Pipe jacking machine and construction technology thereof

Abstract

The invention relates to a pipe jacking machine and a construction technology thereof, and belongs to the technical field of non-excavation pipe jacking construction.The pipe jacking machine comprises a machine head and a center cutter rotationally connected to the center of one end of the machine head, and the machine head is provided with a rotating piece for driving the center cutter to rotate; the end, close to the center cutter, of the machine head is rotationally connected with a plurality of auxiliary cutters evenly distributed in the circumferential direction of the machine head, the ends, close to the machine head, of the auxiliary cutters are fixedly connected with driving shafts, the driving shafts are inserted into the machine head, and a driving assembly for driving the driving shafts to rotate is arranged in the machine head. The method has the effect of reducing the adverse effect on the working efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of trenchless pipe jacking construction, and in particular to a pipe jacking machine and a construction process thereof. Background Art

[0002] The pipe jacking machine is mainly composed of a rotary excavation system (i.e., the machine head) and a main jack hydraulic propulsion system, wherein the main jack hydraulic propulsion system includes a frame and a plurality of hydraulic cylinders installed on the frame and evenly distributed along the circumference of the frame, and the telescopic rods of the hydraulic cylinders face the machine head and abut against the side wall of the machine head. When in use, the hydraulic cylinder pushes the machine head to move.

[0003] A Chinese patent with publication number CN110284898B discloses a pipe jacking machine, which includes a soil bin shell, a cutter disc, a central crushing wheel, at least two active crushing wheels and a driving member. At least two forced material guiding members are arranged in the soil bin shell, and a forced crushing channel is formed between the at least two forced material guiding members. The cutter disc includes a cutter disc frame and a central cutter. The cutter disc frame is installed on the soil bin shell, and a crushing inlet is opened on the cutter disc frame. The crushing inlet is used to guide non-rock soil into the soil bin shell. The central cutter is installed on the cutter disc frame, and the central crushing wheel and at least two active crushing wheels are all installed in the soil bin shell. The central crushing wheel is located in the forced crushing channel and is fixed to the central cutter. The pipe jacking machine can perform excavation construction on at least two types of soil.

[0004] When using the pipe jacking machine in the related technology to pulverize soil structures such as gravel or miscellaneous fill with a content of ≤20%, the center cutter rotates and crushes at the center of the cutter holder, which may make it difficult to quickly crush the soil at the edge of the cutter holder, thereby adversely affecting work efficiency. Summary of the invention

[0005] In order to reduce the adverse effects on work efficiency, the present application provides a pipe jacking machine and a construction process thereof.

[0006] In the first aspect, the present application provides a pipe jacking machine, which adopts the following technical solution: A pipe jacking machine comprises a machine head and a center knife rotatably connected to the center of one end of the machine head, a rotating part for driving the center knife to rotate is provided on the machine head, a plurality of auxiliary knives uniformly distributed along the circumference of the machine head are rotatably connected to the end of the machine head close to the center knife, a driving shaft is fixedly connected to the end of the auxiliary knives close to the machine head, the driving shaft is inserted into the machine head, and a driving component for driving the driving shaft to rotate is provided in the machine head.

[0007] By adopting the above technical solution, the rotating part drives the center cutter to rotate, and at this time the auxiliary cutter is driven to rotate by the driving assembly, thereby facilitating the cutting of the soil layer parallel to the cross section of the machine head, reducing the possibility that the center cutter will have difficulty in quickly cutting the soil layer located in the circumference of the center cutter, and reducing the adverse effects on work efficiency.

[0008] Optionally, the number of auxiliary knives is four, the driving assembly includes a belt installed between two of the driving shafts, a belt is also installed between the other two driving shafts, and a first motor fixedly connected to the inner wall of the machine head is installed at one end of the belt.

[0009] By adopting the above technical solution, the first motor drives the drive shaft to rotate through the belt, thereby driving the auxiliary knife to rotate, which facilitates the cutting of the soil layer around the center knife, reduces the possibility that the soil layer around the center knife is difficult to cut quickly, and reduces the adverse impact on work efficiency.

