A tunnel secondary lining steel reinforcement transmission system

Abstract

This invention relates to the field of engineering construction equipment technology, specifically disclosing a tunnel secondary lining rebar transmission system. The system includes a main drive module for rotating and forward transmitting the rebar; a secondary drive module for receiving the rebar transmitted from the main drive module; a spraying module for spraying the rebar on the secondary drive module, including marking and rust removal spraying; and a control module for measuring the rebar's movement distance on the secondary drive module in real time when the rebar is received, identifying the rebar position where the movement distance equals the corresponding bending distance, and determining the spraying point; and controlling the spraying module. This solution enables simultaneous rebar transmission and bending point determination, avoiding the need for operators to remeasure bending points after transportation, significantly saving operator time.

Description

Technical Field

[0001] This invention relates to the field of engineering construction equipment technology, specifically to a tunnel secondary lining steel reinforcement transmission system. Background Technology

[0002] The tunnel's secondary lining has a large cross-section, and reinforcement bars need to be laid and tied around the entire lining. Before tying, the corresponding reinforcement bars need to be transported to their designated locations. However, considering the tunnel's length and narrow space, transporting these bars by vehicle is difficult, lacks flexibility, and results in low overall transport efficiency. Furthermore, the amount of reinforcement bars that can be stored in the tunnel is limited, and vehicle transport could cause congestion, hindering operator movement and reducing the risk of malfunctions. After transporting the reinforcement bars to their designated locations, operators will process them as needed, such as cutting and bending them. This involves estimating or measuring the reinforcement bars to determine bending points, then using bending or cutting tools to cut or bend them before tying them to their corresponding locations. Because the amount of reinforcement bars to be laid in the tunnel is large, and the amount requiring cutting and bending is also significant, the processing time for all the required cutting and bending is substantial. Summary of the Invention

[0003] The present invention aims to provide a tunnel secondary lining steel reinforcement transmission system that can simultaneously transmit steel reinforcement and determine the bending points of the steel reinforcement, avoiding the need for operators to remeasure the bending points after transportation is completed, thus greatly saving the operators' time.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a tunnel secondary lining steel reinforcement transmission system, comprising:

[0005] The main drive module is used to rotate and transmit the reinforcing bars forward.

[0006] The secondary drive module is used to receive the steel bars transmitted from the main drive module and rotate them forward for transmission.

[0007] A spraying module is used to spray the steel bars on the secondary transmission module, and the spraying process includes marking spraying and rust removal spraying.

[0008] The control module is used to obtain the bending distances of the reinforcing bars that need to be bent from the BIM system; it is used to measure the movement distance of the reinforcing bars in the secondary transmission module in real time when the secondary transmission module receives the reinforcing bars, and to identify the position of the reinforcing bars where the movement distance is equal to the corresponding bending distance, thus obtaining the spraying points; it is used to control the spraying module to mark and spray the reinforcing bars on the secondary transmission module at the spraying points, and to perform rust removal spraying on the reinforcing bars at non-spraying points.

[0009] The principle and advantages of this solution are as follows: In practical application, the main drive module rotates and transmits the reinforcing bar forward. Even after passing through the main drive module, the reinforcing bar continues to rotate as it moves forward. It is then transmitted to the secondary drive module, which receives the corresponding reinforcing bar from the main drive module. At this time, the reinforcing bar continues to rotate forward. Simultaneously, the control module measures the distance the reinforcing bar moves in the secondary drive module in real time when it receives the corresponding reinforcing bar. Since the control module obtains the bending distances of the reinforcing bars that need to be bent from the BIM system, during the transmission of the reinforcing bar, as long as the corresponding bending distance equals the reinforcing bar's movement distance, the position of the reinforcing bar on the secondary drive module is identified as a spraying point. The control module then controls the spraying module to mark and spray the spraying point, while at non-spraying points, the control module controls the spraying module to perform rust removal spraying on the reinforcing bar.

