Storage tank preparation auxiliary device

Abstract

According to the storage tank preparation auxiliary device, a plurality of lifting assemblies are distributed in the circumferential direction of an annular tank plate at intervals, each lifting assembly is provided with a lifting part which can ascend and descend and is used for being connected with the annular tank plate, and a supporting ring is supported on the multiple lifting parts to be connected and coaxially abuts against the inner circumferential wall of the annular tank plate. The supporting ring comprises a plurality of arc-shaped abutting sections and transition sections, the arc-shaped abutting sections and the transition sections are alternately connected in a bolted mode in the circumferential direction, the telescopic pieces are sequentially connected with every two adjacent arc-shaped abutting sections in the circumferential direction of the annular tank plate, each telescopic piece is provided with two ends connected with the two adjacent arc-shaped abutting sections respectively, and the telescopic pieces extend to enable the outer diameter of the supporting ring to be increased. The contact tightness and coaxiality of the supporting ring and the annular tank plate are improved, the welding efficiency and quality of the annular tank plate are improved, the quality and preparation efficiency of the finally obtained storage tank are improved, and the technical problem that the preparation quality and efficiency of the storage tank are affected is solved to a certain extent.

Description

Technical Field

[0001] The present application belongs to the technical field of storage tank preparation, and in particular relates to a storage tank preparation auxiliary device. Background Art

[0002] Steel storage tanks are a widely used storage equipment and can be prepared by welding. For larger storage tanks, both upright and inverted welding methods can be used. The inverted welding method is safer and more efficient.

[0003] Currently, when using the inverted assembly method to fabricate tank walls, a coaxially fixed support ring is installed on the inner circumference of the assembled annular tank plate. The support ring is then lifted using a lifting device to raise the annular tank plate to a certain height for welding. The coaxiality between the support ring and the annular tank plate may not be good enough. This poor coaxiality can easily affect the center of gravity of the annular tank plate during the lifting process, affecting the quality and efficiency of tank fabrication. Utility Model Content

[0004] The present application aims to at least to some extent solve the technical problem of the quality and efficiency of storage tank preparation being affected. To this end, the present application provides a storage tank preparation auxiliary device.

[0005] The embodiment of the present application provides a storage tank preparation auxiliary device for supporting and lifting the annular tank plate of the storage tank, comprising:

[0006] A plurality of lifting assemblies are distributed at intervals along the circumference of the annular tank plate, and the lifting assemblies are provided with lifting parts that can be raised and lowered and are used to connect with the annular tank plate;

[0007] a support ring, supported by the plurality of lifting portions and coaxially abutting against the inner circumferential wall of the annular tank plate, the support ring comprising a plurality of arcuate abutting sections and transition sections bolted alternately along the circumferential direction;

[0008] A plurality of telescopic members are sequentially connected to each two adjacent arc-shaped abutting sections along the circumferential direction, and each of the telescopic members is provided with two ends respectively connected to the two adjacent arc-shaped abutting sections.

[0009] In some or certain embodiments, the central angle corresponding to the arc-shaped abutment segment is greater than the central angle corresponding to the transition segment.

[0010] In some or certain embodiments, the telescopic members are located between two adjacent arc-shaped abutting sections, the telescopic directions of the telescopic members are located in the same plane, and the telescopic directions are parallel to the end face of the annular tank plate.

[0011] In some or certain embodiments, there is a millimeter-level spacing between the transition segment and the two corresponding bolted arc-shaped abutting segments.

[0012] In some or certain embodiments, the arcuate abutment section and the transition section are both plate-shaped, the cross-section of the arcuate abutment section is U-shaped, and the support ring is also provided with a reinforcing rib plate fixedly connected to the arcuate abutment section and used for spot welding connection with the annular tank plate.

[0013] In some or certain embodiments, the lifting portion is provided with a limiting groove extending through the lifting portion along the circumferential direction, the limiting groove is used for the support ring to pass through and is provided with an opening facing the annular tank plate.

[0014] In some or certain embodiments, the lifting assembly includes:

[0015] Support members;

[0016] The lifting mechanism is provided with a connection end connected to the support member and a lifting hook which can be raised and lowered relative to the connection end, and the lifting hook is hooked with the lifting part.

