Sheet-type precise diverter

Abstract

The utility model provides a sheet-type precision shunt, which comprises support bases, a shunt metal sheet, a large-current lead and a detection arc-extinguishing structure, the shunt metal sheet is fixedly mounted between the two groups of support bases, the large-current lead is fixedly mounted on the two groups of support bases, and the detection arc-extinguishing structure is positioned on the outer sides of the support bases and the shunt metal sheet; insulating bases are fixedly installed below the supporting base, the insulating bases are fixedly installed at the two ends of an installing base, and the installing base is fixedly installed in a circuit case. According to the utility model, the support base and the detection arc extinguishing structure are arranged, so that the detection precision is not influenced by the generated current, and the measuring equipment can be accurately, rapidly and stably contacted with a monitoring point.

Description

Technical Field

[0001] This utility model relates to the field of shunt technology, and in particular to a plate-type precision shunt. Background Technology

[0002] With the rapid development of power systems and industrial automation, higher requirements have been placed on the accuracy and reliability of current measurement. In fields such as power distribution, equipment monitoring and motor control, the ability to accurately measure high current has become the key to achieving safe and efficient operation.

[0003] Traditional current measurement methods include direct and indirect methods. Direct measurement uses an ammeter connected in series in the circuit and is suitable for low-current environments. However, in high-current applications, direct measurement can not only pose safety hazards but also damage equipment. Under high-current conditions, electric arcs may form between the metal plates of the shunt, which can damage the equipment and interfere with the measurement signal. The formation of arcs also prevents the shunt from providing accurate measurement results under transient current peaks or short-circuit conditions.

[0004] Therefore, it is essential to invent a plate-type precision shunt. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a plate-type precision shunt, solving the issue that existing shunts still suffer from the problem of detection accuracy being easily affected by generated current, and the inability to accurately and quickly establish stable contact between the measuring device and the monitoring point. A plate-type precision shunt includes a support base, a shunt metal plate, a high-current conductor, and a detection arc-extinguishing structure. The shunt metal plate is fixedly installed between two sets of support bases, and the high-current conductor is fixedly installed on both sets of support bases. The detection arc-extinguishing structure is located outside the support base and the shunt metal plate.

[0006] An insulating base is fixedly installed below the support base, and the insulating base is fixedly installed at both ends of the mounting base, which is fixedly installed inside the circuit chassis.

[0007] The support base includes a pressing base block and a mounting base groove, and the mounting base groove is provided below the pressing base block. A diversion metal sheet is slidably installed inside the mounting base groove; the pressing base blocks are pressed together by bolts.

[0008] The surface of the topmost piece of the press-fit base is fixedly equipped with a high-current connection point and a detection point, and the high-current connection point is connected to a high-current wire. The surface of the detection point is fixedly equipped with a detection positioning seat.

[0009] The detection arc-extinguishing structure comprises an insulating support rod, a support plate, a spray head, a multi-directional spray nozzle and a gas input pipe, the insulating support rod is fixedly installed on the surface of the installation base, and the two ends of the support plate are fixedly connected with the insulating support rod; the spray head is fixedly installed in the middle of the support plate, the multi-directional spray nozzle is arranged in the spray head, and the gas input pipe is connected with the spray head.

[0010] The installation base groove in the support base adopts a set of grooves matched with the shunt metal sheet, and the shunt metal sheet in the installation base groove can be compressed and fixed by the close compression between the base blocks; the detection point position adopts two sets, the detection positioning seat above adopts two sets of metal seats which are obliquely inclined upwards, a deep groove is arranged in the detection positioning seat, and the groove in the detection positioning seat can insert the binding post of the measuring table, which has the following effects: ① structural support: the support base provides basic physical support for the shunt, and ensures that the shunt metal sheet and other components are stably fixed in the appropriate position; ② measurement accuracy: the detection positioning seat provides a fixed and accurate position for measuring instruments such as ammeters or voltmeters, so that the measurement contact point can be accurately docked, thereby improving the measurement accuracy and consistency; ③ preventing poor contact: the detection positioning seat can effectively prevent the poor contact between the measuring instrument and the shunt metal sheet by providing a stable contact surface, thereby reducing the error caused by poor contact.

[0011] The spray head and the multi-directional spray nozzle in the detection arc-extinguishing structure are directed towards the shunt metal sheet, and the multi-directional spray nozzle can cover all the metal pieces in the support base; the gas input pipe adopts a rubber pipe, one end of the gas input pipe is connected with a gas tank, the gas tank at one end of the gas input pipe is filled with compressed sulfur hexafluoride gas, and has the following effects: ① arc-extinguishing protection: when the shunt works at high current, arcs may be generated between the metal sheets. The detection arc-extinguishing structure can effectively inhibit or eliminate the formation of arcs, thereby protecting the equipment and elements from damage caused by arcs; ② promoting stable work: a temporary sulfur hexafluoride gas group can be formed outside the equipment during detection, no arc is generated in the gas group, and the sulfur hexafluoride gas can quickly cool and extinguish the arc when the arc occurs, which greatly shortens the duration of the arc in the presence of the gas group, thereby reducing the interference of the arc on the measurement signal.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The support base is provided with the following effects: ① structural support: the support base provides basic physical support for the shunt, ensuring that the shunt metal sheet and other components are stably fixed in the appropriate position; ② measurement accuracy: the detection positioning seat provides a fixed and accurate position for measuring instruments such as ammeters or voltmeters, enabling accurate docking of the measurement contact point and improving measurement accuracy and consistency; ③ prevent poor contact: by providing a stable contact surface, the detection positioning seat can effectively prevent poor contact between the measuring instrument and the shunt metal sheet, reducing errors caused by poor contact.

