Low-stress shape-preserving transfer device and method for double-web rib structure

Abstract

The invention provides a low-stress shape-preserving transfer device for a double-web rib structure and a method of the low-stress shape-preserving transfer device. The device comprises an outer frame, a lifting lug, a fixing rod connecting hole, a lower end web support, an upper end web support and a fixing rod. The outer frame comprises a vertical plate and a circular ring; the fixing rod connecting holes are circumferentially arrayed in the radial direction of the vertical plate and are axially distributed in the vertical plate; the lower end web supports are arranged in a circumferential array in the radial direction of the circular ring, and the uniform distribution positions correspond to the arrangement positions of the fixing rod connecting holes; the upper end web supports are of a threaded structure and are arranged in a circumferential array in the radial direction of the circular ring, and the height is adjusted through internal and external threads. The supports are arranged between the lower-end web and the upper-end web, the uniform distribution positions of the supports correspond to the arrangement positions of the lower-end web supports, and bolt holes are formed in the middle of the upper-end web supports; one end of a fixing rod penetrates through a bolt hole in the upper end web support and abuts against a panel of the double-web rib structure cylinder, and the other end of the fixing rod penetrates through a fixing rod connecting hole in the upper end web support and is connected with the vertical plate; the lifting lugs are circumferentially arrayed at the top end of the vertical plate.

Description

Technical Field

[0001] The invention relates to a double-web rib in the field of pressure vessels, and in particular to a low-stress conformal transport device and a method thereof for a double-web rib structure. Background Art

[0002] The manufacturing process of pressure vessel structures often involves the transportation of double-web ribs of various sizes. Due to the large diameter of the double-web rib structure, the maximum diameter can reach nearly 10 meters, and the long web, which can reach nearly 2 meters at most, the double-web rib structure itself has weak rigidity during transportation and hoisting. The double-web rib structure itself has high precision requirements, and the diameter and web verticality deviations reach the millimeter level. After production, it is necessary to convert multiple process stations such as web end surface machining. If effective transportation conformal measures are not taken, there is a great risk of deformation during transportation.

[0003] There are usually two methods for traditional transportation. One is to install welding lugs on the upper end of the double-web rib structure panel with excess space, and the other is to clamp the web of the double-web rib structure with a clamp.

[0004] However, the inventors of this application found that the above technology has at least the following technical problems in the process of implementing the technical solution of the invention in the embodiment of this application: Both methods directly apply a lifting force to a certain point on the double-web rib structure, which will cause a local stress increase in the double-web rib structure, and may cause lifting deformation in severe cases. At the same time, the double-web rib structure needs to be welded to the cylinder structure of the pressure vessel. The double-web rib structure itself and the web after welding have high vertical requirements, which puts higher requirements on lifting. It is necessary to control the lifting deformation of the two webs in the double-web rib structure.

[0005] How to reduce the lifting stress of the double-web rib structure of the pressure vessel and control the lifting deformation, thereby improving the manufacturing accuracy and quality of the pressure vessel structure has become an urgent structural problem. Summary of the invention

[0006] In order to solve the deficiencies in the prior art and to control the deformation of the double-web rib structure during hoisting, the embodiment of the present application provides a low-stress conformal transport device and method for the double-web rib structure. The method uses a low-stress conformal transport device for the double-web rib structure, sets a lower web support and an adjustable upper web support, and fixes the double-web rib structure without welding, effectively reducing the risk of deformation of the double-web rib structure during transportation, effectively improving the construction accuracy and quality of the double-web rib structure, and solving the technical problem of deformation of the double-web rib structure during hoisting.

