DK144710B - LIFTING PLATE FOR PLACING IN A DRAIN FIRE - Google Patents

Description

(19) DENMARK

| J | ο »SUBMISSION WRITING out 1WI0B

DIRECTORATE OF THE PATENT-00 TRADE MARKET

(21) Application No. 2221/76 (51) | nt.CI. ' E 03 F 5/042 (22) Filing day 20 May 1976 (24) Race day 20 May 1976 (41) Aim. available Nov. 22; 1976 (44) Submitted 1 7 · May 1 982 (86) International Application No. - (86) International Filing Day (85) Continuation Day - (62) Stock Application No. -

(30) Priority 21 May 1975 * 2522427 * DE

(71) Applicant BERNHARD KESSEL, 8075 Koesching, DE.

(72) Inventor Same.

(74) Associate Patent Agent Company Magnus Jensens Eftf.

(54) Valve assembly for placement in a drain well.

The present invention relates to a valve assembly of the kind set forth in claim 1.

From the description to German Gebrauchsmuster No. 1.917 * 289 a valve assembly is known for use in connection with, for example, basement drain wells and comprising a swimming ball or ball cooperating with a valve seat and a valve plate movable from above down to another valve seat for regulating the flow opening between the well and drainage system.

The valve ball and the associated valve seat occupy so much space at this 0 arrangement that the mouth of the outlet duct must ^ be extended by means of a special transition piece. The one from *

ISLAND

144710 - 2 - the valve plate closing downwards is easily exposed to sludge or soiling and the risk that the valve cannot be completely closed is therefore high. Furthermore, the unit is composed of several costly individual parts, which is why the manufacturing price is relatively high.

A valve assembly is also known, in which a downwardly closing valve cooperates with a contract flap which is pivotally mounted in the drain channel. This construction makes it difficult to clean especially the drainage duct, since the non-return valve flap is firmly mounted in it and therefore prevents free access to the duct, although the valve assembly is otherwise removed.

From the specification of Danish Patent No. 64,265, a valve assembly of the kind in question is known, which is assembled by a large number of solid individual parts and is pressed by means of clamping means against the well wall with the drain opening. This unit is very complicated in structure and provides hooks and during cuts in which particles in the wastewater can get stuck and hinder the desired function. A bushing gasket that secures the valve plate activation mechanism is not only expensive and space consuming, but will also tend to become hard and leaky as the valve is rarely activated. Regular inspections and adjustments are needed.

Similarly, the top of the pipe bend securing screw is disadvantageous because the aggressiveness of the wastewater will cause it to become stuck and make it difficult to remove for cleaning. Retaining the valve assembly by means of the clamping mechanism shown does not provide a satisfactory seal between the interior of the well and the drain pipe, and the point load against the well wall is inappropriate and permissible only if the well is made of cast iron or a similar rigid material. In a well of, for example, plastic material, the known assembly is useless.

Finally, the valve plate has a protruding nose that slides back and forth between two guide ribs in the tube bend. In particular, the intermediate guide ring will be easily soiled in its lower part, so that a secure closure of the valve cannot be achieved, as the valve plate will thereby close warped, ie without completely closing the system.

"3 - 144710

The object of the present invention is to provide a valve assembly of the present type with a hand operated shut-off valve and a self-acting contract flap which can be easily and inexpensively and yet satisfactorily mounted tightly in a well. Furthermore, the design in question must have low build height and smooth passageways, so that a safe and lasting functionality is achieved. Finally, the unit should include a water trap.

This is achieved by the construction of claim 1.

In this construction, there are smooth passages for the waste water, and the unit can easily be mounted close to the well wall with the drain opening. Also, the seal of the valve plate activating spindle is extremely simple and of low build height.

The specified assembly consists of only a few parts and can be easily dismantled, thereby also removing the contract flap from the drain channel, so that it is freely accessible for cleaning. The valve plate movable from the bottom upwards towards the valve seat offers the advantage that the valve is self-cleaning, so that interference due to connection or soiling is substantially avoided. It is also a significant advantage that all individual parts can be made of plastic material and that the valve spindle is protected from the bottom of the spindle nut so that the risk of corrosion is eliminated.

