DE3606916A1 - MAINTENANCE DEVICE FOR A PNEUMATIC PRESSURE - Google Patents

Description

DIPt-ING. BUSCHHOFF Kj

DIPL-ING. HENNJCKE:: .- ■ -

^DIPUN f _K ^, ii ^{LßACH: -:;} '._-.; - ο: ;; «» «, *** 3.3.1986 KAISK-WUHELM-RING 24 Εβ £ · ~ 1 £ Τ · S ΒΤ 262

Ana. * HOERBIGER VENTILWERKE AKTIENGESELLSCHAFT, Vienna

23 »A-1110 ^ i« _ (Austria)

Holds maintenance equipment for a pneumatic pressure medium

The invention relates to a maintenance device for a pneumatic pressure medium, with one on a filter head arranged filter insert and a liquid separator, the container of which is attached to the filter head and a drain valve has, the closure body is loaded by a closing spring.

In a known maintenance device of this type, the filter head has side connections for the inlet and outlet Discharge of the pressure medium and provided on its underside with a seat for the container, which is against the filter head is screwed sealingly. Inside the container there is a swirl device that moves the pressure medium flowing in Rotation offset, a filter element and a baffle plate are provided, which together with one in the container axis arranged tension screw are tightened against the filter head. The drain valve is located at the bottom of the container, the closure body of which penetrates a drain hole and is pressed onto it in a sealing manner by means of a closing spring will. There are also known designs in which the FiI-

tereinsatz is screwed by means of a thread on the filter head, while it clamps the swirl device at the same time. The known designs consist of several individual parts, the production of which is complex and also when Assembly and maintenance in operation require cumbersome assembly work.

The invention is based on the task of adding the previously known maintenance devices of the type mentioned at the beginning simplify, in particular to reduce the number of components required.

The maintenance device according to the invention is characterized in that that the closing spring with its end facing away from the closure body of the drain valve directly or is supported by an intermediate piece, e.g. a baffle plate, on the filter insert and holds it on the filter head. With this design, there is no need for a separate device for attaching the filter insert to the filter head. These Task is taken over by the closing spring of the drain valve, whereby several components that are common to the known Versions for attaching the filter insert are not required. The maintenance device according to the invention is therefore made up of only a few components, so that it can be carried out easily and quickly, especially with the use of automatic machines, can be installed and in the same way is easy to maintain.

In a preferred embodiment of the invention, the closing spring, the closure body of the drain

valve and possibly also the baffle plate or a Support body of the filter insert from a coherent structural unit, these components preferably being made in one piece Are made of plastic. In this training, a single, cheap plastic part takes on all the functions are carried out in the known designs of several complicated components.

ο In the drawing is an embodiment of the Maintenance device according to the invention shown in axial center section.

The maintenance unit has a filter head 1 with connections 2 and 3 for the supply and discharge of what is to be serviced pneumatic pressure medium. On its underside, the filter head 1 is provided with a cylindrical thread extension 4, screwed into a container 5 for the separated liquid and with the interposition of a sealing ring 6 is clamped against the filter head 1. At the lower end of the container 5 there is a drain valve 7 for the liquid. This has a closure body 8 which penetrates a bore in the container 5, a subsequent one Closing spring 9 and a baffle plate 10 at the upper end of the closing spring 9. The closing spring presses over the baffle plate 10 9 a filter insert 11 with the interposition of a swirl body 12 against an annular seat 13, which the Entrance to an outflow space 14 which is connected to the connection 3 of the filter head 1 surrounds.

From the drawing it can be seen that the locking

spring 9 not only holds the closure body 8 of the drain valve 7 on its valve seat, but also for holding it of the filter insert 11 is used, so that for anchoring and fastening it to the filter head 1 and in the container 5 no special arrangements are required. In addition, the drawing shows that the closing spring 9 together with the closure body 8 and the baffle plate 10 from a one-piece component, preferably made of plastic is. The entire maintenance device has only a few individual parts that can be easily assembled, especially with the use of automatic machines, and which also enable rapid maintenance during operation. In particular the filter insert 11 can be installed and removed in a few simple steps. Emptying the container 5 takes place simply by lifting the outwardly protruding closure body 8 of the drain valve 7, whereupon the liquid can flow away.

Patent claims:

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Claims (2)

Claims; 1. Maintenance device for a pneumatic pressure medium, with a filter insert and arranged on a filter head a liquid separator, the container of which is attached to the filter head and has a drain valve, the Closure body is loaded by a closing spring, characterized in that the closing spring (9) with its the end facing away from the closure body (8) of the drain valve (7) directly or via an intermediate piece, E.g. a baffle plate (10) is supported on the filter insert (11) and holds it on the filter head (1). 2. Maintenance device according to claim 1, characterized in that the closing spring (9), the closure body (8) of the Drain valve (7) and possibly also the baffle plate (10) or a support body of the filter insert (11) consist of a coherent structural unit, preferably made in one piece from plastic.