KR20210081479A - Pressurizing Apparatus for Pressure Explosion Proof and the System with automatic Pressure Adjustment - Google Patents

Abstract

The present invention relates to a pressure explosion-proof pressurization device and system that provide a pressure explosion-proof function. Specifically, the present invention relates to the pressure explosion-proof pressurization device capable of automatic pressure compensation and the system thereof that can reduce an amount of air consumption and remove an operational instability of the pressure explosion-proof part while maintaining a pressure of an internal space of the pressure explosion-proof part comprising an electronic device that requires a pressure explosion-proof function at a certain level. The present invention comprises: an automatic flow rate adjustment part; a measurement part; a fuzzy controller part; and a switching part.

Description

A pressure explosion-proof pressurization device capable of automatic pressure compensation and a pressure explosion-proof system including the same

The present invention relates to a pressure explosion-proof pressurization device and system that provides a pressure explosion-proof function, and in particular, reduces the air consumption while maintaining the pressure of the internal space of the pressure explosion-proof part including the electronic device requiring the pressure explosion-proof function at a certain level. And it relates to a pressure explosion-proof pressurization device capable of automatic pressure compensation that can eliminate the operational instability of the pressure explosion-proof part and its system.

Electronic equipment including electronic equipment (hereinafter, 'pressure explosion-proof part') is constituted by various electronic equipment and a housing surrounding the electronic equipment. And, the inside of the housing is made of an electronic device and an internal space surrounding it. For example, FIG. 1 is an example of a ballast water treatment apparatus. The applicant has registered the ballast water treatment device shown in FIG. 1 as Republic of Korea Patent No. 10-1412707 “Ballast water UV treatment device with pressure explosion-proof structure”. Since ships are equipped with numerous pressure explosion-proof parts and are operated in the sea, they must be sufficiently protected from various explosions and fires. However, various explosive gases generated during the operation of a ship frequently flow into the pressure explosion-proof part, which causes various explosion accidents due to sparks generated in the pressure explosion-proof part. Therefore, in order to prevent this, the pressure explosion-proof part mounted on the ship is required to be equipped with an explosion-proof function, and the applicant's patent shown in FIG. 1 is also equipped with such a function. Of course, it is natural that the pressure explosion-proof part requiring the explosion-proof function is not limited to the ship. 2 is a block diagram of a conventional explosion-proof pressurization device. According to FIG. 2, the explosion-proof pressurization device uses the air supplied to the air splier 5 to interlock with the purge controller to discharge the explosive gas in the explosion-proof space S of the pressure explosion-proof part 2 to the outside. At the outlet 25 of the automatic on-off valve 41 and the manual needle valve 43 for maintaining a constant pressure in the explosion-proof space (S), and the pressure-explosion-proof part (2) at the outlet 25 It is located and includes a measuring unit 6 for measuring the flow rate of discharged air or positive pressure in the explosion-proof space, and a purge controller unit 1 for controlling the valve unit 4 by receiving a signal from the measuring unit. The air splier 5 supplies air of a predetermined pressure, and the automatic on-off valve 41 of the valve part 4, the explosion-proof space (S) to the outside to discharge the explosive gas that may or may exist inside the In order to perform the operation (hereinafter, referred to as 'purging'), the air supplied from the air splier 5 is provided into the explosion-proof space 21 of the pressure explosion-proof part 2 by being opened for a predetermined period of time. The automatic on-off valve 41 receives a signal from the purge controller unit 1 and performs only an on-off operation of opening or closing the flow path, not only does not control the flow rate of air, but also a pressure explosion-proof unit that requires purging. Since the pressure or flow rate of the air supplied to the pressure explosion-proof unit that requires purging varies depending on whether air is used in other devices, etc., the pressure explosion-proof unit that requires an explosion-proof function is set to always provide more than the standard value for smooth purging. There is a problem of consuming too much air.

In addition, the measuring unit 6 includes a pressure measuring sensor 63 for measuring the pressure in the explosion-proof space S, and a flow measuring sensor 61 for measuring the flow rate of air at the outlet 25 of the pressure-explosion-proof part. do. The pressure measuring sensor 63 has one end of the pressure measuring tube 631 extended into the explosion-proof space S to measure the internal pressure. In this way, if the flow rate measured by the flow sensor is less than the standard value or/and the internal pressure measured by the pressure sensor is less than the standard value, it is judged that there is a problem in the purging operation, reset the entire system, and then restart A purging operation is performed. And, when the purging operation is in progress, the power switch 3 is off to maintain the state in which the power supply to the electronic device is cut off, and the operation of the pressure explosion-proof unit is stopped.

