A cable resistance detection device

Abstract

The utility model discloses a cable resistance detection device relates to cable detection related technical field, the utility model discloses a workbench, resistance meter, electricity connection subassembly and the sleeve, and one short side of workbench top is fixed with resistance meter, and the one end symmetry of resistance meter center to workbench is fixed with wire no.

Description

Technical Field

[0001] This utility model belongs to the technical field of cable testing, and in particular relates to a cable resistance testing device. Background Technology

[0002] The simplest method for testing the resistance of cables is the current method, also known as the micro-ohmmeter method. Its principle is based on the resistance value of the cable. A constant current source outputs different constant currents, and the voltage across the cable is precisely measured. The measured data is then used to calculate the DC resistance of the cable using Ohm's law. Therefore, before performing this detailed test, it is necessary to first roughly determine the approximate resistance of the cable using an ohmmeter to facilitate subsequent testing and determination of the specific resistance value. However, this method still has the following drawbacks in practical use:

[0003] When testing the resistance of a cable with a ohmmeter, the resistance is roughly determined by directly connecting both ends of the cable to the terminals of the ohmmeter. When testing the resistance of a shorter cable, the ohmmeter terminals can be held directly and brought into contact with both ends of the cable to measure the resistance. When testing the resistance of a longer cable, the ohmmeter terminals need to be brought into contact with both ends of the cable to measure the resistance. However, the ohmmeter terminals have limited length, which may result in not being able to reach both ends of a longer cable, making it inconvenient to use.

[0004] Secondly, when testing the resistance of a shorter cable, the resistance can be measured directly on a ohmmeter after the terminals are brought into contact with both ends of the shorter cable. However, the contact area between the terminals and the cable is limited, and the contact is not stable enough when the ohmmeter is held by hand, which will cause measurement errors. Utility Model Content

[0005] The purpose of this utility model is to provide a cable resistance testing device. By setting up a workbench, a resistance meter, a power connection component, and a rotating sleeve, it solves the problems that the applicability of the resistance meter to both long and short cable lengths is not good, and that unstable contact can easily cause measurement errors when testing short cables.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a cable resistance testing device, comprising a workbench, a resistance meter, a connection assembly, and a rotating sleeve. The resistance meter is fixed to one short side of the top of the workbench. A first wire is symmetrically fixed to one end of the resistance meter facing the center of the workbench. A fixing sleeve is fixed to the periphery of the first wire. Both fixing sleeves have notches on their periphery. A conductive sleeve is fitted around the periphery of the wire at the notch. A rotating sleeve is fixed to the periphery of the conductive sleeve. A metal sleeve is fixed to the periphery of the conductive sleeve. A sliding metal block is movably connected inside the metal sleeve. One end of the device is fixed with a wire three. The ends of the two wires one away from the ohmmeter are each fixed with a power connection component. The power connection component includes a wire two. The two wires two are respectively fixed to the two wires one. During operation, the ohmmeter is fixed and supported on the workbench. When the ohmmeter is working, it measures and displays the resistance of the cable being measured. When the power connection component is working, both ends of the longer external cable are connected to the ohmmeter to measure and display the resistance of the cable. By rotating the rotating sleeve, both ends of the shorter cable are connected to the ohmmeter, and the resistance of the cable is displayed by the ohmmeter.

[0008] Furthermore, connecting strips are fixed to the periphery of both of the fixing sleeves, and the bottom of the connecting strips is fixed to the top of the workbench. The fixing sleeves are supported on the top of the workbench by the connecting strips.

[0009] Furthermore, the power connection assembly also includes a flexible sleeve and a handle. The flexible sleeve is fixed to the periphery of the second wire. The flexible sleeve is fixed to the end of the fixed sleeve away from the resistance meter. The handle is fixed to the periphery of the flexible sleeve away from the fixed sleeve. The second wire is protected by the flexible sleeve, and the handle provides a gripping function for the flexible sleeve.