[0017] In some or certain embodiments, the lifting mechanism is a chain hoist.

[0018] In some or certain embodiments, the support member comprises:

[0019] Bottom support;

[0020] A columnar portion and a top portion, wherein two ends of the columnar portion are respectively connected to the bottom support and the top portion, the top portion is wider than the columnar portion, and the top portion is connected to the connecting end;

[0021] The support rod has an included angle between its axis and the columnar portion, one end of the support rod is connected to the top, and the other end is used to support the bottom of the tank.

[0022] In some or certain embodiments, the tank preparation auxiliary device further comprises:

[0023] A plurality of auxiliary clamping plates are used for spot welding to the annular tank plate at intervals along the circumference of the annular tank plate, and two of the auxiliary clamping plates are used for clamping one of the arc-shaped abutting sections.

[0024] Advantageous effects provided by one or more embodiments of the present application:

[0025] During the preparation of a storage tank, the lifting and welding of an annular tank plate is involved. Multiple lifting assemblies in the tank preparation auxiliary device can be spaced apart along the circumference of the annular tank plate. Each lifting assembly has a lifting portion that can be raised and lowered and connected to the annular tank plate. A support ring is supported by the multiple lifting portions and coaxially abuts the inner circumferential wall of the annular tank plate. The support ring provides abutment and support against the inner circumferential wall of the annular tank plate to stabilize the center of gravity of the support ring. The lifting portions of the multiple lifting assemblies can all be connected to the annular tank plate and can be raised or lowered, allowing the annular tank plate to be stably lifted before welding. The support ring includes a plurality of arc-shaped abutting sections and transition sections bolted alternately along the circumference, and a plurality of telescopic parts sequentially connect each two adjacent arc-shaped abutting sections along the circumference of the annular tank plate, and each telescopic part is provided with two ends respectively connected to the two adjacent arc-shaped abutting sections. The support ring formed by bolting the plurality of arc-shaped abutting sections and the transition section can have a certain adjustment space. If the telescopic part is extended, the distance between the two adjacent arc-shaped abutting sections can be slightly increased, so that the outer diameter of the support ring is increased, the contact between the support ring and the inner circumferential wall of the annular tank plate is closer, and the coaxiality between the support ring and the annular tank plate is improved, so that the center of gravity and the shape of the annular tank plate during the lifting process are more stable, which is beneficial to improving the welding efficiency and quality of the annular tank plate, so as to improve the quality and preparation efficiency of the final storage tank, and to a certain extent solve the technical problems that affect the quality and efficiency of storage tank preparation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 A schematic diagram of the use status of a storage tank preparation auxiliary device in some embodiments or certain embodiments of the present application is shown.

[0028] Figure 2 A top view of a tank preparation auxiliary device in some embodiments or certain embodiments of the present application is shown.

[0029] Figure 3 A partial structural schematic diagram of a storage tank preparation auxiliary device in some embodiments or certain embodiments of the present application is shown.

[0030] Explanation of the accompanying reference numerals: 1. Lifting assembly; 11. Lifting part; 111. Limiting groove; 12. Support member; 121. Bottom support; 122. Columnar part; 123. Top; 124. Support rod; 13. Lifting mechanism; 131. Connecting end; 132. Lifting hook; 2. Support ring; 21. Arc-shaped abutment section; 22. Transition section; 23. Bolt; 24. Reinforcing rib plate; 3. Telescopic member; 10. Storage tank; 101. Annular tank plate; 102. Tank bottom; 103. Tank top. DETAILED DESCRIPTION

[0031] 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 embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0033] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0034] In addition, in this utility model, the descriptions of "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0035] In the related art, when preparing the tank wall of a storage tank using the inverted assembly method, a support ring is coaxially fixed to the inner circumferential wall of the assembled annular tank plate, and then a lifting device is used to lift the support ring to lift the annular tank plate to a certain height for welding. The support ring is usually a rigid structure with small deformation. The contact between the support ring and the annular tank wall of the storage tank may not be tight enough, and the coaxiality between the support ring and the annular tank wall is not good enough. In the process of lifting the annular tank wall, the center of gravity of the annular tank wall is easily affected, and the state of the annular tank wall itself is not stable enough, which is easy to affect the subsequent welding efficiency and quality of the annular tank wall. There is a technical problem that affects the quality and efficiency of the final storage tank preparation. The embodiment of the present application provides a storage tank preparation auxiliary device, which can at least solve the above technical problems to a certain extent.

