Bridge foundation rock stratum detection sampling device

Abstract

The application relates to the technical field of rock stratum sampling devices, in particular to a bridge foundation rock stratum detection sampling device; the device comprises a connecting frame, a main frame slidably connected with the connecting frame, a telescopic hydraulic cylinder arranged between the main frame and the connecting frame, a sampling frame slidably connected with the main frame, and a sampling rod rotatably connected with the sampling frame; the lower end of the main frame is rotatably connected with a sliding frame, the lower end of the sliding frame is slidably connected with a fixing frame, centering springs are arranged between the two ends of the sliding frame and the fixing frame, a stabilizing frame is slidably connected with the lower end of the fixing frame, and a plurality of fixing anchor rods are fixedly connected with the lower end of the fixing frame; the device effectively solves the problem that the existing rock stratum sampling device cannot be fully contacted with the ground, and the whole machine is vibrated, and the vibration is directly transmitted to the drill rod; the device is convenient for adjusting the angle of the main frame, keeping the main frame vertical, fixing the main frame, and reducing the vibration of the machine body and the drill rod when the drill rod rotates.

Description

Technical Field

[0001] This invention relates to the field of rock stratum sampling device technology, specifically to a rock stratum detection and sampling device for bridge foundations. Background Technology

[0002] During bridge foundation construction, it is necessary to sample and test the underlying rock strata at the pile foundation locations to obtain undisturbed rock core samples. This allows for the evaluation of the actual mechanical properties of the bearing stratum, providing a reliable basis for bridge foundation design and construction. The working environment at bridge construction sites is complex, often characterized by undulating terrain and uneven ground. Existing bridge foundation rock stratum testing and sampling equipment has a stable support structure at the lower end of its frame for securing the machine after placement. However, in uneven terrain, this stable structure cannot fully contact the ground, leaving some support points suspended and unable to form a stable and reliable grounding support.

[0003] During drilling operations, the machine frame may not fully contact the ground, causing overall machine vibration, which is directly transmitted to the drill rod. Simultaneously, uneven terrain can easily cause the machine to tilt, leading to a simultaneous tilt of the drill rod. With the drill rod tilted and vibrating, the vibration is continuously transmitted to the lower drill bit during rotary drilling. The drill bit creates reciprocating impacts and disturbances on the rock strata at the bottom of the hole, easily causing core fragmentation and cracking. For rock strata with well-developed joints and poor integrity, this significantly reduces the core recovery rate, damages the original core structure, and makes it difficult to obtain test samples that truly reflect the characteristics of the rock strata.

[0004] Drill rod deviation can also cause the core drilling trajectory to shift, resulting in the core sample axis being tilted. The obtained sample may not meet the requirements of rock mechanics testing specifications, which can easily lead to misjudgment of the bearing layer of the pile foundation and leave potential safety risks for the bridge foundation.

[0005] Therefore, the present invention provides a bridge foundation rock strata detection and sampling device to solve the above problems. Summary of the Invention

[0006] To address the above issues and overcome the shortcomings of existing technologies, this invention provides a bridge foundation rock stratum testing and sampling device. This device effectively solves the problems of existing rock stratum sampling devices, which suffer from vibration due to insufficient contact with the ground, directly transmitting this vibration to the drill rod. Furthermore, uneven terrain can easily cause the entire machine to tilt, leading to synchronous tilting of the drill rod, resulting in core fragmentation and cracking. For rock strata with well-developed joints and poor integrity, this significantly reduces the core recovery rate, damages the original core structure, and makes it difficult to obtain test samples that truly reflect the characteristics of the rock strata.

[0007] The solution to the technical problem of the present invention is as follows: a sampling device for detecting rock strata in bridge foundations, comprising a connecting frame and a main frame slidably connected to the connecting frame, a telescopic hydraulic cylinder being provided between the main frame and the connecting frame, a sampling frame being slidably connected to the main frame, a sampling rod being rotatably connected to the sampling frame, a circumferential drive device for controlling the rotation of the sampling rod being fixedly connected to the sampling frame, and an angle adjustment device for adjusting the angle of the main frame being connected to the connecting frame; The lower end of the main frame is rotatably connected to a sliding frame, and the lower end of the sliding frame is slidably connected to a fixed frame. A central spring is provided between both ends of the sliding frame and the fixed frame. The lower end of the fixed frame is slidably connected to a stabilizing frame, and the lower end of the fixed frame is fixedly connected to multiple fixed anchor rods. A compression spring is provided between the fixed frame and the stabilizing frame. The stabilizing frame has multiple through holes that cooperate with the fixed anchor rods.

