DE8903134U1 - Sewer cleaning vehicle - Google Patents

Abstract

The sewer cleaning vehicle has an intermediate compartment (22) connected between those for slurry and water, and an additional front compartment (24) connected between it and the slurry compartment (14). Three pipes (32,66,76) connect the compartments, which are set in a row in a common tank (10), with the water compartment (82) in two parts at the tank sides. The first and third pipes each contain a low-pressure pump (42,78) below the tank, and the second filter (44) is in the front compartment above the bottom, the first pipe discharging above the periphery of its drum (48). The second pipe leads from the filter to the intermediate compartment, and a suction pipe (58) extends from the bottom of the front compartment below the filter back to the top of the slurry compartment.

Description

TECHNICAL AREA

The invention relates to a sewer cleaning vehicle with a sludge compartment that can be closed by a pivoting tailgate and a service water compartment, both of which are connected by pipes . In the sludge water compartment 1 there is a first filter for coarsely sieving the sludge present in this compartment. the sludge water sucked in from outside the vehicle through the mud hose. This line also contains a second filter in the form of a rotating sieve drum fitted with scrapers. In the other line leading away from the service water compartment A high pressure pump is installed.

With the sludge hose lowered into a sewer or similar, the sludge water present there can be sucked into the sludge water compartment under vacuum This sludge water is pumped into another service water compartment, where it flows through several filter systems. The service water is therefore relatively clean compared to the sludge water, so that it cannot be disposed of but can be reused. This service water can be High pressure pump into a flushing hose, which is equipped with a nozzle head and is also lowered into the sewer to be cleaned. With the help of the pressure jet emerging from the nozzle head, the solid sludge in the sewer is loosened and drawn to the sewer shaft, so that it can be sucked out through the mud hose.

ASSM-Ü4;jDE 13 March 1989

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-2-STATE OF THE ART

Such a sewer cleaning vehicle is known from DE-OS 31 40 200. The sludge water compartment and the service water compartment are located one above the other in a common tank container in this vehicle. The common partition between the two compartments is designed in the form of a piston that can be moved lengthways in the tank, so that by moving this piston, one compartment can be made smaller in volume and the other compartment can be made correspondingly larger. In the service water compartment 1 there is a rotating sieve drum equipped with scrapers for fine sieving, over the outer surface of which the supply line leading from the sludge water compartment to the service water compartment ends. The cleaned water accumulating inside this sieve drum is led away from the service water compartment and to the high-pressure pump. In front of the inlet opening of the pipe leading from the sludge water compartment to the service water compartment, an intermediate wall in the form of a coarse sieve is installed in the sludge water compartment, through which the outlet opening is kept free of the sludge settling in the sludge compartment and other impurities.

The high-pressure pump can only draw water from the service water compartment through the sieve drum. The delivery rate therefore depends on the performance of this filter. Additional extraction directly from the service water compartment is not planned and does not make sense. because the dirt scraped off the surface of the sieve stream 1 by its scrapers is present in the water accumulated in the service water compartment 1. The water present in the service water compartment therefore does not form a real water reservoir for feeding the high-pressure pump.

ASSM-OAgDE March 13, 1989

DESCRIPTION OF THE INVENTION

Based on this prior art, the invention is based on the object of specifying a sewer cleaning vehicle of the type mentioned at the beginning, which does not have the disadvantages known from the prior art and which can be used optimally.

This invention is characterized by the features of the main claim

]0. The Ka' ^{1 1} I cleaning vehicle known from the state of the art is characterized in particular by the fact that in the common tank container the sludge water compartment, an intermediate compartment and a further front compartment, each lying in a row one behind the other, are present. The actual The service water compartment is formed by two additional tanks located on the side of this tank. The second filter, designed in the form of a rotating sieve drum, is located in the front compartment, above the bottom of the tank. The purified water leaving this filter is fed into the intermediate compartment, while the dirt resulting from the filtration collects in the floor area of this front compartment and cannot flow into the intermediate compartment. A suction line also leads from the floor area of this front compartment into the waste water drain - part so that the dirt that accumulates is returned to the sludge water compartment and cannot be carried further along the pipe system to the service water compartment. The water that accumulates there is then led from the intermediate compartment through a separate pipe into the service water compartment. tanks. Process water can therefore be drawn from the tanks by the high-pressure pump regardless of whether the rotating screen drum is in operation at that moment or not. In the sewer cleaning vehicle according to the invention, the process of recycling the The sludge water that has accumulated is spatially and functionally separated from the process of extracting the domestic water by the several different water compartments that are present. The domestic water tanks are also never filled with