And, when the purging operation is smoothly completed, the automatic on-off valve 41 is closed and the manual needle valve 43 is manually opened. The operation of maintaining the pressure inside the explosion-proof space (S) at a pressure greater than or equal to a certain value compared to the external pressure by the air supplied through the manual needle valve, so that the internal pressure is higher than the external pressure (hereinafter, 'pressurization') ') is performed. The difference in pressure is usually called positive pressure. In the process of performing the pressurization operation, the pressure measuring sensor 63 of the measuring unit measures the positive pressure to measure the positive pressure, and the flow rate measuring sensor 61 measures the flow rate and transmits it to the purge controller 1 . When performing the pressurization operation, the purge controller unit 1 controls the power switch 3 to switch to the ON operation to supply power to the electronic device 21 to switch the pressure explosion-proof unit 2 to the operating state. When the positive pressure and/or the flow rate falls below the reference value, the purge controller 1 cuts off the power of the corresponding pressure explosion-proof part to stop the operation of the pressure explosion-proof part. In this case, the operator manually operates the manual needle valve to set the internal positive pressure or flow rate to a reference value, and then performs the pressurization operation again. In this way, if a problem occurs in pressure or flow rate during the pressurization operation, the operation of the pressure explosion-proof part is inevitably caused because it is necessary to cut off the power of the pressure explosion-proof part and stop the operation.

In addition, in the conventional pressure explosion-proof part 2, the inlet 23 through which the air is introduced and the outlet 25 through which the air is discharged are located in opposite directions, so that the space for maintenance is located in the direction in which the inlet and the outlet are located, respectively. I need this. In particular, in the case of a ship in which a lot of equipment is mounted in a narrow space, there is a difficulty in installation/maintenance of the pressure explosion-proof part.

Republic of Korea Patent 10-1412707 "Ballast water UV treatment device with pressure explosion-proof structure"

The present invention has been devised to solve the problems of the prior art, and an object of the present invention is to automatically control the pressure in the explosion-proof space according to the pressure in the explosion-proof space and/or the air flow rate at the outlet measured during the purging operation. It is to provide a pressure explosion-proof pressurization device capable of automatic pressure compensation to keep the overflow rate constant at all times.

Another object of the present invention is a pressure explosion-proof pressurization device capable of automatic pressure correction capable of reducing excessive air consumption by controlling the flow rate of inflow air based on the air flow rate and/or pressure measured at the outlet during the purging operation is to provide

Another object of the present invention is to provide a pressure explosion-proof pressurization device capable of automatic pressure correction that can secure the operation stability of the equipment because it is possible to control the flow rate and/or pressure without shutting off the power of the pressure explosion-proof unit during the pressurization operation. will be.

Another object of the present invention is a pressure explosion-proof pressurization device capable of automatic pressure compensation that can increase the convenience of installation or maintenance in a narrow space by making the inlet through which the air is introduced and the outlet through which the air is discharged are located on the same side. is to provide

Another object of the present invention is to extend the air supply line into the explosion-proof space and direct the air injection nozzle to the exit direction so that the air can be sprayed in the exit direction in the explosion-proof space, thereby reducing the purging operation time. It is to provide a pressure explosion-proof pressurization device capable of automatic pressure compensation that can increase the operating efficiency of equipment.

Another object of the present invention is to increase the convenience of installation or maintenance in a narrow space by making the air inlet and the air outlet located on the same side, and further extend the air supply line into the explosion-proof space And by directing the air jet nozzle to the outlet direction so that the air can be sprayed in the direction of the outlet in the explosion-proof space, the purging operation time can be reduced and automatic pressure compensation that can increase the operating efficiency of the equipment is possible. to provide the device.

Another object of the present invention is to provide a purge controller unit having a higher explosion-proof function by mounting a purge controller unit having a pressure-resistance proof function.

Another object of the present invention is to provide a fuzzy controller unit having an explosion-proof function capable of observing an internal display screen from the outside as well as a pressure-proof explosion-proof function by having a reinforced see-through unit.

Another object of the present invention is to provide a fuzzy controller unit having an explosion-proof function in which the reinforced see-through unit is in close contact with the cover using a pressing means for pressing the reinforced see-through unit in close contact with the cover.

Another object of the present invention is to provide a purge controller having an explosion-proof function that prevents the reinforced transparent part from being damaged by stress concentration by providing a pressing means for uniformly pressing a certain width of the outer peripheral surface of the reinforced see-through part.

Another object of the present invention is to provide a higher explosion-proof performance against impact or internal explosion by making the pressing means an annular ring having a through hole in the center to uniformly press a certain width of the outer peripheral surface of the reinforced see-through part. It is to provide a fuzzy controller with an explosion-proof function.

