A strength detection device for a building structure

Abstract

The present invention relates to the technical field of sampling, and particularly to a strength detection device for a building structure, which includes a support cylinder and a drilling cylinder. The drilling cylinder is rotatably arranged in the support cylinder and can move up and down relative to the support cylinder, and the drilling cylinder and the support cylinder move downward alternately; a piston plate is slidably arranged in the drilling cylinder, a liquid storage cavity is formed above the piston plate, a first one-way valve is arranged on the piston plate, a sewage discharge channel is formed between the inner wall of the support cylinder and the outer wall of the drilling cylinder, the lower end of the sewage discharge channel faces the drill teeth, a second one-way valve is arranged at the lower end of the sewage discharge channel, and a sewage discharge pipe is arranged at the upper end. When the drilling cylinder moves downward, the piston plate is pushed upward by the sample core, and the first one-way valve is opened, so that the liquid in the liquid storage cavity flows along the side wall of the sample core to the periphery of the drill teeth. When the support cylinder moves downward, the second one-way valve is opened, and the liquid flowing from the liquid storage cavity to the periphery of the drill teeth carries the drill chips into the sewage discharge channel. The present invention solves the technical problems that the drilling tool is prone to tilt during sampling and the sample core is damaged due to the inability to efficiently discharge the chips.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling, and in particular to a strength detection device for building structures. Background Art

[0002] In order to ensure the strength of building structures, it is necessary to extract a part of the concrete or rock core samples from the building structures, and then test the compressive strength, tensile strength, flexural strength, etc. of these core samples in the laboratory to detect whether the building structures meet the strength requirements.

[0003] A core drilling sampling device is a sampling device used to extract core samples from building structures and belongs to a strength detection device for building structures. The existing core drilling sampling devices usually use manual hand-held drilling tools for drilling. The hand-held drilling tools are prone to tilting, and as the drilling depth of the drilling tools increases, the degree of deviation of the drilling tools will increase. In addition, the existing core drilling sampling devices cannot achieve efficient chip removal, which will cause chip leakage between the core samples and the drill barrels, thereby damaging the surface of the extracted core samples and reducing the integrity of the core samples. Summary of the Invention

[0004] To overcome the deficiencies of the prior art, the present invention proposes a strength detection device for building structures to solve the technical problems of easy tilting of the drilling tools during sampling and damage to the core samples caused by inefficient chip removal in the prior art.

[0005] The strength detection device for building structures of the present invention adopts the following technical solutions:

[0006] A strength detection device for a building structure, comprising a support cylinder and a drilling cylinder with axes extending in the up and down directions. Both the drilling cylinder and the support cylinder are cylindrical structures with sealed upper ends and open lower ends. The drilling cylinder is rotatably arranged in the support cylinder and can move up and down relative to the support cylinder. The upper end of the support cylinder is connected with a handheld part. An installation cavity is provided at the upper end of the support cylinder. A first driving mechanism for driving the drilling cylinder to rotate is arranged in the installation cavity. Drill teeth are provided at the lower end of the drilling cylinder. When sampling a core, the drilling cylinder rotates and drills downward into the building structure body, and the drilling cylinder and the support cylinder move downward alternately. A piston plate is slidably arranged in the drilling cylinder and can move up and down in the drilling cylinder. A liquid storage cavity is formed above the piston plate in the drilling cylinder. A first liquid outlet is provided on the piston plate, and a first one-way valve is arranged at the first liquid outlet. A sewage discharge channel is formed between the inner wall of the support cylinder and the outer wall of the drilling cylinder. The lower end of the sewage discharge channel faces the drill teeth. A second one-way valve is arranged at the lower end of the sewage discharge channel, and a sewage discharge pipe is arranged at the upper end. During the core sampling process, when the drilling cylinder moves downward, the piston plate is pushed upward by the core sample, and the first one-way valve opens, enabling the liquid in the liquid storage cavity to flow along the side wall of the core sample to the periphery of the drill teeth. When the support cylinder moves downward, the second one-way valve opens, and the liquid flowing from the liquid storage cavity to the periphery of the drill teeth carries drill chips into the sewage discharge channel.

[0007] Further, a threaded connection column with an axis extending in the up and down directions is fixed at the top end of the drilling cylinder. A threaded through hole is provided at the bottom of the installation cavity. The threaded connection column is inserted into the threaded through hole. When the first driving mechanism drives the drilling cylinder to rotate, the drilling cylinder moves downward relative to the support cylinder.

