KR20020014866A - Cable for sensing temperature and method thereof - Google Patents

Abstract

PURPOSE: A temperature sensing cable and its preparation method are provided, which senses and checks whether a body to be checked is short or not, to prevent a fire and to maintain the body to be checked more systematically. CONSTITUTION: The temperature sensing cable comprises a plurality of conductors(10) which is to be short according to the temperature change and transmits the fire signal if it is determined to be a short circuit and has a diameter of 0.8-0.9 mm; thermoplastic resin insulators(20) which wrap the conductors(10) in a thickness of 0.2-0.3 mm, and are melt at a temperature of 70-120 deg.C to make the conductors be short; a polyester tape(30) which twists and combines the insulators(20) in a thickness of 0.015 mm; and poly(vinyl chloride)(40) which jackets the conductors(10) the insulators(20) in a thickness of 0.5-1.0 mm. Preferably the conductors(10) comprises 70-90 g/m3 of Zn; 0.7-1.0 wt% of C; and 0.5-0.7 wt% of Mn, and has a tensile strength of 2,300-2,500 Mpa and an elongation of 2-3 %.

Description

Temperature sensing cable and manufacturing method thereof

The present invention relates to a technology for sensing the temperature of a sensing object (especially a cable) installed in a power outlet, a cavity, a communication port, a cable tray, a chemical plant, a gas tank, a dangerous goods storage, and particularly, a temperature of a cable that is a sensing object. The present invention relates to a temperature sensing cable and a method for manufacturing the same, which are intended to manage the sensing object more systematically while checking the short circuit or short circuit condition in advance.

Conventionally, cables, which are objects to be installed in electric power tools, cavity ports, communication ports, cable trays, chemical plants, gas tanks, dangerous goods storage, etc., are mainly embedded in underground spaces to supply communication or power.

However, the cable as the sensing object as described above is buried in the underground space, and has a disadvantage in that the management of the manager is not properly performed.

In other words, the cable, which is an object to be buried underground, is managed by the administrator with constant interest, but this is managed only based on the specified date, but real time monitoring of the object is not possible. It was.

In addition, when the work is carried out underground where the sensing object is buried, especially when welding work, welding sparks often spread to the sensing object, and when there is no rapid response, it is often developed into a large fire.

That is, in the related art, when a fire occurs due to work in the underground where a sensing object is buried or a short circuit occurs due to a short circuit or short circuit between each cable, which is a sensing object, the closed stage that develops into a large fire is not recognized in advance. Followed.

Therefore, the present invention has been made to solve the conventional problems as described above, the object of the present invention, by configuring a temperature sensing cable for sensing the ambient temperature of the sensing object, such as a short circuit or short circuit state of the sensing object cable It is to provide a temperature sensing cable and its manufacturing method to prevent the development of large-scale fire in advance, and to manage the sensing object more systematically while allowing to check in advance.

1 is a perspective view showing the structure of the cable for temperature sensing in one embodiment of the present invention.

2 is a cross-sectional view taken along line AA ′ of FIG. 1 according to one embodiment of the present invention;

Figure 3 is a state of use of the cable for temperature sensing in one embodiment of the present invention.

Figure 4 is a state of use of the cable for temperature sensing in another embodiment of the present invention.

* Explanation of symbols on the main parts of the drawings *

10; Conductor 20; Insulator

30; Polyester tape 40; PVC

100; Temperature sensing cable

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a perspective view showing a structure of a temperature sensing cable according to an embodiment of the present invention, Figure 2 is a cross-sectional view of the AA 'of Figure 1 as an embodiment of the present invention, Figure 3 is an embodiment of the present invention temperature The use of the sensing cable is also shown.

