An engineering structure vibration testing device

Abstract

This invention discloses an engineering structure vibration testing device, specifically relating to the field of vibration testing technology. It includes a guide frame, a bidirectional screw, an adjusting motor, and a counterweight vibration spacing adjustment mechanism. The counterweight vibration spacing adjustment mechanism comprises two threaded sleeves, a concave insert, a locking electric cylinder, an engineering structural component, a sensing block, and a distance sensor. It also includes a horizontal counterweight vibration angle adjustment mechanism and a vertical counterweight vibration angle adjustment mechanism installed at the bottom of the guide frame. This invention, through its counterweight vibration spacing adjustment mechanism, allows two test counterweight blocks to perform counterweight vibration tests at specified intervals, specified horizontal angles, and specified vertical angles. It is applicable to counterweight vibration tests at different spacing positions, thus broadening the scope of vibration testing and solving the problem of limited applicability to counterweight vibration tests at different positions.

Description

Technical Field

[0001] This invention belongs to the field of vibration testing technology, and specifically relates to a vibration testing device for engineering structures. Background Technology

[0002] The main uses of vibration testing equipment for engineering structures include assessing structural strength and stability. This equipment can simulate the vibration environments that engineering structures may encounter in actual use, including vibrations caused by external loads. Through vibration testing, the strength and stability of the structure under vibration can be evaluated, ensuring that the structure remains safe and reliable during long-term use.

[0003] Among the published documents, Chinese Patent Publication No. CN202522387U discloses a vibration testing device for a local structure of a ship or marine engineering project. The natural frequency of this vibration testing device is outside the test frequency range of the vibration test. The vibration testing method includes placing several vibration testing devices as described above on a roughly horizontal test surface of the local structure of the ship or marine engineering project to be tested. This technology can greatly improve the installation efficiency of accelerometers and can quickly, reliably, and conveniently realize vibration testing of local structures. However, this vibration testing device still has the following problems in use:

[0004] While vibration testing devices can provide vibration force tests to engineering structures and check for loosening or breakage issues, in actual use, these devices require counterweights at two additional locations. The spacing between these counterweights during vibration testing is difficult to adjust precisely according to actual needs, as are the lateral and vertical angles of the vibration at each location. This results in poor adjustability of the counterweight vibration test, making it unsuitable for vibration tests at different locations and significantly limiting its applicability. Therefore, a new vibration testing device for engineering structures is needed. Summary of the Invention

[0005] To address the aforementioned problems, this invention discloses an engineering structure vibration testing device. Through a counterweight vibration spacing adjustment mechanism, it can be applied to counterweight vibration tests at different spacing positions, thus offering the advantage of a wider range of vibration test applications. This solves the problem of difficulty in applying counterweight vibration tests to different positions and the significant limitations of the test.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A vibration testing device for engineering structures includes a guide frame, a bidirectional screw, and an adjusting motor. The bidirectional screw is rotatably connected to the inner wall of the guide frame, and the adjusting motor is fixedly installed at one end of the guide frame. The adjusting motor drives the bidirectional screw to rotate. The outer wall of the bidirectional screw is provided with a counterweight vibration spacing adjustment mechanism. The counterweight vibration spacing adjustment mechanism includes two threaded sleeves threaded onto the outer wall of the bidirectional screw. The two threads on the outer wall of the bidirectional screw are opposite and symmetrical. A concave insert is fixedly connected to the bottom end of each threaded sleeve. A locking electric cylinder is fixedly installed on both sides of the concave insert. An engineering structural component is inserted into the concave insert, and the outer wall of the output end of the locking electric cylinder is slidably connected to the concave insert. A sensing block is fixedly installed at the top end of each threaded sleeve. A distance sensor is provided on one side of the sensing block, and the distance sensor is fixedly connected to another threaded sleeve. A transverse counterweight vibration angle adjustment mechanism is installed at the bottom end of the guide frame.

[0008] Preferably, both threaded sleeves are slidably connected to the guide frame, and the output end of the adjusting motor is fixedly connected to the bidirectional screw. A limiting slide is fixedly installed at the top of the guide frame, and a sleeve frame is slidably connected to the outer wall of the limiting slide. The cross-sectional area of ​​the top of the limiting slide is larger than the cross-sectional area of ​​its bottom end. A sleeve platform is fixedly installed at the bottom of the sleeve frame. The sleeve platform is fixedly connected to the engineering structural component by bolts, and two guide rods are slidably connected to the inner wall of the sleeve platform. A vibration spring is slidably connected to the outer wall of each guide rod, and a vibration motor is provided between the two vibration springs. The vibration motor is fixedly connected to the sleeve platform. A fixed plate is installed at the bottom of each guide rod, and both guide rods are fixedly connected to the fixed plate. The sleeve platform and the fixed plate are both fixedly connected to the vibration springs. A bracket is fixedly installed on one side of the outer wall of the fixed plate, and a controller is fixedly installed at the top of the bracket.

