JP2010149043A - Cyclonic separating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that, although the principle of separation utilizing a cyclone has been known, the conventional separating apparatuses utilizing the principle have been insufficient in centrifugal force and not been capable of applying to what requires a separation and removal effect with a high accuracy, such as air supplied to a paint gun. <P>SOLUTION: The apparatus includes: a cyclone cylinder 3; a discharge cylinder 33; a spiral plate 23 arranged to partition a space with an annular cross section between the cyclone cylinder 3 and the discharge cylinder 33 above and below, and giving a turning ability to a compressed gas flowing in the cyclone cylinder 3 from above and sending the gas to a lower cyclone chamber 35; and a pressure chamber 31 provided on the spiral plate 23. According to the separating apparatus 1, the centrifugal force acting on moisture or the like in the rotational flow can be increased 300-2,000 times its own weight in the normal gravity field to obtain a sufficient centrifugal separation effect with a simple constitution and manufacture. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cyclonic separation device suitable for separating substances and microorganisms contained therein from compressed gas.

For example, in the case of air supplied to a paint gun, it is necessary to separate and remove moisture in advance. In such a case, conventionally, moisture is trapped by a filter or evaporated with an air dryer. Was.
Thus, when a filter is used, the filter is clogged and must be replaced frequently, which is troublesome. If an air dryer is used, the cost will be borne.

By the way, the principle of centrifugal separation using a cyclone has been known for a long time, and as described in Patent Document 1, a separation device using the principle has been developed.
However, none of the conventional separation devices can be applied to a device that requires a separation and removal effect with high accuracy, such as air supplied to a coating gun, because the centrifugal force applied to the substance to be separated and removed is insufficient. It was.

JP 2004-305907 A

  In order to solve the above-mentioned problems, the present invention uses the principle of centrifugal separation using a cyclone and devise the structure to significantly increase the centrifugal force acting on the substance to be separated and removed from the conventional product. An object of the present invention is to provide a separation apparatus capable of achieving this.

  The present invention has been made to solve the above-mentioned problems, and the invention of claim 1 is a cyclonic separation device for separating substances and microorganisms contained therein from compressed gas, comprising a cyclone cylinder, A discharge cylinder that is coaxially inserted into the cyclone cylinder, and a sectional annular space between the cyclone cylinder and the discharge cylinder are vertically partitioned, and swirls into the compressed gas that has flowed into the cyclone cylinder from above. A cyclonic separation device comprising a spiral plate that applies force and feeds downward, and a pressure chamber provided on the spiral plate.

  According to a second aspect of the present invention, in the cyclonic separator according to the first aspect, a communication hole is formed in the lower portion of the side wall of the discharge tube, and a spiral plate having an open center is disposed in the lower portion of the cyclone tube. The cyclone separator is characterized in that it is partitioned at the top and bottom, and the lower end opening of the discharge cylinder is closed by the spiral plate.

  According to a third aspect of the present invention, in the cyclonic separator according to the first or second aspect, the upper end of the cyclone cylinder is closed with a lid portion, and the lid portion opens in a concave shape downward, A pair of openings formed opposite to the side wall of the lid body, and a discharge path formed in a recess of the lid body, with one end communicating with one of the openings and the other end communicating with the upper end opening of the discharge cylinder. The cyclone separator is characterized in that one of the openings is a discharge port and the other is an inflow port.

  According to the cyclonic separation device of the present invention, the centrifugal force applied to the substance and the like to be separated and removed from the conventional product can be remarkably increased. Therefore, it can also be used for those that require a separation and removal effect with high accuracy, such as air supplied to a coating gun.

A cyclonic separator 1 according to a first embodiment of the present invention will be described with reference to FIGS. The separation device 1 is assumed to be disposed in the air supply path of the coating gun.
Reference numeral 3 denotes a cyclone cylinder. The cyclone cylinder 3 has a circular cross section and the same diameter. The cyclone cylinder 3 is open at the top and bottom, and an internal thread is formed on the inner wall surface on each opening side.

Reference numeral 5 denotes a lid portion, and a lid body 7 of the lid portion 5 includes a circular ceiling portion and a side wall, and is opened in a concave shape downward. An arcuate bulged portion 9 whose section bulges in a semicircular arc shape extends upward from the upper surface along the diameter direction on the ceiling of the lid body 7. An annular projection 11 extends downward from the lower end on the inner side of the side wall of the lid body 7, and a male screw is formed on the outer peripheral surface of the annular projection 11. Circular openings 13 and 15 are formed on both side walls of the lid main body 7 on the side of the arcuate bulge 9 so as to face each other, and the space inside the lid main body 7 is outward through the openings 13 and 15. It is open towards Female threads are formed at the mouth edges that define the openings 13 and 15. The opening 13 serves as an inlet for compressed air, and the opening 15 serves as an outlet for compressed air. These are hereinafter referred to as an inlet 13 and an outlet 15.
The separation device 1 is interposed in the middle of a compressed air supply path (not shown), and the inlet 13 and the outlet 15 are respectively screwed into the upstream and downstream ends of the compressed air supply path. Connected.

