CN115312249A - Leakage detection device for cable cooling device - Google Patents

Abstract

The invention relates to a leakage detection device of a cable cooling device, which comprises a cable core, wherein an isolation layer, an inner protection layer, a reinforcing layer and an outer protection layer are sequentially arranged outside the cable core; the insulated wire cores are twisted together to form a cable core; the cabling core comprises a power cable, a ground wire and a control cable; two ends of the cable are respectively provided with a sealing cover; the sealing cover is an elastic sealing cover; the sealing cover is sleeved on the outer surface of the cable; winding an elastic sealing film on the surface of the cabling wire core; the surface of the elastic sealing film is provided with a leakage detection device. According to the leakage detection device for the cable cooling device, the elastic sealing film which is wrapped on the surface of the cable core after the cooling liquid leaks expands outwards along the radial direction under the pressure of the cooling liquid, the leakage detection device arranged on the surface of the sealing film is stretched to deform, the movable contact is contacted with the normally open fixed contact, the circuit is conducted, and the trigger signal is transmitted to the alarm through the lead to give an alarm.

Description

Leakage detection device for cable cooling device

Technical Field

The invention relates to a cable, in particular to a leakage detection device of a cable cooling device.

Background

At present, the development of electric vehicles is more and more rapid, and people hope that the charging speed of the electric vehicles is as fast as possible. In order to increase the charging speed, the current-carrying capacity of the cable per unit time needs to be increased under the condition that the charging voltage level is not changed.

In a traditional high-power cable, the cable structure comprises a conductor, an isolation layer, an insulation layer and a sheath layer, and the nominal sectional area of the conductor of the cable can only be increased when the current-carrying capacity of the cable needs to be increased due to the limitation of the performance of insulation and sheath materials. After the nominal sectional area of the cable is increased, the cost of the cable is increased, the weight of the cable is increased, and the cable is dragged with great effort when the traditional high-power cable is used for charging; most of the charging piles are distributed outdoors, the outdoor temperature in winter in northern areas of China is very low, so that the cable is required to have good low-temperature resistance, and the surface of the cable can reach very high temperature when the traditional high-power cable works, so that the material of the cable is required to have high-temperature resistance and low-temperature resistance.

During use, the cable is inevitably subjected to pulling, rolling, bending, twisting and the like, which in turn requires the material of the cable to have high mechanical properties. In order to avoid fire, etc., the resistor is required to have flame retardant property. At present, no material capable of meeting the performances simultaneously exists, so that the traditional high-power cable needs to be replaced after being used for a period of time, and the use cost and the maintenance cost are increased.

High-power cable is at the during operation, the cable surface can reach very high temperature again, set up the cooling tube usually in the cable inside in order to reduce cable surface temperature, the cooling liquid through the flow in the cooling tube is cooled down to the cable, receive in the cable use and draw to drag, roll, buckle, twist reverse and probably cause the cooling tube damage to cause the coolant liquid to leak, the coolant liquid flows from the cable both ends and causes power supply unit short circuit, polluted environment, there is very big potential safety hazard to staff's personal safety.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the leakage detection device for the cable cooling device, which has a simple structure, prevents the leakage of cooling liquid, and prevents the short circuit of power supply equipment and the environmental pollution caused by the outflow of the cooling liquid from the two ends of the cable.

The technical scheme adopted by the invention is as follows:

a leakage detection device for a cable cooling device comprises a cabling core, wherein an isolation layer, an inner protection layer, a reinforcement layer and an outer protection layer are sequentially arranged outside the cabling core; the insulated wire cores are twisted together to form a cable core;

the cabling core comprises a power cable, a ground wire and a control cable;

the power cable comprises a power cable conductor and a power cable insulating layer arranged outside the power cable conductor, wherein a cooling pipe is arranged outside the power cable insulating layer, and the cooling pipe is spirally wound on the surface of the power cable insulating layer; cooling liquid is arranged in the cooling pipe; the outer surface of the cooling pipe is extruded with an insulating shielding layer;

two ends of the cable are respectively provided with a sealing cover; the sealing cover is an elastic sealing cover;

the sealing cover comprises a shell, and the shell is sleeved on the outer surface of the cable;

the middle part of the sealing cover is provided with a through hole for penetrating through the power cable, the ground wire and the control cable;

an inner sealing core extending inwards from the inner surface of the end face of the shell is arranged on the inner side of the through hole;

an outer sealing core extending inwards from the inner surface of the end face of the shell is arranged outside the through hole;

