An aerial work system for working on the inner walls of ball tanks, allowing workers to easily adjust the horizontal position of the basket themselves

Abstract

This patent was filed under the Employment Stability Support Project for Petrochemical Plant Companies with Declining Sales. A high-altitude work system for working on the inner wall of a ball tank is disclosed. The high-altitude work system for working on the inner wall of a ball tank according to the present invention comprises: a rotatable center column positioned along the vertical direction in a center area within a ball tank and rotatable; a basket on which a worker carrying tools for inspection, maintenance, or cleaning work on the inner wall of the ball tank rides; a connecting rod connecting the rotatable center column and the basket so as to be rotatable relative to each other; a basket moving part for moving the basket so that the basket can move along the inner wall of the ball tank; and a self-horizontal posture adjustment part provided on the connecting rod and the basket, which allows the worker riding in the basket to adjust the horizontal posture of the basket by himself.

Description

Technology Field

[0001] An embodiment according to the concept of the present invention relates to a high-altitude work system for working on the inner wall of a ball tank, and in particular, to a high-altitude work system for working on the inner wall of a ball tank in which a worker riding in a basket can easily adjust the horizontal position of the basket by himself, thereby ensuring the safety of the worker and enabling proper inspection, maintenance, or cleaning work on the inner wall of the ball tank. Background Technology

[0002] A ball tank is a means of storing large quantities of gaseous gases, such as butane and propane, by applying high pressure to convert them into a liquid state. It is a massive, spherical steel structure manufactured by welding steel plates of unit sizes.

[0003] As ball tanks are manufactured using a welding method, the inner walls must be periodically inspected or maintained to prevent safety accidents caused by leakage. Additionally, the inner walls of the ball tank must be cleaned when replacing the gas filled inside with a different gas.

[0004] As such, inspecting, maintaining, or cleaning the inner walls of a ball tank requires devices for workers performing tasks at height, such as scaffolding systems. However, because conventional scaffolding systems have complex structures, installing or dismantling them is inevitably very cumbersome, leading to significant losses such as prolonged time consumption.

[0005] Therefore, recently, aerial work systems are used that feature a series of structures capable of moving a basket, on which a worker can ride, along the inner wall of a ball tank. These systems have a simpler structure than classic scaffolding systems, making installation and dismantling easier.

[0006] Meanwhile, when applying this system, the horizontal position of the basket is of paramount importance. In other words, if the basket is not properly leveled, the worker's posture may become unstable, posing a safety risk and potentially making it impossible to perform the work properly.

[0007] However, considering that existing equipment mostly lacks means to adjust the horizontal position of the basket, or if present, is installed in the lower area of ​​the center column (or shaft), making it difficult for an operator already inside the basket to adjust the horizontal position themselves, there is a need for the development of technology to compensate for this. Prior art literature

[0008] Korean Intellectual Property Office Application No. 10-2021-0013546 The problem to be solved

[0009] The technical problem that the present invention aims to solve is to provide a high-altitude work system for working on the inner wall of a ball tank, which allows a worker riding in the basket to easily adjust the horizontal position of the basket by himself, thereby ensuring the worker's safety and enabling proper inspection, maintenance, or cleaning of the inner wall of the ball tank. means of solving the problem

[0010] The above objective is achieved by a high-altitude work system for working on the inner wall of a ball tank, characterized by comprising: a rotatable center column positioned along the vertical direction in a center area within the ball tank and rotatable; a basket on which a worker carrying tools for inspection, maintenance, or cleaning work on the inner wall of the ball tank rides; a connecting rod connecting the rotatable center column and the basket so as to be rotatable relative to each other; a basket moving part for moving the basket so that the basket can move along the inner wall of the ball tank; and a self-horizontal position adjustment part provided on the connecting rod and the basket, which allows the worker riding in the basket to adjust the horizontal position of the basket by himself.

[0011] The self-horizontal posture adjustment unit may include: a horizontal posture adjustment gearbox formed by the assembly of a plurality of different gears, which is fixed to the basket within the basket; an input rotary motion shaft, which is rotatable in forward and reverse directions and has one end coupled to the horizontal posture adjustment gearbox within the basket; and an output linear motion shaft, which has one end connected to the horizontal posture adjustment gearbox and the other end connected to the connecting rod, and which moves forward and backward linearly by the action of the horizontal posture adjustment gearbox when rotational motion is input according to the forward and reverse directions of the input rotary motion shaft.

[0012] The above connecting rod is provided with a shaft connector to which the output linear motion shaft is connected, and the exposed end of the output linear motion shaft can be connected to the shaft connector relatively rotatable by means of a shaft hinge.

[0013] The above self-horizontal posture adjustment unit may further include a horizontal posture adjustment handle that is provided at the exposed end of the input rotary motion shaft and is directly handled by an operator.

[0014] The above horizontal position adjustment handle can be placed on the upper line of the basket.

[0015] The basket moving unit may include a basket up-and-down moving unit that moves the basket along the up-and-down direction on the inner wall of the ball tank; and a basket left-and-right moving unit that moves the basket along the left-and-right direction on the inner wall of the ball tank.

