Resistance increasing device for heading machine

Abstract

The invention relates to the technical field of heading machines, and discloses a resistance increasing device for a heading machine, the resistance increasing device comprises a pressure-bearing shell, a closing plate is movably mounted at a position, close to the top, of the right side of the pressure-bearing shell, a sliding hole is formed in a position, close to the right side, of the top of the closing plate, and the sliding hole is movably sleeved with a sliding rod; the top of the sealing plate makes contact with the top face of an inner cavity of the pressure-bearing shell, and the telescopic bases are distributed in a rectangular array mode. In the process that the sealing plate is inserted into the pressure-bearing shell, part of the communication position of the telescopic base and the pressure-bearing shell is sealed, the acting force between the pressure-bearing teeth and the inner wall of the tunnel is improved after the pressure-bearing teeth extend out, the pressure-bearing teeth can have enough pressure to be inserted into the inner wall of the tunnel when the ground is hard, the effect of increasing resistance in the propelling process of the rotating cutter head is achieved, and the service life of the rotating cutter head is prolonged. And meanwhile, the problem that the pressure cannot be normally shared due to the fact that the pressure-bearing teeth cannot be normally inserted into the inner wall of the tunnel due to too small pressure is also avoided, and the stability of the device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of tunnel boring machines, and in particular to a resistance increasing device for tunnel boring machines. Background Art

[0002] A tunnel boring machine is a large-scale machine that can carry out underground tunnel construction. It is generally composed of a tunneling cutterhead, power equipment, hydraulic equipment, material guiding equipment and segment installation equipment. During use, the tunneling cutterhead excavates the front end of the tunnel, the hydraulic equipment provides hydraulic power to the power equipment, and drives the tunneling cutterhead to advance through the telescopic machine. The material guiding equipment transports the gravel and soil formed during the advancement of the tunneling cutterhead to the outside of the tunnel. At the same time, the segment installation equipment installs the concrete segments on the inner wall of the tunnel. During the advancement process, the output end of the hydraulic telescopic machine in the power equipment directly contacts the concrete segments, which has a compaction effect.

[0003] However, during the advancement of the tunnel boring machine, the hydraulic telescopic machine will generate a maximum thrust of 10,000 tons, and this force will directly act on the surface of the concrete ring segment, subjecting it to enormous pressure. Under this action, the concrete ring segment is prone to cracking and breaking, thereby affecting its support effect on the inner wall of the tunnel and affecting the construction safety of the tunnel. In this regard, this application document proposes a resistance-enhancing device for a tunnel boring machine, aiming to solve the above-mentioned problems. Summary of the invention

[0004] The present application proposes a resistance increasing device for a tunnel boring machine, which has the advantages of protecting the concrete ring segments and increasing the resistance required during the tunnel boring process, and is used to solve the problem that the huge pressure during the advancement of the tunnel boring machine directly acts on the concrete ring segments, causing them to crack and break.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a resistance-increasing device for a tunnel boring machine, comprising an outer shell, a sleeve hole is opened on the front side of the outer shell near the center, a rotating cutter disc is interactively sleeved inside the sleeve hole by a bearing connection, a stone guard is fixedly installed on the back side of the sleeve hole near the outside, an annular mounting plate is fixedly installed on the inner wall of the stone guard near the back, a power unit is fixedly sleeved on one side of the annular mounting plate, the power units are grouped in two and distributed in a circular array, and the end of the power unit is fixedly connected to the back side of the sleeve hole.

[0006] Furthermore, the power device includes a hydraulic press and a telescopic device, and the hydraulic press can drive the telescopic device to telescope.

[0007] Specifically, a first connecting plate and a second connecting plate are fixedly installed near the middle and the end of the outer surface of the hydraulic press, a pressure device is movably installed at the front end of the telescopic device, and a pressure-bearing device is movably installed at the inner cavity of the pressure device near the front.

[0008] Specifically, the first connection plate and the second connection plate are fixedly connected to the annular mounting plate and the outer shell respectively.

[0009] Furthermore, the telescopic device includes a telescopic rod, the front end of which is movably mounted on the pressure device, and a connecting arm is fixedly mounted on the outer surface of the telescopic rod near the front end. When the hydraulic press drives the telescopic device to extend and retract, it will drive the connecting arm to move synchronously.