the inner side sealing core and the outer side sealing core are used for sealing a middle triangular gap formed by the power cable, the ground wire and the control cable at two ends of the cable;

winding an elastic sealing film on the surface of the cabling wire core;

a closed cavity is formed between the elastic sealing film and the outer isolating layer;

the inner surface of the outer isolation layer is provided with a leakage detection device;

the leakage detection device comprises a leakage detection device shell, a telescopic cavity is arranged in the middle of the leakage detection device shell, a fixed normally open contact is arranged on the upper surface of the bottom of the telescopic cavity, and a movable contact is arranged on the lower surface of the top of the telescopic cavity;

the fixed contact is connected with an alarm arranged outside the cable through a lead.

And a water-absorbing expansion material is filled in a gap between the cabling core and the elastic sealing film.

The water-swellable material is acrylonitrile or acrylate.

The leakage detection device shell is an elastic shell.

At least three closed cavities are formed; the leakage detection devices in different closed cavities are arranged in a staggered mode along the length direction of the cable; only one leakage detection device is arranged on one cross section of the cable; the leakage detection devices in the same closed cavity are uniformly arranged along the length direction of the cable.

A leakage detection device for a cable cooling device comprises a cabling core, wherein an isolation layer, an inner protection layer, a reinforcement layer and an outer protection layer are sequentially arranged outside the cabling core; the insulated wire cores are twisted together to form a cable core;

the cabling core comprises a power cable, a ground wire and a control cable;

the power cable comprises a power cable conductor and a power cable insulating layer arranged outside the power cable conductor, wherein a cooling pipe is arranged outside the power cable insulating layer, and the cooling pipe is spirally wound on the surface of the power cable insulating layer; cooling liquid is arranged in the cooling pipe; the outer surface of the cooling pipe is extruded with an insulating shielding layer;

two ends of the cable are respectively provided with a sealing cover; the sealing cover is an elastic sealing cover;

the sealing cover comprises a shell, and the shell is sleeved on the outer surface of the cable;

the middle part of the sealing cover is provided with a through hole for penetrating through the power cable, the ground wire and the control cable;

an inner sealing core extending inwards from the inner surface of the end face of the shell is arranged on the inner side of the through hole;

an outer sealing core extending inwards from the inner surface of the end face of the shell is arranged outside the through hole;

the inner side sealing core and the outer side sealing core are used for sealing a middle triangular gap formed by the power cable, the ground wire and the control cable at two ends of the cable;

winding an elastic sealing film on the surface of the cabling wire core;

a closed cavity is formed between the elastic sealing film and the outer isolating layer;

the inner surface of the outer isolation layer is provided with a leakage detection device;

the leakage detection device is a strain gauge pressure sensor which is connected with the detector through a lead; the lead wire connected with the detector penetrates through the sealing cover.

A leakage detection device for a cable cooling device comprises a cabling core, wherein an isolation layer, an inner protection layer, a reinforcing layer and an outer protection layer are sequentially arranged outside the cabling core; the insulated wire cores are twisted together to form a cable core;

the cabling wire core comprises a power cable, a ground wire and a control cable;

the power cable comprises a power cable conductor and a power cable insulating layer arranged outside the power cable conductor, wherein a cooling pipe is arranged outside the power cable insulating layer, and the cooling pipe is spirally wound on the surface of the power cable insulating layer; cooling liquid is arranged in the cooling pipe; the outer surface of the cooling pipe is extruded with an insulating shielding layer;

two ends of the cable are respectively provided with a sealing cover; the sealing cover is an elastic sealing cover;

the sealing cover comprises a shell, and the shell is sleeved on the outer surface of the cable;

the middle part of the sealing cover is provided with a through hole for penetrating through the power cable, the ground wire and the control cable;

an inner sealing core extending inwards from the inner surface of the end face of the shell is arranged inside the through hole;

an outer sealing core extending inwards from the inner surface of the end face of the shell is arranged outside the through hole;

the inner side sealing core and the outer side sealing core are used for sealing a middle triangular gap formed by the power cable, the ground wire and the control cable at two ends of the cable;

winding an elastic sealing film on the surface of the cabling wire core;

a closed cavity is formed between the elastic sealing film and the outer isolating layer;

the inner surface of the outer isolation layer is provided with a leakage detection device;

the leakage detection device comprises an elastic supporting plate, the front end of the elastic supporting plate is provided with a supporting seat, and the supporting seat is provided with a through hole; the guide rod penetrates through the through hole; the outer side of the through hole is radially provided with a fixed contact, and the outer side of the fixed contact is provided with a movable contact; the movable contact is arranged at the front end of the guide rod; the rear end of the guide rod is connected with the rear end of the elastic support plate; the fixed contact is connected with an alarm outside the cable through a lead; the wire connected with the alarm penetrates through the sealing cover.

