DE2448290A1 - FILLING SECURITY - Google Patents

Description

ing RALF MINETTI

PATENT ADVOCATE
2 HAMBURG 1
Balllndamm 15

Telephone: 33 51 15

My files: 5848/74

FRAME S.A.

2, rue St. Pierre

1700 - Friborg (Switzerland)

FILLING SAFETY

The invention relates to an overfill protection for storage containers, which in particular for the absorption of flammable, highly inflammable, corrosive or polluting liquids are intended and serves to prevent overfilling of the container.

The object of the invention is to create an overfill prevention device of extremely simple construction and simpler, but at the same time reliable automatic operation.

The overfill protection proposed according to the invention consists of one arranged in the filling line of a storage container Shut-off device with a shut-off member that can cooperate with a stationary seat surface and one inside a cylinder displaceable piston and is characterized by that the piston is sealed against the cylinder and slidably guided, the overhead cylinder chamber connected to the storage container by means of a pipeline, in the pipeline a through a

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ters located float-operated closure flap arranged, as well as the shut-off element can be brought into the open position by means of a manual actuator and also by means of a holding device which is effective by enclosing liquid or gaseous medium in a chamber of the cylinder can be determined in the open position.

Further refinements form the subject matter of subclaims 2-15.

The overfill prevention device according to the invention is explained in more detail with reference to the three exemplary embodiments shown in the drawings explained.

Fig. 1 shows schematically the arrangement of the

different organs in a first embodiment of the invention Overfill prevention.

Fig. 2 is a working diagram of a second

Embodiment of the invention Overfill prevention.

Figure 3 is an elevational cross-section of the portion of the overfill preventer mounted on the storage container of Fig. 2.

Fig. 4 shows partially in elevation cross-section

the part of the overfill protection of Fig.2, which is in the connection area for a tanker is located.

Figures 5 and 6 are working diagrams of a third embodiment of the invention Overfill prevention.

Figure 7 is an elevational cross-section through the

Part of the overfill protection, which is located in the connection area with the tank truck is located.

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In the first embodiment shown in Fig. 1, there is the overfill protection according to the invention on the one hand from a storage container which is generally arranged underground 1 located part 2 and on the other hand one in the connection area with a tank truck located part 3.

The part 2 located on or on the storage container 1 has a float 4 which is used to adjust the opening or closing a closure flap 5 is used, which is arranged in a pipeline 6 extending from the storage container 1. This closure flap 5 connects in the open position Pipeline 6 with the overhead that is always kept free of liquid Interior 7 of the storage container 1. The pipe 6 is together with the filling line 9 through the lid of the Manhole opening 8 carried out and together with this with connected to part 3 of the overfill protection, which is located in an easily accessible place where the Connection with a tank truck takes place.

This part 3 of the overfill protection has a connection chamber 10 for liquid to be filled into the storage container, which is connected in its lower area with the filling line 9 and with a fixed seat of a shut-off device is provided. A shut-off member 11 cooperating with the fixed seat surface, which serves to interrupt the liquid supply to the storage container is firmly connected to a piston 12, which is in a on the connection chamber 10 attached cylinder 13 is guided in a sealed slidable manner. One also attached to the piston 12 Manual actuator 14 protrudes from the cylinder 13 to the outside.

The connection chamber 10 is provided with a hose coupling 15, to which the flexible dispensing hose 16 of a tank truck 17 can be connected.

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The pipeline 6 leads to the sealed upper chamber of the cylinder 13 and connects this sealed chamber in the Open position of the closure flap 5 with the overhead free interior space 7 of the storage container 1. The sealed upper chamber of the cylinder 13 is also connected to the free ambient air by a pipe 18, which with a non-return valve 19 is provided through which the air contained in the cylinder 13 can escape, however no air can flow into the sealed chamber.

