AU2016210670B2 - Plumbing connector having non-return valve - Google Patents
Plumbing connector having non-return valve Download PDFInfo
- Publication number
- AU2016210670B2 AU2016210670B2 AU2016210670A AU2016210670A AU2016210670B2 AU 2016210670 B2 AU2016210670 B2 AU 2016210670B2 AU 2016210670 A AU2016210670 A AU 2016210670A AU 2016210670 A AU2016210670 A AU 2016210670A AU 2016210670 B2 AU2016210670 B2 AU 2016210670B2
- Authority
- AU
- Australia
- Prior art keywords
- valve
- upper chamber
- connector
- chamber
- shielded connector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009428 plumbing Methods 0.000 title abstract description 4
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 238000004891 communication Methods 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 18
- 230000009467 reduction Effects 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 2
- 239000012780 transparent material Substances 0.000 claims 1
- 210000005244 lower chamber Anatomy 0.000 description 54
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000002689 soil Substances 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000012858 resilient material Substances 0.000 description 2
- 210000003323 beak Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/02—Plumbing installations for fresh water
- E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
- E03C1/102—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using an air gap device
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/02—Plumbing installations for fresh water
- E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
- E03C1/104—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using a single check valve
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/077—Arrangement of backflow preventing devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/08—Arrangements for drainage, venting or aerating
- F24D19/082—Arrangements for drainage, venting or aerating for water heating systems
- F24D19/083—Venting arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/02—Fluid distribution means
- F24D2220/025—Check valves
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
- Valve Housings (AREA)
- Lift Valve (AREA)
Abstract
PLUMBING CONNECTOR HAVING NON-RETURN VALVE
The invention provides a connector which comprises:
a. a chamber having an open upper chamber and a lower chamber,
b. an inlet connector and
c. an outlet connector formed in a floor of the lower chamber
wherein the inlet connector is supported above the open upper chamber by one or more arms;
wherein the upper chamber has an upper chamber floor having an upper chamber outlet, the upper
chamber is in fluid communication with the lower chamber by means of the upper chamber outlet;
wherein the upper chamber outlet has a non-return valve which is arranged to open at a pre-selected
pressure; and
wherein the lower chamber forms a flow conduit for receiving the valve when it is open; a shielded
connector comprising a shield and the connector wherein the shield is shaped to cover the open upper
chamber; and a valve assembly for use in the connector or shielded connector wherein the valve
assembly comprises a stem, a biasing member for biasing the valve assembly into a closed position, a
valve disc for sealing the outlet, an upper washer and a lower washer wherein the upper and lower
washers support the valve disc such that the valve disc does not distort in use.
To be accompanied when published with Figure 4 of the accompanying drawings.
1/7
Figure 1
105
110
107
100 160
125 -.... ... ... 155 125
130
A A------ A
135
1655 6 -140
180
183 183A
185
187
120
Description
1/7
Figure 1 105 110
107 100 160 125 -.. . . 155 125
130
A A A------ 135 1655 6 -140
180
183 183A
185
187
[001] The present invention relates to a plumbing device which allows a pressure and/or
temperature relief valve for a high discharge fresh water system to be connected to a waste pipe or
soil stack to provide a visible means of discharge and without the risk of back contamination and
odours.
[002] An example of the use of a relief valve is with an unvented domestic hot water storage
system (UVHWSS) or unvented hot water heater (UVHWH). Such a system typically has a temperature
and/or pressure relief valve connected to a discharge pipe. The regulations for connection of the
discharge pipe to a waste water system are strict because of the risk of back contamination from the
pathogenic water in the waste water system to the fresh water in the storage system. Typically, the
regulations require a tundish to provide a visible point of discharge and the outflow from the tundish to be connected in a particular way to discharge above an external ground floor gulley. Such a
connection requires careful engineering and is expensive to install.
[003] In order to connect the vent valve to a soil stack within a building, arrangements need to be
made to provide an odour trap to prevent any foul gases from the soil stack from entering the
domestic location. On most domestic installations, a water trap would be used to prevent escape of
gases and odours from the soil stack. Typically, a water trap comprises a bended tube in which water
is trapped. A water trap allows passage of liquid and suspended solids but not gases. Generally
speaking, a water trap is not suitable for use with a tundish as it will become ineffective through drying
out. A water trap is also relatively bulky and is not suitable for use in all locations.
[004] A way of ameliorating these problems has been sought.
