EP0672801A2 - Elément de tamis pour caniveaux et dispositif de récupération de l'eau pour véhicule de nettoyage de rues et égouts - Google Patents

Elément de tamis pour caniveaux et dispositif de récupération de l'eau pour véhicule de nettoyage de rues et égouts Download PDF

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Publication number
EP0672801A2
EP0672801A2 EP95810157A EP95810157A EP0672801A2 EP 0672801 A2 EP0672801 A2 EP 0672801A2 EP 95810157 A EP95810157 A EP 95810157A EP 95810157 A EP95810157 A EP 95810157A EP 0672801 A2 EP0672801 A2 EP 0672801A2
Authority
EP
European Patent Office
Prior art keywords
sieve
water
trickle
cleaning
shielding element
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.)
Granted
Application number
EP95810157A
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German (de)
English (en)
Other versions
EP0672801B1 (fr
EP0672801A3 (fr
Inventor
Claus-Detlef Schegk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Frossard Pierre Ch
Original Assignee
Frossard Pierre Ch
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Frossard Pierre Ch filed Critical Frossard Pierre Ch
Publication of EP0672801A2 publication Critical patent/EP0672801A2/fr
Publication of EP0672801A3 publication Critical patent/EP0672801A3/fr
Application granted granted Critical
Publication of EP0672801B1 publication Critical patent/EP0672801B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
    • E01H1/0827—Dislodging by suction; Mechanical dislodging-cleaning apparatus with independent or dependent exhaust, e.g. dislodging-sweeping machines with independent suction nozzles ; Mechanical loosening devices working under vacuum
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
    • E03F7/10—Wheeled apparatus for emptying sewers or cesspools

