JPS604783A - Cooling structure of 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 cooling structure for a heat-resistant lance for furnace correction used in a high temperature furnace of about 15000C, for example.

Generally, a furnace repair pressure lance is designed to spray powder such as refractory brick onto the inner surface of the furnace wall from a nostle at the tip equipped with a burner, and has a cooling water passage inside. However, with the conventional product, the lance was not sufficiently cooled.
However, there is a problem that the degree of cooling becomes uneven.

In order to solve the above problems, the present invention has three heat-resistant arms.
A cooling water passage with one end communicating with each other is provided between the outer pipe and the middle pipe with a double pipe structure, and between the outer pipe and the middle pipe, and a cooling water passage is provided between the outer pipe and the middle pipe. A spiral passage is formed by providing a hole, and the passage is explained as follows according to the drawing.

In FIG. 1, which is a partially cutaway side view, the lance 1 has a triple tube structure including an outer tube 2, a middle tube 3, and an inner tube 4. 5.6
0 pinch roller held between upper and lower swords 5.6
is for moving the lance 1 in the direction of arrow F, and is attached to a lifting platform (not shown).By moving the lifting platform, the entire sill system 1 can be moved up and down.・Ru.

Further, as shown in FIG. 2, which is a schematic cross-sectional view taken along line U-11 in FIG. One side is 7g7
A rod-shaped stopper 9 that fits is fixed by spot welding. The stopper 9 is for preventing the rotation of the lance 1 itself and for arranging the notch part 13 at the front end (the left end in Fig. 1) in a downward position, for example, so as to prevent the rotation of the lance 1 itself. I'm ashamed to say that these square rods are lance 1.
are lined up parallel to and on the same straight line with the center A-A of

Cooling water passages W1 and W2 are formed between the inner pipe 2 and the inner pipe 3, and between the inner pipe 3 and the inner pipe 4, respectively. Each passage W1, W2 has a partition plate 11 made of a spiral rod set.
12 is provided so that the cooling water flows in a spiral shape within the passages W1 and W2. As will be described later, both passages W1 and W2 are connected to each other in the nozzle part 13 at the front end to form a reciprocating passage as a whole, and the outer passage Wl becomes a return passage (return passage), and the inner passage The passage W2 is the outbound passage.

A cooling water outlet Wa is provided at the rear end 2' of the outer tube 2.
t of the front end of the vibe WA that comes out from the flange 13 surrounding the outlet Wa
The VK hand flusher is bolted on.

The pipe ``JWA'' extends rearward (to the right in Figure 1), and a drain hose (not shown) is connected to the rear end.The installed ends of the middle pipe 3 and inner pipe 4 The parts 3' and 4' are also manufactured rearward from the rear end part 2' of the outer pipe, and the rear end part 3' of the middle pipe is provided with a cooling water population wb and a flange 14 surrounding it. 2 langes 14 have a cooling water inlet by 11 at the front end of the WB.
ej hand flange is bolted. pipe WBL
j1. It extends to α10,000, and its rear end connects to a flexible hose (not shown) for water supply.

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 (I), and the middle tube 3 is also provided with a thick-walled crand 16 inside the shim 15. both clans 1
A plurality of clamp pads 17 are provided between 5.16 and 5.16. The rose (+-) 17 is pushed from behind by a cylindrical para-thin presser 19, and its front end is pressed against an annular step provided on the circumference of the front end of the clamp 15. Band presser 19
has an outward flange 2o at its rear end, and the flange 2o is bolted to the rear end surface of the clamp 15.

Inside the inner pipe 4, a utility pipe, including a powder pipe P for transferring powder for repairing the furnace wall, a fuel pipe ``jL'' and an oxygen pipe 0 are passed parallel to the center A-A. Pi'jL and O1P are supported by a plurality of disc-shaped pipe supports 21 provided in the inner pipe 4P. are provided at right angles to the center A-A), and each has a hole into which the pi'jL, 0, 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 support 21 is connected to the support 21 by similar spacers. The rear support flange 24 is connected to the rear support flange 24.

The flange 24 has holes into which the pipes L and O1P fit, and is screwed together with the bolt 25 with the υ indicator seat 23 against the annular flange 22 attached to the rear end of the middle pipe 3 and the inner pipe 4 at L11. It is fixed (・ru. The support seat 23 is a pi
It has a structure that can be divided into two with a member that extends in an annular shape surrounding P (2V), and a frame-shaped support 2 made of Anjil manufactured towards the rear.
The front end of the support 26 is supported by the pipe L.
, O1P and "0 number cooling water pipe" WA, WB are u]
1 [Identification according to route 27. The pipes 0 and P are connected to flexible hoses (not shown) that supply utilities (oil, oxygen, powder), respectively, at the rearwardly protruding ends of the support 26.

