A blasting vibration monitoring device in overhead beam dismantling

Abstract

The application discloses a blasting vibration monitoring device in high-pier dismantling, which comprises an outer protective cover, a vibration meter body, a sensor assembly, a first damping telescopic rod, a mounting frame and an inner protective shell. The outer protective cover is installed on the upper side of a base plate. One end of the first damping telescopic rod is hinged to the outer protective cover, and the other end is hinged to a bottom plate. The mounting frame is hinged to one end of a second damping telescopic rod, and the other end of the second damping telescopic rod is hinged to the base plate. The vibration meter body is installed on the upper side of the mounting frame. The measuring end of the sensor assembly extends from the base plate. The inner protective shell is connected to the inner wall of the outer protective cover. An elastic support frame is arranged between the outer protective cover and the inner protective shell. Buffering spheres are arranged between the wave trough of the elastic support frame and the outer protective cover and between the wave crest of the elastic support frame and the inner protective shell. The damping telescopic rods reduce the influence of blasting vibration on the monitor, the elastic support frame and the buffering spheres strengthen the buffering effect, and the internal monitor is effectively protected.

Description

Technical Field

[0001] This invention relates to the field of vibration monitoring technology, and in particular to a device for monitoring blasting vibrations during the demolition of elevated bridge beams. Background Technology

[0002] During the blasting demolition of elevated structures, real-time vibration monitoring of the elevated beams is necessary to provide data support for the safety of the blasting operation. The blasting process generates air shock waves and a large amount of flying debris. To prevent damage to the vibration monitoring instruments, existing blasting vibration monitoring equipment typically uses external protective covers to block impacts from flying debris and other objects. To comprehensively monitor the vibration of the elevated beams, multiple monitoring points need to be set up at various locations. Existing monitoring equipment is usually installed on flat monitoring points; however, for monitoring points on uneven surfaces or curved walls, cumbersome positioning and installation are required, resulting in low installation efficiency. Because the monitoring points are significantly affected by blasting impacts and vibrations, the vibration monitoring instruments are subjected to considerable vibration, easily causing damage and affecting data acquisition and transmission. The external protective covers are often made of metal shells, which are easily penetrated by strong impacts, failing to effectively protect the internal vibration monitoring instruments. Furthermore, to improve impact resistance, the external protective covers are often quite thick and heavy, making them inconvenient to install and remove. Summary of the Invention

[0003] The present invention aims to overcome the shortcomings of the existing technology and provide a blasting vibration monitoring device for the dismantling of elevated bridge beams, solving the problems that existing blasting vibration monitoring devices are easily damaged by blasting impacts and that vibration can affect the transmission of monitoring data.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A vibration monitoring device for blasting during the demolition of elevated beams includes an outer protective cover, a vibration meter body, a sensor assembly, a first damping telescopic rod, a mounting frame, and an inner protective shell. The outer protective cover is mounted on the upper side of a base plate. One end of the first damping telescopic rod is hinged to the outer wall of the outer protective cover, and the other end is hinged to a base plate. The mounting frame is hinged to one end of a second damping telescopic rod, and the other end of the second damping telescopic rod is hinged to the base plate. The vibration meter body is mounted on the upper side of the mounting frame. The sensor assembly is installed in a through-hole in the base plate. The measuring end of the sensor assembly extends out of the through-hole and directly contacts the elevated beam. The inner protective shell is connected to the inner wall of the outer protective cover, and a buffer space is formed between the outer protective cover and the inner protective shell. An "S"-shaped elastic support frame is provided in the buffer space, and buffer spheres are provided between the trough of the elastic support frame and the outer protective cover, and between the crest of the elastic support frame and the inner protective shell.

[0006] Furthermore, multiple elastic support frames are spaced apart around the outer wall of the inner protective shell.

[0007] Furthermore, the buffer sphere includes a connecting block, a second damping spring shock absorber, and two support blocks; the two support blocks are symmetrically arranged at both ends of the connecting block, and both ends of the connecting block are provided with grooves. The inner end of the support block slides into the groove, and the outer end of the support block extends out of the groove; the inner end face of the support block is connected to the bottom of the groove through the second damping spring shock absorber.