[0009] In use, this technical solution involves adjusting the motor to drive a bidirectional screw to rotate, increasing the distance between the two threaded sleeves. The threaded sleeves move one concave insert to the left along the outer wall of the engineering structure, while the other concave insert moves to the right. Simultaneously, the threaded sleeves move the sensing block to the left, and the other threaded sleeve moves the distance sensor to the right. When the distance value sensed by the distance sensor matches the distance value set by the controller, the adjusting motor is shut off. The two concave inserts can be adjusted at a specified interval. The concave inserts move the threaded sleeves downwards, the bidirectional screw moves the guide frame downwards, and the limiting slide moves downwards along the inner wall of the sleeve frame, ensuring that the top edges of the inner walls of both concave inserts contact the top of the engineering structure. The output end of the locking electric cylinder presses against the engineering structure along the inner wall of the concave inserts, thus fixing the two concave inserts at the test position on the engineering structure.

[0010] Preferably, the transverse counterweight vibration angle adjustment mechanism includes a sleeve plate fixedly installed at the bottom end of the guide frame; a sliding frame is fixedly connected to one side of the sleeve plate, and a transmission screw is rotatably connected to the inner wall of the sliding frame; a transmission motor is fixedly installed on one side of the inner wall of the sliding frame, and the transmission motor is used to drive the transmission screw to rotate; a sleeve block is threadedly connected to the outer wall of the transmission screw, and the sleeve block is slidably connected to the sliding frame; a transmission rack is fixedly connected to the bottom end of the sleeve block; a transverse gear ring is meshed and driven to the inner wall of the transmission rack; a sleeve groove ring is rotatably connected to the inner wall of the sleeve plate, and the sleeve groove ring is fixedly connected to the transverse gear ring; a rotating shaft is fixedly connected to the inner wall of the sleeve groove ring, and a guide strip is fixedly connected to the outer wall of the rotating shaft, and the guide strip is fixedly connected to the sleeve groove ring.

[0011] Each concave insert has a fixedly connected sleeve shaft block on one side. A rotating groove ring is rotatably connected to the inner wall of the sleeve shaft block. The rotating shaft and guide strip are slidably connected to the rotating groove ring. A rotating block is provided on one side of the sleeve shaft block, and the rotating block is fixedly connected to the rotating groove ring. Sensing shafts are fixedly connected to both ends of the rotating shaft. A sleeve strip is rotatably connected to the outer wall of each sensing shaft. A balance block is installed at the top of the sleeve strip. The guide frame and the sleeve strip are fixedly connected to the balance block. The adjusting motor is fixedly connected to another sleeve strip. A lateral angle sensor is fixedly installed at one end of one of the sensing shafts, and the lateral angle sensor is fixedly connected to the sleeve strip. A vertical counterweight vibration angle adjustment mechanism is provided on the upper surface of the rotating block. The output end of the transmission motor is fixedly connected to the transmission screw, and the vertical cross-section of the transmission rack is concave. The vertical cross-section of the guide strip is rectangular, and a gap is provided between the guide strip and the inner wall of the concave insert. The center point of the rotating shaft and the center point of the sensing shaft are on the same horizontal line, and the two sensing shafts are symmetrically arranged about the rotating shaft.

[0012] In operation, this technical solution involves a drive motor rotating a drive screw, causing the sleeve block to move forward along the inner wall of the sliding frame. A drive rack drives a transverse gear ring to rotate counter-clockwise, which in turn drives a sleeve groove ring to rotate counter-clockwise. A guide bar drives two rotating groove rings to rotate counter-clockwise. The two rotating groove rings rotate counter-clockwise on the inner walls of the two sleeve shaft blocks, causing the rotating block to rotate counter-clockwise. The rotating rod causes the sleeve rotating block to rotate counter-clockwise. This rotation of the shaft drives the two sensing shafts to rotate synchronously. When the angle value sensed by the transverse angle sensor matches the angle value set by the controller, the drive motor is shut off via the controller.

[0013] Preferably, the vertical counterweight vibration angle adjustment mechanism includes a concave sleeve fixedly mounted on the upper surface of the rotating block; a rotating rod is rotatably connected to the inner wall of the concave sleeve, a sleeved rotating block is fixedly connected to the outer wall of the rotating rod, and a test counterweight is fixedly installed at the top of the sleeved rotating block; a vertical angle sensor is fixedly installed at one end of the rotating rod, and the vertical angle sensor is fixedly connected to the rotating block; a driven gear is provided on one side of the concave sleeve, and the driven gear is fixedly connected to the rotating rod; a linkage rack is meshed and driven to the outer wall of the driven gear, and a threaded sleeve is fixedly connected to the lower surface of the linkage rack; a sliding frame is slidably connected to the outer wall of the threaded sleeve, and the sliding frame is fixedly connected to the rotating block; an adjusting screw is threadedly connected to the inner wall of the threaded sleeve, and a reduction motor is fixedly installed at one end of the sliding frame, the reduction motor being used to drive the adjusting screw to rotate. The threaded sleeve is slidably connected to the rotating block, and the vertical cross-section of the linkage rack is concave.

