A lightweight turnout automatic switching device for shield construction

Abstract

The present application discloses a lightweight turnout automatic switching device for shield construction, belonging to the technical field of track turnouts. It includes a driving rod for driving the movement of the ends of two auxiliary guide rails and a linear driving source. The linear driving source is installed on the foundation and can be used to drive the driving rod to move. The automatic switching device further includes a processor. First turnout induction switches are installed on both sides of the two diverging running tracks. Two input ends of the processor are electrically connected to two output ends of the first turnout induction switches in one-to-one correspondence to receive the information of the rail vehicle entering the track fed back by the first turnout induction switches. The control end of the processor is electrically connected to the control end of the linear driving source. The processor controls the linear driving source to act in response to the information of the rail vehicle entering the track. In the present application, the processor controls the linear driving source to act to drive the two auxiliary guide rails to act, thereby achieving the purpose of facilitating the change of the running track of the rail vehicle.

Description

Technical Field

[0001] This application relates to the technical field of railway turnouts, and in particular to a lightweight turnout automatic switching device for shield construction. Background Art

[0002] During the shield construction of urban rail transit tunnels, the transportation by battery-powered vehicles is an essential link. In the existing technology, usually two groups of vehicles are used for alternating transportation, and two access roads are laid at the station for passing operations.

[0003] Generally speaking, when two diverging running tracks converge into the same summary running track, a turnout switching design is adopted. In the turnout switching design of the track, at least two auxiliary guide rails should be included. One end of each of the two auxiliary guide rails can move relative to the ground. A connecting rod for reinforcement is commonly connected between the ends of the two auxiliary guide rails to maintain the distance between the ends of the two auxiliary guide rails, and the movable ends of the two auxiliary guide rails are both located between the two guide rails of the summary running track.

[0004] When it is necessary to change the running track, it is necessary to drive the ends of the two auxiliary guide rails to move, and make one end of one of the auxiliary guide rails fit with the guide rail of the summary running track to achieve the purpose of facilitating the change of the running track; during the shield construction of urban rail transit tunnels, the method of manually driving the two auxiliary guide rails to move is often used to make the rail vehicle drive from the diverging running track into the summary running track, or drive into the two diverging running tracks respectively through the summary running track. However, the manual operation method, on the one hand, increases the possibility of misoperation, and on the other hand, the staff needs to enter the running area of the rail vehicle during the operation process, thus increasing the work risk of the staff and making it inconvenient to change the running track of the rail vehicle. Summary of the Invention

[0005] In order to facilitate the change of the running track of the rail vehicle, this application provides a lightweight turnout automatic switching device for shield construction.

[0006] A lightweight turnout automatic switching device for shield construction provided by this application adopts the following technical solutions:

[0007] A lightweight turnout automatic switching device for shield construction includes a driving rod for driving the movement of the ends of two auxiliary guide rails and a linear driving source. The linear driving source is installed on the foundation, and the linear driving source can be used to drive the driving rod to move;

[0008] The automatic switching device further includes a processor. First turnout induction switches are installed on both sides of the two diverging running tracks. Two input ends of the processor are electrically connected to two output ends of the first turnout induction switches in a one-to-one correspondence to receive the information on the entry of the rail vehicle fed back by the first turnout induction switches. A control end of the processor is electrically connected to a control end of the linear drive source. The processor controls the linear drive source to act in response to the information on the entry of the rail vehicle.

[0009] By adopting the above technical solution, in order to facilitate changing the running track of the rail vehicle, when there is a rail vehicle entering the converging running track from the diverging running track, the two first turnout induction switches can identify the incoming rail vehicle and convert the identified signal into the information on the entry of the rail vehicle. Then, the processor controls the drive source to drive the linear drive source to act according to the information on the entry of the rail vehicle. The linear drive source drives the two auxiliary guide rails to act, so as to facilitate the rail vehicle to enter the diverging running track from the converging running track. At the same time, when the rail vehicle needs to enter the diverging running track from the converging running track, the staff only needs to input a control instruction for controlling the linear drive source to act into the processor, and then the offset direction of the ends of the two auxiliary guide rails can be controlled, thereby achieving the purpose of facilitating the change of the running track of the rail vehicle.