[0016] The above basket left and right moving part includes a rod-type basket left and right moving part that directly rotates the rotary center column through a rod-type structure, or a handle-type basket left and right moving part that rotates the rotary center column through handle rotation and a gear structure, and the rod-type basket left and right moving part may be applied to a ball tank in which a center hole is formed in the central area of ​​the bottom, and the handle-type basket left and right moving part may be applied to a ball tank in which a side hole is formed in the side area of ​​the bottom.

[0017] It may further include a column supporting unit that is applied to a ball tank having the center hole formed therein, is detachably coupled to a rotary center column adjacent to the center hole, and supports the rotary center column based on the inner wall of the ball tank.

[0018] The above column supporting unit may include: a unit body plate; a column supporter having a column insertion coupling portion provided in the upper central region of the unit body plate and supported by inserting and coupling the lower region of the rotary center column; a plurality of support pockets provided in the lower part of the unit body plate opposite to the column supporter with respect to the unit body plate; a plurality of support members, one end of which is inserted and coupled into the support pocket and the other end of which is supported on the bottom of the ball tank in the outer region of the center hole; a bridge foot provided at the exposed end of the support member and substantially supported on the bottom of the ball tank; and a plurality of reinforcing support members coupled between the unit body plate and the column supporter to reinforce and support the unit body plate and the column supporter.

[0019] The above support pocket has a support insertion coupling portion in which one end of the support support is inserted and coupled, and the support pockets are coupled to the unit body plate in a shape inclined to one side with respect to the longitudinal direction of the rotary center column, and the support pockets can be arranged at equal angular intervals on the unit body plate.

[0020] The above support member may be a fixed support member with a fixed length or a variable support member with a variable length. Effects of the invention

[0021] According to the present invention, a worker riding in a basket can easily adjust the horizontal position of the basket by himself, thereby ensuring the worker's safety and enabling proper inspection, maintenance, or cleaning of the inner wall of the ball tank. Brief explanation of the drawing

[0022] Detailed descriptions of each drawing are provided to help to more fully understand the drawings cited in the detailed description of the present invention. FIG. 1 is an installation diagram of a high-altitude work system for working on the inner wall of a ball tank according to the first embodiment of the present invention. Figure 2 is an example of the operation of Figure 1. Figure 3 is an enlarged view of the left and right movement area of ​​the basket in Figure 2. Figure 4 is a plan view of the main part of the basket vertical movement section. Figure 5 is an enlarged view of area A of Figure 1. Figure 6 is a partial cutaway view of Figure 5 to show the self-horizontal posture adjustment part in Figure 5. Figure 7 is a drawing in which the basket is shown with a dotted line to show the self-leveling posture adjustment part in Figure 5. FIG. 8 is a structural diagram of the requirements for a high-altitude work system for inner wall work of a ball tank according to a second embodiment of the present invention. Figure 9 is an enlarged view of the column supporting unit area of ​​Figure 8. FIG. 10 is a partial cross-sectional exploded view of the column supporting unit of FIG. 9. Fig. 11 is a modified example of Fig. 10. FIG. 12 is a structural diagram of a column supporting unit area applied to a high-altitude work system for inner wall work of a ball tank according to a third embodiment of the present invention. Fig. 13 is an enlarged view of the main part of Fig. 12. FIG. 14 is a structural diagram of a column supporting unit applied to a high-altitude work system for inner wall work of a ball tank according to the fourth embodiment of the present invention. FIG. 15 is a structural diagram of a column supporting unit applied to a high-altitude work system for inner wall work of a ball tank according to the fifth embodiment of the present invention. FIG. 16 is a structural diagram of a column supporting unit applied to a high-altitude work system for inner wall work of a ball tank according to the 6th embodiment of the present invention. Specific details for implementing the invention

[0023] Specific structural or functional descriptions of embodiments according to the concept of the present invention disclosed herein are merely illustrative for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms and are not limited to the embodiments described herein.

[0024] Embodiments according to the concept of the present invention may be subject to various modifications and may take various forms; therefore, embodiments are illustrated in the drawings and described in detail in this specification. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, and includes all modifications, equivalents, or substitutions that fall within the spirit and scope of the present invention.

[0025] Terms such as "first" or "second" may be used to describe various components, but said components should not be limited by said terms. For the sole purpose of distinguishing one component from another, for example, without departing from the scope of rights according to the concept of the present invention, the first component may be named the second component and similarly the second component may be named the first component.

[0026] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. Conversely, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. Other expressions describing the relationship between components, such as "between" and "exactly between," or "adjacent to" and "directly adjacent to," should be interpreted in the same way.

[0027] The terms used herein are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described herein, and should not be understood as precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0028] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined herein.

[0029] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings attached to this specification.

[0030] FIG. 1 is an installation state diagram of a high-altitude work system for working on the inner wall of a ball tank according to a first embodiment of the present invention, FIG. 2 is an example of the work of FIG. 1, FIG. 3 is an enlarged view of the left-right movement section of the basket in FIG. 2, FIG. 4 is a plan view of the main part of the up-down movement section of the basket, FIG. 5 is an enlarged view of area A of FIG. 1, FIG. 6 is a partial cutaway view of FIG. 5 to show the self-horizontal posture adjustment section in FIG. 5, and FIG. 7 is a drawing in which the basket is shown with a dotted line to show the self-horizontal posture adjustment section in FIG. 5.

