A blasting vibration meter

Abstract

The application relates to the field of blasting technology, and particularly discloses a blasting vibration measuring instrument, which comprises a data collector and a sensor, and the data collector and the sensor are connected through wires; further comprises a fixing clamp, a horizontal keeping mechanism, the horizontal keeping mechanism is installed at the bottom of the fixing clamp; a locking mechanism, the locking mechanism is installed at the bottom of the horizontal keeping mechanism; a connecting mechanism, which is used for connecting and fixing the horizontal keeping mechanism and a measured object, the horizontal keeping mechanism can always keep a horizontal state in the case that the measured object is uneven, so that an operator does not need to adjust the horizontal state of the sensor, the use is more convenient, after being fixed through the locking mechanism, the sensor and the measured object can keep rigid connection, so that the installation requirement of the sensor is met, in addition, the connecting mechanism can indirectly contact the sensor and the measured object, so that the adhesive used does not contact the sensor.

Description

Technical Field

[0001] This invention relates to the field of blasting technology, specifically to a blasting vibration meter. Background Technology

[0002] In engineering blasting construction, the hazards caused by blasting vibration are quite prominent. Most civil disputes arising from blasting are due to the adverse effects of blasting vibration on building structures. Therefore, it is necessary to conduct safety monitoring and use quantitative methods to describe the relevant data of blasting vibration in order to avoid hazards and disputes.

[0003] A blasting vibration meter is a portable, specialized device used for long-term on-site acquisition, recording, and storage of blasting vibration and impact signals. It is primarily used to record data such as the velocity, acceleration, and dominant frequency of blasting vibrations. Monitoring blasting vibrations allows for understanding and mastering the characteristics, propagation patterns, impacts on buildings, and damage mechanisms of blasting seismic waves.

[0004] In addition, based on the test results, blasting parameters and construction methods can be adjusted in a timely manner, anti-vibration measures can be formulated, blasting safety operations can be guided, and the harmful effects of blasting vibration can be avoided or reduced.

[0005] Existing blasting vibration meters mainly consist of a data acquisition unit and a sensor. When in use, the sensor is installed on the object being measured, and it is ensured that the sensor is rigidly connected to the object being measured and that the sensor is in a horizontal position. Therefore, a level bubble is often installed on the sensor to help the operator adjust the sensor to a horizontal position.

[0006] In the actual installation of the sensor, if the surface of the measuring point is hard rock or concrete, the staff needs to use adhesives such as epoxy mortar, epoxy resin, and gypsum powder to connect and fix the sensor to the object being measured. Therefore, it is necessary to carry and make the adhesive on site, spread the adhesive evenly on the object to be measured, stick the bottom of the sensor to the adhesive, and then continuously adjust the sensor according to the level bubble to ensure that it is in a horizontal position. The test can only be carried out after the adhesive has solidified.

[0007] Therefore, during the installation of the sensor, the angle of the sensor needs to be adjusted by the staff continuously. The number of adjustments is large and the accuracy cannot be guaranteed. In addition, after use, the adhesive on the sensor needs to be cleaned in time, otherwise it will affect the secondary use of the sensor.

[0008] Therefore, we propose a blasting vibration meter. Summary of the Invention

[0009] The purpose of this invention is to provide a blasting vibration meter to solve the problems mentioned in the background art, such as the need for multiple adjustments, low accuracy, and the need for subsequent cleaning of the sensor.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a blasting vibration meter, comprising: a data acquisition unit and a sensor, wherein the data acquisition unit and the sensor are connected by a wire; further comprising:

[0011] Fixture, used to fix the sensor in place;

[0012] A horizontal holding mechanism is installed at the bottom of the fixed clamp to keep the fixed clamp in a horizontal position at all times.

[0013] The locking mechanism is installed at the bottom of the horizontal holding mechanism to lock and fix the fixing clamp in a horizontal state.

[0014] The connecting mechanism is installed at the bottom of the locking mechanism and is used to connect and fix the horizontal holding mechanism to the object being measured.

[0015] The horizontal holding mechanism includes two mutually perpendicular arc-shaped tracks, which are arranged vertically.

[0016] Two sets of rollers: one set of rollers is installed at the bottom of the fixed fixture, and the other set of rollers is fixed at the bottom of the upper arc track;

[0017] The fixing clamp is installed in the upper arc-shaped track by rolling rollers, and the upper arc-shaped track is installed in the lower arc-shaped track by rolling rollers.

