Micro-vibration control method for large science device and vibration exciter base structure

Abstract

The invention discloses a vibration exciter base structure for a large science device, and belongs to the technical field of micro-vibration control, the vibration exciter base structure comprises a concrete bottom plate, an adjusting support and a plurality of timber piles, the top surface of the concrete bottom plate is provided with a plurality of pile repairing holes, the timber piles can be inserted into the pile repairing holes, the adjusting support comprises a mounting frame, and the mounting frame is provided with a plurality of through holes. Four formworks used for abutting against the side faces of the concrete bottom plate are installed on the installation frame, the four formworks are two first plates parallel to each other and two second plates parallel to each other, the first plates and the second plates are perpendicular to each other, the width of the first plates is the same as that of the concrete bottom plate, and the width of the second plates is the same as that of the concrete bottom plate. The width of the second plate is larger than that of the concrete bottom plate. The vibration source can be accurately controlled through testing, the vibration influence on the surrounding environment can be reduced, and interference on other buildings and facilities is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of micro-vibration control, and in particular to a micro-vibration control method and an exciter base structure for large scientific devices. Background Art

[0002] Large scientific facilities, such as particle accelerators, synchrotron radiation sources, and astronomical observation equipment, have extremely strict requirements for micro-vibration control of the environment. During the operation of these precision equipment, even tiny vibrations may cause deviations in experimental data and affect the accuracy and reliability of scientific research.

[0003] In the construction of traditional large scientific facilities, the control of micro-vibration usually relies on passive vibration isolation measures such as thick concrete foundations and vibration isolation trenches. However, with the increasing environmental requirements for scientific experiments, these traditional passive vibration isolation methods have been unable to meet the high-precision requirements. In addition, passive vibration isolation measures have a long construction period, high cost, and are difficult to adapt to complex geological conditions and variable vibration source environments. Summary of the invention

[0004] In order to improve the problem that existing passive vibration isolation methods are difficult to adapt to complex geological conditions and changeable vibration source environments, the present application provides a micro-vibration control method and an exciter base structure for large scientific devices.

[0005] The present application provides a micro-vibration control method for a large scientific device and an exciter base structure using the following technical solutions: A micro-vibration control method for a large scientific device and an exciter base structure, comprising the following steps: S1. Measure the vibration response of the pile top and the foundation structure of the large scientific device to ensure that the RMS value of the displacement meets the requirements; S2. The area around the large scientific facility is divided into protection ranges, with each level being 30 meters. Within different protection ranges, acceleration sensors are used to measure ground pulsations, and numerical analysis is performed to determine the dominant period, which serves as the basis for the design of the exciter base.

[0006] S3. Set up a vibration exciter base at a location where artificial vibration excitation is required, and use an acceleration sensor to measure the natural vibration period of the vibration exciter base; compare the natural vibration period with the ground excellent period, and make multiple fine adjustments to the vibration exciter base until the natural vibration period of the vibration exciter base is the same as the ground excellent period; S4. Arrange an electromagnetic driven artificial vibration source on the vibration exciter base to simulate vibration sources in different environments; S5. By measuring the vibration curves of vehicles with different loads, ordinary vehicles and pedestrians, the vibration input curves of different types of vibration sources are quantitatively fitted; the input curves are input into the artificial vibration source device for simulation; S6. While driving the artificial vibration source, measure the RMS value on the large scientific device. First adjust the speed for control. If the speed cannot meet the requirements, further adjust the position, weight limit and other parameters to meet the vibration control requirements.

[0007] By adopting the above technical solution, the method is not only applicable to newly built large scientific facilities, but also to the transformation and upgrading of existing facilities, and has wide adaptability; through precise control of the vibration source, the vibration impact on the surrounding environment can be reduced, and the interference with other buildings and facilities can be reduced; by controlling vibration, structural damage and safety accidents caused by vibration can be reduced, and the safety of large scientific facilities and their surrounding environment can be improved.

[0008] A vibrator base structure for a large scientific device comprises a concrete base plate, an adjustment bracket and a plurality of wooden piles, wherein a plurality of pile-filling holes are provided on the top surface of the concrete base plate, and the wooden piles can be inserted into the pile-filling holes, and the adjustment bracket comprises a mounting frame, and four templates for abutting against the side surfaces of the concrete base plate are mounted on the mounting frame, and the four templates are respectively two mutually parallel plates 1 and two mutually parallel plates 2, the plates 1 and 2 are arranged perpendicular to each other, the width of the plates 1 is the same as the width of the concrete base plate, and the width of the plates 2 is greater than the width of the concrete base plate.

