A spin-cutting type pipe replacement system for short pipe replacement

Abstract

The application relates to the technical field of pipe replacement by the pipe cracking method, in particular to a self-rotating cutting type pipe replacement system for short pipe replacement. The pipe replacement system comprises a pipe cracking head, a driving mechanism, a pushing mechanism and a guiding mechanism. The head of the pipe cracking head is conical, and a spiral blade is arranged on the outer periphery of the head of the pipe cracking head. The driving mechanism is used for driving the pipe cracking head to rotate. One end of a pipe connector is rotationally connected with the tail of the pipe cracking head, and the other end of the pipe connector is used for connecting a new pipe. The pushing mechanism is connected with one end of the new pipe which is away from the pipe cracking head, and is used for pushing the new pipe to move forward along the original pipe. The guiding mechanism is installed between the driving mechanism and the pipe cracking head, is used for transmitting the torque of the motor to the pipe cracking head, and allows the pipe cracking head and the motor to axially move along the direction of the motor output shaft axis. The pipe replacement system can reduce or even avoid the pipe cracking head blockage caused by pipe sticking, insufficient forward movement of the new pipe and the like, and improves the pipe replacement efficiency.

Description

Technical Field

[0001] This application relates to the field of pipe replacement technology using the pipe cracking method, and more specifically, to a spin-cutting pipe replacement system for short pipe replacement. Background Technology

[0002] Currently, in the field of trenchless pipeline repair technology, short-pipe replacement is a commonly used pipeline replacement method. It achieves rapid pipeline replacement by squeezing and rupturing the original pipeline and inserting a new one. This method eliminates the need for large-scale ground excavation, effectively reducing construction disruptions to surface traffic, minimizing the impact on the stability of surrounding buildings, and minimizing disruption to residents' daily lives. It is widely used in urban underground pipeline maintenance projects.

[0003] In existing short pipe replacement construction processes, straight-blade rupture heads are commonly used as the demolition tool. These rupture heads have a simple structure, relying solely on axial thrust to drive the straight blades for cutting and crushing when rupturing the original pipe. However, when encountering tree roots, hard foreign objects, or other obstacles during construction, the straight-blade rupture head lacks the ability to break up and avoid these obstacles. Operators can only attempt to forcibly remove the obstacle and continue work by increasing the jacking force behind it. However, the continuously increasing jacking force can easily cause compression deformation, rupture, and other damage to the newly laid pipe. To avoid damage to the new pipe, construction workers often need to take measures such as excavation, i.e., partially excavating to expose the construction area, manually clearing obstacles, or replacing the rupture head.

[0004] However, opening the trench not only increases construction costs and time but also disrupts the integrity of trenchless construction, contradicting the original intention of trenchless technology to reduce environmental impact. Furthermore, in some special construction scenarios (such as busy traffic areas, densely built-up areas, and areas with high groundwater levels), site limitations or safety requirements often make it difficult to meet the conditions for opening the trench for pipe replacement, leading to forced construction interruptions and even requiring a complete redesign of the construction plan, severely impacting project progress and economic benefits. Therefore, there is an urgent need to develop a pipe replacement device that can effectively address construction obstacles and avoid opening the trench, thereby improving the reliability and applicability of trenchless short pipe replacement technology. Utility Model Content

[0005] In view of this, this application provides a spin-cutting pipe replacement system for short pipe replacement, which aims to improve the problem that existing pipe replacement systems lack the ability to break and avoid obstacles.

[0006] This application provides a spin-cutting pipe replacement system for short pipe replacement, comprising:

[0007] The pipe-cracking head has a conical head and a spiral blade on the outer periphery of the head.

[0008] A drive mechanism is used to drive the tube-breaking machine head to rotate;

[0009] A pipe connector, one end of which is rotatably connected to the tail end of the pipe-breaking machine head, and the other end of which is used to connect a new pipe; and

[0010] A propulsion mechanism is connected to the end of the new pipeline away from the pipe-breaking head, and is used to propel the new pipeline forward along the original pipeline;

[0011] A guiding mechanism, installed between the drive mechanism and the pipe cracking head, is used to transmit the torque of the motor to the pipe cracking head and allow the pipe cracking head and the motor to move axially relative to each other along the direction of the motor output shaft axis.