[0010] Furthermore, the metal sleeve passes through the rotating sleeve, and an insulating sleeve is fixed to the periphery of the metal sleeve on the outside of the rotating sleeve. One end of the insulating sleeve is fixed to the periphery of the rotating sleeve, and the metal sleeve is insulated and protected by the insulating sleeve.

[0011] Furthermore, a movable sleeve is fixed around the periphery of the third conductor. The movable sleeve passes through the end of the metal sleeve and the insulating sleeve away from the conductive sleeve, and the third conductor is connected to the metal sleeve and the conductive sleeve through the movable sleeve.

[0012] Furthermore, the power connection assembly also includes a metal head 1 and a connecting plate 1. The ends of the two wires 2 away from the wires 1 are each fixed with a metal head 1, and the tips of the two metal heads 1 are each fixed with a connecting plate 1. The ends of the two wires 3 away from the sliding metal block are each fixed with a metal head 2, and the tips of the metal heads 2 are each fixed with a connecting plate 2. This ensures that only two connecting plates 1 or only two connecting plates 2 are in contact with the cable, and then electrically connected to the ohmmeter, which displays the resistance of the cable.

[0013] Furthermore, a connecting sleeve is fixed to the end of the connecting disc one away from the metal head one and the end of the connecting disc two away from the metal head two. A threaded cylinder is fixedly connected to the upper periphery of the connecting sleeve. A threaded rod is threadedly connected inside the threaded cylinder. A handle is fixed to the top of the threaded rod. Rotating the handle drives the threaded rod to rotate. The threaded cylinder and the threaded rod are threadedly connected, so that the threaded rod can press the cable in the connecting sleeve.

[0014] This utility model has the following beneficial effects:

[0015] This invention solves the problem of insufficient applicability of resistance testing for both long and short cables by setting up a workbench, a resistance meter, a connection assembly, and a rotating sleeve. When testing the resistance of long cables, the conductors at both ends of the cable are fully exposed to connect to the connection structure. By holding the handles of the two connection assemblies, the cable ends are inserted into the two connecting sleeves. After the connecting discs on the metal head are fully in contact with the conductors at both ends of the cable, the operator presses the connecting discs against the conductors and clamps them with the connecting sleeves on the connecting discs to ensure connection stability. For shorter cables, the resistance can be tested by rotating the rotating sleeve, placing the cable on the top of the workbench between the two connecting discs, pushing it until the connecting discs contact the conductors, and then clamping it with the connecting sleeves on the connecting discs. This method is suitable for testing the resistance of shorter cables, making it more applicable to both long and short cable lengths when testing resistance with a resistance meter.

[0016] This invention solves the problem of unstable contact and measurement errors when testing shorter cables with a resistance meter by setting up a workbench, a resistance meter, and a rotating sleeve. The shorter cable is placed between two connecting discs, and then the movable sleeve is held, pushing the metal head and connecting discs. This causes the sliding metal block and conductor to change position within the metal sleeve until the two connecting discs are pushed to contact the two ends of the cable and press against the conductor portion. After the cable position is determined by the connecting sleeve, the resistance of the shorter cable can be measured. During operation, the contact is more stable when testing shorter cables, reducing measurement errors. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1A three-dimensional view of the assembly structure of a cable resistance detection device;

[0019] Figure 2 A three-dimensional structural diagram of the workbench;

[0020] Figure 3 This is a three-dimensional diagram of the structure of an ohmmeter;

[0021] Figure 4 This is a three-dimensional view of the electrical connection component after it has been cut open.

[0022] Figure 5 This is a three-dimensional view of the structure after the rotating sleeve has been cut open.

[0023] Figure 6 This is a three-dimensional structural view of the connecting sleeve.