[0009] By adopting the above technical scheme, an acceleration sensor is used to measure the natural vibration period of the exciter base. When the natural vibration period is greater than the ground period, a part of wooden piles are added in the filling pile hole, and the filling pile hole is filled with reinforced concrete, wherein the top of the wooden pile is penetrated with steel bars and connected to the concrete slab as a whole; when the natural vibration period is less than the ground outstanding period, the filling pile hole is closed and concrete is poured on the top of the concrete bottom plate to increase the thickness of the concrete bottom plate.

[0010] Preferably, the mounting frame includes a mounting plate, in which two mutually perpendicular bidirectional screws are passed, the bidirectional screw is rotatably connected to the mounting plate, two ends of the bidirectional screw are respectively fixed with fixed blocks, a guide rod is fixed between the two fixed blocks, the guide rod passes through the template, the two bidirectional screws are respectively screw one and screw two, the plate is set on the outer periphery of screw one, the plate one is threadedly matched with the screw one, the plate two is set on the outer periphery of screw two, the plate two is threadedly matched with the screw two.

[0011] By adopting the above technical solution, screw rod one is rotated so that the two plates one are moved toward the direction close to the concrete bottom plate and fit with the side of the concrete bottom plate, and screw rod two is rotated so that the two plates two are moved toward the direction close to the concrete bottom plate, thereby completing the abutment between the template and the concrete bottom plate, so as to facilitate concrete pouring on the surface of the concrete bottom plate and improve construction efficiency.

[0012] Preferably, a positioning groove is provided on the side of the template close to the concrete base plate, and a positioning block is installed on the template for sliding along its own thickness direction through the positioning groove, and the bottom surface of the positioning block can be fitted with the top surface of the concrete base plate, and a sliding block is fixed to the side of the positioning block, and a sliding groove is provided on the inner wall of the positioning groove, and the sliding block slides with the template along the thickness direction of the template through the sliding groove, and a sliding spring is fixed on the side of the sliding block away from the concrete base plate, and one end of the sliding spring away from the sliding block is fixedly connected to the inner wall of the sliding groove.

[0013] By adopting the above technical solution, when the template fits against the side of the concrete base plate, the positioning block moves toward the direction close to the concrete base plate under the elastic force of the sliding spring, and the bottom surface of the positioning block fits against the top surface of the concrete base plate, thereby ensuring the fit between the template and the side of the concrete base plate.

[0014] Preferably, a through hole connected to the positioning groove is provided on the side of the template away from the concrete base plate, a connecting rod is inserted in the through hole, the connecting rod is rotatably connected to the positioning block, a clamping block is installed at the end of the connecting rod away from the positioning block, a fixing block is fixed on the side of the template away from the concrete base plate, and a clamping groove for placing the clamping block is provided on the side of the fixing block away from the template.

[0015] By adopting the above technical solution, the connecting rod is pulled, and the connecting rod drives the positioning block to move in the direction away from the concrete base plate, and then the clamping block is rotated so that the clamping block is inserted into the clamping groove of the fixed block. At this time, the side of the positioning block close to the concrete base plate is coplanar with the side of the concrete base plate.

[0016] Preferably, sliding grooves are respectively provided on the relative inner sides of the two plates, and a sliding block is installed on the plate one for sliding along its own length direction through the sliding groove. A sliding plate is fixed between the two sliding blocks, a scraper is installed at the bottom of the sliding plate, and an adjusting part for adjusting the height of the scraper is provided on the sliding plate.

[0017] By adopting the above technical solution, after pouring concrete into the space surrounded by the template, the height of the scraper is adjusted by the adjusting member, and then the scraper is moved to level the concrete surface.

[0018] Preferably, the adjusting member includes an adjusting screw passing through the sliding plate, the adjusting screw is threadably matched with the sliding plate, the bottom end of the adjusting screw is rotatably connected to the top surface of the scraper, an adjusting rod is fixed to the bottom surface of the sliding plate, and an adjusting hole for inserting the adjusting rod is opened on the top surface of the scraper.

[0019] By adopting the above technical solution, the adjusting rod provides a guiding function for the scraper, and the adjusting screw is rotated to adjust the height of the scraper, so that the scraper can level the concrete surface.

