KR20040028130A - Method of manufacturing a air way pipe - Google Patents

Abstract

PURPOSE: A manufacturing method of airway pipe is provided which reduces manufacturing cost by roll forming welding both ends of the steel sheet in a cylindrical shape after perforating a plurality of air guiding holes on a steel sheet, thereby lowering fabrication cost and improving workability. CONSTITUTION: The manufacturing method of airway pipe comprises first step of mounting a coiled steel sheet on a uncoiler; second step of transferring the steel sheet to a high speed perforating press as peeling off the surface of the steel sheet; third step of forming a plurality of air guiding holes on the steel sheet by operating the high speed perforating press; fourth step of coiling the air guiding hole formed steel sheet again if the third step is completed; fifth step of transferring the steel sheet to a circular roll forming machine in the state that the steel sheet coiled in the fourth step is again mounted on the uncoiler; sixth step of welding fixing both ends of the steel sheet to each other by operating the circular roll forming machine; eighth step of secondly cutting again the cylindrical steel sheet cut to 5.4 to 6.0 m to 2.7 to 3.0 m after seventh step of first cutting a cylindrical steel sheet discharged from the circular roll forming machine to 5.4 to 6.0 m; and ninth step of completing an airway pipe by pressing one end of the cylindrical steel sheet using a pressing press to prevent air from leaking through an one end of the cylindrical steel sheet cut in the eighth step.

Description

Method of manufacturing a air way pipe

The present invention relates to a method of manufacturing an airway pipe for guiding air in a grain drying apparatus, and more specifically, by drilling a plurality of air guide holes on a steel plate, roll forming and welding both ends in a cylindrical shape, lowering the manufacturing cost and manufacturability It relates to a method for manufacturing an airway pipe that can reduce the manufacturing cost by improving the.

In general, grains such as rice and barley harvested from the mountain region are required to be dried for storage and transportation until reaching the consumer. This is because grains such as rice and barley harvested from the mountain region have too much moisture to be stored and transported without damage. That is, grains such as rice and barley harvested from the mountain region have a water content of about 20 to 30%, and grains having such water content are difficult to store because they are easily deteriorated during storage for storage.

The moisture content of grains such as rice and barley is one of the important factors that influence the taste, and is also very important in maintaining the quality and preventing the occurrence of insects. However, when rice is cooked with rice or barley having a moisture content of more than the desired value, the internal starch is eluted and the original shape of the rice grains is not retained as it is, and the taste is greatly reduced. Therefore, grains such as rice and barley harvested from mountain areas should be dried to have a moisture content of about 14 to 15.5% for safe storage, transportation and preservation of food before delivery to consumers.

Recently, various types of grain drying apparatuses have been widely used for proper food preservation. The grain drying apparatus cylindrical body, the roof structure covering the open top of the cylindrical body, the grain discharge screw device disposed on the inner lower portion of the cylindrical body, the bucket elevator vertically disposed outside the cylindrical body and the bottom type disposed below the bucket elevator Includes grain feeders. In addition, the grain drying apparatus is a grain input screw device disposed on the upper portion of the cylindrical body, the distributor, a dry storage room for storing grain, an auxiliary heat source and blower for generating dry hot air, agitating for stirring the grain stored in the dry storage room A control device for controlling the overall operation of the device and the grain storage device. At this time, a bottom plate formed of a perforated network is disposed below the dry storage chamber, and a plurality of airway pipes disposed radially while maintaining a predetermined interval are installed at the edge of the bottom plate. The airway pipe is fixed to the wall surface of the body by a fixing ring while a plurality of air guide holes are formed. In order to manufacture the above airway pipe, 2.3t of white pipe 25A was purchased and cut appropriately, and the copper part was pressed to prevent the discharge of air, and the air guide hole having a diameter of 2.2 was drilled at intervals of 30 pitches on the left and right sides of the pipe. .

However, since the diameter of the air guide hole is too small in the above-described airway pipe, the operator cannot drill the drill using a manual drill. There was a problem that the drill is frequently broken during the drilling work.

The present invention has been made to solve the conventional problems as described above, the object of the present invention by drilling a plurality of air guide holes on the iron plate, both ends of the cylindrical roll forming welding, lowering the manufacturing cost and improving the manufacturability The present invention provides a method for manufacturing an airway pipe that can reduce manufacturing costs.

