DE2439645A1 - TAP GATE WITH SLIDING CLOSURE - Google Patents

Description

Tap slide with slide lock piece

The invention applies to valve gate valves with slide lock pieces.

Faucet valves with a housing with a cylindrical inner cavity and a fluid inlet opening are known and is provided with a fluid outlet opening and with a closure piece which is translatory perpendicular to the axis of the outlet opening under the action of an actuating rod fixed to this closure piece is movable.

In the valve gate valve of this known type, the operating rod is arranged in the axis of the latter and the closure piece, in the form of a piston, occupies a considerable volume of this cavity.

These faucet valves have the following disadvantages due to this arrangement: the difference in the

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upper mid lower part of the locking piece acting Fluid pressures lead to poor dynamic compensation: the result is relatively large actuation forces, since the closure piece due to its considerable dimensions in the direction of flow to a strong disturbance of this flow process leads. Another unfavorable side effect of this strong disturbance can be seen in the fact that it is difficult, on the one hand, to determine a given flow characteristic as a function of the position of the locking piece and the profile of the latter and, on the other hand, the exact To get positioning of this locking piece, the actuating force even a change of direction during one and the same opening and Can learn the closing path of the valve gate.

There is also the distance between the axis the actuating rod and the wall of this cavity in which the outlet opening is worked out is, is large, call the actuating force on the rod and the frictional forces of the locking piece on the Wall a considerable tilting moment and thus lead to increased risk of jamming this closure piece.

The measures according to the invention are intended to avoid these disadvantages. The invention proposes this a valve gate of the type mentioned, which is characterized in that the Verachlußstück the shape of a tubular sector with thin outer wall and an outer radius equal to that of the cylindrical Is cavity of the housing and cooperates with a part of the wall of this cavity, which is symmetrical

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extends on both sides of the outlet opening, wherein the inlet and outlet openings are on the same axis perpendicular to that of this cavity; and the Axis (T-T) of the operating rod is parallel to the axis (X-X) of the cavity, differs from the latter and in the immediate vicinity of the wall of this cavity in which the outlet opening is worked out is, is located.

In this way, a valve spool is obtained which slightly disturbs the flow of the fluid and in which the actuating forces are applied of the closure piece are considerably reduced.

Exemplary embodiments of the invention are intended will now be explained in more detail with reference to the accompanying drawings, in which:

Pig. 1 shows a section through a valve slide

of the invention along the diametrical plane of symmetry of the housing defined by d. Axis of fluid circulation goes;

Fig. 2 is a section through this valve gate

along line 2-2 in Figure 1;

Fig. 3 is a partial section through a modified one

Embodiment of this valve valve housing, along the same plane as in Fig. 1; the

Fig. 4 and 5 are corresponding representation, in section

and in the front view of a modified embodiment of a flow opening this Housing;

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Pig. 6 to 8 represent different profiles

for the lower part of the plug to control the flow; and the

fig. 9 and 10 are corresponding representations, each in longitudinal section and in FIG Top view of a modified embodiment of the closure piece.

The one in fig. 1 and 2 shown valve gate valve comprises a housing 1 and a locking piece 2 on which an actuating rod 3 is attached.

The housing 1 is made of metal, is parallelepiped-shaped and has a cylindrical cavity 4 of the axis X-X, which is taken vertically, on and by which it is penetrated on both sides. The diameter of the cavity is much smaller than its length and its open ends are tight closed by a lower cover 5 and an upper hat 6. The side wall of the housing 1 is penetrated by two circular openings 7 and 8, each of which is the inlet and outlet of the liquid or gaseous fluid; the opening 8 is threaded. These openings 7 and 8 from the same axis T-rY perpendicular to axis X-X have one and the same diameter corresponding to that of a line indicated by dash-dotted lines, whose two elements A and B are intended to be attached to the housing 1 in any known manner. The openings 7 and 8 are above the lower cover 5 in the lower part of the body worked out. The cap 6 has a cylindrical

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Outer projection 9 on the hole of an elongated 10 is penetrated, which ends at its lower end in an opening 11 of smaller diameter. The common axis T-T of the hole 10 and the opening 11 lies parallel to the axis Σ-Σ and differs from the latter, however. The projection 9 has external thread.

The closure piece 2 is made of metal in the form of a tubular sector of thin approximately semi-cylindrical wall with an outer diameter that is the same that of the cylindrical cavity of the body 1 is. It's halfway up with a one-piece herewith produced Torsprung 12 provided and parallel to Wall of the closure piece from a threaded hole 13 interspersed.

The actuating rod 3 is cylindrical in shape and of the same diameter as the opening 11 of the Cap 6 and has in its lower part a throttle point 14, which is provided by a threaded Part 15 is extended. The rod 3 passes through the opening 11 and is guided tightly in the hole 10 by a sealing arrangement 16 which is held by a cap 17 through which the rod 3 also passes and is screwed onto the protruding part 9. The end 15 of the rod is screwed into the projection 12 of the closure piece and the cap is in one Angular position arranged in such a way that the axis of this rod meets that of the opening 7 and 8. That Verachlufistück 2 then extends symmetrically to both sides of the Y-Y axis; us its outer wall interacts with the recess 4 of the housing 1, which this

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serves as a seat! together; the operating rod 3 is practically in contact with the inner wall of the lock thick.

