KR20220018292A - Replaceable coupler for explosion-proof equipment - Google Patents

Abstract

Disclosed is a replaceable coupler for explosion-proof equipment. The replaceable coupler for explosion-proof equipment according to the present invention includes: a coupling body composed of a plurality of sets for screw coupling with various first explosion-proof facilities arranged on one side to be selectively used as a replacement, and having a central portion through which an electric cable installed along the first explosion-proof equipment passes; a cable fixture configured to fix the cable passing through the inside in a sealed state to the second explosion-proof facility arranged on the other side, and allow a shielding material that blocks heat or pressure transmission between the first and second explosion-proof facilities to be injected from the outside; and a coupling nut part screwed to an outer circumferential surface of the coupling body while being caught on a protrusion of the cable fixture to fix the cable fixture to the coupling body. According to the present invention, the first and second explosion-proof facilities of different shapes and specifications are easily connected while maintaining airtightness without separating the entire explosion-proof facility, so that the convenience of explosion-proof work is improved, the transfer of heat or pressure between the first and second explosion-proof facilities is blocked, the cable leading from the first explosion-proof facility to the second explosion-proof facility is configured to be injected from the outside, so that the convenience of explosion-proof work is improved, and the improvement and diversification of stable explosion-proof performance are achieved.

Description

Exchangeable coupler for explosion-proof equipment {REPLACEABLE COUPLER FOR EXPLOSION-PROOF EQUIPMENT}

The present invention relates to a replaceable coupler for explosion-proof facilities, and more particularly, a replacement for explosion-proof facilities for sealingly connecting and fixing various explosion-proof facilities to each other while protecting electric cables used in explosion-proof facilities from being exposed to the outside It is about expression couplers.

Electrical equipment used in chemical plants, oil refineries, and factories that generate fine dust generates arc discharge, overheating, and sparks that can 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 cable is forced to be safely isolated inside by using an explosion-proof facility with a sealed structure.

In order to more safely block fire or explosion accidents in chemical plants, etc. along with the isolation of these cables, a sealing connector that blocks the transmission of flames or flames at regular intervals is installed in the explosion-proof facilities through which the 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, it is difficult to insert the housing 100 into the sealing bushing 12 in a state where the explosion-proof equipment such as the main body 11 and the fitting 16 are installed without separating the entire installation workability. There is a problem with falling.

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 ), since the sealing operation filling the inside with the filler 5 is performed without a member that regulates the flow of the filler 5 and holds the shape, the filler 5 does not maintain a constant shape and flows as a result, the filler ( 5) surrounds the cable 2, and there is a problem in that both sides cannot be tightly sealed or shielded with respect to the housing 100.

Therefore, there is a need for research and development on explosion-proof facilities that can be easily installed and operated in response to explosion-proof facilities of various standards that have already been installed while improving the deterioration of the explosion-proof performance of these sealing connectors.

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

It is an object of the present invention to connect various explosion-proof facilities such as a protection pipe or an electric junction box that protects cables wired to chemical factories handling substances with high risk of explosion from being exposed to the outside in an airtight connection with each other, and explosion-proof facilities To provide a replaceable coupler for explosion-proof equipment that can secure cables and improve explosion-proof performance by tightly sealing the space through which cables pass by easily filling the selected shielding material from the outside to the inside after connecting them.

The above object is composed of a plurality of sets for screw coupling with various first explosion-proof facilities disposed on one side and is selectively used for replacement, a coupling body through which an electric cable installed along the first explosion-proof facility passes through the central part; a cable fixture configured to fix the cable passing through the inside in a sealed state to a second explosion-proof facility disposed on the other side, and to inject a shielding material for blocking heat or pressure transfer between the first and second explosion-proof facilities from the outside; And it is achieved by a replaceable coupler for explosion-proof equipment, characterized in that it comprises a coupling nut portion screwed to the outer circumferential surface of the coupling body in a state caught on the locking projection of the cable fixture to fix the cable fixture to the coupling body.

