• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Disclosed is a mobile waterworks (1) comprising a water tank (2) for holding a quantum of water and pumping means (3) for pumping water out of the water tank (2). The mobile waterworks (1) also comprises connection means (4) for temporarily connecting the pumping means (3) to a pipe network (5) for distribution of water and it comprises flow monitoring means (6) for monitoring a flow of water from the mobile waterworks (1) to the pipe network (5). Furthermore the mobile waterworks (1) comprises communication means (7) for communicating information regarding the flow to a mobile communication unit (8). A method for locating leaks in a pipe network (5) for distribution of water from a large stationary water supply (16) and use of a mobile waterworks (1) is also disclosed.
    公开号:DK201470537A1
    申请号:DK201470537
    申请日:2014-09-04
    公开日:2016-03-21
    发明作者:Karl Aage Isaksen
    申请人:Aarhus Vand As；
    IPC主号:
    专利说明:

    A MOBILE WATERWORKS, A METHOD FOR LOCATING LEAKS IN A PIPE NETWORK AND
    USE OF A MOBILE WATERWORKS
    Background of the invention
    The invention relates to a mobile waterworks comprising a water tank for holding a quantum of water and pumping means for pumping water out of the water tank. The invention further relates to a method for locating leaks in a pipe network for distribution of water from a large stationary water supply and use of a mobile waterworks.
    Description of the Related Art
    Most modem cities comprise some kind of pipe network (also called a pipeline network, water pipe network, pipe system, water distribution system and other) for distribution of water to the consumers (which may be private houses or industrial, commercial or institution establishments or other) and other usage points (such as fire hydrants).
    The water is usually distributed from a large municipal water supply in underground main pipes from which subsections are branched off to supply local areas where these subsections may be further divided into subparts.
    If the municipal water supply monitors the outgoing water flow it is also possible to detect if leaks occur in the pipe network, but since such a pipe network most often covers many square kilometers and since most or substantially all of the pipe network is buried underground it can be difficult to detect the location of the leaks in the pipe network.
    Thus, from American patent US 5,708,195 it is known to detect and locate leaks in a pipe network by means a plurality of pressure sensors distributed throughout the pipe network. But it is expensive and difficult to install such pressure sensors in existing pipe networks and even in new pipe networks such a system of pressure sensors is difficult and expensive to install and maintain.
    An object of the invention is therefore to provide for a cost-efficient technique for locating leaks in a pipe network.
    The invention
    The invention provides for a mobile waterworks comprising a water tank for holding a quantum of water and pumping means for pumping water out of the water tank. The mobile waterworks also comprises connection means for temporarily connecting the pumping means to a pipe network for distribution of water and it comprises flow monitoring means for monitoring a flow of water from the mobile waterworks to the pipe network. Furthermore the mobile waterworks comprises communication means for communicating information regarding the flow to a mobile communication unit.
    A mobile waterworks enables that an isolated subsection of the pipe network can be pressurized so that the flow into the subsection may be monitored by the monitoring means. If a suspicious (e.g. constant) flow of water into the subsection (from the mobile waterworks) is needed to maintain the subsection pressurized the operator can now move about in the subsection and cut off parts of the subsection. It is advantageous that information regarding the flow from the mobile waterworks to the pipe network can be communicated to the operator via the mobile communication unit in that the operator will quickly and easily be able to tell if a suspicious water flow stops when cutting off a part of the subsection - thus, enabling that the operator can cut off different parts of the subsection and quickly receive information of possible change in flow - indicating that a leak has been located. A further advantage is that by means of the present mobile waterworks the entire leak locating process can be performed by a single operator.
    It should be noted that the term “pumping means’’ in this context should be interpreted as any kind of pump suited for moving and/or pressurizing water, such as any kind of positive displacement pump, impulse pump, velocity pump or other.
    It should also be noted that the term “connection means” in this context should be interpreted as any kind of connector suitable for temporarily connecting the pumping means to a pipe network, such as any kind of snap coupling, threaded connection, quick coupler or other.
    It should further be noted that the term “flow monitoring means” in this context should be interpreted as any kind of flow monitor suitable for monitoring a flow of water from the mobile waterworks to the pipe network, such as any kind of flow sensors, Hall effect sensors, velocimeters or other.