[0010] Specifically, a travel rod is fixedly installed on the front side of the connecting arm near the outer side, a travel seat is movably provided on the outer surface of the travel rod near one end, a travel spring is clamped on the back side of the travel seat at a position outside the travel rod, one end of the travel spring is fixedly connected to the connecting arm, and when the movement of the travel seat is obstructed, the travel seat will slide along the extension direction of the travel rod.

[0011] Specifically, a slide bar is fixedly mounted on the top of the travel spring, and a stop plate is fixedly mounted on one end of the slide bar, and the stop plate serves as a stop.

[0012] Specifically, the sliding rod and the pressure-bearing device are movably installed.

[0013] Furthermore, the pressure device includes a pressure shell, the front side of the pressure shell is set to be an opening, and a circular hole is set on the right side of the outer surface of the pressure shell. The number of the circular holes is two and they are distributed on the left and right sides. A stroke tube is fixedly installed on the right side of the inner cavity of the pressure shell and at a position corresponding to the circular hole. During the extension and retraction of the telescopic device, the space inside the stroke tube will be squeezed, thereby increasing the pressure.

[0014] Specifically, an annular protrusion is provided near the middle of the inner wall of the stroke tube, and pressure-conducting holes are provided on both sides of the inner wall of the annular protrusion. The pressure inside the stroke tube increases and is transmitted to the outer cavity through the pressure-conducting holes.

[0015] Specifically, the pressure-conducting hole extends to the outer surface of the stroke tube, and an air leakage hole is opened on the left side of the outer surface of the pressure shell. The air leakage hole is connected to the inner cavity of the stroke tube. A pressure-stabilizing spring is clamped on the left side of the inner wall of the pressure shell and located outside the air leakage hole. A pressure-receiving piston is fixedly installed on one end of the pressure-stabilizing spring. The pressure-receiving piston will slide inside the stroke tube under the action of pressure, thereby preventing the liquid pressure inside the pressure shell from rising too quickly.

[0016] Specifically, a gas relief groove is provided on the left side of the outer surface of the pressure shell to facilitate the discharge of gas inside the stroke tube when the pressurized piston is displaced.

[0017] Specifically, one side of the pressure piston is in contact with the annular protrusion in the initial state, the contact surface between the pressure piston and the inner wall of the stroke tube is sealed, and hydraulic oil is injected into the pressure housing and the stroke tube.

[0018] Specifically, the air relief groove is communicated with the air relief hole.

[0019] Furthermore, the pressure-bearing device includes a pressure-bearing shell, the back of which is set to be open, and the pressure-bearing shell is movably installed inside the pressure shell. When the internal pressure of the pressure shell increases, the pressure-bearing shell extends from the inside of the pressure shell.

[0020] Specifically, tail plates are fixedly installed on the back side of the pressure shell near both ends, and a limiting rod is fixedly installed on the back side of the tail plate. The limiting rod passes through the back side of the pressure shell, and a return spring is clamped at the end of the limiting rod, which plays a return role.

[0021] Specifically, one end of the return spring is connected to the back side of the pressure shell, a telescopic seat is provided on the front side of the pressure shell, the telescopic seat is connected to the inner cavity of the pressure shell, and a pressure-bearing tooth is movably installed inside the telescopic seat. When the pressure-bearing tooth is subjected to pressure, it will extend from the inside of the telescopic seat and contact with the inner wall of the tunnel to share the pressure.

[0022] Specifically, a closing plate is movably installed at a position near the top of the right side of the pressure-bearing shell, and a sliding hole is opened at a position near the right side of the top of the closing plate, and the sliding hole is movably sleeved with a sliding rod.

[0023] Specifically, the top of the closing plate contacts the top surface of the inner cavity of the pressure-bearing shell.

[0024] Specifically, the telescopic seats are distributed in a rectangular array.

[0025] This application has the following beneficial effects.

