Pipeline horizontal directional drilling connector connection construction device and method

Abstract

The invention relates to the technical field of construction devices, in particular to a pipeline horizontal directional drilling connector connection construction device and method. According to the technical scheme, the buried pipe fixing device comprises a buried pipe and fixing assemblies installed at the two ends of the buried pipe, the fixing assemblies are fixed to the ends of the buried pipe and used for increasing the length of the two ends of the buried pipe after the buried pipe is drilled into the ground, and the two ends of the buried pipe can be bent into the horizontal state conveniently so as to be connected with a directly-buried laid pipeline; and the protective cylinder is installed on the fixing assembly in a sleeving mode and used for protecting the structure of the fixing assembly, the end, away from the fixing assembly, of the protective cylinder is fixedly connected with a lengthened cylinder, and the lengthened cylinder is sleeved with a lengthened pipe for a bent pipe. Precise alignment of the horizontal directional drilling pipeline and the horizontal pipeline can be achieved, welded junction stress concentration is eliminated, redundant pipe sections do not need to be cut, elbows do not need to be additionally arranged, the construction process is simplified, the construction cost is reduced, meanwhile, the pipeline welding quality, the structural stability and the circulation performance are improved, and the long-term use safety of the pipeline is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of construction equipment technology, and in particular to a construction device and method for connecting horizontal directional drilling joints for pipelines. Background Technology

[0002] Horizontal directional drilling (HDD) is a mature trenchless pipeline laying technology widely used in various pipeline projects, including water supply and drainage, oil and gas, and heating. It is particularly suitable for crossing highways, railways, rivers, buildings, and other locations unsuitable for open excavation. Its advantages, such as minimal environmental disturbance, high construction efficiency, and short construction period, have made it one of the mainstream methods in trenchless pipeline construction. However, in actual HDD operations, both the entry and exit points of the pipeline need to be set at certain angles to meet drilling requirements. The entry angle is typically controlled within the range of 8° to 18°, while the exit angle is generally 4° to 12°. Simultaneously, during the HDD process, various factors such as geological conditions and drilling accuracy control can easily cause the actual horizontal position of the pipeline at the entry and exit points to deviate. This can lead to difficulties in accurately connecting the two ends of the horizontal directional drilling to the subsequent horizontal pipelines, resulting in alignment problems.

[0003] In existing construction processes, pipe sections exceeding the required length are typically cut along the straight entry and exit points of the horizontal directional drilling, based on the pre-set laying depth of the buried pipeline. The cut ends are then butt-welded to the horizontal pipeline. However, this method not only fails to fundamentally solve the alignment difficulties but also makes it difficult to ensure precise alignment of the pipe ends during the process, easily leading to stress concentration at the weld joint, affecting the pipeline's welding quality and structural stability. Furthermore, to compensate for pipe end misalignment and angular deviations, additional elbow components are required in some scenarios. This not only increases construction procedures and costs but may also reduce the overall flow performance of the pipeline due to the added elbows, further impacting the construction quality and long-term safety of the pipeline project. Therefore, this application proposes a construction device and method for connecting pipe joints in horizontal directional drilling. Summary of the Invention

[0004] The purpose of this invention is to address the problems in the background technology where the horizontal directional drilling entry and exit points of pipelines have specific inclination angles and the horizontal position of the pipe opening is prone to deviation. Existing construction methods, such as cutting excess pipe sections and welding them together, cannot fundamentally solve the problem of difficulty in jointing and are prone to stress concentration at the weld joint. Adding elbows will increase construction procedures and costs, reduce pipeline flow performance, and affect construction quality and pipeline safety. The invention proposes a construction device and method for connecting horizontal directional drilling joints of pipelines.

[0005] On one hand, the present invention proposes a pipeline horizontal directional drilling joint connection construction device, including a buried pipe; fixing components installed at both ends of the buried pipe, the fixing components being fixed to the ends of the buried pipe for increasing the length of both ends of the buried pipe after the buried pipe is drilled into the ground, so as to facilitate bending both ends of the buried pipe into a horizontal state to connect to a directly buried pipeline; a protective sleeve installed on the fixing components, the protective sleeve being used to protect the structure of the fixing components, an extension sleeve being fixedly connected to the end of the protective sleeve away from the fixing components, and an extension pipe for bending pipe being sleeved on the extension sleeve.

[0006] Optionally, the buried pipe includes a horizontal pipe, with symmetrically arranged arc-shaped pipes fixedly connected to both ends of the horizontal pipe, and an inlet / outlet pipe fixedly connected to the end of the arc-shaped pipe away from the horizontal pipe.