According to one embodiment of the present invention, the present invention is connected to the pressure explosion-proof unit in fluid communication with an automatic flow rate control unit for supplying air, and a measuring unit for measuring the pressure and the air flow rate of the pressure explosion-proof unit, The measuring unit It includes a purge controller unit for adjusting the air flow rate to receive the measurement value from the automatic flow rate control unit, and a switching unit for turning on/off power supply to the electronic device of the pressure explosion-proof unit.

According to another embodiment of the present invention, the measuring unit includes a pressure measuring sensor for measuring the pressure inside the pressure explosion-proof part and a flow rate measuring sensor for measuring the air flow rate at the outlet of the pressure explosion-proof part.

According to another embodiment of the present invention, in the present invention, the automatic flow rate control unit can adjust the air flow rate under the control of the purge controller unit, so that it is possible to control the pressure in the explosion-proof space of the pressure explosion-proof unit.

According to another embodiment of the present invention, the automatic flow control unit is characterized in that the throttle valve.

According to another embodiment of the present invention, the purge controller controls the switching unit to be turned off to cut off the power supply in the purging operation and turned on to permit the power supply in the pressing operation.

According to another embodiment of the present invention, the present invention, the pressure explosion-proof pressurization device as seen above,

It provides a pressure explosion-proof system including a pressure explosion-proof part that is pressure-explosion-proof by the pressure explosion-proof pressurization device.

According to another embodiment of the present invention, the pressure explosion-proof unit includes an inlet through which air is introduced, an outlet through which air is discharged, an explosion-proof space located between the inlet and the outlet, and an electronic device located in the explosion-proof space, , the inlet and outlet provide a pressure explosion-proof system located on the same plane.

According to another embodiment of the present invention, the present invention provides a pressure explosion-proof system further comprising an air supply line extending into the pressure explosion-proof part from the automatic flow rate control unit.

According to another embodiment of the present invention, the air supply line provides a pressure explosion-proof system further comprising an injection means disposed so that the injection direction faces the outlet.

According to another embodiment of the present invention, the present invention provides a pressure explosion-proof system in which at least one of the injection means is disposed.

According to another embodiment of the present invention, the injection means provides a pressure explosion-proof system that is arranged parallel to the surface on which the outlet is located.

According to another embodiment of the present invention, the present invention provides a pressure explosion-proof system further comprising an air supply line extending into the pressure explosion-proof part from the automatic flow rate control unit.

According to another embodiment of the present invention, the injection means, at least one or more provides a pressure explosion-proof system that is arranged parallel to the surface on which the outlet is located.

The present invention has the effect of automatically maintaining constant pressure and flow rate in the explosion-proof space according to the pressure in the explosion-proof space and/or the air flow rate at the outlet measured during the purging operation.

According to the present invention, the flow rate of the inflow air can be adjusted based on the air flow rate and/or pressure measured at the outlet during the purging operation, thereby reducing excessive air consumption.

According to the present invention, the flow rate and/or pressure can be adjusted without shutting off the power of the pressure explosion-proof unit during the pressurization operation, so that it is possible to achieve the effect of securing the operational stability of the equipment.

The present invention has the effect of increasing the convenience of installation or maintenance in a narrow space by allowing the inlet through which the air is introduced and the outlet through which the air is discharged are located on the same surface.

The present invention extends the air supply line into the explosion-proof space and directs the air injection nozzle in the exit direction so that the air can be sprayed in the exit direction in the explosion-proof space, thereby reducing the purging operation time, thereby reducing the operating efficiency of equipment can achieve the effect of increasing the

The present invention can increase the convenience of installation or maintenance in a narrow space by making the inlet through which the air flows in and the outlet at which the air flows out are located on the same side, and further extend the air supply line into the explosion-proof space and use the air jet nozzle The purging operation time can be reduced by directing the air to the outlet direction so that the air can be sprayed in the outlet direction in the explosion-proof space, thereby increasing the operating efficiency of the equipment.

The present invention can obtain the effect of providing a purge controller unit having a higher explosion-proof function by mounting the fuzzy controller unit having a pressure release function.

The present invention can obtain the effect of providing a fuzzy controller unit having an improved explosion-proof function capable of observing or manipulating the internal display screen from the outside as well as the explosion-proof function by having a reinforced see-through unit.

The present invention can achieve the effect of providing a fuzzy controller unit having an explosion-proof function in which the reinforced see-through unit is in close contact with the cover unit by using a pressing means for pressing the reinforced see-through unit in close contact with the cover.

The present invention can obtain the effect of providing a purge controller unit having an explosion-proof function to prevent the reinforced transparent portion from being damaged by stress concentration by providing a pressing means for uniformly pressing a certain width of the outer peripheral surface of the reinforced see-through portion.

The present invention has an explosion-proof function that provides a higher explosion-proof performance against impact or internal explosion by uniformly pressing a certain width of the outer peripheral surface of the reinforced see-through part by using the pressing means as an annular ring with a through hole in the center. It has the effect of providing a fuzzy controller.