A5SM-04gDE . March 1989

■sludge water, so that your cleaning can be carried out without any problems. This has the advantage that the initial supply of the sewer cleaning vehicle with

_- Drinking water can be pumped into these tanks. Ub

In order to prevent the filter in the front compartment from being flooded by the dirty water that has collected in the floor area of ^this compartment, an upper float switch is provided so that when the water level in the front compartment reaches a certain maximum, the pump in the line leading to the front compartment is switched off. In addition, there is another float switch which closes the suction line leading to the sludge water compartment when the dirty water level in the front compartment reaches a certain minimum. If there is a vacuum in the sludge water compartment, a vacuum cannot be created in the front compartment through the suction line.

In order to improve the quality of the water, a

Another feature of the invention is that a further filter is installed in the pipe leading from the intermediate compartment to the service water tanks. This filter acts as a fine filter and removes

"The dirt particles larger than 0.08 mm are removed from the contaminated water. These dirt particles can still migrate through the screen drum upstream of the flow, as it can only filter out dirt particles up to approximately 0.3 mm in size. This in the line

^ _n tung to the domestic water tanks be fi &igr; d1i c he fine filter is automatically monitored in terms of its effective filter surface. This monitoring controls the cleaning process of the filter surface without affecting the recovery process. This means that service water tanks can also be used independently of the

-c whether this fine filter is in operation, service water for the high pressure pump can be drawn off.

^According to a further feature of the invention, the in the mud compartment in front of the mouth of the leading to the front compartment

ASSM-04gDE March 13, 1989

The coarse screen in the pipe is not extended down to the floor, but is attached to an intermediate floor. This largely prevents the coarse screen from becoming clogged, as sludge and other larger contaminants The sieve surface of this coarse sieve therefore remains practically fully effective. This only changes when the sludge and dirt that has settled in the bottom of this sludge water compartment is so large in volume that that it is higher than the intermediate floor. Before this happens, however, the water in the sludge water compartment has risen so high that the vehicle is fully loaded and can no longer continue to work.

According to a further feature of the invention, the piston-like design of the common partition wall, known from the prior art, is present between the sludge water compartment and the intermediate compartment. The arrangement of the piston here between these two compartments has no effect on the available usable volume in the service water tanks. If a high percentage of sludge is sucked in through the sludge hose, the sludge water compartment can be chosen to be relatively large and the intermediate compartment to be small, *>without affecting the recycling process. would be impaired; the fully available quantity of service water is still available from the service water tanks. Conversely, if the percentage of solid dirt is relatively low, the sludge water compartment can be made correspondingly small and the intermediate compartment correspondingly large. This also has no influence on the amount of water that accumulates in the domestic water tanks and is available there.

To ensure that the water to be drained from the sludge water compartment or from the intermediate compartment is as sludge-free as possible the corresponding line openings are attached to mechanical swing indicators in these compartments. The openings are therefore preferably located well above

ASSM-CHgDE
March 13, 1989

of the corresponding compartment floor.

Further advantages and embodiments of the invention can be found in the features further listed in the claims and in the following exemplary embodiment.

SHORT DESCRIPTION OF THE DRAWING

The invention is described and explained in more detail below using ^the embodiment shown in the drawing. They show:

Fig. 1 is a rheomatic longitudinal section through the various water compartments of an anal cleaning vehicle according to the invention with a schematic diagram

,division of the various line connections between the compartments and

Fig. 2 is a schematic representation of the sieve drum filter in the anterior chamber.

