JPH0310476Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is installed in the flow path of compressed air to remove moisture from the compressed air, for example in painting or automatic equipment where compressed air is used. Related to dehydration and humidification equipment.

(Prior Art) Compressed air is currently used in an extremely wide variety of industrial applications. However, the air that becomes high temperature during compression contains moisture, and as the temperature of the compressed air decreases, this moisture becomes supersaturated and generates mist-like droplets. When working, water droplets are generated in the compressed air flow path, which can cause problems, so when using compressed air, it is necessary to remove water and dehumidify the compressed air.

Conventionally, there have been three types of devices for removing water and dehumidifying compressed air:

(1) A method in which the compressed air flow path is formed in a meandering or spiral shape, and moisture is removed by passing it through the cooler.

(2) A type that uses a hygroscopic filter with a hygroscopic agent such as silica gel sealed inside, and compressed air is passed through the filter to adsorb and remove moisture.

(3) A type in which pressurized air is applied to a centrifugal separator and water is removed by the action of the centrifugal separator.

(Problems to be solved by the invention) However, each of the three conventional devices had the following drawbacks.

First, with method (1), the equipment itself is complicated and the running cost is high; with method (2), water can be removed if the moisture absorbent in the filter absorbs water until it reaches a saturated state.・Since the dehumidification effect is lost, the filter must be replaced frequently. Furthermore, the compressed air supplied from compressed air supply devices such as compressors may contain a lot of oil and dust. Since the mesh size of the filter is usually about 0.1 to 30 μm, it is easily clogged, which also makes it necessary to replace the filter.

In addition, with method (3), it is not possible to dehumidify compressed air, and there is also a risk that the strong centrifugal force will make water droplets finer and mix them into the compressed air.・The dehumidification effect was not sufficient.

This idea solves the problems mentioned above.
It is an object of the present invention to provide a compressed air dehydration/humidification device that can effectively remove water and dehumidify compressed air with a simple structure and can significantly reduce the frequency of replacing parts.

(Means for Solving the Problems) The compressed air dehydration/humidification device according to this invention is a device that is disposed in a flow path of compressed air to remove water and dehumidify the compressed air. , an inflow channel that allows compressed air to flow downward; a reversal channel that communicates with the inflow channel and reverses the flow of the compressed air from downward to upward; and an outflow channel that communicates with the reversal channel and causes the compressed air to flow out. In the inlet flow path, a throttle nozzle that throttles and expands the compressed air is installed at the top, and below the throttle nozzle, the moisture contained in the compressed air is deposited when the compressed air passes through, and the attached water droplets are compressed. The above-mentioned problems are solved by providing a porous body that can be discharged downward together with air, and by forming an opening at the bottom of the reversing channel that communicates with a drain tank connected at the bottom. Note that the porous body here is, for example, formed by filling glass beads with a diameter of 2 to 10 mm, or formed by gathering thin metal wires such as a metal scrubber,
It uses a porous material such as Celmet (trade name), which has many holes with a diameter of about 0.5 to 5 mm, and is made of a hydrophilic material and has a high porosity.

(Operations and effects of the invention) In the compressed air dehydration/humidification device according to this invention, first, when the compressed air passes through the inflow channel, it is expanded by the throttle nozzle and the temperature of the compressed air decreases. The moisture contained in the compressed air becomes supersaturated and turns into fine droplets like mist, which then passes through the porous body, causing fine droplets to form on the peripheral wall of the flow path inside the porous body. This results in the attachment of water droplets grown from the liquid. Then, the attached water droplets are discharged from the lower part of the porous body along with the compressed air by gravity and the wind pressure of the compressed air while adhering to oil, dust, etc. mixed in the compressed air.

After that, the compressed air and water droplets pass through a reversal channel, but in the reversal channel, the compressed air suddenly reverses from downward to upward, and centrifugal force is also applied, causing the compressed air and water droplets to separate. The water droplets can accumulate at the bottom of the reversing channel and can be discharged from the drain tank via the opening, while the dehydrated and moistened compressed air can flow out via the outflow channel.

Therefore, in the compressed air dehydration/humidification device according to this invention, an inflow channel, a reversal channel, and an outflow channel are formed, a throttle nozzle and a porous body are arranged in the inflow channel, and a porous body is provided in the inversion channel. Water and dehumidification of compressed air can be effectively performed with a simple structure that only requires an opening in the lower part to communicate with the drain tank. In addition, porous bodies do not have a moisture absorbent sealed in them like conventional hygroscopic filters, and they also have a higher porosity than filters and are placed vertically in the compressed air flow path, making them heavier than their own weight. Water droplets adsorbing oil and dust can be easily discharged downward by the wind pressure of compressed air.
There is no need to replace the porous body even after long-term use.

(Example) Hereinafter, an example of this invention will be described based on the drawings.

The dehydration/humidification device 1 of the first embodiment shown in FIG. 1 is disposed in a compressed air supply flow path pipe P near the place where the compressed air is used. It is connected to the flow path pipe P.

The head 5 includes an inlet hole 5a that communicates from the side surface to the center of the plane, and an outlet hole 5b that communicates between an annular groove 5c formed on the periphery of the lower surface of the inlet hole 5a and the side surface on the opposite side of the inlet hole 5a. The inlet hole 5a and the outlet hole 5b are respectively connected to the supply flow path pipe P at a side surface of the head 5.

A substantially cylindrical inner tube 6 is connected downward to the lower surface side of the head 5 of the inlet hole 5a, and a cylindrical outer tube 13 is connected concentrically with the inner tube 6 to the periphery of the groove 5c.

At the lower part of the outer cylinder 13, there is a bottom plate 1 that closes the lower part of the outer cylinder 13.
A lower tip 6a of the inner cylinder 6 is inserted into the bottom plate 10, and is connected to a connecting pipe 12 in which a drain tank 11 is provided at the lower part.

