DE2723489A1 - PNEUMATIC DISTRIBUTOR WITH A DEVICE FOR MANUAL OPERATION - Google Patents

Description

Applicant; Societe Anonyme dite: La Telemecanique Electrique

Title: Pneumatic distributor with a device for manual operation

The present invention relates to a pneumatic distributor with a device for manual operation for the actuation of the movable component (s) of the distributor in order to restore the state in the event of a deliberate or accidental absence of normal control to have the movable component (s) changed.

The pneumatic manifolds to which the invention relates are either distributors with gate valves or distributors with valves. These devices are assisted in a known manner provided for manual operation, which generally consist of pushers, which are arranged at the ends or front sides of the distributor and to enable an adjustment of the movable component (s) (slide or valves) by means of thrust or pressure, to obtain a change in the state of the distributor in the absence of normal control signals. This manual actuation of the moving parts of a pneumatic manifold is currently

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■ * "· 2723439

the work processes pin adjustment and control of the pneumatic Device advantageous to which the distributor belongs.

However, these known manual operations or controls have numerous disadvantages. So it is in the course of their activity occurring stress and damage their ease of use. The reason for this is that in distributors the seals in use can be rubberized with sliders, which creates considerable friction, while in Distribute with valves the moving parts are not subjected to balanced loads.

On the other hand, the pushers for auxiliary manual operation are on separately arranged bases or on one another on their bases Easily accessible side by side assigned distributors. On the other hand, the frontal allocation of the distributors creates the advantage to facilitate the lateral arrangement of the connection openings in the base. With such an assignment the distributor is compelling the use of manual controls by means of pushers on the face - to be able to move them and to have access to them to have - to leave such a distance between the manifolds that the bulkiness in terms of length the system is contrary to the endeavor to miniaturize pneumatic devices.

The present invention intends to overcome these drawbacks, by having a distributor equipped with easily manipulated means for manual control of its operation

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suggests in which not only these means do not interfere with the group-wise frontal assignment of the distributors the base, but rather the one that occurs more and more frequently with these Constellations is also suitable to facilitate the operations to be controlled by means of manual operation.

For this purpose, the invention relates to a pneumatic distributor with a device for manual operation, which has, in particular, a body and at least one distribution device which, with the provided in the body and outside of the same opening inner canals cooperate 'movable in the body and under the action of a tax flow, the it is subject to changes in position with respect to the body is capable, wherein the control fluid from an external source through at least one control channel provided in the body in a control chamber of the distribution device can be fed.

According to one of the essential features of the invention, the control channel has a first one from the source to one located in the body Intermediate chamber leading part and a second part leading from this intermediate chamber to the control chamber on, wherein the intermediate chamber is continuously connected to a pressure medium source by an auxiliary line, while in the Auxiliary chamber movably housed distribution means, which in a first position establish a connection between the first and the second section and shut off the auxiliary line, in one second position, however, a connection between the auxiliary

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Establish line and the second section and thereby shut off the first section, accessible from the outside of the body and form the device for manual operation.

In a first embodiment, the distribution means are arranged in a slidable manner in the intermediate chamber designed as a bore Groove slide formed.

In a second embodiment, the distribution means are formed by a flap valve arranged in the intermediate chamber, optionally with a first seat through which the first section opens into the chamber, and with a second seat cooperates through which the auxiliary line opens into the chamber.

Further features and advantages of the invention emerge from the following description of the drawing, which is to be understood by way of example only.

Show it

1 and 2 are two schematic sectional views of an inventive Distributor,

3, 4 and 5 are views of variant embodiments of the means

for manual operation of the distributor according to the invention,

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6 is a view of another embodiment of the means according to FIG Figs. 3, 4 and 5 as well

7 shows a schematic view of a group-wise assignment of distributors according to the invention on the base.

