EP2534437A2 - Dispositif destine au nettoyage interieur de tubes - Google Patents

Dispositif destine au nettoyage interieur de tubes

Info

Publication number
EP2534437A2
EP2534437A2 EP10807438A EP10807438A EP2534437A2 EP 2534437 A2 EP2534437 A2 EP 2534437A2 EP 10807438 A EP10807438 A EP 10807438A EP 10807438 A EP10807438 A EP 10807438A EP 2534437 A2 EP2534437 A2 EP 2534437A2
Authority
EP
European Patent Office
Prior art keywords
scratches
heat exchanger
water
tube
cleaning
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Withdrawn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
EP10807438A
Other languages
German (de)
English (en)
Inventor
Karl-Heinz Grüter
Falk Jaresch
Original Assignee
Jarin GmbH
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 DE102010010281A external-priority patent/DE102010010281A1/de
Priority claimed from DE102010010280A external-priority patent/DE102010010280A1/de
Priority claimed from DE201010052517 external-priority patent/DE102010052517A1/de
Application filed by Jarin GmbH filed Critical Jarin GmbH
Publication of EP2534437A2 publication Critical patent/EP2534437A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F28G1/12—Fluid-propelled scrapers, bullets, or like solid bodies
    • 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
    • F28G1/163—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris from internal surfaces of heat exchange conduits
    • 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
    • F28G15/00—Details
    • F28G15/08—Locating position of cleaning appliances within conduits

