KR101503705B1 - Explosion apparatus for positive pressure - Google Patents

Abstract

Disclosed is a positive pressure explosion apparatus. According to an embodiment of the present invention, the positive pressure explosion apparatus comprises: a main body unit having a space wherein an explosion object is stored; a compressed gas conversion unit located inside the main body unit, maintaining an inner space of the main body unit at positive pressure by converting an explosion gas to protect the explosion object into compressed gas; a compressed gas supply pipe supplying the compressed gas compressed in the compressed gas conversion unit to the space of the main body unit; a compressed gas manifold branched off from the compressed gas conversion unit to independently supply the compressed gas to the explosion object; and an air introduction unit to supply air to the compressed air conversion unit.

Description

Explosion apparatus for positive pressure

More particularly, the present invention relates to a positive-pressure explosion-proof device capable of explosion-proofing an explosion-proof object by directly introducing outside air into a purge gas of a pressure-explosion-proof panel .

Generally, in the fields such as petrochemical, gas, heavy industrial equipment, oil refinery and storage, many hazardous materials are handled in various processes, and there are risks such as explosion fire or gas poisoning. In addition, explosion of such a site is a residential area in a factory and surrounding areas, and fire can spread and lead to a major accident. Therefore, most of the cases installed in a manufacturing factory have an explosion-proof structure.

For example, cases with an explosion-proof structure are classified according to the type, such as a frame proof type, an oil immersed type, a pressurized type, an increased safety type, And an explosion-proof structure having various structures such as a structure is used.

The explosion-proof case is composed of a mechanical element and a PCB substrate with electrical and electronic components, and an electrical connection part for electrically connecting them. The case is stable in pressure even if explosive gas or electrical appliance is exploded due to flame, arc or high temperature Pressure explosion-proof structure that is designed to withstand the explosion test so that the explosive vapor can not be ignited through the joint surface or the opening.

Also, it is preferable that the external pressure explosion-proof case has a structure in which one or two elements of the explosion (flammable material, air, ignition source) are removed so that the explosion does not occur.

Korea Public Utility Model No. 20-2009-0008441 (Published on August 21, 2009)

Embodiments of the present invention provide a positive pressure type explosion device in which a compressor is placed in a main body for stably using various industries equipped with an explosion-proof object, and outdoor air is directly introduced into the main body to use as an explosion-proof gas.

According to an aspect of the present invention, there is provided an explosion-proof object comprising: a body portion in which a space for storing an explosion-proof object is formed; A compressed gas switching unit located inside the main body and converting the explosion-proof gas for protecting the explosion-proof object into a compressed gas to maintain the internal space of the main body in a positive pressure state; A compressed gas supply pipe for supplying the compressed gas compressed by the compressed gas switching unit to the space of the main body part; A compressed gas distribution branch branched by the compressed gas switching section and independently supplied to the explosion-proof object; And an outside air introduction portion for supplying outside air to the compressed gas switching portion.

The positive pressure explosion-proof apparatus includes an explosion-proof case in which the explosion-proof object is independently embedded.

The explosion-proof case includes an inner case on which the explosion-proof object is seated; An outer case surrounding the inner case; And a door provided on one surface of the outer case and having a check window for visually recognizing the presence or absence of an abnormality of the explosion-proof object.

And the compressed gas switching unit is protected by a protective cover that covers the outside.

And the outside air introduction portion is supplied with air to be compressed through the branch duct branched from the air conditioning duct of the building in which the positive pressure explosion-proof device is installed, to the compressed gas switching portion.

The outside air introduction portion includes a filter portion mounted on the branch duct and filtering foreign substances contained in the outside air.

The positive pressure explosion-proof apparatus includes a first sensing unit for sensing the presence or absence of a combustible gas contained in the outside air passed through the filter unit.

Wherein the outside air introduction portion includes a suction portion for directly sucking outside air of a place where the positive pressure type explosion device is installed; And a supply pipe for supplying outside air sucked by the suction unit to the compressed gas switching unit.

