Connection structure between segmented tubular components

Abstract

The present invention provides a connection structure between segmented tubular components, including an upper connecting pipe section, a lower connecting pipe section sleeved on the upper connecting pipe section, and a connecting piece, wherein the upper end of the lower connecting pipe section is provided with a protrusion, the upper connecting pipe section is provided with a limiting portion in contact with the upper end face of the protrusion, the upper connecting pipe section is provided with a connecting hole, and the connecting piece includes a limiting rod portion passing through the connecting hole, and one end of the limiting rod portion passes through the connecting hole and contacts with the lower end face of the protrusion. When making a connection, the upper connecting pipe section is sleeved on the lower connecting pipe section, and the limiting portion on the upper connecting pipe section contacts with the upper end face of the protrusion on the lower connecting pipe section, and then the limiting rod portion of the connecting piece is inserted into the connecting hole of the upper connecting pipe section until one end of the limiting rod portion passes through the connecting hole and contacts with the lower end face of the protrusion on the lower connecting pipe section. This connection structure has greater connection strength, better fatigue resistance, and higher reliability.

Description

Technical Field

[0001] The invention relates to a connection structure, in particular to a connection structure between segmented tubular components. Background Art

[0002] The tubular components have a simple and beautiful structural form, and their structural response performs well under complex external wind loads and flow loads. Therefore, tubular components are widely used in engineering practice, such as various large-scale pipelines in petrochemical facilities, pile foundations of fixed offshore platforms, onshore and offshore wind turbine towers, etc.

[0003] At present, most engineering application scenarios of tubular structures require that the tubular structure extend a long length in the axial direction to connect the engineering facilities at both ends. However, due to the limitations of factory production capacity and road transportation conditions, large-scale tubular structures are generally manufactured in sections, transported to the project site, and then assembled and spliced ​​in sections. Therefore, a quick and easy segmented connection method and a safe and reliable connection structure are the basic requirements for the engineering application of large-scale tubular structures. At present, the segmented connection of tubular structures is generally connected by flanges and bolts. The axial force between the two sections of the tubular structure will directly act on the bolts and their threads. Long-term use can easily cause the bolts to be damaged, which also leads to poor reliability of this connection structure. In addition, this connection method has problems such as difficulty in construction, lack of stability, and high maintenance costs in the later stage, especially when the external environmental load is complex and changeable. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a connection structure between segmented tubular components with higher reliability.

[0005] To achieve the above-mentioned purpose, the present invention provides a connection structure between segmented tubular components, including an upper connecting pipe segment, a lower connecting pipe segment sleeved on the upper connecting pipe segment and a connecting piece, wherein the upper end of the lower connecting pipe segment is provided with a protrusion, the upper connecting pipe segment is provided with a limiting portion in contact with the upper end surface of the protrusion, the upper connecting pipe segment is provided with a connecting hole, and the connecting piece includes a limiting rod portion passing through the connecting hole, and one end of the limiting rod portion passes through the connecting hole and contacts with the lower end surface of the protrusion.

[0006] Furthermore, a limiting inclined surface is provided at one end of the limiting rod portion, and the limiting inclined surface contacts the lower end surface of the protrusion.

[0007] Furthermore, a limited inclined surface is provided on the lower end surface of the protrusion, and the limited inclined surface is in contact with the limiting inclined surface.

[0008] Furthermore, the connecting member also includes a connecting plate portion, the other end of the limiting rod portion is fixedly connected to the connecting plate portion, and the connecting plate portion is fixedly connected to the upper connecting pipe section.

[0009] Furthermore, the lower end of the upper connecting pipe section is provided with a bending portion that bends inward, the bending portion is provided with the connecting hole, the upper end of the lower connecting pipe section is sleeved on the outside of the bending portion, and the inner wall of the bending portion is provided with an extending fixing portion that extends along the axial direction of the upper connecting pipe section, and the extending fixing portion is fixedly connected to the connecting plate portion.

[0010] Furthermore, the other end of the limiting rod is fixedly connected to the middle of the connecting plate portion, and two extending fixing portions are provided on the inner wall of the bending portion, and the two extending fixing portions are respectively fixedly connected to the upper and lower ends of the connecting plate portion.

[0011] Furthermore, the extending fixing portion is fixedly connected to the connecting plate portion by bolts.

