DE8334655U1 - Extinguishing or unloading valve for overturned tank vehicles or the like. - Google Patents

Description

Extinguishing or unloading valve for overturned tank vehicles or the like.

The invention relates to a liquid valve for the emergency unloading or refueling of the liquid content of a tank truck o. The like that has overturned or overturned in an accident.

The valve according to the invention can also be used for other cases in which discharge with a controlled flow rate or access to the liquid is desired and the normal liquid discharge or access opening is either frozen or seized or cannot be used for safety reasons.

Corrosive, flammable and other substances and liquids are constantly being found in large quantities around the world transported by road, either by means of a tractor that can be decoupled, one Semi-trailers carrying liquid containers or a tank trailer, each with a number of different ones or similar chambers containing liquids, or by means of a uniform Chassis with or without a tractor and with on it

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i built-up liquid container that has a single ψ

or has several liquid chambers. In a f

3 special application, the tanker can be a ² S

Be a railroad tanker. £

These tank trailers or vehicles are generally divided into several compartments, and at the top Each chamber has an outward access opening through which the chamber in question can be filled and possibly emptied; these access openings are large enough to to let the body of a person through, so that this enables the internal examination of the tank chambers will.

The access or filling openings have different sizes, which are often due to regional legal Regulations are determined which require minimum dimensions; they usually include a (maintenance) Personnel access for repair and cleaning purposes and a filling section that ventilates or cannot be ventilated. The access opening is closed by means of a manhole cover, which in turn consists of a fixed cover plate with a surrounding retaining ring, which the cover plate on

mechanical way over the access opening. This represents the usual possibility for the ver ^ · close and seal the access opening. In the center of the top panel is generally located a bolt-operated window lock (% = *: - closing plate) with or without a venting device, which is released from the manual release of the bolt Cover plate can be pivoted away, so that access to the chamber is established through an opening through the peripheral edge of the attached cover plate is defined. In some cases the access opening is oval, however, it is mostly circular. The cover plate corresponds to the dimensions of the access opening and-. can be attached to this by means of an outer ring: or by means of inner stud attached or else'rait ^ inem Flange be screwed, as the person skilled in the art should be familiar with. '. ■ '

If the tanker overturns or overturns as a result of a traffic accident, the emptying of the individual chambers are currently carried out according to one of several different procedures:

1. Erect the tanker for normal emptying measures can be applied;

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2. Open the latch (closer) to swing open the disk closure and emptying the contents into a collecting basin next to the access opening, in order to then pump the liquid from this basin into a new receptacle; and

3. Drilling the chamber wall at an appropriate point, tapping in the hole, inserting a new gate valve or the like. Valve and suction or discharge of the chamber contents.

Obviously, the mentioned methods are not applicable in every case, because of the physical Location of the overturned tanker, volatility or the caustic properties of the contents or the nature of the surroundings of the accident site, or else due to the lack of suitable equipment for erecting the tanker and for emptying its contents.

With the invention, therefore, a spring-loaded, manually operable flow and relief valve or a discharge valve is created which can be assigned to individual chambers of a tanker. Preferably, this discharge valve can expediently and permanently as an emergency discharge opening in the attached

Cover plate at a suitable point in the circumferential area mounted between the radial flange and the hinged disc closure and so arranged be that the liquid content can be drained to a level at which then a safe opening of the access opening is possible. Αητ a suction hose can then be inserted into the chamber introduced and thus the rest of the liquid charge can be pumped around.

If two such valves are assigned to each chamber, one valve acts as a discharge point for the liquid content and the other as a spring-loaded ventilation valve, which is a replacement for the liquid discharged from the chamber by means of air from the outside allows liquid to escape but prevented. The double valve arrangement is required when that is normally in the disc shutter The load-loaded relief or ventilation valve provided for the fixed cover plate becomes unusable.

The subject of the invention is thus a discharge valve, in particular for emptying or extinguishing an overturned tank truck, with a valve body that

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carries a valve actuating element and is provided with a first, larger bore / which is characterized by a gate valve which is arranged movably relative to the valve body and which is able to close and open the first, larger bore with a seal, ■ and by a means / which pushes the gate valve into the tight closed position opposite the larger bore, but is able to respond to the actuation of the valve actuating element in order to open the gate valve.

