Split type pipe jacking machine

Abstract

The utility model provides a split type pipe jacking machine which comprises a split type pipe jacking machine body composed of a plurality of shield bodies, and each shield body is formed by combining an upper shield body and a lower shield body which are oppositely arranged up and down. The split type pipe jacking machine is split into a plurality of units, hoisting work of the split type pipe jacking machine can be conveniently completed in a narrow space, meanwhile, through a pushing installation mode, installation and jacking construction can be combined, and therefore the construction period is effectively shortened, and the construction efficiency is improved. In addition, according to the method, the situation that in a traditional method, constructors conduct tunnel portal breaking construction operation in a crack between the tunnel portal and a pipe jacking machine is avoided, safety is effectively improved, after tunnel portal breaking is completed, the first shield body is jacked into the tunnel portal, beneficial support is formed, the collapse condition of the tunnel portal can be avoided, and in addition, the construction efficiency is improved. Due to the structure of the split type pipe jacking machine, the size of each part is smaller, the pipe jacking machine can be conveniently hoisted in a narrow receiving well, and the hoisting posture can be conveniently adjusted.

Description

Technical Field

[0001] The utility model relates to the field of rectangular pipe jacking construction, in particular to a split type pipe jacking machine. Background Art

[0002] Pipe jacking construction is a technology that uses the jacking force generated by jacking equipment in the working well to overcome the friction between the pipe and the surrounding soil, push the pipe into the soil according to the designed slope, and remove the earth. After each pipe section is pushed in, the next pipe section will continue to be pushed in until the entire tunnel is through, and then the pipe jacking machine will be hoisted out of the receiving well foundation pit. In order to ensure smooth construction, the pipe jacking machine needs to be assembled and debugged in the working well, and then the jacking construction will begin, while ensuring that the soil can be discharged in time during the tunnel excavation process. After the pipe jacking machine arrives at the receiving well, it will be completely received and hoisted out to prevent the mud around the jacking pipe from leaking and causing the tunnel to collapse.

[0003] However, the traditional pipe jacking machine hoisting construction has some shortcomings. First, the traditional method requires the pipe jacking machine to be assembled in the working shaft before the initial construction can be carried out, which not only prolongs the construction period, but also increases the demand for working shaft space. Secondly, when workers are performing tunnel door breaking operations in front of the pipe jacking machine, if the tunnel door collapses, there is almost no room for escape because the workers are between the tunnel door and the pipe jacking machine, which poses a safety hazard. Finally, when faced with the construction conditions of a narrow receiving shaft, the traditional method can only adopt shell abandonment construction, that is, leaving the outer shell of the pipe jacking machine in the tunnel, which not only causes a great waste of resources, but also increases construction costs. Therefore, a pipe jacking machine construction method in a narrow space is proposed to solve the above problems. Utility Model Content

[0004] The main purpose of the utility model is to provide a split pipe jacking machine to solve the problems of long construction period of existing pipe jacking machines, large space requirement in the working well, high safety risk for workers during tunnel breaking operations, high construction cost in narrow receiving well conditions, and serious waste of resources.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a split-type pipe jacking machine, including a split-type pipe jacking machine composed of a plurality of shields, each of which is composed of an upper shield and a lower shield arranged opposite to each other;

[0006] The edges of the lower shield body and the upper shield body are provided with docking plates extending inwards. Except for the first shield body, the front end docking plates of the remaining shield bodies are provided with multiple quick docking mechanisms. Except for the rearmost shield body, the rear end docking plates of the remaining shield bodies are provided with docking holes corresponding to the quick docking mechanisms for connecting the shield bodies.

[0007] The butt joint plates where the upper shield body and the lower shield body are connected are also respectively provided with quick butt joint mechanisms and butt joint holes for connecting the upper shield body and the lower shield body.

[0008] In a preferred embodiment, the quick docking mechanism includes a positioning outer sleeve disposed outside the docking plate. Above the positioning outer sleeve, there are a plurality of extending moving grooves communicating with its interior. A top-pushing and expanding mechanism that can extend from the extending moving grooves is movably disposed inside. A displacement spring is provided between the top of the top-pushing and expanding mechanism and the inner top wall of the positioning outer sleeve. A top-pushing mechanism for controlling the retraction, expansion, and displacement of the top-pushing and expanding mechanism is also provided in the positioning outer sleeve.