[0020] Preferably, the second plate includes a main body, a movable groove is provided on the bottom surface of the main body, a movable plate is installed on the main body through the movable groove for vertical sliding, and clearance blocks are fixed on both sides of the movable plate respectively, a clearance groove is provided on the inner wall of the movable groove, the clearance block is vertically slidably matched with the main body through the clearance groove, a control screw is rotatably installed on the bottom of the main body, and the control screw is threadedly matched with one of the clearance blocks.

[0021] By adopting the above technical solution, the control screw is rotated, and the control screw drives the movable plate to move downward through the stop block, so that the movable plate moves to a corresponding height, and the scraper scrapes off excess concrete through the movable groove.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through precise control of the vibration source, the vibration impact on the surrounding environment can be reduced, and the interference with other buildings and facilities can be reduced; through vibration control, structural damage and safety accidents caused by vibration can be reduced, and the safety of large scientific facilities and their surrounding environment can be improved; 2. When the first period is greater than the ground period, a part of the wood pile is added to the filling pile hole, and the filling pile hole is filled with reinforced concrete, wherein the top of the wood pile is penetrated with steel bars and connected to the concrete slab as a whole; when the first period is less than the ground superior period, the filling pile hole is closed and concrete is poured on the top of the concrete bottom slab to increase the thickness of the concrete bottom slab; 3. Rotate screw rod 1 to make the two plates 1 move toward the direction close to the concrete bottom plate and fit with the side of the concrete bottom plate, and then rotate screw rod 2 to make the two plates 2 move toward the direction close to the concrete bottom plate, thereby completing the abutment between the formwork and the concrete bottom plate, so as to facilitate concrete pouring on the surface of the concrete bottom plate and improve construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the installation structure of the concrete base plate and wooden piles of the exciter base structure for a large scientific device in an embodiment of the present application.

[0024] Figure 2 It is a schematic diagram of the structure of the adjustment bracket in the exciter base structure for a large scientific device according to an embodiment of the present application.

[0025] Figure 3 It is a cross-sectional view of a template in a vibrator base structure for a large scientific device according to an embodiment of the present application.

[0026] Figure 4 It is a schematic diagram of the installation structure of the scraper in the exciter base structure for a large scientific device in an embodiment of the present application.

[0027] Figure 5 It is a cross-sectional view of plate 2 in the structure of the exciter base for a large scientific device according to an embodiment of the present application.

[0028] 1. Concrete base plate; 11. Hole for filling piles; 12. Wooden piles; 2. Adjustment bracket; 21. Mounting frame; 22. Mounting plate; 23. Bidirectional screw; 231. Screw one; 232. Screw two; 24. Guide rod; 3. Template; 31. Plate one; 32. Plate two; 321. Main body; 322. Moving plate; 323. Moving groove; 324. Displacement block; 325. Displacement groove; 326. Control screw; 33. Positioning block; 34. Positioning groove; 35. Sliding block; 36. Sliding groove; 37. Sliding spring; 4. Connecting rod; 41. Through hole; 42. Snap-in block; 43. Fixed block; 44. Snap-in groove; 5. Scraper; 51. Sliding groove; 52. Sliding block; 53. Sliding plate; 54. Adjustment screw; 55. Adjustment rod; 56. Adjustment hole. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-5 This application is described in further detail.

[0030] The embodiments of the present application disclose a micro-vibration control method and an exciter base structure for a large scientific device.

[0031] A micro-vibration control method for a large scientific device comprises the following steps: S1. Measure the vibration response of the pile top and the foundation structure of the large scientific device to ensure that the RMS value of the displacement meets the requirements. According to the measured excellent period, design a personalized exciter base to ensure that its vibration characteristics match the environment and improve the effect of vibration control.

[0032] S2. The area around the large scientific facility is divided into protection ranges, with each level being 30 meters. Within different protection ranges, acceleration sensors are used to measure ground pulsations, and numerical analysis is performed to determine the dominant period, which serves as the basis for the design of the exciter base. By adjusting the design of the exciter base, it is possible to flexibly respond to different vibration environments and achieve precise vibration control.

[0033] S3. A vibration exciter base is arranged at a location where artificial vibration excitation is required. The vibration exciter base includes a concrete base plate 1 and wooden piles 12. A pile filling hole 11 is opened on the top surface of the concrete base plate 1.