The guide arm is L-shaped and comprises a horizontal part and a vertical part, the horizontal part penetrates through the through hole, and the lower end of the vertical part is connected with the elastic supporting plate.

At least three closed cavities are formed; the leakage detection devices in different closed cavities are arranged in a staggered mode along the length direction of the cable; only one leakage detection device is arranged on one cross section of the cable; the leakage detection devices in the same closed cavity are uniformly arranged along the length direction of the cable; the leakage detection device is rectangular, and the axis of the guide rod is parallel or perpendicular to the axis of the cable.

Compared with the prior art, the invention has the beneficial effects that:

according to the leakage detection device for the cable cooling device, the elastic sealing film wrapped on the surface of the cable core is expanded outwards along the radial direction under the pressure of the cooling liquid, so that the shell of the leakage detection device is compressed, the shell of the leakage detection device is an elastic body and is deformed by compression, the movable contact is in contact with the normally open fixed contact, the circuit is conducted, and the trigger signal is transmitted to the alarm through the lead to give an alarm.

According to the leakage detection device for the cable cooling device, after the cooling liquid leaks, the cooling liquid is firstly absorbed by the water-absorbing expansion material arranged in the gap between the cable core and the elastic sealing film, the water-absorbing expansion material expands in volume, the elastic sealing film expands outwards along the radial direction under the extrusion of the water-absorbing expansion material, and then the shell of the leakage detection device is compressed, the shell of the leakage detection device is an elastic body and deforms under the compression, the movable contact is in contact with the normally-open fixed contact, the circuit is conducted, and the trigger signal is transmitted to the alarm through the lead to give an alarm.

According to the leakage detection device for the cable cooling device, the elastic sealing film which is wrapped on the surface of the cable core after the cooling liquid leaks expands outwards along the radial direction under the pressure of the cooling liquid, the leakage detection device arranged on the surface of the sealing film is a strain gauge pressure sensor, the strain gauge pressure sensor deforms, and signals are transmitted to the detector through the lead.

According to the leakage detection device for the cable cooling device, the elastic sealing film which is wrapped on the surface of the cable core after the cooling liquid leaks expands outwards along the radial direction under the pressure of the cooling liquid, the leakage detection device arranged on the surface of the sealing film is stretched to deform, the movable contact is contacted with the normally open fixed contact, the circuit is conducted, and the trigger signal is transmitted to the alarm through the lead to give an alarm.

According to the leakage detection device for the cable cooling device, the elastic sealing film which is wrapped on the surface of the cable core after the cooling liquid leaks expands outwards along the radial direction under the pressure of the cooling liquid, so that the shell of the leakage detection device is compressed, the shell of the leakage detection device is an elastic body and deforms under the compression, the movable contact is in contact with the normally open fixed contact, the circuit is conducted, and the trigger signal is transmitted to the alarm through the lead to give an alarm.

According to the leakage detection device for the cable cooling device, the sealing covers are arranged at the two ends of the cable, so that the situation that power supply equipment is short-circuited and pollutes the environment due to the fact that cooling liquid flows out of the two ends of the cable when a cooling pipeline leaks is prevented, the leakage detection device for the cooling liquid is arranged in the sealing covers, the leakage detection device for the cooling liquid can detect the situation that the cooling liquid does not flow out of the end parts of the cable, potential safety hazards can be found as early as possible, equipment damage is prevented, and personal safety of workers is guaranteed.

Drawings

FIG. 1 is a schematic structural view of a first embodiment of a leak testing apparatus for a cable cooling apparatus according to the present invention;

fig. 2 is a schematic view of a connection structure of a cooling pipe and a power cable conductor of the leakage detection device for a cable cooling device according to the present invention.

FIG. 3 is a schematic view of a leak detector of the cable cooling apparatus of the present invention;

FIG. 4 is a schematic structural view of a second embodiment of the leak detector of the cable cooling device of the present invention;

FIG. 5 is a schematic cross-sectional view of the sealing cap of the leak detector for cable cooling apparatus of the present invention;

FIG. 6 isbase:Sub>A schematic sectional view A-A of FIG. 5;

FIG. 7 is a schematic view of a cable and gland connection configuration of the present invention provided with a leak detection device;

FIG. 8 is a schematic structural view of a third embodiment of the leak detector of the cable cooling device of the present invention;

FIG. 9 is a schematic top view of a leak testing apparatus according to a fourth embodiment of the leak testing apparatus of the cable cooling apparatus of the present invention;

fig. 10 is a schematic front view of a leak detector according to a fourth embodiment of the leak detector of the cable cooling device of the present invention.