[0008] Furthermore, the outer ends of the two support blocks located between the trough of the elastic support frame and the outer protective cover are respectively spherically connected to the trough of the elastic support frame and the outer protective cover; the outer ends of the two support blocks located between the crest of the elastic support frame and the inner protective shell are respectively spherically connected to the crest of the elastic support frame and the inner protective shell.

[0009] Furthermore, multiple first damping telescopic rods are evenly arranged around the outer protective cover; each first damping telescopic rod includes a telescopic tube, a telescopic shaft, a piston, and a first damping spring shock absorber; the fixed end of the telescopic tube is hinged to the base plate via a pin, and the movable end of the telescopic tube is provided with a chamber; the fixed end of the telescopic shaft is hinged to the outer wall of the outer protective cover via a pin; the movable end of the telescopic shaft extends into the chamber and connects to the outer end face of the piston, the piston slides against the inner wall of the chamber, and the inner end face of the piston is connected to the bottom of the chamber via the first damping spring shock absorber.

[0010] Furthermore, the inner wall of the chamber is provided with a baffle, which abuts against the outer end face of the piston.

[0011] Furthermore, a plurality of second damping telescopic rods are evenly arranged on the lower side of the mounting bracket, and the plurality of second damping telescopic rods are centrally symmetrical.

[0012] Furthermore, the mounting bracket is equipped with a signal transmission component and a GPS locator; the outer protective cover is provided with a plurality of first vent holes, and the inner protective shell is provided with a plurality of second vent holes, with the first vent holes and the second vent holes being distributed alternately.

[0013] Furthermore, the sensor assembly includes an accelerometer for detecting the vibration acceleration of the elevated beam around the blast point, a PVDF piezoelectric film sensor for detecting the overpressure of the shock wave generated by the blast, an earth pressure sensor for detecting the earth pressure generated by the blast, a velocity sensor for detecting the vibration velocity, and a strain gauge sensor for detecting the local deformation of the elevated beam structure around the blast point.

[0014] Furthermore, the contact monitoring points between the sensor assembly and the elevated bridge beam include the middle of the elevated bridge pier, the mass point at the top of the elevated bridge pier, the middle of the elevated bridge beam, and the middle of the upper surface of the elevated structure.

[0015] The present invention has the following beneficial effects:

[0016] 1. This invention provides a blasting vibration monitoring device for the demolition of elevated beams, comprising an outer protective cover, a vibration meter body, a sensor assembly, a first damping telescopic rod, a mounting frame, and an inner protective shell. The outer protective cover is mounted on the upper side of a base plate, the vibration meter body is connected to the base plate via the mounting frame, and the sensor assembly passes through an opening in the base plate to contact the monitoring point. The outer protective cover is fixedly mounted at the monitoring point via the first damping telescopic rod, enabling the outer protective cover to be installed and fixed on uneven or curved mounting surfaces. The inner protective shell is connected to the inner wall of the outer protective cover, forming a buffer space between the outer and inner protective shells. An elastic support frame is installed within the buffer space. This double-layer structure reduces the overall weight of the device, facilitates disassembly and assembly by workers, effectively prevents flying stones from penetrating and damaging the monitoring instrument, and the deformation of the elastic support frame provides a buffering effect, improving the impact resistance of the outer and inner protective covers.

[0017] 2. Buffer balls are provided between the troughs of the elastic support frame and the outer protective cover, and between the crests of the elastic support frame and the inner protective shell. The buffer balls prevent the deformation of the elastic support frame, thereby strengthening the buffering effect and further improving the impact resistance.

[0018] 3. The buffer sphere includes a connecting block, a second damping spring shock absorber, and two support blocks. The two support blocks are connected to the outer protective cover, the inner protective shell, and the elastic support frame through ball heads to form an elastic whole. When the outer protective cover is impacted, the buffer sphere is constrained from rotating, so that the force transmitted from the outer protective cover to the buffer sphere passes through the central axis of the buffer sphere, avoiding damage to the buffer sphere from large lateral forces, ensuring the buffering effect of the buffer sphere, and improving the reliability of the device.

