DE2159110A1 - Double-acting central valve for containers, especially for tankers - Google Patents

Description

ng. W .-. »CrMeissner ΜΟπΟΠβΠ" '': ■

Dipl. Ii ^: - ■ '■' ■ ^ί2ΐι . ^ Cner.

Bu r υ ι; u.ic π en
Munich 2, valley 71

DOUBLE-ACTING CENTRAL VALVE TO KEEP, IN PARTICULAR

TO TANKER VEHICLES

The invention relates to a double-acting central valve, in particular to a tank truck, which in the Transport of toxic or explosive, low-viscosity liquids can be used. Opening and closing the Valve can be carried out next to the tank truck, from the ground.

On the basis of many years of practice, a drainage system for emptying the container has been found in tank trucks developed, which is a double system. And although there will be a central valve approximately in the middle of the container

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til, which has a discharge opening pointing in two sides. These close each other via a drain pipe! so-called side drain valve located on each side . In order to achieve a more secure seal, these side drain valves are also provided with a threaded cap. The liquid can therefore be peeled off after opening the central valve, after removing the side drain valve cap and after opening the sixth drain valve.

In addition, for tankers that transport toxic or explosive, thin-bodied substances, e.g. gasoline, a widespread solution that the central valve in itself is also of a double system to one to achieve increased tightness. The effective seals of the valve seats are to ensure a good closure generally "soft packs".

In the solutions generally used up to now, the central valve is actuated from the roof of the container, and indeed with the aid of a threaded spindle and a handwheel. For this purpose, a roof walkway is attached to the roof of the container. The side drain valves can be operated standing on the ground. Operation from the roof walkway is - depending on the weather conditions - at risk of accidents and this is a factor - in connection with the attachment or control the customs seals - also on the customs personnel.

Another disadvantage is that in this central valve, one threaded spindle has two valve disks pulls against each other. Thus, the entire mechanism is located inside the container, or the cast housing. In the event of unsuitable sealing conditions, e.g. worn seal or contamination, the spindle can be coated and tear off the mother. In such a case, the mechanism will be inaccessible to repair is cumbersome and the load must be

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pe to be drained. .

The circumscribed system corresponds to the West German one System "Gestra", which is widespread with minor changes and in the majority of cases still is applied today.

To eliminate the disadvantages mentioned above, the solution described above has recently been further developed, because the contracting and operating companies because of the increasing traffic and manpower problems make the requirement that the discharge device of the tank truck can be operated from the ground. For this reason, those to be operated from the roof of the bed container, traditional devices have become ineffective and unusable in the cars to be built in the future. Thus, the further development was based on the fulfillment of the requested operability from the ground.

Although it was possible to enable operation from the ground during the further development, it was still possible the double construction or the seal of the central valve cannot be released. As a result, it becomes easy The valve is only pressed towards the valve seat by a coil spring with a force of around M-O kg. With manual strength the sealing force of the closing cannot be influenced and with this solution the seal does not offer any appropriate security. '·

This disadvantageous fact is due to the invention Solution eliminated, since the same - in addition to being operable from the ground - also doubles Sealing secures, and indeed with the help of two elastically interconnected valve plates.

This elastic connection according to the invention allows that on the two valve seats manufactured to one another within a certain tolerance without Oil r », - if two such valve seats sit on, which are separated from each other before being clamped in a different

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stood were.

The progressive nature of the invention is revealed in the fact that the double seal according to the invention is secured by the elastic connection of the valve plate, - whereby when closing the lower plate by the immediate closing force, while the upper plate is due to the spring force generated by the lower plate getting closed. When opening, both plates are opened by the directly acting opening force of removed from the valve seats.

Thanks to its advantageous characteristics, namely the fact that it can be operated from below, the double locking surface and the safe opening system, the solution according to the invention surpasses the previously known solutions and meets all requirements that have not yet been met. The execution of the same is simple and economical.

An embodiment of the invention with respect to of the central valve and its actuation is illustrated in the drawings. It shows

1 shows a longitudinal section through the inventive contraption

Fig. 2 is a plan view of the actuating elements.

The valve according to the invention sits in the one along the lower line of production of the container jacket 1 welded, circular and on its mating surfaces machined steel collar 2. The valve consists of two main bodies. The upper body 2 protrudes into the container body into it and its cylindrical inner surface, the guidance of the upper valve 5 adapts. Others The conical valve seal S and the clamping washer 7 are located on the end face.

The seal of the upper "entiis 5" is off

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solid, other soft packaging, while in the case of the transport of black goods, e.g. masut made of bronze will.