In the drawings, the main parts are illustrated by symbols:

in the figure:

1. power cable 2 and ground wire

3. Control cable 4, isolation layer

5. Inner protective layer 6, reinforced layer

7. Outer protective layer

11. Power cable conductor

12. Power cable insulation layer

13. Cooling pipe

14. Insulating shielding layer

31. Sealing cover

32. Through-hole

33. Inner side sealing core

34. Outside seal core

35. Leak detection device casing

36. Telescopic cavity

37. Fixed normally open contact

38. Movable contact

39. Conducting wire

40. A water swellable material.

Detailed Description

The invention is described in detail below with reference to the figures and examples:

as shown in fig. 1 to 10, in embodiment 1, the leakage detection device for the cable cooling device includes a cabling core, and an isolation layer 4, an inner protection layer 5, a reinforcement layer 6 and an outer protection layer 7 are sequentially disposed outside the cabling core; the insulated wire cores are twisted together to form a cable core;

the cabling core comprises a power cable 1, a ground wire 2 and a control cable 3;

the power cable 1 comprises a power cable conductor 11 and a power cable insulating layer 12 arranged outside the power cable conductor 11, wherein a cooling pipe 13 is arranged outside the power cable insulating layer 12, and the cooling pipe is spirally wound on the surface of the power cable insulating layer 12; cooling liquid is arranged in the cooling pipe; the outer surface of the cooling tube is extruded with an insulating shielding layer 14;

two ends of the cable are respectively provided with a sealing cover 31; the sealing cover is an elastic sealing cover;

the sealing cover comprises a shell, and the shell is sleeved on the outer surface of the cable;

the middle part of the sealing cover is provided with a through hole 32 for penetrating through the power cable 1, the ground wire 2 and the control cable 3;

an inner sealing core 33 extending inwards from the inner surface of the end surface of the shell is arranged inside the through hole;

an outer sealing core 34 extending inward from the inner surface of the end face of the housing is provided outside the through hole;

the inner side sealing core and the outer side sealing core are used for sealing a middle triangular gap formed by the power cable 1, the ground wire 2 and the control cable 3 at two ends of the cable;

winding, extruding or coating an elastic sealing film on the surface of the cable core;

a closed cavity is formed between the elastic sealing film and the outer isolating layer 4;

the inner surface of the outer isolation layer 4 is provided with a leakage detection device;

the leakage detection device comprises a leakage detection device shell 35, a telescopic cavity 36 is arranged in the middle of the leakage detection device shell, a fixed normally open contact 37 is arranged on the upper surface of the bottom of the telescopic cavity, and a movable contact 38 is arranged on the lower surface of the top of the telescopic cavity;

the fixed contact is connected to an alarm arranged outside the cable by means of a conductor 39.

In example 2, the space between the cabled core and the elastic sealing film is filled with a water-swellable material 40.

The water-swellable material is acrylonitrile or acrylate.

The leakage detection device shell is an elastic shell.

At least three closed cavities are formed; the leakage detection devices in different closed cavities are arranged in a staggered mode along the length direction of the cable; only one leakage detection device is arranged on one cross section of the cable; the leakage detection devices in the same closed cavity are uniformly arranged along the length direction of the cable.

The cooling pipe is a 316L stainless steel corrugated pipe.

The insulating layer of the power cable is IE2 type silicon rubber mixture.

The reinforced layer is an aramid fiber woven reinforced layer.

The inner protective layer and the outer protective layer are made of 5GM3 type chloroprene rubber mixture.

The isolation layer is a reinforced non-woven fabric.

