DE1025694B - Electromagnetic valve control with three working positions - Google Patents

Description

GERMAN

The invention relates to an electromagnetic valve control with three working positions, which one, completes the pneumatic circuit in its first working position and; in her other two Working positions each connects with an inlet or with an outlet and those from their middle Final position by actuating one electromagnet each either in the inlet or in the outlet position can be brought.

In a known control system of this type, a single, with different control edges,-provided slide is provided ,, the, initial position, which may for example lead to a pneumatic circuit middle in one of its inlet or pressure port with respect to both sides of adjacent terminals, ah closes. The slide can be moved lengthways by means of two electromagnets from its two end faces into two further positions so that it has one connection with the inlet and the other connection with the outlet or to the. others the former. Connection with the drain and the second-mentioned connection with the inlet connects. The disadvantage of this control is that the individual, controlled by the control edges of the slide connection channels ¹ through the running surfaces between. The slide and the housing can only be imperfectly sealed and that, in addition, two helical springs whose characteristics are precisely matched to one another are required as a return.

The invention is based on the object of remedying the aforementioned deficiencies, and one, a pneumatic one To create circuit-connected valve control that is as simple as possible and works reliably even with higher pressure differences.

The task set is in accordance with the appointment essential, solved in that the valve control in other valve controls. himself, better known Way has two valves, each actuated by a joint on a common rocker arm, the Rocker arm between the two joints on a constantly biased in the closing sense of the valves Return part is pivotably mounted and its two outer ones, via the articulation points of the valves protruding ends are each hinged to a movable armature of the electromagnets and the rocker arm each time the one magnet is actuated around the joint in a known manner of the adjacent closed valve in the sense of opening the other valve against the force of the Return is pivotable.

With such a valve control, the two valves are used to complete the pneumatic circuit Elek.tromagnetis before valve control
with three working positions

Applicant:

Societe Francaise des Regulateurs
Universeis ARCA, Paris

Representative: Dipl.-Ing. R. Beetz, patent attorney,
Munich 22, Steinsdorfstr. 10

Claimed priority:
France June 17, 1953

Charles Trotin, Clamart (France),
has been named as the inventor

positively pressed against their valve seats, with which absolute tightness is guaranteed. In addition, the entire device only requires a single prestressed one Part whose preload ensures that the valves in the closed position in every installation position be kept securely closed.

In. the drawing illustrates the invention by way of example; it shows

Fig. 1 the valve control corresponding to the embodiment in a longitudinal section axially to the both valves,

Fig. 2 shows the valve control according to Fig. 1 in a cross section along the line II-II of Fig. 1.

The valve control has a base plate 1, on which an enclosing the individual parts of the control cylindrical housing 2 is placed, which is sealingly attached to the base plate by conventional means is.

In the housing 2, two electromagnets 3, 3 'are arranged on the base plate 1, spaced apart from one another and at the same time symmetrical to the longitudinal axis of the housing, the magnet cores 4 and 4' of which each interact with an armature 5 and 5 '. A threaded pin 6 or 6 'is attached to each of these anchors 5, 5'. These threaded pins 6, 6 'are each articulated via a pivot pin 7, T on the opposite outer ends of a rocker arm 8, which consists of two flat strips firmly connected by' intermediate webs 9, 9 'and is in its - central position horizontally above the two electromagnets 3, 3 'is located.

709 908/246

In. the middle of the Schwinghebeiis 8 is about a Bearing pin 10 mounted a threaded pin 11, which extends along the longitudinal axis of the housing 2 between the two electromagnets 3, 3 'extends downwards and there merges into a piston 12. This piston. 12 is in one on the base plate. 1 fixed Guide tube 13 is axially movably guided and is guided by an on the one hand on the upper side of the piston 12 and; on the other hand at an upper, screwed into the guide tube 13 termination plug 15 supported Coil spring 14 biased downward, which at the same time the rocker arm 8 as far as possible down against the two. Electromagnets. 3, 3 'pulls.

Between the bearing pin 10 and the outer pivot pin 7, 7 'are on the rocker arm 8 on both sides des Füh.rungs raw rice 13 via a further pivot pin, 16, 16 'and two valve rods 17, 17' articulated, between the guide sleeve 13 and the. Electromagnet 3, 3 'parallel to these after down, extend and on, their, lower. End each Have closure piece 18 or 18 '. These closure pieces 18, 18 'each work with a valve seat 19, 19 'together, which in turn each rest on a lower connection piece 20 and 20'.

The. Valve rods 17, 17 'enforce with their lower. Divide the base plate 1 downwards, with the space around these parts laterally by one down from the base plate 1 protruding pipe section 21 or 21 'and down through each one! screwed to the pipe section 21 or 21 'located above it, and at the same time, the associated Connection piece 20, 20 'retaining union nut 22, 22 'is complete. The locking pieces: 18, 18 ' have opposite the inner wall of the associated pipe section 21 or 21 'distributed along its circumference (not specially shown) notches or recesses so that they are in the open Valve position can be flowed around.

