JPH0566043U - Furnace exchange type tow car - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a tow truck that is easy to mechanize repair work, has a short downtime for repairs, and is easy to slag. [Structure] Since both ends of the vessel part are detachably closed by blind plates, the refractory lining can be applied only to the vessel part, and new construction or repair work of the refractory of the vessel part can be separated from the trunnion part. To do. [Effect] The downtime for repair can be shortened by replacing the furnace body. Since both ends of the vessel part can be opened, the cooling time can be shortened, the working environment can be improved, the materials can be easily carried into the furnace, and the work can be easily mechanized.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tow truck equipped with a torpedo-type furnace body, which facilitates repair and dismantling work of refractory linings.

[0002]

[Prior Art]

 FIG. 6 is an overall view of a tow car according to the prior art, and shows, for example, the one described in the converter steelmaking method (Doi, Nikkan Kogyo Shimbun, 1966), pages 25-27. The torpedo car (1) is composed of a furnace body (2) and a carriage (3) including a supporting device, a tilting device, etc. The furnace body (2) includes a vessel part (5) and trunnion parts (4) at both ends. Is formed from. (18) is a furnace opening provided in the center of the furnace body (2) for receiving and discharging molten metal. FIG. 7 is an enlarged view of a connecting portion between the vessel portion (5) and the trunnion portion (4) of the above-mentioned conventional tow truck, both of which are integrated by welding. (6) is the refractory lining of the furnace body (2). There is a furnace opening only in the center of the furnace body, and all molten metal receiving, discharging, and repairing of refractory materials inside the furnace body (carrying out worn refractory materials, carrying in new refractory materials) are all carried out from this furnace mouth. ..

FIG. 8 shows an example of another conventional technique described in Japanese Utility Model Laid-Open No. 55-58651. In this example, the spigot portion (11) (FIG. 11) of the trunnion side flange (7) and the vessel side flange (8) provided with the vessel portion (5) and the trunnion portion (4) at their respective ends. (Refer to FIG. 3), and then they are removably connected by bolts or tightening fittings (9) to form a furnace body (2).

FIG. 9 shows an enlarged view of the joint portion of FIG. A method for repairing and dismantling the lining refractory material (6) in the case of another conventional towed car as shown in FIGS. 8 and 9 will be described below. In the other prior art tow car shown here, partial repair of the refractory lining during use before dismantling repair is performed in the same manner as the prior art tow car shown in FIG. It is carried out without separating it from the trunnion part (4). The reason is that both ends of the lining refractory (6) are inside the trunnion part (4), so if you forcibly separate it from the vessel part (5), both ends of the lining refractory (6) will be damaged. This is because even if they are sound, they must be partially dismantled. Then, since the sound lining refractory (6) is partially disassembled, disposed of, discarded and re-installed and dried again, labor, time and loss of refractory materials occur, which leads to improvement of working environment. This is because, comparing the advantages and disadvantages of the above, the costs are rather negative.

Next, when the refractory lining (6) is worn and dismantled to newly construct the refractory lining (6), even if the temperature of the refractory is high, the trunnion parts (4 ) Is pulled away from the vessel part (5) by a strong force, the exposed refractory material is dismantled, and openings are provided at both ends of the lining refractory material (6), which promotes ventilation in the furnace to that extent. There is an advantage that the cooling time of (6) is shortened. Furthermore, since a machine such as a belt conveyor can be used as a carry-in port for carrying in new refractory during the furnace construction work, the burden on the operator is less than when using only the furnace port (18) and the opening Due to the large amount of air pollution, improvement of ventilation inside the furnace has the desired effect of improving the working environment during furnace construction.