Embodiment 3, a leakage detection device for a cable cooling device, comprising a cabling core, wherein an isolation layer 4, an inner protection layer 5, a reinforcement layer 6 and an outer protection layer 7 are sequentially arranged outside the cabling core; the insulated wire cores are twisted together to form a cable core;

the cabling core comprises a power cable 1, a ground wire 2 and a control cable 3;

the power cable 1 comprises a power cable conductor 11 and a power cable insulating layer 12 arranged outside the power cable conductor 11, wherein a cooling pipe 13 is arranged outside the power cable insulating layer 12, and the cooling pipe is spirally wound on the surface of the power cable insulating layer 12; cooling liquid is arranged in the cooling pipe; an insulating shielding layer 14 is extruded on the outer surface of the cooling pipe;

two ends of the cable are respectively provided with a sealing cover 31; the sealing cover is an elastic sealing cover;

the sealing cover comprises a shell, and the shell is sleeved on the outer surface of the cable;

the middle part of the sealing cover is provided with a through hole 32 for penetrating through the power cable 1, the ground wire 2 and the control cable 3;

an inner sealing core 33 extending inwards from the inner surface of the end surface of the shell is arranged inside the through hole;

an outer sealing core 34 extending inward from the inner surface of the end face of the housing is provided outside the through hole;

the inner side sealing core and the outer side sealing core are used for sealing a middle triangular gap formed by the power cable 1, the ground wire 2 and the control cable 3 at two ends of the cable;

the surface of the cable core is coated with an elastic sealing film 15;

a closed cavity 16 is formed between the elastic sealing film and the outer isolation layer 4;

a water-absorbing expansion material 40 is filled in a gap between the cabling core and the elastic sealing film;

the water-swellable material is acrylonitrile or acrylate.

The surface of the elastic sealing film 15 is provided with a leakage detection device 50;

the leakage detection device is a strain gauge pressure sensor which is connected with the detector through a lead; the lead wire connected with the detector penetrates through the sealing cover.

Embodiment 4, a leakage detection device for a cable cooling device, comprising a cabling core, wherein an isolation layer 4, an inner protection layer 5, a reinforcement layer 6 and an outer protection layer 7 are sequentially arranged outside the cabling core; the insulated wire cores are twisted together to form a cable core;

the cabling core comprises a power cable 1, a ground wire 2 and a control cable 3;

the power cable 1 comprises a power cable conductor 11 and a power cable insulating layer 12 arranged outside the power cable conductor 11, wherein a cooling pipe 13 is arranged outside the power cable insulating layer 12, and the cooling pipe is spirally wound on the surface of the power cable insulating layer 12; cooling liquid is arranged in the cooling pipe; an insulating shielding layer 14 is extruded on the outer surface of the cooling pipe;

two ends of the cable are respectively provided with a sealing cover 31; the sealing cover is an elastic sealing cover;

the sealing cover comprises a shell, and the shell is sleeved on the outer surface of the cable;

the middle part of the sealing cover is provided with a through hole 32 for penetrating through the power cable 1, the ground wire 2 and the control cable 3;

an inner sealing core 33 extending inwards from the inner surface of the end face of the shell is arranged inside the through hole;

an outer sealing core 34 extending inward from the inner surface of the end face of the housing is provided outside the through hole;

the inner side sealing core and the outer side sealing core are used for sealing a middle triangular gap formed by the power cable 1, the ground wire 2 and the control cable 3 at two ends of the cable;

the surface of the cable core is coated with an elastic sealing film 15;

a closed cavity 16 is formed between the elastic sealing film and the outer isolation layer 4;

the surface of the elastic sealing film 15 is provided with a leakage detection device 50;

the leakage detection device comprises an elastic supporting plate 51, wherein the front end of the elastic supporting plate is provided with a supporting seat 52, and the supporting seat is provided with a through hole; the guide rod 53 penetrates through the through hole; a fixed contact 54 is arranged on the outer side of the through hole along the radial direction, and a movable contact 55 is arranged on the outer side of the fixed contact; the movable contact is arranged at the front end of the guide rod; the rear end of the guide rod is connected with the rear end of the elastic support plate; the fixed contact is connected with an alarm outside the cable through a lead 56; the lead wire connected with the alarm penetrates through the sealing cover.

The guide arm is L-shaped and comprises a horizontal part and a vertical part, the horizontal part penetrates through the through hole, and the lower end of the vertical part is connected with the elastic supporting plate.

At least three closed cavities are formed; the leakage detection devices in different closed cavities are arranged in a staggered mode along the length direction of the cable; only one leakage detection device is arranged on one cross section of the cable; the leakage detection devices in the same closed cavity are uniformly arranged along the length direction of the cable; the leakage detection device is rectangular, and the axis of the guide rod is parallel or vertical to the axis of the cable.

