A device for detecting loose internal bolts of a communication tower

Abstract

The present invention relates to the technical field of bolt loosening detection, and in particular to a device for detecting loose internal bolts for a communication tower, comprising a fixed ring, a rotating ring, a guide frame, and a slider, etc. The bottom of the fixed ring is rotatably connected to the rotating ring, the bottom of the rotating ring is connected to the guide frame, and the slider is slidably connected to the guide frame. The present invention can scan the position of each bolt through a laser ranging sensor. If a bolt is found to have sunk due to loosening, the laser ranging sensor will detect an abnormal distance value. The output shaft of the servo motor can drive the inner hexagonal sleeve to rotate, and the inner hexagonal sleeve drives the nut to rotate to tighten the loose bolt. When the bolt is found to be loose, the loose bolt is automatically tightened, reducing manual intervention and saving maintenance costs. The loose bolt can be tightened in time to ensure the stability of the communication tower and avoid safety accidents. All bolts can be detected by a laser ranging sensor, which can reduce costs.

Description

Technical Field

[0001] The present invention relates to the technical field of bolt loosening detection, and in particular to an internal bolt loosening detection device for a communication tower. Background Art

[0002] In the structural design and engineering application of communication towers, the connection between the various sections of the communication tower is a key link to ensure the stability and safety of the overall structure. The traditional connection method usually uses a circle of high-strength bolts for fixing, and multiple bolts are used to tightly connect adjacent communication tower sections together to form a continuous and strong overall structure.

[0003] The bolt connection method has a high load-bearing capacity and good fatigue resistance, and the bolts are easy to disassemble, which facilitates maintenance and replacement of damaged parts. When a single-section communication tower is damaged or needs to be replaced, it only needs to loosen the corresponding bolts for disassembly and repair, which greatly improves the efficiency and flexibility of on-site operations. In addition, during the on-site assembly process, since bolt connections do not require complex welding equipment and processes, they are simpler and more efficient than other connection methods such as welding. Especially in high-altitude working environments, its construction convenience and safety advantages are more prominent.

[0004] Communication towers are installed outdoors and need to cope with complex environments. External factors (such as wind load, vibration, temperature changes, etc.) have a great impact on the connection parts of the communication towers. The bolts inside the communication towers are prone to loosening, affecting the integrity and reliability of the communication towers. At present, some technologies in the industry have attempted to monitor the loosening of bolts through sensors (such as laser ranging sensors). However, this monitoring method is limited to the detection stage, that is, after the loose bolts are found, they can only send an alarm signal, and cannot achieve autonomous repair or real-time intervention. Tightening operations must rely on manual intervention, which increases maintenance costs and there is a risk of structural instability due to response delays, or even safety accidents. Secondly, a sensor can only monitor the status of a single bolt, resulting in high system deployment costs. Summary of the Invention

[0005] In view of this, the present invention provides an internal bolt loosening detection device for communication towers, which can overcome the problem that after detecting that the bolt is loose, it can only send an alarm signal, cannot achieve autonomous repair or real-time intervention, and must rely on manual intervention for tightening operations. Manual operation will increase maintenance costs, and there is a risk of structural instability due to response delays, and even safety accidents. One sensor can only monitor the status of a single bolt, resulting in high system deployment costs.

[0006] The technical solution is: a device for detecting loose internal bolts for a communication tower, comprising a fixed ring, a rotating ring, a guide frame, a slider, a screw motor, a servo motor, a torque sensor, a hexagonal rod, a hexagonal block, a laser ranging sensor, a controller, a tightening mechanism, a rotating mechanism and a lifting mechanism. The bottom of the fixed ring is rotatably connected to the rotating ring, the bottom of the rotating ring is connected to the guide frame, the guide frame is slidably connected to the slider, the guide frame is equipped with a screw motor, the screw motor and the slider are connected by threads, the slider is equipped with a servo motor, and the output shaft of the servo motor is connected to the A torque sensor is installed, a hexagonal rod is connected to the bottom of the torque sensor, a hexagonal block is connected to the lower end of the hexagonal rod, a laser ranging sensor is installed at the bottom of the hexagonal block, a controller is installed on the slider, the screw motor, servo motor, torque sensor and laser ranging sensor are all electrically connected to the controller, the tightening mechanism is used to tighten the loose bolts inside the communication tower, the rotating mechanism is used to drive the laser ranging sensor to rotate, and rotate the laser ranging sensor to just above the bolts inside the communication tower, and the lifting mechanism is used to lift and press the loose bolts.

