JPS5926868B2 - How to transport and install a horizontal rotary furnace - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in transportation and installation methods for horizontal rotary furnaces.

FIG. 1 is a front view showing the entire horizontal rotary furnace apparatus, in which a cylindrical furnace body 1 has support tires 2 at several locations and is rotatably supported by support rollers 3.

The roller bearings 4 are fixed to bearing pedestals on concrete foundations 7 and 8.

Further, in order to rotate the furnace body 1, a large gear 5 is provided on the furnace body 1, and a small gear that meshes with the large gear 5 is rotated by a drive device 6 consisting of an electric motor, a speed reducer, etc.

The furnace body 1 is installed at an angle with the raw material charging side slightly elevated, and the inside thereof is lined with a refractory material.

The transportation and installation of these items using conventional construction methods will be briefly explained.

The furnace body 1 is manufactured by being divided into lengths of several meters to more than ten meters for convenient transportation and handling.The support roller 3 of the tag support device, the bearing 4 for the roller, the large gear 5 of the drive device 6, the small gear and bearing, and the speed reducer. machine・
Electric motors, emergency prime movers, reduction gears, etc. are transported individually or as assembled parts.

The concrete part of the support frame is constructed in advance together with the underground foundation, and the entire support roller 3, roller bearing 4, bearing stand, and drive device 6 are placed and assembled on top of this frame using a lifting machine or the like. .

Thereafter, the furnace side part having the supporting tires 2 is mounted on top, and the body is sequentially welded and extended, and the large gear 5 is attached and connected to the drive device 6.

A large furnace body 1 has a diameter of 5 to 6 m, a length of 70 to 100 m, and a weight of steel for the furnace body of several hundred tons or more, and a large furnace body of more than 1,000 tons.

In order for these long and heavy rotary furnaces to be supported and rotated at three or four points, the centers of each fulcrum must be in a perfectly straight line, and the welding work to connect the extension of the body must be carried out at a high place and suspended. Because the work is carried out under such conditions, it requires highly advanced technology, and at the same time requires a large amount of processing costs to ensure quality maintenance and safety control.

The object of the present invention was to solve the above-mentioned drawbacks, and to provide a horizontal rotary furnace in which the rotary furnace body and its supporting part are transported and installed as an integral block, thereby shortening the construction period, ensuring quality, and reducing costs. Provide transportation and installation methods.

In order to achieve such an object, the present invention involves assembling a furnace body, a drive device, a rotation device, and a support device, which are made into a long shape by welding adjacent body parts in advance, on a steel support frame. After the attachment is fixed, the support frame is transported to an installation position by a transport vehicle placed below the support frame, and the support frame is installed and fixed on the foundation.

The method of the present invention will be explained below using examples shown in the figures.

FIG. 2 is a front view showing the entire horizontal rotary furnace transported and installed by the method of the present invention, with frames 7' and 8 for supporting the furnace body.
', 9' are made of steel and manufactured in a factory.

The steel frames 7/, 8/, and 9/ are used as transport frames during transportation and as support frames during installation, or are used as they are.
Or, the main feature is that it is wrapped in concrete,
The main body and the main parts of the support/drive mechanism are no different from the type shown in FIG.

FIG. 3 is a view taken along the line A--A in FIG. 2.

The method of the invention will now be described with reference to a few examples.

Figures 4 to 7 show the block transportation form for two fulcrum parts, Figures 8 to 11 show the block transport form for one fulcrum part, and Figure 12 shows the block transportation form for a narrow installation. FIG. 3 is a plan view showing how a vehicle approaches the location.

In FIG. 4 and FIG. 5, reference numeral 1 is a furnace body, 2 is a support tire, 3 is a support roller, 4 is a roller bearing, 8', 9
1 is a steel support frame, 10 is a transportation support saddle, 11 is a lashing band, 12 is a lashing stopper, 13 is a bearing stand with a built-in lifting device, 14 is a dunnage material, and 15 is a transport vehicle.

The furnace trunk including the support tire 2 is aligned and assembled on the support frames 8' and 9' provided on the assembly surface plate in alignment with the support roller 3, and the adjacent trunk is supported and rotated by the support roller 3. are successively welded together to form a long cylindrical furnace body 1 as shown in FIG.

After that, the support tire 2 is pushed up by the built-in lifting device of the bearing stand 13, the support roller 3 and the roller bearing 4 are moved on the bearing stand 13 so as to widen the gap between them, and the support saddle 10 is placed in the gap. It is inserted under the front and rear torso in contact with the support tire 2 and fixed to the bearing stand 13.