[0018] The locking mechanism includes arc-shaped locking teeth, a connecting rod, a limiting tooth, an adjusting rod, and an adjusting bolt. The connecting rod is coaxially connected to the roller. The locking teeth are installed at both ends of the connecting rod. The limiting tooth meshes with the bottom of the locking teeth. The adjusting rod is installed at the bottom of the limiting tooth. The adjusting bolt is threaded into the adjusting rod, and one end of the adjusting bolt is rotatably installed at the bottom of the lower arc-shaped track.

[0019] The curved track has movable holes on its sides, the end of the connecting rod is located in the movable hole, and the top surface of the curved track has movable grooves, with rollers installed in the movable grooves.

[0020] The connecting mechanism includes a mixing chamber, a piston plate, and an openable and closable extrusion orifice. The mixing chamber is fixed to the bottom of the lower arc-shaped track, the piston plate is slidably installed inside the mixing chamber, and the extrusion orifice is opened at the bottom of the mixing chamber.

[0021] The mixing chamber has a baffle that is slidably installed on its outer side. A rack is fixed to the inner side of the baffle. A gear meshes with the other side of the rack. A rack is meshed with the other side of the gear. The rack is slidably installed on the mixing chamber. The bottom of the rack is fixed to a piston plate. A telescopic rod is fixed to the bottom of the piston plate. A grid plate is slidably installed on the bottom of the mixing chamber. A wedge is provided on one side of the grid plate. A telescopic rod is fixed to the other side of the grid plate. A wedge is fixed to the bottom of the telescopic rod.

[0022] Both telescopic rod one and telescopic rod two consist of a sleeve, a movable rod, and a spring. Spring one is installed inside the sleeve, and the movable rod is slidably installed inside the sleeve.

[0023] The bottom of the lower arc track has two hoppers fixed at its bottom. Connecting pipes are connected to the hoppers, and valves are installed on the connecting pipes. The bottom of the connecting pipes is located at the bottom of the piston plate and is slidably connected to the piston plate.

[0024] The mixing box has a positioning hole at the top, a positioning rod is fixed inside the arc-shaped track below, a positioning groove is opened on the positioning rod, a positioning block is engaged in the positioning groove, a matching rod is fixed on the positioning block, and a pressing rod is fixed on the matching rod. The pressing rod and the matching rod are slidably installed inside the mixing box, and a spring is sleeved on the outside of the pressing rod.

[0025] The fixing clamp has a notch on its side for placing the wire.

[0026] This invention has at least the following beneficial effects:

[0027] 1. The leveling mechanism can keep the sensor level even when the object being measured is uneven, eliminating the need for manual adjustment and making it more convenient to use. After being secured by the locking mechanism, it ensures a rigid connection between the sensor and the object, thus meeting the sensor's installation requirements. In addition, the connecting mechanism allows for indirect contact between the sensor and the object, preventing the adhesive from coming into contact with the sensor and avoiding the hassle of cleaning the sensor later.

[0028] 2. The connecting mechanism also facilitates the production and storage of adhesives, keeping hands clean during the production process and preventing adhesive residue from getting onto other parts of the vibration meter, thus ensuring the overall cleanliness of the vibration meter. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the sensor mounting structure of the present invention;

[0031] Figure 3This is a schematic diagram of the horizontal holding mechanism of the present invention;

[0032] Figure 4 This is a schematic diagram of the locking mechanism of the present invention;

[0033] Figure 5 This is a schematic diagram of the front cross-sectional structure of the sensor of the present invention;

[0034] Figure 6 This is a schematic diagram of the connection structure between the arc-shaped track and the mixing box of the present invention;

[0035] Figure 7 This is a schematic diagram of the top structure of the baffle of the present invention;

[0036] Figure 8 This is a schematic diagram of the internal structure of the mixing chamber of the present invention from a first-view perspective;

[0037] Figure 9 This is a schematic diagram of the internal structure of the mixing chamber of the present invention from a second perspective.

[0038] Figure 10 This is a schematic diagram of the internal structure of telescopic rod one and telescopic rod two of the present invention.