[0026] A pressure device is used to increase the contact area between the end of the telescopic device and the concrete ring segment, so that the pressure on one side of the concrete ring segment is reduced during the movement of the tunnel boring machine, avoiding cracking and breakage. During the extension of the telescopic device, the pressure inside the pressure shell increases, and the pressure-bearing teeth extend from the inside of the telescopic seat and insert into the inner wall of the tunnel, which has the effect of sharing the pressure and better protects the concrete ring segment. The harder the geological environment, the greater the pressure on the pressure-bearing teeth, and the pressure of the head on the inner wall of the tunnel increases, causing it to generate greater force and insert into the inner wall of the tunnel, thereby increasing the resistance required during the advancement of the rotating cutter head. At the same time, it also ensures that it can share the pressure on the concrete ring segment, further protecting the concrete ring segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0028] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a cross-sectional view of the structure of the present invention; Figure 3 This is a diagram of the structural power device of the present invention; Figure 4 It is a cross-sectional view of the structural power device of the present invention; Figure 5 This is a diagram of the structural telescopic device of the present invention; Figure 6 This is a diagram of the structural pressure device of the present invention; Figure 7 It is a cross-sectional view of the structural pressure device of the present invention; Figure 8 This is a diagram of the pressure bearing device of the structure of the present invention; Fig. 9 It is a cross-sectional view of the pressure-bearing device of the structure of the present invention.

[0029] In the figure; 1, housing; 2, sleeve hole; 3, rotating cutter head; 4, stone guard; 5, annular mounting plate; 6, power device; 61, hydraulic press; 62, telescopic device; 621, telescopic rod; 622, connecting arm; 623, travel rod; 624, travel seat; 625, travel spring; 626, slide rod; 627, stop plate; 63, first connecting plate; 64, second connecting plate; 65, pressure device; 651, Pressure shell; 652, round hole; 653, stroke tube; 654, annular protrusion; 655, pressure-conducting hole; 656, air relief hole; 657, pressure-stabilizing spring; 658, pressure-bearing piston; 659, air relief groove; 66, pressure-bearing device; 661, pressure-bearing shell; 662, tail plate; 663, limit rod; 664, return spring; 665, telescopic seat; 666, pressure-bearing tooth; 667, closing plate; 668, sliding hole. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] A resistance increasing device for a tunnel boring machine, see Figure 1-Figure 2 , including a shell 1, a sleeve hole 2 is opened on the front side of the shell 1 near the center, a rotating cutter head 3 is interactively sleeved inside the sleeve hole 2 by means of a bearing connection, a stone retaining cover 4 is fixedly installed on the back side of the sleeve hole 2 near the outer side, an annular mounting plate 5 is fixedly installed on the inner wall of the stone retaining cover 4 near the back side, a power device 6 is fixedly sleeved on one side of the annular mounting plate 5, two power devices 6 are grouped together and distributed in a circular array, and the end of the power device 6 is fixedly connected to the back side of the sleeve hole 2.

[0032] See also Figure 3-Figure 4 The power device 6 includes a hydraulic press 61 and a telescopic device 62, and the hydraulic press 61 can drive the telescopic device 62 to extend and retract.

[0033] See also Figure 3-Figure 4 A first connecting plate 63 and a second connecting plate 64 are fixedly installed on the outer surface of the hydraulic press 61 near the middle and the end respectively, a pressure device 65 is movably installed at the front end of the telescopic device 62, and a pressure-bearing device 66 is movably installed on the inner cavity of the pressure device 65 near the front.

[0034] See also Figure 1-Figure 4A pressure device 65 is movably installed at the front end of the telescopic device 62, so that when the hydraulic press 61 drives the telescopic device 62 to extend and drives the shell 1 and the rotating cutter head 3 to advance forward, the huge resistance will be transmitted to the concrete ring segment through the telescopic device 62. One end of the telescopic device 62 of the traditional equipment is directly in contact with the concrete ring segment installed on the inner wall of the tunnel, resulting in a huge pressure on its contact surface. Especially when excavating in some geologically hard environments, the pressure value output by the hydraulic press 61 is higher, which can easily cause the concrete ring segment to crack and break. The device involved in the present application document uses the pressure device 65 to contact the concrete ring segment, which greatly increases the contact area, thereby reducing the pressure on the contact surface, making the force more uniform, avoiding the concrete ring segment from cracking and breaking when the hydraulic press 61 outputs a large pressure, and improving the stability of the device during operation.

