EP0819480A1 - Appareil de nettoyage pour oléoducs ou gazoducs - Google Patents

Appareil de nettoyage pour oléoducs ou gazoducs Download PDF

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Publication number
EP0819480A1
EP0819480A1 EP96810471A EP96810471A EP0819480A1 EP 0819480 A1 EP0819480 A1 EP 0819480A1 EP 96810471 A EP96810471 A EP 96810471A EP 96810471 A EP96810471 A EP 96810471A EP 0819480 A1 EP0819480 A1 EP 0819480A1
Authority
EP
European Patent Office
Prior art keywords
shield
cleaning device
pipe
pipe cleaning
braking
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.)
Withdrawn
Application number
EP96810471A
Other languages
German (de)
English (en)
Inventor
Christian Geppert
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.)
Transglobal Ltd
Original Assignee
Transglobal Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Transglobal Ltd filed Critical Transglobal Ltd
Priority to EP96810471A priority Critical patent/EP0819480A1/fr
Priority to EP97928390A priority patent/EP0918574B1/fr
Priority to DE59704470T priority patent/DE59704470D1/de
Priority to AU32704/97A priority patent/AU3270497A/en
Priority to CA002261110A priority patent/CA2261110C/fr
Priority to PCT/IB1997/000858 priority patent/WO1998003274A1/fr
Priority to US08/895,929 priority patent/US6070285A/en
Publication of EP0819480A1 publication Critical patent/EP0819480A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
    • B08B9/0553—Cylindrically shaped pigs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
    • B08B9/0551—Control mechanisms therefor

Definitions

  • the invention relates to a pipe cleaning device for Petroleum and gas pipelines, the deposits for example have in the form of paraffins, which device with a Liquid flow through the pipeline for cleaning purposes is pushed, the device has a sign, which one or more breakthroughs for one passing liquid stream forms to a intended flow resistance in the pipeline form, the shield attached to a braking device is coupled and on its front Can have cleaning device.
  • the facility consists of one Sealing body on which can be rotated in the direction of flow stored cleaning head with nozzles is attached to Solids such as wax from the inner tube wall to remove.
  • Solids such as wax from the inner tube wall to remove.
  • U.S. patent shows 4,920,600 a Pipe cleaning device from a cleaning head with itself radially, against the flow direction widening scrapers.
  • the cleaning head is axial firmly with a support body designed as a pipe plug connected, which has two sealing plates, the each made up of several mutually movable elements consist of pressure surges driven by the flow transferred to the cleaning head.
  • the object of the invention is a safe Pipe cleaning device for petroleum or gas pipelines too create.
  • This task is carried out with the characteristics of the independent claim 1 solved by the Braking device has at least one clamping element, that currently sticks to the pipe wall and is relative to Braking device moves to a with this movement to displace secondary fluid that has at least a throttle is braked and so Specifies the speed between the shield and the pipe wall.
  • This arrangement ensures that Pipe cleaning device not with raised Feed speeds at which a fixation of the Cleaning head can take place in the axial direction moving forward and that the feed motion is inevitable and autonomous. Doing so Braking energy by throttling to a secondary Liquid flow discharged from the pipe cleaning device heats up and through the device the heat at the passing Liquid flow and the environment passed on.
  • the braking force consists of three possible components together: From possible processing staff on Cleaning head in front of the sign, from the sum of the Sliding friction forces between pipe cleaning device and Pipeline against the feed direction and from at least one with a certain feed rate coupled partial braking force. While the Machining forces and the sliding friction forces with their Fluctuations represent disturbance variables, the same as the Partial braking force dependent on feed rate Fluctuations of the first two according to their Throttle characteristics from, in the pressure force and Feed rate are coupled. The lower the The more constant the disturbance variables are Feed rate. According to at least one throttle characteristics at times achieved in the secondary Liquid flow, can be a partial braking force approximate dependence on the square of the Feed speed can be generated. This disproportionate dependence means that with relative small changes in the feed rate large Differences in partial braking force are generated in order To compensate for disturbances.
