Hard rock pipeline top shield machine and construction technology thereof

Abstract

The invention discloses a hard rock pipeline shield jacking machine and a construction technology thereof, and relates to the field of pipeline shield jacking machines, the hard rock pipeline shield jacking machine comprises a pipe jacking machine body and a shield tail shield, a propelling oil cylinder is fixedly installed between the pipe jacking machine body and the shield tail shield, and a cutter head is installed on one side of the shield tail shield. A synchronous belt is used for driving a second rotating rod to rotate, when a cam at the top of the second rotating rod exerts acting force on a pushing plate to enable a movable frame to start to slide, then the movable frame is controlled to swing through the synergistic effect of a driving rod and a protruding plate, and through the series of operation, movement of a movable tool bit is accurately controlled; under the synergistic effect of the cam and a series of transmission mechanisms, the movable cutter head can swing back and forth in a circular arc shape while the cutter head rotates, so that the cutting depth and breadth are increased, the shield tunneling efficiency is improved, and the adaptability of the top shield machine to different complex geological conditions is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline top shield machines, in particular to a hard rock pipeline top shield machine and a construction process thereof. Background Art

[0002] The bedrock fissure water in the tunnel section mainly exists at the foot of the mountain and the low-lying areas of the valley, and its water content is relatively rich. When excavating the tunnel, a top shield machine will be used. The top shield machine is a device that combines pipe jacking technology and shield technology. According to the engineering route, the top shield method is used to start excavation and advancement. When the jacking force is used to the limit or the construction reaches the curved section, it is switched to shield mode to continue construction until it is penetrated.

[0003] For example, the "shield machine and its shield machine cutterhead" with publication number: CN110259469B, includes a cutterhead frame, a cutterhead panel is provided on the front working surface of the cutterhead frame, and the cutterhead panel is provided with functional through holes connecting the inside and outside of the cutterhead frame, and the functional through holes are used for the extension and retraction of the functional components therein relative to the cutterhead frame; the cutterhead frame is connected to a switching device corresponding to the functional through holes, and the switching device includes a gate driving member and a gate connected to the gate driving member, and the gate driving member can drive the gate to move to open the corresponding functional through holes or seal the corresponding functional through holes after the functional components are retracted to the rear side of the gate.

[0004] However, in the prior art, the existing top shield machine shield cutter head mainly relies on the cutting force generated by following the rotation of the cutter disc during excavation, and the excavation method is relatively single, resulting in limited excavation speed in complex underground environments. In particular, when encountering complex geological conditions, such as many stratum faults, abundant groundwater or high geological intensity, the construction difficulty will increase significantly. In addition, during long-distance excavation, the geological conditions are changeable, and problems such as gravel deposition and stratum convergence will be encountered, which will cause abnormal increase in thrust, easily causing the shield body and pipe segments to lock or jam. Summary of the invention

[0005] The object of the present invention is to provide a hard rock pipeline top shield machine and a construction process thereof, so as to solve the problem that the excavation method is relatively single and the excavation speed is limited in a complex underground environment proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hard rock pipeline shield jacking machine, comprising a jacking machine body and a shield tail shield, a propulsion cylinder is fixedly installed between the jacking machine body and the shield tail shield, a cutter disc is installed on one side of the shield tail shield, a mounting frame is fixedly connected to the inner side of the cutter disc, a main cutter head is installed on the inner side of the mounting frame, a support frame is fixedly connected to the outer side of the mounting frame, a secondary cutter head is installed inside the support frame, a side cutter head is installed on the outer edge of the cutter disc, a movable mechanism is installed on the mounting frame, and a movable cutter head is connected to one side of the movable mechanism;

[0007] The cam is connected with the first rotating shaft, and the outer wall of the cam is connected with the driving wheel, and the top end of the cam is connected with the driving wheel, and the top end of the cam is connected with the driving wheel, and the top end of the cam is connected with the driving wheel, the bottom end of the cam is connected with the driving wheel, and the top end of the cam is connected with the driving wheel, the bottom end of the cam is connected with the driving wheel, the bottom end of the cam is connected with the driving wheel, the bottom end of the cam is connected with the driving wheel, the bottom end of the cam is connected with the driving wheel

[0008] Preferably, a guide groove is provided on the surface of the main support, a guide block is slidably connected inside the guide groove, and the top of the guide block is fixedly connected to the bottom of the push plate.

