KR101886868B1 - Explosion-proof equipment - Google Patents

Abstract

The present invention relates to explosion-proof equipment for accommodating an explosion-proof object, and more particularly, to explosion-proof equipment for controlling the inner pressure and temperature of the explosion-proof equipment and preventing explosion through flammable gas and an ignition source. An objective of the present invention is to maintain the inner temperature of the explosion-proof equipment in a predetermined range and to prevent explosion due to flammable gas existing outside the explosion-proof equipment. An objective of the present invention is to provide a solenoid valve and a relief valve, which are included in the explosion-proof equipment, on a diagonal line to efficiently discharge the flammable gas in the explosion-proof equipment. The explosion-proof equipment includes an explosion-proof equipment control device; a solenoid valve; a relief valve; an explosion-proof temperature sensor; a cooler; a heater; and a control part.

Description

Explosion-proof equipment

The present invention relates to explosion-proof equipment for housing an explosion-proof object therein, and more particularly, to explosion-proof equipment for controlling the pressure and temperature inside explosion-proof equipment to prevent explosion through flammable gas and an ignition source.

In the field where the combustible gas is exposed, the occurrence of a small ignition source may cause a large explosion accident. In other words, sites such as petrochemical, gas, heavy industry equipment, oil refinery and storage contain a number of dangerous substances in various processes, which can lead to explosion hazards such as fire and gas poisoning. Furthermore, due to the above-mentioned explosion, a fire can be spread to nearby houses, mountains, and the like, resulting in a very large accident.

For this reason, the majority of cabinets installed in explosion-proof areas are designed to 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.

The conventional explosion-proof case has no function of controlling the temperature inside the explosion-proof case. As the temperature inside the explosion-proof case becomes higher, the temperature outside the explosion-proof case can be increased as well, and the flammable gas remaining on the surface of the explosion-proof case can be connected to the explosion.

Korean Patent Registration No. 10-1800848

An object of the present invention is to maintain the temperature inside the explosion-proof equipment in a predetermined range to prevent explosion due to flammable gas present outside the explosion-proof equipment.

An object of the present invention is to provide a solenoid valve and a relief valve, which are included in explosion-proof equipment, on a diagonal line, thereby efficiently discharging flammable gas in the explosion-proof equipment.

An object of the present invention is to provide an explosion-proof equipment control device which is integrally coupled to an explosion-proof equipment for storing an explosion-proof object therein.

Another object of the present invention is to provide a protection circuit for preventing overcurrent and overvoltage from being included in the explosion control device control device so as to prevent spark from occurring even if the input switch protruded on the surface of the explosion control device control device is turned on and off.

Another object of the present invention is to provide an explosion-proof equipment control apparatus which sets a plurality of reference pressures and drives a solenoid valve or a relief valve according to whether a pressure inside the explosion-proof equipment reaches one of the reference pressures, The internal combustible gas is discharged, and the internal pressure that the combustible gas can not enter can be maintained.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

An explosion-proof equipment for storing an explosion-proof object therein is inserted into a groove formed in the front face of the explosion-proof equipment and controls the explosion-proof equipment. A solenoid valve for introducing compressed gas into the explosion-proof equipment; A relief valve for discharging fluid in the explosion-proof device; An explosion-proof temperature sensor disposed on the inner wall of the explosion-proof device; A cooler disposed on an inner wall of the explosion-proof device; A heater disposed on an inner wall of the explosion-proof device; The explosion-proof equipment control device includes a controller for controlling the explosion-proof equipment control device, and the controller includes a heater driving unit for driving the heater when the temperature received from the explosion-proof temperature sensor is -20 degrees or less. And a cooler driving unit for driving the cooler when the temperature received from the explosion-proof temperature sensor is 40 degrees or more.

The relief valve is formed on an upper portion or a lower portion of any one of the upper and lower surfaces, and the solenoid valve is disposed at a lower portion of a surface facing the one surface when the relief valve is formed on the upper surface. And when the relief valve is formed on the lower surface of the one surface, the relief valve is formed on an upper surface of the surface facing the one surface.

An object of the present invention is to maintain the temperature inside the explosion-proof equipment in a predetermined range to prevent explosion due to flammable gas present outside the explosion-proof equipment.

An object of the present invention is to provide a solenoid valve and a relief valve, which are included in explosion-proof equipment, on a diagonal line, thereby efficiently discharging flammable gas in the explosion-proof equipment.

The present invention can provide an explosion-proof equipment control device which is integrally combined with explosion-proof equipment for storing an explosion-proof object therein.

The present invention can include a protection circuit for preventing overcurrent and overvoltage in the explosion-proof equipment control device so that a spark is not generated even if the input switch protruding from the surface of the explosion-proof equipment control device is turned on and off.

According to the present invention, the explosion-proof equipment control device sets a plurality of reference pressures and drives the solenoid valve or the relief valve according to whether the pressure inside the explosion-proof equipment reaches one of the reference pressures, And the internal pressure at which the combustible gas can not be introduced can be maintained.

The effects of the present invention are not limited to the above-mentioned effects, and various effects can be included within the range that is obvious to a person skilled in the art from the following description.

1 shows an explosion-proof equipment control apparatus.
2 shows explosion-proof equipment in which an explosion-proof equipment control device is embedded.
3 is a block diagram showing the detailed configuration of the explosion-proof equipment control device.
4 is a circuit diagram for connecting a control unit and an input unit of the explosion-proof equipment control apparatus.
FIG. 5 illustrates explosion-proof equipment according to one embodiment.
Figure 6 shows an explosion-proof LED luminaire coupled with explosion-proof equipment.
Figure 7 shows an explosion-proof LED luminaire.
8 is a cross-sectional view taken along line AA 'in FIG.
Fig. 9 is an enlarged view of the area B in Fig.
FIG. 10 is a cross-sectional view of the CC 'region in FIG. 6; FIG.
11 illustrates an explosion proofing device according to one embodiment.
Fig. 12 shows an explosion-proof temperature sensor.
Fig. 13 is a cross-sectional view of the protection tube in the longitudinal direction taken along the line of the explosion-proof temperature sensor.
Fig. 14 is a cross-sectional view of the protective pipe in the width direction in the explosion-proof temperature sensor. Fig.
Fig. 15 shows a state in which an elastic body is provided in the explosion-proof temperature sensor.
16 is a flowchart showing the manufacturing method of the explosion-proof temperature sensor.
17 is a graph showing the purge flow rate according to the pressure inside the explosion proof equipment.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below.

Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings may be exaggerated for clarity of description, and the elements denoted by the same reference numerals in the drawings are the same elements. In the drawings, like reference numerals are used throughout the drawings. In addition, "including" an element throughout the specification does not exclude other elements unless specifically stated to the contrary.

As used herein, the term " block " refers to a block of hardware or software configured to be changed or pluggable, i.e., a unit or block that performs a specific function in hardware or software.

Fig. 1 shows an explosion-proof equipment control apparatus 1000. Fig. 2 shows explosion-proof equipment 10 in which explosion-proof equipment control apparatus 1000 is buried. 3 is a block diagram showing the detailed configuration of the explosion-proof equipment control apparatus 1000. As shown in FIG.

Referring to FIG. 1, the explosion-proof equipment control apparatus 1000 includes an input unit 1220, a display 1230, and an alarm unit 1240 on its front side. The input unit 1220 inputs information to the explosion-proof equipment control apparatus 1000, and the explosion-proof equipment control apparatus 1000 operates based on the input information. The display 1230 outputs information such as the pressure inside the explosion-proof equipment 10, temperature, and the like. The alarm unit 1240 outputs an audible sound under the control of the control unit 1100.

Referring to FIG. 2, the explosion-proof equipment control apparatus 1000 may be inserted into a groove 9 formed in the front face of the explosion-proof equipment 10 and fastened thereto. The front face of the explosion-proof equipment 10 is a face located in the direction of decreasing to the y-axis among two faces perpendicular to the y-axis shown in Fig. Since the conventional explosion-proof equipment control apparatus 1000 has to be connected to the outside of the explosion-proof equipment 10, it requires a large area to install the explosion-proof equipment 10 and the explosion-proof equipment control apparatus 1000.

The directions shown in the figure are as follows.

The left side of the explosion-proof equipment 10 is a face located in the direction of decreasing in the x axis, the right side is a face located in the direction of increasing in the x axis, the front face is a face located in the direction of decreasing in the y axis, The upper surface is a surface located in the direction of increasing in the z axis, and the lower surface is a surface located in the direction of decreasing in the z axis.

The explosion-proof equipment control apparatus 1000 is a device for controlling the explosion-proof equipment 10 shown in FIG. 2, and in detail controls the configuration of the explosion-proof equipment 10. The above configuration includes at least one of a solenoid valve 11, a relief valve 12, a compressor 20, a pressure gauge, a cooler 30, a heater 40, and an explosion-proof temperature sensor such as an explosion-proof LED. That is, the explosion-proof apparatus 10 includes at least one of a solenoid valve 11, a relief valve 12, a compressor 20, a cooler 30, a heater 40, and an explosion-proof temperature sensor such as an explosion-proof LED.

