JPS605247A - Nozzle passage structure of lance - Google Patents

Abstract

PURPOSE:To provide the titled passage structure wherein the interior structure of a nozzle part is simplified, constituted of such a structure that a common manifold is provided to three pipes in the nozzle having a burner provided to the leading end thereof and three passages provided to this manifold is connected to the jet orifice of the burner. CONSTITUTION:In the nozzle passage structure of a lance, a first-third pipes (a powder pipe leading end part P, an O2-pipe leading end part O and oil pipe leading end par L) and a manifold 55 common to each pipe are provided in a nozzle 13 having a burner 67 provided to the leading end thereof. In this case, a first pipe is connected to the first distribution passage (pipe 61) in the manifold 55 through a first header 54 and a second pipe is connected to the second distribution passage 62 in the manifold 55 through a second header 51 surrounding the first header 54 while a third pipe is connected to the third passage 59 in the manifold 55 and the above mentioned three pipes are connected to the jet orifice of the burner 67. That is, because the header 54 is contained in the header 51, the total exclusive space the headers occupy can be reduced and the nozzle part 13 can be miniaturized and simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a furnace repair pressure lance used in a furnace at a high temperature of, for example, 15006 C, and particularly to a passage structure for providing various passages in a nozzle at the tip of the lance.

Generally, a plurality of passages are provided in this type of nozzle, such as a passage for thermal spray powder (for example, refractory brick powder), a passage for fuel, and a passage for oxygen. Further, these passages are branched within the nozzle and connected to a burner at the tip of the nozzle. Therefore, conventional products have the disadvantage that the passage structure within the nozzle is complicated and the nozzle is large.

In order to solve the above-mentioned drawbacks, the present invention improves the header, manifold, etc. in the nozzle, and the following disadvantages are explained with reference to the drawings.

In FIG. 1, which is a partially cutaway side view, the lance 1 includes an outer tube 2, an inner tube 3, and an inner tube! It has a triple tube structure with 4 and 5 and 5 and 5 and 6, and is held in a horizontally extending position by pinch rollers 5 and 6 at a plurality of locations from above and below. The pinch 0-ra 5.6 is for moving the lance l in the direction of the arrow F, and is attached to a lifting platform (not shown).By moving the lifting table, the entire lance l can be raised and lowered. It is supposed to be done.

Also, as shown in FIG. 2, which is a schematic cross-sectional view taken along line II-II in FIG.
Each pinch 0-ra 5.6 is equipped with an annular m7 at the small diameter center of the outer circumferential surface of the drum Jg, and one m7 is provided on the outer circumferential surface of the outer g2.
A rod-shaped stopper 9 that fits in is fixed by spot welding. The stopper 9 is for preventing rotation of the lance 1 itself and holding the nozzle part 13 at the front end (the left end in FIG. 1) in a downward position, for example. These square bars are formed parallel to and on the same straight line with the center A-A of the lance l, separated by a cut 1o.

Cooling water passages @Wl and W2 are formed between the outer tube 2 and the middle tube 3 and between the middle w3 and the inner tube 4, respectively. Each aisle W
l 1W2 has partition plates 11 and 12 made of spiral rods.
is provided so that the cooling water flows in a spiral shape within the passages W1 and W2. Both passages Wl and W2 are connected in the nozzle part 13 at the front end as described later, and the whole forms a reciprocating passage, and the outer passage W1 is a return passage (return passage), and the inner passage W2 is connected. is the outbound route.

A cooling water outlet Wa is provided at the rear end 2' of the outer w2, and
A joint flange at the front end of the exit vibe WA is bolted to a flange 13 surrounding the exit Wa.

The pipe WA extends rearward (to the right in FIG. 1), and a drainage pipe hose (not shown) is connected to the rear end. The rear ends 3' and 4' of the middle pipe 3 and the inner pipe 4 protrude rearward from the rear end 2' of the outer pipe, and the middle rear end 3' has a cooling water inlet wb surrounding it. A flange 14 is provided.