[0010] Preferably, second turnout induction switches are installed on the two guide rails corresponding to the converging running track. The two second turnout induction switches are both used to sense the offset direction of the auxiliary guide rails. Output ends of the two second turnout induction switches are electrically connected to input ends of the processor in a one-to-one correspondence to output the turnout offset direction induction information.

[0011] By adopting the above technical solution, the two second turnout induction switches are used to facilitate the processor to verify the offset direction of the two auxiliary guide rails.

[0012] Preferably, third turnout induction switches are arranged corresponding to the two diverging running tracks. The third turnout induction switches are used to sense the running information of the rail vehicle in the corresponding diverging running track where the rail vehicle is located. Two output ends of the third turnout induction switches are electrically connected to two input ends of the processor in a one-to-one correspondence to receive the rail vehicle running information.

[0013] The automatic switching device further includes an acoustic-optic alarm device for broadcasting the running state of the rail vehicle. The acoustic-optic alarm device is electrically connected to the control end of the processor. The processor generates alarm information for controlling the acoustic-optic alarm device in response to the information on the entry of the rail vehicle, the turnout offset direction induction information, and the rail vehicle running information.

[0014] By adopting the above technical solution, after the processor receives the information that the rail vehicle enters, the driving condition of the rail vehicle is announced through the acoustic-optic alarm device. At the same time, the processor can also control the acoustic-optic alarm device to announce or give a light reminder respectively through the switch rail deflection direction sensing information and the rail vehicle operation information, so as to remind the staff of the operation condition of the rail vehicle.

[0015] Preferably, a locking assembly is arranged between the two auxiliary guide rails. The locking assembly includes a locking motor, a steel cable, a fixed pulley, a pulling block and a pulling rod. The locking motor and the fixed pulley are both installed on the foundation, and the fixed pulley is located between the two auxiliary guide rails;

[0016] Both ends of the pulling rod are fixedly connected to the two auxiliary guide rails in a one-to-one correspondence. The pulling block is fixedly connected to the pulling rod; there are two steel cables. One ends of the two steel cables are wound around the output shaft of the locking motor. The winding directions of the two steel cables on the locking motor are opposite, and the other ends of the two steel cables are both connected to the pulling block; one of the steel cables is matched with the fixed pulley.

[0017] By adopting the above technical solution, after the two auxiliary guide rails move to the designated positions, the locking motor is driven to move the two pulling steel cables. At this time, under the action of the fixed pulley, the two steel cables are both in a tensioned state, so as to facilitate reducing the possibility of displacement at the end of the auxiliary guide rail when the rail vehicle travels onto the auxiliary guide rail.

[0018] Preferably, the locking motor is located on the same side of the two auxiliary guide rails. A sliding sleeve is penetrated through the guide rail on the side of the summary operation rail close to the locking motor; a kidney-shaped hole for the sliding sleeve to pass through is formed in one of the auxiliary guide rails, and the two steel cables are both arranged through the sliding sleeve.

[0019] By adopting the above technical solution, the sliding sleeve can reduce the friction between the two steel cables, the auxiliary guide rail and the guide rail of the summary operation rail.

[0020] Preferably, tension springs are fixedly connected to the pulling block corresponding to the two steel cables, and the end parts of the two steel cables are fixedly connected to the pulling block through the two tension springs respectively.

[0021] By adopting the above technical solution, by using the tension springs, it is convenient to play a buffering role and reduce the possibility of rigid fracture of the steel cables.

[0022] Preferably, two sets of cleaning components are provided corresponding to the two auxiliary guide rails. The cleaning component includes a pushing block and a lead screw. The lead screw is rotatably installed in the guide rail of the summary operation track. The pushing block is threadedly connected to the lead screw and is slidably connected to the guide rail of the summary operation track. A driving component for driving the rotation of the lead screw is also installed on the guide rail of the summary operation track.

[0023] By adopting the above technical solution, when the end of the auxiliary guide rail moves to one side close to one of the guide rails of the summary operation track, part of the gravel or debris can be cleaned by the cleaning component. Specifically, the driving component drives the rotation of the lead screw, and the rotation of the lead screw drives the movement of the pushing block, so that part of the gravel or debris can be cleaned by the cleaning component, reducing the difficulty of the end of the auxiliary guide rail moving to one side close to one of the guide rails of the summary operation track.

