A machine head fishing device for tunnel pipe installation

Abstract

The application provides a machine head fishing device for tunnel pipe installation, which comprises a horizontal traction assembly, a vertical traction assembly and a guide frame. The vertical traction assembly is installed on a hoisting ship and is used for vertically lifting the machine head. The horizontal traction assembly is installed on the top of a bank slope and is used for horizontally pulling the machine head. The guide frame is installed on the bank slope. A correction mechanism, a locking mechanism and an unlocking mechanism are arranged on the guide frame. The correction mechanism is slidingly arranged on the guide frame and is used for correcting the posture of the machine head and moving with the machine head to the top of the bank slope. The locking mechanism is used for locking the correction mechanism. The unlocking mechanism is installed on the correction mechanism. The unlocking mechanism is unlocked by the machine head during the correction of the machine head. The application realizes the full-automatic mechanical linkage of the posture correction, the locking and unlocking and the sliding on the bank during the machine head fishing process, and does not need manual intervention, so that the efficiency and safety of the fishing operation are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of pipe jacking construction technology, and specifically to a head retrieval device for tunnel pipe jacking installation. Background Technology

[0002] In tunnel engineering, pipe jacking is a common trenchless technology for crossing rivers, lakes, and other bodies of water. After the tunnel is completed, the underwater pipe jacking machine head needs to be cut, salvaged, and recovered. Currently, a typical salvage operation scheme uses a "floating crane + truck crane" dual-machine coordinated operation: a floating crane vessel vertically lifts the machine head upwards via steel cables, while a large crane on the shore pulls it horizontally back to the shore via another set of steel cables.

[0003] While the above-mentioned solutions have been widely applied in practice, they suffer from several significant technical drawbacks: First, during the stage where the jacking machine is pulled to the shore and out of the water, the lack of a transitional guiding structure makes it prone to hard collisions and friction with the bank slope. This not only damages expensive equipment but may also overload the traction system due to the sudden increase in instantaneous resistance between the jacking machine and the bank slope. Second, when the jacking machine is finally pulled ashore, its posture (horizontal or tilted) is difficult to automatically correct, often requiring manual assistance, which is inefficient and increases operational risks. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a retrieval device for tunnel jacking installation. This device achieves fully automated mechanical linkage for attitude correction, locking release, and sliding onto the shore during the retrieval process, eliminating the need for manual intervention and significantly improving the efficiency and safety of retrieval operations.

[0005] To solve the above-mentioned technical problems, the present invention provides a head retrieval device for tunnel jacking installation, including a horizontal traction component, a vertical traction component, and a guide frame; The vertical traction assembly is installed on the lifting vessel and is used to vertically lift the head of the hoist. The horizontal traction assembly is installed at the top of the bank slope and is used for the head of the horizontal traction machine; The guide frame is installed on the bank slope. The guide frame is equipped with a correction mechanism, a locking mechanism and an unlocking mechanism. The correction mechanism is slidably mounted on the guide frame and is used to correct the posture of the machine head and move with the machine head to the top of the bank slope. The locking mechanism is used to lock the correction mechanism. The unlocking mechanism is installed on the correction mechanism. During the correction process, the unlocking mechanism is released from the locking mechanism by the action of the machine head.

[0006] In some embodiments, a track is provided on the guide frame, the track being perpendicular to the bank slope direction, and the correction mechanism includes a baffle that is slidably disposed on the track. A limiting part is provided on the top of the baffle near the water body. The baffle is used to correct the machine head so that the axis of the machine head is parallel to the bank slope direction, and the limiting part is used to prevent the machine head from disengaging from the baffle.

[0007] In some embodiments, the correction mechanism includes a movable crossbar, a baffle mounted on the movable crossbar, the movable crossbar slidably disposed on a track, a locking hole provided on the movable crossbar, and a locking mechanism including an elastic telescopic rod for engaging with the locking hole to lock the movable crossbar.

[0008] In some embodiments, the unlocking mechanism includes an abutment plate and a push rod. The abutment plate is rotatably connected to a baffle via a torsion spring. The push rod is arranged on the side of the abutment plate away from the water body and is used to cooperate with an elastic telescopic rod. Under the action of the torsion spring, the top of the abutment plate tilts towards the water body. When the machine head approaches the baffle, it presses against the abutment plate, causing the abutment plate to rotate. This causes the push rod to press against the elastic telescopic rod, and the elastic telescopic rod releases the lock on the moving crossbar.

