阅读说明：本技术 一种电缆的电气性能测试工装 (Electrical performance test tool for cable ) 是由 戴冕 李亮 戴章 戴文秉 戴文忠 于 2020-04-20 设计创作，主要内容包括：本发明公开了一种电缆的电气性能测试工装,包括测量仪、测试台、两个电流夹具以及两个电压夹具,两个电流夹具滑动设置在测试台上用于夹持待测电缆的两端,测试台的上端卡接有电压测量滑盖,电压测量滑盖上滑动设置有滑动安装板,两个电压夹具间距可调的设置在滑动安装板的下表面,两个电压夹具通过第一动力组件实现同步开合,滑动安装板通过第二动力组件驱动沿着电压测量滑盖水平移动,本发明的电压夹具间距调节好后同步移动,避免了电压夹具独自移动过程中电压夹具之间距离定量的变化,减小对测量结果的影响；机械方式代替人工实现电压夹具对待测电缆的多次夹持提高了测量的效率,也减少由于手动调节产生的夹持力度不均造成的测试误差。(The invention discloses an electrical performance testing tool for a cable, which comprises a measuring instrument, a test board, two current clamps and two voltage clamps, wherein the two current clamps are arranged on the test board in a sliding manner and used for clamping two ends of the cable to be tested; the mechanical mode replaces the manual work to realize that voltage anchor clamps have improved measuring efficiency to the multiple centre gripping of the cable that awaits measuring, also reduces the testing error that the clamping dynamics that produces owing to manual regulation is uneven causes.)

1. The utility model provides an electric capability test frock of cable, includes measuring apparatu (1), testboard (2), two current clamp (3) and two voltage anchor clamps (4), two current clamp (3) slide to set up be used for the centre gripping cable's that awaits measuring both ends on testboard (2), its characterized in that: the upper end joint of testboard (2) has voltage measurement sliding closure (5), it is provided with sliding mounting board (6), two to slide on voltage measurement sliding closure (5) voltage anchor clamps (4) interval adjustable set up the lower surface of sliding mounting board (6), two voltage anchor clamps (4) realize opening and shutting in step through first power component (7), sliding mounting board (6) are driven along voltage measurement sliding closure (5) horizontal migration through second power component (8).

2. The electrical performance test fixture of cable of claim 1, characterized in that: slide guide rail (601) are installed to the one end of the lower surface of slide mounting board (6), one of them voltage anchor clamps (4) slidable mounting be in on slide guide rail (601) to realize fixedly through retaining member and slide mounting board (6).

3. The electrical performance test fixture of cable of claim 1, characterized in that: voltage anchor clamps (4) include anchor clamps board (401), the direction of anchor clamps board (401) perpendicular to testboard (2) is provided with side direction limiting guide rail (402), along two-way lead screw (403) are installed to side direction limiting guide rail (402), the installation of lead screw seat (407) is passed through at the both ends of two-way lead screw (403), installs two lead screw nut slider (404) spacing between side direction limiting guide rail (402) on two-way lead screw (403) two install cable grip block (405) on lead screw nut slider (404) respectively, two-way lead screw (403) are rotatory through first motor (406) drive.

4. The electrical performance test fixture of cable of claim 3, characterized in that: first power component (7) are including the suit respectively two epaxial first belt pulley (701) of two-way lead screw (403) pivot and second belt pulley (702), still install third belt pulley (704) through mount pad (703) adjustable on sliding mounting board (6), connect through belt (705) between first belt pulley (701), second belt pulley (702) and third belt pulley (704), one of them is driven in first motor (406) two-way lead screw (403) are rotatory.

5. The electrical performance test fixture of cable of claim 4, characterized in that: the mounting seat (703) includes the grafting rail (706), slidable mounting is in lift mounting panel (707) on the grafting rail (706), one side of lift mounting panel (707) is equipped with vertical rack (708), vertical rack (708) with through handle (709) drive pivoted first gear (710) intermeshing, the upper end roll-mounting of lift mounting panel (707) has shaft (711), third belt pulley (704) suit is in on shaft (711).