[005] According to the invention, there is provided a shielded connector which comprises a shield
and a connector which comprises:
a. a chamber having an open upper chamber and a lower chamber,
b. an inlet connector and
c. an outlet connector formed in a floor of the lower chamber
wherein the inlet connector is supported above the open upper chamber by one or more arms;
wherein the upper chamber has an upper chamber floor having an upper chamber outlet, the upper
chamber is in fluid communication with the lower chamber by means of the upper chamber outlet;
wherein the upper chamber outlet has a non-return valve which is arranged to open at a pre-selected
pressure;
wherein the lower chamber forms a flow conduit for receiving the valve when it is open; and wherein the shield is shaped to cover the open upper chamber.
[006] According to the invention, there is also provided a connector which comprises:
a. a chamber having an open upper chamber and a lower chamber,
b. an inlet connector and
c. an outlet connector formed in a floor of the lower chamber
wherein the inlet connector is supported above the open upper chamber by one or more arms;
wherein the upper chamber has an upper chamber floor having an upper chamber outlet, the upper
chamber is in fluid communication with the lower chamber by means of the upper chamber outlet;
wherein the upper chamber outlet has a non-return valve which is arranged to open at a pre-selected
pressure;
wherein the lower chamber forms a flow conduit for receiving the valve when it is open.
[007] According to the invention, there is further provided a shield for a connector having an open
upper chamber wherein the shield is shaped to cover the open upper chamber.
[008] According to the invention, there is also provided a valve assembly for use in sealing an outlet
in a connector according to the invention wherein the valve assembly comprises a stem, a biasing
member for biasing the valve assembly into a closed position, a valve disc for sealing the outlet, an
upper washer and a lower washer wherein the upper and/or lower washer is shaped to support the valve disc such that the valve disc is not distorted in use. In some embodiments, the valve assembly
additionally comprises an additional upper washer to provide extra support.
[009] In some embodiments, the upper and/or lower washers of the valve assembly are shaped to
support the valve disc such that the valve disc is not compressed in use. It has been found that without
the shaped upper and/or lower washer, the valve disc distorts such that the amount of water required
to open the valve may change. In some embodiments, the upper and lower washers and the valve
disc form central apertures for mounting on the valve stem; wherein one of the upper and lower
washers forms a projection around its central aperture and wherein the valve disc aperture is shaped
to receive the projection such that valve disc is supported by the upper and lower washers.
[0010] The advantages of the connector according to the invention include that as it is an adapted
tundish, it is compact and space saving such that it can be used in a restricted location such as with an
under counter water heater. Its simple construction enables it to have a rating for temperatures up
to 100°. Furthermore, by providing the lower chamber with a flow conduit for receiving the opened valve, the connector has an improved flow rate.
[0011] Further advantages include that the shield allows the connector to be used to vent a
domestic boiler pressure relief valve to a waste water drain by preventing a user from inserting their
fingers into the open upper chamber when the connector is in use. This is because the connector
needs to be mounted on an outlet from the boiler which is visible but when it is in use, very hot water
will be passed through the connector. Therefore the shield provides protection for a user from that
water.
[0012] In some embodiments, the shield has a window such that water flow through the upper
chamber can be observed. In some embodiments, the shield may be formed from a transparent
material.
[0013] In some embodiments, the shield has a loose fit on the upper chamber such that the
connector provides a vent to atmospheric pressure. In some embodiments, the shield has a tolerance
fit (for example, a water tight fit) to the upper chamber wherein the shield has an outlet which
provides the shielded connector with a vent to atmospheric pressure. In some embodiments, the
connector and/or shield may have a rubber seal to minimise water spillage where the shield fits to the
upper chamber.
[0014] In some embodiments, the shield is rotatable relative to the connector when fitted thereto.
[0015] In some embodiments, the flow conduit is formed by a wall which is spaced from the valve in use so as to provide a volume for liquid flow. In some embodiments, the flow conduit allows the
valve to open sufficiently to allow a high flow of water. In some embodiments, a high flow rate of
water is a flow rate of over 12 litres per minute, for example a flow rate of from 12 litres per minute,
optionally from 15 litres per minute, optionally from 18 litres per minute to 30 litres per minute,
optionally to 25 litres per minute, optionally to 18 litres per minute. In some embodiments, the
connector according to the invention is suitable for use in venting an unvented boiler or cylinder,
particularly a cylinder having high discharge characteristics such as a Megaflo (registered trademark)
unvented cylinder or modern design unvented boilers.
[0016] In some embodiments, the lower chamber forms a first portion and the flow conduit wherein
the first portion accommodates the upper chamber outlet and the valve when it is closed. In some
embodiments, the first portion has a diameter which is greater than the diameter of the flow conduit
such that there is a step between the first portion and the flow conduit. In some embodiments, the
first portion has a diameter which is the same as the diameter of the flow conduit. In some embodiments, the floor of the lower chamber is a shelving floor. In some embodiments, the lower
chamber floor is arranged between the flow conduit and the outlet connector.