[0014] The output end of the geared motor is fixedly connected to the adjusting screw.

[0015] In operation, this technical solution involves two geared motors driving two adjusting screws to rotate. The adjusting screws, under the influence of the threaded transmission force, cause the threaded sleeve to move backward, which in turn causes the linked rack to move backward. The driven gear drives the rotating rod to rotate clockwise, which in turn drives the sleeved rotating block to rotate clockwise. When the angle value sensed by the vertical angle sensor matches the angle value set by the controller, the controller shuts off the geared motors. This allows the two test counterweights to adjust their vibration angle according to a specified vertical angle.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. This invention utilizes a counterweight vibration spacing adjustment mechanism. The controller sets the distance between two concave blocks, and the adjusting motor drives a bidirectional screw to rotate. The bidirectional screw, under the action of threaded transmission, increases the distance between the two threaded sleeves. The threaded sleeves cause one concave block to move left along the outer wall of the engineering structure, while the other concave block moves right along the outer wall. When the distance value sensed by the distance sensor matches the distance value set by the controller, the controller shuts off the adjusting motor. The tops of the inner walls of both concave blocks are then fixed at the top of the engineering structure. This allows for precise adjustment of the counterweight vibration spacing between the two test counterweights according to actual needs, resulting in better precision and adjustability of the counterweight vibration test. It is applicable to counterweight vibration tests at different spacing positions, thus broadening the scope of vibration testing.

[0018] 2. This invention employs a transverse counterweight vibration angle adjustment mechanism. A drive motor drives a drive screw to rotate, which in turn drives a sleeve block to move forward under the action of threaded transmission. A drive rack drives a transverse gear ring to rotate counterclockwise, which in turn drives a sleeve groove ring to rotate counterclockwise. A guide bar drives two rotating groove rings to rotate counterclockwise, a rotating block drives a concave sleeve block to rotate counterclockwise, and the sleeve rotating block drives the test counterweight block to rotate counterclockwise. When the angle value sensed by the transverse angle sensor is the same as the angle value set by the controller, the drive motor is turned off by the controller. The two test counterweight blocks can accurately adjust the counterweight vibration angle according to the specified transverse angle, making it suitable for counterweight vibration tests with different transverse angles and thus having a wider range of applications.

[0019] 3. This invention utilizes a vertical counterweight vibration angle adjustment mechanism. Two reduction motors drive two adjusting screws to rotate. The adjusting screws cause the threaded sleeve block to move backward under the action of thread transmission force. The linkage rack drives the driven gear to rotate clockwise, which in turn drives the rotating rod to rotate clockwise. The rotating rod then drives the sleeved rotating block to rotate clockwise, which in turn drives the test counterweight block to rotate clockwise. When the angle value sensed by the vertical angle sensor is the same as the angle value set by the controller, the reduction motor is turned off by the controller. The two test counterweight blocks can adjust the counterweight vibration angle according to the specified vertical angle, making it suitable for counterweight vibration tests with different vertical angles and thus having a wider range of applications.

[0020] Based on the interaction of the above-mentioned multiple effects, firstly, the vibration spacing between the two test counterweights can be precisely adjusted according to actual needs; secondly, the vibration angle of the two test counterweights can be adjusted according to a specified vertical angle; and finally, the vibration angle of the two test counterweights can be precisely adjusted according to a specified lateral angle. In summary, the two test counterweights can conduct counterweight vibration tests at specified spacing, lateral angles, and vertical angles, resulting in better precision and adjustability of the counterweight vibration test. This makes it applicable to counterweight vibration tests at different spacing positions, thus broadening the scope of vibration testing applications. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of the engineering structure vibration testing device of the present invention.

[0022] Figure 2 This is a schematic diagram of a partial section of the engineering structural component of the present invention.

[0023] Figure 3 This is a bottom view schematic diagram of the engineering structure vibration testing device of the present invention.

[0024] Figure 4 This is a partial structural diagram showing the connection between the engineering structural component and the socket of the present invention.

[0025] Figure 5 This is a partial structural diagram of the vertical cross-section at the connection between the sliding frame and the sleeve plate of the present invention.

[0026] Figure 6 This is a partial structural diagram of the vertical cross-section at the connection between the guide bar and the rotating shaft of the present invention.

[0027] Figure 7 For the present invention Figure 2 Enlarged structural diagram at point A in the middle.

[0028] Figure 8 This is a partial structural diagram of the connection between the rotating shaft and the sensing shaft of the present invention.

