JP2017088206A - Silo inner wall surface lining method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a silo inner wall surface lining method capable of reducing a repairing labor.SOLUTION: At first, a laser irradiation device is disposed at an intersection part of an inlet cover arranged in a silo, and a laser beam is applied in a horizontal line on the internal surface (Step S101). Subsequently, there is assembled (Step S102) an annular foothold along the internal surface at the height of the highest part of the inlet cover. Subsequently, the horizontal line is made into a reference line, or the reference line is printed at a position spaced by a constant distance from the horizontal line, and a plurality of lining plates are arranged in the inner circumferential direction while conforming the upper end of the lining plate to that reference line (Step S107). Next, a second step is formed (Step S108) over a first step by arranging a plurality of sheets of lining plates in an inner peripheral direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a silo inner wall surface lining method in which a lining material is disposed on an inner wall surface of a silo.

  As a silo for grains, for example, a substantially cone-shaped hopper having a diameter of about 5 m to 10 m and a height of about 20 m to 40 m and inclined inward toward the lower end of a substantially cylindrical peripheral wall portion is provided. It is known that the inner wall surface of the hopper is coated to improve grain slip. However, since the coating applied to the inner wall surface of the inclined portion is peeled off as it is used, the grain slippage becomes worse. As a result, the grains are jammed without falling down, and in some cases, the grains jammed at the upper side fall down at a stroke, which is dangerous. For this reason, conventionally, for example, repairs have been periodically performed to repaint. However, the repainting work takes time and is difficult because it requires regular repairs. Therefore, development of a new method capable of reducing repair work has been desired.

JP-A-9-99485

  This invention is made | formed based on such a problem, and it aims at providing the silo inner wall surface lining method which can reduce the effort of repair.

  In Patent Document 1, a molded plate having a shape along the inner wall surface of the silo is partially bonded with a gap between the inner wall surface of the silo, and adjacent molded plates are joined together, and then molded. A silo inner lining method is described in which a gap between a plate and an inner wall is filled with an injection. However, the specific configuration of the present invention and the method described in Patent Document 1 are different.

  In the silo inner wall surface lining method of the present invention, a plurality of flat lining plates are arranged on the inner wall surface of the silo, and a laser irradiator is installed at the intersection of the inlet cover arranged in the silo. In the horizontal line scoring process of irradiating the inner wall with laser light to mark the horizontal line, and at the height of the top of the inlet cover, a gap is made between the inner wall and one round along the inner wall. Annular scaffold assembly process for constructing an annular scaffold and the horizontal line as a reference line, or a reference line is marked at a certain distance from the horizontal line, and the upper end of the lining plate is aligned with this reference line, and the inner circumferential direction After the first-stage arrangement process, which forms the first stage by arranging a plurality of lining plates, and the first-stage arrangement process, a plurality of sheets are arranged in the inner circumferential direction on the basis of the reference line. Rai It is intended to include a second stage arranged to form a second stage by disposing the ring plate.

  According to the present invention, a horizontal line is marked on the inner wall surface of the silo, and a plurality of flat lining plates are arranged on the basis of the horizontal line, so that the lining plates can be arranged without gaps. it can. Therefore, it is possible to improve the sliding of storage objects such as grains, and since the lining plate is used, the durability can be improved as compared with painting, and the labor for repair can be reduced.

  Also, in the first stage arrangement process, the lining plate is arranged from the joint portion between the inlet cover and the inner wall surface, and at the joint portion, the deviation of the shape from the guide plate is measured by applying the guide plate to the joint portion, If the lining plate is processed based on this, the lining plate can be more easily disposed without a gap.

  Furthermore, in the first stage arrangement process, the upper end surface of the lining plate is processed so as to be inclined downward from the outer peripheral side toward the inner peripheral side. In the second stage arrangement process, the lower end surface of the lining plate is If the product is processed so as to incline downward from the side toward the inner peripheral side, and the second lower end surface is aligned with the upper end surface of the first step, the storage items such as grains are the first step. It is possible to suppress being caught at the boundary with the second stage.

  In addition, if the sheet is stretched over the area to be lined in the silo and the lining area and the area above it are separated before the first stage installation process, the repair of the already used silo can be repaired. When performing, it can suppress that the lump of solids, such as grain, and dust fall from the upper part.