According to the leakage detection device for the cable cooling device, the elastic sealing film wrapped on the surface of the cable core is expanded outwards along the radial direction under the pressure of the cooling liquid, so that the shell of the leakage detection device is compressed, the shell of the leakage detection device is an elastic body and is deformed by compression, the movable contact is in contact with the normally open fixed contact, the circuit is conducted, and the trigger signal is transmitted to the alarm through the lead to give an alarm.

According to the leakage detection device for the cable cooling device, after the cooling liquid leaks, the cooling liquid is firstly absorbed by the water-absorbing expansion material arranged in the gap between the cable core and the elastic sealing film, the water-absorbing expansion material expands in volume, the elastic sealing film expands outwards along the radial direction under the extrusion of the water-absorbing expansion material, and then the shell of the leakage detection device is compressed, the shell of the leakage detection device is an elastic body and deforms under the compression, the movable contact is in contact with the normally-open fixed contact, the circuit is conducted, and the trigger signal is transmitted to the alarm through the lead to give an alarm.

According to the leakage detection device for the cable cooling device, the elastic sealing film which wraps the surface of the cable core after the cooling liquid leaks is expanded outwards along the radial direction under the pressure of the cooling liquid, so that the shell of the leakage detection device is compressed, the shell of the leakage detection device is an elastic body and is deformed by compression, the movable contact is in contact with the normally open fixed contact, the circuit is conducted, and the trigger signal is transmitted to the alarm through the lead to give an alarm.

According to the leakage detection device of the cable cooling device, the elastic sealing film which is wrapped on the surface of the cable core after the cooling liquid leaks expands outwards along the radial direction under the pressure of the cooling liquid, the leakage detection device arranged on the surface of the sealing film is a strain gauge pressure sensor, and the strain gauge pressure sensor deforms and transmits signals to the detector through the conducting wire.

According to the leakage detection device for the cable cooling device, the elastic sealing film which is wrapped on the surface of the cable core after the cooling liquid leaks expands outwards along the radial direction under the pressure of the cooling liquid, the leakage detection device arranged on the surface of the sealing film is stretched to deform, the movable contact is in contact with the normally open fixed contact, the circuit is conducted, and the trigger signal is transmitted to the alarm through the lead to give an alarm.

According to the leakage detection device for the cable cooling device, the sealing covers are arranged at the two ends of the cable, so that the situation that power supply equipment is short-circuited and pollutes the environment due to the fact that cooling liquid flows out of the two ends of the cable when a cooling pipeline leaks is prevented, the leakage detection device for the cooling liquid is arranged in the sealing covers, the leakage detection device for the cooling liquid can detect the situation that the cooling liquid does not flow out of the end parts of the cable, potential safety hazards can be found as early as possible, equipment damage is prevented, and personal safety of workers is guaranteed.

The leakage detection device of the cable cooling device has the advantages that the elastic inner side sealing core and the elastic outer side sealing core are inserted into the cable, and the sealing effect can be improved.

The invention relates to a leakage detection device of a cable cooling device; the spiral stainless steel corrugated pipe is arranged outside the power cable conductor, and the cable can bear external force when being pulled, bent and twisted, so that the damage to a cable core is prevented; when the cable receives to roll, deformation through nonrust corrugated steel pipe protects the cable core, resistant drawing, resistant rolling, resistant buckling, resistant commentaries on classics, can prolong the life of cable.

According to the leakage detection device of the cable cooling device, the cooling pipe can ensure that heat generated when a cable conductor passes through current is taken away, and the current-carrying capacity of the cable is increased; the insulating layer adopts IE2 type silicon rubber mixture, so that the cable is guaranteed to have good electrical property and temperature-resistant grade, the temperature-resistant grade of the silicon rubber can reach 180 ℃, and the insulating layer can be guaranteed not to age due to long-time work when the cable works at high power. The metal shielding layer is woven by adopting tinned copper wires, so that the signal cable inside the cable is prevented from being interfered by external signals. The inner outer sheath and the reinforcing layer not only ensure that the cable has high resistance to pulling, rolling, bending, torsion and weather, but also ensure that the cable is easily bulged and further has the problem of core breaking due to the fact that the cooling pipe and the insulating layer are additionally arranged inside the conductor, and the structure of the inner outer sheath and the reinforcing layer can ensure that the cable is free from being greatly pulled and twisted, so that the defects of bulging, core breaking and the like are avoided.

According to the leakage detection device for the cable cooling device, the spiral stainless steel corrugated pipe is arranged on the outer side of the power cable conductor, so that interference of electromagnetic signals released by the cable on control signals in the cable and the surrounding environment is prevented while the signal cable in the cable is not interfered by external signals, and personal safety of workers nearby a charging pile is ensured.

