JPH0810378Y2 - Burner connection structure of lance device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a lance device for spraying repair material powder onto the inner surface of a furnace, and relates to a connection structure between a lance body and a burner attached to the tip of the lance body. The present invention relates to a burner connection structure for a lance device suitable for repairing the inner surface of a narrow space.

[0002]

2. Description of the Related Art First, the structure of the entire lance device will be briefly described with reference to FIG. A rail base 4 is supported on the carriage 1 via front and rear lift mechanisms 2 and 3, and a rail 6 of the rail base 4 is supported.
A lance body 10 is supported on the slider via a slider 8. A drive device 11 is mounted on the slider 8, and the drive device 11 can move the lance body 10 together with the slider 8 back and forth on the rail 6 and rotate the slider 8 around the axis of the lance body. You can The carriage 1 is provided with wheels 5 and an outrigger 7 for position fixing. The burner 13 for thermal spraying is connected to the front end of the lance body 10 and is inserted into the steel exit hole A of the converter T together with the lance body 10 so that the inner surface A of the steel exit hole A of the converter T or the like is filled with ceramic powder or metal powder. The repairing material powder such as is sprayed to repair those damaged parts.

In such a lance device, as a connection structure of the burner 13, there is conventionally a connection structure as shown in FIGS. FIG. 6 shows the lance body 10 and the burner 13.
A flange-shaped connection structure in which outwardly projecting flanges 14 and 15 are formed on each of the flanges 14 and 15 and the flanges 14 and 15 are fastened together by bolts 16.
A cooling water passage 17 is provided in the burner 13.

In FIG. 7, an outwardly projecting flange 14 is formed on the lance body 10, the end face of the burner 13 is made larger than the end face of the lance body 10, and the flange 14 is fastened to the end face of the burner 13 with a bolt 16. It is a one-flange type connection structure and is provided with a cooling water passage 17 similar to that shown in FIG.

In FIG. 8, a space S for boll insertion is formed on the outer periphery of the lance body 10, and the space S is utilized to make the bolt 1
6 is inserted, the lance body 10 and the burner 13 are connected by the bolts 16, and the space S is covered with the sleeve 18, so that the space S in the sleeve 18 serves as a cooling water chamber.

[0006]

The burner of the lance device and its connecting portion are required to have heat resistance and compactness. In particular, when repairing the inner surface of the tapped hole A of the converter T in FIG. 4, since the diameter is made small, the ambient temperature has risen to about 1500 ° C. and the thermal spraying by the burner 13 is performed. At the time of work, the flame for spraying is reflected on the burner side, and the temperature around the burner is 2
The temperature rises to around 000 ° C.

Under such working conditions, in the flange type burner connection structure of FIGS. 6 and 7, the lance body 10 and the burner 1 are cooled by the cooling water in the cooling water passage 17 inside.
Although the body part of 3 is cooled, the head of the bolt 16 and the ears of the flanges 14 and 15 are exposed to the outside,
Since the heating is intense and the cooling effect is small, their deterioration rate is fast. Therefore, as described above, it is not suitable for repairing the inner surface of the tap hole A of the converter T which becomes extremely hot. Further, in the structure of FIG. 6, since the flanges 14 and 15 are projected outward, it is difficult to insert them into a narrow tap hole, and the flanges 14 and 1 are not easily inserted.
There is a high possibility that 5 will come into contact with the inner surface of the tapped hole and damage it.

On the other hand, in the sleeve type connection structure of FIG. 8, the head of the fastening bolt 16 is blocked from the outside by the sleeve 18, and the bolt 16 and the sleeve 18 are directly cooled by the cooling water in the space S. Therefore, it is possible to prevent them from deterioration due to high heat. However, as the O-ring 19 that fits on the inner circumference of the sleeve 18,
Since it is necessary to be compressed and deformed by the sleeve 18, a steel ring cannot be used, and a resin ring is used, and the heat resistant temperature thereof is 200 ° C. to 300 ° C. at most, so even if the space S Even if cooled with cooling water,
The entire burner can only exhibit heat resistance of about 1500 ° C., and the resin O-ring 19 portion becomes a weak point of heat resistance. Further, since the sleeve 18 is fitted to the outer peripheral side of the lance body 10 or the like, a protruding portion is formed on the outer peripheral side, which is not suitable for insertion into a narrow hole such as the tapped hole A.