The cable fixture may include: a first fastening part in which the locking protrusion is formed along an edge to be in close contact with the coupling body, and a first hollow through which the cable passes; a second fastening part extending from the first fastening part to form a screw coupling with the second explosion-proof facility 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 material that is selectively filled in the third hollow from the outside through the inlet, and a shielding unit composed of a closing member for closing the inlet.

The replaceable coupler for the explosion-proof facility may further include a contact end that is matched with each other and forms a close contact by protruding complementary tree-ring-shaped irregularities from the surface facing the coupling body and the cable fixture.

The above object is composed of a plurality of sets for screw coupling with various first explosion-proof facilities disposed on one side, and is selectively used for replacement, and a coupling body through which an electric cable installed along the first explosion-proof facility passes through the central portion; a cable fixture configured to fix the cable passing through the inside in a sealed state to a second explosion-proof facility disposed on the other side, and to inject a shielding material for blocking heat or pressure transfer between the first and second explosion-proof facilities from the outside; a connection adapter composed of a plurality of sets corresponding to the coupling body, closely attached to the coupling body, coupled to the cable fixture, and passing the cable through a central portion; And it is achieved by a replaceable coupler for explosion-proof equipment, characterized in that it comprises a coupling nut portion screwed to the outer circumferential surface of the coupling body in a state caught on the locking projection of the connection adapter to fix the cable fixture to the coupling body.

The cable fixture may include: a first fastening part screwed to the connection adapter and having a first hollow through which the cable passes; a second fastening part extending from the first fastening part to form a screw coupling with the second explosion-proof facility 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 material that is selectively filled in the third hollow from the outside through the inlet, and a shielding unit composed of a closing member for closing the inlet.

The replaceable coupler for the explosion-proof equipment may further include a contact end that is matched with each other and forms a close contact surface by protruding complementary tree ring-shaped irregularities, respectively, from the surface where the coupling body and the connection adapter face each other.

The first fastening part further includes a fixing member penetrating through the first fastening part and pressurizing and fixing the connection adapter in a screwed state, and between the first fastening part and the connection adapter forming the screwed connection, sealing Epoxy for can be filled.

The cable fixture may include: a first sealing part of an elastic material which is inserted through the first hollow in a state penetrated by the cable and has one end fixed to the third hollow; and 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, so that sealing of the third hollow can be achieved. have.

In order to prevent separation of the filled shielding material, a binding protrusion in the form of a female thread may be formed along the arrangement direction of the cable on a portion of the inner circumferential surface of the connection part forming the third hollow.

The shielding material 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, or a heat-resistant material such as clay, siliceous, or xiaotei, which is a heat-resistant material on a base in which cement is kneaded in water. , It may be a refractory mortar including at least one of chromium, alumina, and chromium magnesia.

According to the present invention, a coupling body composed of a plurality of sets for selective screw coupling with various first explosion-proof facilities, and a cable fixture for fixing cables passing through them in a sealed state to the second explosion-proof facilities are sequentially manufactured. As the coupling nut part is configured to fix the cable fixture and the coupling body to each other from the outside after being installed in the 1,2 explosion-proof facilities, the first and second explosion-proof facilities of different shapes and standards maintain the airtightness without separating the entire explosion-proof facility. And it can be easily connected, so the convenience of explosion-proof work can be improved.

In addition, according to the present invention, while blocking heat or pressure transfer between the first and second explosion-proof facilities, the cable from the first explosion-proof facility to the second explosion-proof facility is firmly fixed inside the coupler without damage in a sealed state with the outside air As various shielding materials are configured to be injected from the outside, the convenience of explosion-proof work is improved, and stable explosion-proof performance can be improved and diversified.

