JP2024009580A - Oil-water separator - Google Patents

Abstract

To provide an oil-water separator that can shorten a time necessary for water removal by preventing water removal in oil from becoming nonuniform.SOLUTION: An oil-water separator includes: a discharge head disposed in an oil tank and including multiple discharge ports; and an air pipe connecting to the discharge head for supplying air from an air source to the discharge head. The discharge head discharges the air supplied from the air pipe into the oil tank through the multiple discharge ports. The multiple discharge ports are arranged in at least one of a lower part and a side part of the discharge head.SELECTED DRAWING: Figure 1

Description

The present invention relates to an oil-water separator that removes water from oil.

Patent Document 1 discloses an oil-water separator that removes water from oil. This device is disposed on the bottom side of a tank that stores oil, and includes a foam generating means that turns air supplied from an air introduction pipe into foam and releases it into the oil. The air released from the foam generating means takes in water in the oil while rising through the oil due to buoyancy, and is discharged from the oil to the outside of the tank.

Japanese Patent Application Publication No. 2000-279707

However, in the oil-water separator according to Patent Document 1, a large amount of air is released into the oil in a portion of the foam generating means near the air introduction pipe due to the influence of buoyancy. Therefore, air is not sufficiently distributed in the portion of the foam generating means that is far from the air introduction pipe, and less air is released into the oil. This results in non-uniform distribution of air released from the bubble generating means. Therefore, removal of water from the oil becomes uneven, and the time taken to remove water becomes longer.

Therefore, an object of one aspect of the present disclosure is to provide an oil-water separation device that can suppress uneven removal of moisture from oil and shorten the time required for moisture removal.

An oil-water separator according to one aspect of the present disclosure includes a discharge head disposed in an oil tank and including a plurality of discharge ports, and an air pipe connected to the discharge head and supplying air from an air supply source to the discharge head. , the discharge head discharges air supplied from the air piping into the oil tank through the plurality of discharge ports, and the plurality of discharge ports are arranged at at least one of a lower portion and a side portion of the discharge head. It has been placed.

According to one aspect of the present disclosure, it is possible to suppress uneven distribution of air emitted from the ejection head. Therefore, the time required to remove water from oil can be shortened.

FIG. 1 is a front view of an oil-water separator according to an embodiment of the present invention. FIG. 2 is a front view of the oil-water separator of FIG. 1 arranged inside an oil tank and with a hook member, a mounting table, etc. attached. FIG. 3 is a perspective view of the oil-water separator shown in FIG. 2; FIG. 3 is a plan view of the oil-water separator of FIG. 2 seen from below. FIG. 3 is a sectional view of a discharge pipe of the oil/water separator shown in FIG. 2; FIG. 3 is a perspective view of the oil-water separator of FIG. 2 with components placed on a mounting table. FIG. 6 is a cross-sectional view of the discharge pipe of FIG. 5 with the internal space filled with oil; FIG. 6 is a cross-sectional view of the discharge pipe of FIG. 5 in a state in which a portion of the oil in the internal space has been discharged; FIG. 6 is a cross-sectional view of the discharge pipe of FIG. 5 in a state in which all the oil in the internal space has been discharged and air has been discharged from the discharge port.

EMBODIMENT OF THE INVENTION Hereinafter, the oil-water separation apparatus based on embodiment of this invention is demonstrated with reference to an accompanying drawing. FIG. 1 shows a front view of an oil-water separator 1 according to an embodiment.

The oil/water separator 1 is disposed in an oil tank 2 (FIG. 2), which will be described later, and includes a discharge head 3 that discharges air, and an air pipe 4 that supplies air from an air supply source to the discharge head 3. The ejection head 3 includes a plurality of ejection ports 3a (FIG. 4), which will be described later. In this embodiment, the plurality of ejection ports 3a are formed at the lower part of the ejection head 3. The discharge head 3 is connected to an air pipe 4. An air supply source 9 (FIG. 2) is connected to the upstream side of the air pipe 4, and is configured to be able to supply the air supplied from the air supply source 9 to the air pipe 4 to the ejection head 3.

The above-mentioned oil-water separator 1 is arranged inside an oil tank 2, and oil from which water is to be removed is stored in the oil tank 2, and air is discharged from a plurality of discharge ports 3a of a discharge head 3. Water is removed from the oil by passing the air inside the oil. The removal of moisture from oil using the oil-water separator 1 will be explained with reference to FIGS. 2 to 8.