The invention also relates to a discharge valve, in particular according to one of the preceding claims, with a valve body which is provided with a _5th

larger and one smaller hole is provided, $. This is characterized by a valve actuating element removed from the valve body with a - \ shaft (part), which slidably penetrates the smaller hole and makes contact with it / ί

by a gate valve with a J movement

relative to the valve body guided downwards ra- ]

lower shaft, with the gate valve being the larger \

Bore to be closed and opened under sealing §

able and the shaft is mechanically coupled to the shaft (part) and to the relative position responds between the stem (part) and valve body, and through a gate valve in sealing and Closing relationship to the larger bore pre-stressing agent.

The following are preferred embodiments of the Invention in comparison to the prior art explained in detail with reference to the drawings. Show it:

1 shows a diagrammatic representation of a previous arrangement for emptying the contents an overturned tank trailer or semi-trailer using a basin and a pump,

FIG. 2 shows a representation similar to FIG. 1 of a

inventive discharge valve using arrangement, in which therefore the need for a pool and the associated danger are omitted,

3 is an enlarged perspective view of a typical attached

Cover plate or a manhole cover to illustrate the preferred position of the Unloading valves according to the invention and - in dashed lines - the preferred installation position a second discharge valve, which may be provided,

FIG. 4 is an enlarged plan view of the unloading valve according to FIG. 3 /

5 shows a section along the line V-V in FIG. 3, on a greatly enlarged scale,

6 shows an exploded view, partially in section, of the upper sections a valve control actuator stem and

Fig. 7 is a partial sectional view of the position of a gate valve when using the Valve mechanism as a relief resp. Ventilation valve.

In Fig. 1 is an overturned tank vehicle 10 together with a recovery tractor 15 with tank structure depicted on a roadside. 0 the content of the one

Chamber of the overturned tanker vehicle 10 is in a (Collection) basin 11 has been drained, from which the liquid under the influence of gravity over a Hose 12 flows to an? Umpe 13, which the Promotes liquid in a corresponding chamber of the recovery vehicle 15. The attached cover plate 14, hereinafter referred to simply as "manhole cover", of the recovery vehicle 15 has been placed on the roadway in order to refill the liquid allow the overturned tanker 10; in general, however, this Mannlockdeckel 14 does not need to be removed, provided that it is located within the outer circumference of the manhole cover 14, lockable closure plate 16 is provided, which be of a known type kaml.

Fig. 2 illustrates a similar situation, but using the valve according to the invention. There is no need for the collecting basin 11.

The unloading valve according to the invention, generally designated 20 in FIGS. 3 to 5, has a body 21, which defines a larger and a smaller hole or 23. The larger bore 22 is with a

provide the protruding nozzle 24 with a hose connection, that in the illustrated embodiment as usual standardized external thread 25 is executed; however, it can be seen that the connecting piece 24 can also be used for any other Hose coupling, e.g. B. be profiled with a cam and groove. On the external thread 25 is a dust (protection) cap 26 A screwed to the larger hole 22 to protect from contamination until use in an emergency.

From the smaller bore 23 protrudes as part of the valve actuating device a displaceably guided actuating shaft 30 out, which penetrates a ring socket, the outer circumference of which is also with a standardized thread 27 is provided, so that when not in use a corresponding protective cap 28, possibly by means of an O-ring sealed, can be screwed over the shaft 30.

The valve body 21 is in a suitable manner, e.g. B. by welding / screwing or riveting, on the peripheral edge portion of the manhole cover 14 or any other suitable location that connects to the interior the tank chamber allowed, attached.

The valve 20 protrudes downwardly into the tank and has an end plate 40 serving as an actuation guide, which is arranged and fixed at a fixed distance from the body 21, for example by means of four symmetrically arranged around the larger bore 22 around screw bolts 41 with corresponding, the screw bolts enclosing spacers 42. On the underside of the bore 22 is a disk-shaped gate valve 43 arranged, the one ring seal 44 made of rubber, an elastomer or another suitable Material for tight closing of the valve carries. The ring seal 44 is inserted into a gate valve 43 Inserted annular groove 45.

The gate valve 43 has a central, downwardly projecting valve stem 47, the opposite (lower) End of a bore 46 in the end plate 40 and another bore 56 in an actuating arm 50 bracket «free (with play) interspersed. The lower end of the shaft is on the underside or outside of the actuating arm 50 by a stop means in the form of a roller pin 48 defined, which penetrates the shaft 47. The task of the actuating arm 50 will be given later be explained in more detail; its rest position is in figure

drawn in dash-dotted lines, while his The actuation position is shown in solid lines in FIG is. In Figure 7, the rest position of the actuator 50 is shown in solid lines.

