CA1234659A - Vehicle for use in street cleaning - Google Patents
Vehicle for use in street cleaningInfo
- Publication number
- CA1234659A CA1234659A CA000446975A CA446975A CA1234659A CA 1234659 A CA1234659 A CA 1234659A CA 000446975 A CA000446975 A CA 000446975A CA 446975 A CA446975 A CA 446975A CA 1234659 A CA1234659 A CA 1234659A
- Authority
- CA
- Canada
- Prior art keywords
- gas
- vehicle
- suction
- vehicle according
- vacuum
- 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.)
- Expired
Links
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
- E01H1/0836—Apparatus dislodging all of the dirt by suction ; Suction nozzles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Sampling And Sample Adjustment (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
ABSTRACT
In order to be able to detect leaks in gas mains that are laid under streets and roads in a more economical manner, and yet more frequently, it is proposed that in a motor vehicle that is used for street cleaning operations and having a vacuum pickup system for dust or dirt, which comprises a suction head that glides over the surface of the road, a dirt collection container and an exhaust air system, the vehicle also carries a gas detector, consisting essentially of a gas analyser and indicator, a gas or power supply system and a gas pump, being arranged in a familiar manner within the driver's cab of said vehicle. A
suction device for gases is arranged outside the vehicle in the vicinity of the road surface, by means of which the flow of gas that is to be analysed can be passed to a detector device, for example, a probe or a diffusion head.
In order to be able to detect leaks in gas mains that are laid under streets and roads in a more economical manner, and yet more frequently, it is proposed that in a motor vehicle that is used for street cleaning operations and having a vacuum pickup system for dust or dirt, which comprises a suction head that glides over the surface of the road, a dirt collection container and an exhaust air system, the vehicle also carries a gas detector, consisting essentially of a gas analyser and indicator, a gas or power supply system and a gas pump, being arranged in a familiar manner within the driver's cab of said vehicle. A
suction device for gases is arranged outside the vehicle in the vicinity of the road surface, by means of which the flow of gas that is to be analysed can be passed to a detector device, for example, a probe or a diffusion head.
Description
~234~S~
The present invention relates to a vehicle for use in street cleaning, having a dust or dirt vacuum pickup system comprising a suction head that glides on the surEace of the street, a collection container, and an exhaust air outlet.
Vehicles of this kind are sufficiently well-known.
These vehicles are in constant use for street-cleaning purposes and move essentially along the curbs and lift dust or dirt off the street through a suitable suction system, the suction hose being supported on the surface of the road by a roller or glide system, the required partial vacuum being produced by a fan of suitable dimensions installed in the vehicle.
The dirt that is picked up is moved into a collection container, the exhaust air being passed to the atmosphere through an exhaust line that preferably incorporates a filter.
Vehicles of this sort cover the whole network of roads and streets in communities, cities, and the like, at very short intervals.
DE-AS 17 29 886 describes a vehicle for use in areas where there are known to be leaks in underground gas lines; this vehicle also moves around the road and street network so as to detect leaXs in gas lines. Since vehicles of this kind for detecting leaks in gas mains are relatively costly, and since, in addition, at least one operator is needed to drive the vehicle and one is needed to monitor the appropriate apparatus, the financial costs involved in operating such a gas detection service are considerable. For this reason, there are relatively few such vehicles in operation, so that the monitoring cycle for checking ~YI~
~' 234~t;i9 the road and stree-t networ~ sometimes amounts to several years.
It is the task of the present inven-tion--proceeding ~rom a state of the art in accordance with -the above described type--to provide a vehicle that combines the advantages of a street-cleaning vehicle and a gas detection vehicle, and which thereby effects a considerable reduction in personnel costs and, effects a considerable reduction in the number of such vehicles which is required.
The present invention provides a motor vehicle for use in street cleaning operations, said vehicle having a vacuum pickup system for dirt or dust comprising a suction head that glides on the surface of the street, a dirt collection container, and an exhaust air line, characterized in that the vehicle also carries a gas detector, a suction device for gases being arranged outside the vehicle in the vicinity of -the road surface, by means of which the flow of gas that is to be analysed can be passed to said detector.
Vehicles that are in constant service for street cleaning are thus used as carriers for the gas detector so that there is no need for an additional vehicle for this purpose.