FIG. 2 shows a front view of the oil-water separator 1 and the oil tank 2 in a state where the oil-water separator 1 is arranged inside the oil tank 2. As shown in FIG. The oil tank 2 has a shape capable of storing oil, and has a storage space S1 for storing oil. In this embodiment, the oil tank 2 has a rectangular parallelepiped shape. Examples of the oil include rust preventive oil, cutting oil, lubricating oil, and fuel. The oil tank 2 has a bottom wall 2a that forms the lower part of the storage space S1, and four side walls 2b that extend upward from the bottom wall 2a and surround the sides of the storage space S1. In the oil tank 2, the upper part of the storage space S1 is open. In this embodiment, oil is stored inside the oil tank 2 so that the oil partially occupies the storage space S1. In FIG. 2, the liquid level of oil stored in the oil tank 2 is indicated by L1. In FIG. 2, for convenience of explanation, the side wall 2b of the oil tank 2 is seen through, and the internal configuration of the oil tank 2 is illustrated.

Inside the oil tank 2, a discharge head 3 and an air pipe 4 are arranged. The discharge head 3 is immersed in oil stored in the oil tank 2. A part of the air pipe 4 is arranged inside the oil tank 2. Therefore, the air pipe 4 includes an external air pipe 4a arranged outside the oil tank 2 and an internal air pipe 4b arranged inside the oil tank 2. As shown in FIG. 2, a flow meter 7 capable of measuring the flow rate of air flowing inside the air pipe 4 may be attached to the external air pipe 4a. Further, the external air pipe 4a may be provided with a device (eg, a moisture removal filter) for previously removing moisture from the air supplied toward the inside of the oil tank 2.

The internal air pipe 4b extends in the vertical direction V1 inside the oil tank 2. The internal air pipe 4b is connected to the ejection head 3 at a connecting portion 4d located at the downstream end in the direction in which air is supplied. Note that the air pipe 4 and the discharge head 3 may be connected without providing the connecting portion 4d. Therefore, air supplied from the air supply source 9 is supplied to the ejection head 3 through the external air piping 4a and the internal air piping 4b.

Further, as shown in FIG. 2, a hook member 5 may be attached to the oil/water separator 1. The hook member 5 is used to lift the oil-water separator 1 when disposing the discharge head 3 and the air pipe 4 inside the oil tank 2 or when taking them out from the oil tank 2. The shape of the hook member 5 is, for example, a ring shape. For example, a crane can be used to lift the hook member 5. Further, as shown in FIG. 2, a mounting table 6 may be attached to the oil-water separator 1. The mounting table 6 is used to place a component to be subjected to rust prevention treatment above the discharge head 3 when the oil/water separator 1 performs the rust prevention treatment on the component. Further, as shown in FIG. 2, an air supply source 9 is installed in the oil-water separator 1 and is disposed at a position upstream of the air pipe 4 of the oil-water separator 1 and supplies air to the air pipe 4. You can. Air supplied from the air supply source 9 to the air pipe 4 is supplied to the discharge head 3, and by discharging the air from the discharge head 3, moisture is removed from the oil stored inside the oil tank 2. In this embodiment, the removal of moisture in oil means that the moisture in oil becomes below an arbitrary standard as a result of discharging air from the ejection head 3 and discharging moisture from the oil to the outside.

FIG. 3 shows a perspective view of the oil-water separator 1, and FIG. 4 shows a plan view of the oil-water separator 1 seen from below. 3 and 4, for convenience of explanation, the bottom wall 2a and side wall 2b of the oil tank 2 are seen through, and the internal configuration of the oil tank 2 is illustrated. FIG. 5 shows a cross-sectional view of the ejection head 3 along a plane perpendicular to the direction in which air is supplied.

The ejection head 3 includes a plurality of ejection ports 3a. The ejection head 3 is connected to an air pipe 4 that allows air to flow inside the ejection head 3 . The discharge head 3 discharges air supplied from the air pipe 4 into the oil tank 2 through the plurality of discharge ports 3a.

The ejection head 3 has an internal space S2 (see FIG. 7) filled with air. The plurality of discharge ports 3a are each configured to communicate with the internal space S2. Therefore, the internal space S2 of the discharge head 3 and the storage space S1 of the oil tank 2 communicate with each other via the plurality of discharge ports 3a. Further, the discharge head 3 has a housing 3b and an inlet 3c that supplies air to the housing 3b.