[0009] Preferably, the mounting plate is fixedly connected to the mounting frame, the bottom of the second rotating rod is rotatably connected to the mounting plate, the surface of the driving wheel is meshed with a synchronous belt, one end of the synchronous belt is meshed with the synchronous wheel, a driving motor is installed at the bottom of the mounting plate, the output end of the driving motor is fixedly connected to the second rotating rod, one end of the third rotating rod is fixedly connected to a driven bevel gear, and the driven bevel gear is meshed with the driving bevel gear.

[0010] Preferably, a first spring is arranged between the two first sliding rods, one end of the first spring extends to the inner cavity of the movable frame, a limiting rod is installed inside the first spring, and one end of the limiting rod is fixedly connected to the connecting plate.

[0011] Preferably, the side wall of the main support is fixedly connected to a slide rail, the surface of the slide rail is slidably connected to a first sliding block, the top of the first sliding block is fixedly connected to the bottom of the movable frame, one end of the movable frame is symmetrically fixedly connected to two fixing rods, and an auxiliary mechanism is installed between the two fixing rods.

[0012] Preferably, the auxiliary mechanism includes a shell and a rotating sleeve, a coupling rod is fixedly connected to the inner surface of the rotating sleeve, one end of the coupling rod is fixedly connected to the third rotating rod, and both ends of the coupling rod are rotatably connected to the inner wall of the shell, and a driving groove is opened on the outer surface of the rotating sleeve.

[0013] Preferably, second sliding rods are provided on both sides of the rotating sleeve, both ends of the two second sliding rods are fixedly connected to the inner wall of the shell, a second spring is sleeved on the surface of the shell, and a second sliding block is slidably connected to the surface of the second sliding rod, and the second sliding block is slidably connected to the rotating sleeve.

[0014] Preferably, a moving block is fixedly connected to the inner side of the rotating sleeve, the moving block is slidably connected to the driving groove, and the second spring is located at one side of the second sliding block.

[0015] Preferably, a push rod is fixedly connected to one side of the second sliding block, one end of the push rod passes through the shell, one end of the shell is fixedly connected to an assembly plate, the assembly plate is fixedly connected to the outer wall of the movable cutter head, the bottom of the movable cutter head is slidably connected to a track, and the bottom of the track is fixedly connected to the mounting frame.

[0016] A construction process of a hard rock pipeline top shield machine comprises the following steps:

[0017] Step 1: Pipe jacking is carried out by using the oil cylinder installed in the working well and the relay room installed in the middle of the pipe section to provide the equipment with forward power. Initially, the rear wall of the working well is used as the reaction wall to push the pipe section and the machine head forward together. When the jacking force reaches 80% of the allowable jacking force of the pipe section, the relay room is used for segmented jacking.

[0018] Step 2: Shield advancement: Use the installed pipe segments and assembled shield segments as counter supports to advance the shield. During the advancement, the cutter head will rotate and the thrust cylinder will start to operate, so that the shield tail shield and cutter head will also rotate together with the main cutter head, side cutter head and auxiliary cutter head on the surface during the forward movement, thus completing the tunnel excavation.

[0019] Step 3: The movable cutter head works. The driving motor can rotate the second rotating rod. In this process, the synchronous belt and the synchronous wheel are used to drive the first rotating rod to rotate together, so that the cam starts to push the push plate. Under the coordinated action of the first spring, the movable frame starts to move together, so that the movable frame reciprocates left and right on the surface of the first slide bar, and the movable frame can be controlled to swing left and right, so as to control the movable cutter head to swing back and forth in an arc. On the basis of the original cutter head, a flexible movable cutter head is added, so as to further improve the shield tunneling effect;

