DE2748143A1 - VALVE - Google Patents

Description

7> October 1977 2748143 D 5589 - iusp

I'esto machine factory Gottlieb Stoll, 7300 Eßlingen / H

Valve

The present invention relates to a valve with a rotary lever, between which the Schließetellun-g and the open position corresponding positions, there is a 90 ° angle, and with a rotary lever and a receiving of this actuatable closing member housing from a medium in question receiving recess is traversed.

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Such valves are in the form of shut-off organs Ball valve or plug valve known in which a 90 ° rotary movement is sufficient to open or close the valve. Such quick-acting valves are used in a variety of ways. A disadvantage of them, however, is that the valve body and valve seat relatively accurate to avoid leakage must be coordinated and processed. Since when the valve is operated there is a sliding friction between the valve body and its seat, such taps do not have a very long service life. Furthermore, all parts must such taps are matched to the respective medium to be shut off with regard to their choice of material.

An object of the present invention is to provide a valve of the type mentioned, which in a simpler and can be manufactured inexpensively.

To solve this problem, according to the invention, in the housing recess an elastically squeezable hose is provided on which a pressure shoe designed as a closing element is attached acts, which is driven transversely to the longitudinal direction of the hose and in its lowest position an im causes substantial complete closure or squeezing of the hose.

The valve according to the invention is thus suitable as a small valve with few parts and can in particular also be used for corronding

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Media are used because the medium in question is practically only in contact with the hose inserted in the housing comes. Accordingly, only this needs to be made of a resistant plastic, for example polyurethane. Furthermore, the production is considerably simplified, since no fine machining of valve seats and the like is necessary and since no separate seal has to be provided. In particular, there is no post-processing on the valve or on its parts or the like necessary. Since there is no sliding friction due to the construction, the expected service life is also of the valve according to the invention increased significantly, because there are practically no elements present that a subject to premature wear. The inventive Valve therefore has no sealing problems either.

In a preferred embodiment of the present invention, the valve housing is made of two half-shells, between which the hose, the rotary lever and the pressure shoe are inserted. This simplifies the production very substantially and results in a very cheap, disposable item Valve. Since the individual parts can simply be inserted or plugged into the half-shells, with no seals must be made, there are no tight manufacturing tolerances to be observed in the manufacture of the individual parts. All Parts are expediently made of a preferably relatively simple and inexpensive plastic from injection-molded or injection-molded part manufactured. The valve housing is preferably in a direction parallel to the direction of displacement of the pressure

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shoes and separated to the longitudinal direction of the medium flow, which creates a larger welding surface, since the two half-shells are welded together after assembly at their separation point , and has the further advantage that no forces can act on the separation surface when shutting off. Further advantages arise in connection with the guidance of the rotary lever and pressure shoe in the housing.

The conversion of the 90 ° rotary movement of the rotary lever into an axial sliding movement of the pressure shoe from its open position above the hose into its closed position squeezing the hose or vice versa can take place in a variety of ways. In an embodiment according to the invention it is provided that the two adjacent surfaces of the pressure shoe and the rotary lever have a tendency to slide axially, the pressure shoe being guided axially. Depending on the size of the inclination of the contact surfaces , a more or less large closing path can be overridden during the 90 ° rotary movement. But it is also possible to create this conversion alone or in addition via a type of screw-thread connection. For this purpose, the rotary lever or the relevant part of the housing has a pin and the other part has a thread in the form of a groove which is inclined to the axial displacement movement. Both the pin and the groove can be molded or molded on the relevant part. If the pin is formed on the rotary lever, it is expedient to form the groove in only a half-shell so that the burrs that may be present on the parting plane do not interfere. The groove is expediently in the horizontal at both ends

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bent over so that the end positions of the rotary lever are thereby determined. The groove closed at both ends is also ensures that the rotary lever can no longer fall out after the individual parts have been assembled.

