CN217007552U - High-resistance breakdown instrument for cable - Google Patents
High-resistance breakdown instrument for cable Download PDFInfo
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- CN217007552U CN217007552U CN202220547902.7U CN202220547902U CN217007552U CN 217007552 U CN217007552 U CN 217007552U CN 202220547902 U CN202220547902 U CN 202220547902U CN 217007552 U CN217007552 U CN 217007552U
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Abstract
The utility model discloses a high-resistance cable breakdown instrument, belongs to the field of power cable detection, and aims to solve the problem that a detection line and a cable phase line of the existing high-resistance cable breakdown instrument are inconvenient to manually connect. The utility model comprises a detection box, a box cover, a detection circuit and a wiring unit; a detection circuit is arranged in the detection box, a detection switch of the detection circuit is arranged on the upper surface of the detection box, and a detection terminal of the detection circuit is led out from the upper surface of the detection box and is connected with the wiring unit; the wiring unit includes insulating connection terminal, fixed lid, joint lid and conducting strip, insulating connection terminal upper surface is provided with two bar grooves side by side, bottom at every bar groove is provided with the conducting strip, and it is fixed with two sets of most advanced multi-contact metal sawtooth upwards, there is the space and realizes the electricity through the conducting strip between every bar groove's the detection line terminal and the detection cable line that waits to be connected, fixed lid is used for compressing tightly the detection line terminal in the one end of conducting strip, the joint lid is used for waiting to detect the cable line and compresses tightly the other end at the conducting strip.
Description
Technical Field
The utility model relates to breakdown equipment for a power cable in a high-resistance state fault, and belongs to the field of power cable detection.
Background
When the power cable with the voltage of more than 10kV is subjected to daily operation, maintenance and overhaul, a cable work area can process some complex cable faults, wherein the cable high resistance problem is one of the faults which cause the trouble of workers.
The high resistance phenomenon of the cable is mostly that the damaged part of the cable is not completely broken down, so that the cable can not reach the putting standard, meanwhile, the resistance value of the cable does not support the finding of the cable fault, and the cable can not pass through the cable test in the high resistance state. Therefore, solving the problem of high resistance of the cable is an urgent problem to be solved.
When the existing high-resistance cable breakdown instrument is used, a detection line of an instrument port and a phase line to be detected of a cable need to be manually lapped or twisted together, poor contact exists in a lapping mode, so that the detection result is inaccurate, and if two lines are manually twisted together, the operation is inconvenient due to the fact that the diameter of the cable is too thick.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high-resistance cable breakdown instrument, aiming at the problem that a detection line of the existing high-resistance cable breakdown instrument is inconvenient to manually connect with a cable phase line.
The utility model relates to a high-resistance breakdown instrument for a cable, which comprises a detection box 1, a box cover 2, a detection circuit and a wiring unit 5;
a detection circuit is arranged in the detection box 1, detection switches K1 and K2 of the detection circuit are arranged on the upper surface of the detection box 1, and a detection terminal A, B of the detection circuit is led out from the upper surface of the detection box 1 and is connected with the wiring unit 5; the box cover 2 is buckled on the upper surface of the detection box 1;
the wiring unit 5 comprises an insulating wiring seat 501, a fixing cover 502, a clamping cover 503 and a conducting strip 505, wherein two strip-shaped grooves 504 are arranged on the upper surface of the insulating wiring seat 501 in parallel, the conducting strip 505 is arranged at the bottom of each strip-shaped groove 504 and fixed by two groups of multi-contact metal saw teeth 506 with upward tips, a detection wire terminal and a cable wire to be detected are placed in each strip-shaped groove 504 at the same time, a gap exists between the detection wire terminal located in the same strip-shaped groove 504 and the cable wire to be detected and electric connection is achieved through the conducting strip 505, the fixing cover 502 is used for pressing the detection wire terminal on one end of the conducting strip 505 and enabling the multi-contact metal saw teeth 506 to penetrate into the detection wire terminal, and the clamping cover 503 is used for pressing the cable wire to be detected on the other end of the conducting strip 505 and enabling the multi-contact metal saw teeth 506 to penetrate into the cable wire to be detected.
