A device for conveniently testing DC resistance of a conductor

Abstract

The invention relates to a device for testing the direct current resistance of a conductor. The device comprises a frame, a left current terminal, a right current terminal and a lifting mechanism. A potential collecting mechanism is provided between the lifting mechanism and the frame. The potential collecting mechanism comprises a left potential terminal and a right potential terminal. The lifting mechanism is provided with a temperature sensor. The frame is provided with a resistance tester and a touch screen. The device has the advantages that the potential of the conductor is collected by the potential collecting mechanism between the lifting mechanism and the frame. Since the potential difference between different parts of the conductor is a voltage, the potential collecting mechanism is provided with a left potential terminal and a right potential terminal. By collecting the potentials at the left and right points of the conductor, the voltage on the conductor can be quickly and accurately calculated. Since the current introduced into the conductor through the left and right current terminals is a constant value, the direct current resistance of the conductor can be quickly calculated according to the magnitude of the voltage and the current.

Description

Technical Field

[0001] The invention relates to a device for testing the direct current resistance of a conductor. Background Art

[0002] Conductors are generally made of copper or aluminum and are used to conduct current or heat. The DC resistance value of a conductor is an important indicator for determining the quality of its conductive performance. Once low-quality conductors are put into use in the power grid, they will lead to problems such as large transmission power loss, increased conductor temperature, and short service life. Therefore, before being put into use in the power grid, new conductors must undergo a DC resistance test to obtain the DC resistance value of the new conductor to determine its quality; according to the relevant provisions of GB / T3048.4-2007 "Test methods for electrical properties of wires and cables Part 4 Conductor DC resistance test", the current data collection is done manually, which is time-consuming and labor-intensive, and has low testing efficiency. Summary of the Invention

[0003] The object to be achieved by the present invention is to provide a device for facilitating the DC resistance test of a conductor, thereby improving the test efficiency of the DC resistance of the conductor.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: a device for facilitating DC resistance testing of a conductor, comprising a frame, a left current terminal, a right current terminal and a lifting mechanism, wherein the left current terminal is fixedly connected to one end of the frame, and the right current terminal is movably connected to the other end of the frame, the lifting mechanism is fixedly connected to the frame and is located between the left current terminal and the right current terminal, one end of the conductor to be measured is fixedly connected to the left current terminal, and the other end of the conductor to be measured is fixedly connected to the right current terminal, and a tensile force is applied to the conductor to be measured by the movement of the right current terminal on the frame, a potential collection mechanism for collecting the voltage of the conductor to be measured is provided between the lifting mechanism and the frame, the potential collection mechanism includes a left potential terminal and a right potential terminal respectively in contact with the conductor to be measured, a temperature sensor for collecting the temperature of the conductor to be measured is provided on the lifting mechanism, a resistance tester and a touch screen are provided on the frame, the left potential terminal, the right potential terminal, the left current terminal and the right current terminal are all connected to the resistance tester, the resistance tester is communicatively connected to the touch screen, and the temperature sensor is electrically connected to the touch screen.

[0005] Preferably, the frame is provided with a base plate, the base plate is provided with a horizontal linear guide rail, the horizontal linear guide rail is provided with a horizontal slider, the right current end is fixedly connected to the horizontal slider, and the frame is provided with a first push rod for driving the horizontal slider to reciprocate on the horizontal linear guide rail.

[0006] Preferably, the first push rod is arranged on the frame below the base plate, the first push rod is provided with a slide plate connected to the horizontal slider, the base plate is provided with a slide groove matching the slide plate, and the slide plate is provided with a reinforcing rib connected to the horizontal slider.

[0007] Preferably, the left current end and the right current end both include a base, a lower pressure plate and an upper pressure plate, the base is provided with a second push rod connected to the upper pressure plate, the lower pressure plate is fixedly connected to the base, the lower pressure plate and the upper pressure plate are both provided with two pressure grooves of unequal widths, and the lower pressure plate is provided with a first terminal.

[0008] Preferably, the left potential end and the right potential end both include an upper contact piece and a lower contact piece, the lower contact piece is fixedly connected to the frame, the upper contact piece is arranged on the lifting mechanism, the upper contact piece and the lower contact piece are both provided with a card slot corresponding to the pressing slot, and the upper contact piece and the lower contact piece are both provided with a second terminal.

[0009] Preferably, the lifting mechanism includes a servo motor, a fixed plate, a ball screw, a ball nut and a pressure rod. The servo motor is fixedly connected to the fixed plate. The servo motor is provided with a coupling connected to the ball screw. The ball nut is sleeved on the ball screw. The ball nut is provided with a connecting plate connected to the pressure rod. The upper contact piece is arranged at both ends of the pressure rod.

