JPS604784A - Heat-resistant lance - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat-resistant lance for furnace repair pressure, which is used in a furnace at a high temperature of about 15006C, for example.

Generally, the furnace repair pressure lance is equipped with a burner and is designed to spray powder such as fire bricks onto the furnace wall surface P from a nostle at the convex end. However, if a 3i tube structure is adopted for such a lance, and cooling water passages are formed between the outer tube and the middle tube and between the middle tube and the inner tube, the difference in thermal expansion will be This causes stress and strain on the outer tube and inner tube.

In order to solve the above-mentioned incongruence, the present invention provides a seal between the ends of the outer tube and the middle tube of Miehiko so that the inner tube can be expanded and contracted relatively. It is designed to prevent the generation of stress and strain due to differences in expansion and contraction, and is explained as follows using the drawings.

In Fig. 81, which is a partially cutaway side m1 drawing, lance 1
A triple-pipe tube consisting of a fat outer "fC2, a middle tube 3, and an inner tube 4" is pinched from above and below by pinch rollers 5. The 0-hinch D-Ra 5.6 is used to move the lance 1 in the direction of arrow F, and can be attached to a lifting platform (not shown) to allow the lifting platform to be moved. This allows the entire lance l to move up and down.

In addition, as shown in FIG. 2, which is a schematic cross-sectional view taken along line 11-I of the seedling 11, each pinch roller 5.6 is provided with an annular 247 at the center of the small diameter of the outer circumferential surface of the outer circumferential surface. 1 on the other hand
The rod-shaped stopper 9 that fits into the slot 1 is fixed (by dot welding). The stopper 9 prevents the rotation of the lance 1 and stops the nozzle portion 13 at the front end (left end in Fig. 1).
For example, it is used to hold the lance in a downward position, and as shown in Fig. 1, it is formed by a plurality of square bars. q on the same straight line
They are lined up with 10 J rows apart.

Cooling water passages W1 and W2 are formed between the outer tooth 2 and the middle pipe 3 and between the middle pipe 3 and the inner w4, respectively. Each aisle W
Partition plates 11 and 12 each consisting of a set of spiral rods are provided in the passages W1 and W2 so that the cooling water flows in a spiral manner within the passages W1 and W2. As will be described later, both passages W1 and W2 are connected in the nozzle hole portion 13 at the front end to form a reciprocating passage as a whole, and the outer passage W1 is a return passage (return passage). The passage W2 is the outgoing passage.

A cooling water outlet WB is provided at the rear end 2' of the outer W2.
A mysterious flange at the end of the exit vibe wA is bolted to the flange 13 surrounding the exit Wa.

The pipe WA extends rearward (to the right in FIG. 1), and a drain hose (not shown) is connected to the rear end of the pipe WA. The rear end parts 3' and 4' of the middle pipe 3 and the inner pipe 4 also protrude rearward than the rear end part 2' of the outer pipe. A surrounding flange 14 is provided.

A joint flange at the front end of the cooling water inlet pipe WB is bolted to the flange 14. The pipe WB also extends to the rear, and the rear end is a flexible hose for water supply (as shown)
is connected to.

The flattened rear end 2' is provided with a thick-walled cylindrical crand 15 at the rear side of the flange 13, and the middle w3 is also provided with a thick-walled shingle 16 inside the crand 15. Ryojirant 1
5.16, there are a plurality of tarandhans 17 provided. The ballast 17 is pressed from behind by the cylindrical snap presser 19, and the front IM! J is in pressure contact with an annular stepped portion provided on the inner periphery of the front end portion of the tarasito sheet 15. The band holder 19 has an outward flange 20 at the rear end 7 IS, and the flange 2o is bolted to the rear end surface of the clamp 15.

Inside information 4 is a utility pipe, that is, furnace wall 1Y.
A powder vibrator P for transferring the powder, a fuel pipe ``jL'' and an acid purple pipe 0 are passed parallel to the center A-A, and these pies ``jL1o1P are installed in the flesh 4. It is supported by a plurality of disc-shaped bira sabots 1-21. The supports 21 are provided at three locations, for example, the nσ portion, the middle portion, and the stepped portion of the inner bay 4, in a configuration perpendicular to the center A-A, and each has a hole into which the pi'jL10 and P fit. The 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 glue holes 1 and 21 are connected to the rear end of the sill system 1 by similar spacers. is connected to the rear support flange 24 of.

The flange 24 has holes into which the pipes L and O1P are fitted, and is fixed to the annular flange 22 fixed to the rear end of the Nakazuke 3 and the inner I version 4 by the port 25 together with the seat 23. has been done. Sahot seat 23 is pipe L10, P
It has a structure that can be divided into two by a member that extends in an annular shape surrounding the boat (S
5L, 0, P and the cooling water pi j WA, WB
is u]1 (fixed to the bolt 27. Pipe L, 0
, P are connected at their rearwardly protruding ends to respective fuel hoses (not shown) for supplying utilities (oil, acid serum, powder).