[0007] The solution adopted by the embodiment of the present application to solve the technical problem is: A low-stress conformal transport device with a double-web rib structure, wherein the double-web rib structure comprises a lower web, an upper web and a cylinder, wherein the lower web and the upper web are sequentially mounted on the cylinder; It includes an outer frame, lifting ears, fixing rod connection holes, lower end web support, upper end web support and fixing rods; The outer frame is a cylindrical structure with a semi-closed bottom, including a vertical plate and a circular ring, which is used to accommodate the double-web rib structure. A circular ring is arranged at the bottom of the cylinder to support the double-web rib structure. The fixing rod connection holes are through-hole structures, arranged in a circular array in the radial direction of the vertical plate, and arranged and distributed in the axial direction of the vertical plate, uniformly distributed every 45° in the circumferential direction; The lower end web support is an internal and external thread lifting structure, which is arranged in a circular array on the radial direction of the ring, evenly distributed every 45° circumferentially, and the evenly distributed position corresponds to the arrangement position of the fixing rod connection hole; the lower part of the lower end web support is an internal thread structure, and the upper part is an external thread structure. The height is adjusted by thread lifting, and it is supported on the bottom surface of the lower end web of the double web rib structure; The upper web support is a threaded structure for adjusting the height at the upper and lower ends, which is arranged in a circumferential array in the radial direction of the ring, evenly distributed every 45°, and the height is adjusted through internal and external threads; the support is between the lower web and the upper web, and the evenly distributed position corresponds to the arrangement position of the lower web support, and the lower web and the upper web are supported at the same position; a bolt hole is provided in the middle of the upper web support; The fixing rod is a threaded shaft with a raised column head, one end of which passes through the bolt hole on the upper web support and rests against the panel of the double-web rib structure cylinder, and the other end passes through the fixing rod connection hole on the upper and is connected to the vertical plate; The lifting lugs are arranged in a circular array on the top of the vertical plate and are used to connect the lifting slings; Among them, the lower web support, the upper web support and the fixing rod are radially corresponding and axially collinear, and uniform force points are applied to the lower web and the upper web to reduce the deformation risk of the double web rib structure; the upper web support is limited and fixed without welding, and a lifting lug is provided on the top of the vertical plate of the outer frame.

[0008] In a preferred embodiment, the vertical plates of the outer frame are provided with lightening manholes in a circumferential array, which are staggered with the connecting holes of the fixing rods.

[0009] In a preferred embodiment, the fixing rod connection holes are evenly distributed at 45° in the circumferential direction on the vertical plate, with a total of eight rows, and five holes in each row.

[0010] In a preferred embodiment, a hard rubber or copper plate is provided on the upper top of the lower web support to contact the bottom surface of the lower web of the double web rib structure.

[0011] In a preferred embodiment, the upper web support includes a base, an adjustment nut and a top seat; The base is a boss structure, the bottom of which is located on the top surface of the lower end web, and an external thread is provided on the boss; The top seat is also a boss structure, the top of which contacts the bottom surface of the upper end web, and an external thread is arranged on the boss, and the external thread of the top seat is in the opposite direction to the external thread of the base; The adjusting nut is a long nut with an empty knife groove in the middle. The internal thread spiral lines at both ends of the adjusting nut are in opposite directions. When the adjusting nut is screwed with the base and the top seat respectively, the adjusting nut is rotated, and the base and the top seat rise and fall with it. A radial through hole is provided in the middle of the adjusting nut for assembling the fixing rod.

[0012] In a preferred embodiment, a rubber plate is provided on the top seat of the upper web support, and a flexible contact is formed at the contact position between the top seat of the upper web support and the bottom surface of the upper web.

[0013] In a preferred embodiment, the lifting ears are evenly distributed in a 90° circumferential direction on the vertical plate, and the number is four in total.

