Roadheader and screw conveyor

Abstract

The present invention relates to the technical field of tunnel construction equipment, and in particular to a tunnel boring machine and a screw conveyor thereof. The screw conveyor comprises a first barrel section, a second barrel section, a first screw shaft, and a second screw shaft; a stopper is fixed on the side wall of the slot, and is used to cooperate with a connector in the front-rear direction. In the screw conveyor of the present invention, the first barrel section and the second barrel section can swing relative to each other, and the relative angle between the two is adjustable, and the first screw shaft and the second screw shaft are circumferentially stop-rotated and axially stop-slip connected, and the movable gap between the slot and the connector satisfies the adjustment of the angle between the first screw shaft and the second screw shaft. When arranging the screw conveyor, the angle between the first barrel section and the second barrel section can be changed as needed, and then the posture of the screw conveyor can be adjusted, which can reduce the difficulty of arranging the screw conveyor and solve the technical problem that the current screw conveyor is difficult to design when used in a small-diameter tunnel boring machine or a small turning radius tunnel boring machine.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction equipment, in particular to a tunnel boring machine and a screw conveyor thereof. Background Art

[0002] When using an earth pressure balance tunnel boring machine for tunnel construction, the excavation needs to be carried out through a screw conveyor to discharge the debris. It is one of the indispensable key components of the tunnel boring machine. The screw conveyor is arranged obliquely at the front of the tunnel boring machine, and the front end extends into the lower part of the soil bin. The debris is transported to the belt conveyor through the angle between the screw conveyor and the tunnel boring machine, and then discharged out of the tunnel. The screw conveyor runs through the front of the tunnel boring machine and passes through several key components of the tunnel boring machine. Due to the location of the key components inside the tunnel boring machine, the layout of the screw conveyor is greatly restricted in space and it is easy to interfere with other components. In small-diameter tunnel boring machines or tunnel boring machines with a small turning radius, the space inside the tunnel boring machine is smaller. The current design of screw conveyors for use in small-diameter tunnel boring machines or tunnel boring machines with a small turning radius is difficult. Summary of the invention

[0003] The object of the present invention is to provide a screw conveyor for solving the technical problem that the current screw conveyors are difficult to design when used in small-diameter tunnel boring machines or small-turning-radius tunnel boring machines; in addition, the object of the present invention is also to provide a tunnel boring machine using the above-mentioned screw conveyor for solving the technical problem that the current screw conveyors are difficult to design in tunnel boring machines.

[0004] The screw conveyor of the present invention adopts the following technical scheme:

[0005] The screw conveyor includes:

[0006] The first tube section extends forward and backward;

[0007] The second cylinder section is located at the rear side of the first cylinder section and can swing relative to the first cylinder section;

[0008] A first screw shaft is disposed in the first cylinder section;

[0009] A second spiral shaft is disposed in the second cylinder section;

[0010] One of the rear end of the first spiral shaft and the front end of the second spiral shaft is provided with a slot, and the other is provided with a connector inserted into the slot along the front-to-back direction, and the movable gap between the slot and the connector meets the adjustment of the angle between the first spiral shaft and the second spiral shaft; a stopper is fixed on the groove side wall of the slot and is used to stop and cooperate with the connector in the front-to-back direction to achieve a stopper connection between the rear end of the first spiral shaft and the front end of the second spiral shaft in the axial direction;

[0011] The slot and the connector are locked in a circumferential direction for transmitting torque, or the locking piece and the connector are locked in a circumferential direction for transmitting torque.

[0012] Beneficial effects: In the screw conveyor of the present invention, the first barrel section and the second barrel section can swing relative to each other, and the relative angle between the two is adjustable. The first screw shaft and the second screw shaft are circumferentially fixed and axially fixed, and the movable gap between the slot and the connector meets the adjustment of the angle between the first screw shaft and the second screw shaft, so that during the process of adjusting the angle between the first barrel section and the second barrel section, the angle between the first screw shaft and the second screw shaft changes accordingly. When arranging the screw conveyor, the angle between the first barrel section and the second barrel section can be changed as needed, thereby adjusting the posture of the screw conveyor, which can reduce the difficulty of arranging the screw conveyor and solve the technical problem of high design difficulty when the current screw conveyor is used in a small-diameter tunnel boring machine or a small turning radius tunnel boring machine.