The positive pressure explosion-proof apparatus includes a second sensing unit for sensing the presence or absence of a combustible gas contained in the outside air passing through the supply pipe.

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The positive pressure type explosion device includes an inert gas supply portion for supplying an inert gas to the compressed gas supply pipe.

Wherein the positive pressure type explosion device comprises a first fire extinguishing unit provided in the main body part in a state partially inserted into the explosion-proof case and discharging a fire extinguishing gas when a fire occurs; And a second extinguishing unit provided in the main body separately from the first extinguishing unit and discharging extinguishing gas when a fire occurs in the main body.

According to another aspect of the present invention, there is provided a positive pressure type explosion-proof apparatus comprising: a body portion having a space for storing an explosion-proof object; A compressed gas switching unit located inside the main body and converting the explosion-proof gas for protecting the explosion-proof object into a compressed gas to maintain the internal space of the main body in a positive pressure state; An outside air introduction part for supplying outside air to the compressed gas switching part; A sensing unit sensing the presence or absence of a combustible gas contained in the outside air supplied to the body through the outside air introduction unit; An inert gas supply unit for supplying an inert gas to the main body; And a ratio of an inert gas supplied to the main body through the inert gas supply unit and a ratio of an explosion gas supplied to the main body through the compressed gas switching unit at different ratios, And a control unit for selectively controlling the on / off state of the gas switching unit.

The embodiments of the present invention can reduce the cost by using the explosion-proof gas required for explosion by using the air ventilation duct of the building and forming positive pressure by itself in the pressure explosion-proof container, and minimize the facilities for supplying explosion-proof gas .

Embodiments of the present invention can stably store various explosion-proof objects in a separate space filled with explosion-proof gas to stably prevent ignition conditions due to infiltration of a combustible gas or a combustible gas, thereby preventing economic loss and loss of life due to fire .

The embodiments of the present invention can quickly suppress the fire early to prevent further damage even if a fire occurs in the positive pressure type explosion device.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a configuration of a positive pressure type explosion device according to an embodiment of the present invention; FIG.
2 is a view showing an explosion-proof case according to an embodiment of the present invention.
3 is a view showing a configuration of a positive pressure type explosion device according to another embodiment of the present invention.
4 is a view showing a configuration of a positive pressure type explosion device according to still another embodiment of the present invention.
5 illustrates a configuration associated with a control unit and the control unit according to an embodiment of the present invention.
6 is a use state diagram of a positive pressure type explosion device according to an embodiment of the present invention.

A configuration of a positive pressure explosion-proof apparatus according to an embodiment of the present invention will be described with reference to the drawings.

1 and 2, the positive pressure type explosion-proof apparatus 1 according to the present embodiment includes a main body 100, a compressed gas switching unit 200, and an outside air introduction unit 300.

The body 100 has a space in which the explosion-proof object 10 is stored. The explosion-proof object 10 is exposed to the inner space of the body 100 or exposed to the explosion-proof case 50 independently It can be stored in a built-in state. In the present embodiment, it is described that it is used in a state in which it is embedded independently in the explosion-proof case 50, but it can be changed in some cases.

When the explosion-proof object 10 is embedded in the explosion-proof case 50 independently, it is safely stored from an ignition source such as a fire or a combustible gas, and the inflow of the ignition material into the explosion-proof case 50 is completely blocked. And can be safely stored.

The explosion-proof case 50 includes an inner case 52 on which the explosion-proof object 10 is seated, an outer case 54 surrounding the inner case 52, And a door 56 in which an inspection window 55 is formed so as to visually recognize the presence or absence of an abnormality of the explosion-proof object 10.

The inner case 52 is provided with a fixing member (not shown) for fixing the explosion-proof object 10 and the inner case 52 and the outer case 54 are provided with a door 56, Respectively. It is noted that the inspection window 55 may be made of tempered glass, but other materials may be used that have a function to meet explosion-proof performance.

