EP0084867B1 - Rohrgassen-Manipulator zum Hochdruck-Abschlämmen von Wärmetauschern - Google Patents

Rohrgassen-Manipulator zum Hochdruck-Abschlämmen von Wärmetauschern Download PDF

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Publication number
EP0084867B1
EP0084867B1 EP83100498A EP83100498A EP0084867B1 EP 0084867 B1 EP0084867 B1 EP 0084867B1 EP 83100498 A EP83100498 A EP 83100498A EP 83100498 A EP83100498 A EP 83100498A EP 0084867 B1 EP0084867 B1 EP 0084867B1
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EP
European Patent Office
Prior art keywords
manipulator
tube passage
tube
tubes
coupling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83100498A
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German (de)
English (en)
French (fr)
Other versions
EP0084867A1 (de
Inventor
Erich Kaetscher
Johannes Stoss
Robert Weber
Dieter Zoeberlein
Jakob Weber
Josef Forster
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.)
Kraftwerk Union AG
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Kraftwerk Union AG
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 DE19823202248 external-priority patent/DE3202248A1/de
Priority claimed from DE19833301536 external-priority patent/DE3301536A1/de
Application filed by Kraftwerk Union AG filed Critical Kraftwerk Union AG
Publication of EP0084867A1 publication Critical patent/EP0084867A1/de
Application granted granted Critical
Publication of EP0084867B1 publication Critical patent/EP0084867B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/002—Component parts or details of steam boilers specially adapted for nuclear steam generators, e.g. maintenance, repairing or inspecting equipment not otherwise provided for
    • F22B37/006—Walking equipment, e.g. walking platforms suspended at the tube sheet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
    • F22B37/483—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers specially adapted for nuclear steam generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
    • F28G1/166—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris from external surfaces of heat exchange conduits