[0013] Furthermore, the slot is a polygonal slot, and the outer peripheral surface of the connector is a polygonal cylinder that cooperates with the inner wall surface of the slot to transmit torque. The polygonal slot has a better anti-rotation effect.

[0014] Furthermore, the slot is a hexagonal slot, and the outer peripheral surface of the connector is a hexagonal prism surface.

[0015] Furthermore, at least two anti-slipping members are provided, and the anti-slipping members are fixed on the groove side wall of the polygonal groove. Providing at least two anti-slipping members can improve the anti-slipping effect.

[0016] Furthermore, the anti-slipping piece is an anti-slipping pin threadedly fixed on the slot wall, which is convenient for installing the anti-slipping piece.

[0017] Furthermore, the connector is provided with a stopper fitting groove for inserting the stopper, the stopper fitting groove is a long groove extending forward and backward, the stopper can move forward and backward in the long groove, and is used to stop and cooperate with the inner wall surface of the groove at the end of the long groove, so as to reduce the influence of the stopper on the angle adjustment of the first screw shaft and the second screw shaft.

[0018] Furthermore, the first cylinder section and the second cylinder section are connected via a joint bearing, which is relatively flexible and convenient for adjusting the angles of the first cylinder section and the second cylinder section.

[0019] Furthermore, the screw conveyor includes an adjusting cylinder, which includes a cylinder body and a piston rod, one of which is movably arranged on the first cylinder section, and the other is movably arranged on the second cylinder section. By controlling the adjusting cylinder, the angle between the first cylinder section and the second cylinder section can be adjusted.

[0020] Furthermore, the first cylinder section is connected to the second cylinder section via a joint bearing, the outer ring of the joint bearing is fixed to the first cylinder section, and the piston rod of the adjusting cylinder is hinged on the outer ring of the joint bearing.

[0021] The technical solution of the tunnel boring machine of the present invention:

[0022] The tunnel boring machine includes a cutter head and a soil bin at the rear of the cutter head, and also includes a screw conveyor extending into the soil bin for conveying the soil outward; the screw conveyor includes:

[0023] The first tube section extends forward and backward;

[0024] The second cylinder section is located at the rear side of the first cylinder section and can swing relative to the first cylinder section;

[0025] A first screw shaft is disposed in the first cylinder section;

[0026] A second spiral shaft is disposed in the second cylinder section;

[0027] One of the rear end of the first spiral shaft and the front end of the second spiral shaft is provided with a slot, and the other is provided with a connector inserted into the slot along the front-to-back direction, and the movable gap between the slot and the connector meets the adjustment of the angle between the first spiral shaft and the second spiral shaft; a stopper is fixed on the groove side wall of the slot and is used to stop and cooperate with the connector in the front-to-back direction to achieve a stopper connection between the rear end of the first spiral shaft and the front end of the second spiral shaft in the axial direction;

[0028] The slot and the connector are locked in a circumferential direction for transmitting torque, or the locking piece and the connector are locked in a circumferential direction for transmitting torque.

[0029] Beneficial effects: In the screw conveyor of the present invention, the first barrel section and the second barrel section can swing relative to each other, and the relative angle between the two is adjustable. The first screw shaft and the second screw shaft are circumferentially fixed and axially fixed, and the movable gap between the slot and the connector meets the adjustment of the angle between the first screw shaft and the second screw shaft, so that during the process of adjusting the angle between the first barrel section and the second barrel section, the angle between the first screw shaft and the second screw shaft changes accordingly. When arranging the screw conveyor, the angle between the first barrel section and the second barrel section can be changed as needed, thereby adjusting the posture of the screw conveyor, which can reduce the difficulty of arranging the screw conveyor and solve the technical problem of high design difficulty when the current screw conveyor is used in a small-diameter tunnel boring machine or a small turning radius tunnel boring machine.

[0030] Furthermore, the slot is a polygonal slot, and the outer peripheral surface of the connector is a polygonal cylinder that cooperates with the inner wall surface of the slot to transmit torque. The polygonal slot has a better anti-rotation effect.