[0031] Referring to these drawings, the high-altitude work system (100) for working on the inner wall of a ball tank according to the present embodiment allows a worker riding in a basket (130) to easily adjust the horizontal position of the basket (130) by himself, thereby ensuring the safety of the worker and enabling proper inspection, maintenance, or cleaning work on the inner wall of the ball tank (1).

[0032] As previously mentioned, the ball tank (1) is a means for storing gaseous gases, such as butane and protan, in a large capacity by applying high pressure to change them into a liquid state, and is a massive steel structure forming a spherical shape. On the exterior of the ball tank (1), support means (20, 30), including various scaffolding systems that support the ball tank (1), are provided.

[0033] In this embodiment, a side hole (11) is formed on one side of the lower portion of the ball tank (1). The side hole (11) can be used as a passage for equipment to enter and exit the ball tank (1).

[0034] The high-altitude work system (100) for working on the inner wall of a ball tank according to the present embodiment, which can be installed in a ball tank (1) having a side hole (11) formed in this way, may include a rotatable center column (110), a basket (130), a connecting rod (150), a basket moving part (160, 170), and a self-leveling posture adjustment part (140).

[0035] The rotary center column (110) is a shaft-type structure that is rotatably positioned along the vertical direction in the center area within the ball tank (1). A basket (130), a connecting rod (150), a basket moving part (160, 170), and a self-leveling posture adjustment part (140) are mounted on the rotary center column (110) at various locations.

[0036] The larger the ball tank (1), the longer the length of the rotary center column (110) becomes in proportion. However, since it is not possible to manufacture a rotary center column (110) that is infinitely long, the rotary center column (110) can be applied by connecting unit columns (110a) having unit sizes.

[0037] A bed frame (120) is provided in the lower region of the rotary center column (110). The bed frame (120) is a means of supporting the rotary center column (110) by connecting it to the rotary center column (110), while the basket left / right movement part (170) is mounted within the ball tank (1). That is, a left / right movement handle (171) and a left / right movement gearbox (172) can be mounted at different positions on the bed frame (120), which is a metal frame structure.

[0038] The basket (130) is a means for a worker to ride in. For safety, it takes the form of a cup with only the top open. The basket (130) is equipped with tools for inspection, maintenance, or cleaning of the inner wall of the ball tank (1).

[0039] Multiple baskets (130) are provided. Therefore, since multiple workers can inspect, maintain, or clean the inner wall of the ball tank (1) while riding in the basket (130), work efficiency can be increased and work time can be reduced. Multiple baskets (130) have the same structure.

[0040] The basket (130) includes a boarding section (131) in which a space for a worker to board is formed, and a tool mounting stand (132) provided to extend outward from one side of the upper part of the boarding section (131).

[0041] The boarding section (131) is constructed from an assembly of metal frames with partially open side walls to reduce weight. Tools for inspection, maintenance, or cleaning of the inner wall of the ball tank (1) can be placed on the tool stand (132) and temporarily fixed.

[0042] The basket (130) is further equipped with an auxiliary wheel (133). The auxiliary wheel (133) is a non-powered free-rotating roller. When the basket (130) approaches the inner wall of the ball tank (1), the auxiliary wheel (133) first contacts and supports the inner wall of the ball tank (1), thereby preventing the inner wall of the ball tank (1) from being damaged by the basket (130).

[0043] In addition, when the basket (130) moves along the inner wall of the ball tank (1), the auxiliary wheel (133) allows for increased ease of movement.

[0044] The auxiliary wheel (133) is supported on the boarding portion (131) of the basket (130) by the wheel elasticity providing portion (134). The wheel elasticity providing portion (134), which forms a spring structure, provides elastic bias in the direction in which the auxiliary wheel (133) moves outward. Thus, when the basket (130) approaches the inner wall of the ball tank (1), the auxiliary wheel (133) can first be supported in contact with the inner wall of the ball tank (1).

[0045] The basket (130) is connected to the connecting rod (150) through the basket hinge (135). Accordingly, the basket (130) can rotate freely by means of the basket hinge (135) at the end region of the connecting rod (150).

[0046] The connecting rod (150) is a rod-shaped structure that connects the rotary center column (110) and the basket (130) so as to be rotatable relative to each other. Since the worker must work stably while riding in the basket (130), the connecting rod (150) connects the rotary center column (110) and the basket (130) so as to be rotatable relative to each other.

[0047] As illustrated, the connecting rod (150) may be a non-linear structure and may be manufactured by connecting multiple rod-shaped structures in a non-linear form. The number of connecting rods (150) is equal to the number of baskets (130).

[0048] The basket moving part (160, 170) is a means for moving the basket (130) so that the basket (130) can move along the inner wall of the ball tank (1).

[0049] These basket moving parts (160, 170) include a basket up-down moving part (160) that moves the basket (130) along the up-down direction on the inner wall of the ball tank (1), and a basket left-right moving part (170) that moves the basket (130) along the left-right direction on the inner wall of the ball tank (1).