[0024] Preferably, the driving component includes a driving screw, a threaded cylinder, a driving gear, a driven gear, a first bevel gear and a second bevel gear. The driving gear and the driven gear are both rotatably connected to the guide rail of the summary operation track, and the driven gear meshes with the driving gear.

[0025] The threaded cylinder is fixedly connected to the driving gear. The threaded cylinder is sleeved on the driving screw. The driving screw is threadedly connected to the threaded cylinder, and the end of the driving screw abuts against the auxiliary guide rail.

[0026] The first bevel gear is fixedly connected to the driven gear. The second bevel gear is fixedly connected to the lead screw, and the first bevel gear meshes with the second bevel gear.

[0027] By adopting the above technical solution, during the movement of the auxiliary guide rail, the auxiliary guide rail pushes the driving screw to move. The movement of the driving screw drives the rotation of the threaded cylinder. The rotation of the threaded cylinder drives the rotation of the driving gear. The rotation of the driving gear drives the rotation of the driven gear. The rotation of the driven gear drives the rotation of the first bevel gear. The rotation of the first bevel gear drives the rotation of the second bevel gear. The rotation of the second bevel gear drives the rotation of the lead screw, thus facilitating the purpose of driving the rotation of the lead screw.

[0028] Preferably, a T-shaped slide rail is fixedly connected to the auxiliary guide rail. A roller is rotatably connected to the end of the lead screw. The roller is in rolling connection with the T-shaped slide rail.

[0029] By adopting the above technical solution, by using the T-shaped slide rail and the roller, on the one hand, it is convenient to reduce the friction between the driving screw and the auxiliary guide rail. On the other hand, when the auxiliary guide rail moves to the side away from the guide rail of the summary operation track, it is convenient to drive the roller and the lead screw to move simultaneously.

[0030] Preferably, a pushing frame is sleeved on the pushing block. The pushing block is slidably connected to the inner side wall of the pushing frame. A pressing spring is fixedly connected to the inner side wall of the pushing frame, and the other end of the pressing spring is fixedly connected to the pushing block. An abutting block is also fixedly connected in the pushing frame, and the abutting block can abut against the pushing block.

[0031] By adopting the above technical solution, the use of the pushing frame facilitates enhancing the range for cleaning gravel and sundries. At the same time, when the auxiliary guide rail contacts the main running track guide rail, under the action of the abutting block, the pushing frame can support the auxiliary guide rail.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] In order to facilitate changing the running track of the rail vehicle, when a rail vehicle enters the main running track from the branch running track, the two first turnout induction switches can identify the approaching rail vehicle and convert the identified signal into the rail vehicle entry information. Then, the processor controls the drive source to drive the linear drive source to act according to the rail vehicle entry information. The action of the linear drive source drives the two auxiliary guide rails to act, so that the rail vehicle can enter the branch running track from the main running track. At the same time, when it is necessary to enter the branch running track from the main running track, the staff only needs to input a control instruction for controlling the action of the linear drive source to the processor, and then the offset direction of the ends of the two auxiliary guide rails can be controlled, thereby achieving the purpose of facilitating the change of the running track of the rail vehicle.

[0034] After the processor receives the rail vehicle entry information, it broadcasts the running situation of the rail vehicle through the sound and light alarm device. At the same time, the processor can also control the sound and light alarm device to broadcast or give a light reminder respectively through the turnout offset direction induction information and the rail vehicle running information to remind the staff of the running situation of the rail vehicle.

[0035] The use of the pushing frame facilitates enhancing the range for cleaning gravel and sundries. At the same time, when the auxiliary guide rail contacts the main running track guide rail, under the action of the abutting block, the pushing frame can support the auxiliary guide rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is the overall structural schematic diagram of the embodiment of the present application.

[0037] Figure 2 is the processor control block diagram in the embodiment of the present application.

[0038] Figure 3 is the structural schematic diagram of the cooperation between the two auxiliary guide rails and the two guide rails of the main running track in the embodiment of the present application.

[0039] Figure 4 It is a schematic structural diagram of the gap between the guide rail and the auxiliary guide rail of the aggregated running track in the embodiment of the present application.

[0040] Figure 5 It is a schematic structural diagram highlighting the cleaning component and the driving component in the embodiment of the present application.

[0041] Figure 6 It is a schematic structural diagram highlighting the cleaning component and the driving component in the embodiment of the present application.