[0031] Furthermore, the slot is a hexagonal slot, and the outer peripheral surface of the connector is a hexagonal prism surface.

[0032] Furthermore, at least two anti-slipping members are provided, and the anti-slipping members are fixed on the groove side wall of the polygonal groove. Providing at least two anti-slipping members can improve the anti-slipping effect.

[0033] Furthermore, the anti-slipping piece is an anti-slipping pin threadedly fixed on the slot wall, which is convenient for installing the anti-slipping piece.

[0034] Furthermore, the connector is provided with a stopper fitting groove for inserting the stopper, the stopper fitting groove is a long groove extending forward and backward, the stopper can move forward and backward in the long groove, and is used to stop and cooperate with the inner wall surface of the groove at the end of the long groove, so as to reduce the influence of the stopper on the angle adjustment of the first screw shaft and the second screw shaft.

[0035] Furthermore, the first cylinder section and the second cylinder section are connected via a joint bearing, which is relatively flexible and convenient for adjusting the angles of the first cylinder section and the second cylinder section.

[0036] Furthermore, the screw conveyor includes an adjusting cylinder, which includes a cylinder body and a piston rod, one of which is movably arranged on the first cylinder section, and the other is movably arranged on the second cylinder section. By controlling the adjusting cylinder, the angle between the first cylinder section and the second cylinder section can be adjusted.

[0037] Furthermore, the first cylinder section is connected to the second cylinder section via a joint bearing, the outer ring of the joint bearing is fixed to the first cylinder section, and the piston rod of the adjusting cylinder is hinged on the outer ring of the joint bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of a screw conveyor in a specific embodiment 1 of the present invention;

[0039] Figure 2 yes Figure 1 Schematic diagram of some structures in ;

[0040] Figure 3 is a cross-sectional view of the connection between the first screw shaft and the second screw shaft in the specific embodiment 1 of the screw conveyor of the present invention;

[0041] Figure 4 It is a longitudinal cross-sectional view of the connection between the first screw shaft and the second screw shaft in the specific embodiment 1 of the screw conveyor of the present invention;

[0042] Figure 5 is a cross-sectional view of the connection between the first screw shaft and the second screw shaft in the specific embodiment 2 of the screw conveyor of the present invention;

[0043] In the figure: 1. first cylinder section; 11. outer ring fixing flange; 2. second cylinder section; 21. inner ring fixing flange; 3. spherical bearing; 31. inner ring; 32. outer ring; 4. adjusting cylinder; 41. cylinder body; 42. piston rod; 5. first screw shaft; 51. slot; 6. second screw shaft; 61. connector; 62. anti-slip fitting groove; 7. spiral blade; 8. anti-slip pin. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0046] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0047] The directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", etc. are assumed directions or positional relationships and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0048] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0049] Specific embodiment 1 of the screw conveyor of the present invention:

[0050] like Figure 1As shown, the screw conveyor includes a first barrel segment 1 and a second barrel segment 2, the two barrel segments extend forward and backward, the inlet of the screw conveyor is on the first barrel segment 1, and the outlet is on the second barrel segment 2. In this embodiment, the first barrel segment 1 and the second barrel segment 2 are connected by a joint bearing 3, so that the second barrel segment 2 and the first barrel segment 1 can swing relative to each other, and then the posture of the screw conveyor can be adjusted according to needs, so that the screw conveyor can adapt to more installation conditions.

[0051] like Figure 1 and Figure 2 As shown, the spherical bearing 3 includes an inner ring 31 and an outer ring 32. The inner ring 31 is fixed to the front end of the second cylinder segment 2. The front end of the second cylinder segment 2 is provided with an inner ring fixing flange 21. The inner ring 31 is fixed to the inner ring fixing flange 21 by bolts.

[0052] The outer ring 32 is fixed to the rear end of the first cylinder segment 1 . The rear end of the first cylinder segment 1 is provided with an outer ring fixing flange 11 . The outer ring 32 is fixed to the outer ring fixing flange 11 by bolts.

