Concrete internal stress and shear stress detection device

Abstract

The utility model relates to a concrete internal stress and shear stress detection device which comprises a detection table and a box body, a concrete block is arranged on the detection table, a first detection assembly is arranged on the box body and comprises a first hydraulic cylinder and a first pressing block, and the first pressing block is vertically arranged in the box body in a sliding mode. A second detection assembly is arranged on the detection table, the second detection assembly comprises a supporting plate and a second hydraulic cylinder, an output shaft of the second hydraulic cylinder is provided with a second pressing block, the second pressing block is horizontally and slidably arranged on the surface of the detection table, and the arrangement of the first detection assembly and the second detection assembly enables workers not to frequently turn over concrete blocks in the detection process; and the concrete blocks do not need to be carried to different detection equipment, so that the structural strength testing time of the concrete is shortened. The method has the effect of improving the strength testing efficiency of the concrete structure.

Description

Technical Field

[0001] The present application relates to the technical field of concrete detection, and in particular to a device for detecting internal stress and shear stress of concrete. Background Art

[0002] Concrete refers to a general term for engineering composite materials in which aggregates are bonded into a whole by cementitious materials. Normally, concrete uses cement as the cementitious material, sand and stone as aggregates, and is mixed with water in a certain proportion to obtain cement concrete. At present, cement concrete materials are widely used in civil engineering. In order to ensure the safety and stability of construction projects, cement concrete needs to be tested for structural strength when used in buildings. The strength indicators of concrete mainly include compressive strength and shear strength. Compressive strength refers to the ability of concrete to resist vertical and horizontal pressure, and shear strength refers to the ability of concrete to resist horizontal and vertical pressure at the same time.

[0003] The Chinese patent with announcement number CN211401964U discloses a concrete slab stress detection device, which includes a fixed plate, a slide groove is opened on the top wall of the fixed plate, a bidirectional screw rod is arranged in the slide groove, the bidirectional screw rod is rotatably arranged in the slide groove, a driving motor is arranged on the fixed plate, the driving motor is used to drive the bidirectional screw rod to rotate, a clamping plate for clamping the concrete slab is symmetrically arranged on the fixed plate, the slide groove is symmetrically and slidably provided with two sliders, the two sliders are respectively threaded on two sections of the bidirectional screw rod with opposite rotation directions, one slider corresponds to one clamping plate, the clamping plate includes an upper plate body and a lower plate body, the slider is fixedly connected to the corresponding lower plate body, a cavity for the upper plate body to slide is vertically opened on the top wall of the lower plate body, an elastic member is arranged on the inner bottom wall of the cavity, the elastic member has a tendency to always make the lower plate body move toward the cavity, the detection device has the effect of enabling the clamping plate to meet the needs of concrete slabs of different sizes.

[0004] However, the hydraulic cylinder and stress sensor installed in the detection device can only perform vertical compressive strength tests on the surface of the concrete block. When the horizontal compressive strength test is required, the worker is required to flip the horizontal concrete test block to the vertical direction. When the worker needs to perform a shear strength test, the worker is required to move it to another testing device, which results in prolonged structural strength test time of the concrete and lower detection efficiency, which has obvious shortcomings. Utility Model Content

[0005] In order to improve the efficiency of concrete structure strength testing, the present application provides a concrete internal stress and shear stress detection device.

[0006] The present application provides a device for detecting internal stress and shear stress of concrete, which adopts the following technical solution:

[0007] A device for detecting internal stress and shear stress of concrete comprises a detection platform and a box body, wherein a concrete block to be detected is arranged on the detection platform, the box body cover is arranged above the detection platform, and a first detection component is arranged on the box body, the first detection component comprises a first hydraulic cylinder arranged on the box body, the output shaft of the first hydraulic cylinder is provided with a first pressure block, and the first pressure block is vertically slidably arranged inside the box body, and a second detection component is arranged on the detection platform, the second detection component comprises a support plate and a second hydraulic cylinder respectively arranged at both ends of the detection platform, the support plate abuts against the end face of the concrete block, the output shaft of the second hydraulic cylinder is provided with a second pressure block, and the second pressure block is horizontally slidably arranged on the surface of the detection platform.