[0042] Explanation of reference numerals: 1. Aggregated running track; 2. Diverging running track; 3. Auxiliary guide rail; 4. Linear driving source; 41. Driving rod; 42. Processor; 43. First turnout induction switch; 44. Second turnout induction switch; 45. Third turnout induction switch; 46. Acousto-optic alarm device; 5. Locking component; 51. Locking motor; 52. Steel cable; 53. Fixed pulley; 54. Pulling block; 55. Pulling rod; 56. Sliding sleeve; 57. Tensile spring; 6. Cleaning component; 61. Pushing block; 62. Lead screw; 63. Mounting block; 7. Driving component; 71. Driving screw; 72. Threaded barrel; 73. Driving gear; 74. Driven gear; 75. First bevel gear; 76. Second bevel gear; 77. T-shaped slide rail; 78. Roller; 8. Pushing frame; 81. Pressing spring; 82. Abutting block. Detailed implementation manners

[0043] The following will further elaborate on the present application in conjunction with the attached Figure 1-6 drawings.

[0044] The embodiment of the present application discloses a lightweight turnout automatic switching device for shield construction. Referring to Figure 1 , the lightweight turnout for shield construction includes an aggregated running track 1 and two diverging running tracks 2. Rail vehicles can enter the aggregated running track 1 through the two diverging running tracks 2, or enter the aggregated running track 1 through the two diverging running tracks 2. An auxiliary guide rail 3 is installed between the two guide rails of the aggregated running track 1. A connecting rod is fixedly connected between the two auxiliary guide rails 3 to facilitate maintaining the distance between the two auxiliary guide rails 3. By moving the ends of the two auxiliary guide rails 3, the end of one of the auxiliary guide rails 3 can be made to fit with the guide rail of the aggregated running track 1, so as to facilitate the movement of rail vehicles from the two diverging running tracks 2 to the aggregated running track 1, or from the aggregated running track 1 to the two diverging running tracks 2.

[0045] As Figure 1 and Figure 2As shown, the lightweight turnout automatic switching device for shield construction includes a driving rod 41, a linear driving source 4, a processor 42, a first turnout induction switch 43, a second turnout induction switch 44, a third turnout induction switch 45, and an acoustic-optic alarm device 46.

[0046] Among them, two first turnout induction switches 43 are arranged corresponding to two diverging running tracks 2, and the two first turnout induction switches 43 are located on the side of the two diverging running tracks 2 away from each other's guide rails. The two first turnout induction switches 43 are used to detect the entry of rail vehicles, so as to generate rail vehicle entry information.

[0047] Two second turnout induction switches 44 are respectively installed on the two guide rails of the aggregated running track 1. The two second turnout induction switches 44 are used to detect the gaps between the two guide rails of the aggregated running track 1 and the two auxiliary guide rails 3, so as to be able to sense the offset direction of the auxiliary guide rails 3 and generate turnout offset direction induction information.

[0048] Two third turnout induction switches 45 are located on the side of the two diverging running tracks 2 away from each other's guide rails, and the third turnout induction switches 45 are between the first turnout induction switches 43 and the second turnout induction switches 44. The third turnout induction switches 45 are used to sense the situation of the rail vehicle in the corresponding diverging running track 2 and generate rail vehicle running information.

[0049] Multiple input ends of the processor 42 are electrically connected to the two first turnout induction switches 43, the two second turnout induction switches 44, and the two third turnout induction switches 45 in one-to-one correspondence. The processor 42 is used to receive rail vehicle entry information, turnout offset direction induction information, and rail vehicle running information.

[0050] As Figure 2 and Figure 3 shown, the linear driving source 4 can be a linear driving cylinder. The linear driving source 4 is installed on the ground and is located on one side of the aggregated running track 1. The driving rod 41 is fixedly connected to the output shaft of the linear driving source 4. The driving rod 41 passes through one of the guide rails of the aggregated running track 1 and is fixedly connected to the ends of the two auxiliary guide rails 3. The control end of the processor 42 is electrically connected to the control end of the linear driving source 4. The processor 42 can control the linear driving source 4 to act in response to the rail vehicle entry information.

