EP4001516A1 - System zum ausheben von gräben und zum verlegen von langgestreckten gegenständen, insbesondere von rohren oder kabeln, mit behandlung von aushöhlungen - Google Patents

System zum ausheben von gräben und zum verlegen von langgestreckten gegenständen, insbesondere von rohren oder kabeln, mit behandlung von aushöhlungen Download PDF

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Publication number
EP4001516A1
EP4001516A1 EP21205346.6A EP21205346A EP4001516A1 EP 4001516 A1 EP4001516 A1 EP 4001516A1 EP 21205346 A EP21205346 A EP 21205346A EP 4001516 A1 EP4001516 A1 EP 4001516A1
Authority
EP
European Patent Office
Prior art keywords
chamber
heel
casing
storage
trench
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.)
Pending
Application number
EP21205346.6A
Other languages
English (en)
French (fr)
Inventor
Philippe TODESCO
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.)
OT Engineering SAS
Original Assignee
OT Engineering SAS
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
Priority claimed from FR2012059A external-priority patent/FR3116548B1/fr
Application filed by OT Engineering SAS filed Critical OT Engineering SAS
Publication of EP4001516A1 publication Critical patent/EP4001516A1/de
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E02F5/08—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with digging wheels turning round an axis
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E02F5/10—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with arrangements for reinforcing trenches or ditches; with arrangements for making or assembling conduits or for laying conduits or cables
    • E02F5/101—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with arrangements for reinforcing trenches or ditches; with arrangements for making or assembling conduits or for laying conduits or cables forming during digging, e.g. underground canalisations or conduits, by bending or twisting a strip of pliable material; by extrusion
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E02F5/12—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with equipment for back-filling trenches or ditches

Definitions

  • the present invention relates to the field of systems for digging trenches in the ground for laying elongated objects, in particular optical cables, electric cables, or tubes intended to receive this type of cable, or even conduits.
  • the rotation of the trenching wheel of the digging system and the advance of the carrier truck allows the obtaining in the ground of a trench at the desired depth.
  • the carrier truck is also equipped with a device for suction and collection of the cuttings which are generated during the digging of the trench.
  • the latter After laying the cables or tubes inside the trench, the latter is filled with a ready-to-use cement-based mortar which is manufactured in a specialized factory and which is transported to the site using another machine of the truck-mixer type.
  • the present invention aims to remedy these drawbacks.
  • the invention relates to a system for digging at least one trench in the ground, for depositing at least one elongated object, in particular a tube or a cable, and for filling in the dug trench.
  • the system includes a trencher wheel and a housing partially enclosing the trencher wheel. A part of the slicing wheel projects out of the casing and the other part of the wheel is located inside an internal housing of said casing.
  • the system further comprises a heel integral with the casing and arranged at least partly at the rear of the slicing wheel.
  • heel is meant a rear part of the system.
  • heel secured to the casing is meant that the heel is fixed relative to the casing.
  • the heel and the housing can be formed as separate pieces to facilitate manufacturing. Alternatively, the heel could be made in one piece with the casing.
  • the heel internally delimits at least one cuttings collection chamber in communication with the internal housing of said casing and having at least one outlet opening.
  • the heel comprises means for guiding said elongated object to be deposited provided with an inlet opening and an outlet opening for the passage of said elongated object which is offset vertically downwards with respect to the outlet opening of the collection chamber.
  • the system also comprises at least one binder distribution means provided with a hopper integral with the casing and/or the heel and delimiting a chamber for storing and metering said binder in communication with the internal housing of the casing and /or with the heel collection chamber.
  • the binder distribution means is also provided with at least one worm screw mounted inside the storage and metering chamber, and means for driving said worm screw in rotation.
  • the storage and metering chamber has a passage cross-section which decreases at least over part of its length.
  • the section transverse passage is decreasing vertically downwards, ie on the side of the casing and/or the heel.