[0035] See also Figure 1-Figure 4 The first connecting plate 63 and the second connecting plate 64 are fixedly connected to the annular mounting plate 5 and the housing 1 respectively.

[0036] See also Figure 3-Figure 5 The telescopic device 62 includes a telescopic rod 621, the front end of the telescopic rod 621 is movably installed with the pressure device 65, and a connecting arm 622 is fixedly installed on the outer surface of the telescopic rod 621 near the front end. When the hydraulic press 61 drives the telescopic device 62 to extend and retract, it will drive the connecting arm 622 to move synchronously.

[0037] See also Figure 5 A travel rod 623 is fixedly installed on the front side of the connecting arm 622 near the outer side, and a travel seat 624 is movably sleeved on the outer surface of the travel rod 623 near one end. A travel spring 625 is clamped on the back side of the travel seat 624 at a position outside the travel rod 623. One end of the travel spring 625 is fixedly connected to the connecting arm 622. When the movement of the travel seat 624 is blocked, the travel seat 624 will slide along the extension direction of the travel rod 623.

[0038] See also Figure 5 A slide bar 626 is fixedly installed on the top of the travel spring 625, and a stop plate 627 is fixedly installed on one end of the slide bar 626, and the stop plate 627 plays the role of a stop.

[0039] See also Figure 3-Figure 5 The slide bar 626 and the pressure-bearing device 66 are movably installed.

[0040] See also Figure 4 and Figure 6-Figure 7The pressure device 65 includes a pressure shell 651, the front of the pressure shell 651 is set to be open, and a circular hole 652 is set on the right side of the outer surface of the pressure shell 651. The number of the circular holes 652 is two and they are distributed on the left and right sides. A stroke tube 653 is fixedly installed on the right side of the inner cavity of the pressure shell 651 and at a position corresponding to the circular hole 652. During the extension and retraction process of the telescopic device 62, the space inside the stroke tube 653 will be squeezed, so that the pressure increases.

[0041] See also Figure 6-Figure 7 An annular protrusion 654 is provided on the inner wall of the stroke tube 653 near the middle, and pressure-conducting holes 655 are provided on both sides of the inner wall of the annular protrusion 654 . The internal pressure of the stroke tube 653 increases and is transmitted to the outer cavity through the pressure-conducting holes 655 .

[0042] See also Figure 6-Figure 7 The pressure-conducting hole 655 extends to the outer surface of the stroke tube 653, and an air leakage hole 656 is provided on the left side of the outer surface of the pressure shell 651. The air leakage hole 656 is communicated with the inner cavity of the stroke tube 653. A pressure-stabilizing spring 657 is clamped on the left side of the inner wall of the pressure shell 651 at the position outside the air leakage hole 656. A pressure-receiving piston 658 is fixedly installed at one end of the pressure-stabilizing spring 657. The pressure-receiving piston 658 will slide inside the stroke tube 653 under the action of pressure, thereby preventing the liquid pressure inside the pressure shell 651 from rising too quickly.

[0043] See also Figure 6-Figure 7 A gas relief groove 659 is provided on the left side of the outer surface of the pressure shell 651 to facilitate the discharge of gas inside the stroke tube 653 when the pressure piston 658 is displaced.

[0044] See also Figure 6-Figure 7 In the initial state, one side of the pressure piston 658 contacts the annular protrusion 654, the contact surface between the pressure piston 658 and the inner wall of the stroke tube 653 is sealed, and hydraulic oil is injected into the pressure housing 651 and the stroke tube 653.

[0045] See also Figure 6-Figure 7 The air relief groove 659 is connected to the air relief hole 656.

[0046] See also Figure 7-Figure 9 The pressure-bearing device 66 includes a pressure-bearing shell 661, the back of which is set to be open. The pressure-bearing shell 661 is movably installed inside the pressure shell 651. When the internal pressure of the pressure shell 651 increases, the pressure-bearing shell 661 extends out from the inside of the pressure shell 651.

[0047] See also Figure 7-Figure 9A tail plate 662 is fixedly installed on the back side of the pressure shell 661 near both ends, and a limit rod 663 is fixedly installed on the back side of the tail plate 662. The limit rod 663 runs through the back side of the pressure shell 651. A return spring 664 is clamped at the end of the limit rod 663, and the return spring 664 plays a return role.

