JP7159602B2 - Falling object prevention device and method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a falling object prevention device and method capable of preventing falling objects adhering to the inner wall of a structure such as a boiler and/or falling of refractory materials on the inner wall and maintaining safety.

Clinker and the like, which are melted and solidified ash generated when waste is burned, adhere to the inner wall of the boiler of a waste incineration plant. If the deposits are left as they are, the heat recovery efficiency of the heat transfer tubes embedded in the inner wall of the boiler is lowered, and the exhaust gas passage is narrowed. Therefore, deposits must be removed periodically.

In addition, since the height of the boiler may be 5 m or more, scaffolding is built inside the boiler in order to remove deposits (see Patent Document 1). The same is true when repairing the inner wall of a boiler.

Under such circumstances, it is dangerous if deposits such as clinker or refractories on the inner wall (hereinafter referred to as deposits, etc.) fall while the workers are constructing the scaffold. Therefore, in order to prevent deposits and the like from falling, first, a ceiling is installed inside the boiler with scaffolding boards or the like, and then scaffolding is constructed under the ceiling. In addition, at construction sites, protective nets are stretched over workers to prevent deposits and the like from falling.

JP 2012-52305 A

However, in the falling object prevention method of installing the ceiling in the boiler with scaffolding boards, etc., although safety can be improved, there is a problem that it takes time and effort to install the ceiling and change the height of the ceiling. In addition, there is a danger that deposits and the like will fall until the installation of the ceiling is completed.

Furthermore, in the method of preventing falling objects by installing a protective net, there is a danger that attached objects may fall from the gap between the protective net and the inner wall of the structure, and the structure must be modified when the protective net is installed. , there was a problem that the vertical position of the protective net could not be determined arbitrarily.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a falling object prevention device and method capable of preventing the fall of deposits and the like adhering to the inside of a structure and maintaining safety. for the purpose.

In order to solve the above problems, one aspect of the present invention is a connection part connected to a rope lowered inside a structure, and a blower that keeps an inflated state when air is continuously blown in, and the air is blown by the blower. and a balloon body that deflates when stopped, wherein the falling object prevention device is configured to contact the inner wall of the structure in an inflated state suspended by the rope, In the falling object prevention device, the connecting portion is provided on the balloon body, and a protective sheet that contacts the inner wall of the structure is adhered around the balloon body.
Another aspect of the present invention is a connecting part connected to a rope that is lowered inside a structure, and a balloon body that maintains an inflated state when air is continuously blown by a blower and deflates when air blowing by the blower is stopped. and a falling object prevention device, wherein the falling object prevention device is configured to contact the inner wall of the structure in an inflated state suspended by the rope, and the central portion of the balloon body is The falling object prevention device is formed in a mesh-like or perforated shape so as to allow ventilation , and the balloon body is provided with air blowing ports on the upper and lower surfaces thereof, through which air is sent from the air blower .
Still another aspect of the present invention is a connecting portion connected to a rope lowered inside a structure, and a balloon that keeps inflated when air is continuously blown by a blower and deflates when air blowing by the blower is stopped. a main body, wherein the falling object prevention device is configured to contact the inner wall of the structure in an inflated state suspended by the rope; is a falling object prevention device that is formed in a mesh or perforated form so as to allow ventilation, and in which a rubber protective sheet that contacts the inner wall of the structure is provided around the fabric balloon body.
Still another aspect of the present invention is a connecting portion connected to a rope lowered inside a structure, and a balloon that keeps inflated when air is continuously blown by a blower and deflates when air blowing by the blower is stopped. a main body, wherein the falling object prevention device is configured to contact the inner wall of the structure in an inflated state suspended by the rope; and the balloon body is inflated. It is a falling object prevention device whose interior is partitioned by partition walls so that either a substantially circular shape or a substantially rectangular shape can be selected in a top view.

Still another aspect of the present invention is a balloon preparation step of preparing a balloon that maintains an inflated state when air is continuously blown by a blower and deflates when the blowing of air by the blower is stopped; and a rope lowered inside the structure. and a balloon contacting step of contacting the inflated balloon with the inner wall of the structure by continuously blowing air into the balloon with the blower, wherein the balloon is , a connection portion connected to the rope, and a balloon body that maintains an inflated state when air is continuously blown by the blower and deflates when air blowing by the blower is stopped, wherein the balloon body is connected to the rope. a protection device configured to contact an inner wall of the structure in an inflated state by being suspended from a balloon, the connecting portion being provided on the balloon body, and a protective device contacting the inner wall of the structure around the balloon body; It is a falling object prevention method in which a sheet is adhered .

ADVANTAGE OF THE INVENTION According to this invention, while preventing the attachment etc. which adhered to the inside of a structure falling, safety can be maintained.