[0039] In the diagram: 1. Data acquisition instrument; 2. Sensor; 3. Fixture; 4. Horizontal holding mechanism; 5. Locking mechanism; 6. Connecting mechanism; 7. Arc track; 8. Roller; 9. Locking gear; 10. Connecting rod; 11. Limiting gear; 12. Adjusting rod; 13. Adjusting bolt; 14. Movable hole; 15. Movable groove; 16. Mixing box; 17. Piston plate; 18. Extrusion hole; 19. Baffle; 20. Rack and pinion. 21. Gear; 22. Rack II; 23. Telescopic rod I; 24. Grating plate; 25. Wedge surface; 26. Wedge block; 27. Sleeve; 28. Movable rod; 29. ​​Spring I; 30. Hopper; 31. Connecting pipe; 32. Valve; 33. Positioning hole; 34. Positioning rod; 35. Positioning groove; 36. Positioning block; 37. Matching rod; 38. Pressing rod; 39. Spring II; 40. Notch; 41. Telescopic rod II. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1

[0042] Please see Figure 1-10The present invention provides a technical solution: a blasting vibration meter, including a data acquisition instrument 1 and a sensor 2. The data acquisition instrument 1 is connected to the sensor 2 through a wire, and the sensor 2 transmits the detected vibration data to the data acquisition instrument 1 for display and storage.

[0043] A fixing clamp 3 is fixedly installed on the outside of the sensor 2. The fixing clamp 3 can securely fix the sensor 2 in the fixing clamp 3, and at the same time, the sensor 2 can be removed from the fixing clamp 3 as needed. Moreover, notches 40 are opened on the side of the fixing clamp 3. The notches 40 are set to place the wire between the data acquisition instrument 1 and the sensor 2. Since the installation arrow on the sensor 2 needs to point to the vibration source, the relative position between the sensor 2 and the fixing clamp 3 can be changed, and the wire is placed at the corresponding notch 40.

[0044] A horizontal holding mechanism 4 is installed at the bottom of the fixed clamp 3. The horizontal holding mechanism 4 can always keep the fixed clamp 3 in a horizontal state, thereby ensuring that the sensor 2 is kept in a horizontal state. Since the object being measured cannot be a perfectly horizontal plane, the horizontal requirement of the sensor 2 cannot be guaranteed when the sensor 2 is not adjusted. Therefore, it may lead to a decrease in the measurement accuracy of the sensor 2 and signal distortion. However, the horizontal holding mechanism 4 in this embodiment can always keep the sensor 2 in a horizontal state without the need for adjustment by the operator, and the accuracy can also be guaranteed.

[0045] Specifically, the horizontal holding mechanism 4 includes two arc-shaped tracks 7 arranged one above the other and interacting with each other, and two sets of rollers 8 arranged one above the other. The upper roller 8 is fixed to the bottom of the fixing clamp 3, and the upper arc-shaped track 7 is installed at the bottom of the upper roller 8. That is, a movable groove 15 is opened inside the upper arc-shaped track 7, and the upper roller 8 rolls in the movable groove 15. The lower roller 8 is installed at the bottom of the upper arc-shaped track 7, and the lower roller 8 is also installed at the bottom of the lower arc-shaped track 7.

[0046] Through the above technical solution, the fixing clamp 3 can roll longitudinally within the upper arc track 7. When the bottom of the horizontal holding mechanism 4 is not parallel, i.e., it is in an inclined state, the fixing clamp 3 will move towards the inclined side under its own gravity until it returns to a horizontal state. Similarly, the lower arc track 7 can be used to ensure that the fixing clamp 3 remains horizontal in the lateral direction. Therefore, even if the lower arc track 7 is fixed on an uneven plane, the upper fixing clamp 3 can remain horizontal without the need for manual adjustment by the operator, making it more convenient to use.

[0047] Since the fixed clamp 3 and the upper arc track 7, as well as the upper arc track 7 and the lower arc track 7, are both in a movable state, they do not meet the requirements for fixing the sensor 2. Therefore, a locking mechanism 5 is also installed on the lower arc track 7. The locking mechanism 5 can lock and fix the fixed clamp 3 after it has come to a stop.

[0048] Specifically, the locking mechanism 5 includes a connecting rod 10, which is coaxially fixed with the roller 8. That is, the roller 8 will drive the connecting rod 10 to rotate together during the rolling process. Locking teeth 9 with the same arc as the arc track 7 are rotatably installed at both ends of the connecting rod 10. When the roller 8 rotates, the connecting rod 10 rotates on the locking teeth 9. When the roller 8 moves, the connecting rod 10 will drive the locking teeth 9 to move. An arc-shaped movable hole 14 is opened on the side of the arc track 7. When the connecting rod 10 moves, it moves within the movable hole 14.