[0010] Optionally, the driving shaft includes a shaft body fixed to the auxiliary knife and a control rod connected to the corresponding belt, the diameter of the control rod is larger than the diameter of the shaft body, and one end of the shaft body close to the corresponding belt is fixedly connected to a connecting rod with a square cross-section and facing the control rod, the end of the connecting rod is inserted into the control rod and slidably connected to the control rod, and a vibration component for driving the connecting rod to move is provided in the machine head.

[0011] By adopting the above technical solution, the first motor drives the control rod to rotate through the belt. At this time, the cross-sectional shape of the connecting rod enables the connecting rod to drive the shaft body and the auxiliary knife to rotate with the control rod. The vibration assembly drives the connecting rod to drive the shaft body and the auxiliary knife to move along the length direction of the connecting rod, so that the auxiliary knife rotates and vibrates in the direction close to or away from the soil layer, which further facilitates the crushing of the soil layer and improves work efficiency.

[0012] Optionally, the vibration assembly includes a vibration plate that is simultaneously sleeved on the outside of the shaft body and rotatably connected to the shaft body, a spring is sleeved on one end of the shaft body close to the connecting rod, one end of the spring is fixedly connected to the corresponding control rod, and the other end is fixedly connected to the vibration plate, one side of the vibration plate is always in contact with a cam, and a driving member for driving the cam to rotate is provided in the machine head.

[0013] By adopting the above technical solution, the driving member drives the cam to rotate and strike the vibration plate. At this time, the vibration plate drives the shaft body and the corresponding auxiliary knife to move in the direction away from the control rod under the drive of the cam. The spring is stretched. When the cam rotates down until the long axis is away from the vibration plate, the spring restores its deformation and drives the vibration plate to drive the auxiliary knife to move in the direction close to the control rod, thereby driving the auxiliary knife to rotate and vibrate at the same time, which is convenient for breaking the soil layer and improving work efficiency.

[0014] Optionally, the driving member includes a first bevel gear corresponding to the cam one by one and driving the cam to rotate, and one side of the first bevel gear is meshed with a second bevel gear sleeved on one of the control rods and fixedly connected to the corresponding control rod.

[0015] By adopting the above technical solution, when the first motor drives the control rod to rotate through the belt, the second bevel gear rotates with the corresponding control rod and drives the first bevel gear to drive the cam to rotate, which is convenient for driving the auxiliary knife to vibrate and break the soil layer, thereby improving work efficiency.

[0016] Optionally, a coaxial first gear is fixedly connected to one side of the first bevel gear, a second gear with a diameter smaller than that of the first gear is meshed with one side of the first gear, and the second gear is coaxial with the cam and fixedly connected to the cam.

[0017] By adopting the above technical solution, the first bevel gear drives the first gear to rotate. At this time, the second gear drives the cam to rotate under the drive of the first gear, and the diameter of the second gear is smaller than the diameter of the first gear, so that the vibration frequency of the auxiliary knife is greater than the rotation frequency of the auxiliary knife, which further facilitates the crushing of the soil layer and improves work efficiency.

[0018] Optionally, the end of the center cutter is fixedly connected to a coaxial rotating shaft, the rotating shaft is inserted into the machine head and rotatably connected to the machine head, and a second motor fixedly connected to the inner side wall of the machine head is installed at the end of the rotating shaft, and the machine head includes a cutter disc rotatably connected to the center cutter, and a crushing cylinder and a control cylinder are successively provided on the side of the cutter disc away from the center cutter, which are blocked at one end close to the cutter disc, the rotating shaft and the driving shaft both pass through the crushing cylinder and are inserted into the control cylinder at the same time, a screen plate parallel to the cutter disc is provided in the crushing cylinder, and a plurality of crushing teeth are fixedly connected to the rotating shaft and the driving shaft between the cutter disc and the screen plate in the circumferential direction, and a plurality of crushing edges are provided on the inner side wall of the crushing cylinder between the cutter disc and the screen plate, and a suction pipe connected to the inside of the crushing cylinder is fixedly connected to the lower side of the blocked end of the control cylinder.

