JP5325414B2 - Rust prevention dehumidification device and system - Google Patents

Description

  The present invention relates to an improved rust prevention and dehumidification apparatus and system such as a room in a unit box constituting a bridge.

  Currently, Haneda Airport is undergoing re-expansion work, and it is planned to construct an airport with a part of it as a bridge. By the way, since the bridge is made of steel, a rust preventive paint is applied to prevent rust. However, the cost required for the paint increases as the structure becomes larger. However, this rust preventive paint also needs to be repainted every several years, and the cost for this is enormous and has a problem of high cost. On the other hand, a system that improves the corrosive environment by keeping the inside of the bridge unit secret, minimizing the inflow from the outside as much as possible, suppressing the entry of salt and moisture, and the like.

  However, it is difficult to form a completely sealed body, and although a small amount of air flows into the gap, if this wet gap wind enters the inside, dew condensation occurs when an internal and external temperature difference occurs. As a result, rust is generated by the dew condensation water simultaneously contacting the steel and oxygen.

In addition, for example, when an airport is provided on the sea side, instead of land reclamation, it is conceivable that a plurality of unit boxes are connected to form a pier-like shape. It is conceivable that air is circulated to take moisture inside.
However, when the scale is increased, the air volume of the dry air sent to the inside is increased, and the performance of the blower for that purpose is also increased. Therefore, the running cost for rust prevention cannot be neglected.

Further, when the device is made of steel, a great problem is that a large stress is applied to the entire bridge due to the difference between the temperature of the outer surface and, for example, the temperature expansion of the inner surface when contacting the sea surface.
If the scale is large, the load on the box may be broken or distorted. In the case of an airport, balance the pressure inside the unit box so that no stress is applied. Has become a technical challenge.
Because of this problem, it has already been proposed as a rust prevention and dehumidification device and system. Under such circumstances, it is required to conduct an internal inspection, so ventilation (outside air) is implemented for environmental conservation. Although it is preferable for the inspection work, the point is unsolved at present.
JP 2000-97586 A

The present invention provides a rust dehumidifier for anticorrosive steel units Hakonai by preventing indoor humidity, the outside air after the moisture of the indoor air is absorbed to the outside air in the write Nde reproducing unit sucks outside air again A dehumidifier and a circulation fan are provided to be discharged to the outside. The circulation fan sucks dry air dehumidified from the dehumidifier and air from the room, mixes it, and ventilates the outside air for inspection and maintenance. A ventilation conduit is provided via a switching valve between the inlet side of the dehumidifier and the circulation fan suction side so that the air can be sucked in for the purpose, and external air is sent to the suction side of the circulation fan by opening and closing the switching valve The purpose is to provide a rust prevention and dehumidification device in a steel unit box such as a large-scale bridge used in airports.

  The present invention provides a dehumidifier and a blower in a rust and dehumidifier that prevents rust by preventing moisture in the room, and the blower blows dry air and air from the room from the dehumidifier, Provided is a rust prevention and dehumidification apparatus provided with a ventilation pipe between an inlet side of a dehumidifier and a circulation fan inlet so that the air-fuel mixture can be sent to a room and outside air can be sucked for ventilation.

In a rust and dehumidification apparatus or system that prevents rust by preventing indoor moisture, in order to prevent distortion and breakage due to the pressure difference between the indoor pressure and the external pressure, the indoor air inlet of the dehumidifier and the dehumidifier A pressure balancing system is provided on the inlet side of the dehumidifier, and the system is provided with a valve that opens and closes by sensing by a sensor provided on the suction side, and the inlet side of the dehumidifier so that the outside air can be inhaled for ventilation And the ventilation circuit provided before the circulation fan inlet to inhale outside air for ventilation, and configured to operate the pressure balance system when the indoor pressure rises due to outside air intake. An anti-rust / dehumidification device or anti-rust / dehumidification system is provided.

In the rust preventive dehumidifier that takes moisture inside a large scale inside a steel unit box such as a bridge used for an airport, etc., the running cost could not be neglected. On the other hand, it is possible to lower the temperature difference between the inside and outside of the unit box so that no stress is applied to the temperature difference between the inside and outside of the unit box. ) And can contribute to the environmental conservation of workers.

FIG. 1 shows a room-like unit section 7 which is an embodiment of the present invention and is a unit that hangs on a jetty that forms part of an airport. A plurality of unit sections 7 are combined to form a pier.
A plate (not shown) is provided above the plurality of unit sections 7 to form a part of the runway. The lower part is sealed with a bridge girder (not shown).
The unit compartment is preferably sealed as much as possible from the viewpoint of preventing moisture from entering, but an entrance / exit 70 that also serves as an inspection for inspection is provided as appropriate, and the entrance / exit also serves as a vent for air for drying. That is, as an embodiment in the present invention, the unit section 7 is like a cell to be combined, and this combination forms a jetty.

In FIG. 2, a plurality of unit sections 7 are combined and sequentially assembled.
FIG. 3 shows a situation where the lower bridge girder is integrated with the upper section. The bridge girder is intended to be placed on the sea floor. A plurality of such combinations are assembled, bridged, attached to a barge, carried, and fixed at a designated position on the seabed.

