KR102582477B1 - Integrated explosion-proof sealing fitting device and its installation method - Google Patents

Abstract

The present invention relates to an integrated explosion-proof sealing fitting device that integrates a vertical type, a vertical drain type, and a horizontal type, as well as a sealing fitting and a connection fitting, and is implemented as an integrated device, and to an installation method thereof. The integrated sealing fitting device of the present invention has a through hole formed inside so that the cable can pass through in a straight line, a first hole is formed at a right angle to the cable penetration direction, and a seal body has a second hole formed at an angle to the cable penetration direction. A seal bushing, which has a through hole for passing a cable inside, one end of which is fitted to one side of the seal body and the other end of which is inserted into an explosion-proof enclosure, and a seal packing to seal the joint between the seal body and the seal bushing. , It includes a seal nut for fastening the seal bushing to the seal body, and further includes a blind plug fastened to the first hole to block the first hole, and a drain plug fastened to the second hole to block the second hole. You can.

Description

Integrated explosion-proof sealing fitting device and its installation method}

The present invention relates to an explosion-proof sealing fitting device and installation method, and more specifically, to an explosion-proof sealing fitting device that integrates a vertical type, a vertical drain type, and a horizontal type, and combines a sealing fitting and a connection fitting into one piece, and the same. It's about installation method.

In general, explosion-proof (anti-explosion) of electrical equipment (equipment) is caused by electrical appliances used in hazardous areas such as oil refineries, petrochemical plants, and gas manufacturing plants, causing flammable gases or explosions. This is to prevent explosions caused by ignition or ignition of vapor or dust.

In order for a fire explosion to occur due to electrical equipment, a hazardous atmosphere and an ignition source must coexist. Preventing this condition from being established is the basis of explosion protection. To this end, the probability of a hazardous atmosphere being created and the probability of electrical equipment becoming an ignition source are The product must be 0.

In general, a place where flammable or combustible substances exist or are likely to exist in the atmosphere at a concentration that can cause a fire or explosion is called an explosion-proof area. This explosion-proof area is divided into a gas explosion-proof area and a dust explosion-proof area and is a place where a hazardous atmosphere exists. The type is determined based on time and frequency. The purpose of classifying explosion-proof areas is to install corresponding electrical equipment according to the risk level of the area. Electrical equipment used in explosion-proof areas must meet certain explosion-proof standards, and gas explosion-proof areas must meet the conditions of a hazardous atmosphere. Accordingly, it is divided into a type 0 location with a continuous hazardous atmosphere, a type 1 location with an intermittent hazardous atmosphere under normal conditions, and a type 2 location with a hazardous atmosphere under abnormal conditions.

As such, explosion-proof structures of electrical devices used in hazardous areas include pressure-resistant explosion-proof structures, intrinsically safe explosion-proof structures, and pressure explosion-proof structures.

Flame-proof (d) is a completely enclosed structure that ensures that the container can withstand the pressure when an explosive gas or vapor explodes inside the container and that electrical equipment is not ignited through joint surfaces or openings. It was protected by putting it in a special container. These pressure-resistant explosion-proof devices adopt a pressure-resistant sealed structure so that even if sparks or internal explosions occur due to external physical influences on the power supply or internal physical or electrical abnormalities, the effects do not reach or be transmitted to the outside.

Therefore, when connecting a cable that supplies power to the power supply inside an explosion-proof device, the valve to be attached or detached from the explosion-proof device must withstand a certain explosion pressure and be moisture resistant at the same time due to the function of the explosion-proof device, and must be equipped with an explosion-proof sealing fitting. It must be easy to attach and detach from explosion-proof equipment. Here, 'Explosion-proof Sealing Fitting' refers to a seal installed in a wire conduit to prevent explosive gas from flowing or the flame of an explosion from being transmitted from one part of explosion-proof electrical equipment to another part in pressure explosion-proof metal pipe construction. refers to a device for use.

'Explosion-proof sealing fitting', which was announced in the Registered Patent Gazette of the Korean Intellectual Property Office under registration number 10-0989739, is tightly coupled to the lower side of the locking protrusion of the valve housing with a hollow cylindrical inlet formed, and has a cable through hole in the center. It consists of a sealing damper that is formed of an elastic material to maintain airtightness between the valve housing and the cable, and a mounting ring that is fastened to the tube joint and supports the lower side of the sealing damper so that the sealing damper is in close contact with the locking jaw. Due to its structure, the explosion-proof sealing fitting of this registered patent can only be used in a structure in which pipes are arranged vertically, and has a problem in that it is difficult to use in a horizontal pipe structure.