[0009]

In order to solve the above problems, the present invention provides a female screw on one of the mating surfaces of the leading end mating surface of the lance body and the trailing end mating surface of the burner that abuts on the mating thread.
A bolt insertion hole corresponding to the female thread is formed on the other mating surface, cooling water passages are provided within the outer peripheral diameters of the lance body and the burner body, respectively, and the female thread and the bolt insertion hole are located, and the lance body or Of the burner, a member having the above-mentioned bolt insertion hole is formed with a pocket communicating with the bolt insertion hole and opening to the outside so that the entire bolt can be inserted, and a fastening bolt inserted from the pocket is screwed into a female screw. By tightening the burner on the lance body,
The pocket is filled with a heat-resistant filling member that shields the bolt head side from the outside.

[0010]

When the burner 13 is connected to the lance body 10, the bolt for fastening the burner is inserted from the pocket,
Connect the burner to the lance by screwing on the female thread, and then insert the heat-resistant filling member in the pocket,
Completely shield the bolt from the outside. As a result, the bolt is not directly exposed to the external atmosphere and is cooled by the cooling water in the lance body and the burner.

[0011]

2 is a rear view of a burner 13 to which the present invention is applied, the main body 13b of the burner 13 is made of copper and has a circular cross-sectional shape. A material powder passage 21 is provided, an inlet cooling water passage 24 and an outlet cooling water passage 25 are provided on the left and right of the central portion, and an oxygen passage 23 is provided on the left and right above the propane gas passage 20.
It has. The cooling water passages 24 and 25 are respectively located above and below the cooling water branch passages 24a and 2 in the middle of the burner body 13b.
4b, 25a, 25b. Each of the above passages 20,
The annular O-ring grooves 26, 27, 28, 2 are provided on the outer peripheral side of the rear end mating surfaces 13a of 21, 23, 24, 25, respectively.
9 is formed.

Four bolt insertion holes 30 are formed at the upper, lower, left and right ends of the rear end mating surface 13a. Each bolt insertion hole 30 is located within the outer peripheral diameter of the burner body 13b.
It is located close to 25. The oxygen passage 23 and the cooling water passages 24 and 25 communicate with the oxygen passage (not shown) and the cooling water passage (not shown) on the lance body 10 side in FIG. 1, respectively.

In FIG. 1 showing the rear view of the burner alone, the lower end of the burner main body 13b is cut off from the front end over a certain length to form a flat injection surface 39, and a large number of injection surfaces 39 are formed on the injection surface 39. An injection nozzle 38 is provided for the repair material powder made of aluminum oxide, and a large number of flame nozzles (not shown) are formed. Each injection nozzle 38 is connected to the repair material powder passage 21 in the burner body 13b, and the flame nozzle is a propane gas passage 20 and an oxygen passage 23 (FIG. 2).
Is in communication with. In the repair material powder passage 21, a distributor 35 having a spider-shaped cross section is installed inside a cover pipe 36, and the distributor 35 evenly distributes the repair powder to each injection nozzle 38.

A pocket 31 for inserting a bolt, which communicates with the front end of each of the bolt insertion holes 30, is formed in the burner body 13b.
Are formed, and the pockets 31 on the lower end side are opened as they are toward the front, and the remaining three pockets 31 on the left and right sides and the upper end are opened on the outer side in the radial direction. The outer diameter of the pocket 31 is formed to be at least larger than the outer diameter of the head of the bolt 46, and the length L in the front-rear direction of the opening portions of the three pockets 31 having openings on the outer side is approximately the length of the bolt 46. Corresponding to the size, at least the above pocket 31
The bolt 46 can be inserted into the bolt insertion hole 30 from.

The front end mating surface 10a of the lance body 10 is formed in a circular shape having the same diameter as the rear end mating surface 13a of the burner body 13b, and the female screw 45 is formed at a position corresponding to each of the bolt insertion holes 30. And the bolt insertion hole 30
The burner 13 is connected to the lance body 10 by screwing the bolts 46 inserted into the respective female screws 45.
As a result, the outer peripheral surfaces of the lance body 10 and the burner body 13b are connected in a cylindrical shape without any unevenness. Each pocket 31
A heat-resistant material plug (heat-resistant material filling member) 32 having a little elasticity is detachably fitted in the
2 fills substantially the entire volume of the pocket 31 and completely shields the head of the bolt 46 from the outside. Reference numerals 50 and 51 are resin O-rings that seal the mating surface portions of the propane gas passage 20 and the repairing powder passage 21, respectively.

In FIG. 3 showing the front view of the burner alone, the inlet cooling water branch passages 24a, 24b are connected to the outlet cooling water branch passages 25a, 25 via communication passages 53, 54, respectively.
b, so that the cooling water in the inlet cooling water passage 24 is connected to the inlet cooling water branch passages 24a, 24b, the communication passage 53,
54 and the outlet cooling water branch passages 25a and 25b to return to the outlet cooling water passage 25. The operation will be briefly described. 4, the burner 13 is inserted into the tap hole A while rotating together with the lance body 10, and the metal powder or the ceramic powder injected from the injection nozzle 38 of FIG. 1 is melted by the flame from the flame nozzle, The inner surface of the tapped hole A (Fig. 1) is sprayed.