Definitions

  • the invention relates to a device for internal cleaning of
  • Heat exchanger tubes in particular of cooling tubes industrial cooler.
  • coolers occur, for example, in power generators or chemical plants.
  • the heat exchangers are used in particular as so-called capacitors. He serves there to liquefy the exhaust steam. This allows a closed
  • Contemporary capacitors in power generation plants exist as water-cooled surface capacitors. They have tube bundles. Through the cooling tubes of Abdampfkondensatoren cold cooling water is guided. The exhaust steam condenses on the outer surface of the cooling tubes.
  • the number of cooling tubes in a condenser can be large. A number of 20,000 cooling tubes is not uncommon for the power plant capacitors. Depending on the design, heating of the cooling water in the cooling tubes should take place at 8 to 10 degrees Celsius.
  • the cooling water is usually taken from the environment.
  • Cooling of the vapor creates a negative pressure in the condenser, which is regularly referred to as a vacuum, although in the strict sense it is not a vacuum.
  • This negative pressure is of great importance for the efficiency of the steam-powered power plant. The efficiency becomes one
  • CONFIRMATION COPY largely determined by the pressure difference between the pressure (in the flow direction of the steam) in front of the steam turbine and the pressure behind the steam turbine. Since the cooling of the steam from the heat transfer in the
  • Cooling tubes made of copper are also popular.
  • Copper has significant corrosion problems. Upon contact with oxygen, copper oxides form. Oxygen is found in the cooling water, as well as in the steam.
  • the deposits usually lead to a deterioration of the heat transfer of the cooling tubes. As a result, the cooling performance decreases.
  • the scratches have different shapes.
  • Recurring is the shape of resilient hook, the hooks are connected at one end to the scratch and slide with the other, hook-shaped end on the inner wall of the cooling tube. The sharper the hooks, the better
  • the hooks at the contact ends are called blades.
  • the scratches can be in different shapes and forms
  • the hooks at their end, with which they touch the inner surface of the cooling tube adapted to this surface, that is, curved.
  • the scratches are preferably moved with pressurized water through the cooling tubes.
  • the scratches are formed piston-like at one end. Piston-like, because there is no defined piston clearance. Rather, it must be considered that the deposits have different thickness.
  • piston-like end must adapt to that. This is usually done with sealing lips at the end of the scratch.
  • the sealing lips can with low
  • Permeability to the pressurized water may be beneficial to the scrapings previously scraped off by the hooks / cutting forward from the in
  • the guns have a front nozzle, with which the guns are pressed by hand into the opening of a cooling tube. At the same time pressed with a dome-shaped sealing part of the gun against the radiator plate in which the cooling tubes are held.
  • Body weight of a cleaning man can match or even go far beyond.
  • the object of the invention has been found to simplify and facilitate the handling of the device referred to as a gun for the cleaning personnel.
  • Cooling tubes / heat exchanger tubes protruding part of which is provided with a spreading mechanism. By spreading the projecting into the cooling tube gun end the gun can be clamped and fixed there, so that the
  • the spreading mechanism can have different shapes.
  • An advantageous embodiment provides for the use of elastic, annular on the projecting into the cooling tube end material before.
  • Compressing creates a thickening, with which the gun in the
  • the elastic material may be rubber or compliant plastic such as elastomers.
  • the elastic material can be used in the form of conventional O-rings. It is possible to arrange several rings in the axial direction one behind the other. Other profiles can also be used. Especially advantageous are profiles that show an elongated cross-section in a running in the axial direction section. Such cross sections may, for example, have straight and / or round and angular surfaces. Rectangular cross sections and oval cross sections are included.
  • Such molds can be produced economically with a corresponding number of pieces.
  • the molds can be cut from solid material with sufficient strength of the rubber or elastomer.
  • a sufficient strength can be clarified by one or a few tests.
  • sufficient strength is provided by rubber and elastomer, which are used for commercially available hose lines according to DIN 7341-1.
  • the shapes according to the invention may be formed by a tube section. In this case, hoses with a wall thickness of at least 1 mm, preferably of at least 1.5 mm and even more preferably of at least 2 mm and most preferably of at least 2.5 mm are favorable.
  • Such hoses made of rubber and elastomers are commercially available, even with a fiber reinforcement. This extends the possible service life and increases the usability.
  • cooling tubes with nominal diameters in mm of 15; 20; 25; 32; 40; 50; 65 opposite.
  • Cooling tubes must be pressed and thereby the cooling tubes on a for the Positioning required length will be exempted from the narrowing deposit.
  • hose sections with the following outer diameters can be directly or indirectly machined
  • Inner diameter / nominal diameter of the pipe of at least 0.5 mm
  • the tube sections are bulged in the radial direction against the tube inner wall. This happens, for example, by axial compression. Thus, the faces of the tube sections are gently pressurized when compressed, are at the end faces of the
  • Hose sections preferably provided with a metal cap.
  • the Metal cap can be made of thin sheet, for example, with a thickness of less than or equal to 0.6mm, preferably less than or equal to 0.4mm and even more preferably less than or equal to 0.3mm.
  • the metal cap preferably covers at least 50%, more preferably at least 70%, and most preferably at least 90% of the associated one
  • the metal cap comprises the hose section at the associated end with an edge of at least 2 mm, more preferably of at least 4 mm and most preferably of at least 6 mm in the axial direction.