[0010] Preferably, the fixing plate is provided with a guide shaft connected to the frame, the guide shaft is provided with a guide sleeve, the guide sleeve is provided with a connecting block connected to the pressure rod, and the connecting block and the guide sleeve are an integrated structure.

[0011] Preferably, the frame is provided with a fixing block, the fixing block is provided with an insulating plate, the insulating plate is provided with a fixing groove for fixing the lower contact piece, and a limiting groove corresponding to the card slot.

[0012] Preferably, the pressure rod is provided with an outwardly extending extension plate, and the extension plate is provided with a fixing frame for fixing the temperature sensor.

[0013] Preferably, the frame is provided with an illumination lamp, and the bottom end of the frame is provided with a movable wheel.

[0014] In summary, the present invention has the following advantages: the conductor under test is fixed to the frame via the left and right current terminals. Since the right current terminal is movably connected to the frame, before testing, a certain tension can be applied to the conductor under test by the movement of the right current terminal on the frame, so that the conductor under test is in a straight state. Then, the voltage of the conductor under test is collected by a potential collection mechanism between the lifting mechanism and the frame. The potential collection mechanism is configured as a left potential terminal and a right potential terminal. Since the potential difference between different parts of the conductor is a voltage, the voltage on the conductor under test can be quickly and accurately calculated by collecting the potential at the left and right points of the conductor under test. Since the current introduced into the conductor under test through the left and right current terminals is a constant value, the DC resistance of the conductor under test can be quickly calculated based on the voltage and current. Secondly, since a temperature sensor is provided on the lifting mechanism, the temperature sensor can be raised and lowered synchronously with the lifting mechanism, and the temperature of the conductor under test can be simultaneously collected during the potential collection. Moreover, the temperature information and the DC resistance information can be displayed in real time on the touch screen, thereby reducing the workload and the probability of human error, and effectively improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings:

[0016] Figure 1 This is a schematic structural diagram of a device for testing the DC resistance of a conductor according to the present invention;

[0017] Figure 2 Schematic diagram of the structure of the left current end in the present invention;

[0018] Figure 3 This is a schematic structural diagram of the connection between the first push rod and the right current terminal in the present invention;

[0019] Figure 4 This is a schematic diagram of the structure in which the right current terminal is on the bottom plate in the present invention;

[0020] Figure 5 A perspective view of the lifting mechanism of the present invention;

[0021] Figure 6 Schematic diagram of the structure of the lifting mechanism of the present invention;

[0022] Figure 7 This is a schematic structural diagram of the lower contact piece on the fixed block in the present invention.

[0023] Reference numerals:

[0024] 1 frame, 10 base plate, 11 horizontal linear guide, 12 horizontal slider, 13 first push rod, 14 slide plate, 15 slide groove, 16 reinforcement rib, 17 fixed block, 170 insulation plate, 171 fixed groove, 172 limit groove, 18 lighting lamp, 19 moving wheel, 2 left current terminal, 3 right current terminal, 4 lifting mechanism, 41 servo motor, 42 fixed plate, 421 guide shaft, 422 guide sleeve, 423 connecting block, 43 ball screw, 44 ball nut, 45 pressure rod, 451 extension plate, 452 fixed frame, 46 coupling, 47 connecting plate, 5 potential collection mechanism, 51 left potential terminal, 52 right potential terminal, 53 upper contact piece, 54 lower contact piece, 55 slot, 56 second terminal, 6 temperature sensor, 7 resistance tester, 8 touch screen, 9 base, 91 lower pressure plate, 92 upper pressure plate, 93 second push rod, 94 pressure groove, 95 first terminal. DETAILED DESCRIPTION