[0012] Furthermore, the extending fixing portion is provided with a first threaded hole, the connecting plate portion is provided with a second threaded hole, and the bolt is passed through the first threaded hole and the second threaded hole.

[0013] Furthermore, an outer contact surface is provided on the outer wall of the bending portion, the protrusion is provided on the inner wall of the lower connecting pipe section, and an inner contact surface is provided on the inner wall of the protrusion, and the inner contact surface is in contact with the outer contact surface.

[0014] Furthermore, the cross section of the limiting rod is rectangular, and the cross section of the connecting hole is rectangular.

[0015] As described above, the connection structure between segmented tubular components according to the present invention has the following beneficial effects:

[0016] When it is necessary to connect the upper connecting pipe section with the lower connecting pipe section, the upper connecting pipe section is sleeved on the lower connecting pipe section, and the limiting part on the upper connecting pipe section contacts the upper end face of the protrusion on the lower connecting pipe section. By utilizing the sleeve relationship between the two, the radial movement of the lower connecting pipe section relative to the upper connecting pipe section is limited, and then the limiting rod part of the connecting piece is inserted into the connecting hole of the upper connecting pipe section until one end of the limiting rod part passes through the connecting hole and contacts the lower end face of the protrusion on the lower connecting pipe section. Combined with the contact effect of the limiting part and the upper end face of the protrusion, the axial movement of the lower connecting pipe section relative to the upper connecting pipe section is limited, thereby realizing the connection between the upper connecting pipe section and the lower connecting pipe section. Compared with the prior art that directly utilizes the threaded connection relationship between flanges to withstand axial forces, this connection structure has greater connection strength, better fatigue resistance and higher reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a stereoscopic diagram of the connection structure between segmented tubular components in an embodiment of the present invention.

[0018] Figure 2Schematic diagram of the connection structure between segmented tubular components in an embodiment of the present invention.

[0019] Figure 3 It is a stereoscopic view of the upper connecting pipe section in an embodiment of the present invention.

[0020] Figure 4 Schematic diagram of the upper connecting pipe section in an embodiment of the present invention.

[0021] Figure 5 Schematic diagram of the lower connecting pipe section in an embodiment of the present invention.

[0022] Figure 6 Schematic diagram of the distribution of connecting parts in an embodiment of the present invention.

[0023] Figure 7 Schematic diagram of the structure of the connecting member in an embodiment of the present invention.

[0024] Figure 8 It is a schematic diagram of the connection between the upper connecting pipe section, the lower connecting pipe section and the connecting piece in an embodiment of the present invention.

[0025] Component number description

[0026] 1 Upper connecting pipe section

[0027] 11 Connection hole

[0028] 12 Bending part

[0029] 13 Extended fixing part

[0030] 131 First threaded hole

[0031] 14 Limit plane

[0032] 2 Lower connecting pipe section

[0033] 21 bulge

[0034] 211 Limited inclined plane

[0035] 3 Connectors

[0036] 31 Limit rod

[0037] 311 Limiting slope

[0038] 32 Connecting plate

[0039] 321 Second threaded hole

[0040] 4 Bolts DETAILED DESCRIPTION

[0041] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0042] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportion relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0043] like Figures 1 to 8 As shown, this embodiment provides a connection structure between segmented tubular components, including an upper connecting pipe segment 1, a lower connecting pipe segment 2 sleeved on the upper connecting pipe segment 1 and a connecting piece 3, the upper end of the lower connecting pipe segment 2 is provided with a protrusion 21, the upper connecting pipe segment 1 is provided with a limiting portion in contact with the upper end surface of the protrusion 21, the upper connecting pipe segment 1 is provided with a connecting hole 11, the connecting piece 3 includes a limiting rod portion 31 passed through the connecting hole 11, and one end of the limiting rod portion 31 passes through the connecting hole 11 and contacts with the lower end surface of the protrusion 21. When it is necessary to connect the upper connecting pipe section 1 with the lower connecting pipe section 2, the upper connecting pipe section 1 is sleeved on the lower connecting pipe section 2, and the limiting portion on the upper connecting pipe section 1 contacts the upper end surface of the protrusion 21 on the lower connecting pipe section 2. The sleeve relationship between the two is used to limit the radial movement of the lower connecting pipe section 2 relative to the upper connecting pipe section 1, and then the limiting rod portion 31 of the connecting member 3 is inserted into the connecting hole 11 of the upper connecting pipe section 1 until one end of the limiting rod portion 31 passes through the connecting hole 11 and contacts the lower end surface of the protrusion 21 on the lower connecting pipe section 2. Combined with the contact effect of the limiting portion and the upper end surface of the protrusion 21, the axial movement of the lower connecting pipe section 2 relative to the upper connecting pipe section 1 is limited, thereby realizing the connection between the upper connecting pipe section 1 and the lower connecting pipe section 2. Compared with the prior art that directly uses the threaded connection relationship between flanges to withstand axial forces, this connection structure has greater connection strength, better fatigue resistance and higher reliability.

