Tunnel walking device of variable-section lining trolley and construction method

Abstract

The invention relates to the technical field of section lining trolleys, in particular to a tunnel walking device of a section-variable lining trolley and a construction method.The tunnel walking device comprises an arc top formwork, an advancing power assembly is installed at the bottom of the arc top formwork, and advancing assemblies are installed on the two sides of the advancing power assembly; an advancing positioning rail assembly is arranged on the outer side of the advancing assembly, the advancing power assembly comprises a positioning supporting plate, one side of the positioning supporting plate is fixedly connected with a driving motor, an output shaft of the driving motor is fixedly connected with a first transmission gear, and a transmission shaft is installed on the side face of the positioning supporting plate; the track is laid according to the walking path of the variable-section lining trolley, firstly, the positioning track frames are sequentially arranged on the walking path, then the positioning pins are inserted into the positioning holes in the tops of the positioning plates, then the positioning pins are inserted into the bottoms of the positioning plates till the bottoms of the pulling columns make contact with the tops of the positioning plates, and then track positioning can be completed.

Description

Technical Field

[0001] The invention relates to the technical field of cross-section lining trolleys, and more specifically to a tunnel traveling device and a construction method of a variable cross-section lining trolley. Background Art

[0002] The variable section lining trolley is a tunnel construction equipment with variable section adjustment function. It is usually composed of a steel frame, an adjustable crossbeam, a travel system, an arc template, a top support and a hydraulic jack. Its characteristic is that it can be adjusted according to the changes in the tunnel section to meet the construction needs of tunnels with different section sizes.

[0003] The main components of the lining trolley are the steel frame: as the main supporting structure of the trolley, it usually adopts a double-door frame design with sufficient strength and stability. The running system: set under the steel frame, enabling the trolley to move in the tunnel, usually composed of wheels and tracks. The curved template: matches the shape of the tunnel section, used for lining construction, usually made of steel plates.

[0004] The existing variable section lining trolley travels in the tunnel mainly by rails and wheel sets. When traveling, the rails are moved by equipment and pushed forward in sequence, so that there are always rails at the moving position of the variable section lining trolley, which is convenient for users to operate; however, the existing traveling device does not have the ability to climb slopes during use. During the climbing process, the wheel sets and the rails will idle, making it impossible for the variable section lining trolley to move normally, and even slide to the bottom of the slope, so it is not easy to ensure the safe use of the equipment. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a tunnel traveling device and a construction method of a variable-section lining trolley to solve the problems existing in the above-mentioned background technology.

[0006] The present invention provides the following technical solution: a tunnel walking device of a variable-section lining trolley, comprising an arc top template, a traveling power assembly is installed at the bottom of the arc top template, traveling assemblies are installed on both sides of the traveling power assembly, a traveling positioning rail assembly is arranged on the outer side of the traveling assembly, the traveling power assembly comprises a positioning support plate, a driving motor is fixedly connected to one side of the positioning support plate, a first transmission gear is fixedly connected to the output shaft of the driving motor, a transmission shaft is installed on the side of the positioning support plate, a second transmission gear is fixedly connected to the outer side of the transmission shaft, circular positioning blocks are fixedly connected to both sides of the transmission shaft, and a driving arm assembly is fixedly connected to the outer side of the circular positioning block.

[0007] Furthermore, the arc top template includes an arc top body, both sides of the inner side of the arc top body are fixedly connected with a first support plate, the top of the first support plate is fixedly connected with a support beam, the middle part of the top of the support beam is fixedly connected with a second support plate, and both sides of the top of the support beam are fixedly connected with a third support plate.

[0008] Furthermore, the driving arm assembly includes a telescopic positioning sleeve, a telescopic groove is provided at the bottom of the telescopic positioning sleeve, a pressure spring is fixedly connected to the top of the telescopic groove, a limiting circular plate is fixedly connected to the bottom of the pressure spring, a telescopic column is fixedly connected to the bottom of the limiting circular plate, a rotating arc groove is provided on the front and back sides of the telescopic column, a rotating shaft is fixedly connected on both sides of the rotating arc groove, a rotating limit block is installed on the side of the rotating shaft away from the telescopic column, a torque spring is fixedly connected to the outer side of the rotating shaft, a traveling driving plate is fixedly connected to the bottom of the rotating limit block, and a rotating positioning notch is provided on both sides of the telescopic column.

