JPS622234B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to the repair of furnace bodies, particularly those with small or narrow furnace mouths and openings, and with large internal vessels, such as pig iron mixer cars and pig iron mixer furnaces. , relates to a lining device that can be used for internal repair of electric furnaces, RH furnaces, DH furnaces, etc.

[Conventional technology]

The effectiveness of a conventional lining device having a straight throwing pipe has already been demonstrated for general kilns, such as converters, which have a wide furnace opening.

[Problem that the invention seeks to solve]

However, when trying to extend this effectiveness to a furnace with a narrow furnace mouth, such as a pig iron mixer car, the following problems arise.

The problem is how to insert and drive the long shunting pipe into the furnace through the furnace opening.

After inserting the shunting pipe into the furnace body, the problem is how to repair the repaired area located deep inside the space that extends widely in the longitudinal direction.

An object of the present invention is to provide a lining device that can solve the above problems.

[Means for solving problems]

In order to achieve the object, the lining device of the present invention supports a main body on a supporting body so as to be able to rotate and move back and forth, a chain wheel connected to a drive device of the main body is provided coaxially with the axis, and the chain wheel is wound around the chain wheel. A large pipe that can be freely bent by a suspended chain is attached to the tip of the trunk, and the large pipe and a small pipe provided within the large pipe so as to be freely movable forward and backward constitute a shunting pipe, and the small pipe is moved forward and backward. It is characterized in that a screw shaft is provided within the large pipe.

Depending on the opening position of the pig iron mixer, etc., the trunk can be supported either horizontally or vertically with respect to the supporting body, and the supporting body can be either fixed or movable.

Further, the trunk can be configured to move forward and backward on the support body, and can also be configured to be rotated in that state.

〔Example〕

Hereinafter, a case in which an embodiment of the present invention is applied to a pig iron mixing vehicle will be specifically described.

FIG. 1 is a front view of a lining device according to the present invention.

In the figure, reference numeral 1 denotes a vertically extending trunk, which is supported by a supporting body 2 in the form of a trolley that can freely move forward and backward (as can be raised and lowered) and rotated freely.

At the tip (lower end) of the trunk 1, there is a switching pipe 4 whose base end is pivoted by a pivot 3, and the pipe 4 can be rotated at any angle as shown in the figure by a rotation mechanism to be described later. , and can be completely folded until its axis becomes parallel to the axis of the trunk 1.

Below the main body 1, there is a furnace body A of the pig iron mixer car, which is the target object.
is carried in, and the mouth B of the furnace is normally directed upward. The trunk 1 and the shunting pipe 4 are inserted into the furnace mouth B from above in a completely folded state.

For this purpose, the supporting body 2 has a gate-shaped girder 5.
It has become rampant.

Note that by configuring the support body 2 to traverse the girder 5, the shunting pipe 4 can be moved across the furnace body A. Therefore, there is an advantage that the nozzle tip of the shunting pipe 4 can always be opposed to the furnace wall at an appropriate angle of incidence, regardless of whether the furnace mouth B faces in the left or right upper half direction.

Further, as shown in the figure, the furnace body A can be oriented horizontally to either the left or right when lining the bottom part directly below the furnace mouth B, and only the shunting pipe 4 can be inserted from the side. There are times when it is more convenient to do so.

Immediately below the supporting body 2, a shielding body 6 is suspended so as to surround the trunk 1 by cutting out a part of the area that does not interfere with the folding operation of the shunting pipe 4, and a shielding body 6 is suspended above the shielding body 6. A driver's cab will be provided. In addition,
The shield 6 is adapted to rotate simultaneously with the rotation of the trunk 1. However, it is also possible to vertically install the shield 6 in a donut shape.

A raw material tank 7, a compressor 8, etc. are attached to the pillars of the girder 5, and raw material pressure feeding hoses, air hoses, hydraulic pipes, etc. (not shown) are appropriately provided with flexibility in the middle, and are connected to the main body 1. It is connected to the throwing pipe 4.

For this reason, in order to have the trunk 1 function as a duct by organizing such hoses and pipes, it is preferable that the trunk 1 be formed as a hollow tube with both ends open. Furthermore, when the pipe is an upright hollow pipe as shown in the figure, it can also be used as a duct for discharging dust generated during lining work.