[0014] 2. The detection arc extinguishing structure is provided with the following effects: ① arc extinguishing protection: when the shunt is working at high current, arcs may occur between the metal sheets. The detection arc extinguishing structure can effectively suppress or eliminate the formation of arcs, thereby protecting the equipment and components from damage caused by arcs; ② promote stable operation: a temporary sulfur hexafluoride gas group can be formed on the outside of the equipment during detection, and no arc will occur in the gas group. The sulfur hexafluoride gas can quickly cool and extinguish the arc when it occurs, which greatly shortens the duration of the arc in the presence of the gas group, thereby reducing the interference of the arc on the measurement signal. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of the utility model.

[0016] Figure 2 is an enlarged view of A of the utility model.

[0017] Figure 3 is an enlarged view of B of the utility model.

[0018] In the figure:

[0019] mounting base 1, insulating base 2, support base 3, compression base block 31, mounting base groove 32, large current connection point 33, detection point 34, detection positioning seat 35, shunt metal sheet 4, large current wire 5, detection arc extinguishing structure 6, insulating support rod 61, support plate 62, spray head 63, multi-directional spray nozzle 64, gas input pipe 65. DETAILED DESCRIPTION

[0020] In order to enable personnel in the technical field to better understand the utility model scheme, the technical scheme in the utility model embodiment will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the utility model.

[0021] As shown in the accompanying drawingsFigure 1 to the attached Figure 3 as shown.

[0022] The utility model provides a kind of sheet precision shunt, including support pedestal 3, shunt metal sheet 4, large current wire 5 and detect arc extinguishing structure 6, wherein:shunt metal sheet 4 is fixedly installed between two groups of support pedestal 3, and large current wire 5 is fixedly installed on two groups of support pedestal 3, and the detect arc extinguishing structure 6 is located the outside of support pedestal 3 and shunt metal sheet 4.

[0023] The lower side of support pedestal 3 is fixedly installed with insulating pedestal 2, and the insulating pedestal 2 is fixedly installed at both ends of mounting pedestal 1, and the mounting pedestal 1 is fixedly installed inside circuit cabinet.

[0024] Support pedestal 3 includes pressing base block 31 and installation base groove 32, and the lower side of pressing base block 31 is provided with installation base groove 32, and the inside of installation base groove 32 is slidably installed with shunt metal sheet 4;The pressing base block 31 is installed together by bolt pressing.

[0025] The surface of one piece of the top end of pressing base block 31 is fixedly installed with large current connection point 33 and detection point 34, and the large current connection point 33 is connected with large current wire 5, and the surface of the detection point 34 is fixedly installed with detection positioning seat 35.

[0026] The detect arc extinguishing structure 6 includes insulating support rod 61, support plate 62, spray head 63, multi-directional spray port 64 and gas input pipe 65, and the insulating support rod 61 is fixedly installed on the surface of mounting pedestal 1, and the both ends of the support plate 62 are connected and fixed with the insulating support rod 61;The spray head 63 is fixedly installed in the middle of support plate 62, and the multi-directional spray port 64 is arranged in the inside of spray head 63, and the gas input pipe 65 is connected with spray head 63.

[0027] The installation base groove 32 inside support pedestal 3 adopts a group of grooves matched with shunt metal sheet 4, and the shunt metal sheet 4 inside installation base groove 32 can be pressed tightly by the proximity between pressing base block 31;The detection point 34 adopts two groups, and the detection positioning seat 35 above it adopts two groups of metal seats inclined upward;A deep groove is arranged in the inside of detection positioning seat 35, and the groove in the inside of detection positioning seat 35 can make the binding post of measuring table insert.

[0028] The spray head 63 and multi-directional spray port 64 inside detect arc extinguishing structure 6 are towards shunt metal sheet 4, and the multi-directional spray port 64 can cover all metal pieces inside support pedestal 3;The gas input pipe 65 adopts a rubber pipe, and a gas tank is connected to one end of the gas input pipe 65, and compressed sulfur hexafluoride gas is filled in the inside of the gas tank at one end of the gas input pipe 65.

[0029] Chip precision shunt is a device used to measure current, commonly applied in high current and high precision circuit systems. Its working principle is as follows:

[0030] 1. Basic structure

[0031] Chip precision shunt is mainly composed of the following parts:

[0032] Support base 3: provides support and fixation for the shunt.