[0009] In a preferred embodiment, the top-pushing and expanding mechanism includes a housing movably disposed in the positioning outer sleeve. The bottom end of the housing is open, and its side is provided with a plurality of telescopic openings corresponding to the extending moving grooves. A locking block is telescopically disposed in the telescopic openings. The front end of the locking block can pass through the extending moving groove, and the end is provided with a wedge-shaped block with a downward slope. The length of the wedge-shaped block is greater than that of the locking block, and a return spring is provided between it and the inner wall surface of the housing.

[0010] When the locking block is in the telescopic state, its front end is flush with the outer wall surface of the positioning outer sleeve. The length of the extending moving groove is greater than that of the locking block, enabling the overall displacement of the top-pushing and expanding mechanism.

[0011] In a preferred embodiment, the elastic coefficient of the return spring is smaller than that of the displacement spring.

[0012] In a preferred embodiment, a sliding block is further provided at the top of the wedge-shaped block, and a sliding groove matching the sliding block is provided on the inner top wall of the housing.

[0013] In a preferred embodiment, the top-pushing mechanism includes an internally threaded sleeve rotatably penetrating through the bottom end of the positioning outer sleeve. A telescopic screw is threadedly connected inside the internally threaded sleeve. The top end of the telescopic screw passes through the internally threaded sleeve, and several limiting sliding rods are provided outside. Limiting sliding grooves matching the limiting sliding rods are provided on the inner wall surface of the positioning outer sleeve. A conical top-pushing portion matching the wedge-shaped block is further provided at the top end of the limiting sliding rod. A driving device for controlling the rotation of the internally threaded sleeve is also provided at the bottom end of the positioning outer sleeve.

[0014] In a preferred embodiment, a plurality of receiving grooves are provided on both sides of the lower shield and the upper shield, and lifting lugs rotatably connected by a rotating shaft are provided in the receiving grooves.

[0015] The utility model provides a split pipe jacking machine. By splitting the split pipe jacking machine into multiple units, it is convenient to complete its hoisting work in a narrow space. At the same time, through the form of jacking installation, the installation and pipe jacking construction can be combined, thus effectively shortening the construction period. In addition, this method also avoids the construction operation of breaking the portal in the gap between the portal and the pipe jacking machine by construction workers in the traditional method, effectively improving the safety. After the portal is broken, by jacking the first shield into the portal, a favorable support is formed, which can avoid the situation of its collapse. In addition, the structure of the split pipe jacking machine makes each part smaller in size, which is also convenient to lift it out in a narrow receiving well and adjust the hoisting attitude, thus saving the construction period, avoiding leaving the outer shell of the pipe jacking machine in the tunnel, causing greater waste of resources and increasing the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further illustrates the present utility model in conjunction with the drawings and embodiments:

[0017] Figure 1 is the overall structure diagram of the split pipe jacking machine of the present utility model;

[0018] Figure 2 is the schematic assembly process diagram of the split pipe jacking machine of the present utility model in the launching shaft;

[0019] Figure 3 is the structural schematic diagram of the split pipe jacking machine of the present utility model entering the receiving well;

[0020] Figure 4 is the connection structure diagram of the upper shield and the lower shield of the present utility model;

[0021] Figure 5 is the present utility model Figure 4 structural diagram from another perspective;

[0022] Figure 6 is the exploded structure diagram of the upper shield and the lower shield of the present utility model;

[0023] Figure 7 is the semi-sectional schematic diagram of the exploded structure of the upper shield and the lower shield of the present utility model;

[0024] Figure 8 is the semi-sectional structure diagram of the quick docking mechanism of the present utility model;

[0025] Figure 9 is the present utility model Figure 8 exploded structure diagram;

[0026] Figure 10 is the semi-sectional structure diagram of the jacking deployment mechanism of the present utility model;

[0027] Figure 11It is a schematic diagram of the deployment process of the pushing and deploying mechanism of the present utility model;

[0028] Figure 12 It is a structural diagram of the turning-over mechanism of the present utility model;

[0029] Figure 13 It is an exploded structural diagram of the turning-over mechanism of the present utility model;

