Self-adapting telescopic pipe jacking machine head structure applied to pipe jacking construction

Abstract

The application discloses a self-adaptive telescopic pipe jacking head structure applied to pipe jacking construction and relates to the technical field of municipal construction. The application is characterized by the following: the pipe jacking head structure is arranged in the working well frame and is driven by the main oil cylinder; the application adopts the modularized cooperative driving and intermittent stepping pushing mechanism, takes the main oil cylinder as the core power, drives the synchronous translation of the jacking disc and the pushing pipe ring, ensures the stability of the axis, controls the axial rotation moving assembly through the auxiliary oil cylinder and the connecting rod structure to realize the bidirectional pushing and retraction, uses the reciprocating translation digging action to improve the pipe jacking efficiency when adapting to the pipe jacking construction of the complex stratum, can still ensure the consistency of the jacking axis and realizes the consistency in the bidirectional pipe jacking construction process, and drives the fixed-angle connecting rod through the bidirectional cooperation of the plate ring structure to complete the protrusion and recess type reciprocating movement of the digging mechanism, so that the targeted pressure regulating digging action of different strata is realized.

Description

Technical Field

[0001] This invention relates to the field of municipal construction technology, specifically to an adaptive telescopic pipe jacking head structure used in pipe jacking construction. Background Technology

[0002] Pipe jacking is one of the common construction methods for drilling underground tunnels in soft soil strata. This construction method has the characteristics of fast construction speed and strong economy. Therefore, it is widely used in municipal underground tunnel construction. It does not require the excavation of the surface layer and can cross highways, railways, rivers, surface buildings, underground structures and various underground pipelines.

[0003] Pipe jacking construction utilizes the thrust of the main jacking cylinder and intermediate stations between pipelines to push the tool pipe or tunneling machine through the soil layer from the working shaft to the receiving shaft and lift it out. At the same time, the pipeline following the tool pipe or tunneling machine is buried between the two shafts, in order to realize the construction method of trenchless laying of underground pipelines.

[0004] In some complex municipal engineering scenarios, such as pipe jacking, it is necessary to lay pipes from the middle point in two directions or when encountering insurmountable underground obstacles. The bidirectional pipe jacking technology has emerged to address this. The core of this technology is the ability to jack in two opposite directions. However, existing technologies have many bottlenecks. Referring to the pipe jacking equipment with patent publication number CN111396076B, it requires two independent pipe jacking head systems to achieve bidirectional jacking. This not only greatly increases the occupation of on-site working space but also requires debugging and maintenance of two sets of pipe jacking head systems. If any system experiences axial deviation, it will affect the accuracy of underground tunnel construction. For working shafts with limited end face dimensions or special shapes, the adaptability is poor and the accuracy is difficult to guarantee.

[0005] Therefore, this application proposes a solution. Summary of the Invention

[0006] The purpose of this invention is to provide an adaptive telescopic pipe jacking head structure for use in pipe jacking construction, in order to solve the problem of inconsistent bidirectional jacking axes caused by the rotation of the jacking head during bidirectional pipe jacking construction.

[0007] The objective of this invention can be achieved through the following technical solution: an adaptive telescopic pipe jacking head structure applied in pipe jacking construction, comprising a pipe jacking head structure set in the working well frame and driven by a main hydraulic cylinder, the pipe jacking head structure comprising a synchronously translating jacking plate and a pusher ring, the jacking plate having an axial rotation component inside, and the front end of the axial rotation component being connected to a tunneling mechanism that fits against the front side of the jacking plate;

[0008] The axial rotation assembly includes a motor and an auxiliary hydraulic cylinder. The output end of the motor is connected to the tunneling mechanism through a linkage structure. The motor and the auxiliary hydraulic cylinder together control the bidirectional pushing and retracting action of the tunneling mechanism through the linkage structure.

[0009] The tunneling mechanism includes a separation plate, a cylinder, and a telescopic wing plate connected to the output end of the auxiliary cylinder. The telescopic wing plate is located outside the separation plate and moves independently in the radial direction.