[0012] Preferably, the drive mechanism is disposed in the receiving well, and the drive mechanism includes a mounting base and a motor mounted on the mounting base;

[0013] The guiding mechanism includes a spline coupling and a first transmission tube. The external spline and internal spline of the spline coupling are clearance-fitted. The first transmission tube is connected to the head of the pipe splitting machine head.

[0014] One of the motor's output shaft and the first transmission tube is connected to the external spline of the spline coupling, and the other is connected to the internal spline of the spline coupling.

[0015] Preferably, the transmission assembly includes a driving gear and a driven gear, the output shaft of the motor is connected to the driving gear, and the driving gear cooperates with the driven gear;

[0016] The guiding mechanism further includes a second transmission tube, the driven gear is connected to the second transmission tube, one of the second transmission tube and the first transmission tube is connected to the external spline of the spline coupling, and the other is connected to the internal spline of the spline coupling.

[0017] Preferably, the transmission assembly further includes an assembly fitting;

[0018] The second transmission tube is provided with a radial connecting through hole, and the driven gear is provided with a radial mounting through hole;

[0019] The assembly includes a mounting nut, a socket pin, and a rotating wheel. The rotating wheel is coaxial with the driven gear and located outside the driven gear. The rotating wheel has a radial mounting through hole. The socket pin passes through the mounting through hole, the mounting through hole, and the connecting through hole. The mounting nut is threaded to the socket pin, and the end face of the mounting nut abuts against the outer side of the rotating wheel.

[0020] Preferably, the pushing mechanism includes a pushing device and a hydraulic power unit located in the working well, the hydraulic power unit pushing the new pipeline through the pushing device.

[0021] Preferably, the pushing device is a jack, and the hydraulic power device is a hydraulic pump;

[0022] A pad is provided between the end face of the new pipe away from the pipe-cracking head and the piston rod end of the jack.

[0023] Preferably, the pipe connector includes a connecting sleeve, which is connected to the tail end of the pipe-breaking machine head via a rotating bearing;

[0024] The connecting sleeve is used to connect to the new pipeline.

[0025] Preferably, the pipe connector further includes a connecting sleeve, one end of which is fixedly connected to the connector sleeve via a detachable connector, and the other end of which is used to connect to a new pipe.

[0026] Compared with the prior art, the spin-cutting pipe replacement system for short pipe replacement provided in this application achieves at least the following beneficial effects:

[0027] In the pipe replacement system provided in this application, the pushing mechanism can propel the new pipe forward along the original pipe. The new pipe can transmit the thrust applied by the pushing mechanism to the pipe-cracking head, thereby driving the pipe-cracking head and the new pipe forward together, realizing the mobile laying of the new pipe. The pipe connector is connected to the tail of the pipe-cracking head. Thus, when the drive mechanism drives the pipe-cracking mechanism to rotate, the new pipe does not rotate, thereby ensuring that the movement of the drive mechanism and the pushing mechanism driving the pipe-cracking head are separated and will not interfere with the laying of the new pipe. The drive mechanism can drive the pipe-cracking head to rotate. The head of the pipe-cracking head is conical and has spiral blades on its outer periphery. The spiral blades can squeeze and break up clumps of soil or other obstacles that hinder the movement of the pipe-cracking head, and can also transport the broken material to the surrounding area of ​​the head, thereby reducing the resistance to the movement of the pipe-cracking head, realizing the smooth progress of trenchless pipe replacement, reducing or even avoiding the occurrence of pipe jamming and insufficient forward movement of the new pipe due to blockage of the pipe-cracking head during construction, and improving the efficiency of pipe replacement.

[0028] Of course, any product implementing this application need not specifically need to achieve all of the technical effects described above at the same time.