[0007] Optionally, the fixing assembly includes a fixing plate disposed at the end of the inlet / outlet pipe away from the arc-shaped pipe. A fixing rod is fixedly connected to the fixing plate and passes through the inlet / outlet pipe. A fixing ring is fixedly sleeved at one end of the fixing rod in the inlet / outlet pipe. Multiple sets of first connecting seats are fixedly connected to the side of the fixing ring near the fixing plate. The multiple sets of first connecting seats are arranged in a circular array. First support rods are rotatably connected to both sides of the first connecting seats. Second connecting seats are rotatably connected to the ends of the two sets of first support rods away from the first connecting seats. A support plate is fixedly connected to the second connecting seat. A rubber pad is installed on the side of the support plate away from the second connecting seat.

[0008] Optionally, a third connecting seat is fixedly connected to the side of the support plate away from the rubber pad. A second support rod is rotatably connected to both sides of the third connecting seat. A fourth connecting seat is rotatably connected to the end of each of the two sets of second support rods away from the third connecting seat. The multiple sets of fourth connecting seats are also arranged in a circular array. A synchronization ring is fixedly connected to the multiple sets of fourth connecting seats. The synchronization ring is slidably connected to the fixed rod.

[0009] Optionally, an internally threaded tube is fixedly connected to the side of the synchronizing ring away from the fourth connecting seat. The internally threaded tube is slidably connected to the fixed rod. An externally threaded tube is threaded onto the internally threaded tube. A positioning ring is provided at the end of the externally threaded tube away from the synchronizing ring. The positioning ring is fixedly connected to the outer ring of the fixed rod.

[0010] Optionally, a rotating block is fixedly connected to the outer ring of the external threaded pipe, and the rotating block is hexagonal in shape.

[0011] Optionally, the outer periphery of the fixing rod is provided with multiple sets of through holes opened on the fixing plate, and the multiple sets of through holes are distributed in a ring array, with the second support rod passing through the through holes.

[0012] Optionally, one end of the protective cylinder is closed, and the protective cylinder is sleeved on the outer ring of the fixed rod.

[0013] Optionally, the outer ring of the protective cylinder near the fixed plate is fixedly connected with multiple sets of locking plates. The outer side of the locking plate is slidably connected with a slot, the slot is fixedly connected to the fixed plate, and the side of the slot away from the fixed plate is fixedly connected with a through groove. The locking plate is slidably connected in the slot and slides into the slot through the through groove.

[0014] On the other hand, this aspect also proposes a construction method for a pipeline horizontal directional drilling joint connection construction device, including the following steps: Step 1: Determine the dimensions of the working pits for the horizontal directional drilling of the pipeline, including the length, width, and depth of the working pits. Step 2: When constructing the corresponding crossing pipe section for the buried pipe on the ground, connect 1 to 2 extra pipes at the end to ensure that after horizontal directional drilling and back-pulling of the pipe, 1 to 2 pipes remain on the ground to allow for the installation of the fixing components and the extension of the pipe; install the fixing components at the end of the buried pipe's inlet and outlet pipes away from the curved pipe, and put the protective sleeve on the outer ring of the fixing rod of the fixing components. Step 3: Perform horizontal directional drilling and back-pulling operation on the buried pipe with the pre-installed construction equipment. After the back-pulling is completed, place the buried pipe for more than 24 hours to allow the tensile stress generated during the crossing process to be fully released before connecting the two ends of the pipe. Step 4: Excavate a trench along the axis of the buried pipe from the working pit at the horizontal directional drilling end. Ensure that the inlet and outlet pipes and extension tubes of the buried pipe can be placed smoothly in the trench. During the trench excavation, use the excavator bucket to press down or place cement counterweights on the inlet and outlet pipes and extension tubes of the buried pipe to gradually increase the counterweight of the buried pipe. Utilize the weight of the buried pipe itself and the force of the external counterweight to make the buried pipe bend from the cold bending starting point. Step 5: For the horizontal directional drilling end, after the horizontal directional drilling rig is removed, extend one pipe along the axis of the buried pipe and in the direction of the pipe exiting the soil at the end of the inlet / outlet pipe away from the arc-shaped pipe. During the extension process, use the fixing rods and fixing plates of the fixing components to ensure the coaxiality of the extended pipe. Excavate a pipe trench from the working pit at the entry end along the axis of the buried pipe. The length of the pipe trench should be able to accommodate at least one pipe to reserve space for the bending and fixing of the buried pipe. Using the same counterweight method as in Step 4, gradually add counterweight to the inlet / outlet pipe, the extended pipe, and the extension cylinder of the buried pipe. Utilize the weight of the buried pipe itself and the added counterweight to make the buried pipe bend from the cold bending starting point. Then carry out backfilling operations, removing the added force while backfilling. Use the squeezing force of the backfill soil to fix the buried pipe firmly, ensuring that the horizontal pipe end of the buried pipe remains horizontal and can be properly aligned with the directly buried horizontal pipe. Step 6: After both ends of the buried horizontal pipe are adjusted to be horizontal, remove the protective sleeve, extension sleeve and fixing components, and weld the horizontal pipe to the directly buried horizontal pipe. After welding, inspect the weld to ensure that there are no defects and no stress concentration. Then, complete the backfilling of the remaining pipe trench, and compact the arc-shaped pipe and the area around the inlet and outlet pipes of the buried pipe to ensure the installation stability of the buried pipe. Complete the horizontal directional drilling joint connection construction of the entire pipeline.

