Pressurizing device for highway engineering raw material test detection

Abstract

The invention relates to the technical field of pressure detection, and discloses a pressurizing device for highway engineering raw material test detection, which comprises a pressure testing machine and a pressing plate arranged at the output end of the pressure testing machine. For detection of the rectangular test piece, the friction force during test piece adjustment is greatly reduced through the design of free rotation of the balls, the manual operation difficulty is reduced, surface abrasion of the test piece is avoided, and positioning can be rapidly completed; for the detection of a circular test piece, the unique structure of a turntable guide block is linked with a ball through height gradient change, the test piece is automatically and accurately guided to the center of a pressing plate, manual positioning errors are thoroughly eliminated, and the high precision and repeatability of detection data are ensured; after the test piece is positioned, through precise mechanical linkage of the turntable, the ejector rod and the ball, the device automatically realizes through hole plugging and seamless connection of a pressure detection link, ensures that the test piece is uniformly stressed in a pressurizing process, avoids non-uniform pressure distribution caused by the through hole, and effectively improves the reliability of a detection result.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure detection, and in particular relates to a pressure device for testing and detecting raw materials of highway engineering. Background Art

[0002] In highway construction, the performance of raw materials directly determines the quality and service life of the project, making accurate testing and inspection of raw materials crucial. Pressure testing, a core method for assessing key indicators such as material strength and compressive resistance, is crucial. The performance of the testing equipment has a decisive impact on the accuracy and reliability of the results.

[0003] For rectangular specimens, due to their large size and weight, sliding adjustment is required on the surface of the substrate to align with the center of the pressure plate of the pressure testing machine during the test process. Traditional substrates are mostly fixed planar structures. When the specimen slides, large friction is generated between the substrate and the specimen, which not only makes manual adjustment difficult and time-consuming, but also easily causes wear and scratches on the specimen surface, especially high-strength concrete precast blocks, large asphalt mixture plate specimens, etc. Surface damage will directly affect the detection accuracy of key indicators such as material strength and compressive resistance, resulting in distortion of test data; for circular specimens, due to the special shape of theirs, existing equipment usually needs to replace the appropriate substrate to achieve effective positioning to prevent the circular specimen from rolling and offsetting during the pressurization process. Frequent replacement of substrates is not only cumbersome and reduces detection efficiency, but also increases equipment maintenance costs and the risk of misoperation.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: A pressure device for testing and inspecting raw materials of highway engineering comprises a pressure testing machine and a pressure plate installed at the output end thereof.

[0006] A pressure sensor is provided at the bottom of the pressure plate, and a base plate is installed on the pressure testing machine; The substrate is provided with a through hole, and a plurality of balls for guiding the sliding of the test piece are installed in the through hole; Several pairs of the ball bearings are provided with push rods at the bottom, a turntable is mounted on the base plate, and several pairs of guide blocks with slopes are mounted around the turntable, and the guide blocks gradually increase in height from the center to the outer edge of the turntable, the central angles corresponding to the several pairs of guide blocks are the same, and the push rods are slidably connected to the guide blocks; The guide block squeezes the corresponding push rod to slide upward, thereby driving several pairs of balls to form an arc surface for guiding the circular test piece to slide to the center position of the pressure plate; A top plate is rotatably mounted on the bottom of the through hole, and the ball slides downward to squeeze the top plate and flip to seal the through hole, so that the pressure on the test piece is balanced.

[0007] As a preferred embodiment of the present invention, a base is installed at the bottom of the pressure testing machine, a fixed seat is installed at the bottom of the base, the fixed seat is in the shape of a boss, four support frames are installed on the base, the tops of the four support frames are interconnected with the bottom of the base plate, and four mounting grooves for easy connection are installed on the base plate.

[0008] As a preferred embodiment of the present invention, an extrusion block is installed at the bottom of the pressure plate, a pressure sensor is installed on the extrusion block, a controller is installed on the pressure testing machine, a wiring harness is installed on the connection port of the controller, the wiring harness movably passes through the pressure plate, and the end of the wiring harness is interconnected with the pressure sensor.

