JPH0446327B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a slide-type soot blower.

A conventional soot blower type soot blower is shown in Figures 1 and 2.
In the soot blower of the soot blower type, the injection medium is opened and closed by the valve 14, and the injection medium is ejected from the nozzle provided at the tip of the lance tube 12 via the supply pipe 13. The lance pipe 12 connects the power source 1 to the gear box A.
→ Power is transmitted through gear box B, causing rotation and moving across the entire width of the heat exchanger, etc. The driving of the lance tube 12 will be explained in detail with reference to FIG. 2. First, to explain the movement of the lance tube 12, the power from the power source 1 is transferred to the gears 2, 3, 4, 5, sprocket 6, chain 7, sprocket 8, 9, chain 10.
The signal is transmitted to the gear box B through the gear box B, and the gear box B is moved in the axial direction. The lance tube 12 is connected to the gear box B and moves together between a retracted position and an extended position.

Next, to explain the rotation of the lance tube 12, the power of the power source 1 is transferred to the gears 2, 3, 15, 16 and the operating gear 1
9, 20, 21 sprockets 22 chains 23 sprockets 24, 25 chains 27 sprockets 24 are transmitted to the lance tube 12 via gears 31, 32 to rotate the lance tube 12. Note 11,2
6, 28, and 30 are idler sprockets.
One-way clutches 17, 18 are built into the operating gears 19, 20 of the rotary drive mechanism. Since the lance tube 12 is extended and then retracted, it is always rotated in one direction by the one-way clutches 17 and 18 even if the power source operates in the reverse direction. Note that the reason why the lance tubes 12 are rotated in the same direction is to change the injection position of the nozzle.

The soot blowing device shown in FIGS. 1 and 2 has the drawbacks of a large number of parts, a complicated structure, and high cost.

The present invention is intended to eliminate the above-mentioned drawbacks, and a gear box equipped with a power source is fixed to the lance tube, and within the gear box, a rotating shaft that is rotated forward and backward from the power source through the gears is connected to the lance tube. A pinion supported orthogonally and attached to the end of the rotating shaft meshes with a rack placed parallel to the lance tube, allowing the lance tube and gear box to reciprocate in the axial direction of the lance tube. A large bevel gear is fixed to the lance tube, a small bevel gear meshes with the large bevel gear, and the gear has a built-in one-way clutch that transmits power only in directions in which rotation of the rotating shaft differs from each other. The soot is transmitted to each of the small bevel gears through the soot, and is configured such that when one of the small bevel gears is transmitting power, the other small bevel gear idles. The purpose of the blowing device is to reduce costs. Not only can the distance of movement from the retracted position to the extended position be increased, but if it becomes necessary to clean a special area within the same movement range, the power source can be repeatedly turned forward and reverse once the nozzle reaches that area. An object of the present invention is to provide an improved soot blowing device which can clean only that part.