[0010] 1. After the reinforcing bars are transferred to the secondary transmission module, the spraying module applies rust-removing spray to the non-spraying areas of the reinforcing bars and marks these areas. This marking allows operators to clearly identify the bending points of the reinforcing bars, eliminating the need for manual measurement of bending distances later. Instead, operators can directly bend the reinforcing bars based on the paint on the sprayed points, significantly saving time and effort. In short, the bending points of the reinforcing bars are determined during the transfer process, eliminating the need for measurement and confirmation after transfer. Furthermore, the rust-removing spray effectively cleans and removes rust from the non-bending areas of the reinforcing bars.

[0011] 2. The main drive module allows the steel bars to not only be transported forward but also rotated during the transmission process. This ensures a more comprehensive cleaning of the steel bars during rust removal and spraying, resulting in a better overall cleaning effect.

[0012] 3. The reference for the distance to be marked on the rebar is obtained from the BIM system, which makes the data to be marked more realistic and accurate, greatly improving the accuracy and realism of the subsequent rebar bending.

[0013] Preferably, as an improvement, the main transmission module includes a left rotating wheel, a right rotating wheel, and a first motor for controlling the rotation of the left and right rotating wheels. The motor shafts of the two first motors are fixedly connected to the first rotating shafts of the left and right rotating wheels, respectively. The left rotating wheel tilts backward and rotates clockwise, and the right rotating wheel tilts forward and rotates counterclockwise. The gap between the left and right rotating wheels is the insertion end of the reinforcing bar.

[0014] The secondary transmission module includes left and right support frames, and a first rotating shaft is fixedly connected between the two support frames in a direction that is horizontal and perpendicular to the direction of steel bar transmission.

[0015] Beneficial effects: Through the action of the first motor, the left and right rotating wheels rotate relative to each other. Since the left rotating wheel is tilted backward and rotates clockwise, while the right rotating wheel is tilted forward and rotates counterclockwise, when the corresponding steel bar is inserted from the insertion end, the left rotating wheel will apply a forward and downward force to one side of the steel bar, while the right rotating wheel will apply a forward and upward force to the other side of the steel bar. In this way, the steel bar can move forward and rotate at the same time as it passes through.

[0016] As the reinforcing bar passes through the left and right rotating wheels, it is subjected to a forward and downward force from the left rotating wheel, and a forward and upward force from the right rotating wheel. This allows the reinforcing bar to rotate while moving forward, resulting in a better cleaning effect when the spraying module sprays air onto the reinforcing bar.

[0017] Preferably, as an improvement, the spraying module includes a pigment supply device, an air supply device, and a spray gun;

[0018] The control module includes a controller, a communication module, a switching valve, a Hall sensor, a pressure sensor, and a magnet.

[0019] The controller is electrically connected to the communication module, the switching valve, the Hall sensor, and the pressure sensor respectively; a mounting groove is provided on one end of the first rotating shaft, and the magnet is placed in the mounting groove; the Hall sensor is placed on one side of the mounting groove.

[0020] The pressure sensor is located at the contact point between the support frame and the first rotating shaft; the air supply device is connected to the switching valve through the first pipe, the pigment supply device is connected to the switching valve through the second pipe, and the switching valve is connected to the spray gun through the third pipe; the spray gun is mounted on the support frame and is aimed at the reinforcing steel bar.

[0021] The controller is used to obtain the bending distances of the steel bars that need to be bent from the BIM system through the communication module; the controller is used to detect whether the steel bars are received by the secondary transmission module through the pressure sensor; when the controller detects that the steel bars are received by the secondary transmission module, it uses Hall sensors and magnets to monitor the number of rotations of the steel bars on the first rotation axis in real time, calculates the steel bar movement distance in the secondary transmission module based on the pre-stored circumference of the first rotation axis, and identifies the position of the steel bar where the movement distance is equal to the corresponding bending distance, thus obtaining the spraying point.

[0022] The controller is used to control the switching valve to switch pipelines when the spraying point is identified.