[0010] Further configured as follows: the linkage structure includes intersecting fixed-angle linkages, the front end of the fixed-angle linkage is connected to a pin plate connected to the separation plate, the output end of the auxiliary cylinder is connected to an adjusting rod, and the adjusting rod is sleeved with a spaced-out rear pull ring and a front push ring.

[0011] The adjustment rod is further configured such that a rear pull plate and a front push plate are respectively sleeved on the outside of the rear pull ring and the front push ring, and the outer periphery of the rear pull plate and the front push plate respectively contact the middle of the front and rear sections of the inner side of the fixed angle connecting rod.

[0012] The main cylinder is further configured as follows: the main cylinder is a dual-cylinder structure and is connected to an intermittent push rod. The intermittent push rod has a slot and a push plate is fitted over it. The intermittent push rod passes through the push plate and abuts against the top plate.

[0013] The following configuration is further provided: a bottom frame is provided inside the working well frame, a sliding rod is installed on the bottom frame, and a sliding block connected to the push plate is slidably provided on the sliding rod.

[0014] The sliding rod is further configured such that a fixed support plate for supporting the jacking machine head structure is fixedly installed at its front end, and the concave side of the fixed support plate is in contact with the outer ring side of the jacking machine head structure.

[0015] A further configuration is provided: a retaining ring is intermittently inserted into the slot on the intermittent push rod for intermittent push-and-retract control of the push plate.

[0016] A further configuration is provided: a load-bearing steel seat is provided on the outer side of the bottom frame and the sliding rod near the main oil cylinder, forming a drive backrest for the main oil cylinder.

[0017] The method is further configured such that the front end of the intermittent push rod is a conical structure, and the rear side of the push tube ring is provided with a push groove that matches the conical structure at the front end of each intermittent push rod.

[0018] The present invention has the following beneficial effects:

[0019] 1. This invention addresses the problem of inconsistent jacking axes caused by the turning of the jacking head during bidirectional pipe jacking construction. It improves the structure of the jacking head in the pipe jacking machine by adopting a modular collaborative drive and intermittent step-by-step propulsion mechanism. The main hydraulic cylinder serves as the core power source, driving the synchronous translation of the jacking disc and the pusher ring to ensure axis stability. The auxiliary hydraulic cylinder and connecting rod structure control the axial rotation component to achieve bidirectional pushing and retracting. When adapting to pipe jacking construction in complex geological formations, the reciprocating translational tunneling action improves jacking efficiency. When applied to bidirectional pipe jacking construction, it still ensures consistent jacking axes.

[0020] 2. The present invention also uses a bidirectional plate ring structure to drive a fixed angle connecting rod to complete the protruding and retracting reciprocating movement of the tunneling mechanism. In addition, the auxiliary oil cylinder can achieve the reciprocating horizontal movement of the tunneling mechanism through the reciprocating and intersecting between the telescopic end and the connecting rod structure, so as to achieve targeted pressure adjustment tunneling action for different soil layers. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0024] Figure 3 This is a side sectional view of the present invention;

[0025] Figure 4 This is a structural diagram of the top-feeding disk of the present invention;

[0026] Figure 5 This is a structural diagram of the top-feeding disk of the present invention;

[0027] Figure 6 This is a contact diagram illustrating the pushing state of the pushing disk of the present invention;

[0028] Figure 7 This is a schematic diagram of the installation of the main hydraulic cylinder of the present invention;

[0029] Figure 8 This is a structural diagram of the operating framework of the present invention.

[0030] In the diagram: 1. Working shaft frame; 2. Load-bearing steel base; 3. Main hydraulic cylinder; 4. Push plate; 5. Jacking plate; 6. Tunneling mechanism; 601. Separation plate; 602. Cylinder; 603. Telescopic wing plate; 7. Intermittent push rod; 8. Bottom frame; 9. Sliding rod; 10. Fixed support plate; 11. Sliding block; 12. Snap ring; 13. Push pipe ring; 14. Motor; 15. Auxiliary hydraulic cylinder; 16. Fixed angle connecting rod; 17. Pin plate; 18. Adjusting rod; 19. Rear pull plate; 20. Front push plate; 21. Rear pull ring; 22. Front push ring; 23. Push groove; 24. Snap groove. Detailed Implementation

