Construction device for anticorrosion of inner wall of vertical storage tank

Abstract

The application provides a construction device for anticorrosion of inner wall of vertical storage tank, which comprises a stand column arranged in the middle of the storage tank, a horizontal support arranged on the stand column and extending from the stand column to the inner wall of the storage tank, a lifting device for controlling the lifting of the horizontal support along the stand column, and a rotating device for controlling the rotation of the horizontal support around the central axis of the stand column. The application utilizes the stand column and the liftable and rotatable horizontal support arranged on the stand column, and the combined control of lifting and rotation can make the horizontal support correspond to any position of the inner wall of the storage tank conveniently, so that the construction can be performed without dead angle. During the construction, the stand column and the horizontal support only need to be arranged in the tank body and erected, and then the construction can be performed. The device has less components, does not need complex connecting equipment, is extremely convenient to erect, is convenient for flexible adjustment of the construction position, and improves the construction efficiency.

Description

Technical Field

[0001] This invention belongs to the field of tank construction technology, and in particular to a construction device for corrosion protection of the inner wall of a vertical storage tank. Background Technology

[0002] Storage tanks are indispensable facilities for storing materials in industrial and civilian sectors such as petroleum, chemical, and grain and oil industries. After fabrication, carbon steel storage tanks require internal wall sandblasting for rust removal and painting for corrosion protection. To complete the sandblasting and corrosion protection work, a working platform needs to be built inside the tank. The traditional method is to erect a double-row scaffold along the inner wall of the tank, with a height equivalent to the tank's height. This method has a long erection period, high construction costs, and the obstruction caused by the scaffolding poles reduces the efficiency of sandblasting and painting. Furthermore, workers climbing up and down the scaffolding also pose safety risks.

[0003] For example, the invention patent with application number CN202220061262.9 discloses a device for sandblasting and rust removal and paint spraying of the inner wall of a vertical storage tank. The device uses a traction rope to suspend the construction platform for workers to carry out the work. Although it improves the construction efficiency to a certain extent, it requires the configuration of blocks, which is not conducive to the vertical and horizontal movement of the platform. Summary of the Invention

[0004] The main objective of this invention is to provide a construction device for corrosion protection of the inner wall of a vertical storage tank. This construction device is easy to install inside the tank, allows for flexible adjustment of the construction position, and improves construction efficiency.

[0005] The objective of this invention can be achieved through the following technical solution: a construction device for corrosion protection of the inner wall of a vertical storage tank, comprising a column for installation in the middle of the storage tank, a horizontal support extending from the column toward the inner wall of the storage tank on the column, the horizontal support being raised and lowered along the column by a lifting device, and the horizontal support being rotated around the central axis of the column by a rotating device.

[0006] In some embodiments, the horizontal support is a construction platform perpendicular to the column.

[0007] In some embodiments, the construction platform is a transverse construction walkway with a support frame fitted onto the column in the middle. Guide wheels are supported between the support frame and the column. The lifting device includes a traction rope suspending the support frame, and the traction rope is controlled by a traction rope retraction device.

[0008] In some embodiments, the bottom of the column is rotatably supported on a base, and the column is controlled by a motor to rotate relative to the base.

[0009] In some embodiments, the horizontal support includes a ring frame, the ring frame including a linkage unit circumferentially connected relative to the column, the linkage unit including two links connected together at the middle by a central hinge axis, the two links having a bend at the middle, the bend directions of the two links in the circumferential direction of one linkage unit of the ring frame being opposite, the ends of the links of two circumferentially adjacent linkage units being rotatably connected by a first hinge axis near the column and a second hinge axis away from the column, respectively, a lifting sleeve slidingly fitted on the column, and the ring frame and the lifting sleeve being connected by a telescopic rod.

[0010] In some embodiments, the first hinge shaft is connected to the injection pipe, and the second hinge shaft is connected to the second sliding sleeve, through which the injection pipe slides.

[0011] In some embodiments, the spray pipe is rotatably connected to the first hinge shaft, the spray pipe is controlled by a rotating device to rotate about its own axis, and the end of the spray pipe has a bent nozzle.

[0012] In some embodiments, a first sleeve is connected to the first hinge shaft, the injection pipe is slidably sleeved inside the first sleeve, a worm gear is sleeved on the injection pipe, the worm gear cooperates with a worm, and the worm is controlled to rotate by a rotating device.