It goes without saying that, in order to achieve a lower friction, the pin can also be replaced by a ball and that the definition of the end positions can also be done in a notch-like manner. It is also possible to do both types of the above Provide motion conversion and add or subtract the two motion ratios, but not it is necessary to equalize the inclination of the contact surfaces and that of the thread groove.

In the housing recess there is expediently a bottom-side, Provided bulge protruding into the recess, which, in order to prevent pinching over the entire cross-section of the To enable the hose to run horizontally over the entire diameter. This curvature on the bottom comes from the pressure shoe counteracts and enables a simple and good shut-off of the hose. The pressure shoe can expediently be slightly convex, which area corresponds approximately to the facing outer surface of the squeezed-off hose.

Further details and embodiments of the invention can be found in the following description in which the invention is described and explained in more detail with reference to the embodiment shown in the drawing.

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It show: * Λ

Fig. 1 is a longitudinal section through a valve according to a Embodiment of the present invention in the open position,

Pig. 2 shows a section along the line II-II of FIGS. 1 and

Pig. 3 shows a section similar to FIG. 2, but in a closed off Position of the valve.

The valve 11 according to the invention is in the manner of a quick-acting valve built up, in which already with a 90 ° rotation its actuating member 26 a shut-off of a medium flow takes place. The valve 11 is for almost all types suitable for media, regardless of whether they are liquid or gaseous, and regardless of whether they are aggressive or not.

The valve 11 according to the invention has a housing 12 which is composed of two half-shells 13 «14- which are shown in FIG their essential shapes, in particular in their outline shapes, are identical. The two half-shells are 13 * 14 made of a suitable, inexpensive plastic as an injection-molded part or injection-molded part. How to show will be, the two half-shells 13 »14 in accordance with the Drawing in the assembled state at their adjacent edges forming the housing parting plane 16 welded

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In the assembled state, the housing 12 has a continuous horizontal bore 17, which is parallel to the parting plane 16 runs and is divided by this, so that each of the two halves of the bore, which have a semicircular cross-section, are formed is formed in a half-shell 13, 14 each. How in particular from j.ig. 1 can be seen, has the bore 17 in Area of the longitudinal median plane marked by the cutting line, that is, transversely to the parting plane 16, a bottom-side, forinte curvature 18 which protrudes into the bore cavity. This curvature 18 runs in the direction of flow A and in the opposite direction dome-like and has a height of about 1/4 to half the radius of the horizontal bore 17 The pronounced apex of this bulge 18, which is provided with a certain width, runs horizontally and takes a length a, which corresponds to the diameter of the bore 17.

A hose 21, the outer diameter of which corresponds to the inner diameter of the bore 17, is inserted into this bore 17. The tube 21 can be squeezed together elastically and is therefore made of a plastic suitable for this purpose. In the case 12 hoses 21 made of different materials, in particular plastics, can be used, depending on which one Medium the valve 11 according to the invention is to be used. For example, if it is an aggressive medium, so an appropriately resistant plastic must be selected for the hose. The length of the hose 21 is preferred chosen so that it protrudes on both sides over the housing 12,

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so that nipples or the like at its ends can be attached to attach the relevant line ends.

Opposite the curvature 18 in the bottom of the horizontal bore 17 arranged in the lower region of the housing 12 is a circular recess 22 running perpendicular to the bore 17 , which is accessible from above the housing 12 and which opens into the bore 17. This recess 22 is also arranged in such a way that it is divided into two semicircular recesses by the parting plane 16 of the housing 12, one of which is molded into one of the half-shells 13 and 14 . In the circular recess 22 is a pressure shoe 23, which rests with its front free end 24 from the outside of the hose , and a lever 26 with its leg 27, which acts on the pressure shoe 23 such that when turning the right-angled lever 26 on his Actuating leg 28 of the pressure shoe 23 is displaced in the direction of the recess 22 towards the hose 21 or away.

