KR20210157721A - Cable fixing device with sealing structure inside - Google Patents

Abstract

Disclosed is a cable fixing device mounted with a shielding structure. According to the present invention, the cable fixing device mounted with the shielding structure, which prevents external exposure and damage of electric cables and fixes the cables to explosion-proof facilities in a sealed state, includes: a first fastening part screwed to one side of a first explosion-proof facility and having a first hollow through which a cable passes and formed in a central part; a second fastening part extending from the first fastening part to form a screw coupling with a second explosion-proof facility on an opposite side, and having a second hollow communicating with a first hollow through which the cable passes and formed in the central part; a connection part provided between the first and second fastening parts, and having a third hollow communicating with the first and second hollows with steps, formed in a central part, and through which the cable passes, and an inlet through which an outside and the third hollow communicate with each other; and a shielding part including a shielding material selectively filled in the third hollow from the outside through the inlet, and a closing member for closing the inlet, wherein heat or pressure transfer between the first and second explosion-proof facilities is blocked. According to the present invention, a cable leading from the first explosion-proof facility to the second explosion-proof facility is firmly fixed without damage in a sealed state with the outside air, and the heat or pressure transfer between the first and second explosion-proof facilities is effectively blocked based on the shielding material injected and filled from the outside, so that improvement of stable explosion-proof performance is expected.

Description

Shielded structure built-in cable fixture {CABLE FIXING DEVICE WITH SEALING STRUCTURE INSIDE}

The present invention relates to a shielded structure internal type cable fixture, and more particularly, to a fixture that protects an electric cable used in an explosion-proof facility from being exposed to the outside and securely fixes it to the explosion-proof facility.

Electrical equipment used in chemical plants, oil refineries, and factories that generate fine dust generates arc discharges, overheating, and sparks that cause fire or explosion accidents when exposed to explosive gases, oil vapors, or fine dust, so strict explosion-proof standards It is installed and operated according to

In particular, in case of a fire or explosion accident, the electric cable constituting the electric equipment is the main cause of causing secondary fires in the surrounding electric devices or other equipment by transmitting flames or flames to the surroundings. The cables are safely isolated using an explosion-proof facility with a sealed structure.

In order to more safely block fire or explosion accidents in chemical plants, etc. together with the isolation of these cables, sealing connectors for blocking the transmission of flames or flames at regular intervals are attached to explosion-proof facilities through which cables pass.

Among the prior art related to explosion-proof facilities, Korean Utility Model Publication No. 20-2009-0000608 (published date: January 21, 2009) describes a technology for a sealing connector of an explosion-proof multi-core cable. In this prior art, the main body 11 and the sealing bushing 12 are coupled to each other by a nut 13 on one side, and the grand body 15 and the fitting 16 are coupled to the sealing bushing 12 by the nut 17 The entire connector 10 is configured in a structure coupled to each other by It is characterized in that the housing 100 is inserted and installed.

However, in this prior art, in that it is difficult to insert the housing 100 into the sealing bushing 12 in a state where it is installed without separating the explosion-proof equipment such as the main body 11 and the fitting 16, the workability for installation is significantly lowered. there is a problem.

In addition, even when the housing 100 is inserted inside the sealing bushing 12 after removing any one of the main body 11 and the fitting 16, the cable 2 is placed in the through hole 150 and the through hole 150 ) The sealing operation of filling the inside with the filler 5 is performed without a member that regulates the flow of the filler 5 and holds the shape, so that the filler 5 does not maintain a constant shape and flows. (5) surrounds the cable (2) and there is a problem in that both sides cannot be tightly sealed with respect to the housing (100).

Therefore, it is necessary to research and develop an explosion-proof facility that can be easily installed and operated in an already installed explosion-proof facility while improving the degradation of the explosion-proof performance of the sealing connector.