[0015] Compared with the prior art, this application includes at least one of the following beneficial technical effects: This invention achieves stable fixing of the buried pipe end through components such as the support plate and rubber pad of the fixing component. Combined with the supporting effect of the extension tube, it can accurately adjust the horizontal pipe of the buried pipe to a horizontal state through the flexible laying and cold bending process of the pipeline without cutting the excess pipe section of the inlet and outlet pipe or adding elbows, thus achieving precise alignment with the directly buried horizontal pipe. Furthermore, by using components such as the synchronous ring and internal threaded pipe of the fixing component to drive multiple sets of support plates to be stressed synchronously, the buried pipe is fixed and stable. The protective sleeve effectively protects the structural integrity of the fixing component and avoids pipe displacement during construction, which can lead to misalignment. This fundamentally solves the problems of difficult alignment and stress concentration at weld joints in traditional construction, reduces the risk of pipe leakage and breakage, and ensures the long-term safe operation of the pipeline. Furthermore, the fastening and length extension of the buried pipe ends are achieved through components such as fixing plates and fixing rods of the fixing components. The protective cylinder is quickly assembled with the fixing plate through locking plates and slots, making it easy to assemble and disassemble and reducing auxiliary construction operations. There is no need to cut pipes or add elbows, which not only reduces pipe waste, but also saves unnecessary processes such as cutting and elbow installation, reducing the labor intensity of construction workers. At the same time, the precise control of the working pit size combined with the flexible pipe laying process avoids stress damage during pipe bending. The arc-shaped pipe achieves a smooth transition between horizontal pipes and inlet and outlet pipes, further improving the construction quality of pipe laying and joint connection, shortening the construction cycle, and adapting to a variety of complex construction scenarios. In summary, this invention enables precise alignment between horizontally directional drilling pipes and horizontal pipes, eliminates stress concentration at weld joints, eliminates the need to cut excess pipe sections and add elbows, simplifies construction procedures, reduces construction costs, and simultaneously improves pipe welding quality, structural stability, and flow performance, ensuring the long-term safety of the pipeline. Attached Figure Description

[0016] Figure 1 A schematic diagram of a construction device for connecting horizontal directional drilling joints in pipelines; Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure; Figure 3 This is a schematic diagram of the structure after the protective cylinder has been disassembled; Figure 4 for Figure 1 Enlarged view of point A in the middle; Figure 5 for Figure 2 Enlarged view of point B in the middle; Figure 6 for Figure 3 Enlarged diagram of point C in the middle. Attached Figure

[0017] 1. Buried pipe; 11. Horizontal pipe; 12. Curved pipe; 13. Inlet / outlet pipe; 2. Fixing assembly; 21. Fixing plate; 22. Fixing rod; 23. Fixing ring; 24. First connecting seat; 25. First support rod; 26. Second connecting seat; 27. Support plate; 28. Rubber pad; 29. ​​Third connecting seat; 210. Second support rod; 211. Fourth connecting seat; 212. Synchronizing ring; 213. Internally threaded tube; 214. Externally threaded tube; 215. Positioning ring; 216. Rotating block; 217. Through hole; 3. Protective sleeve; 31. Locking plate; 32. Slot; 33. Through slot; 4. Extended tube. Detailed Implementation

[0018] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other. Example

[0019] like Figure 1As shown, the present invention proposes a pipeline horizontal directional drilling joint connection construction device, including a buried pipe 1, which is the main load-bearing component of the entire construction device, used to realize the underground laying of the pipeline and connect the horizontal directional drilling pipeline and the directly buried horizontal pipeline. The buried pipe 1 includes a horizontal pipe 11, which is the core component of the device for horizontal connection, used to connect with the directly buried horizontal pipeline. The two ends of the horizontal pipe 11 are respectively fixedly connected with symmetrically arranged arc-shaped pipes 12. The arc-shaped pipes 12 are used to adapt to the inclination angle of the horizontal directional drilling entry point and exit point, realize the smooth transition between the horizontal pipe 11 and the inlet / outlet pipes 13, and avoid stress concentration due to pipe bending. The end of the arc-shaped pipe 12 away from the horizontal pipe 11 is fixedly connected to the inlet / outlet pipe 13. The inlet / outlet pipe 13 is used to connect the arc-shaped pipe 12 and the pipeline of the horizontal directional drilling construction, serving as a transition connection component for the pipeline entering and exiting the ground. The end of the inlet / outlet pipe 13 away from the arc-shaped pipe 12 is bent and connected to the horizontally arranged pipeline, realizing the precise connection between the inclined pipeline and the horizontal pipeline.

