JP2003175301A - Oil-water separation and drainage apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil-water separation and drainage apparatus capable of discharging water to a desired draining place without leaking an oil component to the outside even if one oil-water separation and drainage device is damaged. <P>SOLUTION: A first oil-water separation drainage device 1 is constituted so that a float 8 having specific gravity lower than that of water and higher than that of the oil component is provided in a container 3 having an oil-water inflow port 6 and a drain port 7 and the drain port 7 is opened and closed corresponding to the rising and falling of the float 8. A second oil-water separation and drainage device 2 is constituted so that a float 23 having specific gravity lower thin that of water and higher than that of the oil component, a changeover valve 24 and a drain valve 26 are provided in a container 22 having a hydraulic fluid introducing port 31, a working fluid discharge port 33, a water inflow port 36 and a drain port 37 and the drain port 37 is opened and closed by the drain valve 26 corresponding to the rising and falling of the float 23 and the opening and closing of the hydraulic fluid introducing port 31 and the working fluid discharge port 33 are changed over by the changeover valve 24 to drain the water stored in the container 22 to a desired draining place from the drain port 37. The water inflow port 36 of the second oil-water separation and drainage device 2 is connected to the drain port 37 of the first oil-water separation and drainage device 1. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil / water separation / drainage device capable of automatically separating water mixed in an oil storage tank or the like and discharging the water to a desired drainage point. . 2. Description of the Related Art Japanese Unexamined Utility Model Publication No. 3-83603 A conventional oil / water separation / drainage device is disclosed in, for example, Japanese Utility Model Application Laid-Open No. 3-8.
There is one disclosed in Japanese Patent Publication No. 3603. This is a system in which a partition wall is provided in an oil-water separation and drainage device, a hollow float having a specific gravity between oil and water is arranged, and a drain valve that opens and closes a drain port is connected to this float. The water separated from the wall can be discharged. When one oil-water separator / drainer is used as in the prior art, foreign matter such as dust or solidified solid matters is formed on the valve body and valve seat in the oil-water separator / drainer. There has been a problem that the leaked oil adheres or the contact portion between the valve body and the valve seat is damaged, and the oil leaks. Further, when the drainage point is remote, there is a problem that water cannot be sent to a desired drainage point and drained. Therefore, a technical problem of the present invention is to provide an oil / water separation / drainage device that can drain to a desired drainage point without leaking oil even if one oil / water separation / drainage unit is damaged. That is. [0004] Means for solving the above-mentioned problems according to the present invention have a specific gravity smaller than water and larger than oil in a container having an oil-water inlet and a drain. A first oil-water separation / drainage device that has a built-in float and opens and closes a drain port according to the rise and fall of the float, thereby draining water accumulated in the container from the drain port; a working fluid inlet and a working fluid outlet; A float having a specific gravity smaller than water and larger than oil content, a switching valve and a drain valve are built in a container having a water inlet and a drain port, and the drain port is opened and closed by the drain valve according to the rise and fall of the float, and the switching valve is used. A second oil / water separator / drainer for draining water accumulated in the container from a drain port to a desired drainage point by switching between opening and closing of a working fluid inlet port and a working fluid outlet port; An oil / water separation / drainage device, wherein a drain port of the drainage device is connected to a water inlet of a second oil / water separation / drainage device. DESCRIPTION OF THE PREFERRED EMBODIMENTS A mixed liquid of oil and water which has flowed into a container from an oil and water inlet of a first oil and water separator / drainer accumulates by separating water into a lower part and an oil part into an upper part due to a difference in specific gravity. . When the float rises with the rise of the water level and the drain port is opened, the water flows into the container from the water inlet of the second oil-water separator / drainer and accumulates. As the water level rises, the float floats, the drain valve opens the drain port, and the switching valve opens the working fluid inlet port and closes the working fluid outlet port.
A working fluid such as high-pressure steam, compressed air, or compressed nitrogen is introduced into the container through the opening of the working fluid introduction port, and water accumulated in the container is sent from a drain port to a desired drainage point and drained. When the water level in the container of the first oil / water separator / drainer is lowered by the drainage, the float descends and closes the drain at a predetermined water level. This prevents oil leakage. Similarly, when the water level in the container of the second oil / water separation / drainage unit is lowered by the drainage, the float descends, the drain valve closes the drain port at a predetermined water level, and the switching valve closes the working fluid inlet. Open the working fluid outlet. This prevents oil leakage. Even if the first oil-water separation and drainage device is damaged for some reason and leaks oil,
As long as the oil-water separator / drainer is not damaged, oil will not leak. An embodiment of the present invention will be described below. FIG. 1 is a sectional view of an oil-water separation and drainage device according to a specific embodiment of the present invention. In FIG. 1, a first oil / water separation / drainage device 1 and a second oil / water separation / drainage device 2 are arranged in series to constitute a steam / water separation / drainage device. [0008] The first oil-water separation and drainage device 1 comprises a main body 3 and a lid 4.
