Strength detection device for building structure

Abstract

The invention relates to the technical field of sampling, in particular to a building structure strength detection device which comprises a supporting cylinder and a drilling cylinder, the drilling cylinder is rotationally arranged in the supporting cylinder and can move up and down relative to the supporting cylinder, and the drilling cylinder and the supporting cylinder alternately move downwards; a piston plate is slidably arranged in the drilling barrel, a liquid storage cavity is formed in the upper side of the piston plate, a first one-way valve is arranged on the piston plate, a sewage discharging channel is formed between the inner wall of the supporting barrel and the outer wall of the drilling barrel, the lower end of the sewage discharging channel faces the drilling teeth, a second one-way valve is arranged at the lower end of the sewage discharging channel, and a sewage discharging pipe is arranged at the upper end of the sewage discharging channel. The piston plate is pushed by the sample core to move upwards, the first one-way valve is opened, so that liquid in the liquid storage cavity flows towards the periphery of the drill teeth along the side wall of the sample core, when the supporting cylinder moves downwards, the second one-way valve is opened, and the liquid flowing towards the periphery of the drill teeth from the liquid storage cavity carries drilling cuttings to enter the drainage channel. The technical problems that during sampling, a drilling tool is prone to inclining, and a sample core is damaged due to the fact that efficient chip removal cannot be achieved are solved.

Description

Technical Field

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

[0002] In order to ensure the strength of the building structure, it is necessary to extract a portion of concrete or rock core samples from the building structure, and then conduct compressive strength, tensile strength, flexural strength and other tests on these core samples in the laboratory to detect whether the building structure meets the strength requirements.

[0003] The core sampling device is a sampling device used to extract sample cores from building structures, and belongs to a building structure strength detection device. Existing core sampling devices usually use manual handheld drills for drilling, and the handheld drills are prone to tilting, and as the drilling depth of the drill increases, the degree of deflection of the drill increases; in addition, the existing core sampling device cannot achieve efficient chip removal, which will cause drilling chip leakage between the sample core and the drill barrel, thereby damaging the surface of the extracted sample core and reducing the integrity of the sample core. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention proposes a strength detection device for building structures to solve the technical problems in the prior art that the drill is easily tilted during sampling and the sample core is damaged due to the inability to efficiently remove chips.

[0005] A strength detection device for a building structure of the present invention adopts the following technical solution: A strength detection device for a building structure comprises a support tube and a drill tube whose axes extend in the up-down direction, the drill tube and the support tube are both tube-shaped structures with a sealed upper end and an open lower end, the drill tube is rotatably arranged in the support tube, and the drill tube can move up and down relative to the support tube, the upper end of the support tube is connected to a hand-held portion, the upper end of the support tube is provided with a mounting cavity, the mounting cavity is provided with a first driving mechanism for driving the drill tube to rotate, the lower end of the drill tube is provided with drill teeth, when sampling cores, the drill tube rotates and drills downwards to cut the building structure, the drill tube and the support tube move downwards alternately; a piston plate is slidably arranged in the drill tube, and the piston plate can move up and down in the drill tube The drill barrel is provided with a liquid storage chamber on the upper side of the piston plate, the piston plate is provided with a first liquid outlet, the first liquid outlet is provided with a first one-way valve, a sewage discharge channel is provided between the inner wall of the support tube and the outer wall of the drill barrel, the lower end of the sewage discharge channel faces the drill tooth, the lower end of the sewage discharge channel is provided with a second one-way valve, and the upper end is provided with a sewage discharge pipe. During the sampling core process, when the drill barrel moves downward, the piston plate is pushed upward by the sample core, the first one-way valve opens, and the liquid in the liquid storage chamber flows along the side wall of the sample core to the periphery of the drill tooth. When the support tube moves downward, the second one-way valve opens, and the liquid flowing from the liquid storage chamber to the periphery of the drill tooth carries the drill cuttings into the sewage discharge channel.

