A weld-free tubular steel structure splicing structure and splicing method

Abstract

This invention provides a weld-free tubular steel structure splicing structure and splicing method. The splicing structure includes: a core cylinder, a grout capsule, and an outer fixing cylinder. The outer wall of the core cylinder has a first groove, and the outer wall of the outer fixing cylinder has a second groove. The core cylinder is used to connect with the protrusions on the inner sidewalls of the first and second pipe fittings to be connected via the first groove. The outer fixing cylinder is used to connect with the protrusions on the outer sidewalls of the first and second pipe fittings to be connected via the second groove. The outer sidewall of the outer fixing cylinder has multiple grout holes, and the grout capsule is arranged in the grout holes to release grout or metal adhesive under the pressure of the pressure bolts and squeeze it into the joint between the outer fixing cylinder and the first and second pipe fittings. This invention uses a mortise and tenon structure to form a mechanical connection between the outer fixing cylinder, the core cylinder, and the steel structure to be connected, eliminating the welding process, simplifying the procedure, reducing the difficulty of implementation, and greatly reducing the construction time.

Description

Technical Field

[0001] This invention relates to the field of steel structure splicing technology, and in particular to a weld-free tubular steel structure splicing structure and splicing method. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Currently, the main types of traditional steel structure splicing nodes are: traditional welding type, bolt and flange connection, and bolt and welding combination type.

[0004] The inventors discovered that the current traditional steel structure splicing node structure has the following drawbacks:

[0005] (1) In traditional welding, the steel consumption is high, stiffening ribs of various sizes are required, the welding process is complex, the implementation is difficult, the requirements for the assembly site are high, the construction time is long, and it cannot be reused.

[0006] (2) In the bolt and flange splicing method, the tensile force, bending moment and shear force at the splice are mainly borne by the bolt. High-strength bolts are generally used, requiring a large number of bolts, resulting in a large node size, inconsistent appearance, high cost, and limited application. It has certain limitations for splicing of excessively large size, large load or excessively small size.

[0007] (3) Although the bolt welding combination method can reduce the number of bolts used, it still has the problems of high steel consumption, complex welding process, high implementation difficulty and inability to be reused as in the traditional welding method. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a weld-free tubular steel structure splicing structure and splicing method. It uses an outer fixed cylinder, a core cylinder, and the steel structure to be connected to form a mortise and tenon structure for mechanical connection, eliminating the welding process. The procedure is simple, the implementation is easy, and the construction time is greatly reduced.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] In a first aspect, the present invention provides a weld-free tubular steel structure splicing structure.

[0011] A weld-free tubular steel structure splicing structure includes: a core tube, a catalytic cartridge, and an outer fixing tube;

[0012] The outer wall of the core cylinder has a first slot, and the outer wall of the outer fixing cylinder has a second slot. The core cylinder is used to connect with the protrusions on the inner side walls of the first and second pipe fittings to be connected through the first slot, and the outer fixing cylinder is used to connect with the protrusions on the outer side walls of the first and second pipe fittings to be connected through the second slot.

[0013] Multiple grouting holes are opened on the outer side wall of the outer fixed cylinder, and grouting bags are arranged in the grouting holes to release grout or metal glue into the joint between the outer fixed cylinder and the first and second pipe fittings under the pressure of the pressure bolts.

[0014] As a further limitation of the first aspect of the present invention, the first end of the first pipe and the first end of the second pipe are spliced ​​and in contact, the splice seam of the first pipe and the second pipe is located in the middle of the core cylinder, and the splice seam of the first pipe and the second pipe is located in the middle of the outer fixed cylinder.

[0015] As a further limitation of the first aspect of the present invention, the first pipe and the second pipe are both round pipes or both are square pipes, or the pipe section structure where the first pipe and the second pipe are joined is the same, the shape of the core cylinder matches the inner cavity structure of the first pipe and the second pipe, and the shape of the outer fixed cylinder matches the outer wall structure of the first pipe and the second pipe.

[0016] As a further definition of the first aspect of the present invention, along the central axis of the outer fixed cylinder, multiple rows of medicine holes are arranged on the outer side wall of the outer fixed cylinder, each row including multiple medicine holes arranged at intervals, a portion of the medicine holes in each row are opposite to the first pipe fitting, and the remaining portion of the medicine holes are opposite to the second pipe fitting.