[0013] In some embodiments, pulleys are coaxially connected to the worm gear, all of which are driven by the same transmission belt, and the rotating device controls all the pulleys to rotate synchronously via the transmission belt.

[0014] In some embodiments, the end of the telescopic rod is connected to two of the central hinge axes.

[0015] Compared with existing technologies, this construction device for corrosion protection of the inner wall of vertical storage tanks has the following advantages: This invention utilizes a column and a horizontally adjustable and rotatable support mounted on the column. Through a combination of lifting and rotation control, the horizontal support can be easily aligned with any position on the inner wall of the storage tank, enabling construction without blind spots. During construction, simply placing the column and horizontal support into the tank and setting them up is sufficient. With fewer components and no need for complex connection equipment, setup is extremely convenient, allowing for flexible adjustment of the construction position and improving construction efficiency. Attached Figure Description

[0016] In the accompanying drawings, for the purpose of illustrating details and facilitating understanding of the principles, they are not necessarily drawn to scale, and similar reference numerals may describe similar parts in different views. Similar reference numerals with different letter suffixes may indicate different examples of similar parts. The accompanying drawings generally illustrate the embodiments discussed herein by way of example and not limitation.

[0017] Figure 1 This is a schematic diagram of Example 1; Figure 2 This is a schematic diagram of the connection between the support frame and the pillar in Embodiment 1; Figure 3 This is a schematic diagram of the base in Embodiment 1; Figure 4 This is a schematic diagram of the ring frame in Embodiment 2; Figure 5 This is a schematic diagram of the linkage unit in Embodiment 2; Figure 6 This is a top view of the ring frame installed inside the storage tank in Embodiment 2; Figure 7 yes Figure 6 A schematic diagram showing the nozzle of the injection pipe facing another direction; Figure 8 yes Figure 7 A schematic diagram of the ring frame after it has been reduced in size.

[0018] In the diagram, 1. Storage tank; 2. Column; 3. Construction walkway; 4. Traction rope; 5. Support frame; 6. Guide wheel; 7. Base; 8. Control motor; 9. Fixed gear; 10. Drive gear; 11. Connecting rod; 12. Central hinge shaft; 13. Lifting sleeve; 14. Telescopic rod; 15. First hinge shaft; 16. Injection pipe; 17. Second hinge shaft; 18. Second sliding sleeve; 19. First sleeve; 20. Locking ring; 21. Worm gear; 22. Worm; 23. Support rod; 24. Pulley; 25. Transmission belt; 26. Drive motor. Detailed Implementation

[0019] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments, and the following embodiments do not limit the invention covered by the claims. Furthermore, not all combinations of the features described in the embodiments are necessary for the inventive solution.

[0020] Those skilled in the art will understand that all directional references (e.g., above, below, up, up, down, down, top, bottom, left, right, vertical, horizontal, etc.) are used descriptively in the drawings to aid the reader's understanding and do not imply (e.g., limitations on the scope of the invention as defined by the appended claims) a limitation on the location, orientation, or use of the invention. Furthermore, some vague terms (e.g., substantially, certain, generally, etc.) may refer to slight inaccuracies or minor deviations in conditions, quantities, values, or dimensions, some of which are within manufacturing tolerances or allowable limits.

[0021] Example 1: like Figure 1 , 2As shown in Figure 3, a construction device for corrosion protection of the inner wall of a vertical storage tank 1 includes a rectangular column 2 vertically erected in the middle of the storage tank 1. The column 2 is a truss structure. A horizontal support extending from the column 2 toward the inner wall of the storage tank 1 is provided on the column 2. The horizontal support can be used as or to carry construction equipment. In this embodiment, the horizontal support is a construction platform perpendicular to the column 2. That is, the construction platform is a horizontal construction walkway 3 for workers to move around. The end of the walkway is close to the inner wall of the storage tank 1 so that workers can stand at the end of the walkway to carry out construction on the inner wall of the storage tank 1, such as sandblasting to remove rust or painting for corrosion protection. The horizontal support is controlled by a lifting device to move up and down along the column 2. The construction walkway 3 has a rectangular support frame 5 fitted onto the column 2 in the middle. The lifting device includes a traction rope 4 suspending the support frame 5. The traction rope 4 is wound up and down by a traction rope 4 winding and unwinding device, such as a winch, thereby controlling the position of the construction walkway 3 corresponding to the inner wall of the storage tank 1 in the height direction. A guide wheel 6 is supported between the support frame 5 and the column 2 to reduce the friction between them during relative movement.