[0009] Furthermore, the traveling component includes an L-shaped fixed plate, the top of the L-shaped fixed plate is fixedly connected to a positioning support inclined plate, a positioning bearing is installed on one side of the traveling component, a rotating drive shaft is installed on the inner side of the positioning bearing, a traveling wheel group is installed on one side of the rotating drive shaft, and a positioning drive groove is opened on the outer side of the traveling wheel group.

[0010] Furthermore, the traveling positioning rail assembly includes a positioning rail frame, a wheel group positioning groove is opened on the inner side of the positioning rail frame, positioning plates are fixedly connected to both sides of the positioning rail frame, a pulling column is arranged on the top of the positioning plate, and a positioning pin is fixedly connected to the bottom of the pulling column.

[0011] Furthermore, the width of the driving arm assembly is the same as the width of the top of the positioning rail frame, the diameter of the inner side of the telescopic slot is clearance matched with the diameter of the limiting circular plate, the diameter of the bottom opening of the telescopic slot is clearance matched with the diameter of the telescopic column, the center of the rotating arc slot is on the same line as the diameter of the rotating shaft, an arc is provided on the top of the rotating limit block, the center of the arc of the rotating limit block is on the same line as the center of the rotating shaft, the rotating limit block and the rotating shaft are positioned by a bearing, and the torque spring is fixedly connected to the telescopic column on the side close to the telescopic column.

[0012] Furthermore, the L-shaped fixing plate is fixedly connected to the positioning support plate on one side of the positioning support inclined plate, the diameter of the rotating drive shaft is three centimeters smaller than the width of the opening of the wheel group positioning groove close to the positioning support plate, the diameter of the traveling wheel group and the height of the inner side of the wheel group positioning groove have a clearance match, the width of the positioning drive groove and the width of the limit strip have a clearance match, the depth of the positioning drive groove and the thickness of the limit strip have a clearance match, the positioning support plate is connected to the output shaft of the driving motor and the transmission shaft through bearings, and friction surfaces are provided on the bottom of the traveling drive plate and the top of the positioning track frame.

[0013] A construction method for a tunnel traveling device of a variable-section lining trolley comprises the following steps:

[0014] Step 1: Track laying: The track is laid according to the travel path of the variable section lining trolley. First, the positioning track frames are arranged in sequence on the travel path. Then, the positioning pins are inserted into the positioning holes on the top of the positioning plate and then inserted to the bottom until the bottom of the pull column contacts the top of the positioning plate to complete the positioning of the track.

[0015] The second step is to drive the first gear to rotate through the output shaft of the driving motor, and then the teeth on the outer side of the first gear mesh with the teeth on the outer side of the second gear, so as to drive the second gear to rotate, and then drive the two circular positioning blocks to rotate synchronously, and then drive the driving arm assembly to rotate on the outer side of the circular positioning block. When the traveling driving plate contacts the top of the positioning track frame, the traveling driving plate and the rotating limit block will rotate along the rotating axis, so that the bottom of the traveling driving plate always contacts the top of the positioning track frame, and due to the interaction force between the traveling driving plate and the positioning track frame, the relative position of the traveling driving plate and the positioning track frame remains unchanged, so that the equipment moves forward, thereby achieving the purpose of the variable section lining trolley moving, and when traveling on an inclined surface, due to the friction between the traveling driving plate and the top of the positioning track frame, the variable section lining trolley can climb the slope;

[0016] During the continuous rotation of the driving arm assembly, the telescopic column and the limiting circular plate rise in the telescopic groove, so that the pressure spring is continuously compressed, thereby increasing the friction between the traveling driving plate and the positioning track frame, and the variable section lining trolley can be stationary on the slope, which is convenient for the variable section lining trolley to work on the slope;

[0017] The cooperation between the traveling wheel set and the positioning driving groove ensures that the height of the variable section lining trolley will not increase due to the rotation of the driving arm assembly during the operation, thereby ensuring the normal operation of the variable section lining trolley. The traveling wheel set can be effectively limited by the limiting strip and the wheel set positioning groove.

[0018] Step three, track movement. After the variable-section lining trolley passes through the travel positioning rail assembly, the positioning pin can be pulled out by pulling the column, so that the travel positioning rail assembly can be removed from the ground. Then, the travel positioning rail assembly is moved to the front of the travel by the lifting equipment, so that the travel positioning rail assembly is always present in the travel path of the variable-section lining trolley, and the travel direction of the variable-section lining trolley can be controlled by the travel positioning rail assembly.

