Pipe jacking grouting construction resistance reduction device
By designing a grouting construction drag reduction device for pipe hoisting construction, the problems of high ejection pressure and easy rupture of pipes in traditional pipe hoisting construction are solved, and the effect of reducing friction resistance and improving construction safety and efficiency is achieved.
Patent Information
- Application Number
- CN202421784078.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-26
AI Technical Summary
In traditional pipe hoisting construction, the pipe hoisting pipe is prone to rupture, the length of the pipe is limited, and the resistance to the pipe is large, which has construction problems and safety hazards. As the pressure of the pipe increases, the work well needs to increase costs and manpower and material resources.
A resistance reduction device for the top pipe grouting construction is designed, including grouting main pipe, grouting pipeline, grouting hole, pipe body, base, external threaded pipe, internal thread sleeve, baffle plate, and valve. The grouting hole inserted on the top pipe body through the grouting pipeline is inserted into the thread of the grouting pipeline, and the threads of the internal thread sleeve and the external threaded pipe are used to engage the baffle plate and grouting pipeline to move, and after fixing, thixotropic mud is injected to form a mud sleeve to reduce friction resistance.
By forming a mud sleeve with a small friction coefficient with the hoisting pipe body, the suction pressure of the hoisting pipe body is reduced, the phenomenon of frequent increase in work wells is avoided, labor and materials are saved, and construction safety and efficiency are improved.
Smart Images
Figure CN222823837U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipe jacking construction, in particular to a resistance reducing device for pipe jacking grouting construction. Background Art
[0002] In the construction of urban municipal roads and highways, traditional pipe jacking construction generally uses jacking equipment to push the pipe along a fixed track, and then uses transportation equipment to transport the soil out of the pipe to achieve the purpose of jacking. During the jacking process, the pipe is prone to rupture, the jacking length is limited, and the jacking resistance is large, which poses certain construction difficulties and safety hazards.
[0003] In the prior art, as the length of the jacking pipe increases, the jacking pressure becomes greater, which can easily cause the pipe to rupture. At the same time, as the jacking pressure increases, the jacking length at one time will be limited. The jacking construction is continued by adding working wells, which increases costs, consumes manpower, material resources and time. Utility Model Content
[0004] The utility model aims to solve the problems raised in the background technology and provides a resistance reducing device for grouting construction of jacking pipe.
[0005] The technical solution of the utility model to achieve the above purpose is as follows:
[0006] A drag reduction device for jacking grouting construction, comprising a grouting main pipe, a grouting pipe, a grouting hole, a jacking pipe body, a base, an externally threaded pipe, an internally threaded sleeve, a baffle, and a valve. The grouting main pipe is fixedly connected to one end of the grouting pipe, and the other end of the grouting pipe is inserted into the grouting hole. The grouting hole is opened on the jacking pipe body, the base is fixedly connected to the jacking pipe body, the externally threaded pipe is fixedly connected to the base, the internally threaded sleeve is sleeved on the grouting pipe, the internally threaded sleeve is connected to the externally threaded pipe by threaded engagement, the grouting pipe is fixedly connected to the baffle, and there are two valves, one of which is fixedly connected to the grouting main pipe, and the other is fixedly connected to the grouting pipe.
[0007] Preferably, each section of the jacking pipe body is provided with three grouting holes, and the three grouting holes are evenly arranged at 120° along the jacking pipe body.
[0008] Preferably, a sealing rubber ring is provided on the baffle, and the sealing rubber ring is sleeved on the grouting pipe and fixedly connected to the baffle.
[0009] Preferably, a plug is provided on the externally threaded pipe, and the plug is engaged and connected with the externally threaded pipe.
[0010] Preferably, a sealing rubber ring is provided in the plug, and the sealing rubber ring is fixedly connected to the plug.
[0011] Preferably, a one-way valve is provided on the grouting pipeline, and the one-way valve is fixedly connected to the grouting pipeline.