[0007] As a further preferred solution, the tightening mechanism includes an inner hexagonal sleeve and a spring 1, the inner hexagonal sleeve is slidably connected to the hexagonal rod, the hexagonal block is located in the inner hexagonal sleeve, the hexagonal rod is connected to a spring 1, and the spring 1 is connected to the inner hexagonal sleeve.

[0008] As a further preferred solution, the rotating mechanism includes an inner ring gear, a stepper motor and a gear. The inner ring gear is connected to the rotating ring, the stepper motor is installed on the top of the fixed ring, and the output shaft of the stepper motor is connected to a gear, and the gear and the inner ring gear are meshed.

[0009] As a further preferred solution, the lifting mechanism includes a moving block, a top block, a rubber pad and a transmission assembly. The moving block is slidably connected to the guide frame, the top block is connected to the top of the moving block, and the top block is connected to the rubber pad. The slider moves downward and drives the moving block upward through the transmission assembly. The moving block drives the top block to move upward, and the top block pushes the loosened bolt upward to lift and press the loosened bolt.

[0010] As a further preferred solution, the transmission assembly includes a mounting block, a disc, a contact block, a push rod and a connecting rod. The guide frame is connected to the mounting block, the screw of the screw motor is rotatably connected to the mounting block, the mounting block is rotatably connected to the disc, the disc is connected to the contact block, the eccentric position of the disc is hinged with a connecting rod, the lower end of the connecting rod is hinged to the top of the moving block, and the slider is connected to a push rod. The push rod will contact the contact block during the downward movement and push the contact block to cause the contact block to rotate. The contact block drives the disc to rotate, and the disc drives the moving block to move upward through the connecting rod, and the moving block drives the top block to move upward.

[0011] As a further preferred solution, it also includes a limiting mechanism, which includes a fixed block, a sliding rod, a connecting block, a second spring, a limiting block and a pushing block. The guide frame is connected to the fixed block, the sliding rod is slidably connected to the fixed block, the sliding rod is connected to the connecting block, and a second spring is connected between the movable block and the fixed block. The front and rear sides of the connecting block are connected to the limiting blocks, and the top of the movable block is connected to the pushing block. The pushing block will contact the connecting block during the upward movement and push the connecting block to move to the right. The connecting block drives the limiting block to move to the right, and the limiting block will contact the hexagonal block at the lower end of the screw and correct the position of the screw, while limiting the screw.

[0012] As a further preferred solution, a color-marking block is further included, and the connecting block is connected to a color-marking block for marking loose bolts.

[0013] As a further preferred solution, a spring three is also included, and the spring three is connected between the movable block and the fixed block.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The present invention can scan the position of each bolt through a laser ranging sensor. If a bolt is found to have sunk due to loosening, the laser ranging sensor will detect the abnormal distance value. The output shaft of the servo motor can drive the inner hexagonal sleeve to rotate, and the inner hexagonal sleeve drives the nut to rotate to tighten the loose bolt. When the bolt is found to be loose, the loose bolt is automatically tightened, reducing manual intervention and saving maintenance costs. In addition, the loose bolt can be tightened in time to ensure the stability of the communication tower and avoid safety accidents. All bolts can be detected by a laser ranging sensor, which can reduce costs.

[0016] 2. The slider can drive the moving block to move upward, and the moving block drives the top block to move upward. The top block pushes the loose bolts upward, lifts and presses the loose bolts, and puts the loose bolts in a tightened position, which is convenient for turning the nuts downward to tighten them.

[0017] 3. The moving block can drive the limit block to move to the right. The limit block will contact the hexagonal block at the lower end of the screw and correct the position of the screw. At the same time, the limit block can limit the screw to prevent the screw from rotating with the nut, ensuring that the loose bolt can be completely tightened. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the slider, screw motor, servo motor, hexagonal rod, hexagonal block and controller of the present invention.

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the servo motor, torque sensor, hexagonal block and laser ranging sensor of the present invention.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the tightening mechanism of the present invention.