[0036] The present application will be described below with reference to the accompanying drawings:

[0037] Figure 1 A schematic diagram showing a state of use of a storage tank preparation auxiliary device in some embodiments or certain embodiments of the present application is shown. Figure 2 A top view of a storage tank preparation auxiliary device in some embodiments or certain embodiments of the present application is shown. Figure 3 A partial structural diagram of a storage tank preparation auxiliary device in some embodiments or certain embodiments of the present application is shown, combined with Figures 1 to 3 The embodiment of the present application provides a storage tank preparation auxiliary device for supporting and lifting the annular tank plate 101 of the storage tank 10, comprising:

[0038] A plurality of lifting assemblies 1 are distributed at intervals along the circumference of the annular tank plate 101 . The lifting assemblies 1 are provided with a lifting portion 11 which can be raised and lowered and is used to be connected to the annular tank plate 101 .

[0039] The support ring 2 is supported by a plurality of lifting portions 11 and coaxially abuts against the inner circumferential wall of the annular tank plate 101. The support ring 2 includes a plurality of arcuate abutting sections 21 and transition sections 22 bolted alternately along the circumferential direction.

[0040] The plurality of telescopic members 3 sequentially connects every two adjacent arc-shaped abutting sections 21 along the circumferential direction, and each telescopic member 3 is provided with two ends respectively connected to the two adjacent arc-shaped abutting sections 21 .

[0041] During the preparation of the storage tank 10, the lifting and welding of the annular tank plate 101 is involved. Multiple lifting assemblies 1 in the storage tank preparation auxiliary device can be distributed at intervals along the circumference of the annular tank plate 101. Each lifting assembly 1 is provided with a lifting portion 11 that can be raised and lowered and used to connect to the annular tank plate 101. A support ring 2 is supported by the multiple lifting portions 11 and is coaxially abutted against the inner circumferential wall of the annular tank plate 101. The support ring 2 abuts and supports the inner circumferential wall of the annular tank plate 101 to stabilize the center of gravity of the support ring 2. The lifting portions 11 of the multiple lifting assemblies 1 can all be connected to the annular tank plate 101 and can be raised or lowered, so that the annular tank plate 101 is stably lifted before welding the annular tank plate 101. The support ring 2 includes a plurality of arc-shaped abutting sections 21 and transition sections 22 bolted alternately along the circumferential direction, and a plurality of telescopic parts 3 sequentially connect every two adjacent arc-shaped abutting sections 21 along the circumference of the annular tank plate 101, and each telescopic part 3 is provided with two ends connected to the two adjacent arc-shaped abutting sections 21 respectively. The support ring 2 formed by the bolting of the plurality of arc-shaped abutting sections 21 and the transition section 22 can have a certain adjustment space. If the telescopic part 3 is extended, the distance between the two adjacent arc-shaped abutting sections 21 can be slightly increased, so that the outer diameter of the support ring 2 is increased, the contact between the support ring 2 and the inner circumferential wall of the annular tank plate 101 is closer, and the coaxiality between the support ring 2 and the annular tank plate 101 is improved, so that the center of gravity and the shape of the annular tank plate 101 during the lifting process are more stable, which is beneficial to improving the welding efficiency and quality of the annular tank plate 101, so as to improve the quality and preparation efficiency of the final storage tank 10, and to a certain extent solve the technical problem that the preparation quality and efficiency of the storage tank 10 are affected.

[0042] Moreover, since the telescopic member 3 is retractable, the outer diameter of the support ring 2 can be adjusted within a certain range, and the support ring 2 can also be adapted to annular tank walls within a certain inner diameter range, which is also beneficial to improving the versatility of the tank preparation auxiliary device.

[0043] In some or certain embodiments, the central angle corresponding to the arc-shaped abutting section 21 is greater than the central angle corresponding to the transition section 22 .