The above-mentioned tube 2.3.4 is widened in a slightly tapered shape at the front part of the stopper 9, and at the tip of the tapered part, the tube 2.3.4 has a cylindrical shape. A flange 30 is fixed to the front end of the flange 30, as shown in FIG. 3, which is an enlarged partial view of FIG. It is fastened. For example, the nostle part 13 has an abbreviated outer tube 2a bent downward in two steps, a middle tube 3a, and an inner tube 4a.
The flanges 32 are fixed to the rear ends of these tubes 2''138N4a. Cooling water passages W3 are provided between the outer tube 2a and the middle tube 3a and between the middle tube 3a and the inner tube 4a.
When W4 is formed, each mMW is not shown.
3 and W4 are equally divided into two passages each having a semicircular arc cross section by a pair of partition plates each bent in two stages. The flan 30132 is provided with holes 35.36 that connect the outer cooling water passages Wl and W3 and holes 37.38 that connect the inner cooling water passages W2 and W4. As shown in Figure 4, which is a schematic 1% I cross-sectional view of Figure 3, holes 35.36 and 37.3
8 are provided over the entire circumference of the flap 30 and 32, except for the port 33 and its vicinity. As shown in FIG. 3, the outer peripheral surface of the flange 30 is provided with an annular groove 40 for attaching and detaching the port 33 from the rear. Groove 40 is hole 3
5 is connected in an annular manner and is closed from the radial direction by a seal link 41. Seal link 41
is cylindrical and has an O-link 42 on the outer periphery of the rear end of the flange 30.
It fits into the O-link 43 on the outer periphery of the flange 32, and is fixed to the shift flange 30 with bolts (not shown). An O-lead 45 is attached between the peripheral parts.

A support 46 made of a plate material is attached to the inner peripheral surface of the circular tube 4a at a position parallel to the flange 32. As shown in FIG. 5, which is a partial cross-sectional view taken along the line ■-■ in FIG. A hole is provided through which the concave part and the tip L' of the oil-by-piece L pass through.As shown in FIG. Via Mysterious Hand 47, 48, 49, Baizu Ll-0, P has a 1 concubine reading that can be attached and detached to the main body.

) In the inner tube 4a of the depletion part 13, an oxygen distribution pipe 51 is provided to form an oxygen distribution chamber 50.
A pipe 54 is provided for distributing the powder inside. The front end of the oxygen passage tip 0' is defined by a hemper 51, and the oxygen passage within the tip 0' communicates with the distribution chamber 50. The powder pipe tip P' passes through the wall surface of the header 51 and its lower end is fixed to the header 54, and the powder passage inside the tip P' is connected to the powder distribution chamber in the header 54. Please contact 53.
Ru. 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 disk-shaped surface having an annular scrap 56 on the outer periphery, and the lower end of the oil pipe tip L' is fixed to the upper end of the outer circumference of the manifold 55, and the oil passage inside the tip L' is connected to the manifold 55. It connects to the groove 56 through the hole. The groove 56 is closed by a sealing pipe 57 attached to the outer periphery of the manifold 55, and is CA-connected to the downward opening hole 60 in the center of the manifold 55 via a radial passage 59 in the manifold 55. are doing. The manifold 55 has a hole into which the powder pipe "j61" is fitted and an oxygen passage hole 62.
Ru.

Vibro 1 extends parallel to the hole center N - N,
The upper end communicates with the outer periphery of the powder distribution chamber 53.
2) is parallel to the depletion center N-fi, and its upper end is connected to the oxygen distribution chamber 50 at d-minutes radially outside of the helter 54.
is connected to. As shown in FIG. 6, which is a partial cross-sectional view taken along the line Vl--Vl in FIG. 3, a large number of vibrators 1 and holes 62 are provided on the same circumference, and the passages 59 are provided radially.

As shown in FIG.
An 11 square 65 is formed that surrounds 0 and extends downward, and L
-p, and the upper end of the seal pipe 66 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. ;)” While touching, bye 6
The burner 6 is attached to an annular flange 69 fixed to the outer periphery of the lower end of the burner 6.
7 is il [Ruto 68! I'm so stubborn (・ru.

A chamber 7 east having an annular cross section is formed between the bi'j 66 and the +i and s 65, and the acid group and the lower end of the U path hole 62 communicate with the chamber 70. 61 passes through the chamber 70 and fits into the hole of the burner 67, and the lower end of the pipe 61 is opened at the lower surface of the burner 67. Each has a large number of oxygen nozzle holes 71 and oil nozzle holes 72.
Ru. As shown in FIG. 7, which is a cross-sectional view taken along line Vll-Vll in FIG. The upper end of the p1 hole 71 communicates with the chamber 7o, and the upper end of the hole 72 communicates with the hole 60.