From FIGS. 1 and 2, a distributor 1 can be seen in schematic cross section (FIG. 1) and in longitudinal section (FIG. 2), the is mounted in a known manner on a base 2, which inside a pressure channel P, an outflow channel £ and at least has a channel for supplying a control fluid χ. The distributor 1 is formed by a body 3 in which a movable distribution device is arranged, here in the form of a slide 4, which is slidably mounted in a bore 5. Of course, this movable distribution device also be a device with valves or any other known means, provided that it only ensures the distribution function.

For the sake of clarity of the drawing, these figures leave do not see the different inner lines in the body 3 and in the base 2, which the channels E and F with the bore 5 of the distributor and with outlet openings in the base, which are intended to be connected to devices of the to be connected to this distributor pressurized or controlled pneumatic system

You change of state of the distributor is done by controlling the moving has ensured β η device by means of a Druckflude.

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In the figures, a bistable distributor is shown, but the known case of a control of the movable Device 4 against a resilient return element are envisaged, the distributor then being monostable.

The tax flow is generally carried out by a (not shown) Source outside of the manifold into a control chamber 6, which is generally at the end of the movable device 4 lies. This supply can either via the base 2 through the aforementioned line and an inner line in the body 3 or by means of a solenoid valve indicated at 9 in FIG. 1 and an inner line 10 in the body 3 »its mouth with the outlet 9a of the solenoid valve corresponds.

In these figures it can be seen that only the line 8 is connected to the chamber 6. In fact, it can be assumed that the control fluid supply is effected via the base 2. In this case the conduit 10 is only one through a wall 11 closed preliminary stage of the final line. In the case of a distributor intended to receive a solenoid valve according to FIG the line 10, which is in communication with the chamber 6, while the line 8 is only a preliminary stage. The body 3 can thus have two line preliminary stages in such a way that only one is converted into a complete line by drilling whereby a wall like that mentioned at 11 is eliminated.

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Finally it can be seen that the illustrated bistable distributor a second control chamber 6a which is connected to a control fluid source by means of a line 8a similar to line 8 is.

The control line 8 acts with a device provided with the reference symbol 12 for manual operation of the distributor and an auxiliary line 13, which is continuously connected to the pressure medium source via the channel P. The Pig. 3 shows in on a larger scale, the arrangement of the various means to one another which form the manual actuation 12, as well as the functional parts Relationship that exists between these means and lines 8 and 13. To clarify the drawing are in this figure the lines 8 and 13 placed in the plane of the figure, while the line 13 and part of the line 8 are in the preceding Stretch figures in different levels.

The line 8 is basically formed by two sections, whose first H moves from the base 2 to one housed in the body 3 The intermediate chamber 15 and its second 16 extend from the chamber 15 to the control chamber 6. It also flows out the auxiliary line 13 by means of channels 13a, which are provided in a plug of the chamber 15, also in the chamber 15 · Die The mouth of the section 14 in the chamber 15 goes transversely through a seat 17 and that of the line 13a in the chamber transversely through a seat 18. A valve 19 attached to the end of a rod 20, the other end 21 of which is outside the body 3 Push button is provided, can optionally with the one

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or others of the seats 17 and 18 cooperate.

In the in Flg. 3 position shown dee valves 19, which by an elastic return member or spring 22 is secured, which is tensioned between the body and the push button, the line 13 is shut off at the level of the seat 18 of the chamber 15; the two sections 14 and 16 of the control line are in communication with one another.

In a second position of the valve 19t in which this is on the Seat 17 rests (a position that is obtained by manually pushing in the push button 21) is the part H blocked by the chamber 15 and the section 16 is connected to the line 13.

The movable parts 19 »20 and 21 form a manual operation device for the distributor. In fact, the Sections 14 and 16, when these parts are not acted upon, represent the control line 8 with the chamber 15, as they are for equipment a pneumatic distributor is known. Before the "normal" control of the distributor or in the case of the wanted one or accidental absence of control fluid in the device, the button 21 is operated by pressure. The from the channel P de Base or, more generally, pressurized fluid coming from the pressurized medium source of the device flows through the auxiliary line 13 to in the part piece 16 into it and feeds the control chamber 6. You actuation of the push button 21 has an effect that corresponds to that is identical, which is derived from the "normal" control of the

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plate shows what the desired result for a manual operation is. It should be noted that in the case of a too slow actuation of the movable parts, the Plude arriving through the line 13 not only through the line 16, but can equally flow through the line 14 as long as the valve 19 has not reached the seat 17. A reduction 13b of the line 13 avoids the escape in this case too much air through the control line H, which by definition is then connected to an outflow line which causes a pressure increase in this discharge line, which leads to the untimely control of the manifolds of the device can trigger whose control flow lines are connected to the aforementioned outflow line.