1(a) is a side view and FIG. 1(b) is a top view) of the falling object prevention device according to the first embodiment of the present invention; FIG. FIG. 2A is a detailed view of a falling object prevention device according to a second embodiment of the present invention (FIG. 2A is a side view, and FIG. 2B is a top view); 1 is a process diagram of a method for preventing falling objects according to an embodiment of the present invention (a state in which a rope suspended inside a boiler is connected to a balloon as a device for preventing falling objects). FIG. It is process drawing (state in which the balloon was suspended inside the boiler) of the falling object prevention method of this embodiment. FIG. 4 is a process diagram (with the balloon inflated) of the falling object prevention method of the present embodiment. FIG. 4 is a process diagram (a bottom side perspective view of an inflated balloon) of the falling object prevention method of the present embodiment.

Hereinafter, a falling object prevention device and method according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the falling object protection apparatus and method of the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. The present embodiments are provided with the intention of allowing those skilled in the art to fully understand the invention through a thorough disclosure of the specification.
(Falling object prevention device of the first embodiment)

FIG. 1 is a detailed view of the balloon 5 (balloon 5 inflated state) as the falling object prevention device according to the first embodiment of the present invention. FIG. 1(a) is a side view, and FIG. 1(b) is a top view.

The balloon 5 includes a connecting portion 7 connected to a rope, a balloon main body 11, and a protective sheet 12 provided around the balloon main body 11. - 特許庁The balloon 5 is inflated inside a structure such as a boiler to prevent deposits and the like from falling.

The balloon main body 11 is made of cloth such as tarpaulin or chemical fiber fabric. The balloon body 11 maintains an inflated state when air is continuously blown by the blower, and deflates when air blowing by the blower is stopped. The airtightness of the balloon body 11 is lower than that made of rubber, and when the balloon body 11 is inflated, the amount of air sent by the blower and the amount of air leaking from the balloon body 11 are equal.

The protective sheet 12 has a rectangular frame shape and is attached to the periphery of the balloon body 11 by an adhesive or the like. The protective sheet 12 serves to improve the strength of the fabric balloon body 11 . The protective sheet 12 is made of rubber.

A ring-shaped partition wall 14 is provided inside the balloon body 11 . The balloon body 11 is partitioned into an inner compartment 5-1 and an outer compartment 5-2 by a partition wall 14. As shown in FIG. Air outlets 15a and 15b are provided on the upper and lower surfaces of the inner section 5-1, respectively. Air outlets 16a and 16b are also provided on the upper and lower surfaces of the outer section 5-2, respectively. When blowing air from the blower, the blower openings 15a or 15b, 16a or 16b on either the upper surface or the lower surface are used.

The inflated state of the balloon body 11 can be selected from either a substantially circular shape or a substantially rectangular shape when viewed from above. When air is blown into the inner section 5-1 of the balloon body 11, the balloon body 11 is inflated into a substantially circular shape. When air is blown into the outer section 5-2 of the balloon body 11, the balloon body 11 is inflated into a substantially rectangular shape.

The connecting portion 7 is provided on the upper surface of the balloon body 11 . The connection part 7 has a role of lifting the balloon body 11 with a rope. The plurality of connecting portions 7 are provided at regular intervals in the circumferential direction. The connection portion 7 is formed by forming a fabric into, for example, a ring shape. The rope 2 is connected to the connection portion 7 (see FIG. 4).

Reference numerals 18a and 18b are air holes. When the blower stops blowing air, the balloon body 11 deflates. However, the air is not completely discharged from the balloon main body 11 . Therefore, when the balloon 5 is folded, the air is discharged from the air holes 18a and 18b.

Numerals 21a and 21b are connecting means such as Velcro (registered trademark) (indicated by solid rectangles in the figure). When the balloon 5 has a substantially circular shape when viewed from above, air does not enter the outer section 5-2 of the balloon 5, so the outer section 5-2 of the balloon 5 slackens. In order to eliminate slack, the outer section 5-2 of the balloon 5 is folded inward, and the Velcro (registered trademark) 21b of the outer section 5-2 and the Velcro (registered trademark) 21a of the inner section 5-1 are joined. .

The balloon 5 of the first embodiment has the following effects. The balloon main body 11 maintains an inflated state when air is continuously sent by the blower, and deflates when the air blowing by the blower is stopped. It swells flexibly and adheres to unevenness. Therefore, even if there is a gap between the balloon body 11 and the inner wall of the boiler or the like, the gap is so small that it is possible to prevent deposits and the like from falling.

Also, since the protective sheet 12 made of rubber and brought into contact with the inner wall of the boiler is provided around the balloon body 11 made of fabric, the balloon body 11 made of fabric can be prevented from coming into contact with the inner wall of the boiler and breaking.