Definitions

  • the invention relates to a pipe lane manipulator for high-pressure blowdown of heat exchangers, in particular for the tube sheet area of the steam generators of nuclear power plants, according to the preamble of claim 1.
  • a pipe lane manipulator according to the preamble of claim 1 is known.
  • a spray lance is pushed by hand through a steam generator hand hole through the pipe alley and pivoted back and forth by a motor.
  • the lance is positioned in the correct spraying position by observing the nozzle jet and by adjusting the lance: the water jet is atomized or scattered when the pipes are hit, which is not desirable; the water jet is closed when the nozzles spray precisely into the intermediate spaces between the pipes.
  • the insertion of the lance, its positioning and its advance is relatively cumbersome and time-consuming. It should be noted that the operator is exposed to an increased dose of radiation while at the steam generator hand hole.
  • the invention has for its object to provide a pipe lane manipulator according to the preamble so that overcoming the difficulties described, the insertion or assembly in the working position and the removal or disassembly of the manipulator can be carried out much more conveniently and the positioning in the injection position and the Feed can run largely automatically, so that observations through the hand hole or by means of suitable television cameras can only be limited to random control observations.
  • the pipe duct manipulator designated as a whole in FIG. 1, hereinafter referred to simply as the manipulator, is used for high-pressure blowdown of heat exchangers which are provided with at least one pipe duct 2 within their bundle of heat-exchanging pipes.
  • FIGS. 1 and 2 Such a steam generator is shown in detail in FIGS. 1 and 2. It has the already mentioned Rohrgasse 2 in the middle between the two legs 3a, 3b of its U-tube bundle 3.
  • the tube bundle 3 is sealed with the ends of its heat-exchanging tubes 3 'in corresponding bores of the tube sheet 4, that is to say in particular welded in, the primary chamber spaces of an inlet and an outlet chamber being to be considered below the tube sheet 4.
  • the housing shell of the steam generator forming a pressure vessel is designated by 5; an annular space 7 is left between it and the shirt 6 surrounding the tube bundle 3, which is normally referred to as a drop space and - as shown in FIGS.
  • 1 and 2 - can also be used to perform service operations.
  • service operations For this purpose are distributed over the circumference of the jacket 5, arranged as a whole with 8 closable service openings, which are also referred to as hand holes and are provided with removable or re-sealable hand hole covers 9.
  • the diametrically opposite two hand holes 8.1 and 8.2 lie in alignment with the longitudinal axis 2 'of the Rohrgas se 2; they are used for pasting and restoring removing the manipulator 1.
  • those 8.3 and 8.4 are offset by 90 ° with respect to the hand holes 8.1, 8.2; they are used to insert the suction proboscises 10.2 located at the ends of suction hoses 10.1, the suction hoses 10.1 being connected to suction pumps 10.
  • the 90 ′ hand holes 8.3, 8.4 are used to insert so-called pigs, that is pressure hoses 11.1 with nozzle heads 11.2 at their ends, which are connected to high-pressure pumps 11.
  • a distribution box 11.3 is arranged, for example; for the sake of simplicity, the pump is not shown for the other pressure line 11.1.
  • the direction of flow of the rinsing liquid is indicated by the arrows sp; this is in the ring zone 7 via the nozzle heads 11.2 with high pressure of z. B. 100 bar injected and then sucked from the suction heads 10.2 together with the deposit.
  • the height distance of the center line of the hand holes 8 from the tube sheet 4 is approximately 250 to 300 mm.
  • the tube sheet is grooved in the area of the ring zone 7, so that an annular groove is formed in which the deposits torn off by the rinsing process with the manipulator 1 and also with the nozzle heads 11.2 collect and are suctioned off from there can.
  • the other hand holes are each shown closed with a lid 9; if necessary, however, they can also be opened for flushing purposes for introducing the pressure and suction hoses 11.1, 10.1.
  • the spray head 13 of the manipulator 1, equipped with nozzles 12, is inserted through the hand hole 8.1 into the pipe alley 2 and is movable in this pipe alley 2 along the longitudinal axis 2 'of the pipe alley and can be positioned such that the spray jets of the spray head 13 are each in the pipe grid spaces, which can also be called pipe grid streets, are directed.
  • the roughly kidney-shaped lines 14 in FIG. 1, compare the outline 14 in FIG. 2, indicate the location of mud mountains which are removed by the spraying process by means of the manipulator 1 and finally eliminated.
  • the sludge water that accumulates and contains the torn deposits reaches the outer circumference through the pipe grid streets 15 (see FIG.
  • the spray pressure for the spray head 13, which is connected to a high-pressure hose 13.1, is approximately 220 bar.
  • So-called deionate is used as spray water, which is chemically treated water, the conductivity of which must be below 100 IlS and the pH value of which must be between 5 and 10.
  • the deionized is from a reservoir of z. B. 3 m 3 content removed.
  • the water sprayed into the steam generator is then pumped out and returned to the storage container via a filter unit.
  • the circulating deionized water is continuously monitored for its pH value and conductivity during the cleaning process and is renewed if the aforementioned limit values are no longer met.
  • the outer water circuit with reservoir, pumps, filters and monitoring device is not shown, since it is not necessary to understand the invention.
  • the spray head 13 is carried by a stepping mechanism m0 of the manipulator 1 which can be inserted into the pipe alley 2 through a service opening (e.g. hand hole 8.1 in FIG. 1) and can be moved remotely therein.