[0017] As a further limitation of the first aspect of the present invention, the outer wall of the outer fixed cylinder is provided with at least two first ring plates coaxial with the outer fixed cylinder, the first pipe is provided with at least one second ring plate coaxial with the first pipe, and the second pipe is provided with at least one third ring plate coaxial with the second pipe.

[0018] The first ring plate has multiple first through holes, the second ring plate has multiple second through holes, and the third ring plate has multiple third through holes;

[0019] The tension rod passes through the first through hole, the second through hole, and the third through hole on the same axis, and both ends of the tension rod are fixed by fixing elements.

[0020] As a further limitation of the first aspect of the present invention, a first ring plate is provided at each end of the outer fixed cylinder, the first ring plate at the first end of the outer fixed cylinder is in contact with the second ring plate on the first pipe fitting, and the first ring plate at the first end of the outer fixed cylinder is in contact with the third ring plate on the second pipe fitting.

[0021] As a further limitation of the first aspect of the present invention, at least one first tensile hole is opened on the side wall of the first pipe fitting, at least one second tensile hole is opened on the side wall of the second pipe fitting, a first tensile threaded hole that mates with the first tensile hole is opened on the side wall of the outer fixed cylinder, and a second tensile threaded hole that mates with the second tensile hole is opened on the side wall of the outer fixed cylinder.

[0022] The first threaded tensile rod connects the first pipe fitting to the outer fixed cylinder through the first tensile threaded hole and the first tensile hole, and the second threaded tensile rod connects the second pipe fitting to the outer fixed cylinder through the second tensile threaded hole and the second tensile hole.

[0023] As a further limitation of the first aspect of the present invention, along the central axis of the outer fixed cylinder, multiple rows of ore holes are arranged on the outer side wall of the outer fixed cylinder, each row including multiple ore holes arranged at intervals, the first tensile threaded hole is located between adjacent ore holes in each row, and the second tensile threaded hole is located between adjacent ore holes in each row.

[0024] Secondly, the present invention provides an assembly method for a weld-free tubular steel structure splicing structure, comprising the following processes:

[0025] The core tube is placed inside the first and second pipe fittings through the first slot, with the ends of the first and second pipe fittings in close contact, and the joint between the first and second pipe fittings located in the middle of the core tube.

[0026] The outer fixing cylinder is fitted onto the outside of the first and second pipe fittings through the second slot, and the joint between the first and second pipe fittings is located in the middle of the outer fixing cylinder.

[0027] Tensile bars are evenly arranged on the outer periphery of the outer fixed cylinder and fixed with fixing elements. The drug capsule is placed in the drug hole of the outer fixed cylinder, and pressure bolts are installed to squeeze the drug capsule, squeezing the grout or metal glue in the drug capsule into the joint between the outer fixed cylinder and the first and second pipe fittings.

[0028] Thirdly, the present invention provides an assembly method for a weld-free tubular steel structure splicing structure.

[0029] An assembly method for a weld-free tubular steel structure splicing structure includes the following steps:

[0030] The core tube is placed inside the first and second pipe fittings through the first slot, with the ends of the first and second pipe fittings in close contact, and the joint between the first and second pipe fittings located in the middle of the core tube.

[0031] The outer fixing cylinder is fitted onto the outside of the first and second pipe fittings through the second slot, and the joint between the first and second pipe fittings is located in the middle of the outer fixing cylinder.

[0032] The first threaded tensile rod connects the first pipe fitting to the outer fixed cylinder through the first tensile threaded hole and the first tensile hole; the second threaded tensile rod connects the second pipe fitting to the outer fixed cylinder through the second tensile threaded hole and the second tensile hole.

[0033] The first and second threaded tensile rods are evenly arranged on the outer periphery of the outer fixed cylinder. The medicated bag is placed in the medicated hole of the outer fixed cylinder. The pressure bolt is installed to squeeze the medicated bag, squeezing the grout or metal glue inside the medicated bag into the joint between the outer fixed cylinder and the first and second pipe fittings.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] 1. This invention innovatively proposes a weld-free tubular steel structure splicing structure, which uses an outer fixed cylinder, a core cylinder, and the steel structure to be connected to form a mortise and tenon structure for mechanical connection. Through the synergistic effect of the outer fixed cylinder, the core cylinder, and the steel structure to be connected, the bending moment and shear force at the splice are jointly borne by the outer fixed cylinder and the core cylinder, resisting the tensile force at the splice, reducing or eliminating the amount of bolts, eliminating the welding process, simplifying the process, reducing the difficulty of implementation, and greatly reducing the construction time.

