DE1761639C

DE1761639C - Pressure tester for fluid lines equipped with a filter

Info

Publication number: DE1761639C
Application number: DE19681761639
Authority: DE
Inventors: Auf Nichtnennung Antrag
Original assignee: Precision Mecanique Labinal SA
Current assignee: Precision Mecanique Labinal SA
Priority date: 1967-06-20
Filing date: 1968-06-19
Publication date: 1973-08-16

Description

filtergehäuses vor bzw. hinter dem Filterelement in Verbindung stehen. Diese beiden Kammern 7 und 9 sind daher dom Öldruck P_n vor bzw. dem Öldruck /' hinter dem Filterelement ausgesetzt. Daraus ergibt sich, daß in Fig.! von links aus gesehen auf die Membran 4 der Druck P_n und der Luftdruck, auf die Membran 5 der Luftdruck und der Druck P sowie auf die Membran 6 der Druck P und der Luftdruck einwirken.filter housing are connected in front of or behind the filter element. These two chambers 7 and 9 are therefore exposed to the oil pressure P _{n in} front of or the oil pressure / 'behind the filter element. It follows that in Fig.! Seen from the left, the pressure P _n and the air pressure act on the membrane 4, the air pressure and the pressure P on the membrane 5 and the pressure P and the air pressure act on the membrane 6.

Auf der Kammer 9 ist außen ein isolierter fester Kontakt 17 befestigt und über eine eine Anzeigelampe, einen Summer od. dgl. enthaltende Leitung 18 mit dem Pluspol der Batterie verbunden. Am Boden der Kammern 8 und 10 ist jeweils eine elastische Kontaktzunge 20 bzw. 21 befestigt, die durch die Öffnungen 11 bzw. 12 dieser Kammern hindurchgehen und am freien Ende jeweils einen Kontakt 22 bzw. 23 tragen, die dabei beiderseits des festen Kontaktes 17 liegen. Die Kontaktzungen 20 und 21 tragen außerdem kleine höckerartige Ansätze 24, 25 bzw. 26, mit denen sie ständig die Niitte ihrer Membranen berühren. Dabei wird die Kontaktzunge 21 mit ihrem Ansatz 26 durch eine geeichte Feder 27 ständig gegen die Membran 6 gedrückt.An insulated fixed contact 17 is attached to the outside of the chamber 9 and is connected to the positive pole of the battery via a line 18 containing an indicator lamp, a buzzer or the like. At the bottom of the chambers 8 and 10, an elastic contact tongue 20 and 21 is attached, which pass through the openings 11 and 12 of these chambers and each carry a contact 22 and 23 at the free end, which are on both sides of the fixed contact 17 . The contact tongues 20 and 21 also have small hump-like projections 24, 25 and 26, respectively, with which they constantly touch the rivets of their membranes. The contact tongue 21 with its extension 26 is constantly pressed against the membrane 6 by a calibrated spring 27.

Dieser Funktionspriifer arbeitet wie folgt: Solange der Druck P in der Kammer 9 den Druck der Feder 27 übersteigt, bleibt der Kontakt 23-17 offen. Sobald jedoch der Öldruck P unter den dem Druck der Feder 27 entsprechenden zulässigen Wert absinkt, vermag die Feder 27 die Membran 6 einzudrücken und den Kontakt 23-17 zu schließen. Da die Kontaktzunge mit ihrem Koniakt 23 an Masse liegt, wird dadurch der Stromkreis geschlossen, und das in der Leitung 18 befindliche Anzeigeorgan eingeschaltet.This function tester works as follows: As long as the pressure P in the chamber 9 exceeds the pressure of the spring 27 , the contact 23-17 remains open. However, as soon as the oil pressure P falls below the permissible value corresponding to the pressure of the spring 27 , the spring 27 is able to depress the membrane 6 and close the contact 23-17. Since the contact tongue is connected to ground with its contact 23, the circuit is thereby closed and the display element located in the line 18 is switched on.

Der Kontakt 22-17 bleibt solange offen wie der Unterschied zwischen den Drücken /"> und P unter dem zulässigen Wert liegt, da die Kontaktzunge dem unterschiedlichen Druck der Membranen 4 und 5 ausgesetzt ist. Sobald jedoch der in der Kammei 7 herrschende Druck Pⁿ vor dem Filterelement den inThe contact 22-17 remains open as long as the difference between the pressures / "> and P is below the permissible value, since the contact tongue is exposed to the different pressures of the membranes 4 and 5. However, as soon as the pressure P ⁿ in front of the filter element

ίο der Kammer 9 herrschenden Druck P hinter dem Filterelement um einen unzulässigen Wen übersteigt, d.h. sobald das Filterelement verstopft ist. wird die Kontakizunge 20 nach rechts gedruckt und schließt mit ihrem Kontakt 22 den Kontakt 22-17, so daß das in der Leitung 18 befindliche Anzeigeorgan — Lampe oder Summer — eingeschaltet wird. ίο the pressure P prevailing in the chamber 9 behind the filter element exceeds by an impermissible value, ie as soon as the filter element is clogged. the Kontakizunge 20 is printed to the right and closes with its contact 22 the contact 22-17, so that the display element located in the line 18 - lamp or buzzer - is switched on.

Die in F i g. 2 dargestellte Ausführungsform unterscheidet sich von der \orbcschriebenen Auslührungsform nur durch die konstruktive AnordnungThe in F i g. The embodiment shown in FIG. 2 differs from the embodiment described only through the structural arrangement

der Kontakte; ihre Arocitsweise ist jedoch die gleiche.of contacts; their arocits manner, however, is that same.

