CN214201626U - Cable shielding performance testing device - Google Patents

Abstract

The utility model discloses a cable shielding performance testing arrangement relates to cable production facility technical field, which comprises a bracket, be equipped with testing arrangement on the support, testing arrangement includes control cabinet, brush, motor, the control cabinet includes test power supply, motor speed adjusting device, ampere meter, the ampere meter with brush electric connection, the motor is used for the drive the brush is rotatory, test power supply is used for to being surveyed the cable circular telegram, the brush is used for the cutting to be surveyed the electromagnetic field that produces when electric cable circular telegram, the utility model is used for cable shielding performance's quick test can accomplish the shielding performance test work of whole root length cable in the short time, solves current testing arrangement efficiency problem that hangs down excessively.

Description

Cable shielding performance testing device

Technical Field

The utility model relates to a cable production facility technical field specifically is a cable shielding capability test device.

Background

The cable is used as the blood vessel of a city power supply system, the power cable plays an important role in transmitting required electric energy for production and life of a city, and the consumption of the power cable is increased rapidly along with the rapid development of a power utility.

The structure of the cable comprises a core layer, an inner insulating layer, a metal shielding layer and an outer insulating layer, wherein the metal shielding layer is used for isolating an electric field inside and outside the cable, the interference of an electromagnetic field generated when current passes through the cable on other nearby elements is avoided, after the cable is produced, the shielding performance of the cable needs to be tested, two test modes are mainly adopted, one mode is indirect measurement through transfer impedance, the other mode is direct measurement of the ratio of the field intensity or power radiated or received when the cable is provided with or not provided with the shielding layer, the length of the cable is generally tens of meters or even hundreds of meters, the cable needs to be straightened when the existing shielding performance testing device is used for testing, only a small section of the cable can be tested at the same time, and the efficiency is extremely low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the utility model provides a cable shielding performance testing arrangement, can accomplish the shielding performance test work of whole root length cable in the short time, solve the problem that current testing arrangement efficiency is low excessively.

The utility model adopts the technical scheme as follows:

the utility model provides a cable shielding performance testing arrangement, includes the support, be equipped with testing arrangement on the support, testing arrangement includes control cabinet, brush, motor, the control cabinet is including test power supply, motor rotational speed adjusting device, ampere meter, the ampere meter with brush electric connection, the motor is used for the drive the brush is rotatory, test power supply is used for to being surveyed cable circular telegram, the brush is used for cutting the electromagnetic field that produces when being surveyed cable circular telegram.

Further, the brush includes wiring end, brush head, the wiring end includes first becket, first binding post, second becket, second binding post, first becket with first binding post passes through the wire and connects, the second becket with second binding post passes through the wire and connects, first binding post, second binding post with ampere meter electric connection.

Further, the brush head includes pivot, L shape pole, metal bar, the pivot with motor power connects, L shape pole with the terminal fixed connection of pivot, L shape pole is kept away from the one end of pivot is equipped with the metal bar, still be equipped with first wiring foot, second wiring foot in the pivot, first wiring foot, second wiring foot respectively with the both ends of metal sheet are passed through the wire and are connected, first wiring foot, second wiring foot respectively with first becket, second becket electrical contact, first wiring foot, second wiring foot wind the rotatory orbit of pivot respectively with the lower surface coincidence of first becket, second becket.

Further, the support includes base, montant, crossbeam, the both ends of montant respectively with base, crossbeam fixed connection, the control cabinet fixed mounting be in on the base, the motor is installed the crossbeam top, keep away from on the crossbeam one side of motor is equipped with the balancing weight.

Furthermore, the L-shaped rod, the rotating shaft and the cross beam are made of insulating materials.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

(1) the cable is usually twined on the roller when packing, can be regarded as a coil, the utility model discloses a to the cable circular telegram of winding on the roller, thereby produce the electromagnetic field, then use the overhead metal bar of brush to press certain rotational speed cutting magnetic field, produce induced-current in the metal bar, and the size through ampere meter measuring current, can reflect the shielding effect of cable shielding layer, need not to expand the cable, shielding effect is better, the electromagnetic field intensity that produces is less, the electric current that records is less, if the electric current is great, the shielding effect of the metal shielding layer of the cable of being surveyed is relatively poor for the explanation, because the cable of being surveyed tests with the form of winding on the roller, carry out the detection that one-time test can accomplish tens meters and even hundreds of meters long cable, and test equipment is small, and the floor area is little.