[0009] As a preferred embodiment of the present invention, a detection groove is provided on the substrate, and the detection groove is circular, several pairs of the balls are evenly surrounded in the detection groove, and a connecting cover is rotatably installed on the bottom of the balls, and the connecting cover movably passes through the through hole, and the bottom of the connecting cover is connected to the top rod.

[0010] As a preferred embodiment of the present invention, a drive motor is installed at the bottom of the base plate, the output shaft of the drive motor movably passes through the side wall of the base plate, and the end of the output shaft is connected to the rotation center of the turntable, and corresponding slide rails are provided on the guide block and the turntable, and a slider is slidably provided on the slide rail, and the slider is installed at the bottom of the corresponding top rod.

[0011] As a preferred embodiment of the present invention, a limit plate is fixedly installed in the inner cavity of the substrate, and the limit plate is located above the turntable, the push rod movably passes through the limit plate, and a return spring is sleeved on the side wall of the push rod, one end of the return spring is clamped on the limit plate, and the other end of the return spring is clamped on the bottom of the connecting cover, and the return spring is in a stretched state.

[0012] As a preferred embodiment of the present invention, a fixing frame is installed on the base plate, a synchronization shaft is fixedly installed on the fixing frame, a connecting frame is rotatably installed on the synchronization shaft, and a torsion spring is sleeved on the synchronization shaft, and both ends of the torsion spring are respectively clamped on the fixing frame and the connecting frame, and a top plate is installed at the bottom of the connecting frame, and the top plate is adapted to the size of the through hole.

[0013] As a preferred embodiment of the present invention, a rocker arm is installed on the synchronization shaft, the rocker arm is in an inclined state, a countersunk groove is opened on the base plate, the rocker arm is placed inside the countersunk groove, and a bending rod is provided on the surface of the rocker arm for vertical sliding.

[0014] As a preferred embodiment of the present invention, the bending rod is L-shaped, the bottom of the bending rod is placed below the ball, a strip groove is provided on the surface of the rocker arm, the strip groove is a through groove, a sliding rod is installed on the top of the bending rod, the sliding rod is movably inserted in the strip groove, and the diameter of the cross section of the sliding rod is adapted to the width of the strip groove.

[0015] As a preferred embodiment of the present invention, a positioning column is installed on the sliding rod, and an insertion rod is movably inserted inside the positioning column. The bottom of the insertion rod is installed on the limit plate, and a compression spring is sleeved on the insertion rod. One end of the compression spring is clamped on the limit plate, and the other end of the compression spring is clamped on the end face of the positioning column.

[0016] Compared with the prior art, the present invention has the following beneficial effects: For the detection of rectangular specimens, the design of the free rotation of the ball bearings in the present invention greatly reduces the friction during specimen adjustment, which not only reduces the difficulty of manual operation and avoids wear on the specimen surface, but also can quickly complete positioning; for the detection of circular specimens, the unique structure of the turntable guide block is linked with the ball bearings through height gradient changes, automatically and accurately guides the specimen to the center of the pressure plate, completely eliminating human positioning errors and ensuring high accuracy and repeatability of the detection data; after the specimen is positioned, the device automatically seals the through-holes through the precise mechanical linkage of the turntable, the push rod and the ball bearings, seamlessly connects the pressure detection link, ensures that the specimen is evenly stressed during the pressurization process, avoids uneven pressure distribution due to the through-holes, and effectively improves the reliability of the detection results; from specimen positioning, through-hole sealing to pressure detection and equipment resetting, the entire process is fully automated through the sophisticated mechanical structure design, which reduces manual intervention while also adapting to circular specimens of different diameters by adjusting the motor angle. It is compatible with two common types of rectangular and circular specimens, which not only improves detection efficiency, but also broadens the application range of the equipment, fully meeting the diverse detection needs of raw materials in highway engineering.