The overfill prevention system works as follows: At low Liquid level inside the storage container

t,

For example, at level N ₁ , the float 4 is in the lower position and thus holds the closure flap 5 in the pipeline 6 in the closed position. It is now assumed that the flexible dispensing hose 16 of a tanker truck is connected to the connection chamber 10. The following operations are required to fill the storage container 1:

1) After opening the slide 20 on the tank truck 17, the manual actuator 14 pulled out, whereby the shut-off member 11 is lifted from its fixed seat and the connection is made with the filling line leading to the storage container 1. In doing so, the firmly displaces with the as Handle formed manual actuator 14 connected pistons 12 located in the sealed chamber of the cylinder 13 Air through the pipe 18 and the check valve 19th

2) The withdrawn manual actuator 14 is released. The obturator 11 is now drawing by its own weight to fall back into the closed position, this operation, if necessary, may be supported by a (not shown) return spring. After a slight downward displacement of the piston 12, however, a negative pressure is generated in the sealed upper chamber of the cylinder 13, since

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the pipeline 6 through the closure flap 5, and the Pipeline 18 is closed by the non-return valve 19. Therefore, the shut-off member can no longer go down decrease and is held in the open position due to the negative pressure generated in the sealed chamber of the cylinder 13.

3) As soon as the filling level KL is reached in storage container 1, the float 4 opens the closure flap 5 and thereby brings the interior space 7 of the storage container via the pipeline 6 in connection with the chamber of the cylinder 13. This in turn becomes the one prevailing in the chamber of the cylinder 13 The vacuum is canceled, so that the piston 12

t.

sink down due to the weight of the shut-off member 11 can. In this way, the shut-off element 11 automatically moves into the closed position and closes the storage container 1 leading filling line 9.

4) As soon as the supplier of the filling material determines that the manual control element 14 has lowered, he closes the slide 20 'on the tank truck 17.

5) The manual actuator 14 is then pulled up again, to open the filling line leading to the storage container so that the flexible dispensing hose 16 can be emptied. at This procedure, of course, the manual actuator 14 must be held in the upper position, otherwise it will be automatic drops into the lower position because the flap 5 is in the open position.

6) As soon as the dispensing hose is emptied, the manual control element 14 can be released so that the shut-off element in the closed position falls back and the filling line 9 closes. Then the dispensing hose 16 is of the Connection chamber 10 removed. The filling process of the storage container is now complete.

The overfill prevention system has an extremely simple structure simple, fail-safe way of working. The liquid supply to the storage container 1 is automatically interrupted, so-

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soon the filling level N _{2 is} reached. If it is desired to empty the dispensing hose 16, this embodiment has the disadvantage that the manual control element 14 must be kept in the raised position at all times. In order to be able to empty the dispensing hose, it has to be moved in most cases, whereby it is of course a hindrance if the manual control element 14 has to be held at the same time.

In the second embodiment shown in FIGS the overfill prevention device according to the invention eliminates this disadvantage. As can be seen from the working diagram of FIG.

ι.

visible, in this embodiment, is the one on the storage container 1 located part 2 of the overfill protection designed identically to that of the first embodiment (here the For the sake of clarity, the float 4 and the closure flap 5 are doubled, namely once in the upper open position and are shown once in the lower closed position). Part 3 of the overfill prevention is however slightly modified. The piston 12 also forms the shut-off element, in that its underside 11 serves as a closure for the filling line 9 in the lower piston position.

The sealed chamber of the cylinder 13 is connected to the pipeline 6 having the closure flap 5 via a three-way valve 21 connected. The other two outputs of the three-way valve 21 lead to the free air, namely the output 22 directly, and the output 23 via a throttle point 24 and a non-return valve 25.

The one for venting the sealed chamber of the cylinder 13 The pipeline 18 serving here is not led to the open air, but instead is passed through the piston 12 and opens out into the connection chamber 10. The pipeline 18 is, however, also provided with a non-return valve 19 here.

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In Figures 3 and 4, the parts 2 and 3 of the second embodiment of the overfill protection according to the invention are in Section shown. It should be noted that in this embodiment the closure flap 5 does not form the pipeline 6 with the interior of the storage container 1, but with a ventilation channel 26 '.

The operation of the second embodiment is in terms of of the aforementioned operations 1) to 4) identical to that of the first embodiment.

The three-way valve is used to empty the dispensing hose 16 brought into the position designated in Fig. 2 with A, in which the sealed chamber of the cylinder 13 via the Throttle point 24 is connected to the free air. The lowering of the piston 12 is thus braked and extends over a period of approximately three minutes in which the dispensing hose 16 can be emptied without the manual actuator 14 to have to hold on.

After the dispensing hose has been emptied, the three-way valve 21 brought into the position B of Fig. 2, in which the sealed chamber of the cylinder 13 directly with the free Air is connected so that the piston 12 is rapidly in the closed position sinks.