(2) Through setting up first becket, second becket replacement wire connection terminal and binding post, wire winding in the epaxial problem of commentaries on classics when can avoiding using the wire to connect.

Drawings

Fig. 1 is a front view structure diagram of the present invention.

Fig. 2 is a bottom view of the cross member.

Fig. 3 is a demonstration diagram of the usage status of the present invention.

Fig. 4 is an enlarged view of a portion a in fig. 1.

The labels in the figure are: 1-console, 2-electric brush, 3-motor, 4-test power supply, 5-motor speed adjusting device, 6-ammeter, 7-first metal ring, 8-first wiring terminal, 9-second metal ring, 10-second wiring terminal, 11-rotating shaft, 12-L-shaped rod, 13-metal rod, 14-first wiring pin, 15-second wiring pin, 16-base, 17-vertical rod, 18-cross beam, 19-counterweight block and 20-roller bolt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1

The utility model provides a cable shielding capability test device, which comprises a bracket, be equipped with testing arrangement on the support, testing arrangement includes control cabinet 1, brush 2, motor 3, control cabinet 1 includes test power supply 4, motor speed adjusting device 5, ampere meter 6 and 2 electric connection of brush, motor 3 is used for driving brush 2 rotation, test power supply 4 is used for leading to the cable to be surveyed, brush 2 is used for cutting the electromagnetic field that produces when being surveyed the cable and leading to, motor speed adjusting device 5 is used for adjusting and showing motor 3's rotational speed, ampere meter 6 is used for measuring the induced-current that brush 2 produced.

The brush 2 comprises a wiring end and a brush head, the wiring end comprises a first metal ring 7, a first wiring terminal 8, a second metal ring 9 and a second wiring terminal 10, the first metal ring 7 is connected with the first wiring terminal 8 through a conducting wire, the second metal ring 9 is connected with the second wiring terminal 10 through a conducting wire, the first wiring terminal 8 and the second wiring terminal 10 are electrically connected with an ammeter 6, the brush head comprises a rotating shaft 11, an L-shaped rod 12 and a metal rod 13, the rotating shaft 11 is in power connection with the motor 3, the L-shaped rod 12 is fixedly connected with the tail end of the rotating shaft 11, one end of the L-shaped rod 12, which is far away from the rotating shaft 11, is provided with the metal rod 13, the rotating shaft 11 is also provided with a first wiring pin 14 and a second wiring pin 15, the first wiring pin 14 and the second wiring pin 15 are respectively connected with two ends of the metal rod 13 through conducting wires, the first wiring pin 14 and the second wiring pin 15 are respectively in electrical contact with the first metal ring 7 and the second metal ring 9, the tracks of the first wiring pin 14 and the second wiring pin 15 rotating around the rotating shaft 11 coincide with the lower surfaces of the first metal ring 7 and the second metal ring 9 respectively, the first metal ring 7, the first wiring terminal 8, the second metal ring 9, the second wiring terminal 10, the first wiring pin 14 and the second wiring pin 15 are made of copper, and springs are arranged in the middle of the first wiring pin 14 and the second wiring pin 15 to ensure that the first wiring pin 7 and the second metal ring 9 can be in close contact with each other.

The support includes base 16, montant 17, crossbeam 18, the both ends of montant 17 respectively with base 16, crossbeam 18 fixed connection, 1 fixed mounting of control cabinet is on base 16, motor 3 installs in crossbeam 18 top, the one side of keeping away from motor 3 on crossbeam 18 is equipped with balancing weight 19, fixed mounting has roller bolt 20 on the base 16, a roller for placing the winding has the cable that awaits measuring, bar 13 is perpendicular with roller bolt 20, the rotation plane perpendicular to the magnetic induction line of the electromagnetic field that the cable produced of rotation that forms when making bar 13 rotate along with pivot 2.

