JPS5845548B2 - Category information unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a domestic water supply unit having one connection piece each for a water supply pipe and a domestic water pipe, comprising a front pressure gauge, a back pressure needle, a filter, a pressure reducer and a backflow prevention + ) relating to a type having a device.

Domestic water supply units of this type are connected on the front pressure side to a water supply line, for example a public water line, and on the back pressure side to one or more domestic water lines.

The pressure reducer reduces the prepressure to a pressure suitable for domestic water supply lines.

The prepressure and the afterpressure can be read by means of the prepressure gauge and the afterpressure needle, respectively, which are hydraulically connected to both the connecting pipes of the domestic water supply unit, i.e. the supply conduit and the outflow conduit. It is connected.

The filter prevents fine grains and other dirt from reaching the pressure reduction device, which would interfere with its operation.

A backflow prevention device located downstream of the branch point for the backpressure needle in the flow direction prevents backflow from occurring in the event of a low or zero frontpressure.

A disadvantage of known domestic water supply units is that the individual components, such as filters and pressure reducers, have to be assembled on site, which requires installation by specialists and is therefore expensive in technical terms.

Furthermore, known domestic water supply units are relatively long in the direction of the conduit and therefore require a large amount of space.

The object of the invention is to improve the known domestic water supply units and to provide a domestic water supply unit that is easy to assemble and has a short structural length.

To distantly relate to this object, an arrangement according to the invention is such that in order to form a unit, the filter, the pressure reducer and the backflow prevention device have a common casing, which casing is connected to the two connecting pipes. It also has a connecting passage for a prepressure gauge and a postpressure needle fixed to this casing.

In the present invention, a filter, a pressure reducing device, a backflow prevention device,
The front pressure gauge button and the back pressure needle can be pre-swaged and assembled at the factory, and it is only necessary to connect the water supply pipe and the domestic water pipe to the casing of the domestic water supply unit at the installation site.

The housing can have a segmented construction and can also have a removable housing part, preferably in the form of a socket, which serves as a spring cover for the pressure reducing device and also as a jacket for the filter. can.

In one embodiment of the invention, the housing is provided with a sleeve-nut type connection, by means of which the ends of the housing can be easily connected to the water supply line and the domestic water line.

If a common casing is provided for the individual components of this household water supply unit, a compact structure can be obtained.

The two connecting pieces of the housing are preferably arranged coaxially with respect to one another.

In one embodiment of the invention, the filter extends substantially perpendicular to the line connecting the supply and outlet passages of the casing and is mounted at the lower end of the casing.

In short, the filter can be easily enlarged without undesirably increasing the structural length of the domestic water supply unit in the direction of water introduction.

Advantageously, the inlet and outlet of the filter are coupled to a control mechanism of the backwashing device.

During normal operation, the filter arranged upstream of the pressure reducing device is flowed through in one direction, whereas when the domestic water supply unit is switched into the backwashing position, the filter is flowed through in the opposite direction.

This method allows you to wash away dirt that has adhered to the filter.

The back-flowing water and the dirt that has entered this water away from the filter are discharged through an opening in the casing which is open to drain them, this opening being preferably provided in the part of the casing surrounding the filter. It is being

In one embodiment of the invention, the backwashing device has a rotating slide which, when in its working position, comprises a prepressure chamber in the casing and at least a radial through-hole. The outer peripheral surface of the tubular filter is connected to the outer peripheral surface of the filter, and at the same time, the inner chamber of the filter is connected to the inlet side of the pressure reducing device.

In short, when the rotary slide is in the working position, water flows radially into the filter and normally flows out of it axially.

Therefore, dirt adheres to the outer peripheral surface of the filter.

If the rotary slide is in a backwashing device, the inner chamber of the tubular filter is connected to the water supply conduit, so that water flows radially through the filter from the inside to the outside, in this case depositing on the outer circumferential surface of the filter. Dirt is washed away.

Thereby, the waste water generated in the cylindrical annular chamber between the filter and the surrounding casing part can, as already mentioned, be drained off, preferably via a closable opening provided in the casing. be done.

Rotating slides must be properly sealed;
The through-holes of the rotary slide are also configured such that, when they cooperate with the through-holes of the casing, water flows through the filter in opposite directions in the working position and the backwashing position of the rotary slide.

Advantageously, the rotary slide is rotatably mounted directly in the housing of the domestic water supply unit, to which the operating lever is fixed from the outside through the housing.

In a further embodiment of the invention, the operating lever is designed to be removable and can be pressed at one of two fastening points on the rotating slide, one behind the other in the direction of rotation of the rotating slide. One casing slit is arranged in the casing at a position corresponding to each of these fixing points.

In this case, the operating lever is inserted into the fixing screw hole provided on the rotary slide through the casing slit on either side, and depending on the fixing screw hole selected, the operating lever can be turned clockwise or counterclockwise. The number of rounds is determined.