[0019] Technical effects and advantages of the present invention:

[0020] 1. The present invention lays the track according to the travel path of the variable-section lining trolley. First, the positioning track frames are arranged in sequence on the travel path, and then the positioning pins are inserted into the positioning holes on the top of the positioning plate and then inserted to the bottom until the bottom of the pulling column contacts the top of the positioning plate to complete the positioning of the track.

[0021] 2. The present invention drives the first transmission gear to rotate through the output shaft of the driving motor, and then the teeth on the outer side of the first transmission gear mesh with the teeth on the outer side of the second transmission gear, thereby driving the second transmission gear to rotate, and then driving the two circular positioning blocks to rotate synchronously, and then driving the driving arm assembly to rotate on the outer side of the circular positioning block. When the traveling driving plate contacts the top of the positioning track frame, the traveling driving plate and the rotating limit block will rotate along the rotating axis, and then the bottom of the traveling driving plate will always contact the top of the positioning track frame, and due to the interaction force between the traveling driving plate and the positioning track frame, the relative position of the traveling driving plate and the positioning track frame remains unchanged, so that the equipment moves forward, thereby achieving the purpose of the variable cross-section lining trolley traveling, and when traveling on an inclined surface, due to the friction between the traveling driving plate and the top of the positioning track frame, the variable cross-section lining trolley can climb the slope.

[0022] 3. In the process of continuous rotation of the driving arm assembly of the present invention, the telescopic column and the limiting circular plate rise in the telescopic groove, so that the pressure spring is continuously compressed, thereby increasing the friction between the traveling driving plate and the positioning track frame, and the variable-section lining trolley can be stationary on the slope, which facilitates the variable-section lining trolley to work on the slope.

[0023] 4. The present invention ensures that the height of the variable cross-section lining trolley will not increase due to the rotation of the driving arm assembly during the operation of the variable cross-section lining trolley through the mutual cooperation between the traveling wheel group and the positioning driving groove, thereby ensuring the normal operation of the variable cross-section lining trolley, and the traveling wheel group can be effectively limited by the limiting strip and the wheel group positioning groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the arc top template structure of the present invention.

[0026] Figure 3 It is a schematic diagram of the structure of the traveling power assembly of the present invention.

[0027] Figure 4 It is a schematic diagram of the structure of the driving arm assembly of the present invention.

[0028] Figure 5 This is a structural diagram of embodiment 2 of the present invention.

[0029] Figure 6 This is a structural diagram of embodiment 3 of the present invention.

[0030] Figure 7 This is a structural diagram of embodiment 3 of the present invention.

[0031] The accompanying drawings are marked as follows: 1. arc top template; 101. arc top body; 102. first support plate; 103. support beam; 104. second support plate; 105. third support plate; 2. travel power assembly; 201. positioning support plate; 202. drive motor; 203. first transmission gear; 204. second transmission gear; 205. circular positioning block; 206. drive arm assembly; 2061. telescopic positioning sleeve; 2062. telescopic slot; 2063. pressure spring; 2064. limiting circular plate; 2065. telescopic column; 2066. rotating arc slot; 2067, rotation limit block; 2068, travel drive plate; 2069, rotation positioning notch; 20610, rotation axis; 20611, torque spring; 207, transmission shaft; 3, travel assembly; 301, L-shaped fixing plate; 302, positioning support inclined plate; 303, positioning bearing; 304, rotation drive shaft; 305, travel wheel set; 306, positioning drive groove; 4, travel positioning rail assembly; 401, positioning rail frame; 402, wheel set positioning groove; 403, limit strip; 404, positioning plate; 405, pulling column; 406, positioning pin. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The tunnel walking device and construction method of the variable section lining trolley involved in the present invention are not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0033] Reference Figures 1 to 7The present invention provides a tunnel walking device of a variable-section lining trolley, comprising an arc top template 1, a traveling power assembly 2 is installed at the bottom of the arc top template 1, traveling assemblies 3 are installed on both sides of the traveling power assembly 2, and a traveling positioning rail assembly 4 is arranged on the outer side of the traveling assembly 3. The traveling power assembly 2 comprises a positioning support plate 201, a driving motor 202 is fixedly connected to one side of the positioning support plate 201, and a first transmission gear 203 is fixedly connected to the output shaft of the driving motor 202, a transmission shaft 207 is installed on the side of the positioning support plate 201, and a second transmission gear 204 is fixedly connected to the outer side of the transmission shaft 207, circular positioning blocks 205 are fixedly connected to both sides of the transmission shaft 207, and a driving arm assembly 206 is fixedly connected to the outer side of the circular positioning block 205.