  As FIG. 4 shows, it is a conceptual diagram of the rust prevention dehumidification apparatus 1 and system which sends the dry air by which the dehumidifier 2 is arrange | positioned indoors, and contains a pressure balance apparatus, Comprising: Before the dehumidifier 2, Desalted filter 20 is provided, and air containing salt is sucked from the outside (in this case, the sea surface side) through suction port 101, conduit 102, and desalted filter 20 to the regeneration unit side of dehumidifier 2. Remove the salt. Of course, this desalting filter is not necessary unless it is offshore.

The air sucked from the suction port 101 is sucked into the regeneration unit 23 side of the dehumidifier 2 through the salt removal filter 20, and after finishing the role of removing moisture from the room air, the pipe 103 is again connected. Then, it is discharged to the outside through the discharge port 104. In that case, the air has high humidity and high temperature (see FIGS. 5 and 6).

On the other hand, air with humidity in the room is sucked into the dehumidifying side of the portion to be dried 24 of the dehumidifier 2 from the indoor suction port 4, dried, passes through the pipeline 210, passes through the booster circulation fan 3, and enters the room. Humidity is removed and returned to dry air.
Further, as shown in FIG. 4, in order to introduce the outside air, another pipe line 301 that connects the pipe line 210 that goes from the inlet of the dehumidifier 2 to the booster circulation fan 3 is provided. An opening / closing valve 300 is provided in the pipeline 301.
As a result, the open air can be sucked from the suction port 101 by opening and closing the valve 300 by an appropriate means. This ventilation pipe guarantees the environmental protection of the worker and keeps safety.
On the other hand, if the conduit 301 is connected to the conduits 402 and 501 that connect the valve A, a balanced pressure adjustment is possible as will be described later.

In such a state, the room air becomes dry air by the dehumidifier 2 and is sent into each room, thereby preventing corrosion.
The structure of the dehumidifier 2 is a commercially available structure, which is divided into a regenerator 23 and a part 24 to be dried. The air in the regenerator 23 has been dehumidified in advance by a heater, and rotates in a corrugated cardboard shape. It is sent to the cylindrical type. On the other hand, the room air to be dried from the other side rotates and comes into contact with the portion dehumidified by the cardboard-shaped cylindrical portion 24 to be dried.

In normal times, the indoor air is supplied from the indoor suction port 4, and the sucked humid air enters the portion to be dried 24 of the dehumidifier 2 and is dried, and then passes through the pipeline 210 and is separated from the booster circulation fan 3 to the unit partition. Will be sent to each unit compartment. If the suction port 6 is provided on the booster circulation fan 3 side for circulation, the load on the fan 3 is reduced. Centrifugal blowers can be used because both suctions are possible.
Therefore, although the total air volume sent to the whole in the case of both suctions is reduced, the total amount of dry air is reduced, but there is an advantage that the load can be reduced if the blower is continuously rotated.
In other words, when air is blown by single suction, the load increases when sending to the pipeline, and it is inevitable that the horsepower will be increased. However, if the indoor air is sucked from one side in this way, the load can be reduced. As a result, the horsepower of the blower can be reduced.

Next, the following operation is performed for a phenomenon in which the indoor air pressure is increased or decreased due to a temperature difference between the sun and the shade, or when the external pressure is lowered due to a typhoon or the like. That is, a pressure balancing system 5 including a valve A is provided.

That is, when the pressure inside the room becomes high, the sensor 201 senses it, and if the dehumidifier 2 is in operation, the valve A is opened, and indoor air enters from the indoor suction port 4. In FIG. 4, it passes through the pipes 402 and 501 surrounding the valve A, passes through the regeneration unit 23 of the dehumidifier 2, and is discharged from the pipe 103 to the outside through the discharge port 104. The pipe line 501 is connected to the pipe line on the outlet side of the salt removal filter 20 because the indoor air has already been salted.
The sensor 201 can be provided at an appropriate place in the room, but is preferably attached to a double wall surface surrounding the suction port 101. It is a double pipe so as to surround the pipe line 102 and detects the pressure inside and outside the room. And, if it is attached to the bridge girder, it becomes separate from the unit compartment 7 and it becomes difficult to attach, so if it is attached to the compartment, it can move together and can be provided in advance.

  On the other hand, when the indoor pressure falls below the outside air pressure, the valve A opens, and the outside air is sucked from the outside through the suction port 101 through the salt filter 20, the pipe 501, the valve A, the pipe 402, and the backflow indoor suction port. Guide from 4 to the room and equilibrate.

In this case, when the dehumidifier is not rotating, when the pressure in the room becomes high, the valve A is opened, sucked in from the indoor suction port 4, and discharged from the suction port 101 through the pipelines 402 and 501. . That is, the air directed to the pipe 510 is discharged from the discharge port 104 through the pipe 103 through the inside of the regeneration unit 23.
In addition, as shown in detail in FIG. 4B, the room air is connected from the inlet 4 to the regeneration direct pipe 103 and is not passed through the regenerator 23 by a switching valve (310) provided in the pipe 103. It is also possible to open it to the atmosphere. In this case, there is a point that if the regeneration unit 23 passes the dried room air, the regeneration unit 23 cannot use the room air, but there is no time delay due to the small pipe resistance and the dehumidifier is not operating. There is an advantage that can be discharged.