[0022] Figure 5 It is a cross-sectional view of the inner hexagonal sleeve of the present invention.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the rotating mechanism of the present invention.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the lifting mechanism of the present invention.

[0025] Figure 8 This is a diagram showing the state where the fixing ring of the present invention is installed inside a communication tower.

[0026] Figure 9 It is a schematic diagram of the three-dimensional structure of the limiting mechanism of the present invention.

[0027] Figure 10 It is a cross-sectional view of the fixing block of the present invention.

[0028] The numbers in the figure are: 1. Fixed ring, 2. Rotating ring, 3. Guide frame, 4. Slider, 5. Screw motor, 6. Servo motor, 7. Torque sensor, 8. Hexagonal rod, 9. Hexagonal block, 10. Laser ranging sensor, 11. Controller, 121. Inner hexagonal sleeve, 122. Spring one, 131. Inner ring gear, 132. Stepper motor, 133. Gear, 141. Moving block, 142. Top block, 143. Rubber pad, 144. Mounting block, 145. Disc, 146. Contact block, 147. Push rod, 148. Connecting rod, 151. Fixed block, 152. Sliding rod, 153. Connecting block, 154. Spring two, 155. Limit block, 156. Push block, 16. Color block, 17. Spring three. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0030] See also Figures 1-8A device for detecting loose internal bolts of a communication tower includes a fixed ring 1, a rotating ring 2, a guide frame 3, a slider 4, a screw motor 5, a servo motor 6, a torque sensor 7, a six-diamond rod 8, a six-diamond block 9, a laser ranging sensor 10, a controller 11, a tightening mechanism, a rotating mechanism, and a lifting mechanism. The bottom of the fixed ring 1 is rotatably connected to the rotating ring 2, the bottom of the rotating ring 2 is connected to the guide frame 3 by bolts, the upper part of the guide frame 3 is slidably connected to the slider 4, the upper part of the guide frame 3 is equipped with a screw motor 5, the screw of the screw motor 5 and the slider 4 are threadedly connected, the right side of the slider 4 is equipped with a servo motor 6 by bolts, and the output of the servo motor 6 A torque sensor 7 is installed on the output shaft, and a hexagonal rod 8 is connected to the bottom of the torque sensor 7. The lower end of the hexagonal rod 8 is connected to a hexagonal block 9. A laser ranging sensor 10 is installed at the bottom of the hexagonal block 9. A controller 11 is installed on the left side of the slider 4 through a bolt. The screw motor 5, servo motor 6, torque sensor 7 and laser ranging sensor 10 are all electrically connected to the controller 11. The tightening mechanism is used to tighten the loose bolts inside the communication tower. The rotating mechanism is used to drive the laser ranging sensor 10 to rotate and rotate the laser ranging sensor 10 to just above the bolts inside the communication tower. The lifting mechanism is used to lift and press the loose bolts.

[0031] See also Figure 4 and Figure 5 The tightening mechanism includes an inner hexagonal sleeve 121 and a spring 122. The inner hexagonal sleeve 121 is slidably connected to the hexagonal rod 8. The hexagonal block 9 is located in the inner hexagonal sleeve 121. The hexagonal rod 8 is sleeved with a spring 122. The two ends of the spring 122 are respectively connected to the hexagonal rod 8 and the inner hexagonal sleeve 121. The spring 122 is sleeved on the hexagonal rod 8 to prevent the spring 122 from bending.

[0032] See also Figure 6 The rotating mechanism includes an inner ring gear 131, a stepper motor 132 and a gear 133. The inner ring gear 131 is connected to the rotating ring 2. The stepper motor 132 is installed on the top right side of the fixed ring 1 by bolts. The output shaft of the stepper motor 132 is connected to the gear 133 by a key, and the gear 133 is meshed with the inner ring gear 131.

[0033] See also Figure 7 The lifting mechanism includes a moving block 141, a top block 142, a rubber pad 143 and a transmission assembly. The lower part of the guide frame 3 is slidably connected to the moving block 141, and the top block 142 is connected to the top right of the moving block 141 by a bolt. The top of the top block 142 is connected to the rubber pad 143. The slider 4 moves downward and drives the moving block 141 to move upward through the transmission assembly. The moving block 141 drives the top block 142 to move upward. The top block 142 pushes the loose bolts upward to lift and press the loose bolts.