1 is a use state diagram illustrating a state in which a replaceable coupler for an explosion-proof facility according to a first embodiment of the present invention is coupled between a terminal terminal box and a hollow protective pipe connected to an explosion-proof light, which is an explosion-proof facility.
2 is a perspective view and a cross-sectional view of a replaceable coupler for explosion-proof equipment according to a first embodiment of the present invention.
3 is a perspective view and a cross-sectional view of a replaceable coupler for explosion-proof equipment according to a second embodiment of the present invention.
4 is a perspective view and a cross-sectional view of a replaceable coupler for explosion-proof equipment according to a third embodiment of the present invention.
5 is an exploded view showing the coupling relationship of the replaceable coupler for explosion-proof facilities according to the first, second, and third embodiments.
6 to 9 are views showing step-by-step the process of installing the replaceable coupler for explosion-proof equipment according to the first embodiment of the present invention based on the cross-section of the area A in 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 use state diagram showing a state in which a replaceable coupler for an explosion-proof facility according to a first embodiment of the present invention is coupled between a hollow protective pipe connected to an explosion-proof light, which is an explosion-proof facility, and a terminal box, FIG. 2 is a view of the present invention A perspective view and a cross-sectional view of a replaceable coupler for an explosion-proof facility according to a first embodiment, Figure 3 is a perspective view and a cross-sectional view of a replaceable coupler for an explosion-proof facility according to a second embodiment of the present invention, Figure 4 is a third of the present invention It is a perspective view and a cross-sectional view of a replaceable coupler for an explosion-proof facility according to an embodiment, and FIG. 5 is an exploded view showing the coupling relationship of the replaceable coupler for an explosion-proof facility according to the first, second, and third embodiments, and FIGS. It is a view showing step-by-step the process of installing the replaceable coupler for explosion-proof equipment according to the first embodiment of the present invention based on the cross-section for area A of 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 replaceable couplers 200a, 200b, and 200c for explosion-proof facilities according to the present invention are basically the explosion-proof lamp 14 shown in FIG. 1, the explosion-proof light electrical junction box 13, the protection pipe 11, the terminal box 12 ), etc., is a device that connects the explosion-proof facilities 10 of different types and standards to each other in a closed structure.

The present invention is easily connected to each other without completely separating the explosion-proof equipment 10 that requires connection from the installation location, and the heat or pressure transfer between the explosion-proof equipment 10 is blocked, while the wiring in the explosion-proof equipment 10 is By allowing the electric cable (C) to be firmly fixed inside without damage in a sealed state with the outside air, it is possible to simultaneously improve the convenience of explosion-proof work and stable explosion-proof performance.

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 may be the same as the example shown in FIG. 1 to encompass all parts or devices provided for protection.

In order to specifically implement the functions or actions as described above, the replaceable couplers 200a, 200b, 200c for explosion-proof facilities according to the present invention are, as shown in FIGS. 2 to 4, basically a plurality of sets The coupling body 210 made of, the cable fixture 100 made of a plurality of sets, the coupling nut portion 220 and the contact end (230a, 230b) and the like may be configured in the first, second, and third embodiments.

Here, the replaceable couplers 200a and 200c for explosion-proof facilities according to the first and third embodiments are based on the standard or type of both sides of the explosion-proof facility 10 that mediates the connection, and the explosion-proof facility 10 that requires reinforcement of the explosion-proof performance It can be understood that the upper and lower, that is, the position between the coupling body 210 and the cable fixture 100 (implementing the explosion-proof performance through the shielding part 140 to be described later) is changed or deformed.

Hereinafter, each of the above-described components will be described in detail with reference to the drawings.

First, the coupling body 210 is a variety of explosion-proof facilities of different standards, such as the explosion-proof lamp 14 of FIG. 1, the explosion-proof light electrical junction box 13, the protection pipe 11, the terminal box 12, etc. disposed on one side (10) It is a component that is composed of a plurality of sets for screwing between and is selectively used interchangeably.

The coupling body 210 has a first through hole 211 through which an electric cable (C) installed along the first explosion-proof facility 11 passes, as in the first and second embodiments shown in FIGS. 2 and 3 . It may be formed in a cylindrical shape formed in the central portion.

At this time, the outer circumferential surface of the coupling body 210 is provided with a tool fastening portion 214 protruding outwardly to which a work tool such as a spanner is fastened, and the upper end of the outer circumferential surface is provided with a first explosion-proof facility 11 , that is, a hollow protective pipe. A coupling end 212 having a screw thread for screwing with is provided, and a screw thread for screwing with a coupling nut 220 to be described later may be formed at the lower end of the outer circumferential surface.

