Current detection device of shunt resistor

Abstract

The utility model relates to the technical field of current detection devices, in particular to a current detection device of a shunt resistor, which comprises an outer shell, a sealing cover and detection lines, the top of the outer shell is fixedly connected with the sealing cover, the left side and the right side of the outer shell are fixedly connected with the detection lines, and the front half part of the bottom of the inner side of the outer shell is fixedly connected with an ampere meter. The top of the ampere meter is fixedly connected with a control screen, and the outer side of the control screen is attached to the sealing cover. The device can adjust the measurement range through the shunt resistor, the hydraulic block, the clamping block, the limiting assembly, the adjusting assembly, the threaded rod, the sliding rod and the small motor; therefore, the magnitude of the measured current is larger than two thirds of the maximum value of the measuring range of the device, the measuring error of the device is small, the measuring accuracy of the device is high, the shunting resistor can be rapidly disassembled and assembled, and the shunting resistor can be conveniently maintained or replaced.

Description

Technical Field

[0001] This utility model relates to the technical field of current detection devices, specifically a current detection device for a shunt resistor. Background Technology

[0002] A current detection device can measure the magnitude of current in a closed circuit. The core component of a current detection device is an ammeter. However, the ammeter has a limited measurement range. Therefore, the current detection device uses a shunt resistor connected in parallel with the ammeter to shunt the current, thereby adjusting the measurement range of the current detection device.

[0003] In the prior art, current detection devices connect an ammeter in parallel with a shunt resistor with a fixed resistance value. Therefore, the measurement range of the current detection device is fixed. When the magnitude of the measured current is greater than two-thirds of the maximum measurement value of the current detection device, the measurement error is small. However, some existing current detection devices for shunt resistors cannot adjust the measurement range, resulting in poor measurement accuracy. Therefore, a current detection device for a shunt resistor is proposed to address the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a current detection device for shunt resistors, so as to solve the problem that the current detection devices for some existing shunt resistors cannot adjust the measurement range, resulting in poor measurement accuracy.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A current detection device for a shunt resistor includes a housing, a sealing cover, and detection circuitry. The sealing cover is fixedly connected to the top of the housing. Detection circuitry is fixedly connected to both the left and right sides of the housing. An ammeter is fixedly connected to the front half of the bottom inner side of the housing, and a control panel is fixedly connected to the top of the ammeter. The outer side of the control panel is flush with the sealing cover. A positioning seat is fixedly connected to the rear half of the bottom inner side of the housing, and a shunt resistor is mounted on the top of the positioning seat. Two hydraulic blocks are fixedly connected to the bottom inner side of the housing, and engaging blocks are fixedly connected to the opposite inner sides of each hydraulic block. The engaging blocks engage with the shunt resistor. Two limiting components and an adjusting component are provided on the lower side of the sealing cover. The adjusting component is located between the two limiting components. Each limiting component includes a limiting block, a fixing block, and a first locking block. Fixing blocks are fixedly connected to both the front and rear sides of the limiting block. Each of the two limiting blocks is fixedly connected to a first locking block on its opposite outer side. The top of the fixed block is fixedly connected to the sealing cover. The adjusting assembly includes an adjusting block, a sliding block, and a second locking block. Sliding blocks are fixedly connected to both the front and rear sides of the adjusting block, and second locking blocks are fixedly connected to both the left and right sides of the adjusting block. The top of the sliding block is slidably connected to the sealing cover. A threaded rod is rotatably connected to the middle position of the two limiting blocks. The threaded rod is helically connected to the adjusting block. Two sliding rods are fixedly connected between the two limiting blocks. The sliding rods are slidably connected to the adjusting block. A small motor is fixedly connected to the left side of the left limiting block. The right spindle of the small motor is fixedly connected to the threaded rod. An infrared ranging transmitter is fixedly connected to the top of the left limiting block. An infrared ranging receiver is fixedly connected to the top of the adjusting block. The infrared ranging receiver is located to the right of the infrared ranging transmitter.

[0007] Preferably, the input and output terminals of the ammeter are electrically connected to the detection circuit, the shunt resistor is connected in parallel with the ammeter, and the control panel is electrically connected to the ammeter, the hydraulic block, the small motor, the infrared ranging transmitter, and the infrared ranging receiver.

[0008] Preferably, the top of the positioning seat is provided with a positioning groove, the shunt resistor is a sliding rheostat, the hydraulic block and the locking block are symmetrically distributed left and right, and the threaded rod and the sliding rod are horizontally distributed in the left and right directions.