1 is a view showing a conventional ballast water treatment device having a pressure explosion-proof function.
Figure 2 is a block diagram showing a conventional pressure explosion-proof pressurization device and pressure explosion-proof system.
3 is a block diagram showing a pressure explosion-proof pressurization device and a pressure explosion-proof system according to an embodiment of the present invention.
4 is a block diagram showing a pressure explosion-proof method of the pressure explosion-proof pressurization device shown in FIG.
5 is a block diagram showing a purging step of the pressure explosion-proof method shown in FIG.
Figure 6 is a block diagram showing a pressurization step of the pressure explosion-proof method shown in Figure 4;
7 is a block diagram showing a pressure explosion-proof system according to another embodiment of the present invention.
8 is a perspective view of a purge controller according to an embodiment of the present invention.
9 is an exploded perspective view of the purge controller shown in FIG. 8;
10 is a block diagram of a circuit portion of a fuzzy controller;
11 is a cross-sectional view of the fuzzy controller shown in FIG.
12 is a cross-sectional view of a cover of a purge controller unit;
13 is a cross-sectional view of the pressing means;
Fig. 14 is a cross-sectional view showing a coupling state between components of a fuzzy controller unit;

Hereinafter, a pressure explosion-proof pressurization device and a pressure explosion-proof system according to the present invention will be described with reference to the accompanying drawings. Unless otherwise defined, all terms in this specification have the same general meaning as understood by those of ordinary skill in the art to which the present invention belongs, and if they conflict with the meaning of the terms used in this specification, according to the definitions used herein. In addition, detailed descriptions of well-known functions and configurations irrelevant to the gist of the present invention will be omitted.

3 is a block diagram of a pressure explosion-proof pressurization device according to an embodiment of the present invention. As shown in FIG. 3, the pressure explosion-proof pressurization device is connected to the pressure explosion-proof part 2 to be in fluid communication with an automatic flow rate control unit 4 for supplying air, and a measuring part for measuring the pressure and the air flow rate of the pressure-explosion-proof part 2 (6) and a purge controller unit (1) for receiving the measurement value from the measurement unit and controlling the automatic flow rate control unit to adjust the air flow rate, and a switching unit for turning on/off the power supply to the electronic device of the pressure explosion-proof unit ( 3) is included.

The pressure explosion-proof pressurization device provides air from the air splier 5 to the pressure explosion-proof part 2 through the automatic flow control part 4, and the explosive gas inside the pressure explosion-proof part 2 is forcibly exhausted to the outside. After (that is, after the purging step), power is applied to the pressure explosion-proof unit to operate it, and air is continuously supplied to the inside during operation to maintain the pressure difference between the inside and the outside at a predetermined positive pressure (e.g., 50Pa) Block the inflow of the explosive gas into the explosion-proof space (S) of the pressure explosion-proof part (2) (that is, proceed with the pressurization step). In the purging step, if the air flow rate or positive pressure at the outlet falls below the standard value, the automatic flow rate control unit is controlled to increase the air flow rate. Since there is no need to go through the cumbersome process of regulating the supply pressure, the purging step can be performed quickly, and even in the pressurization step, the air flow rate or positive pressure at the outlet falls below the standard value or vice versa. Since the positive pressure can be controlled within a certain reference value range by controlling the automatic flow control unit in the state of not being blocked, the efficiency of device operation can be increased.

Here, the pressure explosion-proof unit refers to a device including the electronic device 21 and the explosion-proof space S therein, and may be the ballast water treatment device shown in FIG. 1 . The ballast water treatment system includes an 'ultraviolet sterilizer', and the 'ultraviolet sterilizer' sterilizes by irradiating ultraviolet rays to the ballast water, so that when the power is cut off, the operation of the ballast water treatment system is stopped. As in, it is possible to adjust the air flow rate without shutting off the power during the pressurization step, thereby increasing the operational efficiency of the ballast water treatment system, which is to cut off the power to the ballast water treatment system and then set the needle valve anew. And it is possible to guarantee higher operating efficiency of the device compared to the conventional technology that operated the processing device through the re-power supply process. Here, 'operational efficiency' refers to an improved ballast water treatment system compared to the prior art in which, when the power supply of the ballast water treatment device is cut off, the ballast water treatment is stopped, causing disruption to the operation of the ship, and further It means the efficiency of the operation of the ship.

And, the 'reference value' as seen above means a physical value that can be determined to be a desirable operating state in the purging step and the pressurizing step, and means a value determined by the user. It is preferred herein to be interpreted as meaning values for 'positive pressure' and/or 'flow' of 'air'. In addition, 'positive pressure' means a positive difference value between the pressure inside the pressure explosion-proof part and the pressure outside.

