KR20220159628A - 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 and an installing method thereof capable of integrating a vertical type, a vertical drain type, and a horizontal type, and integrally combining sealing fitting and connecting fitting into one. The integrated sealing fitting device of the present invention comprises: a seal body; a seal bushing; a seal packing; and a seal nut. The seal body forms a penetrating hole inside to penetrate a cable in a straight line; forms a first hole at a right angle to a cable penetrating direction; and forms a second hole inclined with the cable penetrating direction. The seal bushing forms the penetrating hole to pass the cable inside; inserts and combines one end with one side of the seal body; and inserts the other end into an explosion-proof enclosure. The seal packing seals a combining unit between the seal body and the seal bushing. The seal nut connects the seal bushing to the seal body. The integrated sealing fitting device further comprises: a blind plug which is connected to a first hole and blocks the first hole; and a drain plug which is connected to a second hole and blocks the second hole.

Description

Integrated explosion-proof sealing fitting device and its installation method {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 particularly, to an explosion-proof sealing fitting device configured as an integral unit by integrating a vertical type, a vertical drain type, and a horizontal type, as well as combining a sealing fitting and a connection fitting into one, and the same It's about how to install.

In general, explosion-proof (anti-explosion) of electrical equipment (equipment) is caused by electrical products used in hazardous areas such as oil refineries, petrochemical plants, and gas manufacturing plants, which cause flammable gases or It is to prevent an explosion accident caused by ignition or ignition of steam or dust.

In order for a fire explosion due to electrical installations to occur, a hazardous atmosphere and an ignition source must coexist, and preventing this condition from being established is the basis of explosion protection. The product must be 0.

In general, a place where inflammable or combustible substances exist or are likely to exist in the atmosphere at a concentration that can cause fire or explosion is called an explosion-proof area, and this explosion-proof area is divided into gas explosion-proof areas and dust explosion-proof areas, Depending on the time and frequency, the species is determined. The purpose of classifying the explosion-proof area is to install electrical equipment corresponding to it according to the risk level of the area. Depending on the location, it is classified into Class 0 place of continuous dangerous atmosphere, Class 1 place of intermittent dangerous atmosphere in normal condition, and Class 2 place of dangerous atmosphere under abnormal condition.

Explosion-proof structures of electric devices used in hazardous areas include pressure-resistant explosion-proof structures, intrinsic safety explosion-proof structures, and pressure explosion-proof structures.

Flame-proof structure (d) is a fully enclosed electrical facility so that the container can withstand the pressure when an explosive gas or vapor explodes inside the container and there is no risk of being ignited by external explosive gas through a joint or opening. It is protected by putting it in a special container of This pressure-resistant explosion-proof device adopts a pressure-resistant sealed structure so that even if sparks or internal explosions occur due to external physical influences or internal physical or electrical abnormalities in the power supply, the effects do not reach and be transmitted to the outside.

Therefore, when connecting a cable that supplies power to the power supply inside the explosion-proof device, the valve to be attached to or detached from the explosion-proof device must withstand a certain explosion pressure and have moisture resistance at the same time due to the function of the explosion-proof device. It must be possible to easily attach and detach from the explosion-proof device. Here, 'Explosion-proof Sealing Fitting' is a seal installed in a conduit line to prevent the flow of explosive gas or the transmission of flames of an explosion from one part of an explosion-proof electrical facility to another in the pressure-resistant explosion-proof metal pipe construction. means a tool

'Explosion-proof sealing fitting' announced as Registration No. 10-0989739 in the Korean Intellectual Property Office Registered Patent Publication is a valve housing in which a hollow cylindrical inlet is formed and closely coupled to the lower side of the locking jaw of the valve housing, and has a cable through hole in the center. It consists of a sealing damper formed of an elastic material to maintain airtightness between the valve housing and the cable, and a mounting ring that supports the lower side of the sealing damper so that the sealing damper is in close contact with the locking jaw while being fastened to the tube coupling part. The explosion-proof sealing fitting of this registered patent can only be used in a structure in which piping is vertically arranged, and it is difficult to use in a horizontal piping structure.

Conventional explosion-proof sealing fittings are manufactured as vertical types, vertical drain types used for vertical conduit lines, and horizontal types used for horizontal conduit lines, so different types of explosion-proof sealing fittings must be used depending on the structure of the conduit line Therefore, there are problems in that the work is inconvenient and the production cost is also increased.

In addition, conventionally, in order to connect an explosion-proof sealing fitting to an explosion-proof enclosure, it is prescribed to use a connection fitting unconditionally, but there is a problem in that it is difficult to use the connection fitting in order to satisfy the current explosion-proof installation regulations.

The present invention has been 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 as an integrated unit by integrating a vertical type, a vertical drain type, and a horizontal type, and an installation method thereof is to provide

A second problem to be solved by the present invention is to provide an integral explosion-proof sealing fitting device and an installation method thereof that can satisfy current explosion-proof installation regulations by integrating a sealing fitting and a connecting fitting into one integral body.

One embodiment of the present invention discloses an integrated explosion-proof sealing fitting device implemented as an integral body by integrating a vertical type, a vertical drain type, and a horizontal type, as well as combining a sealing fitting and a connection fitting into one.

