A trenchless horizontal directional drilling expansion device and method for a water supply network

Abstract

The present invention relates to the technical field of pipe network construction, and specifically to a device and method for horizontal directional drilling and expansion of trenchless pipes in a water supply pipe network. The device comprises a base and a receiving track movably arranged on the base, and also comprises: a clamping mechanism, one group of which is arranged on each side of the receiving track, the clamping mechanism can clamp and limit the pipe located in the receiving track by storing elastic potential energy, the clamping mechanism is connected to a pressure-applying mechanism arranged on the side of the receiving track; a hydraulic drive mechanism is installed on the base and connected to the receiving track, the hydraulic drive mechanism is used to drive the receiving track to deflect on the base to change the pushing angle of the pipe; during the construction process, the limiting force exerted on the pipe can be automatically enhanced as the pushing angle increases, and there is no need for staff to perform debugging according to specific circumstances, thus eliminating the time-consuming and labor-intensive operation process and improving the construction efficiency to a certain extent.

Description

Technical Field

[0001] The invention relates to the technical field of pipe network construction, and in particular to a device and method for horizontal directional drilling expansion of trenchless pipes in a water supply pipe network. Background Art

[0002] Horizontal directional drilling rig is a kind of construction machinery used for laying various underground public facilities (pipelines, cables, etc.) without excavating the ground surface. It is widely used in the laying of flexible pipelines for water supply, electricity, telecommunications, natural gas, coal gas, oil, etc. It is suitable for sandy soil, clay, etc.

[0003] During construction, a horizontal directional drilling expansion device is required to push the pipeline into the soil. Generally, according to construction requirements, the pipeline must be pushed into the soil at a specific angle. At this time, during the process of pushing the pipeline, construction workers need to position the pipeline to ensure that the pipeline can be pushed along the ideal path. However, if the specific conditions in the soil are unclear, the pipeline is prone to deviation during the pushing process, which may cause harm to the construction workers and pose a safety hazard.

[0004] Or the existing positioning means, usually use a fixed frame to limit the pushing path of the pipeline. However, in order to prevent the pipeline from sliding down when tilted and affecting the construction progress, this positioning method needs to ensure that the pipeline has sufficient limiting force. However, when the pipeline is pushed horizontally, the limiting force is large, which will increase the load of the pushing mechanism. At this time, the staff needs to debug the frame according to the specific situation. The operation process is more troublesome, affecting the construction efficiency, and it is difficult to achieve the ideal use effect. Summary of the invention

[0005] The object of the present invention is to provide a device and method for horizontal directional drilling expansion of trenchless pipelines in a water supply network to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a horizontal directional drilling expansion device for a trenchless pipeline of a water supply network, comprising a base and a receiving track movably arranged on the base, and also comprising: a clamping mechanism, one group of which is arranged on each side of the receiving track, the clamping mechanism can clamp and limit the pipeline located in the receiving track by storing elastic potential energy, and the clamping mechanism is connected to a pressure-applying mechanism arranged on the side of the receiving track; a hydraulic drive mechanism, which is installed on the base and connected to the receiving track, the hydraulic drive mechanism is used to drive the receiving track to deflect on the base so that the pushing angle of the pipeline changes, and when the receiving track deflects from a horizontal state to an inclined state, the pressure-applying mechanism is triggered, which can increase the elastic potential energy stored in the clamping mechanism, so that the clamping force of the two groups of the clamping mechanisms on the pipeline is increased; wherein, a boosting mechanism is also installed on the receiving track, and the boosting mechanism can move along the length direction of the receiving track and perform a pushing action on the pipeline located in the receiving track.

[0007] As a further solution of the present invention: the clamping mechanism includes a clamping member movably arranged in the receiving track, the clamping member is arranged in an arc shape, and is connected to two groups of elastic energy storage components installed on the side of the receiving track, and the elastic energy storage components are connected to the pressure mechanism.

[0008] As a further solution of the present invention: the elastic energy storage component includes an assembly cylinder movably arranged on the outer wall of the receiving track and a cylindrical rod slidably fitted with the assembly cylinder, the cylindrical rod passes through the side of the receiving track and is slidably connected to the receiving track, and is also fixedly connected to the clamping member; wherein the assembly cylinder is connected to the pressure-applying mechanism, the cylindrical rod is also fixed to a circular boss slidably arranged in the assembly cylinder, and a cylindrical spring is also provided in the assembly cylinder, the cylindrical spring is sleeved on the outer periphery of the cylindrical rod, one end of which is connected to the circular boss, and the other end is connected to the inner wall of the assembly cylinder.