[0006] Furthermore, a threaded connection column with an axis extending in the up-down direction is fixed to the top of the drill barrel, and a threaded through hole is provided at the bottom of the installation cavity. The threaded connection column is installed in the threaded through hole. When the first driving mechanism drives the drill barrel to rotate, the drill barrel moves downward relative to the support barrel.

[0007] Furthermore, a liquid inlet channel is provided 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 to a liquid inlet pipe.

[0008] Furthermore, the first driving mechanism includes a first motor and a transmission gear, the upper end of the threaded connecting column extends into the installation cavity, the transmission gear is connected to the upper end of the threaded connecting column, the first motor has a first output shaft, the first output shaft is connected to a first gear, and the first gear is meshed with the transmission gear for transmission.

[0009] Furthermore, a spiral cutting edge is provided on the outer wall of the drill tooth to form a threaded hole in the building structure, the upper end of the support tube is rotatably connected to the hand-held part, a second driving mechanism for driving the support tube to rotate is provided in the installation cavity, and a threaded structure for cooperating with the threaded hole is provided on the side wall of the support tube.

[0010] Furthermore, the second driving mechanism includes a second motor having a second output shaft, the second output shaft is connected to a second gear, an inner gear ring is provided on the inner wall of the mounting cavity, and the second gear meshes with the inner gear ring for transmission.

[0011] Furthermore, a return spring is connected between the upper side of the piston plate and the top wall of the drill tube.

[0012] Furthermore, a support column for cooperating with the top support of the sample core is provided on the lower side of the piston plate, so that a first chamber is formed between the lower side of the piston plate and the top of the sample core.

[0013] Furthermore, the inner wall of the lower end of the drill barrel protrudes inward to form an annular inner step, and the inner wall of the lower end of the drill barrel is used to fit with the outer wall of the sample core. When taking 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. The inner step is provided with a plurality of inner through grooves whose axes extend in the up-and-down directions. The upper end of the inner through groove is connected to the second annular channel, and the lower end is connected to the lower space of the drill barrel.

[0014] Furthermore, the outer wall of the lower end of the drill barrel protrudes outward to form an annular outer step, and the outer step is provided with multiple outer through grooves with axes extending in the up and down directions. The upper end of the outer through groove is connected to the upper space of the outer step, and the lower end is connected to the lower space of the drill barrel.

[0015] The beneficial effects of the present invention are as follows: the strength detection device of a building structure of the present invention provides a drill tube and a support tube that alternately move downwards and feed, and when the drill tube drills downwards, the support tube supports it from the periphery of the drill tube, so that the drilling process is more stable and less prone to deflection. At the same time, the present invention provides a liquid flow path in the drill tube and the support tube, and uses the drill tube and the support tube to alternately move downwards, so that the liquid carries the drill cuttings away from the drill tooth position, prevents the drill cuttings from damaging the surface of the sample core, and improves the integrity of the sample core. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work. Those skilled in the art should understand that these drawings are not necessarily drawn to scale.