[0009] Preferably, the limiting block has a rotating slot at the middle position, the bottom of the limiting block is in contact with the shunt resistor, and the inner sides of the two first locking blocks are respectively in contact with the left and right sides of the shunt resistor.

[0010] Preferably, the adjusting block has a threaded hole in the middle, and the front and rear halves of the adjusting block are provided with sliding groove holes. The bottom of the adjusting block is in contact with the slider of the shunt resistor, and the inner sides of the two second locking blocks are in contact with the slider of the shunt resistor.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this invention, by incorporating a shunt resistor, hydraulic block, locking block, limiting component, adjusting component, threaded rod, sliding rod, and small motor, the device can adjust the measurement range, thereby ensuring that the measured current is greater than two-thirds of the maximum value of the device's measurement range. The device has a small measurement error and high measurement accuracy. Furthermore, the device allows for quick assembly and disassembly of the shunt resistor, facilitating convenient maintenance or replacement of the shunt resistor. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the ammeter mounting structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the threaded rod installation structure of this utility model;

[0017] Figure 5 This is a schematic diagram of the limiting component structure of this utility model;

[0018] Figure 6 This is a schematic diagram of the adjustment component structure of this utility model.

[0019] In the diagram: 1. Outer shell; 2. Sealing cover; 3. Detection circuit; 4. Ammeter; 5. Control panel; 6. Positioning seat; 7. Shunt resistor; 8. Hydraulic block; 9. Locking block; 10. Limiting component; 11. Adjusting component; 12. Threaded rod; 13. Sliding rod; 14. Small motor; 15. Infrared ranging transmitter; 16. Infrared ranging receiver; 1001. Limiting block; 1002. Fixing block; 1003. First locking block; 1101. Adjusting block; 1102. Sliding block; 1103. Second locking block. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0022] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0023] Please see Figure 1-6 This utility model provides a technical solution:

[0024] A current detection device for a shunt resistor includes a housing 1, a sealing cover 2, and detection circuits 3. The sealing cover 2 is fixedly connected to the top of the housing 1, and detection circuits 3 are fixedly connected to both the left and right sides of the housing 1. An ammeter 4 is fixedly connected to the front half of the bottom inner side of the housing 1, and a control panel 5 is fixedly connected to the top of the ammeter 4. The outer side of the control panel 5 is fitted to the sealing cover 2. A positioning seat 6 is fixedly connected to the rear half of the bottom inner side of the housing 1, and a shunt resistor 7 is provided on the top of the positioning seat 6. Two hydraulic blocks 8 are fixedly connected to the surface. Each hydraulic block 8 has a locking block 9 fixedly connected to its inner side. The locking block 9 engages with the shunt resistor 7. The lower side of the sealing cover 2 is provided with two limiting components 10 and one adjusting component 11. The adjusting component 11 is located between the two limiting components 10. Each limiting component 10 includes a limiting block 1001, a fixing block 1002, and a first locking block 1003. Fixing blocks 1002 are fixedly connected to both the front and rear sides of the limiting block 1001, and the first locking block 1003 is fixedly connected to the outer sides of the two limiting blocks 1001. A locking block 1003 is fixedly connected to the top of the fixing block 1002 and the sealing cover 2. The adjusting assembly 11 includes an adjusting block 1101, a sliding block 1102, and a second locking block 1103. Sliding blocks 1102 are fixedly connected to both the front and rear sides of the adjusting block 1101, and second locking blocks 1103 are fixedly connected to both the left and right sides of the adjusting block 1101. The top of the sliding block 1102 is slidably connected to the sealing cover 2. A threaded rod 12 is rotatably connected to the middle position of the two limiting blocks 1001. The threaded rod 12 and the adjusting block 1102 are rotatably connected to the sealing cover 2. 1. A spiral connection is used. Two sliding rods 13 are fixedly connected between the two limiting blocks 1001. The sliding rods 13 and the adjusting block 1101 are slidably connected. A small motor 14 is fixedly connected to the left side of the limiting block 1001 on the left side. The main shaft of the small motor 14 and the threaded rod 12 are fixedly connected to the right side. An infrared ranging transmitter 15 is fixedly connected to the top of the limiting block 1001 on the left side. An infrared ranging receiver 16 is fixedly connected to the top of the adjusting block 1101. The infrared ranging receiver 16 is located to the right of the infrared ranging transmitter 15.