[0006] FIG. 10 shows an overall view of a mixed piggy wheel disclosed in, for example, Japanese Utility Model Laid-Open No. 59-178356 as another conventional technique. The furnace body (2) of the towing car (1) is formed only of the vessel portion (5), and both ends of the vessel portion (5) are directly supported by the carriage (3). The furnace opening (18) is provided in the center of the furnace body (2) as in the prior art. FIG. 11 is a partially enlarged view of the end portion of the vessel portion (5) of the mixed piggy wheel disclosed in Japanese Utility Model Laid-Open No. 60-24453, which is related to the above-mentioned other prior art, and is a blind plate (12). The end of the vessel portion (5) is detachably closed by the. Usually, blind plates (12) are arranged at both ends of the furnace body (2). Reference numeral (14) is a ring plate for attaching the blind plate (12), and is welded to the inside of the vessel portion (5) together with the reinforcing member (19). The blind plate (12) is detachably fixed to the ring plate (14) by a metal fitting (15) provided on the ring plate (14) and a fixing means (13) such as a cotter.

In another prior art tow truck shown in FIGS. 10 and 11, blind plates at both ends of the vessel portion (5) are provided for simple repairs that do not require dismantling of the refractory lining (6). Without removing (12), the work was carried out using the furnace opening (18) as a passage as in the case of the tow truck according to the prior art shown in FIG. Next, when the refractory lining (6) is worn and dismantled to construct a new refractory lining 6, the blind plates (12) at both ends are removed and the refractory in that part is partially dismantled. By providing openings at both ends of the refractory lining (6), the ventilation in the furnace is promoted, and the cooling time of the refractory (6) lining can be shortened. Since a machine such as a belt conveyor can be used as a carry-in entrance for the refractory, the burden on the operator is less than when only the furnace mouth (18) is used, and the ventilation in the furnace is improved due to the large number of openings. With this, desired effects such as improvement of working environment during furnace construction can be obtained.

[0008]

[Problems to be solved by the device]

 However, in order to prevent the temperature drop of the molten metal during transportation due to heat dissipation, the furnace opening of the conventional mixed-hot metal vehicle shown in FIGS. 6 and 7 was regulated to a size necessary for receiving the molten metal. .. For this reason, it is difficult to repair refractories in the furnace body, and measures have been required as so-called 3K work. Also, since there is only one furnace opening, not only does it take a long time to cool the refractory, but it also takes time and labor to bring in the refractory, which requires a long period of downtime for repairs. The occupancy rate was declining. For this reason, it was necessary to prepare a large number of torch cars, which required a large amount of equipment costs.

[0009] In another prior art mixed-hot metal vehicle shown in FIGS. 8 and 9, the furnace body can be divided into a vessel portion and a trunnion portion, but since the lining refractory is also applied to the trunnion portion. Forcibly separating the vessel from the vessel could damage both ends of the refractory lining. For this reason, as mentioned above, the negative factors that require repair and drying again are divided, which offsets the merits. Therefore, it was not possible to separate the refractory during its use. Also, since both ends of the refractory lining (6) could not be constructed until the vessel part (5) and trunnion part (4) were joined, the material was still loaded only into the furnace mouth (18). However, the work period in the furnace, which depends on ventilation in the furnace, was left for a long time. For this reason, the merits of the separation will be offset when considering the facility cost for separation and the labor, time and environment for the construction of the furnaces at both ends that are necessary again. .. Therefore, there is not much difference in use from the tow truck according to the prior art shown in FIG. 6 and FIG. 7, and similar repair problems were included.

Another prior art tow truck shown in FIGS. 10 and 11 has been proposed as one answer to the above-mentioned problems of the prior art, and is used for cooling, dismantling and refining lining refractory linings. Has the desired effect as described above. However, regarding partial repair during use, repair is still performed in the same manner as the conventional mixed metal tow car without exposing both ends of the vessel part. The reason for this is that if the refractories in the blind plates (12) at both ends are partially dismantled and openings are provided in the lining refractory (6), ventilation in the furnace is promoted to that extent, and Although it has the advantage of shortening the cooling time, on the other hand, the labor, time, and loss of refractory materials due to the partial dismantling of the healthy lining refractory (6) and re-installing and drying again. This is because comparing profits and losses results in negative costs rather than costs.