[0014] In order to further solve the technical problem to be solved by the embodiment of the present application, in a low-stress conformal transport method of a double-web rib structure provided in the embodiment of the present application, a low-stress conformal transport device of a double-web rib structure is applied, comprising the following steps: Step 1: According to the diameter and height of the double web rib structure, select the conformal transfer device suitable for transfer; before formal use, adjust the lower web support height on the semi-bottom structure of the conformal transfer device; Step 2: Mark the four centers of the cylinder of the double-web rib structure, hoist the double-web rib structure onto the device, and when the distance is about 200 mm, confirm that the four centers of the double-web rib structure are accurately aligned with the lower end web support, and then drop the double-web rib structure to ensure that the four centers of the double-web rib structure are effectively supported; the four centers include the upper center, the lower center, the left center, and the right center, which are the positioning references for the subsequent assembly of the double-web rib structure; Step 3: accurately adjust the lower web support to effectively support the lower web by reducing the manhole. At the same time, arrange the upper web support in a vertically collinear position with the lower web support space by reducing the manhole, and adjust the height; Step 4: On one hand, pass the fixing rod through the bolt hole in the middle of the upper web support device and lean it against the panel of the double web rib structure; on the other hand, pass it through the fixing rod connection hole on the vertical plate of the outer frame to connect and fix it; insert the rubber plate on the top of the upper web support to fix the upper web support device; Step 5. Select appropriate slings according to the weight of the double-web rib structure to be hoisted, ensure that the slings are of the same length, connect the slings to the lifting lugs, and check the connection before formal lifting. When lifting about 300mm for the first time, stop slowly to check the four-center protection of the cylinder of the double-web rib structure and the horizontal posture of the cylinder. After that, proceed with the transfer.

[0015] Positive effects: The technical solution provided in the embodiments of the present application has at least the following technical effects or advantages: 1. Since the embodiment of the present application adopts the technical means of limiting and fixing the circular array of lifting ears at the top of the vertical plate and the upper web support without welding, welding is not required on the double-web rib structure panel, avoiding local stress increase and hidden dangers of deformation during lifting, and effectively solving the technical problem of low-stress conformal transportation of the double-web rib structure in the prior art, thereby achieving the technical effect of eliminating the adverse effects of welding on the double-web rib structure causing deformation or performance reduction.

[0016] 2. Since the embodiment of the present application adopts the technical means of radial correspondence and axial colinearity of the lower web support, the upper web support and the fixing rod, the uniform force points applied on the lower web and the upper web correspond to each other, which effectively solves the technical problem of low-stress conformal transportation of the double-web rib structure in the prior art, effectively ensures the verticality of the web of the double-web rib structure, reduces the deformation risk of the double-web rib structure, and thus achieves the technical effect of ensuring the assembly accuracy of the double-web rib structure.

[0017] 3. Since the embodiment of the present application adopts a technical means in which one end of the fixing rod passes through the bolt hole on the upper web support and rests on the panel of the double-web rib structure cylinder, and the other end passes through the fixing rod connecting hole on it and is connected to the vertical plate, the upper web support is limited and fixed without welding, which effectively solves the technical problem of low-stress conformal transportation of the double-web rib structure in the prior art. The upper web support is firmly clamped without the risk of loosening and slipping, thereby achieving a technical effect of high operational safety.

[0018] 4. Since the embodiment of the present application adopts the technical means that the external thread of the top seat and the external thread of the base are in opposite directions, and the internal thread spiral lines at both ends of the adjusting nut are in opposite directions, when the adjusting nut is respectively screwed with the base and the top seat, the adjusting nut is rotated, and the base and the top seat rise and fall with it, which effectively solves the technical problem of low-stress conformal transportation of the double-web rib structure in the prior art, effectively ensures the verticality of the web of the double-web rib structure, reduces the deformation risk of the double-web rib structure, and thus achieves the technical effect of ensuring the assembly accuracy of the double-web rib structure.

[0019] The invention is suitable for application as a low-stress conformal transport device and method for a double-web rib structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a schematic diagram of the double-web rib structure; Figure 2 This is a schematic diagram of the structure of this embodiment; Figure 3 This is a schematic diagram of the working state of this embodiment; Figure 4 This is a schematic diagram of the main structure of the upper web support; Figure 5 Schematic diagram of the top view of the upper web support structure.

[0022] In the figure: 0. Double web rib structure, 01. Lower web, 02. Upper web, 03. Cylinder, 1. Outer frame, 11. Vertical plate, 111. Lightening manhole, 12. Ring, 2. Lifting lugs, 3.Fix rod connection hole, 4. Lower end belly plate support, 5. Upper web support, 51. Base, 52. Adjusting nut, 53. Top seat, 6. Fixing rod. DETAILED DESCRIPTION

[0023] 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 in 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.