Corresponds in both embodiments described above the diameter of the piston 12 approximates that of the shut-off member. This training has the advantage that at low weight of piston 12 and shut-off member 11 in the order of 10 kg against automatic closing a fairly high fluid feed pressure can take place. When the weight of the adjustable part is 10 kg and the effective The maximum filling pressure can have a diameter of the piston 12 in this case 100 mm, and the diameter of the shut-off element is 99.5 mm up to 11 bar in order to guarantee perfect closing.

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In practice, the piston cross-sectional area is dimensioned to be smaller than the cross-sectional area of the shut-off element, and this cross-sectional area difference can be ^{less than 5 cm 2.}

The third embodiment shown schematically in Figures 5 and 6 comprises a remote control device for the shut-off member, which can therefore be located anywhere.

The adjustable shut-off member 7 and the associated fixed ^ Seats 28 are located in the storage container leading filling line 26. The shut-off element is firmly connected to a piston 29, which slides in a cylinder 30 in a sealed manner is displaceable, guided and divides the cylinder 30 into two sealed chambers 31 and 32. The lower chamber 31 of the cylinder 30 is closed by a pipe 33 with one in the unfilled state of the storage container Flap 34 connected to the overhead interior of the storage container. The flap 34 is by a first float 35 adjusted between an open and a closed position. A second, also controlled by float 35 Door 36 is open when door 34 is closed and is closed when door 34 is open.

The upper chamber 32 of the cylinder 30 is with the overhead Interior 7 of the storage container connected by a pipe 37 and a flap 38, which is connected by a above the Float 35 arranged float 39 is controlled. A pipe 40 connects the pipe 37 with the Chamber having flap 36.

The remote control device comprises an adjusting cylinder 41 and a piston 42 which can be adjusted by means of a handle 43. The lower chamber 45 of the actuating cylinder 41 is on the one hand with the lower chamber 31 of the cylinder 30 through a pipeline

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46 with a non-return valve 47 blocking the access of medium to the chamber 35, and on the other hand with the filling line 26 connected by a pipeline 48 to a non-return valve 49 blocking the access of medium to the filling line 26.

The upper chamber 44 of the actuating cylinder 41 is on the one hand with the filling line 26 through a pipeline 50 with an access from the medium to the chamber 44 blocking non-return valve 51, and on the other hand to the upper chamber 32 of the cylinder 30 through a pipe 52 with a non-return valve blocking the access of medium to the chamber 32 of the cylinder 30 tied together.

The operation of this embodiment is as follows: If the storage container is empty, i.e. the filling level is N, the two floats 35 and 39 are in the lower one Position and close the doors 34 and 38 while the door 36 is open. After connecting the tanker to the The following operations are to be carried out for filling line 26:

1) By moving the manual control element designed as a handle 43 to and fro, the filling line 26 is located Fluid through conduits 48 and 46 into the chamber

31 of the cylinder 30 is pumped, the one in the upper chamber

32 of the cylinder 31 trapped air can escape through the pipes 52 and 50 into the filling line 26. As a result, the shut-off member 27 is brought into the open position. The piston 29 now holds the shut-off member in the upper open position, in that the liquid contained in the chamber cannot escape.

2) As soon as the filling level N ₁ (see FIG. 6) is reached when filling the storage container, the float 35 opens the flap 34 and closes the flap 36. The liquid contained in the chamber 31 of the cylinder 30 can now pass through the pipe 33 into the storage container

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flow away. The piston 29 then lowers due to the weight of the shut-off member 27 and interrupts the filling process of the storage container.

3) After closing the slide on the tank truck, the handle 43 is again moved back and forth several times and thereby a negative pressure is generated in the chamber 32 of the cylinder 30, so that the shut-off element is again in the open position adjusted. The dispensing hose can now be emptied.

4) When the dispensing hose has been emptied, the non-return valves are closed 51 and 53 opened by hand so that the piston 29 sink into the lower position and the shut-off member 27 can bring into the closed position.

It should be noted that when the filling level N ~ is reached, the float 39 the flap 38 opens, whereby the shut-off member 27 is automatically brought into the closed position.

In all of the embodiments described here, the shut-off member can also be in be applied to the closed position.

