JPS622235B2 - - Google Patents

Description

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

[Problems to be Solved by the Invention] 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.

In particular, the structure must be sufficiently durable against heat.

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 equipped with a water-cooled jacket having a reciprocating waterway in a rotatable and movable manner by a supporting body, and a shunting pipe equipped with a water-cooling jacket having a reciprocating waterway. is attached to the tip of the trunk by a pivot so that it can be bent freely, and an independent water guide circuit is provided on one side of the pivot for an outgoing route and on the other side for a return route, so that the water in the water cooling jackets of the trunk and the shunting pipe goes around once. According to the present invention, each reciprocating water channel of the water cooling jacket provided on the main body and the shunting pipe is connected by the water conduction circuit.

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. Furthermore, the trunk can be configured to move forward and backward on the support body, and can also be configured to turn in that state. Also, when supporting the core horizontally,
A tilting mechanism for the main body may be provided.

〔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 bent at any angle as shown in the figure by a rotation mechanism to be described later. Moreover, it 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 into the furnace mouth B, usually facing 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 fuselage 2 to move across the girder 5, it is possible to move the shunting pipe 4 while straddling 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 main trunk 1 by removing 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 Figures 2 and 3,
The trunk 1 has a U-shaped or U-shaped cross section, and is formed of a notched pipe with one side open in the longitudinal direction, and the opening section accommodates a folded shutting pipe 4.

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 and 2.

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, and the guide tube 13 is rotated 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. 4 to 7.

Note that FIG. 4 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 pivot 3 and is connected to the base end of the shunting pipe 4 via an arm 24, and a chain 27 is wound around a chain wheel 26 fixed to the pivot 3. 27 as core 1
By moving the upper end of the pipe forward and backward using a cylinder or a motor, it is possible to fold or bend the shunting pipe 4 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, so as not to hinder movement during folding and bending and 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 shunting pipe 4 has a water-cooled jacket structure.

That is, 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 large pipe 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 in the longitudinal direction. It flows down the outgoing path 48 along the same line, communicates with the return path 49 at the tip, further flows down the return path 49, and is led out from the base end of the large pipe 28.

Therefore, this water-cooled jacket structure can effectively cool the shunting pipe 4 and cool the pipe 4.
It is possible to prevent thermal effects on the expansion/contraction and repetitive bending movements of the body.

Furthermore, this water-cooled jacket structure is also used in the main body 1 as well.

That is, as shown in FIGS. 5 and 9, the trunk 1 has a double structure similar to the large pipe 28, and the passage within the double wall is divided into halves in the longitudinal direction by a partition 50. Thereby, an outgoing path 51 and a returning path 52 are formed.

Further, the water-cooling jacket structure of the main body 1 is connected to the water-cooling jacket structure of the above-mentioned shunting pipe 4 through a water conduction circuit.

That is, the outbound path 51 and the return path 52 have a connection port 53 for the cooling water hose and a connection port 55 for the condensate hose 54, respectively, at the base end (upper end) of the trunk 1.
The tip (lower end) of the trunk 1 communicates with a large number of radial communication holes 58 and 59 provided in bearing fittings 56 and 57 that pivotally support both ends of the pivot 3, respectively.

Further, the radial communication holes 58 and 59 communicate with central holes 60 and 61 extending at the center of the pivot shaft 3, respectively, and the other ends of the concentric holes 60 and 61 are connected to a conduit 62,
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. 8 and 9, 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, Figures 1 and 10
As shown in FIG. 1 and FIG. 11, the shunting pipe 4 can be inserted in a folded state into a narrow furnace mouth B such as a pig iron mixer A, and then the pipe 4 is rotated and bent at a required angle, and the trunk 1 is appropriately rotated to direct the rotation,
Further, extend the pipe 4 to an appropriate length and bring the nozzle 30 at the tip closer to the target location.
By repeatedly rotating the 0, spraying repairs on furnace walls can be carried out in hot conditions.

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.

Further, through the above-mentioned operation, the shunting pipe 4 can be cooled integrally with the trunk, and the adverse effects caused by high heat inside the pig iron mixer car, that is, deformation and damage to the shunting pipe 4 and the trunk 1 can be completely prevented.

〔Effect of the invention〕

As explained above, in the lining device of the present invention, cooling water is sent from the main body through the pivot to the shunting pipe by the water conduit circuit that connects the outgoing and incoming paths independently, and the used water is sent in the reverse path. cooling water is being returned. For this reason, the core
It is possible to effectively cool each member such as the pivot shaft and the shunting pipe, and it is also possible to effectively cool the shunting pipe beyond the bending part. In particular, since there is effective cooling of the axis,
Even heavy switching pipes can be safely and accurately supported and accurately bent without causing thermal distortion or damage to the pivot shaft. Furthermore, since the water cooling mechanism is integrated into the pivot, it has a simple and compact structure.
Furthermore, maintenance and inspection become easier.

[Brief explanation of the drawing]

FIG. 1 is a front view of a lining device having a bendable shunting pipe according to the present invention, and FIG.
The figure is a longitudinal cross-sectional side view showing the support mechanism of the main body, Fig. 3 is a plan view of the support mechanism, Fig. 4 is a longitudinal cross-sectional side view showing the structure of the shunting pipe, and Fig. 5 is taken along the line shown in Fig. 4. An enlarged longitudinal sectional front view, FIG. 6 is a plan view of the same, FIG. 7 is a vertical sectional side view taken along the line of FIG. 4, FIG. Figure 8-
10 and 11 are diagrams illustrating working conditions. In the diagram, 1: Core, 2: Support body, 3: Pivot,
4: Shooting pipe, 5: Girder, 2
8: Large pipe, 29: Small pipe, 30: Nozzle,
33: Spraying hose, 51: Outbound, 52: Return, 5
4: Condensate hose.

Claims (1)

[Claims] 1. A trunk equipped with a water-cooling jacket having a reciprocating waterway is supported by a supporting body so as to be rotatable and movable, and a shunting pipe equipped with a water-cooling jacket having a reciprocating waterway is attached to the tip of the trunk by a pivot so that the trunk can be bent freely. An independent water conduction circuit is provided on one side of the shaft for an outgoing route and on the other side for a return route, and the water conduction circuit connects the main body and the above-mentioned shunting pipe so that the water in the water cooling jackets of the above-mentioned main body and the shunting pipe goes around once. A lining device having a water-cooled shunting pipe, characterized in that each reciprocating channel of a water-cooled jacket provided on the shunting pipe is connected to the water-cooled shunting pipe.