[0008] By adopting the above technical solution, when it is necessary to test the compressive strength of the concrete block, the first hydraulic cylinder and the second hydraulic cylinder are started in sequence to ensure that the concrete block is subjected to a single vertical pressure or horizontal pressure, and the compressive strength of the concrete block is measured by changing the pressure. When performing a shear strength test, the first hydraulic cylinder is first started to subject the concrete block to continuous vertical pressure, and then the second hydraulic cylinder is started. The second hydraulic cylinder drives the second pressure block to generate horizontal pressure on the test block, and the shear strength of the concrete block is tested by continuously adjusting the pressure. This arrangement realizes the test of the structural strength of the concrete block. During the test process, workers do not need to frequently flip the concrete blocks, and there is no need to transport the concrete blocks to different testing equipment, which shortens the structural strength test time of the concrete and improves the efficiency of the concrete strength test.

[0009] Optionally, a first fixing plate and a second fixing plate are provided at opposite ends of the detection platform, the length directions of the first fixing plate and the second fixing plate are parallel to the length direction of the concrete block, and the opposite end faces of the first fixing plate and the second fixing plate are in contact with the concrete block.

[0010] By adopting the above technical solution, workers place the concrete block between the first fixed plate and the second fixed plate. The first fixed plate and the second fixed plate limit the concrete block, reducing the possibility of the concrete block moving on the surface of the test bench when it is under pressure, ensuring that the internal stress of the concrete block is evenly distributed when it is under pressure, thereby ensuring the accuracy of the strength test results.

[0011] Optionally, a moving component is provided on the detection platform, and moving grooves are provided at opposite ends of the detection platform, and the two moving grooves are respectively provided at the two ends of the first fixed plate and the second fixed plate. The moving component includes a first screw and a second screw that are rotatably connected to the moving grooves respectively, one end of the first fixed plate is threadedly connected to the first screw, and the other end is rotatably connected to the second screw, one end of the second fixed plate is threadedly connected to the second screw, and the other end is rotatably connected to the first screw.

[0012] By adopting the above technical solution, the first screw rotates to drive the first fixed plate to move along the movable groove, and the second screw rotates to drive the second fixed plate to move, and when the second fixed plate moves, it pushes the concrete block to move. The setting of the moving component causes the position of the concrete block relative to the first detection component and the second detection component to change, and the range of the strength test is expanded, thereby further improving the accuracy of the test results.

[0013] Optionally, the detection platform is provided with rotation grooves corresponding to the first screw and the second screw, and the first screw and the second screw are respectively rotatably connected in the corresponding rotation grooves. A locking assembly is provided in the rotation groove, and under the locking action of the locking assembly, the first screw and the second screw cannot rotate.

[0014] By adopting the above technical solution, when the concrete block needs to be moved, the locking effect of the locking assembly is canceled and the first screw and the second screw are rotated. When the concrete block moves to the specified position, the locking assembly is activated. Under the locking of the locking assembly, the first screw and the second screw cannot rotate, thereby fixing the test position of the concrete block, avoiding the possibility of the first screw or the second screw rotating and moving the concrete block due to accidental touch by a worker, thereby ensuring the stability of the concrete block during the strength test and further improving the accuracy of the test results.

[0015] Optionally, the locking assembly includes a locking block slidably connected to the rotating groove, the locking block and the rotating groove are both square in cross-section, the locking block is slidably sleeved on the outer surfaces of the first screw and the second screw, and sliders are provided on the opposite inner walls of the locking block, and the first screw and the second screw are provided with sliding grooves that slide with the sliders. A spring is provided in the rotating groove, one end of the spring is connected to the inner wall of the rotating groove, and the other end is connected to the locking block. In the natural state of the spring, the locking block is embedded in the rotating groove.

[0016] By adopting the above technical solution, when it is necessary to rotate the first screw or the second screw, the worker pulls the locking block outward to disengage the locking block from the rotating groove. At this time, the spring is stretched, and the first screw or the second screw can rotate. When locking is required, the worker cancels the pulling force on the locking block, the pulling force on the spring disappears, and the spring resets to drive the locking block to move into the rotating groove. At this time, the locking block cannot rotate in the rotating groove. At the same time, under the restriction of the sliding groove and the slider, the first screw and the second screw cannot rotate either, and the locking assembly locks the first screw or the second screw.