  • a system which makes it possible to simultaneously carry out the operation of digging the trench, the operation of depositing the elongated object(s) inside the dug trench, and the operation of covering of this or these elongated objects deposited and of filling in the dug trench with the cuttings produced during the digging operation.
  • the cuttings generated during the digging of the trench rise inside the casing before being sent to the heel collection chamber, then reintroduced into the trench which has just been dug for the removal of the object(s). elongated.
  • the cuttings generated during digging are drawn inside the internal housing of the housing and the collection chamber of the heel by rotation of the trenching wheel.
  • the cuttings are mixed with the binder before being reintroduced into the trench, which makes it possible to plug it and obtain a backfill material with good bearing and resistance characteristics after a subsequent compacting operation.
  • the system of the invention thus makes it possible to reduce the costs of laying optical, electrical, telephone cables, etc., and is more ecological.
  • the arrangement of the endless screw or screws inside the chamber of the hopper having at least one part having a passage cross-section which is decreasing makes it possible to avoid having agglutination and compression of the binder before its introduction into the internal housing of said casing and/or into the collection chamber of the heel. This promotes even binder distribution.
  • the hopper of said dispensing means is provided with at least one storage and metering portion delimiting at least in part the storage chamber and metering and having a passage cross-section which decreases at least over part of its length.
  • the hopper of said dispensing means can also be further provided with a fixing base secured to the casing, and/or to the heel, and on which the storage and metering portion is fixed.
  • the storage and metering chamber is delimited by the storage and metering portion and by the fixing base.
  • said endless screw extends inside the fixing base and the storage and metering portion.
  • the passage section of the fixing base is preferably constant. Alternatively, it could be possible to provide a fixing base cross-section of passage which is decreasing.
  • the fixing base and the storage and metering portion of the hopper of said dispensing means can be made in one piece.
  • the hopper could include only the storage and metering portion of the hopper.
  • the ratio between the volume of said endless screw and the internal volume of the storage and metering chamber of said dispensing means is between 3% and 50%.
  • volume of said endless screw is meant the physical volume of said endless screw, which corresponds to the volume of the body of the screw to which is added the volume of the helix(es) which wind around the body.
  • the ratio between the volume of said endless screw of the distribution means and the internal volume of the storage and metering chamber is between 3% and 9%.
  • the dispensing means comprises two augers mounted within the metering chamber of the hopper.
  • the ratio between the volume of the two endless screws and the internal volume of the storage and metering chamber can advantageously be between 7% and 9%, and preferably equal to 8%.
  • the dispensing means comprises a single endless screw.
  • the ratio between the volume of said single endless screw and the internal volume of the storage and metering chamber can advantageously be between 3% and 5%, and preferably equal to 4%.
  • the distribution means may comprise at least three endless screws.
  • the hopper of said distribution means can be in communication with the internal housing of the system casing and thus distributes the binder inside this housing.
  • the hopper of said distribution means can be in communication with the heel collection chamber and thus distributes the binder inside this chamber.
  • the hopper can be secured to the housing. Alternatively or in combination, the hopper can be secured to the heel.
  • the hopper of said dispensing means comprises at least one filling opening which is provided on an upper face of the hopper.
  • This arrangement of the filling opening(s) makes it possible to limit the risk of jamming inside the binder supply conduit provided to come into engagement inside the filling opening.
  • the endless screw or screws of said distribution means are preferably mounted vertically inside the storage and metering chamber.
  • the axis of rotation of the or each endless screw may for example form an angle with a vertical axis less than or equal to 45°.
  • the heel internally delimits the collection chamber and a guide chamber of said elongated object to be deposited forming at least in part said guide means and provided with inlet and outlet openings.
  • a guide chamber of said elongated object to be deposited forming at least in part said guide means and provided with inlet and outlet openings.
  • the heel collection chamber forms an upper chamber thereof and the guide chamber forms a lower chamber of said heel.
  • the entrance opening of the guide chamber of the bead opens laterally. This promotes reduced transverse bulk for the heel.