The flange 14 has a joint straw at the front end of the cooling water-filled vibe WB. 7ji is bolted. The pipe WB also extends to the rear, and the rear end becomes a flexible hose for water supply (as shown)? A continues.

The rear end portion 2' of the outer tube is provided with a thick-walled cylindrical crand 15 at the rear of the flange 13, and the middle w3 is also provided with a thick-walled crand 16 inside the crand 15. both tarando 15
．． A plurality of clamp pins 17 are provided between the clamp pins 160. The ballast 17 is pushed from the rear by a cylindrical ballast holder 19, and its front end is in pressure contact with an annular step provided on the inner periphery of the front end of the clank 15. The Paraten presser 19 has a 20ft outward flange at its rear end, and the flange 2o is bolted to the rear end surface of the clamp 15.

In the inner w4, utility pipes, that is, a powder pipe P for transferring the furnace wall repair material powder, a fuel pipe L and an oxygen pipe 0 are passed parallel to the center A-A, and these pipes L, 0°P is supported by a plurality of disc-shaped pipe supports 21 provided within the inner pipe 4. The support 21 is, for example, the front, middle, and rear three parts of the inner 1iF4.
Holes are provided at positions perpendicular to the center A-A, into which pipes L, 0, and P fit, respectively. Two adjacent supports 21 are connected to each other by a plurality of bar-shaped spacers (not shown) parallel to the center, and the rear support 21 is connected to the rear support at the rear end of the cylinder by similar spacers. It is connected to the flange 24.

The flange 24 has holes into which the pipes L, 0, and P fit, and is slightly fixed by a bolt 25 together with a support seat 23 to the annular flange 22 fixed to the rear end of the inner pipe 3 and inner gJ4. There is. The support seat 23 is a member that extends in an annular shape surrounding the pipes L10 and P, and has a structure that can be split into two. 26 has pipes L, 0,
P and the cooling water pipe WA1WB are fixed with U bolts 27. Pipes L, 0, P support 26
The rearwardly protruding ends of the hoses are respectively connected to flexible hoses (not shown) that supply utilities (oil, oxygen, powder).

The above-mentioned w2.3.4 is the stopper 9) is also slightly expanded in a tapered shape at the front part, and the pipe 2.3.4 has a cylindrical flange 30 at the tip of the front part. It is fixed. As shown in Figure 3, which is an enlarged partial view of Figure 1,
An annular flange 32 at the rear end of the nozzle portion 13 is fastened to the front end of the flange 30 with a plurality of bolts 33. The nozzle part 13 is, for example, an abbreviated outer part 12 bent downward in two steps.
a.

The middle pipe 3a and the inner pipe 4a are provided together, and the flange 32
are fixed to the rear ends of these blades 2a, 3a, and 4a. Cooling water passages W3 and W4 are formed between the outer pipe 92a and the middle pipe 3a and between the middle pipe 13a and the inner pipe W4a.Although not shown, each of the passages W3 and W4 is a pair bent in two stages. There are two semi-circular cross-section passages in the partition plate.
It is divided equally. The flanges 30 and 32 are provided with holes 35 and 36 that connect the outer cooling water passages W11W3 and holes 37 and 38 that connect the inner cooling water passages W2 and W4. Third
As shown in Figure 4, which is a schematic cross-sectional view of ■-ff in the figure, hole a5.3
6 and holes 37 and 38 are provided over the entire circumference of the flanges 30 and 320, respectively, except for the bolts 33 and their vicinity. 3. As shown in FIG. 6, the outer peripheral surface of the flange 3o is provided with an annular ring f440 for attaching and detaching the bolt 33 from the rear. The seal linter 41 is cylindrical and includes an O-link 42 on the outer periphery of the rear end of the flange 3o and an O-linter 43 on the outer periphery of the flange 32.
It is fixed to the flange 30 by a bolt (not shown). In addition, the flange 30,
An O linter 45 is installed between the inner circumferential portions of 32.

