A cable insulation performance testing device

Abstract

The utility model relates to the technical field of cable detection, and specifically is a cable insulation performance detection device. The utility model comprises a base, a mounting mechanism is arranged on the top surface of the base, the mounting mechanism comprises two fixed seats, a fixing mechanism is arranged on the side of the fixed seat, a transmission component is arranged between the two fixed seats, one end of the base is fixedly connected with a driving component, and the driving component is fixedly connected with one end of the transmission component; a vertical plate is fixedly installed on the top surface of the base, a mounting seat is fixedly installed on the top of the vertical plate, and a megohmmeter is detachably fixedly installed in the mounting seat; both sides of the vertical plate are fixedly connected with a limiting mechanism; the limiting mechanism is arranged so that the contact area between two test lines and the insulation layer of the cable is kept the same, and under the elastic force of the spring, the conductive block is stably squeezed and contacted with the insulation layer of the cable, thereby ensuring the consistency of the contact area between the two test lines and the insulation layer of the cable.

Description

Technical Field

[0001] The utility model relates to the technical field of cable detection, in particular to a cable insulation performance detection device. Background Art

[0002] Cable is an electrical energy or signal transmission device, usually composed of several or several groups of wires, covered with insulating sheath. Insulation testing is very important during the production process of cables to ensure the safety and reliability of cables during use.

[0003] In the prior art, the insulation performance of the cable is generally tested by a megohmmeter. Specifically, a cable sample of a fixed length is first taken, and then the positive and negative test lines of the megohmmeter are respectively connected to the two ends of the insulation layer of the cable to be tested to ensure that the connection is firm and not loose. Generally, the test line and the cable insulation layer are fixedly connected through a conductive frame; then, according to the specifications and requirements of the cable to be tested, the test parameters of the megohmmeter, such as the test voltage, test range, etc., are set. The megohmmeter will apply a voltage to the cable insulation layer, and then measure the current to calculate the resistance value of the cable insulation layer. The larger the resistance value, the better the insulation performance; conversely, the smaller the resistance value, the poorer the insulation performance.

[0004] However, there are still the following deficiencies in the process of using megohmmeter for testing:

[0005] When using the conductive clip to contact the cable insulation layer, the contact area between the conductive clips of the positive and negative test lines and the cable insulation layer is likely to be different, which may cause the current to flow unevenly, resulting in excessive or insufficient local current density, and uneven contact area may also lead to uneven contact resistance, resulting in measurement errors. Smaller contact area may increase contact resistance, affect the flow of current, and thus affect the measurement results. Utility Model Content

[0006] The purpose of the utility model is to provide a cable insulation performance detection device to solve the problems raised in the above background technology.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] A cable insulation performance detection device comprises a base, the top surface of the base is fixedly provided with an installation mechanism for installing a cable, the installation mechanism comprises two fixing seats 1 respectively fixedly installed at two ends of the top surface of the base, a fixing mechanism is rotatably installed through the upper part of the side surface of the fixing seat 1, a transmission assembly is provided between the two fixing seats 1 and is transmission-connected with two groups of the fixing mechanisms at the same time, one end of the base is fixedly connected with a driving assembly, and the driving assembly is fixedly connected with one end of the transmission assembly;

[0009] A vertical plate is fixedly installed at the middle position of one side of the top surface of the base, a mounting seat is fixedly installed at the top of the vertical plate, and a megohmmeter is detachably fixedly installed in the mounting seat;

[0010] The two sides of the vertical plate are fixedly connected to the limiting mechanism. The two sets of limiting column mechanisms are used to limit the distance between the two test lines of the megohmmeter and the contact position of the cable, and to electrically connect the end of the test line away from the megohmmeter to the insulation layer of the cable.

[0011] Furthermore, the fixing mechanism includes a rotating shaft rotatably installed on a fixing seat, a second gear is fixedly installed on the end of the rotating shaft away from the vertical plate, a fixing component is fixedly installed on the end of the rotating shaft close to the vertical plate, and a cable is detachably fixedly connected between the two fixing components.