[0044] like Figure 7 and Figure 8As shown, in this embodiment, a limiting inclined surface 311 is provided at one end of the limiting rod 31, and the limiting inclined surface 311 contacts the lower end surface of the protrusion 21. When the limiting rod 31 is inserted into the connecting hole 11, after one end of the limiting rod 31 passes through the connecting hole 11, its limiting inclined surface 311 contacts the lower end surface of the protrusion 21, and as the limiting rod 31 continues to move, the limiting inclined surface 311 will push the protrusion 21 and the lower connecting pipe section 2 to move relative to the upper connecting pipe section 1 and move toward the limiting portion, so that the limiting portion is in tight contact with the upper end surface of the protrusion 21, and the limiting inclined surface 311 is in tight contact with the lower end surface of the protrusion 21, thereby effectively limiting the axial movement of the upper connecting pipe section 1 relative to the lower connecting pipe section 2, and limiting the circumferential rotation of the upper connecting pipe section 1 relative to the lower connecting pipe section 2. The limiting inclined surface 311 plays a role of gradual locking. At the same time, the limiting slope 311 also plays a guiding role, which can guide the limiting slope 311 to gradually contact the lower end surface of the protrusion 21, so as to avoid the limiting rod 31 from being blocked when contacting the protrusion 21, thereby causing one end of the limiting rod 31 to be unable to contact the lower end surface of the protrusion 21. Figure 8 As shown, in this embodiment, the lower end surface of the protrusion 21 is provided with a limited inclined surface 211, and the limited inclined surface 211 is in contact with the limiting inclined surface 311, that is, the limited inclined surface 211 and the limiting inclined surface 311 have the same inclination angle, so as to ensure that the limited inclined surface 211 can have a good contact relationship with the limiting inclined surface 311, and increase the contact area between the protrusion 21 and the limiting rod portion 31. In this embodiment, the limiting portion on the upper connecting pipe section 1 includes a limiting plane 14, which is in contact with the upper end surface of the protrusion 21.

[0045] like Figure 7 and Figure 8 As shown, in this embodiment, the connector 3 also includes a connecting plate portion 32, and the other end of the limiting rod portion 31 is fixedly connected to the connecting plate portion 32, and the connecting plate portion 32 is fixedly connected to the upper connecting pipe section 1. After the limiting rod portion 31 is inserted into the setting position in the connecting hole 11, the connecting plate portion 32 is fixedly connected to the upper connecting pipe section 1, so that the limiting rod portion 31 is fixed at the current position and the limiting rod portion 31 maintains a contact and matching relationship with the protrusion 21. At the same time, as Figure 4 and Figure 8 As shown, in this embodiment, the lower end of the upper connecting pipe section 1 is provided with a bending portion 12 that bends inward, and the bending portion 12 is provided with the connecting hole 11. The upper end of the lower connecting pipe section 2 is sleeved on the outside of the bending portion 12, and the inner wall of the bending portion 12 is provided with an extending fixing portion 13 extending along the axial direction of the upper connecting pipe section 1. The extending fixing portion 13 is fixedly connected to the connecting plate portion 32. This structural design can reduce the space occupied by the connecting structure in the radial direction, facilitate assembly, and enhance the connection strength. Figure 7 and Figure 8As shown, in this embodiment, the other end of the limiting rod 31 is fixedly connected to the middle of the connecting plate 32, and two extending fixing portions 13 are provided on the inner wall of the bending portion 12. The two extending fixing portions 13 are respectively fixedly connected to the upper and lower ends of the connecting plate 32 to enhance the connection strength between the connecting plate 32 and the upper connecting pipe section 1, thereby enhancing the fixing ability of the limiting rod 31. In addition, as Figure 8 As shown, in this embodiment, the extended fixing portion 13 is fixedly connected to the connecting plate portion 32 by bolts 4, so as to realize a detachable connection between the connecting plate portion 32 and the extended fixing portion 13, which is convenient for connecting the connecting member 3 and the upper connecting pipe section 1 on site, and convenient for removing the connecting member 3 when necessary, thereby disconnecting the connection between the upper connecting pipe section 1 and the lower connecting pipe section 2. Figure 4 and Figure 7 As shown, in this embodiment, a first threaded hole 131 is provided on the extension fixing portion 13, and a second threaded hole 321 is provided on the connecting plate portion 32. The bolt 4 is passed through the first threaded hole 131 and the second threaded hole 321 to enhance the connection strength between the extension fixing portion 13 and the connecting plate portion 32 and the bolt 4.