[0009] As a further solution of the present invention: two relatively arranged support arms are fixed on the base, and an axle pin is rotatably installed on each of the two support arms. The receiving rail is fixed between the two axle pins, and the hydraulic drive mechanism includes two hydraulic cylinders rotatably installed on the base, and the movable ends of the two hydraulic cylinders are hinged to the bottom of the receiving rail.

[0010] As a further solution of the present invention: the pressure mechanism includes a follower component arranged on the side of the receiving rail and two sets of transmission structures connecting the follower component and the assembly cylinder, the follower component includes a guide rail fixedly installed on the side of the receiving rail, a movable seat slidably engaged with the guide rail, and a roller installed on the movable seat at one end away from the assembly cylinder, a movable guide plate is also fixed on the base, the movable guide plate is provided with a limiting groove adapted to the roller, the roller is located in the limiting groove and rollingly cooperates with the movable guide plate.

[0011] As a further solution of the present invention: the limiting groove is a smooth arc groove, and the trajectory from one end to the other end thereof gradually approaches or moves away from the center of the shaft pin.

[0012] As a further solution of the present invention: the transmission structure includes a guide plate fixedly installed on the side of the receiving rail, a follower plate slidably fitted with the guide plate and fixedly connected to the assembly cylinder, and a transmission plate fixedly connected to the follower plate through a connecting arm; wherein, a driving cylinder is fixedly installed on the end of the movable seat away from the roller through a fastening plate, and an inclined through groove adapted to the driving cylinder is provided on the transmission plate, and the driving cylinder passes through the inclined through groove and is slidably connected to the transmission plate.

[0013] As a further solution of the present invention: a supporting portion is provided in the receiving rail, and a guide groove penetrating the bottom of the receiving rail is provided on the supporting portion, and the boosting mechanism includes a slider slidably engaged in the guide groove and a boosting member fixed to the slider and located in the receiving rail; the boosting member is arranged in a conical shape, and a threaded rod is rotatably installed at the bottom of the receiving rail, the threaded rod penetrates the slider and is threadedly connected thereto, and a driving motor is also installed at the end of the receiving rail, and the threaded rod is connected to the output end of the driving motor.

[0014] A method for horizontal directional drilling and expansion of a trenchless pipeline in a water supply network, using the horizontal directional drilling and expansion device, comprises the following steps:

[0015] Step 1: Place the pipeline to be constructed in the receiving track, and use the elastic potential energy stored in the clamping mechanism to clamp and position the pipeline;

[0016] Step 2: According to the construction requirements, the hydraulic drive mechanism is controlled to drive the receiving track to tilt until the pushing angle required by the pipeline is reached, and the pressure mechanism is triggered to increase the elastic potential energy stored in the clamping mechanism;

[0017] Step three, the booster mechanism works and moves along the length direction of the receiving track to perform a pushing operation on the pipeline located in the receiving track.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: during construction, the elastic potential energy stored in the two groups of the clamping mechanisms is used to clamp and position the pipeline, and the hydraulic drive mechanism drives the receiving track to tilt to change the pushing angle of the pipeline; in the process of increasing the pushing angle of the pipeline, the pressure mechanism can be triggered to increase the elastic potential energy stored in the clamping mechanism to enhance the positioning strength of the two groups of the clamping mechanisms on the pipeline when the pipeline is in an inclined state; therefore, in the case of a small inclination angle, the clamping force of the clamping mechanism on the pipeline is also relatively small, which can ensure the positioning of the pipeline to ensure the stability of the pipeline pushing process, and can also avoid the problem of excessive load on the boosting mechanism; therefore, during the construction process, the limiting force on the pipeline can be automatically enhanced as the pushing angle increases, and the staff does not need to debug according to the specific situation, which saves time and effort in the operation process, and can improve the construction efficiency to a certain extent. In addition, since the booster is set in a conical shape, the conical surface of the booster can fit with the end of the pipeline during the pushing process of the pipeline, ensuring the uniformity of the thrust on the pipeline and improving the stability of the pipeline pushing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of an embodiment of a trenchless horizontal directional drilling expansion device for a water supply network;

[0020] Figure 2 A schematic structural diagram of another angle of an embodiment of a trenchless horizontal directional drilling expansion device for a water supply network;