The integrated explosion-proof fitting device of the disclosed embodiment has a through hole formed therein so that a cable can pass through it in a straight line, a first hole is formed at right angles to the cable penetration direction, and a seal in which the second hole is formed obliquely to the cable penetration direction. A body, a seal bushing having 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 a joint between the seal body and the seal bushing, and the seal bushing connected to the seal body. It includes a seal nut for tightening and fixing.

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 discloses a method for installing an integral explosion-proof sealing fitting device.

An integral explosion-proof fitting installation method according to another disclosed embodiment includes the steps of inserting a seal packing into a through hole on one side of a 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 so as to The step of fixing the coupling of the seal bushing, the step of inserting and fastening the seal bushing with the O-ring into the hole of the explosion-proof enclosure, the step of passing the cable through the through-hole of the seal body to lay the cable, and the step of laying the cable after laying the cable. Forming a fiber dam on an inner part of the body, and sealing the inside of the seal body by injecting a sealing compound into a space formed by the fiber dam and the seal body.

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

In addition, the integrated explosion-proof sealing fitting device according to the embodiment of the present invention has the advantage of being able to be used to meet the current explosion-proof installation regulations by combining the sealing fitting and the connection fitting into one body. That is, in the prior art, both sides of the sealing fitting are female threads so that connection fittings are used, but in the embodiment of the present invention, one side is female threads and the other side is male threads serving as connection fittings, so the current explosion-proof installation regulations to work more easily.

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

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

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

As shown in FIGS. 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 it in a straight line, and the cable penetrates. A seal body 110 in which a first hole 113 is formed perpendicularly to the direction and a second hole 114 formed at an angle to the cable penetration direction, and a through hole is formed therein, and one side of the seal body 110 A seal bushing 120 having one end fitted to and the other end 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 the seal body The seal packing 140 for sealing the joint between the seal 110 and the seal bushing 120, the O-ring 150 inserted in the seal bushing 120, and the 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 ) screwed into the second hole 114 to seal the second hole 114 .

1 and 2, the seal body 110 has a tubular shape with a through hole formed therein so that a cable can pass through it in a straight line. It serves as a cable inlet 111, and the other side of the through hole serves as a cable outlet 112 having a male screw 112a formed on its outer circumferential surface. Here, the side of the cable outlet 112 on which the male screw 112A is formed on the outer circumferential surface can perform a conventional connection fitting function.

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

The seal bushing 120 has a through hole formed therein for the cable to pass through and is for protecting the cable at the connection portion with the explosion-proof enclosure 200, and the seal body insertion part 121 inserted into the seal body 110. ), a step 122 serving as a stopper to prevent further insertion into the seal body 110, a seating portion 123 for accommodating the O-ring 150, and an explosion-proof enclosure 200 It is composed of an enclosure coupling portion 124 that is fitted and coupled.

In the seal body 110 and the seal bushing 120 configured as described above, the seal packing 140 is inserted through the outlet 112 of the seal body to be seated on the protrusion 112b, and the seal bushing 120 is inserted into the outlet 112. ), so that the protruding portion 112b of the seal body and the end of the seal bushing 120 are closely coupled with the seal packing 140 interposed therebetween. Then, the male screw 112a formed on the outer circumferential surface of the outlet 112 of the seal body 110 and the female screw formed on the inner circumferential surface of the seal nut 130 are screwed together to tightly fix the coupling between the seal body 110 and the seal bushing 120. and combined as shown in Figure 2.

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

As shown in the detailed view of FIG. 3, the seal body 110 has a through hole through which a cable passes through in a straight line, and one side of the through hole is an inlet 111 connected to an external pipe for threading with an external pipe. Female threads (111a) are formed, and male threads (112a) are formed as an outlet 112 connected to the bushing on the other side, so that it is directly connected to the seal bushing 120 without a separate connection fitting and is currently explosion-proof. Installation regulations can be met. In the seal body 110, the other side of the through hole is the outlet 112 into which the seal bushing 120 is inserted, and the 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 the blind plug 160 is fastened is formed at an angle of about 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 in a vertical drain type, the drain plug 170 is fastened to the second hole 114, and when used in a horizontal or vertical type, the blind plug 160 is concluded

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

Referring to FIG. 4 , the seal bushing 120 has a tubular shape with a through hole formed therein, and is composed 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 part 121 is a part inserted into the outlet 112 of the seal body 110, and the step 122 protrudes to prevent further insertion into the seal body 110 while preventing the seal nut 130 from being inserted into the seal body 110. The seal body 110 and the seal bushing 120 can be tightly coupled by being in close contact with the end 132 . An O-ring 150 for sealing the explosion-proof enclosure 200 and the coupling portion 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.

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

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

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

Referring to FIG. 6 , a blind plug 160 is a cylindrical stopper screwed into the first hole 113 or the second hole 114 of the seal body 110, and a coupling body 162 having a male screw formed thereon. ) and a head portion 161 with a polygonal edge protruding, and a hexagonal wrench groove 163 is formed in the center of the head portion 161 so that a hexagonal wrench can be inserted to rotate the coupling body 162. have.