[0034] See also Figure 7 The transmission assembly includes a mounting block 144, a disc 145, a contact block 146, a push rod 147 and a connecting rod 148. The middle part of the guide frame 3 is connected to the mounting block 144, the screw of the screw motor 5 is rotatably connected to the mounting block 144, the left side of the mounting block 144 is rotatably connected to the disc 145, the front side of the disc 145 is connected to the contact block 146, the left eccentric position of the disc 145 is hinged with a connecting rod 148, the lower end of the connecting rod 148 is hinged to the left side of the top of the moving block 141, and the front left part of the slider 4 is connected to the push rod 147 by a bolt. The push rod 147 will contact the contact block 146 during the downward movement.

[0035] The staff installed the device inside the communication tower through the fixing ring 1, and placed the laser ranging sensor 10 directly above one of the bolts inside the communication tower. The staff then controlled the output shaft of the stepper motor 132 to rotate intermittently, driving the gear 133 to rotate intermittently, the gear 133 to drive the inner ring 131 to rotate intermittently, the inner ring 131 to drive the rotating ring 2 to rotate intermittently, the rotating ring 2 to drive the guide frame 3 to rotate intermittently, and the guide frame 3 to drive the laser ranging sensor 10 to rotate intermittently. The distance between adjacent bolts is consistent, so the laser ranging sensor 10 can be rotated to directly above each bolt. The laser ranging sensor 10 will scan the position of each bolt and use laser ranging technology to measure the distance change at the top of the bolt. All bolts can be detected by a laser ranging sensor 10, which can reduce costs. If a bolt is found to sink due to loosening, the laser ranging sensor 10 will detect an abnormal distance value, and the laser ranging sensor 10 will send a signal to the controller 11. The controller 11 will control the screw motor 5 to work, and the screw motor 5 drives the slider 4 to move downward, and the slider 4 drives the push rod 147 to move downward. The push rod 147 will contact the contact block 146 during the downward movement and push the contact block 146 to rotate the contact block 146. The contact block 146 drives the disk 145 to rotate, and the disk 145 drives the moving block 141 to move upward through the connecting rod 148. The moving block 141 drives the top block 142 to move upward, and the top block 142 pushes upward The loose bolts can be lifted and pressed to put the loose bolts in a tightened state, making it easier to turn the nuts downward to tighten them. The rubber pad 143 contacts the loose bolts to prevent the top block 142 from squeezing the loose bolts. The downward movement of the slider 4 can also drive the servo motor 6 to move downward. The servo motor 6 drives the hexagonal rod 8 and the inner hexagonal sleeve 121 to move downward. If the inner hexagonal sleeve 121 and the nut are completely aligned, the inner hexagonal sleeve 121 will be sleeved onto the nut. If the inner hexagonal sleeve 121 and the nut are not completely aligned, the inner hexagonal sleeve 121 will contact the top of the nut, and the inner hexagonal sleeve 121 will stop moving downward. The hexagonal rod 8 continues to move downward, and the spring 122 will be compressed to prevent the inner hexagonal sleeve 121 from being squeezed. 1 causes extrusion on the nut, and then the controller 11 controls the servo motor 6 to work, and the output shaft of the servo motor 6 drives the torque sensor 7 to rotate, and the torque sensor 7 drives the hexagonal rod 8 and the hexagonal block 9 to rotate, and the hexagonal rod 8 and the hexagonal block 9 drive the inner hexagonal sleeve 121 to rotate. If the inner hexagonal sleeve 121 has been sleeved on the nut at this time, the inner hexagonal sleeve 121 will drive the nut to rotate and tighten the loose bolt. If the inner hexagonal sleeve 121 is not sleeved on the nut at this time, the inner hexagonal sleeve 121 will completely correspond to the nut during the rotation process. Under the action of spring 122, the inner hexagonal sleeve 121 moves downward to sleeve on the nut, and drives the nut to rotate to tighten the loose bolt. When the bolt is found to be loose, the loose bolt will be automatically tightened.This reduces manual intervention, saves maintenance costs, and allows for timely tightening of loose bolts, ensuring the stability of the communication tower and preventing safety accidents. When loose bolts are tightened, the torque increase rate of the output shaft of the servo motor 6 suddenly slows down. The torque sensor 7 sends a signal to the controller 11, which controls the servo motor 6 to shut down. The controller 11 then controls the lead screw motor 5 to operate, driving the slider 4 upward. The slider 4 drives the hexagonal rod 8 and the inner hexagonal sleeve 121 upward and reset, disengaging the inner hexagonal sleeve 121 from the nut.