The automatic flow control unit 4 transmits the air supplied from the air splier 5 to the pressure explosion-proof unit 2, blocks the transmission, and controls the flow rate of the transmitted air. The pressure explosion-proof unit 2, especially the pressure It is configured to be in fluid communication with the inlet 23 of the explosion-proof part. The automatic flow rate control unit may be configured to be in fluid communication with the inlet of the pressure explosion-proof unit 2 through a normal pipe. The automatic flow rate control unit 4 receives a control signal from the purge controller unit 1 to perform the above operation, and receives an electrical signal to electrically transmit/block/control air flow. As such, it may preferably be an electric throttle valve. For example, the automatic flow rate control unit 4 may be opened by approximately 80% so that the positive pressure becomes approximately 2 mbar in the purging step, and may be opened by approximately 10% so that the positive pressure becomes approximately 0.52 mbar (50 Pa) in the pressing step.

The measuring unit 6 is located at the outlet 25 of the pressure explosion-proof unit and measures the flow rate of air discharged to the outlet and/or the positive pressure inside the pressure explosion-proof unit and transmits it to the purge controller unit 1, the flow rate measuring sensor 61 and a pressure measuring sensor 63. The flow rate measuring sensor 61 includes a measuring probe 611 disposed so that one end thereof is located inside the outlet 25, and the flow rate of the air flowing out to the outlet. will measure The pressure measuring sensor 631 is configured such that one end thereof extends into the explosion-proof space (S) to measure the positive pressure of the explosion-proof space (S). Normally, when the flow rate of air increases/decreases, the positive pressure also increases/decreases proportionally, but when the outlet is blocked or narrowed by foreign substances, the flow rate decreases but the positive pressure rises. It is possible to detect anomalies and to deal with them appropriately by providing a double. As seen above, in the purging step, since the automatic flow control means is largely opened, the measured flow rate and positive pressure are high, whereas in the pressurization step, the degree of opening is low, resulting in low values of the measured flow rate and positive pressure.

The fuzzy controller unit 1 receives the measurement value from the measurement unit and transmits a control signal to the automatic flow rate control unit or the switching unit 3 for control. 8 to 14 , the purge controller unit 1 includes a cover unit 10 , a reinforced see-through unit 11 , a pressing unit 12 , a circuit unit 13 , a barrier unit 14 , and a support unit. (16) and a housing portion (17).

As shown in FIG. 12, the cover part 10 is an extension flange 101 that protrudes along the outer periphery from the upper center to the inside to define a through-hole 101a, and is enlarged from one end of the extension flange to the outside. It includes an inner coupling surface 102 extending downward a certain length, an outer coupling surface 103 extending upward from the lower end of the inner coupling surface 102, and on the extension flange, the inner coupling surface, and the outer coupling surface. stipulated by

The extension flange 101 includes a through hole 101a in the center and is extended to the center and passes through a step to form a pressing surface 101b. The pressing surface 101b extends outward by a predetermined length from the stepped and is horizontal. is the side formed by

The inner coupling surface 102 is an inner surface extending down a certain length from one side of the pressing surface 101b of the extension flange, and a screw thread 102a is formed over the predetermined length. The screw thread 102a is to be described later. It is screwed with the pressing part so that the reinforced see-through part can be pressed toward the pressing surface.

The outer coupling surface 103 is an outer surface extending upward by a predetermined length from one end of the inner coupling surface to one side of the extension flange 101, and includes a screw thread 103a formed over a predetermined length. The screw thread 103a is coupled to a housing portion 17 to be described later.

The tempered see-through portion 11 is formed of a material that is transparent while having magnetic permeability and is not damaged even by an explosive force generated therein, and may preferably be formed of tempered glass. The reason why it should be transparent is that it should be possible to observe the display part of the circuit part to be described later with the naked eye, and the reason it should have magnetic permeability is because the operation part of the circuit part to be described later must be able to be operated using a magnet.

The pressing part 12 is formed in an annular annular shape having a predetermined width so as to equally press the reinforced see-through part to the pressing surface of the cover, and extending downward from one side of the pressing surface 122 and the pressing surface. an outer surface 121 . The pressing surface 122 is a surface extending horizontally while enclosing the through hole 123 while having a predetermined width, and is a surface in contact with the outer peripheral surface of the reinforced see-through part 11 . The outer surface 121 is a surface formed by extending a predetermined length downward from one side of the pressing surface, and includes a screw thread (121a). The screw thread (121a) is screwed with the screw thread (101a) of the inner coupling surface of the cover part, and the pressing surface 122 presses the reinforced see-through part to the pressing surface (101b) of the cover part. Through this process, the reinforced see-through portion is in contact with the cover portion uniformly, so that it is possible to increase the resistance to damage and internal explosion by impact. According to another embodiment of the present invention, the pressing unit 12 may further include a coupling hole 124 penetrating up and down on the pressing surface. The coupling hole 124 may be formed one at a time at symmetrical positions so as to transmit the rotational force by inserting and coupling the tool, through which the pressing part is screwed onto the cover and at the same time the reinforced see-through part 11 is attached to the cover. It is possible to adhere uniformly and airtightly to the pressing surface 101b.

