DD273095A1 - METHOD AND ARRANGEMENT FOR CARRYING THE BLOW TUBE OF A WATER LIGHT BLADDER - Google Patents

Abstract

The invention relates to a sootblower for cleaning the heating surface of a combustion chamber, with a bent blower tube, the blowing head is controllable by superimposing a rotation of the blowpipe about a longitudinal axis and pivoting in a plane. The invention has for its object to achieve a more precise control of the blowpipe for carrying out predetermined blowing figures with a simple design. This is inventively achieved in that the blowing head is guided in a universal joint and the blowing head facing away from the end of the blowpipe in a Blasrohrlager. Which is articulated via a spindle nut with an adjustable spindle. - Fig. 1 - {water lance blower, guide, blowpipe, blow head, bend angle, universal joint, spindle, swivel ranges, horizontal, vertical, spindle, path, rotation angle, adjustable}

Description

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Title of the invention

Method and arrangement for guiding the blowpipe of a water lance blower

Field of application of the invention

The invention relates to a method and an arrangement for guiding the blowing tube of a water lance blower for cleaning a heating surface.

Characteristic of the known state of the art

For the purification of heat exchangers, it is known to connect the guide rod dee Waeserlanzenbläeere with moving elements so that the blow jet performs kreisformj'ihnllche movements on the surface to be cleaned · The moving elements of a drive with constant (DD-PS 147 407, 109 167 ) or controlled speed (DD-PS 145 476). However, both solutions can only be realized with considerable expenditure in order to achieve the desired effects. "

Furthermore, it is known to connect the guide rod of the blow pipe with guide elements so that the blow jet zig-zag? Sinusoidal or meandering band-like movements on the surface to be cleaned * The guide elements are subjected to a constant speed drive · These solutions have the disadvantage that at the deflection of the blowing jet high thermal stress on the surface to be cleaned occurs because the relative speed in the reversal points is much smaller than on the straights (SU-PS 468 079, 606 089, DD-PS 145475) _β to avoid this serious disadvantage, it is known to blow jet in rush points at the same speed or accelerated in the Reversing points to lead, so düss the increased thermal stress of the surface to be cleaned at the inverted lugs deleted · These solutions see template guides with driver chains (DD-PS 150 408) and chain driven Mitnehmerschienen (DD-PS 148 096) before ·

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It is also known that constant speeds can be achieved by way of chain-driven driving and reversing rails (DD-PS 148 097; 157 363). Although the desired effects can be achieved with these solutions, it has been found during testing that there is a high susceptibility to failure as a result of fastening Chains - rails, the jamming in the template, the re-tensioning of the chains and the lubrication and contamination of the chains is given.

A large blow area is achieved by two nozzles arranged at an angle and an angled blowpipe (DD-PS 226 061 - P 1046) To achieve a surface-dormant movement of the blowpipe a multiple guidance of Bj.asrohres is required · These are a horizontal spindle and two In addition, this arrangement requires in addition to a high material cost and a large enclosed space · Furthermore, a variation of the cleaning movements with horizontal and vertical pivoting ranges is not readily possible because extensive modifications and manipulations are required.

Another arrangement for guiding a water lance blower comprises a guide rod connected to the blowpipe, which is pivotally connected to a horizontally and vertically moving guide element. A meandering movement is achieved by vertically interacting spindles by articulating the guide element to a threaded bearing guided on the vertical spindle is and the Blasstrahl on a surface to be cleaned dee heat exchanger performs meander band-like movements and at the reversal points, the movements are controlled, the vertical spindle is guided at their ends in threaded bearings, which are arranged on horizontal driven spindles, and that the threaded bearing of a horizontal Spindle an adjustable stop for controlling Endlagenechalterpaaren for the operation of the drive of the horizontal spindle and a limit switch, the threaded bearing of the other horizontal spindle a Endlagenechalter un d the threaded spindle bearing of the vertical spindle has an adjustable stop for actuating the limit switches, such that the guide element performs an approximate semicircular reversing movement on the reversing parts (DD-PS 155 857).

This arrangement has, although they tested features in practice ': has a complicated anlag ^ ntechnieohen build on, bodarf considerable expenses for their O _a uerbetrieb and leaves no scope for adjustments to clean surfaces on «

Object of the invention

The aim of the invention is to achieve a large-scale cleaning with low system technology and large variation of the cleaning movements.