[0036] 2. This invention innovatively proposes a weld-free tubular steel structure splicing structure, introducing pressure bolts. By squeezing the medicated bladder, the high-strength grout or metal adhesive inside the medicated bladder is squeezed into the joint between the outer fixed cylinder and the first and second pipe fittings, so that the components can work together better and effectively ensure the structural strength.

[0037] 3. This invention innovatively proposes a weld-free tubular steel structure splicing structure, which adopts a completely mechanical connection, allowing for easy disassembly and reuse. It has no special requirements for the assembly site and has a wide range of applications, including steel column splicing, truss splicing, and pipe splicing. It can also be used for offshore splicing operations where hot work is not possible or difficult, or for the assembly of offshore platform structural modules. It can be standardized in design and manufacturing according to commonly used closed section types on the market and can be widely used.

[0038] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0039] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0040] Figure 1 This is a schematic diagram of the weld-free tubular steel structure splicing structure provided in Embodiment 1 of the present invention;

[0041] Figure 2 This is a schematic diagram of the outer fixed cylinder provided in Embodiment 1 of the present invention;

[0042] Figure 3 This is a schematic diagram of the splicing of the first and second pipe fittings provided in Embodiment 1 of the present invention;

[0043] Figure 4 This is a schematic diagram of the weld-free tubular steel structure splicing structure provided in Embodiment 2 of the present invention;

[0044] Figure 5 This is a schematic diagram of the core cylinder structure provided in Embodiment 1 or Embodiment 2 of the present invention;

[0045] Figure 6 This is a schematic diagram of the drug capsule structure provided in Embodiment 1 or Embodiment 2 of the present invention;

[0046] Figure 7 This is a schematic diagram of the pressure bolt structure provided in Embodiment 1 or Embodiment 2 of the present invention;

[0047] Among them, 1. First pipe fitting; 2. Second pipe fitting; 3. Outer fixing cylinder; 4. Tension rod; 5. Drug hole; 6-1. First tension threaded hole; 6-2. Second tension threaded hole; 7. First ring plate; 8. Second ring plate; 9. Third ring plate; 10. Core cylinder; 11. First slot; 12. Drug bladder; 13. Pressure bolt; 14. Protrusion. Detailed Implementation

[0048] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0049] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0050] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0051] Example 1:

[0052] like Figure 1 As shown, Embodiment 1 of the present invention provides a weld-free tubular steel structure splicing structure, including: a core cylinder 10 (as shown in the figure). Figure 5 As shown), drug capsule 12 (as shown) Figure 6 (as shown) and outer fixed cylinder 3 (as shown) Figure 2 (as shown);

[0053] The outer wall of the core cylinder 10 has a first slot 11 and the outer wall of the outer fixing cylinder 3 has a second slot. The core cylinder 10 is used to connect with the protrusion on the inner side wall of the first pipe fitting 1 and the second pipe fitting 2 to be connected through the first slot 11. The outer fixing cylinder 3 is used to connect with the protrusion 14 on the outer side wall of the first pipe fitting 1 and the second pipe fitting 2 to be connected through the second slot.

[0054] Multiple tamper holes 5 are opened on the outer wall of the outer fixed cylinder 3, and the tamper bladder 12 is arranged in the tamper holes 5 for use with the pressure bolt 13 (such as...). Figure 7 Under the pressure of the material (as shown), high-strength grout or metal adhesive is released and squeezed into the joint between the outer fixed cylinder 3 and the first pipe 1 and the second pipe 2.

[0055] In this embodiment, the preferred first pipe fitting 1 and the second pipe fitting 2 are both round pipes. It is understood that in some other implementations, the first pipe fitting 1 and the second pipe fitting 2 can also be square pipes or other types of regular pipe fittings, or the pipe segment structure at the docking position of the first pipe fitting 1 and the second pipe fitting 2 is the same (in this case, the overall structure of the pipe fittings can be different, but the pipe segment at the docking position must be the same). The shape of the core cylinder 10 matches the inner cavity structure of the first pipe fitting 1 and the second pipe fitting 2, and the shape of the outer fixed cylinder 3 matches the outer wall structure of the first pipe fitting 1 and the second pipe fitting 2.