And on the upper surface of the cable fixture 100 to be described later, and the lower surface of the coupling body 210 facing the same, each complementary annual growth ring-shaped irregularities protrude to match each other and contact end portions 230a and 230b to form a close contact surface. ) may be provided.

The first through hole 211 of the coupling body 210 and the first hollow 111 of the cable fixture 100 due to the contact ends 230a and 230b engaged with each other from both sides as described above are assembled only by simple assembly without separate sealing. It is possible to maintain a certain level of sealing, so that the inflow of moisture or gas from the outside can be effectively blocked.

On the other hand, the coupling body 210 according to the third embodiment is a first through hole 211 through which the electric cable (C) installed along the second explosion-proof facility 12 passes, as shown in FIGS. 4 and 5 . It may be formed in a cylindrical shape formed in the central portion.

And the coupling body 210 according to the third embodiment may have a thread for screw coupling with the explosion-proof facility 10 positioned below, and unlike the first and second embodiments, the tool fastening part 214 ) instead of the coupling nut 220, which will be described later, may be deformed to form a locking protrusion 222 on which it is caught.

As described above, by prefabricating various types of coupling bodies 210 to be applied to explosion-proof facilities 10 of different standards and types, respectively, the operator can perform accurate explosion-proof work on facilities in the field. It can be performed immediately. (See Fig. 5)

The cable fixture 100 is disposed so as to contact the above-described coupling body 210, and the electric cable (C) wired inside the explosion-proof facility 10 is sealed with the outside air without damage due to the flow of the second explosion-proof facility ( 12), and is a component provided to effectively shield heat or pressure transfer between adjacent explosion-proof facilities (10).

Such a cable fixture 100, as shown in FIGS. 2 to 5, may be configured in three types, and the selection or combination location of the shape is the shape and structure of both sides of the explosion-proof facility 10 to be connected, as described above. It may be determined according to the type of the coupling body 210 .

The cable fixture 100 according to the present invention is specifically a first fastening part 110 , a second fastening part 120 , a connecting part 130 , a shielding part 140 , a first sealing part 150 and a second The first and third embodiments including the sealing unit 160 and the second embodiment further including the above-described components, the fixing member 114 and the connecting adapter 170, and the like may be configured.

At this time, when the cable fixture 100 according to the first embodiment aims to improve the stable explosion-proof performance for the second explosion-proof facility 12, according to the third embodiment, the connection part 130 and the shielding part ( The cable fixture 100 in which 140) is disposed can be understood as a structure for promoting stable improvement of explosion-proof performance for the first explosion-proof facility 11 .

First, the first fastening part 110 according to the first and third embodiments, as shown in FIGS. 2, 4 and 5, is in close contact with the above-described coupling body 210 and the cable (C) is The first hollow 111 to pass through is a cylindrical or prismatic component.

Specifically, the fastening unit 110 according to the first embodiment, as shown in FIG. 2, has a locking protrusion 222 formed along the edge of the upper surface to be pulled by the locking protrusion 224 of the coupling nut 220 to be described later. As a result, the structure is firmly attached to the coupling body 210 .

The first fastening part 110 may be configured to be screwed to the explosion-proof facility 10 of different shapes and standards without the coupling body 210 by forming a screw thread on the inner circumferential surface forming the first hollow 111 .

That is, the connection adapter 170 to be described later or, although not shown, may be directly screwed with the first explosion-proof facility 11 such as a pipe having a thread formed on the outer circumferential surface. (See FIGS. 2 and 3 )

On the other hand, in the first fastening part 110 according to the third embodiment, a screw thread for screwing with the coupling nut part 220 is formed on the outer circumferential surface instead of the locking protrusion 220 as in FIG. 4, so that the coupling body 210 can be firmly attached to

On the other hand, on the upper surface (or lower surface) of the first fastening part 110 and the lower surface (or upper surface) of the coupling body 210 facing it, each complementary annual growth ring-shaped unevenness protrudes and matches with each other, Contact ends 230a and 230b forming a contact surface may be provided.