And a reservoir 5 for oil water is formed therein, and an oil water inlet 6 and a drain 7 are provided in the main body 3. The reservoir 5 communicates with the oil / water inlet 6, and a vertically long float 8 is disposed in a free space in the space. Float 8
Is a vertically long shape with a bottomed cylinder, and can move up and down along a plurality of guides 10, 11, 12, and 13 provided in the main body 3 so as to directly open and close the drain port 7 at the center of the outer surface of the lower end. Be placed. The float 8 is made of a stainless steel thin plate as a hollow float by pressing and welding, or made of a synthetic resin having a relatively small specific gravity such as polypropylene or polyethylene. The specific gravity of the float 8 is set to a value smaller than water and larger than oil, so that the float 8 floats in water but does not float in oil. The drain port 7 is formed through the center of the valve seat member 14 screwed to the main body 3. A stopper 15 is provided above the float 8, and support seats 16 and 17 for supporting the float 8 when the float 8 is lowered and seated on the valve seat member 14 are provided below. Body 3
A pressure equalizing pipe connecting the reservoir 5 to an oil storage tank or the like via a valve 18 and a reservoir 5 also via a valve 19.
Is connected to a blow pipe communicating the outside of the system. The second oil / water separator / drainer 2 has a container 23 in which a float 23, a switching valve 24, a snap mechanism 25, and a drain valve 26 are arranged. The container 22 includes a main body 27.
And the lid 28 are connected by screws (not shown), and a reservoir 30 is formed inside. The lid 28 is provided with a working fluid inlet 31, a working fluid outlet 33, a water inlet 36, and a drain 37. The water inlet 36 is located substantially at the center of the lid 28, and the drain 37 is provided at a position corresponding to the lower part of the container 22. An air supply valve 40 is mounted inside the working fluid inlet 31 and an exhaust valve 41 is installed inside the working fluid outlet 33.
Is attached. The air supply valve 40 includes a valve case 42, a valve body 43, and an elevating rod 44. The valve case 42 has a through hole in the axial direction, and an upper end surface of the through hole functions as a valve seat 45. The valve body 43 has a spherical shape and is integrally attached to an upper end of a lifting rod 44. The lifting rod 44 passes through the through hole of the valve case 42 to the container 22 side, and comes into contact with the connecting plate 47. The exhaust valve 41 includes a valve case 49, a valve body 50, and a lifting rod 51. The valve case 49 has a through hole in the axial direction, and a valve seat 52 is provided inside the through hole.
The valve body 50 held and fixed to the upper end of the elevating rod 51 from below the valve seat 52 abuts and opens and closes. The lower end of the lifting rod 51 is fixed to the valve shaft operating rod 48, and the connecting plate 47 is fixed to the valve shaft operating rod 48. The switching valve 24 is constituted by the air supply valve 40 and the exhaust valve 41. The exhaust valve 41 is closed when the air supply valve 40 is opened, and the exhaust valve 41 is opened when the air supply valve 40 is closed. The float 23 is manufactured as a hollow float by pressing and welding a stainless steel thin plate, or made of a synthetic resin having a relatively small specific gravity such as polypropylene or polyethylene. The specific gravity of the float 23 is set to a value smaller than water and larger than oil, so that the float 23 floats in water but does not float in oil. The float 23 is supported by a bracket 56 via a lever 54 and a shaft 55, and the snap mechanism 25
It is supported by a bracket 58 via a swing shaft 57. The bracket 56 and the bracket 58 are integrally attached to the lid 28 of the container 22 by screws (not shown). The lever 54 is formed by bending a plate into a U-shape, and two plates are opposed to each other in parallel. The float 23 is connected to the bent portion of the lever 54. A shaft 60 is attached to the other end of the lever 54. The bracket 56 is composed of two L-shaped plates when viewed from above, and includes the shafts 61 and 62 and the shaft 5 described above.
5 are bridged and connected. The shaft 55 also serves as a swing shaft of the float 23. The float 23 has a shaft 55
Swing up and down around the center. The shafts 61 and 62 also serve as upper and lower stoppers of the float 23, respectively. Similarly, the bracket 58 is formed of two L-shaped plates when viewed from above, and includes the shafts 63, 64, 65 and the swing shaft 5 described above.