[0020] For further details, please refer to Figures 1 to 6 The aforementioned construction device includes fixing components 2 installed at both ends of the buried pipe 1. Fixing components 2 are fixed to the ends of the buried pipe 1 and are used to increase the length of both ends of the buried pipe 1 after it is drilled into the ground, facilitating the bending of both ends of the buried pipe 1 into a horizontal state to connect to directly buried pipelines. Its core function is to fix and extend the length of the ends of the buried pipe 1, providing support for subsequent pipe bending and connection. Fixing components 2 include a fixing plate 21 located at the end of the inlet / outlet pipe 13 away from the arc-shaped pipe 12. The fixing plate 21 is the basic load-bearing component of the fixing component 2, used to install the fixing rod 22 and limit the protective cylinder 3. The fixing rod 22 is fixedly connected to the fixing plate 21. The fixing rod 22 is the core support component of the fixing component 2, used to penetrate the inlet / outlet pipe 13 and provide sliding and installation references for components such as the synchronous ring 212 and the internally threaded pipe 213. The fixing plate 21 and the fixing rod 22 are designed as a single unit, enhancing the connection strength and preventing breakage under stress.

[0021] A fixing rod 22 passes through the inlet / outlet pipe 13, achieving initial connection between the fixing component 2 and the inlet / outlet pipe 13. A fixing ring 23 is fixedly sleeved on one end of the fixing rod 22 within the inlet / outlet pipe 13. The fixing ring 23 is used to install the first connecting seat 24, providing a rotational support point for the first support rod 25. Multiple sets of first connecting seats 24 are fixedly connected to the side of the fixing ring 23 near the fixing plate 21. The first connecting seats 24 connect the fixing ring 23 to the first support rod 25, enabling the rotational installation of the first support rod 25. The multiple sets of first connecting seats 24 are arranged in a circular array to ensure uniform force distribution on the multiple support plates 27. First support rods 25 are rotatably connected to both sides of the first connecting seat 24. The first support rods 25 are used to cooperate with the first... Two support rods 210 drive the support plate 27 to move radially. The ends of the two sets of first support rods 25 away from the first connecting seat 24 are rotatably connected to the second connecting seat 26. The second connecting seat 26 is used to connect the first support rods 25 and the support plate 27 and transmit the driving force of the support rods. The support plate 27 is fixedly connected to the second connecting seat 26. The support plate 27 is used to fit against the inner wall of the inlet / outlet pipe 13. The fixing component 2 and the inlet / outlet pipe 13 are fastened by compression. A rubber pad 28 is installed on the side of the support plate 27 away from the second connecting seat 26. The rubber pad 28 is used to increase the friction between the support plate 27 and the inner wall of the inlet / outlet pipe 13 to prevent the fixing component 2 from sliding off and to avoid the support plate 27 from scratching the inner wall of the inlet / outlet pipe 13.

[0022] A third connecting seat 29 is fixedly connected to the side of the support plate 27 away from the rubber pad 28. The third connecting seat 29 is used to connect the support plate 27 and the second support rod 210, providing a rotation support point for the second support rod 210. The second support rod 210 is rotatably connected to both sides of the third connecting seat 29. The second support rod 210 cooperates with the first support rod 25 to realize the radial extension and retraction adjustment of the support plate 27. A fourth connecting seat 211 is rotatably connected to the end of the two sets of second support rods 210 away from the third connecting seat 29. The fourth connecting seat 211 is used to connect the second support rod 210 and the synchronous ring 212, converting the axial movement of the synchronous ring 212 into support. The radial driving force of the rod, with multiple sets of fourth connecting seats 211 also arranged in a circular array, ensures that multiple sets of support plates 27 move synchronously. Multiple sets of fourth connecting seats 211 are all fixedly connected to a synchronous ring 212, which drives the multiple sets of fourth connecting seats 211 to move synchronously, achieving synchronous linkage of multiple support rods. The synchronous ring 212 is slidably connected to the fixed rod 22. When the synchronous ring 212 moves, it drives the multiple sets of fourth connecting seats 211 to move synchronously, thereby causing the first support rod 25 and the second support rod 210 to shift, supporting the support plate 27 and causing the support plate 27 to press against the inner wall of the inlet / outlet pipe 13, thus limiting the position of the fixed assembly 2. Rubber pads 28 increase friction and prevent slippage.

[0023] An internally threaded tube 213 is fixedly connected to the side of the synchronizing ring 212 away from the fourth connecting seat 211. The internally threaded tube 213 is used to cooperate with the externally threaded tube 214, converting the rotation of the externally threaded tube 214 into its own axial movement, thereby driving the synchronizing ring 212 to move. The internally threaded tube 213 is slidably connected to the fixed rod 22, and the internally threaded tube 213 and the synchronizing ring 212 move synchronously to ensure the consistency of driving force transmission. An externally threaded tube 214 is threadedly connected to the internally threaded tube 213. The externally threaded tube 214 is a power transmission component. By rotating, it drives the internally threaded tube 213 to move axially. When the externally threaded tube 214 rotates, the internally threaded tube 213 moves in the opposite direction to the externally threaded tube 214, realizing the extension and retraction adjustment of the internally threaded tube 213.