Since each bolt 46 is completely shielded from the outside by the heat-resistant plug 32 or the like, it is not directly affected by the high temperature atmosphere outside and the lance body 1
0 and the burner body 13b are embedded in the lance body 10 and the burner body 13 together with the cooling water passages 24 and 25. In particular, the left and right bolt insertion holes 30 and the female screw 45 in FIG.
Is formed near the cooling water passages 24 and 25, and the cooling effect is extremely excellent. By the way, it can exhibit heat resistance of about 2000 ° C. When replacing the burner 13,
The heat resistant plug 32 may be removed and the bolt 46 may be removed.

[0018]

Another Embodiment FIG. 5 shows another embodiment, which has a structure in which a bolt insertion hole 30 and a pocket 31 are formed on the lance body 10 side, and a female screw 45 is formed on the burner body 13b. The number of bolts, female screw holes, bolt insertion holes, and pockets is not limited to four, respectively, and three or five or more may be provided. It can also be used to repair the inner surface of the converter T itself and the tapped steel hole or the inner surface of the coke oven.

[0019]

As described above, according to the present invention: (1) The lance body 10 and the burner body 1 are provided with the burner fastening bolt 46 using the bolt insertion pocket 31.
3b, and the pocket 3
1 is filled with a plug made of heat-resistant material so that the entire bolt 46 is completely shielded from the outside, so that the bolt 46 is completely shielded from the high temperature atmosphere of the outside as compared with the conventional flange type connection structure. Together with the lance body 10
Further, the cooling water passages 24, 25 are arranged close to each other in the burner body 13b, so that the deterioration of the bolt 46 due to heating can be prevented and the heat resistance of the entire burner can be improved.

(2) Since a flange or a sleeve is not required as in the conventional case, there is no convex portion protruding outward from the lance body 10 to the burner body, and therefore the tapped hole A of the converter T is eliminated. In thermal spraying work in a narrow space, it can be inserted without worrying that a convex portion such as a flange will come into contact with the inner surface of the tapping hole, thus improving workability.

(3) Compared with the conventional sleeve type connection structure,
Since it is not necessary to provide the resin O-ring 19 as shown in FIG. 8 on the outer peripheral side, the above-mentioned weakness of heat resistance in the sleeve type can be eliminated.

[Brief description of drawings]

FIG. 1 is an enlarged vertical sectional view of a burner connecting portion of a lance device to which the present invention is applied.

FIG. 2 is a rear view of the burner alone (view from the arrow II in FIG. 1)
Is.

FIG. 3 is a front view of the burner alone (a view of arrow III in FIG. 1)
Is.

FIG. 4 is a side view of the entire lance device.

FIG. 5 is a vertical sectional view of a burner connecting portion of another embodiment.

FIG. 6 is a side view of a burner connection portion of a conventional example.

FIG. 7 is a side view of a burner connection portion of a conventional example.

FIG. 8 is a side view showing a partial cross section of a burner connection portion of a conventional example.

[Explanation of symbols]

 10 Lance body 10a Lance body mating surface 13 Burner 13a Burner mating surface 24 Inlet cooling water passage 25 Outlet cooling water passage 30 Bolt insertion hole 31 Pocket 32 Heat resistant material plug (heat resistant material filling member) 45 Female thread 46 Bolt

Front page continuation (72) Takeshi Matsuoka 3-9-39 Mikuni Honcho, Yodogawa-ku, Osaka City, Osaka Prefecture Japan Aluminum Industry Co., Ltd. (72) Yasuyuki Morimoto 3--9, Mikuni Honcho, Yodogawa-ku, Osaka City, Osaka Prefecture No. 39 Inside Nippon Aluminum Industry Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A female thread is formed on one mating surface of the leading end mating surface of the lance body and a rear end mating surface of the burner that abuts against this, and a bolt insertion hole corresponding to the female thread is formed on the other mating surface. The cooling water passages are respectively provided within the outer peripheral diameters of the lance body and the burner body, the female screw and the bolt insertion hole are located, and the member having the bolt insertion hole of the lance body or the burner communicates with the bolt insertion hole. And a pocket into which the whole bolt can be inserted is formed by opening to the outside, and the burner is fastened to the lance body by screwing the fastening bolt inserted from the pocket to the female screw, and the bolt head is provided in the pocket. A burner connection structure for a lance device, which is filled with a heat-resistant filling member that shields the side from the outside.