The explosion proofing apparatus 10 shown in FIG. 2 includes a door 7 disposed on the front surface of the door 7 and a handle 8 is disposed on the left side of the door 7 to open and close the door 7. And a compressor 20 for supplying a compressed gas into the explosion-proof equipment 10 through the solenoid valve 11. [ That is, when the solenoid valve 11 is opened, the compressed gas flows into the explosion-proof device 10, and when the solenoid valve 11 is closed, the compressed gas can not flow into the explosion-proof device 10.

The compressor 20 converts the explosion-proof gas for protecting the explosion-proof object located inside the explosion-proof equipment 10 into a compressed gas form to maintain the internal space of the explosion-proof equipment 10 in a positive pressure state. The compressor (20) can be installed outside or inside the explosion proof equipment (10). The explosion-proof device 10 may further include a protective cover disposed on a surface of the compressor 20 to enclose the compressor 20. [ The protective cover is installed to minimize the direct contact of the compressor (20) with a flammable gas due to fire due to overheating.

The protective cover comprises a plastic composition, wherein the plastic composition comprises polypropylene resin, high density polyethylene resin (HDPE), talc and germanium powder. INDUSTRIAL APPLICABILITY The present invention can improve the mechanical properties such as heat resistance and durability, can improve the twisting phenomenon, and can minimize the harmfulness to the workers handling the manufactured protective cover.

Polypropylene resin is a thermoplastic resin obtained by polymerization of propylene, which is known as an environmentally friendly material which is inexpensive in price compared with performance and is free from risks, and has excellent chemical resistance, mechanical properties and thermal properties. The polypropylene may use at least one selected from a propylene homopolymer, a random copolymer and a block copolymer, but a homopolymer and a random copolymer are mixed in a weight ratio of 3: 2 to improve mechanical properties .

High-density polyethylene (HDPE) resin is a synthetic resin produced by polymerizing ethylene, and has excellent flowability, rigidity, impact resistance, electrical insulation, moldability, and cold resistance. The high-density polyethylene resin may be mixed with the above-mentioned polypropylene resin to improve the moldability by reinforcing the tensile force at the time of manufacturing the protective cover or the product, and a variety of known products may be used.

The talc improves the mechanical properties such as the strength and heat resistance of the plastic composition, and it is preferable to use a talc powder having a particle size of 150 to 200 mesh for mixing with polypropylene resin or the like. The talc may be used in admixture with other filler components, and may preferably be mixed with the dolomite powder at a weight ratio of 1: 1 to contribute to improvement of the durability of the plastic composition.

Germanium is a silvery white metal, which has the effect of promoting metabolism by emitting a large amount of far infrared rays and anions which are beneficial to the human body. Also, due to its semiconducting nature, germanium has a function of increasing the vitality of germanium ions (outer electrons) when they come into contact with the skin. When entering the body, it is released out of the body within 20 ~ 30 hours with various harmful substances, so there is no poisoning or side effects at all. Particularly, when the particles of inorganic germanium come into contact with human skin, semiconductor properties are introduced into the skin tissue by the osmotic action of the outer electron. It has been found that germanium, which penetrates into capillaries in subcutaneous tissues, moves electrons in the blood vessels through the blood vessel walls, performs blood purification, normalizes blood, and discharges excess electron flow to relieve pain. The germanium can be used in the form of powder. It is preferable that the germanium ore is finely cut to 3 cm or less and then the cut germanium ore is pulverized to a particle size of 80 to 100 mesh.

In one embodiment, the plastic composition preferably comprises 110 to 130 parts by weight of high density polyethylene resin, 170 to 190 parts by weight of talc, and 1 to 10 parts by weight of germanium powder per 100 parts by weight of the polypropylene resin. When preparing a protective cover using a plastic composition, it is important to control the specific gravity of the plastic composition in order to eliminate a twisting phenomenon. The specific gravity is preferably 1.02 to 1.10, more preferably 1.03 to 1.05. That is, when the content of the high-density polyethylene resin is less than 110 parts by weight or the talc is less than 170 parts by weight based on 100 parts by weight of the polypropylene resin, mechanical properties such as durability and the like are limited. Is more than 130 parts by weight or the talc is more than 190 parts by weight, there is a possibility that the specific gravity of the plastic composition is increased and the moldability may be deteriorated. If the amount of the germanium powder is less than 1 part by weight with respect to 100 parts by weight of the polypropylene resin, far infrared rays emission effect due to germanium is difficult to manifest. If the amount is more than 10 parts by weight, .

On the other hand, the plastic composition may further contain various additives in order to improve mechanical properties, mixing properties, moldability, antibacterial properties and the like.

In one embodiment, the plastic composition may further comprise a garlic extract. The garlic extract is a natural adhesive component and functions as a binder for improving the mixing property with other constituents such as a polypropylene resin and a high-density polyethylene resin. The garlic extract is peeled and crushed, and 2 to 3 parts by weight of water is added per 1 part by weight of garlic. After heating at 80 to 100 캜 for 5 hours or more, the liquid component is extracted and filtered, The liquid component can be prepared by concentrating at 55 to 60 占 폚. The garlic extract is preferably contained in an amount of 10 to 20 parts by weight based on 100 parts by weight of the polypropylene resin. When the content of the garlic extract is less than 10 parts by weight, the polypropylene resin and talc can not be properly entangled so that the surface may not be uniformly formed during the production of the protective cover. When the content of the garlic extract is more than 20 parts by weight, There is a possibility that the mixing property is lowered.

At this time, a sucrose (C12H22O11) powder may be mixed and used to supplement the function of the garlic extract. The sucrose improves the mixing properties of the entire composition to enable extrusion in the form of a thin film during the stretching process for producing a protective cover, and viscous during mixing with the polypropylene resin or the like, It can also contribute to problem solving. The sucrose is preferably a powder having a particle size of from 1 to 120 탆 in an amount of 95 wt% or more, which is filtered through a 120-mesh net, and is preferably contained in an amount of 1 to 5 parts by weight based on 100 parts by weight of the polypropylene resin. When the content of sucrose is less than 1 part by weight, the effect expressed by sucrose is insignificant. When the amount of the sucrose is more than 5 parts by weight, the viscosity of the plastic composition is excessively increased, and it is difficult to form a uniform sheet.

In one embodiment, the plastic composition may further comprise a clay powder. Kaolin is white clay based on kaolinite and halloysite, and has excellent resistance to abrasion and thermal shock. The clay is preferably contained in an amount of 5 to 10 parts by weight based on 100 parts by weight of the polypropylene. If the amount of the clay is less than 5 parts by weight, there is a problem that the resistance to the external environment is weak. If the amount is more than 10 parts by weight, a synergistic effect of mechanical properties such as a decrease in compressive strength may not be exhibited.

In one embodiment, the plastic composition may further comprise titanium dioxide (TiO2). The titanium dioxide can serve as a filler capable of improving the heat resistance of the plastic composition. The titanium dioxide is preferably contained in an amount of 5 to 15 parts by weight based on 100 parts by weight of the polypropylene resin. If the amount of the titanium dioxide is less than 5 parts by weight, the wear resistance of the protective cover formed by the plastic composition can not be effectively improved. If the amount exceeds 15 parts by weight, workability may be deteriorated, .

In one embodiment, the plastic composition may further comprise aluminum hydroxide. Aluminum hydroxide functions as an antimicrobial agent capable of improving the antimicrobial properties of the plastic composition. It is preferable to use boehmite (AlOH (OH)) as the aluminum hydroxide. Boehmite can be any of γ-boehmite, α-boehmite and pseudo-boehmite. Of these, γ-boehmite excellent in crystallinity and excellent in thermal stability and chemical stability, structurally neutral, and excellent in antibacterial property is preferably used. The γ-boehmite can be prepared by supercritical synthesis of only water (pure water) and aluminum (Al). The aluminum hydroxide may be contained in an amount of 2 to 7 parts by weight based on 100 parts by weight of the polypropylene resin. If the content of aluminum hydroxide is less than 2 parts by weight, it is difficult to exhibit the antimicrobial effect to be achieved. If the content is more than 7 parts by weight, the compatibility with other components may be impaired.

The plastic composition may further contain a dispersant, an antifoaming agent and the like within a range not hindering the object of the present invention, and may further include a coloring component to realize various colors of the protective cover to be produced.

[Example]

A plastic composition was prepared according to the composition shown in Table 1 below. Each material was made of commercially available material. In the case of garlic extract, it was prepared as described in the description of the invention, and the aluminum hydroxide used was gamma-boehmite.

[Table 1]

[Experimental Example 1]

The compositions of Examples 1 to 5 were heated and then stretched to prepare a protective cover having a thickness of 10 mm. The uniformity of the sheet surface was confirmed, and it is shown in Table 2 below. The uniformity was measured using a laser sensor (N ₂ laser, oscillation wavelength 337.1 nm, UDHO Laser., Japan), and 30 points were randomly selected to measure their surface roughness ㅁ 0.3 is less than 0.3, and more than 0.3 is not. Here, Examples 1 and 5 were subjected to a third elongation in the longitudinal direction, and Examples 2 to 4 were subjected to a third elongation in the longitudinal direction, the width direction and the longitudinal direction.