[0020] Step 4, telescopic operation. During the swinging operation of the movable cutter head, the coupling rod can be used to drive the rotating sleeve to rotate together, so that the rotating sleeve uses the driving groove on the surface to cooperate with the moving block, so that the second sliding block slides on the surface of the second sliding rod and the rotating sleeve, and cooperates with the second spring to achieve the purpose of reciprocating telescopic operation, thereby increasing the complexity of the movable cutter head motion estimation to achieve the purpose of improving the excavation effect.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the present invention, the second rotating rod is driven to rotate by a driving motor, and then the second rotating rod is driven to rotate by a synchronous belt. When the cam on the top of the second rotating rod applies a force to the push plate to make the movable frame start to slide, the movable frame is controlled to swing through the coordinated action of the driving rod and the convex plate. This series of operations accurately controls the movement of the movable cutter head. Under the coordinated action of the cam and a series of transmission mechanisms, the movable cutter head can swing back and forth in a circular arc while the cutter disc rotates, thereby increasing the depth and breadth of cutting, which not only improves the efficiency of shield excavation, but also enhances the adaptability of the top shield machine to different complex geological conditions.

[0023] 2. In the present invention, the push plate and the movable frame are caused to reciprocate through the circular motion of the cam, and the resetting is achieved through the telescopic effect of the first spring. The limit rod ensures the stable elasticity of the spring, making the resetting action more rapid and accurate. At the same time, the arc-shaped swing of the movable frame is kept stable through the sliding mechanism of the slide rail and the first sliding block, ensuring that the movable cutter head can stably change its position. This swinging action adds a flexible working mode to the movable cutter head on the basis of the original cutter head, which not only improves the cutting depth and width, but also enhances the adaptability of the top shield machine to different geological conditions.

[0024] 3. In the present invention, when the rotating casing is driven to rotate by the coupling rod, its unique driving groove design enables the moving block to be gradually pushed to the periphery in the spiral stage, compressing the second spring to store energy. After entering the linear stage, the second spring quickly releases energy to push the movable cutter head to reciprocate, which not only increases the cutting depth and breadth, but also further optimizes the shield effect by adjusting the movement frequency and amplitude, and improves the excavation efficiency. This not only enhances the flexibility and adaptability of the top shield machine, but also enables it to construct efficiently under complex geological conditions, significantly improving the construction efficiency and quality of underground projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of a hard rock pipeline top shield machine of the present invention;

[0026] Figure 2 This is a schematic diagram of the cutter head structure of a hard rock pipeline top shield machine of the present invention;

[0027] Figure 3 It is a partial structural schematic diagram of a hard rock pipeline top shield machine of the present invention;

[0028] Figure 4 It is a schematic diagram of the disassembled structure of the movable mechanism in a hard rock pipeline top shield machine of the present invention;

[0029] Figure 5It is a top view structural schematic diagram of a movable mechanism in a hard rock pipeline top shield machine of the present invention;

[0030] Figure 6 It is a partial structural schematic diagram of a movable mechanism in a hard rock pipeline top shield machine of the present invention;

[0031] Figure 7 It is a schematic diagram of the connection relationship between the movable frame and the shell of a hard rock pipeline top shield machine of the present invention;

[0032] Figure 8 This is a schematic diagram of the internal structure of a shell of a hard rock pipeline top shield machine of the present invention;

[0033] Fig. 9 It is a schematic diagram of the disassembled structure of the auxiliary mechanism in a hard rock pipeline top shield machine of the present invention;

[0034] Fig.10 The present invention is a flow chart of a construction process of a hard rock pipeline top shield machine.

[0035] In the figure: 1, pipe jacking machine body; 2, propulsion cylinder; 3, shield tail shield; 4, cutter head; 41, side cutter head; 42, mounting frame; 43, main cutter head; 44, support frame; 45, auxiliary cutter head; 5, movable cutter head; 51, track; 6, movable mechanism; 61, mounting plate; 62, first rotating rod; 621, synchronous wheel; 622, cam; 63, second rotating rod; 631, active bevel gear; 632, active wheel; 64, synchronous belt; 65, moving frame; 651, push plate; 652, drive rod; 653, guide block; 66, movable frame; 661, cam Plate; 662, movable groove; 663, fixed rod; 67, main bracket; 671, first slide bar; 672, connecting plate; 673, first spring; 674, limit rod; 675, guide groove; 68, third rotating rod; 681, driven bevel gear; 69, slide rail; 691, first sliding block; 7, auxiliary mechanism; 71, shell; 72, rotating sleeve; 721, driving groove; 73, coupling rod; 74, second sliding block; 741, moving block; 75, push rod; 751, assembly plate; 76, second slide bar; 77, second spring; 8, driving motor. DETAILED DESCRIPTION

[0036] 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 implementation regulations described 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.