[0033] Shunt metal sheet 4: as the shunt path of current, responsible for converting the passing current into measurable voltage.

[0034] Large current wire 5: connected to the power supply and load, conducting large current.

[0035] Detection arc extinguishing structure 6: by forming an insulating gas group or spraying gas, suppressing the generation of arc.

[0036] 2. Current shunt

[0037] When current passes through the large current wire 5, part of the current will flow through the shunt metal sheet 4. According to Ohm's law, V=I×R, the voltage V on the shunt metal sheet is proportional to the passing current I, and R is the resistance value of the shunt metal sheet. By measuring the voltage across the shunt metal sheet, the current flowing through the metal sheet can be calculated, and the current value in the large current wire can be indirectly obtained.

[0038] 3. Detection and measurement

[0039] When the shunt is working, the measuring instrument will be connected to the detection point of the shunt metal sheet 4. In order to ensure the accuracy of measurement, the detection positioning seat 35 provides a stable contact position for the measuring device, reducing the possibility of poor contact. During the measurement process, the change of current will cause the change of voltage across the shunt metal sheet, thereby realizing the real-time monitoring of current.

[0040] 4. Arc suppression

[0041] In high current applications, arc may occur between the shunt metal sheets. For this purpose, the detection arc extinguishing structure 6 is designed to form a temporary gas group by spraying sulfur hexafluoride gas during detection. The excellent insulation performance and arc extinguishing ability of this gas group effectively prevent the formation of arc, ensuring the stability and accuracy of the measurement signal. The spraying of gas and the existence of gas group make the shunt work safely in high current environment, reducing signal interference.

[0042] 5. Summary

[0043] The sheet type precision shunt realizes current monitoring through voltage measurement of shunt metal sheets, and the structural design fully considers the safety of high current and the accuracy of measurement; in combination with the use of the arc extinguishing structure, the shunt can reliably work in a high-voltage and high-current environment and provide accurate current measurement results, which makes it widely applied to power, industrial automation and other occasions requiring high-precision current measurement.

[0044] The technical scheme disclosed by the utility model, or the technical scheme designed by the person skilled in the art under the inspiration of the technical scheme of the utility model, achieves the above technical effects, and falls within the protection scope of the utility model.

Claims

1. A chip precision shunt, characterized by: Including support base (3), shunt metal sheet (4), large current wire (5) and detect arc extinguishing structure (6), wherein: shunt metal sheet (4) is fixedly installed between two groups of support base (3), and large current wire (5) is fixedly installed on two groups of support base (3), and the detect arc extinguishing structure (6) is located at the outside of support base (3) and shunt metal sheet (4).

2. A chip precision shunt as defined in claim 1, characterized in that: The lower side of the support base (3) is fixedly installed with an insulating base (2), and the insulating base (2) is fixedly installed at both ends of the mounting base (1), and the mounting base (1) is fixedly installed inside the circuit cabinet.

3. A chip precision shunt as defined in claim 1, characterized in that: The support base (3) includes a compression base block (31) and a mounting base groove (32), and the lower side of the compression base block (31) is provided with the mounting base groove (32), and the shunt metal sheet (4) is slidably installed in the mounting base groove (32); the compression base block (31) is bolted together.

4. A chip precision shunt as defined in claim 3, characterized in that: The surface of one of the top ends of the compression base block (31) is fixedly installed with a large current connection point (33) and a detection point (34), and the large current connection point (33) is connected with the large current wire (5), and the surface of the detection point (34) is fixedly installed with a detection positioning seat (35).

5. A chip-type precision shunt according to claim 3, wherein: The detection arc extinguishing structure (6) includes an insulating support rod (61), a support plate (62), a spray head (63), a multi-directional spray port (64) and a gas input pipe (65), and the insulating support rod (61) is fixedly installed on the surface of the mounting base (1), and the both ends of the support plate (62) are connected and fixed with the insulating support rod (61); the spray head (63) is fixedly installed in the middle of the support plate (62), and the multi-directional spray port (64) is arranged in the spray head (63), and the gas input pipe (65) is connected with the spray head (63).

6. A chip precision shunt as defined in claim 4, characterized in that: The mounting base groove (32) in the support base (3) is matched with a group of grooves of the shunt metal sheet (4), and the shunt metal sheet (4) in the mounting base groove (32) can be compressed by the proximity between the compression base blocks (31); the detection point (34) adopts two groups, and the detection positioning seat (35) above it adopts two groups of metal seats inclined upward; a deep groove is arranged in the detection positioning seat (35), and the groove in the detection positioning seat (35) can allow the terminal post of the measuring table to be inserted.

7. A chip-type precision shunt according to claim 5, characterized in that: The spray head (63) and the multi-directional spray port (64) in the detection arc extinguishing structure (6) are directed towards the shunt metal sheet (4), and the multi-directional spray port (64) can cover all metal parts inside the support base (3); the gas input pipe (65) adopts a rubber pipe, and one end of the gas input pipe (65) is connected with a gas tank, and the gas tank inside the one end of the gas input pipe (65) is filled with compressed sulfur hexafluoride gas.

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