[0044] The central angle corresponding to the arc-shaped abutment section 21 is greater than the central angle corresponding to the transition section 22, which is beneficial to increasing the contact area between the support ring 2 and the annular tank wall, improving the contact tightness and coaxiality between the support ring 2 and the annular tank wall, and is beneficial to improving the welding efficiency and welding quality of the final annular tank wall.

[0045] In some or certain embodiments, the central angle of the arc-shaped abutting section 21 may be 2 to 3 times the central angle of the transition section 22. The resulting storage tank 10 is of good quality.

[0046] In some or certain embodiments, the central angle of the arcuate abutting section 21 may be the same as the central angle of the transition section 22, and both the arcuate abutting section 21 and the transition section 22 may be plate-shaped for ease of preparation.

[0047] In some or certain embodiments, the telescopic members 3 are located between two adjacent arc-shaped abutting sections 21 , the telescopic directions of the telescopic members 3 are located in the same plane, and the telescopic directions are parallel to the end face of the annular tank plate 101 .

[0048] This is beneficial to reducing the installation space required for the support ring 2, and when the telescopic member 3 is extended or retracted, the force acting on the arc-shaped abutment section 21 is also beneficial to making the arc-shaped abutment section 21 contact more closely with the annular tank wall. When the telescopic member 3 is extended or retracted, the overall center of gravity of the support ring 2 can also be ensured to be stable.

[0049] In some or certain embodiments, there may be an angle between the telescopic direction of the telescopic member 3 and the end surface of the annular tank wall, and the telescopic directions of two adjacent telescopic members 3 may be symmetrically arranged, thereby achieving stable lifting and support of the support ring 2.

[0050] In some or certain embodiments, the telescopic member 3 may be a hydraulic jack, or a telescopic rod or a telescopic cylinder, etc., which can be telescopic to push the arc-shaped abutting portion to move and support the ring-shaped tank plate 101.

[0051] In some or certain embodiments, there is a millimeter-level spacing between the transition section 22 and the two corresponding bolted arcuate abutting sections 21. The millimeter-level spacing between the transition section 22 and the two corresponding bolted arcuate abutting sections 21 facilitates adjustment of the positions of the transition section 22 and the arcuate abutting sections 21, and simultaneously, in conjunction with the telescopic member 3, enables close contact between the support ring 2 and the annular tank plate 101.

[0052] It should be noted that the millimeter-level spacing involved in this application is a spacing of 0 mm to 10 mm.

[0053] In some or certain embodiments, the bolts 23 connecting the transition section 22 and the arcuate abutting section 21 may extend radially along the annular tank wall and connect the transition section 22 and the arcuate abutting section 21, which facilitates installation and helps provide a certain adjustment space.

[0054] In some or certain embodiments, the arcuate abutment section 21 and the transition section 22 are both plate-shaped, the cross-section of the arcuate abutment section 21 is U-shaped, and the support ring 2 is also provided with a reinforcing rib plate 24 fixedly connected to the arcuate abutment section 21 and used for spot welding connection with the annular tank plate 101.

[0055] The plate-shaped arcuate abutment section 21 and transition section 22 are easy to prepare, which is beneficial to reducing the cost of use. The cross-section of the arcuate abutment section 21 is U-shaped, and the support ring 2 is also provided with a reinforcing rib plate 24 fixedly connected to the arcuate abutment section 21 and used for spot welding to the annular tank plate 101, which can improve the use strength of the support ring 2. The reinforcing rib plate 24 is also spot welded to the annular tank wall, which can improve the stability of the annular tank plate 101 during the lifting process and is beneficial to the welding of the annular tank plate 101.

[0056] It should be noted that the connection between the reinforcing rib plate 24 and the annular tank plate 101 is not shown in the figure.

[0057] In some or certain embodiments, the arcuate abutting section 21 can be formed by rounding a channel steel, and the transition section 22 can be configured as an arcuate plate or a straight plate. Both sides or both ends of the transition section 22 can be bolted to the inner circumferential walls of two adjacent arcuate abutting sections 21 by bolts 23. This facilitates preparation, and the space between two adjacent arcuate abutting sections 21 can also be used to install the telescopic member 3.