    Even further, it should be noted that in this context the term “communication means” is to be interpreted as any kind of communication device suitable for communicating data regarding the flow to a mobile communication unit, such as any kind of phone system, Wi-Fi based system, radio based systems or other.
    In an aspect of the invention, said mobile waterworks further comprises pressure monitoring means for monitoring a water pressure in said pipe network.
    In certain circumstances it is advantageous to also measure the pressure in the pipe network and it is therefore advantageous to equip the mobile waterworks with pressure monitoring means.
    It should be noted that the term “pressure monitoring means” in this context should be interpreted as any kind of pressure sensor suited for monitoring a water pressure in the pipe network, such as any kind of pressure gauges, manometer, electronic pressure sensors or other.
    In an aspect of the invention, said pumping means is also able to pump water out of said pipe network.
    Providing the mobile waterworks with pumping means capable of pumping water into the pipe network is advantageous, in that when a subsection of the pipe network has been isolated by closing one or more valves, it is important to test if the valves are shutting tight - i.e. to test is the subsection has been properly isolated. This can be done by pumping water from the mobile waterworks into the subsection and then detect if the pressure in the subsection rises as expected. If not - one or more valves are not closed properly.
    In an aspect of the invention, said mobile waterworks further comprises filling means enabling that water can be filled into said water tank from said pipe network.
    Since the waterworks is mobile it can only hold a limited amount of water in the water tank. If the leak location process takes so long that the water consumption in the isolated subsection exceeds the capacity of the tank it is advantageous that the mobile waterworks comprises filling means so that the tank may easily and quickly be refilled. Furthermore, it is advantageous that the water tank can be refilled with water from the pipe network because this is readily available and because the risk of infecting the water with water from a different source is hereby avoided.
    It should be noted that the term “filling means” in this context should be interpreted as any kind of filling device suited for filling into the water tank from the pipe network, such as any kind of pump, valve, water displacement system or other.
    In an aspect of the invention, said mobile waterworks comprises wheels for engaging the underlying ground.
    It is advantageous to provide the mobile waterworks with wheels to make it easy to move around.
    In an aspect of the invention, said mobile waterworks comprises coupling means adapted to fit a tow bar of a vehicle.
    It is advantageous to provide the mobile waterworks with coupling means adapted to fit a tow bar of a vehicle in that it hereby is possible to easily and quickly move the mobile waterworks around by means of a car or a van.
    It should be noted that the term “coupling means” in this context should be interpreted as any kind of coupling suited for connection the mobile waterworks to a tow bar of a vehicle, such as any kind of snap connector, indentation, mechanical connector or other.
    In an aspect of the invention, said mobile communication unit is a mobile phone.
    Mobile phones are simple to use, highly mobile and can be used almost everywhere water is distributed in a pipe network. It is therefore advantageous to communicate the flow data to a mobile phone.
    The invention also provides for a method for locating leaks in a pipe network for distribution of water from a large stationary water supply. The method comprises the steps of: • isolating a subsection of the pipe network from the stationary water supply by closing one or more valves of the pipe network, • connecting a mobile waterworks to the subsection, • pressurize the water in the subsection by means of the mobile waterworks, • monitoring the flow of water into the subsection from the mobile water works, • selectively cutting off parts of the subsection by an operator closing one or more valves in the subsection, and • wirelessly communicating information regarding the flow to the operator.
    By isolating the subsection it is possible to control the pressure and the flow into the subsection. And controlling this by means of a mobile waterworks enables that different subsections quickly can be investigated for leaks. Monitoring the flow into the subsection enables that suspicious changes in the flow - i.e. a disproportionate drop in flow indicating that the leak has been isolated - will be detected as soon as the leaking part of the subsection is cut off and since information regarding the flow is regularly, on demand or continuously communicated to the operator the operator is free to and can quickly move around and test different parts of the isolated subsection so that the leak may easily and quickly be located, substantially without the water consumers in the subsection being affected.
    Thus, if a constant flow of water into the subsection (from the mobile waterworks) is needed to maintain a pressure in the subsection - where a constant flow will stand out compared to the fluctuating irregular flow generated by consumers in the subsection - this will indicate a leak, and if cutting off a part of the subsection result in the constant flow stopping this will indicate that the leak is located in the cut off part which then e.g. can be further investigated to more exactly locate the position of the leak.