[0019] By adopting the above technical solution, the second motor drives the rotating shaft to drive the central knife to rotate, and the first motor drives the auxiliary knife to rotate through the belt, and the crushed soil layer enters the crushing barrel. At this time, the rotating shaft and the driving shaft both rotate and drive the crushing teeth to rotate, thereby facilitating the crushing of the soil layer entering the crushing barrel, and the soil layer in the crushing barrel is further crushed when it hits the crushing edge on the inner wall of the crushing barrel. The crushed soil layer passes through the screen plate and is discharged through the suction pipe, thereby improving work efficiency.

[0020] Optionally, a limit ring is provided on the side of the cutter disc close to the crushing barrel, which is plugged in and rotatably connected to the crushing barrel; a driving ring is provided on the crushing barrel, which is plugged in and rotatably connected to the control barrel; the screen plate is rotatably connected to the inner wall of the crushing barrel; a third bevel gear is fixedly connected to one end of the crushing barrel close to the control barrel, and a connecting piece that drives the third bevel gear to rotate is provided on one of the first gears.

[0021] By adopting the above technical solution, the connecting part drives the third bevel gear to rotate and drives the driving change to drive the crushing barrel to rotate along the circumferential direction of the center cutter. At this time, the limit ring, the screen plate and the control barrel are all rotatably connected with the crushing barrel, and the crushing edges on the crushing barrel rotate with the crushing barrel, which further facilitates the crushing of the soil layer in the crushing barrel, and facilitates the crushing and discharge of the soil layer entering the crushing barrel, thereby improving work efficiency.

[0022] Optionally, the connecting member includes a third gear located between the first gear and the second gear, the first gear and the second gear are both meshed with the third gear, a fourth bevel gear is meshed on a side of the third bevel gear close to the first gear, and the fourth bevel gear is coaxial with the first gear and fixedly connected to the first gear.

[0023] By adopting the above technical solution, the first bevel gear drives the second bevel gear to rotate, thereby driving the first gear, the second gear, and the third gear to rotate. At this time, the fourth bevel gear fixed to the first gear drives the third bevel gear to drive the drive ring and the crushing barrel to rotate, thereby facilitating the driving of the crushing edge to rotate and crush the soil layer in the crushing barrel. The third gear makes the rotation direction of the crushing barrel opposite to the rotation direction of the corresponding auxiliary knife, which further facilitates the crushing teeth and crushing edges to throw up and crush the soil layer in the crushing barrel, thereby further improving work efficiency.

[0024] In a second aspect, the present application provides a construction process of a pipe jacking machine, which adopts the following technical solution: A construction process of a pipe jacking machine comprises the following steps: The machine head is inserted into the soil layer, and the rotating part drives the center cutter to rotate and cut the soil layer; The auxiliary cutter is driven to rotate and cut the soil layer in the circumferential direction of the central cutter through the driving assembly; The machine head is driven to move, at which time the cut soil layer enters the machine head and is discharged through the end of the machine head away from the center cutter.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: The rotating member drives the center cutter to rotate, and at this time, the auxiliary cutter is driven to rotate by the driving assembly, so as to facilitate cutting of the soil layer parallel to the cross section of the machine head, and reduce the possibility that the center cutter is difficult to quickly cut the soil layer located in the circumference of the center cutter; The first motor drives the control rod to rotate through the belt. At this time, the cross-sectional shape of the connecting rod enables the connecting rod to drive the shaft body and the auxiliary knife to rotate with the control rod. The vibration assembly drives the connecting rod to drive the shaft body and the auxiliary knife to move along the length direction of the connecting rod, so that the auxiliary knife rotates and vibrates in the direction close to or away from the soil layer, which is convenient for crushing the soil layer. The connecting piece drives the third bevel gear to rotate and drives the driving gear to drive the crushing barrel to rotate along the circumference of the center cutter. At this time, the limit ring, screen plate and control barrel are all connected to the crushing barrel in rotation, and the crushing edges on the crushing barrel rotate with the crushing barrel, which further facilitates the crushing of the soil layer in the crushing barrel and the crushing and discharge of the soil layer entering the crushing barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the pipe jacking machine in the embodiment of the present application.