[0017] Optionally, chip suction holes are provided on the opposite end faces of the first fixed plate and the second fixed plate, and chip suction cavities connected to the chip suction holes are provided on the first fixed plate and the second fixed plate, and a chip suction assembly is provided on the bottom surface of the detection table, and the chip suction assembly includes a chip suction box and a dust collector, and bellows connected to the chip suction cavity are provided at both ends of the chip suction box, and the suction end of the dust collector is connected to the chip suction box.

[0018] By adopting the above technical solution, it is inevitable that concrete blocks will be broken during the strength test. In order to ensure that the concrete blocks are subjected to uniform stress during the test, workers need to clean the broken blocks. After the workers take out the large broken blocks on the testing table, they start the vacuum cleaner. The vacuum cleaner draws the air inside the chip suction chamber through the bellows. The pressure inside the chip suction chamber is reduced, and the small particles of debris remaining on the surface of the testing table enter the chip suction chamber through the chip suction holes, and finally flow through the bellows to the chip suction box to be collected. The setting of the chip suction component realizes the automatic cleaning of the small particles remaining on the testing table, reducing the time for workers to manually clean up the small particles of debris, thereby further improving the test efficiency.

[0019] Optionally, a filter plate is provided in the chip suction box, a chip removal slope is provided in the chip suction box, a chip removal port communicating with the chip removal slope is provided on the bottom surface of the chip suction box, and a chip removal door is hinged at the chip removal port.

[0020] By adopting the above technical solution, when the gas containing small particles of debris moves to the filter box, the small particles of debris are intercepted by the filter plate, thereby reducing the content of small particles of debris entering the vacuum cleaner, effectively reducing the impact of small particles of debris on the vacuum cleaner, and ensuring the smooth progress of the debris cleaning process.

[0021] Optionally, a surface of the support plate facing away from the concrete block is connected to a reinforcing rib, and one end of the reinforcing rib away from the support plate is connected to the surface of the detection platform.

[0022] By adopting the above technical solution, the provision of the reinforcing ribs improves the supporting strength of the support plate and improves the stability of the concrete block when receiving the horizontal pressure of the second detection assembly.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. This application provides a first detection assembly and a second detection assembly. The configuration of the first detection assembly and the second detection assembly eliminates the need for workers to frequently flip concrete blocks during the testing process, and eliminates the need to carry concrete blocks to different testing equipment. This shortens the time required for concrete structural strength testing and improves the efficiency of concrete strength testing.

[0025] 2. This application provides a first fixed plate, a second fixed plate, and a moving assembly. The moving assembly drives the first and second fixed plates to move, which in turn pushes the concrete block to move. This changes the position of the concrete block relative to the first and second detection assemblies, thereby expanding the range of the strength test and further improving the accuracy of the test results.

[0026] 3. This application sets a locking assembly to lock the rotation of the first screw and the second screw, so that the test position of the concrete block is fixed, avoiding the possibility of the first screw or the second screw rotating and moving the concrete block due to accidental touch by a worker, thereby ensuring the stability of the concrete block during the strength test and further improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of this application.

[0028] Figure 2 It is a cross-sectional view of the box body in the embodiment of the present application.

[0029] Figure 3 Schematic diagram of the positions of the first fixing plate and the second fixing plate on the detection table in an embodiment of the present application.

[0030] Figure 4 It is a cross-sectional view of the moving groove and the rotating groove in the embodiment of the present application.

[0031] Figure 5 In the embodiment of this application Figure 4 Enlarged view of point A in the middle.

[0032] Figure 6 It is a cross-sectional view of the dust suction box in the embodiment of the present application.

