RU1836284C - Appliance for catching of inflammable liquidsъ leakage from a feeding pipe - Google Patents

Abstract

By means of a spillage-retaining device in the vicinity of a filling pipe which is arranged in a domed shaft and opens out through a domed lid into an underground storage container for fuels, heating oils or the like, a solution is to be provided which virtually completely prevents any spillage damage when a filling hose connected to the filling pipe becomes detached. This is achieved in that a flexible retaining bag (13), which surrounds the filling pipe (4) in a fluid-tight manner and is resistant to the spilt liquids, is arranged between the domed lid (3) and the shaft lid (12) which is situated above it and terminates the domed shaft (10). <IMAGE>

Description

00

SA О GO 00 4

00

The invention relates to a device for collecting liquid leaks in an area of a filler pipe located in a well which, through a manhole cover, enters an underground reservoir for storing fuel, fuel oil or similar liquids, wherein a liquid-tight enclosure is located between the manhole cover and the overlying well cover above it. the bulk pipe is an elastic and resistant to the specified liquid trapping bag.

The object of the invention is to provide such a solution, which almost completely eliminates damage of the above kind.

In a device of the type described above, this is carried out according to the invention due to the fact that the upper edge of the catching bag is arranged in a circle at a distance from the side walls of the well, then the catching bag is provided with a lid that is resistant to leaky liquid, and finally, in the lowermost part of the catching bag outlet that enters the filler pipe above the manhole cover.

This arrangement ensures that when the storage tank is filled, the inevitably remaining amount of liquid in the hose is automatically drained into the tank, due to which, on the one hand, this residue is not lost, and on the other hand, it cannot pollute the environment. At the same time, it is guaranteed that contaminated or rain water or other unavoidable contaminants in the area of the tank can be collected unhindered and without causing any harm to the contents of the tank, in particular through the intermediate cavity between the side walls of the well and the sealed collecting bag and can be discharged into land, without causing significant pollution there. Even if the polluted water contains substances that are harmful to the environment, for example, oil residues suspended in water or the like. substances, the solution according to the invention allows you to open the lower end of the well and from time to time to introduce a disinfectant, such as bacterial cultures or the like. substances, as a result of which even areas with containers in operation without the protective device according to the invention, which have been heavily contaminated for a long time, can be quickly cleaned after installation. The lid, located directly on the tank in addition to the manhole cover, reliably prevents the ingress of condensation water, rust particles, etc. on the underside of the manhole cover to the tank, which otherwise would prevent the remaining water in the hose from being drained into the liquid tank itself.

Compared with known devices with a well closed at the lower end, the device according to the invention has the main advantage in that by separating the well itself with the top cover, which accepts vertical loads, and the trapping device itself, into the filling pipe. vertical forces are transmitted, which are associated with the danger of deformation or cracking, which can become a source of environmental pollution in these places.

According to an improvement of the invention, the arrangement on the upper edge of the catching bag of telescopic vertical rods fixed to the manhole cover is very advantageous, because it is especially easy to equip those already in place with them. operation of tanks in accordance with the invention.

The discharge at the lower end of the catch bag can be in the form of a bypass with a check valve so that the tank is gas-tight due to the check valve.

Further, it is particularly preferable if a limit level sensor is installed in the catch bag so that the fluid supply with the hose connected to the filler pipe is stopped when the set level in the catch bag is reached. Due to this, it is always ensured that the supply of a large amount of liquid, i.e. one that exceeds the capture volume will not occur even if, for example, automatic drainage is interrupted due to obstruction of the outlet or a malfunction of the valve installed in it, or if service personnel do not shut off the fluid supply through the filling hose in time.

It is advisable to connect a limit level sensor located in the trap bag in parallel to the limit level sensor, which interrupts the fluid supply when a predetermined filling level is reached in the storage tank.

Further, it is recommended that the tube for measuring the level of liquid be positioned in the same way as the filling pipe inside the catch bag and that it is sealed, since you dreamed that in the level measuring tube with the control rod vertically located in it, it can do exactly the same when moving it fluid flowing in the reservoir through the upper edge of the tube to measure the level.