10 and 14 , the circuit unit 13 includes an interface 131 and circuit boards 132 and 133 .

The interface 131 includes a display unit 131b showing the state of the automatic flow rate control unit 4, the switch 3, and the like, and an operation unit 131a including a magnetic switch operable by an external magnet. Accordingly, the operator can view various information displayed on the display unit 131b from the outside through the reinforced fluoroscopy unit, and can observe the state of the pressure explosion-proof pressurization device, as well as pressurize the pressure by operating the magnet switch by approaching the magnet from the outside. It becomes possible to manipulate the setting values and operating modes of the device. Here, the magnet switch means a switch configured to be controllable by magnetic force.

The circuit boards 132 and 133 are mounted on vertical posts 161 of the support 16 to be described later, and may be arranged in two stages as shown in FIGS. 9 and 14 . The circuit boards 132 and 133 include a transceiver 135 , a controller 136 , and a signal generator 137 as shown in FIG. 10 .

The transceiver 135 is an interface that is electrically connected to the automatic flow control unit 4 , the measurement unit 6 , and the switching unit 3 to transmit and receive various electrical signals.

The control unit 136 controls the pressing device throughout the purging step and the pressing step. In the purging step, the control unit 136 compares the measured values of the flow rate and positive pressure received from the measurement unit 6 with the reference values, and when the measured flow rate or positive pressure measurement value does not reach the reference value, the automatic flow rate control means is opened. The air flow rate is increased by transmitting a control signal that increases the rate, and vice versa, the air flow rate is decreased by generating and transmitting a control signal that decreases the opening rate. In addition, it is determined whether the purging step is completed by counting the set purging time, and when the flow rate and/or positive pressure falls below the reference value in the purging step, a control signal to proceed with the purging step again from the beginning is automatically generated by the flow control means (4) and It is transmitted to the switching unit (3). In the purging step, the switching unit 3 is controlled to cut off the power supply to the electronic devices of the pressure explosion-proof unit 2 .

In the pressurization step, the control unit 136 transmits a control signal proceeding to the pressurization step after the purging time is over to the automatic flow rate control unit 4 and the switching unit 3 to open the automatic flow rate control unit 4 to reduce the flow rate to reduce air consumption. In addition, a signal for controlling the switching unit 3 to apply power to the electronic device 21 of the pressure explosion-proof unit 2 is transmitted to the switching unit 3 .

The signal generator 137 generates various electrical signals necessary for performing the purging step and the pressing step under the control of the controller 136 .

The barrier part 14 is a well-known configuration that is located inside the fuzzy controller and serves to prevent the dangerous level of electrical energy generated inside from flowing to the outside. The barrier unit 14 may be configured as a barrier for electrical signals or power transmitted to the measuring unit and the automatic flow control unit.

The support 16 includes a vertical post 161 and a support plate 162 . One or more circuit boards 132 and 133 are mounted on the upper end of the vertical post 161, and a screw thread is formed at the opposite end thereof, so that the vertical post 161 is screwed to the bottom of the housing to firmly support the circuit board. The support plate 162 includes a flat plate 162a fixedly coupled to the bottom of the housing and a coupling rail 162b protruding upward in a ring shape with a predetermined length. Since the coupling rail 162b has a ring shape protruding upward from the flat plate, it is fitted into the inner coupling groove at the lower end of the barrier 14 to firmly support the barrier 14 .

The housing part 17 is a tubular member with an empty interior, and is coupled with the cover part 10 from the upper side while accommodating the components previously seen therein to completely seal the inside from the outside so that the explosion-proof function can be completed. do.

The housing portion 17 includes a lead-out inlet 171 through which various wires are drawn in/out on the side, and a screw thread 172 is formed on the inner circumferential surface of the upper end thereof.