It is a flowchart showing the process of the silo inner wall surface lining method which concerns on one embodiment of this invention. It is a figure showing the schematic structure of a silo. It is a figure showing 1 process of the silo inner wall surface lining method shown in FIG. FIG. 4 is a diagram illustrating a process following FIG. 3. FIG. 5 is a diagram illustrating a process following FIG. 4. It is a figure showing the process of following FIG. It is a figure showing the process of following FIG. It is a figure showing the process of following FIG. It is a figure showing the structure of the drilling member which makes a hole in a lining board. It is a figure showing the process of following FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a flowchart showing the steps of a silo inner wall surface lining method according to an embodiment of the present invention. FIG. 2 shows a schematic configuration of a silo in which a lining material is disposed on an inner wall surface by the silo inner wall surface lining method of the present embodiment. 3 to 8 and 10 show the respective steps in the silo inner wall surface lining method of the present embodiment. In the silo inner wall surface lining method according to the present embodiment, a plurality of flat lining plates 20 are disposed on the inner wall surface of the silo 10.

  The silo 10 includes, for example, a silo body 11 that stores storage items such as grains and processed products thereof, and air conditioning air supply means 12 that supplies air conditioning air to the silo body 11. The silo body 11 includes, for example, a substantially cylindrical peripheral wall portion 11A, a substantially conical hopper 11B that is continuous with the lower end of the peripheral wall portion 11A and is inclined downward, and an upper end portion of the peripheral wall portion 11A. It has a disk-shaped upper wall portion 11C. A discharge chute 13 for discharging the material to be stored out of the silo body 11 is formed at the lower end of the hopper 11B. Further, for example, an umbrella-shaped inlet cover 14 is provided in the middle of the hopper 11B, and the conditioned air from the conditioned air supply means 12 is supplied to the silo body 11 through the inlet cover 14. Yes. The inlet cover 14 has a shape in which two covers intersect with a cross in the same plane.

  This Embodiment demonstrates the case where the inner wall surface of the hopper 11B is repaired about the silo 10 currently used. First, for example, as shown in FIG. 3, a laser irradiator 30 is installed at the intersection of the inlet cover 14 disposed in the silo 10, and the inner wall surface of the hopper 11B is irradiated with the laser light L to generate a horizontal line. Is marked (step S101; horizontal line scoring step). Specifically, for example, the laser beam is irradiated onto the inner wall surface while rotating the direction in which the laser beam L is irradiated by the laser irradiator 30, and the worker traces the inner wall surface according to the irradiated laser beam L.

  Next, for example, as shown in FIG. 4, at the height of the uppermost portion of the inlet cover 14, a gap is formed between the inner cover and an annular scaffold 32 that goes around along the inner wall (step S <b> 102; Annular scaffold assembly process). Specifically, for example, after preparing the scaffold plate 32A divided into eight with a size slightly smaller than the inner diameter of the hopper 11B to be worked in advance, the scaffold plate 32A is connected to the inlet cover 14 with bolts and assembled into an annular shape, Support the key points with triangular brackets, evenly positioned from the inner wall. FIG. 4 is a view of the annular scaffold 32 as viewed from above.

  Subsequently, for example, as shown in FIG. 5, two angles 33A are passed to the annular scaffold 32, and a picket scaffold plate 33B is arranged therebetween to produce the central work floor 33 (step S103; creation of the central work floor). Process). It is preferable to spread and fix a flameproof sheet on the surface of the central work floor 33. FIG. 5 is a view of the center work floor 33 as viewed from above. Next, for example, as shown in FIG. 6, the sheet 34 is stretched on the area to be lined in the silo 10, and the lining area and the area above it are separated (step S <b> 104; ceiling sheet stretching process). Specifically, for example, a pole 35 is set up at the center of the hopper 11B, a plurality of frames 36 are spread from the pole 35 toward the inner wall surface, and a seat 34 is spread and stretched on the frame 36. The sheet 34 is preferably a flameproof sheet. Moreover, it is preferable that the edge part of the sheet | seat 34 is affixed and taped to an inner wall surface with a tape.

