CH662869A5 - MULTI-WAY VALVE. - Google Patents

Description

The present invention relates to a reusable valve with two connection valves lying on a common axis.

a valve housing with at least three port openings.

tions, two lying on a common axis, and the invention is explained in more detail below with the aid of an embodiment, a valve seat and a valve closure member, for example. In the accompanying drawings, which are controlled by a gear mechanism by means of a shaft through which the wall of the valve housing is shown, the one valve closure body is only shown in FIG. 1, a longitudinal section through the valve, both of which can be actuated when the other is in the closing position valve body are in the closing position;

tion. Figure 2 is a section along the line II-II of Figure 1;

Such a valve is known from DE-PS 882 930. 3 shows a longitudinal section, as in FIG. 1, but with an axial drive for the two valve closure-closed position of the upper valve closure body and body and is specific to the use in connection. FIG. 4 is a similar section with the closure position of the manure with vacuum pumping stations with diffusion and lower valve body.

pump tuned. Because due to this use, a third connection of large nominal size in the space between ss in all figures means:

the two valve bodies open and the actuator 1 the valve housing, which e.g. from an aluminum alloy

mechanism located above the upper valve body can exist with three connection openings A, B, C;

must be, there is a large height, which is undesirable in the often la den the connection opening B having the tight space on vacuum systems valve housing, which is lb and O-ring seal. Because of its specific structure, the well-known 60 screws 1 c is sealing on the cylindrical part of the valve

Valve for more general use is attached to the vacuum housing;

technology also unsuitable. 2 a (first) designed as an upper valve closure body

From DE-PS 501 348 a gate valve is also known, the one or connected to this one-sided open hollow

in which the shut-off spindle with the interposition of cylinder;

Leaf springs with the slide seal plates coupled 6s 3 one (second) as the lower closure body

is that the leaf springs are used as spreading springs, or pistons 1 connected to it;

such that its ends on the slide plates and its 4 a transverse shaft for the actuation of an im

Press in the middle of the valve spindle or on the housing. Inside the hollow cylinder 2 located gear, wherein

the stub shaft 4a is mounted in a recess 4b of the cylindrical part of the housing wall;

5 a gear e.g. designed as a one-part or multi-part crankshaft or as a cam mechanism which effects the axial stroke required for opening and closing the valves;

6 a link driven by the crankshaft;

7 an operating lever for manual operation of the valve;

8a and 8b seals of the valve seats e.g. O-rings made of an elastomer or metal sealing rings;

9 a compression spring, which has the task of producing the contact pressure required for the tight closing under the action of the stroke generated by the gear 5;

10 the seal of the shaft passed through the housing wall, this seal being designed in the simplest way as an O-ring seal.

In Figure 1, the valve is drawn in the closed position of both valve closure bodies, that is, there is no connection from A or B to C in this state. If such a connection is now to be made, for example, between connection port A and C, the transmission is actuated accordingly and thus brings about the position of the valve closure member shown in FIG. 3. This switching position of the valve can e.g. in a vacuum pumping station to establish a gas-conducting connection between a recipient connected at A and a backing pump connected at C, in which position the recipient is pre-evacuated with side B shut off (to which, for example, the diffusion pump of a vacuum pumping station can be connected). With the help of the actuating lever 7, the valve can also be brought into the position of FIG. 4, in which, as can be seen, the connection opening A is blocked, whereas the connection between B and C is open. In this position, the diffusion pump would be pre-evacuated in the aforementioned vacuum pumping station and thus brought ready for the recipient to be highly evacuated. This is effected as soon as a main valve located between the suction side of the diffusion pump and the recipient is opened.

The transmission 5 is advantageously designed so that the operating lever 7 from a zero position through a

662 869

simple rotation by 90 ° in one direction or the other brings about the desired switching state of FIGS. 3 and 4. This makes the operation particularly clear, which is particularly important for manual operation.