As shown in FIG. 4, the discharge head 3 includes two pipes 3d. The two pipes 3d each have an upstream bent portion 3f and a downstream bent portion 3g. In FIG. 4, the two pipes 3d are attached at right angles at the joint 3e and extend along the side wall 2b of the oil tank 2 from the joint 3e to the upstream bend 3f. Note that the upstream bent portion 3f and the downstream bent portion 3g may be formed integrally with the two pipes 3d, or may be formed separately.

The two pipes 3d are each bent at an upstream bending portion 3f, and then extend in directions parallel to each other. Moreover, the two pipes 3d are bent again at the downstream bending portion 3g. The two pipes 3d extend toward each other toward the downstream side from the downstream bent portion 3g, and extend along the side wall 2b of the oil tank 2.

The two pipes 3d each have an upstream pipe 3h extending in a direction away from each other from the joint portion 3e to an upstream bending portion 3f, and an upstream pipe 3h extending parallel to each other between the upstream bending portion 3f and the downstream bending portion 3g. The discharge pipe 3i has a discharge port 3a extending as shown in FIG. The two pipes 3d are closed at their ends 3k. In this embodiment, in each of the two pipes 3d, only the discharge pipe 3i is provided with a discharge port 3a. Note that the plurality of discharge ports 3a are not limited to the discharge pipe 3i, and may be provided at any position of the discharge head 3.

As shown in FIG. 4, the ejection head 3 includes a joint portion 3e. The joint portion 3e connects the two pipes 3d of the discharge head 3 to the air pipe 4. The joint part 3e can also connect the plurality of pipes 3d and the air piping 4, and branch the plurality of pipes 3d from the joint part 3e. In this embodiment, the joint portion 3e connects a plurality of pipes 3d and air piping 4, and branches into two. The upstream bent portion 3f, the downstream bent portion 3g, the upstream pipe 3h, the downstream pipe 3j, and the joint portion 3e may be used as appropriate depending on the shape of the oil tank and the design of the oil/water separator. good.

As shown in FIG. 5, the ejection head 3 can be divided into an upper portion 3m, a side portion 3n, and a lower portion 3p in the vertical direction V1. That is, assuming that there is enough oil in the oil tank 2 to immerse the discharge head 3, the part closest to the oil level L1 is the upper part 3m, the furthest part is the lower part 3p, and the part in between is the side part. It can be made into part 3n. When the planes above and below the discharge pipe 3i in the discharge head 3 are arranged so as to be parallel to the liquid level L1 (for example, when the cross section of the discharge pipe 3i is rectangular or square), The plane closest to the liquid surface L1 can be the upper part 3m, the plane furthest from the liquid level L1 can be the lower part 3p, and the part between the upper part 3m and the lower part 3p can be the side part 3n. In addition, if there is no plane parallel to the liquid level L1 at the position closest to the liquid level L1 of the discharge pipe 3i in the discharge head 3 (for example, if the cross section of the discharge pipe 3i is circular), the liquid level L1 may be closest to the liquid level L1. The area that is located nearby and is required when a discharge port is provided is the upper part 3m, the area facing the upper part 3m in the vertical direction V1 is the lower part 3p, and the part between the upper part 3m and the lower part 3p is the side part 3n. be able to.

FIG. 5 shows a cross-sectional view of the discharge pipe 3i in the discharge head 3. As shown in FIG. The shape of the ejection head 3 is, for example, a square tube shape or a circular tube shape, but is not limited thereto. The plurality of ejection ports 3a are arranged at least one of the lower part 3p and the side part 3n of the ejection head 3, and preferably, the plurality of ejection ports 3a are arranged at the lower part 3p of the ejection head 3. Further, preferably, the plurality of discharge ports 3a are arranged at equal intervals. In this embodiment, the plurality of ejection ports 3a are provided in a row at equal intervals in the lower part 3p of the ejection head 3 along the longitudinal direction. In a portion of the ejection head 3 above the ejection port 3a, an internal space S2 of the ejection head 3 is closed by a housing 3b. The upper portion 3m of the ejection head 3 does not have an ejection port and closes the internal space S2 from above.