[0056] In this embodiment, the first end of the first pipe fitting 1 and the first end of the second pipe fitting 2 are spliced ​​and contacted (i.e., the contacting pipe sections must be coaxial), such as Figure 3 As shown, the joint between the first pipe fitting 1 and the second pipe fitting 2 is located in the middle of the core cylinder 10, and the joint between the first pipe fitting 1 and the second pipe fitting 2 is located in the middle of the outer fixed cylinder 3.

[0057] In this embodiment, along the central axis of the outer fixed cylinder 3, multiple rows of medicine holes 5 are arranged on the outer side wall of the outer fixed cylinder 3. Each row includes multiple medicine holes 5 arranged at intervals. A portion of the medicine holes 5 in each row are opposite to the first pipe fitting 1, and the remaining portion of the medicine holes 5 are opposite to the second pipe fitting 2.

[0058] In this embodiment, preferably, the outer wall of the outer fixed cylinder 3 is provided with at least two first ring plates 7 coaxial with the outer fixed cylinder 3, the first pipe 1 is provided with at least one second ring plate 8 coaxial with the first pipe 1, and the second pipe 2 is provided with at least one third ring plate 9 coaxial with the second pipe 2.

[0059] The first ring plate 7 has multiple first through holes, the second ring plate 8 has multiple second through holes, and the third ring plate 9 has multiple third through holes.

[0060] The tension rod 4 passes through the first through hole, the second through hole and the third through hole on the same axis, and both ends of the tension rod 4 are fixed by fixing elements.

[0061] In this embodiment, preferably, a first ring plate 7 is provided at each end of the outer fixed cylinder 3. The first ring plate 7 at the first end of the outer fixed cylinder 3 is in contact with the second ring plate 8 on the first pipe fitting 1, and the first ring plate 7 at the first end of the outer fixed cylinder 3 is in contact with the third ring plate 9 on the second pipe fitting 2.

[0062] Specific assembly methods include:

[0063] The core tube 10 is placed inside the first tube 1 and the second tube 2 through the first slot 11. The ends of the first tube 1 and the second tube 2 are in close contact, and the splice seam of the first tube 1 and the second tube 2 is located in the middle of the core tube 10.

[0064] The outer fixing cylinder 3 is fitted onto the outside of the first pipe fitting 1 and the second pipe fitting 2 through the second slot, and the splice of the first pipe fitting 1 and the second pipe fitting 2 is located in the middle of the outer fixing cylinder 3.

[0065] Tension rods 4 are evenly arranged on the outer periphery of the outer fixed cylinder 3 and fixed with fixing elements (such as bolts). Drug sac 12 is placed in the drug hole 5 of the outer fixed cylinder 3. Pressure bolts are installed to squeeze the drug sac 12 and squeeze the grout or metal glue in the drug sac 12 into the joint between the outer fixed cylinder 3 and the first pipe fitting 1 and the second pipe fitting 2.

[0066] Example 2:

[0067] like Figure 4 As shown, Embodiment 2 of the present invention provides a weld-free tubular steel structure splicing structure, including: a core cylinder 10 (as shown in the figure). Figure 5 As shown), drug capsule 12 (as shown) Figure 6 (as shown) and outer fixed cylinder 3 (as shown) Figure 2 (as shown);

[0068] The outer wall of the core cylinder 10 has a first slot 11 and the outer wall of the outer fixing cylinder 3 has a second slot. The core cylinder 10 is used to connect with the protrusion on the inner side wall of the first pipe fitting 1 and the second pipe fitting 2 to be connected through the first slot 11. The outer fixing cylinder 3 is used to connect with the protrusion 14 on the outer side wall of the first pipe fitting 1 and the second pipe fitting 2 to be connected through the second slot.

[0069] Multiple tamper holes 5 are opened on the outer wall of the outer fixed cylinder 3, and the tamper bladder 12 is arranged in the tamper holes 5 for use with the pressure bolt 13 (such as...). Figure 7 Under the pressure of the material (as shown), high-strength grout or metal adhesive is released and squeezed into the joint between the outer fixed cylinder 3 and the first pipe 1 and the second pipe 2.