[0017] Figure 1 A schematic diagram of a state in which an embodiment of a strength detection device for a building structure of the present invention is drilled into a building structure; Figure 2 An embodiment of a strength detection device for a building structure of the present invention and an explosion schematic diagram of a building structure; Figure 3 A schematic cross-sectional view of an embodiment of a strength detection device for a building structure according to the present invention drilling into a building structure; Figure 4 for Figure 3 A magnified schematic diagram of the local A in the middle; Figure 5 for Figure 3 A magnified schematic diagram of the part B in the middle; Figure 6 It is a partial schematic diagram of an embodiment of a strength detection device for a building structure of the present invention; Figure 7 A cross-sectional view of a drill tube in one embodiment of a strength detection device for a building structure of the present invention; Figure 8 A cross-sectional view of a support tube in one embodiment of a strength detection device for a building structure of the present invention; Fig. 9 It is a three-dimensional schematic diagram of a handheld portion of an embodiment of a strength detection device for a building structure of the present invention; Fig.10 A cross-sectional view of a piston plate and a return spring in one embodiment of a strength detection device for a building structure of the present invention; Fig.11It is an enlarged schematic diagram of the drill teeth and spiral cutting edge at the lower end of the drill tube in one embodiment of a strength detection device for a building structure of the present invention; In the figure: 100, building structure; 101, threaded hole; 102, sample core; 200, drill tube; 201, drill teeth; 202, inner groove; 203, inner step; 204, outer 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 tube; 301, installation cavity; 302, threaded through hole; 303, inner gear ring; 304, sewage pipe; 305, thread Structure; 306, annular platform; 307, second one-way valve; 400, piston plate; 401, support column; 402, first one-way valve; 403, return spring; 500, hand-held part; 501, operating hole; 502, handle; 510, first motor; 520, second motor; 530, limit column; 600, sewage discharge channel; 601, first annular channel; 602, sewage storage chamber; 603, first chamber; 604, second annular channel; 605, annular chamber; 606, liquid storage chamber. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] An embodiment of a strength detection device for a building structure of the present invention is as follows: Figures 1 to 11 As shown, the strength detection device of the building structure comprises a support tube 300 and a drill tube 200 whose axes extend in the up-down direction. Both the drill tube 200 and the support tube 300 are tube-shaped structures with a sealed upper end and an open lower end. The drill tube 200 is rotatably arranged in the support tube 300, and the drill tube 200 can move up and down relative to the support tube 300. The upper end of the support tube 300 is provided with a mounting cavity 301, and the upper end of the support tube 300 is connected with a hand-held part 500 above the mounting cavity 301. The hand-held part 500 forms an end cover for blocking the upper end of the support tube 300. The hand-held part 500 has a handle 502, and the hand-held part 500 is provided with operation holes 501 on opposite sides of the handle 502, respectively, and the operation holes 501 are used to inspect the mounting cavity 301.

[0020] The installation cavity 301 is provided with a first driving mechanism for driving the drill tube 200 to rotate. The lower end of the drill tube 200 is provided with a drill tooth 201, and the drill tooth 201 is located outside the support tube 300. When sampling the core 102, the drill tube 200 rotates and drills downwards to cut the building structure 100. In this embodiment, the upper end of the support tube 300 is rotatably connected to the handheld part 500, and the installation cavity 301 is also provided with a second driving mechanism for driving the support tube 300 to rotate. When sampling the core 102, the first driving mechanism drives the drill tube 200 to rotate and drill downwards to cut the building structure 100, and then the second driving mechanism drives the support tube 300 to rotate and move downwards. The drill tube 200 and the support tube 300 rotate alternately, and the drill tube 200 and the support tube 300 move downward alternately.

[0021] In this embodiment, a threaded connection column 208 with an axis extending in the up-down direction is fixed to the top of the drill tube 200, and a threaded through hole 302 is provided at the bottom of the installation cavity 301, and the threaded connection column 208 is installed in 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 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 the first output shaft is connected to a first gear, and the first gear is meshed with the transmission gear 206 for transmission. When the first driving mechanism drives the drill tube 200 to rotate, under the action of the threaded connection column 208 and the threaded through hole 302, the drill tube 200 moves downward relative to the support tube 300. The second driving mechanism includes a second motor 520, the second motor 520 has a second output shaft, and the second output shaft is connected to a second gear. An inner ring gear 303 is provided on the inner wall of the mounting cavity 301, and the second gear is meshed with the inner ring gear 303 for transmission. When the second driving mechanism drives the support tube 300 to rotate, the support tube 300 moves downward relative to the drill tube 200.

[0022] In this embodiment, the upper end of the threaded connecting column 208 is connected to the limiting ring 207 above the transmission gear 206, and an annular groove is formed between the limiting ring 207 and the transmission gear 206. The lower side of the hand-held part 500 is connected to the limiting column 530 at the corresponding positions above and below the limiting ring 207. The limiting column 530 includes four hooks evenly spaced along the circumference of the limiting ring 207. The upper end of each hook is connected to the hand-held part 500, and the lower end is inserted into the annular groove between the limiting ring 207 and the transmission gear 206.