[0019] 4. Multiple second damping telescopic rods are centrally symmetrically arranged on the lower side of the mounting frame. One end of the second damping telescopic rod is hinged to the base plate, and the other end is hinged to the mounting frame. This buffers the vibration force transmitted from the base plate to the mounting frame, avoids oblique vibration of the mounting frame, and improves the stability of the measuring equipment.

[0020] 5. The mounting bracket is also equipped with a signal transmission component and a GPS locator. The outer protective cover and the inner protective shell are respectively provided with a first vent and a second vent, which facilitates the real-time transmission of the monitored vibration data through the outer protective cover to the external data center. This is beneficial for remote monitoring and acquisition of vibration data, and improves the efficiency of vibration monitoring. Attached Figure Description

[0021] The invention will be further described below with reference to the accompanying drawings:

[0022] Figure 1 This is a cross-sectional view of the present invention;

[0023] Figure 2 This is a schematic diagram of the external structure of the present invention;

[0024] Figure 3 This is a cross-sectional view of the outer protective cover, inner protective shell, and elastic support frame of the present invention;

[0025] Figure 4 for Figure 1 Enlarged view of a portion of point A in the middle;

[0026] Figure 5 This is an internal longitudinal sectional view of the first damping telescopic rod of the present invention.

[0027] In the figure, 1. Outer protective cover; 11. First damping telescopic rod; 111. Telescopic tube; 112. Telescopic shaft; 113. Piston; 114. First damping spring shock absorber; 115. Chamber; 116. Stop block; 12. First vent; 13. Second vent; 2. Vibration meter body; 21. Mounting bracket; 211. Signal transmission component; 22. Second damping telescopic rod; 3. Sensor assembly; 4. Inner protective shell; 5. Base plate; 51. Through port; 6. Base plate; 7. Elastic support frame; 8. Buffer ball; 81. Connecting block; 811. Groove; 82. Second damping spring shock absorber; 83. Support block. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0029] like Figure 1-5 As shown, the present invention provides a blasting vibration monitoring device for the demolition of elevated beams, including an outer protective cover 1, a vibration meter body 2, a sensor assembly 3, a first damping telescopic rod 11, a mounting bracket 21, and an inner protective shell 4; the outer protective cover 1 is installed on the upper side of the base plate 5. Specifically, the outer protective cover 1 is hemispherical, the opening of the outer protective cover 1 faces the base plate 5, and it is detachably connected along the edge of the base plate 5.

[0030] One end of the first damping telescopic rod 11 is hinged to the outer wall of the outer protective cover 1, and the other end is hinged to a base plate 6. The base plate 6 is provided with a through hole for installation. The base plate 6 is fixed near the monitoring point by passing an expansion screw through the through hole, so as to realize the installation and fixation of the outer protective cover 1, which is convenient for installation and disassembly. Through the hinged first damping telescopic rod 11, the outer protective cover 1 can be installed and fixed on uneven or curved installation surfaces, and different monitoring points can be installed at different positions of the elevated beam, thereby improving the accuracy of blasting vibration detection data.

[0031] Mounting bracket 21 is hinged to one end of the second damping telescopic rod 22, and the other end of the second damping telescopic rod 22 is hinged to the base plate 5. The vibration meter body 2 is mounted on the upper side of the mounting bracket 21. The sensor assembly 3 is mounted in the through-hole 51 of the base plate 5. The vibration meter body 2 is connected to the sensor assembly 3 via wires. The measuring end of the sensor assembly 3 extends out of the through-hole 51 and directly contacts the elevated bridge beam. The monitoring points of the contact between the sensor assembly 3 and the elevated bridge beam include the middle of the elevated bridge pier, the mass point at the top of the elevated bridge pier, the middle of the elevated bridge beam, and the middle of the upper surface of the elevated bridge, realizing all-round detection of the elevated bridge beam and improving the accuracy of the detection.