[0024] The embodiment of the present application solves the problem that the double-web rib structure is prone to deformation during lifting applications in the prior art by providing a low-stress conformal transfer device and method for a double-web rib structure. In the low-stress conformal transfer device for a double-web rib structure, a lower web support, an upper web support and a fixing rod are radially corresponding and axially collinear, and uniform force points are applied to the lower web and the upper web to reduce the risk of deformation of the double-web rib structure. A lifting lug is provided on the top of the vertical plate of the outer frame, which solves the problem of no welding on the panel of the double-web rib structure and achieves the technical effect of avoiding local stress increase and the hidden danger of lifting deformation.

[0025] As shown in the figure, the double-web rib structure 0 includes a lower web 01, an upper web 02 and a cylinder 03; the lower web 01 and the upper web 02 are sequentially mounted on the cylinder 03.

[0026] A low-stress conformal transport device with a double web rib structure, comprising an outer frame 1, a lifting lug 2, a fixing rod connection hole 3, a lower web support 4, an upper web support 5 and a fixing rod 6; The outer frame 1 is a cylindrical 03 structure with a semi-closed bottom, including a vertical plate 11 and a circular ring 12. The vertical plate 11 covers the double-web rib structure 0 and is used to accommodate the double-web rib structure 0. The circular ring 12 is arranged at the bottom of the cylinder to bear the load of the double-web rib structure 0 and is used to support the double-web rib structure 0. The fixing rod connection holes 3 are through-hole structures, arranged in a circumferential array in the radial direction of the vertical plate 11, and arranged and distributed in the axial direction of the vertical plate 11, and evenly distributed every 45° in the circumferential direction; The lower end web support 4 is an internal and external thread lifting structure, which is arranged in a circumferential array in the radial direction of the ring 12, evenly distributed every 45° circumferentially, and the evenly distributed position corresponds to the arrangement position of the fixing rod connection hole 3; the lower part of the lower end web support 4 is an internal thread structure, which is welded and fixed on the ring 12, and the upper part is an external thread structure, the height is adjusted by thread lifting, and it is supported on the bottom surface of the lower end web 01 of the double web rib structure 0; The upper web support 5 is a threaded structure for adjusting the height at the upper and lower ends, which is arranged in a circumferential array in the radial direction of the ring 12, evenly distributed every 45° circumferentially, and the height is adjusted by internal and external threads; it is supported between the lower web 01 and the upper web 02, and the evenly distributed position corresponds to the arrangement position of the lower web support 4, ensuring that the double webs are supported in the same position, thereby improving the conformal effect; a bolt hole is provided in the middle of the upper web support 5; The fixing rod 6 is a threaded shaft with a raised column head, one end of which passes through the bolt hole on the upper web support 5 and rests on the panel of the double web rib structure 0 cylinder 03, and the other end passes through the fixing rod connection hole 3 on the upper and is connected to the vertical plate 11. By selecting the fixing rod connection holes 3 of different heights, the upper web support 5 can be fixed in a limited position without welding; The lifting lugs 2 are arranged in a circular array at the top of the vertical plate 11, and are used to connect the lifting slings, and then to carry the outer frame 1, so as to realize the lifting of the double-web rib structure 0; the load borne by the lifting lugs 2 matches the weight of the double-web rib structure 0 being transported; Among them, the lower web support 4, the upper web support 5 and the fixing rod 6 are radially corresponding and axially collinear, and uniform force points are applied to the lower web 01 and the upper web 02 respectively, reducing the deformation risk of the double web rib structure 0; the upper web support 5 is limited and fixed without welding. At the same time, a lifting ear 2 is provided on the top of the vertical plate 11 of the outer frame 1, avoiding the need to weld the lifting ear 2 on the upper end of the double web rib structure 0 panel, and then the double web rib structure 0 does not need to be welded, thereby solving the problem of local stress increase and the hidden danger of deformation during lifting.

[0027] In order to ensure the stability of the structure of this embodiment, a circular array of lightening manholes 111 is provided on the vertical plate 11 of the outer frame 1, which are staggered with the fixing rod connecting holes 3. One is used to reduce the weight of the device, and the other is used to provide construction space for construction personnel to facilitate adjustment of the specific position of the upper web support 5 and support fixation.