[0009] In some embodiments, the locking mechanism includes an L-shaped insert plate, which includes a first insert plate and a second insert plate that are perpendicular to each other. The first insert plate is parallel to the extension direction of the elastic telescopic rod, and the second insert plate is fixedly connected to the elastic telescopic rod. One end of the first insert plate engages with a locking hole, and the elastic telescopic rod is fixedly connected to the second insert plate. The push rod engages with the elastic telescopic rod through the second insert plate.

[0010] In some embodiments, the baffle has a placement groove and an arc-shaped hole, the abutment plate is rotatably disposed in the placement groove, and when the abutment plate is squeezed by the machine head, the surface of the abutment plate on the side near the water is flush with the surface of the baffle, the arc-shaped hole is connected to the placement groove, and the push rod is slidably disposed in the arc-shaped hole.

[0011] In some embodiments, the movable crossbar is a round bar.

[0012] In some embodiments, the end of the first insert plate is provided with a pressing slope, which is used to cooperate with the movable crossbar so that the movable crossbar presses the elastic telescopic rod through the first insert plate.

[0013] In some embodiments, an auxiliary roller is rotatably mounted on the guide frame, and the rotation axis of the auxiliary roller is parallel to the direction of the bank slope.

[0014] In some embodiments, the vertical traction assembly includes a U-shaped base, a winding motor fixedly mounted on the U-shaped base, a drum rotatably mounted on the U-shaped base, the output shaft of the winding motor being fixedly connected to the rotating shaft of the drum, and a traction rope wound on the drum, one end of which is used to connect to the machine head.

[0015] The beneficial effects of this invention are as follows: 1. This invention slides the correction mechanism onto the guide frame and initially locks it with a locking mechanism. When the machine head is pulled onto the guide frame, the unlocking mechanism on the correction mechanism is automatically released by the force exerted by the machine head during the attitude correction process. This allows the correction mechanism to carry the machine head with the corrected attitude and move smoothly ashore together, eliminating the risks of machine head swaying, rolling, and hard collision with the bank slope. It realizes fully automatic mechanical linkage of attitude correction, locking release, and sliding ashore during the machine head salvage process, without the need for manual intervention, which significantly improves the efficiency and safety of salvage operations.

[0016] 2. By setting a limiting part on the top of the baffle near the water body, when the machine head is gradually corrected to a horizontal posture under the constraint of the baffle, the limiting part can effectively hold the top of the machine head, preventing the machine head from detaching from the baffle when affected by the buoyancy or traction fluctuation of the water flow. This ensures that the machine head is always within the effective constraint range of the baffle during the correction and subsequent sliding process, thus improving the reliability of posture maintenance.

[0017] 3. The present invention locks the correction mechanism by installing a baffle on a movable crossbar and opening a locking hole on the movable crossbar, and by using the insertion and cooperation of the elastic telescopic rod with the locking hole; the elastic telescopic rod always remains in the locked position when there is no external force interference, ensuring that the correction mechanism is firmly fixed in the initial stage.

[0018] 4. This invention provides a retaining plate with a torsion spring reset on the baffle, which keeps the baffle in a tilted state when not under force. When the machine head approaches and presses the retaining plate, the retaining plate rotates and drives the push rod to move, thereby pressing the elastic telescopic rod to release the lock. This purely mechanical linkage structure directly converts the correction action of the machine head into the unlocking driving force, without the need for an additional power source or control signal, and the response is direct and reliable.

[0019] 5. The present invention sets the locking mechanism as an L-shaped insert plate structure, wherein the first insert plate is used to insert into the locking hole to achieve locking, the second insert plate is fixedly connected to the elastic telescopic rod, and the push rod can drive the first insert plate out of the locking hole by pushing the second insert plate, thereby realizing the conversion of the pushing force direction of the push rod into the same movement as the extension and retraction direction of the elastic telescopic rod.

[0020] 6. The present invention provides a placement groove on the baffle to accommodate the abutment plate, so that after the abutment plate is fully compressed by the machine head, its surface is flush with the surface of the baffle, thus preventing the abutment plate from forming a protrusion during the sliding of the machine head and affecting the posture of the machine head; at the same time, the arc-shaped hole is connected to the placement groove to provide motion guidance for the push rod, so that the push rod slides stably along the arc-shaped hole when it rotates with the abutment plate, ensuring the consistency and reliability of repeated actions.