[0032] Multiple sensors are used to detect multiple data points on the elevated beam, ensuring monitoring reliability. Sensor component 3 includes an accelerometer for detecting the vibration acceleration of the elevated beam around the blast point, a PVDF piezoelectric film sensor for detecting the overpressure of the shock wave generated by the blast, an earth pressure sensor for detecting the earth pressure generated by the blast, a velocity sensor for detecting the vibration velocity, and a strain gauge sensor for detecting the local deformation of the elevated beam structure around the blast point.

[0033] The inner protective shell 4 is connected to the inner wall of the outer protective cover 1, forming a buffer space between them. This buffer space reduces the overall weight of the device and facilitates assembly and disassembly by workers. Understandably, the inner protective shell 4 and the outer protective cover 1 are designed as a double-shell structure. When objects such as flying stones penetrate the outer protective cover 1 and enter the buffer space, their trajectory changes, causing them to impact the inner protective shell 4 laterally. The annular design of the inner protective shell 4 significantly reduces the probability of frontal penetration by flying stones; thus, the double-shell structure improves the overall impact resistance of the device.

[0034] An "S"-shaped elastic support frame 7 is provided in the buffer space; it can be understood that the "S"-shaped elastic support frame 7 abuts between the inner wall of the outer protective cover 1 and the outer wall of the inner protective shell 4. The "S"-shaped elastic support frame 7 includes crests and troughs. The crests of the elastic support frame 7 abut against the inner wall of the outer protective cover 1, and the troughs of the elastic support frame 7 abut against the outer wall of the inner protective shell 4.

[0035] Buffer spheres 8 are provided between the troughs of the elastic support frame 7 and the outer protective cover 1, and between the crests of the elastic support frame 7 and the inner protective shell 4. Preferably, the buffer spheres 8 are positioned on the symmetrical center line of the troughs or crests of the elastic support frame 7. The buffer spheres 8 provide further cushioning between the elastic support frame 7, the inner protective shell 4, and the outer protective cover 1.

[0036] In this embodiment, both the inner protective shell 4 and the outer protective cover 1 are made of metal materials, such as Figure 3As shown, the inner protective shell 4 is hemispherical; the center of the inner protective shell 4 coincides with the center of the outer protective cover 1; multiple elastic support frames 7 are arranged at intervals around the outer wall of the inner protective shell 4. The multiple elastic support frames 7 are arranged at intervals within the buffer space, and the elastic support frames 7 elastically support the outer protective cover 1 and the inner protective shell 4 in multiple directions, providing an all-round buffering effect.

[0037] During the demolition of the elevated bridge beams, a large number of flying rocks will be generated near the detection point. At the same time, the air shock wave generated at the blast point will act on the outer protective cover 1. When the outer protective cover 1 is hit by flying rocks or other external impacts, the outer protective cover 1 will indent inward and push the elastic support frame 7. The elastic support frame 7 will deform under pressure, absorbing part of the impact force and playing a certain buffering role. The deformation of the elastic support frame 7 will cause the crests and troughs to squeeze the buffer ball 8 towards each other. The reaction of the buffer ball 8 will strengthen the buffering effect of the elastic support frame 7, improve the overall impact resistance of the outer protective cover 1 and the inner protective shell 4, and protect the vibration meter body 2 and sensor assembly 3 from impact damage.

[0038] like Figure 4 As shown, the buffer sphere 8 includes a connecting block 81, a second damping spring shock absorber 82, and two support blocks 83. The two support blocks 83 are symmetrically arranged at both ends of the connecting block 81. Both ends of the connecting block 81 are provided with grooves 811. The inner end of the support block 83 is slidably engaged with the groove 811. The inner end face of the support block 83 is connected to the bottom of the groove 811 through the second damping spring shock absorber 82. The outer end of the support block 83 extends out of the groove 811. The outer ends of the two support blocks 83 are connected between the elastic support frame 7 and the outer wall of the inner protective shell 4, or between the elastic support frame 7 and the outer wall of the outer protective cover 1.

