DE102006033524A1 - System protecting e.g. oil tanks from flotation by high water, comprises one-way filling valve at base of tank and vent valve high on tank - Google Patents

Abstract

A filling valve (14) is fitted to the storage tank (2). Should the water level rise in the space where the tank is installed, this opens, but at the same time will not permit efflux from the tank. At the highest point on the tank, an automatic vent valve (15) is fitted. The filling valve is below the tank, or in the lower part of the tank. It is a non-return valve or flap, which opens on a low pressure differential, and which may operated by a sensor and controller. An independent claim is included for the corresponding method.

Description

security system for closed storage containers especially for water pollutant Substances such. B. fuel oil tanks and method for securing storage containers against flooding.

Devices for securing containers with water polluting substances, in particular oil tanks are known in various designs. Against leaks, various drip pans are provided. To protect against flooding, oil tanks are protected, for example, with straps or weights against buoyancy and thus bursting of the pipes. Apart from the vent line, the lines are usually part of closed systems and thus, as long as the lines do not burst, they are safe against unintended discharge or ingress of substances. All security devices are ineffective in the event that the container detaches from the anchorage and burst the lines. In addition, the vent line, which may not be designed to be shut off, unprotected. In the DE 102 44 380 is proposed as a further possibility of protection and as a security system, the use of so-called source curtains consisting of a support material and applied thereon source material or water-absorbing materials. These materials are especially placed under the tank facilities and should at least reduce the pressure loads on flooding of the tanks.

Of the Invention is based on the object, a security system and a Procedures to create that secure the unwanted intrusion and escape of substances in or out of containers as a result of increased Water level prevented. The function should be both in case of bursting guaranteed by connecting lines as well as with open vent lines be. At the same time it should be possible be that by controlled inflow of a liquid, preferably water, in the container the floating of the same is prevented.

The Security system for closed storage containers especially for water pollutant substances is characterized by the fact that a sensor has an increased water level registered in the installation room and as a result in the connection lines of the storage container arranged control valves safely closes. The sensor can be used as a float executed the Use buoyancy as the water level rises and over mechanical Connections close the valve or cock or as an electrical sensor indirectly control an electric control valve or via an electrical control unit. This can ensure that it is at high water, pipe burst etc. in the installation room or outside rising water level not for unwanted intrusion or outflow in or out of the storage container to lead can. Thus, a threat to the Environment by e.g. oil or other dangerous substances safely prevented. On the other hand, contamination of the Storage container contents by penetrating liquids locked out. Even with a bursting of the connecting lines is the system is safe.

advantageous embodiments of the security system for closed storage containers especially for water pollutant Substances result from the subclaims 2 to 8.

at The development according to claim 2 is the valve in the lower area of the container arranged. This allows the water to flow in when the level in the Installation room is located above the lowest point of the storage container. Thus, the floating of an empty or almost empty container prevented become.

at the development according to claim 3 is a filling valve as a check valve, or a non-return valve provided, which opens at low pressure difference. This check valve allows the flow only in one direction - in the storage container inside.

One low required differential pressure between the pressure in the container and allowed in the installation room the opening the check valve at slightly higher Water level in the installation room, based on the liquid level in the tank.

The Training according to claim 4 provides the registration of the water level through a sensor that connects the filling valve directly or via a control unit actuated. Thus, as in claim 12 electronic-electrical solutions are included.

According to the training according to claim 5, the filling of the storage container if necessary by opening the filling valve, arranged in a pipe connected to a water pipe is possible. The closing the valve is made by registering the filling of the storage container by a Level sensor. Through this training is mainly prevented by polluted water the whole Shut down the filling valve is impaired. Thus, the leakage of the storage container with decreasing water level Safely prevented in the installation room.

The development according to claim 6 provides for the arrangement of a filling pump with suction line on the storage container. As a result, the storage container can be filled when an inadmissible water level detected by the sensor occurs, and thus the Floating the storage container to be counteracted. The final shutdown of the filling pump is carried out by the level sensor.

at The development according to claim 7, the sensors for detection the water level and the level height in the storage tank pressure sensors. By means of these sensors leaves There is a pressure difference between the storage container interior and the environment outside of the storage container determine and thus the further steps of filling the storage container with z. B. introduce water, if a corresponding pressure difference was determined. This will increase the buoyancy of an empty or not full storage container eliminated.

The The invention will be explained in more detail with reference to the drawing.

It demonstrate:

1 the schematic representation of a controlled filling of the storage container with a filling and a vent valve,

2 the schematic diagram of a controlled filling device by connection to a water pipe and

3 the schematic diagram of a filling with filling.