[0021] 7. In this invention, the movable crossbar is set as a round bar, and a pressing slope is set at the end of the first insert plate. When the movable crossbar slides down the track to reset after the retrieval is completed, the surface of the movable crossbar can contact the pressing slope, converting the sliding force of the movable crossbar into a compressive force on the elastic telescopic bar. Thus, the insertion and locking are automatically completed when the locking hole is re-aligned with the first insert plate, without the need for manual retraction of the insert plate. This realizes the automatic reset and locking of the correction mechanism, simplifies the operation steps, ensures smooth reset action, and reduces friction between structures.

[0022] 8. The present invention converts the sliding friction of the machine head moving on the guide frame into rolling friction by rotating auxiliary rollers on the guide frame with the rollers' axis of rotation parallel to the direction of the bank slope. This effectively reduces the frictional resistance of the machine head movement, reduces the load on the traction components, makes the machine head slide on the guide frame more smoothly and effortlessly, and also reduces the wear on the surface of the machine head. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the bottom structure of the base and guide frame of the present invention; Figure 3 for Figure 2 The main view; Figure 4 This is a schematic diagram of the horizontal traction assembly of the present invention; Figure 5 This is a schematic diagram illustrating the cooperation between the tilting guide seat and the moving part of the present invention; Figure 6 This is a cross-sectional view of the locking mechanism and unlocking mechanism of the present invention; Figure 7 This is a schematic diagram of the structure of the abutment plate entering the baffle under force according to the present invention.

[0024] In the diagram: 1. Base; 101. First support; 2. Horizontal traction assembly; 3. Head unit; 4. Support seat; 5. Vertical traction assembly; 6. Guide frame; 601. Connecting plate; 602. Inclined guide seat; 7. U-shaped seat; 701. Gearbox; 702. Drum; 703. Traction rope; 704. Rewinding motor; 8. Auxiliary roller; 9. Moving parts; 901. Moving crossbar; 9011. Locking hole; 902. Side plate; 903. Connecting rod; 10. Support rod; 11. Elastic telescopic rod; 111. L-shaped insert plate; 12. Groove; 121. Guide groove; 13. Baffle; 131. Abutment plate; 1311. Push rod; 14. Second support. Detailed Implementation

[0025] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] like Figure 1 As shown, this invention provides a jacking head retrieval device for tunnel jacking installation, including a base 1, a horizontal traction assembly 2, a vertical traction assembly 5, and a guide frame 6. The base 1 is fixed to the top of the bank slope, and the horizontal traction assembly 2 is fixed on the base 1 for horizontally pulling the jacking head 3, bringing the jacking head 3 closer to the bank. The vertical traction assembly 5 is mounted on a lifting vessel via a support base 4 for vertically lifting the jacking head 3, causing the jacking head 3 to float above the water surface.

[0027] like Figure 3 As shown, one end of the guide frame 6 is rotatably connected to the base 1. The guide frame 6 is laid on the bank slope to ensure that the traction machine head 3 smoothly reaches the bank and exits the water.

[0028] With the combined action of the horizontal traction component 2 and the vertical traction component 5, the machine head 3 can be pulled onto the guide frame 6, and then the horizontal traction component 2 can be used to pull the machine head 3 along the guide frame 6 to the top of the bank slope.

[0029] like Figure 4As shown, the horizontal traction assembly 2 and the vertical traction assembly 5 have the same structure, both including a U-shaped base 7, a gearbox 701, a drum 702, a traction rope 703, and a take-up motor 704. The gearbox 701 is fixed to one side of the U-shaped base 7. The drum 702 is rotatably connected to the U-shaped base 7 and connected to the output shaft of the gearbox 701. The traction rope 703 is wound around the drum 702. The take-up motor 704 is fixed to the outside of the gearbox 701, and its output shaft is connected to the input shaft of the gearbox 701. One end of the traction rope 703 is connected to the machine head 3. By starting the take-up motor 704, the power is amplified and speed-changing through the gearbox 701, driving the drum 702 to rotate, thus enabling the winding and unwinding of the traction rope 703, thereby applying a horizontal pulling force or a vertical lifting force to the machine head 3.

[0030] like Figure 2 As shown, the guide frame 6 includes a connecting plate 601 and a plurality of inclined guide seats 602 arranged equidistantly and parallel to each other. The connecting plate 601 is arranged perpendicular to the inclined guide seats 602. The two ends of the plurality of inclined guide seats 602 are connected together by the connecting plate 601 to form the guide frame 6. Figure 2 The connecting plate 601 near the upper end is not shown in the figure. The guide frame 6 is rotatably connected to the base 1 through the connecting plate 601 at the upper end.

