Manhole neck tube welding structure and immersed tube structure
By adding reinforcement patches between the neck pipe and the pipeline during the construction of the immersed tube and performing multiple welding fixes, the problem of low welding connection strength and sealing performance in the prior art is solved, and the stability and service life of the pipeline are significantly improved.
Patent Information
- Application Number
- CN202421542003.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-07-02
AI Technical Summary
During the construction of existing immersed pipes, the welding connection strength and sealing performance of the manhole structure are not high, resulting in insufficient stability and service life of the pipe.
Add reinforcement patches between the neck tube and the pipeline, and the reinforcement patches are welded and fixed with the neck tube and the pipeline through multiple ring welds and plug welds to form an indirect connection structure to improve the strength and sealing performance of the welding connection.
By adding reinforcement patch panels, the welding connection strength and sealing performance between the neck tube and the pipe are significantly improved, and the service life of the pipe is extended.
Smart Images
Figure CN222669310U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of immersed tube manholes, and in particular to a manhole neck pipe welding structure and an immersed tube structure. Background Art
[0002] During the construction of immersed pipes, after the pipe joints are connected above the water, the inner side of the pipe needs to be patched on the welded interface. Therefore, a manhole structure needs to be opened on the immersed pipe to facilitate workers to enter during construction. In addition, the manhole structure is generally permanently retained on the pipe so that people can enter and exit for maintenance after the construction is completed. The manhole structure is formed by welding the neck pipe and the pipe. Currently, most welds are only set at the contact between the outer side of the neck pipe and the inner wall of the pipe manhole. There is a lack of reinforcement structure, and the welding connection strength and sealing performance are not high. Utility Model Content
[0003] The problem to be solved by the utility model is to provide a manhole neck pipe welding structure and a immersed pipe structure, and a reinforcing plate is added between the neck pipe and the pipeline, so that the welding connection strength and sealing performance between the two are greatly improved.
[0004] In order to solve the above technical problems, the utility model provides a manhole neck pipe welding structure, comprising a neck pipe, a pipe and a reinforcing plate; one end of the neck pipe extends into the manhole opened on the pipe, and the inner wall surface of the manhole is in contact with the outer side surface of the neck pipe; the reinforcing plate is in a ring-like plate shape, the inner hole wall surface is in contact with the outer side surface of the neck pipe, and one side plate surface is in contact with the outer side surface of the pipe;
[0005] A first ring weld is provided between the manhole of the pipe and the outer side surface of the neck pipe; a second ring weld is provided between the inner hole end of the reinforcement plate and the outer side surface of the neck pipe, a plug weld is provided between the middle part of the reinforcement plate and the outer side surface of the pipe, and a third ring weld is provided between the outer edge end of the reinforcement plate and the outer side surface of the pipe.
[0006] In the above-mentioned manhole neck pipe welding structure, a reinforcement plate is added to the welding structure of the neck pipe and the pipeline, the plate body of the reinforcement plate is welded and fixed to the outer side surface of the pipeline, and the inner ring end is welded and fixed to the outer side surface of the neck pipe. An indirect connection weld is added on the basis of the original welding connection structure between the neck pipe and the pipeline, so that the welding connection strength and sealing performance between the neck pipe and the pipeline are greatly improved.
[0007] Furthermore, the axes of the neck tube and the manhole coincide with each other; viewed along the axial direction of the manhole, the reinforcing plate is elliptical, and the major axis of the ellipse is arranged along the axial direction of the pipe.
[0008] Furthermore, the reinforcing plate is provided with a plurality of plug welding holes, and the plug welding holes are used to form the plug welding seam. Preferably, the plug welding holes are arranged at intervals along the circumference of the manhole.
[0009] Further, the first girth weld is a butt weld, which realizes fixed connection and sealing between the manhole of the pipeline and the outer side surface of the neck pipe. Preferably, the first girth weld is a fillet joint butt weld.
[0010] Furthermore, the second ring weld is a combined weld of a butt weld and a fillet weld, so as to achieve a fixed connection and sealing between the inner hole end of the reinforcement plate and the outer side surface of the neck tube.