[0034] S4. Use an acceleration sensor to measure the natural vibration period of the exciter base; compare the natural vibration period with the ground superior period; if the natural vibration period is greater than the ground period, add wooden piles 12 in the pile hole 11 and fill the missing pile hole 11 with reinforced concrete; if the natural vibration period is less than the ground period, close the pile hole 11 and increase the concrete thickness on the top surface of the concrete base plate 1; perform fine-tuning several times until the requirements are met. By accurately controlling micro-vibrations, the stability of large scientific facilities and the accuracy of experimental data can be significantly improved, thereby improving the quality of scientific research.

[0035] S5. An electromagnetically driven artificial vibration source is arranged on the base of the vibrator to simulate vibration sources in different environments; through intelligent control and fine-tuning, excessive energy consumption is avoided, which has the advantages of energy saving and environmental protection.

[0036] S6. By measuring the vibration curves of vehicles with different loads, ordinary vehicles and pedestrians, the vibration input curves of different types of vibration sources are quantitatively fitted; the input curves are input into the artificial vibration source device for simulation.

[0037] S7. While driving the artificial vibration source, measure the RMS value on the large scientific device. First adjust the speed for control. If the speed cannot meet the requirements, further adjust the position, weight limit and other parameters to meet the vibration control requirements.

[0038] The implementation principle of a micro-vibration control method for large scientific facilities is: by precisely controlling the vibration source, the vibration impact on the surrounding environment can be reduced, and the interference with other buildings and facilities can be reduced; by controlling vibration, structural damage and safety accidents caused by vibration can be reduced, and the safety of large scientific facilities and their surrounding environment can be improved.

[0039] Reference Figure 1 and Figure 2 , an exciter base structure for a large scientific device, comprising a concrete base plate 1, an adjustment bracket 2 and a plurality of wooden piles 12. A plurality of pile-filling holes 11 are provided on the top surface of the concrete base plate 1, into which the wooden piles 12 can be inserted. The adjustment bracket 2 comprises a mounting frame 21, on which four templates 3 for abutting against the side surfaces of the concrete base plate 1 are mounted. The mounting frame 21 comprises a mounting plate 22, in which two mutually perpendicular bidirectional screw rods 23 are penetrated, and the bidirectional screw rod 23 is rotatably connected to the mounting plate 22. Fixed blocks 43 are respectively fixed at both ends of the bidirectional screw rod 23, and a guide rod 24 is fixed between the two fixed blocks 43, and the guide rod 24 passes through the template 3.

[0040] Reference Figure 1 and Figure 2 The four templates 3 are two mutually parallel plates 1 31 and two mutually parallel plates 2 32, and the plates 1 31 and 2 32 are arranged perpendicular to each other. The width of the plate 1 31 is the same as the width of the concrete bottom plate 1, and the width of the plate 2 32 is greater than the width of the concrete bottom plate 1. The two bidirectional screws 23 are screw 1 231 and screw 2 232, respectively. The plate 1 31 is sleeved on the outer periphery of the screw 1 231, and the plate 1 31 and the screw 1 231 are threadedly matched. The plate 2 32 is sleeved on the outer periphery of the screw 2 232, and the plate 2 32 and the screw 2 232 are threadedly matched.

[0041] Reference Figure 2 and Figure 3 The side of the template 3 close to the concrete bottom plate 1 is provided with a positioning groove 34, and the template 3 is slidably installed with a positioning block 33 along its own thickness direction through the positioning groove 34, and the bottom surface of the positioning block 33 can fit with the top surface of the concrete bottom plate 1. Sliding blocks 35 are fixed on both sides of the positioning block 33, and the inner wall of the positioning groove 34 is provided with a sliding groove 36. The sliding block 35 slides and cooperates with the template 3 along the thickness direction of the template 3 through the sliding groove 36. A sliding spring 37 is fixed on the side of the sliding block 35 away from the concrete bottom plate 1, and one end of the sliding spring 37 away from the sliding block 35 is fixedly connected to the inner wall of the sliding groove 36. A through hole 41 connected to the positioning groove 34 is provided on the side of the template 3 away from the concrete bottom plate 1, and a connecting rod 4 is inserted into the through hole 41, and the connecting rod 4 is rotatably connected to the positioning block 33. A clamping block 42 is installed at the end of the connecting rod 4 away from the positioning block 33 , a fixing block 43 is fixed to the side of the template 3 away from the concrete base plate 1 , and a clamping groove 44 for placing the clamping block 42 is opened on the side of the fixing block 43 away from the template 3 .