[0029] Figure 9 This is a schematic diagram of the main structure of the vertical counterweight vibration angle adjustment mechanism of the present invention.

[0030] Figure 10 This is a partial structural diagram of the connection between the test counterweight and the sleeve rotating block of the present invention, viewed from below.

[0031] List of identifiers in attached diagrams:

[0032] 1. Guide frame; 2. Bidirectional screw; 3. Adjusting motor; 4. Threaded sleeve; 5. Concave insert block; 6. Locking electric cylinder; 7. Engineering structural component; 8. Sensing block; 9. Distance sensor; 10. Limiting slide bar; 11. Sleeve frame; 12. Sleeve platform; 13. Guide rod; 14. Vibration spring; 15. Vibration motor; 16. Fixed plate; 17. Bracket; 18. Controller; 19. Sleeve plate; 20. Slide frame; 21. Transmission screw; 22. Transmission motor; 23. Sleeve block; 24. Transmission rack; 25. Slotted ring; 26. Transverse gear ring; 27. Rotating shaft; 28. Guide bar; 29. ​​Slotted shaft block; 30. Rotating slotted ring; 31. Rotating block; 32. Sensing shaft; 33. Transverse angle sensor; 34. Slotted strip; 35. Balance block; 36. Concave sleeve block; 37. Rotating rod; 38. Slotted rotating block; 39. Test counterweight block; 40. Vertical angle sensor; 41. Driven gear; 42. Linkage rack; 43. Threaded sleeve block; 44. Sliding frame; 45. Adjusting screw; 46. Gear motor. Detailed Implementation

[0033] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0034] As attached Figure 1-10The illustrated engineering structure vibration testing device includes a counterweight vibration spacing adjustment mechanism, a transverse counterweight vibration angle adjustment mechanism, and a vertical counterweight vibration angle adjustment mechanism. The arrangement of each mechanism enables the two test counterweight blocks 39 to conduct counterweight vibration tests at a specified spacing, a specified transverse angle, and a specified vertical angle. This improves the precision and adjustability of the counterweight vibration test, making it applicable to counterweight vibration tests at different spacing positions and broadening the scope of vibration testing. The specific structural settings of each mechanism and component are as follows.

[0035] In this technical solution, as shown in the appendix Figure 1-2 As shown, the counterweight vibration spacing adjustment mechanism includes two threaded sleeves 4 with threads threaded on the outer wall of the bidirectional screw 2. The two threads on the outer wall of the bidirectional screw 2 are opposite and symmetrical. A concave insert 5 is fixedly connected to the bottom end of each threaded sleeve 4. A locking electric cylinder 6 is fixedly installed on both sides of the concave insert 5. An engineering structural component 7 is inserted into the inside of the concave insert 5, and the outer wall of the output end of the locking electric cylinder 6 is slidably connected to the concave insert 5. A sensing block 8 is fixedly installed at the top of the threaded sleeve 4. A distance sensor 9 is provided on one side of the sensing block 8, and the distance sensor 9 is fixedly connected to the other threaded sleeve 4. A transverse counterweight vibration angle adjustment mechanism is installed at the bottom end of the guide frame 1.

[0036] In this technical solution, as shown in the appendix Figure 1-4 As shown, a limiting slide bar 10 is fixedly installed at the top of the guide frame 1, and a sleeve frame 11 is slidably connected to the outer wall of the limiting slide bar 10. The cross-sectional area of ​​the top of the limiting slide bar 10 is larger than the cross-sectional area of ​​its bottom end; a sleeve platform 12 is fixedly installed at the bottom end of the sleeve frame 11.

[0037] The socket 12 is fixedly connected to the engineering structural component 7 by bolts, and two guide rods 13 are slidably connected to the inner wall of the socket 12. Each guide rod 13 is slidably connected to the outer wall of a vibration spring 14. A vibration motor 15 is provided between the two vibration springs 14, and the vibration motor 15 is fixedly connected to the socket 12. A fixing plate 16 is installed at the bottom of the guide rod 13, and both guide rods 13 are fixedly connected to the fixing plate 16. The socket 12 and the fixing plate 16 are both fixedly connected to the vibration springs 14. A bracket 17 is fixedly installed on one side of the outer wall of the fixed plate 16. A controller 18 is fixedly installed on the top of the bracket 17 so that the fixed plate 16 can be fixed at the installation ground position by inserting expansion bolts into the holes of the fixed plate 16. The bracket 17 supports the controller 18. The limiting slide bar 10 moves upward along the inner wall of the socket frame 11 to insert the engineering structure 7 into the socket platform 12. After installation, the vibration motor 15 is started by the controller 18. The vibration motor 15 drives the socket platform 12 to vibrate. The socket platform 12 vibrates vertically along the outer wall of the two guide rods 13. The socket platform 12 drives the two vibration springs 14 to vibrate. The socket platform 12 drives the engineering structure 7 to vibrate.