  • a first option is to use clamping elements as moving rollers pressed radially against the pipe wall execute, which in turn with their rotation one Displacement of the secondary liquid in specified volumes and the resulting secondary liquid flow Brake chokes.
  • clamping elements as moving rollers pressed radially against the pipe wall execute, which in turn with their rotation one Displacement of the secondary liquid in specified volumes and the resulting secondary liquid flow Brake chokes.
  • a role like using a push crank on hydraulic brake cylinders Throttling points resp. Shock absorbers act, whereby by the Use of multiple roles and multiple Shock absorbers on a roller compensate for the fluctuating force / path characteristics of the individual Thrust crank takes place.
  • volumetric pump such as one Vane pump drives whose volume flow over Throttling points is braked.
  • a braking device with controlled feed rate is gradually two axially offset clamping elements use the radial forces in each Cross-section cancel each other and the stroke of the moment clamping element in the axial direction with a Piston, a secondary, throttled Fluid flow moves to limit while that second, currently not jamming element in a Starting position is moved when changing the Clamping the second element is secondary throttled liquid flow moves. It is useful when changing the clamp overlap the Provide clamping times so that no uncontrolled Sliding can occur. The process then looks like this that at the end of the braked stroke for the first Clamping element comes to a standstill, in which the Clamping the second clamping element in its Starting position is done.
  • the nozzles usually also have one with their jet forward directional component to the Keep the sign free of dirt.
  • a Distribution of the nozzles on concentric circles for Pipe axis can be uniform and of the angle of rotation independent cut in the deposits on the Pipe wall are generated. It is particularly advantageous if the sign near the pipe wall protrudes Wreath with a variety of nozzles for the detachment of Has residual deposits around the web for the shield cut freely.
  • the jet can also have an essential component in the circumferential direction, to be transverse to the feed direction and at an acute angle to the To cut the pipe wall. If the total of the moments Largely impulses from nozzles on shield and cleaning head picks up, the coupling part between the shield and Braking device less stressed on torsion.
  • flaps such as a "butterfly" valve can be provided, the Damper wing in the open position only when the flow reverses for example, along with the lifting of the Braking action to be released to a mechanical Block with certainty during the forward movement to exclude.
  • FIG. 1 With the figures are pipe cleaning devices for petroleum and Gas pipelines are shown holding a sign Cleaning device through a liquid flow in moving the pipeline forward.
  • the shield forms in the pipeline one or more breakthroughs for one passing liquid flow to a designated one Build up pressure and is on the back with a Provide braking device, the unwanted large This prevents feed speeds from at least one clamping element currently on the pipe wall sticks and moves relative to the braking device.
  • This movement is kinematic on a hydraulic one Displacer transferred to a secondary Liquid flow generated, which over at least one Throttle is braked and so the speed between the shield and the pipe wall.
  • FIG 1 is a shield 3 with a Cleaning device 5 shown, for example with Brake devices 8 according to Figures 2 to 7 coupled is what limit its feed rate.
  • a pipeline 1 drives a liquid flow 2 Shield 3 in front of it, the outer housing 50 over Packs 42 sealed against the pipeline 1 and is performed at the same time.
  • the packs 42 are through a retaining ring 51 secured.
  • a gear 56 acts in the inner housing 48 formed hydraulic motor 15 with cams 88 as Pressure booster via a pump system 15 with piston 58 and Check valves 61, 62 on the intake and Pressure lines 59, 60 of a hydraulic auxiliary system, for example for the maintenance of Clamping force used with radial clamping elements 9a, 9b can be.
  • An inlet 45 and an outlet 46 are in their cross section coordinated so that the Hydromotor 55 does not exceed at a given pressure difference turn a certain speed in the direction of rotation 57 can.
  • An actual cleaning device 5 is in the Shield 3 integrated on its front 4. Concentric to the tube axis 14 is on an arm of the outer housing 50 a baffle 39 attached, the Bores 52 has.