[0021] Figure 3 A schematic structural diagram of a trenchless horizontal directional drilling expansion device for a water supply network from another angle according to an embodiment of the present invention;

[0022] Figure 4 A side view of an embodiment of a trenchless horizontal directional drilling expansion device for a water supply network;

[0023] Figure 5 for Figure 3 A magnified view of the structure at center A;

[0024] Figure 6 A schematic diagram of the connection relationship between a hydraulic drive mechanism and a receiving rail in one embodiment of a trenchless horizontal directional drilling and expansion device for a water supply network;

[0025] Figure 7 It is a structural exploded diagram of a pressure-applying mechanism in one embodiment of a trenchless horizontal directional drilling expansion device for a water supply network;

[0026] Figure 8 This is a schematic structural diagram of a movable guide plate in one embodiment of a trenchless horizontal directional drilling expansion device for a water supply network.

[0027] In the figure: 1, base; 2, axle pin; 3, receiving track; 4, supporting part; 401, guide groove; 5, clamping member; 6, assembly tube; 7, cylindrical rod; 8, circular boss; 9, cylindrical spring; 10, transmission plate; 1001, inclined through groove; 11, guide plate; 12, follower plate; 13, driving cylinder; 14, guide rail; 15, movable seat; 16, roller; 17, movable guide plate; 1701, limit groove; 18, driving motor; 19, threaded rod; 20, slider; 21, booster; 22, hydraulic cylinder; 23, connecting arm; 24, fastening plate; 25, support arm. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0030] See also Figure 1-Figure 8 In an embodiment of the present invention, a horizontal directional drilling expansion device for a trenchless pipeline of a water supply network includes a base 1 and a receiving track 3 movably arranged on the base 1, and also includes: a clamping mechanism, one group of which is provided on each side of the receiving track 3, the clamping mechanism can clamp and limit the pipeline located in the receiving track 3 by storing elastic potential energy, and the clamping mechanism is connected to a pressure-applying mechanism arranged on the side of the receiving track 3; a hydraulic drive mechanism, which is installed on the base 1 and connected to the receiving track 3, and the hydraulic drive mechanism is used to drive the receiving track 3 to deflect on the base 1 so that the pushing angle of the pipeline changes. When the receiving track 3 deflects from a horizontal state to an inclined state, the pressure-applying mechanism is triggered, which can increase the elastic potential energy stored in the clamping mechanism, so that the clamping force of the two groups of the clamping mechanisms on the pipeline is increased; wherein, a boosting mechanism is also installed on the receiving track 3, and the boosting mechanism can move along the length direction of the receiving track 3 and perform a pushing action on the pipeline located in the receiving track 3.

[0031] Specifically, during actual construction, the pipe to be installed is placed in the receiving track 3, and the two groups of the clamping mechanisms store elastic potential energy and use the elastic potential energy to clamp the pipe so that the pipe is limited in the receiving track 3 to ensure that the pipe can be pushed in along the ideal path. Then, according to the construction requirements, the pushing angle of the pipe is adjusted, that is, the hydraulic drive mechanism is started, and the hydraulic drive mechanism drives the receiving track 3 to deflect on the base 1, and the receiving track 3 is switched from a horizontal state to an inclined state until the pipe reaches the ideal pushing angle. Then, the booster mechanism starts to work and pushes the pipe to move along the length direction of the receiving track 3, so that the pipe is pushed into the soil along the ideal route. It should be supplemented that The greater the inclination angle of the receiving track 3, the greater the component of the gravity of the pipeline located therein in the length direction of the receiving track 3, and the pipeline is more likely to slide down. At this time, the clamping effect of the two groups of the clamping mechanisms on the pipeline is reduced. In order to avoid the pipeline sliding down due to the excessive inclination of the receiving track 3, the pressure mechanism is triggered during the deflection of the receiving track 3, aiming to achieve the variability of the elasticity stored in the clamping mechanism, that is, the elastic potential energy stored in the clamping mechanism and the positioning strength of the two groups of clamping mechanisms on the pipeline increase with the increase of the pushing angle of the pipeline, so as to avoid the positioning effect of the pipeline being affected. When the receiving track 3 is in a horizontal state, at this time, the positioning strength of the two groups of the clamping mechanisms on the pipeline should not be too large, so as to avoid increasing the load of the boosting mechanism.

[0032] Please refer again Figure 3 , Figure 5 as well as Figure 7 The clamping mechanism includes a clamping member 5 movably arranged in the receiving track 3, the clamping member 5 is arranged in an arc shape, and is connected to two groups of elastic energy storage components installed on the side of the receiving track 3, and the elastic energy storage components are connected to the pressure mechanism.