[0017] In some embodiments, the pre-selected pressure is a pressure applied by a flow of liquid
from the inlet such as may be produced by a pressure and/or temperature relief valve in operation.
For example, the pre-selected pressure may be sufficiently high to prevent accidental opening of the
non-return valve (for example due to dust or condensation on the valve) but not so high to restrict
flow of liquid from the inlet such that liquid overflows from the open upper chamber. A skilled person
would be able to determine a suitable pressure.
[0018] In some embodiments, the valve is a lift valve having a valve stem. In some embodiments,
the upper chamber provides one or more ribs to support a valve guide for the valve stem. In some
embodiments, the lift valve has a resilient member to bias it into a closed position. In some
embodiments, the resilient member is arranged on the lift valve above the valve guide. Provision of
a resilient member above the valve guide has the advantage of enabling the valve stem to be self
guiding such that only one valve guide is required.
[0019] In some embodiments, the chamber may be provided as a unitary component or single
piece. Any or any, any combination or all of the open upper chamber, lower closable chamber, inlet
connector, outlet connector and/or one or more arms may be unitarily formed or joined/fused, for
example in a manner that prevents separation without breaking the chamber.
[0020] The invention will now be illustrated with reference to the following Figures of the accompanying drawings which are not intended to limit the scope of the invention claimed:
FIGURE 1 shows a schematic vertical cross-sectional view of an embodiment of the
invention;
FIGURE 2 shows a schematic overhead plan view of the embodiment of the invention; and
FIGURE 3 shows a schematic horizontal cross-sectional view of the embodiment of the
invention taken along line marked A-A' on Figure 1;
FIGURE 4 shows a schematic vertical cross-sectional view of an embodiment of the shielded
connector according to the invention;
FIGURE 5 shows a schematic horizontal cross-sectional view of the embodiment of the
invention taken along line marked B-B' on Figure 4;
FIGURE 6 shows a cross-sectional view of a shield according to the invention;
FIGURE 7 shows a schematic perspective view of the parts from which the shielded
connector according to the invention are constructed; and
FIGURE 8 shows a schematic perspective view of a valve assembly for use in the invention.
[0021] An embodiment of a connector according to the invention indicated generally at 100 is
shown in Figures 1, 2 and 3. Connector 100 has an inlet 105, an upper chamber 162, a lower chamber
182 and a lift valve indicated at 142.
[0022] Inlet 105 is supported above upper chamber 162 by a pair of diametrically opposed arms
125 such that a vertical gap 107 is formed between the inlet and the upper chamber 162. Inlet 105
has an outer thread 110 for engaging with a tap connector (or other pipe fitting) and forms a tapered
beak drip 115 which projects downwards into the vertical gap 107. Arms 125 are arranged so that
horizontal gaps between the arms 125 and the vertical gap 107 are sufficient to provide an air break
to drain, typical for a standard tundish.
[0023] Upper chamber 162 is shaped by circumferential upper chamber wall 165 and a shelving
upper chamber floor 170. Upper chamber 162 has an open mouth for receiving liquid from the inlet.
The upper chamber wall 165 supports arms 125. Upper chamber floor 170 forms upper chamber floor
outlet 175 such that upper chamber floor 170 has an inverted truncated conical shape and such that
the upper chamber floor 170 has a funnel shape for directing liquid to the upper chamber floor outlet 175. Upper chamber wall 165 has three inwardly projecting ribs 130 which support valve guide 135
which is arranged in the centre of the opening to upper chamber 162.
[0024] The lift valve 142 has the following components: a valve stem 140, a valve disc 145, a valve
disc fixing 150, a valve spring 155 and a valve spring clip 160. The valve stem 140 is arranged to run
through valve guide 135. At an upper part of the valve stem 140 above the valve guide 135, valve
spring 155 is arranged on the valve stem 140 and secured to an upper end of the valve stem 140 by
valve spring clip 160. At a lower end of the valve stem 140, the valve disc 145 is secured by valve disc
fixing 150. Valve disc 145 is formed from a resilient material such as a plastics or rubber material, for
example EPDM rubber. In an alternative embodiment, the valve spring 155 may be replaced by a
suitable resilient member as would be known to a person of skill in the art.
[0025] The upper chamber floor outlet 175 forms a valve seat for lift valve 142 and which outlet
175 is normally closed by valve disc 145 which is biased by the valve spring 155 into that position. The
valve spring 155 is arranged to open the lift valve 142 at a pre-selected pressure on the valve disc 145.