  • the bead may internally comprise a compartmentalization wall which separates the upper collection and lower guide chambers, and which is inclined obliquely downwards and towards the rear.
  • the casing can also be equipped internally with a ramp obliquely extending the partitioning wall of the heel and extending inside the internal housing of said casing.
  • the heel internally delimits an upper chamber for collecting cuttings, and a lower chamber for guiding said elongated object to be deposited, the inlet opening of the guiding chamber of the heel emerging laterally.
  • the outlet opening of the bead guide chamber is located vertically below and plumb with the outlet opening of the collection chamber.
  • the heel may further comprise at least one sheath for guiding said elongated object to be deposited which extends inside the guide chamber in the direction of the outlet opening of said chamber. This facilitates the passage and sliding of said elongated object to be deposited during operation of the system.
  • the guide sleeve may extend projecting through the inlet opening.
  • the heel compartmentalization wall can then be equipped with means for blocking said guide sleeve.
  • the casing can be equipped with a sole intended to bear against the surface of the ground.
  • the heel can also be equipped with a sole offset vertically downwards with respect to the sole of the casing and intended to bear against the bottom of the dug trench. This helps guide the system as it advances.
  • the heel guide chamber is advantageously offset at least partly vertically downwards with respect to the sole of the casing.
  • the heel is advantageously arranged at least partly at the rear of the casing.
  • the heel can be fitted with an access hatch to the cuttings collection chamber.
  • the system can also be additionally equipped with at least one water injector capable of injecting water into the collection chamber of the heel and/or into the internal housing of the casing.
  • the invention also relates to a method for digging at least one trench in the ground, for depositing at least one elongated object and for filling in the dug trench using the system as defined above.
  • At least the second, third and fourth steps are carried out simultaneously.
  • the fourth step of covering said elongated object and filling in the dug trench is carried out with the cuttings generated during the second digging step and with the binder which are driven by the rotation of the trenching wheel.
  • the method also comprises a step of injecting water which is mixed with the cuttings generated during the first digging stage and driven by the rotation of the trenching wheel.
  • the first, second, third and fourth steps are carried out simultaneously.
  • a system is shown, referenced 10 as a whole, which is suitable for digging a trench in the ground, for depositing elongated objects in the dug trench and for the internal treatment of the cuttings generated.
  • the elongated objects are tubes 11.
  • the system 10 is intended to be hooked to the rear of a motorized machine to allow its advancement, for example a carrier truck.
  • the system 10 comprises a slicing wheel 12, a casing 14 partially enveloping the slicing wheel, and a heel 16 integral with the casing 14 and arranged longitudinally at the rear of the slicing wheel 12.
  • the system 10 also includes a distribution means 100 for supplying binder to the housing 14.
  • the slicing wheel 12 is provided at its periphery with cutting members 18, here made in the form of added teeth.
  • cutting members 18 here made in the form of added teeth.
  • any other type of trenching wheel such as cutting and sawing discs could be used.
  • the trenching wheel 12 is intended to make narrow trenches, for example of the order of 10 to 20 cm, and of shallow depth, for example less than 50 cm, in particular for laying tubes such as optical, electrical, telephone cables, etc.
  • the slicing wheel 12 is rotatable about a transverse axis 12a.
  • the system 10 is equipped with a drive member 20 in rotation, such as a geared motor, extending in the hub of the slicing wheel 12.
  • the protective casing 14 envelops an upper part 12a ( figure 5 ) of the trenching wheel.
  • the casing 14 internally delimits a housing 22 inside which is located the upper part 12a of the slicing wheel.
  • a lower part 12b of the trenching wheel projects downwardly from the housing 14. In operation, the upper part 12a of the trenching wheel is located outside the dug trench and the lower part 12b is located in the trench.
  • the housing 14 has a vertical section of general inverted U shape inside which is located the upper part 12a of the slicing wheel.
  • the casing 14 is equipped, in the lower part, with a peripheral flange 24 intended to bear against the surface of the ground as shown on the figure 6 .
  • the sole 24 extends transversely.
