JP2003093834A - Protective filter for air control machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently suppress the generation of waterdrops by a check valve for restricting the movement of air around a precise air control machinery and an adsorbing material for absorbing steam when a temperature lowers to suppress the generation of waterdrops to reduce the operation failure of the air precise control machinery because waterdrops are generated by the lowering of the temperature of piping to adhere to the valve, or the like, of the precise air control machinery for controlling the movement of compressed air in the piping and rust is generated when waterdrops adhere to the valve, or the like, to be allowed to stand to lower the slidability of the valve to generate operation failure. SOLUTION: The protective filter 1 of the air control machinery equipped with the check valve 6 for restricting Brownian movement of air and the adsorbing material 5 is attached to the precis air control machinery in front of the piping thereof when pressure difference is lost in the piping of compressed air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for protecting gas control equipment such as a solenoid valve for controlling the movement of gas from water droplets.

[0002]

2. Description of the Related Art As a method for producing compressed air, the temperature is higher than room temperature because it is produced by compressing gas with a compressor or the like. Therefore, the solenoid valve and the like that control the movement of gas are also warmed by the compressed air. When the use of the device ends and the movement of compressed air ends, the temperature of the gas drops to room temperature. At this time, as the temperature of the water vapor in the gas decreases, the water vapor in excess of the saturated water vapor amount turns into water droplets. This water droplet adheres to a gas control device such as a solenoid valve. In particular, water droplets attached to the valve of the solenoid valve rust the valve.

On the other hand, in recent years, in order to protect the solenoid valve, an air dryer using a semipermeable membrane has been used. This air dryer always uses a part of the gas coming from the piping for purging to dry the gas.

[0004]

SUMMARY OF THE INVENTION In the present invention, when the use of compressed gas is completed after the use of the apparatus, the compressor is stopped and the warmed gas is cooled, and the water vapor having more than the saturated water vapor amount is changed into water droplets. This water drop adheres to the operating part such as the valve of the gas control device, and there is a problem in that the valve or the like is rusted or causes malfunction due to adhesion of water.

On the other hand, when an air dryer using a semipermeable membrane is used, since a part of the compressed air is always used for purging, there is a problem that gas is always consumed and running cost becomes high. In addition, since the cooling dryer and adsorption dryer dehumidify all the air supplied, dehumidification to such an extent that water droplets do not occur even if the temperature drops causes a large amount of electricity consumption and a high running cost. There is.

[0006]

To this end, the gas control device protection filter is provided with an adsorbent and a member for restricting the movement of gas molecules due to Brownian motion from the gas control device protection filter to the external pipe. The adsorbent is installed between the member that restricts the movement of gas molecules by Brownian motion and the gas control device.

Examples of the adsorbent include silica adsorbents, metal oxides, zeolite adsorbents, activated carbon, and combinations thereof.

The member for restricting the movement of gas molecules due to the Brownian motion is made of a porous material made of a metal, an organic material, or an inorganic material, and may have a plate shape, a cylindrical shape, or a cup shape. It is located between the member that restricts the movement of gas molecules due to Brownian motion and the gas control device.

As a member for restricting the movement of gas molecules due to Brownian motion, a rubber-like substance having a notch at the back end and a material capable of opening and closing a plastic plate by a spring or the like can be used. The shape and material are not limited as long as it is a member that restricts movement due to Brownian motion.

[0010]

In the present invention, the temperature characteristic of the adsorbent is used, and the adsorbent is used by paying attention to the fact that the adsorbed amount of water vapor increases as the temperature decreases. That is, gas having a relatively high temperature comes during use of the device, but when the use of the device ends, the movement of the gas ceases, so that the air in the pipe has the same temperature as the outside air temperature. When the gas control equipment protection filter of the present invention is used, the air in the pipe decreases the saturated water vapor amount as the temperature decreases, but the adsorbent adsorbs the water vapor in the gas by increasing the water adsorption amount due to the lower gas temperature. The generation of water drops can be suppressed.

By using a member that restricts the movement of gas molecules due to Brownian motion, it becomes difficult for water vapor molecules in a gas control device such as an electromagnetic valve to move to the entire pipe due to the member that restricts movement of gas molecules due to Brownian motion. Water vapor molecules in a gas control device such as a solenoid valve can be efficiently adsorbed by an adsorbent.

By installing the adsorbent in a closed space rather than in the passage through which the gas moves, the adsorbent is less likely to come into contact with oil droplets generated from the compressor or the like. Since the contact of oil drops is small, the life of the adsorbent can be extended.

[0013]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, etc. of the components described in this embodiment are merely examples for explanation, not to limit the scope of the present invention thereto.