Furthermore, since the shape of the inflated balloon main body 11 can be selected from either a substantially circular shape or a substantially rectangular shape, the same balloon 5 can be used for both the circular inner wall and the rectangular inner wall of the structure. can be done.
(Falling object prevention device of the second embodiment)

FIG. 2 is a detailed view of the balloon 22 as a falling object prevention device according to the second embodiment of the present invention. In the second embodiment, the central portion 23a of the balloon body 23 is provided with, for example, a net. That is, the central portion 23a is formed in a mesh shape. Instead of forming a mesh, it can also be formed porous. The structures of the protective sheet 12, the partition wall 14, the air blowing ports 16a and 16b, and the Velcro (registered trademark) 21b are the same as in the first embodiment, so the same reference numerals are given and the description thereof is omitted.

According to the balloon 22 of the second embodiment, since the central portion 23a of the balloon body 23 is mesh-like or porous, ventilation is possible above and below the balloon 22, and the working environment below the balloon 22 is improved. can be made If it is impossible to ventilate, for example, the temperature of the working environment below the balloon 22 may rise, dust may scatter, or it may become dark.
(Falling object prevention method)

FIG. 3 is a vertical sectional view of a boiler to which the method for preventing falling objects according to one embodiment of the present invention is applied. The falling object prevention method of the present embodiment is performed before scaffolding is built inside the boiler 1, and prevents deposits and the like from falling on workers building the scaffolding.

As shown in FIG. 3, first, the balloon 5 is prepared (balloon preparation step). The balloon 5 is a balloon 5 that maintains an inflated state when air is continuously blown by a blower, and deflates when the blowing of air by the blower is stopped. At this stage, the balloon 5 is in a deflated and folded state.

Next, a rope 2 such as a master rope or a sling with a hook is inserted into the boiler 1 through the openings 1a and 1b at the top of the boiler 1. As shown in FIG. The upper part of the boiler 1 is provided with openings 1a and 1b for inspection, sensor insertion, and the like. The rope 2 is inserted using these openings 1a and 1b. Upper ends of the rope 2 on the side of the openings 1a and 1b are connected to fixing members 3a and 3b such as beams and handrails.

Next, the lower end of the rope 2 is pulled out of the boiler 1 through the manhole 1c on the side wall of the boiler 1. As shown in FIG. A side wall of the boiler 1 is provided with a manhole 1c for inspection and cleaning. The rope 2 is pulled out of the boiler 1 using this manhole 1c. A scaffolding 4 is installed outside the boiler 1 for workers to enter and exit the manhole 1c. When pulling out the rope 2, this scaffold 4 is used.

Next, the rope 2 is connected to the folded balloon 5 , and the duct 6 is connected to the balloon 5 . Then, the folded balloon 5 is put into the boiler 1 through the manhole 1c, and the balloon 5 is hung from the rope 2 (balloon hanging process). Since the balloon 5 in the folded state has a small volume, it can pass through the manhole 1c.

FIG. 4 is a top perspective view of the balloon 5 suspended inside the boiler 1. FIG. As shown in FIG. 4 , when the balloon 5 is put into the boiler 1 , the balloon 5 spreads evenly within the boiler 1 . 2 is a rope and 5 is a balloon. However, the balloon 5 is still deflated inside the boiler 1 .

A ring member 8 such as a ring catch or a ring hook is connected to the connecting portion 7 of the balloon 5 . A hook 2 a at the lower end of the rope 2 is detachably connected to the ring member 8 .

Next, as shown in FIG. 5, the blower 9 is turned on to send air through the duct 6 to the balloon 5 . Then, the balloon 5 is inflated and comes into contact with the inner wall 1d of the boiler 1 (balloon contact step). Here, when the blower 9 stops blowing air, the balloon 5 deflates. The blower 9 keeps blowing air into the balloon 5 so as to keep the balloon 5 inflated.

FIG. 6 is a bottom perspective view of the balloon 5 inside the boiler 1. FIG. 6 is a duct and 5 is a balloon. The inflated balloon 5 adheres to the inner wall 1 d of the boiler 1 . As mentioned above, the shape of the balloon 5 can be selected to be substantially circular or substantially rectangular. FIG. 6 shows an example in which the balloon 5 is substantially circular. As the balloon 5 is formed into a substantially circular shape, a loose portion 10 is generated around the balloon 5 .

As described above, the balloon 5 is used which maintains an inflated state when air is continuously blown by the blower 9 and deflates when air blowing by the blower 9 is stopped. 5 flexibly swells according to the unevenness and adheres to the unevenness. Therefore, an appropriate gap is created between the balloon 5 and the inner wall 1d of the boiler 1 in a state of high adhesion, and it is possible to prevent deposits and the like from falling through the gap. Furthermore, the volume of the balloon 5 is small when it is deflated, and its weight is also light, so the installation work is easy.