Korea Public Utility Model No. 20-2009-0000608 (Publication Date: January 21, 2009)

It is an object of the present invention to easily fix a plurality of cables wired to a chemical plant, etc. that handle substances with a high risk of explosion to an explosion-proof facility such as a protection pipe or an electric junction box in a sealed state with the outside air, while being explosion-proof after installation It is to provide a cable fixture with a built-in shielding structure that can improve explosion-proof performance by tightly sealing the space through which cables pass by easily filling various shielding materials from the outside without separating the equipment.

The above object is to prevent external exposure and damage of the electric cable, and as a cable fixture for fixing the cable to the explosion-proof facility in a sealed state, the first explosion-proof facility on one side and the screwed connection, and the cable passing through the central part a first fastening part having a hollow formed therein; a second fastening part extending from the first fastening part to form a screw connection with a second explosion-proof facility on the other side, and having a second hollow communicating with the first hollow in the central part through which the cable passes;

A third hollow provided between the first and second fastening parts and communicated with each of the first and second hollows at a step in the central part through which the cable passes, and an inlet for communicating the outside and the third hollow with each other penetrates formed connection; and a shielding part composed of a shielding material selectively filled in the third hollow from the outside through the inlet, and a closing member for closing the inlet, a shield to block heat or pressure transfer between the first and second explosion-proof facilities Structural built-in cable anchorage is achieved.

The cable fixture is inserted through the first hollow in a state of being penetrated by the cable, one end is fitted and fixed in the third hollow, and the other end is screwed into the first explosion-proof facility with respect to the first fastening portion. It may further include a first sealing portion of the elastic material fixed by pressure.

The cable fixture further includes a second sealing part of an elastic material that is inserted through the second hollow in a state penetrated by the cable and has one end fixed to the third hollow, so that the sealing of the third hollow is possible. can be done

On a portion of the inner circumferential surface of the connection part forming the third hollow, irregularities for preventing separation of the filled shielding material may be repeatedly formed along the cable.

The shielding material may be a high-temperature resistant epoxy or foamed epoxy that is attached and fixed in the third hollow through a curing process in a viscous liquid state.

The shielding material may be a fire-resistant mortar including at least one of clay, silica, xiaote, chromium, alumina, and chromium magnesia, which are heat-resistant materials, on a base in which cement is kneaded in water.

At least one of the first fastening part and the second fastening part, the first and second explosion-proof facilities in a screwed state through at least one of the first fastening part and the second fastening part are pressed and fixed A fixing member is further provided, and between the first fastening part and the first explosion-proof facility forming a screw connection, and between the second fastening part and the second explosion-proof facility, epoxy for sealing may be filled.

According to the present invention, the first and second fastening parts through which the cable passes through each screwed connection with the first explosion-proof facility on one side and the second explosion-proof facility on the other side, and the first and second connection parts that communicate with the outside air through the inlet and that the cable passes through 3 As the hollow connection part is provided between the first and second coupling parts, the shielding material can be easily filled in the third hollow from the outside, so that the cable from the first explosion-proof facility to the second explosion-proof facility is sealed with the outside air. It can be fixed firmly without damage in the state of being, and heat or pressure transfer between the first and second explosion-proof facilities is effectively shielded based on the shielding material injected and filled from the outside, so that stable improvement of explosion-proof performance can be expected.

In addition, as it has a single structure in which the first and second fastening parts and the connecting parts are integrally formed, it can be easily installed and replaced between the first and second explosion-proof facilities that are already installed, and furthermore, the shielding material is selectively used according to the explosion-proof standards This has the effect of changing the explosion-proof performance in various ways.

1 is a state diagram showing a state in which a shielding structure built-in cable fixture according to an embodiment of the present invention is coupled between an explosion-proof lamp, which is an explosion-proof facility, and an electric junction box.
2 is a perspective view and a cross-sectional view of a shielding structure built-in cable fixture according to an embodiment of the present invention.
3 to 6 are views showing step-by-step the process of installing the shielding structure built-in cable fixture according to the embodiment of the present invention based on the cross-section of the region A of FIG. 1 .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, descriptions of already known functions or configurations will be omitted in order to clarify the gist of the present invention.

