CN206820131U - Connection device for specimen between inner conductor and shielding layer of shielded cable - Google Patents

Abstract

The utility model provides a kind of inner wire of shielded cable and shields the attachment means of interlayer sample, attachment means, including：Shielded-plate tube；Along the axial direction of shielded-plate tube, locking member and matching block are sequentially installed with the inwall of shielded-plate tube；Locking member clamps the screen layer for the shielded cable to be measured being inserted in shielded-plate tube；Welding matching exemplar, has axial gap between matching block and shielded cable to be measured on matching block；Thimble is equipped with matching block, and thimble is inserted in the inner wire of shielded cable to be measured；Shielded-plate tube, locking member, matching block and thimble are conductor.Matching exemplar is installed using attachment means of the present utility model, it is not necessary to shielded cable to be measured is welded, the locking member of attachment means, the installation of matching block and thimble, convenient disassembly are simple and efficient to handle.

Description

Connection device for specimen between inner conductor and shielding layer of shielded cable

technical field

The utility model relates to the technical field of testing of shielded cables, in particular to a connection device for a sample between an inner conductor of a shielded cable and a shielding layer.

Background technique

When testing certain properties of the shielded cable to be tested, it is often required to weld a matching resistor between the shielding layer of the shielded cable to be tested and the inner conductor, as shown in Figure 1, the matching resistor 1 is welded to the inner shielding system 2 Above, the matching resistor 1 is welded to the inner conductor 31 of the shielded cable 3 to be tested, the shielding layer 32 of the shielded cable 3 is welded to the inner shielding system 2, and the end of the inner conductor 31 far away from the matching resistor 1 is connected to the signal generator 4, and the matching resistor 1 is connected with signal receiver 5. The value of the matching resistor is equal to the characteristic impedance of the shielded cable to be tested. The existing technology is to match the inner conductor of the shielded cable to be tested with the shielding layer by welding chip resistors, but this method is only suitable for shielded cables with small wire diameters to be tested. For charging pile cables, road traffic and other types of cables, the inner conductor is not a conventional single solid conductor or multi-stranded wire structure, usually composed of dozens or even hundreds of metal wires, and the outer diameter of the shielding layer is large , it is very inconvenient to use the welding method, and during the welding operation, because the wire diameter of the inner conductor is relatively thick, a high-power soldering iron must be used, otherwise it will not be welded and safety problems will easily occur. Insecure solder joints between chip resistors and shielding layers lead to breakage, making it impossible to test, or the solder joints between inner conductors, chip resistors, and shielding layers are too large, resulting in deviations in test data.

Utility model content

In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the utility model is to provide a connection device between the inner conductor of the shielded cable and the sample between the shielding layers.

In order to solve the above technical problems, the utility model provides a connection device between the inner conductor of the shielded cable and the shielding layer, including: a shielding tube; along the axial direction of the shielding tube, on the inner wall of the shielding tube A ring-shaped locking part and a ring-shaped matching part are installed in sequence; the locking part clamps the shielding layer of the shielded cable to be tested and inserted into the shielding tube; the matching sample is welded on the matching part, and the matching There is an axial gap between the component and the shielded cable to be tested; a thimble is pierced through the matching component, and the thimble is inserted into the inner conductor of the shielded cable to be tested; the shielded tube, the The locking part, the matching part and the thimble are all conductors.

Preferably, the connection device further includes an insulating ring, the insulating ring is arranged in the axial gap between the matching component and the shielded cable to be tested, and the insulating ring is connected to the shielded cable to be tested in the shielding tube. The shielded cable is in contact, and the inner diameter of the insulating ring is smaller than the diameter of the inner conductor of the shielded cable to be tested, and the outer diameter of the insulating ring is larger than the diameter of the inner conductor of the shielded cable to be tested.

Further, an annular groove for inserting the insulating ring is provided on a side of the matching component close to the shielded cable to be tested.

Furthermore, the matching component includes a top cover, a circuit board and a base installed in sequence along the axial direction, the base is connected to the inner wall of the shielding tube, and the top cover and the circuit board are connected to the shielding tube Without contact, the matching sample is welded on the circuit board, and the thimble is passed through the top cover.