[0050] Since the basket (130) can be moved by the action of the basket up-and-down moving part (160) and the basket left-and-right moving part (170), the worker can stably perform inspection, maintenance, or cleaning work on the inner wall of the ball tank (1) while moving across the entire inner wall area of ​​the ball tank (1) which has a spherical shape.

[0051] The basket vertical movement unit (160) is applied as a winch type. That is, in this embodiment, the basket vertical movement unit (160) includes a vertical movement handle (161) for vertical movement of the basket (130), a vertical movement gearbox (162) coupled to the vertical movement handle (161) and operating along the clockwise or counterclockwise rotation direction of the vertical movement handle (161), and a wire (163) connected to the vertical movement gearbox (162), a connecting rod (150), or the basket (130).

[0052] As previously mentioned, the high-altitude work system (100) for working on the inner wall of a ball tank according to the present embodiment is provided with a plurality of baskets (130), and a basket up-and-down moving part (160) is provided for each basket (130) in a corresponding manner.

[0053] Accordingly, if the handle (161) for vertical movement of the basket vertical movement unit (160) is rotated, for example, clockwise, the basket (130) can move to the upper area through the action of the vertical movement gearbox (162) and the wire (163). Conversely, if the handle (161) for vertical movement of the basket vertical movement unit (160) is rotated, for example, counterclockwise, the basket (130) can move to the lower area through the action of the vertical movement gearbox (162) and the wire (163).

[0054] The basket left and right movement unit (170) may include a left and right movement handle (171) for moving the basket (130) left and right, and a left and right movement gearbox (172) connected to the left and right movement handle (171).

[0055] The left-right movement gearbox (172) is connected to the left-right movement handle (171) and the rotary center column (110), and serves to rotate the rotary center column (110) while operating in the clockwise or counterclockwise rotation direction of the left-right movement handle (171).

[0056] By rotating the left-right movement handle (171) of the left-right movement gearbox (172) clockwise or counterclockwise in conjunction with moving the basket (130) up or down within the ball tank (1) by the action of the aforementioned basket up-and-down movement unit (160), the basket (130) can be moved in the left-right direction by the action of the left-right movement gearbox (172). Accordingly, the worker riding in the basket (130) can cover the entire inner wall area of ​​the ball tank (1) which forms a spherical shape, and can perform inspection, maintenance, or cleaning work on the inner wall of the ball tank (1) without omission.

[0057] Meanwhile, as briefly mentioned earlier, the horizontal position of the basket (130) is of utmost importance when applying the present system (100). That is, if the horizontal position of the basket (130) is not properly maintained, the worker's posture may become unstable, which may pose a safety risk and make it impossible to perform the work properly.

[0058] However, in the case of existing equipment, there is no means for adjusting the horizontal position of the basket (130), or even if there is, it is mostly installed in the lower area of ​​the rotary center column (110), so it was difficult for a worker already on board the basket (130) to adjust the horizontal position of the basket (130) by himself. Therefore, a self-horizontal position adjustment unit (140) is added to the high-altitude work system (100) for working on the inner wall of a ball tank according to the present embodiment.

[0059] A self-leveling horizontal position adjustment unit (140) is provided on a connecting rod (150) and a basket (130) and is a means to enable a worker riding in the basket (130) to adjust the horizontal position of the basket (130) by himself. This self-leveling horizontal position adjustment unit (140) may include a horizontal position adjustment gearbox (141), an input rotary motion shaft (142), and an output linear motion shaft (143).

[0060] The horizontal position adjustment gearbox (141) is fixed to the basket (130) within the basket (130) and is an assembly structure formed by multiple different gear assemblies. For example, the horizontal position adjustment gearbox (141) can be manufactured by multiple gear assemblies that perform different functions, such as worm gears and worm wheels.

[0061] The input rotational motion shaft (142) has one end connected to the horizontal position adjustment gearbox (141) within the basket (130) and is an input shaft capable of rotating in forward and reverse directions. A worker riding in the basket (130) can rotate the input rotational motion shaft (142) in forward and reverse directions, that is, clockwise or counterclockwise.

[0062] A horizontal position adjustment handle (145) is further provided to allow the input rotational motion shaft (142) to be easily rotated.

[0063] A horizontal position adjustment handle (145) is provided at the exposed end of the input rotational motion shaft (142) and is a means for the operator to handle directly. At this time, the horizontal position adjustment handle (145) can be positioned on the upper line of the basket (130). Thus, as shown in FIG. 2, an operator standing and working while riding in the basket (130) can easily rotate the horizontal position adjustment handle (145) in forward and reverse directions.

[0064] The output linear motion shaft (143) has one end connected to a horizontal posture adjustment gearbox (141) and the other end connected to a connecting rod (150), and is an output shaft that moves forward and backward linearly by the action of the horizontal posture adjustment gearbox (141) when rotational motion is input according to the forward and reverse directions of the input rotational motion shaft (142).

[0065] The connecting rod (150) is provided with a shaft connector (151) to which an output linear motion shaft (143) is connected, and the exposed end of the output linear motion shaft (143) is connected to the shaft connector (151) so as to be rotatable relative to it by a shaft hinge (144).

[0066] The operation of the self-horizontal posture adjustment unit (140) having this configuration is explained with reference to FIG. 7.