[0012] Further, the fixing assembly includes a mounting plate fixedly connected to the rotating shaft, and the mounting plate is fixedly mounted with fixing seats at both ends of the side away from the rotating shaft, a bidirectional screw is rotatably mounted between the two fixing seats, and two sliding rods symmetrically distributed about the bidirectional screw are fixedly connected between the two fixing seats, the axis of the bidirectional screw and the axis of the rotating shaft are in the same plane and in a vertical relationship, and the middle point of the bidirectional screw is located on the axis of the rotating shaft;

[0013] The outer thread of the bidirectional screw is equipped with two sliders symmetrically arranged about the middle position of the bidirectional screw, and the slider is slidably connected with the two slide bars through, one end of the slider away from the mounting plate is fixedly connected with a connecting rod, and one end of the connecting rod away from the slider is fixedly equipped with an arc-shaped clamping block, and the inner arc surfaces of the arc-shaped clamping blocks on the two connecting rods are arranged opposite to each other;

[0014] One end of the bidirectional screw rod rotates and passes through a fixed seat at a corresponding position, and a knob is fixedly installed thereon.

[0015] Furthermore, the transmission assembly includes a transmission shaft rotatably installed between the two fixed seats, both ends of the transmission shaft rotate through the fixed seats at corresponding positions, and first gears are fixedly installed at both end positions of the outer periphery of the transmission shaft, and the two first gears are respectively meshed with the two second gears.

[0016] Furthermore, the driving assembly includes a convex plate fixedly connected to one end of the base, a motor is fixedly mounted on the top surface of the convex plate, and an output shaft end of the motor is fixedly connected to an end of the transmission shaft close to the motor.

[0017] Further, the limiting mechanism includes a connecting plate, one end of the connecting plate is fixedly connected to the middle position of the side of the vertical plate, the other end of the connecting plate is fixedly connected to a limiting block, the top surface of the limiting block is provided with a through hole 1, the bottom surface of the limiting block is fixedly connected with a limiting column coaxial with the through hole, the limiting column is a hollow structure, and the top end of the limiting column is provided with a through hole 2 coaxial with the through hole;

[0018] A telescopic column with a hollow structure is slidably inserted into the bottom end of the limit column, and a flange is arranged at one end of the periphery of the telescopic column located inside the limit column, and the outer side of the flange is slidably connected to the inner wall of the limit column; a conductive block is fixedly connected to the bottom end of the telescopic column, and the conductive block is an arc-shaped structure;

[0019] The end of the test line away from the megohmmeter passes through the first through hole, the second through hole, the limit column and the telescopic column in sequence and is fixedly electrically connected to the conductive block;

[0020] A spring sleeved on the periphery of the test line is fixedly connected between the flange and the inner top surface of the connecting rod.

[0021] Beneficial effects of the utility model:

[0022] 1. In the present invention, the two sets of fixing mechanisms can be used to quickly complete the disassembly and assembly of the cable end, thereby improving the convenience of the device. In addition, with the setting of the limiting mechanism, the electrical connection between the test line and the cable insulation layer can be completed simultaneously when the cable installation operation is completed, thereby further improving the convenience of operation of the present invention.

[0023] 2. The setting of the conductive block in the limit mechanism of the utility model makes the contact area between the two test lines and the cable insulation layer remain the same, and under the elastic force of the spring, the conductive block and the cable insulation layer are in stable extrusion contact, thereby ensuring the consistency of the contact area between the two test lines and the cable insulation layer, which is conducive to improving the accuracy of the test results;

[0024] 3. The utility model can detect the uniformity of the thickness of the cable insulation layer by coordinating the drive assembly and the transmission assembly with the second gear and the rotating shaft in the fixing mechanism, thereby improving the detection functionality of the utility model and the accuracy of the insulation performance detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0027] Figure 2 yes Figure 1 A magnified view of part B;

[0028] Figure 3 It is a structural schematic diagram of the connection relationship between the conductive block and the cable in the utility model;

[0029] Figure 4 yes Figure 1 A magnified view of part A;

[0030] The reference numerals are as follows:

[0031] 1-base, 2-fixed seat 1, 4-convex plate, 5-motor, 6-transmission shaft, 7-cable, 8-vertical plate, 9-connecting plate, 10-mounting seat, 11-megohmmeter, 12-second gear, 13-first gear, 14-rotating shaft, 15-fixing assembly, 16-conductive block, 17-telescopic column, 18-limiting column, 19-flange, 20-spring, 21-limiting block, 22-through hole 1, 23-test line, 24-through hole 2, 25-arc clamping block, 26-mounting plate, 27-fixed seat 2, 28-connecting rod, 29-knob, 30-bidirectional screw, 31-sliding rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Embodiment 1:

[0034] See also Figures 1 to 4 In an embodiment of the utility model, a cable insulation performance detection device includes a base 1, a mounting mechanism for mounting a cable 7 is fixedly arranged on the top surface of the base 1, the mounting mechanism includes two fixed seats 2 respectively fixedly arranged at two ends of the top surface of the base 1, a fixing mechanism is rotatably installed through the upper part of the side of the fixing seat 2, a transmission assembly that is simultaneously transmission-connected to the two sets of fixing mechanisms is arranged between the two fixing seats 2, one end of the base 1 is fixedly connected to the driving assembly, and the driving assembly is fixedly connected to one end of the transmission assembly;

[0035] A vertical plate 8 is fixedly installed at the middle position of one side of the top surface of the base 1, a mounting seat 10 is fixedly installed at the top of the vertical plate 8, and a megohmmeter 11 is detachably fixedly installed in the mounting seat 10;

[0036] Limiting mechanisms are fixedly connected to both sides of the vertical plate 8. The two sets of limiting column mechanisms are used to limit the distance between the contact positions of the two test lines 23 of the megohmmeter 11 and the cable 7, and to electrically connect the end of the test line 23 away from the megohmmeter 11 to the insulation layer of the cable 7.

[0037] Among them, the fixing mechanism includes a rotating shaft 14 which is rotatably installed on the fixing seat 2, a second gear 12 is fixedly installed on the end of the rotating shaft 14 away from the vertical plate 8, and a fixing component 15 is fixedly installed on the end of the rotating shaft 14 close to the vertical plate 8, and a cable 7 is detachably fixedly connected between the two fixing components 15.

[0038] The fixing assembly 15 includes a mounting plate 26 fixedly connected to the rotating shaft 14, and fixing seats 27 are fixedly installed at both ends of the side of the mounting plate 26 away from the rotating shaft 14. A bidirectional screw rod 30 is rotatably installed between the two fixing seats 27, and two sliding rods 31 symmetrically distributed about the bidirectional screw rod 30 are fixedly connected between the two fixing seats 27. The axis of the bidirectional screw rod 30 is in the same plane as the axis of the rotating shaft 14 and is in a vertical relationship. The middle point of the bidirectional screw rod 30 is located on the axis of the rotating shaft 14.

[0039] The outer thread of the bidirectional screw rod 30 is equipped with two sliders symmetrically arranged about the middle position of the bidirectional screw rod 30, and the sliders are slidably connected with the two slide rods 31 through, and the end of the slider away from the mounting plate 26 is fixedly connected with the connecting rod 28, and the end of the connecting rod 28 away from the slider is fixedly installed with the arc-shaped clamping block 25, and the inner arc surfaces of the arc-shaped clamping blocks 25 on the two connecting rods 28 are arranged oppositely;

[0040] One end of the bidirectional screw rod 30 rotates through the fixing seat 27 at the corresponding position and is fixedly mounted with a knob 29 .

[0041] The limiting mechanism includes a connecting plate 9, one end of which is fixedly connected to the middle position of the side of the vertical plate 8, and the other end of the connecting plate 9 is fixedly connected to a limiting block 21, a through hole 1 22 is provided on the top surface of the limiting block 21, and a limiting column 18 coaxial with the through hole 1 22 is fixedly connected to the bottom surface of the limiting block 21, the limiting column 18 is a hollow structure, and a through hole 24 coaxial with the through hole 1 22 is provided on the top of the limiting column 18;

[0042] A hollow telescopic column 17 is slidably inserted into the bottom end of the limiting column 18, and a flange 19 is provided at one end of the periphery of the telescopic column 17 located inside the limiting column 18, and the outer side of the flange 19 is slidably connected to the inner wall of the limiting column 18; a conductive block 16 is fixedly connected to the bottom end of the telescopic column 17, and the conductive block 16 is an arc-shaped structure;

[0043] The end of the test line 23 away from the megohmmeter 11 passes through the through hole 1 22, the through hole 24, the limit column 18 and the telescopic column 17 in sequence and is fixedly electrically connected to the conductive block 16;

[0044] A spring 20 sleeved on the periphery of the test line 23 is fixedly connected between the flange 19 and the inner top surface of the connecting rod 28 .

[0045] When the utility model is in use:

[0046] First, the cable 7 is fixedly installed between the two groups of fixing components 15. Specifically, one end of the cable 7 is placed between the two arc-shaped clamping blocks 25 in the corresponding fixing component 15, and then the bidirectional screw rod 30 is rotated by the knob 29, so that the two sliders slide synchronously close to each other, thereby driving the two arc-shaped clamping blocks 25 to clamp and fix the end of the cable 7; then the other end of the cable 7 is fixed by another group of fixing components 15, thereby completing the installation of the cable 7; after the installation is completed, the cable 7 and the rotating shaft 14 are in a coaxial position relationship.