Multiple angles θ on the outer periphery of the burner 67 are connected to the device 71 from below. Ruto 75 Yoichi! It is fixed to the lower surface of the 111R-shaped flag reflex 6 via an O-link 90. Fran =;
76 C3M pipes 2a13a, l'4a17) Fixed to the lower end, the circular part has a passage 7 connecting the cooling water passages W3, W4 and the cooling water pipe 77 in the burner 67.
9.80. Chisenbar 7 as shown in Figure 7
7 is formed between bolts 75 that are in instant contact, and the entire structure is arranged in an annular shape. In addition, as shown in Figure 3, O-link 9
0 is provided on the outer peripheral side of the bolt 75 and the front cover 77. Also, an O-link 91 is provided at the burner 67 portion that fits with the inner peripheral surface of the flan =:/76. burner 67
A plaque 81 is attached to the lower part of the through hole of the bolt 75 provided in the hole.

Explain the operation. As shown in FIG. 1, the oil, acid serum, and powder supplied to the OIP are ejected from the burner 67 through the passage shown in the opening σ in the depletion part 13, and the powder is ignited by the flame. On the same side as the furnace V; Also entrance vibe WB
The cooling water supplied from 71P flows through passages W2 and W4 into the center bar 77, is reversed at the channel 77, flows into the passage W3, creates a passage W3 and flows through Wl, and is discharged to the outlet pipe WA. I can do it. In this way, 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 the entire lance 1 is sufficiently cooled.

In the writing passages Wl and W2, the cooling water flows spirally along the partition plate 11112, so that the lance 1 is cooled uniformly over its entire circumference.

During thermal spraying work, the outer tube 2 is hotter than the middle g3.
Due to the difference in the amount of thermal expansion, the outer tube 2 expands more than the middle tube 3, but in that case, the tarasitopara cowl 17 fixed to the rear end 2' of the vulva extends more than the gyrant 16 of the middle tube 3. Since it slides on the top, there is no stress on the outer tube 2 or the middle tube 3 due to differences in the amount of expansion.

Also, there is a difference in the amount of thermal expansion between the outer tube 2 and the stopper 9, but the stopper 9 has a cut 10/v1ii, and the solid stopper 9 is short. No distortion or distortion occurs.

Next) the replacement work of the depletion portion 13 will be explained. Depletion part 13
is a type of consumable item, so it must be replaced regularly.Y+4;
J) The replacement work involves shifting the seal link 41, removing the bolt 33, removing the fixing bolt 68 of the burner 67 in Fig. 3, and removing the nozzle part 13 forward. The installation is completed by attaching the part 13 in the reverse order.

Also, the entire lance 1 is installed between the D-Lar 5.6 with the rear end as the tip, but in that case, the cooling water pipe W at the rear end
Remove A and ■ from the flanges 13.14, and remove the flang ;23 along with the support 26 to the rear, and in this state insert the lance 1 between the D-lars 5.6.

As explained above, according to the present invention, the outer tube 2, the middle tube 3,
Pass the utility pipe "jL, O1P into the inner pipe 4 of the triple pipe equipped with the inner pipe 4, and connect it between the outer pipe 2 and the middle pipe 3 and between the middle pipe 3.
Cooling water reciprocating passages W1 and W2 that communicate with each other at one end (chisen bar 77) are provided between
, Since the partition plate 11 is provided in the cooling water passage W1 between at least the outer pipe 2 and the middle pipe 3 in W2 to form a spiral passage, the cooling water can sufficiently and evenly cover the entire cooling water passage 1 as described above. Can be cooled.

Note that the inner partition plate 12 of the spiral partition plates 11 and 12 can also be eliminated.

[Brief explanation of the drawing]

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 shows II'-If and v in Figure 3, respectively.
-v, vi-vi, ■-■ sectional partial views. 1...
・Lance, 2...outer tube, 3...middle tube, 42.inner tube,
11112...Partition, L, OlP...Utility pipe, Wl, W2...Cooling water passage Patent applicant
Nippon Steel Corporation (and 1 other person) Agent Patent Attorney Dai
Tadaka Mori / □ 1shi j Figure 4 Figure 6 Figure 7

Claims (1)

[Claims] A cooling water passageway in which 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 the outer pipe and the middle pipe and the middle pipe and the inner pipe communicate with each other at one end. and a partition is provided in at least the cooling water passage between the outer pipe and the middle pipe to form a spiral passage. .