[0067] When a worker riding in the basket (130) rotates the input rotational motion shaft (142), for example, clockwise through the horizontal posture adjustment handle (145), the output linear motion shaft (143) can advance in the +L direction through the action of the horizontal posture adjustment gearbox (141), and thus the basket (130) can rotate in the R direction.

[0068] Conversely, if a worker riding in the basket (130) rotates the input rotational motion shaft (142), for example, counterclockwise through the horizontal posture adjustment handle (145), the output linear motion shaft (143) can move backward in the -L direction through the action of the horizontal posture adjustment gearbox (141), thereby allowing the basket (130) to rotate in the +R direction. Based on this action, the worker riding in the basket (130) is able to adjust the horizontal posture himself.

[0069] According to the present embodiment, which operates based on the structure described above, a worker riding in the basket (130) can easily adjust the horizontal position of the basket (130) by himself, thereby ensuring the worker's safety and enabling proper inspection, maintenance, or cleaning of the inner wall of the ball tank (1).

[0070] FIG. 8 is a structural diagram of a high-altitude work system for inner wall work of a ball tank according to a second embodiment of the present invention, FIG. 9 is an enlarged view of the column supporting unit area of ​​FIG. 8, FIG. 10 is a partial cross-sectional exploded view of the column supporting unit of FIG. 9, and FIG. 11 is a modified example of FIG. 10.

[0071] The ball tank (1) of the first embodiment described above has a structure in which the central area of ​​the bottom is closed, so there is no particular problem in installing the handle-type basket left and right moving part (170, see FIGS. 1 to 3).

[0072] However, in the case of a ball tank (1a) in which a center hole (12) is formed in the center area of ​​the bottom as in the present embodiment, the center hole (12) causes positional interference, so the aforementioned handle-type basket left-right moving part (170, see FIGS. 1 to 3) cannot be installed, and consequently, the rotary center column (110) cannot be supported. Therefore, in this case, a rod-type basket left-right moving part (70) and a column supporting unit (80) must be applied.

[0073] In other words, in the case of a ball tank (1a) in which a center hole (12) is formed in the central area of ​​the bottom as in the present embodiment, a column supporting unit (80) can be applied to support a rotatable center column (110). For reference, the center hole (12) is also utilized as a place for the entry and exit of equipment.

[0074] Additionally, the rotary center column (110) can be rotated by directly installing a rod-shaped basket left-right moving part (70) on the rotary center column (110). The rod-shaped basket left-right moving part (70) has the same function as the aforementioned handle-shaped basket left-right moving part (170), differing only in structure. That is, by rotating the rod-shaped basket left-right moving part (70), the rotary center column (110) can be rotated, and through this, the basket (130) can be moved in the left-right direction on the inner wall of the center hole (12).

[0075] Meanwhile, a column supporting unit (80) that can be applied to a ball tank (1a) having a center hole (12) formed in the bottom central area as in the present embodiment is detachably coupled to a rotary center column (110) adjacent to the center hole (12) and serves to support the rotary center column (110) based on the inner wall of the ball tank (1a). This column supporting unit (80) includes a unit body plate (81), a column supporter (82), a support pocket (83), and a support member (84).

[0076] The unit body plate (81) is a flat plate-shaped structure. The unit body plate (81) supports the column supporter (82) and the support pocket (83).

[0077] A column supporter (82) is provided in the upper central area of ​​the unit body plate (81). A column insertion coupling part (82a) is formed in the column supporter (82) to support the lower portion of the rotary center column (110) by insertion and coupling. Of course, after the lower portion of the rotary center column (110) is inserted and coupled into the column insertion coupling part (82a), it is preferable to fix it with a separate fixing member (not shown).

[0078] A reinforcing support (86) is applied to ensure a stable and robust connection between the unit body plate (81) and the column supporter (82). The reinforcing support (86) is connected between the unit body plate (81) and the column supporter (82) to reinforce and support the unit body plate (81) and the column supporter (82). Multiple reinforcing supports (86) are provided at equal intervals between the unit body plate (81) and the column supporter (82). The reinforcing supports (86) can be welded together between the unit body plate (81) and the column supporter (82).

[0079] The support pocket (83) is provided at the bottom of the unit body plate (81), opposite the column supporter (82) with respect to the unit body plate (81). The support pocket (83) is provided with a support insertion coupling part (83a) that is supported by inserting and coupling one end of the support member (84).

[0080] At this time, the support pockets (83) are attached to the unit body plate (81) in a shape inclined to one side with respect to the longitudinal direction of the rotary center column (110). Then, a plurality of support pockets (83) are arranged at equal angular intervals on the unit body plate (81). Therefore, when a support member (84) is attached to the support pockets (83), the attachment force can be stably achieved.

[0081] One end of the support member (84) is inserted into and connected to the support member insertion joint (83a) of the support member pocket (83), and the other end is supported on the bottom of the ball tank (1a) in the outer area of ​​the center hole (12). Multiple support members (84) are applied, equal to the number of support member pockets (83).