Definitions

  • the invention relates to a sieve element in drainage troughs and, in an expanded form, to a device for water recovery for street and sewer cleaning vehicles according to the preamble of independent claim 1.
  • Drainage troughs serve as collection containers for cleaning goods or waste, which contain a lot of water, which should run off as much as possible. For example, screenings from sewage treatment plants or suctioned sewer cleaning material are collected in such troughs. Such goods still contain a substantial proportion of water which is to be separated before the troughs are removed in order to use the trough volume primarily for the solids and not to unnecessarily load them with water. At the same time, the dewatering of the goods during storage in the trough constitutes a preliminary drying stage if the goods are subsequently processed, e.g. is burned.
  • drainage troughs In order to allow the water of the collected goods to flow out of the trough, drainage troughs have a perforated plate at least in one wall or corner. However, these perforated plates clog relatively quickly, so that the water drainage is inhibited and the drainage is insufficient. If at all possible, an attempt is then made to scratch out, poke or rinse the perforated plates from inside or outside. In practice, it helps to prevent the perforated plates from clogging too quickly by accumulating a stone layer acting as a coarse filter in front of the perforated plate.
  • the water recovery device contains a multi-chamber system with fineness graded filter walls and downstream backwashable fine filters.
  • the equipment required here is very complex and the device has only limited performance in terms of the volume flow rate of dirty water.
  • the filter walls and the fine filter must be cleaned frequently or replaced frequently.
  • the invention has set itself the goal of a device with improved efficiency at low to create equipment expenditure. Furthermore, it should be possible with the device to also separate large, muddy amounts of dirty water and debris with less water content with sufficient purity in water and solids without the need to use quickly clogging fine filters. It must be ensured that the filtration modules used cause little effort to clean them even under high loads.
  • the device according to the invention is defined in the characterizing part of independent patent claim 1. Preferred design variants result from the dependent patent claims.
  • the relevant part of the road sweeping vehicle consists of the dirt hopper 1, which is mounted on the vehicle frame 2 and can be tilted around a container axis 3 for the emptying process can swing open.
  • a suction pipe 7 protrudes into the dirt hopper 1, the outer end of which is designed as a suction mouth 8 with which the water-sprayed sweepings are sucked from the street surface 9 into the sweepings hopper 1.
  • the suction on the suction mouth 8 is generated by a high-performance blower 10, which communicates with the interior of the dirt hopper 1 via a suction duct 11 communicates.
  • a coarse sieve 12 is arranged in the cover plate 13 of the dirt hopper 1, which in addition to the function as a container wall also serves as a baffle plate, whereupon the suctioned sweepings break down their essential share of kinetic energy.
  • the coarse sieve 12 has the task of preventing that pieces of debris whirling around in the dirt hopper 1 do not get out again via the suction channel 11.
  • the output of the high-performance blower 10 goes into the free atmosphere and can also be directed wholly or in part to support the sweeping process on the street surface 9.
  • Upstream of the dirt hopper 1 is a trickle shaft 15 which is divided by a sieve wall 14.
  • the sieve wall 14 is a vertical partition wall with a plurality of rows (see FIG. 2b) of trickle openings 17 which are shielded by shielding elements 18 aligned with these rows.
  • the sedimentation basin 22 has a bottom plate 24 which narrows conically downward and has a cone angle ⁇ of approximately 60 ° to 150 °.
  • the base plate 24 has a drain member 26, e.g. Tap, flap or slide open.
  • a vertical wall 27 attaches to the funnel-like base plate 24, a container corner 28 being formed between the base plate 24 and the vertical wall 27.
  • a transfer pipe 30 which leads to the process water tank 31 and further to the consumers.
  • T-branches 33, 34 are provided, a magnetic valve 35 being positioned directly behind the settling basin 22 in the transfer pipe 30.
  • the further course of the transfer pipe 30 leads to the first T-branch 33.
  • a vertical line branch runs as a suction line 36 into the lower connection 37 of the process water tank 31.
  • a drainage element 32 for example a tap or a flap, is installed.
  • the solenoid valve 38 is arranged in the course of the suction line.
  • the transfer pipe 30 extends from the T-branch 33 to the second T-branch 34, the service water pump 39 being located between the two T-branches 33, 34.
  • a vertical branch branches off as a feed line 40 to the process water tank 31.
  • the solenoid valve 41 is installed in the feed line 40.
  • a consumer feed line 42 also extends from the second T-branch 34, a solenoid valve 43 also being located in this.
  • Individual lines 45 to 47 lead from a distribution cross 44 to the various consumers 48 to 50.
  • An actuator for example a ball valve 51 to 53, is provided in each individual line to close or open the individual lines 45 to 47 to consumers 48 to 50.
  • the structure of the screen wall 14 can be seen from FIGS. 2a to 2c, the most expedient geometric relationships being described with reference to FIG. 2c.
  • the sieve wall 14 dividing the trickle shaft 15 from the dirt hopper 1 extends between the bottom 19 and the cover plate 13.
  • the sieve wall 14 consists of the sieve plate 54 and the shielding elements 18, which are assigned to the systematic openings 17 provided in the sieve plate 54. Perforated lines 17 or longitudinal slots come into consideration as pouring openings 17. For specific applications, for example when separating sand or fine-grained debris, it can be advantageous to cover the trickle openings 17 with a mesh screen (not shown).
  • each perforated row 55 there is a shielding element 18, which, at an angle downward, canopy-like, shields the perforated row 55 from the dirt hopper 1.
  • the accumulated debris 56 does not completely fill the space below the shielding element 18; an irregular trickle channel 58 remains.
  • the debris 56 is dammed against the sieve wall 14, the debris is held back to the extent that the immediate run-up to the trickle openings 17 remains free, that is, debris 56 can hardly accumulate directly in front of the trickle openings 17.
  • the choice of material for the screen plate 54 and the shielding elements 18 will be based on economic criteria and the required strength.
  • the screen plate 54 and the shielding elements 18 must withstand the dynamic pressure of the debris hill 57, the shielding elements 18 also having to have sufficient stability if, for example, larger stones hit.
  • the dimensioning of the breakthrough depth t is crucially dependent on the length of the shielding element l and the angle of attack ⁇ , in which case it has been assumed that the sieve plate 54 is perpendicular to the floor 19, which serves for an appropriate use of space with regard to the dirt hopper 1 and the trickle shaft 15.
  • a debris mountain 57 will form in the dirt hopper 1, with debris 56 accumulating in front of the sieve wall 14. Due to the repellent shielding elements 18, the space directly underneath the shielding elements and near the sieve plate 54 will not be completely filled with debris 56, but trickle channels 58 will remain free.