6. The electrical performance test fixture of cable of claim 1, characterized in that: the second power assembly (8) comprises a moving latch (801) installed on the upper surface of the sliding installation plate (6), a second gear (802) is installed above the moving latch (801) in a meshed mode, and the second gear (802) is driven to rotate through a second motor (803).

7. The electrical performance test fixture of cable of claim 1, characterized in that: and a graduated scale (9) is arranged between the two voltage clamps (4) on the sliding mounting plate (6).

8. The electrical performance test fixture of cable of claim 1, characterized in that: be provided with spacing guide way (201) on testboard (2), the end of spacing guide way (201) is provided with joint post (202), lock nut (203) are installed through the screw thread in the upper end of joint post (202), the lower surface setting of voltage measurement sliding closure (5) can along the gliding joint piece (501) of spacing guide way (201), the front end of joint piece (501) be provided with joint post (202) constant head tank (502) of mutually supporting, the reason of going up of joint piece (501) is higher than the reason of going up of spacing guide way (201).

9. The electrical performance test fixture of cable of claim 8, characterized in that: the clamping columns (202) are prism-shaped.

Technical Field

The invention relates to the technical field of cable measuring devices, in particular to a cable electrical performance testing tool.

Background

Electrical properties generally include rated voltage, current, active power, reactive power, resistance, capacitance, inductance, conductance, and the like. The electrical performance test of the cable is one of the important parameters for measuring the performance of the cable. The testing of the direct current resistance of the conductive core of the wire and cable is of great importance in the manufacture of the wire and cable. The existing measuring method mainly comprises a bridge method and a digital method, the four-probe measuring technology is utilized, two current clamps are used for clamping two sides of a cable to be measured to straighten the cable, two voltage clamps are used for clamping the cable to be measured with a certain length in the middle, and measured data are processed by a measuring instrument.

However, the above measurement method has the following defects:

research shows that one of the main reasons causing the measurement error of the resistance of the conductor cable is the contact resistance, and the measurement result is influenced by the change of the contact area and the contact degree when the current clamp and the voltage clamp the cable to be measured, namely the measurement result is changed due to the change of the clamping position and the clamping force. In order to solve the above problems, the commonly adopted mode is a mode of measuring for multiple times and taking an average value, however, on one hand, the positions of two voltage clamps on the cable to be measured are adjusted for multiple times, so that it is difficult to ensure that the distance between the two voltage clamps is always constant, and the error level is increased; on the other hand, the manual adjustment of the voltage clamp for many times is not only troublesome, but also difficult to control the clamping force by manual operation.

Disclosure of Invention

Therefore, the invention provides a cable electrical performance testing tool to solve the defects in the prior art.

The utility model provides an electrical property test fixture of cable, includes measuring apparatu, testboard, two current clamp and two voltage clamp, two current clamp slides and sets up be used for the centre gripping cable's that awaits measuring both ends on the testboard, the upper end joint of testboard has the voltage measurement sliding closure, it is provided with sliding mounting board, two to slide on the voltage measurement sliding closure voltage clamp interval adjustable sets up sliding mounting board's lower surface, two voltage clamp realizes opening and shutting in step through first power component, sliding mounting board passes through the drive of second power component along voltage measurement sliding closure horizontal migration.

Preferably, a sliding guide rail is installed at one end of the lower surface of the sliding mounting plate, one of the voltage clamps is slidably installed on the sliding guide rail and fixed with the sliding mounting plate through a locking member.

Preferably, the voltage anchor clamps include the anchor clamps board, the direction of anchor clamps board perpendicular to testboard is provided with side direction limiting guide, along two-way lead screw is installed to side direction limiting guide, the lead screw seat installation is passed through at the both ends of two-way lead screw, installs two lead screw nut sliders spacing between side direction limiting guide on the two-way lead screw, two install the cable grip block on the lead screw nut slider respectively, two-way lead screw is rotatory through first motor drive.