[0038] In this technical solution, as shown in the appendix Figure 5-8 As shown, the transverse counterweight vibration angle adjustment mechanism includes a sleeve plate 19 fixedly installed at the bottom of the guide frame 1; a slide frame 20 is fixedly connected to one side of the sleeve plate 19, and a transmission screw 21 is rotatably connected to the inner wall of the slide frame 20; a transmission motor 22 is fixedly installed on one side of the inner wall of the slide frame 20, and the transmission motor 22 is used to drive the transmission screw 21 to rotate; a sleeve block 23 is threadedly connected to the outer wall of the transmission screw 21, and the sleeve block 23 is slidably connected to the slide frame 20; a transmission rack 24 is fixedly connected to the bottom end of the sleeve block 23; a transverse gear ring 26 is meshed and transmitted to the inner wall of the transmission rack 24; a sleeve groove ring 25 is rotatably connected to the inner wall of the sleeve plate 19, and the sleeve groove ring 25 is fixedly connected to the transverse gear ring 26; a rotating shaft 27 is fixedly connected to the inner wall of the sleeve groove ring 25, and a guide bar 28 is fixedly connected to the outer wall of the rotating shaft 27, and the guide bar 28 is fixedly connected to the sleeve groove ring 25.

[0039] Each concave insert 5 is fixedly connected to a sleeve shaft block 29 on one side. A rotating groove ring 30 is rotatably connected to the inner wall of the sleeve shaft block 29. The rotating shaft 27 and the guide strip 28 are slidably connected to the rotating groove ring 30. A rotating block 31 is provided on one side of the sleeve shaft block 29, and the rotating block 31 is fixedly connected to the rotating groove ring 30. Sensing shafts 32 are fixedly connected to both ends of the rotating shaft 27. A sleeve strip 34 is rotatably connected to the outer wall of each sensing shaft 32.

[0040] A balance block 35 is mounted on the top of the socket 34. The guide frame 1 and the socket 34 are both fixedly connected to the balance block 35. The adjusting motor 3 is fixedly connected to another socket 34. A lateral angle sensor 33 is fixedly mounted on one end of one of the sensing shafts 32, and the lateral angle sensor 33 is fixedly connected to the socket 34. The upper surface of the rotating block 31 is provided with a vertical counterweight vibration angle adjustment mechanism. The output end of the drive motor 22 is fixedly connected to the drive screw 21, and the vertical cross-section of the drive rack 24 is concave. The vertical cross-section of the guide bar 28 is rectangular, and there is a gap between the guide bar 28 and the inner wall of the concave insert 5. The center point of the rotating shaft 27 and the center point of the sensing shaft 32 are on the same horizontal line, and the two sensing shafts 32 are symmetrically arranged about the rotating shaft 27.

[0041] In this technical solution, as shown in the appendix Figure 9-10 As shown, the vertical counterweight vibration angle adjustment mechanism includes a concave sleeve block 36 fixedly mounted on the upper surface of the rotating block 31; a rotating rod 37 is rotatably connected to the inner wall of the concave sleeve block 36, a sleeve rotating block 38 is fixedly connected to the outer wall of the rotating rod 37, and a test counterweight block 39 is fixedly installed at the top of the sleeve rotating block 38; a vertical angle sensor 40 is fixedly installed at one end of the rotating rod 37, and the vertical angle sensor 40 is fixedly connected to the rotating block 31.

[0042] A driven gear 41 is provided on one side of the concave sleeve block 36, and the driven gear 41 is fixedly connected to the rotating rod 37. A linkage rack 42 is meshed and driven on the outer wall of the driven gear 41, and a threaded sleeve block 43 is fixedly connected to the lower surface of the linkage rack 42. A sliding frame 44 is slidably connected to the outer wall of the threaded sleeve block 43, and the sliding frame 44 is fixedly connected to the rotating block 31. An adjusting screw 45 is threadedly connected to the inner wall of the threaded sleeve block 43, and a reduction motor 46 is fixedly installed at one end of the sliding frame 44. The reduction motor 46 is used to drive the adjusting screw 45 to rotate. The threaded sleeve block 43 is slidably connected to the rotating block 31, and the vertical cross-section of the linkage rack 42 is concave. The output end of the reduction motor 46 is fixedly connected to the adjusting screw 45.

[0043] The working principle of the engineering structure vibration testing device of this invention is as follows:

[0044] First, during installation, expansion bolts are inserted into the holes of the fixing plate 16 to secure it to the installation surface. The fixing plate 16 supports the bracket 17, which in turn supports the controller 18. The fixing plate 16 also supports two guide rods 13, increasing their stability. Next, the hand is moved upwards along the outer wall of the limiting slide bar 10, which moves upwards along the inner wall of the socket frame 11. Then, the engineering structure component 7 is inserted into the socket platform 12, and bolts are used to secure the engineering structure component 7 to the socket platform 12.

