DE1036062B - Control valve for alternating filling and emptying of work rooms - Google Patents

Description

The invention relates to control valves for alternately filling and emptying work spaces by means of valve bodies with two coaxial sealing surfaces lying in one plane, of which one cooperates with the valve housing, the other with a slide valve body, the latter at the end of its closing movement, the main valve body lifts off the valve housing seat.

In order to act on such valve-controlled working spaces in a double-acting manner, it has already been proposed been to use two such valve body sets, which are controlled by a control lever by means of corresponding Cam circuit or the like. Be operated alternately. The two valve timing sets are in two housed separate and parallel cylinder bodies, which are connected by cross lines are connected to each other.

Such arrangements are relatively expensive to manufacture. You do not assign the desired Simplicity, operational reliability and control options.

These disadvantages are avoided by, according to the invention, for double-loaded work spaces two valve body sets are provided that are coaxially and mirror-inverted to a center plane, in which the closing and opening movements of the yielding valve body and the slide valve body take place in the opposite direction and the two slide valve bodies become common Movement are interconnected in such a way that in each case one side of the work space to the common pressure medium access is connected and blocked with respect to the outlet, while at the same time the other side of the working space is connected to the outlet and opposite the pressure medium access Is blocked.

The two slide valve bodies are preferably connected by a common one, by the yielding one Valve body through rod connected to each other, and the space between them is connected to the pressure medium access. The distance between the two slide valve bodies is so long or kept so short that in the middle position both sides of the working area are set to "inflow" or »outflow« are switched on.

The coaxial arrangement of the double valves leads to a simple crowded and for the mechanical processing favorable tree shape of the valve body and a favorable connection option for the pipelines, which are advantageously laid in one plane and with parallel axes can. In addition, the coaxial design enables a significant simplification of the movement devices, which are practically in a single Control valve for alternating filling and emptying of work spaces

Applicant:

Maschinenfabrik Gustav Strunk G.m.b.H., Essen, Raadter Str. 11

Dipl.-Ing. Joseph Pfeiffer, Essen,
has been named as the inventor

continuous rod. This also provides a safe and easy way to adjust the two Valves reached to each other.

Further features of the invention emerge from the description of an exemplary embodiment of the invention. In the drawing shows

1 shows a central section through an embodiment of a valve body seat for a working space, 2 shows a central section through a double arrangement of a valve body set for double-acting occupied work rooms.

In the embodiment according to FIG. 1, the valve housing body 1 is provided with a pressure medium access 2 and a connection opening 3 is provided for the work space. The former opens into a piston chamber 4 in which a valve body 5 sealed on the circumference by collars or in some other way is axially displaceable is. Its end face is provided with a sealing washer 6, the outer edge zone 7 of which cooperates with a counter surface 8 of the valve housing body 1 and its inner edge zone 9 with the end face 11 of a slide valve body 12 cooperates. The latter is through its center pole 13 guided in a sealed manner in the valve housing 1 and moves in an upstream piston chamber 4 Vestibule 14. The yielding valve body 5 is provided with a central bore 15 and on the right Lateral outlet openings 16 are arranged from the opposite surface 8 and lead into the open air. Between the The right end wall of the valve housing and the yielding valve body 5 is a coil spring 17 arranged.

In the arrangement according to FIG. 2 intended for a double-acting working space, the connection opening is 3 intended for one side and the connection opening 3 'for the other side of the working space. The piston chamber 4 is yielding to the two

»09 5ÄV190

associated with the valve bodies 5 and 5 'together. The common pressure medium access 2 is connected to it. The two slide valve bodies 12 and 12 'are characterized by their one-piece rods 13, 13 'connected to one another, which pass through the space 4. In the position shown, the Parts is the connection opening 3 via the space 4, the passage opening 15 and the space 14 with the Pressure medium access 2 connected, while the connection opening 3 'on the other side of the working space via the vestibule 14 'at the outlet 16'. If the rod 13 is moved to the right in the direction of arrow 19, so the connection opening 3 is placed on the outlet 16 and the pressure medium access by placing the Sealing surface 11 blocked on the seat 9. On the other hand, the connection of the Pressure medium access 2 made via the piston chamber 4 after the connection opening 3 ', with under system the outer edge zone 7 'to the opposite surface 8', the space 14 'is blocked off from the outlet 16'.

Claims (5)

Patent claims: 1. Control valve for alternating filling and emptying of work spaces by means of valve bodies with two coaxial sealing surfaces lying in one plane, one of which with the Valve housing, the other cooperates with a slide valve body, the latter on At the end of its closing movement, the main valve body lifts off the valve housing seat, characterized in that that for double-acting working spaces, two coaxial and mirror images of a center plane are arranged Valve body sets (5, 5 ', 12, 12') are provided in which the closing and opening movements the yielding valve body (5, 5 ') and the slide valve body (12, 12') in opposite directions Direction take place and the two slide valve bodies (12, 12 ') move together are connected in such a way that in each case one side of the work space to the common Pressure medium access (2) connected and blocked with respect to the outlet (16) while at the same time the other side of the working space connected to the outlet (16 ') and opposite the Pressure medium access (2) is blocked. 2. Apparatus according to claim 1, characterized in that the two slide valve bodies (12, 12 ') through a common one passing through the yielding valve body (5, 5') Rod (13, 13 ') are connected and the space between them to the pressure medium access (2) is connected. 3. Apparatus according to claim 1 and 2, characterized in that the distance between the two slide valve bodies (12, 12 ') is kept as long or as short. that in the middle position the two Sides of the working area are switched to "inflow" or "outflow". 4. Apparatus according to claim 3, characterized in that the mutual distance of the two slide valve bodies (12, 12 ') z. B. is adjustable by a screw connection. 5. Device according to one of claims 1 to 4, characterized in that the outer, with the valve housing (1) cooperating edge zone (7) of the surface the working space against the Outlet (16) shut off, while the inner, with the slide valve body (12) cooperating inner zone (9) of the surface an opening (15) of the yielding pressure medium inlet (2) leading to the pressure medium Locks valve body after the working space. Considered publications:
German patent specifications No. 685 941, 814 818. 1 sheet of drawings © 809 580/190 7. 5 &