[Table 2]

As shown in Table 2, in the case of Examples 1 to 5, the uniformity of the produced sheet was all good. Among them, it was found that the uniformity of Example 3 was the most excellent.

[Experimental Example 2: Torsion Test]

The compositions of Examples 1 to 5 were heated and then stretched to prepare a plastic sheet having a thickness of 2 mm and then molded to prepare 100 protective covers. At this time, the completeness of the final product was evaluated, . Here, Examples 1 and 5 were subjected to a third elongation in the longitudinal direction, and Examples 2 to 4 were subjected to a third elongation in the longitudinal direction, the width direction and the longitudinal direction. 2 is a diagram showing a state in a good state, and Fig. 3 is a diagram showing a state in which it is in a bad state (twist phenomenon).

[Table 3]

As shown in Table 3, in Examples 2 to 4, more than 90% of normal products could be made. Particularly, in Example 3, the defective rate was very small.

[Experimental Example 3: Odor test]

An odor test was carried out for Examples 1 and 3 using ammonia gas. After the initial concentration measurement, the concentration after 5 minutes was measured and the deodorization rate was evaluated. The results are shown in Table 4 below.

[Table 4]

As shown in Table 4, it was found that Example 1 had little deodorizing effect, but Example 3 showed some deodorizing effect.

[Experimental Example 4: Antimicrobial Test]

The compositions of Examples 1 and 3 were tested for antibacterial activity (JIS Z 2801). Staphylococcus aureus ATCC 6538 (Staphylococcus aureus) and Escherichia coli ATCC 25922 (Escherichia coli) were used as the test strains, and the antibacterial activity (antibacterial activity value) was evaluated.

[Table 5]

The antimicrobial activity value refers to a value obtained by evaluating the degree of antimicrobial activity by comparing the number of strains cultured for a certain period of time. When the value is 1 or more, 90% or more of the strains are present, 2 or more are 99% , More than 99.99% of the strain is over 4, and more than 5 is more than 99.999% of the strain is killed. In the case of Example 3, it was confirmed that the antibacterial effect by γ-boehmite was exhibited.

The relief valve 12 discharges the fluid inside the explosion-proof equipment 10 to the outside of the explosion-proof equipment 10 or cuts off the discharge. That is, when the relief valve 12 is opened, the fluid inside the explosion-proof equipment 10 is discharged outside the explosion-proof equipment 10. [ Further, when the relief valve 12 is closed, the discharge of the fluid present in the explosion-proof equipment 10 is cut off.

The pressure gauge measures the pressure inside the explosion-proof equipment 10 and transfers the pressure to the explosion-proof equipment control unit 1000.

Although the explosion-proof object is not shown in Fig. 2, it can be disposed inside the explosion-proof equipment 10. [ The object to be explosion-proof may be placed in an exposed state in the inner space of the explosion-proof equipment 10 or may be stored independently in the explosion-proof equipment 10. When the object to be explosion-proof is embedded in the explosion-proof equipment 10 independently, it is safely stored from an ignition source such as a fire or a flammable gas, and the inflow of the ignition material is completely blocked by the explosion-proof equipment 10, And can be safely stored.

The explosion-proof apparatus 10 may include an inner case on which an explosion-proof object is seated and an outer case surrounding the inner case, and the explosion-proof object may be located inside the sealed inner case. When the explosion-proof object is stored in the explosion-proof equipment 10, it is isolated from a fire or a combustible gas and an ignition source, so that even if a fire occurs, it can be safely stored for a certain period of time. Accordingly, even if a fire is partially generated in the explosion-proof equipment 10, it is possible to provide a time for immediately performing the initial fire extinguishing.

Referring to FIG. 3, the explosion-proof equipment control apparatus 1000 embedded in the explosion-proof equipment 10 for storing therein an explosion-proof object includes an alarm 1240 for outputting an audible sound; A display 1230 for outputting the internal pressure of the explosion-proof equipment 10; The control unit 1100 includes a minimum pressure setting unit 1110 for setting a minimum pressure inside the explosion-proof equipment 10, and a control unit 1100 for controlling the explosion-proof equipment control device 1000 as a whole. An alarm generation pressure setting unit 1120 for setting an alarm generation pressure as a reference pressure for driving the alarm 1240; A normal pressure setting unit 1130 for setting a normal pressure in the explosion-proof equipment 10; A hysteresis pressure setting unit (1140) for setting a hysteresis pressure inside the explosion-proof equipment (10); A purge pressure setting unit 1150 for setting a purge pressure inside the explosion-proof equipment 10; A maximum pressure setting unit 1160 for setting a maximum pressure inside the explosion-proof equipment 10; A purge time calculating unit 1170 for calculating a purge flow rate corresponding to the purge pressure value and dividing the purge flow rate by a value obtained by multiplying the volume inside the explosion-proof equipment 10 by 5; A blocking relay drive for setting a blocking relay driving pressure, which is a reference pressure for shutting off the power of the configuration included in the explosion-proof equipment 10 but for shutting off the power for the explosion-proof equipment control apparatus 1000, A pressure selection unit 1250; An output unit 1180 for outputting the pressure to the display 1230 when the pressure received through the pressure gauge is maintained for 2 seconds to 3 seconds; And an alarm unit (1190) for driving an alarm (1240) so that an alarm is output when the pressure inside the explosion-proof equipment (10) is equal to or lower than a notification generation pressure, wherein the alarm generation pressure is larger than the minimum pressure, The pressure is greater than the alarm generation pressure, the hysteresis pressure is greater than the normal pressure, the purge pressure is greater than the hysteresis pressure, the maximum pressure is greater than the purge pressure, and the compressed gas is introduced into the explosion- The pressure of the explosion-proof device 10 is lower than the minimum pressure and the alarm is generated when the door of the explosion-proof device 10 is opened. In this case, the solenoid valve 11 is opened and the solenoid valve 11 is opened. After the purging time from the time when the pressure exceeds the purge pressure via the normal pressure and the hysteresis pressure, the solenoid valve 11 A closing solenoid valve driving unit 1200; And the relief valve (12) for discharging the fluid inside the explosion proof device (10) to the outside. When the pressure inside the explosion proof equipment (10) is less than the purge pressure, the relief valve And a relief valve driving unit 1210 for opening the relief valve 12 when the internal pressure is equal to or higher than the purge pressure.

The explosion-proof equipment control apparatus 1000 is embedded in the explosion-proof equipment 10 for storing an explosion-proof object therein, as shown in FIG.

The alarm 1240 outputs an audible sound. A detailed explanation of the alarm 1240 outputting an audible sound will be described later.

The display 1230 outputs the pressure inside the explosion-proof equipment 10. [ The display 1230 outputs information such as the pressure inside the explosion-proof equipment 10, temperature, and the like.

The explosion-proof equipment control apparatus 1000 includes a control unit 1100 for controlling the explosion-proof equipment control apparatus 1000 as a whole. The controller 1100 may be a microcontroller or a microprocessor. That is, the control unit 1100 is implemented by a microprocessor or microcontroller that executes a program stored in a storage unit included in the explosion-proof equipment control apparatus 1000. The configuration of the explosion device control apparatus 1000 and each block included in the controller 1100 may denote a functional block of the program code.

The control unit 1100 includes a minimum pressure setting unit 1110 for setting a minimum pressure inside the explosion-proof equipment 10; An alarm generation pressure setting unit 1120 for setting an alarm generation pressure as a reference pressure for driving the alarm 1240; A normal pressure setting unit 1130 for setting a normal pressure in the explosion-proof equipment 10; A hysteresis pressure setting unit (1140) for setting a hysteresis pressure inside the explosion-proof equipment (10); A purge pressure setting unit 1150 for setting a purge pressure inside the explosion-proof equipment 10; A maximum pressure setting unit 1160 for setting a maximum pressure inside the explosion-proof equipment 10; A purge time calculating unit 1170 for calculating a purge flow rate corresponding to the purge pressure value and dividing the purge flow rate by a value obtained by multiplying the volume inside the explosion-proof equipment 10 by 5; A blocking relay drive for setting a blocking relay driving pressure, which is a reference pressure for shutting off the power of the configuration included in the explosion-proof equipment 10 but for shutting off the power for the explosion-proof equipment control apparatus 1000, A pressure selection unit 1250; An output unit 1180 for outputting the pressure to the display 1230 when the pressure received through the pressure gauge is maintained for 2 seconds to 3 seconds; And an alarm unit 1190 for driving the alarm unit 1240 so that an alarm is output when the pressure inside the explosion-proof equipment 10 is equal to or lower than the notification generation pressure.

The minimum pressure setting unit 1110 sets a minimum pressure inside the explosion-proof equipment 10. [ The minimum pressure inside the explosion-proof equipment 10 is the internal pressure of the explosion-proof equipment 10 in a state where the door 7 of the explosion-proof equipment 10, the solenoid valve 11 and the relief valve 12 are all closed at 25 pascals .