[0045] Secondly, when adjusting the counterweight vibration spacing, the distance value between the two concave inserts 5 is set in the controller 18. The controller 18 then starts the adjusting motor 3. Simultaneously, the balance block 35 is fixed to the guide frame 1, thus balancing the weight of the adjusting motor 3. The balance block 35 also supports the connecting strip 34. The adjusting motor 3 drives the bidirectional screw 2 to rotate. The bidirectional screw 2 drives the two threaded sleeves 4, increasing the distance between them under the force of the threaded transmission. One threaded sleeve 4 moves to the left along the inner wall of the guide frame 1, while the other threaded sleeve 4 moves to the right along the inner wall of the guide frame 1. The threaded sleeve 4 drives the concave insert 5 to move to the left along the outer wall of the engineering structure 7, and the other concave insert 5 moves to the right along the outer wall of the engineering structure 7. Simultaneously, the threaded sleeve 4 drives the sensing block 8 to move to the left, and the other threaded sleeve 4 drives the distance sensor 9 to move to the right. The distance between the distance sensor 9 and the sensing block 8 increases, allowing the distance sensor 9 to sense the distance to the sensing block 8. When the distance value sensed by the distance sensor 9 is the same as the distance value set by the controller 18, the controller 18 will turn off the regulating motor 3.

[0046] In this way, the two concave inserts 5 can be adjusted at a specified interval. Simultaneously, the limiting slide bar 10 is released, and under gravity, the two concave inserts 5 move downwards. The concave inserts 5 drive the threaded sleeve 4 downwards, which in turn drives the bidirectional screw 2 downwards. The bidirectional screw 2 drives the guide frame 1 downwards, which in turn drives the limiting slide bar 10 downwards. The limiting slide bar 10 moves downwards along the inner wall of the sleeve frame 11, so that the top edges of the inner walls of the two concave inserts 5 contact the top edge of the engineering structure component 7. At the same time, the controller 18 activates multiple locking electric cylinders 6. The output ends of the locking electric cylinders 6 press against the engineering structure component 7 along the inner walls of the concave inserts 5, thus fixing the two concave inserts 5 at the test position of the engineering structure component 7 at a specified interval. This allows for counterweight vibration adjustment of the two concave inserts 5 at the specified interval.

[0047] Meanwhile, when the vertical counterweight vibration angle is adjusted, the controller 18 starts two reduction motors 46, which drive two adjusting screws 45 to rotate respectively. The adjusting screws 45 drive the threaded sleeve block 43 to move backward under the action of thread transmission force. The threaded sleeve block 43 moves backward along the inner wall of the sliding frame 44, and the threaded sleeve block 43 causes the linkage rack 42 to move backward.

[0048] Simultaneously, the rack 42 drives the driven gear 41 to rotate clockwise, which in turn drives the rotating rod 37 to rotate clockwise. The rotating rod 37 rotates clockwise on the inner wall of the concave sleeve block 36, which in turn drives the sleeved rotating block 38 to rotate clockwise, which in turn drives the test counterweight block 39 to rotate clockwise. The vertical angle sensor 40 is supported by the rotating block 31, and the vertical angle sensor 40 senses the angle of the rotating rod 37. When the angle value sensed by the vertical angle sensor 40 is the same as the angle value set by the controller 18, the controller 18 shuts off the reduction motor 46. In this way, the two test counterweight blocks 39 can adjust the counterweight vibration angle according to the specified vertical angle.

[0049] Then, when adjusting the lateral counterweight vibration angle, the transmission motor 22 is started by the controller 18. The transmission motor 22 drives the transmission screw 21 to rotate. The transmission screw 21 drives the sleeve block 23 to move forward under the action of the threaded transmission force. The sleeve block 23 moves forward along the inner wall of the slide frame 20. The sleeve block 23 drives the transmission rack 24 to move forward. The transmission rack 24 drives the lateral gear ring 26 to rotate counterclockwise. The transmission rack 24 drives the rotating shaft 27 and the guide bar 28 to rotate counterclockwise synchronously. The lateral gear ring 26 drives the sleeve groove ring 25 to rotate counterclockwise. The sleeve groove ring 25 rotates counterclockwise along the inner wall of the sleeve plate 19. The guide bar 28 drives the two rotating groove rings 30 to rotate counterclockwise.

