DE102008021949B4 - System for cleaning a canal - Google Patents

Abstract

A system for cleaning a duct, comprising a pressure-generating device (301), a high-pressure hose (103; 200; 309) insertable into the duct and a cleaning nozzle (101; 311) arranged at the duct-side end of the high-pressure hose, the duct cleaning being carried out in the In the cleaning nozzle, a transmitter / receiver arrangement (107) is integrated and on the device (301) also a transmitter / receiver arrangement (102, 110) is arranged, wherein the Transmitter / receiver arrangements (107, 102, 110) are connected via a data transmission line (202), characterized in that the data transmission line (202) is integrated in the high-pressure hose (103; 200; 309) and has only a single electrical conductor, wherein the electrical circuit via a common ground or earth closes.

Description

The The present invention relates to a system for cleaning a Channel.

3 shows the schematic structure of a conventional vehicle 301 for cleaning a canal. The vehicle 301 has a tank 302 on, passing through a partition 303 in a rinse water tank 304 and a receptacle 305 is divided. The rinse water tank 304 is a rinse water high pressure pump 306 , such as As a piston pump assigned, which is capable of generating rinse water pressures up to about 200 bar. Rinse water is via a pipe 307 and a not shown rotary coupling of a reel 308 fed on which a high-pressure hose 309 is wound up. The reel 308 is powered by a hydraulic reel drive 310 driven. At the end of the high-pressure hose 309 is a cleaning nozzle 311 attached. The cleaning nozzle 311 is propelled in an operation by a feed, which is caused by a repulsive effect of the rinse water. Part of the jets of water is in 3 symbolically represented by arrows.

One The problem with channel cleaning is that that it is difficult, the degree of contamination of a channel and determine their causes before and after cleaning. Possible causes the pollution can burst Piping or rooting. In general, with such contaminants, the water in the channel Heavy materials only insufficient transport and it comes to deposits that the pipe system in the worst case completely can clog.

Around to solve this problem, can after cleaning the channel a visual inspection or TV examination, for example with the aid of an inspection camera, which is pushed into the channel. Such an investigation However, it is very complex and associated with high costs, as at huge Pipe diameters only trolley systems can be used.

Recently, cleaning nozzles with an integrated image acquisition system and integrated power supply have been developed to simplify the examination or synchronization of the cleaning process with the image inspection. Such a cleaning nozzle is for example in the DE 102 55 221 A1 described by the applicant and can be easily attached to a high-pressure hose, without the need for additional external wiring or connections for power supply or data transmission. A channel is image-wise detected during its cleaning by the cleaning nozzle, such detection preferably taking place by single shots, which are made at predetermined intervals and stored in a memory integrated in the nozzle. After or even during a cleaning process, the user can take pictures from the cleaning nozzle, such. B. via a wireless local area network (WLAN), read and then has accurate information about a state of the channel.

One Disadvantage of this solution is that in the cleaning nozzle only a limited number of images can be stored and a channel so only in sections can be examined. Due to the lack of connection with the outside world can Furthermore do not transmit real-time or live images become. The reading through a wireless connection, such as a wireless connection, via the also real-time images transferable are, in most cases only possible with a direct visual connection with the cleaning nozzle.

The JP 2001-271982 A discloses a pipe water extraction apparatus which discharges, for example, a water accumulated in a pipe via a suction portion through a hose from the pipe. The pipe water extraction apparatus has a head to which a camera for photographing in the pipeline is attached. Pictures taken through the camera are sent out of the pipeline by a camera cable.

The DE 297 21 528 U1 describes a system for cleaning a channel in which image data of a television camera are transmitted from a high-pressure cleaning nozzle via an electrical line to a receiving device.

used you like extra here Cables for power supply and data transmission, including for transmission can be used by real-time images, this is with further problems connected. Due to the high water pressures (up to 200 bar) caused by a cleaning nozzle exercised in a channel can, can such cables are damaged. Furthermore must for the cables have at least one additional drum for winding and unwinding be provided on a vehicle for cleaning a channel. A such additional drum must be with the reel of the high-pressure hose be synchronized. Laying the cables through to avoid damage the water jet of the cleaning nozzle in the high pressure hose, so can this due to an expansion of the high pressure hose which occurs during the Cleaning occurs, tear.

