DK149500B - ELECTROMAGNETIC ADJUSTABLE 3/2-ROUTE VALVE, ISRAELY FOR REMOTELY CONTROLS UNIALLY WITH A FLUIDUM POWERFUL DEVICE - Google Patents

Abstract

1. An electromagnetic 2/3-way valve, especially for the remote control of fluid operated devices, comprising a valve housing (1) having arranged therein a valve chamber (11) which is open at one side and which is connected through a first passage (12), with a pressure conduit (P) and, through a second passage (13), with an operational conduit (A), the end of said first passage (12) which is located within said valve chamber (11), being formed as a first valve seat (14), further comprising an upper valve component closing the open side of said valve chamber (11) and rigidly connected to said valve housing (1), said upper valve component including an outer guide tube (2) which, at one end thereof, is inserted in said valve housing and which, at its end facing said valve housing (1), is integral with a connecting device (2a), and including a head piece (3) through which a return passage (R) leads to the outside, further comprising a magnet coil (8) the outside of which is surrounded by a magnet yoke (9) having its ends in contact with said head piece (3) and said outer guide tube (2), respectively, and further comprising a movable inner valve part (5, 6) arranged within said outer guide tube (2) and including a magnet core (5) and a valve plate (6) at the end thereof facing said first valve seat (14), said inner valve part (5) being retained, under the action of a compression spring (7), in a position in which said valve plate (6) bears against said first valve seat (14), said valve being provided, within said outer guide tube (2) and coaxial therewith, with an inner tube (4) which, at one end, is connected to said return passage (R), and the other end of which is formed as a second valve seat (15) and is located opposite said first valve seat (14) at a predetermined distance therefrom, and in which valve said inner valve part (5, 6) is formed as a hollow-cylindrical component arranged between said outer guide tube (2) and said inner tube (4), said component acting as a magnet core and being provided with openings (16, 16a) connecting said valve chamber (11) with the interior of said component, whereby said valve plate (6, 6a) which is effective on both sides, is arranged in such a way that it bears against said second valve seat (15) upon displacement of said magnet core (5) against the closing force of said compression spring (7) by a predetermined stroke length, characterized in that the upper end of said outer guide tube (2) is connected to said head piece (3) within said magnet coil (8), whereby an upper section (2c) of said guide tube (2) facing said head piece (3), consists of non-magnetizable material, whereas a lower section (2b) of said guide tube (2) facing said connecting device (2a), consists of magnetically conductive material, that said openings are formed as slots (16, 16a) arranged directly adjacent the end of said inner valve part (5, 6) facing said valve chamber (11), and that said valve plate is a sealing plate (6, 6a) made of elastic material.

Description

149500 i

The invention relates to an electromagnetically adjustable 3/2-way valve, in particular for remote control of fluid-responsive devices from one side and of the kind specified in the preamble of the claim. Said devices are e.g. membranes, cylinders, pressure amplifiers, etc.

Valves of this construction have the property that the first valve seat at unmagnetized solenoid coil is closed by the valve plate and that the working connection is connected to the return channel. With magnetized solenoid coil, the first valve seat is opened and the working connection is connected to the pressure connection while the return channel is closed.

A known valve of this construction is described in DE-Publication No. 1,272,664. This known valve has some drawbacks that do not seem to make it suitable for all uses. The valve is unsuitable for use in liquid media and can only be operated under the pressure of the medium. This means that its reliability is questionable, as it requires a minimum pressure for the medium for smooth operation.

US Patent 3,422,850 also discloses a valve in which is mounted a valve plate 25, which is formed as a sealing plate consisting of elastic material and which is held in a position under the influence of a compression spring, which, with one surface thereof, abuts against a first valve seat, while at the lifting movement of the inner valve part against the closing force 30 of the compression spring, after a previous stroke with its second surface, it abuts the second valve seat. This known valve of principle second construction has the disadvantage that the return path of the medium from the working connection to the return channel is externally past the inner valve part through the air gap of the electromagnet 35.