WAYS OF IMPLEMENTING THE INVENTION

A tank container 10 is attached to a sewer cleaning vehicle (not shown in detail). This tank container 10 has a circular-cylindrical shape in cross-section. Its rear end in relation to the vehicle is designed in the form of a rear plate 12, which can be folded upwards by means of a hinge arrangement located at the top and thus folded away from the tank container 10.

The tailgate 12 is the rear end limit of the sludge water compartment 14, which is limited on its opposite end facing away from the driver's cab by a front wall 16. This front wall 16 is part of a piston arrangement 18, which closes the cross-section of the tank container 10 at this point. The sludge water compartment 14 is separated from a

ASSM-04gDE March 13, 1989

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separated by an intermediate compartment 22 separated by the piston arrangement 18.

In front of this intermediate compartment 22, there is a front compartment 24 inside the tank container 10. The front compartment 24 is delimited on its front side by the front side 26 of the tank container 10. The sludge water compartment 14, the intermediate compartment 22 and the front compartment 24 are thus located one behind the other in the tank container 10. 10

A suction hose 28 extends into the sludge water compartment 14 from above, through which sludge water can be sucked into the sludge water compartment 14 from outside. The suction is effected by the negative pressure generated in the sludge water compartment 14.

An intermediate floor 30 is attached to the tailgate 12 and is connected to the remaining wall of the tank container 10, which is located above the intermediate floor 30, via wall areas designed as a coarse sieve 31. The coarse sieve wall areas 31 can be folded upwards by means of a hinge 33.

In the tailgate 12, above the intermediate floor 30, a first line 32 leads from the outside into the mud water compartment 14, which is located within the sludge water compartment 14 i&eegr; a flexible hose piece 34. The outlet opening 36 of this flexible hose piece 34 at its free end is attached to a mechanical float 1 ge 38. This ensures that the outlet opening 36 is always located in the area of the water level 40 present in the sludge water compartment 14.

The line 32 leads to a low-pressure pump 42 located below the tank container 10 and from there to the front compartment 24 of the tank container 10. The line 32 flows into this front compartment 24 and ends there in the area of a second pre-filter, a sieve drum 44. The liquid at the sieve drum, supplied through the line 32,

ASSM-04gDE 13 March 1089

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The water 46 flows through the outer surface 47 of the screen drum 48 from the outside to the inside and from there through the outer surface to the outside, whereby the surface of the outer surface 47 becomes covered with dirt particles 50, which larger than 0.3 mm in diameter. When the screening drum 48 rotates, which is shown by the arrow 52, these dirt particles 50 are removed from the jacket surface 47 by a scraper 54. These dirt particles 50 fall into the floor area of the front compartment 24 and form

jQ there is a very less dense layer of dirty water 56.

One end of a suction line 58 extends into the dirty water layer 56. This suction line 58 leads from above back into the sludge water compartment 14.

In the front compartment there is a lower float switch 60 and an upper float switch 62. The lower float switch 60 controls a discharge valve installed in the suction line. shut-off valve 64, which it closes when the dirty water layer 56 reaches an extremely low water level. The upper float switch 62 switches off the low-pressure pump 42 in the first line 32 when the water level of the dirty water layer 56 reaches a maximum upper water level. level has been reached. This maximum upper water level is still below the sieve drum filter 44, so that the cleaning effect of this filter 44 cannot be impaired by the dirty water layer 56.

The water cleaned by the sieve drum filter 44 flows via a second line 66 in free flow through the partition wall 68 between the intermediate compartment and the front compartment into the intermediate compartment 22.

In the intermediate compartment 22, floating bodies 72 are arranged in a

There is a guide box (not shown) to protect against wall movements, to which the mouth opening of a flexible hose piece /4 is attached. This hose piece

ASSM-04gDE 13 March 1989

/C

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74 opens at one end into a third line 76, in which a second low-pressure pump 78 is installed and which leads to a fine filter 80. In this fine filter the fluid from the intermediate compartment 22 through the flexible The water sucked in through the hose is further cleaned down to a dirt particle size of 0.08 mm in diameter. The cleaned water exiting the filter is pumped further by this low-pressure pump 78 to separate service water tanks 82 arranged on the side next to the paint container 10.

10 led.

The dirt particles accumulating in the fine filter 80 are pumped back into this compartment 14 via a return line 84 which flows into the sludge water compartment 14 from above.

