DE2326716A1 - SOLENOID VALVE WITH SOLENOID COIL AND PLASTIC GUIDE TUBE - Google Patents

Description

Solenoid valve with solenoid coil and plastic guide tube

The invention relates to further advantageous embodiments of the solenoid valve with magnetic coil and plastic guide tube according to patent application

P 22 27 166 .: ")..:

From the production point of view, Ep has proven to be advantageous that the magnet armature is designed as a round armature. That assumes that the grooves for connecting the lower valve chamber with the upper valve seat are no longer made in the armature.

The object of the invention is to provide a structurally simple, those set out above To create a solenoid valve that fulfills the prerequisites, has excellent running properties and a long service life.

This object is achieved according to the invention in that the coil body has grooves on the inner diameter, which are preferably symmetrical are arranged, has, through which the medium to the outlet of the valve in the case of a normally closed valve and in the case of a normally closed valve. . », open valve, the medium from the inlet of the valve to the consumer connection flows. The requirement for excellent running properties with a long service life is met by the fact that the at the same time as Trained guide tube. Plastic bobbin and the magnet armature are made of stainless steel.

The advantages achieved by this invention are that the Magnetic armature due to the design of the bobbin as a round armature can be manufactured and due to the material pairing plastic stainless steel has excellent running properties and thus expect a long service life even with completely oil-free media leaves.

An embodiment of the invention is shown in the drawing and is described in more detail below:

409851/0048

Show it . "

Figure 1 shows a cross section of the solenoid valve; Figure 2 shows a cross section of the guide tube.

The field winding 2 is attached to the plastic bobbin 1, which is designed as a core guide tube. The wall thickness of the guide tube is towards the valve housing outside of the coil winding space " reduced to the required minimum in order to minimize the magnetic air gap between the metal sheets 3 of the external magnetic circuit and the magnetic core 4 to be kept as small as possible. The bobbin 1 has in the area in which the coil body bore serves as a guide for the armature 4, preferably four symmetrically and parallel to the coil axis arranged grooves 14 which form the connection from the lower valve chamber 15 to the upper valve seat 10. In the de-energized state the magnet coil, the magnet armature 4 seals the lower valve seat 8 via the seal 7 and the lower valve chamber 15 becomes Relieved via the grooves 14 of the bobbin 1 and the open upper valve seat 10. Make the grooves 14 in the bobbin 1 the usual grooves in the armature 4 are superfluous: thus a magnet armature with a completely circular cross-section can be used in the embodiment according to the invention.

At the lower end, the coil body 1 is designed as a flange which seals against the valve housing 6 with an O-ring 5. In -The upper armature position seals the core seal 9 against the valve seat 10 of the magnet body 11. The magnet body 11 is sealed against the coil body 1 by means of an O-ring 12. Solenoid and Housings are held together with screws 13.

409851/004 8

Claims (2)

• 3- Protection claims Solenoid valve with solenoid coil and plastic guide tube according to patent application P 22 27 166.5, characterized in that the coil body has grooves on the inside diameter, which are preferably are arranged symmetrically, through which the medium for a normally closed valve Output of the valve and with a normally open valve the medium flows from the inlet of the valve to the consumer connection. 2. Solenoid valve with solenoid coil and plastic guide tube according to claim 1, characterized in that the simultaneously The bobbin is made of plastic and the armature is made of stainless steel are. . 409851/0048 Blank