[0034] In a preferred embodiment, the arc top template 1 includes an arc top body 101, and the first support plates 102 are fixedly connected to both sides of the inner side of the arc top body 101, the top of the first support plate 102 is fixedly connected to a support beam 103, the middle of the top of the support beam 103 is fixedly connected to a second support plate 104, and both sides of the top of the support beam 103 are fixedly connected to a third support plate 105.

[0035] In a preferred embodiment, the driving arm assembly 206 includes a telescopic positioning sleeve 2061, a telescopic slot 2062 is provided at the bottom of the telescopic positioning sleeve 2061, a pressure spring 2063 is fixedly connected to the top of the telescopic slot 2062, a limiting circular plate 2064 is fixedly connected to the bottom of the pressure spring 2063, a telescopic column 2065 is fixedly connected to the bottom of the limiting circular plate 2064, and a rotating arc slot 2066 is provided on the front and back sides of the telescopic column 2065. Both sides of the telescopic column 2065 are fixedly connected with a rotating shaft 20610, a rotating limit block 2067 is installed on the side of the rotating shaft 20610 away from the telescopic column 2065, a torque spring 20611 is fixedly connected to the outer side of the rotating shaft 20610, and a travel driving plate 2068 is fixedly connected to the bottom of the rotating limit block 2067. Rotation positioning notches 2069 are provided on both sides of the telescopic column 2065; the first transmission gear 203 is driven to rotate through the output shaft through the driving motor 202, and then through the first The teeth on the outer side of the transmission gear 203 mesh with the teeth on the outer side of the second transmission gear 204, driving the second transmission gear 204 to rotate and then driving the two circular positioning blocks 205 to rotate synchronously, and then driving the driving arm assembly 206 to rotate on the outer side of the circular positioning block 205. When the travel driving plate 2068 contacts the top of the positioning track frame 401, the travel driving plate 2068 and the rotating limit block 2067 will rotate along the rotating axis 20610, so that the bottom of the travel driving plate 2068 always contacts the top of the positioning track frame 401, and due to the interaction force between the travel driving plate 2068 and the positioning track frame 401, the relative position of the travel driving plate 2068 and the positioning track frame 401 remains unchanged, so that the equipment moves forward, thereby achieving the purpose of the variable-section lining trolley traveling, and when traveling on an inclined surface, due to the friction between the travel driving plate 2068 and the top of the positioning track frame 401, the variable-section lining trolley can climb the slope.

[0036] In a preferred embodiment, the traveling component 3 includes an L-shaped fixed plate 301, the top of the L-shaped fixed plate 301 is fixedly connected with a positioning support inclined plate 302, a positioning bearing 303 is installed on one side of the traveling component 3, a rotating drive shaft 304 is installed on the inner side of the positioning bearing 303, a traveling wheel group 305 is installed on one side of the rotating drive shaft 304, and a positioning drive groove 306 is opened on the outer side of the traveling wheel group 305; through the mutual cooperation between the traveling wheel group 305 and the positioning drive groove 306, the height of the variable cross-section lining trolley will not increase due to the rotation of the driving arm assembly 206 during the operation, thereby ensuring the normal travel of the variable cross-section lining trolley, and the traveling wheel group 305 can be effectively limited by the limiting strip 403 and the wheel group positioning groove 402.

[0037] In a preferred embodiment, the traveling positioning rail assembly 4 includes a positioning rail frame 401, a wheel group positioning groove 402 is opened on the inner side of the positioning rail frame 401, positioning plates 404 are fixedly connected to both sides of the positioning rail frame 401, a pulling column 405 is arranged on the top of the positioning plate 404, and a positioning pin 406 is fixedly connected to the bottom of the pulling column 405; the track is laid according to the walking path of the variable section lining trolley, firstly, the positioning rail frame 401 is arranged in sequence on the travel route, and then the positioning pin 406 is inserted into the positioning hole at the top of the positioning plate 404, and then inserted to the bottom until the bottom of the pulling column 405 contacts the top of the positioning plate 404 to complete the positioning of the track.