As shown in Figures 1 to 3, the temperature sensing cable 100 is installed around a sensing object (especially a cable) installed in a power outlet, a cavity, a communication port, a cable tray, a chemical plant, a gas tank, a dangerous goods storage, and the like. As a possible structure,

A plurality of conductors (10) having a predetermined diameter (??; 0.8 to 0.9 mm) for shorting according to a temperature change of the sensing object and transmitting a fire occurrence signal due to a short circuit or a short circuit of the sensing object;

Each of the plurality of conductors 10 is wrapped to a predetermined thickness (t; 0.2 to 0.3 mm), and is available at a specific temperature (70 ° C. to 120 ° C.) generated around the sensing object to shorten the conductors 10. An insulator 20 which is a thermoplastic resin to make;

A polyester tape (30) in which each of the insulators 20 is joined in a twisted form with a predetermined thickness (t; 0.015 mm);

Polyvinyl Chloride (PVC), which jackets the conductor 10 and the insulator 20, which are fed from the polyester tape 30, to a predetermined thickness (t; 0.5 to 1.0 mm) ( 40); Consists of

According to another aspect of the present invention, the conductor 10 has a zinc (Zn) adhesion amount of 70 to 90 g as a component of the galvanized hard steel wire so that a short is made from the insulator 20 that is made available according to a change in ambient temperature of the sensing object. / ㎥, carbon (C) content of 0.7-1.0 wt%, manganese (Mn) content of 0.5-0.7wt%, tensile strength of 2300-2500 Mpa, elongation of 2-3% Manufacturing,

The insulator 20 is ethylene vinyl acetate (EVA) having 15 to 40 wt% of vinyl acetate (VA; Vinyl Acetate) as a thermoplastic resin so as to surround the conductor 10 and to be available at a specific temperature to short the conductor 10. Ethylene Vinyl Acetate) The polymer is insulated and coated as a main component.

The polyester tape 30 is preferably in the form of twins of each insulator 20 and tapered with a thickness of 0.015 mm and a width of 10 to 20 mm with a overlap of 1/5 or more.

The PVC 40 is mixed with a polyester elastomer (PSE) as a base polymer to cover the insulator 20 and the conductor 10 formed by the polyester tape 30 so that thermoplastic can be secured. It is preferable to mix-process heat stabilizers, fillers, plasticizers, and pigments.

According to another aspect of the present invention, the insulator 20 is blended with EVA or linear low density polyethylene (LLDP) according to the EVA polymer, filler (filler) and antioxidant (antioxident) ) And beeswax and pigments may be insulated and coated.

Here, the insulator 20 and the PVC 40 have an extruder load (L) and a cylinder diameter (D) of L: D = 24: 1, and a compression ratio (C / R; Compression / Rate) of C: R. It is preferable to carry out extrusion coating with the thickness of 0.2-0.3 mm at 140-150 degreeC, making = 3: 1.

In addition, the insulator 20 may be different from the insulation coating by adjusting the content of the main component according to the reaction temperature of the sensing object,

When the reaction temperature of the sensing object is 70 ° C, insulation coating is performed based on ethylene vinyl acetate (EVA) polymer having 25 to 40 wt% of vinyl acetate (VA),

When the reaction temperature of the sensing object is 90 ℃, insulation coating is mainly made of ethylene vinyl acetate (EVA) polymer having 15-25 wt% of vinyl acetate (VA).

Insulation coating by blending EVA or linear low-density polyethylene (LLDP) according to ethylene vinyl acetate (EVA) polymer with vinyl acetate (VA) of 15-25 wt% when the reaction temperature of the sensing object is 120 ℃ It is preferable to.

On the other hand, the insulator 20 includes a PVC material, the PVC material is mixed with a thermoplastic elastomer (PVC) in a PVC resin as a special material to improve the durability while facilitating temperature transfer when in contact with the sensing object. This is preferred.

Hereinafter, with reference to the accompanying Figures 1 to 3 will be described the operation of the preferred embodiment of the present invention.

First, a plurality of conductors 10 having a diameter of 0.8 to 0.9 mm are made to be shorted in accordance with the temperature change of the sensing object and to transmit a fire occurrence signal due to crosstalk of the sensing object.