Next, the soot blowing device of the present invention is shown in FIGS. 3 to 6.
To explain with one embodiment shown in the figure, in this slide-type soot blower, the injection medium supply port is opened and closed by the valve 41, and the injection medium is supplied to the lance pipe 43 through the supply pipe 42. It is injected from a plurality of nozzles 44. The supply pipe 42 is the gear box A
The inside of the lance tube 43 is inserted into the lance tube 43.
It extends for almost the entire length of. The lance tube 43 rotates and moves in the axial direction at the same time in order to remove deposits adhering to the outer or inner surface of the heat exchanger, etc., and protrudes into or is pulled out of the heat exchanger, etc. do. The rotation and axial movement of the lance tube 43 are performed from a power source 51 via the gear box A, and the power source 51, the gear box A, and the lance tube 43 are integrally connected. The above-described main soot blower will be explained in detail with reference to FIG. 4. First, lance tube 4
The axial movement mechanism of No. 3 will be explained. The axial movement of the lance tube 43 is achieved by the power of the power source 51 being driven by the gears 52 and 5.
The power is transmitted to the pinion 45 and the rack 46 through the three worm gears 54 and 55 and the shaft 61, and the power source 51 connected to the gear box A and the lance tube 43 move together in the axial direction. Next, the rotation mechanism of the lance tube 43 will be explained. First, the case where the lance tube 43 moves toward the thrusting side along the axial direction will be described. Power from the power source 51 is transmitted to the shaft 61 via gears 52 and 53 and worm gears 54 and 55. The shaft 61 has a gear 56a with a built-in one-way clutch 60a and a gear 56b with a built-in one-way clutch 60b.
When the lance tube 43 rotates toward the pushing side, the shaft 61
The one-way clutch 60a meshes with the one-way clutch 60a, and the rotation of the lance tube 43 is controlled by the gears 56a, 57a, bevel gear 58a,
59, the lance tube 43 rotates in the direction of arrow X. At this time, the other one-way clutch 60b
is disengaged from the shaft 61, and the gear 56
b, 57b The bevel gear 58b follows the rotation of the bevel gear 59 and idles. Next, a description will be given of a case where the lance tube 43 moves toward the drawing side along the axial direction. At this time, the power source 51 rotates in the opposite direction, and the shaft 61 rotates toward the drawing side of the lance tube 43. Then, the axis 61
The one-way clutch 60b meshes with the one-way clutch 60b, and the rotation of the lance tube 43 is controlled by the gears 56b, 57b, bevel gear 58b,
59, the lance tube 43 rotates in the direction of arrow X.

The power source 51 is reversed, the shaft 61 is reversely rotated,
When the lance tube 43 changes from the pushing side to the pulling side, the engaged one-way clutch 60a
1, and the gears 56a, 57
The a bevel gear 58a follows the bevel gear 59 and idles.

The slide-out type soot blower of the present invention is constructed as described above, and the lance tube 43 is moved in the axial direction and rotated at the same time by one power source 51 and one gear box A. Moreover, the lance tube 43 is used as the power source 5.
Since it rotates in one direction (X direction) regardless of the rotation direction of the gear, only one gear box is required compared to the conventional two, reducing the number of parts, simplifying the structure, and reducing costs. . Furthermore, the moving distance from the retracted position to the protruded position (see L in FIG. 5) can be increased. Moreover, if it becomes necessary to clean a special part (see l in Figure 6) within the axial movement range, the power source can be repeatedly rotated forward and reverse once the nozzle reaches that part. This has the effect of allowing you to clean only specific areas.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

Figure 1 is a side view showing a conventional soot blower type soot blower;
Fig. 2 is a perspective view thereof, Fig. 3 is a side view showing an embodiment of the slide-type soot blower according to the present invention, Fig. 4 is a perspective view thereof, and Fig. 5 is the axial movement distance of the lance tube. FIG. 6 is an explanatory diagram showing a partial movement state of the lance tube. A... Gear box, 43... Lance tube, 45... Pinion, 46... Rack, 51... Power source, 56
a, 56b...Gear, 58a, 58b...Small bevel gear, 59...Large bevel gear, 60a, 60b...One-way clutch, 61... Rotating shaft.

Claims (1)

[Claims] 1 A gear box equipped with a power source is fixed to a lance tube, and a rotating shaft that is rotated forward and backward from the power source via gears is supported within the gear box so as to be orthogonal to the lance tube, and the rotating shaft is A pinion attached to the end meshes with a rack arranged parallel to the lance tube, so that the lance tube and the gear box can reciprocate in the axial direction of the lance tube, and a large bevel gear is attached to the lance tube. The small bevel gears mesh with the same large bevel gear in between, and the rotation of the rotating shaft is transmitted to each of the small bevel gears via a gear equipped with a one-way clutch that transmits power only in different directions. 1. A soot blower of a drop-out type soot blower, characterized in that when one of the small bevel gears is transmitting power, the other small bevel gear idles.