[0029] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0031] Figure 1 The diagram shown is a schematic diagram of the spin-cutting pipe replacement system for short pipe replacement provided in this application embodiment under operating conditions;

[0032] Figure 2 The diagram shown is a structural schematic of the drive mechanism in an embodiment of this application;

[0033] Figure 3 The diagram shown is a partial structural schematic of the transmission assembly in an embodiment of this application;

[0034] Figure 4 The diagram shown is a schematic diagram of the connection structure between the second transmission tube and the driven gear in an embodiment of this application;

[0035] Figure 5 The diagram shown is a front view of the connection structure between the pipe bursting head and the pipe connector in an embodiment of this application.

[0036] Figure 6 The diagram shown is a cross-sectional connection diagram of the pipe splitting head and the pipe connector in an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 10-New pipe, 20-Original pipe, 30-Receiving well, 40-Working well, 100-Pipe cracking head, 110-Helical blade, 200-Drive mechanism, 210-Mounting base, 220-Motor, 300-Pipe connector, 310-Connecting sleeve, 320-Rotating bearing, 320-Connecting sleeve, 410-Pushing device, 411-Jack, 420-Hydraulic power unit, 421-Hydraulic pump, 430-Pad, 500-Guide mechanism, 510-Spline coupling, 520-First transmission pipe, 530-Second transmission pipe, 531-Connecting through hole, 600-Transmission assembly, 610-Driving gear, 620-Passive gear, 630-Second transmission pipe, 640-Assembly parts, 641-Mounting nut, 642-Socket pin, 643-Rotator, 6431-Assembly through hole. Detailed Implementation

[0039] Various exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application.

[0040] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0041] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0042] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0043] Various modifications and variations can be made to this application without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, this application is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the implementation methods provided in the embodiments of this application can be combined with each other without contradiction.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0045] Figure 1 The diagram shown is a schematic representation of the spin-cutting pipe replacement system for short pipe replacement provided in this application embodiment, in its operational state. Figure 2 The diagram shown is a structural schematic of the drive mechanism in an embodiment of this application.

[0046] Please refer to Figure 1 and Figure 2 This application provides a spin-cutting pipe replacement system for short pipe replacement, including a pipe-cracking head 100, a drive mechanism 200, a pipe connector 300, and a pushing mechanism.

[0047] The head of the tube splitting head 100 is conical, and a spiral blade 110 is provided on the outer periphery of the head.

[0048] The drive mechanism 200 is used to drive the tube-breaking head 100 to rotate;

[0049] The pipe connector 300 is rotatably connected to the tail of the pipe bursting head 100, and the pipe connector 300 is used to connect the new pipe 10;

[0050] The driving mechanism is connected to the end of the new pipeline 10 away from the pipe-breaking head 100, and is used to push the new pipeline 10 forward along the original pipeline 20;

[0051] A guide mechanism 500 is installed between the drive mechanism 200 and the pipe-breaking head 100 to transmit the torque of the drive mechanism 200 to the pipe-breaking head 100 and to allow the pipe-breaking head 100 and the drive mechanism 200 to move relative to each other along the axial direction of the original pipe 20.

[0052] It should be understood that the head of the pipe-breaking head 100 is designed in a conical shape. This streamlined structure effectively reduces resistance when traveling within the original pipe 20. Spiral blades 110 are evenly distributed around the outer circumference of the head. These spiral blades 110 are made of high-strength, wear-resistant alloy steel and undergo a special heat treatment process, resulting in high hardness and extremely strong cutting capabilities. The pitch and helical angle of the spiral blades 110 are precisely calculated to ensure that sufficient breaking force is generated when breaking the original pipe 20 and obstacles, while also allowing the broken material to be smoothly discharged outwards along the spiral direction.

[0053] The drive mechanism 200 and the push mechanism can use one or more power methods, such as electric, hydraulic, and pneumatic, to drive the pipe cracking head 100 to rotate. This application embodiment does not limit this. In specific implementation, the drive mechanism 200 can also have a stepless speed regulation function, which can flexibly adjust the rotation speed of the pipe cracking head 100 according to different pipe materials and blockage conditions.