[0050] Two rotating groove rings 30 rotate counterclockwise on the inner walls of the two sleeve shaft blocks 29. The rotating groove rings 30 drive the rotating block 31 to rotate counterclockwise, the rotating block 31 drives the concave sleeve block 36 to rotate counterclockwise, the concave sleeve block 36 drives the rotating rod 37 to rotate counterclockwise, the rotating rod 37 causes the sleeve rotating block 38 to rotate counterclockwise, and the sleeve rotating block 38 drives the test counterweight block 39 to rotate counterclockwise. At the same time, the rotation of the shaft 27 drives the two sensing shafts 32 to rotate synchronously. The sensing shafts 32 rotate counterclockwise on the inner wall of the sleeve strip 34. The sleeve strip 34 is stably supported by the balance block 35, and the sleeve strip 34 supports the lateral angle sensor 33. The lateral angle sensor 33 senses the angle of the sensing shaft 32. When the angle value sensed by the lateral angle sensor 33 is the same as the angle value set by the controller 18, the controller 18 shuts off the drive motor 22. In this way, the two test counterweight blocks 39 can adjust the counterweight vibration angle according to the specified lateral angle.

[0051] Finally, during the vibration test, the vibration motor 15 is started by the controller 18. The vibration motor 15 drives the socket 12 to vibrate, and the socket 12 vibrates vertically along the outer wall of the two guide rods 13. At the same time, the socket 12 drives the two vibration springs 14 to vibrate, the socket 12 drives the engineering structure component 7 to vibrate, the engineering structure component 7 drives the two concave inserts 5 to vibrate, the concave inserts 5 drive the socket shaft block 29 to vibrate, the socket shaft block 29 drives the rotating groove ring 30 to vibrate, the rotating groove ring 30 drives the rotating block 31 to vibrate, the rotating block 31 drives the concave sleeve block 36 to vibrate, and the concave sleeve block 36 drives the rotating rod 37 to vibrate. At the same time, the rotating rod 37 drives the socket rotating block 38 to vibrate, and the socket rotating block 38 drives the test counterweight block 39 to vibrate. In this way, the two test counterweight blocks 39 can perform counterweight vibration tests at a specified interval, a specified lateral angle, and a specified vertical angle. After the vibration test, the vibration motor 15 is turned off by the controller 18, and the various nodes on the engineering structure component 7 are checked for any damage.

[0052] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0053] It should be noted that the above content merely illustrates the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. For those skilled in the art, various improvements and modifications can be made without departing from the principle of the present invention, and all such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A vibration testing device for an engineering structure, comprising a guide frame (1), a bidirectional screw (2), and an adjusting motor (3), wherein the bidirectional screw (2) is rotatably connected to the inner wall of the guide frame (1), and the adjusting motor (3) is fixedly installed at one end of the guide frame (1), characterized in that: The regulating motor (3) is used to drive the bidirectional screw (2) to rotate, and the outer wall of the bidirectional screw (2) is provided with a counterweight vibration spacing adjustment mechanism; The counterweight vibration spacing adjustment mechanism includes two threaded sleeves (4) with threads set on the outer wall of the bidirectional screw (2). The two threads on the outer wall of the bidirectional screw (2) are opposite and symmetrical. The bidirectional screw (2) drives the two threaded sleeves (4) to increase the distance between the two threaded sleeves (4) under the action of thread transmission force. The threaded sleeve (4) moves to the left along the inner wall of the guide frame (1), while the other threaded sleeve (4) moves to the right along the inner wall of the guide frame (1). Each of the threaded sleeves (4) has a concave insert (5) fixedly connected to its bottom end. Both sides of the concave insert (5) are fixedly installed with locking electric cylinders (6). An engineering structural component (7) is inserted into the inside of the concave insert (5), and the outer wall of the output end of the locking electric cylinder (6) is slidably connected to the concave insert (5). A sensing block (8) is fixedly installed on the top of the threaded sleeve (4), a distance sensor (9) is provided on one side of the sensing block (8), and the distance sensor (9) is fixedly connected to another threaded sleeve (4). The bottom end of the guide frame (1) is equipped with a horizontal counterweight vibration angle adjustment mechanism and a vertical counterweight vibration angle adjustment mechanism. The top of the guide frame (1) is fixedly installed with a limiting slide (10), and the outer wall of the limiting slide (10) is slidably connected with a socket frame (11). The bottom end of the socket frame (11) is fixedly installed with a socket platform (12), and the engineering structural component (7) is inserted into the socket platform (12).

2. The engineering structure vibration testing device according to claim 1, characterized in that: Both of the threaded sleeves (4) are slidably connected to the guide frame (1), and the output end of the adjusting motor (3) is fixedly connected to the bidirectional screw (2).

3. The engineering structure vibration testing device according to claim 1, characterized in that: The top cross-sectional area of ​​the limiting slider (10) is larger than the bottom cross-sectional area; The socket (12) is fixedly connected to the engineering structural component (7) by bolts, and the inner wall of the socket (12) is slidably connected to two guide rods (13). Each guide rod (13) is slidably connected to a vibration spring (14) on its outer wall. A vibration motor (15) is provided between the two vibration springs (14), and the vibration motor (15) is fixedly connected to the socket (12). The bottom end of the guide rod (13) is equipped with a fixed plate (16), and both guide rods (13) are fixedly connected to the fixed plate (16). The socket (12) and the fixed plate (16) are fixedly connected to the vibration spring (14).