[0037] Embodiment 1

[0038] Reference Figure 1-6 As shown: a hard rock pipeline shield jacking machine, including a jacking machine body 1 and a shield tail shield 3, a propulsion cylinder 2 is fixedly installed between the jacking machine body 1 and the shield tail shield 3, a cutter disc 4 is installed on one side of the shield tail shield 3, a mounting frame 42 is fixedly connected to the inner side of the cutter disc 4, a main cutter head 43 is installed on the inner side of the mounting frame 42, a support frame 44 is fixedly connected to the outer side of the mounting frame 42, an auxiliary cutter head 45 is installed inside the support frame 44, a side cutter head 41 is installed on the outer edge of the cutter disc 4, a movable mechanism 6 is installed on the mounting frame 42, and a movable cutter head 5 is connected to one side of the movable mechanism 6;

[0039] The movable mechanism 6 includes a mounting plate 61, a first rotating rod 62 and a movable frame 66. The top of the mounting plate 61 is fixedly connected to a main frame 67. Two first sliding rods 671 are fixedly connected to the inner side of the main frame 67. One end of the two first sliding rods 671 is fixedly connected to a connecting plate 672. A moving frame 65 is slidably connected to the surface of the first sliding rod 671. A push plate 651 is fixedly connected to one end of the moving frame 65, and a driving rod 652 is fixedly connected to the inner side of the other end of the moving frame 65. A synchronous wheel 621 is fixedly connected to the bottom end of the first rotating rod 62. A cam 622 is fixedly connected to the top of the synchronous wheel 621. The first rotating rod 62 is connected to the main frame 67. The bracket 67 is rotatably connected, the cam 622 abuts against the push plate 651, one end of the main bracket 67 is rotatably connected to the second rotating rod 63, the outer wall of the bottom end of the second rotating rod 63 is fixedly connected to the driving wheel 632, and the top of the second rotating rod 63 is fixedly connected to the driving bevel gear 631, the bottom of the movable frame 66 is rotatably connected to the main bracket 67, and the outer wall of the bottom end of the movable frame 66 is fixedly connected to the convex plate 661, the inner side of the convex plate 661 is provided with a movable groove 662, one end of the convex plate 661 extends to the inside of the moving frame 65, the movable groove 662 is movably connected to the driving rod 652, and the top of the movable frame 66 is rotatably connected to the third rotating rod 68.

[0040] In this embodiment, the driving motor 8 can be used to drive the second rotating rod 63 to rotate, thereby driving the driving wheel 632 to rotate together. As the driving wheel 632 rotates, the first rotating rod 62 is driven to rotate through the synchronous belt 64. In this process, the second rotating rod 63 also drives the driving bevel gear 631 on the top thereof to rotate, and the driving bevel gear 631 meshes with the driven bevel gear 681, so that the third rotating rod 68 starts to rotate.

[0041] When the first rotating rod 62 rotates, the cam 622 performs a circular motion. During the circular motion of the cam 622, it applies a force to the push plate 651, and the push plate 651 further pushes the moving frame 65 to move. When the moving frame 65 slides, it compresses the first spring 673. As the moving frame 65 slides along the first sliding rod 671, a force is applied to the convex plate 661 through the driving rod 652. At the same time, the driving rod 652 slides in the movable groove 662, driving the convex plate 661 and the movable frame 66 to move, thereby causing the movable frame 66 to start rotating. Due to the circular motion of the cam 622, when the movable groove 662 no longer applies a force to the push plate 651, the first spring 673 will return to its original state, pushing the push plate 651 to reset.