  • the nozzles 12 of the spray head 13 can be positioned in their respective spray position of a spray position sequence extending over the entire length of the pipe aisle in that the walking mechanism m0 conforms to the pipe division with extendable and retractable clamping feet k1, k2 and k3, k4 on the pipes 3 'of the two opposite one another Pipe lane sides 2a, 2b can be clamped.
  • the manipulator with its striding mechanism m0 and its spray head 13 is in the spraying position, ie. that is, both the clamping feet k1, k2 in the clamping plane aa and the clamping feet k3, k4 in the clamping plane bb are in the extended, clamped position, in which they lie on the pipes 3 'with the concave clamping surfaces adapted to the pipe contour, in the case shown it is the pipes 3.1,3.2,3.3 and 3.4.
  • FIG. 3 A comparison of FIG. 3 with FIG. 5 shows that there are three types of pipe grid lanes in the pipe grid configuration shown: 90 ° lanes 15.1, 30 ° lanes 15.2 and 150 ° lanes 15.3.
  • the manipulator 1 must be able to spray with its spray jets through all these different types of alleys, for which purpose different spray heads with correspondingly oriented spray nozzles are provided.
  • a 90 ° spray head is shown, that is, its nozzles 12 are at right angles to the longitudinal pipe axis 2 'or the feed axis of the manipulator 1, so that the tubular grid streets 15.1 can be sprayed with these nozzles.
  • the individual pairs of nozzles are specifically called 12a, 12b, 12c.
  • the direction of the spray nozzle orifices 12 and their distance from the clamping planes bb and aa of the clamping feet k are matched to the pipe pitch t such that the spray jets 16 (see FIG. 4) in any case into the pipe grating lanes 15 (see FIG. 5) or 3, the pipe lattice alleys 15.1 arrive. If one understands t the distance between two adjacent heat exchanger tubes from one another in the longitudinal direction of the pipe aisle, then the nozzle orifices 12 also have this distance from one another, i.e.
  • This formula also applies analogously to spray heads, the nozzles of which are not at right angles, but z. B. under one Radiate angles of 30 ° or 150 ° to the pipe lane longitudinal direction into the pipe lattice lanes if you consider the intersection of the nozzle axis with the pipe connection line cc parallel to the pipe lane direction 2 'as a distance criterion. This means that in this case the nozzle jet is always aligned with the center of the pipe lattice lanes 15 (see FIG. 5).
  • FIGS. 3 and 4 and even more clearly the FIGS. 6 to 8 explained below show that the walking mechanism m0 can be moved along the feed axis v, which coincides with the central axis 2 'of the tube lane 2.
  • the walking mechanism m0 consists of at least two walking mechanism members m1, m2 which can be moved with respect to one another in the feed axis v and which can also be referred to as the first and second walking mechanism members.
  • Each of the walking mechanism members m1, m2 can be locked with at least one pair of clamping feet k1, k2 or k3, k4 on the tubes 3 'located on both sides of the tube lane 2.
  • the feed motor which is generally designated by C, is also mounted on the second walking mechanism member m2, the movable drive member of which is arranged within the sealing collar 18 and is connected to the first walking mechanism member m1. It can be an electric motor with a gear, the z. B.
  • the traveling nut rotates a spindle, wherein the axially displaceable but non-rotatably mounted traveling nut is connected to the first walking mechanism member.
  • it can also be hydraulic or pneumatic piston-cylinder systems. This also applies analogously to the actuators B1, B2 of the clamping feet k3, k4 and the actuators A1, A2 of the clamping feet k1, k2, which are optionally surrounded by sealing sleeves 19 and 20, respectively.
  • Pneumatic piston-cylinder systems are particularly advantageous, and can be acted on from two sides, as will be explained.
  • FIG. 3 and 4 also show that the spray head 13 with its high-pressure hose connection 13.2 forms a separate structural unit which can be coupled to the walking mechanism m0 by means of a quick coupling 21.
  • This coupling is indirect, since the spray head 13 is connected to a traveling nut 22.1, which is mounted on the vertical threaded spindle 22 of an elevator member 23 (see in particular FIG. 4) in a rotationally fixed but longitudinally or vertically adjustable manner.
  • the elevator member 23 consists of a vertical frame with bottom and top-side bearing plate 23.1.23.2, the already mentioned, rotatably mounted on the bearing plates vertical threaded spindle 22, also mentioned, on the spindle rotatably and height-adjustable Wan dermutter 22.1 as a support body of the spray head and one of the spindle ends, in the present case the upper, associated rotary drive, of which only a coupling pin 23.3 for coupling a drive shaft can be seen in FIG. 4.
  • the quick coupling 21 as well as the elevator member 23 are only simplified and shown schematically in FIGS. 3, 4, they are likewise described in more detail with reference to FIGS. 6 to 8.
  • the elevator member 23 has the particular advantage that at the start of the spraying process the spray head 13 can begin with the spraying process not in the lower position shown in FIG. 4 but in a higher position, because in general (compare the Schlammberg contours in FIG. 1 and Fig. 2) more or less large amounts of sludge have accumulated between the inspection cycles and these are best removed from top to bottom. So you go through the pipe lane 2 with the manipulator 1 so that the mud mountains are removed from top to bottom or washed out, successively with each passage through the pipe lane the spray head 13 with its elevator member 23 is adjusted a little downwards.
  • 6 to 8 show constructive details of the manipulator with its spray head, identical parts to the previous figures also have the same reference numerals.
  • 7 shows the feed motor C, designed as a stepping piston-cylinder system which can be acted upon from two sides, the stepping cylinder c2 being connected to the stepping member m2 and the stepping piston c1 being connected to the first stepping member m1.
  • the first walking mechanism member m1 is essentially a cylinder block, which has the cylinder bores of the two tensioning piston-cylinder systems A1, A2 (FIG. 6) and the bores arranged in a rectangle for the piston guide rods points. The latter are labeled a4, the cylinder bore is labeled a3.