[0008] Preferably, both the stabilizer and the fixing frame are configured as U-shaped structures with an opening on one side.

[0009] Preferably, the fixed anchor rod is hollow, a control rod is slidably connected inside the fixed anchor rod, and a return spring is provided between the control rod and the fixed anchor rod; The fixed anchor rod has multiple sliders on its sidewall. The sliders and the control rod are connected by a connecting rod. When the control rod slides up and down, it pushes the sliders to move closer to or further away from the control rod through the connecting rod. The control rod is equipped with a downward driving structure.

[0010] Preferably, the downward driving structure includes a driving ring fixedly connected to the upper end of the control lever.

[0011] Preferably, the slider has an isosceles trapezoidal cross-section, is vertically positioned, and has two inclined surfaces at its upper and lower ends.

[0012] Preferably, the lower end of the stabilizer is fixedly connected with a plurality of isosceles trapezoidal limiting blocks.

[0013] Preferably, the angle adjustment device includes an angle adjustment worm gear fixedly connected to the connecting frame; A mounting bracket is rotatably connected to the side of the connecting frame away from the main frame, and a drive worm gear that meshes with the angle adjusting worm wheel is rotatably connected to the side of the mounting bracket close to the connecting frame. A drive motor that meshes with the drive worm gear is fixedly connected to the mounting bracket.

[0014] Preferably, an angle sensor is fixedly installed on the upper end of the main frame.

[0015] Preferably, a locking disc is fixedly connected to the side of the mounting bracket near the connecting bracket; An arc-shaped locking plate that slidably connects to the main frame and cooperates with the locking disc is provided, and a locking spring connects the arc-shaped locking plate and the main frame.

[0016] Preferably, the locking disc has multiple toothed grooves, and the arc-shaped locking plate is fixedly connected with multiple locking teeth that cooperate with the toothed grooves.

[0017] The beneficial effects of this invention are as follows: This invention utilizes a connecting frame, main frame, telescopic hydraulic cylinder, sampling frame, sampling rod, sliding frame, fixed frame, centering spring, stabilizing frame, fixed anchor rod, compression spring, and through hole to control the stabilizing frame. After contacting the ground, the fixed frame is pushed downwards to insert the fixed anchor rod into the ground, thereby fixing the stabilizing frame and the main frame, preventing vibration. This solves the problem of whole-machine vibration caused by insufficient contact between the frame and the ground, which is directly transmitted to the drill rod.

[0018] By adding control levers, return springs, sliders, and connecting rods, the slider on the fixed anchor bolt inserted into the ground can be opened, thereby opening the slider away from the fixed anchor bolt, thus improving the stability of the fixed anchor bolt and further improving the stability of the frame.

[0019] The tilt angle of the main frame is adjusted by adding an angle-adjusting worm gear, mounting bracket, drive worm, and drive motor, so that the main frame remains vertical.

[0020] The mounting bracket and main unit frame are further secured by adding a locking disc, an arc-shaped locking plate, a locking spring, a toothed groove, and a locking tooth, thus maintaining the stability of the main unit frame.

[0021] This invention facilitates the adjustment of the main frame angle, keeping the main frame vertical, and also facilitates the fixing of the main frame, reducing the vibration generated by the drill body and drill rod when the drill rod rotates. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall assembly of the present invention; Figure 2 This is a schematic diagram of the installation position of the limiting block of the present invention; Figure 3 This is a cross-sectional view of the slider in its initial state according to the present invention; Figure 4 This is the present invention. Figure 3Enlarged view of a portion of point A in the middle; Figure 5 This is a cross-sectional view of the slider in use according to the present invention; Figure 6 This is the present invention. Figure 5 Enlarged view of a portion of point B in the middle; Figure 7 This is a schematic diagram of the installation position of the drive worm gear of the present invention; Figure 8 This is a schematic diagram of the arc-shaped locking plate and locking disc of the present invention.