[0038] In a preferred embodiment, the width of the driving arm assembly 206 is the same as the width of the top of the positioning track frame 401, the inner diameter of the telescopic slot 2062 is clearance matched with the diameter of the limiting circular plate 2064, the diameter of the bottom opening of the telescopic slot 2062 is clearance matched with the diameter of the telescopic column 2065, the center of the rotating arc slot 2066 is in the same straight line with the diameter of the rotating shaft 20610, the top of the rotating limit block 2067 is provided with an arc, the center of the arc of the rotating limit block 2067 is in the same straight line with the center of the rotating shaft 20610, and the rotating limit The positioning block 2067 and the rotating shaft 20610 are positioned by bearings, and the torque spring 20611 is fixedly connected to the telescopic column 2065 on one side close to the telescopic column 2065; during the continuous rotation of the driving arm assembly 206, the telescopic column 2065 and the limiting circular plate 2064 rise in the telescopic groove 2062, so that the pressure spring 2063 is continuously compressed, thereby increasing the friction between the traveling driving plate 2068 and the positioning track frame 401, and the variable section lining trolley can be stationary on the slope, which is convenient for the variable section lining trolley to work on the slope.

[0039] In a preferred embodiment, the L-shaped fixing plate 301 and one side of the positioning support inclined plate 302 are fixedly connected to the positioning support plate 201, the diameter of the rotating drive shaft 304 is three centimeters smaller than the width of the opening of the wheel group positioning groove 402 close to the positioning support plate 201, the diameter of the traveling wheel group 305 and the height of the inner side of the wheel group positioning groove 402 have a gap match, the width of the positioning drive groove 306 and the width of the limit strip 403 have a gap match, the depth of the positioning drive groove 306 and the thickness of the limit strip 403 have a gap match, the positioning support plate 201 is connected to the output shaft of the drive motor 202 and the transmission shaft 207 through bearings, and the bottom of the traveling drive plate 2068 and the top of the positioning track frame 401 are both provided with friction surfaces.

[0040] A construction method for a tunnel traveling device of a variable-section lining trolley comprises the following steps:

[0041] Step 1: track laying. The track is laid according to the travel path of the variable section lining trolley. First, the positioning track frames 401 are arranged in sequence on the travel path. Then, the positioning pins 406 are inserted into the positioning holes at the top of the positioning plate 404 and then inserted to the bottom until the bottom of the pulling column 405 contacts the top of the positioning plate 404 to complete the positioning of the track.

[0042] Step 2: The variable cross-section lining trolley moves forward. The driving motor 202 drives the first transmission gear 203 to rotate through the output shaft. Then, the teeth on the outer side of the first transmission gear 203 mesh with the teeth on the outer side of the second transmission gear 204, driving the second transmission gear 204 to rotate, and then driving the two circular positioning blocks 205 to rotate synchronously, and then driving the driving arm assembly 206 to rotate outside the circular positioning block 205. When the travel driving plate 2068 contacts the top of the positioning track frame 401, the travel driving plate 2068 and the rotation limit block 2067 will rotate along the rotation. The rotating shaft 20610 rotates, and then the bottom of the traveling driving plate 2068 always contacts the top of the positioning track frame 401, and due to the interaction force between the traveling driving plate 2068 and the positioning track frame 401, the relative position of the traveling driving plate 2068 and the positioning track frame 401 remains unchanged, so that the device moves forward, thereby achieving the purpose of the variable-section lining trolley traveling, and when traveling on an inclined surface, due to the friction between the traveling driving plate 2068 and the top of the positioning track frame 401, the variable-section lining trolley can climb the slope;

[0043] During the continuous rotation of the driving arm assembly 206, the telescopic column 2065 and the limiting circular plate 2064 rise in the telescopic groove 2062, so that the pressure spring 2063 is continuously compressed, thereby increasing the friction between the traveling driving plate 2068 and the positioning track frame 401, and the variable-section lining trolley can be stationary on the slope, which is convenient for the variable-section lining trolley to work on the slope;

[0044] The cooperation between the traveling wheel set 305 and the positioning driving groove 306 ensures that the height of the variable cross-section lining trolley will not increase due to the rotation of the driving arm assembly 206 during the operation, thereby ensuring the normal operation of the variable cross-section lining trolley. The traveling wheel set 305 can be effectively limited by the limiting strip 403 and the wheel set positioning groove 402.