That is, the conductor 10 is a component of galvanized hard wire, Zn adhesion amount of 70 ~ 90g / ㎥, C content 0.7 ~ 1.0 wt%, Mn content 0.5 ~ 0.7wt%, tensile strength 2300 ~ 2500 Mpa, The diameter is made 0.8 to 0.9 mm while the wire is 2 to 3%.

Thereafter, the main component is an ethylene vinyl acetate (EVA) polymer having 15 to 40 wt% of vinyl acetate (VA) to shorten the conductor 10 while being available at a specific temperature (70 ° C. to 120 ° C.) generated around the sensing object. After insulating insulation of the insulator 20 which is a thermoplastic resin, the plurality of conductors 10 are wrapped with the thickness of 0.2 to 0.3 mm, respectively.

That is, the insulator 20 has an extruder load (L) and a cylinder diameter (D) of L: D = 24: 1 and its compression ratio (C / R) of C: R = 3: 1, while operating temperature is 140 Extrusion coating is carried out at a thickness of 0.2-0.3 mm at -150 ° C.

Then, the polyester tape 30 is tapered with a thickness of 1/5 or more, while the insulator 20 surrounding each conductor 10 is combined in a twins form with a thickness of 0.015 mm and a width of 10 to 20 mm.

Thereafter, the polyester tape 30 is mixed with the PSE as a base polymer, and the PVC 40 mixed with the heat stabilizer, the filler, the plasticizer, and the pigment is processed so that the thermoplastic can be secured. The extruder load L and the cylinder diameter ( When D) is L: D = 24: 1 and its compression ratio (C / R) is C: R = 3: 1, the extrusion process is performed by jacket coating by extrusion coating at a thickness of 0.5 to 1.0 at 140 to 150 ° C. Manufacturing of the temperature sensing cable 100 for sensing the ambient temperature of the sensing object is completed.

Therefore, when the temperature sensing cable 100 is placed close to the sensing object (especially the cable) installed in the power outlet, cavity, communication port, cable tray, chemical plant, gas tank, dangerous goods storage, the sensing object When a short circuit or a short circuit occurs in, the insulator 20 melts and a plurality of conductors 10 surrounded by the insulator 20 are shorted to each other.

At this time, the conductor 10 is to be installed while making an electrical connection with a specific place (eg, community management office, etc.),

The management station detects the short-circuit or short-circuit state of the sensing object in real time after contacting a signal generated from a plurality of conductors 10 in real time, thereby preventing the development of large-scale fire due to the short-circuit or short-circuit in advance. will be.

That is, the insulator 20 is different from the insulation coating by adjusting the content of the main component according to the reaction temperature of the sensing object,

When the reaction temperature of the sensing object is 70 ° C, the insulator 20 is made of an ethylene vinyl acetate (EVA) polymer having 25 to 40 wt% of vinyl acetate (VA) as the main component to insulate and cope with it.

In addition, when the reaction temperature of the sensing object is 90 ℃, the insulator 20 is made of an ethylene vinyl acetate (EVA) polymer having a vinyl acetate (VA) of 15 to 25 wt% as the main component to the insulation coating to enable the response. .

Here, the insulator 20 includes a PVC material, and the PVC material is used by mixing a thermoplastic rubber with a PVC resin as a special material to improve the durability while facilitating temperature transfer when contacted with the object to be sensed as much as possible.

On the other hand, the insulator 20 may produce the same effect by mixing the EVA or linear low-density polyethylene (LLDP) according to the EVA polymer and then insulating coating the composite formulated with fillers and antioxidants, beeswax and pigments,

When the reaction temperature of the sensing object is 120 ° C, the insulation coating is performed by mixing EVA or linear low-density polyethylene (LLDP) according to ethylene vinyl acetate (EVA) polymer having vinyl acetate (VA) of 15 to 25 wt%. It will be possible to respond.