1 is a state diagram showing a state in which a shielding structure internal type cable fixture according to an embodiment of the present invention is coupled between an explosion-proof lamp, which is an explosion-proof facility, and an electric junction box, and FIG. 2 is a shielding structure according to an embodiment of the present invention. It is a perspective view and a cross-sectional view of a tongue-type cable fixture, and FIGS. 3 to 6 are views showing step-by-step the process of installing a shielding structure internal cable fixture according to an embodiment of the present invention based on the cross-section for area A of FIG. 1 .

Top (top), bottom (bottom), left and right (side or lateral), front (front, front), rear (back, back), etc., which refer to directions in the description and claims of the invention, etc. are not used for limiting rights For convenience of explanation, it is determined based on the relative positions between the drawings and the configuration, and the three axes may be rotated to correspond to each other and changed, except where specifically limited otherwise.

The shielding structure internal cable fixture 100 according to the present invention is basically an explosion-proof facility 10 of a sealed structure such as the explosion-proof lamp 14, the electric junction box 13, and a pipe connecting them to each other as shown in FIG. ) The electric cable (C) wired inside can be fixed in a sealed state with the outside air without damage due to flow, heat or pressure transfer between adjacent explosion-proof facilities 10 can be effectively shielded, and adjacent explosion-proof facilities installed (10) This is an invention devised so that it can be easily installed and replaced between.

This invention is, as shown in FIG. 1, the connection part 130 between the pipe and the terminal box, which requires fixing of the cable C from the inside, or the explosion-proof lamp 14 and the electrical junction box 13 adjacent to each other as shown in the figure. By installing it between the various explosion-proof facilities 10 such as the connection part 130 , it is possible to improve the explosion-proof performance of the explosion-proof facility 10 .

Here, the explosion-proof facility 10 is a chemical plant, an oil refinery plant, or a high-risk facility such as a factory where fine dust is generated, while sealing electricity and other equipment that may cause a fire or explosion from the outside air, while protecting it from explosive pressure or high temperature. It encompasses all parts or devices prepared for protection, and as shown in the example shown in FIG. 1, consists of an explosion-proof lamp 14, an electrical junction box 13 of an explosion-proof lamp, a pipe 11, and a terminal box 12, etc. can be

In order to specifically implement the function or function as described above, the shielding structure internal cable fixture 100 according to an embodiment of the present invention, as shown in FIGS. 2 and 6, a first fastening part 110 , the second fastening part 120 , the connecting part 130 , the shielding part 140 , the first sealing part 150 , the second sealing part 160 , the fixing member 114 , and the like may be included.

Hereinafter, the above-described components will be described in detail.

First, the first fastening part 110 is a cylindrical or prismatic component in which the first hollow 111 through which the cable C passes is formed in the central part by screwing with the first explosion-proof facility 11 on one side. .

As shown in FIGS. 2 and 6 , the first fastening part 110 has a screw thread formed on the inner peripheral surface of the first hollow 111 to form the first explosion-proof facility 11 , that is, the outer peripheral surface of the hollow pipe. It is possible to achieve a screw connection with the thread formed in the.

In addition, the first fastening part 110, unlike the figure, when a thread is formed on the inner circumferential surface of the pipe, which is the first explosion-proof facility 11, a screw thread is formed on the outer circumferential surface corresponding to this, so that the first explosion-proof facility 11 is It can also be threaded into a pipe.

In addition, at least one fixing hole 112 that is formed through the first fastening part 110 at a right angle or an inclination toward the first hollow 111 from the outside and is screwed with the fixing member 114 may be formed. .

Here, the fixing member 114 is made of a bolt with a head or a hairless bolt, and by pressing and pressing the outer peripheral surface of the pipe, which is the first explosion-proof facility 11, by screwing with the fixing hole 112 to the first fastening part 110. The screw-coupled first explosion-proof equipment 11 is firmly fixed.