Understanding the nature of the invention

The invention has for its object to achieve a variable controllable leadership of the blowpipe ·

This is achieved in that, according to the invention, one of the pivoting regions of the blowing head is controlled by an adjustable path of the spindle and an adjustable rotation angle of the bending angle and the other of the pivoting regions of the blowing head is adjusted by an adjustable rotation angle of the bending angle.

For implementation, the guide is connected to the spindle nut via rotary pins and the end of the blower tube provided with a drive is arranged axially and radially movably in the guide or in the universal joint.

embodiment

In one embodiment, the invention is explained in more detail «The drawing shows:

Fig. 1: Structure of the water lance blower in principle; Fig. 2: the structural design of the Blasrohrführung; Fig. 3: Mechanism of Blaskopf- and Blasrohrführunq with the geometry of the blower produced

In the combustion chamber wall 14 with hatch of the frame 1 is prepared with wall box 2 for receiving the Wasserlsnzenbläsers (Fig · 1) · On the frame 1, the spindle 7 with its speed counter and drive 12 is centrally arranged horizontally on the frame 8 · The spindle 7 has the Blasrohrführung 13, which with the Orehzahlzählar 10 and the

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Drive 11 is coupled. Brennkammerseltig the wall box opens into the universal joint 3, in which the nozzle head 6 is rotatably mounted. The nozzle head 6 is coupled to the blower tube 4 which has a kink K and is held by the blowpipe guide 13. The blowpipe 4 has the hose connection 5, which is coupled to a water-carrying system.

The mode of action is the following:

Above the supply of blowing water, the blowpipe 4 will blow a jet of water across its nozzle head 6 across the combustion chamber to the opposite wall. The location to be blown on the opposite wall results from the position of Blasrohrführung 13 on the guide spindle 7 and the rotational angle position of the blowpipe 4 in the Blasrohrführung 13. Thus, when Feststehen the Blasrohrführung 13 on the spindle 7 and 360 ° rotation of the blower tube 4 around the longitudinal axis of the bearings 3, 13 because of the arrangement of a Kiuckes K in the lance of the blow jet on the opposite wall a circle run * But it can also on the opposite wall a meandering band-shaped blower be generated, characterized in that at a fixed angular position of the blow pipe, the Blasrohrführung 13 with the blowpipe 4 on the spindle 7 performs a horizontal movement and at the end of this horizontal movement a vertical feed is performed by a predetermined rotational movement of the blower tube 4 and then again a Horizontal movement of the spindle L _n and vertical feed between the individual horizontal blowing movements can be adjusted by controllable Drohwinkelstellungen the blowpipe. These movements are adjustable and preprogrammed by the speed counter 9 for the spindle path Li ₁ and for the vertical feed of the blower over the longitudinal rotational movement of the blow tube with the rotation angle C via the speed counter 10.

The blower pipe guide G2 is composed of the spindle nut with pivot pin 16 and blow pipe bearing 17 (FIG. 2). The blower pipe bearing 17 has the controllable drive 11 with the speed counter 10 and the drive pinion. 18 fixedly installed «The gear 19 is rotatably mounted on Blasrohrlager 17 and with grooves for the keyways 20,

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which are attached to the blowpipe 4, provided · The blowpipe 4 with the kink K is locally stored in the universal joint 61 «

The mode of action is the following:

The blower tube 4 is shown in the position Gl - K4 - 4 ^X and lies spatially in the plane XZ. In this case, the joint G ₂ is inclined according to the required guidance of the blower tube 4 to the plane XY · If the blowpipe 4 is pivoted with its kink K of the kinked position K ₄ in the plane Y - Z to the angle 90 °, the drive 11 goes with Orehzahlzähler 10 in operation, the pinion 18 drives the gear IS, which slowly turns the blowpipe 4 in Blasrohrlager 17 via its grooves and the feather keys 20. The kink K pivots about & C to the plane YZ and at the same time rotates about the pivot pin 16a the blowpipe bearing in the corresponding inclined position to the plane XY, while the joint G ₂ from its inclined position rises in the plane XY (see dash-dotted line illustration) · It is the longitudinal correction of the reduced distances Gl - G2 by displacement of the blower tube 4 with its feather keys 20 in Blasrohrlager 17 with Blasrohrzahnrad 19 allows in their grooves.