[0024] A positioning ring 215 is provided at the end of the external threaded tube 214 away from the synchronizing ring 212. The positioning ring 215 is used to limit the external threaded tube 214 and fix its axial position, allowing it to rotate only around the fixing rod 22. The positioning ring 215 is fixedly connected to the outer ring of the fixing rod 22. The position of the positioning ring 215 is fixed, so when the external threaded tube 214 rotates, it can drive the internal threaded tube 213 away from the positioning ring 215, and drive the synchronizing ring 212 away from the positioning ring 215, thereby causing the first support rod 25 and the second support rod 210 to shift. A rotating block 216 is fixedly connected to the outer ring of the external threaded tube 214. The rotating block 216 is a force-applying component, used to facilitate the operator to rotate the external threaded tube 214 with a wrench, reducing the difficulty of operation. The rotating block 216 is hexagonal and compatible with common wrench models. The setting of the rotating block 216 makes it easy to rotate the external threaded tube 214 with a wrench.

[0025] The outer periphery of the fixing rod 22 is provided with multiple sets of through holes 217 opened on the fixing plate 21. The through holes 217 are used to pass through the second support rod 210 and at the same time limit the internal thread tube 213 to prevent the internal thread tube 213 from rotating synchronously with the external thread tube 214, so as to ensure that the internal thread tube 213 only moves axially. The multiple sets of through holes 217 are arranged in a ring array, corresponding to the distribution position of the second support rod 210. The second support rod 210 passes through the through holes 217. Through the arrangement of the through holes 217 and the second support rod 210, it is prevented that the external thread tube 214 will drive the internal thread tube 213 to rotate synchronously when it rotates.

[0026] Furthermore, such as Figures 3 to 6As shown, the above-mentioned construction device includes a protective cylinder 3 fitted onto the fixed component 2. The protective cylinder 3 protects the structure of the fixed component 2, preventing it from being squeezed and worn by the soil during pipeline drilling, thus ensuring the structural integrity and operational stability of the fixed component 2. An extension cylinder 4 is fixedly connected to the end of the protective cylinder 3 away from the fixed component 2. The extension cylinder 4 extends the protection range and is also adapted for the installation of extension pipes for bending, providing support for pipe bend connections. Extension pipes for bending are fitted onto the extension cylinder 4 to facilitate subsequent pipe bending and connection. One end of the protective cylinder 3 is closed to prevent soil impurities from entering the interior of the protective cylinder 3. The protective cylinder 3 is fitted around the outer ring of the fixed rod 22, protecting its internal structure.

[0027] Multiple sets of locking pieces 31 are fixedly connected to the outer ring of the protective cylinder 3 near the fixing plate 21. The locking pieces 31 are used to cooperate with the slots 32 to achieve detachable fixation between the protective cylinder 3 and the fixing plate 21. The slots 32 are slidably connected to the outer side of the locking pieces 31. The slots 32 are used to limit the locking pieces 31 and fix the position of the protective cylinder 3. The slots 32 are fixedly connected to the fixing plate 21 to ensure the installation stability of the slots 32. A through groove 33 is fixedly connected to the side of the slots 32 away from the fixing plate 21. The through groove 33 is used to guide the locking pieces 31 to slide into the slots 32 and at the same time restrict the sliding direction of the locking pieces 31 to prevent the locking pieces 31 from falling out of the slots 32. The locking pieces 31 are slidably connected in the slots 32. The locking pieces 31 slide into the slots 32 through the through grooves 33. After passing through the through grooves 33, the locking pieces 31 enter the slots 32 to prevent the locking pieces 31 from falling out of the slots 32, thereby preventing the protective cylinder 3 from moving away from the fixing plate 21, ensuring the stability of the position of the protective cylinder 3 and preventing it from falling out.

[0028] In this embodiment, a construction method for a pipeline horizontal directional drilling joint connection construction device includes the following steps: Step 1: Determine the dimensions of the working pits for the horizontal directional drilling entry and exit points of the pipeline. The length of the working pit should be greater than the horizontal distance from the end of the inlet / outlet pipe 13 of the buried pipe 1 to the starting point of the cold bending of the pipeline, ensuring that the fixing plate 21 and fixing rod 22 of the fixing component 2 can be smoothly installed at the end of the inlet / outlet pipe 13, and reserving space for pipeline cold bending operations. The width of the working pit is determined based on the horizontal directional drilling tools, the amount of mud used, and the trench excavation width corresponding to the buried pipe 1, ensuring that operators can smoothly perform the debugging of the fixing component 2, the installation of the protective sleeve 3, and the pipeline counterweight operation. The depth of the working pit is ≥ the laying depth of the buried pipe 1 + the height of the pipeline cold bending elbow. Among them, the bending radius of the cold bending elbow of the steel buried pipe 1 is ≥40D, and the bending angle within every 300mm is not greater than 1°, ensuring a smooth transition between the curved pipe 12 of the buried pipe 1 and the inlet / outlet pipe 13, and avoiding stress concentration.