The purpose of the present invention is to provide a single constructed electromagnetically operable 3-way valve which avoids the adverse effects mentioned above, suitable for both aerial and liquid media. , which works with very small magnetic losses, and independently of medium pressure and can be controlled with little electrical energy, and with which, nevertheless, large flow rates can be obtained, or can work in high pressure stages, respectively.

10

This object is met in accordance with the invention in that the valve mentioned according to the invention initially is characterized by the characterizing part of the claim.

15

As explained below on the basis of one embodiment, the valve according to the invention has very short flow paths, and in particular, the return from the working file closure to the return channel is not passed through the annular gap between the magnetic anchor and the outer guide tube. The valve has a simple construction. It is independent of the medium pressure and has a valve plate designed as an elastic plate which, by means of the two mentioned valve seats, causes the respective closure.

Due to its small magnetic losses, the valve according to the invention can be set with small electrical performance, making it particularly suitable for an electronic adjustment. Likewise, it can be advantageously used instead of known valves with larger flow rates and higher pressure stages.

30

On the basis of the drawing, the following examples are illustrated for the valve according to the invention. In the drawing, FIG. 1 is a sectional view of one embodiment of the valve according to the invention; FIG. 2.1, 2.2 and 2.3 details of variants of the embodiment fig. First

35

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3

The FIG. 1, a valve housing 1 has a pressure connection P which can be connected to a pressure source and a working connection A which can be connected to a user. The pressure connection P is via a duct 12 and the working connection A 5 is connected via a duct 13 to a valve chamber 11 which is unilaterally openly arranged in the valve housing. The end of the duct 12 opening in the valve chamber 11 is formed as valve seat 14.

10 On the valve body, a pressure cap is screwed tightly, which closes the valve chamber 11 towards the exterior. This valve top has an outer guide tube which is connected at one end to the valve housing 1 with a fastening device, which is formed as a screw nut 2a with a stop piece. 15 ke with external threads, which are screwed into the valve housing 1. At the other end, the outer guide tube 2 is connected to a head piece 3, through which an inner tube 4 is passed in such a way that it projects concentrically with respect to the outer guide tube 2 into the interior space between the cylinder head 3 and the valve housing 1. The end of this inner tube 4 facing the valve housing 1 is formed as a valve seat 15 which, at a predetermined distance, faces the valve seat 14 in the valve chamber 11.

An inner space of annular cross-section is formed between the inner tube 4 and the outer guide tube 21 on the inner guide tube 21, in which is arranged the movable valve inner member, which is formed as a hollow cylindrical body of magnetically conductive material, forming magnetically anchored 5, on the lower end of the magnetic anchor 5, a valve plate designed as a sealing plate 6 is retained. A compression spring 7 located between a ledge in the outer guide tube 2 and a flange-like extension of the magnetic anchor 5 at the end supporting the sealing plate 6 causes the magnetic anchor 5 to act. the compression spring 7 is pressed to a position where the sealing plate 6 abuts against and on the valve seat 14.

A magnetic coil 8 is arranged about the top piece 3 and the outer guide tube 2, around the outside of which a magnet 4 is guided 9, the ends of which abut against the top piece 3 and the outer guide tube 2, respectively. an overflow nut 10 screwed onto the head piece 3.

5 The headpiece 3 consists of magnetically conductive material, while the inner tube 4 and the upper section 2c of FIG. 1 of the outer guide tube 2 consist of non-magnetizable material. The lower section 2b of FIG. 1 of the outer guide tube 2 as well as the screw nut 2a again consists of magnetically conductive material.

10

The magnetic anchored 5 has flow openings 16 at the end facing the valve chamber 11, which may, for example, be slit-like and which connect the inner space of the valve chamber 11 with the inner space of the magnetic anchor 5.