[0082] A support foot (85, bridge foot) is provided at the exposed end of such a support member (84). The support foot (85) is a structure that is substantially supported on the bottom of the ball tank (1a). Therefore, it is preferable that the support foot (85) be made of an elastic material that not only provides stable support but also prevents slipping.

[0083] Accordingly, as shown in FIG. 10, when the support member (84) is separated, the support member (84) is assembled by inserting it into the support member pockets (83), and the rotary center column (110) is inserted and coupled to the column supporter (82), the equipment can be installed so that the rotary center column (110) can be stably supported regardless of the center hole (12), even if the center hole (12) is formed.

[0084] Meanwhile, the cases of FIGS. 8 to 10 correspond to fixed support members (84) in which the length of the support member (84) is fixed.

[0085] However, as illustrated in Fig. 11, a modified example, the support member (84') of the column supporting unit (80') is applied as a variable support member (84') with variable length. This variable support member (84') includes a fixed support member (84a) that is coupled by being inserted into the column insertion coupling part (82a) of the column supporter (82), a length-variable support member (84b) to which a support foot (85) is coupled to one end, and a support member fixing member (84c) that selectively fixes the length-variable support member (84b) to the fixed support member (84a). When the variable support member (84') is applied as in Fig. 11, there is an advantage that the variable support member (84') can be easily mounted to fit the size of the ball tank (1a).

[0086] Accordingly, when a center hole (12) is formed in the bottom central area of ​​the ball tank (1a), a column supporting unit (80, 80') as in this embodiment can be applied to support a rotary center column (110) based on the inner wall of the ball tank (1a), so the high-altitude work system (50) for working on the inner wall of the ball tank according to this embodiment can be applied without any problems.

[0087] Even when this embodiment is applied, the worker riding in the basket (130) can easily adjust the horizontal position of the basket (130) by himself, thereby ensuring the worker's safety and allowing for proper inspection, maintenance, or cleaning of the inner wall of the ball tank (1). In particular, this embodiment has the advantage of being applicable to a ball tank (1a) in which a center hole (12) is formed in the center area of ​​the bottom.

[0088] FIG. 12 is a structural diagram of a column supporting unit area applied to a high-altitude work system for inner wall work of a ball tank according to a third embodiment of the present invention, and FIG. 13 is an enlarged view of a key part of FIG. 12.

[0089] Referring to these drawings, in the case of the present embodiment, the structure and configuration of the column supporting unit (180) differ from the previously described embodiment. Of course, even though the structure and configuration differ, the function and role of the column supporting unit (180) are the same as those of the previously described embodiment. Furthermore, since the structure and configuration other than the column supporting unit (180) are identical to those of the previously described embodiment, a redundant description is omitted.

[0090] The column supporting unit (180) according to the present embodiment can also be applied to a ball tank (1a) in which a center hole (12) is formed, and is a structure that is detachably coupled to a rotary center column (110) adjacent to the center hole (12). That is, it is a structure that can be assembled and used only when necessary.

[0091] These column supporting units (180) serve to support the rotary center column (110) based on the inner wall of the ball tank (1a). That is, only when the column supporting units (180) are present can the lower region of the long rod-shaped rotary center column (110) be stably supported.

[0092] The column supporting unit (180) includes a supporting unit body (181), a column supporter (182) having a column insertion coupling part (182a) provided in the upper central area of ​​the supporting unit body (181) and supported by inserting and coupling the lower area of ​​the rotary center column (110), and a plurality of support bridges (190) one side connected to the supporting unit body (181) and the other side supported on the inner wall of the ball tank (1a).

[0093] A support bridge (190) is a substantial support structure in which one side is connected to a supporting unit body (181) and the other side is supported by the inner wall of a ball tank (1a). A plurality of support bridges (190) are arranged at equal intervals relative to the supporting unit body (181). For example, the support bridges (190) are arranged in a triangular configuration or larger. Thus, stable support force can be secured.

[0094] The support bridge (190) may include a main bridge (191) connected to a supporting unit body (181), a detachable connecting member (192) having one end detachably connected to the main bridge (191), and a sub-bridge (193) having one end detachably connected to the detachable connecting member (192) while the other end is supported on the inner wall of the ball tank (1a). In this embodiment, the sub-bridge (193) may have a non-linear shape.

[0095] The main bridge (191) may be formed integrally with the supporting unit body (181) or may be connected via a separate screw structure. Also, since the main bridge (191), the detachable connector (192), and the sub-bridge (193) are structures that can be disassembled and assembled, the detachable connector (192) having a length suitable for the internal conditions of the ball tank (1a) can be used.

[0096] Even when this embodiment is applied, the worker riding in the basket (130) can easily adjust the horizontal position of the basket (130) by himself, thereby ensuring the worker's safety and allowing for proper inspection, maintenance, or cleaning of the inner wall of the ball tank (1). In particular, this embodiment has the advantage of being applicable to a ball tank (1a) in which a center hole (12) is formed in the center area of ​​the bottom.

[0097] FIG. 14 is a structural diagram of a column supporting unit applied to a high-altitude work system for inner wall work of a ball tank according to the fourth embodiment of the present invention.

[0098] Referring to this drawing, the structure of the support bridge (290) of the column supporting unit (280) applied to the present system is different from that of the third embodiment described above. Of course, the remaining structure and components of the column supporting unit (280), and the corresponding functions and roles, are the same as those of the third embodiment. Therefore, a redundant description is omitted.