[0054] In use, the pipe-cracking head 100 and the new pipe 10 are connected via the pipe connector 300. Then, the pipe-cracking head 100 is placed inside the original pipe 20. The pushing mechanism is connected to the end of the new pipe 10 opposite to the pipe-cracking head 100. The pushing mechanism is activated, propelling the new pipe 10 forward along the original pipe 20. Simultaneously, because the guide mechanism 500 allows the pipe-cracking head 100 and the drive mechanism 200 to move relative to each other along the axis of the original pipe 20, the moving new pipe 10 drives the pipe-cracking head 100 forward synchronously. When the pipe-cracking head 100 encounters an obstacle within the original pipe 20, the drive mechanism is activated... The torque of the driving mechanism 200 is transmitted to the pipe-cracking head 100 via the guide mechanism 500. The pipe-cracking head 100 rotates, and the spiral blades 110 of the conical head squeeze and crush the obstacles and the original pipe 20. The crushed material spreads outward along the spiral blades 110, thereby reducing the forward resistance. The driving mechanism 200 is stopped, and the pushing mechanism is restarted to push the new pipe 10 and the pipe-cracking head 100 forward. The above process is repeated, and the starting and stopping of the driving mechanism 200 is repeated according to the construction requirements until the new pipe 10 is pushed into place, completing the replacement of the original pipe 20.

[0055] In the spin-cutting pipe replacement system for short pipe replacement provided in this embodiment, the pushing mechanism can push the new pipe 10 forward along the original pipe 20. The new pipe 10 can transmit the thrust applied by the pushing mechanism to the pipe-breaking head 100, thereby driving the pipe-breaking head 100 and the new pipe 10 forward together, realizing the mobile laying of the new pipe 10. The pipe connector 300 is connected to the tail of the pipe-breaking head 100. In this way, when the driving mechanism 200 drives the pipe-breaking mechanism to rotate, the new pipe 10 does not rotate, thus ensuring that the movements of the driving mechanism 200 and the pushing mechanism driving the pipe-breaking head 100 are separated and do not... Interference with the laying of the new pipeline 10; the drive mechanism 200 can drive the pipe-cracking head 100 to rotate. The head of the pipe-cracking head 100 is conical and has spiral blades 110 on its outer periphery. The spiral blades 110 can squeeze and crush lumpy soil or other obstacles that hinder the movement of the pipe-cracking head 100, and can transport the crushed material to the outside of the head, thereby reducing the resistance to the movement of the pipe-cracking head 100, enabling the trenchless pipeline replacement to proceed smoothly, reducing or even avoiding the occurrence of pipe jamming and insufficient forward movement of the new pipeline 10 due to blockage of the pipe-cracking head 100 during construction, and improving the efficiency of pipeline replacement.

[0056] See also Figure 1 and Figure 2 In some embodiments, the drive mechanism 200 is disposed in the receiving well 30. The drive mechanism 200 includes a mounting base 210 and a motor 220 mounted on the mounting base 210. The guide mechanism 500 includes a spline coupling 510 and a first transmission tube 520. The external spline and internal spline of the spline coupling 510 are clearance-fitted. The first transmission tube 520 is connected to the head of the pipe-breaking machine head 100. One of the output shaft of the motor 220 and the first transmission tube is connected to the external spline of the spline coupling 510, and the other is connected to the internal spline of the spline coupling 510.

[0057] It should be understood that the external spline and internal spline of the spline coupling 510 adopt a clearance fit. The spline coupling 510 transmits the torque output by the motor 220 through tooth surface meshing. Because the pipe-breaking head 100 needs to move axially synchronously when the pushing mechanism pushes the new pipe 10 forward, the clearance fit of the spline coupling 510 allows the motor 220 to remain in a fixed position (located inside the receiving well 30), while the pipe-breaking head 100 moves axially with the new pipe 10, avoiding the complexity caused by the overall movement of the drive mechanism 200 (such as cable dragging and increased difficulty in installation and positioning), and simplifying the construction process.