  • the baffle 39 has one outer diameter that is smaller than that Inside diameter of expected deposits is 6, and forms - since it protrudes at a distance from the shield 3 - A cavity 40 through the tube wall 1 and not removed deposits 6 is limited.
  • Nozzles 36, 37, 38 are provided which are connected via connecting channels 44, an annular channel 43 and pilot holes 49 with Rinsing liquid can be fed under pressure. A part of the nozzles splashes against the pipe wall 1 in order to Feed movement of the shield 3 lumps and chips of Cut away deposits 6.
  • the nozzles injects directly or indirectly into the cavity 40 to the detached lumps and chips to a size smash that can pass the baffle 39, and to advance the particles in front of the baffle 39 with the passing and displaced liquid flow 7 to be transported away.
  • the low offers Particle size good guarantee that no blockages enter.
  • the shield 3 is close the tube wall a ring 41 with nozzles 36, which remove any remaining deposits and the web for cut the packs free.
  • annular channel 53 is attached, which has a connection bore 54 with the space in front of the Baffle 39 is connected and that for pressure actuated Switching elements the reference pressure in front of the baffle 39 provides.
  • FIG. 2a The basic arrangement of the elements is shown in FIG. 2a can be seen, the internal piping 65, 66 with an adjustable throttle 21 for braking the secondary Liquid 10 is drawn out in Figure 2b, while Figure 2c shows a hydraulic circuit for the Clamping elements 9a, b shows.
  • the first clamping element 9a is clamped in the tube 1 with clamping jaws 11a and brakes over the intermediate braking devices 8a, 8b Shield 3.
  • the power flow for the braking force starts from Clamping element 9a via a coupling 77a on the piston rod 27a and piston 13a of the first braking device 8a, wherein secondary liquid 10 from the piston 13a via a Throttle point 21 is displaced and the piston 13b second braking device 8b and an associated one Piston rod 27b and clutch 77c a second Clamping element 9b moved in idle in the feed direction.
  • the actual braking movement is from the brake cylinder 12b and from there via tension elements 24 e.g. Wire ropes on the Transfer shield 3.
  • tension elements 24 e.g. Wire ropes on the Transfer shield 3.
  • tension elements 24 e.g. Wire ropes on the Transfer shield 3.
  • tension elements 24 e.g. Wire ropes on the Transfer shield 3.
  • tension elements 24 e.g. Wire ropes on the Transfer shield 3.
  • tension elements 24 e.g. Wire ropes on the Transfer shield 3.
  • tension elements 24 e.g. Wire ropes on the Transfer
  • each Guide fins 80 attached to the housing parts hold approximately in the middle of the pipe. Leakage losses from the secondary liquid 10 can by a traveling Pressure accumulator 64 are balanced. As a result of that Pistons 13a, b and cylinders 12a, b have the same dimensions the pistons reach theirs practically at the same time End positions in such a way that they are closest once lying together and farther the other time apart.
  • the shield 3 is in the hydraulic diagram with a Pump system 15 and a pressure relief valve 20 shown.
  • Pressure accumulators 63, 68 supplement any Leakage amounts on the high pressure and the Low pressure side.
  • Pressure line 60 and suction line 59 go in the form of hydraulic hoses that run parallel to the tension elements 24 are guided from the shield 3 to the second Braking device 8b and further as branches 60a, 59a via the clutch 77b to the first braking device 8a, the structure of which can be seen from FIG. 4.
  • On the Braking devices are switching valves S11, S12, respectively as well as S21, S22, which depend on the Piston end positions the clamping on the clamping elements 9a and 9b with an overlap of the clamp no unwanted slip against the pipe wall 1 occurs.
  • the second clamping element 9b is now in the axial direction rigidly connected to the piston 13b.
  • the shield moves in steps like this, the speed with the throttle 21 can be preset.
  • FIG 4 is the spatial arrangement of the components the braking device 8a shown.
  • the brake cylinder 12a with floor 22 and intermediate floor 23 forms with a Intermediate piece 16a is a supporting housing for the remaining elements.