As can be seen, in the embodiment of FIG. 3, the button 21 must be kept pressed in to the chamber 6 below Hold pressure. This type of manual operation or actuation fits particularly well for bistable distributors, that is, through simple manual impulse can be reversed and then keep their new state.

If the manifold is monostable, it is desirable that manual operation should allow locking the respective position includes to the pressure in the chamber 6 and thus the state of the distributor if necessary to maintain.

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The variants of the Pig. 4 and 5 suggest solutions for a locked holding of the device for manual operation or actuation in the working position.

In Fig. 4, the button 21 connected to the rod 20 cooperates by screwing with a component 23 which has a thread is provided and connected to the body 3. Depending on the direction of rotation communicated to the knob 21, the line is shifted 20, i.e. of the valve 19, either in Direction of the seat 17 or in the direction of the seat 18. This Auegestaltung allows the valve 19 on one or the other to place and hold these two seats.

In FIG. 5, as in FIG. 3, the button 21 can be pushed in against the action of the return spring 22. He can too a rotary movement are caused by the interaction of mutually corresponding spiral cam surfaces 24, the on the base of the button 21 and on a piece 25 connected to the body 3 of the manifold, an axial displacement the rod 20 causes. This embodiment can function like that of FIG. 3 or like that of FIG. 4, i.e. like a push button in a stable position with locking options in a second position

Figure 6 is a schematic representation of another embodiment the means of distribution and optional connection

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application between the sections 14 and 16 of the control channel and the Auxiliary line 13, which are accommodated in the intermediate chamber 15. This chamber will be here from a bore and the funds formed by a groove pusher 26 which is slidably mounted in this bore. The free end of this slide 26 is with a Push button 27 is provided, which is similar to button 21 and is subjected to the action of an elastic return element 28 similar to spring 22 is. This elastic organ strives to hold the slide in a first position in which the sections 14 and 16 are in communication with each other while the auxiliary line 13 is shut off. In the second position this slide and which is obtained by pressing the button 27, the line 13 is connected to the section 16 and the section 14 is locked.

It is obvious that the operation of the slide with similar devices to those associated with the Pig. 4 and 5 can be obtained with the same references.

Finally, in Fig. 7 there is an assembly "in battery" before three Distributors 1a, 1b and 1c shown, which are combined on three bases 2a, 2b and 2c. Each socket is in a familiar manner from two lines E and P penetrated and has two outlet openings A and P, which are intended to the consumer of the acted upon or controlled by the corresponding distributor Facility to be connected. Each bistable distributor 1a and 1c has two devices 12a and 12b for manual

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rush to actuate, of which one recognizes only the control buttons. The distributor 1b is monostable and only has a single device 12 for manual actuation.

The configuration according to the invention is such that the devices are accessible for manual operation from the side of the flanks of the distributor that are parallel to the axis of its movable device run. In addition, they are arranged exactly in the perpendicular of each of the deferrals A and B. Ea is of it assume that the actuation of the device 12a of the distributor 1 a, the setting of the movable device in such Position has the consequence that the outlet port A is in connection with the pressure line P. Such a design as the one shown in this figure allows a quasi-automatic operation for the person performing the manual control process Association to achieve the desired result. The device according to the invention is therefore very easy to handle and practically does not involve any risk of mix-up and possible incorrect operation.

In addition, a distributor according to the invention offers numerous advantages, because it is simple and economical to manufacture due to the fact that it is advanced to an advanced level Can standardize stage of its manufacture. On this occasion one will look at the presence of line pre-stages like 8 and 10 (see Fig. 1), which e.g. when pouring dee Body are obtained, with the final bore depending on

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Weil creates the necessary distribution, depending on whether this is with a solenoid valve is provided or not.