[0039] Preferably, the connecting block 81 is cylindrical, and the support block 83 is divided into a cylindrical part and a hemispherical part. The cylindrical part slides in conjunction with the groove 811, and the hemispherical part is located outside the groove 811. The outer ends of the two support blocks 83 are pressed against each other, and the inner ends of the support blocks 83 slide within the groove 811, causing the bottom of the support blocks 83 to compress the second damping spring shock absorber 82. When the outer protective cover 1 is impacted, the elastic support frame 7 deforms and compresses the buffer ball 8, and the two support blocks 83 move towards each other, absorbing the impact force on the outer protective cover 1 through the second damping spring shock absorber 82.

[0040] like Figure 1 , 4 As shown, the outer ends of the two support blocks 83 located between the trough of the elastic support frame 7 and the outer protective cover 1 are spherically connected to the trough of the elastic support frame 7 and the outer protective cover 1, respectively; the outer ends of the two support blocks 83 located between the crest of the elastic support frame 7 and the inner protective shell 4 are spherically connected to the crest of the elastic support frame 7 and the inner protective shell 4, respectively.

[0041] Specifically, ball heads are installed on the opposing sides of the troughs of the elastic support frame 7 and the inner wall of the outer protective cover 1, and ball heads are installed on the opposing sides of the crests of the elastic support frame 7 and the outer wall of the inner protective shell 4; a concave spherical surface is provided at the outer end of the support block 83, and the concave spherical surface is connected to the corresponding ball head. That is, the buffer ball 8 plays an elastic connection role, movably connecting the elastic support frame 7 between the inner protective shell 4 and the outer protective cover 1.

[0042] Understandably, after the elastic support frame 7 and the buffer ball 8 are installed in the buffer space, the elastic support frame 7 compresses the buffer ball 8 through the ball head. After the elastic support frame 7 deforms, the crests and troughs of the elastic support frame 7 abut against the inner wall of the outer protective cover 1 and the outer wall of the inner protective shell 4, causing displacement. This changes the position of the ball head on the elastic support frame 7, and the ball head on the elastic support frame 7 drives the corresponding support block 83 to move, causing the buffer ball 8 to rotate adaptively within the buffer space. This ensures that the force transmitted from the outer protective cover 1 to the buffer ball 8 passes through the central axis of the buffer ball 8. This design prevents the buffer ball 8 from undergoing both sliding and rotation after the elastic support frame 7 deforms. It also prevents the force transmitted from the outer protective cover 1 to the buffer ball 8 from deviating from the central axis of the buffer ball 8, which would cause the buffer ball 8 to be subjected to a large lateral force and reduce the buffering effect of the buffer ball 8.

[0043] like Figure 2 , 5 As shown, multiple first damping telescopic rods 11 are evenly arranged around the outer protective cover 1; in this embodiment, four first damping telescopic rods 11 are provided. Specifically, several pins of the same specification are fixedly provided on the outer wall of the outer protective cover 1, and the first damping telescopic rods 11 are movably mounted on the pins. Specifically, the first damping telescopic rod 11 includes a telescopic tube 111, a telescopic shaft 112, a piston 113, and a first damping spring shock absorber 114; the fixed end of the telescopic tube 111 is hinged to the base plate 6 through the pins, and the movable end of the telescopic tube 111 is provided with a chamber 115; the fixed end of the telescopic shaft 112 is hinged to the outer wall of the outer protective cover 1 through the pins; the central axis of the telescopic shaft 112 coincides with the central axis of the telescopic tube 111; the movable end of the telescopic shaft 112 extends into the chamber 115 and connects to the outer end face of the piston 113, the piston 113 slides with the inner wall of the chamber 115, and the inner end face of the piston 113 is connected to the bottom of the chamber 115 through the first damping spring shock absorber 114.

[0044] During the demolition of the elevated beam, the blasting vibration is transmitted to the outer protective cover 1 through the base plate 6 and the first damping telescopic rod 11. The first damping telescopic rod 11 buffers the vibration force transmitted from the base plate 6 to the outer protective cover 1. The first damping telescopic rod 11 is simultaneously pushed and pulled by the base plate 6 and the outer protective cover 1, causing the telescopic shaft 112 to drive the piston 113 to slide in the chamber 115. The piston 113 acts on the first damping spring shock absorber 114, which has the functions of shock absorption and pressure resistance, reducing the vibration of the outer protective cover 1 caused by the blast and improving the stability of the outer protective cover 1 during the demolition process.