[0047] During the installation of the cable 7, interference occurs between the cable 7 and the conductive block 16. Therefore, after fixing one end of the cable 7, it is necessary to fit the outer periphery of the cable 7 to the inner arc surfaces of the two conductive blocks 16, and then apply force to straighten the cable 7. Then, the other end of the cable 7 is fixedly connected through another set of fixing components 15. At this time, the spring 20 is in a compressed state, and the conductive block 16 and the outer periphery of the cable 7 are in squeeze-type sliding contact. Then, the two test lines 23 of the megohmmeter 11 are electrically connected to the insulating layer of the cable 7 through the two conductive blocks 16.

[0048] Then, the insulation performance of the insulation layer of the cable 7 is tested by using a megohmmeter 11. The larger the resistance value, the better the insulation performance; conversely, the smaller the resistance value, the poorer the insulation performance.

[0049] It should be noted that the telescopic column 17 , the flange 19 , the limit block 21 , the connecting plate 9 and the vertical plate 8 are all made of insulating materials to avoid a short circuit between the two test lines 23 and thus affect the accuracy of the test result.

[0050] In the utility model, the disassembly and assembly operations on the end of the cable 7 can be quickly completed through the setting of two sets of fixing mechanisms, which improves the convenience of use of the device. In addition, with the setting of the limiting mechanism, when the installation operation of the cable 7 is completed, the electrical connection operation between the test line 23 and the insulation layer of the cable 7 can be completed simultaneously, further improving the operational convenience of the utility model.

[0051] By setting the conductive block 16 in the limiting mechanism, the contact area between the two test lines 23 and the insulating layer of the cable 7 remains the same, and under the elastic force of the spring 20, the conductive block 16 and the insulating layer of the cable 7 are in stable extrusion contact, thereby ensuring the consistency of the contact area between the two test lines 23 and the insulating layer of the cable 7, which is beneficial to improving the accuracy of the detection results.

[0052] Embodiment 2:

[0053] See also Figure 1 and Figure 4 On the basis of Example 1, the transmission assembly includes a transmission shaft 6 rotatably installed between two fixed seats 2, both ends of the transmission shaft 6 rotate through the fixed seats 2 at corresponding positions, and first gears 13 are fixedly installed at both end positions of the outer periphery of the transmission shaft 6, and the two first gears 13 are respectively engaged with the two second gears 12.

[0054] The driving assembly includes a convex plate 4 fixedly connected to one end of the base 1 , a motor 5 is fixedly mounted on the top surface of the convex plate 4 , and an output shaft end of the motor 5 is fixedly connected to an end of the transmission shaft 6 close to the motor 5 .

[0055] After the resistance value displayed by the megohmmeter 11 is in a qualified state, the motor 5 is started and controlled to drive the transmission shaft 6 to rotate slowly and uniformly. The transmission shaft 6 synchronously drives the two rotating shafts 14 to rotate through the meshing of the first gear 13 and the second gear 12, thereby being able to drive the cable 7 to rotate circumferentially. Through this arrangement, the circumferential contact positions of the two conductive blocks 16 and the insulating layer of the cable 7 are changed synchronously. At this time, if the resistance value displayed by the megohmmeter 11 changes significantly, it indicates that there is an uneven thickness problem in the insulating layer of the cable 7. If the resistance value is lower than the qualified resistance value during the amplitude change process, it indicates that there are hidden dangers in the overall insulation performance. On the contrary, if the change amplitude is small and the resistance amplitude change values ​​are all within the qualified range, it indicates that the thickness is relatively uniform and the insulation performance is qualified.

[0056] Therefore, in the utility model, the uniformity of the thickness of the insulation layer of the cable 7 can be detected by coordinating the driving component and the transmission component with the second gear 12 and the rotating shaft 14 in the fixing mechanism, thereby improving the detection functionality of the utility model and the accuracy of the insulation performance detection.