[0042] When the template 3 fits with the side of the concrete base plate 1, the positioning block 33 moves toward the direction close to the concrete base plate 1 under the elastic force of the sliding spring 37, and the bottom surface of the positioning block 33 fits with the top surface of the concrete base plate 1 to ensure the fitting effect of the template 3 and the side of the concrete base plate 1; after the template 3 is completely fitted with the concrete base plate 1, the connecting rod 4 is pulled, and the connecting rod 4 drives the positioning block 33 to move in the direction away from the concrete base plate 1, and then the clamping block 42 is rotated so that the clamping block 42 is inserted into the clamping groove 44 of the fixing block 43. At this time, the side of the positioning block 33 close to the concrete base plate 1 is coplanar with the side of the concrete base plate 1.

[0043] Reference Figure 4, sliding grooves 51 are respectively provided on the opposite inner sides of the two plates 1 31, and a sliding block 52 is installed on the plate 1 31 through the sliding grooves 51 to slide along its length direction. A sliding plate 53 is fixed between the two sliding blocks 52, and an adjusting screw 54 is penetrated on the top surface of the sliding plate 53, and the adjusting screw 54 is threadedly matched with the sliding plate 53. A scraper 5 is installed at the bottom end of the adjusting screw 54, and the scraper 5 is rotatably connected to the adjusting screw 54. Two adjusting rods 55 are fixed on the bottom surface of the sliding plate 53, and an adjusting hole 56 for inserting the adjusting rod 55 is provided on the top surface of the scraper 5, and the adjusting rod 55 limits the scraper 5.

[0044] After pouring concrete into the space surrounded by the template 3, the adjusting screw 54 is rotated to adjust the height of the scraper 5 so that the scraper 5 can scrape the concrete surface flat.

[0045] Reference Figure 5 The plate 2 32 includes a body 321, a moving groove 323 is provided on the bottom surface of the body 321, and the body 321 is provided with a moving plate 322 which is slidably mounted in the vertical direction through the moving groove 323. A clearance block 324 is fixed on both sides of the moving plate 322, and a clearance groove 325 is provided on the inner wall of the moving groove 323, and the clearance block 324 is slidably matched with the body 321 in the vertical direction through the clearance groove 325. A control screw 326 is rotatably mounted on the bottom of the body 321, and the control screw 326 is threadedly matched with one of the clearance blocks 324.

[0046] The control screw 326 is rotated, and the control screw 326 drives the movable plate 322 to move downward through the clearance block 324, so that the movable plate 322 moves to a corresponding height, and the scraper 5 scrapes off the excess concrete through the movable groove 323.

[0047] The implementation principle of an exciter base structure for a large scientific device is as follows: using screw rod 1 231 and screw rod 232, plate 1 31 and plate 2 32 are made to fit with the side of a concrete base plate 1, and then concrete is poured. After the pouring is completed, a scraper 5 is used to scrape the concrete on the top surface of the concrete base plate 1, and the excess concrete can be scraped off through a movable groove 323, so the construction efficiency is relatively high.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A micro-vibration control method for a large scientific device, characterized in that: The following steps are involved: S1. Measure the vibration response of the pile top and the foundation structure of the large scientific device to ensure that the RMS value of the displacement meets the requirements; S2. The area around the large scientific facility is divided into protection ranges, with each level being 30 meters. Within different protection ranges, acceleration sensors are used to measure ground pulsations, and numerical analysis is performed to determine the dominant period, which serves as the basis for the design of the exciter base. 2.S3. Set up the vibration exciter base at the location where artificial vibration excitation is required, and use an acceleration sensor to measure the natural vibration period of the vibration exciter base; compare the natural vibration period with the ground excellent period, and make multiple fine adjustments to the vibration exciter base until the natural vibration period of the vibration exciter base is the same as the ground excellent period; S4. Arrange an electromagnetic driven artificial vibration source on the vibration exciter base to simulate vibration sources in different environments; S5. By measuring the vibration curves of vehicles with different loads, ordinary vehicles and pedestrians, the vibration input curves of different types of vibration sources are quantitatively fitted; the input curves are input into the artificial vibration source device for simulation; S6. While driving the artificial vibration source, measure the RMS value on the large scientific device. First adjust the speed for control. If the speed cannot meet the requirements, further adjust the position, weight limit and other parameters to meet the vibration control requirements.