[0058] In some or certain embodiments, the lifting portion 11 is provided with a limiting groove 111 extending through the lifting portion 11 in a circumferential direction. The limiting groove 111 is used for the support ring 2 to pass through and is provided with an opening facing the annular tank plate 101 .

[0059] The lifting portion 11 is provided with a limiting groove 111, which can facilitate the support ring 2 to pass through the support and also play a certain role in limiting the support ring 2. The support ring 2 in the limiting groove 111 can also contact the annular tank plate 101 at the opening position of the limiting groove 111, thereby achieving abutment support for the annular tank plate 101. This is conducive to improving the stability of the annular tank plate 101 during the lifting process.

[0060] In some or certain embodiments, the lifting assembly 1 comprises:

[0061] Support member 12.

[0062] The lifting mechanism 13 includes a connection end 131 connected to the support member 12 and a lifting hook 132 that can be raised and lowered relative to the connection end 131 . The lifting hook 132 is connected to the lifting portion 11 .

[0063] The support member 12 provides support for the lifting mechanism 13. The connecting section of the lifting mechanism 13 is connected to the support member 12. The lifting hook 132 in the lifting mechanism 13 can be raised and lowered relative to the connecting end 131. The lifting hook 132 is hooked with the lifting part 11, which can realize the lifting of the annular tank plate 101 while facilitating the adjustment of the position of the lifting part 11 and the lifting hook 132, thereby facilitating the connection and fixation of the lifting part 11 and the annular tank plate 101.

[0064] In some or certain embodiments, the lifting portion 11 may be in the form of a plate or block with a limiting slot 111, or in the form of a lifting lug, and may be provided with a lifting hole that cooperates with the lifting hook 132, so as to facilitate adjustment of the position of the lifting portion 11 and the connection between the lifting portion 11 and the annular tank plate 101.

[0065] In some or certain embodiments, the lifting mechanism 13 is a chain hoist. This facilitates lifting and lowering, and the chain hoist is typically provided with a lifting hook 132. There is typically a certain amount of adjustment space between the lifting hook 132 and the base or housing of the chain hoist. In conjunction with the support ring 2 having an adjustable outer diameter, the lifting mechanism 13 can stably lift an annular tank plate 101 within a certain outer diameter range without requiring significant position adjustment, thereby improving the overall versatility of the tank preparation auxiliary device.

[0066] In some or certain embodiments, the lifting mechanism 13 can be a chain hoist, such as a chain hoist or a winch. This provides a simple structure and ease of movement. The two hooks of the chain hoist can be configured as a connecting end 131 and a lifting hook 132, respectively. The connecting end 131 can also be connected to the support member 12 by a hook-and-loop mechanism, facilitating assembly and disassembly of the entire structure.

[0067] In some or certain embodiments, the support member 12 includes:

[0068] Bottom support 121.

[0069] The columnar portion 122 and the top portion 123 , both ends of the columnar portion 122 are connected to the bottom support 121 and the top portion 123 respectively, the top portion 123 is wider than the columnar portion 122 , and the top portion 123 is connected to the connecting end 131 .

[0070] The support rod 124 has an included angle between its axis and the columnar portion 122 , one end of the support rod 124 is connected to the top 123 , and the other end is used to support the tank bottom 102 of the storage tank 10 .

[0071] The support member 12 adopts the above structure, which is easy to prepare and takes up little space, and can also improve the overall stability. The bottom support 121 and the support rod 124 can be spot-welded and fixed to the tank bottom 102 of the storage tank 10 to enhance the supporting effect.

[0072] It should be noted that when welding, the storage tank 10 generally includes a tank top 103 and a tank bottom 102 that are opposite to each other. The tank top 103 and the tank bottom 102 are connected by the tank wall. The support member 12 can be supported on the tank bottom 102. The lifting assembly 1 lifts the annular tank plate 101 to a certain height and then welds it to the tank top 103. Multiple annular tank plates 101 can be lifted in sequence and coaxially welded to form the tank wall. For relatively small storage tanks 10, the overall space occupied is small.