[0008] Further, a liquid inlet channel is formed in the threaded connection column. The lower end of the liquid inlet channel is communicated with the liquid storage cavity, and the upper end is connected with a liquid inlet pipe.

[0009] Further, the first driving mechanism includes a first motor and a transmission gear. The upper end of the threaded connection column extends into the interior of the installation cavity. The transmission gear is connected with the upper end of the threaded connection column. The first motor has a first output shaft, and a first gear is connected to the first output shaft. The first gear is meshed with the transmission gear for transmission.

[0010] Further, spiral cutting edges are provided on the outer side wall of the drill teeth to form threaded holes in the building structure body. The upper end of the support cylinder is rotatably connected with the handheld part. A second driving mechanism for driving the support cylinder to rotate is arranged in the installation cavity. Threaded structures for cooperating with the threaded holes are provided on the side wall of the support cylinder.

[0011] Further, the second driving mechanism includes a second motor. The second motor has a second output shaft, and a second gear is connected to the second output shaft. An internal gear ring is provided on the inner wall of the installation cavity. The second gear is meshed with the internal gear ring for transmission.

[0012] Further, a return spring is connected between the upper side of the piston plate and the top wall of the drill barrel.

[0013] Further, support columns for supporting and cooperating with the top end of the sample core are provided on the lower side of the piston plate, so as to form a first chamber between the lower side of the piston plate and the top end of the sample core.

[0014] Further, the inner wall of the lower end of the drill barrel protrudes inward to form an annular inner step. The inner wall of the lower end of the drill barrel is used to fit with the outer wall of the sample core. When sampling the sample core, a second annular channel is formed between the drill barrel and the side wall of the sample core above the inner step. A plurality of inner through grooves extending along the up-down direction are provided on the inner step. The upper end of the inner through groove communicates with the second annular channel, and the lower end communicates with the space below the drill barrel.

[0015] Further, the outer wall of the lower end of the drill barrel protrudes outward to form an annular outer step. A plurality of outer through grooves extending along the up-down direction are provided on the outer step. The upper end of the outer through groove communicates with the space above the outer step, and the lower end communicates with the space below the drill barrel.

[0016] The beneficial effects of the present invention are as follows: For a strength detection device of a building structure of the present invention, by providing a drill barrel and a support barrel that alternately move downward for feeding, when the drill barrel drills downward, the support barrel supports it from the periphery of the drill barrel, making the drilling process more stable and not prone to deviation. At the same time, the present invention sets a liquid flow path in the drill barrel and the support barrel, and uses the alternating downward movement of the drill barrel and the support barrel to carry the liquid away from the drill tooth position with the drill cuttings, preventing the drill cuttings from damaging the surface of the sample core and improving the integrity of the sample core. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings. Those skilled in the art should understand that these drawings are not necessarily drawn to scale.

[0018] Figure 1 It is a schematic diagram of the state of a strength detection device of a building structure of the present invention when drilling into a building structure body in an embodiment;

[0019] Figure 2 It is an exploded view of a strength detection device of a building structure of the present invention in an embodiment and a building structure body;

[0020] Figure 3Schematic cross-sectional view of an embodiment of a strength detection device for a building structure according to the present invention, which is drilled into the building structure;

[0021] Figure 4 is Figure 3 Enlarged schematic view of part A in;

[0022] Figure 5 is Figure 3 Enlarged schematic view of part B in;

[0023] Figure 6 Partial schematic view of an embodiment of a strength detection device for a building structure according to the present invention;

[0024] Figure 7 Cross-sectional view of the drill cylinder in an embodiment of a strength detection device for a building structure according to the present invention;

[0025] Figure 8 Cross-sectional view of the support cylinder in an embodiment of a strength detection device for a building structure according to the present invention;

[0026] Figure 9 Three-dimensional schematic view of the handheld part in an embodiment of a strength detection device for a building structure according to the present invention;

[0027] Figure 10 Cross-sectional view of the piston plate and the return spring in an embodiment of a strength detection device for a building structure according to the present invention;

[0028] Figure 11 Enlarged schematic view of the drill teeth and the spiral cutting edges at the lower end of the drill cylinder in an embodiment of a strength detection device for a building structure according to the present invention;

