JPH0112896Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an apparatus for removing slag from a weld between a tube and a fin of a membrane panel constituting the outer wall of a boiler, for example.

Configuration of conventional example and its problems For example, as shown in FIG. 1, the membrane panel constituting the outer wall of a boiler has fins 2 made of flat steel arranged between a plurality of tubes 1 made of steel pipes, etc. These are manufactured by welding and fixing them together using automatic welding equipment. This welding is performed from one end of the tube 1 to the other end, and after welding, the surface of the welded portion 3 is covered with slag 4, as shown in FIG.

Conventionally, the above-mentioned slag 4 has been manually scraped off and collected by a worker using a chisel or the like. However, the slag 4 adhering to the welding start end is hardened and difficult to peel off, resulting in a problem that conventional manual work is very inefficient.

Purpose of the Invention It is an object of the present invention to provide a slag removal device that eliminates the above-mentioned conventional drawbacks.

Structure of the Invention In order to achieve the above object, the slag removal device of the present invention includes a plurality of tubes arranged in parallel at appropriate intervals, and a plurality of tubes arranged between the tubes, and both side edges of the tubes are arranged in parallel. A conveying device is provided for conveying a membrane panel consisting of fins welded to the tube along the longitudinal direction of the tube,
A moving frame is provided above the membrane panel and supported by a fixed body so as to be movable in the membrane panel conveying direction, and a fixed cylinder supports the moving frame disposed on the fixed body along the membrane panel conveying direction with a predetermined force. , and the movable frame is provided with an elevating body that is supported by a copying cylinder and can be raised and lowered, and the elevating body is supported so as to be movable in a horizontal direction perpendicular to the conveying direction of the membrane panel, and the tip thereof is A peeling blade applied to the weld between the tube and the fin is provided, and the movement of the moving frame toward the lower side in the membrane panel transport direction, which occurs when an abnormal load is applied to the peeling blade, is detected, and the above-mentioned copying cylinder is It is equipped with a limit switch that operates to raise the elevating body.