Still further, the top cover, the circuit board and the base are all ring-shaped, the size of the inner ring of the circuit board is smaller than the size of the inner ring of the base, and the body of the top cover is close to the circuit board An annular insertion portion is provided on one side, the insertion portion passes through the circuit board, and the outer ring surface of the insertion portion, the circuit board and the inner ring surface of the base enclose the annular groove .

Preferably, the locking part includes: a locking sleeve and two semicircular shielding rings, the inner wall of one end of the locking sleeve is tapered, and the diameter of the outer wall of one end of each of the shielding rings is gradually decrease outward, the two shielding rings are sleeved on the shielding layer of the shielded cable to be tested, the inner wall of the locking sleeve is tapered, and one end is sleeved on the outer wall of the two shielding rings. On one end whose diameter gradually decreases outward, the locking sleeve is installed in the shielding tube.

Further, one end of the shielding pipe is provided with a blocking portion, and the two shielding rings abut against the blocking portion.

As mentioned above, the connection device between the inner conductor and the shielding layer of the shielded cable of the present invention has the following beneficial effects:

When the utility model is used, the matching sample to be installed between the inner conductor of the shielded cable and the shielding layer is welded on the matching part, and the ring-shaped locking part and the ring-shaped matching part are sequentially installed inside the shielding tube and locked. The component clamps the shielding layer of the shielded cable to be tested, and the thimble that passes through the matching component is inserted into the inner conductor of the shielded cable to be tested, so as to realize the installation of a matching sample between the inner conductor of the shielded cable and the shielding layer. parts; using the connecting device of the utility model to install matching samples, there is no need to weld the shielded cable to be tested, the locking parts, matching parts and thimbles of the connecting device are easy to install and disassemble, and the operation is simple and fast The sample preparation time of the shielded cable to be tested is short, no welding is required, and there is no potential safety hazard, and the performance of the shielded cable to be tested is maintained to the greatest extent, thereby minimizing the influence of human factors on the test.

Description of drawings

FIG. 1 is a schematic cross-sectional view showing the connection matching resistance between the inner conductor and the shielding layer of the existing shielded cable to be tested.

FIG. 2 is a schematic cross-sectional structure diagram after installation of the connecting device between the inner conductor and the shielding layer of the shielded cable of this embodiment.

FIG. 3 shows a schematic cross-sectional structure diagram of a locking component installed in the connection device between the inner conductor and the shielding layer of the sample of the shielded cable of this embodiment.

FIG. 4 shows a schematic cross-sectional structure diagram of a matching component installed in the connection device between the inner conductor and the shielding layer of the shielded cable according to this embodiment.

FIG. 5 shows a schematic cross-sectional structure diagram of a thimble installed in the connection device between the inner conductor and the shielding layer of the shielded cable according to this embodiment.

FIG. 6 is a three-dimensional structural schematic view of the circuit board and the base of the connection device between the inner conductor and the shielding layer of the sample of the shielded cable of this embodiment after installation.

FIG. 7 is a perspective view showing the three-dimensional structure of the connecting device top cover installed on the circuit board of the sample between the inner conductor and the shielding layer of the shielded cable of this embodiment.

FIG. 8 is a schematic perspective view of the three-dimensional structure of the shielding ring of the connection device between the inner conductor and the shielding layer of the shielded cable according to this embodiment.

FIG. 9 is a schematic cross-sectional perspective view of the locking sleeve of the connecting device between the inner conductor and the shielding layer of the shielded cable according to this embodiment.

Explanation of reference numbers

1 matching resistor

2 Inner shielding system

3 shielded cable

31 inner conductor

32 shielding layer

4 signal generators

5 signal receiver

100 shielding tube

110 blocking part

200 locking parts

210 Locking sleeve

220 shielding ring

300 matching parts

310 Ring Groove

320 top cover

321 Insertion part

330 circuit board

340 base

350 mounting slot

360 serial connection

400 shielded cable

440 Shield

420 inner conductor

410 Inner Conductor Insulation Sheath

430 outer insulating sheath

500 Thimbles

600 insulating ring

70 socket wrench

80 screwdriver

detailed description

The implementation of the present utility model is illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

Please refer to attached picture. It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the utility model Therefore, it has no technical substantive meaning. Any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of Within the scope covered by the technical content disclosed by the utility model. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit this specification. The practicable range of the utility model, and the change or adjustment of its relative relationship, without any substantial change in the technical content, shall also be regarded as the practicable scope of the utility model.