Conventional explosion-proof sealing fittings are manufactured in vertical type, vertical drain type, and horizontal type used in vertical electrical conduits, so different types of explosion-proof sealing fittings must be used depending on the electrical conduit structure in the field. Therefore, there is a problem in that the work is inconvenient and the production cost also increases.

In addition, conventionally, in order to connect an explosion-proof sealing fitting to an explosion-proof enclosure, it has been stipulated that a connection fitting must be used. However, there is a problem in that it is difficult to use a connection fitting to satisfy the current explosion-proof installation regulations.

The present invention was proposed to solve the above problems, and the first problem to be solved by the present invention is an integrated explosion-proof sealing fitting device implemented in an integrated form by integrating vertical type, vertical drain type, and horizontal type, and a method of installing the same. is to provide.

The second problem to be solved by the present invention is to provide an integrated explosion-proof sealing fitting device and an installation method that can meet the current explosion-proof installation regulations by combining the sealing fitting and the connection fitting into one piece.

An embodiment of the present invention discloses an integrated explosion-proof sealing fitting device that integrates a vertical type, a vertical drain type, and a horizontal type, and combines a sealing fitting and a connection fitting into one piece.

The integrated explosion-proof fitting device of the disclosed embodiment is a room in which a through hole is formed inside so that the cable can pass through in a straight line, a first hole is formed at a right angle to the cable penetration direction, and a second hole is formed at an angle to the cable penetration direction. A body, a seal bushing with one end fitted to one side of the seal body and the other end inserted into an explosion-proof enclosure, a seal packing for sealing the joint between the seal body and the seal bushing, and the seal bushing connected to the seal body and the seal bushing. Includes a seal nut for fastening and securing.

The integrated explosion-proof sealing fitting device may further include a blind plug fastened to the first hole to block the first hole, and a drain plug fastened to the second hole to block the second hole.

Another embodiment of the present invention also discloses a method of installing an integrated explosion-proof sealing fitting device.

The integrated explosion-proof fitting installation method of another disclosed embodiment includes the steps of inserting seal packing into a through hole on one side of the seal body and inserting a seal bushing to couple the seal body and the seal bushing, and screwing a seal nut to the seal body to connect the seal body and the seal bushing. A step of fixing the combination of the seal bushing, a step of fastening the seal bushing with an O-ring inserted into the hole of the explosion-proof enclosure, a step of passing the cable through the through hole of the seal body, and a step of laying the cable, and installing the seal after laying the cable. It includes forming a fiber dam on a portion of the inside of the body, and sealing the inside of the seal body by injecting a sealing compound into the space formed by the fiber dam and the seal body.

The integrated explosion-proof sealing fitting device according to an embodiment of the present invention can be used as a vertical type, vertical drain type, and horizontal type as a single device depending on the conditions of the installation site, so transportation and installation work is convenient, and only one integrated type can be manufactured. Therefore, it has the advantage of reducing overall production costs.

In addition, the integrated explosion-proof sealing fitting device according to an embodiment of the present invention has the advantage of being able to be used in compliance with current explosion-proof installation regulations by combining the sealing fitting and the connection fitting into one piece. That is, conventionally, both sides of the sealing fitting have female threads so that a connection fitting is used. However, in the embodiment of the present invention, one side has a female thread and the other side has a male thread that serves as a connection fitting, so current explosion-proof installation regulations. You can work more easily.

1 is an exploded view of an integrated explosion-proof sealing fitting device according to an embodiment of the present invention;
Figure 2 is a combined diagram of an integrated explosion-proof sealing fitting device according to an embodiment of the present invention;
3 is a diagram showing an example of a seal body used in an embodiment of the present invention;
4 is a diagram showing an example of a seal bushing used in an embodiment of the present invention;
5 is a diagram showing an example of a seal nut used in an embodiment of the present invention;
6 is a diagram showing an example of a blind plug used in an embodiment of the present invention;
7 is a diagram showing an example of a drain plug used in an embodiment of the present invention;
Figure 8 is a horizontal use state diagram of the integrated explosion-proof sealing fitting according to an embodiment of the present invention;
Figure 9 is a vertical use state diagram of the integrated explosion-proof sealing fitting according to an embodiment of the present invention;
Figure 10 is a vertical drain type use state diagram of the integrated explosion-proof sealing fitting according to an embodiment of the present invention.

The technical problems achieved by the present invention and its implementation will become clearer through preferred embodiments of the present invention described below. The following examples are merely illustrative for illustrating the present invention and are not intended to limit the scope of the present invention.