[0027] Figure 2 It is a structural schematic diagram reflecting the positional relationship between the crushing cylinder and the control cylinder in the embodiment of the present application.

[0028] Figure 3 It is a structural schematic diagram showing the positional relationship between the crushing barrel and the drive assembly in the embodiment of the present application.

[0029] Figure 4 It is a structural schematic diagram showing the positional relationship between the control rod and the vibration assembly in the embodiment of the present application.

[0030] Description of the accompanying drawings: 1. Pipe jacking machine body; 11. Frame; 12. Top iron; 13. Hydraulic cylinder; 2. Machine head; 21. Cutter head; 211. Feeding port; 212. Center knife; 213. Auxiliary knife; 214. Limiting ring; 22. Crushing cylinder; 221. Screen plate; 222. Driving ring; 223. Third bevel gear; 23. Control cylinder; 231. Extraction pipe; 3. Rotating member; 31. Rotating shaft; 311. Crushing teeth; 32 , second motor; 4, drive shaft; 41, shaft body; 42, control rod; 43, connecting rod; 5, drive assembly; 51, belt; 52, first motor; 6, vibration assembly; 61, vibration plate; 62, spring; 63, cam; 64, driving member; 641, first bevel gear; 642, second bevel gear; 643, first gear; 644, second gear; 7, connecting member; 71, third gear; 72, fourth bevel gear. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with the accompanying drawings.

[0032] The present application embodiment discloses a pipe jacking machine. Figure 1 A pipe jacking machine includes a pipe jacking machine body 1 and a machine head 2. The pipe jacking machine body 1 includes a frame 11 adapted to the machine head 2. A horizontal top iron 12 is provided on one side of the frame 11 close to the machine head 2. Two symmetrically arranged hydraulic cylinders 13 are fixedly connected to one side of the frame 11 close to the top iron 12. The telescopic rod of the hydraulic cylinder 13 faces the top iron 12 and is fixedly connected to the side wall of the top iron 12. When in use, the telescopic rod of the hydraulic cylinder 13 continuously expands and contracts and pushes the machine head 2 to move through the top iron 12.

[0033] Reference Figure 1 and Figure 2 The machine head 2 includes a vertical cutter disc 21 located on the side of the top iron 12 away from the frame 11. A horizontal crushing barrel 22 and a control barrel 23 are sequentially arranged on the side of the cutter disc 21 close to the top iron 12. A plurality of evenly distributed feed ports 211 are opened in the cutter disc 21 and are connected to the inside of the crushing barrel 22. The end of the control barrel 23 away from the crushing barrel 22 is blocked, and the end of the crushing barrel 22 close to the control barrel 23 is blocked, and the end of the control barrel 23 close to the top iron 12 can abut against the top iron 12. A vertical sieve plate 221 is arranged inside the crushing barrel 22, and the side wall of the sieve plate 22 abuts against the inner side wall of the crushing barrel 22. A suction pipe 231 that passes through the blocked end of the crushing barrel 22 and is connected to the inside of the crushing barrel 22 is inserted and fixedly connected to the lower side of the blocked end of the control barrel 23.

[0034] Reference Figure 2 and Figure 3 , a horizontal center knife 212 is rotatably connected to the axis of the cutter disc 21 away from the crushing cylinder 22, and a rotating member 3 for driving the center knife 212 to rotate is provided in the control cylinder 23. A plurality of horizontal auxiliary knives 213 are evenly distributed along the circumference of the center knife 212 on the cutter disc 21. In the embodiment of the present application, four auxiliary knives are provided and all are rotatably connected to the cutter disc 21. A horizontal and coaxial drive shaft 4 is fixedly connected to the side of the auxiliary knives 213 close to the cutter disc 21. The drive shaft 4 passes through the cutter disc 21 and the screen plate 221 and is inserted into the control cylinder 23, and a drive assembly 5 for driving the drive shaft 4 to rotate is provided in the control cylinder 23.

