the second sampling plate, and the rear end face of the connecting plate located on the rearmost side is flush with the rear end face of the first sampling plate and the rear end face of the second sampling plate.

Description

Technical Field

[0001] This utility model relates to the field of flow divider technology, specifically to a thin-plate flow divider with improved low-temperature accuracy. Background Technology

[0002] The DC shunt is mainly used for current monitoring and is composed of T2 copper and 6J13 copper alloy. The DC shunt includes two sampling plates and a connecting plate connecting the two sampling plates. Both sampling plates are made of T2 copper, and the connecting plate is made of 6J13 copper alloy. The connecting plate and the two sampling plates are mainly connected using an electron beam welding process. After welding, the front and rear ends of the connecting plate are stamped off, thus creating notches at the front and rear ends of the DC shunt.

[0003] When a DC shunt is operating at full load or overload, the alloy parts will generate high temperatures, which will affect the measurement accuracy of the shunt. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a thin-film shunt with improved accuracy at low temperature, so as to solve the technical problem that the alloy part of the DC shunt generates high temperature when working under full load or overload, which affects the measurement accuracy.

[0005] To solve the above-mentioned technical problems, this utility model provides a thin-film shunt with low-temperature improved accuracy, including a first sampling plate, a second sampling plate and several connecting plates. Each connecting plate is connected to the first sampling plate and the second sampling plate at its left and right ends respectively. The several connecting plates are distributed at equal intervals between the first sampling plate and the second sampling plate in the front-back direction. The front end face of the connecting plate located at the foremost side is flush with the front end face of the first sampling plate and the front end face of the second sampling plate, and the rear end face of the connecting plate located at the rearmost side is flush with the rear end face of the first sampling plate and the rear end face of the second sampling plate.

[0006] With the above structure, the thin-plate shunt with improved accuracy at low temperature of this utility model has the following advantages: the first sampling plate and the second sampling plate are connected by several connecting plates. The total cross-sectional area of ​​the connecting plates is kept the same as that of the connecting plates in the prior art. However, setting several connecting plates increases the total heat dissipation area of ​​the connecting plates, thus reducing the temperature of the connecting plates during operation and preventing the alloy part from generating high temperature when the shunt is working at full load or overload, thereby improving the measurement accuracy.

[0007] As an improvement, the first sampling plate is provided with several current input holes along the front-to-back direction, and the second sampling plate is provided with several current output holes along the front-to-back direction. With this structure, multiple current input holes and current output holes are provided to ensure the stability and replaceability of the input and output.

[0008] As an improvement, several current input holes and several current output holes are symmetrically distributed from left to right; this structure ensures accurate positioning between the current input holes and the current output holes.

[0009] As an improvement, the first sampling plate is provided with a first sampling component, and the second sampling plate is provided with a second sampling component.

[0010] As an improvement, the first sampling assembly includes a first connecting block and a first fixing bolt. The first connecting block is inserted into the first sampling plate, and the first fixing bolt is threadedly connected to the first connecting block. The second sampling assembly includes a second connecting block and a second fixing bolt. The second connecting block is inserted into the second sampling plate, and the second fixing bolt is threadedly connected to the second connecting block. With this structure, by setting the first and second connecting blocks, the conductivity between the sampling line and the ammeter is enhanced, and the sampling point is separated from the first and second sampling plates, replacing the traditional connecting piece, thus ensuring the accuracy of sampling and significantly improving the accuracy level of the shunt.

[0011] As an improvement, the first sampling assembly further includes a first gasket sleeved on the first fixing bolt and located above the first connecting block, and the second sampling assembly further includes a second gasket sleeved on the second fixing bolt and located above the second connecting block; this structure improves the stability of the connection between the first sampling assembly, the second sampling assembly and the sampling line.

[0012] As an improvement, the first sampling component and the second sampling component are arranged symmetrically from left to right.

[0013] As an improvement, there are four connecting plates. Attached Figure Description

[0014] Figure 1 This is a top view of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the first sampling plate and the second sampling plate in this utility model.

