Low-stress transfer and groove protection device and method for allowance-free cylinder structure

Abstract

The low-stress transfer and groove protection device comprises a supporting ring, a plug block, a lower cross-shaped support, a stand column, an upper cross-shaped support, an ejector rod and a lifting lug, the plug block is assembled in a groove in the supporting ring, the lower cross-shaped support is arranged in the supporting ring, the stand column is arranged at the upper end of the lower cross-shaped support, and the ejector rod is arranged at the lower end of the lower cross-shaped support. An upper cross-shaped support is arranged at the upper end of the stand column, an ejector rod is assembled in a through hole of the stand column, and a lifting lug is arranged at the upper end of the upper cross-shaped support; the cylinder structure installed in the groove of the supporting ring is positioned through the plug block, the ejector rod spirally extends to abut against the inner wall of the cylinder structure, the cylinder structure is made to be in linkage with the device, and then the cylinder structure is transferred by lifting the lifting lugs of the device. The device is easy to operate, convenient to disassemble, assemble and maintain and high in safety, welding of the cylinder structure is avoided, and the adverse effect that the cylinder structure deforms or the manufacturing precision is reduced due to assembling and welding of the lifting lugs is effectively eliminated.

Description

Technical Field

[0001] The invention relates to a device in the technical field of pressure vessel structure manufacturing, in particular to a low-stress transfer and groove protection device and method for a cylindrical structure without excess. Background Art

[0002] In the manufacturing process of pressure vessel structures, it is often necessary to transfer cylindrical structures of various sizes. Since the diameter of the cylindrical structure is large, up to nearly 10 meters, the rigidity of the cylindrical structure itself is relatively weak. The precision requirements of the cylindrical structure itself are high, and the diameter deviation requirements have reached the millimeter level. If effective transfer conformal measures are not taken, there will be a great risk of deformation during transfer when multiple process stations such as machining are transferred after manufacturing.

[0003] There are usually two methods for traditional transportation. One is to weld a lifting lug on the circumferential seam of the upper end of the cylindrical structure with margin, and the other is to clamp the shell plate or rib of the cylindrical structure with a clamp. Both methods directly apply force to a certain point on the cylindrical structure, which will cause the stress of a certain part of the cylindrical structure to increase, and in severe cases, deformation during transportation may occur. At the same time, since most of the cylindrical structures today are built without margin, the upper and lower ends of the cylindrical structure have grooves. In order not to damage the grooves, the upper end cannot be welded with a lifting lug. Therefore, how to reduce the stress on the cylindrical structure during transportation, eliminate the transportation deformation of the cylindrical structure, and realize the conformal transportation of multi-specification cylindrical structures without margin, thereby improving the manufacturing accuracy and quality of the pressure vessel structure, has become an urgent problem to be solved. Summary of the invention

[0004] In order to realize low-stress transportation of a cylindrical structure without margin and protect the processed groove at the same time, the present invention provides a low-stress transportation and groove protection device and method for a cylindrical structure without margin. The device positions the cylindrical structure in the groove of the support ring through the cooperation of its various components, so that the cylindrical structure and the device are linked, and then the cylindrical structure is linked and transported by lifting the lifting lug of the device, solving the technical problem that the cylindrical structure without margin cannot be transported in a shape-preserving manner.

[0005] The solution adopted by the present invention to solve the technical problem is: A low-stress transfer and slope protection device for a cylindrical structure without excess, comprising a support ring, which is arranged on a horizontal plane, with a sealed bottom and a groove on the top, for installing and supporting the cylindrical structure; a plug block, which is assembled in the groove of the support ring and is arranged in pairs on the inner and outer sides of the four centers of the cylindrical structure; a lower cross support, which is fixed inside the support ring and whose connection points with the support ring are located at the four centers of the cylindrical structure; a column, which is fixed at the upper end of the lower cross support and has a through hole inside; an upper cross support, which is fixed at the upper end of the column and corresponds to the lower cross support; a push rod, which is assembled in the through hole of the column and can extend to the four centers of the cylindrical structure to tighten the cylindrical structure; a lifting ear, which is fixed at the upper end of the upper cross support, for lifting the cylindrical structure.

[0006] According to the embodiment disclosed herein, a groove protection material is provided in the groove of the support ring.

[0007] In the embodiment disclosed, the height of the column is slightly higher than the cylindrical structure, which is convenient for workers to perform construction work.

[0008] In the embodiment disclosed, the outer rod of the push rod is provided with an internal thread, and the inner rod is provided with an external thread, so that the push rod has a spiral telescopic function, and can achieve rapid tightening of the four centers of the cylindrical structure.

[0009] In order to further solve the technical problem to be solved by the present invention, the present invention provides a method for using a low-stress transfer and groove protection device with a non-residual cylindrical structure, comprising the following steps: Step 1. According to the diameter and height of the cylindrical structure, a transfer device adapted thereto is selected; Step 2. Check whether the groove protection material in the support ring groove is evenly arranged and whether there is an unprotected area. If so, fill the corresponding groove protection material in time; Step 3. Contract the push rod spirally and drop the cylindrical structure into the groove of the support ring; Step 4. Assemble the plugs in the gap between the cylindrical structure and the support ring, and arrange them in pairs on the inner and outer sides of the four centers of the cylindrical structure; Step 5. Extend the push rod spirally until it contacts and tightens against the inner wall of the cylindrical structure; Step 6. Test lift the lifting lugs, if there are no problems, proceed with the lifting process as normal.