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

Referring to FIG. 7 , a drain plug 170 is a cylindrical stopper screwed into the second hole 114 of the seal body 110, and includes a coupling body 173 having male threads formed thereon, It consists of a support part 172 exposed to the outside of the second hole 114, and a head part 171 whose edge protrudes in a polygonal shape from the support part 172.

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

When the integrated explosion-proof sealing fitting device 100 according to the embodiment of the present invention is used in a horizontal type, as shown in FIG. is to do

Referring to FIG. 8 , first, the seal packing 140 is inserted into the through hole on one side of the seal body 110, and the seal body 110 and the seal bushing 120 are coupled by inserting the seal bushing 120. Next, the seal nut 130 is screwed into the seal body 110 to fix the coupling between the seal body 110 and the seal bushing 120, and the seal bushing 120 into which the O-ring 150 is fitted is placed in an explosion-proof enclosure ( 200) in the horizontal direction and fasten.

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 the cable is laid, the fiber dam 182 is formed on both sides of the inner side of the seal body 110.

In addition, the sealing compound 184 is introduced 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 in a horizontal type, it is preferable to block the second hole 114 with a blind plug 160-2 before installing.

In this way, when used in a horizontal type, after forming the fiber dam 182 on both sides of the seal body 110, the sealing compound 184 is injected into the inside of the seal body 110 through the first hole 113 to achieve explosion-proof sealing to achieve

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

When the integral explosion-proof sealing fitting device 100 according to the embodiment of the present invention is used vertically, as shown in FIG. 9, the integral explosion-proof sealing fitting device 100 is fastened vertically with respect to the explosion-proof enclosure 200. is to do

Referring to FIG. 9 , first, after blocking the first hole 113 and the second hole 114 of the seal body 110 with blind plugs 160-1 and 160-2, one side of the seal body 110 is penetrated. The seal packing 140 is inserted into the ball, and the seal body 110 and the seal bushing 120 are coupled by inserting the seal bushing 120 therein. Next, the seal nut 130 is screwed into the seal body 110 to fix the coupling between the seal body 110 and the seal bushing 120, and the seal bushing 120 into which the O-ring 150 is fitted is placed in an explosion-proof enclosure ( 200) into the hole in the vertical direction.

Thereafter, cables are passed through the through-hole of the seal body 110 to lay the cables toward the explosion-proof enclosure 200, and after laying the cables, 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.

In this vertical installation, 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 beforehand.

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

When the integrated explosion-proof sealing fitting device 100 according to the embodiment of the present invention is used as a vertical drain type, as shown in FIG. It is fastened, but the drain hose 186 is installed before sealing with the sealing compound 184.

Referring to FIG. 10 , first, the first hole 113 of the seal body 110 is blocked with blind plugs 160-1 and 160-2, and then a seal packing 140 is inserted into a through hole on one side of the seal body 110. is inserted, and the seal body 110 and the seal bushing 120 are coupled by inserting the seal bushing 120 . Next, the seal nut 130 is screwed into the seal body 110 to fix the coupling between the seal body 110 and the seal bushing 120, and the seal bushing 120 into which the O-ring 150 is fitted is placed in an explosion-proof enclosure ( 200) into the hole in the vertical direction.

Thereafter, the drain hose 186 is installed toward the opening of the seal bushing 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, A 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 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 .

When installing in the vertical drain type as described above, the first hole 113 of the seal body 110 is blocked in advance with the blind plug 160, and a drain hose is placed 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 put on the fiber dam 182 through the opening of the seal bushing 110 to seal it.

As such, the integrated explosion-proof sealing fitting device 100 according to the embodiment of the present invention can be used as a single device in a vertical type, a vertical drain type, and a horizontal type according to the conditions of the installation site, so that the installation work is convenient. . In addition, in the embodiment of the present invention, one side of the seal body is made of a female screw and the other side is made of a male screw serving as a connection fitting, so that it can easily work in accordance with current explosion-proof installation regulations.

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

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

Claims (3)

a seal body having a through hole formed therein so that a cable can pass through in a straight line, a first hole formed perpendicularly to the cable penetration direction, and a second hole formed obliquely to the cable penetration direction;
A seal bushing having a through hole through which a cable passes, one end of which is fitted to one side of the seal body and the other end is inserted into an explosion-proof enclosure;
a seal packing for sealing a joint between the seal body and the seal bushing; and
An integral explosion-proof sealing fitting device including a seal nut for fastening and fixing the seal bushing to the seal body. The method of claim 1, wherein the integral 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. inserting a 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;
fixing the coupling between the seal body and the seal bushing by screwing a seal nut to the seal body;
Inserting and fastening the seal bushing into which the O-ring is inserted into the hole of the explosion-proof enclosure;
laying the cable by passing the cable through the through hole of the seal body;
Forming a fiber dam on an inner part of the seal body after cable laying; and
A method of installing an integral explosion-proof sealing fitting, comprising the step of sealing the inside of the seal body by injecting a sealing compound into the space formed by the fiber dam and the seal body.

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