The alarm generating pressure setting unit 1120 sets an alarm generating pressure, which is a reference pressure for driving the alarm unit 1240. The control unit 1100 drives the alarm unit 1240 when the internal pressure of the explosion-proof equipment 10 is lower than the alarm generation pressure. The alarm generating pressure is 30 pascals.

The normal pressure setting unit 1130 sets a normal pressure in the explosion-proof equipment 10. [ The normal pressure is 100 pascals. The normal pressure is a minimum pressure when the explosion-proof equipment control apparatus 1000 maintains the explosion-proof equipment 10 in a positive pressure state.

The hysteresis pressure setting unit 1140 sets the hysteresis pressure in the explosion-proof equipment 10. [ The hysteresis pressure is 400 pascals. The hysteresis pressure is a maximum pressure when the explosion-proof equipment control apparatus 1000 keeps the explosion-proof equipment 10 in a positive pressure state. That is, the positive pressure state maintains a proper pressure to prevent the flammable gas from flowing into the explosion-proof equipment 10, and the pressure inside the explosion-proof equipment 10 in the positive pressure state is 100 to 400 pascals.

The purge pressure setting unit 1150 sets a purge pressure in the explosion-proof equipment 10. [ The purge pressure is 500 pascals. The purge pressure is a reference pressure at which the relief valve 12 opens when the solenoid valve 11 is open. That is, when the door 7 of the explosion-proof equipment 10 is closed and the internal pressure of the explosion-proof equipment 10 increases from the pressure below the minimum pressure as the solenoid valve 11 is opened to reach the purge pressure, 1100 open the closed relief valve 12 so that the flammable gas is discharged from the explosion proof equipment 10 through the relief valve 12 to the outside.

The maximum pressure setting unit 1160 sets the maximum pressure in the explosion-proof equipment 10. [ The maximum pressure is 2.5 kPascal with a reference pressure that the explosion proofing device 10 can accommodate to the maximum.

The purge time calculating unit 1170 calculates the purge flow rate corresponding to the purge pressure value, and calculates the purge time by dividing the purge flow rate by a value obtained by multiplying the volume inside the explosion-proof equipment 10 by 5. [ Referring to FIG. 17, which will be described later, the purge flow rate according to the pressure inside the explosion-proof equipment 10 can be confirmed. That is, the graph of FIG. 17 shows the flow rate of the fluid discharged when the relief valve 12 is opened in accordance with the pressure inside the explosion-proof equipment 10. FIG. 17 is the model name of the relief valve 12, and the number in front of the model name is the number of the relief valves 12. As the number of relief valves 12 increases from 1 to 2, 3, it can be seen that the purge flow rate is increased at the internal pressure of the explosion-proof equipment 10. [

The purge time calculator 1170 first selects the purge flow rate corresponding to the purge pressure value. At this time, the purge time calculating unit 1170 calculates the purge time based on the relationship between the number of the relief valves 12 included in the explosion-proof equipment 10 and the purge flow rate according to the pressure inside the explosion-proof equipment 10 shown in FIG. 17, The purge flow rate is calculated on the basis of the purge pressure set by the purge flow rate setting unit.

The purge time calculating unit 1170 calculates the purge time by dividing the purge flow rate by a value obtained by multiplying the volume inside the explosion-proof equipment 10 by 5. The purge time is a time for opening the relief valve 12 to discharge the flammable gas from the inside of the explosion-proof equipment 10. Since flammable gases must be discharged in sufficient time, divide the internal volume of the explosion-proof equipment (10) by 5 times the purge flow rate.

The interrupting relay driving pressure selecting unit 1250 selects the interrupting relay driving pressure selecting unit 1250 for interrupting the power supply of the configuration of the explosion-proof equipment 10, Set the relay drive pressure. The blocking relay driving pressure may be the same as the alarm generating pressure. If the internal pressure of the explosion-proof equipment 10 is lower than the alarm generation pressure, there is a high possibility that the flammable gas is introduced into the explosion-proof equipment 10. In this situation, if a spark occurs during operation of some of the components included in the explosion-proof equipment 10, a large explosion may occur.

For this reason, if the internal pressure of the explosion-proof equipment 10 is below the shutoff relay driving pressure, the control unit 1100 opens the blocking relay to shut off the power of the configuration included in the explosion-proof equipment 10. [ However, the power source of the explosion-proof equipment control apparatus 1000 is not shut off. As will be described later, the explosion-proof equipment control apparatus 1000 includes a circuit for preventing overvoltage and overcurrent, so that sparks are not generated in the course of operating the explosion-proof equipment control apparatus 1000.

The output unit 1180 outputs the pressure to the display 1230 when the pressure received through the pressure gauge maintains 2 seconds to 3 seconds. The pressure gauge measures the pressure inside the explosion-proof equipment (10) and transmits it to the explosion-proof equipment control unit (1000). If the internal pressure of the explosion-proof equipment 10 is frequently changed, it is difficult for the user to recognize the pressure if the changed pressure is outputted to the display 1230 in real time. Accordingly, when the internal pressure of the explosion-proof apparatus 10 is maintained for several seconds, the pressure is output to facilitate the user's perception. Keeping the pressure received through the pressure gauge from 2 to 3 seconds may mean that the pressure is maintained between 2 and 3 seconds at 10 Pascals. In this case, the internal pressure of the explosion-proof equipment 10 at the last time point is maintained.

The alarm unit 1190 drives the alarm 1240 so that an alarm is output when the pressure inside the explosion-proof equipment 10 is lower than the notification generation pressure. If the pressure inside the explosion-proof equipment 10 is lower than the notification generation pressure, the flammable gas may be introduced into the explosion-proof equipment 10, and the alarm 1240 may be driven to recognize such a situation.

The alarm unit 1190 drives the alarm 1240 to output a guidance message from the time when the explosion-proof equipment control apparatus 1000 is powered on. The announcement message is, for example, "Time to relax." .

The alarm unit 1190 controls the alarm unit 1240 to output an audible sound of 50 decibel at the alarm unit 1240 when the explosion-proof equipment control apparatus 1000 is powered on for more than 50 minutes.

The alarm unit 1190 controls the alarm 1240 to output 60 dB of audible sound from the alarm 1240 when the explosion-proof equipment control device 1000 is powered on for more than 60 minutes.

The alarm unit 1190 controls the alarm unit 1240 to output audible sound of 70 decibel at the alarm unit 1240 when the explosion-proof equipment control device 1000 is powered on for more than 70 minutes.

The alarm unit 1190 controls the alarm unit 1240 to output audible sound of 80 decibel at the alarm unit 1240 when the explosion-proof equipment control unit 1000 is powered on for more than 80 minutes.

The alarm unit 1190 drives the alarm 1240 to output a sound of high decibel as the time passes from the point of time when the explosion-proof equipment control apparatus 1000 is powered on, so that the workers can easily recognize the time to rest . It is necessary to provide periodic breaks to workers working in the presence of flammable gases. In the past, only the structure of the explosion-proof facility itself was concerned, and the workers were not worried about it. In order to overcome these problems, it is necessary to transmit different sound information to the workers according to the working time.

Wherein the hysteresis pressure is greater than the normal pressure, the purge pressure is greater than the hysteresis pressure, and the maximum pressure is greater than the purge pressure Big. That is, the smallest pressure is the minimum pressure, the alarm pressure, the normal pressure, the hysteresis pressure, the purge pressure, and the maximum pressure.

The control unit 1100 drives the solenoid valve 11 for introducing the compressed gas into the explosion proof equipment 10 and opens the solenoid valve 11 when the door of the explosion proof equipment 10 is closed, The solenoid valve driving unit 1200 closes the solenoid valve 11 after the purge time from the time when the internal pressure of the explosion-proofing apparatus 10 is equal to or higher than the purge pressure via the minimum pressure, the alarm generating pressure, the normal pressure and the hysteresis pressure ); And the relief valve (12) for discharging the fluid inside the explosion proof device (10) to the outside. When the pressure inside the explosion proof equipment (10) is less than the purge pressure, the relief valve And a relief valve driving unit 1210 for opening the relief valve 12 when the internal pressure is equal to or higher than the purge pressure.

The solenoid valve driving unit 1200 drives a solenoid valve 11 for introducing a compressed gas into the explosion proofing apparatus 10 and opens the solenoid valve 11 when the door of the explosion proofing apparatus 10 is closed, The solenoid valve 11 is closed after the purge time from the time when the internal pressure of the explosion-proofing apparatus 10 exceeds the purge pressure via the minimum pressure, the alarm generating pressure, the normal pressure, and the hysteresis pressure.

The solenoid valve driving unit 1200 drives a solenoid valve 11 for introducing the compressed gas into the explosion-proof equipment 10. [ When the solenoid valve driving unit 1200 opens the solenoid valve 11, the compressed gas flows into the explosion-proof apparatus 10, and when the solenoid valve 11 is closed, the compressed gas can not flow into the explosion-proof apparatus 10.

