JPH0434661B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a turning method using a spraying method for lining materials such as urethane resin, and a mechanism design technology and control technology for automating the spraying work. This invention relates to an automatic silo inner wall surface lining device that sprays lining material by moving a spray gun in any direction during lining repair.

[Prior Art] Conventionally, the roller method has been commonly used for lining grain silos and the like. In this roller method, a worker rides on a gondola and holds a roller brush against the wall surface for a long period of time to apply the product.

[Problem that the invention seeks to solve]

In the conventional roller construction method as described above, confirmation of coating film quality depends on the judgment of employees because it is manual work, and special consideration must be taken to stabilize quality and construction efficiency is reduced. Unfortunately, the process involves applying only one layer a day, curing overnight, and then applying another layer the next day, which takes a considerable number of days, confines a large number of workers for a long period of time, and furthermore, it requires a lot of work inside the silo. Since the work involves long hours on the gondola, there are problems such as the need for safety measures against work at heights and long hours in closed spaces. The present invention aims to solve the above-mentioned problems, and improves construction speed.
The purpose of this invention is to provide an automatic silo inner wall lining device that reduces the number of workers and stabilizes construction quality.

[Means for solving problems]

To this end, the present invention is an automatic silo inner wall surface lining device that sprays a lining material onto the inner wall surface of a cylindrical silo using a spray gun, which comprises a gondola that moves up and down inside the silo, and a spray gun mounted on the gondola. A rotating mechanism installed so that the tip rotates along the inner wall surface of the silo, a gondola lifting device installed on the top slab in the silo to drive the gondola up and down, a material supply device that supplies lining material to the spray gun, and a spray gun. It is characterized by being equipped with a control device that controls a spray gun, a rotating mechanism, a gondola lifting device, and a material supply device so that the lining material is sprayed onto the inner wall surface of the silo through a combination of the rotating action of the gun and the lifting and lowering movements of the gondola. It is something to do.

[Effect]

The silo inner wall automatic lining device of the present invention includes:
A spray gun is attached to a gondola inside the silo, and the spray gun is rotated along the inner wall of the silo to raise the gondola by the spraying width each time it sprays one revolution, and the same operation is repeated.
For this purpose, a rotating mechanism was installed on the gondola. In this case, the gondola is equipped with a minimum amount of equipment, and the gondola lifting device, material supply device, control device, etc. are installed on the top slab of the silo. Therefore, there is no need to take measures such as staining due to spray mist and explosion-proofing, which are problems when these are installed in a silo. Furthermore, the load of the entire gondola can be reduced in weight, and the capacity of the gondola lifting device can also be small.

〔Example〕

Examples will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of one embodiment of the automatic silo inner wall lining device of the present invention, FIG. 2 is a plan view of the device shown in FIG.
The figure is a diagram for explaining the method of moving the spray gun using a rotating arm, Figure 4 is a diagram for explaining the method for moving the spray gun along the traveling rail using a hoist, and Figure 5 is a diagram for explaining the method of moving the spray gun along the traveling rail using a hoist. Figure 6 is a diagram to explain the operation of the spray gun and its control method. Figure 7 is a diagram showing the rotation speed curve of the gun moving device. Figure 8 is the operation of the spray gun. It is a figure showing a pattern. In the figure, 1 is a gondola lifting device, 2 is a detection hole, 3 is a control device,
4 is a manhole, 5 is an upper limit switch,
6 is an airless pump, 7 is a material tank, 8 is a top slab, 9 is an outer wall, 10 is a manual gun, 11
and 36 are spray guns, 12 is a swing arm, 13 is a swing motor, 14, 24 and 40 are gondola main beams,
15 is a guide roller, 16 is a lower limit
Switch, 17 is a hopper, 18 is a ventilation propeller/fan, 19 is a compressor, 20 is a gun holding part, 21 is a rotating shaft, 22 is a cylinder for arm extension/contraction, 22 is a handrail, 24 is a worm mechanism, 31
3 is a cover plate, 32 is a silo wall surface, 33 is a traveling rail, 34 is a traveling motor, 35 is a handle, 37 is an air hose for gun control, 38 is a material hose, 39 is a scaffold for inspection, 51 is an air hose, 5
2 indicates an elastic body, and 53 indicates an air cylinder.