[0048] See also Figure 7-Figure 9 One end of the return spring 664 is connected to the back of the pressure shell 651, and a telescopic seat 665 is provided on the front of the pressure shell 661. The telescopic seat 665 is connected to the inner cavity of the pressure shell 661, and a pressure-bearing tooth 666 is movably installed inside the telescopic seat 665. When the pressure-bearing tooth 666 is subjected to pressure, it will extend from the inside of the telescopic seat 665 and contact with the inner wall of the tunnel to share the pressure.

[0049] When the hydraulic press 61 drives the telescopic device 62 to extend and drives the outer shell 1 and the rotating cutter disc 3 to advance, the front end of the telescopic rod 621 will extend into the interior of the stroke tube 653, thereby squeezing the internal cavity of the stroke tube 653, thereby increasing the liquid pressure inside the stroke tube 653, and this action is transmitted outward through the pressure-conducting hole 655. When the pressure-bearing teeth 666 inside the telescopic seat 665 are subjected to pressure, they extend outward, so that the pressure-bearing teeth 666 contact and insert with the inner wall of the tunnel, so that when the telescopic device 62 continues to extend, the pressure-bearing teeth 666 can share part of the pressure, thereby reducing the pressure on the concrete ring segment under high pressure conditions, reducing the probability of its damage, and improving the practicability of the device.

[0050] When the liquid pressure inside the pressure shell 651 increases, the pressure shell 661 extends out from the inside of the pressure shell 651 under this action, thereby reducing the distance between the outer surface of the pressure shell 661 and the inner wall of the tunnel, ensuring that the pressure-bearing teeth 666 can stably contact the inner wall of the tunnel after extending from the telescopic seat 665, avoiding the problem that the pressure-bearing teeth 666 cannot form a firm contact with the inner wall of the tunnel after extending due to the uneven inner wall of the tunnel formed by the rotating cutter head 3, resulting in the pressure-bearing teeth 666 being unable to share the pressure normally, thereby improving the reliability of the device.

[0051] When the texture of the excavation area is relatively hard, the pressure output by the hydraulic press 61 and the telescopic device 62 is relatively large, the distance that the telescopic device 62 extends into the stroke tube 653 increases, and at the same time, the distance between the connecting arm 622 and the pressure shell 651 decreases, and the depth of the closing plate 667 inserted into the pressure shell 661 increases. In the process of the closing plate 667 being inserted into the pressure shell 661, part of the connection between the telescopic seat 665 and the pressure shell 661 will be closed. At this time, when the telescopic device 62 continues to be inserted into the stroke tube 653, the pressure continues to rise. At this time, the number of telescopic seats 665 in the connected state is reduced, which increases the pressure on the pressure-bearing teeth 666 inside the telescopic seats 665 in the connected state, and increases the force between the pressure-bearing teeth 666 and the inner wall of the tunnel after they are extended. This ensures that when the soil is relatively hard, the pressure-bearing teeth 666 can be inserted into the inner wall of the tunnel with sufficient pressure, which increases the resistance during the advancement of the rotating cutter head 3. At the same time, it also avoids the problem that the pressure-bearing teeth 666 cannot be inserted into the inner wall of the tunnel normally due to too little pressure, resulting in the inability to share the pressure normally, thereby improving the stability of the device.

[0052] See also Figure 5 and Figure 8-Figure 9 A closing plate 667 is movably installed at a position near the top on the right side of the pressure-bearing shell 661, and a sliding hole 668 is opened at a position near the right side of the top of the closing plate 667, and the sliding hole 668 is movably sleeved with the sliding rod 626.

[0053] See also Figure 8-Figure 9 The top of the closing plate 667 contacts the top surface of the inner cavity of the pressure-bearing shell 661.

[0054] See also Figure 8-Figure 9 , the telescopic seats 665 are distributed in a rectangular array.

[0055] Since the sliding hole 668 is nested with the sliding rod 626, when the pressure-bearing shell 661 extends out from the inside of the pressure shell 651 under the action of pressure, the sliding hole 668 can slide along the extension direction of the sliding rod 626, thereby preventing the pressure-bearing shell 661 from being unable to extend normally due to the fixed position of the closing plate 667, thereby improving the stability of the device during operation.