[0022] The horizontal support is controlled by a rotating device to rotate around the central axis of the column 2, thereby allowing the end of the construction walkway 3 to correspond to different positions on the circumferential inner wall of the storage tank 1. Through a combination of lifting and rotation control, the end of the construction walkway 3 can be conveniently aligned with any position on the inner wall of the storage tank 1, enabling construction without blind spots. In this embodiment, the rotating device includes a base 7 supported at the bottom of the column 2. The bottom of the column 2 is rotatably supported on the base 7. The column 2 is controlled by a control motor 8 to rotate relative to the base 7. A fixed gear 9 is fixed on the base 7. The motor is fixed to the column 2, and a drive gear 10 meshing with the fixed gear 9 is provided on the motor shaft. The motor controls the drive gear 10 to rotate relative to the fixed gear 9, thereby causing the column 2 to rotate relative to the base 7 around a vertical axis, thus driving the construction walkway 3 to rotate.

[0023] During construction, it is only necessary to place the column 2 and the walkway into the tank and set them up. There are few parts and no complicated connection equipment is required, making the setup extremely convenient. It also allows for flexible adjustment of the construction position and improves construction efficiency.

[0024] Example 2: like Figure 4 , 5 As shown in Figures 6, 7, and 8, unlike the embodiments described above, the horizontal support is a ring-shaped frame surrounding the column 2.

[0025] The ring frame includes a link 11 unit circumferentially connected to the column 2. The link 11 unit includes two identical links 11 rotatably connected together in the middle by a central hinge axis 12. The two links 11 have a V-shaped bend in the middle, that is, the link 11 is not a straight rod but a V-shaped bent rod.

[0026] In the circumferential direction of the ring frame, the two links 11 of a link 11 unit bend in opposite directions. The ends of the links 11 of two adjacent links 11 units in the circumferential direction are rotatably connected by a first hinge shaft 15 that is radially close to the column 2 and a second hinge shaft 17 that is radially away from the column 2, thereby forming a closed ring-shaped horizontal support.

[0027] A lifting sleeve 13 slides on the column 2. The lifting sleeve 13 can be raised and lowered by a lifting control device such as a traction rope 4. In this embodiment, the column 2 is cylindrical and the lifting sleeve 13 is cylindrical. The annular frame and the lifting sleeve 13 are connected by a telescopic rod 14 with controllable length extension. The end of the telescopic rod 14 is connected to two central hinge shafts 12. The telescopic rod 14 can be, for example, a hydraulic cylinder, a pneumatic rod, an electric cylinder, etc. Since the connecting rods 11 are rotatably connected by hinge shafts, the extension and retraction of the telescopic rod 14 can change the included angle between the two connecting rods 11 of the connecting rod unit, thereby making the radial direction of the annular frame larger or smaller. The deformation principle is similar to the Hoberman Sphere structure principle. In this way, by changing the radial size of the annular frame, it can adapt to the construction of storage tanks 1 with different diameters, and has strong versatility.

[0028] Unlike the above embodiments, this ring frame is used to carry the spraying equipment. The first hinge shaft 15 is connected to the spraying pipe 16, and the second hinge shaft 17 is connected to the second sliding sleeve 18. The spraying pipe 16 slides through the second sliding sleeve 18. The spraying pipe 16 can be used for sandblasting to remove rust or spraying paint to prevent corrosion on the inner wall of the storage tank 1. The spraying pipe 16 can be connected to an external feeding device through a feeding pipe.

[0029] The spray pipe 16 is rotatably connected to the first hinge shaft 15. The spray pipe 16 is controlled by a rotating device to rotate around its own axis. The end of the spray pipe 16 has a bent nozzle. Thus, the orientation of the nozzle can be adjusted by rotating the spray pipe 16. When the nozzle is facing left or right relative to the plane of the annular frame, the annular frame will be subjected to a tangential force, thereby allowing the lifting sleeve 13 to rotate relative to the column 2, so that the nozzle changes the spray position in the circumferential direction. When the nozzle is facing down or up, the annular frame does not rotate. At this time, since the annular frame can rotate under the reverse force of the nozzle, the rotating device on the base 7 can be eliminated. Moreover, since the annular frame has multiple nozzles in the circumferential direction, the annular frame does not need to rotate one full circle to achieve spraying of the entire circumference of the storage tank 1.