A helical compression spring 49 is provided between the underside of the gate valve 43 and the end plate 40, which the gate valve 23 constantly in the upward direction in the sense of closing the larger Bore 22 preloaded.

The displaceable actuating shaft extends through in a similar manner 30 the smaller hole 23 and a corresponding hole each in the end plate 40 and in the actuating arm 50. The opposite or lower end of the shaft 30 is in a suitable manner, for. B. by means of a weld 53 attached to the movable actuating arm 50. The actuation shaft 30 is preferably made of three coaxially aligned and mated parts, with an upper shaft part merges into a lower shoulder or flange part 33 which has a central lower recess 32 is provided, in which a (actual) actuation shaft tteil 34 is inserted. The upper shaft part 31

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is designed as an actuating piece 35 as a hexagonal head. A second helical compression spring 36 is supported extends coaxially to the shaft part 34 on the end plate 40 and acts on the underside of the flange part 33 of the upper shaft part 31. At the upper end of the compression spring 49 is the shaft part 34 expediently by ^ inem Rolling pin 38 passes through, which serves as a contact surface for the upper shaft part 31. Sur making a seal between the displaceable upper shaft part 31 and the connecting piece 26 surrounding it is in a An O-ring 29 is inserted into the recess or groove in the inner surface of the bore 23.

If, according to FIG. 5, the actuating shaft 30 is dotted with the finger or by means of a tool from FIG depicted rest position pressed down into the drawn out operating position is (ltore right arrow 60), the actuating arm 50 shifts downward into the drawn in solid line Position and presses against the rolling pin 38 so that the gate valve 43 in the open position is pushed. As indicated by arrow 70, liquid then flows over the larger bore 22 in the hose 12 (Figure 2) in order to be appropriate

Way to be led away.

To avoid the need for a plague holding the Actuating shaft 30 in the depressed position is in the inner peripheral surface of the nozzle 26 a partially circumferential locking groove 75 formed, which - like, still be described - as a locking or locking groove works. The locking groove 75 goes at one end in a vertically upright extending, with her in connection standing. (Insertion) slot 76 across. The sliding one Actuating shaft 30 is provided with a protrusion or pin 77; when pressing down the shaft 30 thus slides from the position shown in dashed lines into the position shown in solid lines (FIG. 5) the pin 77 through the vertical slot 76 down to then, when the shaft 30 is rotated (see. Arrow 80) to enter the horizontal, partially circumferential inner locking groove 75 and thus the shaft 30 and mitiiin to hold the gate valve 43 in the open position according to FIG. To facilitate this activity | the shaft 30 is provided at the upper end of the actuating piece 35 with a hexagonal profile, so that this Locking can be carried out expediently by means of a wrench.

In Figure 3, a second such Entladeventii 20 'is indicated in dash-dotted lines, which can, however, be arranged at any point at which it is in connection with the chamber. When in use, the larger bore of one of these valves 20, 20 'for sucking off the liquid is connected to one end of the hose 12 by screwing (the nozzle), whereupon the actuating shaft 30 is locked in the open position by being rotated in such a way as to that the pin 77 enters the horizontal locking groove 75 and is fixed in this. The second valve 20 'is left in the normal closed position, but the protective caps 26A and 28 of its two bores 22 and 23, respectively, are removed. When the liquid flows out through the larger bore 22 of the main valve 20 (see FIG. 7), the second valve 20 ¹ can be via the gate valve 43 air occur because of the resultant in the tank and in the chamber under pressure, the biasing force of the compression spring 49 overcomes this valve. This is achieved because the valve stem 47 extends without a bracket through the bores 46 and 56, under a negative pressure generated in the tank chamber, which causes a pressure gradient across the gate valve that is greater than that

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The preload force of the compression spring 49 can thus the gate valve 43 move downwards (into the pulled-out position according to FIG. 5) while the actuating arm 50 remains in its rest position so that the liquid flows evenly through the larger hole 22: of the valve 20 can flow. The air flow through the larger bore 22 of the second valve 20 'into the chamber prevents liquid from escaping from this second valve 20 '.