[0057] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A cable insulation performance detection device, comprising a base (1), characterized in that: The top surface of the base (1) is fixedly provided with an installation mechanism for installing a cable (7), the installation mechanism comprising two fixing seats (2) respectively fixedly installed at two ends of the top surface of the base (1), a fixing mechanism is rotatably installed through the upper part of the side of the fixing seat (2), a transmission assembly is provided between the two fixing seats (2) and is transmission-connected to the two sets of the fixing mechanisms at the same time, one end of the base (1) is fixedly connected with a driving assembly, and the driving assembly is fixedly connected to one end of the transmission assembly; A vertical plate (8) is fixedly mounted at a middle position on one side of the top surface of the base (1), a mounting seat (10) is fixedly mounted on the top of the vertical plate (8), and a megohmmeter (11) is detachably fixedly mounted in the mounting seat (10); Both sides of the vertical plate (8) are fixedly connected to limit mechanisms, and the two sets of limit column mechanisms are used to limit the distance between the contact positions of the two test wires (23) of the megohmmeter (11) and the cable (7), and to electrically connect the end of the test wire (23) away from the megohmmeter (11) to the insulation layer of the cable (7).

2. A cable insulation performance detection device according to claim 1, characterized in that: The fixing mechanism comprises a rotating shaft (14) which is rotatably mounted on a fixing seat (2) in a through-type manner, a second gear (12) being fixedly mounted on one end of the rotating shaft (14) away from the vertical plate (8), and a fixing component (15) being fixedly mounted on one end of the rotating shaft (14) close to the vertical plate (8), and a cable (7) being detachably fixedly connected between the two fixing components (15).

3. A cable insulation performance detection device according to claim 2, characterized in that: The fixing assembly (15) comprises a mounting plate (26) fixedly connected to the rotating shaft (14), and fixing seats (27) are fixedly installed at both ends of the side of the mounting plate (26) away from the rotating shaft (14), and a bidirectional screw rod (30) is rotatably installed between the two fixing seats (27), and two sliding rods (31) symmetrically distributed about the bidirectional screw rod (30) are fixedly connected between the two fixing seats (27), the axis of the bidirectional screw rod (30) and the axis of the rotating shaft (14) are in the same plane and in a vertical relationship, and the middle point of the bidirectional screw rod (30) is located on the axis of the rotating shaft (14); The outer thread of the bidirectional screw rod (30) is provided with two slide blocks symmetrically arranged about the middle position of the bidirectional screw rod (30), and the slide blocks are slidably connected to the two slide rods (31) in a through-type manner, and the end of the slide block away from the mounting plate (26) is fixedly connected to a connecting rod (28), and the end of the connecting rod (28) away from the sliding block is fixedly provided with an arc-shaped clamping block (25), and the inner arc surfaces of the arc-shaped clamping blocks (25) on the two connecting rods (28) are arranged opposite to each other; One end of the bidirectional screw rod (30) rotates through a fixed seat (27) at a corresponding position and is fixedly mounted with a knob (29).

4. A cable insulation performance detection device according to claim 2, characterized in that: The transmission assembly comprises a transmission shaft (6) rotatably mounted between the two fixing seats (2), both ends of the transmission shaft (6) rotatably passing through the fixing seats (2) at corresponding positions, and first gears (13) are fixedly mounted at both ends of the outer periphery of the transmission shaft (6), and the two first gears (13) are respectively meshed with the two second gears (12).

5. A cable insulation performance detection device according to claim 4, characterized in that: The driving assembly comprises a convex plate (4) fixedly connected to one end of the base (1), a motor (5) being fixedly mounted on the top surface of the convex plate (4), and an output shaft end of the motor (5) being fixedly connected to an end of the transmission shaft (6) close to the motor (5).

6. A cable insulation performance detection device according to claim 1, characterized in that: The limiting mechanism comprises a connecting plate (9), one end of the connecting plate (9) is fixedly connected to the middle position of the side surface of the vertical plate (8), the other end of the connecting plate (9) is fixedly connected to a limiting block (21), the top surface of the limiting block (21) is provided with a through hole 1 (22), the bottom surface of the limiting block (21) is fixedly connected with a limiting column (18) coaxial with the through hole 1 (22), the limiting column (18) is a hollow structure, and the top end of the limiting column (18) is provided with a through hole 2 (24) coaxial with the through hole 1 (22); A telescopic column (17) with a hollow structure is slidably inserted into the bottom end of the limiting column (18); a flange (19) is provided at one end of the periphery of the telescopic column (17) located inside the limiting column (18); the outer side of the flange (19) is slidably connected to the inner wall of the limiting column (18); a conductive block (16) is fixedly connected to the bottom end of the telescopic column (17); the conductive block (16) is an arc-shaped structure; The end of the test line (23) away from the megohmmeter (11) passes through the first through hole (22), the second through hole (24), the limit column (18) and the telescopic column (17) in sequence and is fixedly electrically connected to the conductive block (16); A spring (20) sleeved around the periphery of the test line (23) is fixedly connected between the flange (19) and the inner top surface of the connecting rod (28).

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