  • the second walking mechanism member m2 is also essentially a cylinder block, which not only contains the cylinder bore c3 for the walking piston c1, which is oriented in the feed direction v, but also transverse to the cylinder bore b3 for the two tensioning pistons of the tensioning piston-cylinder system B1 , B2 of the clamping plane bb.
  • four holes b4 arranged in a rectangle are provided for receiving the associated tensioning piston guide rods.
  • Bottom and top sides of the second treadmill link m2 have approximately T-shaped guide grooves 24 and 25 milled (see also FIG.
  • the first treadmill link m1 has a bottom and a top-side guide rail 24a or a correspondingly double-T-shaped cross-section 25a is guided in a longitudinally displaceable manner.
  • the guide rails 24a, 25a are firmly connected to the cylinder block of the first stepping mechanism member by means of cylinder screws, in particular Allen screws.
  • the piston rod c11 of the walking piston c1 is screwed into a corresponding threaded bore 27 of the last-mentioned cylinder block, the piston plate c12 of which can be moved back and forth in the cylinder bore c3 so that it can be acted upon from two sides.
  • a plate-shaped cylinder head gasket which is centrally penetrated by the piston rod c11, is designated c4, the piston ring seated in an annular groove of the piston c12 with c5 and the other ring seals in the cylinder head gasket c4 with c41.
  • the tensioning pistons a1, a2 and b1, b2 are indicated by dashed lines in FIG. 6; the associated piston guide rods are designated a11, a21, b11 and b21. Like the piston rods a12, a22, b12, b22, these are connected at their outer ends to the support feet k1 to k4; the latter have an approximately saddle-shaped contour to adapt to the heat exchanger tubes.
  • the plate-shaped cylinder head gaskets for sealing the cylinder chambers and the piston rod bushing are generally designated a41 and b41.
  • Fig. 8 shows in cross-section and in an external view the two tensioning piston-cylinder systems B1 and B2.
  • This shows the clamping piston version with the piston ring b5 in a corresponding piston ring groove and the ring seals b42 on the cylinder head gasket b41.
  • the clamping feet are tightened by means of strong countersunk screws 270 on the piston rods of the tensioning pistons.
  • the compressed air connections for the walking piston c1 are designated c + and c-, the plus symbol symbolizing that the associated compressed air connection is used to extend the piston, the minus symbol accordingly symbolizes a compressed air connection, when the piston is actuated when the piston is retracted.
  • the tensioning pistons whose common compressed air connections for extending are designated a + or b + and their compressed air connections assigned to each individual tensioning piston for insertion are designated a1-, a2-, b1- and b2-.
  • the compressed air connections consist of nipples that are suitable for quick coupling and uncoupling of the compressed air lines.
  • the guide plate 17 already mentioned with reference to FIG. 4 is fastened on the floor side to the second walking mechanism member m2; it could also be designed as a skid.
  • the first walking member m1 is also provided on the bottom side with a guide plate 17.1 of the same height as the guide plate 17 or with corresponding skids.
  • These guide plates or skids 17, 17.1 expediently consist of an abrasion-resistant plastic as well as the guide strips 28 provided on the top side on both longitudinal sides of the mower mechanism m0, which are screwed to the cylinder block of the second mower mechanism m2 at 28.1. They serve to additionally guide the walking mechanism m0 on the two rows of pipes c-c directly adjacent to the pipe lane and can be replaced by other suitable guide strips depending on the width of the pipe lane of the steam generator to be cleaned.
  • FIG. 6 shows that the spray head 13 consists of a solid spray head housing with a central bore 13.3, from which the branch bores 13.4 leading to the individual spray nozzles 12.3a, 12.3b (upper half of FIG.
  • a threaded bore 13.3a is arranged at the outer end of the central bore 13.3.
  • Corresponding threaded bores 13.4a are each provided at the outer ends of the branch channels 13.4, into which the spray nozzles can be screwed tightly with corresponding threaded necks 12.4.
  • the upper nozzles 12.3a, 12.3b are used for the free spraying of 150 ° tubular grid streets 15.3 (FIG. 5); they belong to a four-nozzle spray head, but a six-nozzle or an eight-nozzle spray head could naturally also be provided according to FIG. 3.
  • nozzles The number of nozzles is limited by the performance of the high pressure pumps; with a high pressure pump of 240 kw, a spray head with eight nozzles forms the upper limit, i. that is, there is no noticeable drop in pressure yet.
  • a spray head with the spray nozzles 12.2a, 12.2b is shown, which belongs to a four-nozzle spray head and is used for the free spraying of pipe lattice streets 15.2 (see FIG. 5), which is an angle of 30 ° to the feed direction v or the longitudinal direction of the pipe aisles. It could also be six- or eight-jet.
  • the elevator member 23 is in turn connected to the walking mechanism m0 by means of a quick coupling, for which purpose the elevator member 23 is provided on its walking mechanism side with a coupling extension 30 and the walking mechanism m0 is provided on its rear end face with a corresponding coupling recess 31.
  • the clutch extension 30 is sweeps out a coupling prism with a circular segment cross-section which is approximately 3/4 of a circumference, wherein the coupling extension 30 in which a corresponding internal cross-section having coupling recess 31 can be inserted from above.
  • the coupling position is, see Fig. 7, defined and secured by a ball ratchet 32.
  • the elevator member 23 and the walking mechanism m0 also lie on the mating surfaces 34 with flat contact surfaces 33, so that the alignment of the spray head 13 with its longitudinal axis to the feed direction v is thus ensured.
  • the coupling extension 30 is clamped to the vertical frame of the elevator member 23 by means of cylinder screws 35.