[0029] Step 2: When constructing the corresponding crossing pipe section for the buried pipe 1 on the ground, connect 1 to 2 extra pipes at the end to ensure that after horizontal directional drilling and pipe pulling back, 1 to 2 pipes remain on the ground, providing slack for the installation of the fixing component 2 and pipe extension. Install the fixing component 2 at the end of the inlet / outlet pipe 13 of the buried pipe 1 away from the arc-shaped pipe 12. Insert the fixing rod 22 into the inlet / outlet pipe 13, so that the fixing ring 23 on the fixing rod 22 is located inside the inlet / outlet pipe 13. Rotate the rotating block 216 to drive the external threaded pipe 214 to rotate. Since the positioning ring 215 is fixed to the outer ring of the fixing rod 22, when the external threaded pipe 214 rotates, it drives the internal threaded pipe 213 away from the positioning ring 215 along the axial direction of the fixing rod 22, thereby driving the synchronous ring 212 to move synchronously. When the synchronous ring 212 moves, it drives the second support rod 210 to shift through the fourth connecting seat 211. The second support rod 210 drives the support plate 27 to move towards the inner wall of the inlet / outlet pipe 13 through the third connecting seat 29. At the same time, the first support rod 25 moves with the support plate 27 through the first connecting seat 24 and the second connecting seat 26 until the rubber pad 28 on the support plate 27 is tightly attached to the inner wall of the inlet / outlet pipe 13, thus completing the fixation of the fixing component 2 and the inlet / outlet pipe 13. At this time, the through hole 217 plays a limiting role for the second support rod 210, preventing the internal threaded pipe 213 from rotating synchronously with the external threaded pipe 214. The protective cylinder 3 is sleeved on the outer ring of the fixing rod 22 of the fixing component 2, so that the locking piece 31 on the protective cylinder 3 slides into the slot 32 through the through groove 33. The slot 32 is fixedly connected to the fixing plate 21, preventing the locking piece 31 from disengaging from the slot 32, thereby ensuring the stability of the position of the protective cylinder 3. The protective cylinder 3 protects the various components of the fixing component 2, preventing them from being squeezed and worn by the soil during subsequent excavation and backfilling. The extension tube 4 is then fixedly connected to the end of the protective tube 3 away from the fixing component 2, and an extension tube for bending is fitted onto the extension tube 4 to provide support for subsequent cold bending and connection of the pipe.

[0030] Step 3: Perform horizontal directional drilling and back-pulling operation on the buried pipe 1 with the pre-installed construction device. After the back-pulling is completed, place the buried pipe 1 for more than 24 hours to allow the tensile stress generated during the crossing process to be fully released before connecting the two ends of the pipe. This is to avoid stress residue causing stress concentration at the weld joint during subsequent butt welding, which would affect the welding quality and the safety of the buried pipe 1.

[0031] Step 4: Excavate a trench along the axis of the buried pipe 1 from the working pit at the horizontal directional drilling end. The trench should be long enough to accommodate at least two pipes to ensure that the inlet / outlet pipe 13 and extension cylinder 4 of the buried pipe 1 can be smoothly placed in the trench. During the trench excavation, gradually increase the weight of the buried pipe 1 by pressing it with an excavator bucket or by placing cement counterweights on the inlet / outlet pipe 13 and extension cylinder 4. Utilize the weight of the buried pipe 1 itself and the force of the added counterweight to make the buried pipe 1 bend from the cold bending starting point, causing the inlet / outlet pipe 13 to deform. This will gradually make the horizontal pipe 11 of the buried pipe 1 fit tightly against the bottom of the trench. At this time, the arc-shaped pipe 12 plays a smooth transition role, avoiding stress concentration at the bend of the buried pipe 1. After the buried pipe 1 is completely placed at the bottom of the trench, backfilling begins. During the backfilling process, the external force on the buried pipe 1 is gradually removed while backfilling. The pressure of the backfill sand and soil is used to fix the buried pipe 1 firmly, ensuring that the end of the horizontal pipe 11 of the buried pipe 1 remains horizontal, so as to facilitate normal alignment with the directly buried horizontal pipe. At this time, the support plate 27 of the fixing component 2 further enhances the friction with the inlet and outlet pipes 13 through the rubber pad 28 to prevent the buried pipe 1 from shifting. The protective cylinder 3 continues to protect the fixing component 2.