[0042] When push plate 651 and mobile frame 65 are reset, they drive movable frame 66 to reset by driving rod 652 and convex plate 661, and movable frame 66 is rotated. In this process, movable frame 66 will swing back and forth for 90 degrees.

[0043] The swing of the movable frame 66 will indirectly drive the movable cutter head 5 to move, so that when the cutter head 4 rotates, multiple movable cutter heads 5 can be controlled to work at the same time. The purpose is to control the movable cutter head 5 to swing back and forth in an arc, and add a flexible movable cutter head 5 on the basis of the original cutter head, so as to further improve the shield tunneling effect.

[0044] Embodiment 2

[0045] Figure 4-6 As shown, a guide groove 675 is provided on the surface of the main support 67, and a guide block 653 is slidably connected inside the guide groove 675, and the top of the guide block 653 is fixedly connected to the bottom of the push plate 651. The mounting plate 61 is fixedly connected to the mounting frame 42, the bottom of the second rotating rod 63 is rotatably connected to the mounting plate 61, the surface of the driving wheel 632 is meshed with a synchronous belt 64, and one end of the synchronous belt 64 is meshed with the synchronous wheel 621. A driving motor 8 is installed at the bottom of the mounting plate 61, and the output end of the driving motor 8 is fixedly connected to the second rotating rod 63. One end of the third rotating rod 68 is fixedly connected to a driven bevel gear 681, and the driven bevel gear 681 is meshed with the driving bevel gear 631. A first spring 673 is arranged between the two first sliding rods 671, one end of the first spring 673 extends to the inner cavity of the moving frame 65, and a limiting rod 674 is installed inside the first spring 673, and one end of the limiting rod 674 is fixedly connected to the connecting plate 672. The side wall of the main support 67 is fixedly connected to a slide rail 69, and a first sliding block 691 is slidably connected to the surface of the slide rail 69. The top of the first sliding block 691 is fixedly connected to the bottom of the movable frame 66. Two fixed rods 663 are symmetrically fixedly connected to one end of the movable frame 66, and an auxiliary mechanism 7 is installed between the two fixed rods 663.

[0046] In this embodiment, when the moving frame 65 moves, it compresses the first spring 673. This compression process will store the first spring 673 inside the moving frame 65. The existence of the limit rod 674 is to ensure that the first spring 673 can still maintain a stable elastic function after multiple expansions and contractions. In this way, when the circular motion of the cam 622 causes the force to disappear, the first spring 673 can quickly return to its original state, pushing the push plate 651 and the moving frame 65 to reset.

[0047] When the push plate 651 and the moving frame 65 are reset, they drive the movable frame 66 to reset through the driving rod 652 and the convex plate 661. In this process, the movable frame 66 begins to swing in an arc. In order to ensure the stability of the movable frame 66 during the swinging process, the first sliding block 691 at the bottom thereof slides on the surface of the slide rail 69. This sliding mechanism ensures that the movable frame 66 can stably drive the movable cutter head 5 to change position during multiple swinging processes.

[0048] Finally, the movable cutter head 5 can also swing back and forth in an arc shape while the cutter disc 4 rotates. This swinging action adds a flexible working mode to the movable cutter head 5 on the basis of the original cutter head, thereby further improving the effect of shield tunneling.

[0049] Embodiment 3

[0050] according to Figure 7-9 As shown, the auxiliary mechanism 7 includes a housing 71 and a rotating sleeve 72. A coupling rod 73 is fixedly connected to the inner surface of the rotating sleeve 72. One end of the coupling rod 73 is fixedly connected to the third rotating rod 68, and both ends of the coupling rod 73 are rotatably connected to the inner wall of the housing 71. A driving groove 721 is provided on the outer surface of the rotating sleeve 72. Second sliding rods 76 are arranged on both sides of the rotating sleeve 72. Both ends of the two second sliding rods 76 are fixedly connected to the inner wall of the housing 71. A second spring 77 is sleeved on the surface of the housing 71. A second sliding block 74 is slidably connected to the surface of the second sliding rod 76. The second sliding block 74 is slidably connected to the rotating sleeve 72. A moving block 741 is fixedly connected to the inner side of the rotating sleeve 72. The moving block 741 is slidably connected to the driving groove 721. The second spring 77 is located on one side of the second sliding block 74. A push rod 75 is fixedly connected to one side of the second sliding block 74, one end of the push rod 75 passes through the shell 71, one end of the shell 71 is fixedly connected to the assembly plate 751, the assembly plate 751 is fixedly connected to the outer wall of the movable cutter head 5, the bottom of the movable cutter head 5 is slidably connected to the track 51, and the bottom of the track 51 is fixedly connected to the mounting frame 42.

