JPS604785A - Nozzle connecting structure of 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 furnace repair pressure lance used in a high temperature furnace of, for example, 1500''C. This is aimed at those who are notifying the public.

Generally this kind of lance 1. li destination + 4i&'s lack power 1
A saw was installed to spray powder of bricks, etc. onto the inner surface of the furnace wall, and cooling water passages were installed inside.

And Lance and Nos 11. +Yo, Il of the above! However, according to the conventional product, insufficient cooling force occurs at the connecting flange between the lance and [i+], and when the flange becomes overheated, equal strain S occurs in each part. (・9
There is one problem.

The present invention solves the above problems by improving the structure of the connecting flange between the lance and the nozzle.

In FIG. 1, which is a partially cutaway side view, the lance l has a triple-pipe structure comprising an outer tube 2, a middle tube W3, and an inner tube 4, and extends horizontally with pimps D at multiple locations. -La 5.6
The zero pinch rollers 5.6, which are held from above and below, are used to move the lance 1 in the direction of arrow F, and are attached to a lifting platform (not shown) to move the lifting platform a.
The entire syllance l can be raised and lowered by raising and lowering it.

Also No.] 1. As shown in FIG. 2, which shows the 11-■ cross section 11 of J, each Hishichi roller 5.6 is provided with an annular 47 at the small diameter center of the drum-shaped outer circumferential surface. The Ni strapper 9, to which the rod-shaped L collar 9 that fits into one groove 7 is fixed by spot welding, prevents the lance 1 itself from rotating and allows the nozzle portion 13 at the front end (left end in Fig. 1) to be fixed. For example, it is for composing poetry in a downward position, and as shown in Figure 1, it is made up of multiple square rods, and these square rods are parallel to and on the same straight line as the center A-A of lance 1. Cut to 10
are lined up separated by

Cooling water passages MW1 and W2 are formed between the outer tube 2 and the middle tube 3 and between the middle tube 3 and the inner tube 4, respectively. Each passage Wl, W2 has a partition plate 11 made of a spiral rod.
．． 12 is provided so that the cooling water flows in a spiral shape inside the cooling water body passages W1 and W2.
, W2 are connected within the front end (as described later) 2 JL/part 1 part 3 and the whole forms a reciprocating passage, and the outer passage W1 is the return passage (return passage), and the inner passage Passage W2
is the outbound route.

A cooling water outlet Wa is provided at the rear end 2' of the outer tube 2.
A joint flange of the outlet pipe WA is bolted to a flap 13 surrounding the outlet Wa.

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

A joint flange at the front end of the cooling water input lobby 5WB is bolted to the flange 14. The pipe WB also extends rearward, and its rear end is connected to a water supply flexible hose (not shown).

The rear end portion 2' of the outer tube is provided with a thick-walled cylindrical crand 15 at a portion k rearward from the flange 13, and the middle tube 3 is also provided with a thick-walled crand 16 inside the crand 15. both clans 15
．． A plurality of batons 17 are provided between the belts 16. The band 17 is pressed from behind by a cylindrical band presser 19, and its front f'1ll is in pressure contact with an annular step provided on the inner periphery of the front end of the clamp 15. The para-flat presser foot 19 is provided with an outward flange 20 at its rear end, and the flange 2o is bolted to the rear end surface of the clamp 15.

Inside the inner pipe 4, there are utility pipes, that is, a powder pipe P for transferring Furakabeura Shugetsu powder, a fuel pipe L, and a zero accumulation pipe 0 passing in parallel to the center A-A. The pipe L101P is supported by a plurality of disc-shaped pipe supports 21 provided in the circular table 4. For example, the holes 1<-21 are provided at three locations at the front, middle, and rear of the inner tube 4 in a shape perpendicular to the center A-A, and have holes into which the pipes ``jL10'' and ``P'' fit, respectively. The two adjacent sabots 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 same spacers 9. ) The rear end of the lance 1 is connected to the flange 24.

The flange 24 has holes into which the pipes L and O1P fit, and the bolts 25 are attached to the annular flange 22 fixed to the rear end of the middle pipe 3 and the inner shell 4 together with the seat 23.
It is fixed in place. Support seat 23 is pipe L10
, A frame-shaped support 2 made of Antal that protrudes rearward and has a structure that can be split into two by a member that extends in an annular shape surrounding P.
Supports the front end of 6 (on the support 26) (Eve L, O1P and the cooling water piping -> WA, WB
is fixed to u iB Lucito 7. Pi-5L,
0. P is connected to a flexible hose (not shown) for supplying utilities (oil, purple, powder) at the ends protruding rearward from the support 26, respectively.

The above-mentioned tube 2.3.4 is slightly tapered and widened at the mouth a side of the stopper 9, and the tube 2.3.4 has a cylindrical body at the tip of the mouth part a. A flange 30 is fixed. As shown in FIG. 3, which is an enlarged partial view of FIG. 1, an annular flange 32 at the rear end of the nozzle cap 13 is fastened to the front end of the flange 30 by a plurality of four holes 33.