On the base plate 1, another connection 23 is provided. That the. Interior of the housing 2 connects to the pneumatic circuit (not shown), while of the aforementioned two connecting pieces 20, 20 'one (e.g. 20) is connected to a compressed air supply (also not shown) and the other (20') ) serves as an outlet into the ¹ free atmosphere.

The windings of the two electromagnets. 3, 3 'are in. That shown in Fig. 2. Way with connecting cables provided, which at sealed lead-through points 24, 25 and 25 'through the base plate 1 are passed and with a conventional, not shown and z. B. having a changeover relay. Control device are connected, from which alternately one or the other of the two Electromagnet 3, 3 'can be fed.

The valve control described works as follows: If neither of the two. Electromagnets. 3, 3 'is excited, the two locking pieces 18, 18' of the coil spring 14 from the Rocker arm 8 and the valve rods 17, 17 'are pressed against their valve seats 19, 19' and thus prevent them any inflow or outflow of compressed air through the two fittings 20, 20 '. So that too is Via the connection 23 to the interior of the device both connected pneumatic circuit blocked against a supply of compressed air as well as against an outlet of compressed air.

If, for example, the electromagnet 3 is fed, the magnetic core 4 attracts the armature 5 and acts thus a pivoting of the rocker arm 8 about the hinge pin 16 of the adjacent valve rod 17. In this with a simultaneous upward movement of the piston 12 against the force the spring 14 taking place pivoting of the rocker arm 8 is supported on the one hand, the valve rod 17 over the closure piece 18 against the valve seat 19, while on the other hand the valve rod 17 'on the Hinge pin 16 'is raised and thus the locking piece 18' lifts off the valve seat 19 'and the Release of compressed air from the connection piece 20 'into the open air. Since the piston 12 in the fixed Guide tube 13 is axially guided, the rocker arm 8 can move during the aforementioned pivoting movement move with its bearing pin 10 only in the axial direction of the threaded pin 11. Consequently the pivot pin 16 during the pivoting movement of the rocker arm 8 by one laterally offset by a small amount, but this does not affect the work of the valves, since the closure pieces 18, 18 'in the pipe sections 21, 21' with a corresponding clearance (e.g. by a system on only three points of contact).

If the electromagnet 3 is switched off again, the helical spring 14 pulls the piston. 12 back down and thus closes the. The valve controlling the exit of the compressed air into the open air again in that the closure piece 18 'is again pressed against the valve seat 19'. As can be seen from Fig. 1, the other valve also remains tightly sealed. If the electromagnet: 3 'is energized, the rocker arm 8 is pivoted around the pivot pin 16', the valve 18, 19 controlling the compressed air inflow now being opened in basically the same way as has already been described for the other valve. After the electromagnet 3 'has been switched off, the helical spring 14 again causes both valves ¹ to return to their closed position, as shown in FIG.

Claims (5)

PATENT CLAIMS: 1. Three electromagnetic valve control Working positions that complete a pneumatic circuit in their first working position and in. Their other two working positions each connects to an inlet or to an outlet and from their middle final position by actuating an electromagnet each in either the inlet or outlet position can be brought, characterized in that the Valve control two via one joint each (16 or 16 ') on a joint. Rocker arm (8) actuated Has valves (18, 18 ', 19, 19'), the rocker arm (8) between the two joints (16, 16 ') on a return part that is constantly preloaded in the closing direction of the valves (18, 18', 19, 19 ') (12) is pivoted and its 1x? Iden outer, via the articulation points of the valves (18, 18 ', 19, 19') protruding ends each to a Ικ-movable armature (5 or 5 ') of the electromagnet. (3, 3 ') are articulated and wherein the rocker arm (8) each time the one is actuated Magnets (3 or 3 ') around the joint (16 or 16') for the adjacent closed valve (18, 19 or 18 ', 19') in the sense of an opening of the other valve (18 ', 19' or 18, 19) against the force dor return (11, 12, 14) is pivotable. 2. Valve control according to claim 1, characterized in that the entire actuation valve control mechanism inside a closed, attached to the pneumatic. Cycle connected and an intermediate container forming housing (2) is arranged. 3. Valve control according to. Claim 1 or 2, characterized in that the return is a, in a cylinder (13) guided, under spring pressure (14) and preferably as a piston. (12) formed guide member (11) is. 4. Valve according to claim 1, 2 or 3, characterized in that the valve seats (19, 19 ') in a base plate (1) closing off the housing (2) and the locking pieces (18, 18 ') with it long valve rods (17 or 17 ') rigidly bound. are, in turn, via the adjustable pivot joints (16, 16 ') with the rocker arm (8) are connected.. 5. Valve according to claim 4, characterized in that the armature (5, 5 ') of the electromagnet. (3, 3 ') are connected to the ends of the rocker arm (8) via adjustable ¹ pivot joints (7, T) . Considered publications:
French Patent No. 959 149;
British Patent No. 445,351;
U.S. Patent Nos. 2,619,121, 2,633,871;
German patent application Sch 3908 XII / 47g. 1 sheet of drawings © 7C9 εαε / 245 ι.