[0053] In order to facilitate the adjustment of the angles of the two barrel sections of the screw conveyor, the screw conveyor includes an adjustment cylinder 4. In this embodiment, the adjustment cylinder 4 is an oil cylinder. The adjustment cylinder 4 includes a cylinder body 41 and a piston rod 42. The cylinder body 41 is hinged on the outer wall of the second barrel section 2, and the piston rod 42 is hinged on the outer ring 32 of the spherical bearing 3. The adjustment cylinder 4 facilitates the adjustment of the angles of the first barrel section 1 and the second barrel section 2. In other embodiments, the piston rod can also be directly hinged on the outer wall of the first barrel section. In other embodiments, the adjustment cylinder can also be a gas cylinder.

[0054] The screw conveyor includes a first screw shaft 5 in the first barrel section 1 and a second screw shaft 6 in the second barrel section 2. The first screw shaft 5 is movably connected to the second screw shaft 6. The connection between the first screw shaft 5 and the second screw shaft 6 corresponds to the position of the joint bearing 3, so that when the angle between the first barrel section 1 and the second barrel section 2 is adjusted, the angle between the first screw shaft 5 and the second screw shaft 6 changes accordingly, thereby ensuring the conveying efficiency of the screw conveyor. In this embodiment, the first screw shaft 5 and the second screw shaft 6 both include a shaft body and a spiral blade 7 fixed on the shaft body. The spiral blade 7 and the shaft body can be a split structure or can be integrally processed.

[0055] like Figures 2 to 4As shown, in this embodiment, a slot 51 is provided at the rear end of the first screw shaft 5, and a connector 61 is provided at the front end of the second screw shaft 6. The connector 61 is inserted into the slot 51 and is used to cooperate with the slot 51 in a circumferential direction to transmit torque. In this embodiment, the slot 51 is an inner hexagonal slot, the connector 61 is an outer hexagonal connector, and the outer peripheral surface of the connector 61 is a hexagonal prism surface. There is a large movable gap between the slot 51 and the connector 61. The movable gap between the slot 51 and the connector 61 satisfies the adjustment of the angle between the first screw shaft 5 and the second screw shaft 6, so that the angle between the first screw shaft 5 and the second screw shaft 6 can adapt to the change of the angle between the first barrel section 1 and the second barrel section 2.

[0056] In order to prevent the first screw shaft 5 from being separated from the second screw shaft 6, a stop pin 8 is threadedly fixed on the groove wall of the slot 51, and the stop pin 8 is used to cooperate with the connector 61 in the axial direction to achieve an axial stop connection between the rear end of the first screw shaft 5 and the front end of the second screw shaft 6, thereby preventing the first screw shaft 5 from being separated from the second screw shaft 6. In this embodiment, the stop pin 8 constitutes a stop member for stopping and cooperating with the connector 61 in the front-to-back direction. The stop pin includes a threaded section threadedly fixed on the groove wall of the slot and a stop section extending into the stop member mating groove, and the outer peripheral surface of the stop section is a smooth surface. In this embodiment, the circumferential movable gap between the stop pin and the connector is larger than the circumferential movable gap between the slot and the connector, so that the slot and the connector can stop the transmission of torque.

[0057] In this embodiment, five anti-slip pins 8 are provided, which are respectively arranged on five groove side walls of the inner hexagonal groove, and the spiral blade 7 on the first spiral shaft 5 extends to the remaining groove side wall of the inner hexagonal groove.

[0058] The connecting head 61 is provided with a locking member mating groove 62 which cooperates with the locking pin 8. The locking member mating groove 62 is a long groove extending forward and backward. When the angle of the first screw shaft 5 and the second screw shaft 6 is adjusted, the locking pin 8 can slide forward and backward in the locking member mating groove 62, and the locking pin can swing relative to the locking member mating groove so that the locking pin 8 does not affect the adjustment of the angle of the first screw shaft 5 and the second screw shaft 6.

[0059] The first screw shaft 5 and the second screw shaft 6 of the screw conveyor of the present invention are connected by a connector 61 and a slot 51. The movable gap between the connector 61 and the slot 51 is large, the precision requirement is low, and it can adapt to relatively harsh environments.

[0060] When the first screw shaft 5 and the second screw shaft 6 are assembled, the connector 61 is inserted into the slot 51 , and then the locking pin 8 is screwed into the corresponding locking member matching groove 62 .

