CN216560366U

CN216560366U - Cable breakage detection device and cable breakage detection system

Info

Publication number: CN216560366U
Application number: CN202122691996.3U
Authority: CN
Inventors: 罗千苟; 孙纯忠; 梁奕昆
Original assignee: Zhejiang Dahua Technology Co Ltd
Current assignee: Zhejiang Dahua Technology Co Ltd
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2022-05-17
Anticipated expiration: 2031-11-04

Abstract

The utility model relates to a cable damage detection device and a cable damage detection system, wherein the cable damage detection device comprises a container, a power supply and a Hall sensor; the container is filled with conductive liquid, and the liquid can submerge a part of the cable sliding in the container; two poles of the power supply are respectively connected with one end of the cable and the liquid in the container; a Hall sensor having a channel, the Hall sensor for detecting a change in current within a cable passing through the channel. In the cable breakage detection device, since the liquid has fluidity, the liquid can completely contact with the cable; and when the insulating layer of the cable is damaged and the damaged part is in contact with the conductive liquid, the power supply, the metal wire in the cable and the conductive liquid form a complete loop, current passes through the cable, the Hall sensor detects the current change in the cable passing through the channel, the damaged condition of the insulating layer of the cable is detected in a magnetic field real-time induction current mode, and the detection result is accurate.

Description

Cable breakage detection device and cable breakage detection system

Technical Field

The utility model relates to the technical field of power cables, in particular to a cable damage detection device and a cable damage detection system.

Background

The existing cable breakage detection device generally detects whether an insulating layer has a breakage phenomenon through a spark machine, the spark machine is composed of a large number of metal beads, and when the insulating layer of a cable is broken to cause an internal metal wire to be in contact with the metal beads, a spark can give an alarm.

However, since the diameter of the metal bead is large and the frequency of the spark machine test reaction is low, when the breakage diameter of the cable insulation layer is small, the breakage cannot be detected.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a cable damage detection device and a cable damage detection system, which are capable of accurately detecting a cable damage without causing a damage failure.

The utility model provides a cable breakage detection device, which comprises a container, a detection device and a detection device, wherein the container is filled with conductive liquid, and the liquid can submerge part of a cable sliding in the container; a power supply having two poles connected to one end of the cable and the liquid in the container, respectively; a Hall sensor having a channel, the Hall sensor for detecting a change in current within the cable passing through the channel.

In the cable damage detection device, the conductive liquid contained in the container is used as a sensing medium for testing, and the liquid has fluidity, so that the liquid can be completely contacted with the cable; and when the insulating layer of the cable is damaged and the damaged part is in contact with the conductive liquid, the power supply, the metal wire in the cable and the conductive liquid form a complete loop, ions in the conductive liquid move directionally, current passes through the cable, the Hall sensor detects the change of the current in the cable passing through the channel, the damaged condition of the insulating layer of the cable is detected in a magnetic field real-time current induction mode, and the detection result is accurate.

In one embodiment, the hall sensor comprises an annular magnetic core, and the channel is disposed on the annular magnetic core.

So set up, the annular magnetic core can make the magnetic field intensity of all directions in the passageway the same to when guaranteeing that the cable that passes through as electric current passes through the passageway, hall sensor can accurately detect electric current.

In one embodiment, the hall sensor includes a first lead connected to the positive electrode and a second lead immersed in the liquid.

So set up, power, first wire, hall sensor, second wire and liquid can constitute a complete return circuit, need not extra mains operated, reduce the number of required component among the damaged detection device of cable.

In one embodiment, the length of the container in the direction of cable transport is 3m to 4 m.

Due to the arrangement, the processing speed of the cable can reach 2000 m/min, the length of the container is not less than 3m, the cable can be ensured to be in full contact with liquid, the situation that the damaged part of the insulating layer of the cable is not in full contact with the liquid and leaves the container due to the fact that the length of the container is too short is avoided, and the accuracy of a test result is ensured; meanwhile, the length of the container is less than 4m, so that the overlarge integral volume of the cable damage detection device can be avoided.

In one embodiment, the liquid is industrial brine.

So arranged, the ionization of salt can increase the density of free charges in water, thereby increasing the conductivity of water.

In one embodiment, the cable breakage detection device further comprises an alarm device, and the alarm device is electrically connected with the hall sensor.

So set up, hall sensor detects the current change back in the cable, and control alarm device reports to the police, reminds the user to detect the insulating layer damage of cable.