The above-mentioned tube 2.3.4 has a stopper 9 on one side and widens in a slightly tapered shape. Franc=:I3
0 is fixed. As shown in FIG. 3, which is an enlarged partial view of FIG. 13 is, for example, a curved shape bent downward in two steps, and Et in i'J3a1 in rB 2 a1.
By setting GQ 4a accordingly, the flange 32 is fixed to the rear end of these parts 2a13a%4a. Outside U
Between za and middle W3a and middle/sae3a and inner t'f 4
Cooling water passages W3 and W4 are formed between A and A.Although not shown, each of the 3JJl passages W3 and W4 is formed into two semicircular arc cross-sectional passages by a pair of partition plates each bent at 2y. It is divided into two equal parts. The flange 30.32 is provided with a hole 35.36 connecting the outer cooling water passages w1 and w3 and a hole 37.38 connecting the inner cooling water passage w2 and w4. ■-1~ in Figure 3! As shown in FIG. 4, which is a schematic cross-sectional view, the holes 35, 36 and the tags 37, 38 are provided around the entire circumference of the flange 30132, except for the port 33 and its vicinity. @3 Franc = ;30 as shown in the figure
An annular ring 40 is provided on the outer circumferential surface of the hole 33 for attaching and removing the bolt 33 from the rear.
The seal link 41 is cylindrical and is connected to the 0 link 42 on the outer circumference of the rear end of the flange 30 and the flange 3.
It fits into the O-link 43 on the outer periphery of the flange 2, and is fixed to the lower flange 30 by a quilt (not shown). Note that there is a zero space between the inner circumferences of flanges 30 and
A ring 45 is attached.

A support 46 made of an assembly of plate materials is attached to the inner circumferential surface of the inner tube 4a at a position 1) 14 in contact with the flange 32. As shown in FIG. 5, which is a partial view of the Y-V cross section in FIG.
A hole is provided through which the tip end L' of jL passes. As shown in Fig. 3, the tips L', 0', and P' are removably connected to the main body of the pipe L and O1P via joints 47, 48, and 49 at the rear end within the flange 30 or near the rear thereof. .

In the inner tube 4a of the nozzle portion 13, an oxygen distribution canister 51 is provided to form an oxygen distribution chamber 5°, and in the distribution chamber 50, a powder distribution canister 54 is provided. The front end of the oxygen pipe tip O' is fixed to the heter 51.
The zero ligature passage in ' is in communication with the distribution chamber 50. The powder pipe tip P' penetrates the wall surface of the heater 51 and is fixed to the lower end of the heater 54, and the powder passage inside the tip P' distributes the powder inside the heater 54. It communicates with room 53.

The lower ends of the piers 51 and 54 on both sides are oil manifolds 55
is fixed at the top of the The manifold 55 is a disk-shaped part U having an annular +'fg56 on the outer periphery, and 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 in the tip part L' of the oil pipe L' is fixed to the upper end of the outer periphery of the manifold 55. Each passage is read into groove 56 through a hole in manifold 55. 7r+156 is closed by a seal pipe "j57" attached to the outer circumference of the manifold 55, and is connected to the downward opening hole 60 in the center of the manifold 55 via a radial passage 59 in the manifold 55. The manifold 55 includes a hole into which the powder vibro 1 fits, and a zero-total passage hole 62.

The vibro 1 extends 29 parallel to the nozzle center N-N, and its upper end communicates with the outer periphery of the powder distribution chamber 53. Hole 62 is also parallel to nozzle center N--N, and its upper end communicates with oxygen distribution chamber 50 at the radially outer portion of header 54 . No. 6I21, which is a partial cross-sectional view of No. 37 vl-v1
As shown, a large number of vials 61 and holes 62 are provided on the same circumference, and the Ijfl passages 59 are provided radially.

As shown in FIG. 3, there is a hole 6 in the center of the lower end of the manifold 55.
A boss 65 that surrounds 0 and sends it downward is formed and 2shi,
Further, the upper end of the seal pipe b6 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 ends of the reed, boss 65, and nozzle 66, the burner 67 is attached to an annular flange 69 fixed to the outer periphery of the lower end of the pipe 66. A burner 67 is fixed to i1' by a bolt 6B. Pi''j66 and boss 6
A chamber 70 having an annular cross section is formed between the holes 5 and 5, and the lower end of the acid cable passage hole 62 communicates with the chamber 70. The powder vibro 1 passes through the chamber 70 and fits into the hole of the burner 67, and the lower end of the vibro 1 opens below the burner 67. The burner 67 is a vibro 1 arranged in an annular manner.
There are many 1'J outside and inside of it! 2 system poor hole 7
1 and an oil drain hole 72. As shown in FIG. 7, which is a Vll-Vll cross-sectional view of FIG.
The upper end of the hole 71 is connected to the chamber 70, and the upper end of the hole 72 is connected to the chamber 70, as shown in FIG.

