WO1999038786A1

WO1999038786A1 - Dump valve for containers provided for transporting liquid dangerous materials

Info

Publication number: WO1999038786A1
Application number: PCT/EP1999/000447
Authority: WO
Inventors: Jan-Dirk Beckmann; Otto Feldbinder
Original assignee: Feldbinder & Beckmann Fahrzeugbau Ohg
Priority date: 1998-01-29
Filing date: 1999-01-26
Publication date: 1999-08-05
Also published as: PL191493B1; HUP0002435A3; DE29801375U1; CZ289912B6; CZ9903462A3; ES2183518T3; EP0979201B1; PL335578A1; ATE225303T1; HUP0002435A2; DE59902910D1; EP0979201A1; HU222232B1

Abstract

The invention relates to a dump valve (100) for containers provided for transporting liquid dangerous materials. The dump valve is connected to the container by the valve body (10) through which a valve opening (11) leads. The valve opening can be closed by a valve plate (15). The valve plate lies on the rim of the valve opening (11) in a closed position such that it seals. The aim of the invention is to provide a dump valve which guarantees passive security during accidents and also during long maintenance intervals while simultaneously simplifying and lightening the maintenance. To this end, the invention provides that the dump valve (100) has an encapsulated spiral spring (21) for returning and holding the valve plate (15) in a closed position. The spiral spring (21) is located inside the conical valve plate (15), and supports on the lower part (19) of the valve plate (15) and on the end of a guiding rod (13) which is provided for vertically guiding the valve plate (15) and which is guided through a continuous hole located inside the valve plate (15). The guiding rod is fixed on the valve body (10) and is arranged in the dead center of the valve opening (11).

Description

description

Bottom valve for containers for the transport of liquid

dangerous goods

Technical field

The invention relates to a bottom valve for containers for the transport of liquid dangerous goods, which is connected by means of the valve body to the container through which a through opening leads, which can be closed by a valve plate, which in the closed position lies sealingly against the edge of the through opening, between valve plate and a seal is arranged on the edge and the position of the valve plate can be changed by means of an actuating unit which has a lever arm which is guided through a lateral recess in the through opening.

State of the art

Containers for the transport of liquid dangerous goods which are used ^¬ preferably in road traffic as a tanker, in rail transport as tank wagons and also in container traffic have a bottom valve, which is usually screwed onto an outlet flange, which is arranged in the bottom area of the container.

From EP 0430 664 B 1, a valve assembly for liquid and gas is known, in which a shaft arranged tangentially to the valve passage in the valve body is at a flat circular valve closures ^¬ is set lement. The closure element is 2

means of the shaft from its position covering the valve passage. The arm that connects the closure element to the shaft is guided through an opening in the valve body in the region of the valve passage.

The disadvantage of this construction is that the spiral spring, which is arranged at one end of the shaft and ensures the safe closing of the valve, can come into contact with the sometimes aggressive hazardous substances relatively easily, since these pass through the opening for the arm into the Get wave channel and from there, due to the horizontal alignment of the wave channel can easily get further into the area of the coil spring. The functionality of the valve is then impaired by displacing the lubricants or by corrosion.

In addition, the spring on the outside of the tank represents a compromise in terms of passive safety in favor of the cleanability of the valve construction.

From GB 922,389 a bottom valve for bulk containers is also known, which has certain design features with the valves for liquid hazardous substances. This is designed such that the bottom valve is to remain closed due to the pressure of the bulk material.

For this purpose, a spring mechanism has been proposed, the tension of which is to achieve a secure closure. The problem here is, however, the Substituted ^¬ staltung of mechanics, since their parts come into contact with the bulk material, which often is the functi ^¬ onstüchtigkeit impaired. Ultimately, the known valves do not ensure passive safety. 3 guarantees and the maintenance and thus the cleanability is not given.

Presentation of the invention, task, solution, advantages

It is therefore an object of the invention to provide a bottom valve for containers for the transport of liquid hazardous substances in such a way that it ensures passive safety in the event of accidents and also in the case of longer maintenance intervals, and at the same time simplifies and simplifies maintenance.

This object is achieved by the characterized features of claim 1.

For this purpose, it is provided according to the invention to create a bottom valve which has an encapsulated spiral spring for resetting and for holding the valve plate in the closed position, which is arranged in the interior of the valve plate. The underside of the valve plate has a flat peripheral edge, which is provided with a flat seal arranged in a groove in the valve plate. This edge or the flat seal lies flat on the valve body in the closed position, so that an optimal seal is achieved by the wide support of the valve plate compared to the prior art.