[0058] In this embodiment, the output shaft of the motor 220 is connected to the first transmission pipe 520 via a spline coupling 510, forming a short-path transmission chain of "motor 220 → spline coupling 510 → first transmission pipe 520 → pipe cracking head 100". This reduces power loss and improves transmission efficiency, enabling the spiral blade 110 to crush the original pipe 20 with sufficient torque. This embodiment features stable torque transmission, flexible axial movement, and a compact structure, making it particularly suitable for trenchless replacement of the original pipe 20. It can significantly improve construction efficiency, reduce equipment wear, and provide reliable technical support for operations under complex pipeline conditions.

[0059] See Figure 2 In some embodiments, the spin-cutting pipe replacement system for short pipe replacement also includes a transmission assembly 600; the transmission assembly 600 includes a drive gear 610 and a driven gear 620, the output shaft of the motor 220 is connected to the drive gear 610, and the drive gear 610 and the driven gear 620 cooperate; the guide mechanism 500 also includes a second transmission pipe 530, the driven gear 620 is connected to the second transmission pipe 530, one of the second transmission pipe 530 and the first transmission pipe 520 is connected to the external spline of the spline coupling 510, and the other is connected to the internal spline of the spline coupling 520.

[0060] In this embodiment, the torque of the output shaft of the motor 220 is indirectly transmitted to the second transmission tube 530 through the cooperation of the driving gear 610 and the driven gear 620, and then transmitted to the first transmission tube 520 and the pipe-cracking head 100 through the spline coupling 510. The gear transmission has high torque carrying capacity and transmission efficiency, suitable for the high torque requirements of cutting the original pipe in pipe-cracking operations. The external and internal splines of the spline coupling 510 are clearance-fitted, allowing the second transmission tube 530 and the first transmission tube 520 to move axially relative to each other while transmitting torque. Thus, during the pipe-cracking process, when the pipe-cracking head 100 encounters resistance or changes in terrain, the spline coupling 510 can compensate for axial displacement, preventing damage to the transmission system due to rigid connections. Furthermore, the combination of gear transmission and spline coupling 510 separates the drive mechanism 200 and the pipe-cracking head 100 into independent modules, facilitating on-site assembly and disassembly. This embodiment optimizes torque transmission efficiency and axial compensation capability, making it particularly suitable for pipeline replacement operations under complex conditions, while balancing construction efficiency and equipment reliability.

[0061] Figure 3 The diagram shown is a partial structural schematic of the transmission component in an embodiment of this application. Figure 4 The diagram shown is a schematic diagram of the connection structure between the second transmission tube and the driven gear in an embodiment of this application.

[0062] See Figures 2 to 4In some embodiments, the transmission assembly further includes an assembly 640; the second transmission pipe 530 is provided with a radial connecting through hole, and the driven gear is provided with a radial mounting through hole; the assembly 640 includes a mounting nut 641, a socket pin 642, and a rotating wheel 643, the rotating wheel 643 being coaxial with the driven gear and located outside the driven gear, the rotating wheel 643 being provided with a radial mounting through hole 6431, the socket pin 642 passing through the mounting through hole 6431, the mounting through hole, and the connecting through hole, the mounting nut 641 being threadedly connected to the socket pin 642, and the end face of the mounting nut 641 abutting against the outer side of the rotating wheel 643.

[0063] In this embodiment, the socket pin 642 passes through the radial through-holes of the second transmission tube 530, the driven gear, and the rotating wheel 643 simultaneously, and is locked with the mounting nut 641 to form a rigid connection structure. This design ensures that the torque transmission path from the driven gear to the second transmission tube 530 is short and direct, effectively reducing energy loss and transmission backlash, and improving the cutting efficiency of the tube splitting head. In addition, the rotating wheel 643, as an intermediate transition component, expands the contact area between the socket pin 642 and the driven gear and the second transmission tube 530, making the load distribution more uniform, reducing local stress concentration, and extending the service life of the components.

[0064] See Figure 1 In some embodiments, the actuation mechanism includes an actuation device 410 and a hydraulic power unit 420 located within the working well 40, the hydraulic power unit 420 actuating the new pipe 10 via the actuation device 410.