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] Before describing the specific implementation methods, the application background of this invention is first supplemented. This invention is applied to pipeline laying in municipal pipeline network construction. The pipe jacking construction process utilizes excavated working shafts and receiving shafts, and completes the connection between the two by jacking and simultaneously laying pipelines using a main jacking cylinder. Specifically, to address the problem of inconsistent jacking axes caused by the rotation of the jacking head during bidirectional pipe jacking construction, the following technical solution is proposed:

[0034] Reference Figure 1 - Figure 8 As shown, the adaptive telescopic pipe jacking head structure applied in pipe jacking construction in this embodiment includes a pipe jacking head structure driven by a main hydraulic cylinder 3 and set in the working well frame 1. The pipe jacking head structure includes a synchronously translating jacking plate 5 and a push pipe ring 13. An axial rotation component is set inside the jacking plate 5, and the front end of the axial rotation component is connected to a tunneling mechanism 6 that fits to the front side of the jacking plate 5.

[0035] Reference Figure 3 and Figure 6 As shown, the axial rotation assembly includes a motor 14 and an auxiliary cylinder 15. The output end of the motor 14 is connected to the tunneling mechanism 6 through a linkage structure. The motor 14 and the auxiliary cylinder 15 together control the bidirectional pushing and retracting action of the tunneling mechanism 6 through the linkage structure.

[0036] For the rapid correction of axis deviation during the construction of the pipe jacking machine head, the following is added: the tunneling mechanism 6 includes a separation plate 601, a cylinder 602, and a telescopic wing plate 603 connected to the output end of the auxiliary cylinder 15. The telescopic wing plate 603 is set outside the separation plate 601 and moves independently in the radial direction. An attitude sensor is embedded in the center of the separation plate 601 to obtain the jacking angle deviation of the pipe jacking machine head during the pipe jacking construction process in real time and feed it back to the corresponding position of the telescopic wing plate 603 in real time. If the angular deviation occurs and the axis is jacked, the cylinder 602 at the current deviation position is immediately activated to retract and drive the telescopic wing plate 603 to retract. The cylinder 602 corresponding to the telescopic wing plate 603 at 180° relative to the telescopic wing plate 603 extends and drives the telescopic wing plate 603 to expand, thereby generating a corrective torque so that the pipe jacking machine head returns to the preset axis position.

[0037] The motion of the axial rotation component can be summarized as follows: the combination of axial rotation and axial horizontal displacement drives the front-end tunneling mechanism 6 to achieve bidirectional pushing and pulling action. In this process, when applied to the pipe jacking construction process of tunnel excavation, it can make targeted jacking action conversion according to the current terrain. Specifically, the motor 14 provides the tunneling power of the tunneling mechanism 6, while the auxiliary oil cylinder 15 realizes the reciprocating horizontal movement of the tunneling mechanism 6 through the reciprocating and intersecting between the telescopic end and the connecting rod structure, thereby achieving targeted tunneling action for different soil layers.

[0038] Reference Figure 2 and Figure 7 As shown, the main hydraulic cylinder 3 is a double hydraulic cylinder structure and is connected to intermittent push rods 7 respectively. The intermittent push rod 7 has a slot 24 and a push plate 4 is sleeved on the intermittent push rod 7. A retaining ring 12 is intermittently inserted into the slot 24 on the intermittent push rod 7 for intermittent push and retraction control of the push plate 4. The bottom frame 8 and the sliding rod 9 are provided with a load-bearing steel seat 2 near the outside of the main hydraulic cylinder 3 to form a drive backrest for the main hydraulic cylinder 3. The front end of the intermittent push rod 7 is a conical structure. The rear side of the push pipe ring 13 is provided with a push groove 23 that matches the conical structure. The application scenario of this invention is pipe jacking construction. The load-bearing steel seat 2 forms a backrest support, and the main hydraulic cylinder 3 completes the overall advancement or retraction of the jacking plate 5 and the push pipe ring 13, thereby achieving the purpose of continuous pipe jacking construction.

