DE2918993A1 - Electromagnetic actuator for valve - has electro-optical indicator built into valve solenoid casing and protruding through housing aperture - Google Patents

Abstract

The electro-optical indicator shows whether or not the coil is excited. Such indicators are normally remote from the valve. This results in additional installation costs and also in some insecurity due to the lead length between coil and indicator. The present indicator (14) is mounted to protrude through a cut-out in the housing (2) enclosing the valve-operating coil (4). Typically, the indicator is in the wall of the electrical connector (10) between the incoming supply leads and the coil. A current limiting resistor (19), in series with the indicator, is normally included.

Description

Control technology Staiger
GmbH and Co. KG
Schmerbachweg 4

7121 Erligheim, Germany

Magnetic head for a valve or the like.

In order to display the switching status of solenoid valves, it is known to install light indicators in the control cabinet, which light up when the electromagnet is switched on. These light indicators are disadvantageous in that they differ from each other Magnetic head are arranged separately. Another disadvantage is that the assembly is expensive because additional installation work has to be carried out for the indicator light in the control cabinet. There is also the Disadvantage that when the operating procedure is changed, for example if the solenoid valve is displaced or

The invention relates to a magnetic head for a valve or the like according to the preamble of claim 1. l |

030047/0222 |

Il lit

- 5 -r

is built, a switchover or shutdown of the I-light display must be made, which in turn represents an additional effort.

Accordingly, the object of the invention is to improve a magnetic head of the type described at the outset so that that an independence of the indicator light, of separate installation work and separate installation elements is achieved and an electric light indicator is emitted directly from the magnetic head.

According to the invention, this object is achieved by the identification features of claim 1 solved.

This has the advantage that the indicator light is integrated in the magnetic head, so that a single compact Assembly given iet, with the further advantage that the switched-on state of the coil by lighting up the indicator light is displayed directly on the magnetic head, so that the switching function at the respective operating point cannot be confused can be seen. When assembling the solenoid valve, no additional installation work is required for the indicator light required and in the event of a change of the operating procedure would be the relocation of the magnet

030047/0222

valves installed the indicator light at the same time as the magnetic head, with no extra work to be carried out are.

Preferred embodiments of the invention are given by the features of the subclaims, by their application a secure storage of the indicator light and appropriate contact connections can be achieved in an advantageous manner.

Further advantages and details of the invention can be found in the following description and the drawing, the preferred embodiments in a schematic representation as an example shows. They represent:

1 shows a magnetic head in a sectional side view,

PlG.2 cut the magnetic head according to PIG.1 in another Side view and

3 shows a view of the magnetic head according to FIG. 1, however in a partially different version.

The magnetic head 1 shown in Figures 1 and 2 has

- 7 030047/0222

29Ί8993

an existing metal housing 2, in which a coil 4 is mounted on a bobbin 3, which of a Plastic jacket 5 is wrapped. The coil 4 has at the lower and upper end each a connecting wire 7,8, the are connected to contact sockets 8, 9 which are firmly injected into the plastic jacket 5. The case has a recess on one side in which an insert part 10 made of plastic is arranged, which has two permanently injected plug contacts 11, 12 with their free ends on the coil side in the contact sockets 8, 9 are supported contact-locked, the assembly being carried out in such a way that the plug contacts are first of all 11, 12 are inserted into the contact sockets 8, 9 and then the coil 4 with the insert part 10 together into the Housing 2 is inserted. An indicator light 14 is arranged in the upper outer wall 13 of the slide-in part 10, which is mounted in a bore 15, the diameter of which is practically the same as the diameter of the indicator light 14 corresponds, so that the latter is held in the outer wall 13 in a form-fitting manner without play. This also applies to any Occurring vibrations or the like. A firm seat of the indicator light 14 is guaranteed, this is from a Engaged under the clip nose 16, so that inadvertent sliding out of the bore 15 is prevented. the Indicator light 14 has two connecting lines 17,18,

- 8 030047/0222

of which the connecting line 18 at the plug contact 12 and the connecting line 17 is arranged on the plug contact 11, wherein between the plug contact 11 and the indicator light 14 a series resistor 19 is arranged in the connecting line 17, the resistance of which is adapted to the requirements is tuned and the current for the indicator light 14 is limited.

In the magnetic head 1 shown in FIG In contrast to FIG. 1, a further plug contact 20 is arranged in the area between the plug contacts 11 and 12, the contact is stored in a contact socket 21, which is between the other two contact sockets 8,9 is located and is firmly injected into the plastic jacket 5. Here, the connecting line 18 is the Indicator light 14 is also attached to the plug contact 12, while the other connecting line 22 is attached to the middle plug contact 20 is attached. A tap line 23 is tapped on the coil 4 between the connecting wires 6 and 7, which is connected to the contact socket 21, so that in this case part of the coil 4 has a series resistor function to limit the current for the indicator light 14 fulfilled.

030047/0222

• · ■ · ti III

I t

- 9 List of Reference Numbers

1 = magnetic head

2 s housing

3 = coil body

4 = coil

5 = plastic jacket

6 s connecting wire I 7 «connecting wire

I 8 a contact socket I 9s contact socket

I 10 = one-sub part

$ 11 = plug contact

[f; 12 s plug contact

ti 13 s outer wall

p 14 = indicator light

I 15 = hole

ii 16 s clip nose

1 17 = connecting cable

18 = connecting cable

% 19 - series resistance

I 20 = plug contact

ψ 21 s contact socket

P 22 = connecting cable

23 = tap line

030047/0222

Claims (9)

• f · * Control technology Staiger
GmbH and Co. KG
Schmerbachweg 4 Erlighelm Magnetic head for a valve or the like. Claims M) Magnetic head for a valve or the like, with a housing, in which a coil is mounted, characterized in that the housing (2) is one when current flows through the coil (4) has a lightening electro-optical indicator light (14). 2. Magnetic head according to claim 1, wherein the housing on one side has an insertion part for the connection of a power supply cable having, characterized in that the indicator light (14) in an outer wall (13) of the Insert part (10) is arranged. 0300A7 / 0222 i f * ■ - ■ «" - ■ I * ^ 3. Magnetic head according to one of claims 1 or 2, characterized characterized in that the indicator light (14) penetrates the outer wall (13) in a bore (15), the The diameter is essentially the same as the diameter of the indicator light (14). 4. Magnetic head according to one of claims 1 to 3, characterized in that the insert part (10) has a Has indicator light (14) engaging under clip nose (16). 5. Magnetic head according to one of claims 1 to 4, characterized characterized in that the connection lines (17,18,22) of the indicator light (14) are connected to plug contacts (11,12,20) are arranged in the insert part (10). 6. Magnetic head according to one of claims 1 to 5, characterized in that between the plug contact (11) and a series resistor (19) is arranged in the connecting line (17) of the indicator light (14). 7. Magnetic head according to one of claims 1 to 5, characterized in that the connecting line (22) of the indicator light (14) is connected to a tap line (23) which runs between the connecting wires (6,7) - 3 0 30047/0222 ■ < m .... J ι ■ a CII at the beginning and end of the coil (4) is connected to this. 8. Magnetic head according to one of claims 1 to 7, characterized in that the plug contacts (11,12,20) in the Insert part (10) injected feet and stored with the coil-side free ends in contact sockets (8,9,21) which are fastened in a plastic jacket (5) enveloping the coil (4). 9. Magnetic head according to one of claims 1 to 8, characterized in that the connecting wires (6,7) and the The tap line (23) of the coil (4) are arranged on the contact sockets (8,9,21). 030047/0222