It is further preferred that the upper ends of the inlet pipe and the liquid level monitoring pipe end below the upper edge of the catch bag, whereby when the hose is disconnected from the inlet pipe, no liquid can enter the well through the upper edge of the catch bag.

Further, the upper edge of the catching bag can be located on hook-like movable supports so that the catching bag can move upward and thereby free up space above the hatch for inspection and maintenance.

Finally, it is advisable to provide a trap bag that is stable on its inside to the specified fluid, internally or externally laid with a reinforcing fabric such as fiberglass.

Figure 1 shows a vertical section of a catch bag according to the invention located in a well; in Fig. 2 is a top view of the device of Fig. 1, in Fig. 3 is a vertical section similar to the vertical section in Fig. 1, vertical rods mounted on the lid of the tank hatch and used to install a catch bag.

In the illustrated embodiments, FIGS. 1 and 2 show underground fuel tanks 1 with two walls, equipped with a hatch 2, which is closed by a cover 3. A filler pipe 4 and a pipe for measuring the level of liquid 5 equipped with a mechanical measuring rail, as well as a sensor 6 of the maximum liquid level. To the manhole cover, in addition, a fuel line 7 connected to a gas station, a line for exhausting air 8 and a so-called gas balancer 9 are connected.

Above the hatch of the reservoir 2 there is a well 10 (brick or concrete) with a shaft frame 11 and a well cover 12 located therein, the upper edge of which corresponds to the level of the earth's surface.

All pipelines, except for bulk pipe 4 and measuring tube

the liquid level 5, connected to the manhole cover 3, horizontally pass above the manhole cover at a low height, so that free space is created between the manhole cover 3 and the manhole cover 2 to the filler pipe 4 and the liquid level control pipe 5, in which there is a flexible trapping bag 13, resistant to liquid entering it. The bag is equipped with bellows cuffs 14 and 15, with reinforced edges of the holes and the corresponding mounting bracket 16 or a similar clip snug against the filling pipe 4 and the pipe for monitoring the level of the liquid 5, as is clearly seen in figure 1.

The catcher bag 13, which is open at the top, has a fastening edge 17 made of a metal ring pressed into the material of the catcher bag as a strip, the preferred option, or in loops on the bag, and is suspended on hooked, movable supports 18, which are open from above, the sides are fixed to the walls of the well. As Figure 2j shows, the horizontal projection of the shaft of the well 10 with the shaft frame 11 is a square section, while the horizontal projection of the bag 13 is circular in shape, with the bag positioned so that between the shaft frame 11 and the upper mounting edge 17 of the bag 13 there is a sufficient distance so that water or water seeping from the edge of the shaft frame 11 of rain or snow does not enter the trap bag, and can leak through the gap between them and the walls of the well shaft into the soil. It can also be seen from Fig. 1 that the upper ends of the filler pipe 4 and the liquid level control tube 5 are slightly lower than the upper edge 17 of the catch bag 13.

In addition, a limit level sensor 27 is installed in the capture bag 13, which is connected parallel to the first level sensor 6, so that when the predetermined level is reached, the overflow of the capture bag 13 is prevented, especially if the overflow of the bag will be associated with leaks in the connection between the bulk pipe 4 and the charging hose connected to it.

Further, the capture bag 13 is equipped with a cover 26 to protect against pollution or the ingress of rainwater, which, if there is no cover 26, can enter the capture bag through

the holes in the well cover 12. This also applies to condensation moisture and rust particles on the underside of the manhole cover 12. The outlet at the lowest point of the capture bag 13 is in the form of a bypass 20 with a check valve 21 such that leakage fluid from the capture bag 13 will be continuously supplied to the underground reservoir 1 simultaneously with the main fluid.

In the example of FIG. 3, the supports 18 are located at the upper ends of the telescopic vertical rods 29 and have the ability to swap along the sides and in height; the lower ends of the rods are fastened to the manhole cover 3 by means of fixing bolts 30. This eliminates the need for fixing on the side walls of the well or additional equipment of tanks already in operation with the device according to the invention.

The principle of operation of the above device is as follows.