[0023] Beneficial Effects: To ensure immediate detection when the secondary transmission module receives the reinforcing bar, a pressure sensor positioned at the contact point between the support frame and the first rotating shaft collects changes in pressure values ​​for detection. When the corresponding pressure value increases, it is determined that the reinforcing bar has been received by the secondary transmission module, meaning the reinforcing bar is in contact with the first rotating shaft. As the reinforcing bar continues to move forward, the first rotating shaft also rotates accordingly. During this rotation, the magnet on the first rotating shaft returns to the position of the Hall sensor with each rotation. As the magnet approaches the Hall sensor, the sensor receives a sinusoidal signal based on the magnet's proximity. This signal, along with... The pre-stored circumference of the first rotating axis allows for the calculation of the rebar's movement distance along the first rotating axis. Since the controller obtains various bending distances from the BIM system via the communication module, a bending distance is selected during each rebar transmission process. When the corresponding rebar movement distance equals the bending distance, the controller controls the switching valve to connect the corresponding second and third pipes, causing the spray gun to spray the corresponding pigment. Because the spray gun is mounted on the support frame and aimed at the rebar, the position where the pigment is sprayed is exactly where the rebar movement distance equals the bending distance, thus marking the rebar bending point. This allows the operator to bend the rebar using the bending tool based on the corresponding marked point.

[0024] At other times, the corresponding controller will control the switching valve to connect the corresponding first and third pipes, so that the spray gun sprays air. During the entire spraying process, the steel bars are moving and rotating at the same time, thus achieving the cleaning of the steel bars.

[0025] 1. By using pressure sensors and Hall effect sensors, the movement distance of the reinforcing bars on the first rotating axis can be accurately measured in real time, greatly improving the accuracy and reliability of the measurement data.

[0026] 2. During the rebar transport process, when the spraying point is reached, the corresponding controller will control the switching valve to connect the second and third pipelines. At this time, the pigment supply equipment will supply pigment, causing the spray gun to spray pigment. Before reaching the spraying point, the corresponding controller will control the switching valve to connect the first and third pipelines. In this way, air spraying can be performed on the parts other than the marked position throughout the transport process, which also achieves the cleaning and preliminary rust removal effect on the rebar.

[0027] Preferably, as an improvement, a fixing block is provided at the front end between the left and right rotating wheels, and a limiting hole is provided on the fixing block for the reinforcing bar to extend into, and the limiting hole is at the same height as the left rotating wheel.

[0028] Beneficial effect: The setting of the limiting hole restricts the vertical movement of the reinforcing bar, thus avoiding the problem of the reinforcing bar detaching from the left and right rotating wheels when it moves forward and rotates.

[0029] Preferably, as an improvement, it also includes a transmission module, which includes multiple transmission sub-modules, each including a support base, a support rod, a first rotating rod, and a second motor.

[0030] Two support rods are provided, and the two support rods are respectively fixed on the upper end surface of the support base. The first rotating rod is disposed between the two support rods, passing through the corresponding support rods, and one end of the first rotating rod is fixedly connected to the motor shaft of the second motor.

[0031] Beneficial effects: After the steel bars are marked and cleaned, it is necessary to transport them to the corresponding operators. Through multiple transmission sub-modules, long-distance transmission of the marked steel bars is realized. In the specific transmission process, it is only necessary to plan the transmission path and set multiple transmission sub-modules on the transmission path to realize the transmission of steel bars.

[0032] Preferably, as an improvement, the first rotating rod is disposed in the middle of the support rod.

[0033] Beneficial effect: By setting the corresponding first rotating rod in the middle of the support rod, the support rod can be used to limit the movement of the corresponding steel bar when it is transmitted through the first rotating rod, thus preventing the steel bar from detaching from the first rotating rod and causing the steel bar to be unable to be transmitted stably.

[0034] Preferably, as an improvement, a limiting ring is provided on the support rod, the height of the limiting ring is higher than the height of the first rotating rod, and a steel sleeve is fitted on the support rod, the outer diameter of the limiting ring being larger than the inner diameter of the steel sleeve.