[0039] The retaining ring 12 is inserted into the pushing groove 23 through intermittent hoisting. Specifically, when the main hydraulic cylinder 3 drives the intermittent push rod 7 to extend, the intermittent push rod 7 passes through the pushing plate 4 and pushes the jacking plate 5 and the pushing pipe ring 13 to move into the soil as a whole. At this time, the retaining ring 12 is in the retaining groove 23 near the rear side of the pushing plate 4. After the jacking plate 5 and the pushing pipe ring 13 have moved inward by one unit distance of a single pipe section, the main hydraulic cylinder 3 drives the intermittent push rod 7 to retract. Simultaneously, the hoisting equipment drives the retaining ring 12 to disengage from the retaining groove 23 near the rear side of the pushing plate 4 and insert it into the retaining groove 23 that fits against the front side. Then, the main hydraulic cylinder 3 retracts, which drives the jacking plate 5, the pushing pipe ring 13, and the pushing plate 4 to retract. During this process, the pushing plate 4 always slides horizontally on the sliding rod 9, which can ensure that the pipe jacking operation is always carried out on the same axis.

[0040] Basic principle: This invention is an improvement on the structure of the pipe jacking head in a pipe jacking machine. It adopts a modular collaborative drive and intermittent step-by-step propulsion mechanism, with the main hydraulic cylinder 3 as the core power source, driving the synchronous translation of the jacking plate 5 and the pusher ring 13 to ensure axial stability. The auxiliary hydraulic cylinder 15 and the connecting rod structure control the axial rotation component to achieve bidirectional pushing and retracting. When adapting to pipe jacking construction in complex strata, the reciprocating translational tunneling action is used to improve pipe jacking efficiency. When applied to bidirectional pipe jacking construction, it can still ensure the consistency of the jacking axis.

[0041] Example 2

[0042] Reference Figure 1 - Figure 8 As shown, this embodiment achieves pressure regulation during pipe jacking construction through the addition of a connecting rod structure, specifically as follows:

[0043] Reference Figure 3 , Figure 4 and Figure 6 As shown, the linkage structure includes a fixed angle linkage 16 that is intersected and connected. The front end of the fixed angle linkage 16 is connected to a pin plate 17 that is connected to the separation plate 601. The output end of the auxiliary cylinder 15 is connected to an adjusting rod 18. The adjusting rod 18 is sleeved with a rear pull ring 21 and a front push ring 22 that are spaced apart. The adjusting rod 18 is respectively sleeved with a rear pull plate 19 and a front push plate 20 on the outside of the rear pull ring 21 and the front push ring 22. The outer periphery of the rear pull plate 19 and the front push plate 20 respectively contact the middle of the front and rear sections of the inner side of the fixed angle linkage 16.

[0044] For the fixed angle connecting rod 16, its operation process is as follows: Based on the extension and retraction control of the auxiliary oil cylinder 15, when the auxiliary oil cylinder 15 starts to extend, it drives the front push plate 20 to move forward through the front push ring 22. At this time, the front push plate 20 pushes the fixed angle connecting rod 16 forward, so that the tunneling mechanism 6 moves forward in a protruding manner. When the auxiliary oil cylinder 15 starts to retract, it drives the rear pull plate 19 to move backward through the rear pull ring 21. At this time, the rear pull plate 19 pushes the fixed angle connecting rod 16 backward, so that the tunneling mechanism 6 moves backward in a concave manner. The above two actions can be combined to form a two-way pushing and retracting action for different soil layers. Combined with the rotational drive of the motor 14 and the jacking drive of the main oil cylinder 3, the purpose of targeted pressure adjustment and jacking for different soil layers can be achieved.

[0045] Intermittent push rod 7 passes through push plate 4 and abuts against jacking plate 5. The bottom of working well frame 1 is provided with bottom frame 8, and sliding rod 9 is installed on bottom frame 8. Sliding block 11 connected to push plate 4 is slidably arranged on sliding rod 9. Referring to embodiment 1, sliding rod 9 provides horizontal sliding guide for sliding block 11, and sliding block 11 moves based on push plate 4. The horizontal sliding guide realizes precise guidance in a single pipe jacking process, and even in the reverse pipe jacking process, it can ensure coaxial implementation with the forward direction.