[0065] In this embodiment, the hydraulic power unit 420, with its low noise, provides stable and powerful propulsion. By placing the hydraulic power unit 420 within the working shaft 40, existing construction space can be effectively utilized, reducing the need for ground equipment and minimizing the impact of construction on the surrounding environment. Furthermore, it facilitates centralized management and maintenance, ensuring the stability of the power supply. This embodiment, through the coordinated operation of the pushing device 410 and the hydraulic power unit 420, achieves precise control over the propulsion speed and force of the new pipeline 10, preventing deformation or positional deviation of the new pipeline 10 due to uneven thrust. This improves the accuracy and efficiency of pipeline laying. Simultaneously, the overload protection function of the hydraulic system effectively prevents equipment damage, extends service life, and reduces construction risks and costs.

[0066] See Figure 1 In some embodiments, the pushing device 410 is a jack 411, and the hydraulic power device 420 is a hydraulic pump 421; a pad 430 is provided between the end face of the new pipe 10 away from the pipe cracking head 100 and the piston rod end of the jack 411.

[0067] In this embodiment, a combination of "jack 411 + hydraulic pump 421" is used for propulsion, and a pad 430 is provided to effectively improve the stability and safety of pipeline replacement operations. Jack 411, as the actuating component, provides high thrust and is flexible in operation. Combined with the stable power output of hydraulic pump 421, it can precisely control the speed and force of pushing the new pipeline 10, adapting to the laying requirements of pipelines of different diameters and materials. The pad 430 avoids direct contact between the piston rod of jack 411 and the end face of the new pipeline 10, dispersing concentrated stress and preventing deformation or damage to the pipeline due to excessive local stress. It also increases the contact area, reduces friction during propulsion, ensures the smooth advancement of the new pipeline 10, improves construction efficiency and laying accuracy, and reduces construction costs and equipment wear.

[0068] Figure 5 The diagram shown is a front view of the connection structure between the pipe bursting head and the pipe connector in an embodiment of this application. Figure 6 The diagram shown is a cross-sectional connection diagram of the pipe splitting head and the pipe connector in an embodiment of this application.

[0069] See Figure 1 , Figure 5 and Figure 6 In some embodiments, the pipe connector 300 includes a connector sleeve 310, which is connected to the tail of the pipe splitter head 100 via a rotating bearing 301; the connector sleeve 310 is used to connect to the new pipe 10.

[0070] In this embodiment, the connecting sleeve 310 is connected to the tail of the pipe-cracking head 100 via a rotating bearing. This allows the connecting sleeve 310 and the new pipe 10 to remain relatively stationary while the pipe-cracking head 100 rotates to break obstacles. This prevents the new pipe 10 from twisting or being damaged as it rotates with the pipe-cracking head 100, ensuring the integrity and installation accuracy of the new pipe 10. At the same time, the low friction characteristics of the rotating bearing 301 reduce the rotational resistance of the pipe-cracking head 100 and improve the crushing efficiency.

[0071] In some embodiments, the pipe connector 300 further includes a connecting sleeve 320, one end of which is fixedly connected to the connector sleeve 310 via a detachable connector 302, and the other end of which is used to be fixedly connected to the new pipe 10.

[0072] In this embodiment, the connecting sleeve 310 is connected to the pipe-breaking head 100 via a rotating bearing 301, primarily bearing the rotational torque; the connecting sleeve 320 is fixedly connected to the new pipe 10, primarily bearing the axial thrust. The connecting sleeves 310 and 320, combined through a detachable structure, form a dual-function module of "rotational transmission + axial load bearing," avoiding structural fatigue or deformation caused by a single component simultaneously bearing torque and thrust. Furthermore, the detachable connector 302 facilitates the assembly / disassembly of the connecting sleeve 320 and the connecting sleeve 310, especially in confined working spaces, allowing for segmented installation and improved construction efficiency. The detachable connector 302 facilitates the rapid assembly and replacement of the new pipe 10 and the connecting sleeve 310, and also facilitates the maintenance and reuse of the pipe connector 300, reducing construction costs and enhancing the practicality and economy of the pipe replacement system.