[0028] In this embodiment, the lightening manholes 111 are evenly distributed at 45° in the circumferential direction on the vertical plate 11 , and the number is eight in total.

[0029] In order to further ensure the stability of the structure of this embodiment, in this embodiment, the fixing rod connection holes 3 are evenly distributed on the vertical plate 11 at an angle of 45° in the circumferential direction, with a total of eight rows, and five holes in each row.

[0030] In order to optimize the structure of this embodiment, a hard rubber or copper plate is provided on the upper top of the lower web support 4 to contact the bottom surface of the lower web 01 of the double web rib structure 0 to prevent the contact part from scratching the surface of the lower web 01 of the double web rib structure 0.

[0031] In order to further optimize the structure of this embodiment, the upper web support 5 includes a base 51, an adjustment nut 52 and a top seat 53; The base 51 is a boss structure, the bottom of which is located on the top surface of the lower end web 01, and an external thread is provided on the boss; The top seat 53 is also a boss structure, the top of which contacts the bottom surface of the upper web 02, and an external thread is provided on the boss, and the external thread of the top seat 53 is in the opposite direction to the external thread of the base 51; The adjusting nut 52 is a long nut with an empty knife groove in the middle. The internal thread spiral lines at both ends of the adjusting nut 52 are in opposite directions. When the adjusting nut 52 is screwed with the base 51 and the top seat 53 respectively, the adjusting nut 52 is rotated, and the base 51 and the top seat 53 rise and fall with it. A radial through hole is provided in the middle of the adjusting nut 52 for assembling the fixing rod 6.

[0032] In this embodiment, the upper web supports 5 are evenly distributed at 45° in the circumferential direction on the upper web 02, and there are eight of them in total.

[0033] In order to further optimize the structure of this embodiment, a rubber plate is provided on the top seat 53 of the upper web support 5 to form a flexible contact between the top seat 53 of the upper web support 5 and the bottom surface of the upper web 02 to enhance the stability of the support.

[0034] As a conventional technical option, the lifting ears 2 are evenly distributed on the vertical plate 11 at 90° in the circumferential direction, and the number is four in total.

[0035] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: Since the circular array of lifting ears 2 is limited and fixed at the top of the vertical plate 11 and the upper web support 5 without welding, no welding is required on the panel of the double-web rib structure 0, avoiding local stress increase and hidden dangers of lifting deformation, and eliminating the adverse effects of welding on the double-web rib structure 0 causing deformation or performance reduction.

[0036] Since the lower web support 4, the upper web support 5 and the fixing rod 6 correspond in radial direction and are axially collinear, the uniform force points applied on the lower web 01 and the upper web 02 correspond to each other, effectively ensuring the verticality of the web of the double web rib structure 0, reducing the deformation risk of the double web rib structure 0, and ensuring the assembly accuracy of the double web rib structure 0.

[0037] Since one end of the fixing rod 6 passes through the bolt hole on the upper web support 5 and rests on the panel of the double web rib structure 0 cylinder 03, and the other end passes through the fixing rod connecting hole 3 on it and is connected to the vertical plate 11; therefore, the upper web support 5 is limited and fixed without welding; the upper web support 5 is firmly clamped without the risk of loosening or slipping, and the operation safety is high.

[0038] Since the external thread of the top seat 53 and the external thread of the base 51 are in opposite directions, and the internal thread spiral lines at both ends of the adjusting nut 52 are in opposite directions, when the adjusting nut 52 is screwed with the base 51 and the top seat 53 respectively, the adjusting nut 52 is rotated, and the base 51 and the top seat 53 rise and fall with it, effectively ensuring the verticality of the web of the double-web rib structure 0, reducing the deformation risk of the double-web rib structure 0, and ensuring the assembly accuracy of the double-web rib structure 0.

[0039] The working process of this embodiment: Take the double web rib structure 0 with a web height of 1.5 meters and a panel diameter of 8 meters as an example.

[0040] (1) According to the diameter and height of the double web rib structure 0, select the appropriate conformal transfer device for transfer. Adjust the height of the lower web support 4 on the semi-bottom structure of the conformal transfer device before formal use. If the height is not appropriate, it needs to be adjusted in time.