Preferably, the detection circuit comprises an autotransformer T, a high-voltage diode D, a resistor R, a capacitor C, a detection switch K1 and a detection switch K2, wherein a primary coil of the autotransformer T is connected with a 220V alternating-current power supply, one end of a secondary coil of the autotransformer T is connected with an anode of the high-voltage diode D, a cathode of the high-voltage diode D is connected with one end of the resistor R, the other end of the resistor R is connected with one end of the detection switch K1, and the other end of the detection switch K1 is simultaneously connected with one end of the detection switch K2 and one end of the capacitor C;
the other end of the detection switch K2 is connected with a detection terminal A;
the other end of the capacitor C is simultaneously connected with the other end of the secondary coil of the autotransformer T and the detection terminal B;
and the detection terminal A and the detection terminal B are respectively used for connecting a phase line or a ground line of the cable.
Preferably, the clamping cover 503 comprises a top cover 503-1, a side 503-2, a buckle 503-3, a spring 503-4 and an arc pressing piece 503-5, the top cover 503-1 and the two sides 503-2 are elastically connected to form a U-shaped cover body, the lower surface of the top cover 503-1 is connected with the arc pressing piece 503-5 through the spring 503-4 at the corresponding position of the two strip-shaped grooves 504, the buckle 503-3 is arranged on the inner side wall of the side 503-2, and the clamping groove 501-1 is correspondingly arranged on the outer side wall of the insulated wire holder 501; the top cover 503-1 is buckled on the insulated wire holder 501 through the matching of the buckle 503-3 and the clamping groove 501-1, and the top cover 503-1 presses the phase line or the ground line of the cable through the spring 503-4 and the arc pressing piece 503-5.
Preferably, two sets of screws 507 are further included, said screws 507 passing from the outside through the fixed cover 502 and pressing against the detection terminal A, B.
Preferably, the detection device further comprises elastic clamping pieces 508, and one elastic clamping piece 508 is arranged in each strip-shaped groove 504 and used for clamping the detection terminal or the cable to be detected.
Preferably, a protective sleeve 4 is further included, and a portion of the detection terminal between the detection box 1 and the wiring unit 5 is disposed inside the protective sleeve 4.
The utility model has the beneficial effects that: the high-resistance breakdown instrument for the cable is simple in wiring, a phase wire and a ground wire of the cable, which are possible to have high-resistance faults, are respectively arranged in the two strip-shaped grooves of the wiring unit, the side edge of the clamping cover is pulled to be buckled on the insulating wiring seat, in the process, the clamping cover transmits pressure through the spring, the phase wire and the ground wire of the cable are pressed tightly through the arc pressing piece, the multi-contact metal sawtooth with the upward tip end penetrates into the wire, the fixing effect is good, and stable electric connection of the cable and the detection terminal is realized. The utility model has simple wiring operation and stable connection.
Drawings
FIG. 1 is a schematic structural diagram of a high resistance breakdown instrument for a cable according to the present invention;
FIG. 2 is a circuit schematic of the detection circuit;
FIG. 3 is a schematic structural view of a wiring unit;
FIG. 4 is a top view of the wiring block with the mounting and clamping covers removed;
FIG. 5 is a left side view of FIG. 3;
fig. 6 is a right side view of fig. 3.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The utility model is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
The first embodiment is as follows: the following describes the present embodiment with reference to fig. 1 to 6, and the cable high resistance breakdown instrument of the present embodiment includes a detection box 1, a box cover 2, a detection circuit and a wiring unit 5;
a detection circuit is arranged in the detection box 1, detection switches K1 and K2 of the detection circuit are arranged on the upper surface of the detection box 1, and a detection terminal A, B of the detection circuit is led out from the upper surface of the detection box 1 and is connected with the wiring unit 5; the box cover 2 is buckled on the upper surface of the detection box 1;
the wiring unit 5 comprises an insulating wiring base 501, a fixing cover 502, a clamping cover 503 and conducting strips 505, wherein two strip-shaped grooves 504 are arranged on the upper surface of the insulating wiring base 501 in parallel, the conducting strips 505 are arranged at the bottoms of the strip-shaped grooves 504 and are fixed by two groups of multi-contact metal saw teeth 506 with upward tips, a detection wire terminal and a cable wire to be detected are placed in each strip-shaped groove 504 at the same time, gaps exist between the detection wire terminal and the cable wire to be detected which are positioned in the same strip-shaped groove 504, electric connection is achieved through the conducting strips 505, the fixing cover 502 is used for pressing the detection wire terminal onto one end of the conducting strips 505 and enabling the multi-contact metal saw teeth 506 to pierce the detection wire terminal, and the clamping cover 503 is used for pressing the cable wire to be detected onto the other end of the conducting strips 505 and enabling the multi-contact metal saw teeth 506 to pierce the cable wire to be detected.
