JP6278581B1 - How to repair the inside of the silo - Google Patents

Abstract

When carrying out cleaning work or repair work inside a silo, the method of assembling a scaffold inside the silo requires a long construction period, high costs, and sufficient consideration for safety. A grain 50 stored in a silo 10 is used instead of a scaffold. After adjusting the storage amount of the grain 50 so that the worker can reach the place where the cleaning work or the repair work is performed, the upper surface of the grain 50 is leveled, and the sheet 30 is laid on the entire surface. By fixing the end to the inner wall surface 12 of the silo 10 with the adhesive tape 20 so that there is no gap, the space where the grain 50 exists and the work space 40 are divided by members 30 and 20 which do not allow air to pass through. To do. [Selection] Figure 1

Description

  The present invention relates to a method capable of safely and simply repairing the interior (ceiling and / or wall surface) of a silo.

  Silos that store grain, feed, etc. are made of concrete, steel plate, fiber reinforced plastic, and the like. Some silos are over 20 meters high. This silo can be considered to be internal dirt and accumulated dirt due to long-term use, or damage such as cracks due to aging deterioration of members. In order to cope with this, it is necessary to clean the inside of the silo or repair damage (such as cracks).

  In general, when cleaning or repairing the inside of a silo, in principle, all the grain stored in the silo is discharged. After that, a scaffolding made of logs or steel pipes will be installed inside the silo for work at high places. The worker uses the scaffold to clean and repair the interior of the silo. However, all of the inlets, outlets, inspection ports, etc. provided in the silo are usually small. Therefore, it is difficult to carry the scaffold assembled outside into the silo. Therefore, it is necessary to load and unload scaffolding members such as pipes into the silo and assemble and disassemble the scaffold within the silo. It takes a lot of time and effort to prepare and clean up.

  In order to shorten the time required for preparation for installation of the scaffolding and clean-up, Patent Document 1 discloses a dedicated work table that can be easily installed and removed. Patent Document 2 discloses a method in which a hollow body filler is placed in a silo, a work floor is constructed on the filler, and used for work at a high place or the like.

JP 2001-97479 A Japanese Patent Laid-Open No. 9-4213

  In the method disclosed in Patent Document 1, a dedicated work table must be prepared in advance. In addition, even in the method disclosed in Patent Document 2, a dedicated hollow body filler must be prepared. For this reason, all have the subject that the cost concerning preparation becomes high.

  In the present invention, a low-cost, easy, and short-time method for safely and simply repairing the interior of the silo (a method for setting a work space in the silo and then repairing the interior safely and simply ).

In order to achieve the above object, a method of repairing the work space provided in the silo of the present invention,
A method of setting a work space (40) for an operator to work inside a silo (10),
(I) adjusting the amount of grain (50) stored in the silo (10) so that the height of the upper surface of the grain (50) in the silo (10) is a height suitable for the work;
(Ii) dividing the space in which the grain (50) exists and the work space (40) so that there is no inflow or outflow of air;
(Iii) flattening the top surface of the grain (50) stored inside the silo (10) after adjusting the amount of the grain (50) and before partitioning the space;
It is characterized by including.

For example, a method for setting a work space inside the silo of the present invention is as follows.
A method of setting a work space (40) for an operator to work inside a silo (10),
(I) adjusting the amount of grain (50) stored in the silo (10) so that the height of the upper surface of the grain (50) in the silo (10) is a height suitable for the work;
(Ii) dividing the space in which the grain (50) exists and the work space (40) so that there is no inflow or outflow of air;
(Iv) After adjusting the amount of the grain (50) and before dividing the space, the upper surface of the grain (50) stored in the silo (10) is shaped to be inclined. Process,
It is characterized by including .

For example, the method of setting the work space inside the silo of the present invention can be a method of expanding the work space (40) downward as needed, for example, in an appropriate position depending on the progress of the work.

For example, the method for setting a work space inside the silo of the present invention is characterized in that the step of dividing the space includes a step of dividing by a flame-retardant or non-flammable member that does not allow air to pass through .

According to this invention, the height of the upper surface of the grain 50 in the silo is set to a height suitable for work, and the members are arranged. Therefore, it is possible to work on the member. Therefore, it is possible to perform the work inside the silo even without a scaffold for working at high places, and the work space can be set in the silo easily and in a short time at low cost.
In addition, there is little risk of tools and operators falling.

  Further, by adjusting the amount of the grain 50, the position of the work space can be adjusted, and the position can be easily adjusted. It is also possible to avoid work at high places.