  • Fig. 7 cover-side bearing plate 23.2 is angled upwards and thus forms a bearing leg 23.4.
  • the upper end of the spindle 22 meshes via a bevel gear 36 with a drive bevel gear 37, the shaft 38 of which is mounted in a bearing bush 39 of the vertical plate leg 23.4.
  • An elongated drive crank 40 can be coupled to the outer drive coupling extension 23.3 of the drive bevel gear shaft 38.
  • This consists of the actual crankshaft 40.1 with crank 40.2 and the shaft housing 40.3, the latter of which can be placed centering on the bearing bush 39 with a cup-shaped extension, the shaft 40.1 coupling with a corresponding coupling recess 40.11 to the knife-shaped coupling extension 23.3.
  • a drive motor on the cover-side bearing plate 23.2 which is coupled to a drive pinion of the spindle 22 (not shown), in particular via a reduction gear.
  • Suitable direct drive motors for such a remote-controlled rotation of the threaded spindle 22 are, in particular, electrical direct current or multiphase stepper motors.
  • the bottom-side bearing plate 23.1 is connected to the skid 41 or is made in one piece with it.
  • the skid 41 has four sliding foot parts 41.1 and 41.2 on two fork-like extensions 41.3 on the tube plate (FIG. 6).
  • the threaded spindle 22 is rotatably supported at its two ends in bearing bushes 42, 43, the latter being inserted into corresponding recesses in the bottom and top-side circuit board 23.1, 23.2.
  • the support body 22.1 consists of the wall nut part 22.1 with an internal thread, a fork part 22.1b for holding the coupling pin 29 and for locking the coupling hook 13.5 and a guide part 22.1 with an approximately T-shaped recess which includes the vertical frame of the elevator member 23 and on this is guided longitudinally and rotatably.
  • the spraying and cleaning process with the described manipulator 1 is particularly effective when working with a spray head which has at least three spray nozzle pairs lying one behind the other in the feed direction v, the spray nozzles of each spray nozzle pair on opposite sides of the spray head for loading each Tube bundle half are arranged, as is shown in Fig. 3 in principle with the spray head 13 or was explained with the spray head 13 of Fig. 6 (the spray head designs of the upper and lower half of Fig. 6 are by at least one further pair of spray nozzles to be considered).
  • Such a spray head can then be used to carry out a spraying process in which the spray head is advanced by at least one pipe pitch, preferably by two pipe pitches, after each partial spraying process, in which all at least three pairs of nozzles spray in the respective pipe lane position, so that after at least one pair of pipe grid alleys, preferably two pairs of pipe grid alleys, sludge-releasing and pre-rinsing and, accordingly, at least one adjacent pair of pipe grid alleys is subsequently rinsed after the first and each further partial injection process.
  • This method can best be carried out with an eight-nozzle spray head, which therefore has four pairs of spray nozzles, because then two pairs of pipe grid alleys can be sludge-detaching and pre-rinsing, and the adjacent two pairs of pipe grid alleys can be sprayed and the feed of the manipulator or spray head between the partial spraying operations is two pipe divisions.
  • This advance of two pipe divisions is also the basis of the manipulator shown in FIG. 3 and in FIGS. 6 to 8, because the distance of the heat exchanger pipes in the feed direction v of the two rows of pipes closest to the pipe gases to which the manipulator is clamped is always two pipe divisions ( 2 xt).
  • the manipulator 1, i.e. H. his m0 stepping mechanism can also be equipped with lighting devices such as headlights and television cameras so that the progress of the spraying and rinsing process can be monitored remotely on a monitor.
  • the special advantage of the manipulator is that it is easy to handle: the m0 walking unit can be conveniently brought into its starting position through the open hand hole and coupled with the elevator and spray head.
  • the stroke of the walking piston c1 or the walking piston system C is set precisely to two pipe divisions. In this way it can walk intrinsically safely without a complicated control mechanism along the pipe lane and center itself on the heat-exchanging pipes.
  • a lock is expedient which only allows the spray nozzles to be acted upon when the walking mechanism m0 is clamped with all four clamping feet.
  • the pneumatic control is very robust. Just as the manipulator can be moved in the feed direction v, the backward movement takes place. It is generally not necessary to turn the treadmill at the end of the pipe lane because the last pipe lane lanes have no sludge deposits. In principle, however, it would also be possible to provide the two front sides of the vehicle with a spray head, either for alternating loading of both spray heads or for simultaneous loading in order to intensify the spraying and rinsing process. Since practically all operations can be carried out remotely, there is a remarkable saving in Mann-Rem.
  • FIG. 9 shows a top view of the two individual manipulators 1a and 1b of the same construction, which can be moved in the feed direction v or -v within the tube alley 2 of a U-tube steam generator on a longitudinal rail 50a, 50b parallel to the longitudinal axis 2 'of the tube alley.
  • the first two rows 3a1, 3a2 and 3b1, 3b2 of the two legs 3a, 3b of the U-tube bundle are shown for the sake of simplicity.
  • the clear width 2.1 of the pipe lane 2, which results between the first two rows of pipes 3a1, 3b1, is not fully available, but is divided by tie rods 51 arranged in the middle of the pipe lane, so that two relatively narrow sub-lanes 2a1 on the pipe lane side 2a and 2b1 on the pipe lane side 2b on both sides of the tie rods 51 or on both sides of a vertical plane of symmetry conceived by the longitudinal axis 2 '.
  • the tubes of the U-tube bundle, denoted as a whole by 3, are individually denoted by 3 '.
  • FIG. 11 one can see in the cut-out the tube sheet 4 of the steam generator housing which forms an essentially hollow cylindrical pressure vessel, of which a wall section is indicated at 5 in FIG. 13.