  • Deformation of the resilient material may be effected by means of a power piston which presses the resilient material against, for example, a flange / flange fixed to the gun against a flange / flange fixed on the gun, or the elastic material between two flanges movable on the gun. Squeezing strokes or one
  • Stop / flange forms a pressure surface and can be formed by already existing or additional parts.
  • a movable sleeve with a stop it is advantageous to provide a movable sleeve with a stop to provide a movable stop or to form the stop by the movable sleeve.
  • the sleeve can at the same time completely or partially Form nozzle and / or form all or part of the water pipe of the gun to the nozzle.
  • the sleeve may be arranged in whole or in part on the nozzle displaceable and / or be arranged in whole or in part displaceably on the water pipe of the gun.
  • the pressure water supply is flanged in the direction of movement of the piston in front of the piston to the cylinder.
  • the piston rod is hollow and serves as a water supply to the nozzle of the gun.
  • the nozzle sits at the end of the piston rod protruding out of the cylinder.
  • the piston rod penetrates the end wall of the cylinder.
  • On the outside sit on the piston rod a movable sleeve. Between sleeve and nozzle are a plurality of axially successively arranged O-rings
  • the nozzle, the O-rings and the sleeve have one
  • Pipe inner surface is to be expected.
  • a load of the piston with pressurized water causes a movement of the piston and the piston a train on the piston rod, so that the train also acts on the nozzle and the nozzle moves against the O-rings, while the sleeve rests against the end face of the cylinder and can not escape, so that the O-rings deform under magnification of the diameter and press against the pipe inner wall.
  • the expansion is for expanding the elastic, annular material, for example, a conical or a different inclined extending mandrel suitable, which may also have a sleeve shape and in the central opening of the elastic and preferably in the axial Direction fixed elastic material acts.
  • the expanding mandrel can in turn be weaved with a piston or other mechanism.
  • motors can be used.
  • the motors may be pressurized water driven motors or pneumatic driven motors.
  • the control of the motors can be carried out in the same way via the drive medium or via intermediate valves as in the other variants of the invention.
  • the motor is replaced with water or another medium, e.g. operated with compressed air.
  • valve in the gun is indeed of conventional
  • the diversion of pressurized water for the piston takes place before the valve for regulating the pressure water for the nozzle.
  • the Regardless of the position of the gun in the cooling tube be sure that the pressurized water supply to the nozzle is started, interrupted, continued or stopped.
  • valve in the gun lead to the piston can simultaneously assume an on or off position, and if this valve as well as the valve can be locked in the supply line to the nozzle in the desired position, thereby opening up other advantages.
  • valves are at the same time provided with a pressure limiter.
  • the pressure limiter allows the gun to react automatically when a blockage occurs. Then the pressure limiter on a
  • Pressure increase respond and bring the valve in the off position, in which the pressure water supply to the nozzle is interrupted. After that, the scratches can be tried by pulsating pressure and / or with a
  • the pressure limiter can respond to a pressure drop when a scratch has fallen out of the cooling tube after the cleaning end. With such a pressure drop, the valve in the supply line to the nozzle is also triggered and the pressurized water supply interrupted.
  • the shaking loose of the scratch can be done with two guns according to the invention, if the valves on both pistols, a valve position
  • the pressurized water supply is interrupted and in the Water supply to the nozzle is released.
  • the second gun can be used on the cooling tube inlet and alternately with the gun on
  • Cooling tube input can be actuated so that the stuck scratches alternately from the one side and the other side can be acted upon with pressurized water.
  • a ventilation of the line to the nozzle on the other side is provided.
  • valve actuation can be electrically / electronically controlled.
  • various functions of the valves can be controlled.
  • the controller can respond to specific operating pressures in front of and behind the valve.
  • the controller can effect the necessary pressure changes for a shaking operation.
  • the controller may also respond to the particular operating pressure discussed above, which occurs when the scratches have traversed a cooling tube and exited the cooling tube. Then the controller can respond faster and safer than the operator and set the gun to Off, so that a pressure loss is avoided. This is important when of one
  • the controller may also include a safety shutdown, which will be effective when a gun has not yet found a sufficient seat in a pipe. Then the gun with a high-pressure jet could pose a danger to the cleaners.
  • the controller may also visually and / or acoustically and / or by vibration indicate each operating condition.
  • the optical displays can be formed by light-emitting diodes.
  • the vibration through magnets, the acoustic through miniaturized speakers.
  • Pressure sensors are measured each operating pressure and processed with the controller.
  • the controller can be linked to displacement sensors. This can be used, among other things, to shut down the gun if the gun does not reach the correct position in a cooling tube.
  • the control can be encapsulated in the gun, staying or apparent.
  • the power source in the form of the button cell or other form is preferably interchangeable and moisture proof in the gun. The moisture protection is by appropriate
  • All guns can be supplied with pressurized water by the same pump.
  • a pump system with a pressure vessel arranged between the pump and pistols. As a result, the equalize
  • a compressed air supply to the piston of the gun is provided.
  • the compressed air is generated by a compressor.
  • Compressed air tank between compressor and guns. This equalizes the pressure conditions and facilitates the connection of different guns.