[0035] The frame 11 is placed in the working pit. At this time, the side of the frame 11 away from the top iron 12 abuts against the side wall of the working pit, and the telescopic rod of the hydraulic cylinder 13 is extended and retracted, thereby pushing the head 2 away from one end of the cutter disc 21 through the top iron 12 and driving the head 2 to move until the center knife 212 and the auxiliary knife 213 are inserted into the soil layer. At this time, the center knife 212 is driven to rotate by the rotating part 3, and the auxiliary knife 213 is driven to rotate by the driving assembly 5, which is convenient for cutting the soil layer and reduces the possibility that the center knife 212 is difficult to quickly cut the soil layer located around the center knife 212. The head 2 is continued to be pushed to move by the hydraulic cylinder 13 and the top iron 12, and the center knife 212 and the auxiliary knife 213 continue to crush the soil layer. The crushed soil layer enters the crushing barrel 22 through the feed port 211 and passes through the screen plate 221 and is discharged through the suction pipe 231 until the excavation is completed.

[0036] Reference Figure 2 and Figure 3The driving assembly 5 includes a belt 51 installed at one end of two of the driving shafts 4 away from the cutter disc 21, and the other two driving shafts 4 are also installed with a belt 51 at one end away from the cutter disc 21, and one end of each of the belts 51 is installed with a first motor 52 fixedly connected to the inner side wall of the control cylinder 23. The rotating member 3 includes a horizontal rotating shaft 31 fixedly connected to the end of the center knife 212 close to the cutter disc 21 and passing through the cutter disc 21 and the screen plate 221 and inserted into the control cylinder 23, and the end of the rotating shaft 31 away from the cutter disc 21 is installed with a second motor 32 fixedly connected to the inner side wall of the control cylinder 23.

[0037] The second motor 32 drives the rotating shaft 31 to drive the central cutter 212 to rotate, and the first motor 52 drives the driving shaft 4 through the belt 51 to drive the auxiliary cutter 213 to rotate, so as to facilitate cutting of the soil layer in the circumferential direction of the central cutter 212.

[0038] Reference Figure 2 and Figure 3 The driving shaft 4 includes a shaft body 41 fixedly connected to the corresponding auxiliary knife 213 and a control rod 42 connected to the belt 51, and the end of the shaft body 41 close to the control rod 42 is fixedly connected to a connecting rod 43 facing the control rod 42 and having a square cross section. The connecting rod 43 and the control rod 42 are always located in the control cylinder 23, and the connecting rod 43 is inserted into the control rod 42 and slidably connected to the control rod 42 along the length direction of the control rod 42. The end of the shaft body 41 close to the auxiliary knife 213 is slidably and rotatably connected to the cutter disc 21, and a vibration component 6 for driving the connecting rod 43 to move is provided in the control cylinder 23.

[0039] A plurality of evenly distributed crushing teeth 311 are fixedly connected to the outer side of one end of the rotating shaft 31 located between the cutter disc 21 and the screen plate 221, a plurality of evenly distributed crushing teeth 311 are also fixedly connected to the circumference of one end of the shaft body 41 located between the cutter disc 21 and the screen plate 221, and a plurality of evenly distributed crushing edges (not shown in the figure) are fixedly connected to the inner wall of one end of the crushing barrel 22 located between the cutter disc 21 and the screen plate 221.

[0040] The first motor 52 drives the control rod 42 to rotate through the belt 51. The cross-sectional shape of the connecting rod 43 enables the connecting rod 43 to drive the shaft body 41 and the auxiliary knife 213 to rotate along with the control rod 42. The vibration component 6 drives the connecting rod 43 to drive the shaft body 41 and the auxiliary knife 213 to move along the length direction of the connecting rod 43, so that the auxiliary knife 213 rotates and vibrates in the direction of approaching or moving away from the soil layer, further facilitating the crushing of the soil layer, and the crushed soil layer enters the crushing barrel 22. At this time, the rotating shaft 31 and the driving shaft 4 both rotate and drive the crushing teeth 311 to rotate, and the soil layer in the crushing barrel 22 hits the crushing edge on the inner wall of the crushing barrel 22 and is further crushed.

