KR101659521B1 - Residential electric cable joint protection case - Google Patents

Abstract

An electric cable protective case for a residential house of the present invention comprises: an electric cable embedded in an underground or installed in a grounded apartment; And a protective case for an electric cable which has a certain shape and space to protect the electric cable from the external environment and which surrounds the electric cable, wherein the protective case for the electric cable has a structure to withstand external impact, The present invention provides a technique for implementing a function or a structure for implementing a waterproof function.

Description

{RESIDENTIAL ELECTRIC CABLE JOINT PROTECTION CASE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection case for an electric cable for a residential house, and more particularly to a protection case for an electric cable, which has a certain shape and space for protecting an underground or ground electric cable from external environment, To a protection case for an electric cable for a residential house which is resistant to an external shock, has a soundproof and heat insulating function, and also realizes a waterproof function.

Generally, electric devices such as door phones, interphones, and lights installed in apartments and multi-family apartment buildings are installed by straight lines connecting the upper and lower layers of the electric devices and branching to each household through terminal boxes. The cable is generally inserted into the corrugated tube which protects the wire cable and fixed to the terminal box as a connector.

On the other hand, conduit pipes, gas pipelines, upper and lower water pipes, etc., in which the transmission and distribution wires are housed, are buried in underground, commercial and industrial parks. The reason why the underground railway is buried in the ground is due to the safety and the heat insulation. The underground railway buried in the ground for a long time should be repaired after a certain time after being corroded by breakage and penetration water due to its own aging.

However, the related art has a problem in that it can not provide a multi-purpose multi-function electric cable protection case for a dwelling house, such as being able to withstand external impacts, have a soundproof and heat insulating function, and realize a waterproof function.

Korean Patent Publication No. 10-2008-0093862

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a protective case for an electric cable having a certain shape and space for protecting an underground or ground electric cable from the external environment, And which has a soundproof and heat insulating function, and which implements a waterproof function.

According to an aspect of the present invention, there is provided an electric cable protection case for a dwelling house, comprising: an electric cable embedded in a basement or installed in a grounded apartment; And a protective case for an electric cable which has a certain shape and space to protect the electric cable from the external environment and which surrounds the electric cable, wherein the protective case for the electric cable has a structure to withstand external impact, A structure for implementing a function or a structure for implementing a waterproof function.

The present invention has a technical effect of providing an electric cable protection case for a dwelling which is resistant to an external impact, has a soundproof and heat insulating function, and also implements a waterproof function.

1 is an exploded perspective view of a protection case of an electric cable for a residential home according to the present invention.
FIG. 2A is an exploded perspective view illustrating an inner state of an electric cable protection case for a dwelling house according to a first embodiment of the present invention.
Fig. 2B is a cross-sectional perspective view showing the shape of a soundproofing / insulating member for an electric cable in the internal constitution of Fig. 2A.
FIG. 3A is a cross-sectional view illustrating a waterproof structure of an inner cable of a second embodiment of the present invention. FIG.
3B is a cross-sectional view of a heat shrinkable tube for processing a cable terminal whose color changes according to a temperature change according to a third embodiment of the present invention.
4A is a cross-sectional view illustrating an internal structure of a condensation and leakage leak type sensor provided inside a protective case for an electric cable for a residential house according to the present invention.
FIG. 4B is a circuit diagram for explaining the principle of measuring condensation and water leakage in an electric cable protection case using a condensation and leakage leak type sensor according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 is an exploded perspective view of a protection case of an electric cable for a residential home according to the present invention.

A protective case (10) for an electric cable for a dwelling according to the present invention comprises a housing (10) for enclosing the outside of the electric cable so as to be able to be safely protected from an external environment (waterproof, soundproof, (For example, a case, a tube, a box, etc.), and the installed position may be used in the underground, inside or outside of the apartment, depending on the purpose of use.

1, the present invention relates to an electric cable protection case 10 (so-called 'underground pipe') in which an underground cable is embedded in the ground and an electric cable protection case 10 A connection rubber ring 30 for sealing the connection portion between the protection tube 20 and the electric cable protection case 10 and left and right tightening rings 40a and 40b for firmly fixing the connection portion of the electric cable protection case 10, .