On the other hand, the first fastening part 110 according to the second embodiment, as shown in FIGS. 3 and 5, has a cylindrical or prismatic shape in which the first hollow 111 through which the cable C passes is formed in the central part. As a component, a screw thread may be formed on the inner circumferential surface forming the first hollow 111 to achieve screw coupling with a connection adapter 170 to be described later.

Here, the connection adapter 170 corresponds to the plurality of coupling bodies 210, respectively, as described above in order to mediate the first coupling part 110 according to the second embodiment to be connected to the coupling body 210 described above. It is a cylindrical or prismatic component composed of a plurality of sets.

At this time, the upper surface of the connection adapter 170 on which the locking protrusions 222 are formed along the edge is in close contact with the above-described coupling body 210 , and the lower end of the connection adapter 170 is the cable fixture 100 , that is, the first fastening. The part 110 is screwed together, and the cable C passes through the second through hole 171 of the central part.

Also on the upper surface of the connection adapter 170 and the lower surface of the coupling body 210 facing the same, complementary annual growth ring-shaped irregularities protrude to match each other and contact ends 230a and 230b to form a close contact surface. can be provided.

The first through hole 211 of the coupling body 210 and the second through hole 171 of the connecting adapter 170 due to the contact ends 230a and 230b engaged with each other on both sides as described above can be easily assembled without separate sealing. It is possible to maintain a certain level of sealing, so that the inflow of moisture or gas from the outside can be effectively blocked.

In the first fastening part 110 according to this second embodiment, a fixing hole 112 that is formed through at a right angle or an inclination toward the first hollow 111 from the outside and is screwed with the fixing member 114 is at least One or more may be formed.

Here, the fixing member 114 is made of a bolt with a head or a hairless bolt, and is screwed to the first fastening part 110 by pressing and pressing the outer peripheral surface of the connection adapter 170 by screwing with the fixing hole 112 . The adapter 170 is firmly fixed.

At this time, for sealing between the first fastening part 110 and the connecting adapter 170 forming the screw connection, the epoxy (E) may be injected and filled therebetween through the fixing hole 112 or the screwing gap.

The second fastening part 120 according to the first, second, and third embodiments is formed to extend from the above-described first fastening part 110 and is screwed with the second explosion-proof facility 12 on the other side, and the second fastening part 120 is formed in the central part. It is a cylindrical or prismatic component in communication with the first hollow 111 and the second hollow 121 through which the cable (C) passes.

As shown in FIGS. 2 to 5, 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, the lock ring of the terminal box ( 12a) Alternatively, it is possible to achieve screw coupling with a thread formed on the inner peripheral surface of the terminal box.

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.

At this time, the second fastening part 120 having a screw thread formed 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 is formed with a fixing member (not shown) and At least one fixing hole (not shown) to be screwed may be formed.

The connection part 130 according to the first, second, and third embodiments is provided with a shielding material 142 to be described later that firmly fixes the cable C passing through the interior and seals between the first and second hollows 111 and 121 from the outside. It is a cylindrical or prismatic component provided between the first and second fastening parts 110 and 120 described above in order to provide a space to be injected and filled.

As shown in FIGS. 2 to 4, etc., in the connection part 130, the third hollow 131 through which the cable C passes through communication with the first and second hollows 111 and 121 forming a step 131a, respectively. ) 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, the third hollow 131 is made to have a smaller 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, respectively. do.

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, the third hollow 131 may be 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, This is to allow the third hollow 131 to be filled with a large amount of shielding material 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, a binding protrusion 134 in the form of a female thread for preventing separation or pushing of the filled shielding material 142 as described later is shown in FIG. 2 and 3 may be formed along the arrangement direction of the cable (C) as shown.

The shielding material 142 cured while forming a bonding force in a large area with the binding protrusion 134 is the binding protrusion ( 134), it exhibits a more robust pressure resistance performance that does not deviate from the filling position by the restraining force and bonding force.