[0099] The column supporting unit (280) applied in this embodiment may include a main bridge (291) connected to a supporting unit body (181), a detachable connecting member (292) with one end detachably connected to the main bridge (291), a sub-bridge (293) with one end detachably connected to the detachable connecting member (292) and having a non-linear shape, and an inner wall support foot (294) made of an elastic material that is rotatably connected to the other end of the sub-bridge (293) and substantially supported on the inner wall of the ball tank (1a). A hinge (295) is connected to the inner wall support foot (294) and the sub-bridge (293) so that the inner wall support foot (294) can rotate.

[0100] As in the present embodiment, when an inner wall support foot (294) is applied, and the inner wall support foot (294) is rotatably connected to the other end of the sub-bridge (293) by the action of a hinge (295), there is an advantage that the inner wall support foot (294) can be stably attached to the inner wall of the ball tank (1a) which has a spherical shape.

[0101] Even when this embodiment is applied, the worker riding in the basket (130) can easily adjust the horizontal position of the basket (130) by himself, thereby ensuring the worker's safety and allowing for proper inspection, maintenance, or cleaning of the inner wall of the ball tank (1). In particular, this embodiment has the advantage of being applicable to a ball tank (1a) in which a center hole (12) is formed in the center area of ​​the bottom.

[0102] FIG. 15 is a structural diagram of a column supporting unit applied to a high-altitude work system for inner wall work of a ball tank according to the fifth embodiment of the present invention.

[0103] Referring to this drawing, the column supporting unit (380) applied to the system is substantially the same as the column supporting unit (280) of the fourth embodiment described above. That is, the column supporting unit (380) applied to the present embodiment includes a main bridge (391) connected to the supporting unit body (181), a detachable connecting member (392) with one end detachably connected to the main bridge (391), a sub-bridge (393) with one end detachably connected to the detachable connecting member (392) and having a non-linear shape, an inner wall support foot (394) made of an elastic material that is rotatably connected to the other end of the sub-bridge (393) and substantially supported on the inner wall of the ball tank (1a), and a hinge (395) connected to the inner wall support foot (394) and the sub-bridge (393).

[0104] In this structure, the inner wall support foot (394) is detachably connected to a metal foot pocket (396). In this case, there is an advantage that the inner wall support foot (394), made of elastic material, can be easily replaced with a new one when it wears out.

[0105] In addition, the leading edge of the inner wall support foot (394) applied in this embodiment forms an arc-shaped curved portion (394a) having the same curvature as the inner wall of the ball tank (1a). As in this embodiment, if the leading edge of the inner wall support foot (394) forms an arc-shaped curved portion (394a), there is an advantage in that it can be stably adhered to the inner wall of the ball tank (1a) which has a spherical shape.

[0106] Even when this embodiment is applied, the worker riding in the basket (130) can easily adjust the horizontal position of the basket (130) by himself, thereby ensuring the worker's safety and allowing for proper inspection, maintenance, or cleaning of the inner wall of the ball tank (1). In particular, this embodiment has the advantage of being applicable to a ball tank (1a) in which a center hole (12) is formed in the center area of ​​the bottom.

[0107] FIG. 16 is a structural diagram of a column supporting unit applied to a high-altitude work system for inner wall work of a ball tank according to the 6th embodiment of the present invention.

[0108] Referring to this drawing, the column supporting unit (480) applied to the system is substantially the same as the column supporting unit (380) of the fifth embodiment described above. That is, the column supporting unit (480) applied to the present embodiment includes a main bridge (491) connected to the supporting unit body (181), a detachable connecting member (492) with one end detachably connected to the main bridge (491), a sub-bridge (493) with one end detachably connected to the detachable connecting member (492) and having a non-linear shape, an inner wall support foot (494) made of an elastic material that is rotatably connected to the other end of the sub-bridge (493) and substantially supported on the inner wall of the ball tank (1a), a hinge (495) connected to the inner wall support foot (494) and the sub-bridge (493), and a foot pocket (496) made of a metal material that supports the inner wall support foot (494) and to which the inner wall support foot (494) is detachably coupled.

[0109] In addition, the leading edge of the inner wall support foot (494) applied in this embodiment also forms an arc-shaped curved portion (494a) having the same curvature as the inner wall of the ball tank (1a), and an uneven pattern portion (494b) is additionally formed in the arc-shaped curved portion (494a). The uneven pattern portion (494b) can be changed to a triangular tooth pattern.

[0110] As in the present embodiment, when the leading edge of the inner wall support foot (494) forms an arc-shaped curved portion (494a) and an uneven pattern portion (494b) is formed in the arc-shaped curved portion (494a) area, there is an advantage of being able to stably adhere to the inner wall of the spherical ball tank (1a).

[0111] Even when this embodiment is applied, the worker riding in the basket (130) can easily adjust the horizontal position of the basket (130) by himself, thereby ensuring the worker's safety and allowing for proper inspection, maintenance, or cleaning of the inner wall of the ball tank (1). In particular, this embodiment has the advantage of being applicable to a ball tank (1a) in which a center hole (12) is formed in the center area of ​​the bottom.