[0030] Furthermore, a first sleeve 19 is connected to the first hinge shaft 15, and the injection pipe 16 is slidably sleeved inside the first sleeve 19. The injection pipe 16 is fixed with locking rings 20 located on both sides of the first sleeve 19, thereby preventing the injection pipe 16 from moving relative to the first sleeve 19 in the axial direction.

[0031] A worm gear 21 is fixedly fitted on the injection pipe 16. The worm gear 21 cooperates with the worm 22. The worm 22 is controlled to rotate by a rotating device. The worm 22 is rotatably connected to the support rod 23. The support rod 23 is fixedly connected to the first sleeve 19.

[0032] The rotating device includes pulleys 24 coaxially connected to the worm gear 22. All the pulleys 24 are driven by the same transmission belt 25. The rotating device controls all the pulleys 24 to rotate synchronously through the transmission belt. One of the pulleys 24 can be driven to rotate by the drive motor 26, so that all the pulleys 24 rotate synchronously, thereby adjusting the orientation of all the nozzles.

[0033] Of course, the circular frame described in this embodiment can be used as a construction walkway. However, when used as a construction walkway, footboards need to be laid on the circular frame so that workers can stand on them.

[0034] Although this document uses a number of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention. The order of actions, steps, etc., in the apparatus and methods shown in the specification and drawings can be implemented in any order unless otherwise expressly specified, and provided that the output of a preceding process is not used in a subsequent process. Similar sequential terms used for descriptive convenience (e.g., "firstly," "next," "secondly," "again," "then," etc.) do not imply that the actions must be performed in such an order.

[0035] The specific embodiments described herein are merely illustrative examples illustrating the spirit of the invention. Those skilled in the art can make various modifications or additions to the described embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A construction device for corrosion protection of the inner wall of a vertical storage tank, characterized in that, The device includes a column for installation in the middle of a storage tank, on which a horizontal support extending from the column toward the inner wall of the storage tank is provided. The horizontal support is raised and lowered along the column by a lifting device, and rotated about the central axis of the column by a rotating device. The horizontal support includes a ring frame, which includes a linkage unit circumferentially connected relative to the column. The linkage unit includes two links connected together at the middle by a central hinge axis. The two links have bends at the middle. The bends of the two links in the circumferential direction of one linkage unit of the ring frame are opposite. The ends of the links of two adjacent circumferential linkage units are rotatably connected by a first hinge axis near the column and a second hinge axis away from the column, respectively. A lifting sleeve is slidably fitted on the column, and the ring frame and the lifting sleeve are connected by a telescopic rod. The first hinge shaft connects to the spray pipe, and the second hinge shaft connects to the second sliding sleeve, through which the spray pipe slides. The spray pipe is rotatably connected to the first hinge shaft, and its rotation around its own axis is controlled by a rotating device. The end of the spray pipe has a bent nozzle. A first sleeve is connected to the first hinge shaft, and the spray pipe slides within the first sleeve. A worm gear is fitted onto the spray pipe, and the worm gear engages with a worm. The worm is controlled to rotate by the rotating device. A pulley is coaxially connected to the worm, and all the pulleys engage with the same transmission belt. The rotating device controls all the pulleys to rotate synchronously via the transmission belt. The bent nozzle is inclined relative to the plane of the annular frame, so that the reaction force generated during spraying drives the annular frame to rotate around the central axis of the column.

2. The construction device for corrosion protection of the inner wall of a vertical storage tank according to claim 1, characterized in that, The horizontal support is a construction platform perpendicular to the column.

3. The construction device for corrosion protection of the inner wall of a vertical storage tank according to claim 2, characterized in that, The construction platform is a horizontal construction walkway. The middle of the construction walkway has a support frame fitted onto the column. Guide wheels are supported between the support frame and the column. The lifting device includes a traction rope suspending the support frame. The traction rope is controlled by a traction rope retraction device.

4. The construction device for corrosion protection of the inner wall of a vertical storage tank according to claim 1, characterized in that, The bottom of the column is rotatably supported on the base, and the column is controlled by a motor to rotate relative to the base.

5. The construction device for corrosion protection of the inner wall of a vertical storage tank according to claim 1, characterized in that, The ends of the telescopic rod are connected to the two central hinge shafts.

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