  • a Coupling 77b with a spherical body 33 and a socket connects the intermediate bodies 16a, 16b of the two Braking devices 8a and 8b.
  • the spherical body 33 is so big dimensioned that hydraulic lines 65, 66, 59a, 60a, 158a, 158b can be put through.
  • the allowable Axial deflection between pan and spherical body 33 is limited to avoid unnecessary hydraulic hoses Suspend loads.
  • the switching valves S11, S12 are attached to the transition to the intermediate floor 23, the Switch valve S11 one end position each until it is reached the next end position.
  • the connecting line 75a to the clamping element 9a is first on the Intermediate floor 23 guided and then continues as Hydraulic hose on the front side of the piston rod 27a and as a bore in the piston rod 27a to the clutch 77a.
  • a guide cam 29 on the end face along the intermediate piece 16a will.
  • the structure of the second braking device 8b with its Clamping element 9b is analog.
  • Clamping elements 9a, 9b are shown in FIGS. 3a, 3b.
  • the piston rods of the associated clamping pistons 19 protrude into the middle part 76 and act on a displacement body 18 with inclined surfaces 81.
  • sliding blocks 17, which as Clamping jaws 11a, 11b are designed to move to the inclined surfaces 81 and to counter surfaces 82 and protrude through slots 83 through the contour of the central parts 76 out.
  • Bottoms form the end of the clamping cylinders 76 34.
  • a return spring 79 causes a low pressure Releasing the clamping and retracting the jaws 11a, 11b.
  • the clamping element 9b is here on its outside from the tension elements 24 and the supply lines 60, 59 happens. But it would also be possible to use the piston rods as double-sided, hollow piston rods and the Execute piston 19 with a larger central bore, around a central pull and push rod, for example at the same time also houses the lines 59, 60, therein to accommodate.
  • FIG. 5 Another embodiment of a step by step Braking device is shown in Figures 5, 6 and 7, in which the braking device 8 has only one brake piston 13 with a piston rod 28 running through on both sides has and the displaced secondary liquid 10 over a throttle point 21 on the piston 13 is relaxed.
  • the Tension elements 24 (once dashed, once pulled out) are as flexible ropes or straps on the Braking device 8 and attached to the clamping element 9b and in a loop 25 via a deflection roller 26 on the shield 3 guided. This means that the shield 3 only the Half of the relative movement between the housing of the Brake device 8 and the clamping element 9b executes.
  • the clamping hooks 11b are the second Clamping element 9b extended while at home first Clamping element 9a the jaws 11a are retracted.
  • This causes the piston 13 to be relative to the pipe wall stands still and that the shield 3 with half of the Speed moved forward from housing 16. Of the Piston 13 thus reaches the intermediate floor 23 on the other side of the cylinder while the secondary Liquid 10 through the same throttle point 21 in reverse direction can be relaxed.
  • An advantage this arrangement is that for the secondary Liquid almost no piping is necessary. The heat generated by throttling is transferred to the Cylinder outer jacket led to the bypass.
  • a Another advantage is that all switching valves S30, S12, S22 for reversing the clamping on the second Clamping element 9b can be accommodated.
  • Figure 7 shows one Hydraulic diagram from which a circuit can be seen, with which the reversal of the clamping takes place.
  • a pump 15 In the shield 3 are a pump 15, a pressure relief valve 20 and a High pressure and a low pressure accumulator 63, 68 housed, which via lines 59, 60 with the second clamping element 9b are connected.
  • the connection takes place via rollable hydraulic hoses.
  • a Switch valve S30 engages the end positions of the piston 13 indirectly from the tension element 24, with a switch takes place each time an end position is reached, i.e. an reached end position remains saved until the next is reached.
  • the lead to the first Clamping element 9a is in the via a check valve Switching valve S12 guided, which on passage in both Directions will switch as soon as the second Clamping element 9b the high pressure is reached by clamping. So there is again a small overlap in the Clamping.
  • the clamping elements 9a, 9b in FIG. 3a and 3b can be used.