  Further, the space where the grains 50 and the like exist and the work space are divided so that there is no inflow or outflow of air. For this reason, it is possible to prevent the contaminated material generated in the work space from contaminating the grain 50 and the like. The risk of dust explosion and fire due to dust generated from stored items can be suppressed.

Cross-sectional view of repair location for implementation of the present invention Sectional drawing which shows the silo inside concerning Embodiment 1 of this invention Sectional drawing which shows the inside of the silo upper part concerning Embodiment 1 of this invention. The figure showing the inside of the silo upper part which shows a part of process concerning Embodiment 1 of this invention. The figure showing the inside of the silo upper part which shows a part of process concerning Embodiment 1 of this invention. The figure which showed the state concerning Embodiment 1 of this invention, and the grain falls Sectional drawing which shows the inside of the silo upper part concerning Embodiment 2 of this invention. Sectional drawing which shows the silo inside concerning Embodiment 3 of this invention The figure showing the inside of the silo upper part concerning Embodiment 3 of this invention. The figure showing the inside of the silo upper part concerning Embodiment 3 of this invention. Drawing substitute photo showing the results of the work process at the site of the present invention

(Embodiment 1)
FIG. 2 is a cross-sectional view illustrating a state in which a work space is set inside the silo 10. On the ceiling 11 of the silo 10, there are disposed an inlet 14 through which stored items such as grain 50 and feed are introduced into the silo 10, and an inspection port 13 used for inspecting the inside of the silo 10. . A discharge port 16 for discharging the grain 50 and an inspection port 15 used for inspecting the lower portion of the silo 10 are arranged at the lower part of the silo 10. In the silo 10, for example, stored items such as grain 50 and feed are stored up to the top of the silo 10 except for the work space 40 described later, and the upper surface of the grain 50 is desirably flat. Naru Then, the sheet 30 is laid on the grain 50. Desirably, a floor board 62 is laid on the sheet 30.

  FIG. 3 shows details of the upper cross section of the silo 10. The grain 50 is stored in the silo 10, and the storage amount is suitable for setting the work space 40 in the upper part of the silo 10. That is, the height of the work space 40 is a height at which the hand or tool reaches the work target position when the worker stands on the sheet 30 laid on the grain 50.

  The upper surface of the grain 50 is leveled. The sheet 30 made of an air-impermeable member is laid on the grain 50 so as to cover the entire surface. The sheet 30 is formed of a material that is soft and foldable, like a normal sheet. In addition, the seat 30 is made of a material that has sufficient strength to allow an operator to stand and work on it, and has fire resistance that can withstand fire, incombustibility that does not burn, or flame resistance that is difficult to burn. Further, the sheet 30 is made of a material that is airtight and has high water resistance, oil resistance, solvent resistance, and chemical resistance so that the grain 50 can be protected by the sheet 30 even if the solution used in the work is spilled. Yes. Moreover, it is comprised from the raw material which does not generate | occur | produce toxic gas, when heated.

  The end of the sheet 30 is fixed to the wall surface 12 of the silo 10 with an adhesive tape 20 and the entire circumference is fixed.

  A plate material or the like is disposed on the sheet 30 as necessary.

  Next, a method for setting the work space 40 of FIG.

  First, at least safety measures for the silo 10 are taken in advance. Then, the site | part for cleaning or repair inside the silo 10 is extracted.

The safety measures in the silo 10 that are the least necessary are as follows. First, before the silo 10 enters the tank, be sure to ventilate the silo 10 with an explosion-proof fan, and measure the oxygen concentration and gas concentration when entering the tank to confirm that there is no abnormality. After entering the tank, the grain 50 is leveled in the silo 10, and then, at least two sheets of curing sheets 30 are stacked, and a scaffolding board is laid on the sheets. When sanding the groundwork, sand dust flies, so use an explosion-proof fan to provide sufficient ventilation, and the worker should use a dust mask.
In any case, when the body feels abnormal and / or abnormal, it immediately reports and / or exits the silo 10.

  Considering various situations, for example, the inner surface in the standing direction of the silo 10 is divided into a height of about 1500 mm to 2000 mm between the upper surface of the grain 50 and the ceiling. Each divided region is a space that is optimal for cleaning or repairing in one operation (a space for an optimal work target location), and such a method can also be performed as necessary.

  Further, the upper surface of the grain 50 is a place where the work is performed. For example, the grain 50 is discharged from the discharge port 16 of the silo 10 or charged so that the height is suitable for cleaning or repair. do. If the amount of grain 50 is too small for cleaning or repair (work target location), as shown in FIG. 6, the grain 50 is introduced from the inlet 14 to adjust the storage amount.