If the main body 1, which is essentially a hollow tube, is oriented horizontally, a suction action may be added as necessary.

In addition to functioning as a duct for storing hoses and discharging dust as described above, the trunk 1 also needs to have an outer diameter as small as possible when folded.

For this purpose, as shown in Figure 5, the backbone 1 is U
It is formed of a notched pipe having a cross section such as U-shaped or U-shaped, with one side opened in the longitudinal direction, and the folding pipe 4 is housed in the opening.
Note that there are cases where a partition plate 9 is provided in the longitudinal direction inside the notched tube, and the portion of the trunk 1, which is the hollow tube, is integrally formed.

Further, the distal end portion of such a trunk 1 may be widened into a trumpet shape.

Next, the support mechanism of the trunk 1 will be explained with reference to FIGS. 1, 4, and 5.

The support body 2 traverses on a rail 10 on a girder 5 by rotating wheels 11. Reference numeral 12 denotes the drive device, which is composed of a motor, a speed reducer, a gear transmission mechanism, and the like.

The guide tube 1 of the main body 1 is placed approximately in the center of this support body 2.
3 is inserted vertically, and the guide tube 13 is rotatably supported by a required number of rollers 14 on the upper and lower sides of the protruding flange surface, and the guide tube 1
A gear 17 rotated by a drive device 16 including a motor, a speed reducer, etc. installed on the support body 2 is meshed with a gear 15 fixedly installed around the guide tube 13 to rotate the guide tube 13 at an arbitrary angle. .

The trunk 1 passes vertically through the guide cylinder 13, and the vertical movement and rotational movement of the guide cylinder 13 are transmitted by a required number of guide rollers 18.

That is, the base plate 19 on the guide tube 13 and the base 1 are inserted vertically, and the guide roller 18 is disposed on the base plate 19 and at the lower end of the guide tube 13, and has a rectangular cross section such as a U shape. It guides the rail 20 of the trunk 1.

Further, the lifting device 21 of the trunk 1 is arranged symmetrically on the base plate 19, and the pinion 22 driven synchronously by the lifting device 21 is mounted on a rack 23 fixed to both sides of the trunk 1. They are engaged and the base 1 is moved up and down.

In this way, the trunk 1 is supported by the support body 2 so as to be able to move up and down and turn freely. The driver's cab above the shield 6 is fixed to the guide tube 13.

Next, the configuration and folding mechanism of the shunting pipe 4 will be explained with reference to FIGS. 6 to 10.

In addition, FIG. 6 shows the expansion/contraction mechanism and rotation mechanism of the shunting pipe 4 inverted by 90 degrees from the actual structure.

The dispensing pipe 4 has its base end pivotally attached to the tip (lower end) of the trunk 1 by a pivot 3.

That is, a shaft cylinder 25 is fixed to the shaft 3 and is connected to the base end of the switching pipe 4 via an arm 24, and a chain 27 is wound around a chain wheel 26 fixed to the shaft 3. 27 as core 1
By driving the upper end of the pipe forward and backward using a cylinder or a motor, the discharging pipe 4 can be folded or bent at an arbitrary angle.

Next, the dispensing pipe 4 is normally configured to be extendable and retractable in two stages, and its base end is attached to a large pipe 28 which is pivoted by the pivot 3 as described above, and can be freely stored within the same large pipe 28. small pipe 29
It consists of.

For this reason, the shunting pipe 4 has a relatively simple structure, can have a small folding radius, and can be lined over a wide range.

From the viewpoint of rigidity, it is preferable that the small pipe 29 has a hollow rectangular cross section rather than a hollow circular cross section, and has a nozzle 30 at its tip for spraying spray material, etc.
Its rear part is slidably supported by a bearing 31. Further, a spray hose 33 is connected to the base end of the small pipe 29 via a swivel joint 32.

Furthermore, in order to move the hose 33 and the small pipe 29 smoothly back and forth within the large pipe 28, a guide body 36 with guide rollers 35 is provided along a guide rail 34 disposed in the longitudinal direction within the large pipe 28. It is provided at the connection part of the hose 33.

Further, the spray hose 33 is inserted into the large pipe 28 through an insertion port 37, and appropriate guide rollers 38 are provided before and after the insertion port 37 to ensure that there is no hindrance to the operation during folding and bending/stretching. It's summery.