[0023] In this embodiment, a spiral cutting edge 2010 is provided on the outer wall of the drill tooth 201. When the drill barrel 200 rotates to drill and cut 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 tube 300. When sampling the core 102, the drill barrel 200 and the support tube 300 rotate alternately. When the drill barrel 200 rotates and moves downward, the threaded structure 305 outside the support tube 300 cooperates with the threaded hole 101 and can limit the support tube 300.

[0024] In the present invention, in order to discharge the drill cuttings generated at the position of the lower drill teeth 201 in time, a piston plate 400 is slidably provided in the drill tube 200, and the piston plate 400 can move up and down in the drill tube 200. The drill tube 200 has a liquid storage chamber 606 on the upper side of the piston plate 400, and a liquid inlet channel is provided in the threaded connection column 208. The upper and lower ends of the liquid inlet channel pass through the threaded connection column 208. The lower end of the liquid inlet channel is connected to the liquid storage chamber 606, and the upper end is connected to a liquid inlet pipe, and then the coolant can be introduced into the liquid storage chamber 606 through the liquid inlet pipe. The lower end of the liquid inlet channel is provided with a third one-way valve 209, and the third one-way valve 209 prevents the liquid in the liquid storage chamber 606 from entering the liquid inlet channel in reverse. The piston plate 400 is provided with a first liquid outlet, and the first liquid outlet is provided with a first one-way valve 402. A sewage channel 600 is provided between the inner wall of the support tube 300 and the outer wall of the drill tube 200, and the lower end of the sewage channel 600 faces the drill tooth 201. A second one-way valve 307 is provided at the lower end of the sewage channel 600, and a sewage pipe 304 is provided at the upper end. During the sampling core 102, when the drill tube 200 moves downward, the piston plate 400 is pushed upward by the sample core 102, and the first one-way valve 402 opens, so that the liquid in the liquid storage chamber 606 flows along the side wall of the sample core 102 to the periphery of the drill tooth 201. When the support tube 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 tooth 201 carries the drill cuttings into the sewage channel 600.

[0025] In this embodiment, the sewage discharge channel 600 includes a first annular channel 601 located between the outer wall of the drill tube 200 and the inner wall of the support tube 300, and a sewage storage chamber 602 located above the drill tube 200. The upper end of the first annular channel 601 is connected to the sewage storage chamber 602, and the lower end is located above the drill teeth 201. An annular platform 306 is provided on the inner wall of the lower end of the support tube 300, and the annular platform 306 forms a blocking ring for blocking the lower end of the first annular channel 601. A second liquid inlet is opened on the annular platform 306, and the second one-way valve 307 is arranged in the second liquid inlet.

[0026] 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 tube 200. In the initial state, the return spring 403 is at its original length, and the piston plate 400 is at the farthest position from the top of the drill tube 200. The lower side of the piston plate 400 is provided with a support column 401 for cooperating with the top support of the sample core 102. When sampling the core 102, when the drill tube 200 moves downward, the support column 401 on the lower side of the piston plate 400 cooperates with the top support of the sample core 102, so that a first chamber 603 is formed between the lower side of the piston plate 400 and the top of the sample core 102. When the first one-way valve 402 is opened, the liquid in the liquid storage chamber 606 can flow downward through the first chamber 603.

[0027] In this embodiment, the inner wall of the lower end of the drill tube 200 protrudes inward to form an annular inner step 203, and the inner wall of the lower end of the drill tube 200 is used to fit with the outer wall of the sample core 102. When sampling the 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, and the upper end of the second annular channel 604 is connected to the first chamber 603. The inner step 203 is provided with a plurality of inner through grooves 202 whose axes extend in the up-down direction, and the upper end of the inner through grooves 202 is connected to the second annular channel 604, and the lower end is connected to 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, and the liquid in the liquid storage chamber 606 flows downward through the first chamber 603 and the second annular channel 604, and then enters the bottom of the drill tooth 201 through the inner groove 202.