In one embodiment, the alarm device is an alarm lamp or a buzzer.

The utility model also provides a cable damage detection system which comprises the cable, the cable driving mechanism and the cable damage detection device.

In one embodiment, the cable drive mechanism includes a cable pay-off device including a conductor connected to the power source, the cable having one end electrically connected to the conductor.

So set up, the conductor sets up in pay-off and is connected to the power, and the cable is in the one end of pay-off can be connected with the conductor electricity to make the cable can be connected to the power through the conductor.

In one embodiment, the extruder further comprises a take-up device and an air-drying device, the take-up device is used for drawing the cable to enable the cable to be conveyed to a preset direction, and the air-drying device is arranged between the cable damage detection device and the take-up device.

So set up, air-dry the device and can air-dry the cable after liquid, the cable is in dry state when guaranteeing the take-up, does benefit to the save of cable.

Drawings

FIG. 1 is a schematic structural diagram of a cable breakage detection system according to the present invention;

FIG. 2 is a first partial structural view of FIG. 1 according to the present invention;

FIG. 3 is a second schematic diagram of a portion of the structure of FIG. 1 according to the present invention;

FIG. 4 is an enlarged schematic view of the structure at A in FIG. 1 according to the present invention;

FIG. 5 is an enlarged schematic view of the structure at B in FIG. 1 according to the present invention;

fig. 6 is a schematic diagram of the connection of the container, the cable and the power supply provided by the present invention.

Description of the main elements

1. A container; 2. a Hall sensor; 21. a channel; 22. an annular magnetic core; 23. a first conductive line; 24. a second conductive line; 3. a cable; 4. a power source; 5. an alarm device; 6. a pay-off device; 61. a conductor; 7. a take-up device; 8. and (5) air-drying the device.

The present invention is described in further detail with reference to the drawings and the detailed description.

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 will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

In the related prior art, whether an insulating layer of a cable is damaged or not is usually detected through a spark machine, the spark machine is composed of a large number of metal beads with the diameter of 3-4 mm, and the method for detecting whether the insulating layer of the cable is damaged or not through the contact of the metal beads and the damaged part of the insulating layer of the cable, so that when the damaged diameter of the insulating layer of the cable is smaller than 1mm, the metal beads cannot contact with the damaged part of the insulating layer of the cable, and the damage cannot be detected.

In order to solve the above problems, as shown in fig. 1 to 6, the present invention provides a cable breakage detection device and a cable breakage detection system, in which a test sensitive medium of the cable breakage detection device is a liquid, and the liquid has fluidity, and therefore, the test sensitive medium can be completely in contact with a cable.

As shown in fig. 4 and 6, specifically, the cable breakage detection device includes a container 1, a power source 4, and a hall sensor 2; the container 1 contains conductive liquid, and the liquid can submerge a part of the cable 3 sliding in the container 1; two poles of the power supply 4 are respectively connected with one end of the cable 3 and the liquid in the container 1; the hall sensor 2 has a channel 21, and the hall sensor 2 is used to detect a change in current in the cable 3 passing through the channel 21.

In the cable detection device, two poles of the power source 4 are respectively connected to one end of the cable 3 and the conductive liquid in the container 1, the conductive liquid is used as a sensing medium for testing, and when the cable 3 passes through the container 1, the liquid in the container 1 can pass through part of the cable 3. When the insulating layer of the cable 3 is not damaged, the metal wire in the cable 3 is not in contact with the conductive liquid, no current passes through the cable 3, and the Hall sensor 2 cannot detect the current change in the cable 3; when the insulating layer of the cable 3 is damaged and the damaged part is in contact with the conductive liquid, the power supply 4, the metal wire in the cable 3 and the conductive liquid form a complete loop, ions in the conductive liquid move directionally, current passes through the cable 3, the Hall sensor 2 detects the current change in the cable 3 passing through the channel 21, the damaged condition of the insulating layer of the cable is detected in a magnetic field real-time current induction mode, and the detection result is accurate.

As described above, in the related art, when the insulation layer of the cable is damaged or not is detected by the sparking device, since the sparking device is composed of a large number of metal beads with diameters of 3-4 mm, when the damaged diameter of the insulation layer of the cable 3 is smaller than 1mm, the metal beads cannot contact with the damaged portion of the insulation layer of the cable 3, so that the damage cannot be detected, and the detection result is affected. In the cable breakage detection device provided by the present invention, since the liquid has fluidity, the liquid can completely contact the cable 3 regardless of the diameter of the cable 3 and the diameter of the breakage of the insulating layer of the cable 3, and the breakage cannot be detected due to the excessively small diameter of the cable 3 or the excessively small diameter of the breakage of the insulating layer of the cable 3.