Hereinafter, the coupling relationship of the fuzzy control unit 1 will be described with reference to FIG. 14 . The reinforced see-through part 11 is placed on the pressing surface 101b of the cover part 10, and the pressing part 12 is positioned on the opposite side of the cover part 10 in the cover part 10, and then the screw thread 121a of the pressing part is inserted into the cover part. After screwing into the screw thread 102a, a predetermined tool (not shown) is inserted into the coupling hole 124, and then rotated to press the pressing part 12 toward the pressing surface 101b of the cover part 10. . Through such a pressing process, the pressing surface 122 of the pressing part 12 and the pressing surface 101b of the cover part uniformly press the outer circumferential surface of the reinforced see-through part, thereby increasing the resistance to impact or internal explosion to damage the reinforced see-through part. can be prevented. Then, the circuit part 13 and the barrier part 14 are fixed to the support part 16, and the external thread 103a of the external coupling surface 103 of the cover part is coupled with the thread 172 of the housing part 17 to combine the cover part. and the housing portion are hermetically coupled.

The switching unit 3 is a switch for supplying or blocking power to the electronic device 21 of the pressure explosion-proof unit 2 , and is controlled by the purge controller unit 1 as seen above. In the purging step, the power is cut off, and in the pressurizing step, power is controlled to be supplied.

Hereinafter, a pressure explosion-proof method according to another embodiment of the present invention will be described with reference to FIGS. 4 to 6 .

4, the pressure explosion-proof method includes a pressure check step (S1), a purging step (S3), and a pressurization step (S5).

The pressure check step (S1) is a step of checking the pressure inside the explosion-proof space (S) of the pressure explosion-proof part (2). It determines the flow rate of air to be supplied during purging.

In the purging step (S3), by increasing the opening rate of the automatic flow rate control means 4, the inlet 23 of the pressure explosion-proof part 2 is supplied with air at a flow rate that forms a pressure enough to forcibly discharge the explosive gas therein. supplied through The purging step (S3) includes a first purging step (S31) and a second purging step (S33) as shown in FIG. The first purging step (S31) is a step in which the second purging step is carried out under the control of the purge controller unit 1, and the automatic flow rate control means 4 is opened in a small amount so that a small amount of air It is a warm-up step to be supplied to the explosion-proof space (S) for a predetermined time. During this process, the measuring unit 6 measures the flow rate and/or positive pressure and transmits it to the fuzzy controller unit 1, and the control unit of the fuzzy controller unit 1 controls the measured flow rate and/or positive pressure to a set reference value. After determining whether to satisfy the condition, it is determined whether to proceed to the second purging step (S33). If satisfied, the second purging step S33 is performed, otherwise, the first purging step is repeated. In the first purging step, it is preferable that the opening rate of the automatic flow control unit is usually about 10% and the positive pressure is about 0.52 mbar. The switching unit 3 is controlled so that the power is cut off. In the second purging step (S33), the purge controller unit 1 sharply raises the opening rate of the automatic flow rate control unit 4 to increase the supply flow rate to increase the pressure in the explosion-proof space S to form a high positive pressure. Most of the explosive gas is forcibly discharged to the outside through this process. In general, it is desirable to open about 80% and to form a positive pressure of about 2 mbar. Even in the process of the second purging step, the control unit of the fuzzy controller unit 1 checks the measured value transmitted from the measuring unit in real time and determines whether the measured value satisfies the reference value, and if it is less than the reference value, automatic flow rate control It transmits a control signal to increase the negative opening rate, and if it is higher than the reference value, a control signal to reduce the opening rate of the automatic flow control unit is transmitted to control the automatic flow control unit in real time, thereby reducing the amount of unnecessary air consumption.

The control unit of the purge controller unit 1 switches the automatic flow rate control unit 4 with a control signal to proceed with the pressurization step S5 when it is determined that the desired level of purging has been achieved during a predetermined purging time while monitoring the purging step. transfer to part (3). The switching unit is switched to apply power to the electric device 21 of the pressure explosion-proof unit, and the automatic flow control unit 4 proceeds with a pressurization step controlled to reduce the opening rate. In the pressurizing step (S5), the flow rate is adjusted so that the positive pressure of the explosion-proof space maintains a predetermined reference value, and it proceeds with a small positive pressure/flow rate compared to the purging step. In general, a reference value is set so that a positive pressure of about 0.52 mbar is maintained. As shown in FIG. 6 , the pressing step includes a reference positive pressure forming step (S51), a reference positive pressure checking step (S53), and a reference positive pressure maintaining step (S55). The reference positive pressure forming step (S51) is a step of supplying a predetermined flow rate of air to the explosion-proof space to form a positive pressure of a set reference value therein. The reference positive pressure checking step (S53) is a step of checking whether a positive pressure of a set reference value is formed during the pressurization step, and the control unit of the fuzzy controller unit 1 is based on the measurement value transmitted from the measurement unit 6 . It is a step to check the positive pressure by calculating the internal positive pressure. In the reference positive pressure maintenance step (S55), if the positive pressure satisfies the reference value, the opening rate of the automatic flow rate control unit 4 is maintained as it is, otherwise, the automatic flow rate control unit 4 ) by reducing or increasing the opening rate of the air supply to control the flow rate of the supplied air to control the internal positive pressure close to the standard value. Through the above process, it is possible to control the internal positive pressure to always satisfy the standard value without shutting off the power, so that the pressure explosion-proof part can be operated smoothly. As seen above, when the pressure explosion-proof part is a ballast water treatment device, since the power is not cut off, power is continuously supplied to the UV sterilizer to perform sterilization, so that the ballast water treatment device, furthermore, of the ship operational efficiency can be increased.