[0046] In this embodiment, an outer contact surface is provided on the outer wall of the bending portion 12, the protrusion 21 is provided on the inner wall of the lower connecting pipe section 2, and an inner contact surface is provided on the inner wall of the protrusion 21, and the inner contact surface contacts the outer contact surface to limit the radial movement of the lower connecting pipe section 2 relative to the upper connecting pipe section 1. In this embodiment, the protrusion 21 is an annular structure protruding inward.

[0047] like Figure 4 and Figure 7 As shown, in this embodiment, the cross section of the limiting rod 31 is rectangular, and the cross section of the connecting hole 11 is rectangular. In this way, after the limiting rod 31 is inserted into the connecting hole 11, the matching relationship between the two and the characteristics of the rectangular cross sections of the two can prevent the limiting rod 31 from rotating relative to the connecting hole 11. In this way, after the limiting rod 31 is inserted into the connecting hole 11 and the position is set, it can ensure that the limiting rod 31 and the protrusion 21 maintain a good contact and matching relationship, and ensure that the two second threaded holes 321 on the connecting plate portion 32 correspond to the two first threaded holes 131 respectively, thereby facilitating the installation of the bolt 4. The specific sizes of the limiting rod 31 and the connecting hole 11 in this embodiment are designed according to the use requirements.

[0048] In this embodiment, the upper end of the upper connecting pipe segment 1 is fixedly connected to the upper tubular component, and the lower end of the lower connecting pipe segment 2 is fixedly connected to the lower tubular component. Combined with the connection relationship between the upper connecting pipe segment 1 and the lower connecting pipe segment 2, the connection between the upper tubular component and the lower tubular component is achieved.

[0049] The connection structure between the segmented tubular components in this embodiment can be applied to various large-scale pipelines, towers, etc. in marine engineering, petrochemical facilities and wind power fields. When the connection structure between the segmented tubular components is used to connect two segments of tubular components, the construction difficulty is small, the stability is high, the later maintenance cost is low, and it can adapt to the complex and changeable external environmental load.

[0050] In this embodiment, the connecting hole 11 extends along the radial direction of the upper connecting pipe section 1. Figures 1 to 4 As shown, the bent portion 12 is provided with a plurality of connection holes 11 evenly distributed along the circumferential direction. A first threaded hole 131 is provided above and below each connection hole 11. A connection member 3 is installed in each connection hole 11.

[0051] When the connection structure between segmented tubular components in this embodiment is used to connect two segments of tubular components, the specific operation steps are as follows:

[0052] First, the upper end of the upper connecting pipe section 1 is fixedly connected to the upper tubular component, and the lower end of the lower connecting pipe section 2 is fixedly connected to the lower tubular component, and the upper connecting pipe section 1 is hung to the corresponding position on the lower connecting pipe section 2, so that the bending portion 12 at the lower end of the upper connecting pipe section 1 is sleeved inside the upper end of the lower connecting pipe section 2, and the limiting plane 14 is tightly matched with the upper end surface of the protrusion 21, and the inner contact surface and the outer contact surface are tightly matched; then, the limiting rod 31 of the connecting member 3 is inserted into the connecting hole 11, and the two second threaded holes 321 of the connecting member 3 correspond to the two first threaded holes 131 respectively, and the limiting inclined surface 311 of the limiting rod 31 is fitted with the limited inclined surface 211 on the protrusion 21; finally, the bolts 4 are inserted into the corresponding threaded holes, and each connecting member 3 is fixed to the bending portion 12 by two bolts 4, so that the upper connecting pipe section 1, the lower connecting pipe section 2 and the connecting member 3 are tightly connected together, and the radial movement of the connecting member 3 is also limited.