  • a further variant of the invention provides that, instead of pistons and rings in the front region, with which the gun projects into a cooling tube, provided an inflatable or inflatable bellows.
  • the bellows simplify the construction effort of the guns.
  • the bellows can like the piston with pressurized water or compressed air are applied and controlled.
  • the guns according to the invention with the expandable region on the input side sit so far in the cooling tubes, that there is a distance from the input-side plate, in which the Kuhlrohr are held together.
  • the seat of the guns according to the invention in the cooling tubes is also chosen so that the spreadable range extends beyond the input-side plate of the radiator. The result is a relief of the cooling tube from the spreading pressure, because the spreading pressure is absorbed to a substantial extent by the input-side plate.
  • the cooling pipes are accessible even in the narrowest space.
  • the pistols can be positioned with a rod or with long tongs.
  • the guns can also be operated from some distance.
  • the invention is based on the recognition that the introduction of scratches considerable trouble.
  • the scratches are in front of the gun in each case to be cleaned
  • pressurized water is available due to the described cleaning with scratches and pressurized water. Therefore, there is no need for another source of pressurized water for the hammer.
  • Compressed air is usually available in large operating systems. Alternatively, compressed air can be easily generated with a portable compressor.
  • the current is optionally generated by a generator.
  • the conversion of the chisel takes place in pointed chisels in that a sleeve or a rod is made with a blind hole.
  • the inner diameter of the sleeve and the diameter of the blind hole are adapted to the Spitzm facedel matmesser so that they can be mounted on conventional pointed chisels.
  • pointed chisel instead of the pointed chisel, other commercially available chisels can be used. These include in particular flat chisel, the at the
  • Cutting edge are processed so that they fit into a blind hole described above or the pipe opening described above.
  • the conventional bits are hardened or tempered, so that machining is difficult is. Nevertheless, other editing options are available. These include, for example, grinding and spark erosion.
  • the sleeve or rod can also be shrunk onto the corresponding bit end.
  • the sleeve or rod is glued to the corresponding bit end.
  • various adhesives are suitable.
  • suitable adhesives include, for example, cyanoacrylate adhesives as they are used for screw locking.
  • the cyanoacrylate adhesives are chemically curing adhesives. There are also physically setting adhesives.
  • the right glue can be selected with just a few application attempts.
  • an advantageous tool combination is created, which firstly fulfills the desired function, namely the impressions of the scratches in the tubes, and secondly fulfills the desired function, namely the trouble-free and secure tool imple in the chisel hammer.
  • the second feature is by using the tool holder in the chisel hammer
  • the sleeves or rods are adapted to the scratch side of the shape of the corresponding scratch end. Most scratches are profiled on the contact surface where the scratches are traditionally in
  • Cooling tubes are beaten.
  • the profiling has different reasons.
  • the invention takes advantage of the profiling to guide the scratches when introduced into the cooling tubes and to prevent tilting. Tilted scratches can easily get stuck. Eliminating such errors causes extreme workload. In addition, the scratches may be unusable after removal of such error.
  • the tool according to the invention is given at the projecting end of the chisel hammer a length which is at least equal to the minimum length with which the gun must penetrate into the cooling tubes to drive in the form described above, the scratches through the cooling tubes.
  • the minimum length is maintained in that the sleeve or rod is given a collar, which with the chisel hammer to rest on
  • Cooling tube can be brought.
  • the front end of the sleeve or rod in front of the collar then defines the extent to which the scratches have been driven into the tube.
  • the collar is located on the hammer-side sleeve end or rod end.
  • a tool according to the invention is able to drive different scratches, which are intended for the same cooling tubes, in these cooling tubes, is in the expectation.
  • the same tool is also suitable for driving scratches in at least one other cooling tube with a larger or smaller nominal size.
  • the invention has also recognized that after the exit of the scratches considerable effort is waiting for the cleaning staff. At the outlet of the cooling pipes, the dissolved deposits and the well-worn scratches accumulate in a heap. The scratches must be separated from the deposits for the following reasons:
  • the amount of deposits accumulated during a cleaning process can be much more than 1 tonne in weight.
  • the tight constrictions at the outlet of the cooling tubes arise from the design of the radiator.
  • the cooling tubes form namely a tube bundle, wherein the various cooling tubes are held upstream and downstream in common plates.
  • the inflowing cooling water must be on the
  • the effluent cooling water is either bundled and discharged in a line or the cooling water is subjected to further cooling in a downstream further cooler. In the case is between the two
  • Chambers provided a small-volume intermediate chamber or transfer chamber. This chamber has not only structural reasons. An advantage of this chamber and the merging of the cooling water and the subsequent redistribution of the cooling water to the cooling pipes of the downstream cooler include an advantageous mixture of the cooling water.
  • Radiator outlet a chamber. Their task is then collecting the effluent cooling water and its derivative.
  • the upstream chamber of a cooler and the outflow chamber are usually accessible only through small manholes.
  • a simplification of the cleaning work and a relief is achieved in that the emerging from the cooling tubes together with water and deposits scratches are sieved from the mixture. It is ideal if the extraction can be done before the mixture collects on the bottom of the chamber.