Further, when modifying an existing tow car according to the prior art, it was difficult to modify for the following reasons. In other words, since the diameter of the vessel part supported by the trolley after remodeling becomes large, the diameter of the furnace must be made smaller than before in order to keep the limit (especially height) dimension to avoid interference with surrounding obstacles. Didn't get For this reason, not only was the internal volume of the furnace reduced and the loaded weight decreased, but also the cost of remodeling became enormous, so remodeling could not be carried out easily. Also, since the end diameter of the furnace vessel is increased, it has the advantage of shortening the cooling time and being convenient for carrying in refractory, but on the other hand, the difference between the maximum furnace diameter and the refractory lining inside the furnace is reduced. Since the tendency toward the furnace mouth was smaller than before, slag could not be discharged sufficiently from the furnace. For this reason, the slag remaining in the furnace gradually increased, and this residual slag reduced the substantial volume of the furnace, resulting in a reduction in the loading weight.

[0012] As a result, the load must be reduced and the operation must be periodically stopped to clean the residual slag, resulting in the need for a larger number of towed cars than before, which requires additional equipment costs. Met. Furthermore, since the residual slag in the furnace hinders the refining reaction of the tow car in the furnace, the effect of refining work using the tow car was often insufficient. For this reason, additional refining work was required, and more processing costs were required, which was an operational burden. The object of the present invention is to make it possible to shorten the down period for inspecting and repairing the refractory as the furnace body exchange type while maintaining the advantage of the shape of the prior art tow truck. It is to provide a furnace-exchangeable mixed piggyback car.

[0013]

[Means for Solving the Problems]

 In order to solve these objects, the gist of the present invention is to provide a torpedo-type torpedo car having a torpedo-type furnace body and the trunnion part and the vessel part being separably connected. In the above, the furnace body exchange-type mixed piggy car is characterized in that blind plates having a structure capable of lining the refractory material are detachably provided at both ends of the vessel portion.

[0014]

[Action]

 It is possible to separate the repair furnace body by supporting the vessel part with a supporting device and then removing the fastening metal fittings that connect the vessel part and the trunnion part. Replacing the repair vessel and the new refractory with a newly constructed vessel and connecting them with the trunnion in the reverse order would result in a new vessel towed car, and the repair of the refractory was completed in a short time. The same effect can be obtained. By removing the blind plate at the end of the repair vessel placed on the support base, the cooling time can be shortened, and the load can be reduced by saving labor by using a conveyor for loading refractory materials. While enjoying the same effect as another conventional technique, the refractory material may be refilled and the replacement vessel part may be prepared by the time when the next vessel part is replaced.

[0015]

【Example】

 FIG. 1 shows an application example of the present invention. The towing car (1) is composed of a furnace body (2) and a trolley (3) including a supporting device, and the furnace body (2) has a trunnion portion (4) and a vessel portion (5) on a trunnion side flange. (7) and the flange (8) on the vessel side are connected to each other by a bolt or a clamp (9). (18) is a furnace opening provided in the center of the furnace body (2). FIG. 2 shows an enlarged cross-sectional view of the joint portion of the furnace body. Since an appropriate slope is machined on the outside of the trunnion side flange (7) and the bezel side flange (8), as the tightening metal fitting is tightened, it becomes wedge-shaped in the groove of the tightening metal fitting (9) over the entire circumference. It digs in and is tightly bound. A ring plate (14) is integrally welded to the end of the vessel portion (5), and a metal member (15) provided on the ring plate (14) is provided with a fixing means (13) such as a cotter. The blind plate (12) is detachably fixed. (6) is a refractory lining lined in the vessel part (5). Reference numeral (11) is a spigot portion provided on the trunnion side flange (7) and the vessel side flange (8) to prevent the center of the flange portion from being displaced. (19) is a reinforcing member for the ring plate (14). FIG. 3 is a perspective view of the fixed part of the blind plate (12) described above. FIG. 4 and FIG. 5 show a detent means for the joint portion of the furnace body. One or more protrusions (10) are provided in the groove of the tightening fitting (9), and a recess (16) is formed by penetrating around the trunnion side flange (7) and the vessel side flange (8). ), And constitutes a detent means (17).