[0025] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, a device for testing the DC resistance of a conductor includes a frame 1, a left current terminal 2, a right current terminal 3, and a lifting mechanism 4. The left current terminal 2 is fixedly connected to one end of the frame 1, and the right current terminal 3 is movably connected to the other end of the frame 1. The lifting mechanism 4 is fixedly connected to the frame 1 and is located between the left current terminal 2 and the right current terminal 3. One end of the conductor to be tested is fixedly connected to the left current terminal 2, and the other end of the conductor to be tested is fixedly connected to the right current terminal 3. If the conductor to be tested is an insulated wire, the insulation layer and other coverings on the conductor to be tested need to be stripped off, and the conductor to be tested is tested by the right current terminal 3. The movement of the terminal 3 on the frame 1 applies a pulling force to the measured conductor. A potential collection mechanism 5 for collecting the voltage of the measured conductor is provided between the lifting mechanism 4 and the frame 1. The potential collection mechanism 5 includes a left potential terminal 51 and a right potential terminal 52, which are respectively in contact with the measured conductor. The lifting mechanism is provided with a temperature sensor 6 for collecting the temperature of the measured conductor. The frame 1 is provided with a resistance tester 7 and a touch screen 8. The left potential terminal, the right potential terminal, the left current terminal, and the right current terminal are all connected to the resistance tester. The resistance tester is communicatively connected to the touch screen, and the temperature sensor is electrically connected to the touch screen.

[0026] The conductor under test is fixed to the frame via the left and right current terminals. Since the right current terminal is movably connected to the frame, before testing, the movement of the right current terminal on the frame can apply a certain tension to the conductor under test, keeping the conductor under test in a straight state. The voltage of the conductor under test is then collected via a potential acquisition mechanism between the lifting mechanism and the frame. The potential acquisition mechanism is configured as a left potential terminal and a right potential terminal. Since the potential difference between different parts of the conductor is a voltage, by collecting the potential at the left and right points of the conductor under test, the voltage on the conductor under test can be quickly and accurately calculated. Since the current introduced into the conductor under test through the left and right current terminals is a constant value, the DC resistance of the conductor can be quickly calculated based on the voltage and current. Secondly, since a temperature sensor is provided on the lifting mechanism, the temperature sensor can be raised and lowered synchronously with the lifting mechanism, and the temperature of the conductor under test can be simultaneously collected during potential acquisition. The temperature information and DC resistance information can be displayed in real time on the touch screen, thereby reducing workload and the probability of human error, effectively improving test efficiency.

[0027] The frame 1 is provided with a base plate 10, the base plate 10 is provided with a horizontal linear guide rail 11, the horizontal linear guide rail 11 is provided with a horizontal slider 12, the right current end 3 is fixedly connected to the horizontal slider 12, and the frame 1 is provided with a first push rod 13 for driving the horizontal slider 12 to reciprocate on the horizontal linear guide rail 11. Since the horizontal slider 12 can reciprocate on the horizontal linear guide rail 11 under the driving force of the first push rod 13, the right current end 3 can move synchronously with the horizontal slider 12, and the horizontal linear guide rail 11 and the horizontal slider 12 can ensure the straightness of the horizontal slider 12 during movement. The first push rod 13 is arranged on the frame 1 below the base plate 10. The first push rod 13 is provided with a slide plate 14 connected to the horizontal slider 12. The base plate 10 is provided with a slide groove 15 that cooperates with the slide plate 14, and the slide plate 14 is provided with a reinforcing rib 16 connected to the horizontal slider 12. Arranging the first push rod 13 on the frame 1 below the base plate 10 can prevent the measured wire from being spatially interfered with by the first push rod 13 during the installation process, thereby improving the installation quality of the measured wire. Secondly, the setting of the slide plate 14 can, on the one hand, realize the quick connection between the first push rod 13 and the horizontal slider 12. On the other hand, due to the setting of the slide plate 14 and the slide groove 15, the stability of the horizontal slider 12 during movement can be ensured.

[0028] The left current terminal 2 and the right current terminal 3 each include a base 9, a lower pressing plate 91 and an upper pressing plate 92. The base 9 is provided with a second push rod 93 connected to the upper pressing plate 92. The lower pressing plate 91 is fixedly connected to the base 9. The lower pressing plate 91 and the upper pressing plate 92 are each provided with two pressing grooves 94 of unequal widths. The lower pressing plate 91 is provided with a first terminal 95. The left current terminal 2 and the right current terminal 3 are arranged into a structure of a base 9, a lower pressing plate 91 and an upper pressing plate 92. Since the lower pressing plate 91 is fixedly connected to the base 9, it is convenient to place the measured wire. Then, the upper pressing plate 9 is driven by the second push rod 93. 2 moves downward, so that the measured wire is clamped between the lower pressing plate 91 and the upper pressing plate 92, thereby improving the fixing quality of the measured wire. When the right current terminal 3 moves, the relative movement of the measured wire and the left current terminal 2 and the right current terminal 3 can be reduced, thereby improving the straightening quality of the measured wire. Secondly, in this embodiment, two pressing grooves 94 of unequal widths are provided on the lower pressing plate 91 and the upper pressing plate 92, so that they can adapt to wires of different sizes. Specifically, in this embodiment, one pressing groove 94 is suitable for wires with a conductor diameter of less than φ12 mm, and the other pressing groove 94 is suitable for wires with a conductor diameter of φ12 mm to φ58 mm.