In order to achieve the object of the present invention as described above, the present invention,

Mounting the wound iron plate to the uncoiler;

Peeling off the iron plate and transferring it to the high-speed punching press side;

Operating a high speed perforation press to form a plurality of air guide holes;

When the step is completed, winding up the iron plate formed air guide hole again;

Transferring the iron plate wound in the above step to the circular roll forming machine in a state where it is mounted on the uncoiler again;

Operating a circular roll forming machine to weld-fix both ends of the iron plate to each other;

First cutting the cylindrical iron sheet discharged from the circular roll forming machine to 5.4 to 6.0 m, and then secondly cutting the 5.4 to 6.0 m cylindrical iron sheet to 2.7 m to 3.0 m; And

In order to prevent the leakage of air to one end of the cylindrical iron plate cut in the above step provides a method for producing an airway pipe comprising the step of pressing the end by using a pressurized press.

Preferably, the iron sheet adopts a hot dip galvanized steel sheet Gi having a thickness of 2.3 t and a width of 82.5 mm.

More preferably, the air guide holes have a diameter of 2,2 mm, and the centers of the air guide holes are formed in a plurality of rows continuously at intervals of 30 mm while being positioned at 20.625 mm inwardly from one end and the other end of the iron plate. .

As described above, according to the present invention, by forming a plurality of air guide holes on the iron plate and then roll forming and welding both ends in a cylindrical shape, it is possible to reduce the manufacturing cost and improve the manufacturability to reduce the manufacturing cost.

Hereinafter, a method of manufacturing an airway pipe according to an exemplary embodiment of the present invention will be described.

In order to produce airway pipes that guide air to prevent condensation caused by temperature differences between the interior and exterior of the grain storage room, a plurality of radially disposed at the bottom edge of the grain storage room in the grain drying apparatus (not shown) Is mounted on the uncoiler (step S1). At this time, the wound iron sheet adopts a hot dip galvanized steel sheet Gi having a thickness of 2.3t and a width of 82.5mm.

When the wound iron plate is mounted on the uncoiler (step S1), the iron plate is peeled off and transferred to the high speed punching press side (step S2), and then the high speed punching press is operated to form a plurality of air guide holes (step S3). . At this time, the diameter of the air guide hole is 2,2mm, the center of the air guide hole is formed continuously at intervals of 30mm pitch while being located at 20.625mm inward from one end and the other end side of the iron plate. That is, the air guide hole is formed with a plurality of rows along the iron plate.

As described above, when a plurality of air guide holes are formed in the iron plate (step S3), the iron plate on which the air guide holes are formed is wound again (step S4). The iron plate thus wound is transferred to the circular roll forming machine side under the state of being mounted on the uncoiler again (step S5), and then the two ends of the iron plates are welded and fixed to each other by operating the circular roll forming machine (step S6). At this time, as both ends of the iron plate is welded and fixed, the iron plate has a cylindrical shape, and the air guide holes perforated in a plurality of rows are disposed to face each other in a radial direction.

When both ends of the iron plate are welded and fixed, the cylindrical plate (step S6) is first cut to the cylindrical iron plate discharged from the circular roll forming machine to 5.4 to 6.0 m (step S7), and then again to the 5.4 to 6.0 m cylindrical iron plate. Is cut second to 2.7 m or 3.0 m (step S8). One end of the secondary cut cylindrical iron plate in this way is pressurized with a pressure press to prevent air leakage to complete the airway pipe (step S9).

As described above, the airway pipe according to the present invention by using a high-speed punching press to form a drill operation, which is essential to the conventional air guide hole, it is possible to prevent the safety accident of the operator as well as processing time And there is an advantage that can reduce the manufacturing cost.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the invention described in the claims. You will understand.

Claims (3)

Mounting the wound iron plate on the uncoiler (S1); Peeling the iron plate and transferring to the high-speed punching press side (S2); Operating the high speed perforation press to form a plurality of air guide holes (S3); When the step (S3) is completed, the step of winding again the iron plate formed with the air guide hole (S4); Transferring the iron plate wound in the step (S4) to the circular roll molding machine in a state of mounting the iron plate again to the uncoiler (S5); Step (S6) welding the both ends of the iron plate to each other by operating the circular roll forming machine; First cutting the cylindrical iron plate discharged from the circular roll forming machine to 5.4 to 6.0 m (S7), and then secondly cutting the cylindrical iron plate of 5.4 to 6.0 m to 2.7 m to 3.0 m (S8); And In order to prevent air from leaking to one end of the cylindrical iron plate cut in the step (S8) of the airway pipe comprising a step (S9) of pressing the end by using a pressure press to complete the airway pipe Manufacturing method. The method of claim 1, wherein the wound iron sheet in the step (S1) is a hot-dip galvanized steel sheet (Gi) of 2.3t thick, 82.5mm wide. According to claim 1, wherein the air guide hole in the step (S3) has a diameter of 2,2mm, the center of the air guide hole is located at 20.625mm inward from one end and the other end side of the iron plate pitch A method of manufacturing an airway pipe, characterized in that formed in a plurality of rows in succession at intervals of 30 mm.