In the automatic silo inner wall surface lining device shown in FIGS. 1 and 2, a gondola lifting device 1, a control device 3, and material supply devices such as an airless pump 6 and a material tank 7 are provided on a top slab 8, A gun moving device (swivel mechanism) such as a swing arm 12, a swing motor 13, a gun holding section 20, a spray gun 11, and a guide roller 15 are provided in a working gondola. The control device 3 provided on the top slab 8 performs overall control, the gondola is driven up and down by the gondola lifting device 1, and the lining material is supplied from the material supply device to the spray gun 11. In the working gondola, a swing arm 12 is driven by a swing motor 13, and a spray gun 11 held at the tip of the swing arm 12 swings along the inner wall surface of the silo.

The mechanism for moving the spray gun 11 is to attach the spray gun 11 to the tip of a rotating arm 12 having a rotating shaft at the center of the gondola as shown in FIG. 3, and to rotate the rotating arm 12 at a predetermined speed using a rotating motor 13. This is for moving the spray gun 11. Note that FIG. 3a is a view seen from above, and FIG. 3b is a view of FIG. 3a viewed from the side. However, the invention is not necessarily limited to this, and as shown in FIG. A spray gun 36 is attached to the device and the traveling motor 3 is operated at a predetermined speed.
4 may be driven to move the spray gun 36. In addition, Fig. 4b is A of Fig. 4a.
FIG. 4c is a view in the direction of the arrows of FIG. 4a.

During spraying work, to ensure the quality of spraying,
It is necessary to maintain a constant distance between the tip of the spray gun and the wall, and to do so, the guide roller 1
5 is provided. In the present invention, the spraying operation starts from the bottom of the silo and continues upward until it reaches the lower surface of the top slab 8. During this time,
Guide roller 15 due to the action of elastic body 52
In the state shown in FIG. 5a, the gondola is held on the wall so that the distance between the tip of the spray gun and the inner wall of the silo is kept constant. When the spraying operation is completed upon reaching the bottom surface of the top slab 8, it is necessary to lower the gondola downward before the paint film has solidified sufficiently.
In order to avoid damaging the paint film, air is supplied from the air hose 51 to the air cylinder 53 as shown in FIG. let Note that the upper limit switch 5 and lower limit switch 16 shown in FIG. 1 detect the upper limit position and lower limit position within the gondola silo.