[0041] (2) Mark the four centers of the cylinder 03 of the double-web rib structure 0, hoist the double-web rib structure 0 onto the device, and when the distance is about 200 mm, confirm that the four centers of the double-web rib structure 0 are accurately aligned with the lower end web support 4, then drop the double-web rib structure 0 to ensure that the four centers of the double-web rib structure 0 are effectively supported; the four centers include the upper center, lower center, left center and right center, which are the positioning references for the subsequent assembly of the double-web rib structure 0.

[0042] (3) The lower web support 4 is accurately adjusted to effectively support the lower web 01 by reducing the manhole 111. At the same time, the upper web support 5 is arranged in a vertically collinear position with the lower web support 4 in space by reducing the manhole 111, and the height is adjusted.

[0043] (4) On one hand, the fixing rod 6 is passed through the bolt hole in the middle of the upper web support 5 device and rests against the panel of the double web rib structure 0; on the other hand, it is passed through the fixing rod connecting hole 3 on the vertical plate 11 of the outer frame 1 to connect and fix; a rubber sheet is inserted into the top of the upper web support 5 to ensure better fixation of the upper web support 5 device.

[0044] (5) Select appropriate slings according to the weight of the double-web rib structure 0 to be hoisted, ensure that the length of the slings is the same, connect the slings to the lifting lugs 2, and check the connection before formal lifting. When the first lifting is about 300mm, stop slowly to check the four-center protection of the cylinder 03 of the double-web rib structure 0 and the horizontal posture of the cylinder 03. After that, transfer.

[0045] It is worth noting that the contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of the fixing rod 6 and the lifting ear 2 are not specifically limited and can be determined using conventional equipment. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0046] 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 conformal transport device with a double-web rib structure, the double-web rib structure (0) comprising a lower web (01), an upper web (02) and a cylinder (03), wherein the lower web (01) and the upper web (02) are sequentially mounted on the cylinder (03); the characteristics are: It comprises an outer frame (1), a lifting lug (2), a fixing rod connection hole (3), a lower end web support (4), an upper end web support (5) and a fixing rod (6); The outer frame (1) is a cylindrical (03) structure with a semi-closed bottom surface, comprising a vertical plate (11) and a circular ring (12) for accommodating the double-web rib structure (0); a circular ring (12) is provided at the bottom of the cylinder for supporting the double-web rib structure (0); The fixing rod connection holes (3) are through-hole structures, arranged in a circumferential array in the radial direction of the vertical plate (11), and arranged and distributed in the axial direction of the vertical plate (11), and evenly distributed every 45° in the circumferential direction; The lower end web support (4) is an internal and external thread lifting structure, which is arranged in a circumferential array on the radial direction of the ring (12), evenly distributed every 45° in the circumferential direction, and the evenly distributed position corresponds to the arrangement position of the fixing rod connection hole (3); the lower part of the lower end web support (4) is an internal thread structure, and the upper part is an external thread structure, and the height is adjusted by thread lifting, and it is supported on the bottom surface of the lower end web (01) of the double web rib structure (0); The upper web support (5) is a threaded structure for adjusting the height at the upper and lower ends, and is arranged in a circumferential array on the radial direction of the ring (12), evenly distributed every 45° in the circumferential direction, and the height is adjusted by internal and external threads; it is supported between the lower web (01) and the upper web (02), and the evenly distributed position corresponds to the arrangement position of the lower web support (4), and the lower web (01) and the upper web (02) are supported at the same position; a bolt hole is provided in the middle of the upper web support (5); The fixing rod (6) is a threaded shaft with a raised column head, one end of which passes through a bolt hole on the upper web support (5) and rests against the panel of the cylinder (03) of the double web rib structure (0), and the other end of which passes through the fixing rod connection hole (3) on the upper side and is connected to the vertical plate (11); The lifting ears (2) are arranged in a circular array at the top of the vertical plate (11) and are used to connect the lifting slings; The lower web support (4), the upper web support (5) and the fixing rod (6) correspond in radial direction and are axially colinear, and evenly applied stress points are applied to the lower web (01) and the upper web (02) to reduce the deformation risk of the double web rib structure (0); the upper web support (5) is fixed in position without welding, and a lifting lug (2) is provided at the top of the vertical plate (11) of the outer frame (1).