[0026] The lower chamber 182 has a ceiling 170, a first tubular lower chamber wall 180 forming a
first lower chamber portion 180A, a horizontal step 181, a second lower chamber wall 183 forming a
lower chamber flow conduit 183A, and a shelving lower chamber floor 185. The ceiling 170 of the
lower chamber 182 is formed by the upper chamber floor 170. The first lower chamber portion 180A
provides a cylindrical volume which receives or accommodates the upper chamber floor 170, upper
chamber outlet 175 and valve 142 in its closed position, particularly valve disc 145 and valve disc fixing
150. In an alternative embodiment, instead of being cylindrical, first portion 180A may have a
polygonal cross-sectional shape. The lower chamber flow conduit 183A provides a cylindrical volume
183A for receiving valve 142 in its open position, particularly valve disc 145, valve disc fixing 150 and
part of valve stem 140. In an alternative embodiment, instead of being cylindrical, flow conduit 183A
may have a polygonal cross-sectional shape. Lower chamber floor 185 shelves to form an opening for
outlet 120 such that lower chamber floor 185 has an inverted truncated conical shape and such that
the lower chamber floor 185 has a funnel shape for directing liquid to outlet 120. Outlet 120 has a
tubular shape, a diameter suitable for attachment to a waste pipe and has a smooth outer surface
suitable for engaging with a push fit or universal fitting (not shown).
[0027] The first lower chamber portion 180A provides a volume for receiving a liquid such as water
discharged through the upper chamber floor outlet 175 when lift valve 142 is opened. Lowerchamber flow conduit 183A has a smaller diameter than the first portion 180A because of step 181. In an
alternative embodiment, the diameter of the flow conduit 183A may be the same as the diameter of
the first portion 180A such that there is no step 181. The diameter of the flow conduit 183A is
substantially greater than the diameter of the valve disc 145, for example 50% to 80% greater,
particularly 66% greater such that a volume for liquid flow is provided between the lift valve 142 and
the second lower chamber wall 183. When lift valve 142 is opened, flow conduit 183A receives lift
valve 142 such that there is free flow of water around lift valve 142 within second lower chamber wall
183. If lower chamber 182 had the typical shape of a tundish, there would be no flow conduit 183A
below first portion 180A but instead there would be a shelving floor.
[0028] The insertion of the flow conduit 183A has surprisingly been found to increase flow rate of
liquids through the connector 100 by 50% compared to the connector disclosed in GB2522634 but
with only a 20% increase in the overall length of the connector 100 (the diameter of the connector
100 being the same as the diameter of the connector of GB2522634). The internal geometry of this region below the valve allows a flow regime to form around the valve within the conduit 183A, which
can increase the maximum flow rate through the connector. In particular, it has been found that water
passing through the valve will impact the open valve disc 145 and thus flow radially outwardly towards the outer wall of the lower chamber before flowing downwards primarily under gravity towards the outlet 120. If unacknowledged, this flow regime can cause choking of the flow and can reduce the effective flow area, for example by causing regions of recirculation or flow stagnation. However the revised geometry shown permits a more continuous flow regime in which the volume of water falling through the flow conduit towards the outlet is sufficient to draw the above water through the upper region of the lower chamber and through the valve opening itself so as to force a regime in which flow through the connector is promoted. Thus any recirculation in the flow regime due to the water flowing radially off the valve disc tends to be an open recirculation permitting through-flow, rather than a closed eddy which would effectively choke the available flow area and back up the flow from the upper chamber.
[0029] The beneficial flow regime is created according to aspects of the invention by any or any
combination of: the ratio of the maximum valve opening distance to the height of the restriction in
the lower chamber diameter, e.g. at 181, 183 or 185; the ratio of the valve diameter/opening to that
of the outlet 120 or lower chamber restriction; the slope of the upper chamber floor 17 and/or lower
chamber ceiling; the reductions in diameter at step 181 or sloped wall 185; and/or the clearance
between the valve disc 145 and the lower chamber wall 180 or 183.
[0030] In one example of the invention, the lower chamber and or flow conduit may comprise first and second reductions in internal flow area and the maximum valve opening distance may lie between
said first and second reductions in flow area.
[0031] In an alternative embodiment, the diameter of valve disc 145 may be less than that for outlet
120 such that the valve spring 155 and/or valve disc 145 may be replaced by removing valve spring
clip 160, allowing the lift valve 142 to drop through outlet 120 and out of the connector 100 so that
one or more of the components of lift valve 142 may be replaced.