[0056] The method of use of the present invention is as follows: During use, when the rotating cutterhead 3 is used for excavation, the hydraulic press 61 and the telescopic device 62 are required to provide forward power, and one side of the power device 6 will contact the concrete ring segment installed on the inner wall of the tunnel. When the hydraulic press 61 drives the telescopic device 62 to extend and drives the outer shell 1 and the rotating cutterhead 3 to excavate forward, the huge resistance will be transmitted to the concrete ring segment through the telescopic device 62. Since the pressure device 65 is used to contact the concrete ring segment, the contact area is greatly increased, thereby reducing the pressure on the contact surface, making the force more uniform, and avoiding the cracking and breaking of the concrete ring segment when the output pressure of the hydraulic press 61 is large. When the hydraulic press 61 drives the telescopic device 62 to extend and drives the housing 1 and the rotating cutter head 3 to move forward, the front end of the telescopic rod 621 will extend into the interior of the stroke tube 653, thereby squeezing the internal volume of the stroke tube 653, thereby increasing the liquid pressure inside the stroke tube 653, and this effect is transmitted outward through the pressure-conducting hole 655. When the pressure-bearing teeth 666 inside the telescopic seat 665 are subjected to pressure, they extend outward, so that the pressure-bearing teeth 666 contact and insert with the inner wall of the tunnel, so that when the telescopic device 62 continues to extend, the pressure-bearing teeth 666 can share part of the pressure, thereby reducing the pressure on the concrete ring segment under high pressure conditions and reducing the probability of its damage. When the liquid pressure inside the pressure shell 651 increases, the pressure shell 661 extends from the inside of the pressure shell 651 under this effect, thereby reducing the distance between the outer surface of the pressure shell 661 and the inner wall of the tunnel, ensuring that the pressure-bearing teeth 666 can stably contact the inner wall of the tunnel after extending from the inside of the telescopic seat 665. When the texture of the excavation area is relatively hard, the pressure output by the hydraulic press 61 and the telescopic device 62 is relatively large, and the distance that the telescopic device 62 extends into the stroke tube 653 is increased. At the same time, the distance between the connecting arm 622 and the pressure shell 651 is reduced, the depth of the closing plate 667 inserted into the pressure shell 661 is increased, and the closing plate 667 is inserted into the pressure shell 661. During the process of compressing the outer shell 661, part of the connection between the telescopic seat 665 and the pressure-bearing outer shell 661 will be closed. At this time, when the telescopic device 62 continues to be inserted into the stroke tube 653, the pressure continues to rise. At this time, the number of telescopic seats 665 in a connected state is reduced, which increases the pressure on the pressure-bearing teeth 666 inside the telescopic seats 665 in a connected state, and increases the force between the pressure-bearing teeth 666 and the inner wall of the tunnel after they are extended. This ensures that when the geology is relatively hard, the pressure-bearing teeth 666 can be inserted into the inner wall of the tunnel with sufficient pressure, thereby avoiding the problem that the pressure-bearing teeth 666 cannot be normally inserted into the inner wall of the tunnel due to too little pressure, resulting in the inability to share the pressure normally.

Claims

1. A resistance increasing device for a tunnel boring machine, characterized in that: The invention comprises a shell (1), a sleeve hole (2) is provided at a position near the center of the front side of the shell (1), a rotating cutter disc (3) is interactively sleeved inside the sleeve hole (2) by means of a bearing connection, a stone retaining cover (4) is fixedly installed at a position near the outer side of the back side of the sleeve hole (2), an annular mounting plate (5) is fixedly installed at a position near the back side of the inner wall of the stone retaining cover (4), a power device (6) is fixedly sleeved on one side of the annular mounting plate (5), two of the power devices (6) are grouped together and distributed in an annular array, and the end of the power device (6) is fixedly connected to the back side of the sleeve hole (2).