[0046] The implementation principle of this embodiment is as follows: the bidirectional plate ring structure drives the fixed angle connecting rod 16 to complete the protruding and retracting reciprocating movement of the tunneling mechanism 6. In addition, in embodiment one, the main oil cylinder 3 is used as the core power to drive the synchronous translation of the jacking plate 5 and the push pipe ring 13, ensuring the synchronous implementation of the axis stability. The auxiliary oil cylinder 15 realizes the reciprocating horizontal movement of the tunneling mechanism 6 through the reciprocating and intersecting between the telescopic end and the connecting rod structure, thereby achieving targeted tunneling actions for different soil layers.

[0047] Example 3

[0048] Reference Figure 1 - Figure 8 As shown, this embodiment, combining Embodiment 1 and Embodiment 2, constitutes a working method for an adaptive telescopic pipe jacking head structure applied in pipe jacking construction, including the following steps:

[0049] 1. During unidirectional pipe jacking, when the main hydraulic cylinder 3 drives the intermittent push rod 7 to extend, the intermittent push rod 7 passes through the push plate 4 and pushes the jacking plate 5 and the push pipe ring 13 to move into the soil as a whole. At this time, the retaining ring 12 is in the retaining groove 23 near the rear side of the push plate 4. After the jacking plate 5 and the push pipe ring 13 have moved inward by one unit distance of a single pipe section, the main hydraulic cylinder 3 drives the intermittent push rod 7 to retract. Simultaneously, the hoisting equipment drives the retaining ring 12 to disengage from the retaining groove 23 near the rear side of the push plate 4 and place it into the retaining groove 23 that fits the front side. Then, the main hydraulic cylinder 3 retracts, which in turn drives the jacking plate 5, the push pipe ring 13, and the push plate 4 to retract.

[0050] 2. In the unidirectional pipe jacking operation, the separation plate 601 is centrally equipped with an attitude sensor, which is used to obtain the jacking angle deviation of the pipe jacking machine head during the pipe jacking construction process in real time and feed it back to the corresponding position of the telescopic wing plate 603 in real time. If the angular deviation occurs and the axis is jacked, the cylinder 602 at the current deviation position is immediately activated to retract and drive the telescopic wing plate 603 to retract. At the same time, the cylinder 602 corresponding to the telescopic wing plate 603 at 180° relative to the telescopic wing plate 603 extends and drives the telescopic wing plate 603 to expand, thereby generating a corrective torque so that the pipe jacking machine head returns to the preset axis position.

[0051] 3. The pressure adjustment operation during unidirectional pipe jacking is based on the extension and retraction control of the auxiliary cylinder 15. When the auxiliary cylinder 15 starts to extend, it drives the front push plate 20 to move forward through the front push ring 22. At this time, the front push plate 20 pushes the fixed angle connecting rod 16 forward, causing the tunneling mechanism 6 to move forward in a protruding manner. When the auxiliary cylinder 15 starts to retract, it drives the rear pull plate 19 to move backward through the rear pull ring 21. At this time, the rear pull plate 19 pushes the fixed angle connecting rod 16 backward, causing the tunneling mechanism 6 to move backward in a recessed manner. The above two actions can be combined to form a bidirectional pushing and retracting action for different soil layers. Combined with the rotational drive of the motor 14 and the pipe jacking drive of the main cylinder 3, the purpose of targeted pressure adjustment and jacking for different soil layers can be achieved.

[0052] 4. Reversing the pipe jacking: The hoisting equipment reverses the load-bearing steel base 2, main hydraulic cylinder 3, and pipe jacking head structure by 180° to ensure they are all on the same horizontal axis for fixed installation. Then, repeat operations 1 / 2 and 3 above to complete the bidirectional pipe jacking operation.