The detection circuit comprises an autotransformer T, a high-voltage diode D, a resistor R, a capacitor C, a detection switch K1 and a detection switch K2, wherein a primary coil of the autotransformer T is connected with a 220V alternating-current power supply, one end of a secondary coil of the autotransformer T is connected with an anode of the high-voltage diode D, a cathode of the high-voltage diode D is connected with one end of the resistor R, the other end of the resistor R is connected with one end of a detection switch K1, and the other end of the detection switch K1 is simultaneously connected with one end of a detection switch K2 and one end of the capacitor C;
the other end of the detection switch K2 is connected with a detection terminal A;
the other end of the capacitor C is simultaneously connected with the other end of the secondary coil of the autotransformer T and the detection terminal B;
and the detection terminal A and the detection terminal B are respectively used for connecting a phase line or a ground line of the cable.
The autotransformer T is a test transformer with the range of 0-50kV, the transformation ratio of 1:200 and the capacity of 5kVA, the high-voltage diode D is a 2DL-75/0.15 high-voltage diode, and the capacitor C is a 2 muF capacitor.
And (3) detection process: the detection switch K1 is closed and boosted by the autotransformer T, and the resulting ac power is converted to dc power by the high voltage diode D, which then charges the capacitor C. After the capacitor C is full, K1 is opened, and a detection switch K2 is closed, so that the capacitor C discharges the cable to be detected. The connection mode is two, one is to connect the point A to the high resistance phase and the point B to the working ground; the other is to connect A, B point on two high resistance phases.
The clamping cover 503 comprises a top cover 503-1, a side 503-2, a buckle 503-3, a spring 503-4 and an arc pressing piece 503-5, the top cover 503-1 and the two side 503-2 are elastically connected to form a U-shaped cover body, the lower surface of the top cover 503-1 is connected with the arc pressing piece 503-5 through the spring 503-4 at the corresponding position of the two strip-shaped grooves 504, the buckle 503-3 is arranged on the inner side wall of the side 503-2, and a clamping groove 501-1 is correspondingly arranged on the outer side wall of the insulating wire holder 501; the top cover 503-1 is buckled on the insulated wire holder 501 through the matching of the buckle 503-3 and the clamping groove 501-1, and the top cover 503-1 presses the phase line or the ground line of the cable through the spring 503-4 and the arc pressing piece 503-5.
The wiring process: two phase lines or a phase line plus a ground line of the cable are respectively arranged in two strip-shaped grooves 504 of the wiring unit, because the top cover 503-1 is elastically connected with two side edges 503-2, the side edges 503-2 of the clamping cover 503 are pulled to enable the two side edges 503-2 to be outward, a working space is provided for the buckle 503-3 and the clamping groove 501-1, in the process that the clamping cover 503 is pressed downwards, pressure is transmitted through the spring 503-4, the phase line or the ground line of the cable is pressed tightly through the arc-shaped pressing piece 503-5, the multi-contact metal saw teeth 506 with the upward tips penetrate into the cable, the wiring action is easy to complete, the wiring is stable, and one conducting strip 505 completes the connection of the detection terminal A, B and the phase line or the ground line of the cable through two groups of the multi-contact metal saw teeth 506.
The second embodiment is as follows: in this embodiment, further describing the first embodiment, the present invention further includes two sets of screws 507, and the screws 507 penetrate the fixing cover 502 from the outside and press against the detection terminal A, B.
The fixing cover (502) is fixedly arranged on the insulating wire holder (501), and the two groups of screws 507 are further added in the embodiment to strengthen the electric connection and physical connection relation between the detection terminal A, B and the conducting sheet 505.
The third concrete implementation mode: in this embodiment, further description is made on the first embodiment, the first embodiment further includes an elastic clip 508, and one elastic clip 508 is disposed in each strip-shaped groove 504, and is used for clamping a detection terminal or a cable to be detected.
The fourth concrete implementation mode is as follows: in the first embodiment, the present embodiment further includes a protective sleeve 4, and a portion of the detection terminal located between the detection box 1 and the wiring unit 5 is provided in the protective sleeve 4.