[0045] A stop 116 is provided on the inner wall of the chamber 115, and the stop 116 abuts against the outer end face of the piston 113. Before the demolition by explosives, the outer protective cover 1 is fixed to the monitoring point of the elevated beam by the base plate 6 and the first damping telescopic rod 11. At this time, the first damping spring shock absorber 114 acts on the inner end face of the piston 113, so that the outer end face of the piston 113 approaches the stop 116 and abuts against the stop 116. The stop 116 limits the range of movement of the piston 113 in the chamber 115, and the first damping telescopic rod 11 stably restricts the position of the outer protective cover 1.

[0046] like Figure 1 As shown, multiple second damping telescopic rods 22 are evenly arranged on the lower side of the mounting frame 21, and these rods are centrally symmetrical. The hinged ends of the multiple second damping telescopic rods 22 are evenly arranged around the center of the vibration meter body 2, and the distance between adjacent upper hinged ends of the multiple second damping telescopic rods 22 is smaller than the distance between adjacent lower hinged ends. When the substrate 5 is subjected to explosive vibration, the second damping telescopic rods 22 buffer the vibration force transmitted from the substrate 5 to the mounting frame 21. Simultaneously, the centrally symmetrical arrangement of the second damping telescopic rods 22 ensures a uniform force on the mounting frame 21, preventing oblique vibration of the mounting frame 21. It can be understood that, under the damping effect of the first damping telescopic rod 11, the addition of the second damping telescopic rods 22 further reduces the vibration of the vibration meter body 2, greatly improving the stability of the measuring equipment; effectively preventing vibration of the vibration meter body 2 caused by explosive vibration, reducing the impact on data transmission, and avoiding damage caused by the vibration of the vibration meter body 2.

[0047] like Figure 3 As shown, the mounting bracket 21 is equipped with a signal transmission component 211 and a GPS locator; the outer protective cover 1 has several first vent holes 12, and the inner protective shell 4 has several second vent holes 13, with the first vent holes 12 and second vent holes 13 distributed alternately. The first vent holes 12 and second vent holes 13 facilitate signal transmission between the signal transmission component 211 and the GPS locator, ensuring that the vibration data of the blasting is transmitted to the external data center in real time, which is conducive to remote monitoring and acquisition of vibration data, improves vibration monitoring efficiency, and avoids data loss caused by damage to the monitoring device due to the blasting.

[0048] In the description of this invention, the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only to describe the invention and not to require the invention to be constructed or operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" in this invention should be interpreted broadly. For example, they can refer to a connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms based on the specific circumstances.

[0049] The above description represents preferred embodiments of the present invention. The specific embodiments are provided solely for a better understanding of the invention's concept. Those skilled in the art will recognize that various improvements or equivalent substitutions can be made based on the principles of the present invention, and these improvements or equivalent substitutions are also considered to fall within the scope of protection of the present invention.