  • the debris 56 itself acts as a first filter layer for the escaping water, which accumulates in the trickle channels 58 and runs through the trickle openings 17 in the sieve plate 54 into the trickle shaft 15. Coarse debris parts are retained by the sieve plate 54, while fine-grained material is partially washed away.
  • the water flowing out of the Kehrgutberg 57 passes through the trickle shaft 15 through the drain opening 20, via the drain connection 21 into the pool inlet 23 and finally into the settling basin 22.
  • the fine-grained sweepings 56 that are washed away settles in the depression 25 of the settling basin 22 as a solid layer 62 , while a relatively clean water layer 63 forms over it.
  • the operator receives a changeover signal via contactors (not shown) in the settling tank 22 - triggered when the water level is high - and / or in the process water tank 31 - triggered when the water level is low. Now it is a matter of transferring the recovered water from the settling tank 22 into the process water tank 31. There is a fundamental change in the switching position of the solenoid valves 35, 38, 41 and 43. Now the solenoid valves 35 and 41 are opened and the solenoid valves 38 and 43 are closed. The service water pump 39 thus sucks the water layer 63 out of the settling basin 22 and conveys the water via the feed line 40 into the service water tank 31. During the pumping over, the sweeping process is briefly interrupted.
  • the pumping If the pumping is finished, it will return to the previous operating state hazards. In this way, a large part of the water sprayed through the consumers 48 to 50 is circulated and used several times.
  • the device can also be operated with two separate pumps and a corresponding valve arrangement, so that no switching or sweeping interruption is necessary.
  • the conical base plate 24 has a special function in the settling basin 22. This promotes the settling process, i.e. the precipitation of the fine-grained, swept-away sweepings.
  • the guiding elements 29 are also of essential importance for promoting settling.
  • the arrangement of the guiding elements 29 calms the accumulated solids in the settling basin 22 during the shocks caused by the travel movements and the inflowing flow. Furthermore, the shielding effect of the guide elements 29 prevents substance from the solid layer 62 from also being sucked out of the suction connecting piece of the transfer pipes 30.
  • the process water tank 31 also has a drainage element 32 at the bottom of the countersink 37.
  • a fine filter could also be provided in the course of the feed line 40.
  • the first filtration stage would take place on the screen wall 14, the second filtration stage on the settling tank 22 and the third filtration stage on the possible fine filter.
  • Figure 3 shows that the invention - i.e. the screen wall 114 and the settling tank 122 - can also be used in a sewer cleaning vehicle 100.
  • the structure and function of the structural units essential to the invention are no longer discussed, but only their basic arrangement in a sewer cleaning vehicle 100 is described.
  • a process water pump 139 conveys the water from the tank 131 via a consumer feed line 142 to the consumer 150, here a spray nozzle in a channel 109 to be cleaned.
  • the consumer feed line 142 is designed as a hose from the hose reel 170. With the spray nozzle, a water jet is introduced into the channel 109, and sludge that has settled is thus washed up. This water-solid mixture is sucked off from a suction nozzle 108 and passed through the suction pipe 107 into the cleaning material container 101.
  • the cleaning material container 101 is separated from a trickle chamber 115 by a screen wall 114.
  • the items to be cleaned 156 accumulate in the cleaning container 101, a concentrate layer 157 settling at the bottom, while a less concentrated thin sludge layer 171 forms above it.
  • the concentrate and thin sludge layer 157, 171 accumulate in front of the sieve wall 114, which likewise consists of a sieve plate 154 with flow openings 117 arranged in rows 155 and shielding elements 118 covering this in the manner of a canopy.
  • the thin sludge layer 171 which essentially consists of water and is deposited at the top, will flow through the flow openings 117 in the screen wall 114 in the direction of the flow chamber 115 without a filtration process.
  • the viscous concentrate layer 157 will accumulate on the screen wall 114, the shielding elements 118 not admitting the concentrate to the trickle openings 117;
  • 117 trickle channels 158 are formed immediately before the trickle openings. In this way, the concentrate layer 157 is dewatered without the sieve plate 154 clogging up immediately.
  • a dirty water pump 173 could be switched on, for example, by a float 172 in order to pump dirty water from the trickle chamber 115 through a connecting pipe 121 into the settling tank 122.
  • the second filtration stage takes place in the settling tank 122.
  • a solid layer 162 settles, while a water layer 163 forms over it.
  • a transfer pipe 130 protrudes into the settling basin 122 into the water layer 163 - arranged above the guide elements 129.
  • the clarified water is pumped from the settling basin 122 into the service water tank 131 by means of a clarification water pump 174.
  • a rewindable filter 176 can also be installed in the course of the transfer pipe 130.
  • the solid layer 162 formed in the settling basin 122 can be drained cyclically via a downpipe 175 which attaches to the bottom 125 of the settling basin 122 and leads into the washware container 101.
  • the container is emptied in the usual way, e.g. by means of a pneumatic extension piston or by tipping back.
  • the screen wall 114 and the settling basin 122 on the sewer cleaning vehicle 100 are other options.
  • the screen wall 114 could also be provided in the front part of the vehicle and the settling basin 122 does not have to be placed in or near the service water tank 131. Thanks to the arrangement, it is now also possible to use the rinsing water in sewer cleaning vehicles 100 several times in a circuit with relatively simple means. The withdrawn water is treated with a sufficient degree of purity so that the affected conveying and distribution units are spared when the clarified water is reused.
  • the inventive screen element can also advantageously be used in drainage troughs.
  • at least one outer wall of the drainage trough is formed by the screen wall, the nature and mode of operation of which has already been described with reference to FIGS. 1, 2a and 3. It is also conceivable to design all four walls of the drainage trough entirely or partially as a screen wall. For certain applications, it should be sufficient to provide one or more horizontal or vertical wall strips in the form of the screen wall. A window-like arrangement is also conceivable.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Civil Engineering (AREA)
  • Public Health (AREA)
  • Sewage (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Filtration Of Liquid (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
  • Ceramic Products (AREA)
EP95810157A 1994-03-14 1995-03-10 Elément de tamis, caniveau et véhicule de nettoyage de rues et égouts comprenant un tel élément de tamis Expired - Lifetime EP0672801B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH00742/94A CH690785A5 (de) 1994-03-14 1994-03-14 Siebelement sowie Vorrichtung zur Wasserrückgewinnung für Strassen- und Kanalreinigungsfahrzeuge.
CH74294 1994-03-14
CH742/94 1994-03-14