[0031] like Figure 6 As shown, auxiliary rollers 8 are rotatably connected to the base 1 and the inclined guide seat 602 via pins. The rotation axis of the auxiliary rollers 8 is parallel to the direction of the bank slope. The auxiliary rollers 8 protrude from the upper surfaces of the base 1 and the inclined guide seat 602 to reduce the frictional resistance when the machine head 3 moves. In order to reduce the impact between the machine head 3 and the guide frame 6 when it approaches the guide frame 6, a buffer layer is fixedly installed on the lower surface of the guide frame 6. The buffer layer is made of a smooth elastic material, such as wear-resistant neoprene rubber.

[0032] like Figure 3 As shown, a first support 101 is provided at the bottom of the base 1, and a second support 14 is provided at the bottom of the guide frame 6. Both the first support 101 and the second support 14 are fixed by pile foundations.

[0033] like Figure 5 , 6 As shown, a correction mechanism, a locking mechanism, and an unlocking mechanism are provided between two adjacent inclined guide seats 602. The correction mechanism is slidably mounted on the guide frame 6 and is used to correct the attitude of the machine head 3 and move together with the machine head 3 towards the top of the bank slope; the locking mechanism is used to lock the correction mechanism; the unlocking mechanism is installed on the correction mechanism and is released from the locking mechanism by the action of the machine head 3 during the correction process.

[0034] like Figure 2 , 5 As shown, the correction mechanism includes a movable part 9, a support rod 10, and a baffle 13.

[0035] like Figure 5 As shown, the movable component 9 includes a movable crossbar 901, side plates 902 fixed at both ends of the movable crossbar 901, and a connecting rod 903 connecting the two side plates 902. The inclined guide seat 602 has interconnected grooves 12 and guide slots 121. The grooves 12 are formed along the left and right sides of the inclined guide seat 602 and extend through it. The guide slots 121 are formed at the bottom of the inclined guide seat 602. The grooves 12 and guide slots 121 form a track that extends along the slope inclination direction and is perpendicular to the slope direction. The movable crossbar 901 is slidably disposed in the groove 12, the side plates 902 are slidably disposed in the guide slots 121, and the connecting rod 903 is located on the side of the inclined guide seat 602 closest to the slope, ensuring the smooth sliding of the movable component 9. The movable crossbar 901 is a round rod, and a locking hole 9011 is formed on the movable crossbar 901.

[0036] The baffle 13 is fixed to the movable crossbar 901 by the support rod 10. At least three baffles 13 are provided, and the distance between any two adjacent baffles 13 is less than the width of the machine head 3. For example... Figure 6 As shown, each baffle 13 has a limiting part on the top side near the water body. The limiting part is used to hold the top of the machine head 3 when it is constrained by the baffle 13, preventing it from falling off the baffle 13.

[0037] like Figure 6 As shown, the locking mechanism includes an elastic telescopic rod 11 and an L-shaped insert plate 111. The fixed end of the elastic telescopic rod 11 is fixed to the second support 14, and the extension direction of the elastic telescopic rod 11 is perpendicular to the length direction of the moving crossbar 901. The L-shaped insert plate 111 includes a first insert plate and a second insert plate that are perpendicular to each other. The first insert plate is parallel to the extension direction of the elastic telescopic rod 11, and the second insert plate is fixedly connected to the extension end of the elastic telescopic rod 11. The end of the first insert plate away from the second insert plate is inserted into the locking hole 9011 of the moving crossbar 901 to lock the moving part 9. A pressing slope is provided on one side of the end of the first insert plate inserted into the locking hole 9011. The pressing slope is used to cooperate with the moving crossbar 901 when the moving crossbar 901 moves down to reset, so that the moving crossbar 901 can compress the elastic telescopic rod 11 through the pressing slope and the first insert plate.