Next, the repair / disassembly work of the refractory lining in the embodiment of the present invention will be described. First, when the lining refractory material (6) is not completely worn out, it is repaired in the middle of use by the same method as in the case of the conventional tow truck shown in FIG. Further, when the repair position in the furnace is far from the furnace opening (18) and the repair means does not come and go from the furnace opening, the following procedure is performed. That is, the vessel portion (5) is supported by means (not shown), and then the fastening metal fitting (9) is removed to release the coupling with the trunnion portion (4) supported by the carriage (3) to separate them. After that, the fixing means (13) such as a cotter shown in FIG. 3 is removed, and the blind plate (12) at the end of the vessel part (5) is removed, so that the end mirror part of the refractory lining (6) is removed. Since it is exposed, if this part is partially disassembled, an opening leading to the inside of the furnace can be provided. Depending on the content of the repair, repair work can be performed from this opening. This repair method is the same for a tow truck according to another conventional technique shown in FIG.

Next, when the refractory lining (6) is worn and dismantled, the vessel portion (5) is separated by the above-mentioned procedure, and then the separately prepared repaired vessel portion (5) is separated. The replacement of the towed car is completed by replacing it. The used vessel portion (5) with the removed worn lining refractory (6) is transferred to the refractory demolition site and then the end of the procedure described above without waiting for the refractory lining to cool. An opening will be provided in the section to serve as a ventilation port for promoting cooling. Subsequent new furnace construction work is performed in the same manner as in the case of another conventional tow truck shown in FIG.

[0018]

[Effect of the device]

 In the present invention, the shape of the trunnion portion and the vessel portion detachably configured is maintained in the furnace body profile of the conventional mixed metal car (see Fig. 6), while the shape of the vessel part is different from that of another conventional metal mixed car. Since the blind plate at the end is removable (see Fig. 10), the slope toward the furnace opening of the refractory lining in the furnace can be made to be about the same as that of the conventional mixed pig iron wheel so that the slag can be reliably removed from the furnace. Can be discharged to. Therefore, problems such as reduction of effective internal volume (reduction of loaded weight) due to residual slag in the furnace and increase of treatment cost due to inhibition of refining reaction are prevented.

Removing the blind plate at the end of the vessel portion increases the opening of the vessel portion. Therefore, the cooling time can be shortened, the environment for furnace construction work can be improved by promoting ventilation, and the mechanization of loading and unloading of refractory materials can save labor and shorten working time. By replacing the vessel part, it is possible to shorten the period of suspension of use of the tow truck for repairing refractory materials, thus increasing the apparent operating rate of the tow truck. For this reason, the number of tow trucks including trolleys can be small, which is economical. In addition, since the weight is lighter than when replacing the entire furnace body, a crane or other lifting machine is not only required to be small, but also the cost of manufacturing the vessel part prepared as a spare is low, which is economical. is there. The replaced used vessel part may be repaired off-line, so it is not directly related to the utilization rate of the towed car.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a part of an embodiment of the present invention,

FIG. 3 is a perspective view showing a part of the embodiment of the present invention shown in FIG.

FIG. 4 is a view showing a part of an embodiment of the present invention,

5 is a diagram showing a partial enlargement of the embodiment of the present invention shown in FIG.

FIG. 6 is a diagram showing an example of a conventional technique;

FIG. 7 is a diagram showing a part of the prior art shown in FIG. 6;

FIG. 8 is a diagram showing another prior art example;

9 is a diagram showing another prior art portion shown in FIG. 8;

FIG. 10 is a diagram showing another example of the prior art;

11 shows a partially enlarged view of another prior art shown in FIG.

[Explanation of symbols]

 1 mixed piggy car 2 furnace body 3 bogie 4 trunnion part 5 vessel part 6 lining refractory material 7 trunnion side flange 8 vessel side flange 9 tightening metal fitting 10 protrusion 11 inlay part 12 blind plate 13 fixing means 14 ring plate 15 metal object 16 recess 17 rotation Stopping means 18 Furnace mouth 19 Reinforcing member

Claims (1)

[Scope of utility model registration request] 1. A furnace body exchange type mixed piggy car comprising a torpedo type furnace body, wherein the furnace body is connected to a trunnion portion and a vessel portion so as to be separable. A furnace-replaceable mixed piggyback car, which is equipped with a blind plate that has a structure that allows for lining work.