During spraying work, it is necessary to maintain the moving speed of the spray gun at a predetermined speed in order to ensure the quality of the spraying.
Then, when the gun moving device increases the speed from the stop point A as shown in FIG. 6 and reaches a predetermined circumferential speed, the spray gun starts spraying from point B. and,
The spraying is stopped after going around the inner wall of the silo and reaching point C, and then decelerated and the moving device itself stops at point D. In other words, the circumferential speed of the spray gun increases from point A as shown in FIG. decelerate from When one round of spraying work is completed by controlling the circumferential speed in this way, the gondola lifting device is started, and the gondola is raised by a predetermined length and stopped, and the overlap width △ is set in a pattern as shown in FIG. Take W and start operating the gun moving device again. By rotating the gun in the opposite direction from the previous rotation, it is possible to prevent damage to the material hose or control air hose of the spray gun due to twisting or the like. In addition,
If you connect hoses, control cords, etc. between the gondola and the rotating mechanism using a rotating joint, etc.
The direction of rotation of the gun can remain in one direction. FIG. 9 is a diagram showing an example of a rotary joint used for connecting a hose, and FIG. 10 is a diagram showing an example of a rotary joint used for connecting a control cord. In the figure, 61 and 66 are hoses, 62 is a fixed pipe, 63 is a joint pipe, 64 is a rotating pipe, 65 is a gondola main beam, 67 is a sliding contact, 6
8 indicates fixed contacts. In the rotating joint shown in FIG. 9, the rotating pipe 64 is rotatably held, the fixed pipe 62 and the joint pipe 63 are screwed together, and these are fixed to the gondola main beam 65 and placed on the top slab. Connect the hose 61 from the installed device to the fixed pipe 62. On the other hand, a hose 66 on the rotating mechanism side to which a spray nozzle is attached is connected to the rotating pipe 64. In addition,
If there are a plurality of hoses to be connected, the rotary joint portion may have a concentric cylindrical structure (not shown), and the connection ports of the hoses may be pulled out from each one. In addition, in the rotating joint shown in FIG. 10, a circular fixed contact 68 is fixed to the gondola side, and a control cord from the equipment installed on the top slab is connected to this fixed contact 68, and the fixed contact 68 is fixed to the gondola side. Sliding contact 6 that slides on child 68
Connect the control cord of the swing mechanism to 7.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, construction management is improved by using an easy-to-operate automatic spraying device and optimally setting spraying specifications such as nozzle movement speed, discharge amount, and discharge pressure. It is easy to obtain a uniform and highly reliable lining coating film regardless of the quality of the worker. In addition, because the spraying speed is fast, it is possible to apply multiple layers in one day.
A predetermined coating thickness can be obtained in a short period of time. Furthermore, since a dedicated automatic machine is used, there is less manual work inside the silo, and only a small number of people are required to operate the equipment, resulting in a significant reduction in work man-hours. Since equipment is operated and managed on the slab, safety during construction can be improved. In particular, in terms of equipment configuration, equipment is placed outside the silo as much as possible, and some of the equipment installed inside the silo is made to be flameproof and explosion-proof, and is linked to a constant ventilation system. , ensuring the safety of the entire system.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of one embodiment of the automatic silo inner wall lining device of the present invention, FIG. 2 is a plan view of the device shown in FIG.
The figure is a diagram to explain the method of moving the spray gun with a rotating arm, Figure 4 is a diagram to explain the method of moving the spray gun with a hoist along the guard rail, and Figure 5 is a diagram to explain the method of moving the spray gun with a hoist along the guard rail. Figure 6 is a diagram to explain the operation of the spray gun and its control method, Figure 7 is a diagram showing the rotation speed curve of the gun moving device, and Figure 8 is a diagram to explain the operation of the spray gun. Figure 9 shows an example of a rotary joint used to connect a hose; Figure 10 shows an operation pattern;
The figure shows an example of a rotary joint used for connecting a control cord. DESCRIPTION OF SYMBOLS 1... Gondola lifting device, 2... Detection hole, 3... Control device, 4... Manhole, 5... Upper limit switch, 6... Airless pipe, 7... Material tank,
8...Top slab, 9...Outer wall, 10...Manual gun, 11 and 36...Spray gun, 12...Swivel arm,
13...Turning motor, 14, 24, 40 and 65...
Gondola main beam, 15...Guide roller, 16...
Lower limit switch, 17...Hopper, 18
...Ventilation propeller/fan, 19...Compressor, 20...Gun holder, 21...Rotating shaft, 22...Arm extension/contraction cylinder, 23...Handrail, 24...Worm mechanism, 31...Cover plate, 32...Silo wall, 33... Traveling rail, 34... Traveling motor, 35... Handle, 37... Air hose for gun control, 38... Material hose, 39... Scaffolding for inspection, 51
...Air hose, 52...Elastic body, 53...Air cylinder, 61 and 66...Hose, 62...Fixed pipe,
63...joint pipe, 64...rotating pipe,
67... Sliding contact, 68... Fixed contact.

Claims (1)

[Scope of Claims] 1. An automatic silo inner wall surface lining device for spraying lining material onto the inner wall surface of a cylindrical silo using a spray gun, comprising: a gondola that moves up and down inside the silo; and a spray gun mounted on the gondola. A rotating mechanism installed so that its tip rotates along the inner wall surface of the silo, a gondola lifting device installed on the top slab in the silo to drive the gondola up and down, a material supply device that supplies lining material to the spray gun, and It is characterized by being equipped with a control device that controls the spray gun, the rotating mechanism, the gondola lifting device, and the material supply device so that the lining material is sprayed onto the inner wall of the silo through a combination of the rotating action of the spray gun and the lifting and lowering movements of the gondola. An automatic lining device for the inner wall of a silo. 2. The silo inner wall automatic lining device according to claim 1, wherein the rotating mechanism has a rotating arm having a rotation axis at the center of the gondola, and a spray gun is attached to the tip of the rotating arm. . 3. The rotating mechanism has a trolley-like traveling device attached with a traveling rail that draws a circle along the inner wall surface of the silo, and a spray gun is attached to the traveling device. automatic lining device for the inner wall of a silo. 4. A patent characterized in that the control device controls the spray gun so that it starts spraying after the rotation speed of the rotation mechanism reaches a certain speed, and ends the spraying at a point that has rotated once from the starting point. A silo inner wall automatic lining device according to claim 1. 5. The automatic silo inner wall surface lining device according to claim 1, wherein the control device controls the rotating mechanism so as to reverse the rotating direction every time the spray gun performs one round of spraying.