As shown in Figures 2 to 9, the connection device between the inner conductor and the shielding layer of the shielded cable of this embodiment includes:

shielding tube 100;

Along the axial direction of the shielding tube 100, an annular locking component 200 and an annular matching component 300 are sequentially installed on the inner wall of the shielding tube 100;

The locking component 200 clamps the shielding layer 440 of the shielded cable 400 to be tested inserted into the shielding tube 100;

The matching sample is welded on the matching part 300, and there is an axial gap between the matching part 300 and the shielded cable 400 to be tested; a thimble 500 is pierced through the matching part 300, and the thimble 500 is inserted into the inner conductor of the shielded cable 400 to be tested 420 in;

The shielding tube 100, the locking part 200, the matching part 300 and the thimble 500 are all conductors.

The shielded cable 400 to be tested includes an inner conductor 420, an inner conductor insulating sheath 410, a shielding layer 440 and an outer insulating sheath 430 arranged sequentially from the inside to the outside. When the utility model is used, the inner conductor of the shielded cable 400 to be tested The matching sample to be installed between 420 and the shielding layer 440 is welded on the matching part 300, the ring-shaped locking part 200 and the ring-shaped matching part 300 are sequentially installed inside the shielding tube 100, and the locking part 200 is clamped to be The shielding layer 440 of the shielded cable 400 to be tested, and the thimble 500 passing through the matching part 300 is inserted into the inner conductor 420 of the shielded cable 400 to be tested, because the shielding tube 100, the locking part 200, the matching part 300 and the thimble 500 are conductors, the inner conductor 420 of the shielded cable 400 to be tested is connected to the matching component 300 through the thimble 500, and the shielding layer 440 of the shielded cable 400 to be tested is connected to the matching component 300 through the locking component 200, the shielding tube 100 and the matching component 300. , so that a matching sample can be installed between the inner conductor 420 and the shielding layer 440 of the shielded cable 400; in this embodiment, the matching sample is a matching resistor. In this embodiment, the tip of the thimble 500 is inserted into the inner conductor 420 of the shielded cable 400 to be tested, so as to ensure the conduction between the thimble 500 and the inner conductor 420 of the shielded cable 400 .

Using the connecting device of the present utility model to install matching samples does not need to weld the shielded cable 400 to be tested. The locking part 200, matching part 300 and thimble 500 of the connecting device are easy to install and disassemble, and the operation is simple and fast. For larger The sample preparation time of the shielded cable 400 to be tested is short, no welding is required, and there is no potential safety hazard, and the performance of the shielded cable 400 to be tested is maintained to the greatest extent, thereby minimizing the influence of human factors on the test.

In the prior art, the welding method is used to install the matching sample. Due to the relatively thick wire diameter of the shielded cable 400 to be tested, the welding time is relatively long, and the degree of firmness after welding is relatively small, and false welding is prone to occur. . Using the connection device of this embodiment to realize the installation of matching samples can reduce the step of welding and reduce the time for re-preparation after resistance soldering.

The connection device also includes an insulating ring 600, the insulating ring 600 is arranged in the axial gap between the matching component 300 and the shielded cable 400 to be tested, the insulating ring 600 is in contact with the shielded cable 400 to be tested in the shielding tube 100, and is insulated The inner diameter of the ring 600 is smaller than the diameter of the inner conductor 420 of the shielded cable 400 to be tested, and the outer diameter of the insulating ring 600 is larger than the diameter of the inner conductor 420 of the shielded cable 400 to be tested. The setting of the insulating ring 600 can prevent the matching part 300 from contacting the shielded cable 400 to be tested; the inner diameter of the insulating ring 600 is smaller than the diameter of the inner conductor 420 of the shielded cable 400 to be tested, and the outer diameter of the insulating ring 600 is larger than the shielded cable to be tested The diameter of the inner conductor 420 of 400 can ensure the practical stability of the entire connecting device.