If the rotary slide is arranged coaxially with respect to the filter and also with respect to the longitudinal axis of the pressure reducing device, the operating lever 1yE in the working position of the domestic water supply unit extends horizontally and pivots in a horizontal plane. It is advantageous if the configuration is such that this is possible.

Both coussing slits can also be connected,
In this case, the end of each casing slit can be used as a rotating slipper.

In the case of a counterclockwise mechanism, the rotary slide is rotated from right to left for backwashing, and in the case of a clockwise mechanism, it is rotated from left to right.

The distance between the two rotational positions of the rotary slide corresponds approximately to the distance between the two housing slots.

In one embodiment of the invention, the rotary slide is connected to a rotatable closure element for the casing, for example a plug element.
, in which case the plug member is in the closed position when the slide is in the working position.

That is, when the rotary slide moves from its working position to the backwashing position, the plug member simultaneously moves from the closed position to the open position, so that special measures have to be taken to drain the waste water during backwashing. There is no.

In one embodiment of the invention, the plug member is arranged coaxially with respect to the rotary slide at the lower end of the preferably removable casing part surrounding the filter, the plug member and the rotary slide being connected to the filter. are connected by a rod passing through them in the axial direction.

In one embodiment of the invention, the actuating lever of the rotary slide extends in the direction of the connection piece for the domestic water line in the working position, whereas in the backwashing position it extends at an angle 9
Take a position shifted by 0°.

This arrangement of the operating lever makes it possible to clearly distinguish whether the rotary slide is in the working position or in the backwashing position.

Furthermore, if the operating lever is located as close as possible to the domestic water line, damage to the rotary slide and accidental rotation are prevented.

The invention will now be explained with reference to the illustrated embodiment.

The housing 1 of the domestic water supply unit according to the invention is provided with a connection piece 2 for a water supply line (not shown) and a connection piece 3 for a domestic water line (also not shown).

Each connection has a sleeve nut type joint 4 or 5.
It is carried out by

The front pressure prevailing in the supply passage 6 is indicated by the front pressure gauge 7, and the pressure prevailing in the outflow passage 9 on the upstream side of the backflow prevention device 10 is indicated by the rear pressure gauge 8.

Water flows into the domestic water supply unit in the direction of arrow 11.

The water first flows through a vertically extending channel 12 of a rotary slide 13, which is rotatably and axially mounted in a housing body 14.

Axial fixation is provided by a sealed central screw 15, which is screwed into a thread 16 of the housing 1.

Two rubber-elastic sealing rings 17, 18 arranged at a distance from each other serve as sealing elements for the rotating slide 1.
These seal rings 1 are inserted into the miso of 3.
7.18 cooperates with the cylindrical surface 19 of the casing 1.

The sealing ring 18 is located above the housing slits 20, 21, which are arranged in the same horizontal plane and is formed into the housing main part 14 during casting or by machining or machining. It is provided by and extends over an angular range of approximately 9000 degrees.

An operating lever 22 extends through these casing parts 20, 21, which is approximately designated 23.
It can be screwed into either one of the two fixing screw holes 24 (FIG. 1) provided in the rotating slide 13 at the intervals shown in FIG. 3 (FIG. 3).

The rotating slide 13 is rotated starting from the connecting web 25 in the housing slot 20 or 21 by approximately an angle 900 to the left or to the right.

That is, depending on which of the two fixing screw holes 24 the operating lever 22 is fixed to, the domestic water supply unit can be configured to have a clockwise rotation mechanism or a counterclockwise rotation mechanism.

If the operating lever 22 is located parallel to the sleeve 26, i.e. parallel to the outflow channel 9 of the domestic water supply unit, the rotary slide 13 is in the working position, while the operating lever 22 is in the plane of the drawing. The rotary slide 13 is in the backwashing position when it is perpendicular to the rotary slide 13.

In the working position of the rotating slide 13 shown in FIG. 1, the incoming water flows through the channel 12 and then into the annular chamber 2
Reach within 7.

This annular chamber 27 is composed of a bottom casing 28 in the shape of a pot and a cylindrical wall of a filter 290.

The water then flows radially from the outside to the inside as shown by arrows 30.

The bottom 31 of the filter 29 has no through-holes for water.

The upper end of the filter 29 is connected to the additional part 32 of the rotating slide 13.
It is inserted into the top without any gaps.

Water passes through this additional part 32 and through both through holes 33, 34.
(FIG. 3) and through holes 35.36, which are connected to these through holes 33.34 by the rotary slide 13 in the working position, in the direction of the arrow 43.44. Flow inward.

This housing interior space 37 also forms the prepressure chamber of the pressure reduction device 38 .

After flowing through the valve seat 39 of the pressure reducing device 38, the water reaches the outlet channel 9 under reduced pressure.

From here the water flows through the valve seat 40 of the backflow prevention device 10 and into the domestic water line, not shown.

In this case, the pressure reducing device 38 and the pressure reducing device 4 of the backflow prevention device 10
The closing mechanism 41 for 2 and 2 assumes a partially closed or completely open position in each case.