  • Each of the individual manipulators 50a, 50b consists of a walking mechanism m0, an elevator member 23 (FIG. 10) coupled to it, and a spray head 13 mounted on the elevator member 23 with adjustable height, with spray nozzles, which are generally 12 and in particular 12.1 a, 12.1 b, 12.1 c and 12.1 d are designated (see in particular FIGS. 1 and 2).
  • the treadmill consists of two treadmill members that can be moved relative to one another in the feed axis v, namely a first m1 on the front and a second m2 on the rear.
  • the front step member m1 of the manipulator 1a has the clamp foot k1a, its rear step member m2 the clamp foot k2a.
  • the corresponding clamping feet in the walking mechanism m0 of the second manipulator 1b are designated k1b and k2b.
  • the pairs of clamp feet k1a, k2a and klb, k2b are shown in the extended position, in which they have concave base parts matched to the heat exchanger tube contour, just on the heat exchanger tubes 3 'of the front clamping plane aa and the rear clamping level bb.
  • the concave parts of the foot are labeled 52.
  • Pneumatic piston-cylinder systems A (stepping elements m1) and B (stepping elements m2) are used to actuate the clamping feet, which are generally designated by k.
  • the abutment for the pneumatic locking of the treadmill m0 or its treadmill members m1, m2 on the heat exchanger tubes 3 ' is formed by a vertical leg 50.1 of the guide rails 50a, 50b having an L-shaped profile, on which the treadmill m0 with its rows of tubes faces away from the long side, as explained in more detail below.
  • the walking mechanism m0 furthermore has a feed motor C, which likewise consists of a piston-cylinder system, the cylinder c2 being connected to the walking mechanism member m2 and the piston c1 of the feeding motor C being connected to the front-mounted walking mechanism member m1 (see in particular FIG. 10).
  • the piston-cylinder systems A, B and C of the walking mechanisms m0 of the two manipulators 1a, 1b can each be acted upon from two sides; they are explained in detail in the first exemplary embodiment, which is why a detailed description can be dispensed with here.
  • a1, b1 are the tensioning pistons and a3, b3 are the associated cylinders of the piston-cylinder systems A of the clamping plane a-a and B of the clamping plane b-b.
  • the walking mechanisms m0 can advance in the direction of advance v if, when locked in the clamping plane b-b, the clamping feet k1a, k1b of the clamping plane a-a are released, i. H. be retracted, and the feed motor C is acted on in such a way that its piston c1 is extended with the front-end stepping element m1 connected to it, in this case by two pipe divisions t to form a clamping plane a1-a1 indicated by the dashed line.
  • both manipulators 1a, 1b are advanced at the same time, so that they work in the spraying process in the respective spraying position in the same way as the manipulator according to the first exemplary embodiment with the double spray head.
  • Each of the manipulators 1a, 1b has the already mentioned elevator member 23 on the spray head side of the walking mechanism m0.
  • This consists of a vertical frame with bottom and top bearing plates 23.1, 23.2, a vertical spindle 22 rotatably mounted on the bearing plates, a support body 22.1 with a traveling nut part 22.1 a mounted on the spindle so as to be non-rotatable and height-adjustable, and a rotary drive assigned to one of the spindle ends, which is denoted as a whole by Dr.
  • the spray head 13 is suspended with a hinge projection 13.6 on a pin 22.11 of the support body 22.1; it is positively supported with its hinge projection on corresponding support surfaces of the support body 22.1.
  • This mounting of the spray head 13 is again used for quick assembly and disassembly.
  • the spray head 13 can thus be adjusted in the manner of an elevator upwards in the direction of the arrow h + or downwards in the direction of the arrow h-, so that an adaptation to different levels of mud on the tube sheet can be carried out.
  • These mountains of mud are generally sprayed progressively from top to bottom.
  • the injection pressure (compare first exemplary embodiment) is in the range between 100 and 220 bar, preferably approximately 200 bar.
  • spray heads 13 There are generally three different types of spray heads 13 used: the one shown with 90 ° nozzles 12.1, which spray into the pipe lattice lanes in the direction of 15.1, and also 300 and 150 'spray heads, which are designated with 15.2 and 15.3 and Spray the pipe grid alleys indicated by dashed lines.
  • the quick coupling between the elevator member 23 and the walking unit m0 takes place via a dovetail-shaped projection 21.1 on the vertical frame part 23.0 of the elevator member 23 and a corresponding dovetail-shaped groove on the rear end face of the walking member m2.
  • the rotary drive Dr has an angular gear formed from bevel gears, and a long drive crank for remote adjustment can be coupled to the shaft of the drive bevel gear mounted in the vertical plate 23.4 via its coupling pin 23.3.
  • a drive motor attached to the frame of the elevator member 23 could also be provided.
  • Fig. 10 and in particular in Fig. 11 can be seen in the horizontal leg 50.2 of the L-shaped guide rails 50a, 50b inserted longitudinal springs 53 of approximately T-shaped cross section, which z. B. made of machined brass and serve the precise guidance of the manipulators 1a, 1b by this overlap with the side flanks of a bottom-side, also approximately T-shaped longitudinal groove 54 in cross section, the longitudinal spring 53. From Fig.
  • a guide arm 55 which is attached pointing in the feed direction on the rear step member m2, has an approximately T-shaped cross section and engages in a corresponding T-shaped longitudinal groove of the front step member m1, which in this way Likewise is precisely guided without it itself being in engagement with the longitudinal spring 5.3.
  • the walking mechanism m0 of the manipulator 1a, 1b is in the space spanned by the two L-legs, the vertical leg 50.1 and the horizontal leg 50.2, which is fastened in an adjusted manner on the tube sheet 4 and is limited in width by the nearest row of tubes 3a1 and 3b1 inserted with an approximately rectangular cross-section lower base body 56.