[0061] Specific embodiment 2 of the screw conveyor of the present invention, the difference between the screw conveyor in this embodiment and the above specific embodiment is only that:

[0062] In the present embodiment, six anti-slip pins are provided, and the six anti-slip pins are respectively provided on the six groove wall sides of the slot. In the present embodiment, the spiral blade does not extend to the position of the slot. In other embodiments, the number of anti-slip pins can be increased or decreased according to the needs of installation, for example, three or four anti-slip pins can be provided, or two anti-slip pins can be provided on one groove side wall. In other embodiments, a circumferential annular groove can also be provided on the connector to cooperate with the anti-slip pin, and at this time, each anti-slip pin can share a circumferential annular groove. In other embodiments, in addition to the anti-slip pin, the anti-slip member can also be an anti-slip plate fixed on the rear end face of the first spiral shaft 5, and the second spiral shaft is provided with a groove or an annular protrusion corresponding to the anti-slip plate. In other embodiments, in addition to the groove, the anti-slip member can also be cooperated with a protrusion.

[0063] In other embodiments, the inner hexagonal groove may also be a pentagonal groove, a quadrilateral groove or other polygonal grooves; of course, it may also be a special-shaped groove or an elliptical groove.

[0064] In other embodiments, more than one anti-slip member may be provided to meet the use requirements.

[0065] Specific embodiment 3 of the screw conveyor of the present invention, the screw conveyor in this embodiment is different from the above specific embodiments only in that:

[0066] In this embodiment, the first cylinder segment and the second cylinder segment are connected by a flexible metal braided cylinder so that the first cylinder segment and the second cylinder segment can swing relative to each other.

[0067] The specific embodiment 4 of the screw conveyor of the present invention is that the screw conveyor in this embodiment is different from the above specific embodiments only in that: in this embodiment, the screw conveyor has three cylinder sections with adjustable angles, while in other embodiments, more than four cylinder sections can be provided.

[0068] Specific embodiment 5 of the screw conveyor of the present invention, the difference between the screw conveyor in this embodiment and the above specific embodiment is only that: Figure 5 As shown, in this embodiment, the circumferential gap between the anti-slip pin 8 and the anti-slip member matching groove 62 of the connecting head 61 is smaller than the circumferential movable gap between the slot 51 and the connecting head 61. At this time, the anti-slip pin 8 and the connecting head 61 are anti-rotationally matched to transmit torque.

[0069] A specific embodiment of the tunnel boring machine of the present invention includes a cutter disc and a soil bin located at the rear side of the cutter disc, and also includes a screw conveyor extending into the soil bin for conveying debris outward. The screw conveyor has the same structure as described in any specific embodiment of the screw conveyor mentioned above, and the details will not be repeated here.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. Screw conveyor, characterized in that, include: The first tube section extends forward and backward; The second cylinder section is located at the rear side of the first cylinder section and can swing relative to the first cylinder section; A first screw shaft is disposed in the first cylinder section; A second spiral shaft is disposed in the second cylinder section; One of the rear end of the first spiral shaft and the front end of the second spiral shaft is provided with a slot, and the other is provided with a connector inserted into the slot along the front-back direction, and the movable gap between the slot and the connector satisfies the adjustment of the angle between the first spiral shaft and the second spiral shaft; A stopper, fixed on the side wall of the slot, is used to cooperate with the connector in the front-to-back direction to achieve a stopper connection between the rear end of the first screw shaft and the front end of the second screw shaft in the axial direction; The circumferential movable gap between the anti-slip piece and the connecting head is smaller than the circumferential movable gap between the slot and the connecting head, so that the anti-slip piece and the connecting head can be matched in a circumferential direction of the connecting head to prevent rotation for transmitting torque. The connecting head is provided with an anti-slip piece matching groove for inserting the anti-slip piece, and the anti-slip piece matching groove is a long groove extending forward and backward. The anti-slip piece can move forward and backward in the long groove, and is used to stop and cooperate with the inner wall surface of the groove at the end of the long groove. The anti-slip piece and the anti-slip piece matching groove have an movable gap in the circumferential direction of the connecting head. The anti-slipping piece is an anti-slipping pin which is threadedly fixed on the groove wall of the slot.