The lower body 4 comprises the lower valve seat, the spout flanges and the valve lever-fork system. Its upper flange adjoins the flange of the upper body 3 in a sealed manner and is fastened with the same to the collar 2 welded into the container by means of screws. The seal used for the mating surfaces is made of cardboard treated with hermetic. At the lower part of the lower body 4 there is an assembly opening closed off with a cover 25, through which the assembly of the bolt of the valve lever fork 15 can be accomplished.

On the flow opening with a conical rim of the lower body 4 is supported by the lower valve disk 8, on which the conical valve seal 9 and the clamping washer 10 are built. The lower valve disk 8 is on its upper cylindrical Oval bore located at the end, over the bolt 11 built therein, over the pressure ring 12 assembled therewith and connected to the upper valve 5 via the compression spring 13 supported thereon. '

The mating surface between the two valve disks is cylindrical, with the two valve disks in proportion can be moved axially to each other. The guidance on the cylindrical surfaces ensures the concentric Seat of the sealing surfaces.

The compression coil spring 13 axially connecting the two valve disks eliminates the overdetermination of the two valve surfaces in relation to one another.

The lower valve 8 is attracted by means of a pull rod 14 through the valve lever fork 15, which is wedged onto an axle 16. This emerges from the lower body M through a stuffing box 17. The axis 16

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can in the way of another at its outer end wedged fork 18 and operated via a pull rod 19. The operating elevator consists of one Housing 24, a threaded spindle 21 and a trunnion nut 20. The threaded spindle can with the help of a handwheel and a cardan shaft 26 can be turned over from the car side. The one that can be operated from the other side of the car The handwheel is turned by a pair of spur gears 22 wedged onto the threaded spindle 21 or onto the axis 23 .

When the valve is opened, pull rod 14 lifts the Lever fork 15 on the lower valve disk 8. After it has been lifted, the upper valve disk 5 also settles in Movement after the end face of the lower pipe part of the upper valve disk 5 is against the lower valve disk 8 bumps. The compression coil spring 13 is also relieved here. Then both valves lift together and thus the valve reaches its fully open condition. The lifting of the same is done by a located on the opposite side of the lever fork 15 cams prevented.

When the valve closes, the lever fork 15 sinks and the upper valve disk 5 rests first the seat. Then, with the gradual compression the compression coil spring 13 pulls the forked pull rod 14 the lower valve 8 also on the seat. When you sit on it, the full force already acts the actuating device on the lower valve disk 8. At the same time, only the pretensioning force of the compression coil spring pulls 13 place the upper valve plate 5 on the valve seat. To avoid overloading the lower valve 8 To prevent this, the seal is made of bronze.

As can be seen from the discussion above, the device complies with the one described here Invention all requirements that other devices could not meet up to now.

209827/057 1 bath OBiGiHAL

Claims (1)

59110 PATENT CLAIMS l '.) Double-acting central valve for containers, in particular for tank trucks, characterized in that the central valve attached to the bottom of the container jacket (1) has a double valve seat with a lower ζ 8) and an upper (5} valve disk, with a seal (6, 9) between the valve disks and the valve seats, with a guide collar on the upper valve disk (5), with a device connecting the valve disks, with an oval hole made in the pin of the lower valve disk (8), with a connecting bolt C1I) , with a pressure ring (12), with a pressure spring C13) resting on the ring, which pressure ring (12) and spring (13) are located on the guide flange of the upper valve disk (5) provided with an oval hole, with the hole in the guide flange the cylindrical pin of the lower valve disk (8) is seated, and furthermore that, to open the valve, a tie rod adjoining the lower valve disk (8) from below e (14), an associated valve lever fork C15) and an axis (16) actuated by a threaded spindle (21) are used. 2. Double-acting central valve for containers, ä according to claim 1, characterized in that the axis (16) of the opening and closing of the valve actuating threaded spindle f2l) is arranged below the container. 3. Double-acting splitting valve for containers _s according to claim 1, characterized in ₉ that the upper valve disk ('5) is provided with a soft _s while the lower valve disk (8) is provided with a hard seal. U. Double-acting central valve for container · ^ according to claim 3, characterized gske η η se ieh η e:; ₀ that the soft packing of the upper Verririlrallers (5) -7- 209827/057 1 ^B. graphitic danamid, while the seal of the lower Valve plate (8) made of non-ferrous metal, expediently made of bronze. . 5. Double-acting central valve for containers according to claim 1, characterized in that e t that the closing and opening actuating device mounted below the container of both Sides of the container can be operated and a pair of spur gears (22) installed to change the direction of the moment is. . -8th- 2098 27/0571