[0030] Figure 14 It is a semi-sectional schematic diagram of the connection structure between the transverse movement mechanism and the quick docking mechanism of the present utility model;

[0031] Figure 15 It is the present utility model Figure 13 Structural diagram from another perspective;

[0032] Figure 16 It is a structural diagram of the connection between the lower shield body and the turning-over mechanism of the present utility model;

[0033] Figure 17 It is a structural diagram of the connection between the upper shield body and the turning-over mechanism of the present utility model;

[0034] Figure 18 It is a schematic diagram of the turning-over process of the present utility model;

[0035] In the figure: shield body 1; upper shield body 10; lower shield body 11; docking plate 12; docking hole 13; quick docking mechanism 14; positioning outer sleeve 140; extending moving groove 141; pushing and deploying mechanism 142; housing 1420; telescopic opening 1421; locking block 1422; return spring 1423; wedge block 1424; sliding groove 1425; sliding block 1426; displacement spring 143; pushing mechanism 144; internal thread sleeve 1440; telescopic screw 1441; limit sliding rod 1442; conical pushing part 1443; driving device 1444; turning-over mechanism 2; chassis 21; support sliding rod 22; moving and turning component 23; sliding sleeve 230; connecting plate 231; L-shaped turning platform 232; transverse movement plate 235; transverse movement groove 2350; connecting rod 2351; transverse movement telescopic cylinder 2352; pushing plate 2353; support block 236; driven gear 237; traction hook 238; winch 24; reset rotation mechanism 25; concave base 250; moving sliding rod 251; reset driving device 252; transmission gear 253; moving telescopic cylinder 254. Detailed implementation manners

[0036] Embodiment 1

[0037] As Figures 1 - 3 shown, a construction method of a pipe jacking machine in a narrow space includes a split-type pipe jacking machine composed of multiple shield bodies 1, and each shield body 1 is composed of an upper shield body 10 and a lower shield body 11 which are arranged opposite to each other up and down. In this embodiment, there are three shield bodies 1 in total, and the method includes:

[0038] S1. Install the cutter head and motor of the pipe jacking machine on the upper shield 10 and lower shield 11 of the first shield 1 inside the factory.

[0039] S2. Install the jacking cylinders in the launching shaft and carry out the construction of breaking through the portal.

[0040] S3. Hoist the lower shield 11 and upper shield 10 of the first shield 1 to in front of the portal in sequence and assemble the two.

[0041] S4. Push out the jacking cylinders, jack the first shield 1 into the portal, then install the lower shield 11 of the second shield 1 behind it, then install the earth discharging screw conveyor corresponding to the tail of the cutter head on it, the rear of the earth discharging screw conveyor is fixed on the upper shield 10 of the first shield 1 by a suspension rod, there is a suspension part for fixing the suspension rod preset on the upper shield 10 of the first shield 1, and then install the corresponding upper shield 10 on the lower shield 11 of the second shield 1.

[0042] S5. Push out the jacking cylinders and make the cutter head start to rotate, deposit the cut soil into the gap between the cutter head and the screw conveyor, make the second shield 1 enter the portal, and then install the shields 1 behind it in the order from bottom to top.

[0043] S6. Repeat step S5 until all the shields 1 are installed. Use the earth discharging trolley to carry out earth discharging, and then the conventional pipe jacking construction can start.

[0044] S7. When the pipe jacking construction is completed, jack the first shield 1 of the split pipe jacking machine out of the portal of the receiving shaft, fill the gap between the portal and the first shield 1, remove the cutter head and motor on the first shield 1, the cutter head can be directly hoisted out of the receiving shaft, the motor is transported out from the launching shaft behind the tunnel, remove the connection between the first shield 1 and the rear shield 1, and the connection between the upper shield 10 and the lower shield 11, and then hoist the upper shield 10, the earth discharging screw conveyor and the lower shield 11 out of the receiving shaft in sequence.

[0045] S8. Continue to push, jack the second shield 1 out of the portal, fill the gap between the portal and the second shield 1, then remove its connection with the rear shield 1, and the connection between the upper shield 10 and the lower shield 11, and then hoist the upper shield 10 and the lower shield 11 out of the receiving shaft in sequence.

[0046] S9. Repeat step S8 until all the shields 1 are removed and hoisted out.