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 , the above-described first coupling unit 110 , and the 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 second coupling part 120 provide convenience in installation work through the minimization of parts and minimize sealing work for the coupling point. For this purpose, it can be manufactured as an integrated single part using high heat-resistant engineering plastics or metal materials.

As described above, the shielding unit 140 according to the first, second, and third embodiments allows heat or pressure generated in any one of the adjacent first and second explosion-proof facilities 11 and 12 to pass through the cable (C). As a component provided to block transmission to another through the hollows 111 , 121 , and 131 , as shown in FIG. 9 , 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 do not communicate with each other and are closed independently, and the inlet 132 of the above-described connection part 130 It can be formed by being selectively injected into the third hollow 131 from the outside through the filling.

The shielding material 142 applicable in the present invention may be high-temperature resistant epoxy (E) or foamed epoxy, 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 a commercial product with a high glass transition temperature. However, various additives such as defoaming agents may be mixed and used depending on the installation environment or required explosion-proof performance.

Due to the use of such 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. 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. 2 to 5 , 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 .

On the other hand, in the first sealing part 150 according to the first, second, and third embodiments, the shielding material 142 in a liquid or gel state is filled through the inlet 132 and cured before being filled with the explosion-proof facility 10 on either side. , 12) is a component that seals one side of the third hollow 131 in order to prevent it from flowing out.

As in the first and third embodiments of FIGS. 2 and 4 , the first sealing part 150 is inserted through the first hollow 111 in a state (refer to FIG. 9 ) penetrated by the cable C. It may be composed of one end 150a fitted to the third hollow 131 and the other end 150b extended from one end 150a so as to be caught by the above-described step 131a.

Here, the other end 150b of the first sealing part 150 is located in the first hollow 111 as in the second embodiment of FIG. It is also possible to exhibit more robust explosion-proof performance by being pressurized and fixed by screwing.

The second sealing part 160 according to the first, second, and third embodiments is filled through the inlet 132 and the shielding material 142 in the liquid or gel state before it is cured is the explosion-proof facilities 10 and 11 on the other side. It is a component that seals the other side of the third hollow 131 in order to prevent it from flowing out.

As shown in FIGS. 2 and 4 , the second sealing part 160 is inserted through the second hollow 121 in a state that is penetrated by the cable C (see FIG. 9 ) and the third hollow 131 . ) and one end 160a fitted and fixed to the above-mentioned step 131a, extended from one end 160a, located in the second hollow 121, and a lock ring for the second fastening portion 120 ( 12a) may be composed of the other end portion (160b) which is press-fixed by the screw coupling.

Here, the other end 160b of the second sealing part 160 is also press-fixed by screwing of the lock ring 12a as shown in FIG. 9 , thereby exhibiting more robust sealing and explosion-proof performance.

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 in a liquid state into the third hollow 131 through the inlet 132 does not flow out to the first and second explosion-proof facilities 11 and 12, and in the shielded space, the cable (C) ), by being sufficiently filled and cured without any gaps in a certain shape, firmly fixing the cable (C) penetrating the inside, and effectively sealing between the first and second explosion-proof facilities 11 and 12.

The coupling nut 220 is screwed onto the outer peripheral surface of the coupling body 210 in a state of being caught by the locking protrusion 222 of the first coupling part 110 of the cable fixture 100 or the connection adapter 170 as described above. It is a ring-shaped component that is coupled to fix the cable fixture 100 to the coupling body 210 .

One end of the coupling nut part 220 is formed to protrude inward and a locking jaw 224 caught on the aforementioned locking protrusion 222 is formed, so that the first fastening part 110 or the connection adapter of the cable fixture 100 is formed. 170 can be firmly attached to the coupling body 210 according to the screw coupling of the coupling nut part 220 to the outer peripheral surface of the coupling body 210 (or the first coupling part 120).

The replaceable coupler 200 for explosion-proof facilities according to the present invention as described above, based on the first embodiment, protects the first explosion-proof facility 11 through a series of processes shown in FIGS. 6 to 9 . It may be installed between the pipe and the terminal terminal box, which is the second explosion-proof facility 12 .