    In an aspect of the invention, after said mobile waterworks is connected to said subsection, said method further comprises the steps of: • reducing the pressure in said subsection, and • monitoring the pressure in said subsection.
    Reducing the pressure in the subsection right after the mobile waterworks is connected to said subsection - e.g. by pumping water from the subsection into the water tank or at least allowing water to flow out of the subsection (e.g. by normal water consumption) - after the subsection has been isolated enables that it can easily be tested if the subsection is efficiently isolated - i.e. if the closed valves are in fact closing tight. If the subsection is efficiently isolated the pressure in the subsection should drop below the pressure in the surrounding pipe network and it should remain lower. However if the pressure rises again after being reduced this will indicated that one or more valves are not shutting tight and this problem will have to be addressed before the leak can be located.
    In an aspect of the invention, said water pressure in said subsection is maintain substantially constant by monitoring the water pressure in said subsection and pumping water into said subsection by means of said mobile waterworks if said water pressure drops below a predetermined level.
    Water is occasionally removed from the isolated subsection when consumers in the subsection use water. When the subsection is isolated the water has to be fed into the subsection for the consumers to be unaffected by the leak location process - and to ensure that the pressure doesn’t drop so low that the leaks stop leaking and therefore no longer can be located. It is therefore advantageous to make the mobile waterworks substantially maintain a constant pressure in the isolated subsection.
    In an aspect of the invention, said method comprises at least occasionally filling water from said pipe network into a water tank of said mobile waterworks.
    If a lot of water is consumed in the subsection while being isolated or if the leak location process drags on it is advantageous that the water tank of the mobile waterworks can quickly be refilled by water from the pipe network, e.g. by temporally breaking the isolation of the subsection, by opening a valve to the surrounding pipe network, refill the tank and shutting the valve again to re-isolate the subsection.
    In an aspect of the invention, said method is a method for locating leaks by means of at mobile waterworks according to any of the previously mentioned mobile waterworks.
    Hereby is an advantageous embodiment of the invention achieved.
    The invention further provides for use of a mobile waterworks according to any of the previously mentioned mobile waterworks for locating leaks in a pipe network for distribution of water from a large stationary water supply.
    Large stationary water supplies usually supplies many consumers through a pipe network distributed over a large area - i.e. many square kilometers - and it is therefore particularly advantageous to locate leaks in a pipe network for distribution of water from a large stationary water supply by means of a mobile waterworks according to the present invention because this will enable that a leak easily and quickly can be isolated by a single operator.
    Figures
    The invention will be described in the following with reference to the figures in which fig. 1 illustrates a simplified representation of a pipe network and a large stationary water supply, as seen from above, fig. 2 illustrates a mobile waterworks connected to a pipe network, as seen from the front, fig. 3 illustrates a simplified representation of cross section of a mobile waterworks, as seen from the front, and fig. 4 illustrates a mobile waterworks connected to a pipe network, as seen from the top.
    Detailed description of the invention
    Fig. 1 illustrates a simplified representation of a pipe network 5 and a large stationary water supply 16, as seen from above.
    A water distribution system in a city usually comprises a large stationary water supply 16 from which water is pumped out into one or more main pipes from which a number of sub-pipes branches off, from which a number of sub-sub-pipes branches off and so on, so that the pipe network eventually reached all the water consumers in the area. In this simplified embodiment only major pipes are shown but in a real embodiment the pipe network 5 would typically be much more branched.
    In this embodiment substantially every branch is provided with a valve 18 ensuring that a specific subsection 17 can be isolated from the remaining pipe network 5 by closing the valve 18. And inside this subsection 17 further valves 18 are typically arranged to ensure that specific parts 19 of the subsection 17 can be isolated usually all the way out to a stopcock arranged at the individual water consumers.
    In many pipe networks 5 the valves 18 at the major pipes are provided with an actuating mechanism 23 enabling that the valves 18 can be remotely controlled whereas the valves 18 in the subsections 17 or at least in parts 19 of the subsections 17 usually are manually operated. However, in some embodiments substantially all the valves 18 may be remotely controlled or substantially all the valves 18 may only be manually operated.