At this time, for sealing between the first fastening part 110 and the first explosion-proof facility 11 forming the screw connection, the epoxy (E) is injected through the fixing hole 112 or the screwing gap between them to be filled. have.

The second fastening part 120 is formed to extend from the first fastening part 110 to form a screw connection with the second explosion-proof facility 12 on the other side, and communicates with the first hollow 111 in the central part of the cable (C) The second hollow 121 passing through is a cylindrical or prismatic component.

As shown in FIGS. 2 and 6, the second fastening part 120 has a screw thread formed on the outer circumferential surface forming the second hollow 121, so that the second explosion-proof facility 12, that is, on the inner circumferential surface of the terminal box. It is possible to achieve screwing with the formed thread.

In addition, the second fastening part 120, unlike the figure, when a screw thread is formed on the outer peripheral surface of the terminal terminal box, which is the second explosion-proof facility 12, a screw thread is formed on the inner peripheral surface corresponding to the second explosion-proof facility (12) It is also possible to form a screw connection with an in-terminal terminal box.

As above, the second fastening part 120 having a thread on the inner circumferential surface is formed through a right angle or an inclination toward the second hollow 121 from the outside, similar to the first fastening part 110 , and the fixing member 114 and the screw At least one fixing hole (not shown) to be coupled may be formed.

At this time, the fixing member (not shown) is also made of a bolt with a head or a hairless bolt, and by pressing and pressing the outer peripheral surface of the terminal box, which is the second explosion-proof facility 12, by screwing with a fixing hole (not shown), the second fastening part The second explosion-proof equipment 12 screwed to 120 is firmly fixed.

For sealing between the second fastening part 120 and the second explosion-proof facility 12, which are screwed together in this way, the epoxy (E) may be injected and filled through a fixing hole (not shown) or a screwing gap between them as well. of course there is

The connection part 130 is described above to provide a space in which a shielding material 142 to be described later is injected from the outside to firmly fix the cable C passing through and seal between the first and second hollows 111 and 121. It is a cylindrical or prismatic component provided between the first and second fastening parts 110 and 120 .

As shown in Figs. 2 and 6, the connecting portion 130 has a third hollow 131 through which the cable C passes through communication with the first and second hollows 111 and 121, respectively, forming a step 131a. ) is formed in the central portion, and at least one inlet 132 through which the outside and the third hollow 131 communicate with each other may be formed through the outer circumferential surface of the connecting portion 130 .

At this time, as shown in FIG. 2 , the third hollow 131 is made to have a smaller diameter in cross-section than the first and second hollows 111 and 121 so that the first and second hollows 111 and 121 and the step 131a, respectively, are formed. will form

This step 131a precisely regulates the insertion depth of the first and second sealing parts 150 and 160, which will be described later, and allows a small amount of the shielding material 142 to be filled in the third hollow 131, after which the first hollow ( 111) or to be easily removed through the second hollow 121.

Conversely, as shown in FIG. 2 , the third hollow 131 is manufactured to have a larger diameter in cross section than the first and second hollows 111 and 121 to form a step 131a with the first and second hollows 111 and 121 . Also, this is to allow the third hollow 131 to be filled with a large number of shielding materials 142 according to the required explosion-proof performance.

On the other hand, on a part of the inner circumferential surface of the connection part 130 forming the third hollow 131, irregularities 134 for preventing the separation of the filled shielding material 142 as described below are shown in FIGS. Likewise, it may be repeatedly formed along the longitudinal direction of the cable (C).

The shielding material 142, which is hardened while forming a bonding force over a large area with the structure of the irregularities 134, has irregularities 134 despite the high-pressure explosion pressure transmitted from the first explosion-proof facility 11 or the second explosion-proof facility 12 side. ) It exhibits a more robust pressure resistance performance that does not deviate from the filling position by the restraining force and bonding force of the structure.