  • This base body 56 belongs to the rear step member m2. As already explained, this base body 56 is generally provided on the bottom side and / or on its side abutting the vertical L-leg 50.1 with projections or recesses with which it rests on corresponding recesses or projections of the horizontal and / or vertical L-leg 50.2, 50.1 of the guide rail generally designated 50 is slidably guided in the feed direction v.
  • this guide exists for the base body 56 and thus for the manipulator 1a, 1b, the elevator member 23 shoots in the guide engagement between the already mentioned longitudinal spring 53 and the side flanks of the bottom side in cross section, as does the longitudinal tongue T-shaped longitudinal groove 54.
  • the base body 56 also overlaps with a projection 57 arranged in the upper region of its one side flank, the upper end of the vertical L-leg 50.1 and is trapezoidally toothed at this upper end in the manner of a tongue and groove guide and slidably guided in the feed direction.
  • a guide rail 50a, 50b with an approximately L-shaped cross-section is installed within the two pipe aisle halves 2a1, 2b1, forming a double rail, the vertical L-legs 50.1 of which face one another.
  • the two identical stepping mechanisms m0 of the manipulators 1 a, 1 b each of which is slidably guided on a single guide rail in the feed direction v (or -v).
  • the clamping feet k of the two individual walking mechanisms m0 each point laterally outwards from the vertical center plane (axis 2 ') to the adjacent tube row 3a1 or 3b1 of the heat exchanger and can be extended in this direction.
  • the two guide rails 50a, 50b are combined in a twin arrangement at one end U2 to form an elongated U-rail body 58 in plan view.
  • the two guide rails 50a, 50b have, in the merging area, on the outer sides of their horizontal L-legs 50.2 facing away from one another with axially parallel fitting surfaces 59.1 and stop cams 59 provided with oblique clamping surfaces 59.2.
  • the distance between the clamping surfaces 59.2 from one another exceeds the pipe aisle width 2.1 (cf. FIG. 9).
  • the two guide rails 50a, 50b are also fastened in the merging area with their vertical L-legs 50.1 to a rectangular connecting web 60 (see also FIG. 14).
  • This connecting web 60 serves as a bearing for a tensioning device 61.
  • This has an adjusting spindle 61.1, which is mounted in a corresponding threaded bore in the connecting web 60 and can be screwed in, with a pressure piece 61.2 at its free end.
  • the U-rail body 58 which bypassing the tie rods 51, can be inserted into the Rohrgasse 2 from the right-hand end and abuts the end tubes of the first two rows of pipes 3a1, 3b1 with its stop cams 59.2 by tensioning the adjusting spindle 61.1 on the heat exchanger wall 5 with the pressure piece 61.2 on the one hand and by means of the inclined surfaces 59.2 on the end pipes on the other hand and positioned in the desired relation to the rows of pipes.
  • the pressure piece 61.2 is spherically adjustable at the free end of the spindle 61.1 and has a spherical contact surface 61.21.
  • a corresponding joint socket 62 in the interior of the pressure piece 61.2 engages around a ball 63 at the free end of the spindle 61.1.
  • the threaded shaft of the spindle 61.1 is followed by a knurled or corded handle cylinder 64 so that the spindle 61.1 can be easily adjusted by hand.
  • a coupling plate 66 provided with an adjusting wedge 66.1 can be inserted with its adjusting wedge 66.1 between the two guide rails 50a, 50b, as shown, and tightened by means of set screws 66.2 on the threaded blocks 65 in such a way that the guide rails 50a, 50b with at least one second pair of mating surfaces 67, which sits near the open end of the U-rail body on the sides of the horizontal L-legs 50.2 facing away from one another, with heat exchanger tubes 3 'of the first row of tubes 3a1 and 3b1, which are in contact with the tube lane 2, come to rest.
  • the position of the U-rail body 58 to the adjacent first Rohrrei hen 3a1, 3b1 set free of play.
  • the defined horizontal position is given by the fact that the cylinder screws 680 screwed into the underside of the horizontal L-legs 50.2 are ground to a uniform dimension.
  • the U-rail body 58 lies in a defined manner on a flat tube sheet.
  • two pairs of mating surfaces are sufficient, namely 67.67 at the left end and 59.1, 59.1 at the right end.
  • the coupling plate 66 is provided with a bow handle 66.4 for better handling.
  • the handling of the rail system is further facilitated if the individual guide rails 50a, 50b are cross-divided into at least two rail parts and have a rail joint 68 over approximately half their length.
  • recesses for receiving coupling plates 69 and 70 are provided on the bottom and sides of both rail halves, which are screwed and pinned to the rail ends.
  • the T-legs from the T-profile of the longitudinal springs 53 have been omitted at least over a length of strider in the attachment area near the open end U1 of the U-rail body (its closed end is designated U2) on the length 53.1 (Fig. 13), so that the walking mechanisms m0 with their cross-sectionally T-shaped longitudinal groove 54 can be mounted on this longitudinal spring 53 and can engage behind the T-profile of the longitudinal spring 53 when pushed further.
  • the manipulators 1a, 1b are rerailed on when the U-rail body 58 is adjusted at its end U1 by means of the coupling plate 66, through a corresponding hand hole.
  • the manipulators 1a, 1b are moved back to their starting position in the area U1 and disassembled. Accordingly, the U-rail body is dismantled in reverse order as described and the hand holes are removed from the Rohrgasse.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Manipulator (AREA)
  • Cleaning In General (AREA)
EP83100498A 1982-01-25 1983-01-20 Rohrgassen-Manipulator zum Hochdruck-Abschlämmen von Wärmetauschern Expired EP0084867B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3202248 1982-01-25
DE19823202248 DE3202248A1 (de) 1982-01-25 1982-01-25 Rohrgassen-manipulator, spritzkopf und zugehoeriges spritzverfahren zum hochdruck-abschlaemmen von waermetauschern
DE19833301536 DE3301536A1 (de) 1983-01-19 1983-01-19 Rohrgassen-manipulator
DE3301536 1983-01-19