You outlet opening 8, which from the closure piece 2 is acted upon is with a metallic planar, so-called sound-absorbing grille 18 provided, which is fastened by screws perpendicular to the flow axis Y-Y.

The working principle of the valve gate valve described in this way is as follows

The actuating rod 3 can be translated according to its axis by hand, mechanically, pneumatically, hydraulically or electrically via known, Devices not shown are operated to the locking piece 2 in vertical translation to move between a closed position shown in Fig. 1 and a total open position shown in phantom in Fig. 1.

The fluid circulates in the direction of arrow f.

In the closed position of the closure piece when the fluid pressure on the inflow side, d. that is, higher on the side of the inlet opening 7 than on the downstream side on the side of the Is outlet opening 8, the difference in fluid pressure between the inflow side and the outflow side or acts the differential pressure on the concave surface of the closure piece 2 and acts on its convex surface at the outlet opening 8 and on the latter adjacent part of the cavity 4. Thanks to the constricted

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Part 14 of the actuating rod 3 this has a certain flexibility, which the tight pressing of the closure piece under the influence of the fluid * pressure against the wall of the cylindrical cavity of the housing 1 and in particular against the Opening 8 allows.

If the closure piece 2 is raised into a position with partial release of the opening 8, so its lower flat section delimits a passage cross-section with this circular opening, which exactly determines the desired throughput of fluid circulation. Due to the small thickness of the closure piece 2, the fluid flow is only slightly disturbed, since this closure piece is only one The obstacle that takes up little space in the cylindrical cavity of the housing 1 is: the closure piece namely almost coincides with the wall of the cavity of the body 1 on which it is pressed.

The passage is in the fully open position completely free and the fluid outflow is direct between openings 7 and 8.

When this locking piece 2 is actuated, the pulling or pushing action of the rod 3 comes into effect in accordance with its axis T-T, which is located near the rear wall of the housing 1. Because of the small distance between this axis T-T and the wall of this Housing 1 is the tilting moment of the closure piece due to this actuation force and due to the The protruding arrangement of the locking piece 2 on the rod 3 is very slight, which means that there is a tendency for the singriff of the locking piece in the opening 8 and jamming

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this closure piece can be avoided and friction phenomena of the closure piece against the wall of the cylindrical cavity of the housing 1 can be reduced.

You actuation force of the locking piece 2, which is a function of the coefficient of friction of the locking piece in the housing 1 and the difference Pressures between the upstream and downstream sides or the differential pressure is low. Comparative tests have shown that under an operating pressure of 5 bar this force is of the order of magnitude of one tenth of what is necessary for a cylindrical slide lock piece, which would be operated by an operating rod from the X-X axis.

According to its simple geometric shapes, the valve gate valve can be adapted to various uses. Thus, due to the symmetry of the axis X-X of the cylindrical cavity of the body 1 and the inlet and outlet openings 7 and 8 ^ if the The direction of fluid circulation is reversed (flow opposite to f) using the same valve slide by turning it by 180 ° around the axis X-X the arrangement is rotated, which is formed by the top hat piece 6, operating rod 3 and Closure piece 2. The latter then lays on the opening 7, which, like the opening 8 for receiving the grille 18, are then provided with an internal thread can. This divides the total fluid throughput into a large number of partial or elementary throughputs, which attenuates the flow noise.

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In the case of a pneumatic single-acting actuation of the actuating rod 3, under elastic Spring return in the initial closed position enables the easy replacement of cover 5 and Hat training 6, with the lid 5 in the upper Position and the cap 6 reaches the lower position, it, the valve slide, which due to the lack of drive fluid closes to be transformed into a valve gate valve, which is due to the lack of a drive fluid opens. In other words, instead of a spring return To have it in the closed position, you have a spring return in the open position.

The low value of the operating force; the low level of frictional forces and the lack of jamming of the plug 2 as well as the ease of flow control or adjustment this valve gate valve is particularly suitable for mechanical, hydraulic, pneumatic or electric servo actuation. It should also be pointed out that this valve slide is of a particularly simple construction and facilitates assembly and disassembly,

I _n Fig. 5 is a variant of the section of the flow cavity 4 of the housing 1 between the openings 7 and θ shown. The lower cover 5 has a bulged lower concave side 19 of a diverging-converging design in relation to the direction of flow in the sense of f. The bulged profile facilitates the outflow in that the eddies in the lower part of the housing 1, which generally adjust for the small degrees of opening of the closure piece 2, are omitted.

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If you want the mentioned advantages of reversibility in use by rotating the cap 6 by 180 ° and / or exchange of cover 5 and cap 6 retained, so it is necessary that the cap is an analog Has profile on its inner surface. In addition, it is necessary that this curved profile on both the cover 5, as on the cap 6, is not exactly at the circular inner edge of the opening 8 on the outflow side is connected, but a free space 20 for the closure piece is cut out to allow this to his in fig. 3 to reach the closed position shown. With the profile shown, if the direction of flow is changed, it would be necessary for this reason to provide a rotation of the lid 5 by 180 ° simultaneously with the rotation of the cap 6.