Claims

1. A device for monitoring blasting vibration during the demolition of elevated bridge beams, comprising an outer protective cover (1), a vibration meter body (2), and a sensor assembly (3), characterized in that, It also includes a first damping telescopic rod (11), a mounting bracket (21), and an inner protective shell (4); an outer protective cover (1) is mounted on the upper side of the base plate (5); one end of the first damping telescopic rod (11) is hinged to the outer wall of the outer protective cover (1), and the other end is hinged to a base plate (6); The mounting bracket (21) is hinged to one end of the second damping telescopic rod (22), and the other end of the second damping telescopic rod (22) is hinged to the base plate (5); the vibration meter body (2) is mounted on the upper side of the mounting bracket (21); the sensor assembly (3) is mounted in the through-hole (51) of the base plate (5); the measuring end of the sensor assembly (3) extends out of the through-hole (51) and directly contacts the elevated beam; The inner protective shell (4) is connected to the inner wall of the outer protective cover (1), and a buffer space is formed between the outer protective cover (1) and the inner protective shell (4); an "S"-shaped elastic support frame (7) is provided in the buffer space, and buffer balls (8) are provided between the trough of the elastic support frame (7) and the outer protective cover (1), and between the crest of the elastic support frame (7) and the inner protective shell (4); The outer protective cover (1) is uniformly provided with a plurality of first damping telescopic rods (11) around its perimeter; the first damping telescopic rod (11) includes a telescopic tube (111), a telescopic shaft (112), a piston (113), and a first damping spring shock absorber (114); the fixed end of the telescopic tube (111) is hinged to the base plate (6) by a pin, and the movable end of the telescopic tube (111) is provided with a chamber (115); the fixed end of the telescopic shaft (112) is hinged to the outer wall of the outer protective cover (1) by a pin; the movable end of the telescopic shaft (112) extends into the chamber (115) and is connected to the outer end face of the piston (113), the piston (113) slides with the inner wall of the chamber (115), and the inner end face of the piston (113) is connected to the bottom of the chamber (115) through the first damping spring shock absorber (114); The mounting bracket (21) has a plurality of second damping telescopic rods (22) evenly arranged on its lower side, and the plurality of second damping telescopic rods (22) are centrally symmetrical.

2. The blasting vibration monitoring device for the dismantling of elevated bridge beams as described in claim 1, characterized in that, Multiple elastic support frames (7) are arranged at intervals around the outer wall of the inner protective shell (4).

3. The blasting vibration monitoring device for the dismantling of elevated bridge beams as described in claim 1, characterized in that, The buffer sphere (8) includes a connecting block (81), a second damping spring shock absorber (82), and two support blocks (83). The two support blocks (83) are symmetrically arranged at both ends of the connecting block (81). Both ends of the connecting block (81) are provided with grooves (811). The inner end of the support block (83) is slidably engaged with the groove (811), and the outer end of the support block (83) extends out of the groove (811). The inner end face of the support block (83) is connected to the bottom of the groove (811) through the second damping spring shock absorber (82).

4. The blasting vibration monitoring device for the dismantling of elevated bridge beams as described in claim 3, characterized in that, The outer ends of the two support blocks (83) located between the trough of the elastic support frame (7) and the outer protective cover (1) are spherically connected to the trough of the elastic support frame (7) and the outer protective cover (1); the outer ends of the two support blocks (83) located between the crest of the elastic support frame (7) and the inner protective shell (4) are spherically connected to the crest of the elastic support frame (7) and the inner protective shell (4).

5. The blasting vibration monitoring device for the demolition of elevated beams as described in claim 1, characterized in that, The inner wall of the chamber (115) is provided with a stop (116), which abuts against the outer end face of the piston (113).

6. The blasting vibration monitoring device for the dismantling of elevated bridge beams as described in claim 1, characterized in that, The mounting bracket (21) is provided with a signal transmission component (211) and a GPS locator; the outer protective cover (1) is provided with a plurality of first vent holes (12), and the inner protective shell (4) is provided with a plurality of second vent holes (13), with the first vent holes (12) and the second vent holes (13) being distributed alternately.

7. The blasting vibration monitoring device for the dismantling of elevated bridge beams as described in claim 1, characterized in that, The sensor assembly (3) includes an acceleration sensor for detecting the vibration acceleration of the elevated beam around the blast point, a PVDF piezoelectric film sensor for detecting the overpressure of the shock wave generated by the blast, an earth pressure sensor for detecting the earth pressure generated by the blast, a velocity sensor for detecting the vibration velocity, and a strain gauge sensor for detecting the local deformation of the elevated beam structure around the blast point.

8. The blasting vibration monitoring device for the dismantling of elevated bridge beams as described in claim 1, characterized in that, The contact monitoring points between the sensor assembly (3) and the elevated bridge beam include the middle of the elevated bridge pier, the mass point at the top of the elevated bridge pier, the middle of the elevated bridge beam, and the middle of the upper surface of the elevated structure.

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