[0041] Reference Figure 2 , Figure 3 and Figure 4 The vibration assembly 6 includes a vibration plate 61 which is sleeved on four shaft bodies 41 and is rotatably connected to the shaft bodies 41. The vibration plate 61 is located in the control cylinder 23 and is slidably and rotatably connected to the rotating shaft 31. A spring 62 is sleeved on one end of the shaft body 41 close to the control rod 42. One end of the spring 62 is fixedly connected to the vibration plate 61, and the other end is fixedly connected to the corresponding control rod 42. When the spring 62 is at its original length, the end of the shaft body 41 away from the control rod 42 is flush with the side of the cutter disc 21 away from the crushing cylinder 22. The side of the vibration plate 61 away from the cutter disc 21 is always in contact with a cam 63, and a driving member 64 for driving the cam 63 to rotate is provided in the control cylinder 23.

[0042] The driving member 64 includes a first bevel gear 641 corresponding to the cam 63 and driving the cam 63 to rotate. The first bevel gear 641 is meshed with a second bevel gear 642 on one side close to the control rod 42 and is sleeved and fixedly connected to one of the control rods 42. A coaxial first gear 643 is fixedly connected to one side of the first bevel gear 641, and a second gear 644 having a smaller diameter than the first gear 643 is fixedly connected to one side of the cam 63. The first gear 643 can drive the second gear 644 to rotate.

[0043] When the first motor 52 drives the control rod 42 to rotate through the belt 51, the second bevel gear 642 rotates with the corresponding control rod 42 and drives the first bevel gear 641 to drive the first gear 643 to rotate. At this time, the second gear 644 drives the cam 63 to rotate and knock the vibration plate 61 under the drive of the first gear 643. At this time, the vibration plate 61 drives the shaft body 41 and the corresponding auxiliary knife 213 to move in the direction away from the control rod 42 under the drive of the cam 63. The spring 62 is stretched. When the cam 63 rotates down until the major axis is away from the vibration plate 61, the spring 62 recovers its deformation and drives the vibration plate 61 to drive the auxiliary knife 213 to move in the direction close to the control rod 42, thereby driving the auxiliary knife 213 to rotate and vibrate at the same time, which is convenient for breaking the soil layer. The diameter of the second gear 644 is smaller than the diameter of the first gear 643, so that the frequency of vibration of the auxiliary knife 213 is greater than the frequency of rotation of the auxiliary knife 213, which is further convenient for breaking the soil layer.

[0044] Reference Figure 2 , Figure 3 and Figure 4A limiting ring 214 is fixedly connected to the side of the cutter head 21 close to the crushing cylinder 22, which is inserted into the side wall of the crushing cylinder 22 and is coaxial with the crushing cylinder 22 and rotatably connected. The cross-sectional width of the limiting ring 214 close to the crushing cylinder 22 is greater than the cross-sectional width close to the cutter head 21. A driving ring 222 whose outer diameter is smaller than the outer diameter of the control cylinder 23 and is coaxial with the control cylinder 23 is fixedly connected to the end of the crushing cylinder 22 close to the control cylinder 23. The crushing cylinder 22 is rotatably connected to the control cylinder 23 by inserting the driving ring 222 into the control cylinder 23. A third bevel gear 223 is fixedly connected to one end of the crushing cylinder 22 and close to the control cylinder 23. A connecting member 7 for driving the third bevel gear 223 to rotate is provided in the control cylinder 23.

[0045] Reference Figure 3 and Figure 4 The connecting member 7 includes a third gear 71 meshed with the second gear 644 on the side close to the corresponding first gear 643, the first gear 643 meshes with the third gear 71, and the first gear 643 is fixedly connected to the side close to the third bevel gear 223 with a fourth bevel gear 72 which is coaxial and plugged and rotatably connected to the control cylinder 23, and the fourth bevel gear 72 meshes with the third bevel gear 223.