FIG. 5 shows a discharge head 3 having a circular tubular shape. When the ejection head 3 is in the shape of a circular tube, for example, if it is located closest to the liquid level L1 and a ejection port is provided, the area required is the upper 3m, and the area opposite the upper 3m in the vertical direction V1 is The lower part 3p can be used as the lower part 3p, and the part between can be used as the side part 3n. In this embodiment, when the center 3q of the outlet 3a is located at the lower part 3p, the outlet 3a is located at the lower part 3p, and when the center 3q of the outlet 3a is located at the side 3n, the outlet 3a is located at the side 3p. 3n, and when the center 3q of the discharge port 3a is located at the top 3m, the discharge port 3a is located at the top 3m.

The internal air piping 4b has a piping portion 4c and a connecting portion 4d. A connecting portion 4d of the internal air pipe 4b is connected to an inlet 3c in the discharge head 3. In this embodiment, the piping portion 4c is arranged in the storage space S1 of the oil tank 2 at a position close to the side wall 2b of the oil tank 2 so as to extend in the vertical direction V1.

The two pipes 3d each have an upstream pipe 3h and a downstream pipe 3j. A hook member 5 is connected to each of the upstream pipe 3h and downstream pipe 3j of the two pipes 3d. The hook member 5 includes a bridge portion 5a that connects two pipes to each other, a pole portion 5b extending upward from the bridge portion 5a, and a hook portion 5c attached to the upper end of the pole portion 5b. are doing. The hook member 5 includes an upstream hook portion 5d connected to the upstream pipe 3h of the two pipes 3d, and a downstream hook portion 5e connected to the downstream pipe 3j of the two pipes 3d.

The upstream hook portion 5d and the downstream hook portion 5e are connected to the upstream pipe 3h and the upstream pipe 3j of the two pipes 3d, respectively. The oil-water separator 1 can be raised and lowered using the upstream hook part 5d and the downstream hook part 5e. For example, when performing rust prevention treatment on parts, the upstream hook part 5d and the downstream hook part 5e are raised or lowered using a crane or the like, so that the discharge head 3, air pipe 4, and mounting It becomes possible to easily install or pull up the mounting stand 6 (including parts to be subjected to anti-corrosion treatment).

The mounting table 6 includes an upstream mounting table 6a disposed on the upstream side in the direction in which air flows, and a downstream mounting table 6b disposed on the downstream side. The upstream mounting table 6a and the downstream mounting table 6b each have a support plate 6c for supporting the parts to be subjected to rust prevention treatment, and leg parts 6d for supporting the support plate 6c so as not to interfere with the ejection head 3. are doing. The mounting table 6 may be separate from the ejection head 3 or may be integrated with the ejection head 3. The shape of the support plate 6c of the mounting table 6 may be any shape as long as the component can be placed thereon, and is, for example, plate-shaped or box-shaped.

The gap between the discharge head 3 and the bottom wall 2a of the oil tank 2 may be set so as not to impede the discharge of air through the plurality of discharge ports 3a of the discharge head 3. When a plurality of ejection ports 3a are provided at the bottom of the ejection head 3, there is a space between the ejection head 3 and the bottom wall 2a that is sufficient for the air discharged from the plurality of ejection ports 3a to be smoothly exhausted. Just leave a gap. When the plurality of ejection ports 3a are provided on the side of the ejection head 3, a gap may or may not be provided between the ejection head 3 and the bottom wall 2a. In this embodiment, a gap is provided between the discharge head 3 and the bottom wall 2a of the oil tank 2.

The support plate 6c extends in a direction perpendicular to the direction in which the discharge pipe 3i extends when the oil-water separator 1 is viewed from above. The support plate 6c may extend in a direction parallel to the direction in which the discharge pipe 3i extends, or may extend in a direction other than this. The leg portion 6d is attached to the support plate 6c and extends downward from the support plate 6c. The support plate 6c is arranged above the two pipes 3d. Further, the leg portions 6d support the support plate 6c at a position higher than the two pipes 3d so that the support plate 6c passes above the two pipes 3d. The discharge head 3 is arranged so that the two pipes 3d pass between the legs 6d. Moreover, the two pipes 3d are connected to the lower part of the support plate 6c.