4. The engineering structure vibration testing device according to claim 3, characterized in that: A bracket (17) is fixedly installed on one side of the outer wall of the fixed plate (16), and a controller (18) is fixedly installed on the top of the bracket (17).

5. The engineering structure vibration testing device according to claim 1, characterized in that: The transverse counterweight vibration angle adjustment mechanism includes a sleeve plate (19) fixedly installed at the bottom of the guide frame (1). A slide frame (20) is fixedly connected to one side of the sleeve plate (19), and a transmission screw (21) is rotatably connected to the inner wall of the slide frame (20). A transmission motor (22) is fixedly installed on one side of the inner wall of the slide frame (20), and the transmission motor (22) is used to drive the transmission screw (21) to rotate. The outer wall of the transmission screw (21) is threaded with a sleeve block (23), and the sleeve block (23) is slidably connected to the slide frame (20). The bottom end of the sleeve block (23) is fixedly connected with a transmission rack (24). The inner wall of the transmission rack (24) is meshed with a transverse toothed ring (26), and the inner wall of the sleeve plate (19) is rotatably connected with a sleeve groove ring (25). The sleeve groove ring (25) is fixedly connected to the transverse toothed ring (26). The inner wall of the sleeve groove ring (25) is fixedly connected to a rotating shaft (27), and the outer wall of the rotating shaft (27) is fixedly connected to a guide strip (28). The guide strip (28) is fixedly connected to the sleeve groove ring (25). Each of the concave inserts (5) is fixedly connected to a sleeve shaft block (29) on one side. A rotating groove ring (30) is rotatably connected to the inner wall of the sleeve shaft block (29). The rotating shaft (27) and the guide bar (28) are slidably connected to the rotating groove ring (30). A rotating block (31) is provided on one side of the sleeve shaft block (29), and the rotating block (31) is fixedly connected to the rotating groove ring (30). Both ends of the rotating shaft (27) are fixedly connected to a sensing shaft (32). The outer wall of each sensing shaft (32) is rotatably connected to a socket strip (34). A balance block (35) is installed at the top of the socket strip (34). The guide frame (1) and the socket strip (34) are fixedly connected to the balance block (35). The adjusting motor (3) is fixedly connected to another socket strip (34). A lateral angle sensor (33) is fixedly installed at one end of one of the sensing shafts (32), and the lateral angle sensor (33) is fixedly connected to the socket strip (34). The upper surface of the rotating block (31) is provided with a vertical counterweight vibration angle adjustment mechanism.

6. The engineering structure vibration testing device according to claim 5, characterized in that: The output end of the drive motor (22) is fixedly connected to the drive screw (21), and the vertical cross-section of the drive rack (24) is concave.

7. The engineering structure vibration testing device according to claim 5, characterized in that: The vertical cross-section of the guide strip (28) is rectangular, and there is a gap between the guide strip (28) and the inner wall of the concave insert (5).

8. The engineering structure vibration testing device according to claim 5, characterized in that: The center point of the rotating shaft (27) and the center point of the sensing shaft (32) are on the same horizontal line, and the two sensing shafts (32) are symmetrically arranged about the rotating shaft (27).

9. The engineering structure vibration testing device according to claim 5, characterized in that: The vertical counterweight vibration angle adjustment mechanism includes a concave sleeve (36) fixedly installed on the upper surface of the rotating block (31). The inner wall of the concave sleeve (36) is rotatably connected to a rotating rod (37), the outer wall of the rotating rod (37) is fixedly connected to a sleeve rotating block (38), and a test counterweight (39) is fixedly installed at the top of the sleeve rotating block (38). A vertical angle sensor (40) is fixedly installed at one end of the rotating rod (37), and the vertical angle sensor (40) is fixedly connected to the rotating block (31). A driven gear (41) is provided on one side of the concave sleeve block (36), and the driven gear (41) is fixedly connected to the rotating rod (37). The outer wall of the driven gear (41) is meshed with a linkage rack (42), and a threaded sleeve block (43) is fixedly connected to the lower surface of the linkage rack (42). A sliding frame (44) is slidably connected to the outer wall of the threaded sleeve block (43), and the sliding frame (44) is fixedly connected to the rotating block (31). The inner wall of the threaded sleeve (43) is threaded with an adjusting screw (45), and a geared motor (46) is fixedly installed at one end of the sliding frame (44). The geared motor (46) is used to drive the adjusting screw (45) to rotate.

10. The engineering structure vibration testing device according to claim 9, characterized in that: The threaded sleeve (43) and the rotating block (31) are slidably connected, and the vertical cross-section of the linkage rack (42) is concave. The output end of the geared motor (46) is fixedly connected to the adjusting screw (45).

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