15

The fine filter 80 has an integrated pressure difference control, which, when there is a differential pressure between the filter inlet and the filter outlet, visually indicates the degree of contamination and initiates a cleaning process for this filter without interrupting the recovery process.

A line 88 leads from each of the two service water tanks 82 to a high-pressure pump (not shown in detail). This high-pressure pump supplies service water to a flushing hose that can be lowered into the channel to be cleaned.

A branch line 90 leads from this high-pressure pump back to the screen drum filter 44, so that the service water 92 in the service water tank 82 can also be used to clean the screen drum 48. This is done by means of nozzles 93 which rinse the screen drum 48 from the inside to the outside. 35

In order to avoid turbulence when water is sucked out of the service water tanks 82, a so-called swirl breaker is installed in the area of the inlet opening of the respective line 88.

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ASSM-04gDE ■'- I

13 March 1989 · ^: ·|· · ; ■'

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-10-available.

Pipes 98 and 100 lead from above into the two service water tanks 82 and the intermediate compartment 22, each of which because they can be connected to a drinking water supply source 102. There is a fine filter in the line 98 so that even when filling with fresh water, e.g. from a hydrant, no impurities can get into the tanks and from there to the high-pressure pump. Both in the Drinking water can therefore be filled into the service water tanks 82 and the intermediate compartment 22.

When cleaning with fresh water, for example, the intermediate chamber is completely filled with tap water at least once.

There are also valves at the front of the various lines so that the corresponding lines can be closed or opened depending on the respective operation of the sewer cleaning vehicle.

Claims (1)