[0024] In the diagram, 1. Connecting frame; 2. Main frame; 3. Telescopic hydraulic cylinder; 4. Sampling frame; 5. Sampling rod; 6. Sliding frame; 7. Fixed frame; 8. Centering spring; 9. Stabilizing frame; 10. Fixed anchor rod; 11. Compression spring; 13. Control rod; 14. Return spring; 15. Slider; 16. Connecting rod; 17. Drive ring; 18. Limit block; 19. Angle adjusting worm gear; 20. Mounting frame; 21. Drive worm; 22. Drive motor; 23. Locking disc; 24. Arc-shaped locking plate; 25. Locking spring; 26. Tooth groove; 27. Clamping tooth. Detailed Implementation

[0025] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0026] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that the following description covers various aspects of embodiments within the scope of the appended claims. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this invention, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any of the aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0028] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the shape, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0029] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0030] Refer to the instruction manual appendix Figures 1-8 A sampling device for detecting rock strata in bridge foundations includes a connecting frame 1 and a main frame 2 slidably connected to the connecting frame 1. A telescopic hydraulic cylinder 3 is provided between the main frame 2 and the connecting frame 1. In use, the telescopic hydraulic cylinder 3 controls the up and down movement of the main frame 2. A sampling frame 4 is slidably connected to the main frame 2. A sampling hydraulic cylinder is installed on the main frame 2. The extended end of the sampling hydraulic cylinder is fixedly connected to the sampling frame 4. A sampling rod 5 is rotatably connected to the sampling frame 4. A circumferential drive device for controlling the rotation of the sampling rod 5 is fixedly connected to the sampling frame 4. The circumferential drive device is a drive motor. The drive motor drives the sampling rod 5 to rotate. In use, the sampling hydraulic cylinder pushes the sampling frame 4 downward, while the sampling rod 5 rotates to perform sampling.

[0031] An angle sensor is fixedly installed on the upper part of the main frame 2.

[0032] The connecting frame 1 is connected to an angle adjustment device for adjusting the angle of the main frame 2; The angle adjustment device includes an angle adjustment worm gear 19 fixedly connected to the connecting frame 1; A mounting bracket 20 is rotatably connected to the side of the connecting frame 1 away from the main frame 2. A drive worm 21 that meshes with the angle adjusting worm gear 19 is rotatably connected to the side of the mounting bracket 20 close to the connecting frame 1. A drive motor 22 that meshes with the drive worm 21 is fixedly connected to the mounting bracket 20.

[0033] In use, the mounting frame 20 is hinged to the core sampling vehicle. An angle adjustment hydraulic cylinder is connected between the core sampling vehicle and the main frame 2. After the angle sensor detects the tilt state of the main frame 2, the drive motor 22 rotates and drives the drive worm 21 to rotate. The drive worm 21 drives the angle adjustment worm wheel 19 to rotate, thereby controlling the main frame 2 to rotate left and right by a certain angle. The angle adjustment hydraulic cylinder pushes the main frame 2 to swing back and forth by an angle, so that the connecting frame 1 returns to the vertical state.

[0034] A locking disc 23 is fixedly connected to the side of the mounting bracket 20 near the connecting bracket 1; An arc-shaped locking plate 24 that cooperates with the locking disc 23 is slidably connected to the main frame 2. The main frame 2 has a sliding groove, and the arc-shaped locking plate 24 is slidably connected inside the sliding groove, thereby preventing the arc-shaped locking plate 24 from shaking on the main frame 2. The arc-shaped locking plate 24 can only slide up and down. A locking spring 25 is connected between the arc-shaped locking plate 24 and the main frame 2.

[0035] The locking disc 23 has multiple grooves 26, and the arc-shaped locking plate 24 has multiple locking teeth 27 that cooperate with the grooves 26.