[0051] In this embodiment, when the third rotating rod 68 starts to rotate under the drive of the driving motor 8, it will synchronously drive the coupling rod 73 to rotate. The rotation of the coupling rod 73 drives the rotating sleeve 72 to rotate. The surface of the rotating sleeve 72 is designed with a driving groove 721. When the moving block 741 slides in the driving groove 721, it will simultaneously drive the second sliding block 74 to move along the surface of the second sliding rod 76. The second sliding block 74 squeezes the second spring 77 on the surface of the second sliding rod 76, causing it to be gradually compressed, thereby storing energy.

[0052] As the rotating sleeve 72 continues to rotate, its driving groove 721 is divided into a spiral stage and a linear stage. When the spiral stage of the driving groove 721 is touched by the moving block 741, due to the spiral shape of the driving groove, the moving block 741 is gradually pushed to the periphery, further squeezing the second spring 77. However, when the linear stage of the driving groove 721 is touched by the moving block 741, due to the straight shape of the driving groove, the moving block 741 is no longer limited. At this time, the second spring 77 that was previously compressed quickly releases energy, pushing the second sliding block 74 to quickly return along the second sliding rod 76.

[0053] The reset action of the second sliding block 74 is transmitted to the assembly plate 751 through the push rod 75, so that the assembly plate 751 and the movable cutter head 5 connected thereto perform multiple reciprocating motions. This reciprocating motion not only enables the movable cutter head 5 to extend out of the cutter disc 4 during its rotation, thereby increasing the depth and breadth of cutting, but also further optimizes the shield effect and improves the excavation efficiency by adjusting the frequency and amplitude of the reciprocating motion. This not only increases the flexibility and adaptability of the top shield machine, but also supports construction under complex geological conditions.

[0054] Embodiment 4

[0055] according to Fig.10 As shown, a construction process of a hard rock pipeline top shield machine includes the following steps:

[0056] 1) Pipe jacking: the oil cylinder installed in the working well and the relay room installed in the middle of the pipe section are used to provide the equipment with forward power. Initially, the rear wall of the working well is used as the reaction wall to push the pipe section and the machine head forward together. When the jacking force reaches 80% of the allowable jacking force of the pipe section, the relay room is used for segmented jacking;

[0057] 2) Shield advancement: the installed pipe segments and assembled shield segments are used as counter supports for shield advancement. During the advancement, the cutterhead 4 will rotate, and the thrust cylinder 2 will start to operate, so that the shield tail shield 3 and the cutterhead 4 will also rotate together with the main cutter head 43, the side cutter head 41 and the auxiliary cutter head 45 on the surface during the forward movement, thereby completing the tunnel excavation;

[0058] 3) The movable cutter head 5 works, and the second rotating rod 63 is rotated by the driving motor 8. In this process, the synchronous belt 64 and the synchronous wheel 621 are used to drive the first rotating rod 62 to rotate together, so that the cam 622 starts to push the pushing plate 651, and under the coordinated action of the first spring 673, the moving frame 65 starts to move together, so that the moving frame 65 reciprocates left and right on the surface of the first slide bar 671, and can control the movable frame 66 to swing left and right, so as to control the movable cutter head 5 to swing back and forth in an arc. On the basis of the original cutter heads, a flexible movable cutter head 5 is added, so as to further improve the shield tunneling effect;

[0059] 4) Telescopic operation. During the swinging operation of the movable cutter head 5, the coupling rod 73 can be used to drive the rotating sleeve 72 to rotate together, so that the rotating sleeve 72 uses the driving groove 721 on the surface to cooperate with the moving block 741, so that the second sliding block 74 slides on the second sliding rod 76 and the surface of the rotating sleeve 72, and cooperates with the second spring 77 to achieve the purpose of reciprocating telescopic operation, thereby increasing the complexity of the movement estimation of the movable cutter head 5 to achieve the purpose of improving the excavation effect.