[0035] Beneficial effects: The steel sleeve and limiting ring enable better transmission of reinforcing bars, avoiding the large resistance caused by the contact between the reinforcing bars and the support rod during transmission, which would otherwise hinder transmission and require more power. The steel sleeve causes the steel sleeve to rotate under force when the reinforcing bars come into contact with it, thus reducing the resistance between the reinforcing bars and the steel sleeve. This also allows for a reduction in the power required by the second motor, enabling faster and more efficient transmission of reinforcing bars. Attached Figure Description

[0036] Figure 1 This is a logic block diagram of the tunnel secondary lining steel reinforcement transmission system in Embodiment 1 of the present invention.

[0037] Figure 2 This is a schematic diagram of the tunnel secondary lining steel reinforcement transmission system in Embodiment 1 of the present invention.

[0038] Figure 3 This is a top view of the tunnel secondary lining steel reinforcement transmission system in Embodiment 1 of the present invention. Detailed Implementation

[0039] The following detailed description illustrates the specific implementation method:

[0040] The markings in the accompanying drawings include: base 1, steel bar 2, fixing block 3, right rotating wheel 4, left rotating wheel 5, first rotating shaft 6, support frame 7, pigment supply equipment 8, air supply equipment 9, spray gun 10.

[0041] The basic implementation examples are as follows: Figure 1 and Figure 2 As shown: A tunnel secondary lining steel reinforcement transmission system includes a base 1, on which a main drive module, a secondary drive module, a spraying module and a control module are connected.

[0042] The main drive module is used to rotate and transmit the steel bar 2 forward.

[0043] The secondary transmission module is used to receive the steel bar 2 transmitted from the main transmission module and rotate it forward for transmission;

[0044] A spraying module is used to spray the steel bars on the secondary transmission module, and the spraying process includes marking spraying and rust removal spraying.

[0045] The control module is used to obtain the bending distances of the reinforcing bars 2 that need to be bent from the BIM system; it is used to measure the movement distance of the reinforcing bars 2 in the secondary transmission module in real time when the secondary transmission module receives the reinforcing bars 2, and identify the position of the reinforcing bars 2 where the movement distance of the reinforcing bars 2 is equal to the corresponding bending distance, so as to obtain the spraying point; it is used to control the spraying module to mark and spray the reinforcing bars 2 on the secondary transmission module at the spraying point, and to perform rust removal spraying on the reinforcing bars 2 at non-spraying points.

[0046] like Figure 3 As shown, the main transmission module includes a left rotating wheel 5, a right rotating wheel 4, and a first motor that controls the rotation of the left rotating wheel 5 and the right rotating wheel 4. The two first motors are fixed to the base 1, and their motor shafts are welded and fixed to the first rotating shafts 6 of the left rotating wheel 5 and the right rotating wheel 4, respectively. The left rotating wheel 5 is tilted backward and rotates clockwise, while the right rotating wheel 4 is tilted forward and rotates counterclockwise. The gap between the left rotating wheel 5 and the right rotating wheel 4 is the insertion end of the reinforcing bar 2. When the reinforcing bar 2 passes through the left rotating wheel 5 and the right rotating wheel 4, it receives a forward force and a downward force from the left rotating wheel 5, and a forward force and an upward force from the right rotating wheel 4, thus enabling the reinforcing bar 2 to rotate while moving forward. In this embodiment, to achieve the tilted arrangement of the left rotating wheel 5 and the right rotating wheel 4, the corresponding first motor is tilted and embedded in the base 1 during installation.

[0047] As the reinforcing bar 2 moves forward and rotates through its insertion end, it may detach from the left rotating wheel 5 and the right rotating wheel 4. Whether it detaches from above or below, this will prevent the reinforcing bar 2 from being transported. Therefore, in this embodiment, a fixing block 3 is provided at the front end between the left rotating wheel 5 and the right rotating wheel 4. The fixing block 3 has a limiting hole for the reinforcing bar 2 to enter, and this limiting hole is at the same height as the left rotating wheel 5. The fixing block 3 is welded and fixed to the base 1, and the limiting hole is located at the height of the left rotating wheel 5 at the front end between the left and right rotating wheels 5. Thus, during the transport of the reinforcing bar 2, it first passes through the limiting hole, and then is clamped between the two rotating wheels 5 and 4. Simultaneously, the limiting hole is at the same height as the left rotating wheel 5, meaning its vertical height is between the vertical height of the left rotating wheel 5. This prevents the reinforcing bar 2 from detaching and exceeding the range of the left rotating wheel 5.