[0045] Step three, track movement. After the variable-section lining trolley passes through the travel positioning rail assembly 4, the positioning pin 406 can be pulled out by pulling the column 405, so that the travel positioning rail assembly 4 can be removed from the ground. Then, the travel positioning rail assembly 4 is moved to the front of the travel by a lifting device, so that the travel positioning rail assembly 4 is always present in the travel path of the variable-section lining trolley, and the travel direction of the variable-section lining trolley can be controlled by the travel positioning rail assembly 4.

[0046] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0047] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0048] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tunnel traveling device of a variable cross-section lining trolley, comprising an arc top template (1), characterized in that: A traveling power assembly (2) is installed at the bottom of the arc top template (1), and traveling assemblies (3) are installed on both sides of the traveling power assembly (2). A traveling positioning rail assembly (4) is arranged on the outer side of the traveling assembly (3). The traveling power assembly (2) comprises a positioning support plate (201), and a driving motor (202) is fixedly connected to one side of the positioning support plate (201), and the output shaft of the driving motor (202) is fixedly connected to a first transmission gear (203). A transmission shaft (207) is installed on the side of the positioning support plate (201), and a second transmission gear (204) is fixedly connected to the outer side of the transmission shaft (207). Circular positioning blocks (205) are fixedly connected to both sides of the transmission shaft (207), and a driving arm assembly (206) is fixedly connected to the outer side of the circular positioning block (205).

2. The tunnel traveling device of a variable cross-section lining trolley according to claim 1, characterized in that: The arc top template (1) comprises an arc top body (101), both sides of the inner side of the arc top body (101) are fixedly connected to a first support plate (102), the top of the first support plate (102) is fixedly connected to a support beam (103), the middle of the top of the support beam (103) is fixedly connected to a second support plate (104), and both sides of the top of the support beam (103) are fixedly connected to a third support plate (105).

3. The tunnel traveling device of a variable cross-section lining trolley according to claim 1, characterized in that: The driving arm assembly (206) comprises a telescopic positioning sleeve (2061), a telescopic slot (2062) is provided at the bottom of the telescopic positioning sleeve (2061), a pressure spring (2063) is fixedly connected to the top of the telescopic slot (2062), a limiting circular plate (2064) is fixedly connected to the bottom of the pressure spring (2063), a telescopic column (2065) is fixedly connected to the bottom of the limiting circular plate (2064), and a rotating arc slot (2065) is provided on both the front and back sides of the telescopic column (2065). 066), both sides of the rotating arc groove (2066) are fixedly connected with a rotating shaft (20610), a rotating limit block (2067) is installed on the side of the rotating shaft (20610) away from the telescopic column (2065), the outer side of the rotating shaft (20610) is fixedly connected with a torque spring (20611), the bottom of the rotating limit block (2067) is fixedly connected with a travel driving plate (2068), and both sides of the telescopic column (2065) are provided with a rotating positioning notch (2069).

4. The tunnel traveling device of a variable cross-section lining trolley according to claim 1, characterized in that: The traveling component (3) comprises an L-shaped fixed plate (301), the top of the L-shaped fixed plate (301) is fixedly connected to a positioning support inclined plate (302), a positioning bearing (303) is installed on one side of the traveling component (3), a rotating drive shaft (304) is installed on the inner side of the positioning bearing (303), a traveling wheel group (305) is installed on one side of the rotating drive shaft (304), and a positioning drive groove (306) is provided on the outer side of the traveling wheel group (305).

5. The tunnel traveling device of a variable cross-section lining trolley according to claim 1, characterized in that: The traveling positioning rail assembly (4) comprises a positioning rail frame (401), a wheel group positioning groove (402) is provided on the inner side of the positioning rail frame (401), positioning plates (404) are fixedly connected to both sides of the positioning rail frame (401), a pulling column (405) is provided on the top of the positioning plate (404), and a positioning pin (406) is fixedly connected to the bottom of the pulling column (405).