  After the adjustment of the storage amount of the grain 50 inside the silo 10 is completed, the worker who has entered the silo 10 smoothes the upper surface of the grain 50.

  Next, the sheet 30 (one to several sheets of the curing sheet 30) carried into the silo 10 from the inspection port 13 is laid on the top surface of the grain 50 as shown in FIG. The size of the sheet 30 is preferably a size that covers the entire upper surface of the grain 50, but even if the size is insufficient, the upper surface of the grain 50 is connected by, for example, an adhesive tape or the like so as not to allow air to pass. To cover.

  The periphery of the sheet 30 that covers the entire top surface of the grain 50 (at least, the uppermost curing sheet 30) or the end of the predetermined portion should be kept from passing air through the wall surface 12 of the silo 10 or, if necessary, appropriate. Is fixed with an adhesive tape 20. Preferably, the end of the sheet 30 is fixed to the wall surface 12 with the adhesive tape 20 without a gap over the entire circumference so that air does not flow in and out between the sheet 30 and the wall surface 12.

  Subsequently, as shown in FIG. 5 and the like, a floor board 62 is laid on the sheet 30. The floor board 62 stabilizes the operator's feet. Thereby, even when the grain 50 is flexible, it is a necessity for the worker to work stably. Considering the number of people, grain 50, etc., the number and location of the floorboard 62 is selected and laid according to the empirical rule (necessary for ensuring safe work).

  The location shown in FIG. 1 is a cross-sectional view of the repair location. The protection construction range (work space 40), which will be described later, or the tape 20 for mounting the curing sheet 30 is shown. Others indicate storages such as floor boards 62 and 66, grain 50, feed, and the like. An example of the crack or damage state and repair material (base repair) is shown. For example, the cracked portion is filled with a sealing material, and the floating portion and the reinforcing bar exposed portion are subjected to resin lining by applying mortar correction. Of course, there are changes depending on the customer's request, such as damage situation and economic efficiency.

  Thus, the work space 40 for one time is set.

  The worker performs work on the sheet 30 or the floor board 62 in the set work space 40 in the protection work range near the ceiling.

  Thus, although the work space 40 is between the upper surface of the grain 50 and the ceiling, in principle, the height is free. However, the work target location is set to a height suitable for work from the upper surface of the grain 50. Then, the upper surface of the grain 50 is leveled. Thereafter, the sheet 30 is laid so as to cover the entire upper surface of the leveled grain 50. In order to eliminate the gap between the sheet 30 and the wall surface 12, the end of the sheet 30 is fixed with the adhesive tape 20. A floor plate 62 is laid on the sheet 30 as necessary. In rare cases, when the work in the work space 40 set this time is completed, the work space 40 is newly set according to the plan. Specifically, the adhesive tape 20 is peeled off, and the grain 50 is discharged from, for example, the discharge port 16 shown in FIG. It is also possible to set a new work space 40.

  Thus, the next work space 40 is set. The worker processes the work target portion in the current belt area in the work space 40. Note that, as described above, depending on the progress of the work, a method of spreading the portion downward, for example, in an appropriate manner, for example, can be used as necessary. However, it is an exception and the necessity is not so much.

  As described above, the work space 40 and the space where the grain 50 exists are separated by the sheet 30 so that air does not flow in and out, so that the dirty substances generated in the work space 40 due to the cleaning work are removed. It is possible to prevent the grain 50 from being contaminated. It is possible to prevent the grain 50 from being contaminated by a solvent or the like used when repair work or the like is performed in the work space 40. There is no risk of dust explosion in the work space 40 due to dust generated from the grain 50. Since the spark that may be generated during the repair work in the work space 40 does not reach the grain 50, there is no possibility of a fire that burns the grain 50.

  Further, since what is carried into the silo 10 to set the work space 40 is the sheet 30, the adhesive tape 20, and the floor board 62 as necessary, a small amount of general-purpose members are prepared for work. Therefore, preparation costs and preparation time for cleaning or repair work are reduced.

  Furthermore, since work is performed on the seat 30 or the floor board 62 in the work space 40, work at high places is almost unnecessary. In addition, it is not necessary to take strict safety measures to prevent the operators and work tools from falling, which is required when the method of assembling the scaffold is adopted, that is, the danger itself is eliminated, so that safety is further increased. A simple work space.

(Embodiment 2)
The upper internal cross section of the silo 10 shown in FIG. 7 illustrates another embodiment of the present invention. The difference from the first embodiment is that the upper surface of the grain 50 is not flattened, but is formed into a slope shape and then the entire surface of the grain 50 is covered with the sheet 30. After that, the end of the sheet 30 and the wall surface 12 are fixed with the adhesive tape 20 so that there is no inflow / outflow of air as in the first embodiment.