If now, within the plane YZ, the blower tube is to be pivoted over the angle "Ab", the guide spindle 7 is driven via the drive 12. The joint G2 slides over the Y-Bewe ^ ung the spindle nut 15 z, B. to the point l ^x , wherein according to the Blasrohrlage with the buckling Kj the Blasrohrlager 17 via the bolt performs a pivoting movement in the X - Y plane. The Y-movement of the joint G ₂ can be carried out in any rigid rotational position C of the blower tube when the spindle 7 is driven · The correction of the resulting, constantly changing * the inclination of the blowpipe 4 with the changing distance Gi - G ₂ is achieved via the mitge oblique position of the joint G2 in the Paßfederführung 20 of Blasrohrlagers 17 and its rotation about the pin 16. Thus, even without rotation of the spindle 7, but short-term operation of the drive 10 with each rotational movement change & C adjust the inclination and rotation of the joint G ₂ and · the Blasrohrlagers 17 the required Blasrohrführung with Paßfedergleitbereich 20.

E3, however, also fails to carry out the blower pipe guide in the blue tube bearing 17 without axial displacement and to realize the length compensation of the distance G ₁ -G ₂ via an axial displacement of the nozzle head or the blow tube 4 in the universal joint 3. In the combustion chamber wall W ₂ (FIG. _{3 a} ), the blower tube R is guided via the joint G ₁ and on the spindle S via the joint G ₂ . In this case, one about the longitudinal axis of the joints G ₁ ; G ₂ performed rotational movement C done »For the opposite wall W ₁ is a meandering band-shaped blowing figure with the blowing figure A shown schematically (Fig. 3c). Characteristic operating points 1 to 7 of the blower figure are indicated by blowpipe R with its blowpipe position (FIGS. 3a, 3b and 3d):

The operating point 1 on the wall W ₁ is reached via the Blasrohrstellung 1 ^M , wonn the kink K _{1 of} the blow pipe R is in the horizontal plane of the image. In this initial position pber the speed counter IO and 9 (Flg. 1) pre-programmed, the working movement begins. The speed counter 9 controls via the horizontal spindle movement the Blasrohrführung 13 (Fig, 1) or G ₂ (Fig. 2) at a fixed speed counter 10 and unchanged rotation angle C with the S _c hwenkwinkel b to the operating point 2 ^{H of} the spindle S (Fig. la, b, d), said form in this case the bend K ₂ with the joint G ₁ a S _e nkrechte with the opposite wall W.. In Figure Ic, the Blasweg 1-2 is executed. After the horizontal spindle travel L ₁ ^ _{2 has been} stopped (FIG. 3 b), the drive 12 is stopped via the speed counter 9 (FIG. 1),

Oetzt is about the Drehzählzähler 10 a small rotation with a rotational movement of the blower tube by the angle .DELTA.C generated via the drive 11, so that the kink K ₂ performs a small vertical displacement, whereby the blow jet on the opposite wall W _1, the horizontal path Δί _ν (Figure 3c).

Thereafter, the horizontal drive 12 is again in motion in the reverse Drohrichtung and promotes the Blaerohrführung G ₂ via a prescribed Spindelweg L ₁ to a new breakpoint at which a further rotation AC of the blow pipe with the kink K is executed.

In the blower shown here with the work surface A

(Fig. 3c) while the Blasweg is set so that the center line

M the bubble surface don Blasweg L. bounded in the horizontal direction ·

After the gradual processing of the vertical blower paths Δ Ly with the angles of rotation Δ C, the blowpipe R has reached in working points 3, 4 and 5, the lowest working plane with the bending position K ^ ^ g of the blower tube. The working positions 3 ^X - K ₃ - G ₁ and 5 ^X - K ₅ - G ₁ result in the maximum horizontal pivoting range L ^ the minimum working surface width 5-3 of the blowing surface A of the blow jet ·

At a to be processed maximum Blasfigurfläche the horizontal spindle movement will perform a maximum from the point 3 * to the point 5 ^M with the maximum swivel angle a (FIG · 3b) in this case · If then the vertical Vorechub continued above the rotational movement Δ C is the mirror image Mäanderbandförmige working surface A processed in symmetry to the center line M, whereby also the middle boundary by the vertical position of Blasrohrführwng C. -, K is set to the wall W. · After a rotational movement AC by 180 ° from operating point 1, the operating point 7 is reached · If the rotational movement continues up to 360 °, the surface area A to be processed in mirror image above the line 1-7 is brushed over.