According to another embodiment of the present invention, the present invention provides a pressure explosion-proof system including the pressure explosion-proof pressurization device and the pressure explosion-proof part as seen above.

And, according to another embodiment of the present invention, the pressure explosion-proof part 2 is formed on one side of the electronic device 21, the explosion-proof space (S) surrounding the electronic device, the housing 27 surrounding them, and the housing It includes an inlet 23 and an outlet 25 . As shown in FIG. 7 , the inlet 23 and the outlet 25 are formed on the same surface of the housing 27 . Since the inlet 23 through which the air is introduced and the outlet 25 through which the air is discharged are located on the same surface, it is possible to increase the convenience of installation or maintenance in a narrow space such as a ship.

According to another embodiment of the present invention, as shown in FIG. 7 , one side of the air supply line 7 is connected so as to be in fluid communication with the outlet of the automatic flow control unit and the other side 71 is inside the housing 27 . , and then the air injection nozzles (71a, 71b, 71c) are directed in the direction of the outlet so that the air can be sprayed in the direction of the outlet in the explosion-proof space, thereby reducing the purging operation time and reducing the power cut-off time. It is possible to increase the operating efficiency of the equipment. According to another embodiment of the present invention, the other side 71 of the air supply line may be arranged parallel to the surface where the outlet is located. In addition, it is preferable that one air jet nozzle (71a, 71b, 71c) is disposed at the same level as the outlet (25) and the other is disposed above or below it.

Although the embodiments for implementing the technical idea of the present invention have been described above, it is construed that various modifications for implementing the technical idea also fall within the scope of the present invention.

Claims (14)

An automatic flow control unit connected to the pressure explosion-proof unit in fluid communication to supply air;
a measuring unit for measuring the pressure and air flow rate of the pressure explosion-proof unit;
A purge controller unit for receiving the measured value from the measurement unit and adjusting the air flow rate for controlling the automatic flow rate control unit;
A pressure explosion-proof pressurization device capable of automatic pressure correction including a switching unit for turning on/off power supply to the electronic device of the pressure explosion-proof unit. The pressure explosion-proof pressurization device of claim 1, wherein the measuring unit includes a pressure measuring sensor for measuring the pressure inside the pressure explosion-proof part and a flow measuring sensor for measuring the air flow at the outlet of the pressure explosion-proof part. The pressure explosion-proof pressurization device of claim 2, wherein the automatic flow rate control unit can adjust the air flow rate under the control of the purge controller unit, so that the pressure in the explosion-proof space of the pressure explosion-proof unit can be controlled automatically. The pressure explosion-proof pressurization device capable of automatic pressure correction according to claim 3, wherein the automatic flow control unit is a throttle valve. [Claim 5] The pressure explosion-proof pressurization device of claim 4, wherein the purge controller controls so that the switching unit is turned off to cut off the power supply in the purging operation and turned on to permit the power supply in the pressurization operation. The pressure explosion-proof pressurization device of any one of claims 1 to 5, and
A pressure explosion-proof system including a pressure explosion-proof part that is pressure-explosion-proof by the pressure explosion-proof pressurization device. According to claim 6, wherein the pressure explosion-proof part comprises an inlet through which air is introduced, an outlet through which air is discharged, an explosion-proof space positioned between the inlet and the outlet, and an electronic device positioned in the explosion-proof space, wherein the inlet and the outlet are the same. Pressure explosion-proof system located on the side. The pressure explosion-proof system according to claim 6, further comprising an air supply line extending from the automatic flow rate control unit into the pressure explosion-proof unit. The pressure explosion-proof system according to claim 8, wherein the air supply line further comprises an injection means arranged so that the injection direction faces the outlet. The pressure explosion-proof system according to claim 9, wherein at least one of the injection means is disposed. The pressure explosion-proof system according to claim 10, wherein the injection means is arranged parallel to a surface where the outlet is located. The pressure explosion-proof system according to claim 7, further comprising an air supply line extending into the pressure explosion-proof part from the automatic flow rate control part. 13. The pressure explosion-proof system according to claim 12, further comprising injection means arranged so that the injection direction faces the outlet. [Claim 14] The pressure explosion-proof system according to claim 13, wherein at least one of the injection means is arranged parallel to a surface on which the outlet is located.

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