Although the utility model herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (6)
1. The cable high-resistance breakdown instrument is characterized by comprising a detection box (1), a box cover (2), a detection circuit and a wiring unit (5);
a detection circuit is arranged in the detection box (1), detection switches K1 and K2 of the detection circuit are arranged on the upper surface of the detection box (1), and a detection terminal A, B of the detection circuit is led out from the upper surface of the detection box (1) and is connected with a wiring unit (5); the box cover (2) is buckled on the upper surface of the detection box (1);
the wiring unit (5) comprises an insulated wiring seat (501), a fixed cover (502), a clamping cover (503) and a conducting strip (505), two strip-shaped grooves (504) are arranged on the upper surface of the insulated wiring seat (501) in parallel, a conducting strip (505) is arranged at the bottom of each strip-shaped groove (504) and fixed by two groups of multi-contact metal saw teeth (506) with upward tips, a detection line terminal and a cable to be detected are simultaneously placed in each strip-shaped groove (504), a gap is formed between the detection line terminal positioned in the same strip-shaped groove (504) and the cable to be detected and the electrical connection is realized through the conducting strip (505), the fixed cover (502) is used for pressing the test wire terminal on one end of the conducting strip (505) and enabling the multi-contact metal saw teeth (506) to penetrate into the test wire terminal, the clamping cover (503) is used for pressing the cable to be detected on the other end of the conducting strip (505) and enabling the multi-contact metal saw teeth (506) to penetrate into the cable to be detected.
2. The cable high resistance breakdown instrument according to claim 1, wherein the detection circuit comprises an autotransformer T, a high voltage diode D, a resistor R, a capacitor C, a detection switch K1 and a detection switch K2, a primary coil of the autotransformer T is connected with a 220V alternating current power supply, one end of a secondary coil of the autotransformer T is connected with an anode of the high voltage diode D, a cathode of the high voltage diode D is connected with one end of the resistor R, the other end of the resistor R is connected with one end of the detection switch K1, and the other end of the detection switch K1 is simultaneously connected with one end of the detection switch K2 and one end of the capacitor C;
the other end of the detection switch K2 is connected with a detection terminal A;
the other end of the capacitor C is simultaneously connected with the other end of the secondary coil of the autotransformer T and the detection terminal B;
and the detection terminal A and the detection terminal B are respectively used for connecting a phase line or a ground line of the cable.
3. The cable high resistance breakdown instrument according to claim 2, wherein the clamping cover (503) comprises a top cover (503-1), side edges (503-2), a buckle (503-3), a spring (503-4) and an arc-shaped pressing piece (503-5), the top cover (503-1) and the two side edges (503-2) are elastically connected to form a U-shaped cover body, the lower surface of the top cover (503-1) is connected with the arc-shaped pressing piece (503-5) through the spring (503-4) at the corresponding position of the two strip-shaped grooves (504), the buckle (503-3) is arranged on the inner side wall of each side edge (503-2), and the clamping groove 501-1 is correspondingly arranged on the outer side wall of the insulating wire holder (501); the top cover (503-1) is buckled on the insulated wire holder (501) through the matching of the buckle (503-3) and the clamping groove (501-1), and the top cover (503-1) compresses a phase line or a ground line of the cable through the spring (503-4) and the arc-shaped pressing piece (503-5).
4. The cable high resistance breakdown instrument according to claim 1, further comprising two sets of screws (507), wherein the screws (507) penetrate through the fixing cover (502) from the outside and press against the detection terminal A, B.
5. The cable high resistance breakdown instrument according to claim 1, further comprising elastic clamping pieces (508), wherein one elastic clamping piece (508) is arranged in each strip-shaped groove (504) and is used for clamping a detection terminal or a cable to be detected.
6. The cable high resistance breakdown instrument according to claim 1, further comprising a protective sleeve (4), wherein the part of the detection terminal between the detection box (1) and the wiring unit (5) is arranged in the protective sleeve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220547902.7U CN217007552U (en) | 2022-03-14 | 2022-03-14 | High-resistance breakdown instrument for cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220547902.7U CN217007552U (en) | 2022-03-14 | 2022-03-14 | High-resistance breakdown instrument for cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217007552U true CN217007552U (en) | 2022-07-19 |
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ID=82368546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220547902.7U Active CN217007552U (en) | 2022-03-14 | 2022-03-14 | High-resistance breakdown instrument for cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217007552U (en) |
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2022
- 2022-03-14 CN CN202220547902.7U patent/CN217007552U/en active Active
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