[0029] The left potential end 51 and the right potential end 52 both include an upper contact piece 53 and a lower contact piece 54. The lower contact piece 54 is fixedly connected to the frame 1. The upper contact piece 53 is arranged on the lifting mechanism 4. The upper contact piece 53 and the lower contact piece 54 are both provided with a card slot 55 corresponding to the pressing slot 94. The upper contact piece 53 and the lower contact piece 54 are both provided with a second terminal 56. The left potential end 51 and the right potential end 52 are both configured as the upper contact piece 53 and the lower contact piece 54. Due to the provision of the card slot 55, the contact quality of the upper contact piece 53 and the lower contact piece 54 with the measured wire can be improved, thereby improving the quality of potential collection. The provision of the second terminal 56 can simplify the installation of the test line and also improve the connection quality of the test line.

[0030] The lifting mechanism 4 includes a servo motor 41, a fixed plate 42, a ball screw 43, a ball nut 44 and a pressure rod 45. The servo motor 41 is fixedly connected to the fixed plate 42. The servo motor 41 is provided with a coupling 46 connected to the ball screw 43. The ball nut 44 is sleeved on the ball screw 43. The ball nut 44 is provided with a connecting plate 47 connected to the pressure rod 45. The upper contact piece 53 is provided at both ends of the pressure rod 45. The lifting mechanism 4 is configured as a structure of a servo motor 41, a fixed plate 42, a ball screw 43, a ball nut 44 and a pressure rod 45. The rotation of the ball screw 43 is driven by the rotation of the servo motor 41. Since the ball nut 44 is provided on the ball screw 43, when the ball screw 43 rotates, the ball nut 44 can move along the ball screw 43.

[0031] The ball screw 43 makes linear motion. Since the ball nut 44 is provided with a connecting plate 47 connected to the pressure rod 45, the ball nut 44 can drive the pressure rod 45 to move synchronously during linear motion. The transmission efficiency of the entire lifting mechanism 4 is high, which can ensure the stability of the pressure rod 45 during lifting and lowering. Specifically, during use, when the servo motor 41 rotates forward to drive the ball screw 43 to rotate forward, the ball nut 44 moves downward on the ball screw 43, thereby realizing the descent of the pressure rod 45. When the servo motor 41 reverses and drives the ball screw 43 to reverse, the ball nut 44 moves upward on the ball screw 43, thereby realizing the ascent of the pressure rod 45.

[0032] The fixing plate 42 is provided with a guide shaft 421 connected to the frame 1, and the guide shaft 421 is provided with a guide sleeve 422. The guide sleeve 422 is provided with a connecting block 423 connected to the pressure rod 45, and the connecting block 423 and the guide sleeve 422 are an integrated structure. The movement of the guide sleeve 422 on the guide shaft 421 drives the movement of the pressure rod 45, which can ensure the straightness of the pressure rod 45 when moving, and ensure the contact quality of the upper contact piece 53 and the measured wire. Secondly, the setting of the connecting block 423 can increase the contact area between the guide sleeve 422 and the pressure rod 45, improve the fixing quality of the pressure rod 45, and the connecting block 423 and the guide sleeve 422 are an integrated structure, which can simplify the installation process between the connecting block 423 and the guide sleeve 422, and greatly improve the connection strength between the connecting block 423 and the guide sleeve 422.

[0033] The frame 1 is provided with a fixing block 17, and an insulating plate 170 is provided on the fixing block 17. The insulating plate 170 is provided with a fixing groove 171 for fixing the lower contact piece 54, and a limiting groove 172 corresponding to the clamping groove 55. This enables the lower contact piece 54 to be quickly installed on the frame 1. In addition, by providing the limiting groove 172 on the insulating plate 170 to limit the position of the measured wire, the fixing quality of the measured wire on the lower contact piece 54 can be improved. The pressure rod 45 is provided with an outwardly extending extension plate 451. The extension plate 451 is provided with a fixing frame 452 for securing the temperature sensor 6. This allows the temperature sensor 6 to be installed without interfering spatially with the upper contact plate 53, thereby improving the securing quality of the temperature sensor 6. In this embodiment, the fixing frame 452 is provided with a power supply connected to the temperature sensor 6, ensuring continuous operation of the temperature sensor 6. Furthermore, the extension plate 451 in this embodiment can be integrated with the pressure rod 45 to enhance the securing strength of the extension plate 451, simplify the installation process between the extension plate 451 and the pressure rod 45, and enhance the connection strength between the extension plate 451 and the pressure rod 45. The frame 1 is provided with a lighting lamp 18, and the bottom end of the frame 1 is provided with movable wheels 19. The provision of the lighting lamp 18 enables operation at night or in low-light environments, and the provision of the movable wheels 19 facilitates movement of the entire device.