Figure 1 is an exploded view of an integrated explosion-proof sealing fitting device according to an embodiment of the present invention, and Figure 2 is a combined view of an integrated explosion-proof sealing fitting device according to an embodiment of the present invention.

As shown in Figures 1 and 2, the integrated explosion-proof sealing fitting device 100 according to an embodiment of the present invention has a through hole formed therein so that a cable (not shown) can pass through in a straight line, and the penetration of the cable A seal body 110 in which a first hole 113 is formed perpendicular to the direction and a second hole 114 is formed at an angle to the penetration direction of the cable, and a through hole is formed inside, and one side of the seal body 110 A seal bushing 120, one end of which is fitted and the other end of which is inserted into the explosion-proof enclosure 200, a seal nut 130 for screwing and fixing the seal bushing 120 to the seal body 110, and a seal body. A seal packing 140 for sealing the joint between the seal bushing 120 and the seal bushing 120, an O-ring 150 fitted into the seal bushing 120, and a first hole 113 are screwed into the first hole 113. It consists of a blind plug (160 in FIG. 6) for sealing the hole 113, and a drain plug (170 in FIG. 7) that is screwed to the second hole 114 and seals the second hole 114.

Referring to Figures 1 and 2, the seal body (110) is shaped like a tube with a through hole formed inside so that the cable can pass through in a straight line. One side of the through hole has a female thread (111a) formed on the inner peripheral surface. It serves as a cable inlet 111, and the other side of the through hole serves as a cable outlet 112 with a male thread 112a formed on the outer peripheral surface. Here, the cable outlet 112 side where the male thread 112A is formed on the outer peripheral surface can perform a conventional connection fitting function.

Additionally, the seal body 110 has a first hole 113 formed at a right angle to the direction of the through hole, and a second hole 114 formed at an angle of approximately 45° to the direction of the through hole. Preferably, the diameter of the second hole 114 is smaller than the diameter of the first hole 113.

The seal bushing (120) has a through hole formed inside for the cable to pass through and is used to protect the cable at the connection area with the explosion-proof enclosure 200. The seal body insertion part 121 is inserted into the seal body 110. ), a step 122 that serves as a stopper to prevent further insertion into the seal body 110, a seating portion 123 for receiving the O-ring 150, and an explosion-proof enclosure 200. It consists of an enclosure coupling portion 124 that is fitted.

The seal body 110 and seal bushing 120 configured in this way are seated on the protrusion 112b by inserting the seal packing 140 through the outlet 112 of the seal body, and inserting the seal bushing 120 into the outlet 112. ) so that the protrusion 112b of the seal body and the end of the seal bushing 120 are tightly coupled with the seal packing 140 in between. Then, the male thread 112a formed on the outer peripheral surface of the outlet 112 of the seal body 110 and the female thread formed on the inner peripheral surface of the seal nut 130 are screwed to tightly secure the coupling between the seal body 110 and the seal bushing 120. and combined as shown in Figure 2.

Figure 3 is a view showing an example of the seal body 110 used in an embodiment of the present invention, (a) is a top view, (b) is a side cross-sectional view, (c) is a side view, and (d) is a front view. , (e) is the other side view.

As shown in the detailed view of FIG. 3, the seal body 110 is formed with a through hole for the cable to pass through in a straight line, and one side of the through hole is an inlet 111 connected to the external pipe, and has an inner hole for screw connection with the external pipe. Female threads (111a) are formed, and the other side is an outlet (112) connected to the bushing, and male threads (112a) are formed, so that it is directly connected to the seal bushing (120) without a separate connection fitting, providing the current explosion-proof protection. Can meet installation regulations. The seal body 110 has an outlet 112 on the other side of the through hole into which the seal bushing 120 is inserted, and a first hole 113 into which the blind plug 160 is fastened in a direction perpendicular to the central axis of the through hole. The second hole 114, into which the drain plug 170 or blind plug 160 is fastened, is formed at an angle of approximately 45 degrees with respect to the central axis of the through hole. At this time, when the integrated explosion-proof sealing fitting device 100 of this embodiment is used as a vertical drain type, the drain plug 170 is fastened to the second hole 114, and when used as a horizontal or vertical type, the blind plug 160 is fastened to the second hole 114. It is concluded.

Figure 4 is a diagram showing an example of the seal bushing 120 used in an embodiment of the present invention, where (a) is a top view and (b) is a partially cut side cross-sectional view.