In order to bring the injection nozzle 30 closer to the target location and rotate it repeatedly, the shooting pipe 4 is connected to the small pipe 29 using the guide body 36.
In order to stretch, the large pipe 2 is used as a rotating mechanism.
8, and a screw shaft 40 driven by the motor 39 and supported in the longitudinal direction within the large pipe 28. 41 can be screwed together and reciprocated.

Furthermore, there is another motor 42 in the large pipe 28, and a pinion 44 provided at the tip of its rotating shaft 43.
is engaged with an internal gear 45 having the bearing 31 at its center, and the gear 45 is rotatably mounted at the tip of the large pipe 28.

Note that 46 is a support plate that also serves as a lid for rotatably supporting the internal gear 45. Therefore,
The throwing pipe 4 is extended to an appropriate length, and the nozzle 30 can be rotated repeatedly at that position.

Next, since such a shunting pipe 4 is exposed to high heat, it is necessary to cool it.

For this purpose, the large pipe 28 has a double wall structure as shown in FIG. If a cooling water hose is connected to the base end of the return path 49 and a condensate hose is connected to the base end of the return path 49 to supply cooling water, the cooling water enters from the base end of the large pipe 28 and flows along its length. It flows down the outgoing path 48 along the direction, and the return path 4 flows at the tip.
9 and further flows down the return path 49 to be led out from the base end of the large pipe 28.

Therefore, such a cooling structure can effectively cool the shunting pipe 4, and can prevent thermal effects on the expansion/contraction and repeated rotation operations of the pipe 4.

Furthermore, this cooling structure is also used in the backbone 1 as well.

That is, as shown in FIGS. 7 and 12, the trunk 1 has a double structure similar to the large pipe 28, and the passage within the double wall is partitioned in half in the longitudinal direction by a partition 50. The outgoing path 51 and return path 52 formed thereby are located at the base end (upper end) of the trunk 1.
, each has a connection port 53 for a cooling water hose and a connection port 55 for a condensate hose 54, and a large number of bearing fittings 56, 57 are provided at the tip (lower end) of the trunk 1 to pivotally support both ends of the pivot 3. They communicate with radial communication holes 58 and 59, respectively.

Furthermore, the radial communication holes 58 and 59 communicate with central holes 60 and 61 extending at the center of the pivot 3, respectively, and the other ends of the concentric holes 60 and 61 are connected to conduits 62 and 61, respectively.
63 to the base end connection port 6 of the large pipe 28
It communicates with 4,65.

Further, the conduits 62 and 63 are led out from a position where rotation of the shaft tube 25 is not hindered, or by means such as a long hole.

In the figure, 66 and 67 are the radial communication holes 58,
59 and the center holes 60, 61. By rotating the valves 66 and 67, the amount of cooling water can be adjusted.

In addition, in the case shown in FIGS. 11 and 12, the condensate hose 54 is formed to be extendable or bendable, and the other end is connected to the middle of the spray hose 33 that passes through the trunk 1, Hot water with a controlled flow rate can be introduced into the hose 33.

When configuring as above,
As shown in Figure 3, a narrow furnace mouth B like that of a pig iron mixer A
The shunting pipe 4 can be inserted under the folded condition into the furnace, and then in the furnace,
While rotating and bending the pipe 4 to a required angle,
The trunk 1 is rotated appropriately to direct the rotation, and the pipe 4 is further extended to an appropriate length to form a nozzle 30 at the tip.
By bringing the nozzle 30 close to the target location and repeatedly rotating the nozzle 30, it is possible to perform hot spray repairs on the furnace wall.

Therefore, even if the inside of the furnace expands laterally with respect to the furnace mouth B, the shunting pipe 4 inserted through the narrow furnace mouth B can be bent and extended in the desired direction. , the pipe 4 is attached to the wall of the furnace mouth.
can be driven without contact or collision.

Furthermore, the shunting pipe 4 can be removed from the furnace mouth B by performing a reverse operation to that described above.

Further, this operating method will be explained in detail with reference to the schematic diagram shown in FIG.

This device can be roughly divided into two types: one in which the shunting pipe 4 is inserted and used while it is folded, and the other in which it is inserted and used in an extended state.

The above case is carried out according to the steps A, B, and C in the same figure, and is the basic usage pattern of this device.