  The present embodiment is effective when there are a plurality of work locations inside the silo 10 and the difference in height exceeds the reach of the worker. For example, when the situation is shown in FIG. 7, there is a work location A at the lower portion of the left wall surface 12, and at the same time, there is a work location B at the upper portion of the right wall surface 12. Because the difference in height is too large, it is impossible to work as the same work space, that is, if the upper surface of the grain 50 is set flat as in the first embodiment according to the work place A, the work place B This is effective in situations where workers do not reach.

  In this case, by setting the upper surface of the grain 50 at the place where the high work location B exists to be high in a slope shape, the worker can reach both the low work location A and the high work location B. In addition, shaping the upper surface of the grain 50 into a slope shape is an example.

(Embodiment 3)
In the said Embodiment 1-2, although the operator showed the example which works on the sheet | seat 30 or the floor board 62, even if it forms a scaffold on the basis of the sheet | seat 30 or the floor board 62, there is no problem.

  An example in which a scaffold is built in the silo 10 will be described below as a third embodiment. The internal cross-sectional shape of the silo 10 shown in FIG. 8 is effective when there is a work place on the ceiling 11 of the silo 10. Compared with the man-hour for adjusting the amount of the grain 50 and resetting the work space 40 again, it is effective when it is short-time and low-cost to carry and assemble a small amount of scaffold members.

  More specifically, for example, as shown in FIG. 9, a chain 67 attached to a pipe 64 is hung on a hook 63 attached to a ceiling 11 to stand the pipe 64 as a scaffold, and a floor board 66 is installed thereon. Therefore, it is necessary for the operator to reach the work location of the ceiling 11. It is a means for that. Further, instead of the chain 67, other suitable hanging tools such as a wire, a rope, and a hanging member can be used, and a simple method of directly attaching the pipe 64 to the hook 63 is also possible. Each hanging tool is beneficial if it can be adjusted in length.

  This method is lower in cost than the method of discharging all the grains 50 inside the silo 10 and assembling the scaffold from the lower part of the silo 10, and takes less time to carry in / out the scaffold member and to assemble / disassemble the scaffold member. Furthermore, since the position of the worker is not a dangerous height when viewed from the seat 30, a strict safety measure is not required as when working on a general scaffold.

  Further, when the work location in the upper part of the work space 40 is partial or separated and is not large enough to install a scaffold, the stepladder 69 is placed on the floor board 62 as shown in FIG. It can also be installed to increase the reach of workers.

  In the embodiment described so far, the space in which the work space 40 and the grain 50 exist is divided (partitioned) by the sheet 30 and the adhesive tape 20 that do not allow air to pass therethrough so that air does not flow in and out. However, instead of the sheet 30, a plate material having a size that can be folded and wound can be used. In that case, the board | plate material which is the member which the said board | plate material itself and those connection parts do not let air pass will be used. In addition, any member can be used as long as it is a member capable of distinguishing the work space 40 and the space where the grain 50 exists, and can be taken in and out from the inspection port 13 or the insertion port 14.

  Further, instead of the adhesive tape 20, an elastic member can be used as a packing between a plate material and a wall surface 12 having a shape and size adapted to the silo internal shape. Using this, it is also possible to divide the work space 40 (protective construction range) and the space where the grain 50 exists so that there is no inflow or outflow of air. In either case, the work space 40 and the space where the grain 50 is present are divided so that there is no air inflow and outflow, and are included in the scope of the present invention.

  In the above-described embodiment, the example in which the work space 40 is sequentially set from the upper part to the lower part of the silo 10 has been described. However, the setting of the position of the work space is arbitrary.

  For example, the work space 40 may be set only once.

  In addition, although a band-like area including a repaired part or a cleaning part is set, the height of the band-like area is arbitrary depending on the height of the operator, the size of the tool used, whether or not the second and third embodiments are adopted, etc. Can be set to a size of.

  Moreover, you may set the position of the upper surface of the grain 50 by a different method.

  The features brought about by the invention disclosed in claims 1 to 5 of the present invention will be described as follows.

  Temporary dismantling and inspection of construction sites are easy, so the business suspension period is minimized and the construction period can be shortened.

  In addition, since all workers work on the grain 50, there is no fear of people and objects flying and falling, and it is safe.