A strain gage is a passive sensor that converts mechanical displacement into a change in resistance. Strain gage sensors are thin wafer-like devices that can be attached to a variety of materials to measure applied strain and are the basis for many types of sensors, such as pressure sensors, load cells, torque sensors, and the like.

Working principle of strain gauge

Foil strain gages are very common, in which a resistive foil is mounted on a backing material. They are available in various shapes and sizes, and are suitable for different scenes and applications. The electrical resistance of the foil changes as the attached material stretches or compresses.

This change in resistance is proportional to the applied strain. Since the magnitude of this change in resistance is very small, the effect can only be sensed by a wheatstone bridge. This is the basic working principle of strain gauges.

When strain is applied to the strain gage, the resistance of the strain gage sensor changes, the Wheatstone bridge becomes unbalanced, and current flows through the voltmeter. Since the net change in resistance is proportional to the applied strain, the resulting current flowing through the voltmeter is proportional to the applied strain. Thus, the voltmeter can be calibrated according to strain or force.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. Any simple modification, equivalent change and modification of the above embodiments according to the technical spirit of the present invention are within the technical scope of the present invention.

Claims (9)

1. A leakage detection device of a cable cooling device comprises a cabling core, wherein an isolation layer (4), an inner protection layer (5), a reinforcing layer (6) and an outer protection layer (7) are sequentially arranged on the outer side of the cabling core; the insulated wire cores are twisted together to form a cable core;

the cabling core comprises a power cable (1), a ground wire (2) and a control cable (3);

the power cable (1) comprises a power cable conductor (11) and a power cable insulating layer (12) arranged on the outer side of the power cable conductor (11), a cooling pipe (13) is arranged on the outer side of the power cable insulating layer (12), and the cooling pipe is wound on the surface of the power cable insulating layer (12) in a spiral shape; cooling liquid is arranged in the cooling pipe; the outer surface of the cooling pipe is extruded with an insulating shielding layer (14), and two ends of the cable are respectively provided with a sealing cover (31);

the sealing cover is an elastic sealing cover;

the sealing cover comprises a shell, and the shell is sleeved on the outer surface of the cable;

the middle part of the sealing cover is provided with a through hole (32) for penetrating through the power cable (1), the ground wire (2) and the control cable (3);

an inner sealing core (33) extending inwards from the inner surface of the end surface of the shell is arranged inside the through hole;

an outer sealing core (34) extending inwards from the inner surface of the end surface of the shell is arranged outside the through hole;

the inner side sealing core and the outer side sealing core are used for sealing a middle triangular gap formed by the power cable (1), the ground wire (2) and the control cable (3) at two ends of the cable;

the method is characterized in that: an elastic sealing film (15) is wound on the surface of the cabling core;

a closed cavity (16) is formed between the elastic sealing film and the outer isolation layer (4);

the inner surface of the outer isolation layer (4) is provided with a leakage detection device;

the leakage detection device comprises a leakage detection device shell (35), a telescopic cavity (36) is arranged in the middle of the leakage detection device shell, a fixed normally open contact (37) is arranged on the upper surface of the bottom of the telescopic cavity, and a movable contact (38) is arranged on the lower surface of the top of the telescopic cavity;

the fixed contact is connected to an alarm arranged outside the cable by a wire (39).

2. The cable cooling device leak detection device according to claim 1, wherein: and a water-absorbing expansion material (40) is filled in a gap between the cabling core and the elastic sealing film.

3. A cable cooling device leak detection device according to claim 2, wherein: the water-swellable material is acrylonitrile or acrylate.

4. The cable cooling device leak detection device according to claim 1, wherein: the leakage detection device shell is an elastic shell.

5. A cable cooling device leak detection device according to claim 1, wherein: at least three closed cavities are formed; the leakage detection devices in different closed cavities are arranged in a staggered mode along the length direction of the cable; only one leakage detection device is arranged on one cross section of the cable; the leakage detection devices in the same closed cavity are uniformly arranged along the length direction of the cable.