[0028] 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 is drilled into the building structure 100, an annular chamber 605 is formed between the outer step 205 and the support tube 300. The outer step 205 is provided with a plurality of outer through grooves 204 with axes extending in the up-down direction. The upper end of the outer through groove 204 is connected to the annular chamber 605 above the outer step 205, and the lower end is connected to the space below the drill tube 200. When sampling the core 102, the liquid flowing into the bottom of the drill tooth 201 can reach the periphery of the drill tooth 201 through the outer through groove 204 and enter the annular chamber 605 above the drill tooth 201. After the drill barrel 200 moves downward a certain distance, the drill barrel 200 stops rotating, and the support barrel 300 starts rotating and starts to move downward. When the support barrel 300 moves downward, the pressure in the annular chamber 605 above the drill tooth 201 increases, causing the second one-way valve 307 to open, allowing the liquid in the annular chamber 605 to carry the drill cuttings through the first annular channel 601 into the sewage storage chamber 602, and finally the liquid carrying the drill cuttings is discharged from the sewage pipe 304.

[0029] The working process of the strength detection device of 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 chamber 606 through the liquid inlet pipe and the liquid inlet channel, and then the lower end of the drill tube 200 is pressed against the building structure 100, and the first motor 510 is started to drive the drill tube 200 to rotate, and the drill teeth 201 at the lower end of the drill tube 200 drill downward to cut the building structure 100. With the cooperation of the threaded connection column 208 and the threaded through hole 302, the drill tube 200 will automatically drill downward during the rotation process, that is, the drill tube 200 moves downward while rotating. Since the outer side of the drill teeth 201 is provided with a spiral cutting edge 2010, a threaded hole 101 will be formed in the building structure 100. In the process of sampling the core 102 of the present invention, the drill barrel 200 and the support barrel 300 rotate alternately. When the drill barrel 200 moves downward a certain distance, the drill barrel 200 stops rotating, and the second motor 520 is started to drive the support barrel 300 to start rotating. Due to the action of the threaded connecting column 208 and the threaded through hole 302, the support barrel 300 rotates and moves downward at the same time, thereby realizing the drill barrel 200 and the support barrel 300 rotating alternately and moving downward alternately.

[0030] In the present invention, during the process of the drill barrel 200 and the support barrel 300 alternately rotating and moving downward, when the drill barrel 200 drills downward, the piston plate 400 inside the drill barrel 200 will contact the top of the sample core 102 and further push and cooperate. When the piston plate 400 is pushed upward by the top of the sample core 102, the pressure in the liquid storage chamber 606 increases, causing the first one-way valve 402 on the piston plate 400 to open, and the liquid in the liquid storage chamber 606 enters the first chamber 603 below the piston plate 400, and enters below the drill tooth 201 through the second annular chamber 605 and the inner through groove 202, and then enters the annular chamber 605 above the drill tooth 201 through the outer through groove 204. In this way, during the process of the drill barrel 200 drilling downward, the liquid can cool the drill tooth 201. Meanwhile, during the downward drilling process of the drill tube 200, the support tube 300 is relatively fixed, and the drill tube 200 gradually extends out of the support tube 300, so that the annular chamber 605 above the drill tooth 201 is enlarged, so that negative pressure is formed in the annular chamber 605, which is conducive to the liquid entering the annular chamber 605 through the inner groove 202 and the outer groove 204. When the support tube 300 rotates and moves downward, the drill tube 200 is relatively fixed, and the drill tube 200 gradually extends into the support tube 300, the annular chamber 605 above the drill tooth 201 is reduced, the pressure increases, the second one-way valve 307 opens, and the liquid in the annular chamber 605 carries the drill cuttings through the second one-way valve 307 and enters the first annular channel 601 and the sewage storage chamber 602 of the sewage discharge channel 600 in turn, thereby realizing the timely discharge of the drill cuttings generated around the drill tooth 201.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A strength detection device for a building structure, characterized in that: The invention comprises a support cylinder (300) and a drill cylinder (200) whose axis extends in the up-down direction, wherein a drill tooth (201) is provided at the lower end of the drill cylinder (200), a piston plate (400) is slidably provided inside the drill cylinder (200), a liquid storage chamber (606) is provided inside the drill cylinder (200) on the upper side of the piston plate (400), a first liquid outlet and a first one-way valve (402) are provided on the piston plate (400), a sewage discharge channel (600) is provided 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), and the sewage discharge channel (600) is provided with a liquid storage chamber (606) on the upper side of the piston plate (400). A second one-way valve (307) is provided at the lower end of the drill tube (200). When taking a sample core (102), the drill tube (200) and the support tube (300) move downward alternately. When the drill tube (200) moves downward, the piston plate (400) is pushed upward by the sample core (102), and the first one-way valve (402) opens, allowing the liquid in the liquid storage chamber (606) to flow along the side wall of the sample core (102) toward the periphery of the drill tooth (201). When the support tube (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 tooth (201) carries the drill cuttings into the sewage discharge channel (600).