[0017] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the attached figure: Figure 1 This is a schematic diagram of the three-dimensional structure of a pressurizing device used for testing and inspecting raw materials for highway engineering projects; Figure 2 This is a bottom view of a pressurizing device for testing and inspecting raw materials for highway engineering projects; Figure 3 A schematic diagram of the partial structure of a pressurizing device used for testing raw materials in highway engineering projects Figure 1 ; Figure 4 This is a cross-sectional view of a pressurizing device used for testing and inspecting raw materials for highway engineering projects; Figure 5 A schematic diagram of the partial structure of a pressurizing device used for testing raw materials in highway engineering projects Figure 2 ; Figure 6 A schematic diagram of the partial structure of a pressurizing device used for testing raw materials in highway engineering projects Figure 3 ; Figure 7 A pressure device for testing raw materials in highway engineering Figure 6 Enlarged view of point A in the middle; Figure 8 A pressure device for testing raw materials in highway engineering Figure 6 Enlarged view of point B in the middle.

[0019] In the picture: 1. Pressure testing machine; 11. Pressing plate; 111. Extrusion block; 112. Pressure sensor; 12. Base plate; 121. Mounting slot; 122. Testing slot; 13. Base; 131. Fixing seat; 132. Support frame; 14. Controller; 141. Wiring harness; 2. Ball bearing; 21. Connecting cover; 211. Through hole; 212. Countersunk groove; 22. Ejector rod; 221. Limit plate; 222. Return spring; 223. Slider; 23. Turntable; 231. Guide block; 232. Ramp; 233. Slide rail; 24. Drive motor; 3. Top plate; 31. Connecting frame; 311. Fixed frame; 312. Synchronous shaft; 32. Rocker arm; 321. Strip groove; 322. Sliding rod; 323. Bending rod; 33. Positioning column; 331. Insert rod; 332. Compression spring. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0021] Example 1:

[0022] like Figures 1 to 8 As shown, a pressure device for testing and inspecting raw materials for highway engineering comprises a pressure testing machine 1 and a pressure plate 11 installed at its output end.

[0023] A pressure sensor 112 is provided at the bottom of the pressure plate 11, and a base plate 12 is mounted on the pressure testing machine 1; A through hole 211 is formed on the substrate 12, and a plurality of balls 2 for guiding the sliding of the test piece are installed in the through hole 211; Several pairs of balls 2 are provided with push rods 22 at the bottom, a turntable 23 is installed on the base plate 12, and several pairs of guide blocks 231 with slopes 232 are installed around the turntable 23, and the height of the guide blocks 231 gradually increases from the center to the outer edge of the turntable 23. The central angles corresponding to the several pairs of guide blocks 231 are the same, and the push rods 22 are slidably connected to the guide blocks 231; the guide blocks 231 squeeze the corresponding push rods 22 to slide upward, thereby driving several pairs of balls 2 to form an arc-shaped surface for guiding the circular specimen to slide to the center position of the pressure plate 11; a top plate 3 is rotatably installed at the bottom of the through hole 211, and the ball 2 slides downward to squeeze the top plate 3 to flip and seal the through hole 211, so that the pressure on the specimen is balanced.

[0024] This linkage structure of the ball 2 and the top plate 3 greatly optimizes the specimen testing process. The ball 2 can effectively reduce the friction between the specimen and the substrate 12. When placing a rectangular specimen, the staff does not need to push it with effort. Only a slight force is needed to make the specimen slide smoothly along the surface of the ball 2, avoiding wear and scratches on the surface of the specimen caused by strong pushing and pulling, ensuring that the original state of the specimen is not damaged, thereby ensuring that the pressurized test data truly reflects the material properties. The design of the top plate 3 automatically blocking the through hole 211 can avoid the problem of suspension or insufficient support under the specimen, prevent pressure from being concentrated in a local area, and allow the specimen to obtain uniform support force through the top plate 3 when pressurized, effectively improving the credibility of the test results.