On the other hand, Figure 4 is another embodiment showing the installation state of the temperature-sensing cable 100 as a cable that is the sensing object as well as the configuration thereof is the same as in the embodiment of the present invention, and thus duplicated description is omitted.

As described above, the present invention prevents the development of large-scale fires in advance while allowing the short-circuit or short-circuit state of the cable to be detected to be checked in advance through a temperature sensing cable that senses the ambient temperature of the sensing object. It provides the effect of managing the detected object more systematically.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (8)

A plurality of conductors having a diameter of 0.8 to 0.9 mm so as to be shorted according to a temperature change of the sensing object and to transmit a fire occurrence signal due to a short circuit or a short circuit of the sensing object; An insulator which wraps the plurality of conductors with a thickness of 0.2 to 0.3 mm, respectively, and is a thermoplastic resin which is available at a temperature of 70 ° C. to 120 ° C. generated around the sensing object to shorten the conductors; A polyester tape in which each insulator is combined in a twins form with a thickness of 0.015 mm; Polyvinyl chloride (PVC) which jacketed the conductor and the insulator made from the polyester tape to the thickness of 0.5-1.0 mm; Cable for temperature sensing, characterized in that consisting of. Zinc (Zn) adhesion amount is 70 ~ 90g / ㎥, carbon (C) content is 0.7 ~ 1.0 wt%, and manganese is a component of galvanized steel wire so that short phenomenon occurs from insulator which is available according to the change of ambient temperature of sensing object. (Mn) content of 0.5 ~ 0.7wt%, tensile strength is 2300 ~ 2500 Mpa, the stranded wire is prepared 2 ~ 3%, The conductor is wrapped in an insulator insulated and coated with an ethylene vinyl acetate (EVA) polymer having 15 to 40 wt% of vinyl acetate (VA) as a thermoplastic resin so as to shorten the conductor at a specific temperature. Each of the insulators is tapered with a polyester tape in a twins form with a thickness of 0.015 mm and a width of 10-20 mm with a overlap of 1/5 or more, The polyester tape is manufactured as a base polymer while being mixed with PSE to manufacture a cable for temperature sensing, characterized in that the jacket is treated with polyvinyl chloride (PVC) mixed with a heat stabilizer, filler, plasticizer, and pigment so that thermoplastic can be secured. Way. The method of claim 2, wherein the insulator includes a PVC material, the PVC material is characterized in that the thermoplastic resin is mixed with the PVC resin as a special material to facilitate the temperature transfer when in contact with the sensing object as much as possible to improve durability. Temperature sensing cable manufacturing method. The method of claim 2, wherein the insulator is an insulating coating comprising, as the main component, an ethylene vinyl acetate (EVA) polymer having 25 to 40 wt% vinyl acetate (VA) when the reaction temperature of the sensing object is 70 ° C. Sensing cable manufacturing method. The temperature of claim 2, wherein the insulator is insulated and coated based on an ethylene vinyl acetate (EVA) polymer having 15 to 25 wt% of vinyl acetate (VA) when the reaction temperature of the sensing object is 90 ° C. Sensing cable manufacturing method. The method according to claim 2, wherein the EVA or linear low-density polyethylene (LLDP) according to the ethylene vinyl acetate (EVA) polymer having a vinyl acetate (VA) of 15 to 25 wt% when the reaction temperature of the sensing object is 120 ℃ Cable manufacturing method for temperature sensing, characterized in that the insulating coating (blending). 3. The insulator and polyvinyl chloride according to claim 2, wherein the extruder load (L) and the cylinder diameter (D) are L: D = 24: 1, and the compression ratio (C / R) is C: R = 3: 1. The temperature sensing cable manufacturing method characterized in that the extrusion coating to a thickness of 0.2 ~ 0.3mm at 140 ~ 150 ℃. The method of claim 2, wherein the insulator is mixed with EVA or linear low-density polyethylene (LLDP) according to the EVA polymer, and the insulation is coated with a filler and an antioxidant, beeswax and pigment-prescribed composite Cable manufacturing method.