When the explosion-proof object 10 is stored in the explosion-proof case 50, it is isolated from a fire or a combustible gas and an ignition source. Thus, even if a fire occurs, the object 10 can be safely stored for a certain period of time. It is possible to provide a time for performing the initial digestion immediately.

Since the inner space of the main body 100 is maintained in the positive pressure state after the explosion-proof case 50 is firstly switched to the positive pressure state, the explosion-proof case 50 having a relatively small space can be explosion- (10) can be safely stored.

The compressed gas switching unit 200 switches the explosion-proof gas for protecting the explosion-proof object 10 into a compressed gas form and maintains the internal space of the main body unit in a positive pressure state. A compressor having a capacity is used, and a compressor, which is not installed externally and has a relatively small capacity, is used, so that a positive-pressure explosion-proof device can be constructed with a relatively simple equipment configuration, thereby improving the economical efficiency.

The compressed gas switching unit 200 is protected by a protective cover 210 that surrounds the outer side of the compressed gas switching unit 200. The protective cover 210 minimizes the direct contact between the compressed gas switching unit 200 and the combustible gas Lt; / RTI >

The protective cover 210 is detachably mounted to the compressed gas switching unit 200. A check window for visually recognizing the operating state of the operation of the protective cover 210 can be formed to allow the user to easily grasp the malfunction. The material is also made of flame retardant material or flame retardant plastic so as to minimize the risk of fire.

The outside air introduction part 300 can be selectively used either in a manner that the outside air is supplied to the compressed gas switching part 200 through the air conditioning duct 3 of the building or directly supplied to the main body part 100 This will be described with reference to the drawings.

1, the outside air inlet 300 is connected to the compression gas switching unit 200 through the branch duct 310 branched from the air conditioning duct 3 of the building in which the positive pressure type explosion device 1 is installed, Air is supplied.

The positive pressure explosion-proof device 1 is provided only for the inner region of the main body 100 and the explosion-proof case 50 without using an expensive compressor or equipment having a large capacity in order to provide the explosion-proof gas to the main body 100 in a high- The branch duct 310 is branched from the air-conditioning duct 3, which is generally installed in a building, and is supplied to the compressed gas switching unit 200. [

In this case, the configuration of the compressed gas switching unit 200 is relatively simplified, the overall capacity is reduced, and the operating cost is also lowered, resulting in a cost reduction effect. The branch duct 310 can be extended to a place where the positive-pressure explosion-proof device 1 is installed, and detailed size and specifications are omitted.

The branch duct 310 includes a filter unit 320 for filtering the foreign substances contained in the supply air supplied from the air conditioning duct 3 and the filter unit 320 filters the combustible gas and foreign matter It is preferable to use a filter.

3, the outside air introduction portion 300 includes a suction portion 340 for directly sucking outside air at a place where the positive pressure explosion-proof device 1 is installed, and a suction portion 340 for sucking the outside air sucked in the suction portion 340, And a supply pipe 350 for supplying the gas to the switching unit 200.

The suction unit 340 may be configured to have a suction fan or other structure capable of sucking the outside air. The supply pipe 350 may be of any type, such as a normal pipe type or a duct type, Not limited.

The second sensing unit 2b senses the presence or absence of a combustible gas contained in the outside air at the tip or specific position of the supply pipe 350. The second sensing unit 2b senses the presence or absence of the combustible gas contained in the outside air The combustible gas is stably introduced into the main body 100 or the explosion-proof case 50 via the compressed gas switching unit 200 without straying. If the combustible gas is detected by the second sensing unit 2B, the operation of the compressed gas switching unit 200 is stopped.

As described above, the positive pressure explosion-proof apparatus 1 according to the present embodiment can use a method of supplying the explosion-proof gas to the main body 100 through the air-conditioning duct 3 or introducing the outside air directly. In addition, The inert gas supply unit 40 for supplying the inert gas to the compressed gas supply pipe 20 will be described.

