CN205038295U - Detection apparatus for improve withstand voltage detection efficiency of cable - Google Patents

Abstract

The utility model discloses a detection device for improving the efficiency of cable withstand voltage detection. The inside of the bottom of three oil cup terminals is provided with a thimble part which is in conductive contact with the conductors of three cable core wires. The high-voltage electrical connector seat is electrically connected to the cable core wire conductor. The high-voltage electrical connector seat is equipped with a high-voltage electrical connector and a thimble base. The inner end of the high-voltage electrical connector is electrically connected to the cable core wire conductor through the thimble. The three core cables The core wire conductors complete the parallel electrical connection of the three cable core wire conductors through the high-voltage electrical connectors. The upper end of each oil cup is provided with a locking cup cover that is locked and connected to the outer protective layers of the three cable cores respectively. Connect the three cable core wire conductors in parallel to lead out a high-voltage electrical connecting wire, and connect the metal shielding layer of the three-core finished cable to lead out a high-voltage test ground wire. The high-voltage electrical output terminals of the equipment are electrically connected to each other. Improve production testing efficiency and reduce testing costs.

Description

A detection device for improving the efficiency of cable withstand voltage detection

technical field

The utility model relates to a detection device, in particular to a detection device used in a cable detection withstand voltage test.

Background technique

Generally, XLPE insulated power cables are widely used for their excellent electrical properties and mechanical and physical properties. For medium-voltage power cables with a rated voltage of 6kV to 30kV, the withstand voltage test of the cable before leaving the factory is an example of the product. Experimentation is also essential. Usually, the withstand voltage test is to apply a certain voltage to the insulation of the product under certain conditions, and after a certain period of time, whether the insulation breaks down is used as the standard for judging whether the cable is qualified. The traditional test method is to apply a voltage between each conductor and the metal shielding layer, and the pressure time is 5 minutes. This traditional test method is for the three-core finished cable. In order to complete the test of the entire cable, It usually takes about 20 minutes to complete, including core replacement and withstand voltage time. Moreover, professional configuration is required for the required withstand voltage test site and the required professional use of the series resonant system, which is expensive to equip, so the general cable manufacturers usually use only one set of testing equipment. However, when there are many orders and heavy inspection tasks, there will be chaos in the site, no time for inspection, and low efficiency, which will make it difficult to guarantee timely delivery and reduce the company's production capacity and reputation.

Utility model content

The utility model solves the current situation of the existing cross-linked polyethylene insulated power cable that the detection time for the three-core finished product is long, the detection efficiency is low, the production efficiency is low, and the production site is chaotic. It is convenient and fast, has high detection efficiency, improves detection capacity, improves product production efficiency, and can reduce detection costs on the basis of existing detection configuration equipment. It is a detection device that improves the efficiency of cable withstand voltage detection.

The specific technical solution adopted by the utility model to solve the above-mentioned technical problems is: a detection device for improving the efficiency of cable withstand voltage detection, which is characterized in that it includes three oil cup terminals, and the inside of each oil cup terminal is provided with three The thimble part of each core wire conductor of the three-core finished cable is in conductive contact with each other. There is a high-voltage electrical connector seat that electrically connects each core wire conductor of the three-core finished cable on the outside of the bottom of each oil cup. There are high-voltage electrical connectors and thimble bases on the electrical connector seat. The inner end of the high-voltage electrical connector is electrically connected to the cable core wire conductor through the thimble. Each core wire conductor of the three-core finished cable completes three The parallel electrical connection of the cable core wire conductors, the upper end of each oil cup is provided with a locking cup cover that is locked and connected with the outer protective layer of each core cable core of the three-core finished cable, and the outer end of the high-voltage electrical connector connects the three cores The three core wire conductors of the finished cable are connected in parallel to lead out a high-voltage electrical connection line, and the metal shielding layer of the three-core finished cable is connected to lead out a high-voltage test ground wire. The high voltage output terminals of the test equipment are electrically connected to each other. The three core wires of the cable are connected in parallel, and the high-voltage output voltage is simultaneously applied between the conductor of each core wire of the cable and the metal shielding layer during detection. The time spent on completing the test in the withstand voltage test of the testing test item is greatly reduced, the production testing efficiency is improved, and the testing cost is reduced.

Preferably, the thimble part includes several thimbles, and springs are provided at the bottom of the thimbles; the high-voltage electrical connector seat is made of metal material, forming an electrical connector connecting the thimbles and the high-voltage electrical connector. Improve the reliability and stability of the conductive contact between the thimble part and the conductor of each core cable core wire.

Preferably, the thimble base is provided with a thimble spring and a thimble spring installation groove. Improve the reliability and stability of the conductive contact between the thimble part and the conductor of each core cable core wire.

Preferably, a transverse spring piece is arranged between the thimbles. Improve the conductive contact feel and the sense of hearing effect between the thimble and the conductor of each core cable.

Preferably, the outer circumference of the thimble part is provided with a thimble outer peripheral protection wall, the height of the top of the thimble outer peripheral protection wall is higher than the height of the top of the thimble pin, and the upper end of the thimble outer peripheral protection wall is tilted outward. Improve the reliability and stability of the conductive contact between the thimble part and the conductor of each core cable core wire.