[0047] In a preferred embodiment, a plurality of receiving grooves 15 are provided on both sides of the lower shield 11 and the upper shield 10. In this embodiment, two receiving grooves 15 are provided on one side. A lifting lug 16 rotatably connected by a rotating shaft is provided in the receiving groove 15. The lifting effect can be achieved through the lifting lug 16. At the same time, when not in use, the lifting lug 16 can be stored in the receiving groove 15 to avoid affecting the pipe jacking process.

[0048] With such a design, the split pipe jacking machine can be disassembled into multiple units, which is convenient for hoisting work in a narrow space. At the same time, through the form of jacking installation, the installation and jacking construction can be combined, thereby effectively shortening the construction period. In addition, this method also avoids the construction personnel breaking the portal in the gap between the portal and the pipe jacking machine in the traditional method, effectively improving the safety. After the portal is broken, by jacking the first shield 1 into the portal, a favorable support is formed, which can avoid the situation of collapse. In addition, the structure of the split pipe jacking machine makes each part smaller in size, which is also convenient for hoisting it in a narrow receiving well and adjusting the hoisting posture, thus saving the construction period, avoiding leaving the shell of the pipe jacking machine in the tunnel, causing a large waste of resources and increasing the construction cost.

[0049] Embodiment 2

[0050] Combined with Embodiment 1 for further illustration, as Figures 4 - 11 shown in the structure, in order to meet the smoothness of the assembly and disassembly of the split pipe jacking machine in Embodiment 1, shorten the assembly and disassembly time, improve construction safety, and achieve the rapid docking and disassembly between the upper shield 10, the lower shield 11 and the shield 1, docking plates 12 extending inward are provided at the edges of the lower shield 11 and the upper shield 10. The cross-sections of the lower shield 11 and the upper shield 10 are both U-shaped. When they are docked with each other, a rectangular body is formed. The docking plate 12 can effectively increase the contact area between the lower shield 11 and the upper shield 10, and the shield 1.

[0051] Except for the first shield 1, a plurality of quick docking mechanisms 14 are provided on the front docking plates 12 of the remaining shields 1. The quick docking mechanisms 14 are distributed in a ring shape. Except for the last shield 1, docking holes 13 corresponding to the quick docking mechanisms 14 on the front docking plates 12 are provided on the rear docking plates 12 of the remaining shields 1 for connecting between the shields 1.

[0052] Quick docking mechanisms 14 and docking holes 13 are also respectively provided on the docking plates 12 where the upper shield 10 and the lower shield 11 are docked, specifically located on the two opposite end faces of the upper shield 10 and the lower shield 11, for connecting between the upper shield 10 and the lower shield 11.

[0053] Furthermore, the quick docking mechanism 14 includes a positioning outer sleeve 140 fixedly arranged on the outer side of the docking plate 12. The diameter of the docking hole 13 is slightly larger than the outer diameter of the positioning outer sleeve 140. Thus, during docking, the positioning outer sleeve 140 can pass through the docking hole 13 to complete docking and positioning.

[0054] Above the positioning outer sleeve 140, there are multiple extending and moving grooves 141 connected to its interior. In this embodiment, the number of the extending and moving grooves 141 is four, and they are equidistantly distributed on the positioning outer sleeve 140. An ejecting and expanding mechanism 142 that can extend from the extending and moving grooves 141 is movably arranged inside the positioning outer sleeve 140. A displacement spring 143 is arranged between the top of the ejecting and expanding mechanism 142 and the inner top wall of the positioning outer sleeve 140. A pushing mechanism 144 for controlling the expansion, contraction, and displacement of the ejecting and expanding mechanism 142 is also arranged in the positioning outer sleeve 140.

[0055] It should be noted that when the positioning outer sleeve 140 passes through the docking hole 13, the ejecting and expanding mechanism 142 needs to complete passing through the docking hole 13.