[0025] like Figures 1 to 8 As shown, in a specific embodiment, a base 13 is installed at the bottom of the pressure testing machine 1, and a fixing seat 131 is installed at the bottom of the base 13. The fixing seat 131 is in the shape of a boss. Four support frames 132 are installed on the base 13. The tops of the four support frames 132 are interconnected with the bottom of the base plate 12. Four mounting slots 121 for easy connection are installed on the base plate 12. The stable structure of the base 13 and the support frame 132 can effectively withstand the vibrations generated during the test and prevent the equipment from shaking and affecting the detection accuracy. Even under high-pressure testing, the equipment remains stable, providing a reliable basic environment for testing. The design of the mounting slot 121 facilitates the assembly and disassembly of the equipment. When the equipment fails or parts need to be replaced, technicians can quickly locate and operate, which greatly shortens the repair time and reduces maintenance costs.

[0026] like Figures 1 to 8As shown, further, an extrusion block 111 is installed at the bottom of the pressure plate 11, a pressure sensor 112 is installed on the extrusion block 111, a controller 14 is installed on the pressure testing machine 1, and a wiring harness 141 is installed on the connection port of the controller 14. The wiring harness 141 is movable through the pressure plate 11, and the end of the wiring harness 141 is interconnected with the pressure sensor 112. The cooperation between the pressure sensor 112 and the controller 14 realizes real-time monitoring and accurate feedback of pressure data. During the pressurization process, the pressure sensor 112 can keenly capture the pressure changes and quickly transmit the data to the controller 14 through the wiring harness 141. After the controller 14 analyzes and processes the data, it clearly presents the pressure value and change trend on the display screen, making it convenient for the operator to grasp the progress of the test at any time. Once an abnormal situation occurs, the test can be stopped in time to avoid wasting materials and time, and ensure that the detection work proceeds smoothly. The pressure sensor 112 and the controller 14 are existing technologies, and their specific principles are not repeated here.

[0027] Example 2:

[0028] The difference between the above embodiment and this embodiment is that: Figures 1 to 8 As shown, a detection groove 122 is provided on the base plate 12, and the detection groove 122 is circular, and several pairs of balls 2 are evenly surrounded in the detection groove 122, and a connecting cover 21 is rotatably installed at the bottom of the ball 2, and the connecting cover 21 is movable through the through hole 211, and the bottom of the connecting cover 21 is connected to the top rod 22. The annular layout of the circular detection groove 122 and the ball 2 is specially designed for the detection needs of circular specimens. When the circular specimen is placed on the ball 2, under the combined action of its own gravity and the rolling of the ball 2, it can automatically roll along the most convenient path to the center of the pressure plate 11, without the need for manual repeated adjustment of the specimen position, which not only saves detection time, but also eliminates the errors caused by human operation, ensuring that the circular specimen can be accurately located at the pressure center during each detection, thereby improving the consistency and accuracy of the detection results.

[0029] like Figures 1 to 8As shown, in a specific embodiment, a drive motor 24 is installed at the bottom of the substrate 12, and the output shaft of the drive motor 24 movably passes through the side wall of the substrate 12, and the end of the output shaft is interconnected with the rotation center of the turntable 23, and corresponding slide rails 233 are provided on the guide block 231 and the turntable 23, and a slider 223 is slidably provided on the slide rail 233, and the slider 223 is installed at the bottom of the corresponding push rod 22. The design of the drive motor 24 driving the turntable 23 to rotate realizes the automatic adjustment of the height of the ball 2. When a circular specimen needs to be tested, the operator only needs to start the drive motor 24, and the guide block 231 on the turntable 23, through the cooperation of the slide rail 233 and the slider 223, orderly pushes the push rod 22 to rise, so that the ball 2 forms a specific arc surface. The whole process does not require manual adjustment of the height of the ball 2, and the operation is simple and convenient. At the same time, it ensures the consistency of each adjustment, thereby improving the stability and reliability of the equipment operation.

[0030] like Figures 1 to 8 As shown, a limit plate 221 is fixedly installed in the inner cavity of the base plate 12, and the limit plate 221 is located above the rotating disk 23. The push rod 22 movably passes through the limit plate 221. A return spring 222 is sleeved on the side wall of the push rod 22. One end of the return spring 222 is clamped on the limit plate 221, and the other end of the return spring 222 is clamped on the bottom of the connecting cover 21. The return spring 222 is in a stretched state. The combination of the return spring 222 and the limit plate 221 provides a reliable guarantee for the return of the ball 2.