An annular groove 310 for inserting the insulating ring 600 is provided on a side of the matching component 300 close to the shielded cable 400 to be tested. This structure enables the insulating ring 600 to be stably disposed in the annular groove 310 .

For ease of installation, the matching component 300 includes a top cover 320, a circuit board 330 and a base 340 installed in sequence along the axial direction, the base 340 is connected to the inner wall of the shielding tube 100, the top cover 320 and the circuit board 330 are not in contact with the shielding tube 100, The matching resistor is welded on the circuit board 330 , and the thimble 500 is penetrated in the top cover 320 . The top cover 320 , the circuit board 330 and the base 340 are all conductors, and the inner conductor 420 of the shielded cable 400 to be tested is connected to the base 340 through the thimble 500 , the top cover 320 and the circuit board 330 . In this embodiment, the top cover 320 is brass, the base 340 is brass, and the thimble 500 is brass. The top cover 320, the circuit board 330 and the base 340 are connected in series through the serial connection piece 360. In order to ensure that there is no direct conduction between the top cover 320 and the base 340, the series connection piece 360 is made of insulating material, and the series connection piece 360 is a screw.

The top cover 320, the circuit board 330 and the base 340 are all ring-shaped, the inner ring size of the circuit board 330 is smaller than the inner ring size of the base 340, and the body of the top cover 320 is provided with a ring-shaped insertion part 321 on one side close to the circuit board 330, The insertion part 321 passes through the circuit board 330 , and the outer ring surface of the insertion part 321 , the circuit board 330 and the inner ring surface of the base 340 enclose an annular groove 310 . This structure makes the installation of the insulating ring 600 stable, and the side of the insulating ring 600 close to the shielded cable 400 to be tested protrudes from the annular groove 310 to keep an axial gap between the matching component 300 and the shielded cable 400 to be tested.

The base 340 is connected to the inner wall of the shielding tube 100 by screw connections. This structure facilitates the mounting and dismounting of the base 340 .

Both the top cover 320 and the circuit board 330 are provided with two opposite mounting slots 350 . This structure can facilitate the socket wrench 70 to turn the top cover 320 to install the top cover 320 and the circuit board 330 into the shielding tube 100 .

The thimble 500 passes through the insertion part 321 and is threadedly connected with the insertion part 321 . This structure facilitates the installation and removal of the thimble 500 . The thimble 500 can be installed into the insertion part 321 with a screwdriver 80 .

The locking part 200 includes an annular shielding block 210 and an annular locking block 220 connected to the shielding block 210. The inner diameter of the locking block 220 is smaller than the outer diameter of the shielding layer 440 of the shielded cable 400 to be tested. The shielding block 210 and the shielding Tube 100 is connected. The locking block 220 is used to clamp the shielding layer 440 of the shielded cable 400 to be tested, and the shielding block 210 is used to connect the shielding tube 100

The locking component 200 includes: a locking sleeve 210 and two semicircular shielding rings 220, the inner wall of one end of the locking sleeve 210 is tapered, and the diameter of the outer wall of one end of the shielding ring 220 gradually decreases outwards, The two shielding rings 220 are sleeved on the shielding layer 440 of the shielded cable 400 to be tested, and the inner wall of the locking sleeve 210 is tapered and one end is sleeved on the outer wall of the two shielding rings 220 whose diameter gradually decreases outwards. On one end, a locking sleeve 210 is installed in the shielding tube 100 . One end of the outer wall of the shielding ring 220 whose diameter gradually decreases outwards, that is, one end of the outer wall of the shielding ring 220 forms a tapered structure corresponding to the tapered inner wall of the locking sleeve 210, because the inner wall of the locking sleeve 210 is One end of the cone is sleeved on the end of the outer walls of the two shielding rings 220 whose diameters gradually decrease outwards, so that the locking sleeve 210 is pressed against the outer walls of the shielding rings 220, and the shielding rings 220 are pressed against the shielded cable 400 to be tested. The shielding layer 440.

In this embodiment, the outer wall of the locking sleeve 210 is screwed to the inner wall of the shielding tube 100 .