[0048] The secondary transmission module includes left and right support frames 7, and a first rotating shaft 6 is fixedly connected between the two support frames 7 in a direction that is horizontal and perpendicular to the transmission direction of the steel bar 2. The support frames 7 are welded and fixed to the base 1.

[0049] In this embodiment, the spraying module includes a pigment supply device 8, an air supply device 9, and a spray gun 10; the pigment supply device 8 is used to perform marking spraying, and the air supply device 9 is used to perform rust removal spraying on the reinforcing steel bar 2.

[0050] The control module includes a controller, a communication module, a switching valve, a Hall sensor, a pressure sensor, and a magnet.

[0051] The controller is electrically connected to the communication module, the switching valve, the Hall sensor, and the pressure sensor respectively; a mounting groove is provided on one end of the first rotating shaft, and a magnet is placed in the mounting groove. In this embodiment, the magnet is welded and fixed in the mounting groove; the Hall sensor is placed on one side of the mounting groove and fixed to the base.

[0052] The pressure sensor is located at the contact point between the support frame 7 and the first rotating shaft 6. In this embodiment, a fixing groove for placing the pressure sensor is opened on the support frame at the corresponding contact point. The pressure sensor is welded and fixed in the fixing groove, and the pressure sensor is higher than the fixing groove.

[0053] The air supply device 9 is connected to the switching valve via a first pipe, and the pigment supply device 8 is connected to the switching valve via a second pipe. The switching valve is connected to the spray gun 10 via a third pipe. The spray gun 10 is mounted on the support frame 7 and is aligned with the reinforcing bar 2. In this embodiment, the spray gun 10 is welded to the support frame 7 via a fixing block. In another embodiment, the spray gun 10 is rotatably connected to the support frame 7 via a fixing block, thus making the angle of the spray gun 10 adjustable and allowing for reasonable adjustment based on its position. In this embodiment, the air supply device 9 and the pigment supply device 10 are welded to the base.

[0054] The controller is used to obtain the bending distances of the reinforcing bar 2 that needs to be bent from the BIM system through the communication module; the controller is used to detect whether the reinforcing bar 2 is received by the secondary transmission module through the pressure sensor; when the controller detects that the reinforcing bar 2 is received by the secondary transmission module, it will activate the Hall sensor. During the rotation of the first rotating shaft 6, since the reinforcing bar 2 is in close contact with the first rotating shaft 6, the distance that the reinforcing bar 2 moves is equal to the distance corresponding to the number of rotations of the first rotating shaft 6. That is, for every rotation of the reinforcing bar 2, the distance that the reinforcing bar 2 moves is the circumference of the first rotating shaft 6.

[0055] During the rotation of the first rotating shaft 6, the magnet on the first rotating shaft 6 returns to the position set by the Hall sensor with each revolution of the first rotating shaft 6. As the magnet approaches the Hall sensor, the Hall sensor receives a sine wave-like signal based on the distance of the magnet. The highest point of this signal indicates the closest position of the magnet to the Hall sensor. Therefore, the number of highest points indicates the number of revolutions. Since the circumference of the first rotating shaft 6 is pre-stored, the controller calculates the distance the rebar moves in real time based on this signal and the corresponding circumference of the first rotating shaft 6. Specifically, since the rebar 2 moves forward while in close contact with the first rotating shaft 6, the distance the rebar 2 moves is equal to the number of revolutions the first rotating shaft 6 completes. The product of the number and the circumference of the first rotating shaft 6 is used to identify the position of the reinforcing bar 2 where the moving distance of the reinforcing bar 2 is equal to the corresponding bending distance, thus obtaining the spraying point. The controller is used to control the switching valve to switch the pipeline when the spraying point is identified. Specifically, when the corresponding spraying point is identified, the corresponding switching valve is controlled by the controller to connect the corresponding second and third pipelines. Then, the corresponding pigment will be sprayed out from the second pipeline, the third pipeline, and the spray gun 10 in sequence, thereby spraying pigment at the spraying point. When the non-spraying point is identified, the corresponding switching valve is controlled by the controller to lower the corresponding first and third pipelines, and then air will be sprayed out from the first pipeline, the third pipeline, and the spray gun 10, thereby spraying air at the non-spraying point. In this way, after receiving the corresponding reinforcing bar, the operator can determine the bending point based on the color on the reinforcing bar and then use the bending tool to bend it.