Negligible rotation of the spindle-actuating handwheel may cause the valve spindle to rotate out of engagement with the nut. This causes the valve plate to fall to the bottom of the drain well or container, after which the valve cannot be closed. This risk can be eliminated according to the invention by designing the assembly as claimed in claims 2 or 4.

According to the invention, it is advantageous for the valve assembly to be designed as claimed in claim 5. In this construction, a safe control of the valve plate is obtained during its movement, and the spindle does not appear to be distorted in the nut, which could hinder or prevent the valve from being pressurized. The valve guide also causes the valve plate to be pressed uniformly against the valve seat.

144710 - 4 -

In order to obtain an impeccable seal which, for example, in the event of floods, can withstand significant counter pressure for a long period of time, it is advantageous according to the invention that the valve assembly is designed as stated in claim 6. The form-fitting packing ring is in its ring groove excellent secured against removal.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be explained in more detail in connection with the drawing, in which: FIG. 1 is a partial sectional view of a drainage well with a valve assembly according to the invention; and FIG. 2 is a section perpendicular to the sectional surface of FIG. First

The drawing shows a portion of a drain well 10 to which is accessed through a removable cover 11, and from which a sloping downward drain channel 12 is ejected. Under the mouth of the drainage channel 12, in the well 10 is a pocket 13 where a valve assembly 15 can be suspended and secured by screws 16. The valve assembly 15 comprises a 90 ° pipe bend 17 with drainage pipe 18 and inlet pipe 19. In the upper side of the drainage pipe 18 there is a bore 20 , in which a spindle nut 21 with handwheel 25 is sealed tightly against the pipe wall. The spindle nut 21 extends coaxially with the longitudinal axis of the inlet pipe 19 into the tube bend 17. In the lower part of the nut 21 is a valve spindle 22, the lower end of which carries a valve plate 23. Above the valve plate 23 is a valve seat 24, against and from which the valve plate can move. by turning the handwheel 25. Along the edge, the valve plate has a circumferential ring groove 26, in which is mounted a rubber gasket ring 27 of rectangular cross section. From the valve plate 23, a spacer 28 extends axially down to the bottom of the well 10 to limit the movement of the valve plate 23. The mouth 30 of the drain pipe 18 is surrounded by a flange 31 integral with the pipe bend. Below, the flange 31 enters an insertion nose 14, which lies in a tangential plane to the inlet pipe 19. This insertion nose 14 is received in the pocket 13 when the valve assembly 15 is mounted «in the well 10. By means of a packing ring 32, the interior of the well 10 is sealed to the drain channel 12. .

144710 - 5 -

At the edge over the orifice 30 of the drain pipe 18, the flange 31 is provided with a hinge bearing 33 for a counter flap 34 which can be sealed to cover the pipe mouth 30. The edge area of the flap 34 is bent to provide a secure sealing system at the pipe mouth 30.

In FIG. 2 shows how the inside of the inlet pipe 19 carries longitudinal guide ribs 35 which engage cutouts or noses 36 along the periphery of the valve plate 23 and ensure that the valve plate cannot be rotated. The spacer 28 may, of course, be replaced by abutments on the ribs 35 or in the inlet tube. It is also conceivable that between the spindle 22 and the nut 21 a valve movement limiting stop is incorporated.

The valve assembly shown works as follows. In normal position, the valve plate 23 is guided by the handwheel 25 as far from the valve seat as the spacer 28 or other abutment means allow. Thereby, there is unobstructed access from the well 10 to the drain channel 12, because flowing water can open the flap 34 due to its pressure.

Upon backflow from the drain channel 12, the flap 34 is closed so that water cannot flow from the channel 12 into the well 10.

In case of a persistent risk of backflow, for example by flooding in the drainage system, the cover 11 is lifted and the valve plate is lifted up by means of the hand wheel thus accessible against the valve seat 24.

By loosening the screws 16, the valve assembly 15 can be released and lifted from the well 10. This also allows the drain channel 12 to be freely accessible for cleaning.

In the normal position, ie. with open valve 23,24, the valve assembly 15 shown also serves as a water lock, provided that the liquid level in the well 10 reaches the inlet pipe 19.

All parts of the valve assembly can be made of resin which is corrosion resistant and exhibits little adhesion resistance. Furthermore, by injection molding or deep stretching of plastic, great manufacturing accuracy is obtained, so that the production waste percentage becomes low.