[0073] In some or certain embodiments, the support member 12 may also be configured as a bracket or other structure as needed, which is not limited in this application.

[0074] In some or certain embodiments, the tank preparation auxiliary device further comprises:

[0075] A plurality of auxiliary clamping plates (not shown) are used to be spot-welded to the annular tank plate 101 at intervals along the circumference of the annular tank plate 101, and two auxiliary clamping plates are used to clamp an arcuate abutment section 21. The auxiliary clamping plates can be spot-welded to the annular tank plate 101 after the support ring 2 abuts the annular tank plate 101. The two auxiliary clamping plates can be used to clamp an arcuate abutment section 21. After the arcuate abutment section 21 and the annular tank plate 101 are in close contact, the arcuate abutment section 21 and the annular tank plate 101 can be effectively positioned, effectively ensuring the coaxiality and contact tightness between the support ring 2 and the annular tank plate 101.

[0076] It should be noted that the parallelism involved in this application is relative to the absolute parallelism in geometry, and a deviation of 0 to 3° is allowed.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0078] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0079] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A tank preparation auxiliary device, characterized in that: The ring plate used to support and lift the storage tank includes: A plurality of lifting assemblies are distributed at intervals along the circumference of the annular tank plate, and the lifting assemblies are provided with lifting parts that can be raised and lowered and are used to connect with the annular tank plate; a support ring, supported by the plurality of lifting portions and coaxially abutting against the inner circumferential wall of the annular tank plate, the support ring comprising a plurality of arcuate abutting sections and transition sections bolted alternately along the circumferential direction; A plurality of telescopic members are sequentially connected to each two adjacent arc-shaped abutting sections along the circumferential direction, and each of the telescopic members is provided with two ends respectively connected to the two adjacent arc-shaped abutting sections.

2. The tank preparation auxiliary device according to claim 1, characterized in that: The central angle corresponding to the arc-shaped abutting section is greater than the central angle corresponding to the transition section.

3. The tank preparation auxiliary device according to claim 1, characterized in that: The telescopic members are all located between two adjacent arc-shaped abutting sections, the telescopic directions of the telescopic members are all located in the same plane, and the telescopic directions are all parallel to the end surface of the annular tank plate.

4. The tank preparation auxiliary device according to any one of claims 1 to 3, characterized in that: There is a millimeter-level distance between the transition section and the two correspondingly bolted arc-shaped abutting sections.

5. The tank preparation auxiliary device according to any one of claims 1 to 3, characterized in that: The arcuate abutment section and the transition section are both plate-shaped, and the cross section of the arcuate abutment section is U-shaped. The support ring is also provided with a reinforcing rib plate fixedly connected to the arcuate abutment section and used for spot welding connection with the annular tank plate.

6. The tank preparation auxiliary device according to any one of claims 1 to 3, characterized in that: The lifting portion is provided with a limiting groove extending through the lifting portion along the circumferential direction. The limiting groove is used for the support ring to pass through and is provided with an opening facing the annular tank plate.

7. The tank preparation auxiliary device according to any one of claims 1 to 3, characterized in that: The lifting assembly comprises: Support members; The lifting mechanism is provided with a connection end connected to the support member and a lifting hook which can be raised and lowered relative to the connection end, and the lifting hook is hooked with the lifting part.

8. The tank preparation auxiliary device according to claim 7, characterized in that: The lifting mechanism is a chain hoist.

9. The tank preparation auxiliary device according to claim 7, characterized in that: The support member comprises: Bottom support; A columnar portion and a top portion, wherein two ends of the columnar portion are respectively connected to the bottom support and the top portion, the top portion is wider than the columnar portion, and the top portion is connected to the connecting end; The support rod has an included angle between its axis and the columnar portion, one end of the support rod is connected to the top, and the other end is used to support the bottom of the tank.

10. The tank preparation auxiliary device according to any one of claims 1 to 3, characterized in that: The storage tank preparation auxiliary device also includes: A plurality of auxiliary clamping plates are used for spot welding to the annular tank plate at intervals along the circumference of the annular tank plate, and two of the auxiliary clamping plates are used for clamping one of the arc-shaped abutting sections.

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