One end of the shielding tube 100 is provided with a blocking portion 110 , and the two shielding rings 220 abut against the blocking portion 110 . The diameter of the outer wall at one end of each shielding ring 220 gradually decreases outwards. After the other end of each shielding ring 220 is installed in the shielding tube 100, it leans against the blocking part 110, and the locking sleeve 210 is sleeved on the two shielding rings. 220 , when the locking sleeve 210 cannot continue to move toward the blocking portion 110 , it means that the locking sleeve 210 is installed, and the blocking portion 110 provides support for each shielding ring 220 .

This embodiment also relates to a method for connecting the inner conductor of the shielded cable and the sample between the shielding layers. The connecting device for the sample between the inner conductor and the shielding layer of the shielded cable comprises the following steps:

1) installing the locking member 200 in the shielding tube 100;

2) Insert the shielding layer 440 of the shielded cable 400 to be tested into the locking member 200, and clamp the shielded layer 440 of the shielded cable 400 to be tested inserted into the shielded tube 100;

3) Install the matching component 300 welded with the matching sample in the shielding tube 100, so that there is an axial gap between the matching component 300 and the shielded cable 400 to be tested;

4) The thimble 500 is passed through the matching component 300 , and the tip of the thimble 500 is inserted into the inner conductor 420 of the shielded cable 400 to be tested.

The connection device also includes an insulating ring 600, the insulating ring 600 is arranged in the axial gap between the matching component 300 and the shielded cable 400 to be tested, the insulating ring 600 is in contact with the shielded cable 400 to be tested in the shielding tube 100, and is insulated The inner diameter of the ring 600 is smaller than the diameter of the inner conductor 420 of the shielded cable 400 to be tested, and the outer diameter of the insulating ring 600 is greater than the diameter of the inner conductor 420 of the shielded cable 400 to be tested; One side is provided with an annular groove 310 for inserting the insulating ring 600; between step 2) and step 3), the insulating ring 600 is inserted into the annular groove 310 of the matching component 300; in step 3), when the insulating ring When 600 is in contact with the shielded cable 400 to be tested in the shielded tube 100, the installation of the matching component 300 is completed.

In step 1), the locking part 200 includes: a locking sleeve 210 and two semicircular shielding rings 220, the inner wall of one end of the locking sleeve 210 is tapered, and the diameter of the outer wall of one end of the shielding ring 220 is gradually decrease outward; one end of the shielding tube 100 is provided with a blocking portion 110; two shielding rings 220 are sleeved on the shielding layer 440 of the shielded cable 400 to be tested, and the two shielding rings 220 are inserted into the shielding tube 100. The other end of each shielding ring 220 leans against the blocking portion 110, and the locking sleeve 210 is installed in the shielding tube 100. The inner wall of the locking sleeve 210 is tapered and one end is sleeved on the diameter of the outer wall of the two shielding rings 220. On the end that gradually decreases outward, the locking sleeve 210 presses the outer walls of the two shielding rings 220 so that the shielding rings 220 press against the shielding layer 440 of the shielded cable 400 to be tested.

In this embodiment, the end of the inner conductor 420 of the shielded cable 400 to be tested away from the matching sample is connected to the signal generator, and the shielded tube 100 is connected to the signal receiver.

The utility model is a device and a method for quickly and conveniently connecting the inner conductor 420 and the shielding layer 440 of the shielded cable 400 to be tested. The device and method adopted by the utility model can greatly shorten the preparation time of samples, and improve the test accuracy and test repeatability.

The utility model can be used not only for electromagnetic compatibility performance testing, but also for other testing methods that need to match the shielding layer 440 of the shielded cable 400 with the inner conductor 420 . As one of the key technologies and innovations in the matching process of the inner conductor 420 and the shielding layer 440 in the electromagnetic compatibility test, it can solve the problem of long operation time for matching the inner conductor 420 and the shielding layer 440 in the traditional electromagnetic compatibility test, poor solder joint control, There are safety hazards and other issues. This utility model can greatly improve the success rate of the matching process between the inner conductor 420 and the shielding layer 440 during the electromagnetic compatibility test, and maintain the performance of the tested cable itself to the greatest extent, thereby controlling the influence of human factors on the tested core after testing to a minimum. minimum.