The nozzle portion 13 has, for example, an abbreviated outer W2a, a middle pond 3a, and an inner tube 4a bent downward in two stages in the same window, and the flange 32 is fixed to the rear end of these tubes 4a. Even if it happens. Between the outer w2a and the middle pipe 3a and the middle pipe 3
Cooling water passages w3 and w4 are formed between a and the inner pipe 4a.Although not shown, each passage w3 and w4 is formed by a pair of partition plates bent in two stages and 92 semicircles. It is divided into two equal passages with an arcuate cross section. The flange 30.32 has a hole 35.36 connecting the outer cooling water passage w3.
Holes 37 and 38 are provided to connect the inner cooling water passages w2 and w4. As shown in FIG. 4, which is a schematic cross-sectional view taken along the line ■-y in FIG.
It is provided in a circular pattern around the entire circumference of the flaps 30 and 32, except for 3 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 bolt 33 from the rear. The groove 40 connects the entire hole 35 in an annular manner.
・Even if it is pushed by the seal pipe 41 from the outside in the radial direction. The seal pipe 41 is cylindrical and has a flange 3.
The O-ridge 42 on the outer periphery of the rear end of the flange 32 fits into the O-link 43 on the outer periphery of the flange 32, and is fixed to the shuffler 30 by bolts (not shown).

Between the inner circumference of 2J flange 30 and 32 is 09 nge 4.
5 is installed.

A support 46 made of an assembly of plate materials is attached to the inner peripheral surface of the inner tube 4a at a position adjacent to the flange 32. As shown in FIG. 5, which is a partial cross-sectional view taken along line v-V in FIG.
It has four arcuate parts into which the pipes ' and 0' fit, and a hole through which the tip L' of the oil pipe L passes. As shown in FIG. 3, the tip portions L', o', and P' are connected to the pipe L10 through joints 47, 48, and 49 at the rear ends within or near the rear of the flange 30.
It is detachably connected to the P body.

In the inner pipe 4a of the oxygen depletion section 13, a tube 5'l is provided for acid distribution forming an oxygen distribution chamber 5°, and in the distribution chamber 50, a tube 54 is provided for powder distribution. . The front end of the oxygen bypasser tip O' is fixed to the spatula at 1-51, and the acid system passage within the tip O' 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' distributes the powder inside the helter 54. It communicates with room 53 (・
Ru. The lower ends of both headers 5'l and 54 are fixed to the upper part of the oil manifold 55). The lower end 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 of the manifold 55.The groove 56 is attached to the outer periphery of the manifold 55. The manifold 55 is closed by a seal pipe 57 and connected to a downward opening 660 at the center of the manifold 55 through a radial passage 59 in the manifold 55. '1 fits into the hole and the oxygen passage hole 62
It is equipped with

Noib 61 extends parallel to Noburu center N-N,
The upper end communicates 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. A large number of tubes 61 and holes 62 are provided on the same circumference, and the passages 59 are provided radially.

As shown in FIG.
A boss 65 is formed that surrounds 0 and extends downward.
Further, the upper end of the seal pipe 66 is fixed to the outer peripheral portion of the lower end. ? A burner 67 with a circular cross section is provided on the lower side of the second hole 55, and a bar 67 is in contact with the lower ends of the boss 65 and piping 66. Burner 67 is attached to flange 69 with bolt 6
8 is fixed. A chamber 70 having an annular cross section is formed between the pipe 66 and the boss 65, and the lower end of the oxygen passage hole 62 communicates with the chamber 70. The powder pipe 61 passes through the chamber 70 and is transmitted to the hole of the burner 67, and the lower end of the powder pipe 61 is opened to the surface of the burner 67.
There is. The burner (57 is provided with a large number of oxygen through holes 71 and an oil exhaust hole 72 on the outer wall 1 and inside of the burner 57 arranged in an annular manner). 914 in FIG. 7, which is a sectional view taken along the line ■-■ in FIG.
The upper end of the hole 71 is the chamber 70.
The upper end of the hole 72 communicates with the hole 60.

O-links 90 are attached to the lower surface of the annular flange 6 by bolts 75 installed from below at multiple locations on the outer periphery of the burner 67.
has been fixed through. Franref 6 is a triple tube 2a
s 3a, 4a), and there are passages 79.80 inside that connect the cooling water passages W3, W4 and the cooling water chamber 77 in the burner 67. As shown in Figure 7, the chamber 77 is connected to the adjacent bolt 75.
The entire structure is arranged in a ring.

As shown in FIG. 3, the O-link 90 is also provided on the outer periphery of the bolt 75 and chiton bar 77. Further, an 0 link 91 is also provided at the burner 67 portion that fits into the inner circumferential surface of the flange reflex 6. A bracket 8I is attached to the lower part of the insertion hole of the bolt 75 provided in the burner 67.