[0029] In the figure: 100, building structure; 101, threaded hole; 102, sample core; 200, drill cylinder; 201, drill teeth; 202, inner through groove; 203, inner step; 204, outer through groove; 205, outer step; 206, transmission gear; 207, limit ring; 208, threaded connection column; 209, third one-way valve; 2010, spiral cutting edge; 300, support cylinder; 301, installation cavity; 302, threaded through hole; 303, internal gear ring; 304, sewage discharge pipe; 305, threaded structure; 306, ring platform; 307, second one-way valve; 400, piston plate; 401, support column; 402, first one-way valve; 403, return spring; 500, handheld part; 501, operation hole; 502, handle; 510, first motor; 520, second motor; 530, limit post; 600, sewage discharge channel; 601, first annular channel; 602, sewage storage cavity; 603, first chamber; 604, second annular channel; 605, annular cavity; 606, liquid storage cavity. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] An embodiment of a strength detection device for a building structure of the present invention is as Figures 1 to 11 shown. The strength detection device for the building structure includes a support cylinder 300 and a drill cylinder 200 whose axes extend in the up and down directions. Both the drill cylinder 200 and the support cylinder 300 are cylindrical structures with sealed upper ends and open lower ends. The drill cylinder 200 is rotatably arranged in the support cylinder 300, and the drill cylinder 200 can move up and down relative to the support cylinder 300. An installation cavity 301 is provided at the upper end of the support cylinder 300. A handheld part 500 is connected above the installation cavity 301 at the upper end of the support cylinder 300. The handheld part 500 forms an end cover that seals the upper end of the support cylinder 300. A handle 502 is provided on the handheld part 500. At the same time, operation holes 501 are respectively opened on the opposite sides of the handle 502 on the handheld part 500. The operation holes 501 are used to inspect the installation cavity 301.

[0032] A first driving mechanism for driving the drill cylinder 200 to rotate is provided in the installation cavity 301. Drill teeth 201 are provided at the lower end of the drill cylinder 200. The drill teeth 201 are located outside the support cylinder 300. When sampling the core 102, the drill cylinder 200 rotates and drills downward into the building structure 100. In this embodiment, the upper end of the support cylinder 300 is rotatably connected to the handheld part 500. A second driving mechanism for driving the support cylinder 300 to rotate is also provided in the installation cavity 301. When sampling the core 102, first, the first driving mechanism drives the drill cylinder 200 to rotate and drill downward into the building structure 100, and then the second driving mechanism drives the support cylinder 300 to rotate and move downward. The drill cylinder 200 and the support cylinder 300 rotate alternately, and the drill cylinder 200 and the support cylinder 300 move downward alternately.

[0033] In this embodiment, a threaded connection column 208 with an axis extending in the up and down direction is fixed at the top end of the drill pipe 200, a threaded through hole 302 is provided at the bottom of the installation cavity 301, and the threaded connection column 208 is inserted into the threaded through hole 302. The first driving mechanism includes a first motor 510 and a transmission gear 206. The upper end of the threaded connection column 208 extends into the interior of the installation cavity 301, and the transmission gear 206 is connected to the upper end of the threaded connection column 208. The first motor 510 has a first output shaft, and a first gear is connected to the first output shaft. The first gear meshes with the transmission gear 206 for transmission. When the first driving mechanism drives the drill pipe 200 to rotate, under the action of the threaded connection column 208 and the threaded through hole 302, the drill pipe 200 moves downward relative to the support cylinder 300. The second driving mechanism includes a second motor 520. The second motor 520 has a second output shaft, and a second gear is connected to the second output shaft. An internal gear ring 303 is provided on the inner wall of the installation cavity 301. The second gear meshes with the internal gear ring 303 for transmission. When the second driving mechanism drives the support cylinder 300 to rotate, the support cylinder 300 moves downward relative to the drill pipe 200.

[0034] In this embodiment, a limiting ring 207 is connected above the transmission gear 206 at the upper end of the threaded connection column 208. A ring groove is formed between the limiting ring 207 and the transmission gear 206. A limiting column 530 is connected at a position corresponding to the lower side of the handheld part 500 and the limiting ring 207 up and down. The limiting column 530 includes four hooks evenly spaced along the circumferential direction of the limiting ring 207. The upper end of each hook is connected to the handheld part 500, and the lower end is snapped into the ring groove between the limiting ring 207 and the transmission gear 206.

[0035] In this embodiment, a spiral cutting edge 2010 is provided on the outer side wall of the drill tooth 201. When the drill pipe 200 rotates to drill the building structure 100, the spiral cutting edge 2010 can form a threaded hole 101 in the building structure 100. A threaded structure 305 for cooperating with the threaded hole 101 is provided on the side wall of the support cylinder 300. When sampling the core 102, the drill pipe 200 and the support cylinder 300 rotate alternately. When the drill pipe 200 rotates and moves downward, the threaded structure 305 outside the support cylinder 300 cooperates with the threaded hole 101, thereby being able to play a limiting role on the support cylinder 300.