Referring to FIG. 4, the inert gas supply unit 40 refers to a gas that is relatively difficult to generate a chemical reaction with other materials. The inert gas supply unit 40 may include a combustible gas or oil, An inert gas is supplied to prevent explosion and possible combustion by gas.

Therefore, the danger of supplying the combustible gas or the explosion hazardous gas to the main body 100 or the explosion-proof case 50 can be prevented in advance to prevent the explosion due to the chemical reaction. The inert gas may be selected from helium, neon, argon, krypton, xenon, radon, nitrogen, carbon dioxide, and creosone, and is not limited to a specific gas.

The inert gas supply unit 40 is selectively positioned on the inner side or the outer side of the main body 100 and is not limited to a specific position.

The positive pressure explosion-proof device 1 includes a compressed gas supply pipe 20 for supplying a compressed gas compressed by the compressed gas switching unit 200 to the space of the main body 100 and a compressed gas supply pipe 20 branched from the compressed gas switching unit 200 And a compressed gas branch pipe (30) for supplying the explosion-proof object (10) independently.

The compressed gas supply pipe 20 extends along the bottom surface of the main body 100 and extends to a predetermined length toward the top as shown in the drawing and is connected to a flow meter (not shown) installed in the main body 100 in a diagonal direction As shown in FIG.

The compressed gas branch pipe 30 supplies an inert gas to the explosion-proof case 50 in which the explosion-proof object 10 is located. The control valve 4 is connected to the compression gas supply pipe 20 and the compressed gas branch pipe 30, ) Controls the supply of inert gas or explosion-proof gas. For reference, the control valve 4 may be a three-way valve, but it is also possible to use other valves capable of turning.

Further, when the explosion-proof case (50) is provided, the compressed gas branch is branched into each explosion-proof case to supply an inert gas or explosion-proof gas.

The positive pressure explosion-proof device 1 includes a first fire extinguishing unit 400 installed in the main body 100 in a state where the fire extinguishing case 50 is partly inserted, And a second fire extinguishing unit 500 provided in the main body 100 separately from the main body 100 and discharging fire extinguishing gas when a fire occurs in the main body 100.

Since the first fire extinguishing unit 400 is directly sprayed toward the explosion-proof object 10 through the first header portion 410 through which the fire extinguishing agent is sprayed, rapid fire extinguishing occurs in the event of an emergency, The loss can be minimized.

The first fire extinguishing unit 400 is branched from the first header portion 410 and is configured to eject the extinguishing agent into the inner space of the body portion 100 or relatively to the inner space of the explosion- The fire extinguishing agent is sprayed when the fire occurs in the main body 100 through the second fire extinguishing unit 500 because the internal space of the fire extinguishing unit 100 is wide.

The first fire extinguishing unit 400 is relatively small in size compared to the second fire extinguishing unit 500 and the amount of the extinguishing agent stored therein is also different. Since the fire extinguishing object 10 is extinguished, Only the extinguishing agent is released for n minutes to extinguish.

The second fire extinguishing unit 500 includes a second header unit 510 through which the extinguishing agent is ejected. The second header unit 510 has a plurality of ejection openings to eject the extinguishing agent in all directions, Fire suppression can be implemented in a short time, thereby minimizing additional casualties and economic losses.

A positive-pressure explosion-proof apparatus according to another embodiment of the present invention will be described with reference to the drawings.

1 and 5, the positive pressure type explosion device 1 includes a main body 100 having a space in which the explosion-proof object 10 is stored, a main body 100 positioned inside the main body 100, A compressed gas switching unit 200 for switching the explosion-proof gas to a compressed gas to protect the internal space of the main body 100 and maintaining the internal space of the main body 100 in a positive pressure state, A sensing part 2 for sensing the presence or absence of a combustible gas contained in the outside air supplied to the main body 100 through the outside air introduction part 300, An inert gas supply unit 40 for supplying an inert gas to the main body 100 and a ratio of an inert gas supplied to the main body 100 through the inert gas supply unit 40, The ratio of the explosion-proof gas to be supplied to the unit 100 is made different In the presence or absence of the combustible gas detected by the sensing unit (2) and a controller 600 for selectively controlling the on-off state of the compressed gas switching section 200. The

In the present embodiment, the structure of the main body 100, the compressed gas switching portion 200, the outside air inlet portion 300 and the incompressible gas supply portion are similar to those described above, 2 and the control unit 600 will be described in detail.