2. A resistance increasing device for a tunnel boring machine according to claim 1, characterized in that: The power device (6) comprises a hydraulic press (61) and a telescopic device (62); a first connection plate (63) and a second connection plate (64) are respectively fixedly mounted on the outer surface of the hydraulic press (61) near the middle and the end; a pressure device (65) is movably mounted on the front end of the telescopic device (62); and a pressure bearing device (66) is movably mounted on the inner cavity of the pressure device (65) near the front end; The first connection plate (63) and the second connection plate (64) are fixedly connected to the annular mounting plate (5) and the housing (1), respectively.

3. A resistance increasing device for a tunnel boring machine according to claim 2, characterized in that: The telescopic device (62) comprises a telescopic rod (621), the front end of the telescopic rod (621) is movably mounted on the pressure device (65), a connecting arm (622) is fixedly mounted on the outer surface of the telescopic rod (621) near the front end, a travel rod (623) is fixedly mounted on the front of the connecting arm (622) near the outer side, a travel seat (624) is movably sleeved on the outer surface of the travel rod (623) near one end, a travel spring (625) is clamped on the back of the travel seat (624) at a position outside the travel rod (623), one end of the travel spring (625) is fixedly connected to the connecting arm (622), a sliding rod (626) is fixedly mounted on the top of the travel spring (625), and a stop plate (627) is fixedly mounted on one end of the sliding rod (626); The sliding rod (626) and the pressure-bearing device (66) are movably mounted.

4. The resistance increasing device for a tunnel boring machine according to claim 3, characterized in that: The pressure device (65) comprises a pressure shell (651), the front of the pressure shell (651) is arranged to be open, a circular hole (652) is arranged on the right side of the outer surface of the pressure shell (651), the number of the circular holes (652) is two and they are distributed on the left and right sides, a stroke tube (653) is fixedly installed on the right side of the inner cavity of the pressure shell (651) and at a position corresponding to the circular hole (652), an annular protrusion (654) is arranged on the inner wall of the stroke tube (653) near the middle, and pressure guides are arranged on both sides of the inner wall of the annular protrusion (654). A hole (655) is formed on the left side of the outer surface of the stroke tube (653), the pressure-conducting hole (655) extends to the outer surface of the stroke tube (653), an air leakage hole (656) is formed on the left side of the outer surface of the pressure shell (651), the air leakage hole (656) is communicated with the inner cavity of the stroke tube (653), a pressure-stabilizing spring (657) is clamped on the left side of the inner wall of the pressure shell (651) at a position outside the air leakage hole (656), a pressure-receiving piston (658) is fixedly mounted on one end of the pressure-stabilizing spring (657), and an air leakage groove (659) is formed on the left side of the outer surface of the pressure shell (651); In the initial state, one side of the pressure-bearing piston (658) contacts the annular protrusion (654), the contact surface between the pressure-bearing piston (658) and the inner wall of the stroke tube (653) is sealed, and hydraulic oil is injected into the interior of the pressure housing (651) and the stroke tube (653); The air leakage groove (659) is in communication with the air leakage hole (656).

5. The resistance increasing device for a tunnel boring machine according to claim 4, characterized in that: The pressure-bearing device (66) comprises a pressure-bearing shell (661), the back of the pressure-bearing shell (661) is set to be open, the pressure-bearing shell (661) is movably installed inside the pressure shell (651), tail plates (662) are fixedly installed at positions near both ends of the back of the pressure-bearing shell (661), and a limiting rod (663) is fixedly installed on the back of the tail plate (662), the limiting rod (663) passes through the back of the pressure shell (651), and a return spring (664) is clamped at the end of the limiting rod (663), and the return spring (664) is fixedly installed on the back of the tail plate (662). One end of the pressure shell (64) is connected to the back side of the pressure shell (651), a telescopic seat (665) is arranged on the front side of the pressure shell (661), the telescopic seat (665) is connected to the inner cavity of the pressure shell (661), a pressure-bearing tooth (666) is movably installed inside the telescopic seat (665), a closing plate (667) is movably installed at a position near the top on the right side of the pressure shell (661), a sliding hole (668) is opened at a position near the right side of the top of the closing plate (667), and the sliding hole (668) is movably sleeved with the sliding rod (626); The top of the closing plate (667) is in contact with the top surface of the inner cavity of the pressure-bearing shell (661); The telescopic seats (665) are distributed in a rectangular array.

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