[0016] Figure 3 This is a cross-sectional view of the present invention.

[0017] Reference numerals: 1. First sampling plate; 2. Second sampling plate; 3. Connecting plate; 4. Current input hole; 5. Current output hole; 6. First sampling assembly; 61. First connecting block; 62. First fixing bolt; 63. First gasket; 7. Second sampling assembly; 71. Second connecting block; 72. Second fixing bolt; 73. Second gasket. Detailed Implementation

[0018] The following is a detailed description of a thin-plate shunt with improved low-temperature accuracy, in conjunction with the accompanying drawings.

[0019] like Figures 1 to 3 As shown, a thin-film shunt with low-temperature elevation accuracy includes a first sampling plate 1, a second sampling plate 2, and several connecting plates 3. Each connecting plate 3 is connected to the first sampling plate 1 and the second sampling plate 2 at its left and right ends respectively. The several connecting plates 3 are evenly distributed between the first sampling plate 1 and the second sampling plate 2 along the front-back direction. Figure 1 and Figure 2 As shown, the front end face of the connecting plate 3 located at the frontmost side is flush with the front end face of the first sampling plate 1 and the front end face of the second sampling plate 2, and the rear end face of the connecting plate 3 located at the rearmost side is flush with the rear end face of the first sampling plate 1 and the rear end face of the second sampling plate 2.

[0020] In this embodiment, there are four connecting plates 3. The first sampling plate 1 and the second sampling plate 2 are both made of T2 copper, and the connecting plates 3 are all made of 6J13 copper alloy.

[0021] The first sampling plate 1 and the second sampling plate 2 are connected by several connecting plates 3. The total cross-sectional area of ​​the connecting plates 3 is the same as that of the connecting plates 3 in the prior art. However, setting several connecting plates 3 increases the total heat dissipation area of ​​the connecting plates 3, thereby reducing the temperature of the connecting plates 3 during operation and preventing the alloy part from generating high temperature when the shunt is under full load or overload, thus improving the measurement accuracy.

[0022] Furthermore, the connecting plates 3 in this utility model are stamped from a single connecting plate 3. That is, an entire connecting plate 3 is first connected to the first sampling plate 1 and the second sampling plate 2 using an electron beam welding process to form a thin sheet structure. Therefore, it can be ensured that the front end face of the entire connecting plate 3 is flush with the front end face of the first sampling plate 1 and the front end face of the second sampling plate 2, and the rear end face is flush with the rear end face of the first sampling plate 1 and the rear end face of the second sampling plate 2. Then, the entire connecting plate 3 is stamped to obtain a plurality of connecting plates 3 arranged at intervals along the front and rear sides. The front end face of the connecting plate 3 located at the frontmost side is flush with the front end face of the first sampling plate 1 and the front end face of the second sampling plate 2, and the rear end face of the connecting plate 3 located at the rearmost side is flush with the rear end face of the first sampling plate 1 and the rear end face of the second sampling plate 2.

[0023] like Figure 1 and Figure 2 As shown, the first sampling plate 1 has a plurality of current input holes 4 along the front-back direction, and the second sampling plate 2 has a plurality of current output holes 5 along the front-back direction. That is to say, the center line connecting the plurality of current input holes 4 is set along the front-back direction. Similarly, the center line connecting the plurality of current output holes 5 is also set along the front-back direction. The distribution of the plurality of current input holes 4 on the first sampling plate 1 makes the first sampling plate 1 have a front-back symmetrical structure, and the distribution of the plurality of current output holes 5 on the second sampling plate 2 makes the second sampling plate 2 have a front-back symmetrical structure.

[0024] In addition, several current input holes 4 and several current output holes 5 are symmetrically distributed from left to right. In this embodiment, there are two current input holes 4 and two current output holes 5. That is to say, one current input hole 4 and one current output hole 5 are symmetrically arranged from left to right, and the other current input hole 4 and the other current output hole 5 are symmetrically arranged from left to right to ensure accurate positioning.