The auxiliary chamber 15 can be used as such in all distributor bodies produced are provided and finally plugged by means of a plug, the outer dimensions of which are those of a device are similar to manual operation or actuation. The distributor 1b is therefore provided with a plug 29.

One of the advantages of the invention resides in the use of manifolds on pedestals with anti-backflow devices placed between the base and the distributor are arranged and make it possible to avoid disruptive back pressures when they occur in the facility may lead to untimely control of the distributor.

Indeed, these anti-backflow devices are simple enough to prevent Way, the adjustment of a component that the function of manual operation or actuation between the base and the Distributor ensures.

Finally, the distributor according to the invention is easy to use in terms of application and integrates in a rational manner into distribution battery facilities, the development of which is in full swing.

The invention has an interesting application in the field of pneumatic devices, in particular manufacturing

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and use of distribution organs.

It is not restricted to the preceding description but, on the contrary, includes all the variants that are added to it without leaving their framework or basic idea.

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Claims (9)

27234 3-9 claims 1. Pneumatic distributor with a device for manual ^ operation, the and at least, in particular a body a distribution device, which cooperates with those provided for in the body and outside it opens internal channels, movable in the body and under the action of a Steuerflude that they is capable of changes in position with respect to the body, the control fluid being feedable from an external source through at least one control channel provided in the body into a control chamber of the distribution device, characterized in that the control channel (8) is a first from the source has a section (14) leading to an intermediate chamber (15) arranged in the body (3) and a second section (16) leading from this intermediate chamber (15) to the control chamber (6), the intermediate chamber (15) being connected by an auxiliary line ( 13) is permanently connected to a pressure medium source, while movably housed in the auxiliary chamber te distribution means, which in a first position establish a connection between the first (U) and the second part (16) and shut off the auxiliary line (13), in a second position, however, a connection between the auxiliary line (13) and the second part ( 16) and thereby shut off the first section (U), are accessible from the outside of the body (3) and form the device for manual operation. 709850/0860 -16-. ORIGINAL INSPECTED 2. Distributor according to claim 1, characterized in that the distribution means are formed by a slidably arranged in the intermediate chamber (15) designed as a bore groove slide (26). 3. Distributor according to claim 1, characterized in that the distribution means are formed by a flap valve (19) arranged in the intermediate chamber (15), which optionally with a first seat (17) through which the first section (14) in the Chamber (15) opens, and cooperates with a second seat (18) through which the auxiliary line (13) opens into the chamber (15). 4. Distributor according to one of the preceding claims, characterized in that the distribution means are held in the first position by an elastic return member (22 or 28) braced between them and the body. 5. Distributor according to claim 4, characterized in that the distribution means can be locked in the second position. 6. Distributor according to one of claims 1-3 and 5, characterized in that the actuation of the distribution means between the first and the second position by a screw-nut system (21, 23) is ensured. 7. Distributor according to claim 5, characterized in that the Actuation of the distribution means by a peripheral in the body (3) 709850/0860 " ₁₇ _ · arranged and connected to these coats component ensured is that optionally against the action of the elastic organ in the sense of an axial sliding movement and by means of Curved surfaces (24) »which are provided coincidentally on the component and the body, in the sense of a helical one Rotary movement can be actuated, the component and the body in contact with one another through the elastic organ are held. 8. distributor with slide or with uniaxial valves according to one of the preceding claims, characterized in that the distribution means (19 or 26) are equipped with operating elements (21 or 27) which have a projection outside the distributor (1) in the plane represents one of its flanks, which is arranged parallel to the axis of the slide (4) or the valves. 9. distributor, which can be assigned to a mounting base "in battery" and has exit openings in the direction of the consumer, which are arranged on the same side and according to claim 7, characterized in that the operating elements on the distributor (1) are located on the same Side like the openings (A, B) and perpendicular to them. 709850/0860