[0036] In the initial state, the arc-shaped locking plate 24 is pushed upward a certain distance by the locking spring 25; In use, when the telescopic hydraulic cylinder 3 drives the main frame 2 to move downward until the locking disc 23 and the arc-shaped locking plate 24 are in contact, the locking teeth 27 are inserted into the tooth groove 26, thereby further fixing the locking disc 23 and preventing the locking disc 23 from rotating. At the same time, it prevents the main frame 2 and the mounting bracket 20 from rotating relative to each other, reducing vibration. Then the main frame 2 continues to move downward, and the locking disc 23 pushes the arc-shaped locking plate 24 to move downward to compress the locking spring 25.

[0037] A sliding frame 6 is rotatably connected to the lower end of the main frame 2. A fixed frame 7 is slidably connected to the lower end of the sliding frame 6. A central spring 8 is provided between both ends of the sliding frame 6 and the fixed frame 7. The central spring 8 pushes the sliding frame 6 to slide to the center position of the fixed frame 7. A stabilizing frame 9 is slidably connected to the lower end of the fixed frame 7. Multiple fixed anchor rods 10 are fixedly connected to the lower end of the fixed frame 7. A compression spring 11 is provided between the fixed frame 7 and the stabilizing frame 9. Multiple through holes that cooperate with the fixed anchor rods 10 are opened on the stabilizing frame 9.

[0038] A limit switch is installed between the fixed frame 7 and the stabilizer 9. When the fixed frame 7 and the stabilizer 9 come into contact, the telescopic hydraulic cylinder 3 stops.

[0039] Both the stabilizer 9 and the fixing frame 7 are U-shaped structures with an opening on one side.

[0040] The fixed anchor rod 10 is hollow, and a control rod 13 is slidably connected inside the fixed anchor rod 10. A return spring 14 is provided between the control rod 13 and the fixed anchor rod 10. In the initial state, the control rod 13 is pulled downward by the action of the return spring 14, and the slider 15 is pulled towards the control rod 13 through the connecting rod 16, so as not to affect the up and down sliding of the fixed anchor rod 10 inside the through hole.

[0041] The fixed anchor rod 10 has multiple sliders 15 on its side wall. The sliders 15 and the control rod 13 are connected by a connecting rod 16. When the control rod 13 slides up and down, the connecting rod 16 pushes the sliders 15 to move closer to or away from the control rod 13. The control rod 13 is provided with a downward driving structure.

[0042] The downward drive structure includes a drive ring 17 fixedly connected to the upper end of the control lever 13.

[0043] The cross-section of slider 15 is set as an isosceles trapezoid. Slider 15 is set vertically, and the two inclined surfaces of slider 15 are set at the upper and lower ends of slider 15. This setting does not affect the vertical movement of slider 15 inside the through hole, and at the same time guides slider 15 to prevent soil from getting stuck at both ends of slider 15, which would make it difficult to pull the fixed anchor rod 10 out of the soil.

[0044] Multiple isosceles trapezoidal limiting blocks 18 are fixedly connected to the lower end of the stabilizer 9. After the limiting blocks 18 come into contact with the ground, they are pressed into the ground to further fix the stabilizer 9.

[0045] In use, when the ground is tilted, after the main frame 2 swings to a vertical position, the telescopic hydraulic cylinder 3 controls the main frame 2 to move downward until the limit block 18 at the lower end of the stabilizer 9 contacts the tilted ground. The stabilizer 9 then swings at a certain angle and continues to push the main frame 2 downward. The sliding frame 6 slides inside the fixed frame 7, thus not affecting the main frame 2's continued downward movement of the sliding frame 6. The sliding frame 6 compresses the spring 11 towards the stabilizer 9, thereby inserting the fixed anchor rod 10 into the soil. When the drive ring 17 contacts the stabilizer 9, it continues to push the fixed frame 7 towards the stabilizer 9. The drive ring 17 drives the control rod 13 to move upward, stretching the reset spring 14. Under the action of the connecting rod 16, the slider 15 moves away from the control rod 13, thus pushing the soil inside the ground layer to both sides. The telescopic hydraulic cylinder 3 limits the height of the main frame 2, and the slider 15 firmly restricts the fixed anchor rod 10 to its current position. At this time, the fixed frame 7 and the stabilizer 9 contact, and the telescopic hydraulic cylinder 3 stops.