The pressure shoe 23 has the pig in longitudinal section. 1 , an approximately triangular front end 23, the pressure surface 29 of which is provided with a width corresponding to the hose diameter, however, as can be seen from the cross section of FIG. 2 or 3, is convex. The rear end of the pressure shoe 23 is provided with an inclined surface 31 which is at a certain angle to the longitudinal axis of the recess

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runs. An inclined surface 32 of the lever arm 27, which is provided with the same inclination, rests on this inclined surface 31. For its axial guidance in the recess 22, the pressure shoe 23 has a guide strip extending approximately over its length 23, which is in a vertical groove 34- in one half-shell 14 intervenes. As a result, the pressure shoe 23 cannot be rotated, but held displaceably in the direction of the hose 21 .. On the lever leg 27 is at a suitable point on the outer circumference and formed from this protruding a pin 36, the engages in an inclined groove 37 which is molded into the half-shell 13 is. The inclined groove 37 is designed in the manner of a thread turn and has a corresponding pitch, whereby it but only over an angular range of 90 and here runs exclusively in the half-shell 13. At its ends, the inclined groove 37 is bent in the horizontal direction, so that the end positions of the pin 36 and the lever 26 are set. The slope of the inclined groove 37 can be smaller or greater than the slope of the inclined surfaces 31 »32. The inclined groove 37 has the effect that the lever 26 is moved axially in the recess 22 when it is rotated. So that this axial movement is possible with the rotary movement, the actuating leg of the lever 26 is in the open starting position shown in FIG. 1 arranged at a certain distance from the upper end of the housing 12.

The function of the valve 11 is as follows: When the valve 11 is based on the open position shown in FIG If the lever 26 is pivoted according to arrow B, the lever 26 is moved

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due to the engagement of its pin 36 in the inclined groove 37 and the pressure shoe 23 due to the axial and the rotary movement, in the latter case due to the abutting sloping surfaces 31 »32 down towards the hose 21. After a turning movement of 90 °, the pressure shoe 23 takes the one shown in FIG A closed position in which its front pressure end 24 has squeezed the tube 21 in the area in which the Bore 17 is provided with the bulge 18. As can be seen from Fig. 3, the pressure surface 29 is convex in shape, in which the hose 21 is squeezed together. Since the apex 19 of the bore bulge 18 over the entire diameter runs, it is ensured that the squeezing of the hose 21 takes place optimally, i. i.e. that the line for the Medium is completely blocked. If the lever 26 is rotated in the opposite direction to open the valve 11, so if this is forced to move (due to pins 36 and Inclined groove 37) back to its original position, while the pressure shoe 23 due to the inherent elasticity of the hose and the medium flowing through or flowing through again is pushed back into its original position. In the illustrated embodiment, the sliding movement is superimposed of the pressure shoe 23 due to the rotary movement of the lever 26, two axial sliding movements, namely the one caused by the combination of pin and inclined groove, and that which is brought about by the combination of the two inclined surfaces 31, 32. In theory, these movements can not only add but also subtract. It is therefore, for example, too possible to make the oblique groove horizontal, so to set the lever axially, so that the axial displacement of the

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Pressure shoe 23 is brought about exclusively by the interaction of the inclined surfaces 31 »32.

For the displacement movement of the lever 26, instead of the pin, a ball can also be used to reduce the friction that occurs will. It is also possible to work the inclined groove into the lever arm 27 and the pin either to the half-shell 15 or 14 or as a pin through a hole to insert in the Iialbschale 13 or 14 and then this read weld.

The valve 11 according to the invention can be produced in a simple manner and grounded together. All individual parts, such as the two half-shells 13 »14, the pressure shoe 23 and the lever are made of plastic, for example, as an injection-molded part or injection-molded part with the projections and recesses provided in each case manufactured. The hose is then placed in one of the half-shells 13, 14 21, which may be commercially available, the pressure shoe 23 and the lever 26 inserted and. then the other half-shell 13 is placed on top. The two calf shells 13 »14 are then welded to one another over a large area along the parting plane 16. After this Kentage are both the hose 21 and the pressure shoe 23 and levers 26 set within housing 12 so that they cannot fall out. This assembly, in which the recesses can be produced in a simple manner and in which the pressure shoe 23 and / or lever 26 is already in the a half-shell is or are set at least suitable for assembly, is on the vertical separation of the housing

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in the two half-shells . In addition, there is the advantage of the large welding surface and the simple production of the tools for the injection-molded parts and the injection-molded parts themselves, the latter being able to take place without post-processing.