The L-shaped rod 12, the rotating shaft 11 and the cross beam 18 are made of hard plastics, so that the insulating effect is good, and short circuit is prevented.

The working principle is as follows: as shown in figure 3, when the device is used, a roller wound with a cable to be tested is inserted into a roller bolt 20, the axis of the roller is kept coincident with a rotating shaft 2, then two ends of the cable are connected with a testing power supply 4, a motor 3 is started, the testing power supply 4 is used for electrifying the cable, an electromagnetic field generated when the metal rod 13 cuts the cable is enabled, induced current is generated in the metal rod 13 at the moment, the induced current is respectively transmitted to a first wiring pin 14 and a second wiring pin 15 through wires at two ends of the metal rod 13, and then transmitted to a first wiring terminal 8 and a second wiring terminal 10 through a first metal ring 7 and a second metal ring 9, and then the induced current is electrically connected with an ammeter 6 through wires, so that the magnitude of the current is displayed through the ammeter 6, and the magnitude of the current can reflect the shielding performance of the cable.

In addition, the cable without the metal shielding net can be manufactured and measured under the same condition, the measured current is used as an endpoint value, the current measured by the cable which is qualified in the test is used as a standard value, and then the current data measured by the cable to be tested is compared with the endpoint value and the standard value to evaluate the shielding performance of the cable to be tested.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (5)

1. The utility model provides a cable shielding capability test device, includes the support, be equipped with testing arrangement on the support, a serial communication port, testing arrangement includes control cabinet (1), brush (2), motor (3), control cabinet (1) is including test power supply (4), motor rotational speed adjusting device (5), ampere meter (6) with brush (2) electric connection, motor (3) are used for the drive brush (2) are rotatory, test power supply (4) are used for to being surveyed cable circular telegram, brush (2) are used for cutting the electromagnetic field that produces when being surveyed cable circular telegram.

2. The cable shielding performance testing device according to claim 1, wherein the brush (2) comprises a terminal and a brush head, the terminal comprises a first metal ring (7), a first wiring terminal (8), a second metal ring (9) and a second wiring terminal (10), the first metal ring (7) and the first wiring terminal (8) are connected through a conducting wire, the second metal ring (9) and the second wiring terminal (10) are connected through a conducting wire, and the first wiring terminal (8) and the second wiring terminal (10) are electrically connected with the ammeter (6).

3. The cable shielding performance testing device according to claim 2, wherein the brush head comprises a rotating shaft (11), an L-shaped rod (12) and a metal rod (13), the rotating shaft (11) is in power connection with the motor (3), the L-shaped rod (12) is fixedly connected with the tail end of the rotating shaft (11), one end of the L-shaped rod (12) far away from the rotating shaft (11) is provided with the metal rod (13), the rotating shaft (11) is further provided with a first wiring pin (14) and a second wiring pin (15), the first wiring pin (14) and the second wiring pin (15) are respectively connected with two ends of the metal rod (13) through conducting wires, the first wiring pin (14) and the second wiring pin (15) are respectively in electrical contact with the first metal ring (7) and the second metal ring (9), and the rotating tracks of the first wiring pin (14) and the second wiring pin (15) around the rotating shaft (11) are respectively connected with the first metal ring (7) ) The lower surfaces of the second metal rings (9) are overlapped.

4. The cable shielding performance testing device according to claim 3, wherein the support comprises a base (16), a vertical rod (17) and a cross beam (18), two ends of the vertical rod (17) are respectively and fixedly connected with the base (16) and the cross beam (18), the console (1) is fixedly installed on the base (16), the motor (3) is installed above the cross beam (18), and a balancing weight (19) is arranged on one side of the cross beam (18) far away from the motor (3).

5. The cable shielding performance testing device according to claim 4, wherein the L-shaped rod (12), the rotating shaft (11) and the cross beam (18) are made of insulating materials.

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