FIG. 1 is a first embodiment of a gas control equipment protection filter 1 according to the present invention. In FIG. 1, an adsorbent 5 that adsorbs moisture, a porous body 4 that fixes the adsorbent 5 and a check valve 6 that is a rubber member having a notch at the tip are provided as a member that restricts the movement of gas. However, at both ends of the housing, an inlet 11 for compressed air and an outlet 12 connected to the gas control device 22 are provided. Here, the inlet 11 is connected to the compressed air pipe 21 and the outlet 12 is connected to the gas control device 22. The compressed air enters through the compressed air pipe 21 from the inlet 11 of the gas control device protection filter 1 and flows through the check valve 6, the adsorbent 5 and the outlet 12 in the order of the gas control device 22. At this time, when compressed air is not consumed in the gas control device 22 and after, and when there is no pressure difference inside the pipe due to atmospheric pressure inside the pipe, air such as oxygen molecules, nitrogen molecules, water vapor molecules, etc. Therefore, the check valve 6 cannot move freely in front of and behind the check valve 6. Here, the device is used to continuously operate the compressor for 10 hours, and the compressed air is continuously sent to the gas control device protection filter 1 and the gas control device 22. After 10 hours, the temperature of the compressed air in the pipe is about 40 ° C.
At this time, the pressure of the compressed air was 0.2 MPa. Then, the compressor is stopped to finish sending the compressed air. At the end of the operation, the relative humidity inside the compressor, the piping, the gas control device protection filter 1 and the gas control device 22 was 32%. After 5 hours, the temperature inside the compressor, the piping, the gas control device protection filter 1, and the gas control device 22 decreased to 15 ° C., which is the same as the outside air temperature, and became atmospheric pressure. Here, the relative humidity of the compressor and piping is 1
It is 00%, and water droplets are generated in the pipe. The humidity inside the gas control device protection filter 1 and the gas control device 22 is 60% because the adsorbent 5 adsorbs water vapor as the temperature decreases.
And no water droplets were formed. No water droplets adhered to the valve in the gas control device 22.

FIG. 2 shows a second embodiment of the gas control equipment protection filter 1 according to the present invention. In the figure, the housing 2 has an adsorbent 5 for adsorbing moisture and a check valve 6 made of a rubber member as a member for restricting the movement of gas, and both ends of the housing 2 are provided with a compressed air inlet 11 and a gas control device 22. A connecting outlet 12 is provided. The adsorbent 5 is installed in the closed space 35, not in the passage through which the gas moves. The compressed air is supplied from the inlet 11 to the gas control device filter 1
The gas control device 22 enters through the check valve 6, the check valve 6, the vent hole 15, and the outlet 12. At this time, since the adsorbent 5 in the closed space 35 is not in the path through which the compressed air moves, it is difficult for the adsorbent 5 to come into contact with the oil from the compressor. Further, when compressed air is not consumed in the gas control device 22 or later and when the inside of the pipe has the same pressure, the air such as oxygen molecules, nitrogen molecules, water vapor molecules, etc. is checked by the check valve 6 before the check valve 6. You cannot move freely behind you. Here, the apparatus is operated and the compressor is continuously operated for 10 hours to continuously send compressed air to the gas control device protection filter 1 and the gas control device 22. The temperature of compressed air after 10 hours is about 4
It has reached 0 ° C. At this time, the pressure of compressed air is 0.2M
It was operated at Pa. Then, the compressor is stopped to finish sending the compressed air. At the end of the operation, the relative humidity inside the compressor, the piping, the gas control device protection filter 1 and the gas control device 22 was 32%. After 5 hours, the temperature inside the compressor, piping, gas control equipment protection filter 1 and gas control equipment 22 is the same as the outside air temperature.
The temperature dropped to ℃ and became atmospheric pressure. Here, the relative humidity of the compressor and the pipe is 100%, and water droplets are generated in the pipe. The humidity inside the gas control device protection filter 1 and the gas control device 22 was 61% because the adsorbent 5 adsorbed water vapor as the temperature decreased, and no water droplets were formed. At this time, since the adsorbent 5 is not in the passage through which the gas moves, it hardly comes into contact with the oil content of the compressor. Since the adsorbent 5 does not come into contact with oil, the adsorbent 5 has less influence on the oil and the adsorbent 5
The longevity of the product was maintained.

[0016]

Since the present invention is constructed as described above, it has the following effects.

Since the check valve 6 makes it difficult for gas molecules such as water vapor molecules in the gas control device 22 and the entire pipe to move, the water vapor in the gas control device 22 is efficiently adsorbed by the adsorbent 5. Even if the temperature of the water vapor in the gas control device 22 drops, the water vapor is less likely to be adsorbed by the adsorbent 5 to generate water droplets, and the gas control device can reduce troubles of the gas control device due to rust or water drops. .
In addition, the running cost is cheaper than other dehumidification methods because it does not consume air like a semi-permeable membrane air dryer and does not dehumidify the gas in the entire piping and does not use electricity. You can dehumidify with.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a gas control device protection filter.

FIG. 2 is a cross-sectional view of a gas control device protection filter in which an adsorbent 5 is installed in a closed circuit, not in a gas moving passage.

[Explanation of symbols]

1 Gas control equipment protection filter 2 housing 4 Porous body 5 Adsorbent 6 Check valve 11 entrance 12 exit 15 vents 21 Compressed air piping 22 Gas control equipment 30 Flow of gas transfer (→) 35 closed space

Claims (4)

[Claims] 1. A filter housing having an adsorbent that adsorbs moisture and a member that restricts the movement of gas molecules due to Brownian motion, and the adsorbent is installed at a member that restricts the movement of gas molecules due to Brownian motion. And a gas control device protection filter, which is located between the gas control device and the gas control device. 2. The adsorbent is installed at a position where the adsorbent is introduced into the gas control device through a member that restricts Brownian motion of gas molecules, but the adsorbent is a member that restricts movement of Brownian motion of gas molecules. The gas control device protection filter according to claim 1, wherein the filter is located between the gas control device and the gas control device and is installed in a closed space. 3. The gas control device protection filter according to claim 1, wherein a porous body capable of filtering solid matter is used as a member for limiting the movement of the gas molecules due to Brownian motion. 4. The gas control device protection filter according to claim 1, wherein a cap having an incision at a tip made of an elastic body is used as the member for restricting the movement of the gas molecules due to the Brownian motion.