[0024] Figure label:

[0025] 1. Workbench; 2. Resistance meter; 201. Fixed sleeve; 202. Connecting strip; 203. Wire one; 3. Electrical connection assembly; 301. Flexible sleeve; 302. Wire two; 303. Handle; 304. Metal head one; 305. Connecting disc one; 4. Rotating sleeve; 401. Conductive sleeve; 402. Metal sleeve; 403. Insulating sleeve; 404. Sliding metal block; 405. Wire three; 406. Movable sleeve; 407. Metal head two; 408. Connecting disc two; 5. Connecting sleeve; 501. Threaded cylinder; 502. Threaded rod; 503. Handle. Detailed Implementation

[0026] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5This utility model is a cable resistance testing device, including a workbench 1, a resistance meter 2, a connecting assembly 3, and a rotating sleeve 4. The resistance meter 2 is fixed to one short side of the top of the workbench 1, supporting it. The resistance meter 2 measures the corresponding cable resistance. Two wires 203 are symmetrically fixed to one end of the resistance meter 2 facing the center of the workbench 1. The resistance meter 2 is electrically connected to the two wires 203. The wires 203 also electrically connect the resistance meter 2 to wires 302 and 405. A fixing sleeve 201 is fixed to the periphery of the wires 203, insulating the surface of the wires 203. Both fixing sleeves 201 have notches on their peripheries, allowing conductive sleeves 401 to be fitted onto the periphery of the wires 203 during operation. The conductive sleeves 401 are fitted onto the periphery of the wires 203 at the notches in the fixing sleeves 201, allowing the conductive sleeves 401 to connect the conductors 203. Wire 203 and metal sleeve 402 are energized. A rotating sleeve 4 is fixed around the conductive sleeve 401, which insulates and covers the conductive sleeve 401. A metal sleeve 402 is fixed around the conductive sleeve 401, which fixes a sliding metal block 404 inside. The sliding metal block 404 is movably connected inside the metal sleeve 402, which stably energizes the metal sleeve 402 and wire 405. Wire 405 is fixed to one end of the sliding metal block 404, which energizes the sliding metal block 404 and its metal head 407. A energizing component 3 is fixed to the end of each of the two wires 203 away from the ohmmeter 2. After the wires 203 are in contact with the external cable end through the energizing component 3, the resistance of the cable can be measured through the ohmmeter 2. The energizing component 3 includes wire 302, and the two wires 302 are fixed to the two wires 203 respectively.

[0028] Among them, such as Figure 1-3 As shown, connecting strips 202 are fixed to the periphery of both fixed sleeves 201. The bottom of the connecting strips 202 is fixed to the top of the workbench 1, and the fixed sleeves 201 are fixedly supported on the top of the workbench 1 by the connecting strips 202.

[0029] Among them, such as Figure 1 , 4 As shown, the power connection assembly 3 also includes a flexible sleeve 301 and a handle 303. The flexible sleeve 301 is fixed around the second conductor 302. The flexible sleeve 301 is fixed to the end of the fixed sleeve 201 away from the resistance meter 2. The handle 303 is fixed to the end of the flexible sleeve 301 away from the fixed sleeve 201. When the power connection assembly 3 is working, the flexible sleeve 301 protects the second conductor 302, and the handle 303 provides a grip for the flexible sleeve 301.

[0030] Among them, such as Figure 1 , 5As shown, based on the first specific embodiment, the metal sleeve 402 passes through the rotating sleeve 4, and an insulating sleeve 403 is fixed on the periphery of the metal sleeve 402 on the outside of the rotating sleeve 4. One end of the insulating sleeve 403 is fixed on the periphery of the rotating sleeve 4. When the metal sleeve 402 is working, the insulating sleeve 403 covers the metal sleeve 402 for insulation protection.

[0031] Among them, such as Figure 1 , 5 As shown, a movable sleeve 406 is fixed around the periphery of the conductor 405. The movable sleeve 406 passes through the metal sleeve 402 and the insulating sleeve 403 at the end away from the conductive sleeve 401. When the conductor 405 is working, it is covered and protected by the movable sleeve 406.