Obviously, the unloading valves 20 can expediently not only on the manhole cover, but also on be arranged at any other suitable location.

Of course, the invention is various changes and modifications possible without that deviates from its scope.

Claims (14)

• · -AI- ■ Schutza -n sayings 1. Unloading valve, in particular for emptying or deleting an overturned tanker, with a Valve body (21) carrying a valve actuating element (30) and having a first, larger one Bore (22) is provided, characterized by a relative to the valve body ('21) arranged to be movable Gate valve (43), which closes the first, larger bore (22) with a seal and is able to open, and by a means (49), which the gate valve (43) in the tight Closing position opposite the larger bore (22) pushes, but to open the gate valve (43) able to respond to the actuation of the valve actuating element (30). 2. Discharge valve according to claim 1, characterized in that the valve-actuating element (30) neither to the first, larger bore (22) is arranged coaxially to the gate valve (43). 3. Unloading valve according to claim 2, characterized in that the valve-actuating element (30) in one • · ■ * • · B ■> • It · » - A 2 - predetermined distance outward from the larger bore (22) in one with the center of the larger Bore (22) and the gate valve (43) coinciding plane is arranged. 4. Unloading valve according to claim 3, characterized in that that the means (49) is a helical compression spring coaxial with the center of the larger bore (22) is arranged. 5. Unloading valve, in particular according to one of the preceding claims, with a valve body (21), which is provided with a larger and a smaller bore (22 and 23), characterized by a valve operating element (30) carried by the valve body (21) and having a shaft (part) i31) which the smaller bore (23) is displaceable and in contact with the seal you penetrated "by a gate valve (43) with a movement relative to the valve body (21) guided, downwardly protruding shaft (47), the gate valve (43) having the larger bore (22) is able to close and open with a seal and the shaft (47) with the shaft (part) (31) -A3- is mechanically coupled and on the relative position between stem (part) (31) and valve body * (21) responds, and through a gate valve (43) in sealing and closing relationship to the larger bore (22) pre-stressing agent (49). 6. Unloading valve / in particular according to one of the preceding claims, with a valve body (21), which is provided with a larger and a smaller bore (22 or 23), characterized by a valve actuator carried by the valve body (21) (30) with a shaft (part) (31), which the smaller bore (23) is displaceable and interspersed with it while producing a seal contact, and the one that can be moved along with it Actuating arm (50) carries through a valve slide (43) with a downwardly protruding shaft (47), which passes through the actuating arm (50) and is displaceable around the valve slide as a function of the position of the actuating arm (50) To bring (43) into the sealing / closing or open position opposite the first, larger bore (22), and through a gate valve (43) in the sealing-closed position compared to the larger bore (22) preloading means (49), which, however, by means of - A 4 - an actuation of the actuating arm (50) to open the larger bore (22) can be overridden. 7. Unloading valve according to claim 6, characterized in that the shaft (part) (31) passes through the actuating arm (50) (holder) frel, so that the gate valve (43) opens when a preload force of the means (49) is applied to it. excessive pressure gradient is present. 8. Unloading valve according to claim 6, characterized in that the shaft (part) (31) the actuating arm (50) (holder) freely penetrated and that means (31, 33, 34) for displacing the shaft (part) (31) are provided according to the position or position of the actuating arm (50). 9. discharge valve according to claim 6, 7 or 8, characterized in that the preloading means (49) is a helical compression spring coaxial with the valve stem (47). 10. Unloading valve according to claim 5, 6 or 7, characterized in that a second biasing means - A 5 - (36) is provided, which preloads the shaft (47) into a rest position / in which the ab- " Lock slide (43) is effectively closed against the larger bore (22). 11. Unloading valve according to claim 5/6 or 7, characterized characterized in that the shaft (part) (31) and the valve shaft (47) lie in a common plane. 12. Unloading valve according to claim 1, 2 or 3, characterized characterized in that the larger bore (22) is provided around its circumference with a hose connection means (27) is provided for connection to a hose (12) or the like. 13. Unloading valve according to claim 8, 9 or 10, characterized characterized in that the larger bore (22) is provided around its circumference with a hose connection means (27) is provided for connection to a hose (12) or the like. 14. Unloading valve according to one of the preceding claims, characterized in that at least one unloading valve unit (20) in a wall (15) of a closed, Liquid containing chamber is arranged.