[0032] An embodiment of a shielded connector according to the invention indicated generally at
200 is shown in Figures 4, 5 and 6. Shielded connector 200 has a connector 202 and a shield 204.
Connector 202 comprises an inlet 205, an upper chamber 262, a lower chamber 282 and a lift valve
indicated at 242.
[0033] Inlet 205 is supported above upper chamber 262 by a pair of diametrically opposed arms
225 such that a vertical gap 207 is formed between the inlet and the upper chamber 262. Inlet 205
has an outer thread 210 for engaging with a tap connector (or other pipe fitting). Arms 225 are arranged so that horizontal gaps between the arms 225 and the vertical gap 207 are sufficient to
provide an air break to drain, typical for a standard tundish.
[0034] Upper chamber 262 is shaped by circumferential upper chamber wall 265 and a shelving
upper chamber floor 270. Upper chamber 262 has an open mouth for receiving liquid from the inlet.
The upper chamber wall 265 supports arms 225. Upper chamber floor 270 forms upper chamber floor
outlet 275 such that upper chamber floor 270 has an inverted truncated conical shape and such that
the upper chamber floor 270 has a funnel shape for directing liquid to the upper chamber floor outlet
275. Upper chamber wall 265 has three inwardly projecting ribs 230 which support valve guide 235
which is arranged in the centre of the opening to upper chamber 262.
[0035] The lift valve 242 has the following components: a valve stem in the form of a shoulder bolt
240, a valve disc 245, a valve disc fixing in the form of a self-locking nut 250 and a valve spring 255.
The shoulder bolt 240 is arranged to run through valve guide 235. At an upper part of the shoulder
bolt 240 above the valve guide 235, valve spring 255 is arranged on the valve shoulder bolt 240 and
held in place at an upper end of the valve shoulder bolt 240 by a shoulder formation 260 on the valve
shoulder bolt 240. At a lower end of the valve shoulder bolt 240, the valve disc 245 is secured by valve
disc fixing 250. Valve disc 245 is formed from a resilient material such as a plastics or rubber material,
for example EPDM rubber. In an alternative embodiment, the valve spring 255 may be replaced by a suitable resilient member as would be known to a person of skill in the art.
[0036] The upper chamber floor outlet 275 forms a valve seat for lift valve 242 and which outlet 275 is normally closed by valve disc 245 which is biased by the valve spring 255 into that position. The
valve spring 255 is arranged to open the lift valve 242 at a pre-selected pressure on the valve disc 245.
[0037] The lower chamber 282 has a ceiling 270, a first tubular lower chamber wall 280 forming a
first lower chamber portion 280A, a horizontal step 281, a second lower chamber wall 283 forming a
lower chamber flow conduit 283A, and a shelving lower chamber floor 285. The ceiling 270 of the
lower chamber 282 is formed by the upper chamber floor 270. The first lower chamber portion 280A
provides a cylindrical volume which receives or accommodates the upper chamber floor 270, upper
chamber outlet 275 and valve 242 in its closed position, particularly valve disc 245 and valve disc fixing
250. In an alternative embodiment, instead of being cylindrical, first portion 280A may have a
polygonal cross-sectional shape. The lower chamber flow conduit 283A provides a cylindrical volume
283A for receiving valve 242 in its open position, particularly valve disc 245, valve disc fixing 250 and
part of valve stem 240. In an alternative embodiment, instead of being cylindrical, flow conduit 283A
may have a polygonal cross-sectional shape. Lower chamber floor 285 shelves to form an opening for outlet 220 such that lower chamber floor 285 has an inverted truncated conical shape and such that
the lower chamber floor 285 has a funnel shape for directing liquid to outlet 220. Outlet 220 has a tubular shape 287, a diameter suitable for attachment to a waste pipe and has a smooth outer surface suitable for engaging with a push fit or universal fitting (not shown).
[0038] The first lower chamber portion 280A provides a volume for receiving a liquid such as water
discharged through the upper chamber floor outlet 275 when lift valve 242 is opened. Lower chamber
flow conduit 283A has a smaller diameter than the first portion 280A because of step 281. In an
alternative embodiment, the diameter of the flow conduit 283A may be the same as the diameter of
the first portion 280A such that there is no step 281. The diameter of the flow conduit 283A is
substantially greater than the diameter of the valve disc 245, for example 50% to 80% greater,
particularly 66% greater such that a volume for liquid flow is provided between the lift valve 242 and
the second lower chamber wall 283. When lift valve 242 is opened, flow conduit 283A receives lift
valve 242 such that there is free flow of water around lift valve 242 within second lower chamber wall
283. If lower chamber 282 had the typical shape of a tundish, there would be no flow conduit 283A
below first portion 280A but instead there would be a shelving floor. The insertion of the flow conduit
283A has surprisingly been found to increase flow rate of liquids through the connector 200 by 50%
compared to the connector disclosed in GB2522634 but with only a 20% increase in the overall length
of the connector 200 (the diameter of the connector 200 being the same as the diameter of the
connector of GB2522634). The increase in overall length of the connector 100,200 being to provide the connector with a push fit facility. Without the push fit connection, the length of the connector
100,200 would be substantially the same as that disclosed in GB2522634.