[0033] The elastic energy storage component includes an assembly tube 6 movably arranged on the outer wall of the receiving track 3 and a columnar rod 7 slidably fitted with the assembly tube 6, the columnar rod 7 passes through the side of the receiving track 3 and is slidably connected to the receiving track 3, and is also fixedly connected to the clamping member 5; wherein the assembly tube 6 is connected to the pressure-applying mechanism, the columnar rod 7 is also fixed to a circular boss 8 slidably arranged in the assembly tube 6, and a columnar spring 9 is also provided in the assembly tube 6, the columnar spring 9 is sleeved on the outer periphery of the columnar rod 7, one end of which is connected to the circular boss 8, and the other end of which is connected to the inner wall of the assembly tube 6.

[0034] Furthermore, when the inclination of the receiving track 3 increases, the pressure-applying mechanism is triggered to drive the assembly tube 6 to move closer to the receiving track 3. Since the clamping member 5 is in contact with the outer wall of the pipe at this time, the clamping member 5 and the columnar rod 7 remain relatively still with the pipe, and the assembly tube 6 moves closer to the receiving track 3, which increases the compression of the columnar spring 9. Accordingly, the clamping force of the pipe between the two clamping members 5 increases, that is, the positioning strength is enhanced, which can effectively avoid the problem of the pipe sliding down due to the excessive inclination of the receiving track 3.

[0035] Two supporting arms 25 arranged opposite to each other are fixed on the base 1, and an axle pin 2 is rotatably mounted on each of the two supporting arms 25. The receiving track 3 is fixed between the two axle pins 2. The hydraulic drive mechanism includes two hydraulic cylinders 22 rotatably mounted on the base 1, and the movable ends of the two hydraulic cylinders 22 are hinged to the bottom of the receiving track 3. The pressure mechanism includes a follower assembly arranged on the side of the receiving track 3 and two sets of transmission structures connecting the follower assembly and the assembly cylinder 6. The follower assembly includes a guide rail 14 fixedly mounted on the side of the receiving track 3, a movable seat 15 slidably engaged with the guide rail 14, and a roller 16 mounted on the end of the movable seat 15 away from the assembly cylinder 6. A movable guide plate 17 is also fixed on the base 1, and a limiting groove 1701 adapted to the roller 16 is provided on the movable guide plate 17. The roller 16 is located in the limiting groove 1701 and rollingly engaged with the movable guide plate 17.

[0036] It should be emphasized that the limiting groove 1701 is a smooth arc groove, and the trajectory from one end to the other end thereof gradually approaches or moves away from the center of the shaft pin 2.

[0037] The transmission structure includes a guide plate 11 fixedly mounted on the side of the receiving track 3, a follower plate 12 slidably fitted with the guide plate 11 and fixedly connected to the assembly cylinder 6, and a transmission plate 10 fixedly connected to the follower plate 12 via a connecting arm 23. The end of the movable seat 15 away from the roller 16 is fixedly mounted with a driving cylinder 13 via a fastening plate 24, and an inclined through slot 1001 adapted to the driving cylinder 13 is provided on the transmission plate 10, and the driving cylinder 13 passes through the inclined through slot 1001 and is slidably connected to the transmission plate 10.

[0038] When the hydraulic cylinder 22 drives the receiving track 3 to gradually tilt from a horizontal state, the roller 16 rolls in the limiting groove 1701 toward the end away from the base 1. Accordingly, the roller 16 gets closer and closer to the center of the axle pin 2, so that the movable seat 15 slides close to the axle pin 2 on the guide rail 14, and the driving cylinder 13 moves with the movable seat 15 and slides with the transmission plate 10 through the inclined through groove 1001, so that the transmission plate 10 drives the follower plate 12 to slide toward the inside of the guide plate 11 through the connecting arm 23, and the assembly tube 6 moves close to the receiving track 3. At this time, the pipeline is located between the two clamping members 5, and the clamping member 5 and the columnar rod 7 remain relatively stationary with the pipeline. The compression amount of the columnar spring 9 gradually increases, and the clamping force of the two clamping members 5 on the pipeline increases, so that the positioning strength of the pipeline is increased.