ADDRESS 01) Sewer cleaning vehicle with - a sludge water compartment that can be closed by a tailgate that swings away from it, - a domestic water compartment1, - a first line connection consisting of several lines between the sludge water compartment and &aacgr;< w B smoke- IU water-repellentii, - a first filter within the sludge water compartment for coarsely sieving the sludge water present in this compartment, sucked in through a sludge hose from outside the fair, - a second filter in the form of a rotating sieve drum provided with AI strips i -\ the first line connection, - a high-pressure pump in another line leading away from the service water compartment, characterized by the fact that - an intermediate compartment (22) is provided between the sludge water compartment (14) and the service water compartment (82), - an additional intermediate compartment (24) is provided in terms of pipework between this intermediate compartment (22) and the sludge water compartment (14), wherein - a first line (32) between the sludge water compartment (14) and the front compartment (2^). - a second line (66) between the preliminary compartment (24) and the intermediate compartment (22), - a third line (76) exists between the intermediate compartment (22) and the service water compartment (82), - sludge water compartment (14), intermediate compartment (22) and front compartment (24) are arranged one behind the other in a common tank container (10), - the customs department1 is formed by two tanks (82) arranged on the sides of the tank container, - in the first (32) and third line (76), in terms of height A' jM-04gDE 13 March 1989 Il · · I -Z- Below the tank container (10), there is a low-pressure pump (42, 78), - the second filter (44) is arranged in the front compartment (24), above its bottom, whereby -- the first line (32) opens above the outer surface (47) of the sieve drum (48) of this filter (44), -- the second line (66) leads from this second filter (44) into the intermediate compartment (22), -- a suction line ( ^&Ggr;&igr; 8) from the lower inner area (5 0) of the front compartment (?4), from below the second filter (44), back into the sludge water compartment (14) and there flows into it from above. 02) Vehicle according to claim 1, characterized in that in the front compartment (24) an upper float switch (62) is mounted in such a way that at a maximum water level corresponding to this float switch (62) within the front compartment (24) which is still below the second filter (44) the first pump (42) is switched on and the suction line (58) is opened, 3) Vehicle according to claim 2, characterized in that in the front compartment (24) a lower float switch (60) is mounted in such a way that at a minimum water level corresponding to this float switch (60) within the front compartment (24) the suction line (58) leading to the sludge water compartment (14) which is still submerged at this water level can be closed (64). 04) Vehicle according to claim 1, characterized in that a further filter (80) is present in the third line (76), this filter (80) being additionally connected to a return line (84) opening into the upper region of the sludge water compartment (14), through which the dirt accumulating in this filter (80) is returned to the sludge ASSM-OIgDE March 13, 19P9 &bull; «ti &igr; · · · - 3 -water compartment (14) recyclable i ?, t. 05) Vehicle according to claim 1, characterized in that - this filter (80) has an integrated pressure difference control which initiates a cleaning process when there is a differential pressure between the filter inlet and filter outlet, - the dirt particles are removed from the filter by the differential pressure between the return line (8°C) and the filter clean side. &bull;&lgr; w» -&idiagr; ^ ^ «· .. &igr;.· &eegr;&igr;&lgr; ^a &eegr; ttw\ *l rl t t n* *· \r\ r* &Lgr; &eegr; &eegr; r &iacgr; /· I. -I »· &Lgr; k &Lgr;&Pgr; ^ &Lgr; &igr;« &eegr;&eegr;&Lgr; 1 »&Igr;&Lgr;&iacgr;» LJ ws I - .. ^ \J II J &Lgr; C '' TTCf UCH UIIU UU » VH &ngr;, ItIl; .&igr;&igr;&ngr;.&Ggr;! U &igr; t &Kgr;«. HUL &igr; TOtI «_ I HC IM l'j^'· motor-driven suction nozzle of the return line (84) which opens into the upper area of the sludge water tank, - this return process is supported by the vacuum in the suds water tank, - this return process is fully automatic and the recovery process is not interrupted because only a small part in terms of volume returns to the sludge container via the return line. 06) Vehicle according to claim 1, characterized in that _ in Cs*k*lammijjar-rAv*3R4' ei 1 / 1 &Lgr; \ ta &Pgr;&ugr;&ogr; the &ogr;&ogr;-&id;&eegr; 7ui he honKniiin &tgr;&igr;&kgr; t^\i H &igr; uiiiinn uj Ju &igr; u &ugr;&ngr;\.&igr; · &tgr; ± ~&tgr; / »* &tgr;_ · itt\« ' j t- &lgr;- »ti &kgr;.&tgr;&tgr; t ^v uv n wvu ^n (30) with upwardly adjoining side walls (31) partially designed as a sieve, - the outlet opening (36) of the first line (32) is located above this intermediate floor (30). - the wall area designed as a sieve can be folded up by means of a hinge (33). 07) Vehicle according to claim 1, characterized in that the common partition wall present between the sludge water compartment (14) and the intermediate compartment (22) is designed as a piston (18) which can be displaced through the tank container (10), so that an enlargement of the sludge water compartment (14) by displacing this piston (18) corresponds to a corresponding reduction in the size of the intermediate compartment (22). ASSM-OIgDE
March 13, 1989 -4 - 08) Vehicle according to claim 7, characterized in that that when the tailgate (12) is swung away, the piston (18) can be guided completely through the mud water compartment (14), so that the mud present in this compartment can be pushed out by the piston (18) when the tailgate (12) is swung away. &eegr;&Pgr;&udigr;&idiagr; narh Äncnriir h 1 15 20 characterized in that a line (98, 100) for connection to a fresh water supply (102) projects from the top of each of the two tanks (82) and the intermediate compartment (ZZ) . 10) F ahf L -j &igr; .cj to A &eegr; s &rgr; ruch 1 , characterized in that the mouth opening (36) of the first line (32) extending into the sludge water compartment (14) and the mouth opening of the third line (74, 76) opening into the intermediate compartment are each attached to mechanical float indicators (38, 72). 11) Vehicle according to claim 1 or 9, characterized in that in the intermediate compartment (22) there is a mechanical float indicator (69) by means of which the pump (78) in the third line (76) can be switched off when the water level is extremely low and the pump (42) in the first line (32) can be switched on when the water level is extremely high. 12) Vehicle according to claim 1, ■iacharacterized in that in the tanks (82) there is a mechanical sh*i .ner indicator (99) by which the third line (76) can be closed when the water level is extremely high. ASSM-04gDE
March 13, 1989 -5- 13) Vehicle according to claim 1, characterized in that the tanks (82) are connected by pipes.