[0056] With such a design, after the positioning outer sleeve 140 passes through the docking hole 13, the pushing mechanism 144 can be used to expand the ejecting and expanding mechanism 142, thereby expanding the diameter of the positioning outer sleeve 140 by its expansion. The expanded diameter is larger than the diameter of the docking hole 13, thus achieving a locking effect. At the same time, the pushing mechanism 144 is used to push the ejecting and expanding mechanism 142 to compress the displacement spring 143, realizing the displacement of the ejecting and expanding mechanism 142 in the direction of the docking hole 13, so that the expanding structure of the ejecting and expanding mechanism 142 abuts against the penetrated docking plate 12, making the locking tighter and avoiding the displacement between the shields due to the existence of play.

[0057] Furthermore, the ejecting and expanding mechanism 142 specifically includes a housing 1420 movably arranged in the positioning outer sleeve 140. The bottom end of the housing 1420 is open, and multiple telescopic openings 1421 corresponding to the extending and moving grooves 141 are arranged on its side surface. Locking blocks 1422 that can be telescopically arranged are arranged in the telescopic openings 1421. The front end of the locking block 1422 can pass through the extending and moving grooves 141, and a wedge-shaped block 1424 with a downward-facing slope is arranged at the end. The length of the wedge-shaped block 1424 is greater than that of the locking block 1422, and a return spring 1423 is arranged between it and the inner wall surface of the housing 1420. The number of the return springs 1423 is two, which are respectively located on the upper and lower sides of the locking block 1422.

[0058] With such a design, by inserting a cone between the four wedge-shaped blocks 1424, it can be made to extend outwards, thereby achieving the effect of expanding the diameter of the positioning outer sleeve 140 by using the locking blocks 1422. At the same time, when the cone leaves between the four wedge-shaped blocks 1424, the wedge-shaped blocks 1424 will retract under the action of the return spring 1423, thus achieving the effect of unlocking.

[0059] It should be noted that the elastic coefficient of the return spring 1423 is smaller than that of the displacement spring 143, so that the return spring 1423 is softer than the displacement spring 143. When subjected to the same pressure, the return spring 1423 will be compressed first, and then the protrusion of the wedge block 1424 will be earlier than the displacement of the whole pushing and unfolding mechanism 142, avoiding the situation of being unable to lock due to the displacement first.

[0060] A sliding block 1426 is integrally formed on the top of the wedge block 1424, and a sliding groove 1425 matching the sliding block 1426 is arranged on the inner top wall of the housing 1420. By the sliding of the sliding block 1426 in the sliding groove 1425, the expansion and contraction of the locking block 1422 is made more stable.

[0061] When the locking block 1422 is in the expansion and contraction state, its front end is flush with the outer wall surface of the positioning outer sleeve 140. The length of the protruding moving groove 141 is greater than that of the locking block 1422, which can displace the whole pushing and unfolding mechanism 142. At the same time, through the expansion and contraction of the locking block 1422 in the protruding moving groove 141, the up and down displacement of the pushing and unfolding mechanism 142 can be limited.

[0062] Furthermore, the pushing mechanism 144 includes an internally threaded sleeve 1440 rotatably penetrating through the bottom end of the positioning outer sleeve 140. A bearing for installing the internally threaded sleeve 1440 is arranged at the bottom end of the positioning outer sleeve 140. The top end of the internally threaded sleeve 1440 is located in the positioning outer sleeve 140 and is open. An expansion and contraction screw rod 1441 is threadedly connected inside the internally threaded sleeve 1440. The top end of the expansion and contraction screw rod 1441 passes through the internally threaded sleeve 1440, and a plurality of limiting slide rods 1442 are arranged outside. In this embodiment, the number of the limiting slide rods 1442 is two. Limiting slide grooves 1445 matching the limiting slide rods 1442 are arranged on the inner wall surface of the positioning outer sleeve 140. By the sliding connection of the limiting slide rods 1442 and the limiting slide grooves 1445, the situation that the expansion and contraction screw rod 1441 rotates with the internally threaded sleeve 1440 can be restricted. Thus, when the internally threaded sleeve 1440 rotates, the expansion and contraction screw rod 1441 moves linearly under the restriction of the limiting slide rods 1442 and the limiting slide grooves 1445. A conical pushing part 1443 matching the wedge block 1424 is fixedly arranged at the top end of the limiting slide rod 1442. Thus, the expansion and contraction of the locking block 1422 and the displacement of the whole pushing and unfolding mechanism 142 are realized by the lifting of the conical pushing part 1443. A driving device 1444 for controlling the rotation of the internally threaded sleeve 1440 is also arranged at the bottom end of the positioning outer sleeve 140. In this embodiment, the driving device 1444 can be a driving motor with a power supply, and the output shaft of the driving motor is in transmission connection with the internally threaded sleeve 1440. It should be noted that its size is smaller than the diameter of the positioning outer sleeve 140.