[0051] At the same time, during the entry or exit of the rail vehicle, the processor 42 generates alarm information in response to the rail vehicle entry information, the turnout offset direction induction information, and the rail vehicle running information. The alarm information can include the offset direction of the two auxiliary guide rails 3 and the running situation of the rail vehicle, so that the processor 42 controls the acoustic-optic alarm device 46 to act.

[0052] As Figure 3and Figure 4 As shown in Figure 4 , a locking assembly 5 is further provided between the two auxiliary guide rails 3. The locking assembly 5 includes a locking motor 51, a steel cable 52, a fixed pulley 53, a pulling block 54, and a pulling rod 55. The locking motor 51 and the fixed pulley 53 are fixedly installed on the foundation, and the locking motor 51 and the linear drive source 4 are located on the same side of the summary operation track. The fixed pulley 53 is located between the two auxiliary guide rails 3. The control end of the locking motor 51 is electrically connected to one of the control ends of the processor 42, so that the processor 42 controls the locking motor 51 to act while controlling the linear drive source 4 to work.

[0053] Both ends of the pulling rod 55 are fixedly connected to the two auxiliary guide rails 3 in a one-to-one correspondence. The pulling rod 55 has two parts, and the two parts of the pulling rod 55 are fixedly connected through the pulling block 54. Tension springs 57 are fixedly connected to both opposite sides of the pulling block 54. There are two steel cables 52. A winding roller is installed on the locking motor 51. One end of each of the two steel cables 52 is wound around the winding roller of the locking motor 51, and the winding directions of the two steel cables 52 on the winding roller are opposite. The other ends of the two steel cables 52 are fixedly connected to the two tension springs 57 in a one-to-one correspondence, and one of the steel cables 52 is matched with the fixed pulley 53.

[0054] As Figure 3 shown in Figure 3 , a sliding sleeve 56 is penetrated through the guide rail on the side of the summary operation track 1 close to the locking motor 51, and the sliding sleeve 56 is fixedly connected to the guide rail on the side of the summary operation track 1 close to the locking motor 51; a kidney-shaped hole for the sliding sleeve 56 to pass through is provided on one of the auxiliary guide rails 3, and both steel cables 52 are arranged through the sliding sleeve 56.

[0055] As Figure 3 and Figure 4 shown in Figure 3 and Figure 4 , during the process of moving the ends of the two auxiliary guide rails 3, the processor 42 controls the locking motor 51 to act, so that both steel cables 52 are in a tensioned state, thereby enhancing the stability of the two auxiliary guide rails 3 and reducing the possibility of the auxiliary guide rail 3 shaking during the contact process between the rail vehicle and the auxiliary guide rail 3. At the same time, through the two strong tension springs 57, the possibility of the steel cable 52 breaking rigidly is reduced.

[0056] As Figure 3 and Figure 5 shown in Figure 3 and Figure 5 , two sets of cleaning assemblies 6 are provided corresponding to the two auxiliary guide rails 3, and the cleaning assemblies 6 are located at the gap between the guide rail of the summary operation track 1 and the auxiliary track. Here, one set of cleaning assemblies 6 is used for illustration.

[0057] As Figure 5 and Figure 6As shown, the cleaning component 6 includes a mounting plate, a pushing block 61, and a lead screw 62. The mounting plate is fixedly connected to the guide rail of the summary operation track 1. The lead screw 62 is disposed through the mounting plate and is rotatably connected to the mounting plate. The pushing block 61 is slidably connected to the guide rail of the summary operation track 1. The lead screw 62 is disposed through the pushing block 61 and is threadedly connected to the pushing block 61.

[0058] A driving component 7 for driving the rotation of the lead screw 62 is installed on the summary operation track 1. The driving component 7 includes a driving screw 71, a threaded cylinder 72, a driving gear 73, a driven gear 74, a first bevel gear 75, and a second bevel gear 76. The driving gear 73 and the driven gear 74 are both rotatably installed on the guide rail of the summary operation track 1, and the driving gear 73 meshes with the driven gear 74. The number of teeth of the driving gear 73 is greater than the number of teeth of the driven gear 74. The threaded cylinder 72 is fixedly connected to the driving gear 73. The threaded cylinder 72 is sleeved on the driving screw 71. The driving screw 71 is threadedly connected to the threaded cylinder 72, and the end of the driving screw 71 abuts against the auxiliary guide rail 3.