Embodiment and operation Hereinafter, an embodiment of the present invention will be described based on FIGS. 3 to 5. A is a scraping part for scraping off the slag 4 of the membrane panel 5, B is an automatic welding part provided upstream of the scraping part A, and C is an auxiliary drive part provided downstream of the scraping part A. . Reference numerals 6 to 10 are U-groove rollers for transporting membrane panels disposed in each part A to C, of which roller 7 is a main driving roller, and rollers 9 and 10 are auxiliary driving rollers. Reference numeral 11 denotes a fixed guide bar disposed above the scraping part A along the conveying direction A of the membrane panel 5, and 12 is a movable frame, which is a frame main body 12A.
, a horizontal arm 12B extending from the upper end of the frame body 12A in the direction of arrow A;
An inclined beam 12C that connects the tip of B and the center of the frame body 12A, and a boss portion 12 that is fixed to the upper end of the frame body 12A and the tip of the horizontal arm 12B, respectively, and that is slidably fitted onto the fixed guide bar 11.
It is composed of D. 13 is the frame body 12 mentioned above.
A vertical guide bar 14 is arranged on both sides of the frame main body 12A so as to be movable up and down, and a boss portion 14A fixed to both sides is fitted onto the vertical guide bar 13 so as to be movable up and down. frame, 15
is a pressure roller rotatably disposed on the lower surface of the elevating frame 14, and is located above the main drive roller 7. 16 has a frame body 12A
A pressure cylinder 18 is connected to a bracket at the upper end by a pin and a piston rod tip is connected to the upper end of the lifting frame 14, and 18 is a scraping device,
It consists of the following: i.e. 19,2
0 is a horizontal frame and a pair of horizontal arms extending horizontally from the center of the back of the frame main body 12A, 21 is a main body of the horizontal frame 1
9 is a copying cylinder whose piston rod 21A extends below the horizontal frame 19; 22 is a lower limit setting stopper which is fixed to the upper end of the piston rod 21A; 23 is an elevating body whose top center is fixed to the lower end of the piston rod 21A; Reference numeral 24 denotes a rectangular guide rod which is erected at both ends of the upper surface of the elevating body 23 and is inserted into a through hole at the tip of each horizontal arm 20 so as to be able to rise and fall freely; 25 is rotatably disposed on the lower surface of the elevating body 23. It is a copying roller and is located above the U-groove roller 8. 26 is the elevating body 2
3, a reference frame 27 is a first vertical screw rod screwed into a nut 28 fixed to the upper plate of the reference frame 26, and 29 is disposed within the reference frame 26 so as to be movable up and down. At the same time, the center of the top surface is the first vertical threaded rod 2.
A central elevator frame connected to the lower end of 7, 30, 31,
Reference numeral 32 denotes first and second horizontal threaded rods and horizontal guide rods arranged in the front and rear chambers of the central lifting frame 29 along the directions of arrows B and C; First and second peeling blades are arranged in the side chamber and the rear chamber, and the central screw holes thereof are screwed into the first and second horizontal screw rods 30 and 31, respectively, and the upper and lower parts are penetrated. A hole slidably fits over a horizontal guide rod 32. Reference numeral 35 indicates a pair of guide rails fixed to both sides of the back surface of the elevating body 23, and reference numeral 36 indicates an arrow B within each guide rail 35.
a slider inserted so as to be slidable in the C direction, 37;
Reference numeral 38 indicates an operating threaded rod which is screwed into a screw hole of each slider 36 and whose both ends are rotatably supported by the elevating body 23; 39 is a sliding frame fixed to each slider 36; and 40, 41 are each sliding member. Second and third vertical threaded rods 43 and 44, which are screwed into nuts 42 fixed to the upper plate portion of the frame 39, are disposed within each sliding frame 39 so as to be able to move up and down, and the center of the upper surface is connected to the second, third, and third vertical threaded rods. The side lift frames 45, 46, 47, 48, 49 connected to the lower ends of the third vertical threaded rods 40, 41 respectively are connected to the front and rear chambers of the side lift frames 43, 44 by the arrows B,
The third to sixth horizontal threaded rods and horizontal guide rods 50 to 53 are arranged along the C direction, and the third to sixth horizontal guide rods 50 to 53 are arranged in the front and rear chambers of each side lifting frame 43, 44, respectively. It is a sixth peeling blade, and its central threaded hole is threadedly engaged with the third to sixth horizontal threaded rods 45 to 48, respectively, and its upper and lower through holes are externally fitted into the horizontal guide rod 49. Next, the auxiliary drive section C will be explained. 54 is each U groove roller 9, 10
It is an elevating slider that is supported by a machine frame 55 above the machine frame 55 so as to be able to rise and fall freely, and a presser roller 56 is rotatably disposed on the lower surface of the slider. 57 is a presser cylinder whose main body is connected by a pin to the machine frame 55 and whose piston rod tip is connected by a pin to each of the elevating sliders 54, and 58 is a dust collector disposed between the scraping part A and the auxiliary drive part C. At that suction port 5
8A is close to the fin 2 of the membrane panel 5. Reference numeral 60 denotes a fixed cylinder whose main body is connected to a fixed body and whose piston rod tip is pin-connected to a bracket of the movable frame 12. During slag removal, the piston rod is held in an extended state as shown in FIG. There is. 61 in Figure 6
is the 4-port 2-position first switch for fixed cylinder 60.
A switching valve 62 is a 4-port 2-position second switching valve for switching the copying cylinder 21, 63 is an air pump, 64 is a relief valve, 65 is a limit switch fixed to a fixed body, and 66 is a movable frame opposite to the limit switch 65. 12, and this striker 66 is a limit switch 65.
When this occurs, the limit switch 65 is turned on, and the second switching valve 62 is switched to the position shown in FIG.