[0036] In the present invention, in order to timely discharge the drill cuttings generated at the position of the lower drill tooth 201, a piston plate 400 is slidably arranged in the drill cylinder 200, and the piston plate 400 can move up and down in the drill cylinder 200. A liquid storage cavity 606 is formed above the piston plate 400 in the drill cylinder 200. A liquid inlet channel is formed in the threaded connection column 208. The upper and lower ends of the liquid inlet channel penetrate through the threaded connection column 208. The lower end of the liquid inlet channel is communicated with the liquid storage cavity 606, and the upper end is connected with a liquid inlet pipe. Thus, the coolant can be introduced into the liquid storage cavity 606 through the liquid inlet pipe. A third one-way valve 209 is arranged at the lower end of the liquid inlet channel, and the third one-way valve 209 prevents the liquid in the liquid storage cavity 606 from flowing back into the liquid inlet channel. A first liquid outlet is arranged on the piston plate 400, and a first one-way valve 402 is arranged at the first liquid outlet. A sewage discharge channel 600 is formed between the inner wall of the support cylinder 300 and the outer wall of the drill cylinder 200. The lower end of the sewage discharge channel 600 faces the drill tooth 201. A second one-way valve 307 is arranged at the lower end of the sewage discharge channel 600, and a sewage discharge pipe 304 is arranged at the upper end. During the process of sampling the core 102, when the drill cylinder 200 moves downward, the piston plate 400 is pushed upward by the core 102, and the first one-way valve 402 is opened, so that the liquid in the liquid storage cavity 606 flows along the side wall of the core 102 to the periphery of the drill tooth 201. When the support cylinder 300 moves downward, the second one-way valve 307 is opened, and the liquid flowing from the liquid storage cavity 606 to the periphery of the drill tooth 201 carries the drill cuttings into the sewage discharge channel 600.

[0037] In this embodiment, the sewage discharge channel 600 includes a first annular channel 601 between the outer side wall of the drill cylinder 200 and the inner side wall of the support cylinder 300, and a sewage storage cavity 602 above the drill cylinder 200. The upper end of the first annular channel 601 is communicated with the sewage storage cavity 602, and the lower end is located above the drill tooth 201. A ring platform 306 is arranged on the inner wall at the lower end of the support cylinder 300. The ring platform 306 forms a sealing ring for sealing the lower end of the first annular channel 601. A second liquid inlet is formed on the ring platform 306, and the second one-way valve 307 is arranged in the second liquid inlet.

[0038] In this embodiment, a return spring 403 is connected between the upper side of the piston plate 400 and the top wall of the drill cylinder 200. In the initial state, the return spring 403 is in the original length, and the piston plate 400 is at the position farthest from the top of the drill cylinder 200. A support column 401 for supporting and cooperating with the top end of the core 102 is arranged on the lower side of the piston plate 400. When sampling the core 102, when the drill cylinder 200 moves downward, the support column 401 on the lower side of the piston plate 400 supports and cooperates with the top of the core 102, so that a first chamber 603 is formed between the lower side of the piston plate 400 and the top end of the core 102. When the first one-way valve 402 is opened, the liquid in the liquid storage cavity 606 can flow downward through the first chamber 603.

[0039] In this embodiment, the inner wall of the lower end of the drill tube 200 protrudes inward to form an annular inner step 203. The inner wall of the lower end of the drill tube 200 is used to fit against the outer wall of the sample core 102. When sampling the sample core 102, a second annular channel 604 is formed between the drill tube 200 and the side wall of the sample core 102 above the inner step 203. The upper end of the second annular channel 604 communicates with the first chamber 603. A plurality of inner through grooves 202 with axes extending in the up and down directions are formed on the inner step 203. The upper end of the inner through groove 202 communicates with the second annular channel 604, and the lower end communicates with the space below the drill tube 200. When the drill tube 200 moves downward, the top of the sample core 102 pushes the piston plate 400 upward, increasing the pressure in the liquid storage chamber 606, causing the first one-way valve 402 to open. The liquid in the liquid storage chamber 606 flows downward through the first chamber 603 and the second annular channel 604, and then enters below the drill teeth 201 through the inner through grooves 202.