Publications (2)

Publication Number Publication Date
EP0084867A1 EP0084867A1 (de) 1983-08-03
EP0084867B1 true EP0084867B1 (de) 1985-06-19

Family

ID=25799067

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83100498A Expired EP0084867B1 (de) 1982-01-25 1983-01-20 Rohrgassen-Manipulator zum Hochdruck-Abschlämmen von Wärmetauschern

Country Status (5)

Country Link
EP (1) EP0084867B1 (es)
JP (1) JPS59500065A (es)
DE (1) DE3360268D1 (es)
ES (1) ES8504379A1 (es)
WO (1) WO1983002657A1 (es)

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RU2721154C2 (ru) * 2015-10-30 2020-05-18 Фраматом Гмбх Гибкая пика для механической обработки или обследования трубной решетки котла

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JPS60235999A (ja) * 1984-05-09 1985-11-22 Babcock Hitachi Kk 伝熱面清掃装置
US4676201A (en) * 1984-07-25 1987-06-30 Westinghouse Electric Corp. Method and apparatus for removal of residual sludge from a nuclear steam generator
FR2573179B1 (fr) * 1984-11-13 1987-02-13 Framatome Sa Dispositif d'enlevement des boues pour installation de nettoyage de la plaque tubulaire d'un generateur de vapeur et installation comportant un tel dispositif
FR2577035B1 (fr) * 1985-02-05 1987-03-20 Thome Emmanuel Outil destine a la destruction des boues formees dans les generateurs de vapeur des reacteurs nucleaires a eau pressurisee
FR2578957A1 (fr) * 1985-03-12 1986-09-19 Thome Paul Amelioration aux generateurs de vapeur des reacteurs nucleaires
EP0195994A3 (de) * 1985-03-29 1987-02-04 Siemens Aktiengesellschaft Rohrgassen-Manipulator zum Hochdruckabschlämmmen von Wärmetauschern
US4700662A (en) * 1986-06-13 1987-10-20 The Babcock & Wilcox Company Sludge lance wand
BE905193A (nl) * 1986-07-29 1986-11-17 Smetjet N V Inrichting voor het met een waterstraal reinigen van een stoomgenerator.
BE1000357A4 (nl) * 1987-02-26 1988-11-08 Innus Ind Nuclear Service Inrichting voor het reinigen van een warmtewisselaar.
EP0459597A1 (en) * 1987-03-18 1991-12-04 Electric Power Research Institute, Inc Flexible lance for steam generator secondary side sludge removal
FR2666679B1 (fr) * 1990-09-10 1994-03-04 Framatome Procede et dispositif d'extraction d'une canne chauffante presentant des deformations, d'une enveloppe de pressuriseur d'un reacteur nucleaire a eau sous pression.
FR2682215B1 (fr) * 1991-10-07 1994-01-07 Framatome Dispositif porteur mobile pour realiser des interventions dans la partie secondaire d'un generateur de vapeur d'un reacteur nucleaire a eau sous pression.
US6672257B1 (en) 1994-05-06 2004-01-06 Foster-Miller, Inc. Upper bundle steam generator cleaning system and method
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FR2723634B1 (fr) * 1994-08-12 1996-10-31 Framatome Sa Dispositif de nettoyage par jet de liquide d'une plaque tubulaire d'un echangeur de chaleur et utilisation.
EP0815389A1 (de) * 1995-03-15 1998-01-07 Siemens Aktiengesellschaft Vorrichtung und verfahren zum bearbeiten oder inspizieren eines rohrbodens eines dampferzeugers
ES2141477T3 (es) 1995-03-15 2000-03-16 Siemens Ag Lanza flexible para realizar trabajos o inspecciones en una plataforma de tubos de un generador de vapor.
FR2738053B1 (fr) * 1995-08-25 1997-11-07 Sra Savac Installation pour le nettoyage a la lance a eau d'un generateur de vapeur et son procede de mise en oeuvre
DE10006056A1 (de) 2000-02-10 2001-08-30 Siemens Ag Flexible Lanze zum Bearbeiten oder Inspizieren eines Rohrbodens eines Dampferzeugers
NL1024113C2 (nl) * 2003-08-14 2005-02-15 Peinemann Equipment Bv Lansinrichting met reciprocerende aandrijving.
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US8470073B2 (en) 2010-09-15 2013-06-25 Savannah River Nuclear Solutions, Llc Apparatus and process for separating hydrogen isotopes

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Also Published As

Publication number Publication date
EP0084867A1 (de) 1983-08-03
WO1983002657A1 (en) 1983-08-04
ES528140A0 (es) 1985-04-01
ES8504379A1 (es) 1985-04-01
DE3360268D1 (en) 1985-07-25
JPS59500065A (ja) 1984-01-12

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