DE1912017A1 - Explosion and moisture-proof oil warning probe - Google Patents

Description

Explosion-proof and moisture-proof oil warning probe r k u n g A number of methods are known for indicating oil damage that has occurred achieve that the amount of oil occurring with a contact-making Bringing establishment in connection. Swellable ones are preferably used for the contact release Plastic body used soft in suitable arrangements to trigger a preferably lead to electrical contact.

The method described below also uses one swelling under the influence of liquid or gaseous hydrocarbons Plastic body, but its special geometric shape makes it a short-term display leads that are not achieved in terms of time in the conventionally known arrangements can.

D e ctio n g e s between a preferably round housing body, which consists of a lower housing part (1) and an upper housing part (2), a plastic round blank (3) is clamped in such a way that it is radially symmetrical and free of stress and is only held on the clamping edge by the screw connections (7). Appropriate a center support (13) is arranged in the lower part (2) of the housing so that when Swelling of the plastic blank (the direction of swelling is fixed. The lower part of the housing (1) is provided with capillary bores (10) through which the liquid or gaseous Hydrocarbons can enter the housing and cause contact with the surface come with the swellable round blank (3). To prevent the carbons from entering The lower part of the housing (1) with support supports enables the capillary bores (11), between which hydrocarbons reach the capillary bores can. To increase the wetting speed and thus the swelling of the round blank (3) To achieve in the short term, it is useful to put between the blank itself and the Housing a narrow ring channel (14), which is decisive for the surface capillarity is to be attached. Furthermore, it is necessary that between the entering liquid and to remove the volume of air present in the round blank from the wetting space (14). to this Purpose is in the lower part of the housing under the blank itself Ventilation channel (12) provided. On the opposite side from the wetting side An elastic metallic contact strip (4) rests on the surface of the round blank, which is conductively connected to the electrical contact (5). The, O1 warning probe provides an aggregate consisting of 2 chamber parts, in which the space above the 1uellbaren The round blank is explosion-proof and moisture-proof against the outside environment of the probe. For any free humidity that may occur in the contact space of the A moisture-inhibiting medium (15) can be attached to the probe.

Is now caused by the entry of liquid or gaseous hydrocarbons through the capillary bores (10) the facing side of the round blank is wetted, then arises a swelling process that leads to the fact that the round blank after a prescribed Side arched. This warping leads to the metallic contact strip (4) is raised tangentially and so after the smallest warping of the round blank (3) comes into contact with the make contact (6). The closing contact (6) does not have to be arranged centrally to the probe housing, but can of course be offset. Such a transfer would have the consequence that the contact is already made occurs with the slightest warping, but on the other hand in a non-warped state a greater distance between the contact strip (4) and the make contact (6) exists.

The contacts (5 and 6) are locked with plastic lock nuts (8) Occurring leakage currents are fixed, These lock nuts can be designed in such a way that that a cylindrical neck for receiving the electrical contacts (9) is provided becomes that after the fixation a potting of the electrical connection lines within the lock nuts (8) becomes possible.

The formation of the contact lamellas (4) ß take place in such a way that the normal forces, which occur at the curvature of the plastic round blank (3) are sufficient for the contact lamella (4) to be raised.

For this reason, the cross-section of the lamella must be at the bending point.

can be reduced so that the bending force is less than the curvature force the round is. Embodiments for the contact lamella (4) are in the forms (16, 17 and 18). A ventilation system of the annulus (14), which lies outside the possible liquid wetting, this can achieve that the venting Bochrung via an annular channel (19) in the upper part (2) of the probe is directed.

This ensures that even if the probe is immersed deeper in liquid hydrocarbons elne venting of the annular space (14) guaranteed is.

The oil warning probe can be connected to any electrical network in particular it is possible to switch the bl warning probe into the Bell circuit to operate so that no electrical facilities for the Alarm triggering are necessary.

The oil warning probe can be arranged in connection with an oil warning line that oil warning probes are switched in between the oil warning line at certain intervals and the overall system clever lines and probes so a localized alarm display enable.

Claims (1)

P a t e n g a n p r u c h e 1. Explesions and moisture-proof oil warning probe characterized that between a two-part corrosion-resistant electrically non-conductive A swellable plastic tube is clamped into the housing. that it is radially symmetrically stress-free and under the influence of liquid or gaseous hydrocarbons move in a given direction vault and at this past a metallic Kentakt lamella lifts tangentially until a contact with an electrical counter contact is reached. L e r s e i t e