The arrangement of a kink K in the blowpipe R is achieved) that a vertical blowing movement of the blowpipe R, as shown over the distance L., dash-dotted lines (Fig. 3a), is not necessary. This is replaced by the strong kink K with the execution of a rotational movement of this kink K about the longitudinal axis of the joints -G ₁ - G ₂ .

Due to the geometry of the movement of the blowing jet with respect to an opposite wall W., it is achieved that the geometrically determined blowing point 3 ^M (FIG. 3c) extends even further out of the blow-molding surface due to the extended blow-jet path to the wall W * in the corner points of the blow-figure A lies in the true operating point 3 (FIG. 1c). This results from the geometry of the working point determination on the wall surface W * via the points 3 ¹¹¹ - 3 ¹¹ - 3 ^IV (FIG. 3 a) or 3 ¹¹¹ - 3 ^V - 3 ^V * - 3 (FIG. 3 b).

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Thus, over the extended working range 3-5 instead of 3-5 of FIG. 3c, additional pivoting range L. with spindle travel and kinking angle K can be saved.

Above the preprogrammed, each rotation angle Δ C. associated horizontal paths A ^L ^ any blowing patterns can be processed with blowing surfaces A *

The following advantages are achieved:

1 «Two vertical spindles are saved,

2. The separate drives or the drive of both vertical spindles are saved.

3. Obstruction of the horizontal movement of the blowpipe or the guide with drive by vertical spindles and their drives is prevented, the enclosed space of the water lance blower is significantly reduced.

4. The universal joint 3 can be firmly connected to its nozzle head 6. A sliding movement of the nozzle head 6 in the universal joint 3 can be omitted, because in the Blasrohrführung 13 with their rotary motion safe guidance is possible and this part structurally enough space can take, because he is not limited by other disabilities, such as vertical spindles in its movement. For a robust heat-resistant design dec universal joint with nozzle head 6 is possible and a longer life of this vulnerable component achievable.

5. The performance of the water blower can be minimized by one-shot design significantly in blow jet output and pump performance.

6. A favorable flow design of the blowpipe without double nozzle is possible.

7. Saves manufacturing costs and installation costs «

8. Dust protection and maintenance is improved, the service life of the device is increased,

9. The unit can be used in different sizes on unit hatches.

Claims (6)

moss * claim 1. A method for guiding the blowpipe of a water lance blower for cleaning a heating surface, wherein a mounted in a universal joint blowing head and a spindle movably guided end of a bend angle having blow pipe with a horizontal and vertical pivoting range is controllably guided, characterized in that dor one of the swivel ranges of the blow head is controlled by an adjustable path of the spindle and an adjustable angle of rotation of the bending angle and the other of the swivel ranges of the blow head by an adjustable angle of rotation of the bending angle. 2. The method according to claim 1, characterized in that the pivoting ranges are controlled as subregions « 3 * Method according to claim 1 and 2, characterized in that on the one swivel range, an equally large other swivel range is controlled « 4. The method according to claim 1 to 3, characterized in that a predetermined path bzwo pivot range of the spindle is assigned to a set angle of rotation of the bending angle « 5 arrangement for guiding the blowpipe of a water lance blower for cleaning a heating surface, wherein a rotatable and stored blow head in a Kreuzgelenkt and a spindle nut on a spindle provided with a drive movably guided end of a bending angle having blowpipe is arranged in a guide, characterized in that the guide is connected via a pivot pin to the spindle nut and the E _n de of the blower tube provided with a drive in the guide or in the universal joint is arranged axially and radially movable « 6. Arrangement according to claim 5, gekannzeichnet in that dae end of the blow pipe connected via feather keys with a movable attached to the guide gear and is arranged on the guide of the drive provided with a pinion _c For this 3 pages drawing