A communication hole 6b having a large number of small holes 6c is provided at the tip 6a of the inner cylinder 6, and the communication hole 6b is connected to the connecting pipe 12.

Further, the inner cylinder 6 has a bottom portion 6d formed by closing the upper portion of the communication hole 6b at the tip portion 6a.
A large number of small holes 6e are formed in the upper wall d, and conical fins 9 that widen downward are fixed to the outer peripheral surface of the inner cylinder 6 where the small holes 6e are formed.

Therefore, in the device 1 of the first embodiment, the inner cylinder 6
An inflow passage 2 is formed through which the compressed air from the head inlet hole 5a flows downward, and the outer peripheral surface of the lower part of the inner cylinder 6, the fins 9, and the bottom plate 10 direct the flow of compressed air from downward to upward. A reversing flow path 3 is formed to reverse the flow, and the outer peripheral surface of the inner cylinder 6 and the inner peripheral surface of the outer cylinder 13 form an outflow flow path 4 through which the compressed air flows out from the head outlet hole 5b.

In the upper part of the inner cylinder 6 in the inflow channel 2,
A throttle nozzle 7 is provided to throttle and expand the compressed air from the head inlet hole 5a, and a porous body 8 is provided below the throttle nozzle 7.

The porous body 8 is a porous body made of a hydrophilic material with a high porosity, and may be formed by filling it with glass beads having a diameter of 2 to 10 mm, or by filling it with a thin metal wire such as a metal scrubber. They may be formed in clusters, or they may be formed using porous cellmet, etc., in which many holes with a diameter of about 0.5 to 5 mm are bored.

Regarding the usage of the device 1 of the first embodiment, the compressed air entering the inflow channel 2 from the head inlet hole 5a is expanded by the throttle nozzle 7, and in order to lower its temperature, the compressed air is The water that was in the porous body 8 becomes supersaturated and generates fine droplets like mist, which then passes through the porous body 8, causing fine droplets to form on the peripheral wall of the flow path in the porous body 8. This results in the attachment of water droplets grown from droplets.

The attached water droplets adsorb oil, dust, etc. mixed in the compressed air, and are moved along with the compressed air to the porous body by gravity and the wind pressure of the compressed air.
It is discharged from the lower part and is discharged to the outside of the inner cylinder 6 through the small hole 6e.

Thereafter, the compressed air and water droplets head downward along the fins 9 in the reversing flow path 3, but the compressed air is suddenly reversed by the bottom surface and inner circumferential surface of the bottom plate 10 and heads upward. The compressed air and water droplets are separated by the application of force, and the water droplets accumulate at the bottom of the bottom plate 10, and the clean compressed air, which has been dehydrated and moistened and from which oil, dust, etc. have been removed, flows from the outflow passage 4 to the head outlet hole 5.
It flows out to the supply flow path pipe P via b.

The water accumulated at the bottom of the bottom plate 10 passes through the small hole 6c, which is the opening at the bottom of the reversing channel 3, passes through the communication hole 6b and the connecting pipe 12, and is drained out of the device 1 by operating the drain kettle 11. It can be discharged.

Therefore, the device 1 of the first embodiment has a simple structure, can efficiently remove water and dehumidification from compressed air, and can also remove oil, dust, etc., with little trouble, and the device 1 itself can be made compact. Therefore, it can be installed at any location in the compressed air supply flow path, and has great utility value. Moreover, since the porous body 8 does not use a moisture absorbent and is not clogged, there is no need to replace it even if it is used for a long period of time.

Note that in consideration of the fact that water droplets adhering to the lower end of the fins 9 in the reversing flow path 3 rise through the outflow flow path 4 together with the dehydrated and moistened compressed air, the device 21 of the second embodiment shown in FIG. As shown in FIG.
It may also prevent water droplets from entering the interior.

In the devices 1 and 21 of the first and second embodiments, if the flow rate of compressed air differs depending on the place of use, the inner diameter of the throttle nozzle 7, the opening surface area of the porous body 8 (or the inner diameter of the inner cylinder 6 ) can be dealt with accordingly. For example, the diameter of the throttle nozzle 7 is increased when a higher flow rate is desired, and the diameter of the porous body 8 is also increased as the flow rate increases. Furthermore, the aperture nozzle 7
When the pressure difference before and after the nozzle 7 is large, a tapered and divergent shape is desirable, and when the pressure difference is small, a tapered shape is desirable.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing how a dehydrating/humidifying device according to the first embodiment of this invention is used, and FIG. 2 is a sectional view showing how the dehydrating/humidifying device according to the second embodiment is used. 1, 21... Dehydration humidification device, 2... Inflow channel, 3
... Reversing channel, 4... Outflow channel, 6e... (opening) small hole, 7... Throttle nozzle, 8... Porous body, 1
1...Drenkotsuk.

Claims (1)

[Scope of utility model registration request] Installed in the compressed air flow path to remove water from compressed air.
An apparatus for dehumidifying, the apparatus comprising: an inflow passage through which the compressed air flows downward; and an inversion passage communicating with the inflow passage and through which the compressed air reverses its flow from downward to upward; An outflow channel is formed that communicates with the reversal channel and causes the compressed air to flow out, and the inflow channel is provided with a throttle nozzle in the upper part that throttles and expands the compressed air, and a throttle nozzle is provided below the throttle nozzle. A porous body is provided that can attach moisture contained in the compressed air when the compressed air passes through and discharge the attached water droplets downward together with the compressed air, and is connected to the bottom of the reversing flow path at a lower part. A compressed air dehydration/humidification device characterized in that an opening communicating with a drain tank is formed.