[0031] Example 3:

[0032] The difference between the above embodiment and this embodiment is that: Figures 1 to 8 As shown, a fixing frame 311 is installed on the base plate 12, and a synchronization shaft 312 is fixedly installed on the fixing frame 311. A connecting frame 31 is rotatably installed on the synchronization shaft 312, and a torsion spring is sleeved on the synchronization shaft 312. The two ends of the torsion spring are respectively clamped on the fixing frame 311 and the connecting frame 31. A top plate 3 is installed at the bottom of the connecting frame 31, and the size of the top plate 3 is adapted to the through hole 211. The torsion spring-driven flip mechanism of the top plate 3 realizes the automatic opening and closing of the through hole 211. During the detection process, the opening and closing of the top plate 3 is completely automatically controlled by the mechanical structure, without the need for human intervention, avoiding the occurrence of inaccurate detection results due to human negligence and forgetting to close the through hole 211. At the same time, it also reduces the workload of the operator, improves the degree of automation of the equipment and the safety of the detection process.

[0033] like Figures 1 to 8As shown, in a specific embodiment, a rocker arm 32 is mounted on the synchronization shaft 312. The rocker arm 32 is tilted. A countersunk groove 212 is defined on the base plate 12, and the rocker arm 32 is positioned within the countersunk groove 212. A bending rod 323 is vertically slidably disposed on the surface of the rocker arm 32. The bending rod 323 is L-shaped, with its bottom positioned below the ball 2. A strip groove 321 is defined on the surface of the rocker arm 32. The strip groove 321 is a through groove. A slide rod 322 is mounted on the top of the bending rod 323. The slide rod 322 is movably inserted into the strip groove 321, and the cross-sectional diameter of the slide rod 322 matches the width of the strip groove 321. The linkage design of the rocker arm 32 and the bending rod 323 cleverly converts the vertical displacement of the ball 2 into a flipping motion of the top plate 3. When the ball 2 moves downward, it squeezes the bent rod 323, and the sliding rod 322 slides within the strip groove 321, driving the rocker arm 32 to rotate about the synchronization axis 312, thereby causing the top plate 3 to flip over and block the through hole 211. The entire transmission process is smooth and natural, requiring no additional power source, reducing energy consumption, and ensuring the timely and accurate flipping of the top plate 3.

[0034] like Figures 1 to 8 As shown, a positioning post 33 is mounted on the slide bar 322. An insert rod 331 is movably inserted into the positioning post 33. The bottom of the insert rod 331 is mounted on the limit plate 221. A compression spring 332 is sleeved on the insert rod 331. One end of the compression spring 332 is clamped on the limit plate 221, and the other end of the compression spring 332 is clamped on the end face of the positioning post 33. The cooperation between the compression spring 332 and the positioning post 33 serves the purpose of limiting the position and facilitates reset later.

[0035] The implementation principle of the pressurizing device for testing and inspecting raw materials for highway engineering of the present invention is as follows: Before the test piece is tested, the device is in the initial state, the ball 2 is at a lower position, and the top plate 3 is in the open state of the through hole 211. When the test piece needs to be pressurized: For rectangular specimen testing, the operator first places the rectangular specimen on the surface of ball 2 on base plate 12. The freely rotating nature of ball 2 significantly reduces the friction between the specimen and the base plate, allowing the operator to easily manually push the specimen, quickly moving it directly under pressure plate 11. This design reduces the difficulty and physical effort of manually adjusting the specimen and prevents friction from damaging the specimen surface, which could affect the results of the pressurized test.

[0036] For the detection of circular specimens, the operator starts the drive motor 24 to drive the turntable 23 to rotate. The guide block 231 on the turntable 23, whose height increases from the center to the outside and has the same central angle, squeezes the push rod 22 to slide upward through the cooperation of the slide rail 233 and the slider 223. The push rod 22 drives the connecting cover 21 and the ball 2 to rise, forming an inwardly concave arc-shaped guide surface. After the circular specimen is placed, it will automatically roll to the center of the pressure plate 11 under the action of its own gravity and the rolling action of the ball 2. The height gradient design of the guide block 231 and the arc-shaped guide surface formed by the ball 2 enable the circular specimen to automatically roll to the center of the pressure plate without repeated manual adjustment. This process eliminates human positioning errors, ensures that the specimen is always at the pressure center, significantly improves the repeatability and accuracy of the test data, and is particularly suitable for testing high-strength materials with strict concentricity requirements.