Preferably, first power component is including the suit respectively two epaxial first belt pulley of two-way lead screw and second belt pulley, still install the third belt pulley through the adjustable installation of mount pad on the sliding mounting board, connect through the belt between first belt pulley, second belt pulley and the third belt pulley, one of them of first motor drive two-way lead screw is rotatory.

Preferably, the mounting seat comprises a sleeving rail and a lifting mounting plate slidably mounted on the sleeving rail, a vertical rack is arranged on one side of the lifting mounting plate, the vertical rack is meshed with a first gear driven to rotate by a handle, a wheel shaft is mounted at the upper end of the lifting mounting plate in a rolling manner, and the third belt pulley is sleeved on the wheel shaft.

Preferably, the second power assembly comprises a moving latch arranged on the upper surface of the sliding mounting plate, a second gear is arranged above the moving latch in a meshed mode, and the second gear is driven to rotate by a second motor.

Preferably, a graduated scale is arranged between the two voltage clamps on the sliding mounting plate.

Preferably, be provided with spacing guide way on the testboard, the end of spacing guide way is provided with the joint post, lock nut is installed through the screw thread in the upper end of joint post, the lower surface setting of voltage measurement sliding closure can along the gliding joint piece of spacing guide way, the front end of joint piece be provided with the constant head tank of joint post mutually supporting, the reason is higher than on the reason of spacing guide way on the joint piece.

Preferably, the clamping columns are prism-shaped.

The invention has the following advantages:

the invention can rapidly measure the resistance value of the cable to be measured for many times, and takes the average value of the resistance as the final measurement result, on one hand, after the distance between the voltage clamps is adjusted, the synchronous movement can be realized through the carrier sliding mounting plate, the quantitative change of the distance between the voltage clamps in the process of independent movement of the voltage clamps is avoided, and the influence on the measurement result is reduced; on the other hand, the multiple clamping of the voltage clamp to the cable to be tested is realized through a mechanical mode instead of manual work, so that the measuring efficiency is improved, and the test error caused by uneven clamping force generated by manual adjustment is reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic view of the bottom structure of the sliding mounting plate of the present invention;

FIG. 4 is a schematic view of the connection structure of the voltage clamp and the sliding mounting plate of the present invention;

FIG. 5 is an enlarged view of A in FIG. 3 according to the present invention;

FIG. 6 is an enlarged view of B in FIG. 4 according to the present invention;

fig. 7 is a schematic structural diagram of a voltage measuring slider according to the present invention.

In the figure:

1-a measuring instrument; 2-a test bench; 3-a current clamp; 4-voltage clamp; 5-voltage measurement sliding cover; 6-a sliding mounting plate; 7-a first power assembly; 8-a second power assembly; 9-a graduated scale;

201-limit guide groove; 202-a clamping column; 203-locking nut;

401-a clamp plate; 402-lateral curb rail; 403-bidirectional lead screw; 404-screw nut slide; 405-a cable clamping plate; 406-a first motor; 407-lead screw seat;

501-a clamping block; 502-positioning grooves; 601-a sliding guide rail;

701-a first pulley; 702-a second pulley; 703-a mounting base; 704-a third pulley; 705-belt; 706-a splicing rail; 707-lifting mounting plate; 708-a vertical rack; 709-a handle; 710-gear; 711-axle;

801-moving latch; 802-second gear; 803-second motor.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 7, the present invention provides a cable electrical performance testing tool, which can rapidly complete multiple measurements of electrical resistance performance of a cable, and improve accuracy of a test result. Specifically, the method comprises the following steps:

the test tool comprises a conventional measuring instrument 1, a test bench 2, two current clamps 3 and two voltage clamps 4, wherein the two current clamps 3 are arranged on the test bench 2 in a sliding mode and used for clamping two ends of a cable to be tested. The two current clamps 3 and the voltage clamp 4 are electrically connected with the measuring instrument 1, and finally the resistance value of the cable to be measured is calculated by the measuring instrument 1. The two voltage clamps 4 clamp the cable to be tested clamped by the two current clamps 3 from the inner sides of the two current clamps 3.