[0034] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in this field within the scope of the present invention are included in the patent scope of the present invention.

Claims

1. A device for testing the DC resistance of a conductor, characterized by: The utility model comprises a frame, a left current terminal, a right current terminal and a lifting mechanism, wherein the left current terminal is fixedly connected to one end of the frame, the right current terminal is movably connected to the other end of the frame, the lifting mechanism is fixedly connected to the frame and is located between the left current terminal and the right current terminal, one end of the measured wire is fixedly connected to the left current terminal, the other end of the measured wire is fixedly connected to the right current terminal, and a pulling force is applied to the measured wire by the movement of the right current terminal on the frame, a potential collecting mechanism for collecting the voltage of the measured wire is provided between the lifting mechanism and the frame, the potential collecting mechanism comprises a left potential terminal and a right potential terminal respectively contacting the measured wire, a temperature sensor for collecting the temperature of the measured wire is provided on the lifting mechanism, a resistance tester and a touch screen are provided on the frame, the left potential terminal, the right potential terminal and the left current terminal are connected to the left current terminal, and the right current terminal are connected to the left current terminal. The right current end is connected to the resistance tester, the resistance tester is communicatively connected to the touch screen, the temperature sensor is electrically connected to the touch screen, the left potential end and the right potential end each include an upper contact piece and a lower contact piece, the lower contact piece is fixedly connected to the frame, the upper contact piece is arranged on the lifting mechanism, the upper contact piece and the lower contact piece are both provided with a card slot corresponding to the pressure slot, the upper contact piece and the lower contact piece are both provided with a second terminal, the lifting mechanism includes a servo motor, a fixed plate, a ball screw, a ball nut and a pressure rod, the servo motor is fixedly connected to the fixed plate, the servo motor is provided with a coupling connected to the ball screw, the ball nut is sleeved on the ball screw, the ball nut is provided with a connecting plate connected to the pressure rod, and the upper contact piece is arranged at both ends of the pressure rod.

2. The device for facilitating DC resistance testing of a conductor according to claim 1, characterized in that: The frame is provided with a base plate, the base plate is provided with a horizontal linear guide rail, the horizontal linear guide rail is provided with a horizontal slider, the right current end is fixedly connected to the horizontal slider, and the frame is provided with a first push rod for driving the horizontal slider to reciprocate on the horizontal linear guide rail.

3. The device for facilitating DC resistance testing of a conductor according to claim 2, characterized in that: The first push rod is arranged on the frame below the bottom plate, the first push rod is provided with a slide plate connected to the horizontal slider, the bottom plate is provided with a slide groove matching the slide plate, and the slide plate is provided with a reinforcing rib connected to the horizontal slider.

4. The device for facilitating DC resistance testing of a conductor according to claim 3, characterized in that: The left current end and the right current end both include a base, a lower pressing plate and an upper pressing plate. The base is provided with a second push rod connected to the upper pressing plate. The lower pressing plate is fixedly connected to the base. The lower pressing plate and the upper pressing plate are both provided with two pressing grooves of unequal widths. The lower pressing plate is provided with a first terminal.

5. The device for facilitating DC resistance testing of a conductor according to claim 1, characterized in that: The fixing plate is provided with a guide shaft connected to the frame, the guide shaft is provided with a guide sleeve, the guide sleeve is provided with a connecting block connected to the pressure rod, and the connecting block and the guide sleeve are an integrated structure.

6. The device for facilitating DC resistance testing of a conductor according to claim 5, characterized in that: The frame is provided with a fixing block, the fixing block is provided with an insulating plate, the insulating plate is provided with a fixing groove for fixing the lower contact piece, and a limiting groove corresponding to the clamping groove.

7. The device for facilitating DC resistance testing of a conductor according to claim 6, characterized in that: An extension plate extending outward is provided on the pressure rod, and a fixing frame for fixing the temperature sensor is provided on the extension plate.

8. The device for facilitating DC resistance testing of a conductor according to claim 1, characterized in that: The frame is provided with an illuminating lamp, and the bottom end of the frame is provided with a moving wheel.

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