[0039] In an alternative embodiment, the diameter of valve disc 245 may be less than that for outlet
220 such that the valve spring 255 and/or valve disc 245 may be replaced by removing self locking nut
250, allowing shoulder bolt 240 and valve spring 255 to drop through inlet 205 and out of the
connector 200 so that one or more of the components of lift valve 242 may be replaced.
[0040] As shown in Figure 6, shield 204 has a frustroconical shape having an upper opening 201
which is shaped to fit over inlet 205 and a skirt 203 which is shaped to cover upper chamber 262 and
has a length approximately the same as the length of arms 225.
[0041] According to aspects of the invention, the shield may be correspondingly shaped with an
upper or open region/chamber of the connector, for example so as to be seated thereon. The shield
may be seated on the arms of the upper chamber and/or a circumferential rim, lip or edge of the
upper chamber, such as an upper surface of a plastic ring forming a portion of the upper chamber. The shield may have a skirt or ledge arranged to be seated over the circumferential rim of the upper chamber. The shield may be loosely seated upon the upper chamber and/or may rest thereon by action of gravity alone in use, e.g. so as maintain the exposure of the upper chamber to ambient.
[0042] A further embodiment of the shielded connector according to the invention is indicated
generally at 300 in Figure 7. The shielded connector 300 has a shield 304 and a connector 302. Figure
7 illustrates the five parts from which the connector 302 is constructed are shown. The five parts are
the upper chamber head 390, the upper chamber body 391, the upper chamber foot 392, the lower
chamber body 393 and the valve assembly 396. The four parts 390,391,392,393, may be joined
together by ultrasonic welding or, in an alternate embodiment, by an equivalent technique as might
be known to a person of skill in the art. The upper chamber head 390 comprises two circular plastic
rings 310,312 which are joined by arms 325. Upper ring 310 is smaller in diameter than lower ring 312
and forms inlet 305 such that upper ring 310 is arranged concentrically above lower ring 312 by arms
325. Upper chamber body 391 comprises an outer circular plastic ring formed by upper chamber wall
365, inwardly projecting ribs 330 mounted on an inner surface of upper chamber wall 365 and valve
guide 335 which is supported by ribs 330. The upper chamber foot 392 provides the upper chamber
floor 370 and upper chamber floor outlet 375. The lower chamber body 393 provides the lower
chamber 382 as described above for the second embodiment. The valve assembly 396 provides the
lift valve 342. Valve assembly 396 is shown in more detail in Figure 8. Valve assembly 396 comprises a valve stem 340 in the form of a shoulder bolt, a valve disc 345, a valve disc fixing 350 in the form of
a self-locking nut, a valve spring 355, a first upper washer 397, a second upper washer 394 and a lower
washer 395. The second upper washer 394 has an inverted top hat shape forming a lower projection
394A. Valve disc 345 has a central aperture 345A which is shaped to receive not only the shaft of
shoulder bolt 340 but also lower projection 394A such that in use, valve disc 345 is supported by
second upper washer 394 and lower washer 395 such that the shape of valve disc 345 is not distorted
when valve disc fixing 350 is tightened on shoulder bolt 340. Additionally first upper washer 397
provides additional support by preventing second upper washer 394 from being pushed up past the
shoulder of the threaded portion of the valve stem 340. The inclusion of separate first upper washer
397 provides a washer function on an upper side of valve disc 345, allowing second upper washer 394
to provide only a supporting function for the valve disc 345. In an alternative embodiment, the first
and second upper washers 394,397 might be arranged below the valve disc 345.
Claims (23)
1. A shielded connector which comprises a connector having:
a. a chamber having an open upper chamber and a lower chamber,
b. an inlet connector and
c. an outlet connector formed in a floor of the lower chamber;
wherein the upper chamber has an upper chamber floor having an upper chamber outlet;
wherein the upper chamber is in fluid communication with the lower chamber by means of the upper
chamber outlet;
wherein the upper chamber outlet has a non-return valve which is arranged to open at a pre-selected
pressure; and
wherein the inlet connector is supported above the open upper chamber by one or more arms thereby
causing a gap between the inlet connector and the upper chamber such that the upper chamber is an open upper chamber,
wherein the lower chamber forms a flow conduit for receiving the valve when it is open; and
characterised in that the shielded connector comprises a shield, wherein the shield is shaped to cover
the open upper chamber and is seated thereon.