[0039] Please refer again Figure 3 , Figure 4 as well as Figure 6 The receiving track 3 is provided with a supporting part 4, and the supporting part 4 is provided with a guide groove 401 penetrating the bottom of the receiving track 3. The boosting mechanism includes a slider 20 slidably engaged in the guide groove 401 and a boosting member 21 fixed to the slider 20 and located in the receiving track 3. The boosting member 21 is arranged in a cone shape, and a threaded rod 19 is rotatably installed at the bottom of the receiving track 3, and the threaded rod 19 penetrates the slider 20 and is threadedly connected thereto. A driving motor 18 is also installed at the end of the receiving track 3, and the threaded rod 19 is connected to the output end of the driving motor 18.

[0040] When the pipeline is pushed, the driving motor 18 works to drive the threaded rod 19 to rotate. Under the guiding action of the guide groove 401, the slider 20 is threadedly engaged with the threaded rod 19, and the slider 20 drives the booster 21 to move along the length direction of the receiving track 3 in the receiving track 3. Since the booster 21 is arranged in a conical shape, during the process of pushing the pipeline, the conical surface of the booster 21 can fit with the end of the pipeline, ensuring the uniformity of the thrust applied to the pipeline and improving the stability of the pipeline pushing process.

[0041] As another embodiment of the present invention, a method for horizontal directional drilling and expansion of a trenchless pipeline in a water supply network is also proposed, using the horizontal directional drilling and expansion device, comprising the following steps:

[0042] Step 1: Place the pipeline to be constructed in the receiving track 3, and use the elastic potential energy stored in the clamping mechanism to clamp and position the pipeline;

[0043] Step 2: According to the construction requirements, the hydraulic drive mechanism is controlled to drive the receiving track 3 to tilt until the pushing angle required by the pipeline is reached, and the pressure mechanism is triggered to increase the elastic potential energy stored in the clamping mechanism;

[0044] Step three, the boosting mechanism works and moves along the length direction of the receiving track 3 to perform a pushing operation on the pipeline located in the receiving track 3.

[0045] For the horizontal directional drilling expansion device, during construction, first move the two clamping members 5 apart, place the pipe to be placed on the supporting portion 4, and then release the clamping member 5. Then, the clamping member 5 is in contact with the outer wall of the pipe, the columnar spring 9 is compressed, and the pipe is positioned between the two clamping members 5. When it is necessary to push the pipe at a certain angle, the hydraulic cylinder 22 is controlled to work, the movable end of the hydraulic cylinder 22 is extended, and the hydraulic cylinder 22 itself is rotated on the base 1, causing the receiving track 3 to deflect. During the deflection of the receiving track 3, the roller 16 rolls in the limiting groove 1701 toward the end away from the base 1, and the roller 16 is closer and closer to the center of the axle pin 2. The movable seat 15 is on the guide rail 14. Sliding close to the axle pin 2, the driving cylinder 13 slides with the transmission plate 10 through the inclined through groove 1001, causing the transmission plate 10 to drive the follower plate 12 to slide toward the inside of the guide plate 11 through the connecting arm 23, and the assembly cylinder 6 moves close to the receiving track 3, so that the compression amount of the columnar spring 9 increases, and the positioning strength of the two clamping members 5 on the pipeline is improved; after the pushing angle of the pipeline is determined, the driving motor 18 starts to drive the threaded rod 19 to rotate, and the slider 20 drives the booster 21 to move in the receiving track 3 along the length direction of the receiving track 3, and the conical surface on the booster 21 abuts against the end of the pipeline, pushing the pipeline into the soil along the length direction of the receiving track 3.