[0063] Embodiment 3

[0064] Further described in combination with Embodiments 1 and 2, as Figures 12 - 18 shown in the structure, since a support beam for enhancing the structural stability is provided at the top of the receiving well, when lifting the upper shield 10 and the lower shield 11, it is necessary to adjust their postures and adjust the horizontal posture to the vertical posture in order to bypass the support beam and lift them from the receiving well. However, it is difficult to adjust the posture in the air with a lifting tool, and it is easy to bump. At the same time, multiple cranes need to cooperate and the lifting point positions need to be adjusted multiple times, which is time-consuming and laborious. The structure of the receiving well and the support beam is as Figure 3 shown. Therefore, in this embodiment, a turning mechanism 2 for turning the upper shield 10 and the lower shield 11 is further provided in the receiving well. The turning mechanism 2 includes a chassis 21, and two support sliding rods 22 are symmetrically arranged on the chassis 21. A moving and turning assembly 23 is slidably arranged on the two support sliding rods 22.

[0065] With such a design, the turning of the upper shield 10 and the lower shield 11 can be realized by the sliding and turning of the moving and turning assembly 23 on the two support sliding rods 22, and only a single crane is needed to achieve the turning purpose.

[0066] Furthermore, the moving and turning assembly 23 includes two sliding sleeves 230 respectively sleeved on the two support sliding rods 22 in a sliding manner. A plurality of connecting plates 231 are arranged between the two sliding sleeves 230. An L-shaped turning platform 232 is hinged above the middle parts of the two sliding sleeves 230, and the hinge point is located at the corner of the L-shaped turning platform 232. Support blocks 236 are arranged at the tops of the front and rear ends of the sliding sleeves 230. The length of the support sliding rods 22 should meet the requirements of the two states of the L-shaped turning platform 232, and the support blocks 236 arranged at both ends thereof are respectively used to support the two states of the L-shaped turning platform 232.

[0067] With such a design, while the moving and turning assembly 23 slides on the two support sliding rods 22, the L-shaped turning platform 232 thereon can be turned.

[0068] Furthermore, a docking hole 13 adapted to the quick docking mechanism 14 at the bottom of the upper shield 10 is arranged at one end of the horizontal plate of the L-shaped turning platform 232 near the corner, and a quick docking mechanism 14 adapted to the docking hole 13 on the side of the lower shield 11 is arranged on the side through a transverse movement mechanism, so that the upper shield 10 and the lower shield 11 can be respectively matched and fixed to the two.

[0069] Among them, the transverse movement mechanism includes a transverse movement plate 235 movably arranged on the side of the horizontal plate of the L-shaped turnover table 232. A transverse movement groove 2350 is arranged on the horizontal plate of the L-shaped turnover table 232. A connecting rod 2351 penetrating through the transverse movement groove 2350 is arranged at the bottom of the transverse movement plate 235. A top push plate 2353 is connected to the bottom end of the connecting rod 2351. The cross sections of the transverse movement plate 235, the connecting rod 2351 and the top push plate 2353 are in an I shape. A transverse movement telescopic cylinder 2352 is fixedly arranged at the bottom of the horizontal plate of the L-shaped turnover table 232. The telescopic end of the transverse movement telescopic cylinder 2352 is connected to the top push plate 2353.

[0070] With such a design, the transverse movement of the transverse movement plate 235 and the quick docking mechanism 14 thereon can be realized through the transverse movement telescopic cylinder 2352, so that it can be inserted into the docking hole 13 of the lower shield body 11 to realize the locking of the lower shield body 11.

[0071] In a preferred solution, the turnover mechanism 2 further includes a winch 24 arranged at the end of the chassis 21. A towing hook 238 is arranged on the connecting plate 231 of the mobile turnover assembly 23 close to the winch 24. The rope on the winch 24 is connected to the towing hook 238. By winding the winch 24, the mobile turnover assembly 23 can be pulled back to the initial position to facilitate the turnover of the next shield body. It should be noted that when the mobile turnover assembly 23 can perform the turnover work, the rope of the winch 24 can be disengaged from the towing hook 238 or enter a powerless free state to avoid affecting the normal work of the mobile turnover assembly 23.

