JP2000356035A - Scaffold structure inside tower tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scaffold structure inside a tower tank whereby scaffolds can be easily assembled inside the tower tank. SOLUTION: This scaffold structure inside a tower tank has scaffold units 12 each of which includes columns 13 and scaffolding supports 16 freely foldably connected to the columns 13 via connecting metal fittings. The plurality of scaffold units 12 are combined by interconnection of the columns 13 and are installed in a tank 11. The scaffolding supports 16 are fixed to the inner surface of the tank 11 via press members 18 whose lengths are freely adjustable along the longitudinal direction of the supports 16. The columns 13 comprise pipes and are interconnected via connecting pipes 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffold structure inside a tower tank used for inspecting and repairing the inner surface of a tower tank, for example, a tank.

[0002]

2. Description of the Related Art Conventionally, a scaffold used for inspecting and repairing the inner surface of a tank constituting a chemical plant, for example, has been made of a steel pipe scaffolding material in a tank from a manhole at the top. They were brought in and assembled by hand by workers. Therefore, according to the conventional scaffold structure, both assembly and disassembly require time and effort.

[0003] Further, since the work is performed at a high place, there is a great danger for workers. According to Japanese Patent Application Laid-Open No. Hei 9-144302, an inspection / repair device for a tank inner surface provided with a work floor having at least three or more support points on the inner surface of the tank and means for suspending the work floor is proposed. ing. According to Japanese Patent Application Laid-Open No. Hei 9-144303, a pivotable work scaffold provided at the center of a tank has a telescopic scaffold that can be extended and contracted by being guided by a fixed scaffold, There has been proposed a device for inspecting and repairing the inner surface of a tank provided with an elevating device for causing the tank to rise.

[0004] Therefore, an object of the present invention is to provide a scaffold structure inside a tower tank in which a scaffold can be easily assembled inside the tower tank.

[0005]

According to a first aspect of the present invention, there is provided a scaffold structure in a tower tank, which comprises a support, and a support material for the scaffold, which is foldably connected to the support via a connection fitting. And a plurality of the scaffold units are installed in the tower tank in combination with each other by connecting the columns. The type of the tower tank is arbitrary, and includes, for example, a tank of a chemical plant.

[0006] When assembling the scaffold, the lower scaffold unit is placed inside the tower tank with the support of the scaffold closed, and the support is opened and set. Next, the scaffold unit corresponding to the upper stage of the lower scaffold unit is inserted into the tower tank with the support material closed, and the upper end of the column of the lower scaffold unit is connected to the lower end of the column of the upper scaffold unit.
Then, the support material of the upper scaffold unit is opened and the upper scaffold unit is set. Thereafter, a scaffold unit which is a further upper stage of the upper scaffold unit is set to provide a scaffold structure including a required number of scaffold units. According to the present invention, the scaffold units having an arbitrary height can be easily assembled by assembling the scaffold units in order from the lower tier to the upper tier, so that the inspection and repair of the inner surface of the tower can be facilitated.

A scaffold structure inside a tower tank according to a second invention of the present invention is the scaffold structure according to the first invention, wherein the supporting member for the scaffolding material is a pressing member whose length is adjustable in the longitudinal direction of the supporting member. And fixed to the inner surface of the tower tank via According to the present invention, since the length of the pressing member is adjustable, by adjusting the length, the supporting member can be reliably fixed to the inner surface of the tower tank. Become like

[0008] In the scaffold structure inside the tower tank according to a third invention of the present invention, in the second invention, the pressing member includes a bolt attached to the supporting member, and the pressing member includes the bolt. Is characterized in that its length is adjustable. According to the present invention, the above structure simplifies the structure of the pressing member.

A scaffold structure inside a tower tank according to a fourth invention of the present invention is the scaffold structure according to any one of the first to third inventions, wherein a plurality of support materials for the scaffold are provided radially with respect to the support. It is characterized by being. The number of the support materials of the scaffold is arbitrary, and for example, about 4 to 8 is appropriate.

A scaffold structure inside a tower tank according to a fifth invention of the present invention is the scaffold structure according to any one of the first to fourth inventions, wherein the struts are formed of pipes, and the struts are connected to each other via a connecting pipe. It is characterized by being performed. What is necessary is to prepare a connection pipe having a diameter larger than the support, and insert a pin or the like into the support and the connection pipe to fix them. This structure facilitates connection between the columns.