In the oil/water separator 1 configured as described above, the operation when rust prevention treatment is performed will be described. When the rust prevention treatment is performed, the discharge head 3 and the air pipe 4 are arranged in the oil tank 2, and the oil to be subjected to the rust prevention treatment is stored in the oil tank 2. When the rust prevention treatment is performed, the parts to be subjected to the rust prevention treatment are placed on the support plate 6c of the mounting table 6. In addition, in the oil-water separator 1, by removing moisture from oil while the parts are immersed in oil, the parts can be subjected to rust prevention treatment.

In this embodiment, for example, a bearing is used as the component to be subjected to rust prevention treatment. FIG. 6 shows a perspective view of the oil/water separator 1 in which a bearing as a component 8 to be subjected to rust prevention treatment is placed on a support plate 6c of a mounting table 6. In this embodiment, a simplified circular ring is illustrated as a component 8 corresponding to a bearing for the sake of explanation. Note that, as described above, when the leg portion 6d lands on the bottom wall 2a of the oil tank 2, there is a gap between the two pipes 3d and the bottom wall 2a, so the parts 8 are placed on the support plate 6c. Even if the parts 8 are placed on the pipes 3d, the load of the parts 8 is not applied to the two pipes 3d.

When the rust prevention treatment is performed on the component 8, air is supplied to the inside of the ejection head 3 via the air pipe 4 while the component 8 is placed on the support plate 6c. When air is supplied to the discharge head 3 and the two pipes 3d of the discharge head 3 are filled with air, when air continues to be supplied to the two pipes 3d, the plurality of discharge ports provided in the two pipes 3d Air is exhausted from 3a. Since the upper part of the oil tank 2 is connected to the outside, air discharged from the plurality of discharge ports 3a rises, passes through the oil stored in the oil tank 2, and is discharged to the outside.

As described above, the air discharged from the plurality of discharge ports 3a takes in moisture contained in the oil in the process of rising from the plurality of discharge ports 3a to the liquid level L1 of the oil stored in the oil tank 2. As the air that has taken in moisture is discharged to the outside, the moisture contained in the oil is discharged to the outside. Thereby, moisture can be removed from the oil stored in the oil tank 2. Further, by continuously supplying air to the two pipes 3d of the discharge head 3 and continuing to pass air through the oil inside the oil tank 2, water contained in the oil can be continuously discharged to the outside.

With reference to FIGS. 7 to 9, the internal state of the ejection head 3 from when air is supplied to the ejection head 3 to when air is discharged from the plurality of ejection ports 3a will be described. 7 to 9 are cross-sectional views of the discharge pipe 3i of the housing 3b in the discharge head 3. 7 to 9, cross-sectional views of the discharge pipe 3i and the plurality of discharge ports 3a are shown.

As shown in FIGS. 7 to 9, the discharge pipe 3i has an internal space S2. Further, in the discharge pipe 3i, a plurality of discharge ports 3a are distributed in the longitudinal direction of the discharge pipe 3i. The longitudinal direction of the discharge pipe 3i is indicated by D1. The plurality of discharge ports 3a are arranged in a line along the longitudinal direction D1 of the discharge pipe 3i.

FIG. 7 shows a cross-sectional view of the discharge pipe 3i in a state where the internal space S2 of the discharge pipe 3i is filled with oil. As shown in FIG. 7, when the discharge head 3 is placed in the oil tank 2 with oil stored in the oil tank 2, the oil enters the internal space S2 of the discharge pipe 3i through the discharge port 3a. , the internal space S2 is filled with oil. Note that the discharge head 3 may be placed in the oil tank 2 while air is being supplied to the internal space S2 of the discharge pipe 3i. In FIG. 7, the oil level in the internal space S2 is indicated by L2. In a state where the internal space S2 is filled with oil, air is supplied to the internal space S2 of the discharge pipe 3i in the discharge head 3 through the air pipe 4.

When air is supplied to the internal space S2, a portion of the oil filling the internal space S2 is discharged to the outside of the discharge pipe 3i through the discharge port 3a. As a result, a part of the oil stored in the internal space S2 is pushed downward by the air and is discharged to the outside via the discharge port 3a. Therefore, a part of the oil stored in the internal space S2 enters the oil stored in the oil tank 2 outside the discharge pipe 3i. A cross-sectional view of the discharge pipe 3i in a state where air is present in the upper part of the discharge pipe 3i and oil is present in the lower part of the discharge pipe 3i due to air being supplied to the internal space S2. The information is shown in FIG. In FIG. 8, the oil level in the internal space S2 is indicated by L2. Furthermore, D2 indicates the direction in which the oil flows when the oil stored in the internal space S2 is discharged to the outside of the discharge pipe 3i through the discharge port 3a.