[0032] Among them, such as Figure 1 , 4 As shown in Figure 5, the power connection assembly 3 also includes a metal head 304 and a connecting plate 305. The ends of the two conductors 302 away from the conductor 203 are each fixed with a metal head 304, and the tips of the two metal heads 304 are each fixed with a connecting plate 305. The ends of the two conductors 405 away from the sliding metal block 404 are each fixed with a metal head 407, and the tips of the metal heads 407 are each fixed with a connecting plate 408. After the two conductors 302 contact the conductors of the cable under test through the two connecting plates 305, a complete long cable measurement circuit is formed. The conductors 405 are fixed to the connecting plate 408 through the metal head 407, and contact the conductors at both ends of the cable through the connecting plate 408, forming a complete short cable measurement circuit.

[0033] Among them, such as Figure 1 , 4 As shown in Figures 5 and 6, a connecting sleeve 5 is fixed to the end of connecting disc 1 305 away from metal head 1 305 and the end of connecting disc 2 408 away from metal head 2 407. A threaded cylinder 501 is fixedly connected to the upper part of the periphery of the connecting sleeve 5. A threaded rod 502 is threadedly connected inside the threaded cylinder 501. A handle 503 is fixed to the top of the threaded rod 502. The connecting sleeve 5 is used to connect the end of the cable. The connecting sleeve 5 fixes the threaded cylinder 501 to it. The threaded cylinder 501 is used to thread the threaded rod 502. Rotating the handle 503 will drive the threaded rod 502 to rotate until it is pressed against the cable in the connecting sleeve 5, ensuring the electrical stability between the long cable and connecting disc 1 305 when measuring resistance or the short cable and connecting disc 2 408 when measuring resistance.

[0034] Working principle: When testing the resistance of a long cable, the conductors at both ends of the cable are fully exposed in order to connect to the energizing structure. By holding the handles 303 of the two energizing components 3, one end of the long cable is inserted into the connecting sleeve 5 on a connecting plate 305. After the connecting plate 305 on the metal head 304 is fully in contact with the ends of the conductors at both ends of the cable, the operator presses the connecting plate 305 tightly against the ends of the cable conductors. Then, the handle 503 above the connecting sleeve 5 is rotated, which drives the threaded rod 502 to rotate until it is pressed against the cable circumference of the connecting plate 305. The other end of the cable conductor is then inserted into the connecting sleeve 5 on the other connecting plate 305. The above operation process is repeated so that both ends of the long cable conductor are in close contact with the two connecting plates 305 respectively, ensuring the stability of the energization.

[0035] When measuring the resistance of a long cable, the operating current of ohmmeter 2 is transmitted through a conductor 203 to a conductor 302 fixed to conductor 203, and then through conductor 302 to a metal head 304. The current then passes through the cable conductor on a connecting plate 305 to another connecting plate 305, and through another connecting plate 305 to another metal head 304. Finally, the current is transmitted through another conductor 302 to conductor 203 fixed to conductor 302, until it returns to ohmmeter 2, forming a complete circuit. After the complete circuit is formed, the resistance of the cable under test can be roughly measured by ohmmeter 2.

[0036] After cutting the cable and sampling the shorter section, rotate the rotating sleeve 4 so that the connecting discs 408 of the two conductors connected by conductors 3 405 are facing each other (e.g., Figure 1 As shown), the shorter cable is then placed between the two connecting discs 408. The movable sleeve 406 is then held, and the metal head 407 and the connecting disc 408 are pushed. This causes the sliding metal block 404 and the conductor 405 to change position within the metal sleeve 402. The cable to be tested is then placed between the two connecting discs 408. The movable sleeve 406 is then pushed until both ends of the cable enter the connecting sleeves 5 on the connecting disc 408, and one end of the cable conductor contacts and is pressed against one of the connecting discs 408. The handle 503 is then rotated, causing the threaded rod 502 to rotate until it presses against the cable circumference of the connecting disc 408. The other end of the shorter cable is then placed in the same manner as the connecting sleeve 5 on the other connecting disc 408. This ensures that both ends of the shorter cable conductor are in close contact with the two connecting discs 408, guaranteeing the stability of the resistance measurement of the shorter cable.