[0049] Each locking tooth 9 has a limiting tooth 11 engaged at its bottom. An adjusting rod 12 is fixed at the bottom of the limiting tooth 11, and the adjusting rod 12 is slidably connected to the lower arc track 7. An adjusting bolt 13 is threaded inside the adjusting rod 12, and the end of the adjusting bolt 13 is rotatably mounted on the lower arc track 7.

[0050] With the above technical solution, after the fixing clamp 3 remains stationary, that is, after the fixing clamp 3 and the sensor 2 are in a horizontal state, the adjusting bolt 13 is rotated. The adjusting bolt 13 drives the limiting tooth 11 to engage with the adjusted locking tooth 9, thereby fixing the stationary fixing clamp 3.

[0051] In summary, in this embodiment, the horizontal holding mechanism 4 is not limited by the installation site and can keep the fixing clamp 3 and the sensor 2 in a horizontal state at all times. When installing the sensor 2, the lower arc track 7 can be installed on the object to be measured first. The fixing clamp 3 will automatically adjust according to the angle after installation. After adjustment, the fixing clamp 3 in the horizontal state can be locked and fixed by the locking mechanism 5.

[0052] Example 2

[0053] The bottom of the horizontal holding mechanism 4 is also equipped with a connecting mechanism 6. The connecting mechanism 6 is used to connect the horizontal holding mechanism 4 with the object being measured. Specifically, the connecting mechanism 6 includes a mixing box 16. A piston plate 17 is slidably installed inside the mixing box 16. At the same time, a plurality of evenly arranged extrusion holes 18 are opened at the bottom of the mixing box 16. The opening and closing state of the extrusion holes 18 can be adjusted according to the user's needs.

[0054] Regarding the adjustment of opening and closing of the extrusion orifice 18, firstly, a grid plate 24 is slidably installed on the extrusion orifice 18. When the grid plate 24 slides to contact the extrusion orifice 18, the extrusion orifice 18 will be blocked, thus achieving the closed state of the extrusion orifice 18. When the grid plate 24 slides to no longer contact the extrusion orifice 18, the extrusion orifice 18 is in the open state. Specifically, a baffle 19 is slidably installed on the outside of the mixing box 16. A rack 20 is fixed at the bottom of the baffle 19. A gear 21 meshes on the other side of the rack 20. The gear 21 is rotatably installed on the top of the mixing box 16. A rack 22 meshes on the other side of the gear 21. The rack 22 is slidably installed inside the mixing box 16, and the bottom of the rack 22 is fixed on the piston plate 17.

[0055] Meanwhile, a telescopic rod 23 is fixed at the bottom of the piston plate 17, and a wedge 26 is fixed at the bottom of the telescopic rod 23. A wedge surface 25 is provided at one end of the grid plate 24 near the wedge 26, and a telescopic rod 41 is fixed at the other end of the grid plate 24. Both the telescopic rod 23 and the telescopic rod 41 are composed of a sleeve 27, a spring 29, and a movable rod 28. The sleeve 27 in the telescopic rod 23 is fixed to the piston plate 17, while the sleeve 27 in the telescopic rod 41 is fixed to the side wall of the mixing box 16. The movable rod 28 is slidably installed inside the sleeve 27. The spring 29 is located inside the sleeve 27, and one end of the spring 29 is fixed to the movable rod 28 while the other end is fixed inside the sleeve 27. It should be noted that the elasticity of the spring 29 in the telescopic rod 23 is much greater than that of the spring 29 in the telescopic rod 41.

[0056] Through the above technical solution, the main function of the mixing box 16 is to make the adhesive. Taking the most commonly used gypsum powder as an example, the mixing box 16 can mix gypsum powder and water. That is, gypsum powder and water are added into the mixing box 16, and the powder and water are mixed by shaking the mixing box 16. At this time, the grid plate 24 is in contact with the extrusion hole 18, and the extrusion hole 18 is in a closed state. When it is necessary to contact and fix the mixing box 16 with the object to be tested, the baffle 19 is in contact with the object to be tested. During the contact process, the fixing clamp 3 is pressed down, and the fixing clamp 3 drives the mixing box 16 to move downward, while the baffle 19 remains stationary relative to the object to be tested. When the mixing box 16 slides downward, the gear 21 meshes with the rack 20, so that the gear 21 rotates clockwise. When the gear 21 rotates clockwise, it meshes with the rack 22, so that the rack 22 moves downward. When the rack 22 moves downward, it drives the piston plate 17 to move downward.