[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0013] The utility model provides a drag reduction device for grouting construction of a jacking pipe. Through its structural design, a grouting hole is firstly drilled on a jacking pipe body, and then a base is fixed to the jacking pipe body at the position of the grouting hole. Then one end of a grouting pipe with a valve is inserted into the grouting hole, and the other end of the grouting pipe is connected to a grouting main pipe. After the grouting pipe is inserted into the grouting hole on the jacking pipe body, an internal threaded sleeve on the grouting pipe is rotated, and the internal threaded sleeve engages with the external threaded pipe when rotating, thereby moving in the direction of the external threaded pipe. When the internal threaded sleeve moves, it drives a baffle plate to move in the direction of the external threaded pipe, and the movement of the baffle plate leads the grouting pipe to move. When the external threaded pipe is completely engaged with the internal threaded sleeve, the baffle plate on the grouting pipe is limited between the external threaded pipe and the internal threaded sleeve, thereby preventing the grouting pipe from moving. After the grouting pipe is fixed, the grouting pump is started to inject the thixotropic mud into the grouting pipe along the grouting pipe. The valves on the grouting main pipe and the grouting pipe enable the construction personnel to grout the outside of the jacking pipe body in sections to improve the grouting effect. Then, the grouting pipe is pressed into the gap between the jacking pipe body and the soil from the grouting hole, and continuously expands to the surroundings. Then, the grouting pipe is connected to each other horizontally and vertically to form a layer of mud sleeve surrounding the jacking pipe body. The mud sleeve separates the jacking pipe body from the soil and eliminates the friction resistance of the soil. The friction coefficient between the thixotropic mud and the jacking pipe body is much smaller than the friction coefficient between the pipe wall and the soil. Compared with the prior art, the utility model greatly ensures the safety and stability of the pipeline during jacking construction. By forming a mud sleeve with a small friction coefficient with the jacking pipe body to wrap the jacking pipe body, the jacking pressure of the jacking pipe body is reduced, and the phenomenon of frequent increase of working wells due to the jacking pressure in traditional jacking construction is solved, saving a lot of labor and materials, and reducing the waste of resources. Compared with traditional jacking construction, the safety is improved and the construction efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the drag reduction device for grouting construction of jacking pipe described in the utility model.
[0015] Figure 2 yes Figure 1 Schematic diagram of the internal structure at A shown.
[0016] Figure 3 It is a schematic diagram of the structure after the grouting pipeline and the external threaded pipe of the utility model are removed.
[0017] In the figure: 1. Grouting main pipe; 2. Grouting pipe; 3. Grouting hole; 4. Jacking pipe body; 5. Base; 6. Externally threaded pipe; 7. Internally threaded sleeve; 8. Baffle; 9. Sealing rubber ring; 10. Plug; 11. One-way valve; 12. Valve. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] In the description of the present invention, it should be noted that the terms "upper / lower end", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting / sleeving", "sleeve connection", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0021] See also Figure 1-3The utility model provides a technical solution: a drag reduction device for jacking grouting construction, comprising a grouting main pipe 1, a grouting pipe 2, a grouting hole 3, a jacking pipe body 4, a base 5, an externally threaded pipe 6, an internally threaded sleeve 7, a baffle 8, and a valve 12; the grouting main pipe 1 is fixedly connected to one end of the grouting pipe 2, the other end of the grouting pipe 2 is inserted into the grouting hole 3, the grouting hole 3 is opened on the jacking pipe body 4, the base 5 is fixedly connected to the jacking pipe body 4, the externally threaded pipe 6 is fixedly connected to the base 5, the internally threaded sleeve 7 is sleeved on the grouting pipe 2, the internally threaded sleeve 7 is connected to the externally threaded pipe 6 by threaded engagement, the grouting pipe 2 is fixedly connected to the baffle 8, the baffle 8 is arranged on the grouting pipe 2 on a pipe section between its pipe mouth and the internally threaded sleeve 7, there are two valves 12, one of which is installed on the grouting main pipe 1, and the other is installed on the grouting pipe 2.
[0022] In the utility model, each section of the jacking pipe body 4 is provided with three grouting holes 3, and the three grouting holes 3 are evenly arranged at 120° along the jacking pipe body 4; through the three grouting holes 3 evenly distributed at 120° along the jacking pipe body 4, the thixotropic mud can wrap the jacking pipe body 4 more comprehensively.
[0023] In the utility model, a sealing rubber ring 9 is provided on the baffle plate 8, and the sealing rubber ring 9 is sleeved on the grouting pipe 2 and fixedly connected to the baffle plate 8; the sealing rubber ring 9 on the baffle plate 8 can improve the sealing between the external threaded pipe 6 and the internal threaded sleeve 7.
[0024] In the utility model, a plug 10 is provided on the external threaded pipe 6, and the plug 10 is engaged with the external threaded pipe 6; after the grouting pipe 2 is pulled out from the grouting hole 3, the grouting hole 3 is sealed by screwing the plug 10 onto the external threaded pipe 6 to prevent external objects from entering the top pipe body 4.
[0025] In the utility model, a sealing rubber ring 9 is arranged in the plug 10 , and the sealing rubber ring 9 is fixedly connected to the plug 10 ; the sealing rubber ring 9 arranged in the plug 10 can improve the sealing between the plug 10 and the external threaded pipe 6 .
[0026] In the utility model, a one-way valve 11 is provided on the grouting pipe 2, and the one-way valve 11 is fixedly connected to the grouting pipe 2; the one-way valve 11 on the grouting pipe 2 prevents the thixotropic mud from flowing back from the outside of the jacking pipe body 4 during grouting, thereby affecting the grouting effect.
