JPH0649874U - Oil stopper device for oil levee - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a device that can sufficiently fulfill the role of an oil barrier for an aboveground tank. [Structure] An oil stop plug device B provided inside or outside of an oil levee 1 installed so as to surround an aboveground tank A, which floats against water by utilizing a difference in specific gravity between water and oil. It is characterized in that it is composed of a float 13 that descends with respect to oil, and a valve body 9 that opens and closes the outflow pipe line 5 in conjunction with the rise and fall of the float 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an oil stopper device equipped on an oil barrier of a ground tank to stop oil and drain water.

[0002]

[Prior art]

 In order to prevent accidents due to oil spills, the ground tanks (including home tanks) that contain kerosene, light oil, heavy oil, etc. should be compared with the capacity of the ground tanks in order to prevent accidents due to oil spills. The Fire Defense Law stipulates the construction of a concrete dike with a capacity of 110%. By the way, since the above-ground tanks are installed outdoors, rainwater will collect during rainfall, and if an oil leak occurs when the rainwater is accumulated, oil will leak out over the dike. Therefore, the function as an oil barrier will not be exerted.

Therefore, a drain valve is provided in order to drain the rainwater accumulated on the oil barrier, and the valve is closed at all times. When the rainwater accumulates on the oil barrier or when it rains, the valve is opened. It is designed to be drained.

[0004]

[Problems to be solved by the device]

 However, as mentioned above, if an oil leak occurs at the time of rainfall or when the drain valve is opened to drain the accumulated rainwater, the dike will be useless, and will be almost nothing. The drainage valve is actually left "open" in ordinary households due to the inconvenience of operations such as closing and opening depending on the above-mentioned situation. Moreover, when there was an inspection by the fire department, the drain valve was closed, and it was reported that the rainwater accumulated inside the oil barrier was drained by operating the valve each time. It is in a state that is almost equal to the existence. As a result, an oil spill accident due to the "open" drain valve on the dike has actually occurred.

The present invention has been made in view of the problems of the above-described conventional techniques, and an object of the present invention is to provide a device that can sufficiently serve as an oil barrier of an aboveground tank. It is provided.

[0006]

[Means for Solving the Problems]

 The technical means taken by the present invention to achieve the above-mentioned object is an oil stopper device provided inside or outside of an oil barrier, which is installed so as to surround an aboveground tank. It is composed of a float that floats against water and descends against oil by utilizing the difference in specific gravity, and a valve body that opens and closes the outflow conduit in conjunction with the rise and fall of the float. To do. The float is set to be the same as the specific gravity of water or smaller (lighter) than water and larger (heavyer) than the specific gravity of oil.

In the above apparatus, the mechanism for interlocking the valve element with the vertical movement of the float includes a direct type in which the float and the valve element are arranged in a vertical straight line and the two are directly connected by a connecting rod, or a vertical movement and valve movement of the float. An example is a balance type in which the vertical movements of the body are reversed. Furthermore, the device is installed in a box into which water and oil flow, and a collecting box for collecting water and oil is placed on the upstream side where water and oil flow, and a rainwater and oil inlet is equipped with Attach a wire mesh etc. to prevent the inflow of Mi. In addition, a storage box is arranged on the downstream side of the device to communicate with the side groove.

[0008]

[Action]

 According to the above measures, when rainwater collects rainwater in the dike and flows into the box equipped with this device, the float is set to have a specific gravity equal to or less than the specific gravity of the water. The float rises as the water level rises due to the inflow of rainwater, which causes the valve body that closed the outflow pipe to rise, the outflow pipe is opened, and rainwater is guided and drained along the pipe. Also, if oil leaks and accumulates in the oil barrier when the aboveground tank is damaged and the oil flows into the box of the equipment, the float is set to be heavier than the specific gravity of the oil. As the oil drops, the valve also drops, closing the outflow pipe, stopping the oil from flowing out, and storing the oil leaking from the tank in the oil barrier.

Further, when the float rises due to the inflow of rainwater and the oil leaks when the valve body rises and the outflow pipe is open, the specific gravity of oil is small relative to the specific gravity of water. The oil floats on the rainwater, the float floats on the rainwater and the rainwater continues to be drained, and when the rain stops and the amount of rainwater does not reach the level that floats the float, the float descends by its own weight and the valve body Also descends and closes the spill line to prevent oil spills. When the interlocking mechanism between the float and the valve body is a balance type, the valve body lowers and opens when the float rises, and the valve body rises and closes when the float lowers. It will be.

[0010]

[Effect of device]

 INDUSTRIAL APPLICABILITY As described in detail above, the oil stopper device for an oil barrier according to the present invention is an oil stopper device provided inside or outside of an oil barrier installed so as to surround an aboveground tank. It is composed of a float that floats up against water and descends against oil, and a valve body that opens and closes the outflow pipe in conjunction with the rise and fall of the float by utilizing the difference in specific gravity of Therefore, the water accumulated in the oil barrier due to rainfall is drained by the operation of the oil stop device, and in the unlikely event that oil leaks from the tank, the float is heavier than the specific gravity of oil and set equal to or less than the specific gravity of water. Therefore, the oil will fall by its own weight against the inflow of oil, the valve body will also drop, and the outflow pipe line will be closed to reliably prevent the oil from flowing out of the dike.