[0046] The first bevel gear 641 drives the second bevel gear 642 to rotate, thereby driving the first gear 643, the second gear 644, and the third gear 71 to rotate. At this time, the fourth bevel gear 72 fixed to the first gear 643 drives the third bevel gear 223 to drive the drive ring 222 and the crushing barrel 22 to rotate, so as to drive the crushing edge to rotate and crush the soil layer in the crushing barrel 22. The third gear 71 makes the rotation direction of the crushing barrel 22 opposite to the rotation direction of the corresponding auxiliary knife 213, which further facilitates the crushing teeth 311 and the crushing edges to throw up and crush the soil layer in the crushing barrel 22.

[0047] The implementation principle of a pipe jacking machine in an embodiment of the present application is: the frame 11 is placed in the working well, the telescopic rod of the hydraulic cylinder 13 is extended and the machine head 2 is pushed to move through the jacking iron 12 until the center knife 212 and the auxiliary knife 213 are inserted into the soil layer, at this time, the center knife 212 and the auxiliary knife 213 are driven to rotate to facilitate cutting of the soil layer, and the machine head 2 is continued to be pushed to move by the hydraulic cylinder 13 and the jacking iron 12, and the center knife 212 and the auxiliary knife 213 continue to crush the soil layer, and the crushed soil layer passes through the screen plate 221 and is discharged through the extraction pipe 231 until the excavation is completed.

[0048] The embodiment of the present application also discloses a construction process of a pipe jacking machine. A construction process of a pipe jacking machine includes the following steps: The frame 11 is placed in the working pit, at which time the side of the frame 11 away from the top iron 12 abuts against the side wall of the working pit, and the telescopic rod of the hydraulic cylinder 13 is extended, thereby pushing the machine head 2 away from one end of the cutter disc 21 through the top iron 12 and driving the machine head 2 to move until the center knife 212 and the auxiliary knife 213 are inserted into the soil layer, driving the center knife 212 to rotate and cut the soil layer; Drive the auxiliary knife 213 to rotate and cut the soil layer in the circumferential direction of the center knife 212; The hydraulic cylinder 13 and the top iron 12 continue to push the machine head 2 to move, and the central knife 212 and the auxiliary knife 213 continue to crush the soil layer, and the crushed soil layer enters the crushing barrel 22; The crushing teeth 311 and crushing edges in the crushing barrel 22 further crush the soil layer entering the crushing barrel 22 , and the crushed soil layer passes through the screen plate 221 and is discharged through the extraction pipe 231 .

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pipe jacking machine, characterized in that: The invention comprises a machine head (2) and a center knife (212) rotatably connected at the center of one end of the machine head (2); a rotating member (3) for driving the center knife (212) to rotate is provided on the machine head (2); one end of the machine head (2) close to the center knife (212) is rotatably connected to a plurality of auxiliary knives (213) evenly distributed along the circumference of the machine head (2); one end of the auxiliary knives (213) close to the machine head (2) is fixedly connected to a drive shaft (4); the drive shaft (4) is inserted into the machine head (2); and a drive assembly (5) for driving the drive shaft (4) to rotate is provided in the machine head (2).

2. A pipe jacking machine according to claim 1, characterized in that: The number of auxiliary knives (213) is four, the driving assembly (5) comprises a belt (51) installed between two of the driving shafts (4), a belt (51) is also installed between the other two driving shafts (4), and a first motor (52) fixedly connected to the inner side wall of the machine head (2) is installed at one end of each belt (51).

3. A pipe jacking machine according to claim 2, characterized in that: The driving shaft (4) comprises a shaft body (41) fixed to the auxiliary knife (213) and a control rod (42) connected to the corresponding belt (51); the diameter of the control rod (42) is larger than the diameter of the shaft body (41); one end of the shaft body (41) close to the corresponding belt (51) is fixedly connected to a connecting rod (43) with a square cross-section and facing the control rod (42); the end of the connecting rod (43) is inserted into the control rod (42) and is slidably connected to the control rod (42); and a vibration component (6) for driving the connecting rod (43) to move is provided in the machine head (2).