[0037] After the test piece is installed, the operator flips the turntable 23, which in turn causes the top rod 22 to slide downward. The connecting cover 21 on the top rod 22 drives the ball 2 to move downward synchronously. After it moves down to the surface of the bending rod 323, the ball 2 further presses the bending rod 323. When the bending rod 323 is subjected to force, the top slide 322 slides within the strip groove 321 of the rocker arm 32, causing the rocker arm 32 to rotate about the synchronization shaft 312. The torsion spring on the synchronization shaft 312 is compressed, causing the connecting frame 31 and the top plate 3 to flip, completely blocking the through hole 211 and forming a flat and stable support surface.

[0038] At this time, the pressure testing machine 1 is started, and the pressure plate 11 moves downward under the drive of the pressure testing machine 1, and the extrusion block 111 contacts the specimen and applies pressure. The pressure sensor 112 installed on the extrusion block 111 collects pressure data in real time and transmits it to the controller 14 through the wiring harness 141 for processing and display, ensuring that the operator can monitor pressure changes in real time. Since the through hole 211 has been tightly sealed by the top plate 3, the support surface below the specimen is uniform and stable, avoiding the problem of uneven pressure distribution caused by the through hole below, ensuring that the specimen is subjected to balanced force during the pressurization process, and greatly improving the accuracy and reliability of the test results.

[0039] When the test is over, the pressure testing machine 1 stops working and the pressure plate 11 rises and resets. The turntable 23 continues to rotate in the opposite direction, and the top rod 22 moves further down to the initial position under the action of the reset spring 222, and the ball 2 is completely sunk into the base plate 12. At this time, the top plate 3 automatically flips over and resets under the elastic restoring force of the torsion spring, and the through hole 211 reopens, ready for the next specimen inspection. The entire inspection process realizes the full process automation operation from specimen positioning, through hole sealing, pressure detection to equipment reset through the precise linkage between mechanical structures, which not only improves the inspection efficiency, but also reduces manual intervention and human errors, effectively ensuring the efficiency and accuracy of highway engineering raw material testing.

Claims

1. A pressure device for testing and inspecting raw materials for highway engineering, comprising a pressure testing machine (1) and a pressure plate (11) mounted at its output end, characterized in that: A pressure sensor (112) is provided at the bottom of the pressure plate (11), and a base plate (12) is installed on the pressure testing machine (1); The substrate (12) is provided with a through hole (211), and a plurality of balls (2) for guiding the sliding of the test piece are installed in the through hole (211); A plurality of pairs of balls (2) are provided with push rods (22) at the bottom, a turntable (23) is installed on the base plate (12), and a plurality of pairs of guide blocks (231) with slopes (232) are installed around the turntable (23), and the height of the guide blocks (231) gradually increases from the center to the outer edge of the turntable (23), the central angles corresponding to the plurality of pairs of guide blocks (231) are the same, and the push rods (22) are slidably connected to the guide blocks (231); The guide block (231) squeezes the corresponding push rod (22) to slide upward, thereby driving a plurality of pairs of balls (2) to form an arc-shaped surface for guiding the circular test piece to slide to the center position of the pressure plate (11); A top plate (3) is rotatably mounted at the bottom of the through hole (211), and the ball (2) slides downward to press the top plate (3) and flip to seal the through hole (211), thereby balancing the pressure on the test piece.

2. A pressurizing device for testing and inspecting raw materials for highway engineering according to claim 1, characterized in that: The pressure testing machine (1) is provided with a base (13) at the bottom, a fixing seat (131) is provided at the bottom of the base (13), and the fixing seat (131) is in the shape of a boss. Four support frames (132) are provided on the base (13), and the tops of the four support frames (132) are connected to the bottom of the base plate (12). The base plate (12) is provided with four mounting grooves (121) for facilitating connection.