[0032] Step 5: For the horizontally oriented drilling end, after the horizontally oriented drilling rig is removed, extend one pipe along the axial direction of the buried pipe 1, in the direction of the pipe exiting the soil, at the end of the inlet / outlet pipe 13 away from the arc-shaped pipe 12. During the extension process, the fixing rod 22 and fixing plate 21 of the fixing component 2 are used to ensure the coaxiality of the extended pipe. Excavate a pipe trench from the working pit at the entry end along the axial direction of the buried pipe 1. The length of the pipe trench should be able to accommodate at least one pipe, reserving space for the bending and fixing of the buried pipe 1. Using the same counterweight method as in Step 4, gradually add counterweight to the inlet / outlet pipe 13, the extended pipe, and the extension cylinder 4 of the buried pipe 1. Utilize the elastic laying of the buried pipe 1 by its own weight and the added counterweight to make the buried pipe 1 bend from the cold bending starting point, causing the arc-shaped pipe 12 and the inlet / outlet pipe 13 to deform smoothly and synchronously until the buried pipe 1 is completely and tightly attached to the bottom of the pipe trench. Then backfilling is carried out. While backfilling, the external force is removed. The pressure of the backfill soil is used to fix the buried pipe 1 firmly, ensuring that the end of the horizontal pipe 11 of the buried pipe 1 remains horizontal and can be properly aligned with the directly buried horizontal pipe.

[0033] Step 6: After both ends of the horizontal pipe 11 of the buried pipe 1 are adjusted to a horizontal state, remove the protective sleeve 3, the extension sleeve 4, and the fixing component 2. Butt weld the horizontal pipe 11 to the directly buried horizontal pipe. After welding, inspect the weld joint to ensure that there are no defects or stress concentrations. Then, complete the backfilling of the remaining pipe trench, and compact the area around the arc-shaped pipe 12 and the inlet / outlet pipe 13 of the buried pipe 1 to ensure the installation stability of the buried pipe 1. The entire horizontal directional drilling joint connection construction of the pipeline is completed.

[0034] The above specific embodiments are merely optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A pipeline horizontal directional drilling joint connection construction device, characterized in that, include: Buried pipe (1); The fixing components (2) installed at both ends of the buried pipe (1) are fixed to the ends of the buried pipe (1) and are used to increase the length of both ends of the buried pipe (1) after the buried pipe (1) is drilled into the ground, so that the ends of the buried pipe (1) can be bent into a horizontal state to connect the directly buried pipe. A protective sleeve (3) is installed on the fixing component (2). The protective sleeve (3) is used to protect the structure of the fixing component (2). An extension sleeve (4) is fixedly connected to the end of the protective sleeve (3) away from the fixing component (2). An extension tube for bending is sleeved on the extension sleeve (4).

2. The pipeline horizontal directional drilling joint connection construction device according to claim 1, characterized in that, The buried pipe (1) includes a horizontal pipe (11), and two ends of the horizontal pipe (11) are respectively fixedly connected to symmetrically arranged arc-shaped pipes (12). The end of the arc-shaped pipe (12) away from the horizontal pipe (11) is fixedly connected to an inlet pipe (13).

3. The pipeline horizontal directional drilling joint connection construction device according to claim 2, characterized in that, The fixing component (2) includes a fixing plate (21) disposed at the end of the inlet / outlet pipe (13) away from the arc-shaped pipe (12). A fixing rod (22) is fixedly connected in the fixing plate (21). The fixing rod (22) passes through the inlet / outlet pipe (13). A fixing ring (23) is fixedly sleeved at one end of the fixing rod (22) located in the inlet / outlet pipe (13). Multiple sets of first connecting seats (24) are fixedly connected to the side of the fixing ring (23) near the fixing plate (21). The multiple sets of first connecting seats (24) are arranged in a ring array. First support rods (25) are rotatably connected to both sides of the first connecting seats (24). Second connecting seats (26) are rotatably connected to the ends of the two sets of first support rods (25) away from the first connecting seats (24). A support plate (27) is fixedly connected to the second connecting seat (26). A rubber pad (28) is installed on the side of the support plate (27) away from the second connecting seat (26).

4. The pipeline horizontal directional drilling joint connection construction device according to claim 3, characterized in that, The support plate (27) is also fixedly connected to a third connecting seat (29) on the side away from the rubber pad (28). The second support rod (210) is rotatably connected to both sides of the third connecting seat (29). The ends of the two sets of second support rods (210) away from the third connecting seat (29) are rotatably connected to a fourth connecting seat (211). The multiple sets of fourth connecting seats (211) are also arranged in a ring array. The multiple sets of fourth connecting seats (211) are fixedly connected to a synchronization ring (212). The synchronization ring (212) is slidably connected to the fixed rod (22).

5. A pipeline horizontal directional drilling joint connection construction device according to claim 4, characterized in that, The synchronization ring (212) is fixedly connected to an internal threaded tube (213) on the side away from the fourth connecting seat (211). The internal threaded tube (213) is slidably connected to the fixed rod (22). An external threaded tube (214) is threadedly connected to the internal threaded tube (213). A positioning ring (215) is provided at the end of the external threaded tube (214) away from the synchronization ring (212). The positioning ring (215) is fixedly connected to the outer ring of the fixed rod (22).