7 are bridged and connected. The shaft 65 also serves as a stopper for the sub arm 72 described below. The snap mechanism 55 includes a main arm 71, a sub arm 72, a coil spring 74 in a compressed state, a spring receiver 75, and a spring receiver 76. The main arm 71 is composed of two plates opposing each other in parallel, a groove 77 is provided at the left end of the two plates, and the shaft 60 of the lever 54 is fitted. The right end of the main arm 71 is swingably supported by a swing shaft 57. The right end of the main arm 71 swells downward, and a first shaft 78 parallel to the swing shaft 57 is hung over the lower end thereof, and a spring receiver 75 is rotatably supported by the first shaft 78. The sub arm 72 is composed of two plates facing each other in parallel, and each plate has an inverted L-shape. A swing shaft 57 and a second shaft 79 parallel to the first shaft 78 are wound around the lower end of the sub arm 72, and the spring receiver 76 is
Is rotatably supported by a shaft 79. A coil spring 74 in a compressed state is attached between the spring receivers 75 and 76. A shaft 80 is wound around the upper left end of the sub arm 52, and the lower end of the valve shaft operating rod 58 is connected. The main arm 71 is provided with a window 73 so as not to hinder the movement of the shaft 80. A drain valve 26, which is a double-seat valve, is provided on the side of the reservoir 30 of the drain port 37. The drain valve 26 includes upper and lower valve cases 81 and 82, upper and lower valve bodies 83 and 84, and a drain valve shaft 8.
5. Upper valve case 81 and lower valve case 8
The upper valve case 81 is fixed by screws (not shown).
Are fixed to the lid 28 by screws (not shown). An upper valve seat 86 is formed in the upper valve case 81, and the lower valve case 8
2, a lower valve seat 87 is formed. An upper shaft portion of the upper valve body 83 is swingably connected to a drain valve shaft 85 by a shaft 88, and an upper end of the drain valve shaft 85 is swingably connected to the lever 54 by a shaft 89. The upper and lower valve bodies 83 and 84 are displaced downward in accordance with the floating of the float 23 to communicate with the reservoir 30 and the drain port 37, and displaced upward in accordance with the descent of the float 23 and are coupled with the reservoir 30 and the drain port 37. Cut off. A liquid level sensor 91 comprising an electrode rod 90 is mounted on the upper part of the reservoir 30. The liquid level sensor 91 can issue an alarm or the like when the reservoir 30 is filled with oil or water due to some problem and the liquid level reaches the upper end of the reservoir 30. When a person visually checks the liquid level in place of the liquid level sensor 91, it is possible to attach a transparent glass, though not shown, to check the liquid level. The drain port 7 of the first oil / water separator / drainer 1 and the second
The water inlet 36 of the oil / water separator / drainer 2 is connected by a connecting pipe 93. A check valve 92 that opens from the first oil / water separation / drainage unit 1 to the second oil / water separation / drainage unit 2 is interposed in the connection pipe 93. Next, the operation of the oil-water separation and drainage device of the present embodiment will be described. The oil water inlet 6 of the first oil / water separator / drainer 1 is connected to a water reservoir such as an oil storage tank. Also, the second
The working fluid inlet of the oil / water separator / drainer 2 is connected to a working fluid source such as high-pressure steam, compressed air, or compressed nitrogen, and the working fluid outlet 33 is connected to an upper opening such as an oil storage tank or to the atmosphere. The drain port 37 is opened and connected to a desired drain point via a check valve (not shown) that opens outward from the drain port 37. The mixed fluid of the oil and water that has flowed into the reservoir 5 from the oil water inlet 6 of the first oil / water separator / drainer 1 separates and accumulates water in the lower portion and oil in the upper portion due to the specific gravity difference. The water level is at the waterline of the float 8, usually 2 of the height of the float 8.
When the float 8 reaches the position of about ３, the float 8 floats up, separates from the valve seat member 14, and opens the drain port 7.
Water flows into the reservoir 30 from the water inlet 36 of the second oil / water separator / drainer 2 via the check valve 92 of the connection pipe 93 and accumulates. When the water level reaches the waterline of the float 23, usually about 程度 of the height of the float 23, the float 23 floats. As the float 23 floats, the lever 54 rotates clockwise about the shaft 55 to rotate the shaft 89.