[0033] Explanation of the accompanying reference numerals: 01, concrete block; 1, testing table; 101, moving groove; 102, rotating groove; 2, box body; 21, box door; 3, first detection component; 31, first hydraulic cylinder; 32, first pressure block; 4, second detection component; 41, second hydraulic cylinder; 42, support plate; 421, reinforcing rib; 43, second pressure block; 5, first fixed plate; 6, second fixed plate; 7, moving component; 71, first screw; 72, second screw; 8, locking component; 81, locking block; 811, through groove; 82, slider; 83, spring; 9, slide; 10, chip suction hole; 11, chip suction chamber; 12, chip suction component; 121, chip suction box; 122, bellows; 123, vacuum cleaner; 13, filter plate; 14, chip discharge ramp; 15, chip discharge port; 151, chip discharge door. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-6 This application is described in further detail.

[0035] The embodiment of the present application discloses a device for detecting internal stress and shear stress of concrete.

[0036] Reference Figure 1 A device for detecting internal stress and shear stress of concrete includes a detection platform 1 and a box body 2. The box body 2 is covered above the detection platform 1. A box door 21 is hinged on the box body 2, and the box door 21 is made of transparent acrylic material.

[0037] During the test, the worker opens the box door 21 and places the concrete block 01 on the surface of the test platform 1. During the test, the worker can observe the test process inside the box body 2 through the transparent box door 21.

[0038] Reference Figure 1 and Figure 2 A first detection assembly 3 is provided on the box body 2. The first detection assembly 3 includes a first hydraulic cylinder 31 fixedly mounted on the top surface of the box body 2. The output shaft of the first hydraulic cylinder 31 extends into the interior of the box body 2 and is fixedly connected to a first pressure block 32. The first pressure block 32 is vertically slidably disposed inside the box body 2.

[0039] Reference Figure 1 and Figure 2A second detection component 4 is provided on the detection platform 1, and the second detection component 4 includes a second hydraulic cylinder 41 and a support plate 42. The support plate 42 and the second hydraulic cylinder 41 are respectively fixedly mounted at both ends of the detection platform 1, and the end surface of the support plate 42 facing the second hydraulic cylinder 41 abuts on the concrete block 01. The surface of the support plate 42 facing away from the second hydraulic cylinder 41 is fixedly connected with a reinforcing rib 421, and the end of the reinforcing rib 421 away from the support plate 42 is fixedly connected to the surface of the detection platform 1. The reinforcing rib 421 improves the supporting strength of the support plate 42, and the output shaft of the second hydraulic cylinder 41 is fixedly connected with a second pressure block 43, and the second pressure block 43 is horizontally slidably connected to the inside of the box body 2. The surfaces of the first pressure block 32 and the second pressure block 43 facing the concrete block 01 are both fixedly mounted with pressure sensors for detecting pressure values.

[0040] When the compressive strength of the concrete block 01 needs to be tested, the first hydraulic cylinder 31 is first started. The first hydraulic cylinder 31 drives the first pressure block 32 to generate vertical pressure on the test block. Then, the first pressure block 32 is reset and the second hydraulic cylinder 41 is started. The second hydraulic cylinder 41 drives the second pressure block 43 to generate horizontal pressure on the test block. Then, by changing the pressure, the compressive strength of the concrete block 01 in the horizontal and vertical directions is measured, and the pressure value of each test is obtained through the pressure sensor.

[0041] When conducting a shear strength test, the first hydraulic cylinder 31 is first started to cause the first pressure block 32 to generate vertical pressure on the test block, and then the second hydraulic cylinder 41 is started. The second hydraulic cylinder 41 drives the second pressure block 43 to generate horizontal pressure on the test block. Finally, the shear strength of the test block is tested by continuously adjusting the pressure. This setting realizes the test of the structural strength of the concrete block 01, and during the test process, workers do not need to frequently flip the concrete block 01, and there is no need to transport the concrete block 01 to different testing equipment, which shortens the structural strength test time of the concrete and improves the efficiency of the concrete strength test.

[0042] Reference Figure 3 and Figure 4 The first and second fixing plates 5 and 6 are slidably connected at both opposite ends of the testing platform 1. The length directions of the first and second fixing plates 5 and 6 are parallel to the length direction of the concrete block 01. During the test, the opposite end faces of the first and second fixing plates 5 and 6 are in contact with the end faces of the concrete block 01. The first and second fixing plates 5 and 6 limit the concrete block 01, reducing the possibility of the concrete block 01 moving on the surface of the testing platform 1 when under pressure, ensuring that the internal stress of the concrete block 01 is evenly distributed when under pressure, thereby ensuring the accuracy of the strength test results.