The object of the present invention be The object of the invention is to provide a system for cleaning a channel, which allows a simple and trouble-free real-time investigation of a channel during its cleaning.

These The object is achieved by a system according to claim 1.

The The invention provides a system for cleaning a channel with a pressure generating device, an insertable into the channel High pressure hose and one at the channel end of the high pressure hose arranged cleaning nozzle, the channel cleaning by emerging from the introduced into the channel cleaning nozzle, strong pressurized water takes place, and wherein in the cleaning nozzle a Transmitter / receiver arrangement is integrated and on the device also a transmitter / receiver arrangement is arranged, wherein the transmitter / receiver arrangements via a Data transmission line connected, wherein the data transmission line is integrated in the high-pressure hose and they only use a single electric Head having, wherein the electrical circuit via a common ground or earth closes.

In the dependent claims find advantageous developments and improvements of specified in claim 1 system.

According to one preferred embodiment of the system of the invention are the transmitter / receiver arrangements for coupling and / or decoupling a signal containing the data transported, with the transmission line capacitively coupled.

One Advantage of this preferred embodiment of the system of the invention is that no slip ring or any other wear-prone and in the rotating reels or rollers of a cleaning vehicle consuming to be integrated customer for coupling and / or decoupling a signal from the transmission line necessary is.

According to one further preferred embodiment of the system of the invention have the transmitter / receiver arrangements LAN modules according to the home plug standard on.

One Advantage of the system of the invention is that a documentation before, during and after cleaning a channel is enabled, and thus one transparent and controllable cleaning result is achieved.

One Another advantage of the system of the invention is that this only a small amount of work, time and investment when cleaning a channel.

One Another advantage of the system of the invention is that no separate, independent TV system is necessary to study a channel.

One Another advantage of the system of the invention is that channels are efficient and thus can be cleaned environmentally friendly.

One Another advantage of the system of the invention is that only a single line or a single electrical conductor for transmission data from, for example, a camera in a cleaning nozzle is needed and this advantageously a part of the high-pressure hose used is, so an effort is significantly reduced.

preferred embodiments The present invention is described below with reference to FIG the attached Drawings closer explained. It demonstrate:

1 an inventive system for cleaning a channel;

2 shows the construction of a conventional high-pressure hose; and

3 shows the schematic structure of a conventional vehicle for cleaning a channel.

1 shows a system according to the invention 100 for cleaning a channel where data is between a cleaning nozzle 101 and a receiving arrangement 102 via a high-pressure hose 103 be transmitted. The cleaning nozzle 101 has an accumulator 104 for storing electric charge, a generator 105 to generate power, an Ethernet-capable camera 106 for capturing images and possibly sound, a Local Area Network (LAN) module 107 and a transformer 108 on. The generator 105 and the accumulator 104 are with the camera 106 and the LAN module 107 connected. The LAN module 107 is via an Ethernet interface (not shown) with the camera 106 connected. The LAN module 107 is also via an output to an input of the transformer 108 connected. An output of the transformer 108 is at a first end of the high pressure hose 103 with an electrical conductor in the high pressure hose 103 connected. The electrical conductor extends over an entire length of the high-pressure hose 103 ,

The power supply for the camera 106 and the LAN module 107 be through the generator 105 and the accumulator 104 ensured. The generator 105 is due to the moving water in the cleaning nozzle 101 powered by a water turbine, as for example in the DE 102 55 221 the applicant is disclosed. At a decreasing water pressure, the accumulator takes over 104 the power supply. At a lack of water pressure for a long time, the camera will 106 and the associated circuits shut off to the accumulator 104 not to discharge deeply.

The receiving arrangement 102 has a transformer 109 , a LAN module 110 , a meter counter 111 , an accumulator 112 and a computer 113 on. A second end or a portion of the high pressure hose remote from the first end 103 is with an output of the transformer 109 connected. An input of the transformer 109 is with an output of the LAN module 110 connected. The LAN module 110 is on the input side with the meter counter 111 , the accumulator 112 and via an Ethernet interface or Ethernet card (not shown) to the computer 113 connected. In the receiving arrangement 102 become the computer 113 , the meter counter 111 and the LAN module 110 preferably by the accumulator 112 energized. The receiving arrangement 102 is preferably on a cleaning system or on the pressure-generating side of a system for cleaning a channel, such as the vehicle 301 in 3 arranged.