[0036] See also Figure 9 and Figure 10 , also includes a limiting mechanism, the limiting mechanism includes a fixed block 151, a slide rod 152, a connecting block 153, a spring 154, a limiting block 155 and a push block 156, the lower part of the guide frame 3 is connected to the fixed block 151, the front and rear sides of the right side of the fixed block 151 are slidably connected to the slide rod 152, the right ends of the two slide rods 152 are commonly connected to the connecting block 153, the connecting block 153 is guided by the two slide rods 152, which can prevent the connecting block 153 from tilting, and the slide rod 152 is provided with a spring 154, the spring 154 is provided. The two ends of 4 are connected to the moving block 141 and the fixed block 151 respectively. The second spring 154 is sleeved on the slide rod 152 to prevent the second spring 154 from bending. The front and rear sides of the right side of the connecting block 153 are connected to the limiting blocks 155. The side where the two limiting blocks 155 are close to each other is chamfered to facilitate the alignment of the screw. The middle of the top of the moving block 141 is connected to a push block 156 by a bolt. The top of the push block 156 is an inclined surface. When the push block 156 moves upward, the inclined surface of the top of the push block 156 will contact the connecting block 153.

[0037] When the moving block 141 moves upward, it will drive the pushing block 156 to move upward. During the upward movement of the pushing block 156, the inclined surface of the top of the pushing block 156 will contact the connecting block 153 and push the connecting block 153 to move to the right. The spring 2 154 is stretched, and the connecting block 153 drives the limiting block 155 to move to the right. The limiting block 155 will contact the hexagonal block at the lower end of the screw. The limiting block 155 adjusts the two side surfaces of the hexagonal block at the lower end of the screw so that the two side surfaces of the hexagonal block at the lower end of the screw fit with the limiting block 155 to correct the position of the screw. At the same time, the limiting block 155 can limit the screw to prevent the screw from rotating with the nut, ensuring that the loose bolt can be completely tightened.

[0038] See also Figure 10, also includes a color-coded block 16. The middle part of the right side of the connecting block 153 is connected to the color-coded block 16. When the limit block 155 moves to the right and contacts the hexagonal block at the lower end of the screw, the color-coded block 16 will also contact the hexagonal block at the lower end of the screw, stamping the hexagonal block at the lower end of the screw to mark the loose bolts. The colors marked are easy for staff to see, providing intuitive visual identification, and facilitating subsequent maintenance and troubleshooting.

[0039] See also Figure 9 , also includes a spring three 17, the front and rear sides of the lower part of the guide frame 3 are both provided with a spring three 17, the two ends of the spring three 17 are respectively connected to the moving block 141 and the fixed block 151, the spring three 17 is sleeved on the guide frame 3, which can prevent the spring three 17 from bending. When the moving block 141 moves upward, the spring three 17 will be compressed. The compressed spring three 17 can provide a downward thrust for the moving block 141, so that the moving block 141 moves downward more smoothly, avoiding the occurrence of jamming.

[0040] The above description is merely an example of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention are intended to be included within the scope of protection of the present invention. Any content not elaborated in detail herein is already known to those skilled in the art.