[0056] The controller can be a microcontroller or a PLC. In this embodiment, an STM32 series microcontroller, specifically the STM32H7 high-performance series microcontroller, is used. The communication module includes a wireless communication module, which can be one or more of the following: WiFi module, Bluetooth module, mobile communication module, near-field communication module, ZigBee module, and LoRa module. In this embodiment, the wireless communication module includes a WiFi module.

[0057] In order to enable the steel bar 2 to be transmitted further, a transmission module is also included. The transmission module includes multiple transmission sub-modules, including a support base 1, a support rod, a first rotating rod, and a second motor.

[0058] Two support rods are provided, each welded and fixed to the upper surface of the support base. A first rotating rod is positioned between the two support rods, passing through their respective support rods, and one end of the first rotating rod is welded and fixedly connected to the motor shaft of the second motor. In this embodiment, to ensure a secure fixation of the motor, the second motor is welded and fixed to the support base. In this embodiment, the first rotating rod rotates due to the drive of the second motor, thereby moving the reinforcing bar forward and achieving transmission over a longer distance.

[0059] The first rotating rod is located in the middle of the support rod, and a limiting ring is welded and fixed to the support rod. The height of the limiting ring is higher than the height of the first rotating rod. In this embodiment, the height difference between the limiting ring and the first rotating rod is less than the diameter of the reinforcing bar 2. A steel sleeve is fitted onto the support rod, and the outer diameter of the limiting ring is larger than the inner diameter of the steel sleeve. In this embodiment, to prevent the gap between the steel sleeve and the support rod from being too large, which could cause the steel sleeve to disengage from the limiting ring when rotated under force, the steel sleeve and the support rod are rotately fitted with a small gap. This reduces the resistance when the reinforcing bar contacts or touches the support rod during transmission, resulting in better transmission efficiency.

[0060] In this embodiment, in order to improve the processing and marking efficiency of the corresponding steel bars 2, multiple systems are set up in parallel on the base 1 to realize the synchronous spraying and transmission of multiple steel bars 2.

[0061] By setting up multiple systems, the entire system can transport multiple steel bars simultaneously, which greatly improves the transmission efficiency of the steel bars. At the same time, it can not only simultaneously spray and mark the same spraying point, improving the marking efficiency of steel bars with the same type of bend, but also simultaneously spray and mark steel bars at different spraying points, improving the marking efficiency of steel bars with different types of bends. In this way, the bend types provided by the entire device can be adjusted according to actual needs.

[0062] Example 2:

[0063] Compared with Embodiment 1, the difference in this embodiment is that: the spraying module includes a laser rust remover, which is mounted on a support frame and the corresponding laser rust remover is aligned with the reinforcing bar on the first drive shaft; the controller is electrically connected to the laser rust remover; the controller is used to control the laser rust remover to remove rust from the reinforcing bar on the first rotating shaft, and if it is at the corresponding spraying point, the laser rust remover is turned off.

[0064] In this embodiment, during the rotation and movement of the reinforcing bar on the first rotating shaft, the controller will activate the laser rust remover to remove rust from the reinforcing bar on the first rotating shaft before it reaches the spraying point. When the corresponding spraying point reaches the first rotating shaft, the controller will turn off the laser rust remover and will not remove rust from the spraying point.

