JP3935995B2 - Oil-water separator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil-water separator capable of automatically separating water mixed in an oil storage tank or the like and discharging it out of the system.
[0002]
[Prior art]
An example of a conventional oil / water separator is disclosed in Japanese Utility Model Publication No. 3-83603. This is a partition wall provided in the separator casing, a hollow float having a specific gravity between oil and water is arranged, and a valve body for opening and closing the outlet is connected to this float. The water separated at the partition wall in the casing can be discharged out of the system.
[0003]
[Problems to be solved by the invention]
In the above conventional system, there is a problem that when there is little inflow of water into the separator and oil mainly flows in, the valve port cannot be closed reliably and the oil leaks outside the container. there were. In other words, if the amount of water in the casing is low and oil reaches the lower opening of the partition wall, and a large amount of oil flows in, the weight of the float is almost offset by buoyancy, and the outlet is securely closed. It cannot be done, and the oil leaks out of the vessel. In particular, at locations where mechanical vibrations are transmitted to the oil / water separator, the vibrations cause incomplete closing of the outlet and a large amount of oil leaks out.
[0004]
In the above-mentioned conventional products, the float vibrates when the product is transported, and the vibration is transmitted to the valve seat through the valve body, thereby causing scratches and deformation between the valve body and the valve seat. In addition, there is a problem that oil leakage is further promoted.
[0005]
Depending on the type of oil, leakage of flammable oil and toxic oil to the outside is dangerous and must be reliably prevented.
[0006]
Therefore, the technical problem of the present invention is to prevent the valve body and the valve seat portion from being damaged during product transportation, and to discharge only water even when the amount of water flowing in is small. It is to obtain an oil / water separator in which oil does not leak out of the vessel.
[0007]
[Means for Solving the Problems]
The means of the present invention devised to solve the above problems is to form an oil water inlet, a reservoir, and an outlet in the separator casing, and to separate the oil water flowing into the reservoir by the difference in specific gravity. In the case where the outlet is opened and closed by floating up and down of the float placed in the reservoir and the separated water is discharged outside the vessel, the float has a specific gravity smaller than the specific gravity of water and larger than the specific gravity of the oil. When the flow outlet is directly opened and closed on the outer surface of the lower part of the float, and when the outer surface of the lower part of the float is in contact with the outlet, the outside of the lower part of the float An elastic member is attached to either one or both of the lower outer surface of the float and the contact portion of the outlet so that either one or both of the surface and the contact portion of the outlet is elastically deformed and contacted. Mounting and float The support seat is provided on the lowered position of the lower outer surface, an upper end height of the support seat, in which are arranged to be slightly lower than the upper end of the outlet.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Even if the float vibrates during product transportation, a slight step is provided between the lowered position of the outer surface of the lower part of the float and the end position of the outlet through the elastic member. Since the vibration of the ridge is transmitted to the outflow port side through an elastic member within a range of a slight step, both contact portions are prevented from being damaged.
[0009]
The oil water that has flowed into the reservoir of the casing is separated and stored in the lower part and the oil in the upper part due to the difference in specific gravity. Only when the water reaches the float waterline, the float rises and opens the outlet, so that the water is discharged out of the vessel.
[0010]
When the water is discharged and the waterline is lowered, the float descends with the buoyancy decreased, and the outlet is directly closed at the outer surface of the lower part, so that a predetermined amount of water remains in the reservoir. There is no leakage of oil accumulated in the upper part.
[0011]
In addition, when the outlet is closed on the outer surface of the float, the outlet is more securely sealed by the elastic member being elastically deformed and closed by an amount corresponding to a slight level difference, so that residual water and oil can be sealed. Will not leak.
[0012]
By making the specific gravity of the float smaller than the specific gravity of water and greater than the specific gravity of oil, even if all of the float is submerged in the oil, the float will not float up and the oil will be discharged outside the vessel. Never do.
[0013]
【Example】
Examples of the present invention will be described. In FIG. 1, a separator casing is formed by a main body 1 and a lid 2 to form an oil-water reservoir 3, and an oil-water inlet 4 is provided in the lid 2 and an outlet 5 is provided in the main body 1 for oil-water separation. Configure the vessel.
[0014]
The reservoir 3 communicates with the inflow port 4 and a vertically long float 6 is disposed in a free state in the space. The float 6 has a vertically long shape with a bottomed cylinder, and is provided with a plurality of guides 8, 9, 10, 11 provided in the main body 1 so as to directly open and close the outlet 5 at the center of the lower outer surface 7. It can be moved up and down along. The float 6 can be manufactured as a hollow float by pressing and welding a stainless steel thin plate, or can be manufactured from a synthetic resin having a relatively low specific gravity such as polypropylene or polyethylene. When an elastic member is attached to the float 6 side, an elastic plate member 14 such as synthetic rubber is attached to the lower outer surface 7 in contact with the outlet 5.
[0015]