6. A pipeline horizontal directional drilling joint connection construction device according to claim 5, characterized in that, The outer ring of the external threaded pipe (214) is fixedly connected to a rotating block (216), which is hexagonal in shape.

7. A pipeline horizontal directional drilling joint connection construction device according to claim 6, characterized in that, The fixing rod (22) has multiple sets of through holes (217) on the fixing plate (21) on its outer periphery. The multiple sets of through holes (217) are arranged in a ring array. The second support rod (210) passes through the through holes (217).

8. A pipeline horizontal directional drilling joint connection construction device according to claim 7, characterized in that, One end of the protective cylinder (3) is closed, and the protective cylinder (3) is sleeved on the outer ring of the fixed rod (22).

9. A pipeline horizontal directional drilling joint connection construction device according to claim 8, characterized in that, The protective cylinder (3) has multiple sets of locking pieces (31) fixedly connected to the outer ring of the end near the fixing plate (21). The locking piece (31) has a slot (32) slidably connected to the outside of the slot (31). The slot (32) is fixedly connected to the fixing plate (21). The slot (32) has a through groove (33) fixedly connected to the side away from the fixing plate (21). The locking piece (31) is slidably connected in the slot (32). The locking piece (31) slides into the slot (32) through the through groove (33).

10. A construction method for a pipeline horizontal directional drilling joint connection construction device according to claim 9, characterized in that, Includes the following steps: Step 1: Determine the dimensions of the working pits for the horizontal directional drilling of the pipeline, including the length, width, and depth of the working pits. Step 2: When making the corresponding crossing pipe section of the buried pipe (1) on the ground, connect 1 to 2 more pipes at the end to ensure that after the horizontal directional drilling back to pull the pipe, there are 1 to 2 pipes left on the ground to reserve the margin for the installation of the fixing component (2) and the pipe extension; install the fixing component (2) at the end of the inlet and outlet pipe (13) of the buried pipe (1) away from the arc pipe (12), and put the protective cylinder (3) on the outer ring of the fixing rod (22) of the fixing component (2); Step 3: The buried pipe (1) with the pre-installed construction device is horizontally directionally drilled and pulled back. After the pull-back is completed, the buried pipe (1) is placed for more than 24 hours. After the tensile stress generated by the buried pipe (1) during the crossing process is fully released, the connection operation of the two ends of the pipe is carried out. Step 4: Excavate a trench along the axis of the buried pipe (1) from the working pit at the horizontal directional drilling end. Ensure that the inlet and outlet pipes (13) and extension cylinder (4) of the buried pipe (1) can be placed smoothly in the trench. During the trench excavation, use the excavator bucket to press or place cement counterweights on the inlet and outlet pipes (13) and extension cylinder (4) of the buried pipe (1) to gradually increase the counterweight of the buried pipe (1). Utilize the weight of the buried pipe (1) itself and the force of the added counterweight to make the buried pipe (1) bend from the cold bending starting point. Step 5: For the horizontal directional drilling end, after the horizontal directional drilling rig is removed, extend one pipe along the axial direction of the buried pipe (1) and in the direction of the pipe exiting the soil at the end of the inlet / outlet pipe (13) away from the arc-shaped pipe (12). During the extension process, use the fixing rod (22) and fixing plate (21) of the fixing component (2) to ensure the coaxiality of the extended pipe. Excavate a pipe trench from the working pit at the entry end along the axial direction of the buried pipe (1). The length of the pipe trench should be able to accommodate at least one pipe, leaving room for the bending and fixing of the buried pipe (1). Space; Using the same counterweight method as in step 4, gradually increase the counterweight on the inlet and outlet pipes (13), extension pipes and extension cylinders (4) of the buried pipe (1). Utilize the weight of the buried pipe (1) itself and the added counterweight to make the buried pipe (1) bend from the cold bending starting point. Then carry out backfilling operations. While backfilling, remove the added force. Utilize the squeezing force of the backfill soil to fix the buried pipe (1) firmly, ensuring that the end of the horizontal pipe (11) of the buried pipe (1) remains horizontal and can be properly aligned with the horizontal pipe laid directly underground. Step 6: After both ends of the horizontal pipe (11) of the buried pipe (1) are adjusted to a horizontal state, remove the protective cylinder (3), the extension cylinder (4) and the fixing component (2), and weld the horizontal pipe (11) to the directly buried horizontal pipe. After the welding is completed, inspect the weld joint to ensure that there are no defects or stress concentrations. Then, complete the backfilling of the remaining pipe trench, and compact the area around the arc pipe (12) and the inlet and outlet pipe (13) of the buried pipe (1) to ensure the installation stability of the buried pipe (1) and complete the horizontal directional drilling joint connection construction of the entire pipeline.

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