[0011] Further, the third girth weld is a fillet weld, which realizes fixed connection and sealing between the outer edge end of the reinforcement plate and the outer side surface of the pipeline. Preferably, the third girth weld is a lap joint fillet weld.
[0012] Furthermore, the thickness of the reinforcing plate is the same as the wall thickness of the pipe.
[0013] In order to solve the above technical problems, the utility model provides a immersed tube structure on the other hand, including the above-mentioned manhole neck tube welding structure, and also includes a neck end flange arranged on the other end of the neck tube and a flange cover plate fixedly covered on the neck end flange to achieve the closure of the manhole.
[0014] Furthermore, a rotating shaft is provided between the flange cover plate and the neck end flange, so that the flange cover plate can be flipped open.
[0015] In summary, the use of the above-mentioned manhole neck pipe welding structure and immersed pipe structure can greatly improve the welding connection strength and sealing between the neck pipe and the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In the attached picture:
[0017] Figure 1 This is a schematic diagram of the immersed tube structure of the utility model.
[0018] Figure 2 for Figure 1 AA section view of the local diagram.
[0019] Figure 3 for Figure 2 BB section partial schematic diagram in.
[0020] Figure 4 for Figure 2 A partial schematic diagram of the CC section view.
[0021] Figure 5 for Figure 4 Enlarged view of part D in .
[0022] In the figure, 1, neck tube; 2, pipeline; 21, manhole; 3, reinforcement plate; 31, plug welding hole; 41, first ring weld; 42, second ring weld; 43, third ring weld; 51, neck end flange; 52, flange cover plate; 53, rotating shaft. DETAILED DESCRIPTION
[0023] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation modes is used to help understand the present invention, but does not constitute a limitation of the present invention.
[0024] Example 1
[0025] Figure 1-5 The utility model shows a manhole neck pipe welding structure. The manhole neck pipe welding structure includes a neck pipe 1, a pipe 2 and a reinforcing plate 3; one end of the neck pipe 1 extends into a manhole 21 opened on the pipe 2, and the inner wall surface of the manhole 21 fits with the outer side surface of the neck pipe 1; the reinforcing plate 3 is in a ring-like plate shape, the inner hole wall surface fits with the outer side surface of the neck pipe 1, and one side plate surface fits with the outer side surface of the pipe 2. A first ring weld 41 is provided between the manhole 21 of the pipe 2 and the outer side surface of the neck pipe 1; a second ring weld 42 is provided between the inner hole end of the reinforcing plate 3 and the outer side surface of the neck pipe 1, a plug weld is provided between the middle part of the reinforcing plate 3 and the outer side surface of the pipe 2, and a third ring weld 43 is provided between the outer edge end of the reinforcing plate 3 and the outer side surface of the pipe 2.
[0026] Optionally, the axes of the neck tube 1 and the manhole 21 coincide with each other. Figure 2 As shown, viewed along the axial direction of the manhole 21 , the reinforcing plate 3 is elliptical, and the major axis of the ellipse is arranged along the axial direction of the pipeline 2 .
[0027] Optional, such as Figure 2-4 As shown, the reinforcing plate 3 is provided with a plurality of plug welding holes 31, and the plug welding holes 31 are used to form plug welding seams. Preferably, the plug welding holes 31 are arranged at intervals along the circumference of the manhole 21.
[0028] Optional, such as Figure 5 As shown, the first girth weld 41 is a butt weld, which realizes fixed connection and sealing between the manhole 21 of the pipeline 2 and the outer side of the neck pipe 1. Preferably, the first girth weld 41 is a fillet joint butt weld.
[0029] Optional, such as Figure 5 As shown, the second ring weld 42 is a combined weld of a butt weld and a fillet weld, which realizes a fixed connection and sealing between the inner hole end of the reinforcing plate 3 and the outer side surface of the neck tube 1 .
[0030] Optional, such as Figure 5As shown, the third girth weld 43 is a fillet weld, which realizes the fixed connection and sealing between the outer edge end of the reinforcing plate 3 and the outer side surface of the pipeline 2. Preferably, the third girth weld 43 is a lap joint fillet weld.