  • the screen can be put together from various stable elements that can be mounted through each manhole in the chamber. at the assembly is preferably left a distance down so that the discharged from the cooling tubes deposits can fall through the sieve. It is also advantageous if between the container wall of the cooler and the sieve a device is provided, with which the fallen down deposits can be removed.
  • the reciprocating motion can be generated, for example, with a rod to which flaps are hinged so that the flaps collapse in one direction of travel and allow the material to lie down and fold out in the other direction of motion and take the material with it.
  • the device starting from the sequence in the one circumferential direction has a different conveying direction than in the other circumferential direction. This is then used to convey from each circumferential direction to the process can. That is, the hinges of the flaps are arranged so that they fold during a movement, which is directed away from the drain, and unfold during a movement, which is directed towards the drain out.
  • the rod With a round container, the rod can be provided with the same rounding as the container. Then the rod can perform the reciprocating motion in the circumferential direction despite the rounding.
  • the cleaning of the intermediate chamber of deposits can be supplemented by a slot-shaped drain, which extends as far as possible over the whole or a substantial part of the axial length of the intermediate chamber. If the container of the cooler does not have sufficient drainage, the deposits to be disposed of may even be required up to the manhole, when the device is shunted in the region of the side wall of the container.
  • the sieve is preferably made of wire mesh on which the from the
  • Cooling pipes discharged deposits can not find a substantial hold and fall through.
  • the screen preferably has a mesh size which is smaller than the diameter of the scratches to be collected, preferably less than 0.7 times, more preferably less than 0.5 times the diameter of the scratches to be collected. This is to prevent jamming or settling of the scratches in the sieve.
  • the mesh size should be as large as possible to one
  • the drive of the device can be done by means of conventional Hubmotore.
  • Hubmotore for example, chain drives, spindle drives,
  • the motors can be driven hydraulically, with compressed air or electrically. Pressurized water is available because of the above-described cleaning with scratches and pressurized water. An adjustment permissible pressures can be done with pressure relief valves.
  • compressed air is usually also available, which can optionally be used for the drive.
  • compressed air can be generated with a portable compressor.
  • the screening is done with a highly flexible net that can be easily felt through the manholes.
  • the mesh preferably has the same mesh size as the sieve.
  • the net can be mounted in different ways.
  • Mounting aids can be magnetic strips and / or other mechanical clamps or hooks.
  • the net is also laid out on the tank bottom and raised at intervals to collect the well-worn scratches from the net before the accumulation of deposits on the net is too large to be able to raise the net by hand.
  • Subjacent cooling tube bundle chamber under the sieve or under the network can be omitted in whole or in part, if the chamber volume is increased under the sieve or net, especially if the drain is funnel-shaped expanded.
  • a funnel opening is provided which extends at least over 50% of the axial length, even more preferably at least over 70% and most preferably over at least 90% of the axial length.
  • the funnel circumferentially extends over a circumferential angle of at least 10 degrees, even more preferably over at least 20 degrees, and most preferably over at least 30 degrees, based on a circumferential angle of 360 degrees for the entire circumference.
  • the structural measures for the design of the intermediate chamber or the chamber downstream of a cooler are easier to implement in new construction measures than in the case of modification measures.
  • the sieve / net can remain at least during the entire cleaning process, if the volume of the chamber under the sieve / net is big enough to all take up discharged deposits.
  • the sieve / net can even be placed permanently in the chamber as it falls through the sieve / net
  • the cleaning device according to the invention only roughly reminds us of conventional water pistols for cleaning cooling tubes.
  • a cooling pipe 15 is shown in dashed lines.
  • the cooling tube 15 belongs to a plurality of identical cooling tubes, which are arranged together in a cooler. In this case, the right end in the view of the cooling tube 15 is held with the same ends of the other cooling tubes in a plate, not shown, of the radiator.
  • the cooling tube 15 is shown shortened in the view.
  • the left end in the view of the cooling tube 15 is held with the same ends of the other cooling tubes in another plate.
  • the cooling tubes are traversed by water inside and flows around the outside of flue gases of a combustion, not shown.
  • the flue gases emit a significant part of their heat through the cooling pipes to the water.
  • the pressurized water is self-clamping with a in the cooling tube 15
  • the self-clamping device includes a cylindrical housing 16 with a pressurized water connection 12, and with a tube 17 which has a stipulatesöffhung 18 for the pressurized water and extends into the cooling tube 15 to a conical nozzle 9.
  • the nozzle 9 has a larger outer diameter than the tube 17.
  • There is a screw connection of the nozzle 9 is provided with the tube 17, which allows a replacement of the nozzle 9. The replacement is required to change the device
  • Adjust cooling tubes that have a smaller or larger inner diameter.
  • the parts to be replaced also include O-rings 5 and
  • the tube 17 at the same time forms a piston rod for a displaceably arranged in the cylindrical housing 16 piston 20.
  • the piston 20 in turn has an O-ring which seals the gap between the piston 20 and housing 16.
  • the housing 16 is closed at the left in the view of the end 3 or with a lid 4.
  • the piston 20 protrudes with a pin 1 1 through the lid 4 therethrough.