[0112] As such, the present invention is not limited to the described embodiments, and it is obvious to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention. Accordingly, such modifications or variations should be deemed to fall within the scope of the claims of the present invention. Explanation of the symbols

[0113] 1 : Ball tank 100 : High-altitude work system 110: Rotating center column 120: Bed frame 130 : Basket 131 : Boarding area 132: Tool stand 140: Self-leveling position adjustment unit 141: Horizontal position adjustment gearbox 142: Input rotary motion shaft 143 : Output linear motion shaft 144 : Shaft hinge 145: Handle for horizontal position adjustment 150: Connecting rod 151: Shaft connector 160: Basket up-and-down movement part 161: Handle for vertical movement 162: Gearbox for vertical movement 163 : Wire 170 : Basket left / right movement part 171: Handle for left / right movement 172: Gearbox for left / right movement

Claims

Claim 1 A rotatable center column positioned along the vertical direction in a center area within a ball tank and rotatable; a basket on which a worker carrying a tool for inspection, maintenance, or cleaning work on the inner wall of the ball tank rides; a connecting rod connecting the rotatable center column and the basket so as to be rotatable relative to each other; a basket moving part for moving the basket so that the basket can move along the inner wall of the ball tank; and a self-horizontal position adjustment part provided on the connecting rod and the basket, which allows a worker riding in the basket to adjust the horizontal position of the basket themselves, wherein the basket moving part comprises a basket vertical moving part for moving the basket along the vertical direction on the inner wall of the ball tank; A high-altitude work system for working on the inner wall of a ball tank, comprising a basket left-right moving part that moves the basket along the left-right direction on the inner wall of the ball tank, wherein the basket left-right moving part includes a rod-type basket left-right moving part that directly rotates the rotary center column through a rod-type structure or a handle-type basket left-right moving part that rotates the rotary center column through a handle rotation and gear structure, wherein the rod-type basket left-right moving part is applied to a ball tank in which a center hole is formed in the central area of ​​the bottom, and the handle-type basket left-right moving part is applied to a ball tank in which a side hole is formed in the side area of ​​the bottom. Claim 2 A high-altitude work system for working on the inner wall of a ball tank, characterized in that, in claim 1, the self-horizontal posture adjustment unit comprises: a horizontal posture adjustment gearbox formed by the assembly of a plurality of different gears, which is fixed to the basket within the basket; an input rotary motion shaft, which is rotatable in forward and reverse directions and has one end coupled to the horizontal posture adjustment gearbox within the basket; and an output linear motion shaft, which has one end connected to the horizontal posture adjustment gearbox and the other end connected to the connecting rod, and which moves forward and backward linearly by the action of the horizontal posture adjustment gearbox when rotational motion is input according to the forward and reverse directions of the input rotary motion shaft. Claim 3 A high-altitude work system for working on the inner wall of a ball tank, characterized in that, in paragraph 2, the connecting rod is provided with a shaft connector to which the output linear motion shaft is connected, and the exposed end of the output linear motion shaft is connected to the shaft connector so as to be rotatable relative to it by a shaft hinge. Claim 4 A high-altitude work system for working on the inner wall of a ball tank, characterized in that, in paragraph 2, the self-horizontal posture adjustment unit is provided at the exposed end of the input rotary motion shaft and further includes a horizontal posture adjustment handle that is directly handled by an operator. Claim 5 A high-altitude work system for working the inner wall of a ball tank, characterized in that, in paragraph 4, the horizontal posture adjustment handle is positioned on the upper line of the basket. Claim 6 delete Claim 7 delete Claim 8 A high-altitude work system for working on the inner wall of a ball tank, characterized in that, in claim 1, it further comprises a column supporting unit that is applied to the ball tank having the center hole formed therein, is detachably coupled to the rotary center column adjacent to the center hole, and supports the rotary center column based on the inner wall of the ball tank. Claim 9 In claim 8, the column supporting unit comprises: a unit body plate; a column supporter having a column insertion coupling portion provided in the upper central region of the unit body plate and supported by inserting and coupling the lower region of the rotary center column; a plurality of support pockets provided in the lower part of the unit body plate opposite to the column supporter with respect to the unit body plate; a plurality of support members, one end of which is inserted and coupled into the support pocket and the other end of which is supported on the bottom of the ball tank in the outer region of the center hole; a bridge foot provided at the exposed end of the support member and substantially supported on the bottom of the ball tank; and a plurality of reinforcing members coupled between the unit body plate and the column supporter to reinforce and support the unit body plate and the column supporter, characterized in that the high-altitude work system for inner wall work of a ball tank. Claim 10 A high-altitude work system for inner wall work of a ball tank according to claim 9, wherein the support pocket is provided with a support insertion coupling portion in which one end of the support support is inserted and coupled, and the support pockets are coupled to the unit body plate in a shape inclined to one side with respect to the longitudinal direction of the rotary center column, and the support pockets are arranged at equal angular intervals on the unit body plate. Claim 11 A high-altitude work system for working on the inner wall of a ball tank, characterized in that, in claim 9, the support member is a fixed support member with a fixed length or a variable support member with a variable length.

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