In FIGS. 5 and 4, an opening 8 provided with two inclined incisions 21 is shown, wherein the incisions in the wall of the cylindrical cavity 4 of the housing 1 are provided. These incisions 21 are arranged diametrically opposite one another with respect to the flow axis Y-Y and are located at the top and bottom of the opening 8. They are corresponding to an angle x, for example on the order of 10 ° based on the Generating the cavity 4 beveled. They can have a cylindrical surface and so by milling or they can be made of leather with a central sloping edge at angle ζ, the latter being in the plane of the axes X-X and Y-Y is located.

The purpose of the incisions 21 is to distribute the contact pressures of the closure member 2 and the housing 1

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to improve it, become more uniform during the sliding movement of the locking piece let and still reduce the dangers of the locking piece jamming in the opening 8. Of course, the opening can also be analog Have incisions 21.

Flg. 6 to 8 different embodiments for punching or cutting out the lower Section of the closure member 2 given, which allow certain characteristics of the change of the flow as a puncture of the more or less large opening position of the closure organ as well as for to obtain a constant pressure loss of, for example, 1 bar.

Thanks to the thin wall of the closure member 2, which localized the influence of the pressure loss, the profile of the lower portion of this closure member can be examined and calculated with greater accuracy for a desired flow characteristic. In particular, when the lower portion of the closure member 2 is straight (Fig. 1), the flow characteristic is a function of the lifting of the ' closing organs essentially linear; to obtain flow characteristics that are non-linear, the lower portion of the closure member 2 is cut in a manner known per se according to a special profile. The triangular profile of Fig. 6, the profiles with one and two arcs of FIG. 7 and are examples of this punching. Identical profiles can be given to the top of the closure member, in order to achieve the above-mentioned reversibility with the same

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- Ensure 12 flow characteristics.

In the pig. 9 and 10 of the drawings is a variant of a plug 22 made of plastic material, Plastic material shown. The closure piece is also in the form of a tubular sector; at the same outer radius, however, it is thicker than the closure piece 2 of the Pig. 1 and 2. Eb includes longitudinal recesses 23 and a threaded hole 24 for fastening the threaded end 15 of the actuating rod The closure piece 22 can of course have one end surface or two, as with above Regarding the Pig. 6 to β set out, is profiled.

Other embodiments, not shown, can also be considered. Thus, the actuating rod 3 can also not have a constricted cross section 14, but rather on the closure member be fastened with its lower end by means of a floating bearing known per se, d. H. by a cylinder collar or a bone or ball joint at the end of this operating rod, which is below Play engages in a cylindrical bearing from the axis T-I, which is machined in the locking member or in the projection 12, if one exists is. The closure member can also have a certain number of small slits or smaller ones in its lower part Have passage openings for the pluid, which are exposed to the extent of the opening and how the grid 18 serves to subdivide the total amount into partial amounts and thus the flow noise to reduce.

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Finally, various parts of the valve gate valve can be provided with a plastic coating or a mineral coating be or can be formed at least partially from plastic materials or plastic material be.

CLAIMS - U -

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Claims (8)

- 14 CLAIMS 1. ) Faucet valve with a housing with a Eren cylindrical cavity with fluid inlet opening and fluid outlet opening and a closure member which is translationally perpendicular to the axis of the exit opening under the action of an actuating rod attached to this closure member, characterized in that the closure member (2) has the shape of a tubular sector with a thin wall of an outer radius which is identical to that of the cylindrical cavity (4) of the housing (1) and cooperates with part of the wall of this cavity, which extends symmetrically on both sides of the outlet opening (8), the inlet (7) and outlet openings (8 ) of the same axis perpendicular to that of the cavity sLnd and the axis (TT) of the actuating rod (3) parallel to the axis (ZX) of the cavity and different from the latter and in the immediate vicinity of the wall of this cavity in which this outlet is worked out is arranged. 2. Faucet slide according to claim 1, characterized in that the closure piece (2) is approximately is semi-cylindrical and cooperates with approximately half of the circumference of the recess (4). 3. Faucet slide according to one of claims 1 and 2, characterized in that the actuating rod (3) in the vicinity of their attachment point on the 509813/0301 -15- echlußorgan (2) has a constricted part (14). 4. Faucet slide according to one of claims 1 to 3, characterized in that the cavity (4) in the longitudinal direction is limited by a cover (5) and an exchangeable sap (6), the actuating rod (3) the cap (6) penetrates. 5. valve gate valve according to claim 4> characterized in that the inside of the cover (5) of is divergent-convergent shape in the direction of flow. 6. valve gate valve according to claim 5 »characterized in that the inside of the cap (6) also is of a divergent-convergent shape in the direction of flow. 7. valve slide according to one of claims 1 to 6, characterized in that the outlet opening (8) on the side of the cavity (4) has two inclined, opposing incisions (21). 8. valve gate valve according to one of claims 1 to 7, characterized in that a grid (18) in the Outlet opening (8) is mounted perpendicular to the axis of this opening. 5098 1 3/030 1