To fill the tank with fuel 1, the inlet hose of the vehicle is connected to the filler pipe 4 using a special coupling half and the fuel enters the tank 1 until the level sensor b interrupts the fuel supply. After this, the clutch between the filling hose and the filling pipe is released and the inevitable residual liquid, so-called leaks, is trapped in the bag 13, so that practically no liquid can enter the well 10 and the soil through the upper edge 17 of the catch bag 13. The catch bag 13 also acts similarly when a mechanical measuring rod is pulled out or inserted into the tube for measuring the liquid level 5 when, depending on the level of the tank, it often happens that the liquid is ejected through the upper edge of the tube to control the liquid level 5. This so-called leakage liquid is collected in the lower part of the catching bag 13 and continuously flows out of it through the bypass outlet 20 directly into the container 1. It is further seen that the liquid being poured cannot overflow of the upper mounting edge 17 of the collecting bag, since the upper ends of the inlet pipes and for controlling the liquid level situated below the fastening edge 17.

As Figure 2 shows, the tubes for the limit level sensor 6 and the gas balancer 9 are designed so that after removing the cover of the well 12, the corresponding devices located in the corners of the shaft frame are well accessible.

The presented and described design of the capture bag 13 allows without disconnecting the sealing

cuffs 16 from the bulk pipe and tube for

check the liquid level a little while, pick up the catching bag and put

sideways so that the well 10 will be well accessible for inspection and / or repair work.

The bag for collecting liquid 13 is made of material that is resistant to the incoming liquid, integral with the sealing cuffs extending from the bottom is very simple using conventional techniques, as, for example, has been done for a long time with hydraulic sealing of cable entries of several cables in cable boxes and , for example, it is known from the patent of Germany 2655548.

The embodiment described above can be modified in various ways without affecting the basic principles of the invention. Thus, for example, a collecting bag in a horizontal section may have a different, not necessarily round, shape. Correspondingly to the rectangular shape of the shaft of the well, the bag may have an oval shape or another similar shape.

Of course, the inventive catch bag along with the underground reservoir is not only suitable for combustible liquids and fuel oil, but also

for all other fluids, if it is necessary to prevent their penetration into the soil,

Claims (10)

1. A device for collecting leakage of fuels and lubricants from bulk a pipe containing a well with a lid, a filling pipe mounted therein, in communication with an underground reservoir having a filler neck with a lid for storage of fuels and lubricants and located between the lid of the well and the filler neck, a capture bag made of a material elastic and resistant to the liquid, characterized in that the upper edge of the capture bag is circumferentially fixed with a gap relative to the well and has a lid that is resistant to the liquid being poured, and in the lower part there is an outlet bag a nozzle that enters the filler pipe above the filler cap. 2, The device according to claim 1, with the exception that the upper edge of the catching bag is mounted on vertical rods, telescopically mounted on the filler cap. 3. The device according to claims 1 and 2, with the exception that the outlet pipe is made in the form of a bypass with a check valve. 4. A device according to claims 1 to 3, characterized in that it is equipped with a limit level sensor mounted in the catching bag, which is set so that upon reaching a predetermined level of filling the bag, the flow of liquid through the inlet hose connected to the inlet pipe is interrupted. 5. The device according to claim 4, characterized in that a limit level sensor is installed on the filler cap to shut off the fluid supply to the reservoir connected to the limit level sensor installed in the catch bag. 6. The device according to claims 1-5, characterized in that it is equipped with a tube for monitoring the liquid level, mounted 18 26 17 12 Noah c. the catching bag is similar to a bulk pipe. 7. The device according to claims 1 to 6, characterized in that the upper ends of the bulk fluid control tubes and tubes are located below the upper edge of the catch bag. 8. The device according to claims 1 to 7, characterized in that the upper edge of the catching the bag is mounted on hook-shaped supports mounted vertically to lift the bag. 9. A device according to claims 1 to 8, characterized in that the catching bag is provided with a reinforcing fabric located inside or outside. 10. The device according to claim 9, characterized in that the reinforcing fabric is made of fiberglass. Priority on points: 05/31/90 according to claims 1-5; 08.16.90 according to claims 6-10. eleven thirteen FIG. f -10