Gas-liquid separation device

Abstract

To provide a gas-liquid separator capable of reducing abnormal noise caused by gas passing through a gas discharge passage provided in a container.SOLUTION: The gas-liquid separation device 1 includes the vessel 2 to which the high-pressure air is supplied from the outside and in which the flow path for discharging the gas contained in the high-pressure air to the outside is formed, the guide portion 13 which has the collision surface 13a with which the high-pressure air supplied to the vessel 2 collides, separates the gas and the liquid in the high-pressure air from each other by causing the high-pressure air to collide with the collision surface 13a, and guides the gas in the predetermined direction, and the abnormal noise reduction unit (jig 24) which reduces the abnormal noise caused by the gas passing through the flow path 23.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a gas-liquid separator that removes liquid such as moisture contained in gas such as high-pressure air and discharges the gas from which the liquid has been removed. [Background technology]

[0002] Gas-liquid separators have been known as devices for removing moisture contained in air supplied to devices such as air motors and air breakers. One proposed gas-liquid separator includes a hollow cylindrical container, a gas inlet provided in the lower part of the side of the cylindrical container, a gas outlet provided in the upper part of the cylindrical container, and a guide section that separates the high-pressure air flowing in from the gas inlet into an air component and a liquid component by causing the air component to collide with a collision surface, and then releases the air component in a direction along the inner wall surface of the cylindrical container (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-269524 Summary of the Invention [Problem to be solved by the invention]

[0004] In the prior art including Patent Document 1, gas rotating in a spiral at high speed along the inner wall surface of the cylindrical container is suddenly discharged from a gas discharge port located above the cylindrical container and having a predetermined stroke, which causes a certain level of abnormal noise (resonance noise) depending on the gas flow rate and speed. However, the prior art did not disclose any measures to reduce the abnormal noise.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a gas-liquid separator that can reduce abnormal noise caused by gas flowing into a gas discharge flow path. [Means for solving the problem]

[0006] The gas-liquid separation device of the present invention comprises a container into which high-pressure air is supplied from the outside and which has a flow path formed for discharging the gas contained in the high-pressure air to the outside, a guide which has a collision surface against which the high-pressure air supplied to the container collides, and which separates the gas and liquid in the high-pressure air by causing the high-pressure air to collide with the collision surface and guides the gas in a predetermined direction, and noise reduction means which reduces noise caused by the gas passing through the flow path. [Effects of the Invention]

[0007] According to the present invention, it is possible to reduce abnormal noise caused by gas passing through a gas discharge flow path. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a front view of a gas-liquid separation device according to an embodiment of the present invention. [Figure 2] FIG. 1 is a longitudinal cross-sectional view of a gas-liquid separation device according to an embodiment of the present invention. [Figure 3] FIG. 1 is a partial cross-sectional perspective view of a container body included in a gas-liquid separator according to an embodiment of the present invention; [Figure 4] FIG. 1 is a partial vertical cross-sectional view of a lid portion constituting a container provided in a gas-liquid separation device according to an embodiment of the present invention. [Figure 5] FIG. 1A is a front view of a jig provided in a gas-liquid separation device according to an embodiment of the present invention; FIG. 1B is a plan view of the jig; and FIG. 1C is a view taken along the line A-A' in the plan view. [Figure 6] FIG. 10 is a diagram showing experimental data of a gas-liquid separator according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] A gas-liquid separator according to one embodiment of the present invention will be described with reference to Figures 1 to 5. The gas-liquid separator according to this embodiment has a function of removing moisture contained in high-pressure air supplied from the outside and separating the high-pressure air into a gas in a substantially dry state and moisture.

[0010] 1 and 2, the gas-liquid separator 1 mainly comprises a cylindrical container 2. The container 2 is made of metal and comprises a container body 4 and a lid 5 that is detachable from the top of the container body 4. Gas and water in the pressurized air are separated in an internal space 3 enclosed by the container body 4 and the lid 5. The container body 4 and the lid 5 are fastened and fixed together by fastening members such as bolts 6.

[0011] 2 and 3, the container body 4 is open at the top, and a plurality of openings 9 are formed in a substantially concentric pattern at the bottom 7 for discharging moisture collected from the high-pressure air into an auto-drain 8. A high-pressure air inlet pipe 10 having an internal flow path 10a through which high-pressure air supplied from the outside flows in is provided on the side of the lower part of the container body 4. The high-pressure air inlet pipe 10 is connected to an external supply pipe 11, and the high-pressure air supplied from the supply pipe 11 flows into the container body 4 through the flow path 10a.