    Fig. 2 illustrates a mobile waterworks 1 connected to a pipe network 5, as seen from the front.
    In this embodiment the mobile waterworks 1 comprises wheels 11 arranged at the underside of the mobile waterworks 1 so that the wheels 11 engage the underlying ground 12 and thus makes the mobile waterworks 1 highly mobile. However, in another embodiment the mobile waterworks 1 may be designed to be moved around by a forklift, a pallet truck or other.
    In this embodiment the mobile waterworks 1 is formed as a trailer designed to be towed behind a car, a van, a truck or a similar vehicle 15. However, in another embodiment the mobile waterworks 1 may be equipped - either temporarily or permanently - with a motor enabling that the mobile waterworks 1 is self-propelled.
    In this embodiment the mobile waterworks 1 is provided with standard coupling means 13 enabling that the mobile waterworks 1 may easily be coupled to a tow bar 14 of a vehicle 15.
    In this embodiment the mobile waterworks 1 is provided with connection means 7 enabling that the mobile waterworks 1 may temporarily be connected a pipe network 5 for distribution of water.
    In this embodiment a pipe 5 of the pipe network 5 is buried underground but the pipes 5 are provided with hydrants 20 and similar access points enabling that the mobile waterworks 1 may be coupled to the pipe network 5 from the ground surface. However, among other given the mobility of the mobile waterworks 1 the mobile waterworks 1 may be coupled to substantially any access point of the pipe network 5 - e.g. including on the water installations inside the houses of water consumers, i.e. everything from apartments and single-family house to large factories, farms and other.
    Fig. 3 illustrates a simplified representation of cross section of a mobile waterworks 1, as seen from the front and fig. 4 illustrates a mobile waterworks 1 connected to a pipe network 5, as seen from the top.
    In the embodiment disclosed in fig. 3 the mobile waterworks 1 comprises a water tank 2 from which water can be drawn by means of pumping means 3. A valve 18 is arranged next to the pump 3 followed by flow monitoring means 6 and pressure monitoring means 9 before the water leaves the mobile waterworks 1 through some sort of connection means 4 designed to connected the mobile waterworks 1 to the pipe network 5 (see. Figs. 1, 2 and 4) to establish liquid communication between the water tank 2 and the pipe network 5.
    In this embodiment the pumping means 3, the valve 18, the flow monitoring means 6 and the pressure monitoring means 9 are all connected to a control means 21 capable of controlling the valve 18, the pumping means 3 and other e.g. in response to input from the flow monitoring means 6, the pressure monitoring means 9, from external sensors, from manual input, any combination thereof and/or other.
    In this embodiment the mobile waterworks 1 is also provided with communication means 7 - in this case in the form of a mobile phone communication means 7 capable of communicating data to and receiving data from an external mobile communication unit 8 - which in this case is a mobile phone. Thus, in this embodiment the mobile phone is provided with an application allowing that e.g. data regarding current water level in the water tank 2, measured flow from mobile waterworks 1, measured pressure in pipe network 5 or other can be remotely read by an operator 22 carrying the mobile communication unit 8. In another embodiment these and/or other data may also be communicated to the large stationary water supply 16 or other e.g. for further analysis.
    In this embodiment the mobile communication unit 8 also allows that the mobile waterworks 1 may be remotely operated in that e.g. a desired pressure level may be communicated to the communication means 7 of the mobile waterworks 1, the operator 22 may remotely initiate refilling of the water tank 2 or other operations may be remotely controlled through the mobile communication unit 8.
    However, in another embodiment the mobile waterworks 1 could instead or also comprise other components such as means for analyzing the water, means for logging or performing further analysis of the measured data, filtering means, means for water purification or other and/or the components could be arranged differently in the mobile waterworks 1.
    In this embodiment a typical leak location process starts by the stationary water supply 16 detecting an unusual and/or suspicious pattern in the water flow to one of the main pipes.
    The mobile waterworks 1 is then moved to a hydrant (or similar) inside the possibly leaking subsection 17.