The solenoid valve driver 1200 opens the solenoid valve 11 when the door of the explosion proof device 10 is closed for the first time. When the solenoid valve 11 is opened, the internal pressure of the explosion-proof equipment 10 may be higher than the purge pressure via the minimum pressure, the alarm generation pressure, the normal pressure, and the hysteresis pressure in accordance with the inflow of the compressed gas. The relief valve 12, which will be described later, is closed when the pressure is less than the purge pressure, so that the fluid introduced into the explosion-proof equipment 10 can not be discharged to the outside. The solenoid valve driving unit 1200 closes the solenoid valve 11 after the purge time from the time when the internal pressure of the explosion-proof equipment 10 is equal to or higher than the purge pressure.

The relief valve driving unit 1210 drives the relief valve 12 for discharging the fluid inside the explosion-proof equipment 10 to the outside. When the pressure inside the explosion-proof equipment 10 is lower than the purge pressure, the relief valve 12 is closed , And opens the relief valve (12) when the pressure inside the explosion-proof equipment (10) is equal to or higher than the purge pressure.

The relief valve driving unit 1210 drives the relief valve 12 that discharges the fluid inside the explosion-proof equipment 10 to the outside. When the relief valve 12 is opened, the fluid inside the explosion-proof equipment 10 is discharged to the outside.

The operation of the relief valve driver 1210 and the solenoid valve driver 1200 is summarized as follows. When the door of the explosion proof device 10 is closed for the first time, the solenoid valve 11 is opened and the compressed gas is introduced through the solenoid valve 11 so that the internal pressure of the explosion proof device 10 becomes the minimum pressure, The normal pressure, and the hysteresis pressure. The relief valve 12, which was closed when the internal pressure of the explosion-proof equipment 10 is equal to or higher than the purge pressure, is opened, and the solenoid valve 11 which has been opened after the purge time is closed. Through this process, the flammable gas in the explosion-proof equipment 10 is discharged through the relief valve 12 by the compressed gas introduced through the solenoid valve 11. [

The solenoid valve driving unit 1200 drives the solenoid valve 1200 such that the internal pressure of the explosion-proofing apparatus 10 is increased by the inflow of the compressed gas through the minimum pressure, the alarm generation pressure, the normal pressure, the hysteresis pressure, The solenoid valve 11 is closed. If the internal pressure of the explosion-proof equipment 10 is higher than the maximum pressure, the explosion-proof equipment 10 may be damaged. Therefore, the solenoid valve 11 is closed to prevent the compressed gas from entering the explosion-proof equipment 10.

When the flow rate of the compressed gas entering through the solenoid valve 11 is relatively large, the pressure inside the explosion-proof equipment 10 is lower than the purge pressure when the solenoid valve 11 is open, It can be continued to increase even if it is above the pressure.

The solenoid valve driving unit 1200 drives the solenoid valve 11 when the internal pressure of the explosion-proof apparatus 10 is decreased and the internal pressure of the explosion-proof apparatus 10 is less than the normal pressure after the solenoid valve 11 is closed. And closes the solenoid valve 11 when the internal pressure of the explosion-proof apparatus 10 increases as the solenoid valve 11 is opened and the internal pressure of the explosion-proof apparatus 10 is higher than the hysteresis pressure.

After the solenoid valve 11 is closed, it may be that the pressure of the explosion-proof equipment 10 is higher than the maximum pressure and the solenoid valve 11 is closed. Further, after the solenoid valve 11 is closed, it may be that the solenoid valve 11 is closed after the purge time described above has elapsed.

The reason why the pressure inside the explosion-proof equipment 10 is lowered to the purge pressure after the solenoid valve 11 is closed due to the pressure of the explosion-proof equipment 10 being higher than the maximum pressure is because the relief valve 12 is opened. When the internal pressure of the explosion-proof apparatus 10 is less than the purge pressure, both the solenoid valve 11 and the relief valve 12 are closed. In this case, the fluid may leak out through the gap of the explosion-proof equipment 10. The gap is a gap due to the door 7 or the like. If the internal pressure of the explosion-proof apparatus 10 is gradually decreased and the internal pressure of the explosion-proof apparatus 10 is lower than the normal pressure, the solenoid valve driving unit 1200 opens the solenoid valve 11, The solenoid valve 11 is closed when the internal pressure of the explosion-proof equipment 10 increases as the valve 11 is opened and the internal pressure of the explosion-proof equipment 10 is higher than the hysteresis pressure.

That is, the solenoid valve driving unit 1200 causes the pressure inside the explosion-proof equipment 10 to be less than or equal to the normal pressure and less than or equal to the hysteresis pressure.

4 is a circuit diagram for connecting the control unit 1100 and the input unit 1220 of the explosion-proof equipment control apparatus 1000.

The explosion-proof equipment control apparatus 1000 includes an input unit 1220 protruding from the front surface, and the input unit 1220 includes a first switch, a second switch, a third switch, and a fourth switch, The device 1000 includes a first resistor whose one end is connected to the other end of the first switch; A second resistor whose one end is connected to the other end of the second switch; A third resistor whose one end is connected to the other end of the third switch; A fourth resistor having one end connected to the other end of the fourth switch; A fifth resistor whose one end is connected to the other end of the first switch and one end of the first resistor; A sixth resistor having one end connected to the other end of the second switch and one end of the second resistor; A seventh resistor whose one end is connected to the other end of the third switch and one end of the third resistor; An eighth resistor whose one end is connected to the other end of the fourth switch and one end of the fourth resistor; A first Zener diode having one end connected to the other end of the fifth resistor and the other end connected to the ground; A second Zener diode having one end connected to the other end of the sixth resistor and the other end connected to the ground terminal; A third Zener diode having one end connected to the other end of the seventh resistor and the other end connected to the ground terminal; A fourth Zener diode having one end connected to the other end of the eighth resistor and the other end connected to the ground terminal; A fifth Zener diode whose one end is connected to the other end of the first resistor, the other end of the second resistor, the other end of the third resistor and the other end of the fourth resistor, and the other end is connected to the ground; A first fuse having one end connected to the other end of the fifth resistor and one end of the first zener diode and the other end connected to the control unit 1100; A second fuse having one end connected to one end of the sixth resistor and one end of the first zener diode and the other end connected to the control unit 1100; A third fuse having one end connected to one end of the seventh resistor and one end of the first zener diode and the other end connected to the control unit 1100; A fourth fuse having one end connected to one end of the eighth resistor and one end of the first zener diode and the other end connected to the control unit 1100; And a fifth fuse having one end connected to the other end of the first resistor, the other end of the second resistor, the other end of the third resistor, the other end of the fourth resistor, and the fifth zener diode, .

The explosion-proof equipment control apparatus 1000 includes an input unit 1220 protruding from the front face. The input unit 1220 is shown in FIG. The input unit 1220 includes a first switch, a second switch, a third switch, and a fourth switch. The first switch inputs an esc command, the second switch inputs a cursor left movement command, the third switch inputs a cursor right movement command, and the fourth switch inputs an enter command. The esc command, the left shift command, the right shift command, and the enter command itself are obvious to those skilled in the art.

One end of the first resistor is connected to the other end of the first switch. The second resistor is connected at one end to the other end of the second switch. The third resistor is connected to the other end of the third switch at one end. The fourth resistor is connected at one end to the other end of the fourth switch. The first resistor, the second resistor, the third resistor and the fourth resistor may each be 1 k ohms. And the other end of each resistor is connected to the power supply via the fifth fuse so that the overcurrent which can flow from the power supply when the switch is opened or closed, .

The fifth resistor is connected at one end to the other end of the first switch and one end of the first resistor, the sixth resistor has one end connected to the other end of the second switch and one end of the second resistor, One end thereof is connected to the other end of the third switch and one end of the third resistor, and one end of the eighth resistor is connected to the other end of the fourth switch and one end of the fourth resistor. The fifth resistor, the sixth resistor, the seventh resistor and the eighth resistor may each be 1 k ohm. Since the values of the fifth resistor, the sixth resistor, the seventh resistor and the eighth resistor are large, it is possible to limit an overcurrent that can flow from the power source when the switch is opened or closed.

The first Zener diode has one end connected to the other end of the fifth resistor and the other end connected to the ground terminal. The second Zener diode has one end connected to the other end of the sixth resistor and the other end connected to the ground terminal. The other end of the fourth resistor is connected to the other end of the eighth resistor, and the other end of the fourth resistor is connected to the ground. The first Zener diode to the fourth Zener diode may be ZM4734A-GS08. The first Zener diode and the fourth Zener diode may limit the overvoltage that can be applied from the power source to the switch as the switch is opened or closed.

The fifth Zener diode has one end connected to the other end of the first resistor, the other end of the second resistor, the other end of the third resistor, and the other end of the fourth resistor, and the other end is connected to the ground. The fifth zener diode may be ZM4734A-GS08. The fifth Zener diode may limit the overvoltage that can be applied from the power source to the switch as the switch is opened or closed.