[0012] A guide section 13 is provided in the container body 4 at a position facing the flow path 10a. The vertical cross section of the guide section 13 is roughly square-shaped and curved along the inner circumferential surface 4a of the container body 4. The guide section 13 and the flow path 10a are in communication with each other via an opening 14 that opens at a predetermined position in the container body 4 and the guide section 13. The guide section 13 has a collision surface 13a (FIG. 2) against which the high-pressure air flowing in from the flow path 10a collides, and an opening 13b (FIG. 3) is formed on one end side along the inner circumferential surface 4a of the container body 4.

[0013] The container body 4 has an extension 15 that hangs down in the longitudinal direction along the outer edge of the bottom 7, and a female thread (not shown) is formed on the inner peripheral surface of the extension 15. The auto drain 8 is attached to the container body 4 at a position below the bottom 7 by screwing the female thread into a male thread 8a formed on the auto drain 8.

[0014] 2 and 3, in the internal space 3 of the container 2, a receiving plate 16 having a shape recessed downwards at approximately the center in a plan view is provided at a position above the guide portion 13. The receiving plate 16 is fixed to the container 2 by sandwiching an outer edge portion 16a between the container body 4 and the lid portion 5. An opening 16b penetrating in the vertical direction is formed approximately at the center of the receiving plate 16, and gas rising in the internal space 3 passes through the opening 16b and heads toward a discharge opening 22 formed in the lid portion 5, which will be described later.

[0015] Next, the lid part 5 will be described with reference to Figure 4. The lid part 5 is configured to include a cover part 17 that covers the container 2 from above, and a side part 18 that hangs down along the outer periphery of the cover part 17 so as to cover the cover part 17 from the side. The cover part 17 has a thick part 19 located approximately in the center of the underside in a plan view. An insertion opening 21 into which a discharge pipe 20 (Figure 2) is inserted is formed approximately in the center of the cover part 17 including the thick part 19.

[0016] The insertion opening 21 has a predetermined stroke S1 in the vertical direction, and a female thread (not shown) is formed on its inner peripheral surface. A male thread 20a (FIG. 2) is formed on the outer periphery of the lower end of the discharge pipe 20, and the discharge pipe 20 is attached to the lid 5 (container 2) by screwing the male thread 20a into the female thread formed on the inner peripheral surface of the insertion opening.

[0017] The cover portion 17 has a flow path 23 formed therein, which passes through approximately the center of the thick portion 19 from top to bottom and communicates with the insertion opening 21 through a discharge opening 22 that opens from the lower surface 19a of the thick portion 19. The discharge opening 22 is an inlet of the flow path 23 and opens in a circular shape in plan view (therefore, the flow path 23 also opens in a circular shape in plan view).

[0018] The diameter of the discharge opening 22 is smaller than the diameter of the insertion opening 21. Furthermore, the vertical stroke S2 ​​of the flow path 23 is shorter than the vertical stroke S1 of the insertion opening 21 (approximately 1 / 5 of the stroke S1). The gas rising in the internal space 3 flows into the flow path 23 through the discharge opening 22 and is discharged to the discharge pipe 20 attached to the insertion opening 21. The discharge opening 22 and the flow path 23 form a gas discharge section (gas discharge section) in the gas-liquid separation device 1. As an example, the diameter of the discharge opening 22 (flow path 23) is approximately 4.7 mm, and the diameter of the insertion opening 21 is approximately 9.0 mm. In addition, the stroke S1 of the insertion opening 21 is approximately 16.5 mm, and the stroke S of the flow path 23 is approximately 4.0 mm.

[0019] 4 and 5, a jig (part) 24 serving as noise reduction means is attached to the periphery of the discharge opening 22 and the flow path 23. The jig 24 is molded from nylon resin containing carbon powder. The jig 24 includes an annular first covering member 24a that covers the entire inner circumferential surface 19b of the container 2 (thick-walled portion 19 of the lid 5) that forms the flow path 23, and an annular second covering member 24b that is joined to the first covering member 24a and covers the periphery of the inlet of the flow path 23 in the container 2 (the periphery of the discharge opening 22 on the lower surface 19a of the thick-walled portion 19). A tapered surface 24c that tapers toward the gas discharge direction is formed on the inner circumferential surface of the second covering member 24b.

[0020] 3 and 4, a gas-liquid separation method using the gas-liquid separator 1 will be described. High-pressure air supplied from the supply pipe 11 is supplied to the container body 4 through the flow path 10a and the opening 14. The high-pressure air supplied to the container body 4 collides violently with the collision surface 13a of the guide part 13, the flow direction is changed to a direction along the inner circumferential surface 4a of the container body 4, and the air is released from the opening 13b into the internal space 3 extending inside the container 2 (arrow a).