  Thereafter, for example, the inner wall surface of the hopper 11B is cleaned (step S105; inner wall surface cleaning step), and various wirings are performed (step S106; wiring step). Next, for example, as shown in FIG. 7, the horizontal line marked in the horizontal line scoring step (step S <b> 101) is used as the reference line SL, or the reference line SL is marked at a certain distance from the horizontal line. The first stage is formed by aligning the upper end of the lining plate 20 with the reference line SL and arranging a plurality of lining plates 20 in the inner circumferential direction (step S107; first stage arranging step). The lining plate 20 is preferably made of, for example, a synthetic resin, and more preferably made of a thermoplastic synthetic resin such as polyethylene, polypropylene, or a fluororesin, or a fiber reinforced plastic. The lining plate 20 is preferably formed in advance in a trapezoidal shape with the upper side longer than the lower side, for example, in accordance with the shape of the hopper 11B.

  Further, in the first stage disposing step (step S107), for example, it is preferable to dispose the lining plate 20 from a joint portion between the inlet cover 14 and the inner wall surface. For example, as shown in FIG. 8, a guide plate 37 indicating the position of the joint portion is used at the joint portion between the inlet cover 14 and the inner wall surface. It is preferable to measure and displace the shape of the plate 37 and to process and arrange the lining plate 20 based on the measurement. For example, in the case shown in FIG. 8, it is measured how far the points A, C, and D of the guide plate 37 are away from the joint, or how much the point B should be scraped. The guide plate 37 is aligned with the processing lining plate 20, the measured deviation of each point is marked, a processing line is drawn, and the processing line is cut and arranged along the processing line.

  After the processed lining plate 20 is disposed along the joint between the inlet cover 14 and the inner wall surface, the next lining plate 20 is disposed next to the lining plate 20. Specifically, for example, the upper end of the lining plate 20 to be arranged next is aligned with the reference line SL, and is arranged close to the already arranged lining plate 20. At this time, for example, when a gap is formed on the lower end side of the two lining plates 20, a part is cut and matched so that there is no gap in a state where the upper end of the lining plate 20 is aligned with the reference line SL. This is repeated in order to form the first stage. For example, when the silo 10 is made of a metal such as steel, the lining plate 20 is disposed by drilling a hole in the lining plate 20, inserting a stud bolt into this hole, and welding it to the inner wall surface. Tighten with nuts and fix.

  When making a hole in the lining plate 20, for example, it is preferable to use a hole forming member 38 as shown in FIG. The drilling member 38 includes, for example, a countersunk hole 38B provided at the tip of the main body 38A, a screw hole drill 38C provided at the tip of the countersink 38B, and a depth provided around the main body 38A. Control unit 38D. The countersunk hole 38B is for forming the countersink 21, and the tapped hole 38C is for forming the tapped hole 22. By this, the countersink 21 and the tapped hole 22 are opened in one operation. Be able to. The depth control unit 38D limits the depth of the countersink 21. For example, when the hole is drilled in the lining plate 20 by the screw hole drilling part 38C and the countersink drilling part 38B, the depth control unit 38D The depth of the countersink 21 can be made constant when one end of 38D abuts against the lining plate 20.

  After arranging the first stage in this way, the second stage is formed by arranging a plurality of lining plates 20 in the inner circumferential direction on the first stage with reference line SL as a reference (step S108). The second stage arrangement step). As shown in FIG. 10, in the first step disposing step (step S107), the upper end surface of the lining plate 20 is processed so as to be inclined downward from the outer peripheral side toward the inner peripheral side. In the eye arrangement step (step S108), the lower end surface of the lining plate 20 is processed so as to be inclined downward from the outer peripheral side toward the inner peripheral side, and the lower end surface of the second step is aligned with the upper end surface of the first step. It is preferable to arrange them. It is because it can suppress that a to-be-stored item gets caught in the boundary of the 1st step and the 2nd step. The other lining plate 20 is disposed in the same manner as in the first stage. After the second stage is arranged, the third stage lining plate 20 is arranged on the second stage if necessary. Thereby, the inner wall surface of the hopper 11B is lined.

  As described above, according to the present embodiment, a horizontal line is marked on the inner wall surface of the silo 10, and a plurality of flat lining plates 20 are arranged based on the horizontal line. Can be disposed without gaps. Therefore, it is possible to improve the sliding of storage objects such as grains, and because the lining plate 20 is used, durability can be improved as compared with painting, and repair work can be reduced.