When operating the system 100 become images of a channel to be cleaned with the camera 106 and preferably converted into a JPEG (Joint Photographic Experts Group) or MPEG (Moving Picture Experts Group) format and thereby compressed. The compressed data of the images are transmitted through the LAN module 107 modulated and over the transformer 108 to the high pressure hose 103 forwarded. The over the high pressure hose 103 transmitted modulated data or signals are transmitted via the transmitter 109 to the LAN module 110 sent and demodulated there to get the compressed images again. The computer 113 displays and / or records the received images. The meter counter 111 serves to indicate how many meters the cleaning nozzle 101 located in a channel to be cleaned. This information and the time course are determined by the computer 113 recorded and synchronized with the obtained associated image data.

2 shows the construction of a conventional high-pressure hose 200 , The high pressure hose 200 has an inner rubber layer 201 , a conductive reinforcing layer 202 By braiding a metal wire, such as a steel wire, on an outside of the inner rubber layer 201 is formed, and an outer rubber layer 203 as a topcoat.

The reinforcing layer 202 is alternatively provided by spirally winding, etc. of the metal wire.

The coupling between the transformers 108 and 109 ( 1 ) and the high pressure hose 200 or the conductive reinforcing layer 202 can by a direct electrical connection with the metal wire mesh of the reinforcing layer 202 or by a capacitive coupling with a coupling element, such as the cylinder-shaped coupling element 204 that over a line 205 each with the transformer 108 and / or the transmitter 109 connected, be realized.

The coupling between the transformer 108 and the high pressure hose 200 is preferably via a direct electrical connection, wherein output coils of the transformer 108 connected in series and preferably with one end to the metal wire mesh of the reinforcing layer 202 of the high-pressure hose 200 and connected to a common ground or ground by another end. The coupling between the high pressure hose 200 and the transmitter 109 is preferably via a capacitive coupling, output coils of the transformer 109 connected in series and preferably connected at one end to the coupling element and at another end to the common ground or ground.

Alternatively, the coupling element has any suitable shape, such as a cylinder or plate shape, which provides efficient capacitive coupling between the high pressure hose 200 and the coupling element allows. The coupling element has in one embodiment of the invention, a film such. Aluminum, or other suitable material, on top of the outer rubber layer 203 rests and the high pressure hose 200 ( 2 ) encloses.

The high pressure hose is constructed differently in alternative embodiments than the high pressure hose 200 from 2 and, for example, instead of a reinforcing layer 202 made of metal wires or a metal fabric on a reinforcing layer of plastic threads or other threads. In these alternative embodiments, the transformer is for connection 108 and 109 ( 1 ) near the high pressure hose 200 , inside the high-pressure hose 200 enclosed by the inner rubber layer 201 or in the layers 203 of the high-pressure hose 200 a metallic portion, a wire made of a conductive material such as copper, carbon, etc., or the like.

The LAN modules 107 and 110 are preferably LAN modules according to the home plug standard of the Home-Plug-Powerline Alliance, the more common wise to use the power grid of a building o. Ä. For data transmission and thereby mainly for Ethernet and audio transmission can be used. The well-known LAN modules of the Home Plug standard allow the integration of network devices that comply with the IEEE 802.3u standard (MII Host / DTE), such as: For example, Ethernet or Internet Protocol-enabled (IP) cameras. The Homeflug 1.0 standard theoretically achieves a transmission rate of up to 14 Mbit / s and a maximum range of 200-300 m within a single circuit. The newer Home-Plug-AV (Audio / Video) standard uses a bandwidth of max. 200 Mbps or even up to 400 Mbps. For example, this standard allows DVD-quality video streaming.

Of the Superimposed on the home plug standard an existing mains voltage, such. B. of 230 V, carrier frequencies for example, 4.5 to 27 MHz, with the useful signal with a OFDM (Orthogonal Frequency Division Multiplexing) method modulated are. To increase the security of a data transmission can be an encryption be used.