  • To the device according to the invention still includes a control block with a switch 13 and an actuating lever 2, which is hinged to the switch 13 and is supported in the operating state on the pin 1 1.
  • the device with the nozzle 9 is pushed into the cooling tube 15 until the housing 16 abuts the plate, in which the cooling tube 15 is held on the input side.
  • the operating lever 2 is brought into the illustrated position, in which a non-illustrated valve is opened and pressurized water flows into the housing 16.
  • the pressurized water fills the housing interior and penetrates the pressurized water through the opening 18 in the form of a tube piston rod, which directs the pressurized water to the nozzle 9.
  • the pressurized water exits from the nozzle 9 into the cooling tube 15.
  • the device according to the invention no longer has to be held by the cleaning staff during operation. This not only relieves the cleaning staff of the heavy physical work. This is especially true for hard to reach cooling tubes.
  • FIG. 2 and 3 shows an elastic rubber ring 31 with a central
  • the rubber ring was created by cutting to length a water hose.
  • the rubber ring is instead of the O-rings of Fig. 1, 4 to 6
  • the rubber ring 31 is seated at the same place on the piston rod designed as a sleeve. From the piston rod, the outer jacket is indicated by dashed lines 33.
  • the rubber ring 31 has a metal cap 32 at each end.
  • the sheet metal caps 32 distribute the pressure during axial compression of the
  • Rubber ring 31 evenly on the end faces of the rubber ring.
  • Fig. 3 shows the deformation of the rubber ring 31 to the axial
  • Fig. 7 shows the situation when inserting a scraper in a cooling tube 139, which is held with other cooling tubes in a plate 140.
  • Plastic lips 137 and a mandrel 138 are shown.
  • the plastic lips 137 are formed by a cross-sectionally W-shaped material whose outer edge is slotted on the circumference several times, so that the edge can fold when the scratch is pressed into the cooling tube 139.
  • the plastic lips 137 slide on the cooling tube inner wall.
  • the plastic lips 137 are riveted in the middle of the mandrel 38.
  • the mandrel 138 carries in a manner not shown various metallic
  • Cooling tube 139 pressed.
  • the sleeve 134 has a head 136 which is the
  • Corresponding end of the scratch is adjusted and helps in the centering of the scratch when the scratch penetrates into the cooling tube 139.
  • the sleeve 134 includes the working end of a pointed chisel 133.
  • a cyanoacrylate adhesive 135 is provided between the pointed bit 133 and sleeve 134.
  • the adhesive 135 carries in Aus spaihrungsbeispiel the
  • the pointed chisel 133 sits with its other end in the tool holder 131 of a pneumatic hammer 130.
  • the tool holder engages with a key, not shown, in a groove 132 of the tool end.
  • Pneumatic hammer 130 pushes the scratch into the cooling tube without significant operator effort.
  • the pneumatic hammer is in the embodiment, a small hammer of 1, 4 kg weight with the name Yokota BRH 6.
  • the mounting hole on the hammer for the chisel has a standard diameter of 10.2mm.
  • the tool according to the invention has hammer side the same dimensions as the otherwise provided chisel. That is, like a 10-piece chisel shaft.
  • the sleeve 134 in the exemplary embodiment has an outer diameter of 14 mm and thus smaller than the nominal diameter 15 (including occurring
  • the collar 141 is, however, determined in diameter larger than the nominal diameter of the cooling tubes, for which the tool
  • Figures 8 and 9 show a chamber connecting two coolers.
  • FIG. 8 shows a section of the chamber which connects a downstream cooler with a downstream cooler.
  • the rear radiator has cooling tubes 239 surrounded by a jacket 242 and held together in a plate 231.
  • Cooling tubes 238, a jacket 237 and a plate 233 are illustrated by the cooler in the direction of flow. Sheath and plate 237 and 233 have the same function as sheath and plate 242 and 231.
  • a further jacket 234 is arranged, which are connected by means of flanges 230 and 232 with the projecting edges of the plates 233 and 231.
  • the jacket 234 forms an intermediate chamber or transition chamber between the two coolers.
  • Cavity pressed which consists within the shell 237 and the cooling tubes arranged therein.
  • the cooling tubes absorb a portion of the heat containing the exhaust steam and pass the heat to the cooling water flowing through the cooling tubes 238.
  • the exhaust steam accumulates from the operation of a steam operation of a steam turbine with which a generator is driven, which generates electricity.
  • the exiting from the front radiator in the intermediate chamber cooling water is mixed in the chamber and pressed in a new distribution in the cooling tubes 39 of the downstream cooler.
  • a cleaning of the radiator shown takes place at regular intervals, a cleaning of the radiator shown.
  • intervals the number of operating hours is meant, in other exemplary embodiments, a cleaning is carried out only after finding a decreasing negative pressure in the cavity of a radiator.
  • the decreasing negative pressure is accompanied by
  • the cooler For cleaning, the cooler is taken out of service. This is usually synonymous with a business interruption of the power plant.
  • the cooler When decommissioning the cooler not only the steam supply, but also the cooling water supply is switched off.
  • the existing in the coolers cooling water is drained. This is done by drain openings at the lowest of the intermediate chamber.
  • the drain opening is formed by a nozzle 236 and a flange 235.
  • the flange 235 is intended for connection to suitable conduits or hoses.
  • the water flows to the drain after contact with the jacket 234.
  • the network is held by magnetic strips 241 and 243 in the illustrated position in the exemplary embodiment.
  • the cleaning process in the exemplary embodiment is interrupted in order to take up the network and free it from the scratches collected therein. Subsequently, in the exemplary embodiment, the deposits lying in the intermediate chamber are pushed into the drain opening. In this case, a slider can be used.
  • the pushing is by a water flush
  • the intermediate chamber is cleaned alone with a water rinse.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