A scaffold structure inside a tower tank according to a sixth invention of the present invention is the scaffold structure according to any one of the first to fifth inventions, wherein the lowest scaffold unit of the plurality of scaffold units is connected via a leg member. It is characterized by being fixed to the inner surface of the tower tank. The number of the leg members is arbitrary as long as it is three or more. According to the present invention, since the lowermost scaffolding unit is disposed on the inner surface of the tower tank via the leg member, a stable installation state can be obtained.

A scaffold structure inside a tower tank according to a seventh invention of the present invention is the scaffolding material according to any one of the first to sixth inventions, wherein the scaffolding material is a supporting material adjacent to the supporting material arranged horizontally. It is characterized by being placed between. As the scaffold,
What is necessary is just to prepare the thing of the length which reaches between adjacent support members of a plurality of support members arranged horizontally.

The scaffold structure inside the tower tank according to the eighth invention of the present invention is characterized in that, in any one of the first to seventh inventions, a reinforcing member is provided between the support and the support. And The reinforcing member is optional such as a chain, a rope, and the like. ADVANTAGE OF THE INVENTION According to this invention, it is useful for reinforcement of the support material of a scaffold unit.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A scaffold structure inside a tower tank according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a specific example of the tower tank is a tank 11, in which a plurality of scaffold units 12 are combined to provide a scaffold structure. The scaffold unit 12 includes a support 13 and a support 16 for a scaffold 15 (see FIG. 10) foldably connected to the support 13 via a connection fitting 14 (see FIGS. 3 and 4). Have been. The strut 13 is a pipe having a circular cross section, and a support material for a scaffold 15 near its lower end.
16 are installed.

As shown in FIGS. 2 to 4, eight support members 16 of the scaffold 15 are provided at equal intervals radially with respect to the column 13. The connection fitting 14 has a lower surface portion 14A, and both side surface portions 14B formed on both ends of the lower surface portion 14A on the upper side. In both side portions 14B, holes for inserting pins 17 penetrating the support member 16 are formed. The support member 16 of the scaffold 15 has an upper surface portion 16A, and both side surface portions 16B formed at both ends of the upper surface portion 16A on the lower side. The lower surface side of the support member 16 is open because no lower surface portion is formed. The end surface of the support member 16 on the support column 13 side is formed in a semicircular shape so that the support member 16 is rotatable with the support member 16 attached to the connection fitting 14.

The support 16 of the scaffold 15 is
Is fixed to the inner surface of the tank 11 via a pressing member 18 whose length is adjustable in the longitudinal direction. As shown in FIG. 5, the specific structure of the pressing member 18 includes a bolt 21 attached to the supporting member 16 via a supporting member 19 fixed to the inner surface of the supporting member 16, and a tank 11 of the bolt 21. An elastic member 23, such as rubber, provided at an end on the inner surface side with an intermediate member 22 interposed therebetween. At the center of the support member 19 is a bolt
An insertion hole 21 is formed, and nuts 24 are screwed to both sides of the bolt 21 with the support member 19 interposed therebetween. By turning both nuts 24 toward the support member 19 from the lower surface side of the support member 16, the length dimension of the pressing member 18 with respect to the support member 16 can be adjusted.

The scaffold of this embodiment is the scaffold unit
12 are assembled in four stages. As shown in FIG. 6, the column 13 is made of a pipe, and the connection between the upper and lower columns 13 is made via a connecting pipe 25. Holes through which pins 26 for fixing the columns 13 are inserted are formed above and below the connecting pipe 25, and pin insertion holes are formed in portions of the columns 13 corresponding to these holes. I have. A cap 27 is attached to the upper end of the column 13 of the fourth-stage scaffold unit 12, which is the uppermost stage. A hook 28 is fixed to the upper surface of the cap 27. On the other hand, as shown in FIG.
Is fixed to the inner surface of the bottom of the tank 11 by a leg member 29.

As shown in FIGS. 7 to 9, the leg member 29
It is foldably connected to the support 13 via a connection fitting 31. The four leg members 29 are provided radially at equal intervals with respect to the column 13. The connection fitting 31 has an upper surface portion 31.
A, and both side surfaces 31B formed on the lower side at both ends of the upper surface portion 31A. On both side surfaces 31B, holes for inserting the pins 32 penetrating the leg members 29 are formed.