[0010] Positive effects: The present invention assembles a plug in the groove on the support ring, arranges a lower cross support inside the support ring, arranges a column at the upper end of the lower cross support, arranges an upper cross support at the upper end of the column, assembles a push rod in the through hole of the column, and arranges a lifting lug at the upper end of the upper cross support. The cylindrical structure installed in the groove of the support ring is positioned by the plug, and the push rod is spirally extended to press against the inner wall of the cylindrical structure, so that the cylindrical structure and the device are linked, and then the lifting lug of the device is lifted to achieve the transportation of the cylindrical structure. This device is simple to operate, easy to disassemble and maintain, and has high safety. It avoids welding on the cylindrical structure, effectively eliminates the adverse effects of deformation of the cylindrical structure or reduction in manufacturing accuracy due to welding of the lifting lug, and achieves low-stress transportation of the cylindrical structure without margin and protects the processed groove. It is suitable for use as a low-stress transportation and groove protection device and method for a cylindrical structure without margin. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application; Figure 2 This is a schematic diagram of the assembly of an embodiment of the present application.

[0012] In the figure, 1. support ring, 2. plug block, 3. lower cross support, 4. column, 5. upper cross support, 6. top rod, 7. lifting ear, 8. cylindrical structure. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Although the embodiments of the present invention have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention.

[0014] As shown in the figure, a low-stress transfer and groove protection device with a non-residual cylindrical structure includes: A support ring 1 is arranged on a horizontal plane, with a sealed bottom and a groove on the top for installing and supporting the cylindrical structure 8; a plug 2 is assembled in the groove of the support ring 1 and is arranged in pairs on the inner and outer sides of the four centers of the cylindrical structure 8; a lower cross support 3 is fixedly arranged inside the support ring 1, and its connection point with the support ring 1 is located at the four centers of the cylindrical structure 8; a column 4 is fixedly arranged at the upper end of the lower cross support 3, with a through hole opened inside; an upper cross support 5 is fixedly arranged at the upper end of the column 4, corresponding to the lower cross support 3; a push rod 6 is assembled in the through hole of the column 4, can be extended to the four centers of the cylindrical structure 8, and is used to tighten the cylindrical structure 8; a lifting ear 7 is fixedly arranged at the upper end of the upper cross support 5, and is used to realize the lifting of the cylindrical structure 8.

[0015] Specifically, the support ring 1 is flat and thin in structure, with a sealed bottom and a groove on the top, in which the plugs 2 are installed to provide support for the cylindrical structure 8; the plugs 2 are assembled in pairs in the groove of the support ring 1, and are arranged on the inner and outer sides of the four centers of the cylindrical structure 8 to tighten the lower part of the cylindrical structure 8 and ensure that the key precision position of the cylindrical structure 8 does not move slightly; the four centers of the cylindrical structure 8 are the upper center, lower center, left center and right center of its horizontal cross section; the lower cross support 3 is fixedly arranged inside the support ring 1 by welding, and its connection points with the support ring 1 are located at the four centers of the cylindrical structure 8; the columns 4 are welded The upper cross support 5 is fixedly arranged at the upper end of the column 4 by welding, and its structural distribution state is parallel and corresponding to the lower cross support 3; a through hole is opened at the inner center of the column 4 toward the cylindrical structure 8 for assembling the push rod 6, so that the extension direction of the push rod 6 is toward the four centers of the cylindrical structure 8, which is beneficial to improve the stability of the push rod 6 when it is pressed against the cylindrical structure 8; the lifting ears 7 are fixedly arranged at the four corners of the upper end of the upper cross support 5 by welding, so as to realize the lifting of the cylindrical structure 8.

[0016] A groove protection material is provided in the groove of the support ring 1 .

[0017] Specifically, the groove protection material in the groove of the support ring 1 is usually made of soft materials such as hard rubber blocks and copper sheets.

[0018] The height of the column 4 is slightly higher than the cylindrical structure 8, which is convenient for workers to work.

[0019] Specifically, the height of the column 4 is slightly higher than the cylindrical structure 8, and the arrangement space between the plurality of columns 4 is relatively large, so that it is convenient for workers to walk in the space to perform construction work.

[0020] The outer rod of the push rod 6 is provided with an internal thread, and the inner rod thereof is provided with an external thread, so that the push rod 6 has a spiral telescopic function, and realizes rapid tightening of the four centers of the cylindrical structure 8.