A support 46 made of an assembly of plate materials is attached to the inner peripheral surface of the inner frame 4a at a position adjacent to the flange 32. As shown in FIG. 5, which is a partial v-v cross-sectional view of FIG.
It is provided with a hole through which the tip end L' passes. As shown in FIG. 3, the tip portions L', 0', and P/ are connected to the pipe L through the joints 47, 48, and 49 at the rear ends within the flange 30 or near the rear thereof.
,0. It is detachably connected to the P body.

Inside the nozzle portion 13 (wda), there is provided an oxygen distribution cane 51 forming an oxygen distribution chamber 5°, and in the distribution chamber 50, a powder distribution ivy 54 is provided. The front end of the oxygen pipe tip 0' is fixed to the heter 51.
The oxygen passage in ' communicates with the distribution chamber 50. The powder pipe tip P' penetrates the wall surface of the helter 51 and is fixed to the lower end of the helter 54, and the powder passage inside the tip P' is connected to the powder distribution chamber 53 in the helage 54. is connected to. The lower ends of both hinges 51 and 54 are fixed to the upper end of an oil manifold 55. The manifold 55 has a ring shape on the outer periphery, YI! The lower end of the oil pipe tip L' is fixed to the upper end of the outer periphery of the manifold 55, and the oil passage in the tip L' is connected to the groove 56 through the hole in the manifold 55. Connected. #56 is closed by a seal pipe 57 attached to the outer periphery of the manifold 55, and is connected to a downward opening 660 in the center of the manifold 55 via a radial passage 59 inside the manifold 55. There is. The manifold 55 includes a hole into which the powder vibro 1 fits, and an oxygen passage hole 62.

The vibro 1 extends parallel to the nozzle center N--N, and its top and end communicate with the outer periphery of the powder distribution chamber 53. hole 62
The upper end is parallel to the nozzle center N-N, and the upper end is 54
It communicates with the oxygen distribution chamber 50 at its radially outer portion. As shown in FIG. 6, which is a partial cross-sectional view taken along the line 1--2 in FIG.

As shown in FIG.
A boss 65 is formed that surrounds 0 and protrudes downward.
Further, the upper end of a seal pie-j66 is fixed to the outer periphery of the lower end. A burner 67 with a circular cross section is provided on the lower side of the manifold 55. With the burner 67 in contact with the lower end of the boss 65 and the pipe 66, the burner 67 is attached to an annular flange 69 fixed to the outer periphery of the lower end of the pipe 66. bolt 6
8 is fixed. A chamber 70 having an annular cross section is formed between the pi' 566 and the boss 65, and the lower end of the oxygen passage hole 62 communicates with the chamber 70. The powder pie 6
1 passes through the chamber 7o and fits into the hole of the burner 67.
The lower end of the vibro 1 is open to the lower surface of the burner 67. The burner 67 is provided with a large number of oxygen nozzle holes 71 and oil nozzle holes 72 on the outside and inside of the vibro 1 arranged in an annular shape, respectively. As shown in FIG. 7, which is a sectional view taken along line 1 in FIG. The upper end communicates with the chamber 7o, and the upper end of the hole 72 communicates with the hole 60.

At multiple locations on the outer periphery of the burner 67 are bolts 75 attached from below, and 0 links 90 are attached to the lower surface of the annular flange 76.
has been fixed through. Flange 76 is 3ffi t
They are fixed to the lower ends of 12a13a, 4a, and are provided with passages M79.80 inside which connect the cooling water passages w3, w4 and the cooling water chamber 7'7 in the burner 67. 7th
As shown in the figure, the chambers 77 are formed between adjacent bolts 75 and are arranged in an annular shape. Furthermore, the third
As shown in the figure, the 0 link 90 includes the bolt 75 and the chamber 77.
It is provided on the outer periphery side. Also, an O-link 91 is provided at a portion of the burner 67 that fits into the inner peripheral surface of the flange 76. A plaque 81 is attached to the lower part of the through hole of the bolt 75 provided in the burner 67.