2. A low stress conformal transport device with double web rib structure according to claim 1, characterized in that: A circular array of lightening manholes (111) is provided on the vertical plate (11) of the outer frame (1), which are staggeredly distributed with the fixing rod connection holes (3).

3. The low stress conformal transport device with double web rib structure according to claim 2, characterized in that: The fixing rod connection holes (3) are evenly distributed at 45° in the circumferential direction on the vertical plate (11), with a total of eight rows, and five holes in each row.

4. A low stress conformal transport device with double web rib structure according to claim 3, characterized in that: The upper top of the lower end web support (4) is provided with hard rubber or a copper plate which contacts the bottom surface of the lower end web (01) of the double web rib structure (0).

5. The low stress conformal transport device with double web rib structure according to claim 4, characterized in that: The upper web support (5) comprises a base (51), an adjustment nut (52) and a top seat (53); The base (51) is a boss structure, the bottom of which is located on the top surface of the lower end web (01), and an external thread is provided on the boss; The top seat (53) is also a boss structure, the top of which contacts the bottom surface of the upper web (02), and an external thread is provided on the boss, and the external thread of the top seat (53) is in the opposite direction to the external thread of the base (51); The adjusting nut (52) is a long nut having an empty knife groove in the middle. The internal screw threads at both ends of the adjusting nut (52) are in opposite directions. When the adjusting nut (52) is screwed to the base (51) and the top seat (53) respectively, the adjusting nut (52) is rotated, and the base (51) and the top seat (53) rise and fall with it. A radially penetrating through hole is provided in the middle of the adjusting nut (52) for assembling the fixing rod (6).

6. A low stress conformal transport device with double web rib structure according to claim 5, characterized in that: A rubber plate is provided on the top seat (53) of the upper web support (5), and a flexible contact is formed at the contact position between the top seat (53) of the upper web support (5) and the bottom surface of the upper web (02).

7. The low stress conformal transport device with double web rib structure according to claim 6, characterized in that: The lifting ears (2) are evenly distributed in a 90° circumferential direction on the vertical plate (11), and the number is four in total.

8. A low stress conformal transport method for a double web rib structure, characterized by: The low stress conformal transport device with double web rib structure as claimed in claim 7 comprises the following steps: Step 1: According to the diameter and height of the double web rib structure (0), a suitable conformal transfer device is selected for transfer; before formal use, the height of the lower web support (4) on the semi-bottom structure of the conformal transfer device is adjusted; Step 2: Mark the four centers of the cylinder (03) of the double-web rib structure (0), and hoist the double-web rib structure (0) onto the device. When the distance is about 200 mm, confirm that the four centers of the double-web rib structure (0) are accurately aligned with the lower end web support (4), and then drop the double-web rib structure (0) to ensure that the four centers of the double-web rib structure (0) are effectively supported. The four centers include the upper center, the lower center, the left center, and the right center, which are the positioning references for the subsequent assembly of the double-web rib structure (0). Step 3: accurately adjust the lower web support (4) to effectively support the lower web (01) through the lightening manhole (111); at the same time, arrange the upper web support (5) at a vertically collinear position with the lower web support (4) through the lightening manhole (111), and adjust the height; Step 4: On one hand, the fixing rod (6) is passed through the bolt hole in the middle of the upper web support (5) device and rests against the panel of the double web rib structure (0); on the other hand, it is passed through the fixing rod connection hole (3) on the vertical plate (11) of the outer frame (1) to connect and fix; a rubber plate is inserted into the top of the upper web support (5) to fix the upper web support (5) device; Step 5: Select appropriate slings according to the weight of the double-web rib structure (0) to be hoisted, ensure that the lengths of the slings are the same, connect the slings to the lifting lugs (2), and check the connection before formal lifting. When the first lifting is about 300 mm, stop slowly to check the four-center protection of the cylinder (03) of the double-web rib structure (0) and the horizontal posture of the cylinder (03). After that, transfer.

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