When the rotary slide 13 is in the backwashing position, the rotary slide 130 through hole 33 or through hole 3 depending on the direction of rotation.
4 connects with the supply passage 6.

Accordingly, the passage 12 connects to a through hole 35 or 36 in the main body 14 of the casing.

As a result, water flows through the rotary slide 13 in the direction opposite to the arrows 43 or 44 and thus reaches the inner chamber of the filter 29.

The filter 29 is in this case flowed through from the inside to the outside in the opposite direction of the arrow 30, ie water flows into the annular chamber 27.

In this case, the dirt deposited on the outer circumferential surface 45 of the filter 29 is separated and mixed into the outflowing water.

This waste water is removed in a suitable manner. It is undesirable to exclude waste water via the outflow channel 9, since the pressure reducing device 3, which is usually protected from contamination by a filter 29, is undesirable.
8 and the backflow prevention device 10 will be contaminated.

For this reason, it is advantageous if the lower housing part 28 has at least one outlet 46, which outlet 46 is shown in FIG. 1 offset by an angle of 90 DEG from its actual position.

The outlet or outlets 46 are connected to the lower casing 2.
Plug member 47 is rotatably supported within 8 and has a watertight structure.
or the like, which is closed and opened in the backwash position.

In one embodiment of the invention, the plug member 47 is non-rotatably connected to the rotary slide 13 via a rod 48.

This connection is achieved, for example, by means of ribs 49.

A hole 50 in the plug member 4γ is assigned to each outlet 46.

Due to the extension of the filter 29 at the lower end of the casing 1 and the arrangement of the pressure reducing device 38 at the upper end of the casing 1, the domestic water supply unit according to the invention has a relatively short structural length. It is advantageous because there are

Moreover, all parts are easily accessible and can be easily repaired or replaced.

The structures of the pressure reducing device 38 and the backflow prevention device 10 are conventional.

Moreover, the backflow prevention device 10 can also be configured in one piece so that it can be easily replaced.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a domestic water supply unit according to an embodiment of the present invention in the working position, FIG. 2 is a cross-sectional view of the rotary slide perpendicular to the drawing plane of FIG. 1, and FIG. 2 is a cross-sectional view of the main part of the casing, similar to FIG. 2. 1... Casing, 2, 3... Connection pipe piece, 4, 5...
...Connection part, 6... Supply passage, 7... Front pressure gauge, 8.
... Back pressure needle, 9... Outflow passage, 10... Backflow prevention device, 11... Arrow, 12... Passage, 13... Rotating slide, 14... Main part of casing, 15...・Screw, 16... Threaded portion, 17° 18... Seal ring, 19... Surface, 20, 21... Casing slit, 22... Operation lever, 23... Code, 24...・
-Fixing screw hole, 25...Connecting web, 26...Sleeve, 27...Annular chamber, 28...Casing lower part, 29...Filter, 30...Arrow, 31...Bottom part , 32... additional part, 33, 34, 35, 36...
Through hole, 37...Casing inner chamber, 38.42...
Pressure reducing device, 39, 40... Valve seat, 41... Closing mechanism, 43° 44... Arrow, 45... Outer peripheral surface, 46...
- Discharge port, 47... Plug member, 48... Rod, 49
...Rib, 50...hole.

Claims (1)

[Claims] 1. For domestic water supply units of the type consisting of a water supply line and a connection piece for the domestic water line, a prepressure gauge, a backpressure needle, a filter, a pressure reducer and a backflow prevention device. The main casing part 14, which forms the upper half of the casing 1, has the pressure reducing device 38 assembled in the upper center of the casing 1. The connection tube pieces 2 and 3 are formed horizontally and coaxially with each other, separated on both sides with a connection tube piece 2 for a water supply pipe.
The front pressure gauge 7 is installed on the top, and the back pressure needle 8 is installed on the connecting pipe piece 3 for domestic water pipes, and the back pressure gauge 7 is installed inside the connecting pipe piece 3 for domestic water pipes. A prevention device 10 is assembled, and a rotary slide 13 for backwashing is coaxially supported on the casing main part 14 below the pressure reducing device 38. One operation lever 22 is coupled to the button by penetrating the wall of the section 14,
A tubular filter 29 is disposed coaxially with the rotary slide 13 in the cup-shaped casing lower part 28 following the casing main part 14, and the upper end of this filter 29 is connected to the central additional part of the rotary slide 13. 32 , the rotary slide 13 is inserted into the working position from the supply channel 6 in the connecting tube 2 to the annular chamber 27 outside the filter 29 and then from the inner chamber of the filter 29 to the pressure reducing device 38 . The flow passes through to the inlet side and in the backwashing position from the supply channel 6 into the inner chamber of the filter 29 and then into the outer annular chamber 27, the rotary slide 13 is connected to the lower part of the casing 2.
A rotatable plug member 47 for the outlet provided at the lower end of 8
A domestic water supply unit characterized in that the water supply unit is connected to the filter 29 via a rond 48 that passes through the filter 29.