  Reference numeral 17 denotes an arc-shaped receiving portion whose cross section is recessed in a semicircular shape downward, and this arc-shaped receiving portion 17 is provided on the lower surface side of the ceiling portion of the lid body 7. The arcuate receiving portion 17 extends inward from the discharge port 15. The arcuate receiving portion 17 is vertically opposed to the arcuate bulging portion 9 and forms a horizontally extending space having a circular cross section therebetween.

Reference numeral 19 denotes a connecting pipe portion having a circular cross section. The connecting pipe portion 19 extends downward from the central portion of the lower surface of the arcuate bulging portion 9. The connecting pipe portion 19 is opened and communicated with the side facing the horizontally extending space.
A discharge path 21 is constituted by the horizontal space and a vertical space in the connecting pipe portion 19 continuous thereto, and one end of the discharge path 21 communicates with the discharge port 15 and is the lower end of the connecting pipe portion 19. The other end is open. A female screw is formed on the inner wall surface on the lower end side.
The outer peripheral surface of the annular protrusion 11 of the lid body 7 is screwed into the inner wall surface of the cyclone cylinder 3 and is assembled integrally.

Reference numeral 23 denotes an upper spiral plate (also referred to as a helical plate). A through hole 25 is formed in the central portion of the upper spiral plate 23, and a spiral groove 27 is formed in the outer peripheral portion.
The upper spiral plate 23 is accommodated in the lid body 7 of the lid portion 5. The upper surface of the upper spiral plate 23 abuts on the lower surface of the connecting pipe portion 19 of the lid portion 5 and is fixed via an appropriate fixing means such as an adhesive. The hole diameter of the through hole 25 is set to be approximately the same as the tube diameter of the connecting pipe portion 19.

By fixing the upper spiral plate 23, the lower opening of the lid body 7 is closed except for the outer peripheral portion, and a spiral blowout is made between the spiral groove 27 of the upper spiral plate 23 and the inner wall surface of the lid body 7. A path 29 is formed. When the compressed gas enters the blowing path 29 from above, a turning force is applied and blows downward.
The space between the inlet 13 and the upper spiral plate 23 in the lid main body 7 constitutes a pressure chamber 31, and the compressed air that has flowed in is temporarily filled there and further compressed. The space constituting the pressure chamber 31 has an annular shape immediately above the upper spiral plate 23.

Reference numeral 33 denotes a discharge cylinder having a circular cross section, and the discharge cylinder 33 is open at both the upper and lower ends. The discharge cylinder 33 has an upper stage formed with a small diameter, a middle stage extending downwardly in a tapered shape, and a lower stage formed with a large diameter. A male screw is formed on the upper outer peripheral surface of the upper stage.
The discharge cylinder 33 is inserted into the through hole 25 of the upper spiral plate 23 from the lower side, and further screwed into the inner peripheral surface of the connection pipe portion 19 of the lid body 7 to be integrated.
An annular space between the inner wall surface of the cyclone cylinder 3 and the outer wall surface of the discharge cylinder 33 constitutes a cyclone chamber 35.

Reference numeral 37 denotes a drain valve. On the outer peripheral side of the upper surface of the drain valve 37, an annular groove 39 recessed downward is formed, and a plurality of drain holes 41 are formed therein. A communication hole 43 is formed at the center of the upper surface of the drain valve 37.
A male screw is formed on the upper part of the side surface of the drain valve 37, and this side surface is screwed onto the inner wall surface of the cyclone cylinder 3 to be integrated. The communication hole 43 is positioned coaxially with the discharge cylinder 33.

Next, the separating action will be described with reference to FIG.
The compressed air that has flowed in from the inflow port 13 is further compressed in the upper pressure chamber 31 as indicated by an arrow, and then passes through the blowing path 29 to be sufficiently swirled, and then the cyclone chamber 35. Be blown in.
The compressed air descends in the cyclone chamber 35 while turning at high speed along the inner wall. At that time, since centrifugal force is applied to the water, it collides with the inner wall and is separated as water droplets. When the compressed air from which moisture has been separated and removed in this manner collides with the upper surface of the drain valve 37, the compressed air finishes turning, flows in from the lower end opening of the discharge cylinder 33, rises in the pipe, passes through the discharge path 21, and is discharged. It is discharged out of the apparatus from the outlet 15.

On the other hand, the water drops gradually increase along with the surrounding water drops, and descend in a spiral shape along the inner wall due to their own weight.
Then, it falls onto the drain valve 37 and falls into the drain valve 37 from the drain hole 41.

  According to the separation device 1, the centrifugal force acting on the moisture and the like in the swirling flow can be increased by 300 to 2,000 times the own weight in a normal gravitational field, and the structure and manufacture are simple. However, a sufficient centrifugal effect can be obtained.