After the fixing is completed, the lifting device in the bearing stand 13 is lowered, the furnace body 1 is placed on the support saddle 10, the lashing band 11 is applied, and the lashing stopper 12 to prevent movement is attached to the furnace body 1 side. Attach.

Note that the lifting device may be of any type, such as a hydraulic type or a screw type.

4 and 5 show a method in which the furnace body in contact with the support tire 2 is supported by installing a support saddle 10 on a bearing stand 13. , 6th
As shown in FIG. 7, a support saddle 10 is mounted on a bearing stand 13.
As shown in the figure, the furnace layer is directly attached to the frame 8' to support the furnace layer.

The support rollers 3 are spaced slightly apart on the left and right so that no load is applied to them; however, in this case, a lifting machine is not installed, and the spacing adjustment bolts of the roller bearings 4 are loosened to adjust the spacing between the bearings 4 on the left and right. When the furnace body 1 is moved to expand, the furnace body 1 is lowered and rests on the support saddle 10' inserted in advance.

On the other hand, the support saddle 10 can be removed during installation by reversing these steps.

FIGS. 8 and 9 show the furnace body block in a portion where only one support tire 2 is formed in substantially the same manner as in FIGS. Tires, 7' is a steel support frame, 10 is a transportation support saddle, 11
1 is a transportation lashing band, 12 is a transportation lashing stopper, 1
6 is a large gear for rotating the furnace body, 17 is a reduction gear of the drive device, 18
indicates the drive motor.

Further, 19 is a transportation frame, 20 is a lashing band, 21 is a lashing stopper, 14 is a dunnage material, and 15 is a transport vehicle.

The assembly method is substantially the same as that shown in FIG. 4, except that a transport frame 19 is used for the left side portion where there is no support tire 2.

A gap is provided and an appropriate cushioning material is inserted into the furnace body receiving surface of the support saddle 10 so that the two members are in direct contact and the skin surface etc. are not damaged during transportation.

The transportation is carried out by incorporating a transportation device under the support structure and the inside of the support column of the transportation structure, as shown in FIGS. 4 to 9.

Although this example shows a method using a multi-wheeled self-propelled trailer, it is also possible to use an endless track vehicle, a roller truck, an air or hydraulic floating pallet, etc. Select the appropriate one according to the width, radius of curvature, allowable wheel load, bearing capacity of the ground, etc.

For example, in the case of a narrow road with a small radius of curvature,
A turntable is used in addition to dunnage on a vehicle, and turning can be easily performed by rotating the turntable.

In addition, if there is a small gap between the support and the vehicle and there is a risk that the vehicle will hit the support, it is possible to assemble the support by increasing the distance between the support in advance or using a removable support below the vehicle interference area. It can also be used during installation, transportation, etc.

As shown in Figures 4 to 8, this block was transported with the longitudinal direction as the direction of travel, and after entering the installation foundation as it is and adjusting the center and horizontality, etc., it was transported by the lifting operation of the transport vehicle or by another Accurately install on the foundation using a ground-mounted lifting machine.

If the area around the installation location is narrow, temporarily place the block in front of the installation location, rearrange the vehicle direction at right angles (or diagonally) as shown in Figures 10 and 11, and then As shown in Figure A, it enters the installation center line at right angles (or diagonally), and after adjusting the centering etc., it is installed on a predetermined foundation 21 as shown in Figure A.

After fixing the frame on the foundation 21, remove the support saddle 10 of the furnace body 1 in the reverse order of the above explanation, and adjust the support tires 2 and support rollers 3 so that the furnace body 1 aligns with the furnace center line. , After adjusting each block, the drive device 16 installed on the pedestal
Rotate the furnace body 1 using a tool such as ゜17.18, and finish it into two pieces by downward welding.

In addition, if the frame needs to be a concrete structure, underground concrete reinforcing bars or steel frames are extended above the ground on the top surface of the foundation 21, and after installation is completed, they are connected and fixed to the main frame supports, and the entire structure is made of concrete. By solidifying it, that purpose is achieved.

In addition, in the above-mentioned embodiment, the steel support frame is used not only during installation but also at the assembly factory, and the support device and drive device are installed on it in advance, and after a trial run and adjustment, the steel support frame is used together with a vehicle, etc. Regarding the transportation and installation method, an embodiment will be described below with reference to drawings in which a concrete frame or the like is completed together with its foundation at the installation location.

Figures 13 and 14 show the furnace body 1 and supporting tires 2, which have been temporarily assembled and tested on an assembly stand set on an assembly surface plate.
, support roller 3, roller bearing 4, transportation support saddle 1
0. A lashing band 11', a lashing stopper 12, and a bearing stand 13 with a built-in lifting device were assembled and lashed together on a transport mount in 2014, and transported by a transport vehicle 15. Indicates the condition.