6. The tunnel traveling device of a variable cross-section lining trolley according to claim 1, characterized in that: The width of the driving arm assembly (206) is the same as the width of the top of the positioning track frame (401); the inner diameter of the telescopic slot (2062) and the diameter of the limiting circular plate (2064) are clearance matched; the diameter of the bottom opening of the telescopic slot (2062) and the diameter of the telescopic column (2065) are clearance matched; the center of the rotating arc slot (2066) and the diameter of the rotating shaft (20610) are on the same straight line; the top of the rotating limit block (2067) is provided with an arc; the center of the arc of the rotating limit block (2067) and the center of the rotating shaft (20610) are on the same straight line; the rotating limit block (2067) and the rotating shaft (20610) are positioned by a bearing; and the torque spring (20611) is fixedly connected to the telescopic column (2065) on the side close to the telescopic column (2065).

7. The tunnel traveling device of a variable cross-section lining trolley according to claim 1, characterized in that: The L-shaped fixing plate (301) and one side of the positioning support inclined plate (302) are fixedly connected to the positioning support plate (201); the diameter of the rotating drive shaft (304) is three centimeters smaller than the width of the opening of the wheel group positioning groove (402) close to the positioning support plate (201); the diameter of the traveling wheel group (305) and the height of the inner side of the wheel group positioning groove (402) are gap matched; the width of the positioning drive groove (306) and the width of the limit strip (403) are gap matched; the depth of the positioning drive groove (306) and the thickness of the limit strip (403) are gap matched; the positioning support plate (201) is connected to the output shaft of the drive motor (202) and the transmission shaft (207) through bearings; the bottom of the traveling drive plate (2068) and the top of the positioning track frame (401) are both provided with friction surfaces.

8. A construction method for a tunnel traveling device of a variable cross-section lining trolley according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Track laying: The track is laid according to the travel path of the variable section lining trolley. First, the positioning track frame (401) is arranged in sequence on the travel path. Then, the positioning pin (406) is inserted into the positioning hole at the top of the positioning plate (404), and then inserted to the bottom until the bottom of the pulling column (405) contacts the top of the positioning plate (404). The positioning of the track is completed. S2. The variable cross-section lining trolley moves forward. The driving motor (202) drives the first transmission gear (203) to rotate through the output shaft. Then, the teeth on the outer side of the first transmission gear (203) mesh with the teeth on the outer side of the second transmission gear (204), driving the second transmission gear (204) to rotate, and then driving the two circular positioning blocks (205) to rotate synchronously, and then driving the driving arm assembly (206) to rotate outside the circular positioning block (205). When the traveling driving plate (2068) contacts the top of the positioning track frame (401), the traveling driving plate (2068) and the rotation limit block (2067) will Rotating along the rotating shaft (20610), the bottom of the traveling driving plate (2068) is always in contact with the top of the positioning track frame (401), and due to the interaction force between the traveling driving plate (2068) and the positioning track frame (401), the relative position of the traveling driving plate (2068) and the positioning track frame (401) remains unchanged, so that the device moves forward, thereby achieving the purpose of the variable cross-section lining trolley traveling, and when traveling on an inclined surface, due to the friction between the traveling driving plate (2068) and the top of the positioning track frame (401), the variable cross-section lining trolley can climb the slope; During the continuous rotation of the driving arm assembly (206), the telescopic column (2065) and the limiting circular plate (2064) rise in the telescopic groove (2062), causing the pressure spring (2063) to be continuously compressed, thereby increasing the friction between the traveling driving plate (2068) and the positioning track frame (401), and the variable-section lining trolley can be stationary on the slope, making it easier for the variable-section lining trolley to work on the slope; The mutual cooperation between the traveling wheel set (305) and the positioning driving groove (306) ensures that the height of the variable cross-section lining trolley will not increase due to the rotation of the driving arm assembly (206) during the operation of the variable cross-section lining trolley, thereby ensuring the normal operation of the variable cross-section lining trolley. Furthermore, the traveling wheel set (305) can be effectively limited by the limiting strip (403) and the wheel set positioning groove (402); S3, track movement. After the variable-section lining trolley passes the travel positioning rail assembly (4), the positioning pin (406) can be pulled out by pulling the column (405), so that the travel positioning rail assembly (4) can be removed from the ground. Then, the travel positioning rail assembly (4) can be moved to the front of the travel by a lifting device, so that the travel positioning rail assembly (4) is always present in the travel path of the variable-section lining trolley, and the travel direction of the variable-section lining trolley can be controlled by the travel positioning rail assembly (4).

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