[0070] In this embodiment, the preferred first pipe fitting 1 and the second pipe fitting 2 are both round pipes. It is understood that in some other implementations, the first pipe fitting 1 and the second pipe fitting 2 can also be square pipes or other types of regular pipe fittings, or the pipe segment structure at the docking position of the first pipe fitting 1 and the second pipe fitting 2 is the same (in this case, the overall structure of the pipe fittings can be different, but the pipe segment at the docking position must be the same). The shape of the core cylinder 10 matches the inner cavity structure of the first pipe fitting 1 and the second pipe fitting 2, and the shape of the outer fixed cylinder 3 matches the outer wall structure of the first pipe fitting 1 and the second pipe fitting 2.

[0071] In this embodiment, the first end of the first pipe fitting 1 and the first end of the second pipe fitting 2 are spliced ​​and contacted (i.e., the contacting pipe sections must be coaxial), such as Figure 3 As shown, the joint between the first pipe fitting 1 and the second pipe fitting 2 is located in the middle of the core cylinder 10, and the joint between the first pipe fitting 1 and the second pipe fitting 2 is located in the middle of the outer fixed cylinder 3.

[0072] In this embodiment, at least one first tensile hole is opened on the side wall of the first pipe fitting 1, at least one second tensile hole is opened on the side wall of the second pipe fitting 2, a first tensile threaded hole 6-1 that mates with the first tensile hole is opened on the side wall of the outer fixed cylinder 3, and a second tensile threaded hole 6-2 that mates with the second tensile hole is opened on the side wall of the outer fixed cylinder 3.

[0073] The first threaded tensile rod 4 connects the first pipe fitting 1 to the outer fixed cylinder 3 through the first tensile threaded hole 6-1 and the first tensile hole, and the second threaded tensile rod 4 connects the second pipe fitting 2 to the outer fixed cylinder 3 through the second tensile threaded hole 6-2 and the second tensile hole.

[0074] In this embodiment, along the central axis of the outer fixed cylinder 3, multiple rows of drug holes 5 are arranged on the outer side wall of the outer fixed cylinder 3. Each row includes multiple drug holes 5 arranged at intervals. The first tensile threaded hole 6-1 is located between adjacent drug holes 5 in each row, and the second tensile threaded hole 6-2 is located between adjacent drug holes 5 in each row.

[0075] Specific installation methods include:

[0076] The core tube 10 is placed inside the first tube 1 and the second tube 2 through the first slot 11. The ends of the first tube 1 and the second tube 2 are in close contact, and the splice seam of the first tube 1 and the second tube 2 is located in the middle of the core tube 10.

[0077] The outer fixing cylinder 3 is fitted onto the outside of the first pipe fitting 1 and the second pipe fitting 2 through the second slot, and the splice of the first pipe fitting 1 and the second pipe fitting 2 is located in the middle of the outer fixing cylinder 3.

[0078] The first threaded tensile rod connects the first pipe fitting 1 to the outer fixed cylinder 3 through the first tensile threaded hole 6-1 and the first tensile hole; the second threaded tensile rod connects the second pipe fitting 2 to the outer fixed cylinder 3 through the second tensile threaded hole 6-2 and the second tensile hole.

[0079] The first threaded tensile rod and the second threaded tensile rod are evenly arranged on the outer periphery of the outer fixed cylinder 3. The medicine bag 12 is placed in the medicine hole 5 of the outer fixed cylinder 3. The pressure bolt 13 is installed to squeeze the medicine bag, and the grout or metal glue in the medicine bag 12 is squeezed into the joint between the outer fixed cylinder 3 and the first pipe fitting 1 and the second pipe fitting 2.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A weld-free tubular steel structure splicing structure, characterized in that, include: Core tube, drug capsule, and outer fixing tube; The outer wall of the core cylinder has a first slot, and the outer wall of the outer fixing cylinder has a second slot. The core cylinder is used to connect with the protrusions on the inner side walls of the first and second pipe fittings to be connected through the first slot, and the outer fixing cylinder is used to connect with the protrusions on the outer side walls of the first and second pipe fittings to be connected through the second slot. The first end of the first pipe fitting and the first end of the second pipe fitting are spliced ​​together and contact each other. The splice joint of the first pipe fitting and the second pipe fitting is located in the middle of the core cylinder. The splice joint of the first pipe fitting and the second pipe fitting is located in the middle of the outer fixed cylinder. Multiple grouting holes are opened on the outer side wall of the outer fixed cylinder, and grouting bags are arranged in the grouting holes to release grouting material or metal glue into the joint between the outer fixed cylinder and the first and second pipe fittings under the pressure of the pressure bolts. Along the central axis of the outer fixed cylinder, multiple rows of chemical holes are arranged on the outer side wall of the outer fixed cylinder. Each row includes multiple chemical holes arranged at intervals. A portion of the chemical holes in each row are opposite to the first pipe fitting, and the remaining chemical holes are opposite to the second pipe fitting. The outer fixed cylinder is provided with a first ring plate at each end. The first ring plate at the first end of the outer fixed cylinder is in contact with the second ring plate on the first pipe fitting, and the first ring plate at the first end of the outer fixed cylinder is in contact with the third ring plate on the second pipe fitting. The first pipe fitting has at least one first tensile hole on its side wall, the second pipe fitting has at least one second tensile hole on its side wall, the outer fixed cylinder has a first tensile threaded hole that mates with the first tensile hole on its side wall, and the outer fixed cylinder has a second tensile threaded hole that mates with the second tensile hole on its side wall. The first threaded tensile rod connects the first pipe fitting to the outer fixed cylinder through the first tensile threaded hole and the first tensile hole, and the second threaded tensile rod connects the second pipe fitting to the outer fixed cylinder through the second tensile threaded hole and the second tensile hole.