[0043] Reference Figure 3 and Figure 4, a movable groove 101 is provided at both opposite ends of the detection platform 1, and the length direction of the movable groove 101 is perpendicular to the length direction of the first fixed plate 5 and the second fixed plate 6. The two movable grooves 101 are respectively arranged at both ends of the first fixed plate 5 and the second fixed plate 6. A movable component 7 is provided on the detection platform 1, and the movable component 7 includes a first screw 71 and a second screw 72 respectively rotatably connected to the movable groove 101. The first fixed plate 5 and the second fixed plate 6 are perpendicular to the first screw 71 and the second screw 72. One end of the first fixed plate 5 is threadedly connected to the first screw 71, and the other end is rotatably connected to the second screw 72. One end of the second fixed plate 6 is threadedly connected to the second screw 72, and the other end is rotatably connected to the first screw 71. The first fixed plate 5 and the second fixed plate 6 are both slidably connected to the surface of the detection platform 1.

[0044] When the detection position of the concrete block 01 needs to be changed, the worker rotates the first screw 71, and the rotation of the first screw 71 drives the first fixed plate 5 to move along the length direction of the movable groove 101. After the first fixed plate 5 moves to the specified position, the worker rotates the second screw 72, and the second screw 72 drives the second fixed plate 6 to move. During the movement, the second fixed plate 6 pushes the concrete block 01 toward the first fixed plate 5. When the end face of the concrete block 01 abuts against the surface of the first fixed plate 5, the second screw 72 is stopped, and the worker continues to test the concrete block 01. The setting of the moving component 7 causes the position of the concrete block 01 relative to the first detection component 3 and the second detection component 4 to change, and the range of the strength test is expanded, thereby further improving the accuracy of the test results.

[0045] Reference Figure 4 and Figure 5 The surface of the inspection platform 1 away from the box door 21 is provided with a rotation groove 102 corresponding to the first screw 71 and the second screw 72. The ends of the first screw 71 and the second screw 72 away from the box door 21 are both rotatably connected in the rotation groove 102 and extend out of the box body 2. A locking assembly 8 is provided in each rotation groove 102. The locking assembly 8 includes a locking block 81 slidably connected in the rotation groove 102. The outer surface of the locking block 81 is tightly fitted with the inner side wall of the rotation groove 102. The cross-sections of the locking block 81 and the rotation groove 102 are both square. Each locking block 81 is provided with a through groove 81. 1. One end of the first screw 71 and the second screw 72 close to the locking block 81 passes through the through slot 811 and is slidably connected to the inside of the through slot 811. A slider 82 is fixedly connected to the inner side wall opposite to the through slot 811. The slider 82 and the locking block 81 are integrally formed. The first screw 71 and the second screw 72 are both provided with a sliding groove 9 that slides with the slider 82. A spring 83 is provided in the rotating groove 102. One end of the spring 83 is connected to the inner side wall of the rotating groove 102, and the other end is connected to the locking block 81. In the natural state of the spring 83, the locking block 81 is embedded in the rotating groove 102.

[0046] When it is necessary to rotate the first screw 71 or the second screw 72, the worker pulls the locking block 81 outward to disengage the locking block 81 from the rotating groove 102. At this time, the spring 83 is stretched, and the first screw 71 or the second screw 72 can rotate. When locking is required, the worker cancels the pulling force on the locking block 81, the pulling force on the spring 83 disappears, and the spring 83 resets and drives the locking block 81 to move into the rotating groove 102. At this time, the locking block 81 cannot rotate in the rotating groove 102. At the same time, under the restriction of the slide groove 9 and the slider 82, the first screw 71 and the second screw 72 cannot rotate either, thereby fixing the test position of the concrete block 01. The setting of the locking assembly 8 avoids the possibility of the first screw 71 or the second screw 72 rotating and driving the concrete block 01 to move due to accidental touch by the worker, thereby ensuring the stability of the concrete block 01 during the strength test and further improving the accuracy of the test results.