In order to facilitate the two voltage clamps 4 to realize the multiple adjustment of the clamping position of the cable to be tested. The upper end joint of testboard 2 has voltage measurement sliding closure 5, it is provided with sliding mounting board 6 to slide on voltage measurement sliding closure 5, two the setting of 4 interval adjustables of voltage anchor clamps is in sliding mounting board 6's lower surface. Specifically, the method comprises the following steps:

wherein, be provided with spacing guide way 201 on the testboard 2, the end of spacing guide way 201 is provided with joint post 202, lock nut 203 is installed through the screw thread in the upper end of joint post 202, the lower surface setting of voltage measurement sliding closure 5 can along the gliding joint piece 501 of spacing guide way 201, the front end of joint piece 501 be provided with the constant head tank 502 of joint post 202 mutually supporting, the reason is higher than on the spacing guide way 201 on the joint piece 501.

In order to further improve the stability of the installation of the voltage measurement sliding cover 5 on the test bench 2, the clamping column 202 is prism-shaped. The voltage measuring slide 5 can be further prevented from moving sideways.

During the installation, at first aim at spacing guide way 201 on the testboard 2 with the joint piece 501 of voltage measurement sliding closure 5 lower extreme, later promote voltage measurement sliding closure 5 along the horizontal direction of spacing guide way 201, make the constant head tank 502 on the joint piece 501 aim at joint post 202, later down screw lock nut 203, fix the upper end of joint piece 501, avoid it to reciprocate, realized the fixed of the relative testboard 2 of voltage measurement sliding closure 5.

Wherein, a sliding guide rail 601 is installed at one end of the lower surface of the sliding mounting plate 6, and one of the voltage clamps 4 is slidably installed on the sliding guide rail 601 and fixed with the sliding mounting plate 6 through a locking member (not shown in the figure).

The voltage clamp 4 comprises a clamp plate 401, a lateral limiting guide rail 402 is arranged in the direction, perpendicular to the test board 2, of the clamp plate 401, a bidirectional lead screw 403 is installed on the lateral limiting guide rail 402, two ends of the bidirectional lead screw 403 are installed through a lead screw seat 407, two lead screw nut sliders 404 limited between the lateral limiting guide rail 402 are installed on the bidirectional lead screw 403, cable clamping plates 405 are installed on the lead screw nut sliders 404 respectively, and the bidirectional lead screw 403 is driven to rotate through a first motor 406. One of the clamp plates 401 is slidably mounted on a sliding guide rail 601.

The two voltage clamps 4 are synchronously opened and closed through a first power assembly 7. Specifically, the method comprises the following steps:

the first power assembly 7 comprises a first belt pulley 701 and a second belt pulley 702 which are respectively sleeved on two rotating shafts of the bidirectional screw 403, a third belt pulley 704 is adjustably mounted on the sliding mounting plate 6 through a mounting seat 703, the first belt pulley 701, the second belt pulley 702 and the third belt pulley 704 are connected through a belt 705, and the first motor 406 drives one of the bidirectional screw 403 to rotate.

The mounting seat 703 comprises a sleeving rail 706 and a lifting mounting plate 707 slidably mounted on the sleeving rail 706, wherein a vertical rack 708 is arranged on one side of the lifting mounting plate 707, the vertical rack 708 is engaged with a first gear 710 driven to rotate by a handle 709, a wheel shaft 711 is mounted at the upper end of the lifting mounting plate 707 in a rolling manner, and the third belt pulley 704 is sleeved on the wheel shaft 711.