3. A pressurizing device for testing and inspecting raw materials for highway engineering according to claim 1, characterized in that: An extrusion block (111) is installed at the bottom of the pressure plate (11), a pressure sensor (112) is installed on the extrusion block (111), a controller (14) is installed on the pressure testing machine (1), a wiring harness (141) is installed on the connection port of the controller (14), the wiring harness (141) movably passes through the pressure plate (11), and the end of the wiring harness (141) is connected to the pressure sensor (112).

4. A pressurizing device for testing and inspecting raw materials for highway engineering according to claim 1, characterized in that: A detection groove (122) is provided on the base plate (12), and the detection groove (122) is circular. A plurality of pairs of balls (2) are evenly surrounded in the detection groove (122), and a connecting cover (21) is rotatably mounted on the bottom of the balls (2), and the connecting cover (21) movably passes through the through hole (211), and the bottom of the connecting cover (21) is connected to the top rod (22).

5. A pressurizing device for testing and inspecting raw materials for highway engineering according to claim 1, characterized in that: A driving motor (24) is installed at the bottom of the base plate (12), an output shaft of the driving motor (24) movably penetrates the side wall of the base plate (12), and a terminal end of the output shaft is connected to the rotation center of the turntable (23), and corresponding slide rails (233) are provided on the guide block (231) and the turntable (23), a slider (223) is slidably provided on the slide rail (233), and the slider (223) is installed at the bottom of the corresponding push rod (22).

6. A pressurizing device for testing and inspecting raw materials for highway engineering according to claim 1, characterized in that: A limit plate (221) is fixedly installed in the inner cavity of the base plate (12), and the limit plate (221) is located above the turntable (23). The push rod (22) movably passes through the limit plate (221). A return spring (222) is sleeved on the side wall of the push rod (22). One end of the return spring (222) is clamped on the limit plate (221), and the other end of the return spring (222) is clamped on the bottom of the connecting cover (21), and the return spring (222) is in a stretched state.

7. A pressurizing device for testing and inspecting raw materials for highway engineering according to claim 1, characterized in that: A fixing frame (311) is mounted on the base plate (12), a synchronous shaft (312) is fixedly mounted on the fixing frame (311), a connecting frame (31) is rotatably mounted on the synchronous shaft (312), and a torsion spring is sleeved on the synchronous shaft (312), with both ends of the torsion spring being respectively clamped on the fixing frame (311) and the connecting frame (31), a top plate (3) is mounted on the bottom of the connecting frame (31), and the top plate (3) is adapted to the size of the through hole (211).

8. A pressurizing device for testing and inspecting raw materials for highway engineering according to claim 7, characterized in that: A rocker arm (32) is mounted on the synchronization shaft (312), the rocker arm (32) is in an inclined state, a countersunk groove (212) is provided on the base plate (12), the rocker arm (32) is placed inside the countersunk groove (212), and a bending rod (323) is provided on the surface of the rocker arm (32) for vertical sliding.

9. A pressurizing device for testing and inspecting raw materials for highway engineering according to claim 8, characterized in that: The bending rod (323) is L-shaped, and the bottom of the bending rod (323) is placed below the ball (2). A strip groove (321) is provided on the surface of the rocker arm (32), and the strip groove (321) is a through groove. A sliding rod (322) is installed on the top of the bending rod (323), and the sliding rod (322) is movably inserted in the strip groove (321). The diameter of the cross section of the sliding rod (322) is adapted to the width of the strip groove (321).

10. A pressurizing device for testing and inspecting raw materials for highway engineering according to claim 9, characterized in that: A positioning column (33) is installed on the slide bar (322), and an insert rod (331) is movably inserted inside the positioning column (33), and the bottom of the insert rod (331) is installed on the limit plate (221). A compression spring (332) is sleeved on the insert rod (331), and one end of the compression spring (332) is clamped on the limit plate (221), and the other end of the compression spring (332) is clamped on the end face of the positioning column (33).

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