First, as shown in Figure 6, the operator allows the cable (C) passing through the inside of the first explosion-proof facility 11 to pass through the first through hole 211 of the coupling body 210, and then 2 The operation of locating the coupling body 210 between the explosion-proof facilities 11 and 12 is performed.

And the operator fastens the spanner to the tool fastening part 214 of the coupling body 210 so that the screw coupling between the coupling end 212 of the coupling body 210 and the first explosion-proof facility 11 is made, and then coupling By performing the operation of rotating the body 210, the coupling body 210 is firmly fixed to the first explosion-proof facility 11 .

At this time, an O-ring may be used for sealing between the coupling end 212 of the coupling body 210 and the first explosion-proof facility 11 .

Next, as shown in Figure 7, the operator, the cable (C) is the first sealing part 150, the first fastening part 110 of the first embodiment, the connecting part 130, the second fastening part 120 ) and the second sealing part 160 are installed to pass through in order.

And the operator performs the operation of rotating the coupling nut part 220 so that the contact end 230b of the first fastening part 110 and the contact end 230a of the coupling body 210 are firmly in close contact with each other. (①) )

And the operator, after the coupling between the first coupling part 110 and the coupling body 210 is made through the coupling nut part 220, the second coupling part 120 of the cable fixture 100 is a second explosion-proof facility (12) The operation of moving the second explosion-proof facility 12 to fit inside is performed. (②)

The first through hole 211 of the coupling body 210 and the first hollow 111 of the first coupling part 110 due to the contact ends 230a and 230b meshed with each other from both sides as described above, even without a separate sealing It is possible to maintain a certain level of airtightness (prevention of ingress of moisture) only by simple assembly, and it is possible to effectively prevent misalignment or separation between the coupling body 210 with respect to the cable fixture 100 even under explosive pressure.

Next, as shown in FIG. 8, the operator performs the operation (①) of rotating the lock ring 12a so that the screw coupling between the second fastening part 120 and the lock ring 12a is made, and the second explosion-proof facility The second fastening part 120 is fixed to (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 operator, through the inlet 132 so that the shielding material 142 such as high-temperature resistant epoxy (E) is filled into the third hollow 131 tightly sealed by the first and second sealing parts 150 and 160 The operation of injecting the shielding material 142 is performed. (②)

And the operator rotates the closing member 144 so that the screw coupling between the inlet 132 and the closing member 144 formed in the connection part 130 is made to the outside of the filled shielding material 142, as well as the shielding material ( 142) and the work of blocking the contact between the outside air is performed.

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 .

On the other hand, for sealing between the first fastening part 110 and the coupling body 210, a small amount of high-temperature resistant epoxy (E) may be injected through the gap of the coupling nut part 220 .

Finally, as shown in FIG. 9, when the replacement coupler 200a for explosion-proof facilities according to the present invention is finally installed between the first and second explosion-proof facilities 11 and 12, and the shielding material 142 is cured, The cable (C) wired inside the explosion-proof facility 10 can be fixed in a sealed state with the outside air without damage due to flow, and heat or pressure transfer between the adjacent explosion-proof facilities 10 can be effectively shielded, and complex It will be possible to easily install and replace between the already installed adjacent explosion-proof facilities (11, 12) without using a sealing means.

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 technical 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 (protection pipe) 12: 2nd explosion-proof facility (terminal box)
12a: lock ring 13: electric junction box
14: explosion-proof light
100: 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: binding projection 140: shielding part
142: shielding material E: epoxy
144: closing member 150: first sealing part
150a, 150b: one end, the other end 160: second sealing portion
160a, 160b: one end, the other end 170: connection adapter
171: second hole
200a, 200b, 200c: replaceable couplers for explosion-proof equipment
210: coupling body 211: first through hole
212: coupling end 214: tool fastening part
220: coupling nut portion 222: locking projection
224: locking jaws 230a, 230b: contact end

Claims (10)