  • the casing 14 is delimited in the vertical direction by the sole 24.
  • the housing 14 comprises two side flanges 26, 28 spaced apart transversely, and a central flange 30 to which the flanges are fixed on either side.
  • the sole 24 is fixed on the flanges 26, 28.
  • the flanges 26, 28 and the flange 30 jointly delimit the internal housing 22 of the casing.
  • the flange 30 has a half-crown shape.
  • the flanges 26, 28 delimit the housing 22 in the transverse direction.
  • the flange 30 delimits the housing 22 in the vertical direction.
  • the housing 22 is open vertically downwards to allow passage of the slicing wheel 12.
  • the housing 22 is also open towards the rear on the side of the heel 16.
  • the casing 14 also comprises, in the rear part, a plate 32 ( figure 5 ) defining a through opening 34 to allow communication between the internal housing 22 of the housing and the heel 16.
  • the opening 34 passes through the thickness of the plate 32 in the longitudinal direction.
  • Plate 32 is fixed to flanges 26, 28 and flange 30.
  • the system 10 further comprises a lug 36 fixed to the casing 14 to allow attachment to the associated motorized vehicle and its manipulation.
  • the system 10 can thus be manipulated to adjust in particular the depth of the trench to be dug or to pass into a raised position relative to the ground.
  • the lug 36 is fixed to one of the side flanges 26, 28 of the casing.
  • the lug 36 also supports the drive member 20 of the slicing wheel.
  • the heel 16 is arranged partly at the rear of the casing 14.
  • the heel 16 is fixed to the casing 14.
  • the heel 16 internally delimits a first upper chamber 40 and a second lower chamber 42 which are separate from each other.
  • the upper 40 and lower 42 chambers are separated from each other. In other words, there is no communication from one room 40, 42 to another.
  • the chambers 40, 42 are located vertically one below the other.
  • the upper chamber 40 is intended to receive and evacuate the cuttings generated during the digging of the trench.
  • the lower chamber 42 is for its part intended to receive the tubes 11 to be laid at the bottom of this trench.
  • the tubes 11 are shown only partially, as regards their length, for reasons of clarity.
  • the upper chamber 40 is in communication with the internal housing 22 of the housing.
  • the upper chamber 40 is in communication with the through opening 34 of the plate.
  • the upper chamber 40 has a through inlet opening 44 which faces this through opening 34.
  • the upper chamber 40 is in communication with the internal housing 22 of the housing via the inlet opening 44 located longitudinally on the side of the trenching wheel 12.
  • the upper chamber 40 also has a through-out outlet opening 46 which is located longitudinally opposite the slicing wheel 12 and the inlet opening 44.
  • the outlet opening 46 is located at the rear of the heel 16 The outlet opening 46 faces the opposite side of the trencher wheel 12, i.e. facing rearward.
  • the lower chamber 42 has a side entrance opening 48 ( figure 1 and 3 ) leading outwards.
  • the entrance opening 48 is through.
  • Inlet opening 48 extends transversely through the thickness of heel 16.
  • the lower chamber 42 also has an exit opening 50 which is located longitudinally opposite the slicing wheel 12.
  • the exit opening 50 is located at the rear of the heel 16.
  • the exit opening 50 is oriented on the opposite side of the trenching wheel 12, i.e. oriented towards the rear.
  • the outlet opening 50 is located vertically below and plumb with the outlet opening 46.
  • the heel 16 is internally equipped with a partitioning wall 52 separating inside thereof the upper 40 and lower 42 chambers.
  • the compartmentalization wall 52 also separates the outlet openings 46, 50.
  • the compartmentalization wall 52 is inclined obliquely downwards and the back.
  • the partitioning wall 52 is rectilinear.
  • the compartmentalization wall 52 extends from the front to the rear of the heel 16.
  • the compartmentalization wall 52 extends obliquely from the entrance opening 44.
  • the heel 16 comprises two side flanges 56, 58 spaced apart transversely, and a central flange 60 to which the flanges are fixed on either side.