[0021] Specifically, the outer rod of the push rod 6 is provided with an internal thread, and the inner rod thereof is provided with an external thread, and the threads between the two rods cooperate with each other, so that the push rod 6 has a spiral telescopic function; before the cylindrical structure 8 is assembled on the support ring 1, the outer rod of the push rod 6 is spirally contracted to avoid collision with the cylindrical structure 8; after the cylindrical structure 8 is assembled on the support ring 1, the outer rod of the push rod 6 is spirally extended to tighten the four centers of the cylindrical structure 8 to prevent the cylindrical structure 8 from moving, thereby ensuring the safety of the subsequent lifting stage.

[0022] The working process of this embodiment: A method for using a low-stress transfer and groove protection device with a non-residue cylindrical structure, comprising the following steps: Step 1. According to the diameter and height of the cylindrical structure 8, a transfer device adapted thereto is selected; Step 2. Check whether the groove protection material in the groove of the support ring 1 is evenly arranged and whether there is an unprotected area. If so, fill the corresponding groove protection material in time; Step 3. Screw the push rod 6 in a spiral manner and place the cylindrical structure 8 into the groove of the support ring 1; Step 4. Assemble the plugs 2 in the groove gap between the cylindrical structure 8 and the support ring 1, and arrange them in pairs on the inner and outer sides of the four centers of the cylindrical structure 8; Step 5. The push rod 6 is spirally extended until it contacts and presses against the inner wall of the cylindrical structure 8; Step 6. Test lift the lifting lug 7, if there is no problem, carry out the lifting process normally.

[0023] Features of the present invention: The present invention assembles a plug block 2 in the groove on the support ring 1, arranges a lower cross support 3 inside the support ring 1, arranges a column 4 at the upper end of the lower cross support 3, arranges an upper cross support 5 at the upper end of the column 4, assembles a push rod 6 in the through hole of the column 4, and arranges a lifting lug 7 at the upper end of the upper cross support 5. In actual use, the cylindrical structure 8 installed in the groove of the support ring 1 is positioned by the plug block 2, and the push rod 6 is spirally extended to press against the inner wall of the cylindrical structure 8, so that the cylindrical structure 8 and the device are linked, and then the lifting lug 7 of the device is lifted to realize the transportation of the cylindrical structure 8. Through this technical solution, it is possible to realize the low-stress transportation of the cylindrical structure 8 without excess and protect the processed groove, and the device is simple to operate, convenient to disassemble and maintain, and has high safety. It avoids welding the cylindrical structure 8, and effectively eliminates the adverse effects of deformation of the cylindrical structure 8 or reduced manufacturing accuracy due to welding the lifting lug 7.

[0024] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-stress transfer and groove protection device with a non-residue cylindrical structure, characterized in that: A support ring (1) is arranged on a horizontal plane, has a bottom seal at the bottom and a groove at the top, and is used to install and support the cylindrical structure (8); The plugs (2) are assembled in the groove of the support ring (1) and are arranged in pairs on the inner and outer sides of the four centers of the cylindrical structure (8); A lower cross support (3) is fixedly arranged inside the support ring (1), and its connection point with the support ring (1) is located at the four centers of the cylindrical structure (8); A column (4) is fixedly mounted on the upper end of the lower cross support (3) and has a through hole formed therein; An upper cross support (5) is fixedly mounted on the upper end of the column (4) and corresponds to the lower cross support (3); A push rod (6) is assembled in the through hole of the column (4) and can extend toward the four centers of the cylindrical structure (8) to tighten the cylindrical structure (8); A lifting lug (7) is fixedly arranged at the upper end of the upper cross support (5) and is used to lift the cylindrical structure (8).

2. According to claim 1, a low-stress transfer and groove protection device with a non-residual cylindrical structure, characterized in that: A groove protection material is provided in the groove of the support ring (1).

3. According to claim 2, a low-stress transfer and groove protection device with a non-residual cylindrical structure, characterized in that: The height of the upright column (4) is slightly higher than that of the cylindrical structure (8), which facilitates construction work by workers.

4. According to claim 3, a low-stress transfer and groove protection device with a cylindrical structure without excess, characterized in that: The outer rod of the push rod (6) is provided with an internal thread, and the inner rod thereof is provided with an external thread, so that the push rod (6) has a spiral telescopic function, thereby realizing rapid tightening of the four centers of the cylindrical structure (8).

5. A method for using a low-stress transfer and groove protection device with a non-residue cylindrical structure, characterized in that: According to claim 4, a low-stress transfer and groove protection device with a non-residual cylindrical structure comprises the following steps: Step 1. According to the diameter and height of the cylindrical structure (8), a transfer device adapted thereto is selected; Step 2. Check whether the groove protection material in the groove of the support ring (1) is evenly arranged and whether there is an unprotected area. If so, fill the corresponding groove protection material in time; Step 3. The push rod (6) is spirally contracted and placed into the groove of the support ring (1); Step 4. Assemble the plugs (2) in the gap between the cylindrical structure (8) and the support ring (1), and arrange them in pairs on the inner and outer sides of the four centers of the cylindrical structure (8); Step 5. The push rod (6) is spirally extended until it contacts and presses against the inner wall of the cylindrical structure (8); Step 6: Test lift the lifting lug (7). If there is no problem, carry out the lifting process normally.

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