In addition, in the related prior art, after the cable passes through the metal beads for a long time, a structural shaping cavity is easily formed between the metal beads, and the cable with a smaller diameter can directly pass through the cavity without contacting with the metal beads, so that the test failure is caused, and the detection result is influenced. In the cable damage detection device provided by the utility model, the liquid has fluidity, so that the liquid can not form a shaped cavity after long-term operation, and the accuracy of a test result can be ensured.

Since the spark machine is a high-voltage working device, frequent maintenance and repair are required to ensure the safety and efficiency of the test, and the cost of the spark machine is high, the cost of the inspection of the cable 3 is high in the related art. The cable damage detection device provided by the utility model adopts the Hall sensor 2 to detect the cable 3 in an electromagnetic induction mode, so that the voltage and the current are low, the safety of a user is guaranteed, and the cost can be reduced.

As shown in fig. 4, in an embodiment, the hall sensor 2 includes an annular magnetic core 22, the channel 21 is disposed on the annular magnetic core 22, and the annular magnetic core 22 can make the magnetic field intensity in all directions in the channel 21 the same, so as to ensure that the hall sensor 2 can accurately detect the current when the cable 3 through which the current passes through the channel 21. In other embodiments, the magnetic core of the hall sensor 2 may have an unclosed annular structure or other shapes such as a rectangle, as long as the magnetic core has a passage 21 for the cable 3 to pass through.

As shown in fig. 1 to 3, the container 1 may be a water tank, or may be another container such as a water tank, and the length of the water tank is 3 to 4m in the transport direction of the cable 3. In the related art, since the testing reaction frequency of the spark machine is low, usually 10Hz, and the processing speed of the cable 3 is fast, which can reach 2000 m/min, the problem that the insulation layer of the cable 3 is damaged continuously in a short distance cannot be detected. In the cable damage detection device provided by the utility model, the damage condition of the insulating layer of the cable 3 is detected in a magnetic field real-time induction current mode, the test frequency is about 60Hz to 400Hz, the length of the water tank is not less than 3m in order to ensure that the cable 3 has sufficient time to be contacted with liquid, the phenomenon that the damaged part of the insulating layer of the cable 3 leaves the water tank without fully contacting with the liquid due to the over-short length of the water tank is prevented, the cable 3 can be accurately detected when the insulating layer is continuously damaged in a short distance, and the detection result is more accurate; meanwhile, the length of the water tank is smaller than 4m, and the cable damage detection device is prevented from being overlarge in size.

In one embodiment, the liquid is industrial brine and salt ionization can increase the density of free charges in the water, thereby increasing the conductivity of the water. Of course, in other embodiments, other elements that increase the conductivity of water may be added to the water.

As shown in fig. 4 and 6, the hall sensor 2 is spaced apart from the water tank, the hall sensor 2 includes a first lead 23 and a second lead 24, the first lead 23 is connected to the power source 4, and the second lead 24 is immersed in the liquid. The cable breakage detection device further comprises an alarm device 5, and after the Hall sensor 2 detects the current change in the cable 3, the alarm device 5 is controlled to give an alarm to remind a user of detecting the breakage of the insulating layer of the cable. Because one pole of the power supply is connected in the conductive liquid, the second lead 24 is immersed in the liquid of the container 1, and the first lead 23 is connected to the other pole of the power supply, so that the power supply 4, the first lead 23, the Hall sensor 2, the second lead 24 and the liquid can form a complete loop, no additional power supply is needed, and the number of elements needed in the cable breakage detection device is reduced.

In one embodiment, the alarm device 5 is an alarm lamp or buzzer; in another embodiment, the alarm device 5 is a device that is used in combination with a warning light and a buzzer. Of course, in other embodiments, the alarm device 5 may be another device having an alarm function, as long as it can remind the user that the insulation layer of the cable is damaged.