2. A shielded connector as defined in Claim 1 wherein the valve is a lift valve.
3. A shielded connector as defined in Claim 2 wherein the valve is a lift valve having a valve
stem.
4. A shielded connector as defined in Claim 3 wherein the upper chamber provides one or more
ribs to support a valve guide for the valve stem.
5. A shielded connector as defined in Claim 3 or Claim 4 wherein the lift valve has a resilient
member to bias it into a closed position.
6. A shielded connector as defined in Claim 5 wherein the resilient member is arranged on the
lift valve above the valve guide.
7. A shielded connector as defined in any one of the preceding Claims wherein the flow
conduit is formed by a wall which is spaced from the valve in use so as to provide an internal radial and/or recirculation flow volume for liquid flow around a valve member of the non-return valve in
an open condition.
8. A shielded connector as defined in any one of the preceding Claims wherein the flow
conduit comprises at least one reduction in diameter beneath the non-return valve, wherein the
maximum opening distance of the valve is above the reduction in diameter and allows the valve to
open sufficiently to allow a high flow of water between the valve and the reduction in diameter,
such as for example a flow rate of 12 litres per minute or more.
9. A shielded connector as defined in any one of the preceding Claims wherein the valve has a
valve disc and where the diameter of the flow conduit is 50% to 80% greater than the diameter of the
valve disc.
10. A shielded connector as defined in any one of the preceding Claims wherein the lower
chamber forms a first portion for accommodating the upper chamber outlet and the valve when it is
closed.
11. A shielded connector as defined in Claim 10 wherein the first portion has a diameter which is greater than the diameter of the flow conduit such that there is a step between the first portion
and the flow conduit.
12. A shielded connector as defined in Claim 10 wherein the first portion has a diameter which
is the same as the diameter of the flow conduit.
13. A shielded connector as defined in any one of the preceding Claims wherein the floor of
the lower chamber is a shelving floor comprising a step and/or angled wall portion.
14. A shielded connector as defined in any one of the preceding Claims wherein the lower
chamber floor is arranged between the flow conduit and the outlet connector.
15. A shielded connector according to any preceding claim, wherein the shield is seated on one
or more of: the arms of the upper chamber, and a circumferential rim, lip or edge of the upper
chamber.
16. A shielded connector as defined in any preceding claim, wherein the shield has a window
such that water flow through the upper chamber can be observed.
17. A shielded connector as defined in any preceding claim, wherein the shield comprises, or is
formed from, a transparent material.
18. A shielded connector as defined in any preceding claim, wherein the shield has a loose fit on the upper chamber such that the connector provides a vent to atmospheric pressure.
19. A shielded connector as defined in any preceding claim, wherein the shield has a tolerance
fit to the upper chamber; and wherein the shield has an outlet which provides the shielded
connector with a vent to atmospheric pressure.
20. A shielded connector as defined in any preceding claim, wherein the open upper chamber,
lower chamber, inlet connector, outlet connector and the one or more arms may be unitarily formed
or joined/fused as a single piece in a manner that prevents separation without breaking.
21. A valve assembly for use in sealing an outlet in a shielded connector as defined in any
preceding claim, wherein the valve assembly comprises a stem, a biasing member for biasing the valve
assembly into a closed position, a valve disc for sealing the outlet, an upper washer and a lower washer
wherein the upper and lower washers support the valve disc such that the valve disc does not distort
in use.
22. A valve assembly as defined in Claim 21 wherein the upper and lower washers of the valve
assembly support the valve disc such that it does not contact the valve stem.