[0040] In this embodiment, the outer wall of the lower end of the drill tube 200 protrudes outward to form an annular outer step 205. When the drill tube 200 drills into the building structure 100, an annular chamber 605 is formed between the upper part of the drill tube 200 outside the outer step 205 and the lower part of the support tube 300. A plurality of outer through grooves 204 with axes extending in the up and down directions are formed on the outer step 205. The upper end of the outer through groove 204 communicates with the annular chamber 605 above the outer step 205, and the lower end communicates with the space below the drill tube 200. When sampling the sample core 102, the liquid flowing below the drill teeth 201 can reach the periphery of the drill teeth 201 through the outer through grooves 204 and enter the annular chamber 605 above the drill teeth 201. After the drill tube 200 moves downward a certain distance, the drill tube 200 stops rotating, and the support tube 300 starts to rotate and move downward. When the support tube 300 moves downward, the pressure in the annular chamber 605 above the drill teeth 201 increases, causing the second one-way valve 307 to open, and the liquid in the annular chamber 605 to carry the drill cuttings into the sewage storage chamber 602 through the first annular channel 601. Finally, the liquid carrying the drill cuttings is discharged outward through the sewage discharge pipe 304.

[0041] The working process of the strength detection device for the building structure of the present invention is as follows: In the initial state, a certain amount of coolant is first introduced into the liquid storage cavity 606 through the liquid inlet pipe and the liquid inlet channel. Then, the lower end of the drill cylinder 200 is pressed against the building structure 100, and the first motor 510 is started to drive the drill cylinder 200 to rotate. The drill teeth 201 at the lower end of the drill cylinder 200 drill down the building structure 100. Under the cooperation of the threaded connection column 208 and the threaded through hole 302, the drill cylinder 200 will automatically drill downward during rotation, that is, the drill cylinder 200 moves downward while rotating. Since the spiral cutting edge 2010 is provided on the outer side of the drill teeth 201, a threaded hole 101 will be formed in the building structure 100. During the process of sampling the core 102 in the present invention, the drill cylinder 200 and the support cylinder 300 rotate alternately. When the drill cylinder 200 moves downward a certain distance, the drill cylinder 200 stops rotating, and the second motor 520 is started to drive the support cylinder 300 to start rotating. Due to the action of the threaded connection column 208 and the threaded through hole 302, the support cylinder 300 rotates and moves downward at the same time, realizing the alternate rotation and alternate downward movement of the drill cylinder 200 and the support cylinder 300.

[0042] In the present invention, during the process of the alternate rotation and downward movement of the drill cylinder 200 and the support cylinder 300, when the drill cylinder 200 drills downward, the piston plate 400 inside the drill cylinder 200 will contact and further push against the top of the core 102. When the piston plate 400 moves upward under the push of the top end of the core 102, the pressure in the liquid storage cavity 606 increases, causing the first one-way valve 402 on the piston plate 400 to open. The liquid in the liquid storage cavity 606 enters the first chamber 603 below the piston plate 400, and then enters below the drill teeth 201 through the second annular chamber 605 and the inner through groove 202, and then enters the annular chamber 605 above the drill teeth 201 through the outer through groove 204. In this way, during the process of the drill cylinder 200 drilling downward, the liquid can cool the drill teeth 201. At the same time, during the process of the drill cylinder 200 drilling downward, the support cylinder 300 is relatively fixed, and the drill cylinder 200 gradually extends out of the support cylinder 300, causing the annular chamber 605 above the drill teeth 201 to increase. In this way, a negative pressure will be formed in the annular chamber 605, which is beneficial for the liquid to enter the annular chamber 605 through the inner through groove 202 and the outer through groove 204. When the support cylinder 300 rotates and moves downward, the drill cylinder 200 is relatively fixed, and the drill cylinder 200 will gradually extend into the support cylinder 300. The annular chamber 605 above the drill teeth 201 decreases, the pressure increases, and the second one-way valve 307 opens. The liquid in the annular chamber 605 carries the drill chips and enters the first annular channel 601 of the sewage discharge channel 600 and the sewage storage cavity 602 in sequence through the second one-way valve 307, thereby realizing the timely discharge of the drill chips generated around the drill teeth 201 to the outside.

