DE2458784A1 - Filter connection head - has inlet or outlet passages automatically closed by removal of filter bowl - Google Patents

Abstract

The inlet and outlet passages in the connection-head of a filter used esp. in pipes carrying drinking water are opened and closed by screwing the bowl which supports the filter element into and out of the head respectively during replacement of the element. The element can be safely replaced by unskilled personnel.

Description

Filter connection housing The invention relates to a filter connection housing with lockable inlet and outlet connections and a filter body supporting, screw-in bell, in particular for arrangement in a pipeline for processing of drinking water.

With such facilities it is necessary, depending on the degree of pollution of the medium to be filtered against the dirty filter element from time to time exchange a new one. The inlet and outlet must be shut off, to prevent the medium from flowing out when replacing the filter insert.

By the German utility model 73 067 35 and 73 253 72 it is known, in a one-piece Gruüdkörper, on which with a bell body of the Filtereinsa'sz is attached, manually operated shut-off valves for the inlet and outlet nozzles to arrange. The disadvantage of this arrangement is that if it is used improperly when changing the filter element, e.g. by a non-specialist, floods can occur and even parts of the Device can lead to injuries to the operator.

The invention is based on the object of the known filter connection housing to improve so that the replacement of the filter insert for the layman without further is possible and harmless.

This object is achieved according to the invention in that the barrier or opening of the inflow and outflow channel by means of the bell by screwing it in or out takes place in the filter connection housing.

For this purpose, the inflow is in a further embodiment of the invention controlled by means of a ring plate valve arranged in the inflow channel, des. # ring plate fastened with springs in the direction of one on the coaxially arranged drainage channel annular Valve seat is rammed, and to block the drainage channel from a known per se Check valve provided. For easy operation and opening, the Ring plate valve according to the invention can be provided with a pressure compensation device.

This inventive solution is a foolproof device created to replace the filter insert.

An embodiment of the invention is shown in the drawing and is described in more detail below. They show: FIG. 1, a longitudinal section through a filter connection housing with an attached filter and bell, whereby each one half of the picture show the open and closed positions.

Figure 2, a section along the line AA through the filter connection housing.

The filter connection housing is by means of a pipe adapter l with its supply nozzle 2 and discharge nozzle 3 in a supply pipeline switched on. At the nozzle 2, the raw water enters the feed channel 4 of the pipe adapter a and is via the discharge channel 5 after the filtration of the supply line fed back. In the discharge channel 5 is central in the intermediate pipe piece a check valve 6 is arranged, which prevents the filtered medium from flowing back prevented. In FIG. 1, the check valve is one half of the center line shown in the open position, the other half in the closed position. On the pipe adapter l is the filter head piece 7 by means of a seal 8 and connecting elements (not shown) tied together. The supply channel 4 and the coaxially guided return channel 5 will be in the filter head piece 7 deflected by 90 o. To record a housing bell 10 accommodating the filter element 9 is the headrest with a Thread 11 equipped. To accommodate the filter element is at the bottom of the bell a projection 11 is arranged and guided on the tubular coaxially in the filter head housing Drain channel 5 a screwed on with a receiving shoulder for the filter element equipped socket 12 is provided. In the inlet channel 4 is a with O-ring 14 sealed ring plate 13 with springs 15 to seal against the end face 16 of the socket 12 rammed, as in the left half of FIG. 1 In the right half of the picture, the ring plate is shown in the open position. By screwing in the bell, which has a smooth, fine thread 10, which is sealed with O-ring 17 in the filter head piece, is by means of a spring ring 18 on which three valve cones 20 are arranged and in bores 19 of the Ringtellex 13 are performed with play, the ring plate ventilated and the Entry to bell 10 released.

So that the closure heads 21 of the valve cone 20 when unscrewed Bell come to the tight contact, 18 compression springs 22 are embedded in the guide ring.

The mode of operation of the above-described example of the invention is as follows: When the filter bowl 10 is unscrewed, the ring plate 13 is secured by the springs 15 pressed against the end face 16 of the socket 12 and thereby blocks the inflow channel to the filter.

The drainage channel is blocked by the check valve 6.

The water in the filter bowl 10 can, but does not have to, be drained through a drain plug 23 located in the bottom of the bell. so the filter element 9 can be exchanged after removing the filter cover.

When screwing in, the bell 10 initially presses the guide ring 18 against the ring plate 13. This will make the Versclulußkopfe 21 the Valve cone 20 lifted from the ring plate 13, so that water through the bores 19 can flow into u bell 10 to equalize pressure. After pressure equalization has taken place is the ring plate 13 by further screwing the filter bell 10 into the open Raised position and the inlet to the filter released. The check valve 6 opens automatically when water is drawn off.

Claims (5)

A bT S P R t} C. # E 1. Filter connection housing with lockable inlet and outlet connections and a screw-in bell supporting the filter body, in particular for the arrangement in a pipeline for the treatment of drinking water, characterized in that the blocking or opening of the inlet and outlet channels (4, 5) by means of the bell (10) is done by screwing or unscrewing into the filter connection housing. 2. Filter connection housing according to claim 1, characterized in that that the inflow is controlled by means of a ring plate valve arranged in the inflow channel (4) is, whose ring plate (13) with springs (15), in the direction against one on the coaxial arranged drainage channel (5-) attached annular valve seat (16) rammed will. 3. Filter connection housing according to claim 1 - 2, characterized in that that a check valve (6) known per se is provided to shut off the drainage channel is. 4. Filter connection housing according to claim 1 - 2, characterized in that that the ring plate (13) has a pressure compensation device for easy opening. 5. filter connection housing according to claim 1 - 2 and 4 ,. characterized, that the pressure compensation device consists of a guide ring (18) and is fixed to this arranged bolt-shaped, axially movable through bores (19) in the ring plate (13) guided, with springs (22) tensioned valve cone (20), which with their Closure bodies (21) on the face of the ring plate (13) the bores (19) Sealing lund that the opening of the valve cone (20) with the end face of the screw-in Bell (10) takes place against the force of the spring (22) by axial displacement.