2. The screw conveyor according to claim 1, characterized in that: The slot is a polygonal slot, and the outer peripheral surface of the connector is a polygonal cylinder that matches the inner wall surface of the slot.

3. The screw conveyor according to claim 2, characterized in that: The slot is a hexagonal slot, and the outer peripheral surface of the connector is a hexagonal prism surface.

4. The screw conveyor according to claim 2, characterized in that: At least two anti-slipping members are provided, and the anti-slipping members are fixed on the groove side walls of the polygonal groove.

5. The screw conveyor according to any one of claims 1 to 4, characterized in that: The first cylinder section is connected to the second cylinder section via a spherical bearing.

6. The screw conveyor according to any one of claims 1 to 4, characterized in that: The screw conveyor comprises an adjusting cylinder, which comprises a cylinder body and a piston rod. One of the cylinder body and the piston rod is movably arranged on the first cylinder section, and the other is movably arranged on the second cylinder section.

7. The screw conveyor according to claim 6, characterized in that: The first cylinder section is connected to the second cylinder section via a joint bearing, the outer ring of the joint bearing is fixed to the first cylinder section, and the piston rod of the adjusting cylinder is hinged on the outer ring of the joint bearing.

8. Screw conveyor, characterized in that, include: The first tube section extends forward and backward; The second cylinder section is located at the rear side of the first cylinder section and can swing relative to the first cylinder section; A first screw shaft is disposed in the first cylinder section; A second spiral shaft is disposed in the second cylinder section; One of the rear end of the first spiral shaft and the front end of the second spiral shaft is provided with a slot, and the other is provided with a connector inserted into the slot along the front-back direction, and the movable gap between the slot and the connector satisfies the adjustment of the angle between the first spiral shaft and the second spiral shaft; A stopper, fixed on the side wall of the slot, is used to cooperate with the connector in the front-to-back direction to achieve a stopper connection between the rear end of the first screw shaft and the front end of the second screw shaft in the axial direction; The connecting head is provided with a locking member mating groove for inserting the locking member, the locking member mating groove is a long groove extending forward and backward, the locking member can move forward and backward in the long groove, and is used to cooperate with the inner wall of the groove at the end of the long groove, the locking member and the locking member mating groove have an active gap in the circumferential direction of the connecting head, the circumferential active gap between the locking member and the connecting head is larger than the circumferential active gap between the slot and the connecting head, so that the circumferential anti-rotation cooperation between the slot and the connecting head is used to transmit torque; or, a circumferential annular groove is provided on the connecting head to cooperate with the locking member, so as to transmit torque through the circumferential anti-rotation cooperation between the slot and the connecting head.

9. The screw conveyor according to claim 8, characterized in that: The slot is a polygonal slot, and the outer peripheral surface of the connector is a polygonal cylinder that cooperates with the inner wall surface of the slot to transmit torque.

10. The screw conveyor according to claim 9, characterized in that: The slot is a hexagonal slot, and the outer peripheral surface of the connector is a hexagonal prism surface.

11. The screw conveyor according to claim 9, characterized in that: At least two anti-slipping members are provided, and the anti-slipping members are fixed on the groove side walls of the polygonal groove.

12. The screw conveyor according to any one of claims 8 to 11, characterized in that: The anti-slipping piece is an anti-slipping pin which is threadedly fixed on the groove wall of the slot.

13. The screw conveyor according to any one of claims 8 to 11, characterized in that: The first cylinder section is connected to the second cylinder section via a spherical bearing.

14. The screw conveyor according to any one of claims 8 to 11, characterized in that: The screw conveyor comprises an adjusting cylinder, which comprises a cylinder body and a piston rod. One of the cylinder body and the piston rod is movably arranged on the first cylinder section, and the other is movably arranged on the second cylinder section.

15. The screw conveyor according to claim 14, characterized in that The first cylinder section is connected to the second cylinder section via a joint bearing, the outer ring of the joint bearing is fixed to the first cylinder section, and the piston rod of the adjusting cylinder is hinged on the outer ring of the joint bearing.

16. A tunnel boring machine comprising a cutter head and a soil bin at the rear of the cutter head, and a screw conveyor extending into the soil bin for conveying soil to the outside, characterized in that: The screw conveyor is the screw conveyor described in any one of claims 1-15.

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