[0073] In practical implementation, the other end of the connecting sleeve 320 can be designed with a dedicated interface (such as socket type, flange type, etc.) for new pipes 10 with different outer diameters and materials. When replacing with different types of new pipes, only the connecting sleeve needs to be replaced, without the need to completely disassemble the connection between the connecting sleeve and the pipe bursting head, reducing adaptation costs. The end of the connecting sleeve 320 that connects to the new pipe 10 can be provided with a retaining ring, which fits and engages with the new pipe 10 to achieve connection.

[0074] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A spin-cutting pipe replacement system for short pipe replacement, characterized in that, include: The pipe-cracking head has a conical head and a spiral blade on the outer periphery of the head. A drive mechanism is used to drive the tube-breaking machine head to rotate; A pipe connector, one end of which is rotatably connected to the tail of the pipe-breaking machine head, and the other end of which is used to connect a new pipe; as well as A propulsion mechanism is connected to the end of the new pipeline away from the pipe-breaking head, and is used to propel the new pipeline forward along the original pipeline; A guiding mechanism, installed between the drive mechanism and the pipe cracking head, is used to transmit the torque of the motor to the pipe cracking head and allow the pipe cracking head and the motor to move axially relative to each other along the direction of the motor output shaft axis.

2. The spin-cutting pipe replacement system for short pipe replacement as described in claim 1, characterized in that, The drive mechanism is disposed in the receiving well, and the drive mechanism includes a mounting base and a motor mounted on the mounting base; The guiding mechanism includes a spline coupling and a first transmission tube. The external spline and internal spline of the spline coupling are clearance-fitted. The first transmission tube is connected to the head of the pipe splitting machine head. One of the motor's output shaft and the first transmission tube is connected to the external spline of the spline coupling, and the other is connected to the internal spline of the spline coupling.

3. The spin-cutting pipe replacement system for short pipe replacement as described in claim 2, characterized in that, The transmission assembly includes a driving gear and a driven gear. The output shaft of the motor is connected to the driving gear, and the driving gear cooperates with the driven gear. The guiding mechanism further includes a second transmission tube, the driven gear is connected to the second transmission tube, one of the second transmission tube and the first transmission tube is connected to the external spline of the spline coupling, and the other is connected to the internal spline of the spline coupling.

4. The spin-cutting pipe replacement system for short pipe replacement as described in claim 3, characterized in that, The transmission assembly also includes mounting parts; The second transmission tube is provided with a radial connecting through hole, and the driven gear is provided with a radial mounting through hole; The assembly includes a mounting nut, a socket pin, and a rotating wheel. The rotating wheel is coaxial with the driven gear and located outside the driven gear. The rotating wheel has a radial mounting through hole. The socket pin passes through the mounting through hole, the mounting through hole, and the connecting through hole. The mounting nut is threaded to the socket pin, and the end face of the mounting nut abuts against the outer side of the rotating wheel.

5. The spin-cutting pipe replacement system for short pipe replacement as described in claim 1, characterized in that, The propulsion mechanism includes a propulsion device and a hydraulic power unit located in the working well, the hydraulic power unit propelling the new pipeline via the propulsion device.

6. The spin-cutting pipe replacement system for short pipe replacement as described in claim 5, characterized in that, The pushing device is a jack, and the hydraulic power device is a hydraulic pump; A pad is provided between the end face of the new pipe away from the pipe-cracking head and the piston rod end of the jack.

7. The spin-cutting pipe replacement system for short pipe replacement as described in claim 1, characterized in that, The pipe connector includes a connecting sleeve, which is connected to the tail end of the pipe cracking head via a rotating bearing; The connecting sleeve is used to connect to the new pipeline.

8. The spin-cutting pipe replacement system for short pipe replacement as described in claim 7, characterized in that, The pipe connector also includes a connecting sleeve, one end of which is fixedly connected to the connector sleeve via a detachable connector, and the other end of which is used to connect to a new pipe.

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