A coupling body consisting of a plurality of sets for screw coupling with various first explosion-proof facilities disposed on one side and selectively used for replacement, through which an electric cable installed along the first explosion-proof facility passes through the central portion;
a cable fixture configured to fix the cable passing through the inside in a sealed state to a second explosion-proof facility disposed on the other side, and to inject a shielding material for blocking heat or pressure transfer between the first and second explosion-proof facilities from the outside; and
Replaceable coupler for explosion-proof equipment, characterized in that it includes a coupling nut portion screwed to the outer circumferential surface of the coupling body in a state caught on the locking projection of the cable fixture to fix the cable fixture to the coupling body. According to claim 1,
The cable fixture is
a first fastening part in which the locking protrusion is formed along an edge to be in close contact with the coupling body, and a first hollow through which the cable passes is formed in a central part;
a second fastening part extending from the first fastening part to form a screw coupling with the second explosion-proof facility, and having a second hollow communicating with the first hollow in a 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
Replacement coupler for explosion-proof equipment, characterized in that it comprises a shielding material that is selectively filled in the third hollow from the outside through the inlet, and a closing member for closing the inlet. According to claim 1,
The replacement coupler for the explosion-proof equipment is,
Replaceable coupler for explosion-proof equipment, characterized in that the coupling body and the cable fixture further include a contact end that is matched with each other by protruding complementary growth ring-shaped irregularities from the surface facing each other and forming a close contact. A coupling body consisting of a plurality of sets for screw coupling with various first explosion-proof facilities disposed on one side and selectively used for replacement, through which an electric cable installed along the first explosion-proof facility passes through the central portion;
a cable fixture configured to fix the cable passing through the inside in a sealed state to a second explosion-proof facility disposed on the other side, and to inject a shielding material for blocking heat or pressure transfer between the first and second explosion-proof facilities from the outside;
a connection adapter composed of a plurality of sets corresponding to the coupling body, closely attached to the coupling body, coupled to the cable fixture, and passing the cable through a central portion; and
Replaceable coupler for explosion-proof equipment, characterized in that it includes a coupling nut portion screwed to the outer circumferential surface of the coupling body in a state of being caught on the locking projection of the connection adapter to fix the cable fixture to the coupling body. 5. The method of claim 4,
The cable fixture is
a first fastening part screwed to the connection adapter and having a first hollow through which the cable passes;
a second fastening part extending from the first fastening part to form a screw coupling with the second explosion-proof facility, and having a second hollow communicating with the first hollow in a 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
Replacement coupler for explosion-proof equipment, characterized in that it comprises a shielding material that is selectively filled in the third hollow from the outside through the inlet, and a closing member for closing the inlet. 5. The method of claim 4,
The replacement coupler for the explosion-proof equipment is,
Replaceable coupler for explosion-proof equipment, characterized in that it further comprises a contact end that is matched with each other by protruding from the surface facing the coupling body and the connection adapter, each complementary to each other, and forming a close contact. 6. The method of claim 5,
In the first fastening part,
A fixing member penetrating through the first fastening part and pressing and fixing the connection adapter in a screwed state is further provided;
A replaceable coupler for explosion-proof equipment, characterized in that an epoxy for sealing is filled between the first fastening part and the connection adapter forming the screw connection. 6. The method according to claim 2 or 5,
The cable fixture is
a first sealing part of an elastic material inserted through the first hollow in a state penetrated by the cable and having one end fixed to the third hollow; and
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,
Replaceable coupler for explosion-proof equipment, characterized in that sealing to the third hollow is made. 6. The method according to claim 2 or 5,
In a portion of the inner peripheral surface of the connecting portion forming the third hollow,
In order to prevent separation of the filled shielding material, a replaceable coupler for explosion-proof equipment, characterized in that a female threaded binding protrusion is formed along the arrangement direction of the cable. 6. The method according to claim 2 or 5,
The shielding material is
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,
A replaceable coupler for explosion-proof equipment, characterized in that it is a fire-resistant mortar containing at least one of the heat-resistant materials such as clay, silica, xiaote, chromium, alumina, and chromium magnesia in a base kneaded with cement.

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