[0038] like Figure 6 , 7 As shown, the unlocking mechanism includes an abutment plate 131. The baffle plate 13 has a placement groove and an arc-shaped hole. The abutment plate 131 is rotatably connected to the placement groove via a rotating shaft. A torsion spring is sleeved on the rotating shaft. Under the action of the torsion spring, the top of the abutment plate 131 tilts upward toward the water body and protrudes from the surface of the baffle plate 13. Figure 6The state shown is the tilted state. An arc-shaped push rod 1311 is slidably installed in the arc-shaped hole. The push rod 1311 is located between two adjacent inclined guide seats 602. One end of the push rod 1311 is fixedly connected to the side of the abutment plate 131 away from the water body. The other end of the push rod 1311 is in contact with the second insert plate of the L-shaped insert plate 111. When the push rod 1311 rotates with the abutment plate 131, it can push the second insert plate and compress the elastic telescopic rod 11, thereby causing the first insert plate to exit from the locking hole 9011 and releasing the lock on the moving part 9. At this time, the surface of the abutment plate 131 near the water body is flush with the surface of the baffle 13.

[0039] The working process of the jacking head salvage device for tunnel jacking installation is as follows: Before the salvage operation, the base 1 and guide frame 6 are installed and positioned on the shore. The angle of the guide frame 6 relative to the base 1 is adjusted to adapt to the actual shore slope, so that the lower end of the guide frame 6 extends into the water. The lifting vessel is positioned in the water above the underwater bow 3, and the towing ropes 703 of the horizontal traction assembly 2 and the vertical traction assembly 5 are connected to the bow 3 respectively. In the initial state, the locking mechanism is in the locked state, i.e. Figure 6 In the state shown, the elastic telescopic rod 11 presses the first insert of the L-shaped insert 111 into the locking hole 9011 of the moving crossbar 901, and the correction mechanism is fixed in the predetermined position of the guide 6; the abutment plate 131 maintains a tilted posture under the action of the torsion spring.

[0040] Start the winding motor 704. The horizontal traction component 2 applies a horizontal pulling force toward the shore to the machine head 3, and the vertical traction component 5 applies an upward vertical lifting force to the machine head 3. The two work together to make the machine head 3 move in the direction of the resultant force.

[0041] When the machine head 3 is pulled to the correction mechanism of the guide frame 6, the machine head 3 first contacts the abutment plates 131 on one or more baffles 13. Since the distance between adjacent baffles 13 is less than the width of the machine head 3, and the machine head 3 is usually in an inclined position at this time, under the continuous horizontal traction, the machine head 3 deflects with the contacting baffle 13 as the fulcrum until its axis is parallel to the baffle 13, that is, it is corrected to a horizontal position. At the same time, as the machine head 3 gradually comes into contact with all the baffles 13, the abutment plates 131 on each baffle 13 are squeezed by the machine head 3 and rotate into the placement groove against the torsion spring force, so that the surface of the abutment plate 131 on the side closer to the water is flush with the surface of the baffle 13. During this process, the limiting part is fastened to the top of the machine head 3 to prevent it from slipping upward. The rotation of the abutment plate 131 causes the push rod 1311 to move along the arc-shaped hole. The push rod 1311 pushes the second insert of the L-shaped insert 111, thereby compressing the elastic telescopic rod 11, so that the first insert of the L-shaped insert 111 completely exits from the locking hole 9011, releasing the lock on the moving part 9.

[0042] After the lock is released, under the continuous traction of the horizontal traction component 2, the head of the machine, which has been corrected to a horizontal posture, pushes the baffle 13 in close contact with it, thereby driving the entire moving part 9 together with the baffle 13 to slide smoothly onto the shore along the groove 12 and guide channel 121 of the inclined guide seat 602. Finally, the head of the machine is horizontally pulled to the predetermined position on the base 1 under the accompanying limitation of the baffle 13, completing the salvage.

[0043] After the salvage operation is completed, the connection between the traction rope 703 and the head of the machine 3 is released. After the head of the machine 3 is removed, the moving part 9 can be manually or through an auxiliary mechanism pushed to slide and reset underwater along the groove 12. When the moving crossbar 901 moves down and contacts the pressing slope at the end of the first insert plate of the L-shaped insert plate 111, it will push the first insert plate through the pressing slope and compress the elastic telescopic rod 11 until the locking hole 9011 on the moving crossbar 901 is aligned with the first insert plate again. The elastic force of the elastic telescopic rod 11 is released, pushing the first insert plate to re-insert into the locking hole 9011, automatically completing the re-locking of the calibration mechanism for use in the next salvage operation.