Explain the operation. In FIG. 1, the oil, oxygen, and powder supplied to the pipes L10 and P pass through the passage in the nozzle section 13 and are ejected from the burner 67, and the powder is sprayed onto the inner surface of the furnace wall along with the flame. In addition, the cooling water supplied from the inlet vibrator WB flows into the chamber 77 through passages W2 and W4, is reversed in the chamber 77, flows into the passage W3, and is discharged from the passage W3 through Wl to the outlet vibrator WA. Ru.

In this manner, the cooling water flows along the entire circumference of the lance 1 in both the outward path (flow toward the burner 67 side) and the return path, so that the entire lance 1 is sufficiently cooled.

Furthermore, in the passages Wl and W2, the cooling water flows spirally along the partition plates 11 and 12, so that the lance 1 is cooled uniformly over its entire circumference.

During thermal spraying work, the outer w2 is hotter than the middle pipe 3.
Due to the difference in thermal expansion, the outer tube w2 expands more than the middle tube 3, but in that case, the clamp band 17 fixed to the rear end 2' of the outer tube Since it slides on the outer tube 2 and the inner opening 3, no stress or strain is generated in the outer tube 2 or the inner opening 3 due to the difference in the amount of elongation.

Also, there is a difference in the amount of thermal expansion between the outer tube 2 and the stopper 9, but since the stopper 9 has a cut 1o and each stopper 9 is short, there is no possibility that large stress or distortion will occur in the outer tube 2 and the stopper 9. do not have.

Next, the replacement work of the nozzle part 13 will be explained. Nozzle part 13
is a type of consumable item and needs to be replaced periodically.
3 and remove the fixing bolt 68 of the burner 67 in Figure 3.
After removing the nozzle part 13 to the front, attach a new nozzle part 13 in the reverse order to complete the process.

Also, for the entire lance 1, use the rear end as the tip. - In this case, the cooling water pipe W at the rear end
Remove A and WB from the flange 13.14, and remove the flange 23 along with the support 26 backwards, and in this state insert the lance 1 between the D-lars 5.6.

As explained above, according to the present invention, there is a burner 6 at the tip.
The first, second and third pipes (powder pipe tip Pζ oxygen pipe tip 0
', oil pipe tip L') and a common manifold l'55 for each pipe, and the first pipe (for example, p/)
to the first in the manifold 55 via the tube 54.
Connect to the distribution passage (vibro 1), and connect the second pipe (for example, Q/) to the second distribution passage (hole 62) in the manifold 55 via the second tube 51 surrounding the first tube 54. A third vial (for example, L/) is connected to a third passage 59 in the manifold 55, and each passage is connected to an injection hole of a burner 67. As described above, in the present invention, since the @1 heter 54 is housed within the second heter 51, the space occupied by the entire heter can be reduced, and the nozzle portion 13 can be made smaller. Also header 51
．． By arranging the nozzle portions 54 in a double layer, it is possible to connect both the tubes 51 and 54 to a common manifold 55 without adopting a complicated piping structure, which simplifies the internal structure of the nozzle portion 13.・I can do things.

[Brief explanation of drawings]

Figure 1 is a partially cutaway side view, Figure 2 is a schematic cross-sectional view taken along the line ■-■ in Figure 1, Figure 3 is an enlarged partial view of Figure 1, Figures 4, 5, 6, and Figure 7 is II'-■, v- of Figure 3, respectively.
v, vr-vr, ■-■ sectional partial view. 13...
・Nozzle part, 51...2nd to 154...1st
Hey! R-155... Manifold, 59... Third passage, 61... Pipe (first distribution passage), 62...
- Hole ('2nd distribution passage), 67...Burner, L',
0', P'... Pipe tip patent applicant Nippon Steel Corporation (1 other person) Figure 6 Figure 7

Claims (1)

[Claims] A common manifold is provided for the first, second, @3 pipes and each pipe in the nozzle with a burner at the tip, and the first pipe is connected to the first distribution passage in the manifold via the pipe. connecting the second pipe to a second distribution passage in the manifold via a second jitter surrounding the first pipe; and connecting the third pipe to a third passage in the manifold;
A nozzle passage structure of a lance, characterized in that each of the above passages is connected to an injection hole of a burner.