The leg member 29 has an upper surface 29A, a lower surface 29B, and both side surfaces 29C formed between both ends of upper and lower surfaces 29A, 29B.
have. The end surface of the leg member 29 on the support column 13 side is formed in a semicircular shape so as to be rotatable with the leg member 29 attached to the connection fitting 31. Also, both sides 29C
A U-shaped notch 33 is formed at the inner end of the tank 11 (see FIG. 9). The leg member 29 is
29 is fixed to the inner surface of the tank 11 via a pressing member 34 whose length is adjustable in the longitudinal direction.

The pressing member 34 is connected to the tank 11 of the leg member 29.
The leg member 29 is supported via a support member 35 fixed to the inner end surface.
Bolt 36 mounted on the tank 11 of this bolt 36
The rotating member 37 includes a rotating member 37 attached to a tip on the inner surface side, and an elastic member 39 such as rubber provided on the rotating member 37 via an intermediate member 38. The rotating member 37 has a shaft 41 connected to the bolt 36, and both side portions 42 that support the shaft 41. A hole for inserting a bolt 36 is formed at the center of the support member 35, and nuts 24 are screwed to both sides of the bolt 36 with the support member 35 interposed therebetween. Notch
By turning both nuts 24 toward the support member 35 through 33, the length dimension of the pressing member 34 with respect to the leg member 29 can be adjusted.

As shown in FIG. 10, the scaffold 15 is placed between adjacent supports 16 with the supports 16 arranged horizontally. The scaffold 15 is a long rectangular plate, and is first arranged so as not to overlap between the two support members 16, and then placed between the adjacent scaffolds 15 such that the ends overlap. Is placed. As shown in FIG. 11, a handrail 43 is provided at an end of the scaffold 15 on the support 13 side. A ladder 44 is arranged between the lower scaffold unit 12 and the upper scaffold unit 12. In addition, the bottom of the tank 11 and the first
Ladder 44 is also arranged between the fourth-stage scaffold unit 12 and the fourth-stage scaffold unit 12 and the top manhole 45.

The scaffold structure inside the tank 11 of the above embodiment can be installed as follows. First, in a factory, first to fourth scaffold units having the above structure
Prepare 12 and prepare it. Each scaffold unit 12 includes pressing members 18,34. These scaffold units 12 are carried to the site where the tank 11 is located, and as shown in FIG. 12, the lid 46 of the top manhole 45 is removed, and the support member 16 and the leg members 29 are closed. Into the tank 11, the leg member 29 is opened, and the scaffold unit 12 is fixed to the inner surface of the bottom of the tank 11, then each support member 16 is opened, and the pressing member 18 is pressed so that the elastic member 23 contacts the inner surface of the tank. By adjusting the length, each support member 16 is fixed to the inner surface of the tank 11. The support material 16
Is placed horizontally, and the scaffolding material 15 is
It is placed in between and provided with a handrail 43 (see FIGS. 10 and 11).

Next, the second-stage scaffold unit 12 is put into the tank 11 with the support member 16 closed, and the support
13 is placed on the upper end of the column 13 of the first-stage scaffold unit 12, and the upper and lower columns 13 are connected via the connecting pipe 25.
Connect each other. Then, each support member 16 of the second-stage scaffold unit 12 is opened, and the length of the pressing member 18 is adjusted so that the elastic member 23 comes into contact with the inner surface of the tank 11, so that each support member 16 is placed on the inner surface of the tank 11. After fixing, the scaffolding material 15 is placed between the adjacent supporting materials 16 and the handrail 43 is provided.

The third and fourth stage scaffold units 12 are assembled in the same manner as the second stage scaffold unit 12. Then, as shown in FIG. 11, the lower scaffold unit
A ladder 44 is disposed between the scaffold unit 12 and the scaffold unit 12 on the first tier.
And the ladder 44 is also arranged between the fourth-stage scaffold unit 12 and the top manhole 45. After the inspection and repair of the inner surface of the tank 11 are completed, when removing the scaffold, the support member 16 and the leg member 29 are closed and the
What is necessary is just to carry out 12 from the tank 11.