[0044] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A head-retrieval device for tunnel jacking installation, characterized in that: It includes a horizontal traction assembly (2), a vertical traction assembly (5), and a guide frame (6); The vertical traction assembly (5) is installed on the lifting vessel and is used to vertically lift the head (3). The horizontal traction assembly (2) is installed on the top of the bank slope and is used for the head of the horizontal traction machine (3). The guide frame (6) is installed on the bank slope. The guide frame (6) is provided with a correction mechanism, a locking mechanism and an unlocking mechanism. The correction mechanism is slidably installed on the guide frame (6) and is used to correct the posture of the machine head (3) and move together with the machine head (3) to the top of the bank slope. The locking mechanism is used to lock the correction mechanism. The unlocking mechanism is installed on the correction mechanism. The unlocking mechanism is released from the locking mechanism by the action of the machine head (3) during the correction process of the machine head (3).

2. The tunnel jacking installation head retrieval device according to claim 1, characterized in that: The guide frame (6) is provided with a track, which is perpendicular to the direction of the bank slope. The correction mechanism includes a baffle (13), which is slidably disposed on the track. A limiting part is provided on the top of the baffle (13) near the water body. The baffle (13) is used to correct the machine head (3) so that the axis of the machine head (3) is parallel to the direction of the bank slope. The limiting part is used to restrict the machine head (3) from disengaging from the baffle (13).

3. The tunnel jacking installation head retrieval device according to claim 2, characterized in that: The correction mechanism includes a movable crossbar (901), the baffle (13) is installed on the movable crossbar (901), the movable crossbar (901) is slidably arranged on the track, the movable crossbar (901) has a locking hole (9011), and the locking mechanism includes an elastic telescopic rod (11), the elastic telescopic rod (11) is used to cooperate with the locking hole (9011) to lock the movable crossbar (901).

4. The tunnel jacking installation head retrieval device according to claim 3, characterized in that: The unlocking mechanism includes an abutment plate (131) and a push rod (1311). The abutment plate (131) is rotatably connected to the baffle (13) via a torsion spring. The push rod (1311) is arranged on the side of the abutment plate (131) away from the water body. The push rod (1311) is used to cooperate with the elastic telescopic rod (11). Under the action of the torsion spring, the top of the abutment plate (131) tilts towards the water body. When the machine head (3) approaches the baffle (13), it squeezes the abutment plate (131), causing the abutment plate (131) to rotate. This causes the push rod (1311) to squeeze the elastic telescopic rod (11), and the elastic telescopic rod (11) releases the lock on the moving crossbar (901).

5. The tunnel jacking installation head retrieval device according to claim 4, characterized in that: The locking mechanism includes an L-shaped insert plate (111), which includes a first insert plate and a second insert plate that are perpendicular to each other. The first insert plate is parallel to the extension and retraction direction of the elastic telescopic rod (11), and the second insert plate is fixedly connected to the elastic telescopic rod (11). One end of the first insert plate is engaged with the locking hole (9011), and the elastic telescopic rod (11) is fixedly connected to the second insert plate. The push rod (1311) is engaged with the elastic telescopic rod (11) through the second insert plate.

6. The tunnel jacking installation head retrieval device according to claim 4, characterized in that: The baffle (13) has a placement groove and an arc-shaped hole. The abutment plate (131) is rotatably placed in the placement groove. When the abutment plate (131) is squeezed by the machine head (3), the surface of the abutment plate (131) on the side closest to the water is flush with the surface of the baffle (13). The arc-shaped hole is connected to the placement groove. The push rod (1311) is slidably placed in the arc-shaped hole.

7. The tunnel jacking installation head retrieval device according to claim 5, characterized in that: The movable crossbar (901) is a round bar.

8. The tunnel jacking installation head retrieval device according to claim 7, characterized in that: The end of the first insert plate is provided with a pressing slope, which is used to cooperate with the moving crossbar (901) so that the moving crossbar (901) presses the elastic telescopic rod (11) through the first insert plate.

9. The tunnel jacking installation head retrieval device according to any one of claims 1 to 8, characterized in that: An auxiliary roller (8) is rotatably mounted on the guide frame (6), and the rotation axis of the auxiliary roller (8) is parallel to the direction of the bank slope.

10. The tunnel jacking installation head retrieval device according to any one of claims 1 to 8, characterized in that: The vertical traction assembly (5) includes a U-shaped seat (7), on which a winding motor (704) is fixedly mounted, and a drum (702) is rotatably mounted on the U-shaped seat (7). The output shaft of the winding motor (704) is fixedly connected to the rotating shaft of the drum (702). A traction rope (703) is wound on the drum (702), and one end of the traction rope (703) is used to connect to the machine head (3).

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