When air is continuously supplied into the ejection head 3 from the state shown in FIG. 8, the proportion of air in the internal space S2 increases. At this time, as air is supplied to the internal space S2, the oil level L2 moves in the direction D3 inside the discharge pipe 3i.

FIG. 9 shows a cross-sectional view of the discharge pipe 3i in a state where all the air has been exhausted from the internal space S2. When air continues to be supplied into the discharge pipe 3i and all the oil in the internal space S2 is discharged, the internal space S2 is occupied by air, as shown in FIG. After the internal space S2 is filled with air, if air is continued to be supplied into the discharge pipe 3i, the air is discharged to the outside of the discharge head 3 through the plurality of discharge ports 3a. The air discharged from the plurality of discharge ports 3a rises through the oil stored in the oil tank 2, passes through the liquid level L1 of the oil, and is discharged to the outside of the oil. At this time, after the air is discharged from the discharge port 3a, it rises through the oil and takes in moisture contained in the oil, and is discharged to the outside of the oil together with the taken-in moisture.

According to this embodiment, the plurality of ejection ports 3a are arranged at the lower part 3p of the ejection head 3. The entire interior space S2 can be filled with air by supplying air to the discharge pipe 3i until it is discharged into the oil. Therefore, air can be discharged from the plurality of discharge ports 3a while the internal space S2 is filled with air and the pressure of the air is stabilized, so that air can be stably discharged from the plurality of discharge ports 3a.

Moreover, in this embodiment, the plurality of discharge ports 3a are arranged in a line at equal intervals at the lower part of the discharge pipe 3i. Therefore, air can be stably discharged from the plurality of discharge ports 3a from a state in which air is stored inside the discharge pipe 3i.

Moreover, when the plurality of discharge ports 3a are provided at the lower part of the discharge pipe 3i, when air is released from the plurality of discharge ports 3a, a sufficient amount of air is stored inside the discharge pipe 3i. Therefore, even if there is a pressure fluctuation in the air supplied to the inlet 3c of the discharge head 3, the pressure fluctuation can be absorbed by the air stored inside the discharge pipe 3i. Therefore, air can be stably discharged from the plurality of discharge ports 3a while absorbing pressure fluctuations.

Further, according to the present embodiment, in the vertical direction V1 of the ejection head 3, the plurality of ejection ports 3a are provided at the same position on the ejection pipe 3i. Air stored inside the discharge pipe 3i is discharged from the plurality of discharge ports 3a at a constant timing. Therefore, when air is discharged from the plurality of discharge ports 3a, the air can be stably discharged from the plurality of discharge ports 3a.

Further, according to the present embodiment, the plurality of discharge ports 3a are distributed in the longitudinal direction of the plurality of pipes 3d arranged at intervals in the horizontal direction. Since the plurality of discharge ports 3a are arranged over a wide range in the oil tank 2, water in the oil can be removed over a wide range.

Further, according to the present embodiment, the component 8 to be subjected to rust prevention treatment is installed on the support plate 6c of the mounting table 6 disposed above the ejection head 3, and the component 8 is subjected to the rust prevention treatment. The rust prevention treatment can be performed by placing the component 8 on the mounting table 6 while removing moisture from the rust prevention oil. In this case, the air discharged from the discharge head 3 can cause convection in the antirust oil around the component 8 . Therefore, by the convection of the rust-preventing oil around the part 8, the part 8 can be rust-prevented with the oil from which moisture has been sufficiently removed.

Moreover, according to this embodiment, the plurality of discharge ports 3a are provided at the lower part 3p of the discharge pipe 3i, and air is discharged downward. Therefore, the air discharged from the plurality of discharge ports 3a travels downward, then rises, and is discharged from the oil level L1 to the outside. Therefore, water can be removed from a deeper position in the oil stored in the oil tank 2.