[0047] Reference Figure 5 and Figure 6 The first fixed plate 5 and the second fixed plate 6 are provided with chip suction holes 10 on the opposite end faces, and the first fixed plate 5 and the second fixed plate 6 are provided with chip suction chambers 11 connected to the chip suction holes 10. The bottom surface of the detection platform 1 is fixedly connected to a chip suction box 121, and both ends of the chip suction box 121 are provided with bellows 122 corresponding to the first fixed plate 5 and the second fixed plate 6 one by one. One end of the bellows 122 is connected to the interior of the chip suction box 121, and the other end is connected to the interior of the chip suction chamber 11. A dust collector 123 is fixedly installed on the bottom surface of the detection platform 1, and the suction end of the dust collector 123 is connected to the interior of the chip suction box 121 through an air pipe.

[0048] Reference Figure 6 A filter plate 13 is fixedly installed inside the chip suction box 121, and a chip discharge slope 14 is provided on the bottom surface of the chip suction box 121. A chip discharge port 15 connected to the chip discharge slope 14 is opened on the bottom surface of the chip suction box 121, and a chip discharge door 151 is hinged at the chip discharge port 15. When too much particulate impurities accumulate inside the chip suction box 121, the worker opens the chip discharge door 151 to clean the particulate impurities in a centralized manner.

[0049] During the strength test, it is inevitable that the concrete block 01 will be broken. In order to ensure that the stress on the concrete block 01 is uniform during the test, the worker needs to clean the broken blocks. After the worker takes out the large broken blocks on the test table 1, he starts the vacuum cleaner 123. The vacuum cleaner draws the air inside the chip suction chamber 11 through the bellows 122. The pressure inside the chip suction chamber 11 is reduced, and the small particles of debris remaining on the surface of the test table 1 enter the chip suction chamber 11 through the chip suction hole 10, and finally flow through the bellows 122 to the chip suction box 121, where they are blocked by the filter plate 13 and accumulated at the chip discharge port 15 under the guidance of the chip discharge slope 14. The setting of the chip suction component 12 realizes the automatic cleaning of the small particles remaining on the test table 1, reduces the time for workers to manually clean up the small particles of debris, and thus further improves the test efficiency.

[0050] The working principle of the concrete internal stress and shear stress detection device of the present application embodiment is as follows: before testing, the worker opens the box door 21 and places the concrete block 01 on the surface of the testing table 1. Then, the first screw 71 and the second screw 72 are rotated in sequence to make the opposite end surfaces of the first fixing plate 5 and the second fixing plate 6 abut against the concrete end surface. Then, the worker closes the box door 21 and performs the test.

[0051] During the test, the first hydraulic cylinder 31 is first started, and the first hydraulic cylinder 31 drives the first pressure block 32 to generate vertical pressure on the test block, then the first pressure block 32 is reset and the second hydraulic cylinder 41 is started, and the second hydraulic cylinder 41 drives the second pressure block 43 to generate horizontal pressure on the test block, and then the compressive strength of the concrete block 01 in the horizontal and vertical directions is measured by changing the pressure, and the pressure value of each test is obtained through the pressure sensor. When performing shear strength testing, the first hydraulic cylinder 31 is first started to make the first pressure block 32 generate vertical pressure on the test block, and then the second hydraulic cylinder 41 is started, and the second hydraulic cylinder 41 drives the second pressure block 43 to generate horizontal pressure on the test block, and finally the shear strength of the test block is tested by continuously adjusting the pressure. This arrangement realizes the detection of the structural strength of the concrete block 01, and during the detection process, workers do not need to frequently flip the concrete block 01, and there is no need to transport the concrete block 01 to different testing equipment, which shortens the structural strength test time of the concrete and improves the efficiency of the concrete strength test.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A device for detecting internal stress and shear stress of concrete, comprising a detection platform (1) and a box (2), wherein a concrete block (01) to be detected is arranged on the detection platform (1), and the box (2) is arranged above the detection platform (1), characterized in that: A first detection assembly (3) is provided on the box body (2), the first detection assembly (3) comprises a first hydraulic cylinder (31) provided on the box body (2), the output shaft of the first hydraulic cylinder (31) is provided with a first pressure block (32), the first pressure block (32) is vertically slidably provided inside the box body (2), a second detection assembly (4) is provided on the detection platform (1), the second detection assembly (4) comprises a support plate (42) and a second hydraulic cylinder (41) respectively provided at both ends of the detection platform (1), the support plate (42) abuts against the end face of the concrete block (01), the output shaft of the second hydraulic cylinder (41) is provided with a second pressure block (43), the second pressure block (43) is horizontally slidably provided on the surface of the detection platform (1).