[0060] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hard rock pipeline jacking machine, comprising a jacking machine body (1) and a shield tail shield (3), wherein a propulsion cylinder (2) is fixedly installed between the jacking machine body (1) and the shield tail shield (3), a cutter disc (4) is installed on one side of the shield tail shield (3), a mounting frame (42) is fixedly connected to the inner side of the cutter disc (4), a main cutter head (43) is installed on the inner side of the mounting frame (42), a support frame (44) is fixedly connected to the outer side of the mounting frame (42), a secondary cutter head (45) is installed inside the support frame (44), and a side cutter head (41) is installed on the outer edge of the cutter disc (4); characterized in that: A movable mechanism (6) is installed on the mounting frame (42), and a movable cutter head (5) is connected to one side of the movable mechanism (6); The movable mechanism (6) comprises a mounting plate (61), a first rotating rod (62) and a movable frame (66); the top of the mounting plate (61) is fixedly connected to a main frame (67); the inner side of the main frame (67) is fixedly connected to two first sliding rods (671); one end of the two first sliding rods (671) is fixedly connected to a connecting plate (672); the surface of the first sliding rod (671) is slidably connected to a movable frame (65); one end of the movable frame (65) is fixedly connected to a pushing plate (651); the inner side of the other end of the movable frame (65) is fixedly connected to a driving rod (652); the bottom end of the first rotating rod (62) is fixedly connected to a synchronous wheel (621); the top of the synchronous wheel (621) is fixedly connected to a cam (622); the first rotating rod (62) is connected to the main frame The bracket (67) is rotatably connected, the cam (622) is in contact with the push plate (651), one end of the main bracket (67) is rotatably connected with the second rotating rod (63), the outer wall of the bottom end of the second rotating rod (63) is fixedly connected with a driving wheel (632), and the top end of the second rotating rod (63) is fixedly connected with a driving bevel gear (631), the bottom of the movable frame (66) is rotatably connected with the main bracket (67), and the outer wall of the bottom end of the movable frame (66) is fixedly connected with a convex plate (661), the inner side of the convex plate (661) is provided with a movable groove (662), one end of the convex plate (661) extends into the interior of the movable frame (65), the movable groove (662) is movably connected with the driving rod (652), and the top end of the movable frame (66) is rotatably connected with a third rotating rod (68).

2. A hard rock pipeline top shield machine according to claim 1, characterized in that: A guide groove (675) is provided on the surface of the main frame (67), a guide block (653) is slidably connected inside the guide groove (675), and the top of the guide block (653) is fixedly connected to the bottom of the push plate (651).

3. A hard rock pipeline top shield machine according to claim 2, characterized in that: The mounting plate (61) is fixedly connected to the mounting frame (42); the bottom of the second rotating rod (63) is rotatably connected to the mounting plate (61); a synchronous belt (64) is meshedly connected to the surface of the driving wheel (632); one end of the synchronous belt (64) is meshedly connected to the synchronous wheel (621); a driving motor (8) is installed at the bottom of the mounting plate (61); the output end of the driving motor (8) is fixedly connected to the second rotating rod (63); one end of the third rotating rod (68) is fixedly connected to a driven bevel gear (681); and the driven bevel gear (681) is meshedly connected to the driving bevel gear (631).

4. A hard rock pipeline top shield machine according to claim 3, characterized in that: A first spring (673) is arranged between the two first sliding rods (671), one end of the first spring (673) extends to the inner cavity of the moving frame (65), a limiting rod (674) is installed inside the first spring (673), and one end of the limiting rod (674) is fixedly connected to the connecting plate (672).