[0031] Optionally, the thickness of the reinforcing plate 3 is the same as the wall thickness of the pipe 2, so the structural strength is high and the reinforcing effect is good.
[0032] When in use, first insert one end of the neck tube 1 into the cavity iron plate 3 and the manhole 21 in turn, and weld the first ring weld 41 to weld and seal the neck tube 1 and the pipeline 2; then weld the plug weld and the third ring weld 43 to fix the reinforcing iron plate 3 and the pipeline 2; finally weld the second ring weld 42 to fix the reinforcing plate 3 and the neck tube 1. Thus, between the neck tube 1 and the pipeline 2, the original first ring weld 41 is not retained, and an indirect fixed structure consisting of the second ring weld 42, the third ring weld 43 and the plug weld is added, which has high strength and long service life.
[0033] Example 2
[0034] Figure 1 The utility model shows a manhole neck pipe welding structure. The immersed pipe structure includes the above-mentioned manhole neck pipe welding structure, and also includes a neck end flange 51 arranged on the other end of the neck pipe 1 and a flange cover plate 52 fixedly covering the neck end flange 51 to achieve the closure of the manhole 21.
[0035] Optionally, a rotating shaft 53 is provided between the flange cover plate 52 and the neck end flange 51 so that the flange cover plate 52 can be flipped open.
[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit its protection scope. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that after reading the utility model, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the utility model, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the utility model.
Claims
1. A manhole neck pipe welding structure, characterized in that: It comprises a neck tube (1), a pipe (2) and a reinforcing plate (3); one end of the neck tube (1) extends into a manhole (21) provided on the pipe (2), and the inner wall surface of the manhole (21) fits with the outer side surface of the neck tube (1); the reinforcing plate (3) is in the shape of a ring-shaped plate, the inner hole wall surface fits with the outer side surface of the neck tube (1), and one side plate surface fits with the outer side surface of the pipe (2); A first circumferential weld (41) is provided between the manhole (21) of the pipeline (2) and the outer side surface of the neck tube (1); a second circumferential weld (42) is provided between the inner hole end of the reinforcing plate (3) and the outer side surface of the neck tube (1); a plug weld is provided between the middle part of the reinforcing plate (3) and the outer side surface of the pipeline (2); and a third circumferential weld (43) is provided between the outer edge end of the reinforcing plate (3) and the outer side surface of the pipeline (2).
2. The manhole neck pipe welding structure according to claim 1, characterized in that: The axes of the neck tube (1) and the manhole (21) coincide with each other; viewed along the axial direction of the manhole (21), the reinforcing plate (3) is elliptical, and the major axis of the ellipse is arranged along the axial direction of the pipe (2).
3. The manhole neck pipe welding structure according to claim 1, characterized in that: The reinforcing plate (3) is provided with a plurality of plug welding holes (31), and the plug welding holes (31) are used to form the plug welding seams.
4. The manhole neck pipe welding structure according to claim 3, characterized in that: The plug welding holes (31) are arranged at intervals along the circumference of the manhole (21).
5. The manhole neck pipe welding structure according to claim 1, characterized in that: The first girth weld (41) is a butt weld.
6. The manhole neck pipe welding structure according to claim 1, characterized in that: The second girth weld (42) is a combined weld of a butt weld and a fillet weld.
7. The manhole neck pipe welding structure according to claim 1, characterized in that: The third girth weld (43) is a lap joint fillet weld.
8. The manhole neck pipe welding structure according to claim 1, characterized in that: The thickness of the reinforcing plate (3) is the same as the wall thickness of the pipe (2).
9. An immersed tube structure, characterized in that: It comprises the manhole neck pipe welding structure as claimed in any one of claims 1 to 8, and also comprises a neck end flange (51) arranged on the other end of the neck pipe (1) and a flange cover plate (52) fixedly covering the neck end flange (51).
10. The immersed tube structure according to claim 9, characterized in that: A rotating shaft (53) is arranged between the flange cover plate (52) and the neck end flange (51).