[0021] When the high-pressure air is collided with the collision surface 13a, the gas in the high-pressure air immediately changes direction and is released from the opening 13b, but the water in the high-pressure air cannot change direction instantly and remains in a stagnant state near the collision surface 13a, which is thought to cause the mist-like water particles to combine one after another and become water droplets.

[0022] The gas released from opening 13b rises while rotating spirally at high speed along inner circumferential surface 4a of container body 4 (arrow b) and passes through opening 16b of backing plate 16 (arrow c). The gas that has passed through opening 16b of backing plate 16 flows into flow path 23 from discharge opening 22 provided in lid 5 and is discharged to discharge pipe 20 (arrow d shown in FIG. 4). At this time, the gas flows into flow path 23 while being guided by tapered surface 24c of jig 24.

[0023] Some of the moisture contained in the gas that is rising while rotating spirally at high speed is centrifuged and turns into droplets upon contact with the inner circumferential surface 4a of the container body 4, and eventually flows out toward the bottom 7. In addition, some of the moisture contained in the gas collides with the receiving plate 16 as the gas rises, and adheres to the underside of the receiving plate 16. Then, as the gas flows down along the recessed shape of the receiving plate 16, it turns into droplets and eventually falls toward the bottom 7.

[0024] This allows the capture of moisture that was not completely separated by the guide section 13, or moisture that has risen with the airflow before the separated moisture has completely fallen, before it reaches the discharge section (discharge opening 22, flow path 23). The moisture separated from the high-pressure air in the container 2 falls due to its own weight, and is discharged to the auto-drain 8 through the multiple openings 9 formed in the bottom 7.

[0025] When gas flows from the discharge opening 22 into the flow path 23 and is discharged into the discharge pipe 20, an abnormal noise (resonance noise) may occur near the discharge section depending on the flow rate and speed of the gas. However, in this embodiment, a jig 24 is attached around the discharge opening 22 and to the flow path 23 as a noise reduction means, making it possible to reduce the abnormal noise.

[0026] 6 shows the results of an experiment comparing the volume (dB) of vibration noise generated when the jig 24 (part) of this embodiment is attached with the volume (dB) of vibration noise generated when it is not attached. The experiment involved preparing a gas-liquid separation device 1 (the present invention) with the jig 24 attached and a gas-liquid separation device (conventional device) without the jig 24 attached, and using a commercially available digital sound level meter to measure the volume (dB) generated over a predetermined period of time, a total of six times, with the flow rate (340 L) in the range in which vibration noise is generated fixed.

[0027] As the experimental results show, it was demonstrated that the volume (dB) produced by the gas-liquid separation device 1 with the jig 24 attached was on average 12.42 (dB) lower than the volume (dB) produced by the gas-liquid separation device without the jig 24 attached.

[0028] As described above, the gas-liquid separation device 1 in this embodiment includes a container 2 into which high-pressure air is supplied from the outside and in which a flow path 23 is formed for discharging gas contained in the high-pressure air to the outside, a guide section 13 having a collision surface 13a against which the high-pressure air supplied to the container 2 collides, and which separates the gas and liquid in the high-pressure air by causing the high-pressure air to collide with the collision surface 13a and guides the gas in a predetermined direction, and an abnormal noise reduction means (jig 24) that reduces abnormal noise caused by gas flowing into the flow path 23. This makes it possible to reduce abnormal noise caused by gas passing through the gas discharge flow path 23.

[0029] The present invention is not limited to the embodiments described above, and design changes are possible within the scope of the invention. [Industrial Applicability]

[0030] According to the present invention, it is possible to reduce abnormal noise caused by gas passing through a gas discharge flow path. [Explanation of symbols]

[0031] 1 Gas-liquid separator 2 containers 13 Guide section 13a Collision surface 22 Discharge opening 23 Flow path 24 Jig 24a first covering member 24b Second covering member 24c tapered surface

Claims

1. a container into which high-pressure air is supplied from the outside and which has a flow path formed therein for discharging gas contained in the high-pressure air to the outside; a guide section having a collision surface against which the high-pressure air supplied to the container collides, and separating the gas and liquid in the high-pressure air by causing the high-pressure air to collide with the collision surface and guiding the gas in a predetermined direction; and noise reduction means for reducing noise caused by gas passing through the flow path.

2. The noise reduction means is a first annular covering member that covers an inner circumferential surface of the container that forms the flow path; The gas-liquid separator according to claim 1 , further comprising: a second annular covering member that covers a periphery of the inlet of the flow path in the container.

3. 3. The gas-liquid separator according to claim 2, wherein the second covering member has an inner peripheral surface formed with a tapered surface tapering toward the gas discharge direction.

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