[0046] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0047] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A trenchless horizontal directional drilling expansion device for a water supply network, comprising a base (1) and a receiving track (3) movably arranged on the base (1); It is characterized in that Also includes: A clamping mechanism, one set of which is provided on each side of the receiving track (3), the clamping mechanism being capable of clamping and limiting the position of the pipe located in the receiving track (3) by storing elastic potential energy, and the clamping mechanism being connected to a pressure-applying mechanism provided on the side of the receiving track (3); A hydraulic drive mechanism is mounted on the base (1) and connected to the receiving track (3). The hydraulic drive mechanism is used to drive the receiving track (3) to deflect on the base (1) so as to change the pushing angle of the pipeline. When the receiving track (3) deflects from a horizontal state to an inclined state, the pressure mechanism is triggered to increase the elastic potential energy stored in the clamping mechanism, so as to increase the clamping force of the two groups of clamping mechanisms on the pipeline. Wherein, a boosting mechanism is also installed on the receiving track (3), and the boosting mechanism can move along the length direction of the receiving track (3) and perform a pushing action on the pipeline located in the receiving track (3); The clamping mechanism comprises a clamping member (5) movably arranged in the receiving track (3), the clamping member (5) being arranged in an arc shape and connected to two groups of elastic energy storage components installed on the side of the receiving track (3), and the elastic energy storage components being connected to the pressure mechanism; The elastic energy storage component comprises an assembly tube (6) movably arranged on the outer wall of the receiving track (3) and a columnar rod (7) slidably fitted with the assembly tube (6); the columnar rod (7) penetrates the side of the receiving track (3) and is slidably connected to the receiving track (3), and is also fixedly connected to the clamping member (5); The assembly tube (6) is connected to the pressure mechanism, the columnar rod (7) is also fixed to a circular boss (8) slidably arranged in the assembly tube (6), and a columnar spring (9) is also arranged in the assembly tube (6), and the columnar spring (9) is sleeved on the outer periphery of the columnar rod (7), one end of which is connected to the circular boss (8) and the other end of which is connected to the inner wall of the assembly tube (6); The base (1) is fixed with two supporting arms (25) arranged opposite to each other, each of the two supporting arms (25) is rotatably mounted with an axle pin (2), the receiving rail (3) is fixed between the two axle pins (2), and the hydraulic drive mechanism comprises two hydraulic cylinders (22) rotatably mounted on the base (1), and the movable ends of the two hydraulic cylinders (22) are hinged to the bottom of the receiving rail (3); The pressure mechanism comprises a follower assembly arranged on the side of the receiving track (3) and two sets of transmission structures connecting the follower assembly and the assembly cylinder (6), the follower assembly comprising a guide rail (14) fixedly mounted on the side of the receiving track (3), a movable seat (15) slidably engaged with the guide rail (14), and a roller (16) mounted on the end of the movable seat (15) away from the assembly cylinder (6); A movable guide plate (17) is also fixed on the base (1), and a limiting groove (1701) adapted to the roller (16) is provided on the movable guide plate (17), and the roller (16) is located in the limiting groove (1701) and rollingly cooperates with the movable guide plate (17); The transmission structure comprises a guide plate (11) fixedly mounted on the side of the receiving track (3), a follower plate (12) slidably fitted with the guide plate (11) and fixedly connected to the assembly cylinder (6), and a transmission plate member (10) fixedly connected to the follower plate (12) via a connecting arm (23); The end of the movable seat (15) away from the roller (16) is fixedly mounted with a driving cylinder (13) via a fastening plate (24); the transmission plate (10) is provided with an inclined through groove (1001) adapted to the driving cylinder (13); the driving cylinder (13) passes through the inclined through groove (1001) and is slidably connected to the transmission plate (10).

2. The trenchless horizontal directional drilling expansion device for a water supply network according to claim 1, characterized in that: The limiting groove (1701) is a smooth arc groove, and the trajectory from one end to the other end thereof gradually approaches or moves away from the center of the shaft pin (2).

3. The trenchless horizontal directional drilling expansion device for a water supply network according to claim 1, characterized in that: A supporting portion (4) is provided in the receiving track (3), and a guide groove (401) is provided on the supporting portion (4) and passes through the bottom of the receiving track (3), and the boosting mechanism comprises a slider (20) slidably engaged in the guide groove (401) and a boosting member (21) fixed to the slider (20) and located in the receiving track (3); The booster (21) is arranged in a conical shape, a threaded rod (19) is rotatably mounted on the bottom of the receiving track (3), the threaded rod (19) passes through the slider (20) and is threadedly connected thereto, a drive motor (18) is also mounted on the end of the receiving track (3), and the threaded rod (19) is connected to the output end of the drive motor (18).

4. A method for horizontal directional drilling and expansion of trenchless pipes in a water supply network, using the horizontal directional drilling and expansion device as claimed in claim 1, characterized in that: The following steps are involved: Step 1: Place the pipeline to be constructed in the receiving track (3), and use the elastic potential energy stored in the clamping mechanism to clamp and position the pipeline; Step 2: According to the construction requirements, the hydraulic drive mechanism is controlled to drive the receiving track (3) to tilt until the pushing angle required by the pipeline is reached, and the pressure mechanism is triggered to increase the elastic potential energy stored in the clamping mechanism; Step three, the boosting mechanism works and moves along the length direction of the receiving track (3) to perform a pushing operation on the pipeline located in the receiving track (3).

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