In this case, the electric cable protection case 10 is a cylindrical synthetic resin material in which an underground cable is embedded in the ground, front and rear side bending flanges 12a and 12b are formed at both ends, Is formed as a whole around the ice.

The protective tube 20 is formed of a rubber-like tube of a ring type fitted to the seat recess 11 of the electric cable protective case 10 and a curved protrusion 21 protruding outwardly curved in an arc shape is formed And the air buffering portion 22 is formed to be hermetically sealed therein to reduce the impact applied from the outside.

The connecting rubber ring 30 is a ring of rubber material that seals the connecting portion of the electric cable protective case 10 and is provided with an electric cable A flange insertion groove 31 for enclosing and sealing the front side bending flange 12b of the protection case 10 is formed and the other outer circumference of the electric cable protection case 10 without the protection tube 20 is enclosed .

The left and right fastening rings 40a and 40b are divided into right and left portions to hold the outer surface of the connecting rubber ring 30 in a fixed state while a pair of anchor bolts 41 protruding outward are formed at both ends And is fastened and fixed by a nut 43 by a fixing plate 42 having an anchor hole 42a into which the respective anchor bolts 41 are inserted so that the flow of the front and rear side bending flanges 12a, prevent.

In the present invention, the protection tube (20) is placed on the outer circumferential surface of the electric cable protection case (10) buried in the ground, and the knife of the excavator is directly connected to the protection tube It is possible to easily recognize that the electric cable protective case 10 is buried in the ground by the operation of the bucket which is shaken on the electric wire 20, thereby preventing damage to the underground cable.

2A is an exploded perspective view showing an inner state of an electric cable protection case for a dwelling house according to a first embodiment of the present invention. Fig. 2B is a cross- As shown in FIG.

Referring to FIGS. 2A and 2B, the interior of the electric cable protective case 10 for a dwelling according to the present invention includes an electric cable 15 and a soundproof insulation member 13 for an electric cable.

2B, the soundproof thermal insulating member 13 for an electric cable includes a conical insertion path 101, a contact insertion path 102, and a light incidence part 103. At this time, the flame- It accomplishes.

Since the conical insertion path 101 is formed in the form of a perforation in a front portion of the elastic member, the insertion path is formed in a shape that gradually becomes narrower, so that when the electric cable 15 is inserted, The electric cable 15 can be easily inserted without being caught by the inclination, and electric wires of various sizes can be inserted.

Meanwhile, the contact insertion path 102 is formed in a state in which it is in close contact with the conical insertion path 101 so as to communicate with the conical insertion path 101. In this state, the electric cable 15 passes through the conical insertion path 101 And then passes through the contact insertion path 102 to protrude out of the elastic member.

In this case, since the tight insertion path 102 is kept in tight contact with the electric cable 15 even when the electric cable 15 is not inserted, the soundproof insulation member 13 for the electric cable of the present invention, regardless of whether the electric cable 15 is inserted or not, It is needless to say that the airtightness is maintained even when the thickness of the electric cable 15 is small.

At this time, the conical insertion path 101 and the contact insertion path 102 are communicated to form a single wire insertion path, and a plurality of wire insertion paths may be formed. In a preferred embodiment of the present invention, Nine wire insertion holes were formed.

On the other hand, the light-and-heat insulating part (13) for an electric cable according to the present invention is inserted into the electric cable protective case (10) for a residential house as an inclined part on the outer side of the elastic member It can be easily inserted when it is inserted and not released after insertion.

 At this time, the conical insertion path 101 may be symmetrically formed around the contact insertion path 102 so that the front and rear surfaces of the elastic member are the same, and the front and back are symmetrically formed. It is possible to install it immediately without any process, which reduces the possibility of user error and simplifies installation.

Accordingly, the present invention can easily insert wires of various thicknesses by a conical insertion path without interfering with it, and it is possible to maintain an airtight state even when the wire is not inserted by the close insertion. When the wire is inserted, It is possible to maintain the airtight state by tightly adhering even when the electric wire is bent strongly so as to maintain the airtightness without being dependent on the number and thickness of the electric wires and to prevent sound insulation,

Further, it is formed of a flame-retardant elastic member, so that the fire is prevented from spreading through the conduit.

In addition, the light incidence part is inserted easily into the conduit since the diameter is narrow, and after the insertion, the part having a large diameter is prevented from being separated due to elasticity.