Flooding or otherwise at the site of the storage container 2 occurring water leaks and a threat of loss of stability is recommended filling the storage container 2 with water. This is done in the lower part of the storage container 2 a filling valve 14 , Preferably as a responsive to a small pressure difference non-return valve 14 arranged. A hydrostatic pressure difference results from the different water level and the density difference between the contents of the storage container 2 and the water level in the installation room. At higher hydrostatic pressure outside the storage tank 2 opens the filling valve 14 and gives the inlet of water into the storage container 2 free. This approaching the level in the storage container 2 outside the storage container 2 at. Supporting here acts one at the highest point of the storage container 2 lying automatic vent valve 15 , At lower hydrostatic pressure outside the storage tank 2 closes the filling valve 14 or remains closed.

Instead of the inlet from the environment can be connected to a water pipe 16 the inlet from the water pipe done. For this purpose, a corresponding arrangement of sensors, for. B. a pressure sensor or a liquid sensor 14 , And a control device for controlling the opening or the closing of the filling valve 14 intended. For this purpose, z. B. in the water pipe 16 a filling valve arranged therein 14 through the liquid sensor 4 be controlled and by one in the upper part of the storage container 2 arranged level sensor 17 be switched off.

The filling valve 14 and the vent valve 15 can be coupled electrically directly or via the adjusting device.

In addition to or instead of the filling valve 14 is a filling pump 18 including suction line 19 with the storage container ( 2 ), wherein the filling pump 18 through the appropriately arranged liquid sensor 4 and the level sensor 17 is controllable.

All Valves can Naturally also be operated electrically and are here preferably with connected to an adjusting device.

The procedure for avoiding the tearing out of incompletely filled storage containers 2 from their anchorages at high water is by the determination of the different liquid levels inside and outside the storage container 2 or characterized by the determination of a pressure difference. By one or more spaced-apart sensors 4 that detect the high water level and by level sensors 17 that the fluid level inside the storage container 2 determine, is made by a control / control circuit, a Iststandsvergleich the different liquid levels and at a predetermined excess of the high water level on the liquid level within the storage container 2 becomes a filling valve 14 opened and thus the storage container 2 filled with liquid until at least the liquid level within the storage container 2 the same state as the flood has reached. Subsequently, the filling valve 14 closed again.

The sensors 4 and 17 can also be pressure sensors in this case.

2

storage containers

4

Sensor, swimmer

5

liquid level

14

Filling valve, Check valve, -flap

15

vent valve

16

water pipe

17

level sensor

18

filling pump

19

suction

Claims (9)

Security system against flooding for closed storage containers, in particular for water-polluting substances, against the tearing out of the storage containers from their anchorages, characterized in that the storage container ( 2 ) a filling valve ( 14 ) is mounted, which opens with increasing water level in the installation room and at the same time a flow from the storage container ( 2 ) and at the highest point of the storage container ( 2 ) an automatic bleed valve ( 15 ) is attached. Closed storage container securing system according to claim 1, characterized in that the filling valve ( 14 ) below or in the lower part of the storage container ( 2 ) is arranged. Closed storage container securing system according to one of the preceding claims, characterized in that the filling valve ( 14 ) is a check valve or a check valve which opens at a low pressure difference. Closed storage container securing system according to claims 1 and 2, characterized in that the filling valve ( 14 ) through the liquid sensor ( 4 ) is controllable via an actuating device. Closed storage container securing system according to claim 1, 2 and 4, characterized in that the filling valve ( 14 ) and the vent valve 15 ) are electrically coupled directly or via the adjusting device. Closed storage container securing system according to claims 1, 2, 4 and 5, characterized in that the storage container ( 2 ) with a water pipe ( 16 ) is connected and arranged therein filling valve ( 14 ) through the liquid sensor ( 4 ) is controllable and by one in the upper region of the storage container ( 2 ) arranged level sensor ( 17 ) can be switched off. Closed storage container securing system according to claim 1, 2 and 4 to 6, characterized in that in addition to or instead of the filling valve ( 14 ) a filling pump ( 18 ) including suction line ( 19 ) with the storage container ( 2 ), wherein the filling pump ( 18 ) by the correspondingly arranged liquid sensor ( 4 ) and the level sensor ( 17 ) is controllable. Closed storage container securing system according to claims 1, 2 and 4 to 7, characterized in that the sensors ( 4 ) and ( 17 ) Pressure sensors are. Method for securing against flooding of closed storage containers, in particular for water-polluting substances, against the tearing out of the storage containers from their anchorages, characterized in that by sensors ( 4 ) the high water level and by level sensors ( 17 ) the liquid level within the storage containers ( 2 ) is determined and in a control / control circuit, a Iststandsvergleich takes place and at a predetermined excess of the high water level on the liquid level within the storage container ( 2 ) a filling valve ( 14 ) is opened and thus the storage container ( 2 ) is filled with liquid until at least the liquid level within the storage container ( 2 ) has reached the same level as the flood and then the filling valve ( 14 ) is closed again.