The beneficial effects of the utility model are: the three core wires of the cable are connected in parallel, and the high-voltage output voltage is simultaneously applied between each core wire conductor of the cable and the metal shielding layer during detection. The time required to complete the test of the polyethylene insulated cable in the withstand voltage test of the routine inspection test item of the cable factory is greatly reduced, which improves the production inspection efficiency and reduces the inspection cost. Usually the detection time can be reduced from 20 minutes to 8 minutes. During the test process, the test time is reduced and the detection efficiency is improved. And the implementation of this scheme can meet the product delivery requirements to the greatest extent under the condition that the existing testing equipment is equipped.

Description of drawings:

The utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a structural schematic diagram of a preferred embodiment of a detection device for improving cable withstand voltage detection efficiency of the present invention.

detailed description

In the embodiment shown in Figure 1, a detection device for improving the efficiency of cable withstand voltage detection includes three oil cup terminals 10, and the inner side of the bottom of each oil cup terminal 10 is provided with each core cable core wire of the three-core finished cable The thimble part of the conductive contact with the conductor 21. After the cable outer sheath 23 and inner protective layer 22 are stripped off at the end of each core cable core wire 20, the conductor 21 of the cable core wire is left to be installed in conductive contact with the thimble pin. Each oil cup The outside of the cup bottom 11 is provided with a high-voltage electrical connector seat 30 that electrically connects each core wire conductor of the three-core finished cable. The high-voltage electrical connector seat 30 is provided with a high-voltage electrical connector 31 and a thimble base 35. The inner end of the electrical connector is electrically connected to the conductor of the cable core wire through a thimble. Each core wire conductor of the three-core finished cable completes the parallel electrical connection of the three cable core wire conductors through a high-voltage electrical connector. The upper end of each oil cup A locking cup cover that is locked and connected to the outer protective layer of each core of the three-core finished cable is installed, and the outer end of the high-voltage electrical connector connects the three core conductors of the three-core finished cable in parallel to lead out a The electrical connecting wire 40 is connected with the metal shielding layer of the three-core finished cable to lead out a high-voltage test ground wire, and the high-voltage electrical connecting wire and the high-voltage test ground wire are electrically connected to the high-voltage output terminal of the high-voltage test equipment together. The thimble part includes a plurality of thimbles 32, and springs are provided at the bottom of the thimbles; the high-voltage electrical connector seat is made of metal material, forming an electrical connector connecting the thimbles and the high-voltage electrical connector. The thimble base 35 is provided with a thimble spring and a thimble spring mounting groove 34 . A transverse spring piece 33 is arranged between the thimbles. The outer circumference of the thimble part is provided with a thimble outer peripheral wall 36, the height of the top of the thimble outer peripheral wall is higher than the height of the top of the thimble, and the upper end of the thimble outer peripheral wall is tilted outwards.

Install the three cables of each core in the oil cup terminal respectively, connect the three terminals in parallel at the outer end of the oil cup, and make a high-voltage electrical connection with the high-voltage output end of the device; finally, boost the voltage of the device to the level of the product Voltage is required, and the time required for the test is maintained. After the time is over, the oil cup is removed.

Although terms such as three-core finished cables, high-voltage electrical connectors, locking cup covers, and thimble spring installation slots are frequently used in this article; the possibility of using other terms is not excluded. These terms are used only for the purpose of describing and explaining the essence of the present invention more conveniently; interpreting them as any kind of additional limitation is against the spirit of the present invention.

Claims (5)

1. A detection device for improving the efficiency of cable withstand voltage detection, characterized in that: it includes three oil cup terminals, and the inner side of the bottom of each oil cup terminal is provided with a conductive contact with each core cable conductor of the three-core finished cable. As for the thimble part, there is a high-voltage electrical connector seat that electrically connects the conductors of each core wire of the three-core finished cable on the outer side of the bottom of each oil cup. The high-voltage electrical connector seat is provided with a high-voltage electrical connector and a thimble base. The inner end of the high-voltage electrical connector is electrically connected to the cable core wire conductor through the thimble, and each core wire conductor of the three-core finished cable completes the parallel electrical connection of the three cable core wire conductors through the high-voltage electrical connector. The upper end of the mouth is provided with a locking cup cover that is locked and connected to the outer protective layer of each core of the three-core finished cable. The high-voltage electrical connection line, the metal shielding layer of the three-core finished cable is connected to a high-voltage test ground wire, and the high-voltage electrical connection line and the high-voltage test ground wire are electrically connected to the high-voltage output terminal of the high-voltage test equipment. 2. According to the detection device for improving the efficiency of cable withstand voltage detection according to claim 1, it is characterized in that: the thimble part includes several thimbles, and a spring is provided at the bottom of the thimble; An electrical connection connecting the thimble and the high-voltage electrical connector. 3. The detection device for improving the efficiency of cable withstand voltage detection according to claim 1, characterized in that: the thimble base is provided with a thimble spring and a thimble spring installation groove. 4. The detection device for improving the efficiency of cable withstand voltage detection according to claim 1 or 2, characterized in that: a transverse spring piece is arranged between the thimbles. 5. The detection device for improving the efficiency of cable withstand voltage detection according to claim 1, characterized in that: the outer periphery of the thimble part is provided with a thimble outer peripheral wall, the height of the top of the thimble outer peripheral wall is higher than the height of the top of the thimble, and the upper end of the thimble outer peripheral wall Flip out at an angle.