DE2458784C3 - Filter connection housing - Google Patents

Description

The invention relates to a filter connection housing with a shut-off valve in the inflow channel and one in the A non-return valve arranged on the drainage channel and a screw-in one that receives the filter element Filter bell, in particular for arrangement in a pipeline for the treatment of drinking water.

With such facilities it is necessary, depending on the degree of contamination of the medium to be filtered replace the dirty filter element with a new one from time to time. Here the supply and Drainage shut off to prevent the medium from flowing out when replacing the filter element:?. U avoid. Through the publication of the German utility model 73 06 735 it is known in one one-piece base body, to which the filter element is attached with a filter bell, by hand to arrange actuatable shut-off valves for the inlet and outlet nozzles. The disadvantage of this arrangement is it that with improper operation when changing the filter element, z. B. by a non-specialist, it to floods and even if the water pressure caused the Device can lead to injuries to the operator.

The invention has for its object to improve the filter connection housing so that the Replacing the filter element is also easily possible and harmless for the layperson.

This object is achieved according to the invention in that in the inflow channel which is guided coaxially to the outflow channel ίο a ring plate valve is arranged, which can be operated with the filter bell in such a way that the inlet to the The filter element is released when the filter cover is screwed in, locked when the filter cover is unscrewed is.

To handle such a ring disk valve

Making it easy to run is after another

Formation of the invention the valve with a

Provide pressure compensation device.

An embodiment of the invention is in

Drawing shown and is described in more detail below. It. indicates

F i g. 1 shows a longitudinal section through a filter connection housing with a connected filter and bell, with one half of the image each showing the open and closed position, FIG. 2 a section along the line AA through the filter connection housing.

The filter connection housing is by means of a pipe adapter 1 with its 2 'supply nozzle 2 and discharge nozzle 3 in a supply pipeline

switched on, at the inlet connection 2, the raw water enters the inlet channel 4 of the intermediate pipe piece em and is fed back to the supply line via the drainage channel 5 after the filtration. In the discharge channel 5, a check valve 6 is arranged centrally in the intermediate pipe piece, which a Prevents the filtered medium from flowing back. In Fig. 1, the check valve is one half of the Center line in open position, the other half shown in closed position. On the pipe adapter 1, the filter head piece 7 is connected by means of a seal 8 and connecting elements (not shown). the Inflow channel 4 and the coaxially guided outflow channel 5 are deflected in the filter head piece 7 by 90 °. To the The head piece with a thread 11 accommodates a filter bell 10 accommodating the filter element 9 equipped. A projection 110 is arranged on the bottom of the bell to accommodate the filter element one with a thread on the tubular coaxially guided outflow channel 5 in the filter head housing screwed-on socket 12 equipped with a receiving shoulder for the filter element is provided. in the Inflow channel 4 is an O-ring 14 sealed ring plate 13 with springs 15 for a tight seal rammed against the acting as valve seat 16 end face of the socket 12, as in the left half of the Fig.! shown. In the right half of the picture, the ring plate is shown in the open position. By screwing in the provided with a smooth fine thread filter bell 10, which with O-ring 17 in the The filter head piece is guided in a sealed manner by means of a guide ring 18 on which three valve cones 20 are arranged and are guided in bores 19 of the ring plate 13 with play, the ring plate is lifted and the Entry into the Fiiterglocke 10 released.

So that the closure bodies 2 \ of the valve cone 20 come to a tight contact with the filter bell unscrewed, compression springs 22 are embedded in the guide ring 18.

The mode of operation of the example of the invention described above is as follows:

When unscrewing the filter bell 10, the ring plate 13 is by the Federp 15 against the than Valve seat 16 formed end face of the socket 12 pressed and thereby blocks the inflow channel to the filter away. The drainage channel is blocked by the check valve 6. The one located in the filter bowl 10 Water can, but need not, be drained through a drain screw 23 located in the bottom of the bell will. Now the filter element 9 can be exchanged after removing the filter cover,

When screwing in, the filter bell first presses the guide ring 18 against the ring plate 13. As a result, the Verschhißkörper 21 of the valve cone 20 are lifted from the ring plate 13 so that Water can flow into the filler bell 10 through the bores 19 for pressure equalization. After the The ring cap 13 is compensated for pressure by screwing the filter cap 10 further into the open position raised and the inlet to the filter released. The check valve 6 opens automatically when water is withdrawn

For this purpose 2 sheets of drawings

Claims (4)

Patent claims: 1. Filter connection housing with a shut-off valve in the inflow channel and one in the outflow channel Check valve and a screw-in filter bell housing the filter element, in particular for arrangement in a pipeline for the treatment of drinking water, thereby characterized in that im coaxial with the drainage channel (5) guided inflow channel (4) a ring plate valve (13, 16) is arranged, which with the The filter bell (10) can be operated in such a way that the inlet to the filter element (9) when the filter bell is screwed in released, is completed when the filter cap is unscrewed. 2. Filter connection housing according to claim 1, characterized in that the ring plate valve (13, 16) from a movable, sealed against the outer wall of the inflow channel (4) guided to Wall of the drainage channel (5) a cross-section leaving a ring plate (13) and a, at least the passage cross-section covering, attached to the wall of the drainage channel (5), annular valve seat (16), the ring plate (13) with springs to ensure a secure closure (15) is rammed in the direction of the valve seat (16). 3. Filter connection housing according to claims 1 to 2, characterized in that the ring disk valve (13, 16) is provided with a pressure equalization device for easy opening. 4. Filter connection housing according to claim 3, characterized in that the pressure compensation device consists of a guide ring (18) and fixedly arranged bolt-shaped valve cones (20), axially movably guided through bores (19) in the ring plate (13) and braced with compression springs (22) ) consists, which with their closure bodies (21) on the end face of the ring plate (13) the holes (19) seal, and that the opening of the valve cone (20) with the end face of the screw-in filter bowl (10) against the force of the compression springs (22) takes place by axial displacement.