15

The operation of the device shown in FIG. 1 valve is as follows:

With non-magnetized magnetic coil 8, under the influence of the compression spring 7, the magnetic anchor 5 of FIG. 1, so that the sealing plate 6, with its underside, abuts on the valve seat 14. In this position, the pressure connection P is closed and the working connection A via the flow openings 16 and the inner tube 4 is connected to the return channel R.

25 If the magnet coil 8 is magnetized, the magnetic anchor 5 of FIG. 1 in the vertical direction against the force of the compression spring 7 upwards, and this far, until after a given lifting path the upper side of the sealing surface 6 sits on the valve seat 15 at the lower end of the inner tube 4. In this connection, the pressure connection P is connected to a working connection A, while the return channel R is closed. In this state of the valve at magnetized solenoid coil 8, the power line current is effected via the upper end of the magnetic train 9, the top 25 piece 3, the magnetic anchor 5, an air gap for X to bake to the lower end of the magnetic train 9. However, the gap losses between the magnetic anchor 5 and the outer guide tube 2 can be maintained

Claims (2)

149500 very small, as this cross-section does not need to be flowed through a medium. On the contrary, the air gap is limited to the necessary working air gap, since in the said design of the lower part 2a of the outer guide tube 2 with the screw nut 2a of magnetically conductive material, a very good return of the magnetic current is provided. The design and retention of the sealing plate 6 acting on the magnetic anchor 5 as the valve plate 5 can be effected in various ways. In FIG. 2.1 is the embodiment of the sealing plate 6 according to FIG. 1 shown again and shown in relation to those in FIG. 2.2 and FIG. 2.3. 15 In the variant according to FIG. 2.2, a sealing cap 6a is provided at the lower end of the magnet anchor 5, the horizontal sections of which as the sealing plate abut either the valve seat 14 or the valve seat 15. On the sides of the sealing cap 6a, the flow openings 16a connecting the friend of the inner compartment 11 to the magnet anchor 5 are arranged. interior space. In the embodiment of FIG. 2.3, the sealing plate 6 is arranged via, for example, elastic retaining means 17 on the inner side 25 of the lower end of the magnetic anchor 5. When using elastic retaining means 17, the sealing plate 6 itself need not consist of elastic material. Patent claim 30 ------------------- Electromagnetically operated 3/2-way valve, in particular for remote control of unilaterally fluid-responsive devices, with a valve housing in which a unilaterally disposed open valve chamber which is connected via a first channel to a pressure connection and via a second channel is connected to a 149500 working connection, and wherein the end of the first channel located in the valve chamber is designed as a first valve, a valve cover which closes the open side of the valve chamber and is firmly connected to the valve housing and having an outer guide member inserted at one end of the valve housing, connected to a head through which a return channel is extended, a magnetic coil disposed on the valve top, which is on its outer side is enclosed by a magnetic yoke whose ends abut against the cylinder head and outer guide portion, respectively, as well as a movable vein-member portion disposed within the outer guide portion with a magnetic anchor and one facing the first valve seat positioned at the end of the valve plate, which, under the influence of a compression spring, is held in a position in which the valve plate abuts the first valve seat and at which an inner tube is arranged within the outer guide part and coaxially with it. end is connected to the return channel and the second end of the valve formed at a predetermined distance lies opposite the first valve seat and at which the valve member portion is formed as a hollow cylindrical between the outer guide portion and the inner tube; a body having flow openings connecting the valve chamber to the interior space of the body, and wherein the two-sided valve plate is arranged such that, by a lifting movement of the magnetic anchor against the closing force of the spring, it abuts against the first valve seat, characterized by, the outer guide part is formed as a guide tube (2), 50 which is connected in one part with its part facing towards the valve housing (1). thick with a fastener (2a) while the other end is connected to the head (3), an upper portion (2c) facing the head (3) of the guide tube (2) consisting of non-magnetizable material, while a The -55 portion (2a) facing the lower portion of the guide tube (2) consists of magnetically conductive material, and that the passage openings are formed as slots (16, 16a) arranged immediately at the end of the inner valve portion (5) towards the valve chamber.