The inlet 132 is a component that is closed by screwing with the finishing member 144 to be described later by forming a right angle or an inclination toward the third hollow 131 from the outside and having at least one penetrating through it. It is possible to easily inject the shielding material 142 to be described later into the third hollow 131 .

The above-described connection unit 130 and the above-described first coupling unit 110 and second coupling unit 120 may be manufactured as separate parts and then coupled to each other.

However, the connection part 130 according to the present invention and the above-described first coupling part 110 and the second coupling part 120 are for convenience in installation work through the minimization of parts and for minimized sealing of the coupling point. , it will be manufactured as an integrated single part using engineering plastics or metal materials with high heat resistance.

The shielding unit 140 is, as described above, heat or pressure generated in any one of the adjacent first and second explosion-proof facilities 11 and 12 is transmitted to the other through the hollows 111, 121 and 131 through which the cable (C) passes. As a component provided to block a thing, as shown in FIG. 6 and the like, it may be configured to include a shielding material 142 and a finishing member 144 .

Here, the shielding material 142 is a component provided so that the first explosion-proof facility 11 and the second explosion-proof facility 12 are closed independently without communicating with each other, and the inlet 132 of the above-described connection part 130 It may be formed by being selectively injected into the third hollow 131 from the outside and filled through.

The shielding material 142 applicable in the present invention may be high-temperature resistant epoxy (E) or foamed epoxy resin, or a fire-resistant mortar (not shown).

Here, the high temperature resistant epoxy (E) or foamed epoxy resin is a component that is attached and fixed in the third hollow 131 through a curing process or a foaming curing process in a liquid state having viscosity, and is a commercialized product with a high glass transition temperature. However, depending on the installation environment or required explosion-proof performance, various additives such as defoaming agents may be mixed and used.

Due to the use of this high-temperature resistant epoxy (E), even if a fire occurs in any one of the first and second explosion-proof facilities 11 and 12, heat transfer to the other can be effectively blocked, so Structural stability can be guaranteed.

Fire-resisting mortar (not shown) is based on a base of cement kneaded in water, and heat-resistant materials such as clay, silica, xiaote (acidified at abnormally high temperatures), chromium, alumina (neutralized at high temperatures), and chromium magnesia (at high temperatures). basification) may be a composition comprising at least any one of.

This fire-resistant mortar has heat resistance as well as high adhesion without dripping even when injected into the third hollow 131, quick-setting for quick construction, diffusivity and permeability in a direction perpendicular to its own weight due to self-cohesive force. It is preferable to prepare it in the form of a liquid or a gel having a viscosity.

The addition, change, and reinforcement of the properties or properties of the fire-resistant mortar as described above, in consideration of the installation environment of the present invention, the material of the connection part 130, the required explosion-proof performance, etc., the composition content of the mortar, the components of the above-mentioned heat-resistant material, This may be accomplished by variously controlling the type or amount of the additive.

The closing member 144 is provided to close the inlet 132 that communicates the third hollow 131 with the outside air to block the outflow of the filled shielding material 142 and contact between the outside air and the shielding material 142 . is a component

As shown in FIGS. 5 and 6 , the closing member 144 is made of a bolt with a head or a hairless bolt to open or close the third hollow 131 by screwing with the inlet 132 .

The first sealing part 150 is a first explosion-proof facility ( 11) is a component for sealing the third hollow 131 from.

As shown in FIG. 2 , the first sealing part 150 is inserted through the first hollow 111 in a state of being penetrated by the cable C and has one end fixed to the third hollow 131 ( 150a) and the above-described step 131a is extended from one end 150a, is located in the first hollow 111, and is screwed in the first explosion-proof facility 11 with respect to the first fastening part 110. It may be composed of the other end (150b) fixed by pressing.

The second sealing part 160 is a second explosion-proof facility ( 12) is a component for sealing the third hollow 131 from.