A plurality of locations on the outer periphery of the burner 67 are fixed from below to the lower surface of the halves of the rough flange 6 by the flange 7b and the lower surface of the halves 6. The flange 76 has three layers. , 4a is fixed to the top end 9, and there are also passages 79 and 80 inside which connect the cooling water passages W3 and W4 and the cooling water chamber 77 in the burner 67.As shown in FIG. The chain 12 members 77 are formed in the same way as the bolts 75 that are in instant contact, and are arranged in a U-shape as a whole.As shown in FIG.
It is provided on the outside) 78 side of the 5J-chi 1 humper 77. Also, a 17 tab 91 is provided at a portion of the burner 67 that fits into the inner circumferential surface of the flange 76. Below the 100 holes of the 7 bolts 75 provided in the burner 67, there is a plaque 81.
is not installed properly.

Explain the operation. In Fig. 1, there are 3r, 1o,
The oil, oxygen, and powder supplied to P are the last 11. Part 13
The powder is ejected from the C burner 67 passing through the passage in the furnace wall along with the flame. 8 shots. The cold power 1 water supplied from Matairi Rono\izu WB Katame flows into the chamber 77 through the passages W2 and W4, reverses at the chi 1 humper 77, flows into the passage W3, and flows through the passages W371+A and Wl. The cooling water flows along the entire circumference of the lance 1 in both the outward path (flow to the burner 6711!11) and the return path, so the entire lance 1 is exposed to the light beam. cooled down.

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, the outer tube 2 reaches a higher temperature than the middle tube 3, and due to the difference in the amount of thermal expansion, the outer tube 2 expands more than the middle tube 3J. Since the tarant patch 17 fixed to the rear end 2' of the outer tube 13 slides on the gilant 16 of the middle tube 3, stress and distortion due to the difference in the amount of expansion will not occur in the outer tube 2 or the inner tube 3 (・.

Also, there is a difference in the amount of thermal expansion between the sheet image 2 and the stopper 9,
The stopper 9 has a cut 10 (However, since the solid stopper 9 is short, there is no stress or distortion on the outer tube 2 and the stopper 9.)

Next, replace the nozzle part 13; step 11). Nose 71 / Part 13 +t -, + Heavy 71:4 Since it is a worn item, it needs to be replaced periodically.Replacement 1' After removing the fixing bolt 68 of the burner 67 shown in the figure and removing the nozzle part 13 forward, the new nozzle part 13 is installed with the opposite hand to complete the process.

Also, the entire lance l can be installed between 0 and 6 with the rear end as the tip, but in that case, the cooling water pipe W at the rear end
Remove A 1■ from the flanges 13 and 14, and remove the flange 23 (1) along with the boat 26) to the rear, and in this state insert the lance l between the D-lars 5116.

As explained above, according to the present invention, the evening tube 2, the middle tube 3
, this utility pipe L, 0.0. Cooling water passages W1 and W2 are provided between the outer pipe 2 and the middle pipe 3 and between the middle pipe 3 and the inner pipe 4, which communicate with each other at -A (chamber 77), through which the outer pipe 2 and the middle pipe P pass. Seals 17 are provided at mutually adjacent ends 2, 3' of the tube 3 to allow relative expansion and contraction of the outer tube 2 with respect to the inner tube 3. Therefore, the lance 1 can be sufficiently cooled, and stress and distortion can be prevented from occurring in the outer tube 2 and the inner tube 3 due to differences in thermal expansion.

[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 IV-ff and v- of @Figure 3, respectively.
It is a partial cross-sectional view taken along v1■-vt and ■-■. l... Lance, 2... Outer tube, 3... Middle tube, 4... lm' [J
, l 7 = - Seal, Llo, P... Utility pipe, Wl, W2... Cooling water passage Patent applicant Nippon Steel Corporation・-q51:' r, ) Figure 6 Figure 7

Claims (1)

[Claims] A utility pipe is passed through the inner pipe of a triple pipe comprising an outer pipe, a middle pipe, and an inner pipe, and a cooling water passage that communicates with each other at one end is provided between the outer pipe and the middle pipe and between the middle pipe and the inner pipe. A heat-resistant drain, characterized in that seals are provided at mutually adjacent ends of the outer tube and the middle tube to allow relative expansion and contraction of the outer tube with respect to the middle tube.