2. The weld-free tubular steel structure splicing structure as described in claim 1, characterized in that, The first and second fittings are both round pipes or both are square pipes, or the pipe sections where the first and second fittings meet have the same structure, the shape of the core cylinder matches the inner cavity structure of the first and second fittings, and the shape of the outer fixed cylinder matches the outer wall structure of the first and second fittings.

3. The weld-free tubular steel structure splicing structure as described in any one of claims 1-2, characterized in that, The outer wall of the outer fixed cylinder is provided with at least two first ring plates coaxial with the outer fixed cylinder, the first pipe fitting is provided with at least one second ring plate coaxial with the first pipe fitting, and the second pipe fitting is provided with at least one third ring plate coaxial with the second pipe fitting. The first ring plate has multiple first through holes, the second ring plate has multiple second through holes, and the third ring plate has multiple third through holes; The tension rod passes through the first through hole, the second through hole, and the third through hole on the same axis, and both ends of the tension rod are fixed by fixing elements.

4. The weld-free tubular steel structure splicing structure as described in claim 1, characterized in that, Along the central axis of the outer fixed cylinder, multiple rows of explosive holes are arranged on the outer side wall of the outer fixed cylinder. Each row includes multiple explosive holes arranged at intervals. The first tensile threaded hole is located between adjacent explosive holes in each row, and the second tensile threaded hole is located between adjacent explosive holes in each row.

5. An assembly method for a weld-free tubular steel structure splicing structure as described in claim 1 or 3, characterized in that, The core tube is placed inside the first and second pipe fittings through the first slot, with the ends of the first and second pipe fittings in close contact, and the joint between the first and second pipe fittings located in the middle of the core tube. The outer fixing cylinder is fitted onto the outside of the first and second pipe fittings through the second slot, and the joint between the first and second pipe fittings is located in the middle of the outer fixing cylinder. Tensile bars are evenly arranged on the outer periphery of the outer fixed cylinder and fixed with fixing elements. The drug capsule is placed in the drug hole of the outer fixed cylinder, and pressure bolts are installed to squeeze the drug capsule, squeezing the grout or metal glue in the drug capsule into the joint between the outer fixed cylinder and the first and second pipe fittings.

6. A method for assembling a weld-free tubular steel structure splicing structure as described in claim 1 or 4, characterized in that, The core tube is placed inside the first and second pipe fittings through the first slot, with the ends of the first and second pipe fittings in close contact, and the joint between the first and second pipe fittings located in the middle of the core tube. The outer fixing cylinder is fitted onto the outside of the first and second pipe fittings through the second slot, and the joint between the first and second pipe fittings is located in the middle of the outer fixing cylinder. The first threaded tensile rod connects the first pipe fitting to the outer fixed cylinder through the first tensile threaded hole and the first tensile hole; the second threaded tensile rod connects the second pipe fitting to the outer fixed cylinder through the second tensile threaded hole and the second tensile hole. The first and second threaded tensile rods are evenly arranged on the outer periphery of the outer fixed cylinder. The medicated bag is placed in the medicated hole of the outer fixed cylinder. The pressure bolt is installed to squeeze the medicated bag, squeezing the grout or metal glue inside the medicated bag into the joint between the outer fixed cylinder and the first and second pipe fittings.

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