The handle 709 is manually rotated to drive the first gear 710 to rotate, and the lifting mounting plate 707 on which the vertical rack 708 is engaged with the first gear 710 moves up and down along the coupling rail 706, so as to adjust the position of the third belt pulley 704 on the lifting mounting plate 707 and the tension state of the belt 705.

The sliding mounting plate 6 is driven by a second power assembly 8 to move horizontally along the voltage measuring slide cover 5. Specifically, the method comprises the following steps:

the second power assembly 8 comprises a moving latch 801 mounted on the upper surface of the sliding mounting plate 6, a second gear 802 is mounted above the moving latch 801 in a meshing manner, and the second gear 802 is driven to rotate by a second motor 803. The second motor 803 can drive the sliding mounting plate 6 on which the moving latch 801 is located to move back and forth along the horizontal direction of the voltage measuring sliding cover 5, so that the two voltage clamps 4 mounted on the sliding mounting plate 6 move synchronously.

A graduated scale 9 is arranged between the two voltage clamps 4 on the sliding mounting plate 6. The zero scale of the graduated scale 9 is close to one side of the voltage clamp 4 fixedly mounted on the sliding mounting plate 6.

The working principle of the device of the invention is as follows:

firstly, distance adjustment:

the distance between the two voltage clamps 4 is adjusted as required, for example, in the embodiment of the present invention, the distance between the two voltage clamps 4 is always kept to be 1m in multiple measurements, specifically: moving one of the voltage clamps 4 along the slide guide rail 601 on the slide mounting plate 6 to make the distance between the voltage clamp 4 and the fixedly mounted voltage clamp read a value of 1m on the scale 9, and fixing the movable voltage clamp 4 on the slide mounting plate 6 through a fixing member (not shown in the figure);

then, the handle 709 is rotated manually, so that the belt 705 among the first belt pulley 701, the second belt pulley 702 and the third belt pulley 704 is in a tensioning state;

secondly, cable installation: clamping the cable to be tested between the two current clamps 3 according to the conventional mode, and straightening the cable between the two current clamps, wherein the current clamps 3 have the same structure as the common current clamps 3, and the details are omitted;

thirdly, measurement: then, the voltage measuring sliding cover 5 with the distance of the voltage clamp 4 adjusted is aligned with the test bench 2 to be installed, so that the two cable clamping plates 405 of the two voltage clamps 4 are both in a state of ready clamping at two sides of the cable to be tested;

starting a first motor 406 to enable a bidirectional lead screw 403 connected with the first motor 406 to rotate, driving two bidirectional lead screws 403 where a first belt pulley 701 and a second belt pulley 702 are located to synchronously rotate through a belt 705 by the rotated bidirectional lead screw 403, enabling two lead screw nut sliders 404 installed on the bidirectional lead screws 403 to oppositely move, and enabling two cable clamping plates 405 on the bidirectional lead screws to clamp a cable to be tested to start testing;

after the test is finished for one time, the first motor 406 is rotated reversely, the voltage clamp 4 is enabled to release the clamping of the cable, then the second motor 803 is started, the two voltage clamps 4 with fixed intervals on the sliding mounting plate 6 are enabled to move for a certain distance along with the sliding mounting plate 6 and then stop again, the first motor 406 is started to clamp and measure the cable again, the resistance value of the cable to be measured can be measured for many times rapidly by adopting the method, and the average value of the resistance is taken as the final measurement result. On one hand, the synchronous movement can be realized after the distance between the voltage clamps 4 is adjusted, so that the quantitative change of the distance between the voltage clamps 4 in the independent movement process of the voltage clamps 4 is avoided, and the influence on the measurement result is reduced; on the other hand, the multiple clamping of the voltage clamp 4 to the cable to be tested is realized through a mechanical mode instead of manual work, so that the measuring efficiency is improved, and the test error caused by uneven clamping force generated by manual adjustment can be reduced.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.