In addition, since the front and rear sides of the elastic member are formed symmetrically in the front and rear directions, it is possible to install the electric wire directly without dividing the front and rear sides, thereby reducing the possibility of user's mistakes and simplifying installation.

Hereinafter, the flame retardant thermoplastic composition used for the soundproof and heat insulating member 13 for an electric cable of the present invention or the case, tube and the like for protecting an electric cable will be described.

≪ Preparation of flame retardant thermoplastic composition >

The flame retardant thermoplastic composition according to the present invention can be prepared according to two different processes.

They can be prepared according to a two-step process:

In the first step, the coupling agent is prepared by simply mixing the two compounds.

Next, in the second step, the coupling agent prepared above is mixed with a flame retardant additive such as a copolymer of aluminum trihydrate and / or 2 magnesium hydroxide, an ethylenic monomer having ethylene and a polar functional group and also polyethylene to a melt.

It is not possible to have at least one of these two components in the composition according to the invention, such as polyethylene, although the aforementioned copolymer may not be present in the composition, and the coupling agent may be chosen especially from the copolymer and / And the like.

The compositions according to the present invention may also be prepared according to a one-step process wherein the components are mixed to produce a homogeneous composition and to perform any chemical reaction between the components.

These compositions can be prepared by conventional means using highly filled thermoplastic materials, for example by mixing various components via extrusion or blending.

An internal mixer, a cone or a twin-screw co-rotating extruder may be used. Preferably, the composition is prepared at a temperature above the melting point of the component and below the decomposition initiation temperature of the flame retardant.

Fillers, especially inorganic fillers, may be added to improve the thermomechanical strength of the composition. Nonlimiting examples that may be presented are silica, alumina, talc or calcium carbonate, or carbon nanotubes. Advantageously, modified or unmodified clays are used to meet the requirements of certain plastic flammability standards, such as UL94-V0 (self-extinction possible in up to 10 seconds, no ignition bubbles), which are mixed at the nanometer scale.

Plasticizers can be added to promote processing and improve the productivity of the composition and the method of making the structure.

Examples which may be mentioned are aromatic or naphthenic paraffin mineral oils. Plasticizers which may also be mentioned are phthalates, azelates, adipates and tricresylphosphates.

 Whether a "non-drip" agent, such as a silicone-based product (PDMS) or a fluoro product, such as PTFE, is added to the composition will not depart from the scope of the present invention.

<Examples>

 The present invention is a novel coupling agent for a thermoplastic flame retardant composition comprising maleic anhydride-grafted polyethylene having a melting point of greater than 115 캜 (centigrade), the coupling agent also being an ethylene / acrylate / maleic anhydride terpolymer And the proportion of the terpolymer corresponds to 33% to 99.5% by weight of the mixture forming the coupling agent.

According to an advantageous embodiment, the coupling agent according to the invention consists only of these two components: maleic anhydride-grafted polyethylene and ethylene / acrylate / maleic anhydride terpolymer.

Preferably, the proportion of the terpolymer falls between 34% and 67% by weight of the mixture. Even more preferably, the proportion of the terpolymer corresponds to 45% to 55% by weight of the mixture.

Advantageously, the abovementioned terpolymer is a terpolymer of ethylene, butyl acrylate and maleic anhydride.

Preferably, the aforementioned maleic anhydride-grafted polyethylene is a linear low density polyethylene.

Through such embodiments, the present invention relates to a composition comprising a first ethylene / acrylate / maleic anhydride terpolymer and, secondly, maleic anhydride-grafted polyethylene in a certain ratio, / RTI &gt; has a very beneficial synergistic effect with respect to maintenance of mechanical performance quality while maintaining the other properties of the composition, regardless of the physical / high humidity conditions.

The invention proposes a thermoplastic composition which satisfies all the specific requirements for electrical cables, optical fibers and more generally insulating parts in the electrical and electrical engineering field, so that in the high humidity medium, the mechanical properties of the prior art materials It is possible to relieve the lethal deterioration of the apparatus.

FIG. 3A is a cross-sectional view illustrating a waterproof structure of an inner cable of a second embodiment of the present invention. FIG.

Referring to FIG. 3, a heat shrinkable tube 10a is used as an example of an electric cable protection case 10 for a dwelling house. The heat shrinkable tube 10a includes a cover 16,

The peeled copper wire 15 and the resin 17 filled in the internal fixed space.