The first fuse has one end connected to the other end of the fifth resistor and one end of the first zener diode and the other end connected to the control unit 1100. The second fuse has one end connected to the other end of the sixth resistor, And the other end of the third fuse is connected to the control unit 1100. The fourth fuse has one end connected to one end of the seventh resistor and one end of the third zener diode and the other end connected to the control unit 1100, One end thereof is connected to the other end of the eighth resistor and one end of the fourth Zener diode, and the other end is connected to the control part 1100. The first to fourth fuses may be GSMB. Also, the first to fourth fuses may be blown when a current of 0.04 A or more flows. The first to fourth fuses may block an overcurrent that may flow from the power supply as the switch is opened or closed.

The fifth fuse has one end connected to the other end of the first resistor, the other end of the second resistor, the other end of the third resistor, the other end of the fourth resistor, and one end of the fifth zener diode. The fifth fuse may be GSMB. Also, the fifth fuse can be blown when a current of 0.04 A or more flows. The fifth fuse may block an overcurrent that may flow from the power supply as the switch opens or closes.

5 shows an explosion proofing device 10 according to one embodiment. 5 shows only the receptacle 90 such as an explosion-proof LED and explosion-proof LEDs in the configuration of the explosion-proof device 10, but the explosion-proof device 10 is not limited to the solenoid valve 11, the relief valve 12, 20, a pressure gauge, a cooler 30, a heater 40, an explosion-proof equipment control apparatus 1000, and the like.

The explosion-proof equipment 10 further includes a receptacle 90 such as an explosion-proof LED and an explosion-proof LED. The receptacle 90 such as an explosion-proof LED accommodates an explosion-proof LED and applies power to the explosion-proof LED. The accommodating portion 90 such as an explosion-proof LED is disposed above the door 7 located on the front surface of the explosion-proof equipment 10. [

6 shows an explosion-proof LED luminaire associated with the explosion-proof equipment 10. Fig. Figure 7 shows an explosion-proof LED luminaire. 8 is a cross-sectional view taken along the line A-A 'in FIG. Fig. 9 is an enlarged view of the area B in Fig. 10 is a cross-sectional view cut along the line C-C 'in FIG. The explosion-proof LED lamp unit 100 includes a casing unit, an illumination unit 300 disposed inside the casing unit to irradiate light when power is applied thereto, a heat dissipation unit 300 coupled to the illumination unit 300 to cool the illumination unit 300, (400), and a cooling unit (500) that penetrates through the heat dissipation unit (400) and the casing unit and is coupled to both side surfaces of the casing unit and passes through the center so that external air flows therethrough to cool the heat dissipation unit .

The casing unit is formed to enclose the illumination unit 300 and the heat dissipation unit 400, and is configured to seal the interior for an explosion-proof function. More specifically, the casing unit includes a cylindrical case 210 having both open sides and a pair of openings to close the open sides of the case 210, and the cooling unit 500 is inserted into the through- 231 are formed on the side cover 230.

That is, the side cover 230 is disposed on both sides of the case 210 opened on both sides, and the cooling unit 500 is disposed inside the case 210, And each of the opposite ends is fastened to the side cover 230.

Further, the case 210 may be provided as a double case for further improving the explosion-proof performance. That is, as shown in the figure, the first case 211 is disposed to surround the illumination unit 300 and the heat dissipation unit 400, and the first case 211 is disposed to surround the first case 211, And a second case 212 which is provided to form a space between the first case 211 and the second case 212.

Here, the case 210 is preferably made of polycarbonate, tempered glass, or the like, which is transparent so that impact resistance is high and light is transmitted to the outside so as to have an explosion-proof function. Of course, the material of the case 210 is not limited thereto, but may be made of any material having high impact resistance and transparency.

Further, the case 210 may be coated with a conductive coating 213 in the form of a strip in the longitudinal direction. The conductive paint applied to the case 210 may contact the side cover 230 to prevent static electricity from being generated in the casing.

The conductive paint 213 may be applied to either the first case 211 or the second case 212 or may be applied to both the first case 211 and the second case 212, . For this, the side cover 230 is preferably made of a conductive metal and grounded.

The casing unit may further include a sealing member 240 to seal a portion where the case 210 and the side cover 230 are fastened. The sealing member 240 is disposed between the case 210 and the side cover 230 and is fixed to the side of the case 210 by the fastening force of the side cover 230 with respect to the cooling part 500. [ .

In addition, the casing unit may include a cable gland 250 in any one of the pair of side covers 230 so that a cable for supplying power to the illumination unit 300 may be drawn into the case 210.

In the case where a battery (not shown) is provided inside the case 210 to apply power to the illumination unit 300, the cable ground 250 may be provided in the side cover 230 have.

The illumination unit 300 is disposed inside the casing unit, and is adapted to emit light when power is applied thereto, and to irradiate the light to the outside.

More specifically, the illumination unit 300 includes a circuit board 310 on which a circuit is formed and disposed on the heat dissipation unit 400, and a circuit that is disposed on a circuit formed on the circuit board 310, And may be provided with a plurality of LEDs 320 that emit light.

The heat dissipation unit 400 is coupled to the circuit board 310 to cool the circuit board 310 and the LED 320.

The heat dissipation unit 400 includes a heat dissipation unit body 410 having a plane formed at one side thereof and fastened to the circuit board 310 and a heat dissipation unit 410 formed in a longitudinal direction of the heat dissipation unit body 410, An insertion hole 420 into which the heat sink 500 is inserted and a plurality of heat dissipation fins 430 protruding from the other side of the heat dissipation body 410.

That is, the cooling unit 500 is inserted into the insertion hole 420 formed in the heat dissipation unit 400 in the longitudinal direction of the heat dissipation unit body 410, and the cooling unit 500 has a center The cooling unit 500 is configured to cool the heat dissipation unit 400 heated by the illumination unit 300 to increase the heat dissipation efficiency of the heat dissipation unit 400 have.

The cooling unit 500 penetrates through the heat dissipation unit 400 and the casing unit and is coupled to both sides of the casing unit. The cooling unit 500 is centrally formed to flow outside air to cool the heat dissipation unit 400.

To this end, the cooling unit 500 is formed in a rod shape having a center through which the outside air flows. Therefore, since the outside air flows to the center of the cooling part 500, the cooling part 500 is cooled by heat exchange with the flowing air, and the cooling part 500 is fastened to the heat radiating part 400 So that the cooling unit 500 can cool the heat dissipation unit 400.

The cooling unit 500 is formed with threads 510 at both ends and a nut 260 is fastened to an end protruding through the through hole 231 of the side cover 230 to form a pair of side covers 230 Are tightly fitted to both sides of the case 210.

Therefore, even if an explosion occurs in the case 210, the cooling unit 500 can prevent the side cover 230 from being detached from the case 210, The force exerted on the case 210 can be resisted with a greater force.

The side cover 230 and the nut 260 are inserted into both ends of the cooling unit 500 for sealing the side cover 230 and the cooling unit 500, And the washer 270 is inserted into both ends of the cooling part 500 and is disposed between the side cover 230 and the washer 270. The fastening force of the nut 260 prevents the side cover 230 And an O-ring 280 for sealing the through-hole 231.

With this configuration, the cooling part 500 capable of performing heat exchange with the outside air is fastened to the heat dissipation part 400 for cooling the illumination part 300, so that the heat dissipation performance of the heat dissipation part 400 can be improved, The side cover 230 is coupled to both sides of the case 210 while connecting the pair of side covers 230 to each other so that the fastening force of the side cover 230 is improved and the explosion- .

11 illustrates an explosion proofing device 10 according to one embodiment. 11 shows only the cooler 30, the heater 40 and the temperature sensor for explosion-proof in the configuration of the explosion-proof equipment 10. However, the explosion-proof equipment 10 is not limited to the solenoid valve 11, the relief valve 12, It is apparent that the compressor 20 further includes a pressure gauge, a cooler 30, a heater 40, an explosion-proof equipment control apparatus 1000, and the like.

An explosion proof device (10) for storing an explosion-proof object therein is inserted into a groove (9) formed in the front face of the explosion proof device (10) and controls the explosion proof device (10). A solenoid valve (11) for introducing a compressed gas into the explosion proof device (10); A relief valve (12) for discharging fluid inside the explosion-proof equipment (10); An explosion-proof temperature sensor disposed on the inner wall of the explosion-proof equipment; A cooler 30 disposed on the inner wall of the explosion-proof device 10; A heater (40) disposed on the inner wall of the explosion-proof device (10); The explosion-proof equipment control apparatus 1000 includes a control unit 1100 for controlling the explosion-proof equipment control apparatus 1000. When the temperature received from the explosion-proof temperature sensor is lower than -20 degrees, A heater driving unit 1260 for driving the heater 40; And a cooler driving unit 1270 for driving the cooler 30 when the temperature received from the explosion-proof temperature sensor is 40 degrees or more.

The explosion-proof equipment control apparatus 1000 is inserted into a groove 9 formed on the front face of the explosion-proof equipment 10 and controls the explosion-proof equipment 10. The explosion-proof equipment control apparatus 1000 has been described in detail above.