The sensing unit 2 includes a first sensing unit 2a mounted on the outside air inlet 300 to sense the presence of a combustible gas and a body sensing unit 2d installed in the interior of the body 100. [

The first sensing unit 2a senses the possibility of explosion and the presence of gas which may be a fire, such as a flammable gas or a vapor, into the outside air flowing through the outside air introduction unit 300, and transmits the sensed gas to the control unit 600, And controls the on / off state of the compressed gas switching unit 200 to block the inflow of the combustible gas through the outside air.

The main body sensing unit 2d is installed inside the main body unit 100 in case of an error or failure in the first sensing unit 2a. Therefore, the explosion-proof object can be safely protected from the explosion by the combustible gas and the fire.

Since the inert gas is relatively expensive compared to the explosion-proof gas, the inside of the main body 100 is filled with the outside air, which is an explosion-proof gas, And the explosion-proof case 50 in which the explosion-proof object is stored is filled with only the inert gas or the inert gas and the explosion-proof gas are controlled to be mixed at a specific ratio.

The control unit 600 includes a main valve 61 for interrupting the supply of the explosion-proof gas and the inert gas supplied to the main body 100 or the explosion-proof case 50 via the compressed gas switching unit 200, The relief valve 63 is opened when the pressure inside the main body 100 is higher than the maximum set pressure and is closed when the pressure inside the main body 100 is lower than the maximum set pressure, And receives pressure state information through a plurality of pressure gauges 64 provided in the main body 100. [

The state of use of the positive-pressure explosion-proof apparatus according to one embodiment of the present invention will be described with reference to the drawings.

6, the control unit 600 switches the operation state of the compressed gas switching unit 200 to the on state, and the compressed gas switching unit 200 switches the explosion gas required for the operation to the outside air introduction unit 300 .

The air to be compressed is moved through the branch duct 310 in the air-conditioning duct 3 installed in the building, and the foreign substances are filtered while passing through the filter unit 320 and then supplied to the compressed gas switching unit 200.

The first sensing unit 2a senses the presence or absence of a combustible gas contained in the air to be compressed and transmits the sensing result to the controller 600. The controller 600 determines whether the air to be compressed is abnormal. If a small amount of combustible gas is contained in the air to be compressed, the alarm unit 700 is activated and the compressed gas switching unit 200 is turned off, so that no further damage is generated.

When it is determined that the air to be compressed is in a normal state, the explosion-proof gas is stably supplied to the explosion-proof object 10 through the compressed gas branch pipe 30 via the compressed gas supply pipe 20.

The explosion-proof object 10 is stored in the explosion-proof case 50. In this embodiment, a small amount of outside air is supplied to the explosion-proof case 50 and most of the inert gas is supplied through the inert gas supply unit 40, And maintains the inside of the valve body 31 in a positive pressure state.

The compressed gas is supplied to the body portion 100 having a relatively large area through the compressed gas supply pipe 20 until the explosion gas is maintained in the positive pressure state.

The control unit 600 controls the compression gas switching unit 200 to be turned off when it is determined that both the explosion-proof case 50 and the main body 100 are maintained in the normal positive pressure state according to the data input through the pressure gauge 64. [ So that the supply of further explosion-proof gas is stopped.

When the purge valve 62 is switched to the opened state and the pressure difference between the main body 100 and the outside is applied to the main body 100, Purging is performed. Since the purge valve 62 is automatically closed after the purging of the main body 100 is completed, the positive pressure state of the main body 100 is normally maintained by the outside air supplied from the air conditioning duct 3 as described above .