  • the casing 14 is equipped, in the lower part, with a sole 62 intended to come opposite the bottom of the trench as shown in the figure 6 .
  • the heel 16 also comprises, in the front part, a front plate 64 delimiting the through inlet opening 44 of the upper chamber 40.
  • the opening 44 passes through the thickness of the plate 64 in the longitudinal direction.
  • the inlet opening 44 faces the through-opening 34 of the casing to obtain communication between the upper chamber 40 and the internal housing 22 of the casing.
  • the plate 64 is fixed on the flanges 56, 58 and the flange 60 of the heel.
  • the plate 64 is also fixed to the plate 32 of the housing.
  • the flanges 56, 58 as well as the flange 60 and the wall 52 for compartmentalizing the heel jointly delimit the upper chamber 40 of the heel.
  • the flanges 56, 58 delimit the chamber 40 in the transverse direction.
  • the flange 60 and the partitioning wall 52 delimit the chamber 40 in the vertical direction.
  • the plate 64 delimits in the longitudinal direction the chamber 40 on the front side. Chamber 40 is open to the rear through outlet opening 46. Chamber 40 is open to the front through inlet opening 44.
  • Heel 16 is equipped with a hatch 65 for access to the chamber 40 which is removably mounted on the flange 60.
  • the flanges 56, 58 as well as the sole 62 and the partitioning wall 52 jointly delimit the lower chamber 42.
  • the flanges 56, 58 delimit the chamber 42 in the transverse direction.
  • the sole 62 and the partitioning wall 52 delimit the chamber 42 in the vertical direction.
  • Chamber 42 is open at the rear via outlet opening 50. Chamber 42 is closed at the front.
  • the heel 16 also comprises, in the front part, a curved wall 66 delimiting in the longitudinal direction the chamber 42 on the front side.
  • the wall 66 is fixed on the flanges 56, 58 and the sole 62 of the heel.
  • the wall 66 is also fixed to the plate 64.
  • the curved wall 66 is located in the vicinity of the slicing wheel 12. The radius of curvature of the wall 66 is adapted to that of the slicing wheel 12.
  • the casing 14 also comprises a ramp 68 extending obliquely upwards the wall 52 for compartmentalizing the heel and extending inside the internal housing 22 of said casing.
  • the ramp 68 extends above the trenching wheel 12.
  • the ramp 68 is provided to facilitate the passage of the cuttings from the internal housing 22 of the housing to the upper chamber 40 of the heel during the rotation of the trenching wheel 12.
  • only the upper chamber 40 is in communication with the internal housing 22 of the housing.
  • the lower chamber 42 of the heel does not communicate with the housing 22.
  • the system 10 further comprises sheaths 70 for guiding the tubes 11 to be deposited in the trench which extend inside the lower chamber 42 of the heel.
  • the sheaths 70 here extend projecting outwards through the inlet opening 48 of the heel 16.
  • the inlet opening 48 is made in the thickness of the flange 56 of the heel.
  • Each sheath is intended to receive one of the tubes 11 to be placed in the dug trench.
  • the sheaths 70 extend in the direction of the outlet opening 50 of the lower chamber of the heel. In the illustrated embodiment, the sheaths 70 are set back from the outlet opening 50. Alternatively, the sheaths could be flush with the outlet opening 50, or extend projecting outwardly relative to this one. In the illustrated embodiment, the lower end 52a of the compartmentalization wall 52 is folded downwards so as to guide the tubes 11. The lower end 52a of the compartmentalization wall delimits the outlet opening 50.
  • the partitioning wall 52 is equipped with a lug 72 bearing against them.
  • the sheaths 70 are three in number. As a variant, it is possible to provide a lower or higher number of sheaths.
  • the system 10 also comprises a distribution means 100 for supplying binder to the casing 14.
  • the distribution means 100 comprises a hopper 102 fixed to the casing 14.