Publications (3)

Publication Number Publication Date
EP0672801A2 true EP0672801A2 (fr) 1995-09-20
EP0672801A3 EP0672801A3 (fr) 1997-01-22
EP0672801B1 EP0672801B1 (fr) 2002-02-13

Family

ID=4194154

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95810157A Expired - Lifetime EP0672801B1 (fr) 1994-03-14 1995-03-10 Elément de tamis, caniveau et véhicule de nettoyage de rues et égouts comprenant un tel élément de tamis

Country Status (4)

Country Link
EP (1) EP0672801B1 (fr)
AT (1) ATE213296T1 (fr)
CH (1) CH690785A5 (fr)
DE (1) DE59510043D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018110794B3 (de) 2018-05-04 2019-08-22 Verfahrenstechnik Schweitzer Gmbh Vorrichtung zur Förderung und Siebung von entwässertem Klärschlamm
CN113605521A (zh) * 2021-08-13 2021-11-05 阜阳市水利建筑安装工程公司 一种排水式混凝土道路
CN114673249A (zh) * 2022-04-06 2022-06-28 温州凯睿建设有限公司 一种市政下水管道清理装置及其清理方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113250125A (zh) * 2021-06-17 2021-08-13 临汾市知亿科技有限公司 一种防扬尘高效清洁扫地车

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1763773A (en) * 1926-11-01 1930-06-17 Universal Process Company Method of and apparatus for separating solids from liquids
DE709813C (de) * 1938-09-17 1941-08-27 Glanzstoff Ag Klaervorrichtung fuer Fluessigkeiten
FR2215396A1 (en) * 1973-01-29 1974-08-23 Texier Jean Paul Waste water purificn. by sedimentation - with subdivided sedimentation chamber permitting passage of water only
DE3042619C2 (de) * 1980-11-12 1983-02-03 Woma-Apparatebau Wolfgang Maasberg & Co Gmbh, 4100 Duisburg Vorrichtung zur Kanal- und Grubenreinigung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018110794B3 (de) 2018-05-04 2019-08-22 Verfahrenstechnik Schweitzer Gmbh Vorrichtung zur Förderung und Siebung von entwässertem Klärschlamm
CN113605521A (zh) * 2021-08-13 2021-11-05 阜阳市水利建筑安装工程公司 一种排水式混凝土道路
CN114673249A (zh) * 2022-04-06 2022-06-28 温州凯睿建设有限公司 一种市政下水管道清理装置及其清理方法
CN114673249B (zh) * 2022-04-06 2023-11-17 温州凯睿建设有限公司 一种市政下水管道清理装置及其清理方法

Also Published As

Publication number Publication date
CH690785A5 (de) 2001-01-15
EP0672801B1 (fr) 2002-02-13
EP0672801A3 (fr) 1997-01-22
ATE213296T1 (de) 2002-02-15
DE59510043D1 (de) 2002-03-21

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