To load each device assembled into a large block onto a transport vehicle, place the bearing stand 13 on a block surface plate such as the pedestal 30 shown in FIGS. 15 and 16, assemble each device on it, and then This can be easily carried out by introducing a vehicle between blocks and jacking it down.

On the other hand, the block transported to the installation position by the vehicle 15 is temporarily placed on a temporary pedestal 30 as shown in FIGS. 15 and 16, and the vehicle is pulled out from under the block.

Next, a vehicle loaded with a lifting device is placed under the furnace body 1 from a direction perpendicular to the furnace center line, and the vehicle is transported and lifted up to the concrete frame.

FIG. 17 and FIG. 18 show an example of this, and the lifting device consists of a base 31, a lifting guide mask 32, a supporting column 33, a lifting beam 34, and a furnace support saddle 35. It has a built-in guide rail and screw type or hydraulic lifting device for raising and lowering the beam 34.

When the lifting devices are assembled on the vehicle, the connecting members 36 and 37 firmly connect the lifting devices and the vehicles.

The block lifted from the temporary pedestal 30 by the lifting device is carried by a vehicle to the installation position from a direction perpendicular to the line,
The vehicle is lifted higher in front of the concrete frame as shown in Figures 17 and 18, and the vehicle gradually moves forward while aligning itself, adjusting the level and slope, and then lowering the lifting device to lower the vehicle as shown in Figure 19. And as shown in FIG. 20, the bearing stand 1
3 is fixed on the concrete frame 8, and the vehicle is removed together with the lifting device.

In this example, the case where the bearing pedestal is fixed to the support saddle and the band common furnace body and transported together is explained, but the rollers, roller bearings, and bearing pedestal are transported separately and adjusted and assembled on the concrete frame in advance. It is also possible to carry out a method in which a furnace body with tires is lifted and erected thereon as in this embodiment.

As explained above, according to the method for transporting and installing a horizontal rotary furnace according to the present invention, the number of divisions of the furnace body is minimized, each part is assembled into a large block, the trial run adjustment is completed, the transport is carried out as a whole, and the jack is brought down as is. Since most of the assembly, welding, and other work at the installation site can be completed within the factory, personnel costs, equipment costs, and transport, storage, and management costs can be reduced.

In particular, reducing and simplifying on-site welding work will ensure shorter construction times, quality assurance, and lower costs.

[Brief explanation of drawings]

Figure 1 is a front view of a horizontal rotary furnace transported and installed by the conventional method, Figure 2 is a front view of a horizontal rotary furnace transported and installed by the method of the present invention, and Figure 3 is a view of Figure 2 in the direction of the arrow. FIG. 4 is a front view showing the transportation state of a large block in the method of the present invention, FIG. 5 is a side view of FIG. 4, and FIG. 6 is an embodiment of FIG. 4. 7 is a side view of FIG. 6, FIG. 8 is a front view of another large block transported in the method of the present invention, and FIG. 9 is a front view showing an example in which the position and shape of the support saddle are changed. is a side view taken along the line B-B in FIG. 8, FIG. 10 is a front view showing vehicle rearrangement during transportation in the method of the present invention, and FIG. 11 is a side view of FIG. 10.
Figures 12a and 12b are plan views showing the procedure for transporting to the installation position;
FIG. 13 is a front view showing the transportation state of the large block of another embodiment, FIG. 14 is a side view of FIG. 13, FIG. 15 is a front view of the temporarily placed state, and FIG. 16 is a side view of FIG. 15. , Fig. 17 is a front view of the block being lifted and transported by a lifting device, Fig. 18 is a side view taken from the direction of arrow C-C in Fig. 17, Fig. 19 is a front view of the block when it is jacked down to a concrete foundation, Fig. 20 The figure is a side view of FIG. 19. 1...Furnace body, 2...Support tire, 3.
Curved/support roller, 4...Roller bearing, ? ',
8', 9'...Curved frame, 10...Support saddle,
13...Bearing stand, 15...Curved transportation vehicle, 16...
...Large gear, 17...Reduction gear, 18...
- Drive electric motor, 19...transportation frame.

Claims (1)

[Claims] 1. After assembling and fixing the long furnace body, drive device, rotation device, and support device together on a steel support frame by welding the adjacent body parts in advance, 1. A method for transporting and installing a horizontal rotary furnace, characterized in that the support frame is transported to an installation position using an arranged transport vehicle, and the support frame is installed and fixed on a foundation.