  • FIG. 8 Another shield 3 with pressure booster 135, Gas storage 95 and cleaning device 5 is shown in FIG. 8 shown.
  • the cleaning unit 5 is on the downstream side integrated in the shield 3.
  • she consists essentially of nozzles 36, 37, 38 and one the baffle 39 upstream of the nozzles, which for Pipe wall 1 creates a cavity 40 in which the Jet streams for targeted smashing of deposits 6 are easier to keep under control.
  • Some nozzles 36, 37 are directed to the deposits 6 on the pipe wall.
  • Other nozzles 38 are forward towards the tube axis 14 directed to detached particles in their To suck liquid flow around and around these particles Housing or on the baffle to a size crush, wash away to the front with the passing liquid flow 7 allowed.
  • the Baffle grille 39 is also said to detach prematurely Prevent deposits and thus pipe blockages prevent.
  • the lattice structure is formed by bores 52 reached.
  • a ring 41 near the pipe wall with nozzles 36 prevents residual deposits in the range of sealing packs 42 remain.
  • An exterior Housing part 136 carries the sealing to the tube wall 1 Packs 42, which are fixed via retaining rings 142.
  • a inner housing 146 is over a front and one rear cover with the outer housing part 136 connected.
  • Have the pressure difference across the plate 3 pressures of 20 to 30 bar have proven to be sufficient, to dissolve incrustations of paraffins with the nozzles. Higher pressures are possible, keeping an eye on must that the braking devices 8 correspondingly strong must be interpreted.
  • a backflow device 141 is installed in the shield 3, the one with reverse flow direction a large one releases additional flow cross-section.
  • An over a spring 143 biased piston 141 is inside Housing 146 mounted and gives the reverse Flow direction a passage surface 140 and Muzzle 47 free.
  • This room 139 becomes rearward from a commercially available pressure booster 135 limited, the connection 133 for the drive in this Room opens out while a low pressure connection 144 is in shape a connecting pipe 145 with play through the piston 141 through to the mouth area 47 on the baffle 39 protrudes to the pressure booster driving flushing liquid.
  • the Pressure booster 135 is a brand Iversen HC2 from Sherex Industries Ltd., 1400 Commerce Parkway, Lancaster, N.Y., USA.
  • the pressure booster 135 has a high pressure outlet 134 at which Flushing liquid in a pre-adjustable increased pressure is pending, for example, leakage losses in one Compensate high pressure system during pipe cleaning.
  • the pressure acts on you Hydraulic hose 148 and a connecting pipe 157, the is locked with a nut 157 on the liquid side 153 of a gas storage 95.
  • the gas storage 95 is included a separating piston 154 for liquid 153 and forms a soft, strongly biased spring to Clamping cylinder 93 over an approximately constant pressure, i.e.
  • the delivery pressure of the Pressure booster 135 is slightly lower than that specified gas pressure with extended clamping cylinders in order really only in case of leaks in the liquid part liquid reload.
  • Clamping cylinder 93 with permanent Clamping effects are shown later in FIGS. 9 and 11 described.
  • An outer housing 152 from the gas storage 95 forms the pan with a lid 151 Ball joint 149, which on a retaining ring 150 on Extension 147 of the inner housing 146 is secured.
  • the Pressure booster 135 is designed so that Reverse pressure in the backflow in the pressure booster Pilot valve the liquid area 153 with the Connection tube 145 short-circuits.
  • a braking device 8 is shown in FIGS. 9 and 10 shown, in which two connected via a bridge 128 Rolls 89 with the bridge 128 radially to the pipe wall be pressed.
  • the pressing is done by a Clamping cylinder 93, which is based on a slide shoe 96 supports the opposite side of the pipe with a Clamping piston 94 on a guided in a guide 121 Sliding element 123 and further on a pivot axis 122 of the bridge 128 transmitted.