Claims

1. A device for detecting loose internal bolts of a communication tower, comprising a fixing ring (1), characterized in that: The invention also includes a rotating ring (2), a guide frame (3), a slider (4), a screw motor (5), a servo motor (6), a torque sensor (7), a six-diamond rod (8), a six-diamond block (9), a laser distance sensor (10), a controller (11), a tightening mechanism, a rotating mechanism and a lifting mechanism. The bottom of the fixed ring (1) is rotatably connected to the rotating ring (2), the bottom of the rotating ring (2) is connected to the guide frame (3), the slider (4) is slidably connected to the guide frame (3), the screw motor (5) is installed on the guide frame (3), the screw of the screw motor (5) and the slider (4) are connected by threads, the slider (4) is installed on the servo motor (6), the servo motor ( A torque sensor (7) is installed on the output shaft of the communication tower (6), a hexagonal rod (8) is connected to the bottom of the torque sensor (7), a hexagonal block (9) is connected to the lower end of the hexagonal rod (8), a laser distance sensor (10) is installed on the bottom of the hexagonal block (9), a controller (11) is installed on the slider (4), the screw motor (5), the servo motor (6), the torque sensor (7) and the laser distance sensor (10) are all electrically connected to the controller (11), the tightening mechanism is used to tighten the loose bolts inside the communication tower, and the rotating mechanism is used to drive the laser distance sensor (10) to rotate, and the laser distance sensor (10) is rotated to the screw inside the communication tower. Just above the bolt, the lifting mechanism is used to lift and press the loose bolt; the tightening mechanism includes an inner six-diamond sleeve (121) and a spring (122); the inner six-diamond sleeve (121) is slidably connected to the six-diamond rod (8); the six-diamond block (9) is located in the inner six-diamond sleeve (121); the six-diamond rod (8) is connected to the spring (122); the spring (122) and the inner six-diamond sleeve (121) are connected; the rotating mechanism includes an inner gear ring (131), a stepper motor (132) and a gear (133); the rotating ring (2) is connected to the inner gear ring (131); the stepper motor (132) is installed on the top of the fixed ring (1); the stepper motor (133) 2) is connected to the output shaft of the gear (133), and the gear (133) is meshed with the inner gear ring (131); the lifting mechanism includes a moving block (141), a top block (142), a rubber pad (143) and a transmission assembly, the guide frame (3) is slidably connected to the moving block (141), the top of the moving block (141) is connected to the top block (142), and the top of the top block (142) is connected to the rubber pad (143), the slider (4) moves downward and drives the moving block (141) to move upward through the transmission assembly, the moving block (141) drives the top block (142) to move upward, and the top block (142) pushes the loose bolt upward to lift and press the loose bolt;The transmission assembly includes a mounting block (144), a disc (145), a contact block (146), a push rod (147) and a connecting rod (148). The guide frame (3) is connected to the mounting block (144). The screw of the screw motor (5) is rotatably connected to the mounting block (144). The mounting block (144) is rotatably connected to the disc (145). The disc (145) is connected to the contact block (146). The eccentric position of the disc (145) is hinged with a connecting rod (148). The connecting rod (148) ) The lower end is hingedly connected to the top of the moving block (141), and the slider (4) is connected to a push rod (147). The push rod (147) contacts the contact block (146) during the downward movement and pushes the contact block (146), causing the contact block (146) to rotate. The contact block (146) drives the disc (145) to rotate. The disc (145) drives the moving block (141) to move upward through the connecting rod (148), and the moving block (141) drives the top block (142) to move upward.

2. The device for detecting loose internal bolts for a communication tower according to claim 1, wherein: The guide frame (3) further comprises a limiting mechanism, wherein the limiting mechanism comprises a fixed block (151), a slide rod (152), a connecting block (153), a second spring (154), a limiting block (155) and a push block (156). The guide frame (3) is connected to the fixed block (151), the fixed block (151) is slidably connected to the slide rod (152), the slide rod (152) is connected to the connecting block (153), and the second spring (154) is connected between the movable block (141) and the fixed block (151). 4), the front and rear sides of the connecting block (153) are connected to the limiting block (155), and the top of the moving block (141) is connected to the push block (156). The push block (156) contacts the connecting block (153) during the upward movement and pushes the connecting block (153) to move to the right. The connecting block (153) drives the limiting block (155) to move to the right. The limiting block (155) contacts the hexagonal block at the lower end of the screw and corrects the position of the screw. At the same time, the screw is limited.

3. The device for detecting loose internal bolts of a communication tower as claimed in claim 2, wherein: It also includes a color block (16), and the connecting block (153) is connected to the color block (16) for marking the loose bolts.

4. The device for detecting loose internal bolts of a communication tower as claimed in claim 3, wherein: It also includes a spring three (17), and the spring three (17) is connected between the moving block (141) and the fixed block (151).

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