[0072] In a preferred solution, a reset rotation mechanism 25 is further arranged on the side of the chassis 21. The reset rotation mechanism 25 includes a concave base 250 arranged on the side of the chassis 21. Two moving slide bars 251 are symmetrically arranged in the concave base 250. A reset driving device 252 is slidably installed on the two moving slide bars 251. The reset driving device 252 is composed of a driving motor and a speed reducer transmission combination. Its base is slidably sleeved on the two moving slide bars 251. A moving telescopic cylinder 254 in the same direction as the moving slide bar 251 is arranged on the side of the concave base 250. The telescopic end of the moving telescopic cylinder 254 passes through the side wall of the concave base 250 and is connected to the reset driving device 252. Thus, by the telescopic movement of the moving telescopic cylinder 254, the reset driving device 252 can be pushed. A transmission gear 253 is arranged at the output end of the reset driving device 252. A driven gear 237 matching the transmission gear 253 is arranged at the end of the hinge shaft where the L-shaped turnover table 232 is hinged to the sliding sleeve 230. The transmission gear 253 can be meshed with the driven gear 237 in the initial state of the mobile turnover assembly 23.

[0073] With such a design, after the hoist 24 pulls the mobile turning assembly 23 back to the initial position, the driving gear 253 can be engaged with the driven gear 237 by the push of the mobile telescopic cylinder 254, so that the L-shaped turning platform 232 can be rotated to the initial state through the output of the reset driving device 252. At the same time, after completion, the driving gear 253 can be separated from the driven gear 237 by the pull of the mobile telescopic cylinder 254.

[0074] The chassis 21 includes two symmetrically arranged bottom plates 210. A plurality of connecting plates 211 are arranged between the two bottom plates 210. Baffles 212 extending upward are arranged at both ends of the bottom plates 210 for installing and supporting the sliding rods 22.

[0075] It is required that both the mobile telescopic cylinder 254 and the transverse telescopic cylinder 2352 can adopt hydraulic telescopic cylinders or electric telescopic cylinders. In addition, the overall structure of the turning mechanism 2 can adopt a bolt-fixed combined structure, which is convenient for hoisting and lifting off.

[0076] In the preferred solution, the turning method of the turning mechanism 2 includes:

[0077] S1. Hoist the removed upper shield 10 or lower shield 11 above the turning mechanism 2, then place one end of it on the L-shaped turning platform 232, release the lifting rope at this end, and keep the other end suspended and in the hoisting state;

[0078] S2. Connect the upper shield 10 or lower shield 11 to the L-shaped turning platform 232. When the turning object is the upper shield 10, the quick docking mechanism 14 at the end where it is placed on the L-shaped turning platform 232 is inserted into the docking hole 13 on the L-shaped turning platform 232, and the connection between the two is completed by using the quick docking mechanism 14; when the turning object is the lower shield 11, the quick docking mechanism 14 on it is pushed by the transverse movement mechanism to be inserted into the docking hole 13 on the side of the lower shield 11, and the connection between the two is completed by using the quick docking mechanism 14;

[0079] S3. Lift the suspended lifting rope of the upper shield 10 or lower shield 11, and complete the turning of the upper shield 10 or lower shield 11 to make it in a vertical state by using the rotation of the L-shaped turning platform 232 and the sliding of the sliding sleeve 230 on the support sliding rod 22;

[0080] S4. Reverse the implementation of step S2, release the fixation between the upper shield 10 or lower shield 11 and the L-shaped turning platform 232, and hoist the upper shield 10 or lower shield 11 out of the receiving well;

[0081] S5. After the upper shield 10 or lower shield 11 is separated from the L-shaped turning platform 232, start the hoist 24 to pull the L-shaped turning platform 232 back to the initial position, and then rotate the L-shaped turning platform 232 to the initial state through the reset rotation mechanism 25;

[0082] S6. Repeat steps S1 - S5 until all the upper shield bodies 10 or lower shield bodies 11 are hoisted out of the receiving well.