    If the mobile waterworks 1 starts off at the stationary water supply 16 the water tank 2 of the mobile waterworks 1 will typically be filled before departure (since it is the same water there as in the pipe network 5) but if the mobile waterworks 1 starts off at a different place, the water tank 2 will typically not be filled until after arrival to avoid the risk of contaminating the water with outside contaminants.
    The subsection 17 is isolated from the rest of the pipe network 5 by closing one or more valves 18 connecting the subsection 17 to the rest of the pipe network 5. In the embodiment illustrated in fig. 4 this is done by remotely activating the valve actuator 23 on the valve 18 connecting the entire subsection 17 to the remaining pipe network 5.
    The connection means 4 of the mobile waterworks 1 is connected to the hydrant 20 by the operator 22 where after the pump is started so that the water pressure in the subsection 17 is lowered - however, in another embodiment it could also be raised but given the leak this is not as efficient. If the valves 18 - isolating the subsection 17 from rest of the pipe network 5 - are not shutting tight, the pressure will quickly rise (or drop) to the pressure level of the remaining pipe network 5 and the operator 22 will first have to address this issue.
    In another embodiment the pressure test could be a more or less fully automated process run by the control means 21 of the mobile waterworks 1 in response to an input from the operator 22.
    Once it has been confirmed that the subsection 17 is efficiently sealed from the remaining pipe network 5 - or if pressure testing is not necessary or evaluated not to be necessary - the operator 22 will initiate the leak detection by making the mobile waterworks 1 maintain a substantially constant water pressure inside the subsection 17. This can be done by setting a desired water pressure where after the pumping means 3 will pump water into the subsection 17 until the pressure monitoring means 9 detects that the desired level has been reached. Since the subsection is leaking the pumping means 3 will often run more or less constantly to compensate for the water flowing out of the leak - and obviously to compensate for any water consumption inside the subsection 17. The operator 22 can now move freely inside the subsection and in turn close valves 18 inside the subsection 17. After closing a valve 18 the operator 22 will consult the mobile communication unit 8 to check if removing a specific part 19 of the subsection 17 will result in a reduced flow into the subsection 17 from the mobile waterworks 1 - which indicates that the leak is located inside the specific isolated part 19 of the subsection 17. Once it has been identified which part 19 of the subsection 17 the leak is located in the operator 22 can continue the process to narrow the location down to a single string of pipe. If necessary the operator 22 can also open the closed valves 18 to break the isolation of the subsection 17, close one or more valves 18 to isolate the identified part 19 of specific subsection 17, move the mobile waterworks 1 and connect it to a water access point 20 inside the now isolated part 19 of the subsection 17 and run the leak location process again to located the leak more precisely. Eventually and preferably the location of the leak will be narrowed down to a very specific pipe section and the exact location of the leak in this section may be detected by means of know means. This leaking pipe section may e.g. be isolated until it can be dug up and repaired.
    In this embodiment the water tank 2 of the mobile waterworks 1 holds 1,000 liters but it could obviously be both larger or smaller - e.g. if it was arranged on a truck it would most likely hold more.
    If the water tank 2 runs empty before the leak location process is finished the water tank 1 can be refilled by means of filling means 10 of the mobile waterworks 1. In this embodiment the filling means 10 is the pump 3 which is stopped and the valve 18 which is opened to allow the water pressure in the subsection 17 to press water backwards through the pump 3 and into the tank 2 until the tank 2 is full. Once the tank 2 is full the valve 18 is closed and the mobile water works 1 is ready to resume operation in the leak locating process. To compensate for the water drawn from the subsection 17 the isolation of the subsection 17 will have to be broken to allow water from the pipe network 5 to flow into the subsection 17. In another embodiment the mobile waterworks 1 could also or instead comprise filling means 10 in the form of a hose or similar connecting the mobile waterworks 1 to a hydrant of the pipe network 5 outside the isolated subsection 17 and then make the filling means 10 further comprise a valve controlling the flow of water from the hose into the tank 2. It is advantageous to refill the tank 2 with water from the pipe network 5 in that the risk of contaminating the water is severely reduced. However, in another embodiment the water tank 2 could be filled or refilled with water from a source outside the current stationary water supply 16 and pipe network 5.