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Claims (1)

October 7, 1977 - iusp Festo-IIaschinenfabrik Gottlieb ötoll, 7300 üßlinr-en / Il Valve Expectations Λ J valve with a rotary lever, between whose positions assigned to the closed position and the open position there is an angle of 90 °, and with a housing which accommodates the rotary lever and a closing element actuated by this and which is traversed by a recess which accommodates the medium in question, characterized in that an elastically zusammenquet schbar ei ¹ hose (21) provided in the Gehäuceausnehmung (17) to the designed as a Schließclied pressure shoe (2 $) acting transversely to the Schlauchlän ^ srichtune displaceably 909818/0208 -? - driven ict and in its lowest position causes an essentially complete closure or squeezing of the hose (21). 2. Valve according to -tinc ^ ruch 1, characterized in that the valve housing (12) consists of two half-shells (13, 14), between which the hose (21), the rotary lever (26) and the pressure shoe (2Ij) are inserted. 3. Valve according to claim 2, characterized in that the valve housing (12) is separated in a direction parallel to the direction of displacement of the pressure shoe (2 $) and in the longitudinal direction of the Iiediumflusses. 4. Valve according to claim 2 or 3 » characterized in that the two half-shells (13, 14) of the valve housing (12) are welded together. y. Valve according to one of the preceding claims, characterized in that for converting the rotational movement of the rotary lever (26) in the linear axial sliding movement of the pressure shoe (23), the two elements (23, 26) on parallel inclined to the displacement direction Gleitilächen (31 »32) anein lying differently. 6. Valve according to one of the preceding claims, characterized in that for converting the rotary movement of the rotary 909818/0208 - ί - hebeis (26) in the straight-line axial sliding movement of the Pressure protection (23) of the rotary lever (26) or the associated Housing part (14) has a 9 ° circumferential groove (37) inclined to the sliding movement and the other part engages in the hat (37) Pin (36), ball οά. Like. Has. 7- valve according to claims 5 and 6, characterized in that that the two sliding movements overlap. C. Valve according to claim 6, characterized in that the groove (37) runs in a spiral. 9 · Valve according to claim 6 or S, characterized in that that the two ends of the groove (37) in the horizontal direction run bent over. 10. Valve according to claim 6, characterized in that the pin (36) on the housing part (14) or on the rotary lever (26) is molded on. 11. Valve according to claim 6, characterized in that the pin (36) is a through the housing (12) inserted from the outside, pin held by welding. 12. Valve according to claim 10, characterized in that at a pin (36) molded onto the rotary lever (26) the circumferential groove (37) is molded into one of the two half-shells (13 »14). 13 · valve according to one of the preceding smells, thereby characterized in that the pressure shoe (23) on at least one 909818/0206 BATH ORIGINAL Außenemimfangsbereich one in a guide groove (34) one Half-shell (14) einreil ends in the direction of the sliding movement has running guide bar (33). 14. Valve according to one of the preceding claims, characterized in that the pressure shoe (23) occupies the entire hose width or diameter. 15. Valve according to claim 14, characterized in that the the free end (24) of the pressure shoe (23) is slightly convex. 16. Valve according to one of the preceding .Ansprüche, thereby characterized in that your free end (24) of the pressure shoe (23) opposite a concave bulge (18) in the housing recess (17) is provided over the entire hose diameter runs. 17 · Valve according to one of the preceding claims, characterized in that the housing (12) and the actuating members (23, 26) made of plastic injection or injection molded parts are. 18. Valve according to one of the preceding claims, characterized in that the hose (21) consists of one opposite the used Hedien resistant plastic material is. 909818/0206 19 · Valve according to one of the preceding claims, characterized in that the hose (21) projects beyond the valve housing (12) at both ends. 909818/0206