Moreover, the vehicle personnel required for street cleaning oper-ations can at the same time assume responsibility for operating the gas detec-tor so that there will be no increase in personnel costs vis-a-vis simple street cleaning operations. The additional personnel needed up to now for gas detection can thus be dispensed with. In addition, the safety of community gas mains will be considera~ly improved by the system according to the present ! , ~ ~ ., ~, i234659 invention, since the monitoring cycle for gas mains can be reduced to relatively brief periods of a few days or weeks. The method of operation of the gas detector is such that gas samples a~e picked up over the stretches oE road that are to be checked, which is to say, above the stretches of gas main that are to be checked, by a gas pump, by means of probes or the like that are outside the vehicle, and are passed through hoses to the gas analyser within -the vehicle.
While one operator outside the vehicle passes the probe over the s-tretches of gas main, or the probe is installed in the vehicle so that the path followed by the vehicle also determines the path followed by the probe, the vehicle can also perform its cleaning function. The driver of the vehicle can monitor the indicating apparatus installed within the vehicle and record leaks either manually or by means of suitable recording devices.
In a further development, the present invention proposes that the pickup device be arranged in the airstream generated by the vacuum dust pickup system.
In this way, the relatively high vacuum generated by the cleaning machinery is simultaneously used to detect leaks in gas mains, great suction power being available and the quantity of air that is moved per unit time makes it possible to achieve a high level of measuremen-t accuracy.
Under certain circumstances this also makes i-t possible to dispense with a suction system for the gas detector. A so-called diffusion head can be used for this type of detection of leaks in gas mains, detecting gas fractions that pass through the ..~1, , 1~3465g induction system by way of diEfusion. Other known gas detectors can, of course, be utilised. The use of the suction system of the cleaning vehicle means, in addition, that even if the streets are wet it is possible to detect leaks. Up to now, when the road surface has been wet it has for all practical purposes been impos-sihle to detect leaks by using known gas detectors, since -the we-t surface is practically impermeable for gas that escapes frorn the mains. The great vacuum generated by the cleaning machinery contributes to a certain degree of permeability even if the road surface is wet.
An advantageous possibility of -the arrangement is seen in the fact that the detection system is arranged in the induction air current.
Alternatively or additionally it is also possible that the detection system be arranged in the exhaust air flow. This means, in particular, that the flow of air that is directed to the gas detector is not carrying any particles of dirt or dust, so that the gas detector is not su~jected to any great degree of soiling.
Furthermore i-t is advantageous that the detection system be arranged in a bypass to the main line of the vacuum dust pickup system.
This configuration is particularly advantageous if suction probes are used to detect leaks, since the direct arrange-ment o~ the suction probes in the suction system of the cleaning machinery means tha-t the gas pump ~or the suction probes must have a greater capacity than the suction system of the cleaning device.
~234659 By running a bypass line the pressure in this branch line can be reduced and thus the capacity of the suction pump that operates in conjunction with -the suction probe can be reduced.
In this regard it is particularly advantageous that the bypass be shielded from the main line by dust filters or the like.
In this way soiling of the gas detector is avoided to the greatest possible extent. In any case, if diffusion heads are used, soiling will be insignificant since such diffusion heads are rela-tively invuln~rable to soiling. In a fur~her development it is proposed that the pressure generated in the induction or exhaust air systems by the vacuum dust pickup system be reduced in the bypass to such a magnitude that this pressure is lower than the pressure that can be generated by the suction probe or suction system, respectively, of the gas detector.
Finally, it can be advantageous that at several places in the vacuum dust pickup system, particularly in a hose tha-t is connected therein, bypass lines are taken off, these being arranged in a radial and/or axial direction, and combined to Eorm a common supply line for the gas detector. This will make it possible to achieve even greater accuracy when tracing leaks in a system of gas mains.
An exemplary embodiment of the present invention is illustrated schematically in the drawing and is explained in greater detail belo~. The dra~ings shows a vehicle for use in street cleaning operations.
This vehicle has a dust and dirt vacuum device 1 with a suction head 2 that glides or rolls on the surface of the street, - lZ3~65~
and a collection container 3. An exhaust air outlet 4 opens out of -the collection container to the open air.