When changing the installation height of the balloon 5, the power supply of the blower 9 is turned off, and the air supply to the balloon 5 is stopped. Then, the balloon 5 deflates naturally. The height of the balloon 5 can be changed by raising and lowering the rope 2 while the balloon 5 is deflated. After the height adjustment of the balloon is completed, the power of the blower 9 should be turned on again.

When removing the balloon 5 from the boiler 1, the above procedure is reversed. That is, first, the power supply of the blower 9 is turned off, and the supply of air to the balloon 5 is stopped. Next, the deflated balloon 5 is taken out from the manhole 1c onto the scaffold 4. As shown in FIG. Then, the rope 2 and the duct 6 are removed from the balloon 5, the balloon 5 is folded on the scaffold 4, and the folded balloon 5 is stored in a storage bag. Finally, the rope 2 remaining in the boiler 1 is removed from the boiler 1.

Note that the present invention is not limited to being embodied in the above-described embodiments, and can be modified to other embodiments without changing the gist of the present invention.

For example, in the above-described embodiment, the balloon body is provided with partition walls so that the shape of the balloon body can be selected from either a substantially circular shape or a substantially rectangular shape. Only one of the substantially circular shape and the substantially rectangular shape may be used.

In the above embodiment, an example in which the balloon is installed in the boiler has been described, but the balloon can be installed in a desuperheating tower or any cylindrical structure in addition to the boiler.

1... Boiler (structure)
1d... Inner wall of boiler (structure) 2... Rope 5... Balloon 6... Duct 7... Connection part 9... Blower 11... Balloon main body 12... Protective sheet 14... Partition wall 22... Balloon 23... Balloon main body 23a... Central part of balloon

Claims (6)

a connection connected to a rope lowered inside the structure;
A falling object prevention device comprising: a balloon body that maintains an inflated state when air is continuously blown by a blower and deflates when air blowing by the blower is stopped,
The falling object prevention device is configured to contact the inner wall of the structure in an inflated state suspended by the rope,
The connecting portion is provided on the balloon body,
A falling object prevention device in which a protection sheet is adhered around the balloon body to contact the inner wall of the structure. 2. The falling object prevention device according to claim 1, wherein a protective sheet made of rubber is adhered around the balloon body made of cloth and is in contact with the inner wall of the structure. a connection connected to a rope lowered inside the structure;
A falling object prevention device comprising: a balloon body that maintains an inflated state when air is continuously blown by a blower and deflates when air blowing by the blower is stopped,
The falling object prevention device is configured to contact the inner wall of the structure in an inflated state suspended by the rope,
The central part of the balloon body is formed in a mesh or porous shape so as to allow ventilation ,
A device for preventing falling objects , wherein the upper and lower surfaces of the balloon body are provided with air blowing ports through which air is sent from the air blower . a connection connected to a rope lowered inside the structure;
A falling object prevention device comprising: a balloon body that maintains an inflated state when air is continuously blown by a blower and deflates when air blowing by the blower is stopped,
The falling object prevention device is configured to contact the inner wall of the structure in an inflated state suspended by the rope,
The central part of the balloon body is formed in a mesh or porous shape so as to allow ventilation ,
A falling object prevention device , wherein a protective sheet made of rubber that contacts the inner wall of the structure is provided around the balloon body made of cloth . a connection connected to a rope lowered inside the structure;
A falling object prevention device comprising: a balloon body that maintains an inflated state when air is continuously blown by a blower and deflates when air blowing by the blower is stopped,
The falling object prevention device is configured to contact the inner wall of the structure in an inflated state suspended by the rope,
A falling object prevention device in which the interior of the balloon body is partitioned by partition walls so that the inflated state of the balloon body can be selected from either a substantially circular shape or a substantially rectangular shape when viewed from above. a balloon preparation step of preparing a balloon that maintains an inflated state when air is continuously blown by a blower and deflates when air blowing by the blower is stopped;
a balloon hanging step of hanging the balloon on a rope lowered inside the structure;
a balloon contacting step of continuously sending air into the balloon by the blower to bring the inflated balloon into contact with the inner wall of the structure;
The balloon has a connecting portion connected to the rope;
a balloon body that maintains an inflated state when air is continuously blown by the blower and deflates when air blowing by the blower is stopped;
The balloon body is configured to contact the inner wall of the structure in an inflated state suspended by the rope,
The connecting portion is provided on the balloon body,
A method for preventing falling objects, in which a protective sheet that contacts the inner wall of the structure is adhered around the balloon body.

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