2. The strength detection device for a building structure according to claim 1, characterized in that: The drill barrel (200) is rotatably arranged in the support barrel (300); the drill barrel (200) and the support barrel (300) are both cylindrical structures with a sealed upper end and an open lower end; a hand-held portion (500) is connected to the upper end of the support barrel (300); a mounting cavity (301) is provided at the upper end of the support barrel (300); a first driving mechanism for driving the drill barrel (200) to rotate is provided in the mounting cavity (301); a threaded connection column (208) with an axis extending in an up-and-down direction is fixed at the top end of the drill barrel (200); a threaded through hole (302) is provided at the bottom of the mounting cavity (301); the threaded connection column (208) is inserted into the threaded through hole (302); when the first driving mechanism drives the drill barrel (200) to rotate, the drill barrel (200) moves downward relative to the support barrel (300).

3. The strength detection device for a building structure according to claim 2, characterized in that: A liquid inlet channel is provided in the threaded connection column (208); the lower end of the liquid inlet channel is in communication with the liquid storage cavity (606), and the upper end is connected to a liquid inlet pipe.

4. The strength detection device for a building structure according to claim 2, characterized in that: The first driving mechanism comprises 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); 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; the first output shaft is connected to a first gear; the first gear meshes with the transmission gear (206) for transmission.

5. The strength detection device for a building structure according to claim 2, characterized in that: A spiral cutting edge (2010) is provided on the outer wall of the drill tooth (201); the upper end of the support tube (300) is rotatably connected to the handheld portion (500); a second driving mechanism for driving the support tube (300) to rotate is provided in the installation cavity (301); and a threaded structure (305) is provided on the side wall of the support tube (300).

6. The strength detection device for a building structure according to claim 5, characterized in that: The second driving mechanism comprises a second motor (520), the second motor (520) having a second output shaft, the second output shaft being connected to a second gear, an inner gear ring (303) being provided on the inner wall of the installation cavity (301), and the second gear meshingly drives with the inner gear ring (303).

7. The strength detection device for a building structure according to any one of claims 1 to 6, 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 tube (200).

8. The strength detection device for a building structure according to claim 7, characterized in that: A support column (401) is provided on the lower side of the piston plate (400) for supporting and cooperating with the top end of the sample 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 sample core (102).

9. The strength detection device for a building structure according to claim 6, characterized in that: The inner wall of the lower end of the drill barrel (200) protrudes inward to form an annular inner step (203). The inner wall of the lower end of the drill barrel (200) is used to fit with the outer wall of the sample core (102). When taking the sample core (102), a second annular channel (604) is formed between the drill barrel (200) and the side wall of the sample core (102) above the inner step (203). The inner step (203) is provided with a plurality of inner through grooves (202) whose axes extend in the up-down direction. The upper ends of the inner through grooves (202) are connected to the second annular channel (604), and the lower ends are connected to the space below the drill barrel (200).

10. The strength detection device for a building structure according to claim 9, characterized in that: The outer wall of the lower end of the drill tube (200) protrudes outward to form an annular outer step (205), and the outer step (205) is provided with a plurality of outer through grooves (204) whose axes extend in the up-down direction, and the upper ends of the outer through grooves (204) are connected to the space above the outer step (205), and the lower ends are connected to the space below the drill tube (200).

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