[0053] In the prior art, the tubular structure is connected in sections through flanges and bolts 4, and the axial connection force between the sections is directly transmitted to the bolts 4, which places high demands on the strength and fatigue of the bolts 4. In contrast, the principle of the connection structure and connection method provided by the present invention is that the huge axial connection force between the upper connecting pipe section 1 and the lower connecting pipe section 2 is transmitted to the bolts 4 through the connector 3, and the contact between the limiting inclined surface 311 and the limited inclined surface 211, and the contact between the limiting rod 31 and the connecting hole 11 are equivalent to forming a lever, and the force transmitted to the bolt 4 is much smaller than the axial force, thereby ensuring the safety of the bolt 4 during operation. Therefore, the connection force of this connection structure is greater, the fatigue performance is better, and it is safer and more reliable.

[0054] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0055] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A connection structure between segmented tubular components, characterized in that: The invention comprises an upper connecting pipe section (1), a lower connecting pipe section (2) sleeved on the upper connecting pipe section (1), and a connecting piece (3); the upper end of the lower connecting pipe section (2) is provided with a protrusion (21); the upper connecting pipe section (1) is provided with a limiting portion in contact with the upper end surface of the protrusion (21); the upper connecting pipe section (1) is provided with a connecting hole (11); the connecting piece (3) comprises a limiting rod portion (31) penetrating the connecting hole (11); and one end of the limiting rod portion (31) passes through the connecting hole (11) and contacts with the lower end surface of the protrusion (21); The cross section of the limiting rod portion (31) is rectangular, and the cross section of the connecting hole (11) is rectangular.

2. The connection structure between segmented tubular components according to claim 1, characterized in that: One end of the limiting rod (31) is provided with a limiting inclined surface (311), and the limiting inclined surface (311) is in contact with the lower end surface of the protrusion (21).

3. The connection structure between segmented tubular components according to claim 2, characterized in that: The lower end surface of the protrusion (21) is provided with a limited inclined surface (211), and the limited inclined surface (211) is in contact with the limiting inclined surface (311).

4. The connection structure between segmented tubular components according to claim 1, characterized in that: The connecting member (3) further comprises a connecting plate portion (32), the other end of the limiting rod portion (31) is fixedly connected to the connecting plate portion (32), and the connecting plate portion (32) is fixedly connected to the upper connecting pipe section (1).

5. The connection structure between segmented tubular components according to claim 4, characterized in that: The lower end of the upper connecting pipe section (1) is provided with a bending portion (12) bent inwardly, and the bending portion (12) is provided with the connecting hole (11). The upper end of the lower connecting pipe section (2) is sleeved on the outside of the bending portion (12), and the inner wall of the bending portion (12) is provided with an extending fixing portion (13) extending along the axial direction of the upper connecting pipe section (1), and the extending fixing portion (13) is fixedly connected to the connecting plate portion (32).

6. The connection structure between segmented tubular components according to claim 5, characterized in that: The other end of the limiting rod portion (31) is fixedly connected to the middle portion of the connecting plate portion (32), and two extending fixing portions (13) are provided on the inner wall of the bending portion (12), and the two extending fixing portions (13) are respectively fixedly connected to the upper and lower ends of the connecting plate portion (32).

7. The connection structure between segmented tubular components according to claim 5, characterized in that: The extended fixing portion (13) is fixedly connected to the connecting plate portion (32) via bolts (4).

8. The connection structure between segmented tubular components according to claim 7, characterized in that: The extending fixing portion (13) is provided with a first threaded hole (131), the connecting plate portion (32) is provided with a second threaded hole (321), and the bolt (4) is inserted into the first threaded hole (131) and the second threaded hole (321).

9. The connection structure between segmented tubular components according to claim 5, characterized in that: An outer contact surface is provided on the outer wall of the bending portion (12), the protrusion (21) is provided on the inner wall of the lower connecting pipe section (2), and an inner contact surface is provided on the inner wall of the protrusion (21), and the inner contact surface is in contact with the outer contact surface.

Images