6. A leakage detection device of a cable cooling device comprises a cabling core, wherein an isolation layer (4), an inner protection layer (5), a reinforcing layer (6) and an outer protection layer (7) are sequentially arranged on the outer side of the cabling core; the insulated wire cores are twisted together to form a cable core;

the cabling core comprises a power cable (1), a ground wire (2) and a control cable (3);

the power cable (1) comprises a power cable conductor (11) and a power cable insulating layer (12) arranged on the outer side of the power cable conductor (11), wherein a cooling pipe (13) is arranged on the outer side of the power cable insulating layer (12), and the cooling pipe is wound on the surface of the power cable insulating layer (12) in a spiral shape; cooling liquid is arranged in the cooling pipe; an insulating shielding layer (14) is extruded on the outer surface of the cooling pipe, and two ends of the cable are respectively provided with a sealing cover (31);

the sealing cover is an elastic sealing cover;

the sealing cover comprises a shell, and the shell is sleeved on the outer surface of the cable;

the middle part of the sealing cover is provided with a through hole (32) for penetrating through the power cable (1), the ground wire (2) and the control cable (3);

an inner sealing core (33) extending inwards from the inner surface of the end surface of the shell is arranged inside the through hole;

an outer sealing core (34) extending inwards from the inner surface of the end surface of the shell is arranged outside the through hole;

the inner side sealing core and the outer side sealing core are used for sealing a middle triangular gap formed by the power cable (1), the ground wire (2) and the control cable (3) at two ends of the cable;

the method is characterized in that: the surface of the cable core is coated with an elastic sealing film (15);

a closed cavity (16) is formed between the elastic sealing film and the outer isolating layer (4);

the surface of the elastic sealing film (15) is provided with a leakage detection device (50);

the leakage detection device is a strain gauge pressure sensor which is connected with the detector through a lead; the lead connected with the detector penetrates through the sealing cover.

7. A leakage detection device of a cable cooling device comprises a cabling core, wherein an isolation layer (4), an inner protection layer (5), a reinforcing layer (6) and an outer protection layer (7) are sequentially arranged on the outer side of the cabling core; the insulated wire cores are twisted together to form a cable core;

the cabling core comprises a power cable (1), a ground wire (2) and a control cable (3);

the power cable (1) comprises a power cable conductor (11) and a power cable insulating layer (12) arranged on the outer side of the power cable conductor (11), a cooling pipe (13) is arranged on the outer side of the power cable insulating layer (12), and the cooling pipe is wound on the surface of the power cable insulating layer (12) in a spiral shape; cooling liquid is arranged in the cooling pipe; the outer surface of the cooling pipe is extruded with an insulating shielding layer (14), and two ends of the cable are respectively provided with a sealing cover (31);

the sealing cover is an elastic sealing cover;

the sealing cover comprises a shell, and the shell is sleeved on the outer surface of the cable;

the middle part of the sealing cover is provided with a through hole (32) for penetrating through the power cable (1), the ground wire (2) and the control cable (3);

an inner sealing core (33) extending inwards from the inner surface of the end surface of the shell is arranged inside the through hole;

an outer sealing core (34) extending inwards from the inner surface of the end surface of the shell is arranged outside the through hole;

the inner side sealing core and the outer side sealing core are used for sealing a middle triangular gap formed by the power cables (1), the ground wires (2) and the control cables (3) at two ends of the cable;

the method is characterized in that: the surface of the cable core is coated with an elastic sealing film (15);

a closed cavity (16) is formed between the elastic sealing film and the outer isolating layer (4);

the surface of the elastic sealing film (15) is provided with a leakage detection device (50);

the leakage detection device comprises an elastic support plate (51), wherein a support seat (52) is arranged at the front end of the elastic support plate, and a through hole is formed in the support seat; the guide rod (53) penetrates through the through hole; a fixed contact (54) is arranged on the outer side of the through hole along the radial direction, and a movable contact (55) is arranged on the outer side of the fixed contact; the movable contact is arranged at the front end of the guide rod; the rear end of the guide rod is connected with the rear end of the elastic support plate; the fixed contact is connected with an alarm outside the cable through a lead (56); the lead wire connected with the alarm penetrates through the sealing cover.

8. A cable cooling device leak detection device in accordance with claim 7, wherein:

the guide arm is L-shaped and comprises a horizontal part and a vertical part, the horizontal part penetrates through the through hole, and the lower end of the vertical part is connected with the elastic supporting plate.

9. A cable cooling device leak detection device in accordance with claim 8, wherein:

at least three closed cavities are formed; the leakage detection devices in different closed cavities are arranged in a staggered mode along the length direction of the cable; only one leakage detection device is arranged on one cross section of the cable; the leakage detection devices in the same closed cavity are uniformly arranged along the length direction of the cable; the leakage detection device is rectangular, and the axis of the guide rod is parallel or perpendicular to the axis of the cable.

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