Bei dieser Variante sitzen die Kontaktzungen 20 und 21 sowie der feste Kontakt 17 auf einem U-förmigen Kontaktträger 28, der abnehmbar am Filterge-In this variant, the contact tongues 20 and 21 and the fixed contact 17 sit on a U-shaped contact carrier 28, which can be removed from the filter assembly.

häuse angebracht werden kann. Die beiden Kammern 7 und 9, welche über die Kanäle 13 bzw. 14 mit den entsprechenden Ölleitungen 15 bzw. 16 in Verbindung stehen, sind getrennt ausgebildet, so daß beim Einbau des Kontaktträgers die Kontaktzunge 20 zwischen die beiden Membranen 4 und 5 geschoben werden kann.housing can be attached. The two chambers 7 and 9, which are in communication with the corresponding oil lines 15 and 16 via the channels 13 and 14, respectively, are designed separately so that the contact tongue 20 can be pushed between the two membranes 4 and 5 when the contact carrier is installed .

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

In the known embodiment there is a further knee-level slogan on a push button

1. Pressure tester for a, m filter fitted and as, your ReU ™% ^ ™ ^ ™ l equipped liquid lines, consisting of 5 points. In addition, ui ·, a siunalecbcr with the fluid pressure, is provided. the membrane unlublububiert by Rs-ibungskra .e and exposed only or behind the filter. about friction / u press it. [Jas aiits dl.mi. j characterized in that the Sigi sossohl the sensitivity as well as di. "-Gna'.cebcr additionally has two movable contact accuracy of the Druckprutgerati-s _irim .i ■ ■ tongues (20, 22; 21. 23), 'between which the .AUtfcane ^^'{Τ;, , ^ a fixed pressure testing device of the Plsc at the beginning, which cooperates with the same. <- i ... - ... going contact (17) is arranged. and that the form in Her manner that _{reibungsbclastek;} , -a movable contact pin (20. 22) between the mechanical power transmission practical γ im.,,. ,, g the membranes lieul. which is avoided as two each other »e-. The solution was that the membrane walls (4, 5) 15 on top of the wall were to be found in that the signal transmitter had two additional liquid chambers (7, 9), the liquid of which were conical.! Ut-AeM. zwisenen üenu, ..-, η keitsdruck is to be compared, designed with the same cooperating ^ leststeru ·.,: are, with tile contact tongue (20, 22) is arranged for de-contact. and over the one moving .; ren actuation ^; _fc ung with len facing contact tabs between the membranes. In the area of the membrane walls (4, 5) two opposing membrane walls are intact, while the other movable cone of two liquid chambers, the outer surface of which is under spring tension (21, 23) should be compared, are trained, u. ei voltage (6) which rests against a further membrane wall, these contact tongue for its actuation with Jen a liquid chamber (9), and that the facing surfaces of the membrane * m sov / OHL the space (8) between the diaphragm 25 fertilize is in contact , while the other movement walls (4, 5) of the two fluid chambers are in contact with the outside under redervertension (7, 9) as well as the fluid chamber on the other membrane wall of one fluid chamber (6) of one fluid chamber, and that both the Rai;: n (9) externally adjoining space (10) with the between the membrane walls of the two flow outside air ii; Connected. 30 health chambers as well as one of the other men

2. Druckprüfgeräf according to \ nspruch 1, thereby opening the wall of one liquid chamber characterized in that the two fluid chambers adjoining space are in communication with the outside air mern (7, 9) with their mer bran walls (4 stand.

or 5, 6) and the movable contact tongues According to a preferred embodiment according to

(20, 22 or 21, 23) and the associated 35 of the invention form the two liquid chambers Contact (17) one into the filter housing (3) with its membrane walls and the liquid-tight screw-in and interchangeable contact tongues and the one that can be assigned to it Form block (1, 2). nete solid contact a liquid into the filter housing

3. Pressure tester according to claim 1 or 2, which can be screwed in and exchangeable in a da- tight manner characterized in that the movable con-40 block. The movable contact tongues as well as the ihtaktzungen (20, 22 or 21, 23) and the fixed contact assigned to them are more appropriately assigned fixed contact (17) on a per se interchangeable contact carrier Contact carrier (28) arranged gcr arranged.

are (Fig. 2). The advantages achieved are essentially

45 is that in the pressure tester according to the invention a friction-loaded power transmission is practical is completely avoided, thus ensuring high sensitivity and high accuracy as a result

The invention relates to a pressure testing device.

for liquid conduits equipped with a filter gene, consisting of a signal transmitter with the flow- only one embodiment illustrative sigkeitsdruck in front of or behind the filter exposed drawing explained in more detail. It shows Membranes. F i g. 1 one as a whole in the oil cycle

Such pressure testers are used in particular screw-in function testers according to the motor special in engines to control the oil pressure, 55 invention in section and

in particular for checking oil filters to FIG. 2 a section through a function tester

Purpose of determining whether an interchangeable contact set in an oil line, built oil filter is still functional. When known in FIG. 1 function testers shown pray Pressure testing devices of the type described consists of a housing 1, which with its Ge (USA.-P ^ tentschrift 3 194915) is the power or 60 winch lower part 2 in the oil filter housing 3 of a Mo differential pressure transmission laboriously and is screwed into elevators. This housing 1 is frictionally loaded Lichem measure. The well-known pressure testing device with three membrane walls has a spring for two diaphragms brane4,5 and 6 in four chambers 7, 8, 9, 10 between them two stops on a rod with shares, with the chambers 8 and 10 outside of the oil Cross pin, which lie with friction in the fork 65 circuit and over openings 11 and 12, respectively a toggle lever goes back and forth. This toggle lever communicate with the outside air while sits on a pivot pin, which in turn ranks the chambers 7 and 9 via channels 13 and 14 in the exercise stclle results. Another inevitable Rei- lower part 2 with the oil lines IS or 16 of the oil