As shown in FIGS. 2 and 6 , the second sealing part 160 is inserted through the second hollow 121 in a state of being penetrated by the cable C and is fitted and fixed to the third hollow 131 . One end 160a and one end portion 160a extended from one end portion 160a to be caught by the above-described step 131a, located in the second hollow 121, and screwing of the lock ring 12a to the second fastening portion 120 It may be composed of the other end portion (160b) fixed by pressing.

The first and second sealing parts 150 and 160 described above are elastic materials including at least one of silicone, synthetic rubber, PU (polyurethane), expandable PP (polypropylene), expandable PS (polystyrene), and expandable PVC ((Polyvinylchloride)). By being manufactured and mounted in the first and second hollows 111 and 121, respectively, sealing of the third hollow 131 except for the inlet 132 can be completely achieved.

For this reason, the shielding material 142 injected into the third hollow 131 through the inlet 132 does not flow out from the first and second explosion-proof facilities 11 and 12, but surrounds the cable C in the shielded space and maintains a constant By being sufficiently filled without any gaps in the shape, while firmly fixing the cable (C) penetrating the inside, the space between the first and second explosion-proof facilities 11 and 12 is effectively sealed.

As described above, the shielding structure internal cable fixture 100 according to the present invention is the first and second explosion-proof facilities 11 and 12 through the series of processes shown in FIGS. 3 to 6, that is, between the pipe and the terminal box. can be installed on

That is, as shown in FIG. 3 , the operator first has the first sealing part 150 , the first fastening part 110 , the connection part 130 , the cable C passing through the inside of the first explosion-proof facility 11 . The operation of locating the cable fixture 100 according to the present invention between the first and second explosion-proof facilities 11 and 12 that are opened after passing through the second fastening part 120 and the second sealing part 160 in order will perform

And the operator performs the operation of rotating the cable fixture 100 so that the screw coupling between the first fastening part 110 and the first explosion-proof facility 11 is made to the first fastening part 110 to the first explosion-proof facility 11 . ) is fixed.

At this time, the other end 150b of the first sealing part 150 is pressed by the screw coupling between the first fastening part 110 and the first explosion-proof facility 11 and is press-fixed to the first hollow 111, so that the first 1 The third hollow 131 on the side of the explosion-proof facility 11 can be tightly sealed.

Next, as shown in FIG. 4, the operator positions the second fastening part 120 to be fitted inside the second explosion-proof facility 12 (①), and then, the second fastening part 120 and the lock ring 12a. ) to perform the operation (②) of rotating the lock ring 12a so that the screw coupling between them is made, thereby fixing the second fastening part 120 to the second explosion-proof facility 12 .

At this time, the second end portion 160b of the second sealing portion 160 is pressed by the screw coupling between the second fastening portion 120 and the lock ring 12a and is press-fixed to the second hollow 121, so that the second explosion-proof The third hollow 131 on the side of the equipment 12 can be tightly sealed.

And the worker injects a small amount of high-temperature resistant epoxy (E) through the fixing hole 112 formed in the first fastening part 110 for sealing between the first fastening part 110 and the first explosion-proof facility 11 . Then, by rotating the fixing member 114 so that the screw coupling between the fixing hole 112 and the fixing member 114 formed in the first fastening part 110 is made, the first physical part is further provided to the first explosion-proof facility 11 . It will be firmly fixed (③).

Next, as shown in FIG. 5 , the operator enters the third hollow 131 tightly sealed by the first and second sealing parts 150 and 160 , a shielding material 142 such as high temperature resistant epoxy (E). The operation of injecting the shielding material 142 through the inlet 132 to be filled is performed.

Finally, the worker rotates the closing member 144 so that the screw connection between the inlet 132 and the closing member 144 formed in the connection part 130 is made, as shown in FIG. 6 , and the filled shielding material 142 of the external leakage, as well as performing an operation to block the contact between the shielding material 142 and the outside air.

At this time, the filling shielding material 142 is put in a capacity larger than the volume of the third hollow 131 sealed by the first and second sealing parts 150 and 160 and is pressed according to the rotation of the closing member 144 while being pressed into the inlet. It may be desirable to allow a small amount to flow out through 132.