The valve disk advantageously consists of a lower part and a conical upper part, which are preferably screwed together.

A guide rod for the valve plate is arranged centrally in the through opening for emptying the container, the guide rod being held by a holder 4

for fixing on the valve body. Furthermore, a lever arm of an actuating device projects into the through opening, which is articulated on the lower part of the valve body. This ensures that the majority of the through opening is free of devices, which enables unimpeded emptying.

The through opening is closed by the conical valve disc, the tip of the cone protruding into the bulk material container. The arranged in the valve plate, tapered spiral spring is supported on the inside on the underside of the valve plate and on the guide rod guided inwards through a through hole in the underside of the valve plate or on a stop fixed at the end of the guide rod, so that the valve plate on the The valve body is pressed and thus closed. The through hole in the underside of the valve plate is designed as a sliding bush in which the guide rod is mounted for vertical guidance. When the bottom valve is opened, the valve plate is lifted from the valve body along the guide rod, the coil spring being tensioned so that the closing is supported after emptying.

It is also provided that the actuating unit can be actuated manually, pneumatically or in another suitable manner.

The sliding bush is preferably provided with a coating so that there is no need for lubrication. 5

The inventive design of the bottom valve with only the holder and the guide rod in the through-hole through which the liquid material pours prevents the material from being inhibited and coming into contact with parts that are at risk of corrosion. In addition, the liquid dangerous goods can not impair any function, in particular spring devices for closing the bottom valve by soiling, since the liquid goods would have to move against gravity, so that the bottom valve is always securely closed. The bottom valve according to the invention advantageously offers increased passive safety due to the internal spiral spring, while cleaning of the bottom valve is possible without shadowing due to the conical design of the valve plate. The flat gasket can easily be replaced by unscrewing the upper part of the valve plate, which significantly increases the ease of servicing.

Further advantageous refinements are characterized in the subclaims.

Brief description of the drawings

The invention is explained in more detail below with reference to drawings. Show it

1 is a partially sectioned side view of a bottom valve according to the invention in the closed state,

Fig. 2. in a partially sectioned side view of an inventive bottom valve in the open state, and Fig. 3. The spring of the bottom valve in a top view.

Best way to carry out the invention

The bottom valve 100 according to the invention consists of a valve body 10, via which the bottom valve 100 is connected to the container for liquid hazardous substances, not shown. The valve body 10 has a through opening 11, through which it is emptied and in the area of which the movable parts of the bottom valve 100 are arranged. A holder 12 for a guide rod 13 projects into the through opening 11. The guide rod 13 is held by the holder 12 at one end 14 in the middle in the through opening 11. The valve plate 15 is slidably mounted on the guide rod 13, the valve plate 15 being articulated adjacent to the holder 12 for the guide rod 13 on an actuating unit 16, by means of which the opening and closing of the bottom valve 100 is controlled. The valve plate 15 is already located in the interior of the container and is seated on the valve body 10 with an edge 17 running around the bottom and thus seals the container. The valve plate 15 consists of an upper part 18 and a lower part 19 which are screwed together. The upper part 18 is conical, so that the bulk material can slide away from it. Between the upper part 18 and the lower part 19, a flat gasket 20 is held in a clamped manner, the flat gasket 20 having the same outer diameter as the upper part 18, which is larger than the diameter of the through opening 11 and the outer diameter of the lower part 19, so that the flat gasket 20 by the Upper part 18 is pressed onto the valve body 10. The contact pressure is reduced by a conical 7

Running spiral spring 21 (FIG. 3) is reached, which is arranged in the interior 22 of the valve plate 15. The conical shape of the spiral spring 21 is adapted to the conical shape of the upper part 18 of the valve plate 15. The spring seat of the lower part 19 of the valve plate

15 is provided between the sliding bush 23 for the guide rod 13 leading into the valve plate 15 and the raised edge 25 provided with a thread 24 for screwing the upper part 18 and lower part 19. The other side 26 of the spiral spring 21 is supported on the end 27 of the guide rod 13 located in the valve plate 15 or on a washer 29 fastened with a nut 28 to the end 27 of the guide rod 12. When the bottom valve 100 is opened by means of the actuation unit 16, the spiral spring 21 is compressed (FIG. 2). After emptying, the tensioned coil spring 21 brings the valve plate 15 back into contact with the valve body 10. The sliding bush 23 is integrally formed on the lower part 19 of the valve plate 15 and has a coating 31 on its sliding surface 30 to reduce the friction, such as. B. Teflon or the like. The operating unit