Moves down. In conjunction with the downward movement of the shaft 89, the upper and lower valve bodies 83 and 84 move downward via the drain valve shaft 85 and separate from the upper and lower valve seats 86 and 87, and the reservoir 30 and the drain port 37 are moved. Communicate. When the lever 54 rotates clockwise, the shaft 60 moves downward. In conjunction with the downward movement of the shaft 60, the main arm 71 rotates counterclockwise about the swing shaft 57, and the first shaft 78 moves rightward to swing with the second shaft 79. When approaching the line connecting the moving shaft 57, the coil spring 74 is compressed and deformed. Then, when the float 23 further floats and the first shaft 78 moves to the right side of the line connecting the second shaft 79 and the swing shaft 57, the coil spring 74 rapidly recovers from the deformation, and the sub arm 72 moves clockwise. The second shaft 79 snaps to the left by rotating in the circumferential direction. As a result, the valve shaft operating rod 48 connected to the shaft 80 of the sub arm 72 moves upward, the air supply valve 40 opens the working fluid inlet 31, and the exhaust valve 41 closes the working fluid outlet 33. When the working fluid inlet 31 is opened, a high-pressure working fluid is introduced into the container 22, the internal pressure increases, and water accumulated in the reservoir 30 is discharged from the drain 37 through a check valve (not shown). To the outside of the desired drainage point. When the water level in the reservoir 5 of the first oil / water separator / drainer 1 decreases due to drainage, the float 8 descends and sits on the valve seat 14 at a predetermined water level. Prevent leaks. 2nd oil-water separation drainage by drainage 2
When the water level in the reservoir 30 decreases, the float 23 descends, the lever 54 rotates counterclockwise about the shaft 55, and the shaft 89 moves upward. In conjunction with the upward movement of the shaft 89, the upper and lower valve bodies 83, 84 via the drain valve shaft 85.
Is moved upward and seated on the upper and lower valve seats 86, 87, and the reservoir 3
0 and the drain 37 are shut off. When the lever 54 rotates counterclockwise, the shaft 60 moves upward. In conjunction with the upward movement of the shaft 60, the main arm 71
7, the first shaft 78 moves to the left and approaches the line connecting the second shaft 79 and the swing shaft 57, and the coil spring 74 is compressed and deformed. And float 2
When the first shaft 78 moves further to the left than the line connecting the second shaft 79 and the swing shaft 57, the coil spring 74 is moved.
Quickly recovers from the deformation, the sub arm 72 rotates counterclockwise, and the second shaft 79 snaps to the right. As a result, the valve shaft operating rod 48 connected to the shaft 80 of the sub arm 72 moves downward, and the air supply valve 40 moves to the working fluid inlet 31.
And the exhaust valve 41 opens the working fluid discharge port 33. The first oil / water separator / drainer 1 for some reason
Oil leaks from the drain port 7 of the second oil-water separation drainage device 2
When the float 23 flows down into the reservoir 30, the float 23 does not float in the oil, so the drain valve 26 remains closed and the oil does not leak. When the oil level further accumulates in the reservoir section 30 and the liquid level reaches the electrode rod 90, the liquid level sensor 91 detects the oil level and issues an alarm or the like. The oil / water separator according to the present invention has a structure in which a water inlet of a second oil / water separator / drainer for draining with a high-pressure working fluid is connected to a drain of a first oil / water separator / drainer. Therefore, even if the first oil / water separation / drainage device is damaged for some reason and the oil leaks, the second oil / water separation / drainage device can prevent the oil from leaking, and the drainage can be performed at a desired drainage point. It produces an excellent effect of being able to

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an embodiment of an oil-water separation and drainage device of the present invention. [Description of Signs] 1 First oil / water separator / drainer 2 Second oil / water separator / drainer 3 Main body 4 Lid 6 Oil water inlet 7 Drain port 8 Float 22 Container 23 Float 24 Switching valve 25 Snap mechanism 26 Drain valve 27 Main body 28 Lid 31 Working fluid inlet 33 Working fluid outlet 36 Water inlet 37 Drain 40 Air supply valve 41 Exhaust valve

Claims (1)

Claims: 1. A float having a specific gravity smaller than water and larger than an oil content is incorporated in a container having an oil-water inlet and a drain, and the drain is opened and closed according to the rise and fall of the float. A first oil-water separator / drainer for draining water accumulated in a container from a drain port, and a container having a working fluid introduction port, a working fluid discharge port, a water inlet, and a drain port smaller than water and smaller than oil. A float having a large specific gravity, a switching valve and a drain valve are built in, and the drain is opened and closed by the drain valve according to the rise and fall of the float, and the switching of the working fluid introduction port and the working fluid outlet is switched by the switching valve, so that the container is opened. A second oil / water separator / drainer for draining water accumulated in the water from a drain port to a desired drainage point, and connecting a drain port of the first oil / water separator / drainer to a water inlet of the second oil / water separator / drainer. did Oil-water separator effluent and wherein a and.