  • the clamping cylinder 93 is via a high pressure fluid 112 and a Hydraulic line 114 with a traveling gas storage 95 ( Figure 8) connected, the pressure is set so that with sliding shoe 96 grinding on the pipe wall pressed and at the same time braked rollers 89 die Form clamping elements 9, which at their points of contact adhere to the pipe wall and the feed rate determine.
  • An outer housing 130 absorbs the forces Direction of the pipe axis and transfers it via pins 119 and tabs 120 on adjacent links.
  • Hydraulic line 114 ends with a port 113 for one Hydraulic hose. The clamping force is from the bridge 128 Transfer to the rollers 89 via axes 118.
  • the roles 89 are rotatable as axles 115 on the axes 118 stored and form with an anchored on the axis Stator 117, which carries wing 116, one volumetric pump.
  • a braking force by the characteristics of the Throttle points 131 is determined.
  • Shaft seals 126 seal the bearings 125 of the rollers towards the outside.
  • the wings 116 are also with lugs guided in a circumferential groove 124.
  • That kind of a Braking device 8 has the advantage that it is short and can be assembled into a multi-link chain that, if the links are offset by 90 ° to each other, can also drive through narrower pipe bends.
  • the necessary Number of coupled braking elements 8 also depends from the differential pressure across the shield 3, if one certain feed rate not exceeded shall be.
  • the clamping force for the rollers 89 may only be so be chosen high so that the sliding shoes 96 shield 3 do not block.
  • FIGS. 11, 12, 13, 14 Brake device 8 Another one is shown in FIGS. 11, 12, 13, 14 Brake device 8 described. It prevents you uncontrolled feed of the cleaning device 5, by the rotation of the rollers 89 by a Clamping cylinders 93 are pressed against the inner tube wall 1, a thrust crank drive is driven, which consists of two 90 ° offset hydraulic brake cylinders 91a, 91b, the piston rods 97 directly offset by 90 ° to the Roll 89 are connected.
  • Bearings 107 enable the thrust crank mechanism, which means the piston 90 through a secondary liquid 10 Throttle points 92 drives, and in each case at the dead center of the first cylinder 91a the largest volume flow and the greatest braking effect with the second cylinder 91b reached.
  • the double roller 89 is supported in a slide bearing 108, whose bearing bush 111 is pressed into two supporting bodies is. These two support bodies can be swiveled on both sides via a common axis 102 on a support body 100 attached the one in the area of the sleeve 111 has slot-shaped recess 99.
  • a clamping cylinder 93 creates the necessary by a liquid 112 Contact pressure, which continues into a piston 94 Cone 105 and thus into two pivotable support bodies 101 is initiated and the bushing 111 with bearing 108 presses the double roller 89 against the inner tube wall 1.
  • the reaction force corresponding to the pressing force of the roll is over a common axis 104 and in the Support body 100 built-in clamping cylinder 93 in one sliding shoe 96 opposite the roller is initiated, the one with the appropriate normal force against the Inner tube wall is pressed, which is caused by the axial Expansion of the slide shoe with the pressed roller together leads to a three-point support that tilts the entire unit from the pipe axis prevented and also by the additional sliding friction allows smaller dimensions of the thrust crank unit.
  • This braking device 8 can increase the Cleaning necessary nozzle pressure using articulated elements 104, which are fastened with axes 106, with others same braking device elements 8 are connected, what with higher pumping power for cleaning used liquid flow at the same Feed speed with increased cleaning pressure in the nozzles 36, 37, 38 leads from the shield 3.
  • a reversing plate 103 is described in FIG with a label 3 as described in FIG. 8, can work together.
  • the flow reverses, the Flow resistance on the shield 3 by a Backflow device 141 reduced.
  • a reversing sign 103 at the other end have the relaxed braking devices 8 and the Withdraws shield 3.
  • Pulling prevents wedging of the elements.
  • the Reversing plate 103 therefore consists of a carrier plate 69, which is arranged centrally with play in tube 1 and through lateral guide fins 80 in this middle is held.