5. A hard rock pipeline top shield machine according to claim 4, characterized in that: The side wall of the main support (67) is fixedly connected to a slide rail (69), and the surface of the slide rail (69) is slidably connected to a first slide block (691), and the top of the first slide block (691) is fixedly connected to the bottom of the movable frame (66), and one end of the movable frame (66) is symmetrically fixedly connected to two fixed rods (663), and an auxiliary mechanism (7) is installed between the two fixed rods (663).

6. A hard rock pipeline top shield machine according to claim 5, characterized in that: The auxiliary mechanism (7) comprises a shell (71) and a rotating sleeve (72); a coupling rod (73) is fixedly connected to the inner surface of the rotating sleeve (72); one end of the coupling rod (73) is fixedly connected to the third rotating rod (68), and both ends of the coupling rod (73) are rotatably connected to the inner wall of the shell (71); and a driving groove (721) is provided on the outer surface of the rotating sleeve (72).

7. A hard rock pipeline top shield machine according to claim 6, characterized in that: Second sliding rods (76) are provided on both sides of the rotating sleeve (72), and both ends of the two second sliding rods (76) are fixedly connected to the inner wall of the shell (71). A second spring (77) is sleeved on the surface of the shell (71), and a second sliding block (74) is slidably connected to the surface of the second sliding rod (76), and the second sliding block (74) is slidably connected to the rotating sleeve (72).

8. A hard rock pipeline top shield machine according to claim 7, characterized in that: A moving block (741) is fixedly connected to the inner side of the rotating sleeve (72), the moving block (741) is slidably connected to the driving groove (721), and the second spring (77) is located on one side of the second sliding block (74).

9. A hard rock pipeline top shield machine according to claim 8, characterized in that: A push rod (75) is fixedly connected to one side of the second sliding block (74), one end of the push rod (75) passes through the shell (71), one end of the shell (71) is fixedly connected to an assembly plate (751), the assembly plate (751) is fixedly connected to the outer wall of the movable cutter head (5), the bottom of the movable cutter head (5) is slidably connected to a track (51), and the bottom of the track (51) is fixedly connected to the mounting frame (42).

10. A construction process for a hard rock pipeline top shield machine, characterized in that: A hard rock pipeline top shield machine according to any one of claims 1 to 9 is used, comprising the following steps: S1, pipe jacking, using the oil cylinder installed in the working well and the relay room installed in the middle of the pipe section to provide the equipment with forward power. Initially, the rear wall of the working well is used as the reaction wall to push the pipe section and the machine head forward together. When the jacking force reaches 80% of the allowable jacking force of the pipe section, the relay room is used for segmented jacking; S2, shield advancement, using the installed pipe segments and assembled shield segments as counter supports to advance the shield. During the advancement, the cutterhead (4) will rotate, and the thrust cylinder (2) will start to operate, so that the shield tail shield (3) and the cutterhead (4) will also rotate together with the main cutter head (43), the side cutter head (41) and the auxiliary cutter head (45) on the surface during the forward movement, thereby completing the tunnel excavation; S3, the movable cutter head (5) works, and the second rotating rod (63) can be rotated by using the driving motor (8). In this process, the synchronous belt (64) and the synchronous wheel (621) are used to drive the first rotating rod (62) to rotate together, so that the cam (622) starts to push the pushing plate (651), and under the coordinated action of the first spring (673), starts to drive the moving frame (65) to move together, so that the moving frame (65) reciprocates left and right on the surface of the first sliding rod (671), and can control the movable frame (66) to swing left and right, so as to control the movable cutter head (5) to swing back and forth in an arc. On the basis of the original cutter heads, a flexible movable cutter head (5) is added, so that the shield tunneling effect can be further improved; S4, telescopic operation, during the swinging operation of the movable cutter head (5), the coupling rod (73) can be used to drive the rotating sleeve (72) to rotate together, so that the rotating sleeve (72) uses the driving groove (721) on the surface to cooperate with the moving block (741), so that the second sliding block (74) can slide on the second sliding rod (76) and the surface of the rotating sleeve (72), and the purpose of reciprocating telescopic operation can be achieved in cooperation with the second spring (77), thereby increasing the complexity of the movement estimation of the movable cutter head (5) to achieve the purpose of improving the excavation effect.

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