Referring to FIG. 4, the seal bushing 120 is shaped like a tube with a through hole formed inside, and consists of a seal body insertion part 121, a step 122, a seating part 123, and an enclosure coupling part 124. do. The seal body insertion portion 121 is a part that is inserted into the outlet 112 of the seal body 110, and the step 122 protrudes to prevent further insertion into the seal body 110 and maintains the seal nut 130. It is in close contact with the end portion 132 so that the seal body 110 and the seal bushing 120 can be tightly fastened. An O-ring 150 for sealing the joint portion with the explosion-proof enclosure 200 is inserted into the seating portion 123, and the enclosure coupling portion 124 is a portion that is fitted into the explosion-proof enclosure 200.

Figure 5 is a diagram showing an example of a seal nut 130 used in an embodiment of the present invention, where (a) is a plan view and (b) is a partially cut side cross-sectional view.

Referring to FIG. 5, the seal nut (130) has a female thread formed on the inner peripheral surface, the outer peripheral surface is polygonal, and the end 132 protrudes so that when screwed to the seal body 110, the end 132 is formed. The step 122 of the seal bushing 110 can be pressed and fixed to the seal bushing 110 side.

Figure 6 is a diagram showing an example of a blind plug 160 used in an embodiment of the present invention, where (a) is a partially cut side cross-sectional view and (b) is a top view.

Referring to FIG. 6, a blind plug (Blind Plug) 160 is a cylindrical plug screwed into the first hole 113 or the second hole 114 of the seal body 110, and the coupling body 162 is formed with a male thread. ) and a head 161 with a polygonal protruding edge, and a hex wrench groove 163 is formed in the center of the head 161 to insert a hex wrench to rotate the coupling body 162. there is.

Figure 7 is a diagram showing an example of a drain plug 170 used in an embodiment of the present invention, where (a) is a partially cut side cross-sectional view and (b) is a top view.

Referring to Figure 7, the drain plug (Drain Plug) 170 is a cylindrical plug screwed to the second hole 114 of the seal body 110, and includes a coupling body 173 with male threads formed, It consists of a support part 172 exposed to the outside of the second hole 114, and a head part 171 with a polygonal edge protruding from the support part 172.

Figure 8 is a horizontal state diagram of the integrated explosion-proof sealing fitting device according to an embodiment of the present invention.

When using the integrated explosion-proof sealing fitting device 100 according to an embodiment of the present invention horizontally, as shown in FIG. 8, the integrated explosion-proof sealing fitting device 100 is fastened in the horizontal direction with respect to the explosion-proof enclosure 200. It is done.

Referring to FIG. 8, first, the seal packing 140 is inserted into a through hole on one side of the seal body 110, and the seal bushing 120 is inserted to couple the seal body 110 and the seal bushing 120. Then, the seal nut 130 is screwed onto the seal body 110 to fix the combination of the seal body 110 and the seal bushing 120, and the seal bushing 120 with the O-ring 150 inserted is placed in an explosion-proof enclosure ( 200) and fasten it by inserting it horizontally into the hole.

Thereafter, the cable is passed through the through hole of the seal body 110 to lay the cable toward the explosion-proof enclosure 200, and after laying the cable, a fiber dam 182 is formed on both sides of the inner side of the seal body 110.

Then, the seal body 184 is injected through the first hole 113 of the seal body 110 to seal the inside of the seal body, and the blind plug 160 is screwed into the first hole 113 to seal the installation. Complete. When installing horizontally, it is desirable to pre-block the second hole 114 with a blind plug 160-2.

When used horizontally in this way, fiber dams 182 are formed on both sides of the seal body 110, and then sealing compound 184 is injected into the interior of the seal body 110 through the first hole 113 to achieve explosion-proof sealing. Achieve

Figure 9 is a vertical use state diagram of the integrated explosion-proof sealing fitting device according to an embodiment of the present invention.

When using the integrated explosion-proof sealing fitting device 100 according to an embodiment of the present invention vertically, as shown in FIG. 9, the integrated explosion-proof sealing fitting device 100 is fastened in the vertical direction with respect to the explosion-proof enclosure 200. It is done.

Referring to FIG. 9, first, the first hole 113 and the second hole 114 of the seal body 110 are blocked with blind plugs 160-1 and 160-2, and then one side of the seal body 110 is penetrated. Insert the seal packing 140 into the ball, and insert the seal bushing 120 to couple the seal body 110 and the seal bushing 120. Then, the seal nut 130 is screwed onto the seal body 110 to fix the combination of the seal body 110 and the seal bushing 120, and the seal bushing 120 with the O-ring 150 inserted is placed in an explosion-proof enclosure ( 200) and fasten by inserting it vertically into the hole.