  • the support plate 69 is a Hinge pin 12 connected to the two flap wings 73a are mounted like a butterfly valve, whereby the elliptical flap wings, however, only one Reach acute-angled extension position 71 to the pipe axis can, in which the pipe cross section largely is closed.
  • the biggest game to the pipe wall is in the area of the ends of the hinge pin 72, while the Ends of the flap wing over obstacles such as weld seams can slide away.
  • the pressure on the flap wings 73a stands, minus the friction of the flap wings on the Pipe wall, available as traction.
  • a pressurized Metal bellows 85a which is arranged in a housing 85b is pressed against the pressure of a return spring 74 Jack 86 in their stop. Only when the pressure in the Metal bellows 85a sinks, what with the flow reversal is coupled, the flap wings 73a are released, so that it is supported by an expansion spring that in grooves 73b lies in the flow can.
  • the metal bellows 85a is over a Pressure port 84 kept under pressure. For his Use as an actuator speaks only small strokes are necessary because of the low power requirement can be made small and that there are no seals are the disturbance variables that generate friction or leakage.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
EP96810471A 1996-07-18 1996-07-18 Appareil de nettoyage pour oléoducs ou gazoducs Withdrawn EP0819480A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP96810471A EP0819480A1 (fr) 1996-07-18 1996-07-18 Appareil de nettoyage pour oléoducs ou gazoducs
EP97928390A EP0918574B1 (fr) 1996-07-18 1997-07-10 Appareil de nettoyage de canalisations pour oleoducs ou gazoducs
DE59704470T DE59704470D1 (de) 1996-07-18 1997-07-10 Rohrreinigungsgerät für erdöl- oder gaspipelines
AU32704/97A AU3270497A (en) 1996-07-18 1997-07-10 Pipe cleaning apparatus for oil or gas pipelines
CA002261110A CA2261110C (fr) 1996-07-18 1997-07-10 Appareil de nettoyage de canalisations pour oleoducs ou gazoducs
PCT/IB1997/000858 WO1998003274A1 (fr) 1996-07-18 1997-07-10 Appareil de nettoyage de canalisations pour oleoducs ou gazoducs
US08/895,929 US6070285A (en) 1996-07-18 1997-07-17 Pipe cleaning apparatus for oil or gas pipelines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96810471A EP0819480A1 (fr) 1996-07-18 1996-07-18 Appareil de nettoyage pour oléoducs ou gazoducs

Publications (1)

Publication Number Publication Date
EP0819480A1 true EP0819480A1 (fr) 1998-01-21

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Application Number Title Priority Date Filing Date
EP96810471A Withdrawn EP0819480A1 (fr) 1996-07-18 1996-07-18 Appareil de nettoyage pour oléoducs ou gazoducs
EP97928390A Expired - Lifetime EP0918574B1 (fr) 1996-07-18 1997-07-10 Appareil de nettoyage de canalisations pour oleoducs ou gazoducs

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP97928390A Expired - Lifetime EP0918574B1 (fr) 1996-07-18 1997-07-10 Appareil de nettoyage de canalisations pour oleoducs ou gazoducs

Country Status (5)

Country Link
US (1) US6070285A (fr)
EP (2) EP0819480A1 (fr)
AU (1) AU3270497A (fr)
DE (1) DE59704470D1 (fr)
WO (1) WO1998003274A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103203347A (zh) * 2012-12-05 2013-07-17 中建安装工程有限公司 一种水力驱动的弹性运动刷装置

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Publication number Priority date Publication date Assignee Title
FR2767179B1 (fr) * 1997-08-08 1999-09-10 Coflexip Systeme multi-outils utilisable pour le raccordement de conduites
DE19820290A1 (de) * 1998-05-07 1999-11-11 Pipetronix Gmbh Rohrleitungsfahrzeug
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EP0918574B1 (fr) 2001-08-29
AU3270497A (en) 1998-02-10
US6070285A (en) 2000-06-06
DE59704470D1 (de) 2001-10-04
WO1998003274A1 (fr) 1998-01-29
EP0918574A1 (fr) 1999-06-02

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