As shown in fig. 1 to 3 and fig. 6, the present invention further provides a cable damage detection system, which includes a cable, a cable driving mechanism, an air drying device 8, and the cable damage detection device, wherein the cable driving mechanism includes a wire releasing device 6 and a wire collecting device 7. The two poles of the power supply 4 are respectively connected with the conductor 61 and the conductive liquid in the container 1, so that the conductor 61 is charged with positive electricity or negative electricity, the conductor 61 is arranged at the center of the winding roller, one end of the cable 3, which is positioned at the pay-off device, can be electrically connected with the conductor 61, and the cable 3 can be charged with positive electricity or negative electricity; meanwhile, the first lead 23 is also electrically connected with the conductor 61 and is matched with the second lead 24 extending into the conductive liquid to supply power to the hall sensor 2, and an additional power supply is not required to be arranged for supplying power. Pay-off 6 and take-up 7 set up respectively in the both ends of extruder, pay-off 6 and 7 synchronous working of take-up, take-up 7 is used for drawing cable 3 to make cable 3 can be from pay-off 6 to the conveying of take-up 7, air-dry device 8 sets up between cable damage detection device and take-up 7, the conducting liquid of splendid attire in the basin is when as induction medium, can also cool off the insulating layer of cable 3, air-dry device 8 can air-dry cable 3 after liquid, cable 3 is in dry state when guaranteeing take-up 7 to receive the line, do benefit to the saving of cable 3.

In the related art, the water tank only plays a cooling role, the air drying device 8 is usually arranged adjacent to the water tank, the spark machine is arranged on one side of the air drying device 8 relatively far away from the water tank, and after the cable 3 is cooled by the water tank, the cable needs to be dried by the air drying device 8 firstly and then passes through the spark machine to detect the damage condition of the cable insulation layer; in the extruder provided by the utility model, the Hall sensor 2 is arranged adjacent to the water tank, the air drying device 8 is arranged on one side of the Hall sensor 2 relatively far away from the water tank, the cable 3 firstly passes through the Hall sensor 2 after passing through the water tank and then is dried through the air drying device 8, and the Hall sensor 2 is arranged adjacent to the water tank, so that when the cable 3 with a damaged insulating layer is in contact with negatively charged liquid to be charged with current, the Hall sensor 2 can immediately detect the current, and the detection efficiency is improved.

As shown in fig. 1, in one embodiment, the extruder is sequentially provided with a pay-off device 6, a preheating device, a traction device, a colloidal particle melting device, an extrusion master controller, a cooling water tank, a wire diameter measuring device, a container 1, a hall sensor 2, an alarm device 5, an air drying device 8, a tension releasing device and a take-up device 7 according to the working sequence of the extruder, and after the cooling water tank cools the cable 3, the liquid in the container 1 can cool the cable 3 for the second time so as to fully cool the cable.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims

1. A cable breakage detection device, comprising:

a container (1) containing an electrically conductive liquid, said liquid being able to submerge a portion of the cable (3) sliding within said container (1);

a power supply (4), wherein two poles of the power supply (4) are respectively connected with one end of the cable (3) and the liquid in the container (1);

a Hall sensor (2) having a channel (21), the Hall sensor (2) being adapted to detect a change in current within the cable (3) passing through the channel (21).

2. Cable breakage detection device according to claim 1, wherein the hall sensor (2) comprises an annular magnetic core (22), the channel (21) being provided on the annular magnetic core (22).

3. Cable breakage detection device according to claim 1, wherein the hall sensor (2) further comprises a first wire (23) and a second wire (24), the first wire (23) being connected to the power source (4), the second wire (24) being immersed in the liquid.

4. Cable breakage detection device according to claim 1, wherein the length of the container (1) in the direction of transport of the cable (3) is 3 to 4 m.

5. The cable breakage detection apparatus of claim 1 wherein the liquid is industrial brine.

6. Cable breakage detection device according to claim 1, characterized in that it further comprises an alarm device (5), said alarm device (5) being electrically connected to said hall sensor (2).

7. Cable breakage detection device according to claim 6, characterized in that the alarm device (5) is an alarm lamp or a buzzer.

8. A cable breakage detection system comprising a cable (3) and a cable drive mechanism, and a cable breakage detection device according to any one of claims 1 to 7.

9. Cable breakage detection system according to claim 8, wherein the cable drive mechanism comprises a pay-off device (6), the pay-off device (6) comprising a conductor (61) connected to the power source (4), one end of the cable (3) being electrically connected to the conductor (61).

10. The cable breakage detection system of claim 8, further comprising a take-up device (7) and an air drying device (8), wherein the take-up device (7) is configured to pull the cable (3) to be conveyed in a predetermined direction, and the air drying device (8) is disposed between the cable breakage detection device and the take-up device (7).