The solenoid valve (11) introduces the compressed gas into the explosion proof equipment (10). Compressed gas is supplied into the explosion-proof equipment (10) through the solenoid valve (11). That is, when the solenoid valve 11 is opened, the compressed gas flows into the explosion-proof device 10, and when the solenoid valve 11 is closed, the compressed gas can not flow into the explosion-proof device 10.

A relief valve (12) discharges fluid inside the explosion-proof equipment (10). The relief valve 12 discharges the fluid inside the explosion-proof equipment 10 to the outside of the explosion-proof equipment 10 or cuts off the discharge. That is, when the relief valve 12 is opened, the fluid inside the explosion-proof equipment 10 is discharged outside the explosion-proof equipment 10. [ Further, when the relief valve 12 is closed, the discharge of the fluid present in the explosion-proof equipment 10 is cut off.

The explosion-proof type temperature sensor is disposed on the inner wall of the explosion-proof equipment (10). In detail, the explosion-proof type temperature sensor is disposed on the inner upper surface, the left surface, the right surface, and the lower surface of the explosion-proof equipment 10. The explosion-proof type temperature sensor will be described later in detail.

The cooler (30) is disposed on the inner wall of the explosion-proof equipment (10). The cooler 30 is an air cooler (Vortex cooler) and disposed on the top surface of the explosion-proof equipment 10.

The heater (40) is disposed on the inner wall of the explosion-proof equipment (10). The heater (40) can output heat through a juxtaposition generated by flowing a current to a resistance wire or the like. The heater (40) is disposed on the underside of the explosion-proof equipment (10).

The explosion-proof equipment control apparatus 1000 includes a controller 1100 for controlling the explosion-proof equipment 1000. When the temperature received from the explosion-proof temperature sensor is less than -20 degrees, the controller 1100 controls the heater- (1260); And a cooler driving unit 1270 for driving the cooler 30 when the temperature received from the explosion-proof temperature sensor is 40 degrees or more.

The control unit 1100 has been described above, and the control unit 1100 further includes a heater driving unit 1260 and a cooler driving unit 1270.

The heater driving unit 1260 drives the heater 40 when the temperature received from the explosion-proof temperature sensor is -20 degrees or less. The explosion-proof warming sensor transmits the measured temperature in real time to the explosion-proof equipment control apparatus 1000. The heater driving unit 1260 drives the heater 40 when the explosion-proof equipment 10 has an internal temperature of -20 degrees or less. If the internal temperature of the explosion-proof equipment 10 is less than -20 degrees, at least a part of the configuration of the explosion-proof equipment 10 may malfunction.

More specifically, the heater driving unit 1260 drives the heater 40 (not shown) if the temperature received from at least one of the explosion-proof temperature sensors disposed on the upper, left, right, and lower surfaces of the explosion- .

The cooler driving unit 1270 drives the cooler 30 when the temperature received from the explosion-proof temperature sensor is 40 degrees or more. If the internal temperature of the explosion-proof equipment 10 is 40 degrees or more, at least a part of the configuration of the explosion-proof equipment 10 may malfunction.

More specifically, the cooler driving unit 1270 controls the cooler 30 when the temperature received from at least one of the explosion-proof temperature sensors disposed on the upper, left, right, and lower surfaces of the explosion- .

Due to the cooler 30 and the heater 40, the internal temperature of the explosion-proof equipment 10 can be maintained within a range of -20 degrees to 40 degrees.

The relief valve (12) is formed on an upper portion or a lower portion of one side of the hexagon, and the solenoid valve (11) is connected to the relief valve (12) The relief valve 12 is formed at the lower part of the surface facing the one surface and when the relief valve 12 is formed at the lower surface of the one surface,

That is, when the solenoid valve 11 is disposed on the upper right side of the explosion proofing apparatus 10, the relief valve 12 is disposed at the lower left side of the inside of the explosion proofing apparatus 10. The compressed gas flows through the solenoid valve 11 and the fluid in the explosion-proof equipment 10 is discharged through the relief valve 12. [ When the flammable gas heavier than the compressed gas flows into the explosion-proof device 10, the flammable gas is introduced into the explosion-proof device 10 due to the compressed gas flowing through the solenoid valve 11 on the right- And can be discharged through the relief valve 12 in the lower part of the inner left side surface.

Further, when the solenoid valve 11 is disposed at the lower right side of the inside of the explosion-proof equipment 10, the relief valve 12 is disposed at the upper left side of the inside of the explosion-proof equipment 10. The compressed gas flows through the solenoid valve 11 and the fluid in the explosion-proof equipment 10 is discharged through the relief valve 12. [ When the flammable gas, which is lighter than the compressed gas, flows into the explosion-proof equipment 10, the flammable gas is introduced into the explosion-proof equipment 10 due to the compressed gas flowing through the solenoid valve 11, And through the relief valve 12 on the upper left side of the inner surface.

Fig. 12 shows an explosion-proof temperature sensor. Fig. 13 is a cross-sectional view of the protection tube in the longitudinal direction taken along the line of the explosion-proof temperature sensor. Fig. 14 is a cross-sectional view of the protective pipe in the width direction in the explosion-proof temperature sensor. Fig. Fig. 15 shows a state in which an elastic body is provided in the explosion-proof temperature sensor.

The explosion-proof temperature sensor 101 according to the embodiment of the present invention includes a protective tube 110 having an insulating layer 120 formed on its inner surface and one side opened, a sensing part 110 inserted into the protective tube 110, A lead wire 140 connected to the sensing unit 130 for electrically connecting the sensing unit 130 and the measurement unit (not shown), and a sensing unit 130 connected to the sensing unit 130 And a fixing part 150 for fixing the protection tube 110 to have a predetermined gap with the inner surface.

The protection tube 110 is hollow and has one side opened to insert the sensing unit 130 therein. The protective pipe 110 may be provided in a cylindrical shape as shown in FIG. 14 (a) or may be provided in a rectangular box shape as shown in FIG. 14 (b).

The protection tube 110 has an insulating layer 120 on its inner surface for insulation. Here, the insulating layer 120 is formed as an oxide layer having a thickness capable of withstanding an internal voltage of 500 to 1000 V by oxidizing the inner surface of the protective pipe 110.

That is, since the protection tube 110 is made of a metal material, if the inner surface is oxidized to form an oxide layer having a certain thickness, the protection tube 110, which is a metal material, can sustain the withstand voltage of 500 to 1000 V, ) Or the lead wire 140 to prevent sparking or the like instantly from being formed.

Here, the protective pipe 110 may be made of stainless steel (SUS304) or aluminum. Accordingly, the protective pipe 110 is made of a metal material such as stainless steel or aluminum, and an oxide film layer can be formed on the inner surface of the protective pipe 110 according to various methods known in the art.

The sensing unit 130 is inserted into the protective pipe 110 and disposed on the end side to sense the temperature. The sensing unit 130 may be an RTD sensor, a bimetal sensor, a thermocouple sensor, or the like, and is sensitive to temperature changes to sense the temperature.

The sensing unit 130 is provided with a pair of terminals 131 to which the lead wire 140 is welded.

The lead wire 140 is made of a conductive material such as copper or the like and is covered with a non-conductive material such as rubber.

Both ends of the lead wire 140 are peeled off and one end of the lead wire 140 is connected to the terminal 131 of the sensing unit 130 and the other end of the lead wire 140 is connected to the measuring unit. The lead wire 140 is surrounded by the heat shrinkable tube 180 at a portion where the lead wire 140 and the terminal portion 141 are connected to insulate a portion where the lead wire 140 and the terminal portion 141 are connected. Of course, it is also possible to insulate by attaching an insulating tape.

Although three lead wires 140 are shown in the figure, the present invention is not limited thereto and two or four lead wires 140 may be provided. That is, the lead wire 140 may be provided in a required number for precise temperature measurement of the sensing unit 130 at all times.

For example, when the sensing unit 130 is provided as an RTD sensor, three lead wires 140 are provided. As shown in FIG. 2, two lead wires are connected to one terminal, and one lead wire is connected to the other And is connected to one terminal. In the case of the RTD sensor, since the temperature is measured from the change in the resistance value depending on the temperature, if the distance between the measuring part and the sensing part becomes long, that is, if the length of the lead wire becomes long, Therefore, three lead wires are used to measure the resistance value of the sensor by compensating the inherent resistance value of the lead wire.

The lead wire 140 protruding outward from the protective pipe 110 is provided to a length required by the user and is inserted into the protective cover 160 so that the lead wire 140 is not bent over a certain angle. And is provided to surround the lead wire 140.

The protective cover 160 may be a metal braid. Since the metal braid is not bent over a certain angle, it is possible to prevent the lead wire 140 from being folded. That is, it is possible to prevent the lead wire 140 from being folded or folded or broken.