3. The exciter base structure for a large scientific device according to claim 1, based on the micro-vibration control method for a large scientific device according to claim 1, characterized in that: The invention comprises a concrete base plate (1), an adjustment bracket (2) and a plurality of wooden piles (12). The top surface of the concrete base plate (1) is provided with a plurality of pile-filling holes (11), and the wooden piles (12) can be inserted into the pile-filling holes (11). The adjustment bracket (2) comprises a mounting frame (21), and the mounting frame (21) is provided with four templates (3) for contacting the side surfaces of the concrete base plate (1). The four templates (3) are respectively two mutually parallel plates 1 (31) and two mutually parallel plates 2 (32). The plates 1 (31) and the plates 2 (32) are arranged perpendicular to each other. The width of the plates 1 (31) is the same as the width of the concrete base plate (1), and the width of the plates 2 (32) is greater than the width of the concrete base plate (1).

4. The vibrator base structure for a large scientific device according to claim 2, characterized in that: The mounting frame (21) comprises a mounting plate (22), two mutually perpendicular bidirectional screw rods (23) are inserted into the mounting plate (22), the bidirectional screw rod (23) is rotatably connected to the mounting plate (22), two ends of the bidirectional screw rod (23) are respectively fixed with fixing blocks (43), a guide rod (24) is fixed between the two fixing blocks (43), the guide rod (24) passes through the template (3), the two bidirectional screw rods (23) are respectively screw rod 1 (231) and screw rod 2 (232), the plate 1 (31) is sleeved on the outer periphery of the screw rod 1 (231), the plate 1 (31) and the screw rod 1 (231) are threadedly matched, the plate 2 (32) is sleeved on the outer periphery of the screw rod 2 (232), the plate 2 (32) and the screw rod 2 (232) are threadedly matched.

5. The vibrator base structure for a large scientific device according to claim 3, characterized in that: The template (3) is provided with a positioning groove (34) on the side close to the concrete base plate (1), and the template (3) is slidably installed with a positioning block (33) along its own thickness direction through the positioning groove (34), and the bottom surface of the positioning block (33) can be fitted with the top surface of the concrete base plate (1), and a sliding block (35) is fixed on the side of the positioning block (33), and a sliding groove (36) is provided on the inner wall of the positioning groove (34), and the sliding block (35) is slidably matched with the template (3) along the thickness direction of the template (3) through the sliding groove (36), and a sliding spring (37) is fixed on the side of the sliding block (35) away from the concrete base plate (1), and one end of the sliding spring (37) away from the sliding block (35) is fixedly connected to the inner wall of the sliding groove (36).

6. The vibrator base structure for a large scientific device according to claim 4, characterized in that: A through hole (41) connected to the positioning groove (34) is provided on the side of the template (3) away from the concrete base plate (1); a connecting rod (4) is inserted into the through hole (41); the connecting rod (4) is rotatably connected to the positioning block (33); a clamping block (42) is installed at the end of the connecting rod (4) away from the positioning block (33); a fixing block (43) is fixed on the side of the template (3) away from the concrete base plate (1); and a clamping groove (44) for accommodating the clamping block (42) is provided on the side of the fixing block (43) away from the template (3).

7. The vibrator base structure for a large scientific device according to claim 3, characterized in that: The two plates (31) are provided with sliding grooves (51) on their opposite inner sides, and the plates (31) are provided with sliding blocks (52) for sliding along their length direction through the sliding grooves (51). A sliding plate (53) is fixed between the two sliding blocks (52), and a scraper (5) is installed at the bottom of the sliding plate (53). An adjusting member for adjusting the height of the scraper (5) is provided on the sliding plate (53).

8. The vibrator base structure for a large scientific device according to claim 6, characterized in that: The adjusting member comprises an adjusting screw (54) passing through the sliding plate (53), the adjusting screw (54) being threadedly matched with the sliding plate (53), the bottom end of the adjusting screw (54) being rotatably connected with the top surface of the scraper (5), an adjusting rod (55) being fixed to the bottom surface of the sliding plate (53), and an adjusting hole (56) for inserting the adjusting rod (55) being provided on the top surface of the scraper (5).

9. The vibrator base structure for a large scientific device according to claim 7, characterized in that: The plate 2 (32) comprises a body (321), a movable groove (323) is provided on the bottom surface of the body (321), a movable plate (322) is installed on the body (321) through the movable groove (323) in a vertical sliding manner, a clearance block (324) is fixed on both sides of the movable plate (322), a clearance groove (325) is provided on the inner wall of the movable groove (323), the clearance block (324) is vertically slidably matched with the body (321) through the clearance groove (325), a control screw (326) is rotatably installed on the bottom of the body (321), and the control screw (326) is threadedly matched with one of the clearance blocks (324).

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