[0025] The input and output terminals of ammeter 4 are electrically connected to detection circuit 3, respectively. Shunt resistor 7 is connected in parallel with ammeter 4. Control panel 5 is electrically connected to ammeter 4, hydraulic block 8, small motor 14, infrared ranging transmitter 15, and infrared ranging receiver 16, respectively. The hydraulic block 8, small motor 14, infrared ranging transmitter 15, and infrared ranging receiver 16 can be adjusted via control panel 5. Positioning seat 6 has a positioning groove on its top. Shunt resistor 7 is a sliding rheostat. Hydraulic block 8 and locking block 9 are symmetrically distributed left and right. Threaded rod 12 and sliding rod 13 are horizontally distributed left and right. Threaded rod 12 can drive adjusting block 1101 to move left and right. Limiting... A rotating slot is provided in the middle of block 1001. The bottom of the limiting block 1001 is in contact with the shunt resistor 7. The inner sides of the two first locking blocks 1003 are in contact with the left and right sides of the shunt resistor 7, respectively. The threaded rod 12 and the sliding rod 13 can be limited by the limiting component 10. A threaded hole is provided in the middle of adjusting block 1101. The front and rear halves of adjusting block 1101 are provided with sliding slots. The bottom of adjusting block 1101 is in contact with the slider of the shunt resistor 7. The inner sides of the two second locking blocks 1103 are in contact with the slider of the shunt resistor 7, respectively. The slider of the shunt resistor 7 can be moved left and right by the adjusting component 11.

[0026] Workflow: The sealing cover 2 of this device can be installed on the top of the outer casing 1 or removed. The control panel 5 of this device has a rechargeable power supply inside. The control panel 5 is electrically connected to the ammeter 4, hydraulic block 8, small motor 14, infrared ranging transmitter 15, and infrared ranging receiver 16. Manual operation of the control panel 5 can adjust the operating status of the ammeter 4, hydraulic block 8, small motor 14, infrared ranging transmitter 15, and infrared ranging receiver 16. The shunt resistor 7 of this device is an existing component. The slide rod of the shunt resistor 7 has sliding rod terminals on both the left and right ends, and the resistance wire of the shunt resistor 7 has resistance wire terminals on both the left and right ends. All of the above are existing technologies. First, electrically connect the resistance wire terminal on the left side of the shunt resistor 7 to the input terminal of the ammeter 4, and electrically connect the sliding rod terminal on the right side of the shunt resistor 7 to the output terminal of the ammeter 4. The left half of the resistance wire of the shunt resistor 7 is connected to the detection circuit. When using this device, connect the two detection lines 3 in series to the circuit under test. Adjust the small motor 14 through the control panel 5 to make the small motor 14 drive the threaded rod 12 to rotate. Since the limit component 10 limits the threaded rod 12 and the sliding rod 13, the threaded rod 12 and the sliding rod 13 cannot move left or right. Therefore, the rotation of the threaded rod 12 can drive the adjustment component 11 to slide left and right. The limit component can be measured by the infrared ranging transmitter 15 and the infrared ranging receiver 16. By determining the distance between component 10 and adjustment assembly 11, the length of the resistance wire of the shunt resistor 7 connected to the detection circuit can be determined. Since the total length and total resistance of the shunt resistor 7 are known, the resistance value of the shunt resistor 7 connected to the detection circuit can be calculated using control panel 5. Given the original measurement range of ammeter 4, and combining this with the resistance value of the shunt resistor 7 connected to the detection circuit, control panel 5 can calculate the actual measurement range of the device. Furthermore, combining this with the original data measured by ammeter 4, control panel 5 can further calculate the actual current of the circuit under test. Control panel 5 can then display the actual measurement range of the device and the actual current of the circuit under test. If the actual current of the circuit under test... If the current is much smaller than the maximum value of the actual measurement range of the device, the error will be large, and the resistance value of the shunt resistor 7 connected to the detection circuit needs to be readjusted. If the actual current of the circuit under test is greater than two-thirds of the maximum value of the actual measurement range of the device, the error will be small, and the measurement result will be usable. If the shunt resistor 7 needs maintenance or replacement, the hydraulic block 8 can be retracted through the control panel 5, so that the hydraulic block 8 drives the two locking blocks 9 away from each other, and the shunt resistor 7 can be removed from the upper side of the positioning seat 6. The measurement range of the device can be adjusted so that the magnitude of the measured current is greater than two-thirds of the maximum value of the measurement range of the device. The measurement error of the device is small, and the measurement accuracy of the device is high.