The reason why the amount of the shielding material 142 is increased is so that the shielding material 142 is densely filled without forming gaps or voids inside the third hollow 131 .

When the final installation of the cable fixture 100 according to the present invention is completed between the first and second explosion-proof facilities 11 and 12 by the installation process described above, the cable C wired inside the explosion-proof facility 10 flows It can be fixed in a sealed state with the outside air without damage by It can be easily installed and replaced.

In the foregoing, specific embodiments of the present invention have been described and illustrated, but it is common knowledge in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. It is self-evident to those who have Accordingly, such modifications or variations should not be individually understood from the spirit or point of view of the present invention, and modified embodiments should be said to belong to the claims of the present invention.

C: Cable 10: Explosion-Proof Equipment
11: 1st explosion-proof facility (pipe) 12: 2nd explosion-proof facility (terminal box)
12a: lock ring 13: electric junction box
14: explosion-proof light
100: shield structure internal type cable fixture
110: first fastening part 111: first hollow
112: fixing hole 114: fixing member
120: second fastening part 121: second hollow
130: connection part 131: third hollow
131a: step 132: inlet
134: uneven 140: shielding part
142: shielding material E: epoxy
144: closing member 150: first sealing part
150a: one end 150b: the other end
160: second sealing portion 160a: one end
160b: the other end

Claims (7)

A cable fixture that prevents external exposure and damage of electric cables and fixes the cables to explosion-proof facilities in a sealed state,
A first fastening part screwed with the first explosion-proof facility on one side and having a first hollow through which the cable passes in the central part;
a second fastening part extending from the first fastening part to form a screw connection with a second explosion-proof facility on the other side, and having a second hollow communicating with the first hollow in the central part through which the cable passes;
A third hollow provided between the first and second fastening parts and communicated with each of the first and second hollows at a step in the central part through which the cable passes, and an inlet for communicating the outside and the third hollow with each other penetrates formed connection; and
Including a shielding part composed of a shielding material selectively filled in the third hollow from the outside through the inlet, and a closing member for closing the inlet,
A cable fixture with a shield structure that blocks heat or pressure transfer between the first and second explosion-proof facilities. According to claim 1,
The cable fixture is
It is inserted through the first hollow in a state penetrated by the cable, one end is fixed to the third hollow, and the other end is press-fixed by the screw coupling of the first explosion-proof facility to the first fastening portion. Shielding structure internal cable fixture, characterized in that it further comprises a first sealing portion of the elastic material. 3. The method of claim 2,
The cable fixture is
Further comprising a second sealing part of an elastic material inserted through the second hollow in a state penetrated by the cable and having one end fixed to the third hollow,
Shielded structure built-in cable fixture, characterized in that the sealing to the third hollow is made. 4. The method of claim 3,
In a portion of the inner peripheral surface of the connecting portion forming the third hollow,
Shielding structure built-in cable fixture, characterized in that irregularities that prevent separation of the filled shielding material are repeatedly formed along the cable. 4. The method of claim 3,
The shielding material is
A shielding structure internal cable fixture, characterized in that it is a high-temperature resistant epoxy or foamed epoxy that is attached and fixed in the third hollow through a curing process in a liquid state having viscosity. 4. The method of claim 3,
The shielding material is
A cable fixture with a shielding structure, characterized in that it is a fire-resistant mortar containing at least any one of heat-resistant materials such as clay, silica, xiaote, chromium, alumina, and chromium magnesia in a base kneaded with cement. 4. The method of claim 3,
At least one of the first fastening part and the second fastening part,
A fixing member penetrating through at least one of the first fastening part and the second fastening part and fixing the first and second explosion-proof facilities in a screwed state is further provided,
Between the first fastening part and the first explosion-proof facility forming a screw connection, and between the second fastening part and the second explosion-proof facility, an epoxy for sealing is filled.

Images