  And cost can be reduced. First, the materials used are inexpensive. Personnel with technical qualifications are not required and the number of vehicles and people is minimal, so labor costs can be reduced. In addition, since the amount of product in the silo that is moved for work is the minimum necessary, time and electricity costs can be reduced.

  Therefore, all the problems of the temporary scaffolding method can be solved.

  An example of a recent work performed by the inventor of the present applicant in the specific work order of the work of the present invention will be described in detail.

FIG. 11A is a bird's-eye view of a situation in which the base processing (V-cut, exploding part turning, and sanding) is performed. Scrub and expose the weak and deteriorated parts such as the part where the concrete part is raised due to rust corrosion of the reinforcing bars, the part where cracks are generated, etc. using a keren tool, chisel, chipper etc. Remove rust generated on the reinforcing bar using a wire tool, sander, jet kettle and other keren tools. (About 2 types of keren)
FIG. 11-2 is the most preferable method of exposing the internal reinforcing bars after the work, and is a method with little secular change after the repair, and is a situation after turning the ceiling portion, the wall portion, or the like.

  Fig. 11-3 shows the result of rust-proofing of the steel bars that had been thoroughly cleaned with compressed air, waste cloth, duster brush, etc., and that had been removed after scraping away the concrete fragments and dust. Is the situation.

  FIG. 11-4 shows a state in which an adhesive resin (emulsion) is applied and filled with polymer cement mortar after rust prevention treatment.

  FIG. 11-5 is a view showing a step correction process in which the surface of the mortar-filled portion is smoothly repaired with a trowel, a spatula, or the like, and the periphery thereof is sealed with a sealing material.

  FIG. 11-6 shows a situation where the put mortar is put together with a cloth to prevent the falling of the filled mortar and to secure a sufficient thickness.

Desirably, the ceiling and the side wall surfaces are provided with a lining for fall prevention in preparation for a concrete fall or the like that may occur in the future. Fig. 11-7-11-9 shows the situation where the entire surface was painted and finished in several steps after the foundation repair of the concrete curled portion and the like was completed.
The characteristics of the present invention are collectively as follows.
A. All workers are safe to work on grain.
B. There is no fear of people and objects flying and falling.
C. Because temporary dismantling is easy, the construction period is short.
D. Vehicles and people are minimal.
E. Since the amount of the product in the silo needs to be reduced to the minimum necessary for the work, the time, electricity cost, labor cost, etc. for that purpose can be reduced.
What. On the contrary, the time, electricity bill and labor cost for filling up the grain in the silo after construction is completed can be reduced.
G. No need for skilled workers, anyone can do it.
H. Since the construction period is short, the customer can minimize the period of business suspension as a business warehouse.
Li. Minimize the site and cost of storing materials. For example, the difference from when building a scaffold is clear.
Nu. The materials used are inexpensive.
Le. The working height can be changed by adjusting the grain height.
Wow. Inspection of construction site is easy.

  Each embodiment described above shows a preferable example, and other structures and means having similar effects and features are within the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Silo 11 Ceiling 12 Wall surface 13, 15 Inspection port 14 Input port 16 Outlet port 20 Adhesive tape 30 Sheet 40 Work space 50 Grain 50
61 Ladder 62, 66 Floor plate 63 Hook 64, 65, 68 Pipe 67 Chain 69 Stepladder

Claims (4)

A method of setting a work space (40) for an operator to work inside a silo (10),
(I) adjusting the amount of grain (50) stored in the silo (10) so that the height of the upper surface of the grain (50) in the silo (10) is a height suitable for the work;
(Ii) dividing the space in which the grain (50) exists and the work space (40) so that there is no inflow or outflow of air;
(Iii) flattening the top surface of the grain (50) stored inside the silo (10) after adjusting the amount of the grain (50) and before partitioning the space;
A method for setting a work space inside a silo, characterized by comprising: A method of setting a work space (40) for an operator to work inside a silo (10),
(I) adjusting the amount of grain (50) stored in the silo (10) so that the height of the upper surface of the grain (50) in the silo (10) is a height suitable for the work;
(Ii) dividing the space in which the grain (50) exists and the work space (40) so that there is no inflow or outflow of air;
(Iv) After adjusting the amount of the grain (50) and before dividing the space, the upper surface of the grain (50) stored in the silo (10) is shaped to be inclined. Process,
A method for setting a work space inside a silo, characterized by comprising : The method for setting a work space in a silo according to claim 1 or 2, characterized in that the work space (40) gradually expands downward as work progresses . The work space in the silo according to any one of claims 1 to 3, wherein the step of sorting comprises a step of sorting by a flame-retardant or non-flammable member that does not allow air to pass through. How to set.