[0065] In this solution, laser rust remover enhances the rust removal effect while leaving the corresponding spraying points untouched. This allows operators to easily identify the bends in the rebar. The high efficiency and powerful rust removal capabilities of the laser rust remover create a significant contrast between the removed and untouched areas. This method of marking rebar bends quickly and conveniently eliminates the need for additional pigments, significantly reducing equipment costs. Since this solution directly distinguishes bends by utilizing the rebar's natural color, it achieves both excellent marking and rust removal results.

[0066] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A tunnel secondary lining reinforcement transmission system, characterized in that: include: The main drive module is used to rotate and transmit the reinforcing bar forward. The main drive module includes a left rotating wheel, a right rotating wheel, and a first motor that controls the rotation of the left and right rotating wheels. The motor shafts of the two first motors are fixedly connected to the left and right rotating wheels, respectively. The left rotating wheel tilts backward and rotates clockwise, and the right rotating wheel tilts forward and rotates counterclockwise. The gap between the left and right rotating wheels is the insertion end of the reinforcing bar. The secondary transmission module is used to receive the steel bars transmitted from the main transmission module and rotate them forward for transmission. The secondary transmission module includes left and right support frames, and a first rotating shaft with a horizontal and vertical direction to the steel bar transmission direction is fixedly connected between the two support frames. The support frames are fixed on the base. The spraying module is used to spray the steel bars on the secondary transmission module. The control module is used to obtain the bending distances of the steel bars that need to be bent from the BIM system; when the secondary transmission module receives the steel bars, it measures the steel bar movement distance in the secondary transmission module in real time, identifies the position of the steel bar where the movement distance is equal to the corresponding bending distance, and obtains the spraying point. The control module includes a controller, a communication module, a Hall sensor, a pressure sensor, and a magnet; The controller is electrically connected to the communication module, the Hall sensor, and the pressure sensor respectively; a mounting groove is provided on one end of the first rotating shaft, and the magnet is placed in the mounting groove; the Hall sensor is placed on one side of the mounting groove and fixed to the base; The pressure sensor is located at the contact point between the support frame and the first rotating shaft; The controller is used to obtain the bending distances of the steel bars that need to be bent from the BIM system through the communication module; the controller is used to detect whether the steel bars are received by the secondary transmission module through the pressure sensor; when the controller detects that the steel bars are received by the secondary transmission module, it uses Hall sensors and magnets to monitor the number of rotations of the steel bars on the first rotation axis in real time, calculates the steel bar movement distance in the secondary transmission module based on the pre-stored circumference of the first rotation axis, and identifies the position of the steel bar where the movement distance is equal to the corresponding bending distance, thus obtaining the spraying point. The spraying module includes a laser rust remover, which is mounted on a support frame and aligned with the steel bars on the first rotating shaft. The controller is electrically connected to the laser rust remover. The controller is used to control the laser rust remover to remove rust from the steel bars on the first rotating shaft. If the rust is at the corresponding spraying point, the laser rust remover is turned off and no rust is removed from the spraying point.

2. The tunnel secondary lining reinforcement transmission system according to claim 1, characterized in that: It also includes a transmission module, which comprises multiple transmission sub-modules, each including a support base, a support rod, a first rotating rod, and a second motor. Two support rods are provided, and the two support rods are respectively fixed on the upper end surface of the support base. The first rotating rod is disposed between the two support rods, passing through the corresponding support rods, and one end of the first rotating rod is fixedly connected to the motor shaft of the second motor.

3. The tunnel secondary lining reinforcement transmission system according to claim 2, characterized in that: The first rotating rod is located in the middle of the support rod.

4. The tunnel secondary lining reinforcement transmission system according to claim 3, characterized in that: A limiting ring is provided on the support rod, the height of which is higher than the height of the first rotating rod. A steel sleeve is fitted on the support rod, and the outer diameter of the limiting ring is larger than the inner diameter of the steel sleeve.

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