16 can be operated manually or pneumatically or in any other suitable manner. The actuation unit 16 consists of a lever arm 32 which is articulated on the lower part 19 or directly on the outside of the sliding bush 23. The lever arm 32 is moved by means not shown here, which is articulated again on the valve body 10. However, this fulcrum is not located directly in the area of the passage opening 11 but in a lateral recess 33 in the passage opening 11. On the side of the bottom valve 100 opposite the container, the bottom valve 100 is provided with a connecting piece 34, which is only partially shown here. 8th

Reference list

Bottom valve 100

Valve body 10

Through opening 11

Bracket 12

Guide rod 13

Late 14th

Valve plate 15

Actuating unit 16

Margin 17

Top 18

Lower part 19

Flat seal 20

Coil spring 21

Interior 22

Slide bush 23

Thread 24

Margin 25

Page 26

Late 27th

Mother 28

Disc 29

Sliding surface 30

Coating 31

Lever arm 32

Recess 33

Connector 34

Claims

9 Claims

1. bottom valve (100) for containers for the transport of liquid dangerous goods, which is connected to the container by means of the valve body (10) through which a through opening (11) which can be closed by a valve plate (15), which seals in the closed position abuts the edge of the through opening (11), a seal being arranged between the valve plate (15) and the edge and the position of the valve plate (15) being adjustable by means of an actuating unit (16) which has a lever arm (32) which is guided through a lateral recess (33) in the through opening (11), characterized in that the bottom valve (100) has an encapsulated spiral spring (21) for resetting and for holding the valve plate (15) in the closed position, the spiral spring (21) inside the conical valve plate (15) and on the lower part (19) of the valve plate (15) and the end of a through hole in the interior of the valve plate (15) guided guide rod (13) for the vertical guidance of the valve plate (15), which is fixed to the valve body (10) and is arranged centrally in the through opening (11), and that to the valve body (10 ) facing underside of the valve plate (15) has a flat peripheral edge (17) which is provided with a flat seal (20) which lies flat on the valve body (10) in the closed position. 10

2. Bottom valve according to claim 1, characterized in that the spiral spring (21) is tapered.

3. Bottom valve according to claim 1 or 2, characterized in that the lower part (19) of the valve plate (15) has a circumferential recess around the through hole, in which the coil spring (21) is supported.

4. Floor valve according to one of claims 1 to 3, characterized in that the end (27) of the guide rod (13) on which the coil spring (21) is supported is provided with a stop.

5. Bottom valve according to claim 4, characterized in that the stop consists of a disc (29) which is inserted onto the end (14) of the guide rod (13) and secured with a nut (28).

6. Bottom valve according to one of claims 1 to 5, characterized in that the through hole is designed as a sliding bush (23), which can be provided with a coating (31) to improve the sliding behavior.

7. Bottom valve according to one of claims 1 to 6, characterized in that the valve plate (15) consists of a lower part (19) and a conical upper part (18). 11

8. Bottom valve according to claim 7, characterized in that the lower part (19) and the upper part (18) are detachably or non-detachably connected to each other.

9. Bottom valve according to claim 7, characterized in that the lower part (19) and the upper part (18) are screwed together via a thread (24).

10. Floor valve according to one of claims 1 to 9, characterized in that the valve plate (15) has a groove for receiving the flat gasket (20) directly below the peripheral edge.

11. Bottom valve according to claim 10, characterized in that the groove is arranged in the contact region of the lower part (19) and upper part (18).

12. Bottom valve according to one of claims 1 to 11, characterized in that the actuating unit (16) can be actuated mechanically, pneumatically or otherwise, the valve disk (15) being displaced along the guide rod (13).

13. Floor valve according to one of claims 1 to 12, characterized in that the lever arm (32) is articulated on the underside of the valve plate (15).

14. Bottom valve according to claim 13, characterized in 12 that the other end of the lever arm (32) is articulated on an axis which is located in the lateral recess (33) of the through opening (11).

15. Bottom valve according to one of claims 1 to 14, characterized in that on the outside of the valve body (10) in connection with the through opening (11) a connector (34) is fixed, which may have coupling elements.

16. Bottom valve according to one of claims 1 to 15, characterized in that the encapsulated spiral spring (21) is arranged in the interior of the tank and the holder (12) is arranged close to the tank, whereby the passive safety in the event of accidents is increased.