[0027] In this embodiment: first, a grouting hole 3 is drilled on the top pipe body 4, and then the base 5 is fixed to the top pipe body 4 at the position of the grouting hole 3. Then, one end of the grouting pipe 2 with the valve 12 is inserted into the grouting hole 3, and the other end of the grouting pipe 2 is connected to the grouting main pipe 1. After the grouting pipe 2 is inserted into the grouting hole 3 on the top pipe body 4, the internal threaded sleeve 7 on the grouting pipe 2 is rotated. When the internal threaded sleeve 7 rotates, it engages with the external threaded pipe 6, thereby moving toward the external threaded pipe 6. When the internal threaded sleeve 7 moves, it drives the baffle 8 to move toward the external threaded pipe 6. The movement of the baffle 8 drives the grouting pipe 2 to move. When the external threaded pipe 6 is completely engaged with the internal threaded sleeve 7, the baffle 8 on the grouting pipe 2 is limited between the external threaded pipe 6 and the internal threaded sleeve 7, thereby preventing the grouting pipe 2 from moving. The sealing rubber ring 9 on the baffle 8 can improve the sealing between the external threaded pipe 6 and the internal threaded sleeve 7. After the grouting pipe 2 is fixed, the grouting pump is started to inject the thixotropic mud into the grouting pipe 2 along the grouting pipe 1. The valves 12 on the grouting main pipe 1 and the grouting pipe 2 enable the construction personnel to grout the outside of the jacking pipe body 4 in sections to improve the grouting effect; then the thixotropic mud is pressed into the gap between the jacking pipe body 4 and the soil from the grouting hole 3 along the grouting pipe 2, and continuously expands to the surroundings. Each section of the jacking pipe body 4 has three grouting holes 3 evenly distributed at 120° along the jacking pipe body 4, so that the thixotropic mud can be more comprehensive for the jacking pipe The 4 body is wrapped, and then the slurry sleeve is interconnected horizontally and vertically to form a layer of slurry sleeve surrounding the jacking pipe body 4. The slurry sleeve isolates the jacking pipe body 4 from the soil, eliminating the friction resistance of the soil, and the friction coefficient between the thixotropic mud and the jacking pipe body 4 is much smaller than the friction coefficient between the pipe wall and the soil. The slurry sleeve with a small friction coefficient with the jacking pipe body 4 wraps the jacking pipe body 4, reducing the jacking pressure of the jacking pipe body 4. The one-way valve 11 on the grouting pipe 2 prevents the thixotropic mud from flowing back from the outside of the jacking pipe body 4 during grouting, thereby affecting the grouting effect. After the use of the utility model is completed, the internal threaded sleeve 7 is rotated counterclockwise until the internal threaded sleeve 7 is removed from the external threaded pipe 6. At this time, the grouting pipe 2 is also pulled out from the grouting hole 3. After pulling out, the grouting hole 3 is blocked by screwing the plug 10 onto the external threaded pipe 6 to prevent external objects from entering the inside of the jacking pipe body 4.
[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".
[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A drag reduction device for pipe grouting construction, characterized in that: The invention comprises a grouting main pipe (1), a grouting pipe (2), a grouting hole (3), a jacking pipe body (4), a base (5), an externally threaded pipe (6), an internally threaded sleeve (7), a baffle (8), and a valve (12); the grouting main pipe (1) is fixedly connected to one end of the grouting pipe (2); the other end of the grouting pipe (2) is inserted into the grouting hole (3); the grouting hole (3) is opened on the jacking pipe body (4); the base (5) is fixedly connected to the jacking pipe body (4); the externally threaded pipe (6) is fixedly connected to the base (5); the internally threaded sleeve (7) is sleeved on the grouting pipe (2); the internally threaded sleeve (7) is connected to the externally threaded pipe (6) by threaded engagement; the grouting pipe (2) is fixedly connected to the baffle (8); and there are two valves (12), one of which is installed on the grouting main pipe (1) and the other is installed on the grouting pipe (2).
2. The drag reduction device for pipe grouting construction according to claim 1, characterized in that: Each section of the jacking pipe body (4) is provided with three grouting holes (3), and the three grouting holes (3) are evenly arranged at 120° along the jacking pipe body (4).
3. The drag reduction device for pipe grouting construction according to claim 1, characterized in that: The baffle plate (8) is provided with a sealing rubber ring (9), and the sealing rubber ring (9) is sleeved on the grouting pipe (2) and fixedly connected to the baffle plate (8).
4. The drag reduction device for pipe grouting construction according to claim 1, characterized in that: A plug (10) is provided on the externally threaded tube (6), and the plug (10) is engaged and connected with the externally threaded tube (6).
5. The drag reduction device for pipe grouting construction according to claim 4 is characterized in that: A sealing rubber ring (9) is arranged inside the plug (10), and the sealing rubber ring (9) is fixedly connected to the plug (10).
6. The drag reduction device for pipe grouting construction according to claim 1, characterized in that: The grouting pipeline (2) is provided with a one-way valve (11), and the one-way valve (11) is fixedly connected to the grouting pipeline (2).