A cyclonic centrifuge 51 according to a second embodiment will be described with reference to FIGS.
The parts common to the separation apparatus 1 according to the first embodiment are denoted by the same reference numerals, the description thereof is omitted, and only different parts are described below.
In the separation device 51, a lower spiral plate 53 is further provided. The lower spiral plate 53 has almost the same structure as the upper spiral plate 23, but an annular groove 55 is formed on the upper surface side.
In addition, a plurality of communication holes 57 are formed in the lower part of the side surface of the discharge cylinder 33.

The lower spiral plate 53 is fitted and fixed to the lower part of the cyclone cylinder 3. The lower end of the discharge cylinder 33 is inserted into the annular groove 55 of the lower spiral plate 53 from above, and the lower end opening of the discharge cylinder 33 is closed by the lower spiral plate 53.
The cyclone chamber 35 is closed vertically except for its outer peripheral portion by fixing the lower spiral plate 53, and spirally formed between the spiral groove 27 of the lower spiral plate 53 and the inner wall surface of the lid body 7. The moisture induction path 59 is formed.

Next, the separation action will be described.
The compressed air that has flowed in from the inflow port 13 is blown into the cyclone chamber 35 as a swirling flow as in the separation device 1 according to the first embodiment, and descends while centrifuging moisture. When the compressed air from which moisture has been separated and removed in this way reaches the upper surface of the lower spiral plate 53, it pushes the water droplets on the inner wall surface of the cyclone cylinder 3 into the moisture induction path 59 and itself lower spiral. After moving on the plate-shaped plate 53 toward the center, it flows into the outer peripheral portion from the communication hole 57 of the discharge cylinder 33 and rises in the pipe, and then passes through the discharge path 21 and is discharged out of the apparatus through the discharge port 15.

On the other hand, the water droplet pushed into the moisture guiding path 59 falls on the drain valve 37 while turning, and falls into the drain valve 37 from the drain hole 41. Since the water droplet is given a turning force directed downward, it does not flow backward.
Therefore, according to the separation device 51, moisture can be separated and removed with higher accuracy.

  The embodiment of the present invention has been described in detail above. However, the specific configuration is not limited to this embodiment, and the present invention can be changed even if there is a design change without departing from the gist of the present invention. included.

  The separation device of the present invention is not limited to removing moisture from an air flow for a paint gun, and can be used as a separation device for various applications, for example, removing bacteria from an air flow used for dental treatment. .

1 is an exploded perspective view of a cyclonic separator according to a first embodiment of the present invention. It is the perspective view which looked at the cover part of the separation apparatus of FIG. 1 from the back side. It is a partial side sectional view of the separation device of FIG. It is explanatory drawing of the separation effect | action of the separation apparatus of FIG. It is a disassembled perspective view of the cyclonic separator which concerns on the 2nd Embodiment of this invention. FIG. 6 is a partial side cross-sectional view of the separation device of FIG. 5.

Explanation of symbols

1 .. Cyclone separation device (first embodiment)
DESCRIPTION OF SYMBOLS 3 ... Cyclone cylinder 5 ... Lid part 7 ... Lid main body 9 ... Arc-shaped swelling part 11 ... Ring-shaped protrusion 13 ... Inlet 15 ... Discharge port 17 ... Arc-shaped receiving part 19 ... Connection pipe part 21 ... Discharge path 23 ... Upper spiral Plate 25 ... Through hole 27 ... Spiral groove 29 ... Blowout path 31 ... Pressure chamber 33 ... Drain tube 35 ... Cyclone chamber 37 ... Drain valve 39 ... Annular groove 41 ... Drain hole 43 ... Communication hole 51 ... Cyclone centrifugal separator (Second Embodiment)
53 ... Lower spiral plate 55 ... Annular groove 57 ... Communication hole 59 ... Moisture induction path

Claims (3)

A cyclonic separation device for separating substances and microorganisms contained in compressed gas,
A cyclone cylinder, a discharge cylinder coaxially inserted into the cyclone cylinder, and an annular space between the cyclone cylinder and the discharge cylinder are vertically partitioned to flow into the cyclone cylinder from above. A cyclonic separation apparatus comprising: a spiral plate that applies a swirling force to the compressed gas and sends the compressed gas downward; and a pressure chamber provided on the spiral plate. In the cyclonic separator according to claim 1,
A communication hole is formed in the lower portion of the side wall of the discharge cylinder, and a spiral plate having an opening at the center is disposed in the lower portion of the cyclone cylinder, and the lower end opening of the discharge cylinder is partitioned by the spiral plate. A cyclonic separator characterized by being closed. In the cyclonic separator according to claim 1 or 2,
The upper end of the cyclone cylinder is closed by a lid portion, and the lid portion opens downwardly in a concave shape, a pair of openings formed to face the side walls of the lid body, and the lid body It has a discharge path formed in a recess and having one end communicating with one of the openings and the other end communicating with an upper end opening of a discharge cylinder, wherein one of the openings is a discharge port and the other is an inflow port. Cyclone separation device.

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