[0037] When measuring the resistance of a short cable, the current is transferred from ohmmeter 2 to a conductor 203, then through conductive sleeve 401 to metal sleeve 402, through metal sleeve 402 to sliding metal block 404, through sliding metal block 404 to conductor 405, through conductor 405 to metal head 407, through connecting disc 408 on metal head 407 to the cable, then through the conductor inside the cable to another connecting disc 408, through another metal head 407 to another conductor 405, through another conductor 405 to another sliding metal block 404, through another sliding metal block 404 to another metal sleeve 402, through another metal sleeve 405 to another conductive sleeve 401, then through another conductive sleeve 401 to another conductor 203. After being transferred back to ohmmeter 2, the resistance of the cable is roughly measured by ohmmeter 2.

[0038] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A cable resistance testing device, comprising a workbench (1), a resistance meter (2), a power connection assembly (3), and a rotating sleeve (4), characterized in that: A resistance meter (2) is fixed to one short side of the top of the workbench (1). A wire (203) is symmetrically fixed to one end of the resistance meter (2) facing the center of the workbench (1). A fixing sleeve (201) is fixed to the periphery of the wire (203). Notches are opened on the periphery of both fixing sleeves (201). A conductive sleeve (401) is sleeved on the periphery of the wire (203) at the notch position of the fixing sleeve (201). A rotating sleeve (401) is fixed to the periphery of the conductive sleeve (401). 4) A metal sleeve (402) is fixed around the conductive sleeve (401). A sliding metal block (404) is movably connected inside the metal sleeve (402). A wire three (405) is fixed at one end of the sliding metal block (404). A power connection component (3) is fixed at the end of each of the two wires one (203) away from the resistance meter (2). The power connection component (3) includes a wire two (302). The two wires two (302) are respectively fixed to the two wires one (203).

2. The cable resistance detection device according to claim 1, characterized in that: Both of the fixed sleeves (201) are fixed with connecting strips (202) on their periphery, and the bottom of the connecting strips (202) is fixed to the top of the workbench (1).

3. The cable resistance detection device according to claim 1, characterized in that: The power connection assembly (3) also includes a flexible sleeve (301) and a handle (303). The flexible sleeve (301) is fixed around the second conductor (302). The flexible sleeve (301) is fixed to the end of the fixed sleeve (201) away from the resistance meter (2). The handle (303) is fixed to the end of the flexible sleeve (301) away from the fixed sleeve (201).

4. The cable resistance detection device according to claim 1, characterized in that: The metal sleeve (402) passes through the rotating sleeve (4), and an insulating sleeve (403) is fixed on the periphery of the metal sleeve (402) on the outside of the rotating sleeve (4), with one end of the insulating sleeve (403) fixed on the periphery of the rotating sleeve (4).

5. The cable resistance detection device according to claim 4, characterized in that: A movable sleeve (406) is fixed around the periphery of the conductor three (405). The movable sleeve (406) passes through the metal sleeve (402) and the insulating sleeve (403) at the end away from the conductive sleeve (401).

6. The cable resistance detection device according to claim 1, characterized in that: The power connection assembly (3) also includes a metal head (304) and a connecting plate (305). The ends of the two wires (302) away from the wires (203) are fixed with metal heads (304), and the tips of the two metal heads (304) are fixed with connecting plates (305). The ends of the two wires (405) away from the sliding metal block (404) are fixed with metal heads (407), and the tips of the metal heads (407) are fixed with connecting plates (408).

7. A cable resistance detection device according to claim 6, characterized in that: The end of the connecting disc one (305) away from the metal head one (304) and the end of the connecting disc two (408) away from the metal head two (407) are both fixed with connecting sleeves (5). The upper part of the periphery of the connecting sleeves (5) is fixedly connected with threaded cylinders (501). A threaded rod (502) is threadedly connected inside the threaded cylinder (501). A handle (503) is fixedly fixed at the top of the threaded rod (502).

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