Of course, any other known drives can be provided instead of a mere actuation lever; e.g. could be a pneumatic rotary piston drive with pilot valve or e.g. a stepper motor can be used, and the arrangement can also be designed for flow control. There can also be stops for limiting the rotational movement when the valve is actuated and switching cams, for example for position sensors. The special design of drives is not the subject of the present invention and can be carried out by the person skilled in the art in a variety of ways if necessary.

A particular advantage of the valve according to the invention results from the fact that, in contrast to conventional corner valves, no bellows is required for sealing, as a result of which its area of application is considerably expanded thanks to greater freedom in the selection of the materials that can be used for its construction. E.g. it can be designed for use in conjunction with corrosive gases without great difficulty. The minimal number of moving parts makes it robust and less susceptible to malfunctions, and due to its clear functional principle, incorrect operation is practically impossible and overlapping functions is impossible. No adjustability of any parts is required, which significantly reduces the cost of manufacture. The housing can e.g. can be made very easily from extruded profiles.

As can be seen by the person skilled in the art, the valve according to the invention with its various possible positions of the valve closure bodies can be used in particular for numerous tasks for controlling the gas flow in vacuum systems. It offers special advantages due to its symmetrical, compact construction, which makes it easy to use and install. Thanks to its compactness, it can even be carried out in the small flange standard dimension series and often enables retrofitting in correspondingly standardized systems and generally in systems with limited space.

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3 sheets of drawings

Claims (6)

662869 2 PATENT CLAIMS In connection with this gate valve the 1. Reusable valve with a valve housing with little use of a sleeve described, in which the least three connection openings, two of which are housed on a common-drive parts and where the same axis and each have a valve seat and a Ven drive shaft for the two slide plates are assigned to the flow-through valve body, which is arranged transversely by a gear axis. by means of a through the wall of the valve housing- The object of the present invention is to control a guided shaft in such a way that the valve body valve of the type mentioned in the introduction can only be actuated in such a compact design if the other is to be designed, that it is in the closed position in a wide variety of applications, characterized by technology, in particular vacuum technology, that the first valve closure body can be set with a one-sided io. open hollow cylinder (2) and the second one in the This task is solved by the design of the Hollow cylinder immersed and guided by this valve according to claim 1, with the characteristic that Piston (3) is connected, and the gear (5) inside of the first valve closure body with an open on one side Hollow cylinder (2) between the two valve closure body hollow cylinder and the second arranged with a pern in the hollow cylinder and by means of a transverse to the valve axis immersed and guided by this piston (4) leading shaft (4) is operable. is, and the gear inside the hollow cylinder between 2. Reusable valve according to patent claim 1, characterized in that the two valve closure bodies are arranged and characterized by the closed outer end face of a hollow cylinder (2) which can be actuated to be transverse to the valve axis being designed as a valve closure body. forms is. 3. Reusable valve according to claim 1, characterized 20 By such an embodiment, one simultaneously achieves that the various advantages facing away from the hollow cylinder (2). Above all, there is a very com front side of the plunger (3) immersed in this as a valve pact and in particular also a stable construction, because it is designed with a closure body. the valve closure bodies connected and with each other 4. Reusable valve according to claim 1, thereby interacting hollow cylinders or pistons are characterized in that the hollow of the hollow cylinder (2) leads on both sides, with the housing of the gear inside between the inner end face of the same and a gearbox of the cylinder cavity outside the cylinder the member (6) leaves a compression spring (9) for generating the closing space for an annular flow space for the force. media to be conducted through the valve. This flow 5. Reusable valve according to claim 1, characterized space is only characterized by the transverse, through the wall that the annular free interior of the 3 »of the valve housing shaft for actuating valve housing (1) penetrate at least the same cross section as the transmission. each of the arranged on the common axis is particularly advantageous that the closed exterior Has connection openings (A, B). Face of the hollow cylinder and the side facing away from it 6. Reusable valve according to claim 1, characterized in that the end face of the piston itself is characterized as a valve closure member, that the gear members (6) can be formed from materials 35, and that the hollow cylinder and the self-lubricating properties exist. need not be sealed against each other by this guided piston. It is recommended to dimension the valve housing so that the free annular interior for the Flow of liquids or gases has a cross section 40 which is at least equal to the cross section of FIG