In addition, in the said embodiment, although the several discharge outlet 3a was demonstrated in the lower part 3p of the discharge pipe 3i, it is not limited to the said embodiment. For example, a plurality of discharge ports 3a may be provided on the side portion 3n of the discharge pipe 3i. By disposing the discharge port 3a in at least one of the lower portion 3p and the side portion 3n of the discharge head 3, air is temporarily stored in the internal space S2 when filling the inside of the discharge pipe 3i with air. Further, the plurality of discharge ports 3a may not be arranged in a line along the longitudinal direction of the discharge pipe 3i. For example, the plurality of discharge ports 3a may be arranged in a plurality of rows or may be arranged randomly.

Further, in the above embodiment, a configuration in which the ejection head 3 has two pipes 3d has been described, but the present invention is not limited to the above embodiment. The number of pipes 3d may be other than two. The number of pipes 3d may be three or more, or may be one.

Further, in the above embodiment, a configuration has been described in which each of the two pipes 3d has a discharge pipe 3i extending parallel to each other, but the present invention is not limited to the above embodiment. The two pipes 3d do not need to have portions extending parallel to each other.

As mentioned above, the embodiment has been described as an example of the technology disclosed in this application. However, the technology in the present disclosure is not limited to this, and can also be applied to embodiments in which changes, replacements, additions, omissions, etc. are made as appropriate. Furthermore, it is also possible to create a new embodiment by combining the components described in the above embodiments. For example, some configurations or methods in one embodiment may be applied to other embodiments, and some configurations in an embodiment may be optionally used separately from other configurations in that embodiment. Extractable. In addition, some of the components described in the attached drawings and detailed description include not only components that are essential for solving the problem, but also components that are not essential for solving the problem in order to exemplify the technology. Also included.

Each of the following items is a disclosure of a preferred embodiment.

[Item 1]
a discharge head disposed in the oil tank and including a plurality of discharge ports;
an air pipe connected to the ejection head and supplying air from an air supply source to the ejection head,
The discharge head discharges air supplied from the air pipe to the oil tank through the plurality of discharge ports,
The plurality of discharge ports are arranged in at least one of a lower portion and a side portion of the discharge head.

[Item 2]
The discharge head includes a plurality of pipes arranged at intervals from each other, and a joint part that connects the plurality of pipes to the air piping,
The oil/water separator according to item 1, wherein the joint portion connects the air pipe and the plurality of pipes, and branches the plurality of pipes.

[Item 3]
The oil/water separator according to item 1 or 2, wherein the plurality of discharge ports are distributed in the longitudinal direction of the discharge head.

[Item 4]
The oil-water separator according to any one of items 1 to 3, wherein the plurality of discharge ports are arranged at a lower part of the discharge head.

[Item 5]
The oil/water separator according to any one of items 1 to 4, wherein the plurality of discharge ports are provided at the same position in the vertical direction of the discharge head.

[Item 6]
The oil-water separator according to any one of items 1 to 5, wherein the plurality of discharge ports are provided at equal intervals on the discharge head.

[Item 7]
The oil-water separator according to any one of items 1 to 6, further comprising a mounting table above the ejection head.

1 Oil/water separator 2 Oil tank 3 Discharge head 3a Discharge port 3d Pipe 3e Joint part 3m Upper part 3n Side part 3p Lower part 4 Air piping 5 Hook member 6 Mounting table 9 Air supply source D1 Longitudinal direction V1 Vertical direction

Claims (7)

a discharge head disposed in the oil tank and including a plurality of discharge ports;
an air pipe connected to the ejection head and supplying air from an air supply source to the ejection head,
The discharge head discharges air supplied from the air pipe to the oil tank through the plurality of discharge ports,
The plurality of discharge ports are arranged in at least one of a lower part and a side part of the discharge head. The discharge head includes a plurality of pipes arranged at intervals from each other, and a joint part that connects the plurality of pipes to the air piping,
The oil-water separator according to claim 1, wherein the joint portion connects the air pipe and the plurality of pipes, and branches the plurality of pipes. The oil-water separator according to claim 1, wherein the plurality of discharge ports are distributed in the longitudinal direction of the discharge head. The oil-water separator according to claim 1, wherein the plurality of discharge ports are arranged at a lower part of the discharge head. The oil-water separator according to claim 1, wherein the plurality of discharge ports are provided at the same position in the vertical direction of the discharge head. The oil-water separator according to claim 1, wherein the plurality of discharge ports are provided at equal intervals in the discharge head. The oil-water separator according to any one of claims 1 to 6, further comprising a mounting table above the discharge head.

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