At this time, the heat shrinkable tube 10a is made of a transparent or semitransparent material, so that when the heat shrinkable tube 10a is inserted into a wire, the peeled portion of the wire can be inserted while being visually confirmed, So that the heat-shrinkable tube 10a is inserted into the correct portion of the electric wire.

In addition, resin is injected into the heat shrinkable tube 10a which is thermally shrunk and joined to the electric wire, and filled.

At this time, an injector (not shown) is used so that the resin can be easily injected into the heat shrinkable tube 10a. In order to inject the resin into the heat shrinkable tube 10a, As shown in Fig.

Forming the nozzle of the injector in the form of a needle is for injecting the resin while minimizing damage to the heat shrinkable tube 10a.

Further, the injector is discharged at a high pressure by the resin contained therein by the compressed air supplied from the outside. As a result, the resin injected into the heat-shrinkable tube 10a penetrates into the inside of the electric wire, so that the electric wire is further waterproofed.

On the other hand, the resin according to this embodiment can use any one selected from polyvinyl chloride, phenol resin and silicone, and it is particularly preferable to use silicon.

Thus, the present invention has the effect of inserting a heat shrinkable tube into a portion where the sheath of the electric wire is peeled and injecting resin into the heat shrinkable tube through the compressed air to seal the electric wire to more tightly seal the electric wire .

3B is a cross-sectional view of a heat shrinkable tube for processing a cable terminal whose color changes according to a temperature change according to a third embodiment of the present invention.

Referring to FIG. 3B, the heat-shrinkable tube 10b for treating a cable terminal according to the present invention performs a connection and insulation function between a cable 1 and a terminal joint of a connection bolt 2, have.

This heat shrinkable tube 10b starts to overheat at the terminals of the connection bolts 2 by adding a color change function that changes color depending on the temperature in the outer packaging portion so that the temperature of the cable 1 attached to the heat shrinkable tube 10b The color of the outer surface of the heat-shrinkable tube 10b gradually changes gradually.

For example, the outer surface of the heat-shrinkable tube 10b becomes dark red at a temperature set at an overheating temperature of 50 ° C. In the initial state (25 ° C), there is no change in color and the temperature of the cable 1 is moderately overheated In the state (35 ° C), it turns into a pale red color, and when it is close to the overheat set temperature (50 ° C), it becomes dark red.

As a result, the heat-exporting tube for treating a cable terminal of the present invention adds a discoloring function of changing the color of a surface according to temperature to a heat-shrinkable tube, and when the cable is overheated, the color of the surface of the heat-shrinkable tube is also changed to check the surface color of the discolored heat- It is possible to determine the degree of overheating of the bolt terminal.

In addition, since the heat-shrinkable tube for treating a cable terminal of the present invention can be visually inspected for an overheated location, it can not be equipped with expensive overheat measuring equipment. However, the risk of internal fire Thereby contributing to the improvement of the stability of the operation of the control panel which is vulnerable to fire.

4A is a cross-sectional view illustrating an internal structure of a condensation and leakage leak type sensor provided inside a protective case for an electric cable for a residential house according to the present invention.

Referring to FIG. 4A, the condensation and leakage integrated type sensor 120a according to the present invention is installed on one side of an inner side of an electric cable protective case for a dwelling house having a constant internal space, and includes a lower insulator 121a made of a PET film, The lower insulator 121a and the upper insulator 121b have a first width W1 (preferably 30 mm) and are provided between the lower insulator 121a and the upper insulator 121b. And has a first width T1 (preferably 0.5 mm).

The lower insulator 121a includes a first lower electrode D (+) 122a for sensing dewfall, a second lower electrode L (+) 122b for sensing the state of leakage, A third lower electrode N (-), 122c serving as a neutral line is formed.

In this case, the first lower electrode 122a and the second lower electrode 122b have a first gap d1, the second lower electrode 122b and the third lower electrode 122c have a second gap d2 Preferably d1 = d2 = 0.5 mm) and arranged in a film form.

The first lower electrode 122a to the third lower electrode 122c may be formed in the form of a film using a nano silver or nano ink technique so that the present invention can be applied to the lower electrodes 122a to 122c, Not only can be easily cut, but also has advantages of easy re-assembly, low price, and easy installation and operation.