With the rapid development of new energy vehicles and power grid construction, and the consideration of safety performance in the process of information transmission, the demand for evaluating the shielding performance of shielded cable 400 continues to grow at home and abroad. In the related electromagnetic compatibility performance test, The rapid processing of matching the inner conductor 420 and the shielding layer 440 is currently blank in China.

To sum up, the utility model effectively overcomes various shortcomings in the prior art and has high industrial application value.

The above-mentioned embodiments only illustrate the principles and effects of the present utility model, but are not intended to limit the present utility model. Anyone familiar with this technology can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the utility model should still be covered by the claims of the utility model.

Claims (7)

1. A connection device for a sample between an inner conductor of a shielded cable and a shielding layer, characterized in that it comprises: shielding pipe (100); Along the axial direction of the shielding tube (100), an annular locking component (200) and an annular matching component (300) are sequentially installed on the inner wall of the shielding tube (100); The locking component (200) clamps the shielding layer (440) of the shielded cable (400) to be tested inserted into the shielding tube (100); A matching sample is welded on the matching component (300), and there is an axial gap between the matching component (300) and the shielded cable (400) to be tested; A thimble (500) is pierced through the matching component (300), and the thimble (500) is inserted into the inner conductor (420) of the shielded cable (400) to be tested; The shielding tube (100), the locking part (200), the matching part (300) and the thimble (500) are all conductors. 2. The connection device between the inner conductor and the shielding layer of the shielded cable according to claim 1, characterized in that: it also includes an insulating ring (600), and the insulating ring (600) is arranged on the matching part ( 300) and the shielded cable (400) to be tested in the axial gap, the insulating ring (600) is in contact with the shielded cable (400) to be tested in the shielded tube (100), and the The inner diameter of the insulating ring (600) is smaller than the diameter of the inner conductor (420) of the shielded cable (400) to be tested, and the outer diameter of the insulating ring (600) is larger than that of the shielded cable (400) to be tested. The diameter of the inner conductor (420). 3. The connection device between the inner conductor and the shielding layer of the shielded cable according to claim 2, characterized in that: the side of the matching component (300) close to the shielded cable (400) to be tested An annular groove (310) for inserting the insulating ring (600) is provided on the top. 4. The connection device between the inner conductor and the shielding layer of the shielded cable according to claim 3, characterized in that: the matching component (300) includes a top cover (320), a circuit plate (330) and base (340), the base (340) is connected with the inner wall of the shielding tube (100), the top cover (320) and the circuit board (330) are connected with the shielding tube (100) ) without contact, the matching sample is welded on the circuit board (330), and the thimble (500) passes through the top cover (320). 5. The connection device between the inner conductor and the shielding layer of the shielded cable according to claim 4, characterized in that: the top cover (320), the circuit board (330) and the base (340) are ring-shaped, the inner ring size of the circuit board (330) is smaller than the inner ring size of the base (340), and the body of the top cover (320) is provided with a An annular insertion part (321), the insertion part (321) passes through the circuit board (330), the outer ring surface of the insertion part (321), the circuit board (330) and the base (340) ) surrounds the annular groove (310). 6. The connection device between the inner conductor and the shielding layer of the shielded cable according to claim 1, characterized in that: the locking part (200) comprises: a locking sleeve (210) and two semicircular rings The shielding ring (220), the inner wall of one end of the locking sleeve (210) is tapered, the diameter of the outer wall of one end of each shielding ring (220) gradually decreases outwards, and the two The shielding ring (220) is sleeved on the shielding layer (440) of the shielded cable (400) to be tested, and the inner wall of the locking sleeve (210) is tapered and one end is sleeved on the two shielding rings ( 220) at the end where the diameter of the outer wall gradually decreases outwards, and the locking sleeve (210) is installed in the shielding tube (100). 7. The connection device between the inner conductor and the shielding layer of the shielded cable according to claim 6, characterized in that: one end of the shielding tube (100) is provided with a blocking portion (110), two of the The shielding ring (220) abuts against the blocking portion (110).