FIG. 7 shows a modified embodiment of part 3 of one designed according to the first embodiment Overfill prevention. According to this embodiment has the connection chamber 10 has an annular shape with a seat surface of large diameter, which the filling line 9 surrounds. A membrane 56 is attached at its periphery between the housing of the chamber 10 and the lid 57 for the chamber and has essentially the same shape as a metallic guide 58. The lead is with a Provided annular groove in which a spring 59 is inserted, which on the other hand is supported against the cover 57 and thus the membrane 56 is pressed against the seat 55 "

The metallic guide 58 carries a protruding through the cover 57

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standing handstelT member 60. The between cover 57 and
Guide 58 formed chamber 61 is sealed on all sides and through the pipeline 6 with the closure flap 5, as well
connected through the pipeline 18 with the non-return valve 19 to the open air.

Of course, all of the options described here can be used
Equip embodiments with the remote control device shown in FIGS.

In all of the embodiments, the shut-off element is adjusted directly or indirectly by means of a manual control element. The locking of the shut-off member in the open position takes place in all cases by the inclusion of
liquid or gaseous medium, which is under pressure or has negative pressure, in a chamber of a cylinder, the piston of which is firmly connected to the shut-off member.

-Patent claims: -

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Claims (15)

Patent claims: filling protection, consisting of a shut-off device arranged in the filling line of a storage container a shut-off element which can cooperate with a stationary seat surface and a shut-off element which can be displaced within a cylinder Piston, characterized in that the piston (12, 29, 42) against the cylinder (13, 30, 41) sealed and slidably guided, the cylinder chamber on top by means of a pipe (6, 37, 52) connected to the storage container (1), in the Rohrleitupg one located inside the storage container Float (4, 35, 39) actuatable closure flap (5) arranged, as well as the shut-off element (11, 27) by means of a manual actuator (14, 43, 60) in the open position brought and also by means of a by inclusion of liquid or gaseous medium in a chamber of the cylinder effective holding device can be determined in the open position. 2. Overfill protection according to claim 1, characterized in that the shut-off member (11) by means of a be through Dead weight in the upper cylinder chamber generated negative pressure can be determined in the open position. 3. Overfill protection according to claim 2, characterized in that the upper cylinder chamber by one with a than Non-return valve (5) formed closure flap provided pipeline (6) with the interior space at the top (7) of the storage container is connected. 4. Overfill prevention device according to claim 3, characterized in that the non-return valve (5) by means of a float (4) can be controlled into the closed position until the liquid inside the storage container has reached a predetermined level Water level (N2) reached. 509817/0280 5. Overfill protection according to one of claims 1-4, characterized in that the upper cylinder chamber by a with a non-return valve (19) provided to block the access of medium to the cylinder chamber (18) is connected to the open air. 6. Overfill prevention device according to claims 2 and 4, characterized in that that the upper cylinder chamber through a pipe (18) provided with a flap (19) with the free air is connected. 7. Overfill protection according to claim 6, characterized in that the upper cylinder chamber with the storage container (1) leading filling line (9) through a non-return valve serving to block the access of medium to the cylinder chamber (19) provided pipeline (18) is connected, 8. Overfill protection according to claim 7, characterized in that in which the upper cylinder chamber with the through the Float-controlled flap connecting pipeline a three-way valve (21). Is arranged through which the upper Cylinder chamber by means of a throttle point (24) serving to delay the reset of the locking member with the free air is connectable. 9. Overfill protection according to one of claims 1 - 8, characterized characterized in that the piston and the shut-off member consist of a single integral part due to its own weight is used to close the filling line (9, 26) leading to the storage container. 10. Overfill protection according to one of claims 1-9, characterized characterized in that the piston is closed by a the spring acting on the shut-off element is applied. -..--, '.- 509817/0280 11. Overfill protection according to one of claims 1 -10, characterized characterized in that the manual actuator (14, 43, 63) is firmly connected to the piston and the shut-off member. 12. Overfill protection according to one of claims 1 - 9, characterized in that the piston and the shut-off member consist of a membrane (56). 13. Overfill prevention device according to one of claims 1 - 12, characterized in that the piston (29) and the fixed seat surface (28) have approximately the same diameter. 14. Overfill protection according to one of claims 1-11, characterized characterized in that a remote control device (41-53) with a manual control element is used to adjust the shut-off element (43) is provided. 15. Overfill prevention device according to claim 14, characterized in that the shut-off element (27) by the inclusion of liquid can be determined in the lower cylinder chamber (31) in the open position. 509817/0280 Blank page