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention as set forth in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

10: Explosion proof object
2:
2a: first sensing unit
2b: second sensing unit
2d: body detection unit
3: Air duct
4: Regulating valve
20: Compressed gas supply pipe
30: Compressed gas distributor
40: Inert gas supply part
50: explosion-proof case
52: Inner case
54: Outer case
55: Check window
56: Door
100:
200: compressed gas switching unit
210: protective cover
300: outside air introduction part
310: branch duct
320:
340:
350: supply pipe
400: first fire extinguishing unit
410: first header portion
500: the second fire extinguishing unit
510: second header portion
600:

Claims (13)

A body portion having a space in which an explosion-proof object is stored;
A compressed gas switching unit located inside the main body and converting the explosion-proof gas for protecting the explosion-proof object into a compressed gas to maintain the internal space of the main body in a positive pressure state;
A compressed gas supply pipe for supplying the compressed gas compressed by the compressed gas switching unit to the space of the main body part;
A compressed gas distribution branch branched by the compressed gas switching section and independently supplied to the explosion-proof object; And
And an outside air introduction portion for supplying outside air to the compressed gas switching portion. The method according to claim 1,
The positive-pressure explosion-proof apparatus is characterized in that,
Wherein said explosion-proof case includes said explosion-proof object independently embedded therein. 3. The method of claim 2,
The explosion-
An inner case on which the explosion-proof object is seated;
An outer case surrounding the inner case;
And a door provided on one side of the inner case and the outer case and having a check window for visually recognizing the abnormality of the explosion-proof object. The method according to claim 1,
Wherein the compressed gas switching unit includes:
Is protected by a protective cover that surrounds the outside of the apparatus. The method according to claim 1,
The outside-
And the air to be compressed is supplied to the compressed gas switching unit through the branch duct branched from the air conditioning duct of the building in which the positive pressure explosion-proof device is installed. 6. The method of claim 5,
The outside-
And a filter unit mounted on the branch duct and filtering a foreign substance contained in the outside air. The method according to claim 6,
The positive-pressure explosion-proof apparatus is characterized in that,
And a first sensing unit for sensing the presence or absence of a combustible gas contained in the outside air passing through the filter unit. The method according to claim 1,
The outside-
A suction unit for directly sucking outside air at a place where the positive pressure type explosion device is installed;
And a supply pipe for supplying the outside air sucked by the suction unit to the compressed gas switching unit. 9. The method of claim 8,
The positive-pressure explosion-proof apparatus is characterized in that,
And a second sensing unit for sensing the presence or absence of a combustible gas contained in the outside air passing through the supply pipe. delete The method according to claim 1,
The positive-pressure explosion-proof apparatus is characterized in that,
And an inert gas supply unit for supplying an inert gas to the compressed gas supply pipe. 3. The method of claim 2,
The positive-pressure explosion-proof apparatus is characterized in that,
A first fire extinguishing unit provided in the main body in a state where the fire extinguishing case is partially inserted, and in which a fire extinguishing gas is emitted when a fire occurs;
And a second extinguishing unit provided in the main body separately from the first extinguishing unit and configured to discharge a extinguishing gas when a fire occurs in the main body. A body portion having a space in which an explosion-proof object is stored;
A compressed gas switching unit located inside the main body and converting the explosion-proof gas for protecting the explosion-proof object into a compressed gas to maintain the internal space of the main body in a positive pressure state;
An outside air introduction part for supplying outside air to the compressed gas switching part;
A sensing unit sensing the presence or absence of a combustible gas contained in the outside air supplied to the body through the outside air introduction unit;
An inert gas supply unit for supplying an inert gas to the main body; And
The ratio of the inert gas supplied to the main body portion through the inert gas supply portion and the ratio of the explosion gas supplied to the main body portion through the compressed gas switching portion are controlled at different ratios, and depending on the presence or absence of the combustible gas sensed by the sensing portion, And a control unit for selectively controlling on / off states of the switching unit.

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