Thereafter, the cable is passed through the through hole of the seal body 110 to lay the cable toward the explosion-proof enclosure 200, and after laying the cable, a fiber dam (182) is formed on one inner side of the seal body 110.

Then, the sealing compound 184 is injected onto the fiber dam 182 through the opening of the seal bushing 110 to seal the inside of the seal body.

When installing vertically in this way, it is preferable to block the first hole 113 and the second hole 114 of the seal body 110 with blind plugs 160-1 and 160-2 in advance.

Figure 10 is a vertical drain type use state diagram of the integrated explosion-proof sealing fitting device according to an embodiment of the present invention, (a) is a view before adding the sealing compound, and (b) is a view after adding the sealing compound.

When using the integrated explosion-proof sealing fitting device 100 according to an embodiment of the present invention as a vertical drain type, as shown in FIG. 10, the integrated explosion-proof sealing fitting device 100 is installed in the vertical direction with respect to the explosion-proof enclosure 200. Fastening, but installing the drain hose (186) before sealing with sealing compound (184).

Referring to FIG. 10, first, the first hole 113 of the seal body 110 is blocked with the blind plugs 160-1 and 160-2, and then the seal packing 140 is inserted into the through hole on one side of the seal body 110. Insert and insert the seal bushing 120 to couple the seal body 110 and the seal bushing 120. Then, the seal nut 130 is screwed onto the seal body 110 to fix the combination of the seal body 110 and the seal bushing 120, and the seal bushing 120 with the O-ring 150 inserted is placed in an explosion-proof enclosure ( 200) and fasten by inserting it vertically into the hole.

Afterwards, the drain hose 186 is installed to the seal bushing opening through the second hole 114 and the through hole of the seal body 110, and then the second hole 114 and the drain plug 170 are screwed together, The cable is installed toward the explosion-proof enclosure 200 by passing the cable through the through hole of the seal body 110, and after laying the cable, a fiber dam 182 is formed on one side of the inside of the seal body 110.

Then, the sealing compound 184 is injected onto the fiber dam 182 through the opening of the seal bushing 110 to seal the inside of the seal body 110.

In this way, when installing as a vertical drain type, the first hole 113 of the seal body 110 is blocked in advance with a blind plug 160, and a drain hose is installed between the second hole 114 and the opening of the seal bushing 120. After installing (186), the second hole (114) is sealed with the drain plug (170), and the sealing compound (184) is injected onto the fiber dam (182) through the opening of the seal bushing (110) to seal it.

In this way, the integrated explosion-proof sealing fitting device 100 according to an embodiment of the present invention can be used as a vertical type, vertical drain type, and horizontal type as a single device depending on the conditions of the installation site, making installation work convenient. . In addition, in the embodiment of the present invention, one side of the seal body is made of female threads and the other side is made of male threads that serve as a connection fitting, making it easy to work in accordance with current explosion-proof installation regulations.

In the above, the present invention has been described with reference to an embodiment shown in the drawings, but those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom.

100: integrated seal fitting device 110: seal body
120: Seal bushing 130: Seal nut
140: Seal packing 150: O-ring
200: explosion-proof enclosure

Claims (3)

A through hole is formed inside so that the cable can pass through in a straight line, an inlet formed on one side of the through hole and connected to an external pipe, an outlet formed on the other side of the through hole and connected to the bushing, and a through hole on the side of the outlet. A seal body including a protrusion formed on the inner wall, a first hole formed at a right angle to the cable penetration direction, and a second hole formed at an angle to the cable penetration direction;
Seal packing inserted into the through hole so as to be caught on the protrusion;
A seal body insertion part having a through hole formed therein so that the cable can pass through in a straight line, and formed on one side of the through hole and fitted into the outlet of the seal body to adhere closely to the protrusion with the seal packing interposed therebetween; A seal having an enclosure coupling part formed on the other side of the through hole and fitted into the explosion-proof enclosure, a step formed on the outer circumferential surface to prevent further insertion into the seal body, and a seating part formed on the outer circumferential surface to accommodate the O-ring. bushing; and
An integrated explosion-proof sealing fitting device comprising a seal nut for fastening and fixing the seal bushing to the seal body. The method of claim 1, wherein the integrated explosion-proof sealing fitting device
An integrated explosion-proof sealing fitting device further comprising a blind plug screwed into the first hole to block the first hole, and a drain plug screwed into the second hole to block the second hole. delete

Images