[0057] When the piston plate 17 moves downward, it first drives the telescopic rod 23 to move. When the wedge block 26 at the bottom of the telescopic rod 23 contacts the wedge surface 25 at the end of the grid plate 24, it squeezes the inclined surface, causing the grid plate 24 to slide and thus remove the grid plate 24 from the extrusion hole 18. After it is removed, the extrusion hole 18 is opened, and the piston plate 17 continues to move downward, squeezing the mixture in the mixing box 16 evenly from the extrusion hole 18 to the bottom of the mixing box 16 until the mixture contacts the object to be tested. During the extrusion process, the baffle 19 has a certain obstruction effect on the mixture, thereby preventing the mixture from overflowing. The mixture can be more fully utilized between the mixing box 16 and the object to be tested, ensuring the stability of the connection between the mixing box 16 and the object to be tested.

[0058] Two hoppers 30 are installed at the bottom of the lower arc track 7. Each hopper 30 has a connecting pipe 31 fixed to its bottom, and a valve 32 is installed on each connecting pipe 31. The bottom of the connecting pipe 31 is located at the bottom of the piston plate 17 and is slidably connected to the piston plate 17. The hopper 30 can pre-store the raw materials for making adhesives. When in use, the valve 32 can be opened to transport the raw materials to the bottom of the mixing box 16. Therefore, there is no need to carry the tools and raw materials for making adhesives, which is more convenient when taking them out.

[0059] In summary, in this embodiment, the sensor 2 is indirectly installed with the object being measured. That is, the sensor 2 is not involved with the mixture during installation, so there is no need to clean the sensor 2 during subsequent cleaning. This ensures the cleanliness of the sensor 2 and avoids the corrosion and other effects of the mixture on the sensor 2. Moreover, the sensor 2 does not come into direct contact with the mixture during its preparation, and the raw materials of the mixture will not get on the hands. This ensures that the operator's hands are clean during operation, and the raw materials of the mixture will not be left on other parts of the vibration meter when operating other parts.

[0060] Example 3:

[0061] In addition to ground installation, sensor 2 can also be installed on a side wall or a top arch. For top arch installation, simply connect the mixing box 16 to the top. The connected mixing box 16 can be reinforced with a clamp. At this time, sensor 2 is suspended in mid-air. If it is tilted after installation, the fixing clamp 3 will also move adaptively under its own gravity until it returns to a horizontal state. For side wall installation, the mixing box 16 can be fixed to the side wall in the same way. At this time, the arrow of sensor 2 faces the side. In order to meet the installation requirement that the arrow always points upward (the arrow of the top arch installation does not need to be kept pointing upward), a positioning hole 33 is opened on the top of the mixing box 16. A positioning rod 34 is fixed inside the lower arc track 7. A positioning groove 35 is opened on the positioning rod 34. A positioning block 36 is engaged in the positioning groove 35. A matching rod 37 is fixed on the positioning block 36. A pressing rod 38 is fixed on the matching rod 37. The pressing rod 38 and the matching rod 37 are slidably installed in the mixing box 16. A spring 39 is sleeved on the outside of the pressing rod 38.