In addi-tion, the vehicle carries a gas detector 5, it being preferred that said gas detector be arranged within the driver's cab. In addition, the gas analyser and suitable indi-cating devices are arranged within the driver's cab. The gas and power supply units and the gas pump can in like manner be arranged either in the driver's cab or outside the cab. The gas detector that is to be used, that serves especially for the detection of CH4 can operate according to established principles. AS an example, either a so-called suction probe or a diffusion head system can be used.
The detection device of the gas detector is arranged in the flow of air that is generated by the suction system 1, the detection system being connected through a hose-like bypass to the vacuum dust pickup system. The bypass can be shielded from the main line in a suitable manner by a dust filter or the like. The pressure in the bypass, generated by the vacuum dust pickup system in the suction or exhaust systems of the cleaning machinery can be reduced by reducer valves to such a value that it is lower than the pressure generated by the gas pump of the suction probe or suction system of the gas detector, respectively. The advantages inheren-t in this configuration have been described above.
The present invention relates to a vehicle for use in street cleaning, having a dust or dirt vacuum pickup system comprising a suction head that glides on the surEace of the street, a collection container, and an exhaust air outlet.
Vehicles of this kind are sufficiently well-known.
These vehicles are in constant use for street-cleaning purposes and move essentially along the curbs and lift dust or dirt off the street through a suitable suction system, the suction hose being supported on the surface of the road by a roller or glide system, the required partial vacuum being produced by a fan of suitable dimensions installed in the vehicle.
The dirt that is picked up is moved into a collection container, the exhaust air being passed to the atmosphere through an exhaust line that preferably incorporates a filter.
Vehicles of this sort cover the whole network of roads and streets in communities, cities, and the like, at very short intervals.
DE-AS 17 29 886 describes a vehicle for use in areas where there are known to be leaks in underground gas lines; this vehicle also moves around the road and street network so as to detect leaXs in gas lines. Since vehicles of this kind for detecting leaks in gas mains are relatively costly, and since, in addition, at least one operator is needed to drive the vehicle and one is needed to monitor the appropriate apparatus, the financial costs involved in operating such a gas detection service are considerable. For this reason, there are relatively few such vehicles in operation, so that the monitoring cycle for checking ~YI~
~' 234~t;i9 the road and stree-t networ~ sometimes amounts to several years.
It is the task of the present inven-tion--proceeding ~rom a state of the art in accordance with -the above described type--to provide a vehicle that combines the advantages of a street-cleaning vehicle and a gas detection vehicle, and which thereby effects a considerable reduction in personnel costs and, effects a considerable reduction in the number of such vehicles which is required.
The present invention provides a motor vehicle for use in street cleaning operations, said vehicle having a vacuum pickup system for dirt or dust comprising a suction head that glides on the surface of the street, a dirt collection container, and an exhaust air line, characterized in that the vehicle also carries a gas detector, a suction device for gases being arranged outside the vehicle in the vicinity of -the road surface, by means of which the flow of gas that is to be analysed can be passed to said detector.
Vehicles that are in constant service for street cleaning are thus used as carriers for the gas detector so that there is no need for an additional vehicle for this purpose.
Moreover, the vehicle personnel required for street cleaning oper-ations can at the same time assume responsibility for operating the gas detec-tor so that there will be no increase in personnel costs vis-a-vis simple street cleaning operations. The additional personnel needed up to now for gas detection can thus be dispensed with. In addition, the safety of community gas mains will be considera~ly improved by the system according to the present ! , ~ ~ ., ~, i234659 invention, since the monitoring cycle for gas mains can be reduced to relatively brief periods of a few days or weeks. The method of operation of the gas detector is such that gas samples a~e picked up over the stretches oE road that are to be checked, which is to say, above the stretches of gas main that are to be checked, by a gas pump, by means of probes or the like that are outside the vehicle, and are passed through hoses to the gas analyser within -the vehicle.
While one operator outside the vehicle passes the probe over the s-tretches of gas main, or the probe is installed in the vehicle so that the path followed by the vehicle also determines the path followed by the probe, the vehicle can also perform its cleaning function. The driver of the vehicle can monitor the indicating apparatus installed within the vehicle and record leaks either manually or by means of suitable recording devices.
In a further development, the present invention proposes that the pickup device be arranged in the airstream generated by the vacuum dust pickup system.