  • the hopper 102 is fixed to the upper part of the casing 14. In the illustrated embodiment, the hopper 102 is fixed to the flange 30 of the housing.
  • the hopper 102 internally delimits a chamber 104 for storing and metering the binder.
  • This chamber 104 is in fluid communication with the internal housing of the casing via a through opening (not visible) formed in the thickness of the flange of the casing.
  • the hopper 102 allows the supply or distribution of the binder in the internal housing of the housing.
  • the binder can for example be a hydraulic binder.
  • hydraulic binder is meant a binder which, mixed with water, forms a paste which sets and hardens.
  • the binder can for example be cement or even lime.
  • a dye can also be introduced inside chamber 104 of the hopper.
  • the distribution means 100 also comprises two endless screws 106 arranged inside the hopper 102 being oriented vertically. Worms 106 extend inside chamber 104. The axes of rotation of worms 106 are vertical and parallel. The endless screws 106 are arranged relative to each other inside the chamber 104 so that the helix of one of the screws engages in part in the helical space left free by the helix of the other screw.
  • the distribution means 100 also comprises means for driving the worm screws 106 in rotation.
  • the means for driving the worm screws 106 in rotation comprise a chain 108 engaged with two toothed wheels each fixed to the upper end of the associated endless screw, and a drive motor 110 connected to the chain 110 and supported by the hopper 102.
  • the chain 108 could be replaced by a belt.
  • the motor 110 can for example be an electric motor.
  • the hopper 102 comprises a storage and metering portion 112, and a base 114 on which the portion 112 is fixed and making it possible to secure the hopper to the casing 14.
  • the storage and metering portion 112 has a passage cross-section for the binder which decreases when considered in the vertical direction.
  • the passage cross-section of the inlet of the storage and metering portion 112 is therefore greater than the section passage cross section of the outlet of this portion 112.
  • the passage cross section of the storage and metering portion 112 decreases regularly along its length.
  • the storage and metering portion 112 has a funnel shape.
  • the peripheral faces of the storage and metering portion 112 are inclined with the exception of one of the faces which extends purely vertically.
  • the storage and metering portion 112 has the shape of a truncated cone. As a variant, it is possible to provide other shapes, for example frustoconical of revolution or frustoconical with all faces inclined.
  • the storage and metering portion 112 has a decreasing cross-sectional area over its entire length.
  • the storage and metering portion 112 comprises a first part of decreasing passage cross-section, and a second successive part of constant passage cross-section. In this case, the storage and metering portion 112 has a decreasing passage cross-section over part of its length.
  • the storage and metering portion 112 and the base 114 are two separate parts assembled together.
  • the hopper 102 could be made in one piece.
  • the base 114 has a constant passage cross-section.
  • the passage cross-section of the base 114 is here equal to the passage cross-section of the outlet of the portion 112 for storage and metering.
  • the chamber 104 is delimited by the storage and metering portion 112 and by the base 114.
  • the internal volume of the chamber 104 is equal to the sum of the internal volume of the storage and metering portion 112 and the internal volume of the base 114.
  • the chamber 104 has a passage cross-section which decreases over part of its length.
  • Each endless screw 106 extends inside the storage and metering portion 112 and the base 114.
  • the helix of each endless screw 106 is entirely housed inside the chamber 104.
  • the 'helix of each endless screw 106 is therefore entirely housed inside the storage and metering portion 112 and the base 114.
  • each endless screw 106 is fixed axially on a lower face 114a of the base of the hopper and rotatable relative to this base around its axis of rotation by means of a bearing (not reference).
  • the upper end of each endless screw 106 is fixed axially on an upper face 112a of the storage and metering portion of the hopper and rotatable relative to this portion around its axis of rotation by means of a bearing (not referenced).
  • the upper face 112a and the lower face 114a of the storage and metering portion respectively form the upper face and the lower face of the hopper.
  • the sprockets of the endless screws 106 engaged with the chain 108 are located above the upper face 112a of the hopper.
  • the motor 110 is fixed on the upper face 112a by being located below this upper face and located outside the chamber 104.
  • the distribution means 100 further comprises a fairing 116 fixed to the underside 114a of the base of the hopper and inside which are housed the toothed wheels of the endless screws 106 and the chain 108.
  • Hopper 102 includes a filling opening 118 which opens into chamber 104. Opening 118 makes it possible to fill chamber 104. inside the opening 118.
  • the opening 118 is provided on the upper face 112a of the hopper. The opening 118 passes through the thickness of the upper face 112a of the hopper.
  • the ratio between the volume of the endless screws 106 and the internal volume of the chamber 104 is between 3% and 50%.
  • this ratio is between 3% and 9%, and preferably between 7% and 9%, and even more preferably equal to 8%.
  • the distribution means 100 further comprises vibrating means 120 fixed to the hopper 102 so as to promote the fluidization of the binder inside the latter.
  • the distribution means 100 also comprises two sensors (not shown) fixed to the hopper 102 and capable of detecting a high level and a low level of binder inside the latter.
  • the sensor of high level can for example be arranged near the upper face 112a of the hopper.
  • the low level sensor can for example be arranged in the vicinity of the lowest vibrating means 120.
  • the distribution means 100 can be equipped with a single sensor capable of detecting the level of binder inside the hopper 102, for example a sensor of the proportional type.
  • the system 10 further comprises water injectors 122 capable of injecting water into the upper chamber 40 of the heel.
  • the water injectors 122 are mounted on the heel 16, here on the flanges 56 and 58.
  • the water injectors 122 are equipped with nozzles opening inside the upper chamber 40 of the heel.
  • the system 10 is attached to the rear of a motorized carrier (not shown) via the bracket 36.
  • the cables or tubes 11 which are to be deposited at the inside a trench to be digged are carried by the motorized machine using reel carriers.
  • Each tube 11 is introduced inside one of the sheaths 70 of the system.
  • the system hopper 102 is also filled with binder.
  • the hopper 102 is supplied with binder through the filling opening 118 ( figure 8 ) of the hopper by means of a tank arranged on the motorized carrier, and of the supply conduit connecting the hopper to the tank.
  • Room 104 ( figure 8 ) of the hopper 102 allows the storage and metering of the binder.
  • the supply of binder to the hopper 102 need not be continuous.
  • the work phase and in particular the digging, can begin.
  • These operations can be controlled by radio control by an operator using a control unit controlling the operation of the slicing wheel 12 of the system.
  • the advance of the motorized carrier machine is adapted to the realization of the trench.
  • the trench T is executed with the trenching wheel 12 of the system which is positioned with its axis 12a of rotation oriented horizontally as shown in the figure 6 .
  • the speed of rotation of the slicing wheel 12 can for example be between 50 and 150 rpm.
  • the cutting elements 18 dig the trench T gradually.
  • the sole 24 of the casing bears against the ground S and the sole 62 of the heel is facing the bottom of the trench T.
  • the tubes 11 are deposited along the trench T at the bottom thereof, being guided beforehand inside the sheaths 70 which themselves extend into the lower chamber 42 of the heel.
  • the cuttings produced by the digging of the trench T are driven by the trenching wheel 12 inside the internal housing 22 of the casing.
  • the rotation of the endless screws 106 ( figure 8 ) of the distribution means 100 inside the metering chamber filled with binder allows the distribution of the binder inside the housing 22.
  • the rotation of the endless screws 106 makes it possible to grind any agglomerates of binder and to direct the binder to the housing 22 of the housing inside which the binder is mixed with the cuttings generated which are entrained by the trenching wheel 12
  • the cuttings mixed with the binder are driven by the slicing wheel 12 inside the housing 22 of the casing and go up along the latter until they reach the upper chamber 40 of the heel.
  • the cuttings mixed with the binder DL then slide along the compartmentalization wall 52 of the heel before being evacuated through the outlet opening 46.
  • the cuttings mixed with the binder D-L cover the tubes 11 deposited at the bottom of the trench T and completely fill the trench. All of the cuttings generated during the digging of the trench T are thus reintroduced into this trench at the rear of the trenching wheel 12 to fill it.
  • the addition of binder makes it possible to make the cuttings produced by the digging more resistant and harder before their reintroduction inside the trench T.
  • the quantity of binder to be added to the cuttings produced depends on the nature of the soil S to be dug.
  • the speed of rotation of the endless screws of the distribution means 100 driven by the motor is regulated according to the quantity of binder to be added.
  • the quantity of binder to be added to the cuttings produced can also be adapted according to the speed of advance of the trenching wheel 12.
  • the operation of the motor of the distribution means 100 can be controlled by the control unit also controlling the operation of the slicing wheel 12.
  • the information detected by the sensor(s) concerning the level of binder inside the hopper 12 are transmitted to the control unit to control the supply of binder to the hopper.
  • water can also be introduced inside the upper chamber 40 of the heel by the water injectors 122.
  • the operation of the water injectors 122 can be controlled by the control unit controlling the operation of the trenching wheel 12.
  • the hopper 102 and the water injectors 122 can respectively be supplied with binder and water from tanks transported by the motorized carrier.
  • the hopper 102 allows a distribution of binder inside the internal housing 22 of the housing.
  • the distribution means 100 of the system is equipped with two endless screws 106 mounted inside the chamber 104 for storage and metering.
  • a dispensing means 100 equipped with a single endless screw is between 3% and 50%.
  • this ratio is between 3% and 9%, and preferably between 3% and 5%, and even more preferably equal to 4%.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Soil Working Implements (AREA)
EP21205346.6A 2020-11-24 2021-10-28 System zum ausheben von gräben und zum verlegen von langgestreckten gegenständen, insbesondere von rohren oder kabeln, mit behandlung von aushöhlungen Pending EP4001516A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2012059A FR3116548B1 (fr) 2020-11-24 2020-11-24 Système de creusage de tranchées et de pose d’objets allongés, notamment de tubes ou de câbles, avec traitement des déblais
FR2105322A FR3116549B1 (fr) 2020-11-24 2021-05-21 Système de creusage de tranchées et de pose d’objets allongés, notamment de tubes ou de câbles, avec traitement des déblais

Publications (1)

Publication Number Publication Date
EP4001516A1 true EP4001516A1 (de) 2022-05-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21205346.6A Pending EP4001516A1 (de) 2020-11-24 2021-10-28 System zum ausheben von gräben und zum verlegen von langgestreckten gegenständen, insbesondere von rohren oder kabeln, mit behandlung von aushöhlungen

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EP (1) EP4001516A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3332249A (en) * 1965-01-22 1967-07-25 Challenge Cook Bros Inc Trench digging and refilling apparatus
US20050108903A1 (en) * 2003-11-24 2005-05-26 Power Line Constructors, Inc. Mechanized unit for protectively encasing a utility in a trench with processed excavated trench material
DE102014105577A1 (de) * 2014-04-17 2015-10-22 Novoter Ag Vorrichtung und Verfahren sowie Verlegeanlage zum Verlegen mindestens eines Stranges in einer Bodenfläche
EP3518361A1 (de) * 2011-01-26 2019-07-31 Husqvarna Ab Schichtmaschine und klingenanordnung dafür

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3332249A (en) * 1965-01-22 1967-07-25 Challenge Cook Bros Inc Trench digging and refilling apparatus
US20050108903A1 (en) * 2003-11-24 2005-05-26 Power Line Constructors, Inc. Mechanized unit for protectively encasing a utility in a trench with processed excavated trench material
EP3518361A1 (de) * 2011-01-26 2019-07-31 Husqvarna Ab Schichtmaschine und klingenanordnung dafür
DE102014105577A1 (de) * 2014-04-17 2015-10-22 Novoter Ag Vorrichtung und Verfahren sowie Verlegeanlage zum Verlegen mindestens eines Stranges in einer Bodenfläche

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