Explain the operation. As shown in Fig. 1, the oil, oxygen, and powder supplied to the pipes L and 01P are ejected from the burner 67 through the passage in the nozzle depletion section 13, and the powder is sprayed onto the inner surface of the furnace wall along with the flame. Sanru. In addition, the cooling water supplied from the inlet vibe WB flows into the chamber 8-77 through passages W2 and W4, is reversed at the chamber 77, and flows into the passage iW3.
It is ejected from the passage W3 to the exit vibe WA through Wl. In this way, the cooling water goes on the outward path (burner 67 (III
The lance 1 as a whole is sufficiently cooled because it flows along the entire circumference of the lance 1 both on the way to and on the way back.

Also, since the cooling water flows spirally along the partition plates 11 and 12 through the passages W11W2, it is uniformly cooled over the entire circumference of the lance Lt.

During thermal spraying work, the outer tube 2 becomes hotter than the middle W3.
,! 7. Due to the difference in thermal expansion, the outside W2 expands more than the inside tube 3, but in that case, the talando pad I7 fixed to the rear end 2' of the inside tube 3 Since it slides on 1G, no stress or distortion occurs in the outer tube 2 or the inner tube 3 due to the difference in the amount of elongation.

Also, there is a difference in the amount of thermal expansion between the external cooling 2 and the stopper 9, but the stopper 9 has a cut]0 and each stopper 9 is short, so large stress or distortion will not occur in the external cooling 2 and the stopper 9. .

Next, the replacement work of the nozzle depletion part J3 will be explained. Depletion part 13
Since the iJ is a kind of consumable item, it will need to be replaced periodically with E+9, but the replacement work involves shifting the seal link 4J, removing the bolt 33, and removing the fixing bolt 68 of the burner 67 shown in Fig. 3, and removing the nozzle part J3. After removing it to the front, install the new nozzle part 13 in the reverse order to complete the installation.

France 1 as a whole is installed between D-Lar 5.6 with the rear end at the tip, but in that case, the cooling water pipe at the rear end
WA and wn are removed from the flanges 13.14, and the flanges 23 and supports 26 are removed rearward, and in this state the lance 1 is inserted between the D-lars 5.6.

As explained above, according to the present invention, the lance destination☆iiJ
A flange 30, 32 is provided at the base end of the flange 30, whose outer circumferential parts are connected to each other by a bolt 33, and one flange 30.
An annular groove 40 for attaching and removing bolts is provided on the outer periphery of the flange 30132, and cooling water passage holes 35 and 36 are provided on the outer periphery of the flange 30132.
Cooling water passage hole 35, 36 inside the syllance l and nozzle part 1
The image cooling water passages W11W3 in 3 are communicated with each other through an annular groove 40, and the outer peripheral opening of the door-shaped groove 40 is closed by a seal link 41 so as to be openable and closable. Therefore, the annular groove 40 for attachment and detachment can be used as a cooling water outlet, and the cooling water in the groove 40 and holes 35 and 36 can be used to cool the υ flange 30.
By sufficiently cooling the outer periphery of the flange 30, 32, overheating of the flange 30, 32 and the resulting heat generation can be stopped for 1 hour.

In addition, in the illustrated embodiment, the outer diameter of the flanges 30 and 32 is made smaller to approximately match the outer diameter of the lance l and the nozzle portion 13, so that the cooling effect of the cooling water is greater than that of the flange 30.
．． 32, and overheating of the flanges 30' and 32 is reliably prevented at this point as well.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway side view, @Figure 2 is If - of Figure 1.
If Ii, li side schematic diagram, Figure 3 is an enlarged partial view of Figure 1, Figure 4, 6f''35, Figure 6, and Figure 7 are the bars 11', V-V, W of Figure 3, respectively. -1'f, VB-
Vlli)j IJTI 7L”lS partial diagram.1
...Lance, 13...Nozzle part, 30.32...
Flange, 33... bolt, 35.36... f'r
i 4 Water passage hole, 40...Annular groove, 41...Seal link, wl, W3...Cooling water blood path ii'F Applicant: Shin Nippon Seiya Co., Ltd. (1 other person) Agent: Buried soil Takashi Omori 11' [Figure 6 Figure 7

Claims (1)

[Claims] A flange is provided at the tip of the lance and the base end of the nozzle, whose outer peripheries are connected to each other by bolts, an annular groove is provided on the outer periphery of one flange for attaching and removing the bolt, and cooling water passage holes are provided on the outer periphery of both flanges. , through the cooling water passage hole, both the cooling water passages in the sink and in the nozzle are communicated by valving the 1t" i-shaped groove;
A nozzle connection structure for a lance, characterized in that the outer circumferential opening of the annular groove is closed by a seal so that it can be opened and closed freely.