The transformers 108 and 109 are usually in the LAN modules in the home plug standard 107 and 110 integrated and are coupling transformers for coupling and decoupling high-frequency signals in, for example, a home power grid. The LAN modules 107 and 110 have an integrated circuit in the home plug standard, which is an analog, in each case with the transformer 108 or 109 connected front end, which includes the function of a band-pass filter, a digital / analog and analog / digital converter and an amplifier.

at The OFDM method used is the payload to be transmitted with high data rate first to several partial data streams split at low data rate, these partial data streams are everyone for yourself with a conventional one Modulation method, such. B. generally the Phasenumtastung (Engl. Phase shift keying; PSK), binary phase shift keying (Engl. Binary Phase Shift Keying; BPSK), quadrature phase shift keying (Engl. Quadrature phase shift keying; QPSK or 4-PSK) or Quadrature Amplitude Modulation (QAM) etc., modulated with low bandwidth, and subsequently the individual carrier signals added. To the individual carrier signals at the receiver To be able to distinguish demodulation, it is necessary that the carrier signals orthogonal to each other. This causes the carrier signals preferably little influence each other.

Of the Advantage of the OFDM method is that thus the data transmission on the peculiarities of a transmission channel, such as a radio channel, by a fine granulation can be easily adjusted. Is it within the OFDM signal spectrum? to a narrowband disorder, can those carrier signals, which of the errors affected by the data transfer be exempted. The overall data transfer rate drops only a little bit off.

For example, in the present invention, the transmission channel is the metal wire mesh of the reinforcing layer 202 in 2 , Such a transmission channel has a very complicated transfer function, so that an OFDM method is particularly suitable here. The frequency band of the transmission channel is sufficient to transmit compressed image data. Since only one conductor is used, no adjacent channel interference occurs.

The LAN modules 107 and 110 The present invention preferably includes LAN modules dLAN 200 AV from Devolo, in which an OFDM method with 1155 carriers and a plurality of modulation types (1024/256/64-QAM, QPSK, and BPSK) is used. An asynchronous communication with a 128-bit AES encryption is preferred. The connection of the camera 106 and the computer 113 takes place via an Ethernet transceiver (dLAN200 transceiver IP101). The connection of the camera 106 and the computer 113 can alternatively be done via a host controller.

Even though the present invention above based on preferred embodiments is described, it is not limited thereto, but on diverse Modifiable manner.

at alternative embodiments For example, in the case of pipelines for others, the inventions will do so Purposes such. B. purposes of the chemical industry or food industry, used. The cleaning medium is preferably water, however any suitable cleaning agent or water with additives.

As a transmission method In the invention, the OFDM method is preferably used. However, it will alternatively be another suitable transmission method for transmission over a single transmission line, one or more carriers and other carrier frequencies and modulation method used.

100

system

101

cleaning nozzle

102

receiving arrangement

103

High pressure hose

104

accumulator

105

generator

106

IP Camera

107

LAN module

108

exchangers

109

exchangers

110

LAN module

111

Meter counter

112

accumulator

113

computer

200

High pressure hose

201

inner rubber layer

202

reinforcing layer

203

outer rubber layer

204

coupling element

205

management

301

vehicle

302

tank

303

partition wall

304

RinseTank

305

receptacle

306

high pressure pump

307

management

308

reel

309

High pressure hose

310

reel drive

311

cleaning nozzle

Claims (3)

System for cleaning a duct with a pressure-generating device ( 301 ), a high pressure hose ( 103 ; 200 ; 309 ) and arranged at the channel-side end of the high-pressure hose cleaning nozzle ( 101 ; 311 ), whereby the channel cleaning is effected by highly pressurized water emerging from the cleaning nozzle introduced into the channel, and wherein a transmitter / receiver arrangement (in the cleaning nozzle 107 ) and on the device ( 301 ) also a transmitter / receiver arrangement ( 102 . 110 ), the transmitter / receiver arrangements ( 107 ; 102 . 110 ) via a data transmission line ( 202 ), characterized in that the data transmission line ( 202 ) in the high-pressure hose ( 103 ; 200 ; 309 ) is integrated and that it has only a single electrical conductor, wherein the electrical circuit via a common ground or earth closes. System according to claim 1, characterized in that the transmitter / receiver arrangements ( 101 . 107 ; 102 . 110 ) for coupling and / or decoupling a signal carrying the data with the transmission line ( 202 ) capacitive ( 204 ) are coupled. System according to claim 1 or 2, characterized in that the transmitter / receiver arrangements comprise LAN modules ( 107 . 110 ) according to the home plug standard.