[0043] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An intensity detection device for a building structure, characterized in that, It includes a support cylinder (300) and a drill cylinder (200) with axes extending in the up and down directions. The lower end of the drill cylinder (200) is provided with drill teeth (201). A piston plate (400) is slidably arranged in the drill cylinder (200). A liquid storage chamber (606) is formed above the piston plate (400) in the drill cylinder (200). The piston plate (400) is provided with a first liquid outlet and a first one-way valve (402). A sewage discharge channel (600) is formed between the inner wall of the support cylinder (300) and the outer wall of the drill cylinder (200). The lower end of the sewage discharge channel (600) faces the drill teeth (201). A second one-way valve (307) is provided at the lower end of the sewage discharge channel (600). When sampling the core (102), the drill cylinder (200) and the support cylinder (300) move downward alternately. When the drill cylinder (200) moves downward, the piston plate (400) is pushed upward by the core (102), and the first one-way valve (402) opens, enabling the liquid in the liquid storage chamber (606) to flow along the side wall of the core (102) to the periphery of the drill teeth (201). When the support cylinder (300) moves downward, the second one-way valve (307) opens, and the liquid flowing from the liquid storage chamber (606) to the periphery of the drill teeth (201) carries drill cuttings into the sewage discharge channel (600). The drill cylinder (200) is rotatably arranged in the support cylinder (300). Both the drill cylinder (200) and the support cylinder (300) are of a cylindrical structure with a closed upper end and an open lower end. The upper end of the support cylinder (300) is connected with a handheld part (500). An installation cavity (301) is provided at the upper end of the support cylinder (300). A first driving mechanism for driving the drill cylinder (200) to rotate is arranged in the installation cavity (301). A threaded connection column (208) with an axis extending in the up and down directions is fixed at the top of the drill cylinder (200). A threaded through hole (302) is provided at the bottom of the installation cavity (301). The threaded connection column (208) is inserted into the threaded through hole (302). When the first driving mechanism drives the drill cylinder (200) to rotate, the drill cylinder (200) moves downward relative to the support cylinder (300). A spiral cutting edge (2010) is provided on the outer side wall of the drill teeth (201). The upper end of the support cylinder (300) is rotatably connected with the handheld part (500). A second driving mechanism for driving the support cylinder (300) to rotate is arranged in the installation cavity (301). A threaded structure (305) is provided on the side wall of the support cylinder (300).

2. The strength detection device for a building structure according to claim 1, wherein: A liquid inlet channel is formed in the threaded connection column (208). The lower end of the liquid inlet channel is communicated with the liquid storage chamber (606), and the upper end is connected with a liquid inlet pipe.

3. The strength detection device for a building structure according to claim 1, characterized in that: The first driving mechanism includes a first motor (510) and a transmission gear (206). The upper end of the threaded connection column (208) extends into the installation cavity (301). The transmission gear (206) is connected to the upper end of the threaded connection column (208). The first motor (510) has a first output shaft, and a first gear is connected to the first output shaft. The first gear meshes with the transmission gear (206) for transmission.

4. The strength detection device for a building structure according to claim 1, characterized in that: The second driving mechanism includes a second motor (520). The second motor (520) has a second output shaft, and a second gear is connected to the second output shaft. An internal gear ring (303) is provided on the inner wall of the installation cavity (301). The second gear meshes with the internal gear ring (303) for transmission.

5. The strength detection device for a building structure according to any one of claims 1-4, characterized in that: A return spring (403) is connected between the upper side of the piston plate (400) and the top wall of the drill pipe (200).

6. The strength detection device for a building structure according to claim 5, wherein: A support column (401) for supporting and cooperating with the top end of the sample core (102) is provided on the lower side of the piston plate (400), so as to form a first chamber (603) between the lower side of the piston plate (400) and the top end of the sample core (102).

7. The strength detection device for a building structure according to claim 4, characterized in that: The inner wall of the lower end of the drill pipe (200) protrudes inward to form an annular inner step (203). The inner wall of the lower end of the drill pipe (200) is used to fit with the outer wall of the sample core (102). When sampling the sample core (102), a second annular channel (604) is formed between the drill pipe (200) and the side wall of the sample core (102) above the inner step (203). A plurality of inner through grooves (202) with axes extending in the up and down directions are provided on the inner step (203). The upper end of the inner through groove (202) communicates with the second annular channel (604), and the lower end communicates with the space below the drill pipe (200).

8. The strength detection device for a building structure according to claim 7, characterized in that: The outer wall of the lower end of the drill pipe (200) protrudes outward to form an annular outer step (205). A plurality of outer through grooves (204) with axes extending in the up and down directions are provided on the outer step (205). The upper end of the outer through groove (204) communicates with the space above the outer step (205), and the lower end communicates with the space below the drill pipe (200).

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