A plurality of holes h1 and h2 are formed in the upper insulator 121b with a predetermined first interval S1 (preferably 10 mm). When the water drops 3 are formed on the upper insulator 121b, When the water droplets 3 flow through the holes h1 and h2, the microcurrent corresponding thereto is measured (refer to FIG. 4B), and the electric cable protection for the apartment house having a constant internal space The condensation state and the leakage state inside the case are detected.

FIG. 4B is a circuit diagram for explaining the principle of measuring condensation and water leakage in an electric cable protection case using a condensation and leakage leak type sensor according to the present invention.

Referring to FIG. 4B, when water droplets 3 are formed on the upper insulator 121b, the droplets 3 collect to form the upper electrode 123b. The upper electrodes 123b serve as resistors R1, R2, and R3, And the currents I1, I2 and I3 flow through the resistors R1, R2 and R3, respectively.

That is, the third resistor R3 is formed by the upper electrode 123b on the neutral electrode N (-) and the condensation detection electrode D (+), and the third current R3 I3) flows, this is measured to detect the condensation state in the switchboard.

In this case, the third current I3 has a total of 5uA due to, for example, five contacts.

A first resistor R1 is formed by the upper electrode 123b on the neutral electrode N (-) and the first leak sensing electrode L1 (+), and the first resistor R1 is connected to the first resistor R1 I1) flows, it measures this and detects the leakage of the first stage in the switchboard.

In this case, the first current I1 has a total of 5uA due to the five contacts, and it is determined that the leakage current is one step.

The second resistor R2 is formed by the upper electrode 123b at the neutral electrode N (-) and the second leak detection electrode L2 (+), and the second current R2 I2) flows, and measures the leakage of the second step in the electric cable protection case for the residential house having a constant internal space by summing the first current (I1) and the second current (I2).

In this case, the second current I2 has a total of 5uA due to the five contacts, and the sum of the first current I1 and the second current I2 is 10uA, so that the leakage current is determined to be two stages.

Accordingly, the present invention can easily detect the condensation state and the degree of leakage occurring at the same point by using the condensation and leak-type integrated type sensor. This is because the conventional condensation detector and the leak detector are relatively Installation cost and manufacturing cost are small.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention.

10: Electric cable protection case
11:
12a, 12b: front and rear side bending flanges
20: Protection tube
21: curved protrusion
22: air buffer
30: Connecting rubber ring
31: Bending flange insertion groove
40a, 40b: Right and left fastening rings
41: Anchor bolt
42: Fixing plate
42a: Anchor ball
43: Nuts

Claims (3)

Electrical cables embedded in underground or in a residential complex on the ground;
And a protective case for an electric cable having a certain shape and space to protect the electric cable from an external environment and to house the electric cable therein,
The protective case for an electric cable,
It has a structure that can withstand external impact, a structure that implements a soundproof insulation function, or a structure that implements a waterproof function,
The protective case for an electric cable, which has a structure for implementing the sound insulation and heat-insulating function,
A conical insertion formed through the front portion of the body in a conical shape and into which the electric cable is inserted;
A tight insertion hole penetrating to communicate with the conical insertion path and formed in a state in which the electric cable is not inserted; And
And an inclined light incidence part on the outer side of the body to narrow the front side part. The method according to claim 1,
In the protective case for an electric cable having a structure that can withstand the external impact,
An underground pipe made of a synthetic resin material, which is buried in the ground and has an underground line inside, a front and a rear side bending flange are formed at both ends, and a seat back is formed entirely around the outer periphery;
A rubber tube of a ring type sandwiched between the seat back of the underground pipe and a curved protrusion protruding outwardly in a curved shape is formed on the outer circumference of the tube, ;
Wherein a bending flange insertion groove for enclosing and sealing a front side bending flange of another underground tube closely attached to a rear side bending flange of the underground tube is formed at an inner peripheral edge of a ring body made of a rubber material, A connecting rubber ring enclosing and sealing; And
And a pair of anchor bolts protruding outward are formed at both ends of the ring body so as to surround the outer surface of the connecting rubber ring. The anchor bolts are fastened and fixed by nuts by a fixing plate having an anchor holes into which the respective anchor bolts are respectively inserted And a left and right tightening rings for preventing the flow of the front and rear bent flanges of the underground pipe. delete

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