    The invention has been exemplified above with reference to specific examples of designs and embodiments of mobile waterworks 1, pipe networks 5, stationary water supplies 16 etc. However, it should be understood that the invention is not limited to the particular examples described above but may be designed and altered in a multitude of varieties within the scope of the invention as specified in the claims.
    List 1. Mobile waterworks 2. Water tank 3. Pumping means 4. Connection means 5. Pipe network 6. Flow monitoring means 7. Communication means 8. Mobile communication unit 9. Pressure monitoring means 10. Filling means 11. Wheel 12. Ground 13. Coupling means 14. Tow bar 15. Vehicle 16. Stationary water supply 17. Subsection of pipe network 18. Valve 19. Part of subsection 20. Hydrant 21. Control means 22. Operator 23. Valve actuator
    权利要求:
    Claims (13)
    [1] 1. A mobile waterworks (1) comprising a water tank (2) for holding a quantum of water, pumping means (3) for pumping water out of said water tank (2), connection means (4) for temporarily connecting said pumping means (3) to a pipe network (5) for distribution of water, flow monitoring means (6) for monitoring a flow of water from said mobile waterworks (1) to said pipe network (5), and communication means (7) for communicating information regarding said flow to a mobile communication unit (8).
    [2] 2. A mobile waterworks (1) according to claim 1, wherein said mobile waterworks (1) further comprises pressure monitoring means (9) for monitoring a water pressure in said pipe network (5).
    [3] 3. A mobile waterworks (1) according to claim 1 or 2, wherein said pumping means (3) is also able to pump water out of said pipe network (5).
    [4] 4. A mobile waterworks (1) according to any of the preceding claims, wherein said mobile waterworks (1) further comprises filling means (10) enabling that water can be filled into said water tank (2) from said pipe network (5).
    [5] 5. A mobile waterworks (1) according to any of the preceding claims, wherein said mobile waterworks (1) comprises wheels (11) for engaging the underlying ground (12).
    [6] 6. A mobile waterworks (1) according to any of the preceding claims, wherein said mobile waterworks (1) comprises coupling means (13) adapted to fit a tow bar (14) of a vehicle (15).
    [7] 7. A mobile waterworks (1) according to any of the preceding claims, wherein said mobile communication unit (8) is a mobile phone.
    [8] 8. A method for locating leaks in a pipe network (5) for distribution of water from a large stationary water supply (16), said method comprising the steps of: • isolating a subsection (17) of said pipe network (5) from said stationary water supply (16) by closing one or more valves (18) of said pipe network (5), • connecting a mobile waterworks (1) to said subsection (17), • pressurize the water in said subsection by means of said mobile waterworks (1), • monitoring the flow of water into said subsection (17) from said mobile waterworks (1), • selectively cutting off parts of said subsection (17) by an operator (22) closing one or more valves (18) in said subsection (17), and • wirelessly communicating information regarding said flow to said operator (22).
    [9] 9. A method according to claim 8, wherein after said mobile waterworks (1) is connected to said subsection (17), said method further comprises the steps of: • reducing the pressure in said subsection (17), and • monitoring the pressure in said subsection (17).
    [10] 10. A method according to claim 8 or 9, wherein said water pressure in said subsection (17) is maintain substantially constant by monitoring the water pressure in said subsection (17) and pumping water into said subsection (17) by means of said mobile waterworks (1) if said water pressure drops below a predetermined level.
    [11] 11. A method according to any of claims 8 to 10, wherein said method comprises at least occasionally filling water from said pipe network (5) into a water tank (2) of said mobile waterworks (1).
    [12] 12. A method according to any of claims 8 to 10, wherein said method is a method for locating leaks by means of at mobile waterworks (1) according to any of claims 1-7.
    [13] 13. Use of a mobile waterworks (1) according to any of claims 1-7 for locating leaks in a pipe network (5) for distribution of water from a large stationary water supply (16).
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    同族专利:
    公开号 | 公开日
    DK178462B1|2016-03-29|
    引用文献:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DK201470537|2014-09-04|
    DK201470537A|DK178462B1|2014-09-04|2014-09-04|A mobile waterworks, a method for locating leaks in a pipe network and use of a mobile waterworks|DK201470537A| DK178462B1|2014-09-04|2014-09-04|A mobile waterworks, a method for locating leaks in a pipe network and use of a mobile waterworks|
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