Hereinafter, the effects of the above configuration will be explained. First, the first switching valve 61 is set to the position, the piston rod of the fixed cylinder 60 is extended, and then the membrane panel 5 immediately after welding is conveyed in the direction of arrow A by the U-groove roller 6 in the automatic welding area, and its tip is driven by the main drive. onto roller 7 and U-groove roller 8. Next, the pressure cylinder 16 is operated to press the pressure roller 15 against the tube 1. Next, the first and second horizontal threaded rods 30 and 31 are suitably rotated in the forward and reverse directions so that the first and second peeling blades 33 and 34 are opposed to the welded portion 3, respectively. Further, each operating threaded rod 37, 38 is appropriately rotated in the forward and reverse directions so that each sliding frame 39 faces a predetermined fin 2. Next, the third to sixth horizontal screw rods 4
The third to sixth peeling blades 50 to 53 are respectively opposed to the welding part 3 by appropriately rotating the peeling blades 5 to 48 forward and backward.
Next, the piston rod 21A of the copying cylinder 21 is lowered to bring the copying roller 25 into contact with the tube 1. As a result, each peeling blade 33, 34, 50~
53 is inserted between tubes 1. Next, the first to third vertical threaded rods 27, 40, and 41 are screwed in, respectively, and the peeling blades 33, 34, and 50 to 53 are pushed into the slag 4 to a predetermined depth. Next, the main drive roller 7 is rotated in the direction of arrow D, and the membrane panel 5 is conveyed in the direction of arrow A. As a result, each peeling blade 3
3, 34, 50-53, the slag 4 is continuously peeled off. The peeled slag 4 is sucked into the dust collector 58 from the suction port 58A. Next, when the tip of the membrane panel 5 is brought onto the auxiliary drive rollers 9 and 10 of the auxiliary drive unit C, the presser cylinder 57 presses the presser roller 56 against the tube 1 via the elevating slider 54, and the auxiliary drive roller 9 and 10 in the direction of arrow D and pull out the membrane panel 5 in the direction of arrow A. During slag removal, each peeling blade 33, 3
4. Abnormal load on 50-53 ≪For example, peeling blade 3
3, 34, 50 to 53, hard slag, etc.>, the fixed cylinder 6
0 is contracted, the striker 66 hits the limit switch 65, and the detection signal from the limit switch 65 causes the second switching valve 62 to close.
is switched to the position, the piston rod of the copying cylinder 21 is reduced, and each peeling blade 33, 3
4,50-53 are raised. Therefore, each peeling blade 33, 34, 50-53 due to abnormal load.
cannot be damaged. A timer (not shown) is activated by the detection signal of the limit switch 66, and when the timer expires after an appropriate set time from several seconds to several minutes, the output signal at the time of expiration causes the second switching valve 62 to operate. is switched to the position, and each of the peeling blades 33, 34, 50 to 53 descends to return to the state of removing the slag 4 again. At this time, the piston rod of the fixed cylinder 60 is also extended. Incidentally, the portions of slag that could not be removed may be removed later by a worker.

In the above embodiment, the case of the tube 1 having a relatively large diameter has been described as an example, but the present invention can also be applied to a tube 1 having a relatively small diameter, as shown by the imaginary line in FIG. In this case, roll 6
~10 shall be replaced accordingly.

Effects of the invention As described above, according to the invention, slag can be continuously and efficiently removed by the peeling blade simply by applying the peeling blade to the welded part and then transporting the membrane panel using the conveying device. It is something that can be done.

In addition, even if an abnormal load is applied to the stripping blade due to biting of the stripping blade, hard slag, or positioning error of the stripping blade, the limit switch can detect it and separate the stripping blade from the weld.
Damage to the peeling blade and membrane panel can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a membrane panel, and FIG. 2 is a cross-sectional view of the same panel. 3 to 6 show one embodiment of the present invention, FIG. 3 is a side view, FIG. 4 is a partially cutaway side view of the main part, FIG. 5 is a rear view of the main part, and FIG. Figure 6 is an air circuit diagram. 1...Tube, 2...Fin, 3...Welded part, 4...Slag, 5...Membrane panel, 7
... Main drive roller (transport device), 11 ... Fixed guide bar, 12 ... Moving frame, 18 ... Scraping device,
21... Copying cylinder, 23... Elevating body, 29...
...Central lifting frame, 33...First peeling blade, 34...Second peeling blade, 39...Sliding frame, 50-53...Third
~Sixth peeling blade, 58...dust collector, 60...fixed cylinder, 65...limit switch, 66...
Striker.

Claims (1)

[Scope of utility model registration request] A membrane panel consisting of a plurality of tubes arranged in parallel at appropriate intervals and fins arranged between the tubes and having both side edges welded to the tubes is attached along the longitudinal direction of the tubes. a transport device for transporting the membrane panel, a moving frame supported by a fixed body so as to be movable in the membrane panel transport direction above the membrane panel; A fixed cylinder is provided to support the membrane panel with a predetermined force, and an elevating body supported by a copying cylinder and movable up and down is provided on the movable frame, and the elevating body is movable along a horizontal direction perpendicular to the transport direction of the membrane panel. A peeling blade is supported by the tube and the fin and its tip is applied to the welded part between the tube and the fin, and the movement of the moving frame toward the lower side in the membrane panel transport direction that occurs when an abnormal load is applied to the peeling blade. 1. A slag removal device comprising a limit switch that detects the following and operates the copying cylinder to raise the elevating body.