[0059] The first bevel gear 75 is fixedly connected to the driven gear 74, the second bevel gear 76 is fixedly connected to the lead screw 62, and the first bevel gear 75 meshes with the second bevel gear 76.

[0060] As Figure 5 and Figure 6 shown, a T-shaped slide rail 77 is fixedly connected to the auxiliary guide rail 3. Two rollers 78 are rotatably installed at the end of the driving screw 71 away from the driving gear 73. Both of the two rollers 78 are in rolling connection with the side wall of the T-shaped slide rail 77.

[0061] A pushing frame 8 is sleeved on the pushing block 61. The pushing block 61 is slidably connected to the inner side wall of the pushing frame 8. A plurality of pressing springs 81 are fixedly connected to the inner side wall of the pushing frame 8. The other end of the pressing spring 81 is fixedly connected to the pushing block 61. Two abutting blocks 82 are also fixedly connected in the pushing frame 8. When the auxiliary guide rail 3 is attached to the summary operation track 1, the two abutting blocks 82 can abut against the pushing block 61, so as to facilitate supporting the auxiliary guide rail 3.

[0062] When the auxiliary guide rail 3 moves toward the side close to the summary operation track 1, the auxiliary guide rail 3 can push the driving screw 71 to move. The movement of the driving screw 71 drives the rotation of the threaded cylinder 72. The rotation of the threaded cylinder 72 drives the rotation of the driving gear 73. The rotation of the driving gear 73 drives the rotation of the driven gear 74 and the first bevel gear 75. The rotation of the first bevel gear 75 drives the rotation of the second bevel gear 76. The rotation of the second bevel gear 76 drives the rotation of the lead screw 62. The rotation of the lead screw 62 drives the movement of the pushing block 61 and the pushing frame 8, so as to facilitate cleaning the gravel or sundries at the gap between the guide rail of the summary operation track 1 and the auxiliary guide rail 3.

[0063] The implementation principle of the lightweight turnout automatic switching device for shield construction in an embodiment of the present application is as follows: To facilitate changing the running track of a rail vehicle, when a rail vehicle enters the aggregated running track 1 from the diverging running track 2, two first turnout induction switches 43 can identify the approaching rail vehicle and convert the identified signal into rail vehicle entry information. Then, the processor 42 controls the driving source to drive the linear driving source 4 based on the rail vehicle entry information. The action of the linear driving source 4 drives the two auxiliary guide rails 3 to facilitate the rail vehicle to enter the diverging running track 2 from the aggregated running track 1. At the same time, when the rail vehicle needs to enter the diverging running track 2 from the aggregated running track 1, the staff only needs to input a control instruction for controlling the action of the linear driving source 4 to the processor 42, and then the offset direction of the ends of the two auxiliary guide rails 3 can be controlled, thereby achieving the purpose of facilitating the change of the running track of the rail vehicle.

[0064] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A lightweight turnout automatic switching device for shield construction, characterized in that: It includes a driving rod (41) and a linear driving source (4) for driving the movement of the ends of two auxiliary guide rails (3). The linear driving source (4) is installed on the foundation, and the linear driving source (4) can be used to drive the driving rod (41) to move; The automatic switching device further includes a processor (42). First turnout induction switches (43) are installed on both sides of the two diverging running tracks (2). Two input ends of the processor (42) are electrically connected to two output ends of the first turnout induction switches (43) in one-to-one correspondence to receive the track vehicle entry information fed back by the first turnout induction switches (43). The control end of the processor (42) is electrically connected to the control end of the linear driving source (4). The processor (42) controls the linear driving source (4) to act in response to the track vehicle entry information; A locking assembly (5) is arranged between the two auxiliary guide rails (3). The locking assembly (5) includes a locking motor (51), a steel cable (52), a fixed pulley (53), a pulling block (54) and a pulling rod (55). The locking motor (51) and the fixed pulley (53) are both installed on the foundation, and the fixed pulley (53) is located between the two auxiliary guide rails (3); Both ends of the pulling rod (55) are fixedly connected to the two auxiliary guide rails (3) in one-to-one correspondence. The pulling block (54) is fixedly connected to the pulling rod (55); There are two steel cables (52). One ends of the two steel cables (52) are wound around the output shaft of the locking motor (51). The winding directions of the two steel cables (52) on the locking motor (51) are opposite, and the other ends of the two steel cables (52) are both connected to the pulling block (54); One of the steel cables (52) is matched with the fixed pulley (53).