In this way, the relatively high vacuum generated by the cleaning machinery is simultaneously used to detect leaks in gas mains, great suction power being available and the quantity of air that is moved per unit time makes it possible to achieve a high level of measuremen-t accuracy.
Under certain circumstances this also makes i-t possible to dispense with a suction system for the gas detector. A so-called diffusion head can be used for this type of detection of leaks in gas mains, detecting gas fractions that pass through the ..~1, , 1~3465g induction system by way of diEfusion. Other known gas detectors can, of course, be utilised. The use of the suction system of the cleaning vehicle means, in addition, that even if the streets are wet it is possible to detect leaks. Up to now, when the road surface has been wet it has for all practical purposes been impos-sihle to detect leaks by using known gas detectors, since -the we-t surface is practically impermeable for gas that escapes frorn the mains. The great vacuum generated by the cleaning machinery contributes to a certain degree of permeability even if the road surface is wet.
An advantageous possibility of -the arrangement is seen in the fact that the detection system is arranged in the induction air current.
Alternatively or additionally it is also possible that the detection system be arranged in the exhaust air flow. This means, in particular, that the flow of air that is directed to the gas detector is not carrying any particles of dirt or dust, so that the gas detector is not su~jected to any great degree of soiling.
Furthermore i-t is advantageous that the detection system be arranged in a bypass to the main line of the vacuum dust pickup system.
This configuration is particularly advantageous if suction probes are used to detect leaks, since the direct arrange-ment o~ the suction probes in the suction system of the cleaning machinery means tha-t the gas pump ~or the suction probes must have a greater capacity than the suction system of the cleaning device.
~234659 By running a bypass line the pressure in this branch line can be reduced and thus the capacity of the suction pump that operates in conjunction with -the suction probe can be reduced.
In this regard it is particularly advantageous that the bypass be shielded from the main line by dust filters or the like.
In this way soiling of the gas detector is avoided to the greatest possible extent. In any case, if diffusion heads are used, soiling will be insignificant since such diffusion heads are rela-tively invuln~rable to soiling. In a fur~her development it is proposed that the pressure generated in the induction or exhaust air systems by the vacuum dust pickup system be reduced in the bypass to such a magnitude that this pressure is lower than the pressure that can be generated by the suction probe or suction system, respectively, of the gas detector.
Finally, it can be advantageous that at several places in the vacuum dust pickup system, particularly in a hose tha-t is connected therein, bypass lines are taken off, these being arranged in a radial and/or axial direction, and combined to Eorm a common supply line for the gas detector. This will make it possible to achieve even greater accuracy when tracing leaks in a system of gas mains.
An exemplary embodiment of the present invention is illustrated schematically in the drawing and is explained in greater detail belo~. The dra~ings shows a vehicle for use in street cleaning operations.
This vehicle has a dust and dirt vacuum device 1 with a suction head 2 that glides or rolls on the surface of the street, - lZ3~65~
and a collection container 3. An exhaust air outlet 4 opens out of -the collection container to the open air.
In addi-tion, the vehicle carries a gas detector 5, it being preferred that said gas detector be arranged within the driver's cab. In addition, the gas analyser and suitable indi-cating devices are arranged within the driver's cab. The gas and power supply units and the gas pump can in like manner be arranged either in the driver's cab or outside the cab. The gas detector that is to be used, that serves especially for the detection of CH4 can operate according to established principles. AS an example, either a so-called suction probe or a diffusion head system can be used.
The detection device of the gas detector is arranged in the flow of air that is generated by the suction system 1, the detection system being connected through a hose-like bypass to the vacuum dust pickup system. The bypass can be shielded from the main line in a suitable manner by a dust filter or the like. The pressure in the bypass, generated by the vacuum dust pickup system in the suction or exhaust systems of the cleaning machinery can be reduced by reducer valves to such a value that it is lower than the pressure generated by the gas pump of the suction probe or suction system of the gas detector, respectively. The advantages inheren-t in this configuration have been described above.
Claims (9)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A motor vehicle for use in street cleaning operations, said vehicle having a vacuum pickup system for dirt or dust comprising a suction head that glides on the surface of the street, a dirt collection container, and an exhaust air line, characterized in that the vehicle also carries a gas detector, a suction device for gases being arranged outside the vehicle in the vicinity of the road surface, by means of which the flow of gas that is to be analysed can be passed to said detector.