[0027] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Standard parts used in this invention can all be purchased commercially, and irregularly shaped parts can be custom-made according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are already mature technologies. The machinery, parts, and equipment all use conventional models from the prior art, and the circuit connections also employ conventional connection methods from the prior art, which will not be detailed here.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A current detection device for a shunt resistor, comprising a housing (1), a sealing cap (2), and a detection circuit (3), characterized in that: A sealing cap (2) is fixedly connected to the top of the outer casing (1). Detection circuits (3) are fixedly connected to both the left and right sides of the outer casing (1). An ammeter (4) is fixedly connected to the front half of the bottom inner side of the outer casing (1). A control panel (5) is fixedly connected to the top of the ammeter (4). The outer side of the control panel (5) is fitted to the sealing cap (2). A positioning seat (6) is fixedly connected to the rear half of the bottom inner side of the outer casing (1). A shunt resistor (7) is provided on the top of the positioning seat (6). Two hydraulic blocks (8) are fixedly connected to the bottom inner side of the outer casing (1). The phase of the hydraulic blocks (8) The inner side is fixedly connected with a locking block (9), which engages with the shunt resistor (7). The lower side of the sealing cover (2) is provided with two limiting components (10) and an adjusting component (11). The adjusting component (11) is located between the two limiting components (10). The limiting component (10) includes a limiting block (1001), a fixing block (1002), and a first locking block (1003). The front and rear sides of the limiting block (1001) are fixedly connected with fixing blocks (1002), and the opposite outer sides of the two limiting blocks (1001) are fixedly connected with first locking blocks (1003). The top of the block (1002) is fixedly connected to the sealing cap (2). The adjusting assembly (11) includes an adjusting block (1101), a sliding block (1102), and a second locking block (1103). Sliding blocks (1102) are fixedly connected to both the front and rear sides of the adjusting block (1101). Second locking blocks (1103) are fixedly connected to both the left and right sides of the adjusting block (1101). The top of the sliding block (1102) is slidably connected to the sealing cap (2). A threaded rod (12) is rotatably connected to the middle position of the two limiting blocks (1001). The threaded rod (12) and the adjusting block (1101) are spirally connected. Next, two sliding rods (13) are fixedly connected between the two limiting blocks (1001). The sliding rods (13) and the adjusting block (1101) are slidably connected. A small motor (14) is fixedly connected to the left side of the limiting block (1001) on the left side. The main shaft and threaded rod (12) on the right side of the small motor (14) are fixedly connected. An infrared ranging transmitter (15) is fixedly connected to the top of the limiting block (1001) on the left side. An infrared ranging receiver (16) is fixedly connected to the top of the adjusting block (1101). The infrared ranging receiver (16) is located to the right of the infrared ranging transmitter (15).

2. The current detection device for a shunt resistor according to claim 1, characterized in that: The input and output terminals of the ammeter (4) are electrically connected to the detection line (3) respectively. The shunt resistor (7) is connected in parallel with the ammeter (4). The control panel (5) is electrically connected to the ammeter (4), the hydraulic block (8), the small motor (14), the infrared ranging transmitter (15), and the infrared ranging receiver (16) respectively.

3. The current detection device for a shunt resistor according to claim 1, characterized in that: The top of the positioning seat (6) is provided with a positioning groove, the shunt resistor (7) is a sliding rheostat, the hydraulic block (8) and the locking block (9) are symmetrically distributed on the left and right, and the threaded rod (12) and the sliding rod (13) are horizontally distributed in the left and right directions.

4. The current detection device for a shunt resistor according to claim 1, characterized in that: The limiting block (1001) has a rotating slot in the middle position. The bottom of the limiting block (1001) is in contact with the shunt resistor (7). The inner sides of the two first locking blocks (1003) are respectively in contact with the left and right sides of the shunt resistor (7).

5. The current detection device for a shunt resistor according to claim 1, characterized in that: The adjusting block (1101) has a threaded hole in the middle position. The front half and the rear half of the adjusting block (1101) are both provided with sliding groove holes. The bottom of the adjusting block (1101) is in contact with the slider of the shunt resistor (7). The inner sides of the two second locking blocks (1103) are in contact with the slider of the shunt resistor (7).

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