The outlet 5 is disposed through the center of the valve seat member 12 screwed to the main body 1, and its downstream side communicates with the outlet 13. When attaching an elastic member to the valve seat member 12, that is, the outflow port 5 side, a synthetic rubber seat 15 as an elastic member is attached to the upper end portion of the valve seat member 12 so as to cover the upper side surface and upper end outer peripheral surface of the outflow port 5. Provide in a shape. The synthetic rubber seat 15 is disposed so as to come into contact with the lower outer surface 7 of the float 6.
[0016]
FIG. 1 shows a state in which the float 6 is floating. Stoppers 26 and 27 are provided on the upper portion of the float 6, and the float 6 is disposed on the lower portion of the float 6. Support seats 16 and 17 are provided for supporting the float 6 in the case of the lowering. The upper end height of the support seats 16 and 17 is slightly lower than the upper end portion of the outlet 5, that is, the upper ends of the support seats 16 and 17 are lowered by the H millimeter shown in FIG. Form a slight step H. The distance of the step H can be determined as appropriate depending on the type of the elastic member, but in the present embodiment using synthetic rubber, a step of about 0.1 to 0.5 mm is preferred.
[0017]
A space 18 is formed between the lower portion of the float 6 and the bottom portion of the main body 1 by the support seats 16 and 17, and serves as a storage space for foreign matters such as dust. The separator casing legs 19 and 20 are attached to the lower part of the main body 1, and the pressure equalizing pipe 22 that communicates with the reservoir 3 through the valve 21 and the blower that communicates with the reservoir 3 through the valve 23. Connect the tube 25.
[0018]
The state shown in FIG. 1 shows a state in which the float 6 floats upward and opens the outlet 5. A mixed fluid of oil and water flows in from the inflow port 4 and the water is separated into the lower part 3 and the oil is separated into the upper part and accumulated in the reservoir 3. As the amount of inflowing water increases, the water level in the reservoir 3 rises and reaches the draft line of the vertical float 6, usually about 2/3 of the height of the float 6. As shown in FIG. 1, the float 6 floats up and leaves the valve seat member 12 to open the outlet 5, so that the water accumulated in the lower part is discharged from the outlet 13 to the outside. When water is discharged and the water level drops, the float 6 also descends at the same time, and by closing the outlet 5 with water remaining at the bottom of the reservoir 3, the oil accumulated at the top of the water is leaked. There is no.
[0019]
When the float 6 is lowered, the elastic plate member 14 attached to the center of the lower outer surface 7 and the synthetic rubber seat 15 at the upper end of the valve seat member 12 first come into contact with each other, and each elastic member undergoes elastic deformation. And the outflow port 5 can be closed reliably by the lower part outer surface 7 contacting the support seats 16 and 17.
[0020]
In this embodiment, even when the product is transported, that is, when vibration is applied to the float 6 while the float 6 is lowered, the float is provided via the support seats 16 and 17. 6 is supported by the synthetic rubber seat 15 or the elastic plate-like member 14 because only the amplitude vibration within the elastic deformation corresponding to the slight step H is transmitted to the synthetic rubber seat 15 or the elastic plate-like member 14. Damage to the contact portion is prevented.
[0021]
In this embodiment, the float 6 is formed in a vertically long cylindrical shape, so that a larger volume can be secured in a small space compared to the case of a spherical or prismatic shape, and the weight of the float 6 is also increased. It can be increased in proportion to the volume, and the sealing performance when the outlet 5 is closed can be improved.
[0022]
In this embodiment, since the blow pipe 25 is provided, a compressed air pipe, a steam pipe or the like is connected to the outlet 13 side to flow down to the blow pipe 25 side, so that the valve seat member 12 and the float 6 are flown. The lower space 18 can be back-washed and dust and sludge-like oily water turbidity can be removed to the outside.
[0023]
【The invention's effect】
In the oil / water separator according to the present invention, a slight step is provided between the descending position of the outer surface of the lower part of the float and the end part of the outlet through an elastic member, so that the vibration of the float is slightly reduced. The oil is leaked and discharged by the elastic member being elastically deformed by a slight level when the float is lowered and closing the outflow port. An oil-water separator free of water can be obtained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of an oil / water separator according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 3 Reservoir part 4 Inlet 5 Outlet 6 Float 7 Lower part outer surface 12 Valve seat member 13 Outlet 14 Elastic plate member 15 Synthetic rubber seats 16 and 17 Support seat 25 Blow tube

Claims (1)

An oil water inlet, a reservoir, and an outlet are formed in the separator casing, the oil and water flowing into the reservoir are separated by the difference in specific gravity of each, and the outlet is opened and closed by the floating rise and fall of the float arranged in the reservoir. In order to discharge the separated water outside the vessel, the float has a specific gravity smaller than that of water and larger than that of oil, and the float is placed in a free state in the reservoir so that it can freely move up and down. Open and close the outlet directly on the outer surface, and if the lower outer surface of the float and the outlet contact, either the lower outer surface of the float and the outlet contact part or both However, the elastic member is attached to one or both of the lower outer surface of the float and the abutment portion of the outlet so that it is elastically deformed, and the support seat is positioned at the lowered position of the lower outer surface of the float. Provide The upper end height of the seat is, oil-water separator, characterized in that arranged to be slightly lower than the upper end of the outlet.

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