Moreover, since the above oil stopper device automatically raises and lowers the float by utilizing the difference in specific gravity of oil and water, the valve can be manually opened and closed like a conventional drainage valve. There is no need to do it, it is very convenient. Therefore, the original role of the dike can be surely achieved, and it can contribute to the prevention of oil spill accidents.

[0012]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings with respect to a direct type interlocking mechanism between a float and a valve body. 1 and 2 show an embodiment in which the device of the present invention is installed in an oil barrier, in which 1 is a concrete oil barrier arranged so as to surround the aboveground tank A. Install the oil stop device B inside the device, and let rainwater or oil flow into the device B. Install a collecting basin 2 for collecting water and mud on the upstream side and connect both with the inflow pipe 3 A reservoir 4 is arranged on the downstream side of the oil stopper device B and on the outer side of the oil barrier 1, the oil stopper device B and the reservoir 4 are connected by an outflow pipe 5, and the outflow in the reservoir 4 A valve 6 is provided at the end of the pipe 5, and the sump 4 is connected to a gutter (not shown) so as to drain rainwater.

The oil stopper device B is housed and installed in a box body 7 for housing and arranging the outlet side of the inflow pipe 3 and the inlet side of the outflow pipe 5, and the device has a cross section in a pipe line near the inlet side of the outflow pipe 5. A valve seat 8 having a substantially conical shape is attached, and a valve body 9 that is inserted into or removed from the valve seat 8 is provided, and the valve body 9 is erected and fixed in the outflow pipe 5 in a valve case 10. The connecting rod 11 is housed and fixed on the upper surface of the valve body 9, and is inserted into the guide cylinder 12 attached to the valve case 10. The float 13 is attached to the tip of the connecting rod 11 protruding from the guide cylinder 12. It is included.

The float 13 is set to have the same specific gravity as water or smaller (lighter) than water and larger (heavier) than specific gravity of oil, so that water (rainwater) flows into the box body 7. In this case, the float 13 floats, and when oil flows into the box 7, the float 13 descends by its own weight. Therefore, the valve body 9 moves up and down in conjunction with the vertical movement of the float 13, and the conduit of the outflow pipe 5 is opened and shut off (see FIG. 2).

3 and 4 show an embodiment in which the device of the present invention is installed outside the oil levee, in which a reservoir 14 is arranged inside the oil levee 1 and a book is provided outside the oil levee 1. A box body 15 for accommodating the device and a storage box 16 are arranged, an inflow pipe 17 is piped between the storage box 14 and the box body 15, and a wire mesh is provided at an inlet portion of the inflow pipe 17 in the storage box 14. It is attached to prevent dust and mud from flowing into the inflow pipe, and an auxiliary valve 18 is attached in the middle of the inflow pipe 17 so as to cope with a failure of the device.

A valve seat 19, a valve body 20, a valve case 21, a connecting rod similar to those shown in the previous embodiment are provided at the outlet of the inflow pipe 17 in the box body 15 arranged outside the oil barrier 1. An oil stop plug device B'composed of 22, a guide cylinder 23 and a float 24 is attached, and an outflow pipe 25 is piped between the box body 15 and the sump 16 and the sump 16 is shown in the drawing. It is constructed so that rainwater can be drained by connecting to the omitted gutters. The inlet side of the outflow pipe 25 located inside the box body 15 is located on the bottom side of the box body 15, and the top surface of the box body 15 is covered with a cover such as a wire mesh so that rainwater is stored when it rains. As a result, the float 24 rises and the valve body 20 provided in the inflow pipe 17 is opened, the conduit of the inflow pipe 17 is opened, and the rainwater accumulated in the oil barrier 1 passes through the inflow pipe 17. It is drained to the box 15. The auxiliary valve 18 should always be open and should be closed only when the oil stopper device B'is not operating due to a failure or the like.

In the above-mentioned embodiment, until the rainwater collects in the box body 15 and the float 24 floats, the valve body 20 is fitted to the valve seat 19 by the weight of the float 24 and the inflow pipe 17 is closed. Close. Therefore, even if there is an oil leak under that condition, the outlet side of the inflow pipe 17 that connects the inside and outside of the oil barrier 1 is closed, so the oil leaking from the aboveground tank is stored in the oil barrier 1, It does not flow out of the oil barrier 1.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment in which an oil stopper device is installed inside an oil barrier.

FIG. 2 is an enlarged cross-sectional view of the oil stopper device portion (a portion surrounded by a dashed line) shown in FIG. 1, (a) showing a closed state and (b) showing an opened state.

FIG. 3 is a system diagram showing an embodiment in which an oil stopper device is provided on the outside of an oil barrier.

4A and 4B are enlarged cross-sectional views of the oil stopper device portion (the portion surrounded by the alternate long and short dash line) shown in FIG. 3, in which (a) is a closed state and (b) is an open state.

[Explanation of symbols]

 1 ... Oil barrier 5 ... Outflow pipe 17 ... Inflow pipe 9,20 ... Valve body 13, 24 ... Float A ... Ground tank B, B '... Oil stopper device

Claims (1)

[Scope of utility model registration request] 1. An oil stop plug device provided inside or outside of an oil barrier, which is installed so as to surround an aboveground tank,
A float that floats up against water and descends against oil by utilizing the difference in specific gravity between water and oil, and a valve body that opens and closes the outflow pipe or inflow pipe in conjunction with the rise and fall of the float. An oil stopper device for an oil barrier, which is characterized in that