If the indoor pressure falls below the external pressure under the same conditions, the indoor suction port 4 valve A is opened, and outside air is sucked from the outside through the salt removal filter 20 through the suction port 101, the pipe line 501, the valve A, and the pipe line 402. Then, it is led from the indoor suction port 4 into the room and balanced.
Further, since ventilation is required when working inside, the on-off valve 300 is opened to form a circuit connected to the outside, and air is introduced from the suction port 101. In this case, the circulation fan 3 is moving, and the external air that has entered through the suction port 101 passes through the salt filter 20 for preventing salt damage to the conduit 301 and enters the circulation fan 3 for ventilation.
In this case, when the indoor pressure is higher than the outside air, the valve A is opened, and as described above, the sensor 201 senses it, sucks air from the indoor suction port 4, passes through the conduits 402 and 501, passes through the regeneration unit 23. And discharged from the discharge port 104 to the outside. In other words, it can be used as it is when the equilibrium system is ventilation.

Also, as shown in the enlarged view of part A in FIG. 4, when the indoor pressure higher than the outside air passes through the pipes 402 and 501 from the suction port 4 and returns to the suction side of the dehumidifier 2, a reverse flow is caused to the pipe 102 side. A counter-support valve 110 is provided because it must be prevented. As a result, the air sucked from outside air goes to the circulation fan 3 through the pipe line 301.
On the other hand, the indoor air is discharged from the high-pressure inlet 4 through a conduit 104 that leads to the outside air through a circuit including the regeneration unit 23 of the dehumidifier 2.

As described above, the system path of the dehumidifier can be used as it is without separately installing other equipment, and the internal / external pressure can be adjusted, which can contribute to cost reduction.
In particular, the circulation fan 3 can also be used for the circulation of indoor air and the ventilation line by one unit.

As described above, in the present invention, dehumidified air is sent to each section to prevent corrosion, and it is possible to prevent stress from being applied due to a temperature difference between the inside and outside of the section, leading to distortion and breakage. Of course, the present invention is not limited to the structure of the pier, but can be applied to structures that are corroded by humidity.

  As described above, in the above example, the application example at the airport pier has been described. However, in the field where rust prevention is required or the structure where the internal / external pressure needs to be adjusted, it is limited to that described in this example. Without departing from the technical idea of the present invention, various modifications and applications can be made by those skilled in the art.

It is explanatory drawing which showed the unit division which is one Example of this invention. It is explanatory drawing which couple | bonded several unit division which is one Example of this invention. It is explanatory drawing which couple | bonded the several unit division which is one Example of this invention with the lower bridge girder. It is explanatory drawing by the conceptual diagram which included the apparatus and the pressure balance apparatus which send dry air in the several unit division which is one Example of this invention, and was equipped with the conduit for ventilation. 1 schematically shows a side view of an apparatus for sending dry air to a plurality of unit compartments according to an embodiment of the present invention. The outline of the front view of the device which sends dry air to a plurality of unit divisions which are one example of the present invention is shown.

Explanation of symbols

1 Rust prevention dehumidifier 2 Dehumidifier 3 Booster circulation fan 3
4 Indoor air inlet 5 Pressure balance system

Claims (3)

In the rust prevention dehumidifier which prevents rust in the steel unit box by preventing indoor humidity, a dehumidifier and a circulation fan are provided, and this circulation fan sucks dehumidified indoor air into the dehumidifier. After returning to the room as dry air,
After sucking outdoor air outside and absorbing the moisture of the indoor air in the regeneration unit of the dehumidifier, this outdoor air is discharged to the outside,
Further, the circulation fan sucks indoor air from an indoor suction port, mixes the sucked air and the dry air of the dehumidifier, and blows the air into the room.
As further can be sucked outside air for inspection and maintenance for ventilation, ventilation duct via a switching valve between the suction side of the outdoor air suction side and the circulation fan of the dehumidifier is provided, the said switching valve Rust prevention and dehumidification equipment in steel unit boxes such as large bridges used in airports, etc., characterized by sending outside air to the suction side of the circulation fan by opening and closing In the rust prevention and dehumidification device, in order to prevent distortion and breakage due to the pressure difference between the room pressure and the outside pressure, a pressure balance connected by a pipe having a valve between the room air suction side and the outside air suction side of the dehumidifier A large-scale bridge used in an airport, etc., which is configured to open the valve and operate the pressure balancing system when the pressure in the room increases due to the intake of outside air. The rust preventive dehumidifier according to claim 1 in a steel unit box. In the rust prevention and dehumidification device, the valve of the pressure balance system provided to prevent distortion and breakage due to the pressure difference between the indoor pressure and the external pressure is opened and closed by a sensor provided on the outside air suction side. rust dehumidifier of 請 Motomeko 2 wherein the steel units Hakonai such large beams utilized, such as the airport, characterized in that

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