[0083] The above embodiments are only the preferred technical solutions of the present utility model and should not be regarded as limitations on the present utility model. The protection scope of the present utility model shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present utility model.

Claims

1. A split pipe jacking machine, comprising a split pipe jacking machine composed of a plurality of shields (1), characterized in that: Each shield body (1) is composed of an upper shield body (10) and a lower shield body (11) which are arranged opposite to each other up and down; Docking plates (12) extending inwards are provided at the edges of the lower shield body (11) and the upper shield body (10). Except for the first shield body (1), a plurality of quick docking mechanisms (14) are provided on the front docking plates (12) of the remaining shield bodies (1). Except for the last shield body (1), docking holes (13) corresponding to the quick docking mechanisms (14) are provided on the rear docking plates (12) of the remaining shield bodies (1) for connecting the shield bodies (1); Quick docking mechanisms (14) and docking holes (13) are also respectively provided on the docking plates (12) where the upper shield body (10) and the lower shield body (11) are docked for connecting the upper shield body (10) and the lower shield body (11).

2. The split pipe jacking machine according to claim 1, characterized in that: The quick docking mechanism (14) includes a positioning outer sleeve (140) provided on the outer side of the docking plate (12). A plurality of extending moving grooves (141) communicating with its interior are provided above the positioning outer sleeve (140). A top-pushing and unfolding mechanism (142) that can extend from the extending moving grooves (141) is movably arranged inside. A displacement spring (143) is provided between the top of the top-pushing and unfolding mechanism (142) and the inner top wall of the positioning outer sleeve (140). A top-pushing mechanism (144) for controlling the retraction, unfolding and displacement of the top-pushing and unfolding mechanism (142) is also provided in the positioning outer sleeve (140).

3. The split pipe jacking machine according to claim 2, characterized in that: The top-pushing and unfolding mechanism (142) includes a housing (1420) movably arranged in the positioning outer sleeve (140). The bottom end of the housing (1420) is open, and a plurality of telescopic openings (1421) corresponding to the extending moving grooves (141) are provided on its side. A locking block (1422) that can be telescopic is arranged in the telescopic openings (1421). The front end of the locking block (1422) can pass through the extending moving grooves (141), and a wedge-shaped block (1424) with a downward slope is arranged at the end. The length of the wedge-shaped block (1424) is greater than that of the locking block (1422), and a return spring (1423) is provided between it and the inner wall surface of the housing (1420); When the locking block (1422) is in the telescopic state, its front end is flush with the outer wall surface of the positioning outer sleeve (140), and the length of the extending moving groove (141) is greater than that of the locking block (1422), enabling the overall displacement of the top-pushing and unfolding mechanism (142).

4. The split pipe jacking machine according to claim 3, characterized in that: The elastic coefficient of the return spring (1423) is smaller than that of the displacement spring (143).

5. The split pipe jacking machine according to claim 4, characterized in that: A sliding block (1426) is also provided on the top of the wedge-shaped block (1424), and a sliding groove (1425) matching the sliding block (1426) is provided on the inner top wall of the housing (1420).

6. The split pipe jacking machine according to claim 5, wherein: The jacking mechanism (144) includes an internally threaded sleeve (1440) rotatably penetrating through the bottom end of the positioning outer sleeve (140). A telescopic screw rod (1441) is threadedly connected inside the internally threaded sleeve (1440). The top end of the telescopic screw rod (1441) passes out of the internally threaded sleeve (1440), and a number of limiting sliding rods (1442) are arranged on the outside. A limiting sliding groove (1445) matching the limiting sliding rods (1442) is arranged on the inner wall surface of the positioning outer sleeve (140). A conical jacking portion (1443) matching the wedge-shaped block (1424) is further arranged at the top end of the limiting sliding rod (1442). A driving device (1444) for controlling the rotation of the internally threaded sleeve (1440) is further arranged at the bottom end of the positioning outer sleeve (140).

7. The split pipe jacking machine according to any one of claims 1 to 6, characterized in that: A number of receiving grooves (15) are arranged on both sides of the lower shield body (11) and the upper shield body (10). Lifting lugs (16) rotatably connected by a rotating shaft are arranged in the receiving grooves (15).

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