According to the above embodiment, the scaffold unit
By assembling 12 in order from the bottom to the top, a scaffold of any height can be easily assembled. Since the length of the pressing members 18 and 34 with respect to the support member 16 is adjustable, by adjusting this length,
The support member 16 can be securely fixed to the inner surface of the tank 11.

The pressing members 18 and 34 have bolts 21 and 36 attached to the support member 16.
Since the length dimensions of the pressing members 18 and 34 are adjustable, the structure of the pressing members 18 and 34 is simple. Moreover, since the connection between the columns 13 of the upper and lower scaffold units 12 is performed through the connection pipe 25, the connection between the columns 13 is easy.

Further, since the first-stage scaffold unit 12 is disposed on the inner surface of the bottom surface of the tank 11 via the leg member 29, a stable installation state can be obtained. In the above embodiment, in addition to the fixing of the supporting member 16 by the pressing members 18 and 34, as shown by a two-dot chain line in FIG. May be provided in between. This helps to reinforce the support 16 of the scaffold unit 12.

[0028]

According to the scaffold structure inside the tower tank according to the present invention, the scaffold can be easily assembled inside the tower tank, so that inspection and repair of the inner surface of the tower tank become easy.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a scaffold structure inside a tank according to an embodiment of the present invention.

FIG. 2 is a plan sectional view showing a scaffold structure inside the tank according to the embodiment.

FIG. 3 is a cross-sectional plan view showing a mounting state of a support to a support.

FIG. 4 is a side view showing a state in which the support is attached to a support.

FIG. 5 is a plan view showing a state in which a support member is fixed to an inner surface of a tank via a pressing member.

FIG. 6 is a side view showing a connection state of upper and lower scaffold units.

FIG. 7 is a plan sectional view showing a state in which the leg members are attached to the columns.

FIG. 8 is a side view showing a state where the leg members are attached to the columns.

FIG. 9 is a side sectional view showing a state in which the leg member is fixed to the inner surface of the tank via the pressing member.

FIG. 10 is a plan sectional view showing a state where a scaffold is placed between adjacent supporting members.

FIG. 11 is a side sectional view showing a state where the ladder is disposed between the lower scaffold unit and the upper scaffold unit.

FIG. 12 is a side sectional view showing a method of assembling the scaffold unit.

[Description of Signs] 11 Tank that is a tower tank 12 Scaffolding unit 13 Prop 14,31 Connection fitting 15 Scaffolding material 16 Supporting material 18,34 Pressing member 21,36 Bolt 23,39 Elastic member 43 Handrail 44 Ladder 47 Reinforcing member

Claims (8)

[Claims] 1. A scaffolding unit comprising a support and a support for a scaffolding material foldably connected to the support via a connection fitting, wherein the plurality of scaffold units are connected by connecting the supports. A scaffold structure inside the tower tank, which is installed in the tower tank in combination. 2. The scaffold structure inside the tower tank according to claim 1, wherein the support member for the scaffolding material is provided via a pressing member whose length is adjustable in the longitudinal direction of the support member. The scaffold structure inside the tower tank, which is fixed to the inner surface of the tower. 3. The scaffold structure inside the tower tank according to claim 2, wherein the pressing member includes a bolt attached to the support member, and the length of the pressing member is reduced by the bolt. A scaffold structure inside the tower tank that is adjustable. 4. The scaffold structure inside the tower tank according to claim 1, wherein a plurality of support materials for the scaffold are provided radially with respect to the support. Scaffold structure inside the tower tank. 5. The scaffold structure inside a tower tank according to claim 1, wherein the support is made of a pipe, and the connection between the supports is performed via a connection pipe. A unique scaffolding structure inside the tower tank. 6. The scaffold structure inside the tower tank according to any one of claims 1 to 5, wherein a lowermost one of the plurality of scaffold units is attached to an inner surface of the tower tank via a leg member. A scaffold structure inside the tower tank, which is fixed. 7. The scaffold structure inside a tower tank according to claim 1, wherein the scaffold is placed between adjacent support members in a state where the support members are arranged horizontally. The scaffold structure inside the tower tank. 8. The scaffold structure inside a tower tank according to claim 1, wherein a reinforcing member is provided between the column and the support member. Scaffold structure.