[0053] In summary, this invention, combining embodiments one, two, and three, is an improvement to the head structure of a pipe jacking machine. It employs a modular collaborative drive and intermittent step-by-step propulsion mechanism, with the main hydraulic cylinder 3 as the core power source, driving the synchronous translation of the jacking disc 5 and the pusher ring 13 to ensure axial stability. The auxiliary hydraulic cylinder 15 and connecting rod structure control the axial rotation assembly to achieve bidirectional pushing and retracting. When adapting to pipe jacking construction in complex geological formations, the reciprocating translational tunneling action improves pipe jacking efficiency. Even when applied to bidirectional pipe jacking construction, it still ensures consistent jacking axis alignment.

[0054] Furthermore, the bidirectional plate ring structure drives the fixed angle connecting rod 16 to complete the protruding and recessed reciprocating movement of the tunneling mechanism 6. In addition, the auxiliary oil cylinder 15 can achieve the reciprocating horizontal movement of the tunneling mechanism 6 through the reciprocating and intersecting between the telescopic end and the connecting rod structure, so as to achieve targeted pressure adjustment tunneling action for different soil layers, and ultimately improve the construction efficiency of municipal pipeline network in the process of municipal construction.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A self-adaptive telescopic pipe jacking head structure applied to pipe jacking construction, comprising a pipe jacking head structure driven by a main oil cylinder (3) arranged in a working well frame (1), characterized in that, The pipe jacking head structure includes a synchronously translating jacking plate (5) and a pipe pushing ring (13). The jacking plate (5) is equipped with an axial rotation component, and the front end of the axial rotation component is connected to a tunneling mechanism (6) that fits against the front side of the jacking plate (5). The axial rotation assembly includes a motor (14) and an auxiliary cylinder (15). The output end of the motor (14) is connected to the tunneling mechanism (6) through a linkage structure. The motor (14) and the auxiliary cylinder (15) together control the bidirectional pushing and retracting action of the tunneling mechanism (6) through the linkage structure. The tunneling mechanism (6) includes a separation plate (601), a cylinder (602) and a telescopic wing plate (603) connected to the output end of the auxiliary cylinder (15). The telescopic wing plate (603) is located outside the separation plate (601) and moves independently in the radial direction. The linkage structure includes intersecting fixed angle linkages (16), the front end of the fixed angle linkages (16) is connected to a pin plate (17) connected to the separation plate (601), the output end of the auxiliary cylinder (15) is connected to an adjusting rod (18), and the adjusting rod (18) is sleeved with a spaced rear pull ring (21) and a front push ring (22). The adjusting rod (18) is fitted with a rear pull plate (19) and a front push plate (20) on the outside of the rear pull ring (21) and the front push ring (22), respectively, and the outer periphery of the rear pull plate (19) and the front push plate (20) respectively contact the middle of the front and rear sections of the inner side of the fixed angle connecting rod (16); The main oil cylinder (3) is a double oil cylinder structure and is connected to an intermittent push rod (7) respectively. The intermittent push rod (7) is provided with a slot (24) and a push plate (4) is provided on the intermittent push rod (7). The intermittent push rod (7) passes through the push plate (4) and abuts against the top plate (5). The working well frame (1) has a bottom frame (8) at its inner bottom, and a sliding rod (9) is installed on the bottom frame (8). A sliding block (11) connected to the push plate (4) is slidably arranged on the sliding rod (9). The front end of the sliding rod (9) is fixedly installed with a fixed support plate (10) for supporting the jacking machine head structure. The concave side of the fixed support plate (10) is in contact with the outer ring side of the jacking machine head structure. The slot (24) on the intermittent push rod (7) is intermittently suspended and inserted with a retaining ring (12) for intermittent pushing and retracting control of the push plate (4).

2. The self-adapting telescopic pipe jacking head structure applied to pipe jacking construction according to claim 1, characterized in that, The bottom frame (8) and sliding rod (9) are provided with a load-bearing steel seat (2) on the outer side near the main oil cylinder (3), forming a drive backrest for the main oil cylinder (3).

3. The adaptive telescopic pipe jacking head structure applied in pipe jacking construction according to claim 1, characterized in that, The front end of the intermittent push rod (7) is a conical structure, and the rear side of the push tube ring (13) is provided with a push groove (23) that matches the conical structure.

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