The fixing unit 150 is provided to fix the sensing unit 130 to the protective pipe 110 so as to have a predetermined gap with the inner surface of the protective pipe 110. More specifically, the fixing portion 150 includes an insulating material 151 filled in the protective tube 110, and an insulating material 151 filled in the protective tube 110 at the rear of the insulating material 151, And is provided with an adhesive 152 for sealing the open side of the fixing part 150 so as to protrude outward.

That is, the sensing unit 130 is inserted into the protective tube 110, and the sensing unit 130 is spaced apart from the inner surface of the protection tube 110 by a predetermined gap. The insulating member 151 is inserted into the protective tube 110 so that the adhesive agent 152 is put in the rear of the filled insulating member 151 to seal the open side of the protective tube 110, The sensing unit 130 is fixed. Here, the insulating material 151 may be formed of powdery MgO, and the adhesive may be formed of epoxy.

Since the oxide layer is formed on the inner surface of the protective tube 110 according to the thickness of the insulating layer 120, the sensing portion 130 may be spaced apart from the insulating layer 120 by a predetermined gap Or the sensing unit 130 may be disposed in contact with the insulating layer 120. [

4, the explosion-proof temperature sensor 101 according to the embodiment of the present invention includes an elastic body 170 elastically supporting the protective tube 110 and the lead wire 140 such that the protective tube 110 and the lead wire 140 are not bent more than a predetermined angle. ).

That is, the elastic body 170 is provided by a spring, and is disposed so as to enclose the protection tube 110 and the protection cover 160 in conjunction with each other. Therefore, the lead wire 140 exposed at the end of the protective pipe 110 is prevented from being folded due to the rigidity of the elastic body 170, thereby preventing the lead wire 140 from being short-circuited or damaged.

In this configuration, an insulating layer, which is an oxide film layer, is provided on the inner surface of the protective pipe 110 made of a metal material, and an arc-like or spark is generated in the temperature sensor by filling an insulating material such as MgO between the sensing portion and the oxide film layer Can be completely blocked.

16 is a flowchart showing the manufacturing method of the explosion-proof temperature sensor.

Referring to FIG. 16, an explosion-proof temperature sensor manufacturing method according to an embodiment of the present invention includes an insulating layer forming step (S110) for forming an insulating layer on an inner surface of a protective pipe with one side opened, A sensing part inserting step (S130) for inserting the sensing part connected to a lead wire to the protective pipe, and a sensing part fixing the sensing part to have a certain gap from the inner surface of the protective pipe And a fixing step.

In the step of securing the sensing part, an insulating material filling step (S140) for filling the insulating material inside the protective tube so that the sensing part is locked, and a step of inserting an adhesive agent in the rear of the insulating material A filling step of filling adhesive (S150), and a curing step (S160) in which the protective tube is cured while being filled with an insulating material and an adhesive.

Here, the insulating layer forming step (S110) oxidizes the inner surface of the protective tube to form an oxide layer having a thickness capable of withstanding withstand voltage of 500 to 1000V.

That is, since the protection tube is made of a metal material, the inner surface is oxidized to form an oxide layer having a predetermined thickness. When the oxide film layer having a predetermined thickness is formed on the inner surface of the protective pipe, it is able to withstand the withstand voltage of 500 to 1000 V, so that the protective pipe always comes into contact with the sensing part or the lead wire.

Here, the protective pipe may be made of stainless steel (SUS304) or aluminum. For example, when the protective tube is made of stainless steel, an oxidative gas may be introduced into the protective tube, and an oxide film layer (Cr2O3) may be formed by heating at a temperature ranging from about 700 to about 1100 ° C for a certain period of time.

Alternatively, when the protective pipe is made of an aluminum material, an oxide layer, that is, an alumina ceramic layer (Al 2 O 3) may be formed on the inner surface of the protective pipe by an electric and chemical method. An anodizing surface treatment method is known as an oxide layer formation method, which is a known technique, and a detailed description thereof will be omitted.

Therefore, the protective pipe may be made of a metal material such as stainless steel or aluminum, and an oxide film layer may be formed on the inner surface of the protective pipe according to various methods known in the art.

In the lead wire connection step (S120), since the lead wire is coated with the cover, the cover is peeled off at both ends, and one end is welded to the terminal of the sensing part. A terminal portion connected to the measuring portion is connected to the other end of the lead wire. In order to insulate a portion connecting the lead wire and the terminal portion, a heat-shrinkable tube is inserted into a portion where the lead wire and the terminal portion are connected, and heat is applied to the heat-shrinkable tube to shrink it.

The sensing unit inserting step (S130) inserts the sensing unit with a certain gap from the inner surface of the protective pipe.

Since the oxide layer, which is an insulating layer, is formed on the inner surface of the protective tube, the sensing portion may be spaced apart from the insulating layer so as to have a predetermined gap with the insulating layer, or the sensing portion may contact the insulating layer .

In this state, the insulator is injected into the protective pipe so that the sensing unit is locked. At this time, the space is left to a certain extent so that the adhesive can be input, and the insulating material is filled.

Thereafter, the adhesive is applied to the rear side of the protective tube filled with the insulating material, and then cured for a predetermined time at a predetermined temperature to seal the open side of the protective tube and fix the sensing unit.

Here, the insulating material may be a powdery MgO, and the adhesive may be epoxy. At this time, when the protective tube is filled with powdery MgO and epoxy, it is cured at a temperature of 80 ° C for about 8 to 16 hours.

The method for manufacturing an explosion-proof temperature sensor according to an embodiment of the present invention may further include a protective cover mounting step (S170) and an elastic member mounting step (S180) to protect the lead wire.

The protective cover installing step S170 is provided to cover the plurality of lead wires protruding outward from the protective pipe. The protective cover is provided with a metal braid to protect the lead wire from bending over a certain angle.

Here, in the case of using a multi-cable provided with a plurality of lead wires surrounded by a metal braid, the step of installing the protective cover (S170) may be omitted.

That is, in the case of using the multi-cable, after the metal braids at both ends are partially removed in the lead wire connection step (S120), the cover of the lead wire is removed and the lead wire is welded to the sensing part.

In the elastic member mounting step (S180), an elastic body is installed so as to enclose and enclose the protective pipe and the protective cover. Here, the elastic body is provided with a spring to prevent the lead wire exposed at the end of the protective pipe from being folded due to the rigidity of the elastic body, thereby preventing the lead wire from being short-circuited or damaged.

17 is a graph showing the purge flow rate in accordance with the pressure inside the explosion-proof equipment 10. FIG.

The graph of FIG. 17 shows the flow rate of the fluid discharged when the relief valve 12 is opened according to the pressure inside the explosion-proof equipment 10. FIG. 17 is the model name of the relief valve 12, and the number in front of the model name is the number of the relief valves 12. As the number of relief valves 12 increases from 1 to 2, 3, it can be seen that the purge flow rate is increased at the internal pressure of the explosion-proof equipment 10. [

The present invention is not limited to the above-described embodiment and the accompanying drawings, but is intended to be limited by the appended claims. It will be apparent to those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. something to do.

10: Explosion-proof equipment
11: Solenoid valve
12: relief valve
20: Compressor
30: Cooler
40: heater
90: explosion-proof LED etc. receptacle
100: explosion-proof LED
101: Temperature sensor for explosion-proof
1000: Explosion-proof equipment control device
1100:
1110: Minimum pressure setting section
1120: Alarm generating pressure setting unit
1130: normal pressure setting section
1140: Hysteresis pressure setting unit
1150: Purge pressure setting section
1160: Maximum pressure setting section
1170: Purge time calculating section
1180: Output section
1190:
1200: Solenoid valve driving part
1210: Relief valve driving part
1220:
1230: Display
1240: The alarm

Claims (2)

Explosion-proof equipment that stores explosion-proof objects inside
An explosion-proof equipment control device inserted into a groove formed in the front face of the explosion-proof equipment and controlling the explosion-proof equipment;
A solenoid valve for introducing compressed gas into the explosion-proof equipment;
A relief valve for discharging fluid in the explosion-proof device;
An explosion-proof temperature sensor disposed on the inner wall of the explosion-proof device;
A cooler disposed on an inner wall of the explosion-proof device;
A heater disposed on an inner wall of the explosion-proof device;
Wherein the explosion-proof equipment control device includes a control unit for controlling the explosion-proof equipment control device as a whole,
The control unit
A heater driving unit for driving the heater when the temperature received from the explosion-proof temperature sensor is -20 degrees or less; And
And a cooler driving unit for driving the cooler when the temperature received from the explosion-proof temperature sensor is 40 degrees or more,
The control unit includes: a solenoid valve driving unit for driving a solenoid valve for introducing the compressed gas into the explosion-proof equipment; And a relief valve driving unit for driving a relief valve for discharging the fluid inside the explosion-proof equipment to the outside
Explosion-proof equipment.

The method according to claim 1,
The explosion-
In this embodiment,
Wherein the relief valve is formed at an upper portion or a lower portion of any one of the six sides,
The solenoid valve includes:
Wherein the relief valve is formed at a lower portion of a surface facing the one surface when the relief valve is formed on the upper surface of the one surface,
Explosion-proof equipment.

Images