DE2340942A1 - VALVE WITH A TUBULAR METAL HOUSING - Google Patents

Description

07-0275 Ge August 9, 1973

HONEYViELL GmbH
6000 Prankfurt am Main

Valve with a tubular metal body

The invention relates to a valve with a tubular metal housing with two lateral connections and a sealed outwardly displaceable along the pipe axis, the Throttle body supporting valve rod. Valves of this type are available both as straight-way valves and in the form of multi-way valves known. Depending on the intended use and direction of action of the actuator (pressure closes or pressure opens), the valve housings have different structure. The manufacturing costs and storage are correspondingly expensive.

Furthermore, it has already been proposed that the housing of such valves made of plastic. In practice, however, it has been shown that in particular the connecting pieces of such valves repeated installation and removal and the valve housing at which pressures and temperatures of the flowing medium mechanical deformation suffers, which leads to deteriorated sealing properties or obstruction of the throttle body movement to lead.

For reversing the direction of action of pneumatic valves, it is further known to use either different actuators or one reversible drive. In the first case, you have to

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two different drives can be built and kept in stock. A reversing drive is more expensive than a single-acting drive .

The invention is based on the object of designing a valve of the type mentioned at the outset in such a way that one and the same valve housing can be used for different modes of operation, which is simple in construction and inexpensive to manufacture but is still robust and reliable in operation.

This object is achieved by the invention described in claim 1.

The one for adapting the valve housing to the different operating modes Required inserts are relatively cheap in the plastic injection molding process, for example made of glass fiber reinforced Plastic can be produced. As will be explained in detail later on the basis of the exemplary embodiments, the invention opens up furthermore the possibility that depressurized for a globe valve closed, a straight-way valve opened without pressure and a multi-way valve not only has the same valve housing, but also the same drive and valve cone are used. The metal valve housing, which is highly resilient in terms of strength absorbs the forces emanating from the internal pressure and the pipe connections and prevents deformation of the inexpensive Plastic manufacturable inserts due to these forces mentioned.

Advantageous embodiments and developments of the invention result from the subclaims. To explain the invention Reference is made below to an embodiment shown in the drawings, each in longitudinal section or partial cut in

.Figur 1 a through valve closed without pressure; in Figure 2 a through valve open without pressure, and in Figure 3 a three-way valve

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each using the same valve housing, the same Actuator and the same valve cone reproduces. The new valve can be equally beneficial in conjunction with an electrical one or hydraulic or other mechanical drive can be used.

The substantially tubular housing 1 has two lateral Connection pieces 2 and 3 on. Put on the metal housing 1 is a pneumatic valve drive 4 of conventional design. The lower end of the tube facing away from the valve drive 4 is shown in FIG closed by a plastic insert 5. A plastic insert is inserted into the housing 1 from the side facing the drive sealed inserted, the valve seat 7 between the two lateral connections 2 and 3 and at the level of the lateral Connection 2 has an inlet opening 8. An essentially conical throttle body 10 is located on the valve rod 9 attached to the end of the control contour 10 with a soft seal 11. The inserts 5 and 6 are sealed with respect to the housing 1 by O-rings 12 or similar sealing means. You can in the housing 1 can be screwed in, pressed in or held therein by clamping means such as clamping screws or bolts. The outer one The cross section of the housing 1 can deviate from the circular shape, for example be square. When compressed air is fed into the upper Chamber of the drive 4, the membrane moves the valve rod 9 downward against the force of the closing spring and opens the valve. The medium flows from inlet 2 to outlet 3. The valve rod 9 is guided in the plastic insert 6, which is also the stuffing box packing 13 receives and at its upper end with an external thread is provided for screwing on the packing nut 14.

Figure 2 also shows a through valve now in the open position, which _ in the absence of control pressure by the return spring is kept open. Here, too, the medium flows in the opposite direction to the closing movement of the valve cone 10, that is to say from the Inlet 3 to outlet 2. On the drive, not shown

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On the side facing it, the tubular housing 1 is closed by an insert 16 which, on the one hand, serves to guide the valve stem - ¹ - and, on the other hand, as before, accommodates the stuffing box packing. The valve seat 17 is here part of a second insert 18 which is inserted from the opposite pipe end and which closes this pipe end with its bottom 19 and also has a lateral inlet opening 20 at the level of the inlet connector 3.

In the case of the three-way valve according to FIG. 3, the one facing the drive 4 Side uses the same plastic insert 6 as in Figure 1. In the opposite end of the housing 1 is a metallic Connection piece 21 is screwed in in a sealed manner for connecting to the third line connection. It forms one at the same time Valve seat 22. Two of the valve cones 10, with their blunt ends lying next to one another, attached to the valve rod 9 and working with the two opposing valve seats 7 and 22 together. A first medium, e.g. hot water, enters the valve housing via inlet 2, while a second Medium, e.g. B. cold water, via the inlet 21 arrives. A mixture corresponding in its proportions to the respective valve position leaves the valve via outlet 3. The use of one and the same throttle body for two-way valves with different Operating mode as well as for three-way valves is known per se from utility models 1 935 815 and 1 935 816. Of the Throttle body can be used in the valve according to the invention both, as shown, as a valve cone or, as in the mentioned utility models, as a hollow cylinder with lateral '! Be formed through openings. The invention is not limited to the illustrated embodiments of straight-way and three-way control valves limited but can also be used with other valves, such as multi-way valves, switching valves or the like. the.

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Claims (5)

Claims MJ valve with a tubular metal body with two sides Connections and a valve rod, which is displaceable along the pipe axis and guided in a sealed manner to the outside and carries the throttle body, characterized in that in the at least internally tubular metal housing (1) from the one On the other hand, the parts for guiding and sealing the valve rod (9) are essentially bush-shaped and have the first Insert (6,16) made of plastic and, from the opposite side, a closing tube which closes the opposite end of the pipe and / or a valve seat (17) having a second insert (5, 18, 21) are inserted in a sealed manner. 2. Valve according to claim!, Characterized in that that the first plastic insert (6) has a side inlet opening (8) and a valve seat (7) located between the two lateral connections (2, 3). 3. Valve according to claim 2, characterized in that the second insert (21) consists of metal and one has a second valve seat (22) and an axial pipe connection (23). 4. Valve according to claim 1, characterized in that that the second insert (18) is made of plastic, closes the opposite pipe end and a lateral one 509809/0070 Inlet openings (20) and one between the two lateral ones Connections (2,3) lying valve seat (17). 5. Valve according to one of claims 1 to 4, characterized in that the valve housing (1) and the pipe connections (2,3,23) made of brass and the plastic insert (6,5,16,18) made of glass fiber reinforced plastic injection molding consists. 509809/0070