[0062] Meanwhile, a positioning hole 33 and a pressing mechanism are also provided on the side of the mixing box 16. Therefore, when installing on the side wall, the pressing rod 38 can be pressed. When the pressing rod 38 is pressed, it drives the mating rod 37 to slide and causes the positioning block 36 to separate from the positioning groove 35. At this time, the horizontal holding mechanism 4 and the sensor 2 can be removed from the mixing box 16 and installed into the positioning hole 33 on the side. The sensor 2 can then be reinstalled. Therefore, the sensor 2 can be installed on the surface of the mixing box 16. This ensures that the mixing box 16 can be installed on the side wall and that the arrow of the sensor 2 is pointing upward.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A blasting vibration meter, comprising: The data acquisition device (1) and the sensor (2) are connected by a wire; characterized in that it further includes: Fixture (3), the fixture (3) is used to fix the sensor (2); A horizontal holding mechanism (4) is installed at the bottom of the fixed clamp (3) to keep the fixed clamp (3) in a horizontal state at all times; Locking mechanism (5), which is installed at the bottom of horizontal holding mechanism (4) to lock and fix the fixing clamp (3) in the horizontal state; A connecting mechanism (6) is installed at the bottom of the locking mechanism (5) and is used to connect and fix the horizontal holding mechanism (4) to the object being measured. The horizontal holding mechanism (4) includes two mutually perpendicular arc-shaped tracks (7), and the two arc-shaped tracks (7) are arranged vertically. Two sets of rollers (8), one set of rollers (8) is installed at the bottom of the fixed clamp (3), and the other set of rollers (8) is fixed at the bottom of the upper arc track (7); The fixing clamp (3) is rolled in the upper arc track (7) by a set of rollers (8), and the upper arc track (7) is rolled on the lower arc track (7) by another set of rollers (8); The locking mechanism (5) includes an arc-shaped locking tooth (9), a connecting rod (10), a limiting tooth (11), an adjusting rod (12), and an adjusting bolt (13). The connecting rod (10) is coaxially connected to the corresponding roller (8). The locking tooth (9) is installed at both ends of the connecting rod (10). The limiting tooth (11) meshes with the bottom of the locking tooth (9). The adjusting rod (12) is installed at the bottom of the limiting tooth (11). The adjusting bolt (13) is threaded into the adjusting rod (12), and one end of the adjusting bolt (13) is rotatably installed at the bottom of the lower arc-shaped track (7). The connecting mechanism (6) includes a mixing box (16), a piston plate (17), and an openable and closable extrusion hole (18). The mixing box (16) is fixed to the bottom of the lower arc track (7) for making adhesive. The piston plate (17) is slidably installed inside the mixing box (16) for extruding the mixture. The extrusion hole (18) is opened at the bottom of the mixing box (16) for extruding the mixture to bond the test object.

2. The blasting vibration meter according to claim 1, characterized in that: The side of the arc track (7) is provided with movable holes (14), the end of the connecting rod (10) is located in the movable holes (14), the top surface of the arc track (7) is provided with movable grooves (15), and the roller (8) is installed in the movable grooves (15).

3. The blasting vibration meter according to claim 1, characterized in that: A baffle (19) is slidably installed on the outside of the mixing box (16). A rack (20) is fixed on the inside of the baffle (19). A gear (21) meshes on the other side of the rack (20). A rack (22) meshes on the other side of the gear (21). The rack (22) is slidably installed on the mixing box (16). The bottom of the rack (22) is fixed on the piston plate (17). A telescopic rod (23) is fixed on the bottom of the piston plate (17). A grid plate (24) is slidably installed on the bottom of the mixing box (16). A wedge (25) is provided on one side of the grid plate (24). A telescopic rod (41) is fixed on the other side of the grid plate (24). A wedge (26) is fixed on the bottom of the telescopic rod (23).

4. The blasting vibration meter according to claim 3, characterized in that: Both the first telescopic rod (23) and the second telescopic rod (41) are composed of a sleeve (27), a movable rod (28) and a spring (29). The spring (29) is installed inside the sleeve (27), and the movable rod (28) is slidably installed inside the sleeve (27).

5. The blasting vibration meter according to claim 4, characterized in that: The bottom of the arc track (7) below is fixed with two hoppers (30), and a connecting pipe (31) is connected to the hopper (30). A valve (32) is installed on the connecting pipe (31). The bottom of the connecting pipe (31) is located at the bottom of the piston plate (17) and is slidably connected to the piston plate (17).

6. The blasting vibration meter according to claim 5, characterized in that: The mixing box (16) has a positioning hole (33) on its top. A positioning rod (34) is fixed inside the arc-shaped track (7) below. A positioning groove (35) is provided on the positioning rod (34). A positioning block (36) is engaged in the positioning groove (35). A matching rod (37) is fixed on the positioning block (36). A pressing rod (38) is fixed on the matching rod (37). The pressing rod (38) and the matching rod (37) are slidably installed in the mixing box (16). A spring (39) is sleeved on the outside of the pressing rod (38).

7. The blasting vibration meter according to claim 1, characterized in that: The fixing clamp (3) has a notch (40) on its side for placing the wire.

Images