  Further, in the first stage disposing step (step S107), the lining plate 20 is disposed from the joint portion between the inlet cover 14 and the inner wall surface, and the guide plate 37 is applied to the joint portion from the guide plate 37 at the joint portion. If the deviation of the shape is measured and the lining plate 20 is processed based on the measured deviation, the lining plate 20 can be arranged more easily without a gap.

  Further, in the first stage arrangement process (step S107), a process in which the upper end surface of the lining plate 20 is processed so as to be inclined downward from the outer peripheral side toward the inner peripheral side is used, and the second stage arrangement process (step S108). Then, if the lower end surface of the lining plate 20 is processed so as to be inclined downward from the outer peripheral side toward the inner peripheral side, and the second lower end surface is aligned with the first upper end surface, It can suppress that stored things, such as grain, are caught on the boundary of the 1st step and the 2nd step.

  In addition, if the sheet 34 is stretched over the area to be lined in the silo 10 before the first stage disposing step (step S107) and the lining area is separated from the area above it, the sheet is already used. When repairing the silo 10 that is being repaired, it is possible to prevent the mass of stored objects such as grains and dust from falling from above.

  The present invention has been described with reference to the embodiment. However, the present invention is not limited to the above embodiment, and various modifications can be made. For example, in the above-described embodiment, the case of repairing the inner wall surface of the hopper 11B has been described for the silo 10 that has already been used. However, the silo inner wall surface lining method of the present invention is also used when a new silo 10 is made. Can do. In the above-described embodiment, each component has been specifically described. However, all the components may not be provided, and may be configured to have other structures.

  It can be used for lining the inner wall of a silo.

  DESCRIPTION OF SYMBOLS 10 ... Silo, 11 ... Silo main body, 11A ... Perimeter wall part, 11B ... Hopper, 11C ... Upper wall part, 12 ... Air-conditioning air supply means, 13 ... Discharge chute, 14 ... Inlet cover, 20 ... Lining board, 21 ... Countersink , 22 ... Screw hole, 30 ... Laser irradiator, 32 ... Annular scaffold, 32A ... Scaffold plate, 33 ... Center work floor, 33A ... Angle, 33B ... Picket scaffold plate, 34 ... Sheet, 35 ... Pole, 36 ... Skeleton 37 ... Guide plate, 38 ... Drilling member, 38A ... Main body, 38B ... Countersunk hole part, 38C ... Screw hole part, 38D ... Depth control part

Claims (4)

A silo inner wall surface lining method in which a plurality of flat lining plates are disposed on an inner wall surface of a silo,
A horizontal line marking process in which a laser irradiator is installed at the intersection of the inlet cover disposed in the silo, and a horizontal line is marked by irradiating the inner wall with laser light;
An annular scaffold assembling step of constructing an annular scaffold that makes a round along the inner wall surface with a gap between the inner wall surface at the height of the top of the inlet cover;
The horizontal line is used as a reference line, or a reference line is marked at a certain distance from the horizontal line, the upper end of the lining plate is aligned with the reference line, and a plurality of the lining plates are arranged in the inner circumferential direction. A first-stage arrangement step of forming the first stage by arranging;
After the first stage arrangement step, a second stage arrangement is formed by arranging a plurality of the lining plates in the inner circumferential direction on the first stage with the reference line as a reference. A silo inner wall surface lining method comprising the steps of:   In the first stage disposing step, the lining plate is disposed from the joint portion between the inlet cover and the inner wall surface. In the joint portion, a guide plate indicating the position of the joint portion is used, and the guide plate is The silo inner wall surface lining method according to claim 1, wherein the lining plate is processed and disposed based on a displacement of the shape between the joint and the guide plate applied to the joint. . In the first stage arrangement step, the upper end surface of the lining plate is processed so as to be inclined downward from the outer peripheral side toward the inner peripheral side,
In the second-stage arrangement step, the lower end surface of the lining plate is processed so as to be inclined downward from the outer peripheral side toward the inner peripheral side, and the lower end surface of the second step is aligned with the upper end surface of the first step. The silo inner wall surface lining method according to claim 1 or 2, wherein the silo inner wall surface lining method is provided.   2. The method according to claim 1, further comprising a ceiling sheet tensioning step of tensioning a sheet on an area to be lined in the silo and separating the lining area and the area above the lining area before the first stage disposing process. Item 4. The silo inner wall surface lining method according to any one of Item 3.

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