2. A concrete internal stress and shear stress detection device according to claim 1, characterized in that: The detection platform (1) is provided with a first fixing plate (5) and a second fixing plate (6) at opposite ends thereof; the length direction of the first fixing plate (5) and the second fixing plate (6) are parallel to the length direction of the concrete block (01); and the opposite end surfaces of the first fixing plate (5) and the second fixing plate (6) are in contact with the concrete block (01).

3. A device for detecting internal stress and shear stress of concrete according to claim 2, characterized in that: The detection platform (1) is provided with a moving assembly (7), and moving grooves (101) are provided at opposite ends of the detection platform (1). The two moving grooves (101) are respectively provided at the two ends of the first fixed plate (5) and the second fixed plate (6). The moving assembly (7) includes a first screw rod (71) and a second screw rod (72) which are respectively rotatably connected in the moving grooves (101). One end of the first fixed plate (5) is threadedly connected to the first screw rod (71), and the other end is rotatably connected to the second screw rod (72). One end of the second fixed plate (6) is threadedly connected to the second screw rod (72), and the other end is rotatably connected to the first screw rod (71).

4. A device for detecting internal stress and shear stress of concrete according to claim 3, characterized in that: The detection platform (1) is provided with a rotation groove (102) corresponding to the first screw rod (71) and the second screw rod (72). The first screw rod (71) and the second screw rod (72) are respectively rotatably connected in the corresponding rotation groove (102). A locking assembly (8) is provided in the rotation groove (102). Under the locking action of the locking assembly (8), the first screw rod (71) and the second screw rod (72) cannot rotate.

5. A device for detecting internal stress and shear stress of concrete according to claim 4, characterized in that: The locking assembly (8) includes a locking block (81) slidably connected to the rotating groove (102), the cross-sections of the locking block (81) and the rotating groove (102) are both square, the locking block (81) is slidably sleeved on the outer surfaces of the first screw rod (71) and the second screw rod (72), and sliders (82) are provided on the opposite inner side walls of the locking block (81), and the first screw rod (71) and the second screw rod (72) are provided with sliding grooves (9) that slide with the sliders (82), and a spring (83) is provided in the rotating groove (102), one end of the spring (83) is connected to the inner side wall of the rotating groove (102), and the other end is connected to the locking block (81), and when the spring (83) is in a natural state, the locking block (81) is embedded in the rotating groove (102).

6. A device for detecting internal stress and shear stress of concrete according to claim 2, characterized in that: The first fixed plate (5) and the second fixed plate (6) are provided with chip suction holes (10) on their opposite end surfaces, and the first fixed plate (5) and the second fixed plate (6) are provided with chip suction chambers (11) connected to the chip suction holes (10). The bottom surface of the detection table (1) is provided with a chip suction assembly (12), and the chip suction assembly (12) includes a chip suction box (121) and a dust collector (123). Bellows (122) connected to the chip suction chamber (11) are provided at both ends of the chip suction box (121), and the suction end of the dust collector (123) is connected to the chip suction box (121).

7. A device for detecting internal stress and shear stress of concrete according to claim 6, characterized in that: A filter plate (13) is provided in the chip suction box (121), a chip removal inclined surface (14) is provided in the chip suction box (121), a chip removal opening (15) communicating with the chip removal inclined surface (14) is provided on the bottom surface of the chip suction box (121), and a chip removal door (151) is hingedly connected to the chip removal opening (15).

8. The device for detecting internal stress and shear stress of concrete according to claim 1, characterized in that: A plurality of reinforcing ribs (421) are connected to the surface of the support plate (42) facing away from the concrete block (01), and one end of the reinforcing ribs (421) away from the support plate (42) is connected to the surface of the detection platform (1).

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