[0025] like Figure 1 and Figure 3 As shown, the first sampling plate 1 is provided with a first sampling component 6, and the second sampling plate 2 is provided with a second sampling component 7. The first sampling component 6 and the second sampling component 7 are arranged symmetrically from left to right.

[0026] like Figure 3 As shown, the first sampling assembly 6 includes a first connecting block 61 and a first fixing bolt 62. The first connecting block 61 is inserted into the first sampling plate 1, and the first fixing bolt 62 is threadedly connected to the first connecting block 61. The second sampling assembly 7 includes a second connecting block 71 and a second fixing bolt 72. The second connecting block 71 is inserted into the second sampling plate 2, and the second fixing bolt 72 is threadedly connected to the second connecting block 71. The first sampling assembly 6 also includes a first gasket 63 sleeved on the first fixing bolt 62 and located above the first connecting block 61. The second sampling assembly 7 also includes a second gasket 73 sleeved on the second fixing bolt 72 and located above the second connecting block 71.

[0027] Both the first connecting block 61 and the second connecting block 71 are made of copper pads, which enhances the conductivity between the sampling line and the ammeter; the sampling point is separated from the first sampling plate 1 and the second sampling plate 2, replacing the traditional connecting piece, which ensures the accuracy of sampling and significantly improves the accuracy level of the shunt; in addition, the shunt in this utility model has a left-right symmetrical and front-back symmetrical structure, which reduces the influence of external electromagnetic field interference on the signal.

[0028] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiment. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A thin-plate shunt with low-temperature rise accuracy, characterized in that, It includes a first sampling plate (1), a second sampling plate (2) and several connecting plates (3). Each connecting plate (3) is connected to the first sampling plate (1) and the second sampling plate (2) at its left and right ends respectively. Several connecting plates (3) are distributed at equal intervals between the first sampling plate (1) and the second sampling plate (2) in the front-back direction. The front end face of the connecting plate (3) located at the frontmost side is flush with the front end face of the first sampling plate (1) and the front end face of the second sampling plate (2). The rear end face of the connecting plate (3) located at the rearmost side is flush with the rear end face of the first sampling plate (1) and the rear end face of the second sampling plate (2).

2. The thin-plate shunt with low-temperature rise accuracy according to claim 1, characterized in that, The first sampling plate (1) has several current input holes (4) along the front-back direction, and the second sampling plate (2) has several current output holes (5) along the front-back direction.

3. The thin-plate shunt with low-temperature rise accuracy according to claim 2, characterized in that, The current input holes (4) and the current output holes (5) are symmetrically distributed from left to right.

4. The thin-plate shunt with low-temperature rise accuracy according to claim 1, characterized in that, The first sampling plate (1) is provided with a first sampling component (6), and the second sampling plate (2) is provided with a second sampling component (7).

5. The thin-plate shunt with low-temperature rise accuracy according to claim 4, characterized in that, The first sampling component (6) includes a first connecting block (61) and a first fixing bolt (62). The first connecting block (61) is inserted into the first sampling plate (1), and the first fixing bolt (62) is threadedly connected to the first connecting block (61). The second sampling component (7) includes a second connecting block (71) and a second fixing bolt (72). The second connecting block (71) is inserted into the second sampling plate (2), and the second fixing bolt (72) is threadedly connected to the second connecting block (71).

6. The thin-plate shunt with low-temperature rise accuracy according to claim 5, characterized in that, The first sampling assembly (6) further includes a first gasket (63) sleeved on the first fixing bolt (62) and located above the first connecting block (61), and the second sampling assembly (7) further includes a second gasket (73) sleeved on the second fixing bolt (72) and located above the second connecting block (71).

7. The thin-plate shunt with low-temperature rise accuracy according to claim 4, characterized in that, The first sampling component (6) and the second sampling component (7) are arranged symmetrically from left to right.

8. The thin-plate shunt with low-temperature rise accuracy according to claim 1, characterized in that, There are four connecting plates (3).

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