4. A pipe jacking machine according to claim 3, characterized in that: The vibration assembly (6) comprises a vibration plate (61) which is sleeved on the outside of the shaft body (41) and is rotatably connected to the shaft body (41); a spring (62) is sleeved on one end of the shaft body (41) close to the connecting rod (43); one end of the spring (62) is fixedly connected to the corresponding control rod (42), and the other end is fixedly connected to the vibration plate (61); one side of the vibration plate (61) is always in contact with a cam (63); and a driving member (64) for driving the cam (63) to rotate is provided in the machine head (2).

5. A pipe jacking machine according to claim 4, characterized in that: The driving member (64) comprises a first bevel gear (641) corresponding one-to-one to the cam (63) and driving the cam (63) to rotate, and one side of each of the first bevel gears (641) is meshed with a second bevel gear (642) sleeved on one of the control rods (42) and fixedly connected to the corresponding control rod (42).

6. A pipe jacking machine according to claim 5, characterized in that: A coaxial first gear (643) is fixedly connected to one side of the first bevel gear (641), a second gear (644) having a smaller diameter than the first gear (643) is meshed with one side of the first gear (643), and the second gear (644) is coaxial with the cam (63) and fixedly connected to the cam (63).

7. A pipe jacking machine according to claim 6, characterized in that: The end of the central knife (212) is fixedly connected to a coaxial rotating shaft (31), the rotating shaft (31) is inserted into the machine head (2) and is rotatably connected to the machine head (2), the end of the rotating shaft (31) is mounted with a second motor (32) fixedly connected to the inner side wall of the machine head (2), the machine head (2) comprises a cutter disc (21) rotatably connected to the central knife (212), and a side of the cutter disc (21) away from the central knife (212) is provided with a plurality of The crushing cylinder (22) and the control cylinder (23) are sealed at one end thereof, the rotating shaft (31) and the driving shaft (4) both pass through the crushing cylinder (22) and are inserted into the control cylinder (23) at the same time, a screen plate (221) parallel to the cutter disc (21) is provided in the crushing cylinder (22), a plurality of crushing teeth (311) are fixedly connected to the rotating shaft (31) and the driving shaft (4) between the cutter disc (21) and the screen plate (221) in the circumferential direction, a plurality of crushing edges are provided on the inner side wall of the crushing cylinder (22) between the cutter disc (21) and the screen plate (221), and a material extraction pipe (231) communicating with the interior of the crushing cylinder (22) is fixedly connected to the lower side of the sealed end of the control cylinder (23).

8. A pipe jacking machine according to claim 7, characterized in that: A limiting ring (214) plugged into and rotatably connected to the crushing barrel (22) is provided on one side of the cutter disc (21) close to the crushing barrel (22); a driving ring (222) plugged into and rotatably connected to the control barrel (23) is provided on the crushing barrel (22); the screen plate (221) is rotatably connected to the inner wall of the crushing barrel (22); a third bevel gear (223) is fixedly connected to one end of the crushing barrel (22) close to the control barrel (23); and a connecting member (7) for driving the third bevel gear (223) to rotate is provided on one of the first gears (643).

9. A pipe jacking machine according to claim 8, characterized in that: The connecting member (7) comprises a third gear (71) located between the first gear (643) and the second gear (644); the first gear (643) and the second gear (644) are both meshed with the third gear (71); a fourth bevel gear (72) is meshed on a side of the third bevel gear (223) close to the first gear (643); the fourth bevel gear (72) is coaxial with the first gear (643) and is fixedly connected to the first gear (643).

10. A construction process using the pipe jacking machine according to any one of claims 1 to 9, characterized in that: The following steps are involved: The machine head (2) is inserted into the soil layer, and the rotating member (3) drives the center cutter (212) to rotate and cut the soil layer; The auxiliary knife (213) is driven by the driving assembly (5) to rotate and cut the soil layer in the circumferential direction of the central knife (212); The machine head (2) is driven to move, and the soil layer that has been cut enters the machine head (2) and is discharged through an end of the machine head (2) away from the center knife (212).

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