2. The lightweight turnout automatic switching device for shield construction according to claim 1, characterized in that: Second turnout induction switches (44) are installed on both guide rails corresponding to the summary running track (1). The two second turnout induction switches (44) are both used to sense the offset direction of the auxiliary guide rail (3); The output ends of the two second turnout induction switches (44) are electrically connected to the input end of the processor (42) in one-to-one correspondence to output the turnout offset direction induction information.

3. The lightweight turnout automatic switching device for shield construction according to claim 2, characterized in that: Third turnout induction switches (45) are arranged corresponding to the two diverging running tracks (2). The third turnout induction switches (45) are used to sense the track vehicle running information of the track vehicle in the corresponding diverging running track (2); The two output ends of the third turnout induction switches (45) are electrically connected to the two input ends of the processor (42) in one-to-one correspondence to receive the track vehicle driving information; The automatic switching device further includes an acoustic-optic alarm device (46) for broadcasting the running state of the track vehicle. The acoustic-optic alarm device (46) is electrically connected to the control end of the processor (42). The processor (42) responds to the track vehicle entry information, the turnout offset direction induction information and the track vehicle running information to generate alarm information for controlling the acoustic-optic alarm device (46).

4. The lightweight turnout automatic switching device for shield construction according to claim 1, wherein: The locking motor (51) is located on the same side of the two auxiliary guide rails (3). A sliding sleeve (56) is penetrated through the guide rail on the side of the summary operation track (1) close to the locking motor (51); a waist-shaped hole for the sliding sleeve (56) to pass through is formed in one of the auxiliary guide rails (3), and the two steel cables (52) are both arranged through the sliding sleeve (56).

5. The lightweight turnout automatic switching device for shield construction according to claim 4, characterized in that: Correspondingly, tension springs (57) are fixedly connected to the pulling block (54) for the two steel cables (52), and the end parts of the two steel cables (52) are fixedly connected to the pulling block (54) through the two tension springs (57) respectively.

6. The lightweight turnout automatic switching device for shield construction according to claim 4, characterized in that: Two sets of cleaning components (6) are arranged corresponding to the two auxiliary guide rails (3). The cleaning component (6) includes a pushing block (61) and a lead screw (62). The lead screw (62) is rotatably installed in the guide rail of the summary operation track (1). The pushing block (61) is threadedly connected to the lead screw (62), and the pushing block (61) is slidably connected to the guide rail of the summary operation track (1); a driving component (7) for driving the lead screw (62) to rotate is further installed on the guide rail of the summary operation track (1).

7. The lightweight turnout automatic switching device for shield construction according to claim 6, wherein: The driving component (7) includes a driving screw (71), a threaded barrel (72), a driving gear (73), a driven gear (74), a first bevel gear (75) and a second bevel gear (76). The driving gear (73) and the driven gear (74) are both rotatably connected to the guide rail of the summary operation track (1), and the driven gear (74) is meshed with the driving gear (73). The threaded barrel (72) is fixedly connected to the driving gear (73). The threaded barrel (72) is sleeved on the driving screw (71). The driving screw (71) is threadedly connected to the threaded barrel (72), and the end part of the driving screw (71) abuts against the auxiliary guide rail (3). The first bevel gear (75) is fixedly connected to the driven gear (74). The second bevel gear (76) is fixedly connected to the lead screw (62), and the first bevel gear (75) is meshed with the second bevel gear (76).

8. The lightweight turnout automatic switching device for shield construction according to claim 7, characterized in that: A T-shaped slide rail (77) is fixedly connected to the auxiliary guide rail (3). A roller (78) is rotatably connected to the end part of the lead screw (62), and the roller (78) is in rolling connection with the T-shaped slide rail (77).

9. The lightweight turnout automatic switching device for shield construction according to claim 8, characterized in that: A pushing frame (8) is sleeved on the pushing block (61). The pushing block (61) is slidably connected to the inner side wall of the pushing frame (8). A pressing spring (81) is fixedly connected to the inner side wall of the pushing frame (8), and the other end of the pressing spring (81) is fixedly connected to the pushing block (61); an abutting block (82) is further fixedly connected in the pushing frame (8), and the abutting block (82) can abut against the pushing block (61).

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