Selon l'invention, des pistolets et des dispositifs analogues destinés au nettoyage de tubes de refroidissement sont bloqués à l'intérieur des tubes pendant le processus de nettoyage.
EP10807438A 2010-02-12 2010-12-21 Dispositif destine au nettoyage interieur de tubes Withdrawn EP2534437A2 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE102010007948 2010-02-12
DE102010010282 2010-03-07
DE102010010281A DE102010010281A1 (de) 2010-03-07 2010-03-07 Vorrichtung zur Innen-Reinigung von Rohren
DE102010010280A DE102010010280A1 (de) 2010-03-07 2010-03-07 Vorrichtung zur Innenreinigung von Rohren
DE201010052517 DE102010052517A1 (de) 2010-02-12 2010-11-26 Vorrichtung zur Innenreinigung von Rohren
PCT/EP2010/007822 WO2011098112A2 (fr) 2010-02-12 2010-12-21 Dispositif destiné au nettoyage intérieur de tubes

Publications (1)

Publication Number Publication Date
EP2534437A2 true EP2534437A2 (fr) 2012-12-19

Family

ID=47143456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10807438A Withdrawn EP2534437A2 (fr) 2010-02-12 2010-12-21 Dispositif destine au nettoyage interieur de tubes

Country Status (3)

Country Link
US (1) US20130152966A1 (fr)
EP (1) EP2534437A2 (fr)
WO (1) WO2011098112A2 (fr)

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US9777725B2 (en) * 2014-07-24 2017-10-03 Taizhou Dajiang Ind. Co., Ltd. High pressure water pump
US20160023336A1 (en) * 2014-07-24 2016-01-28 Taizhou Dajiang Ind. Co., Ltd. Phase transition heat storage device
CN110454002B (zh) * 2019-09-11 2021-06-15 龙南恩嘉智能科技有限公司 一种指纹锁
CN112902688A (zh) * 2021-03-24 2021-06-04 程勇 一种具有除杂功能的冷凝器
CN117072525B (zh) * 2023-10-12 2023-12-15 江苏领臣精密机械有限公司 一种静压主轴用液压油冷却装置

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Also Published As

Publication number Publication date
WO2011098112A3 (fr) 2011-10-13
WO2011098112A2 (fr) 2011-08-18
US20130152966A1 (en) 2013-06-20

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