That is, first, the shunting pipe 4 is inserted into the furnace body A in a folded state relative to the main body 1 through the furnace mouth B (see FIG. 1, A).

Next, when the tip (lower end) of the trunk 1 reaches the lowest position, the shunting pipe 4 is rotated to open, and at this time, the trunk 1 is rotated as necessary to open the pipe 4. is directed in the longitudinal direction of the furnace body A (see figure 2).

Finally, the trunk 1 is raised slightly to open the throwing pipe 4 at a desired angle, and the pipe 4 is extended telescopically toward the area to be repaired, while the small pipe 29 is repeatedly rotated to perform lining. It is something. (See figure C).

In this way, even if the inside of the furnace body expands in a direction perpendicular to the furnace mouth, the injection nozzle 30 of the shunting pipe 4 can be placed in the area, so that during hot The lining can be easily repaired as well as containers with wide openings such as ladles.

Next, the above case is a special usage state performed in the steps of A, B, C, and D in the same figure.

First, the shunting pipe 4 is inserted from the furnace mouth B in a state in which it is extended substantially perpendicularly to the main body 1. (See Figure 1).

Next, when lining the bottom part of the furnace, the shunting pipe 4 is further lowered, bent, and the trunk 1 is rotated to open the injection nozzle 30.
Direct it toward the bottom of the hearth (see figure B).

Furthermore, when lining the longitudinal part of the furnace body A, the trunk 1 is lowered while the shunting pipe 4 is bent at an almost right angle (see C in the same figure), and finally the pipe 4 is extended and The lining is performed while repeatedly rotating the small pipe 29 (see d in the same figure).

In addition, in any of the above cases,
After the shunting pipe 4 is bent at approximately 45 degrees and reduced in size, the main body 1 is turned 180 degrees, so that the portion in the direction opposite to that shown in the drawing can be similarly lined.

Incidentally, the folding or bending operation of the shunting pipe 4 is performed in the steps shown in FIG. 14A, B, and C.

As mentioned above, the above-mentioned shunting pipe 4 can be used in any direction for convenience of work.

In the configuration of each part, it is possible to take appropriate measures without departing from the scope of the present invention, and it is also conceivable to add a tilting mechanism for the base 1, especially when the base 1 is to be horizontal.

〔Effect of the invention〕

As explained above, in the lining device of the present invention, by arranging the small pipe that moves forward and backward along the helical axis within the large pipe of the entire switching pipe, The shunting pipe can be expanded and contracted by reducing vibration at the tip of the small pipe. Therefore, it is possible to insert the bent pipe into the furnace through the narrow furnace opening, and it is also possible to accurately direct the tip of the pipe to a predetermined location on the inner surface of the furnace wall. can. In this way,
According to the present invention, repairs within the furnace can be reliably performed.

[Brief explanation of the drawing]

FIG. 1 is a front view of a lining device having a bendable and telescopic shunting pipe according to the present invention, FIG. 2 is a side view of the same, and FIG.
4 is a vertical sectional side view showing the supporting mechanism of the trunk, FIG. 5 is a plan view of the same, FIG. Figure 6 is an enlarged longitudinal sectional front view taken along line 6, Figure 8 is a plan view of the same, Figures 9 and 10 are longitudinal sectional side views taken respectively taken along line 6 and line -, respectively, and Figure 11 is a trunk and shunting section. FIG. 12 is a cross-sectional plan view taken along the line shown in FIG. 11, FIG. 13 is an explanatory diagram showing insertion and bending/extending operations of the shunting pipe, and FIG. 14 is a diagram showing the shunting pipe. It is an explanatory diagram showing a folding operation of. 1: Backbone, 2: Support body, 3: Pivot, 16: Drive device, 26: Chain wheel, 27: Chain, 28: Large pipe, 29: Small pipe, 40: Spiral shaft.

Claims (1)

[Claims] 1 A main body is supported on a supporting body so as to be rotatable and movable, a chain wheel connected to the drive device of the main body is provided coaxially with the pivot, and a large pipe that can be bent freely by a chain wrapped around the chain wheel is attached to the main body. The large pipe attached to the tip and a small pipe provided in the large pipe so as to be movable back and forth constitute a shunting pipe, and a screw shaft for moving the small pipe back and forth is provided in the large pipe. A lining device having a bendable and expandable throwing pipe.