23. A valve assembly as defined in Claim 21 or Claim 22 wherein the upper and lower washers
and the valve disc form central apertures for mounting on the valve stem; wherein one of the upper
and lower washers forms a projection around its central aperture and wherein the valve disc
aperture is shaped to receive the projection such that valve disc is supported by the upper and lower
washers.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB1513876.1A GB201513876D0 (en) | 2015-08-05 | 2015-08-05 | Plumbing device |
| GB1513876.1 | 2015-08-05 | ||
| GB1522290.4 | 2015-12-17 | ||
| GB1522290.4A GB2541476B (en) | 2015-08-05 | 2015-12-17 | Plumbing connector having non-return valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2016210670A1 AU2016210670A1 (en) | 2017-02-23 |
| AU2016210670B2 true AU2016210670B2 (en) | 2021-07-29 |
Family
ID=54063243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2016210670A Active AU2016210670B2 (en) | 2015-08-05 | 2016-08-03 | Plumbing connector having non-return valve |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3128087A3 (en) |
| AU (1) | AU2016210670B2 (en) |
| CA (1) | CA2937884A1 (en) |
| GB (2) | GB201513876D0 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10364559B2 (en) | 2014-01-30 | 2019-07-30 | Russell Winston Armstrong | Plumbing device |
| GB2568065B (en) * | 2017-11-02 | 2022-03-09 | Winston Armstrong Russell | Plumbing device |
| GB2596506B (en) * | 2020-04-03 | 2024-05-29 | Altecnic Ltd | Tundishes |
| CN112169083B (en) * | 2020-10-16 | 2022-09-27 | 上海必趣医疗科技有限公司 | Needleless administration joint with neutral pressure |
| GB2612650A (en) * | 2021-11-09 | 2023-05-10 | Altecnic Ltd | Tundish with integral dry tap |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002018824A1 (en) * | 2000-08-31 | 2002-03-07 | Cherne Industries Incorporated | Air admittance valve assembly |
| DE202005002415U1 (en) * | 2005-02-14 | 2005-04-21 | Hans Sasserath & Co. Kg | Component set for the modular creation of a flow arrangement |
| DE202012103132U1 (en) * | 2012-08-20 | 2013-11-22 | Hans Sasserath & Co. Kg | Drainage arrangement for water fittings |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2522634B (en) * | 2014-01-30 | 2016-04-27 | Winston Armstrong Russell | Plumbing connector having non-return valve |
-
2015
- 2015-08-05 GB GBGB1513876.1A patent/GB201513876D0/en not_active Ceased
- 2015-12-17 GB GB1522290.4A patent/GB2541476B/en active Active
-
2016
- 2016-08-03 CA CA2937884A patent/CA2937884A1/en not_active Abandoned
- 2016-08-03 AU AU2016210670A patent/AU2016210670B2/en active Active
- 2016-08-04 EP EP16182821.5A patent/EP3128087A3/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002018824A1 (en) * | 2000-08-31 | 2002-03-07 | Cherne Industries Incorporated | Air admittance valve assembly |
| DE202005002415U1 (en) * | 2005-02-14 | 2005-04-21 | Hans Sasserath & Co. Kg | Component set for the modular creation of a flow arrangement |
| DE202012103132U1 (en) * | 2012-08-20 | 2013-11-22 | Hans Sasserath & Co. Kg | Drainage arrangement for water fittings |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2541476B (en) | 2018-08-15 |
| GB2541476A (en) | 2017-02-22 |
| GB201522290D0 (en) | 2016-02-03 |
| AU2016210670A1 (en) | 2017-02-23 |
| CA2937884A1 (en) | 2017-02-05 |
| EP3128087A2 (en) | 2017-02-08 |
| GB201513876D0 (en) | 2015-09-16 |
| EP3128087A3 (en) | 2017-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2016210670B2 (en) | Plumbing connector having non-return valve | |
| US10364559B2 (en) | Plumbing device | |
| US7509978B1 (en) | Non-return device | |
| EP3102745B1 (en) | Plumbing device | |
| US4594739A (en) | Protective drain | |
| JP3436839B2 (en) | Reversible vent valve | |
| US2663309A (en) | Vacuum breaker | |
| US6258269B1 (en) | Self vent drain valve | |
| GB2425818A (en) | Set of components for the modular construction of an outlet assembly | |
| US2746477A (en) | Vacuum breakers | |
| WO1996019620A1 (en) | Non-return device | |
| WO1992014888A1 (en) | Waste valve fittings | |
| US11118334B2 (en) | Odor trap device for sanitary fixtures, in particular urinals | |
| JP6837827B2 (en) | Drain trap | |
| US3791401A (en) | Vented sanitary trap unit | |
| JP5901594B2 (en) | Drain trap | |
| US4399832A (en) | Air gap assembly | |
| JP4304369B2 (en) | Floor drain trap with ventilation function | |
| GB2573341A (en) | Plumbing device | |
| JP4184416B2 (en) | Drainage vent | |
| US20240344309A1 (en) | Trap seal protection device | |
| US1676029A (en) | Trap | |
| KR200301744Y1 (en) | A drain trap | |
| JP2021092250A (en) | Float and vent hole sealing float structure | |
| GB2474705A (en) | Drain trap for preventing the backflow of wastewater and odours by means of a float member |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) |