[0046] After use, the telescopic hydraulic cylinder 3 drives the main frame 2 to move upward. At this time, under the action of the return spring 14, the slider 15 is controlled to move towards the control rod 13. At the same time, the soil pushes the slider 15 to move towards the inside of the control rod 13 until the main frame 2 moves upward to the initial position.

[0047] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A sampling device for detecting rock strata in bridge foundations, comprising a connecting frame (1) and a main frame (2) slidably connected to the connecting frame (1), wherein a telescopic hydraulic cylinder (3) is provided between the main frame (2) and the connecting frame (1), a sampling frame (4) is slidably connected to the main frame (2), a sampling rod (5) is rotatably connected to the sampling frame (4), and a circumferential drive device for controlling the rotation of the sampling rod (5) is fixedly connected to the sampling frame (4), characterized in that, An angle adjustment device for adjusting the angle of the main frame (2) is connected to the connecting frame (1); The lower end of the main frame (2) is rotatably connected to a sliding frame (6), and the lower end of the sliding frame (6) is slidably connected to a fixed frame (7). A centering spring (8) is provided between both ends of the sliding frame (6) and the fixed frame (7). The lower end of the fixed frame (7) is slidably connected to a stabilizing frame (9). The lower end of the fixed frame (7) is fixedly connected to multiple fixed anchor rods (10). A compression spring (11) is provided between the fixed frame (7) and the stabilizing frame (9). The stabilizing frame (9) has multiple through holes that cooperate with the fixed anchor rods (10).

2. The bridge foundation rock strata detection and sampling device according to claim 1, characterized in that, Both the stabilizer (9) and the fixing frame (7) are configured as U-shaped structures with an opening on one side.

3. The bridge foundation rock strata detection and sampling device according to claim 2, characterized in that, The fixed anchor rod (10) is hollow, and a control rod (13) is slidably connected inside the fixed anchor rod (10). A return spring (14) is provided between the control rod (13) and the fixed anchor rod (10). The fixed anchor rod (10) has multiple sliders (15) on its side wall. The sliders (15) and the control rod (13) are connected by a connecting rod (16). When the control rod (13) slides up and down, the connecting rod (16) pushes the sliders (15) to move closer to or further away from the control rod (13). The control rod (13) is provided with a downward driving structure.

4. The bridge foundation rock strata detection and sampling device according to claim 3, characterized in that, The downward drive structure includes a drive ring (17) fixedly connected to the upper end of the control rod (13).

5. The bridge foundation rock strata detection and sampling device according to claim 3, characterized in that, The slider (15) has an isosceles trapezoidal cross section, the slider (15) is vertically arranged, and the two inclined surfaces of the slider (15) are arranged at the upper and lower ends of the slider (15).

6. The bridge foundation rock strata detection and sampling device according to claim 1, characterized in that, The lower end of the stabilizer (9) is fixedly connected to a plurality of isosceles trapezoidal limiting blocks (18).

7. The bridge foundation rock strata detection and sampling device according to claim 1, characterized in that, The angle adjustment device includes an angle adjustment worm gear (19) fixedly connected to the connecting frame (1); The mounting bracket (20) is rotatably connected to the side of the connecting frame (1) away from the main frame (2). The mounting bracket (20) is rotatably connected to the side of the connecting frame (1) that meshes with the angle adjusting worm gear (19). The mounting bracket (20) is fixedly connected to the drive motor (22) that meshes with the drive worm gear (21).

8. The bridge foundation rock strata detection and sampling device according to claim 7, characterized in that, An angle sensor is fixedly installed on the upper end of the main frame (2).

9. A bridge foundation rock strata detection and sampling device according to claim 7, characterized in that, A locking disc (23) is fixedly connected to the side of the mounting bracket (20) near the connecting bracket (1). An arc-shaped locking plate (24) that cooperates with the locking disc (23) is slidably connected on the main frame (2), and a locking spring (25) is connected between the arc-shaped locking plate (24) and the main frame (2).

10. A bridge foundation rock strata detection and sampling device according to claim 9, characterized in that, The locking disc (23) has multiple toothed grooves (26), and the arc-shaped locking plate (24) has multiple locking teeth (27) that cooperate with the toothed grooves (26).

Images