2. A vehicle according to claim 1, wherein the gas detector comprises a gas analyser with an indicator, a gas or power supply system and a gas pump, arranged in the driver's cab.
3. A vehicle according to claim 1, wherein the detection system is arranged in the current of air generated by the vacuum dust pickup system.
4. A vehicle according to claim 1, 2 or 3, wherein the detection system is arranged in the suction air flow.
5. A vehicle according to claim 1, 2 or 3, wherein the detection system is arranged in the exhaust air flow.
6. A vehicle according to claim 1, 2 or 3, wherein said gas detector is arranged in a bypass to the main line of the vacuum dust pickup system.
7. A vehicle according to claim 1, 2 or 3, wherein the detection system is arranged in the exhaust air flow, said bypass being shielded against the main line by a dust filter or the like.
8. A vehicle according to claim 1, 2 or 3, wherein the pressure, partial vacuum or overpressure generated in the vacuum dust pickup system in the suction or exhaust systems in the bypass is reduced to such a value, that this pressure is lower than the pressure that can be generated by the suction probe or suction system, respectively, of the gas detector.
9. A vehicle according to claim 1, 2 or 3, wherein at several locations of the vacuum dust pickup system bypasses are branched off a hose or the like, these being distributed in the radial and/or axial direction of the hose or the like, these by-pass lines being combined to form a common supply line for the gas detector.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3304355A DE3304355C2 (en) | 1983-02-09 | 1983-02-09 | Street cleaning vehicle |
| DEP3304355.8 | 1983-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1234659A true CA1234659A (en) | 1988-04-05 |
Family
ID=6190367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000446975A Expired CA1234659A (en) | 1983-02-09 | 1984-02-08 | Vehicle for use in street cleaning |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0136307B1 (en) |
| CA (1) | CA1234659A (en) |
| DD (1) | DD215106A5 (en) |
| DE (2) | DE3304355C2 (en) |
| ES (1) | ES277419Y (en) |
| IT (1) | IT1175320B (en) |
| WO (1) | WO1984003114A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29510447U1 (en) * | 1995-06-28 | 1995-09-07 | Hermann Sewerin GmbH, 33334 Gütersloh | Device for locating leaks in underground gas lines |
| CN103410112B (en) * | 2013-08-13 | 2015-04-15 | 中联重科股份有限公司 | Cleaning suction nozzle and cleaning vehicle |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3107517A (en) * | 1960-05-31 | 1963-10-22 | Rayflex Exploration Company | Natural gas leak detection |
| US3416357A (en) * | 1960-05-31 | 1968-12-17 | Rayflex Exploration Company | Gas leak surveying |
| US3364727A (en) * | 1963-12-12 | 1968-01-23 | Heath Survey Consultants Inc | Mobile gas detecting unit |
-
1983
- 1983-02-09 DE DE3304355A patent/DE3304355C2/en not_active Expired
-
1984
- 1984-02-03 DE DE8484900847T patent/DE3463534D1/en not_active Expired
- 1984-02-03 WO PCT/DE1984/000030 patent/WO1984003114A1/en active IP Right Grant
- 1984-02-03 EP EP84900847A patent/EP0136307B1/en not_active Expired
- 1984-02-07 DD DD84259918A patent/DD215106A5/en unknown
- 1984-02-08 CA CA000446975A patent/CA1234659A/en not_active Expired
- 1984-02-08 IT IT19509/84A patent/IT1175320B/en active
- 1984-02-08 ES ES1984277419U patent/ES277419Y/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DD215106A5 (en) | 1984-10-31 |
| IT1175320B (en) | 1987-07-01 |
| IT8419509A0 (en) | 1984-02-08 |
| DE3304355A1 (en) | 1984-08-16 |
| WO1984003114A1 (en) | 1984-08-16 |
| EP0136307A1 (en) | 1985-04-10 |
| DE3463534D1 (en) | 1987-06-11 |
| ES277419U (en) | 1984-07-16 |
| EP0136307B1 (en) | 1987-05-06 |
| ES277419Y (en) | 1985-02-01 |
| DE3304355C2 (en) | 1985-01-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |