A pressurizing device for highway engineering raw material test detection

Abstract

The present application relates to pressure detection technical field, disclose a kind of pressurizing device for highway engineering raw material test detection, including pressure testing machine and the pressure plate of its output end installation.The present application is aimed at the detection of rectangular test piece, the design of free rotation of ball greatly reduces the friction of test piece adjustment, not only reduces artificial operation difficulty, avoids test piece surface abrasion, but also can complete positioning quickly;For the detection of circular test piece, the unique structure of carousel guide block is linked with ball through height gradient change, automatically accurately guides test piece to the center of pressure plate, completely eliminates artificial positioning error, ensures the high accuracy and repeatability of detection data;After test piece completes positioning, the device is linked with ball through carousel, ejector rod and precision machinery, automatically realizes through-hole plugging, seamlessly connects pressure detection link, ensures that test piece is evenly stressed in pressurizing process, avoids uneven pressure distribution due to through-hole, effectively improves the reliability of detection result.

Description

Technical Field

[0001] This invention belongs to the field of pressure testing technology, specifically, it relates to a pressurization device for testing and inspecting raw materials for highway engineering. Background Technology

[0002] In highway construction, the performance of raw materials directly determines the quality and service life of the project. Therefore, accurate testing and inspection of raw materials are crucial. Among these methods, pressure testing, as a core means of evaluating key indicators such as material strength and compressive strength, has a decisive impact on the accuracy and reliability of the results due to the performance of the testing equipment.

[0003] For rectangular specimens, due to their large size and weight, sliding adjustment on the substrate surface is required during testing to align them with the center of the pressure plate of the compression testing machine. Traditional substrates are mostly fixed planar structures, and the large friction between the specimen and the substrate during sliding not only makes manual adjustment difficult and time-consuming, but also easily causes wear and scratches on the specimen surface, especially for high-strength precast concrete blocks and large asphalt mixture plate specimens. Surface damage directly affects the accuracy of testing key indicators such as material strength and compressive strength, resulting in distorted test data. For circular specimens, due to their special shape, existing equipment usually requires the replacement of a suitable substrate to achieve effective positioning and prevent the circular specimen from rolling off during pressurization. Frequent substrate replacement is not only cumbersome and reduces testing 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] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0006] A pressure testing device for testing raw materials in highway engineering includes a pressure testing machine and a pressure plate installed at its output end.

[0007] A pressure sensor is provided at the bottom of the pressure plate, and a base plate is installed on the pressure testing machine;

[0008] The substrate has through holes, and several ball bearings for guiding the sliding of the test piece are installed in the through holes.

[0009] A plurality of pairs of the ball bearings are provided with a top rod at the bottom. A turntable is mounted on the base plate, and a plurality of pairs of guide blocks with ramps are mounted around the turntable. The height of the guide blocks gradually increases along the direction from the center of the turntable to the outer edge. The central angles corresponding to the plurality of pairs of guide blocks are the same, and the top rods are slidably connected to the guide blocks.

[0010] The guide block presses the corresponding push rod to slide upward, thereby driving several pairs of balls to form an arc-shaped surface for guiding the circular specimen to slide to the center position of the pressure plate;

[0011] A top plate is rotatably mounted at the bottom of the through hole. The ball slides downward to press the top plate to flip and seal the through hole, thus balancing the pressure on the specimen.

[0012] In a preferred embodiment of the present invention, the pressure testing machine is equipped with a base at the bottom, and 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, and the tops of the four support frames are connected to the bottom of the base plate. The base plate is equipped with four mounting slots for easy connection.

[0013] In 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 wire harness is installed on the connection port of the controller, the wire harness movably passes through the pressure plate, and the end of the wire harness is connected to the pressure sensor.

[0014] In a preferred embodiment of the present invention, a detection groove is formed on the substrate, and the detection groove is circular. Several pairs of balls are evenly surrounded in the detection groove, and a connecting cover is rotatably installed at the bottom of the balls. The connecting cover moves through the through hole, and the bottom of the connecting cover is connected to the top rod.

[0015] In a preferred embodiment of the present invention, a drive motor is installed at the bottom of the substrate, the output shaft of the drive motor movably passes through the side wall of the substrate, and the end of the output shaft is connected to the rotation center of the turntable. Corresponding slide rails are provided on the guide block and the turntable, and a slider is slidably arranged on the slide rail. The slider is installed at the bottom of the corresponding top rod.

[0016] In a preferred embodiment of the present invention, a limiting plate is fixedly installed in the inner cavity of the substrate, and the limiting plate is located above the turntable. The push rod moves through the limiting plate. A reset spring is sleeved on the side wall of the push rod. One end of the reset spring is snapped onto the limiting plate, and the other end of the reset spring is snapped onto the bottom of the connecting cover, and the reset spring is in a stretched state.

[0017] In a preferred embodiment of the present invention, a fixing frame is mounted on the substrate, a synchronous shaft is fixedly mounted on the fixing frame, a connecting frame is rotatably mounted on the synchronous shaft, and a torsion spring is sleeved on the synchronous shaft. The two ends of the torsion spring are respectively engaged with the fixing frame and the connecting frame. A top plate is mounted on the bottom of the connecting frame, and the size of the top plate is adapted to the through hole.

[0018] In a preferred embodiment of the present invention, a rocker arm is mounted on the synchronous shaft, the rocker arm is in an inclined state, a countersunk groove is formed on the base plate, the rocker arm is placed inside the countersunk groove, and a bent rod is vertically slidably arranged on the surface of the rocker arm.

[0019] In a preferred embodiment of the present invention, the bent rod is L-shaped, the bottom of the bent rod is placed below the ball bearing, the surface of the rocker arm is provided with a strip groove, the strip groove is a through groove, a slide rod is installed on the top of the bent rod, the slide rod is movably inserted into the strip groove, and the diameter of the cross-section of the slide rod is adapted to the width of the strip groove.

[0020] In a preferred embodiment of the present invention, a positioning post is installed on the slide rod, and a plug rod is movably inserted inside the positioning post. The bottom of the plug rod is installed on a limiting plate, and a compression spring is sleeved on the plug rod. One end of the compression spring is engaged with the limiting plate, and the other end of the compression spring is engaged with the end face of the positioning post.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] For the testing of rectangular specimens, the free-rotating ball bearings significantly reduce friction during specimen adjustment, reducing manual operation difficulty, preventing surface wear, and enabling rapid positioning. For the testing of circular specimens, the unique structure of the turntable guide block, through height gradient changes and linkage with the ball bearings, automatically and precisely guides the specimen to the center of the pressure plate, completely eliminating human positioning errors and ensuring high accuracy and repeatability of test data. After the specimen is positioned, the device automatically seals the through-hole through the precise mechanical linkage of the turntable, push rod, and ball bearings, seamlessly connecting the pressure testing process. This ensures uniform stress on the specimen during pressurization, avoiding uneven pressure distribution caused by through-holes and effectively improving the reliability of test results. From specimen positioning and through-hole sealing to pressure testing and equipment reset, the entire process is fully automated through a sophisticated mechanical structure design. This reduces manual intervention and allows for adjustment of the motor angle to accommodate circular specimens of different diameters, compatible with both rectangular and circular specimen types. This improves testing efficiency, broadens the application range of the equipment, and fully meets the diverse testing needs of highway engineering raw materials.

[0023] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0024] In the attached diagram:

[0025] Figure 1 A three-dimensional structural schematic diagram of a pressure device for testing and inspecting raw materials in highway engineering;

[0026] Figure 2This is a bottom view of a pressure device used for testing and inspecting raw materials in highway engineering.

[0027] Figure 3 A schematic diagram of a partial structure of a pressure device for testing and inspecting raw materials in highway engineering. Figure 1 ;

[0028] Figure 4 This is a cross-sectional view of a pressure device used for testing and inspecting raw materials in highway engineering.

[0029] Figure 5 A schematic diagram of a partial structure of a pressure device for testing and inspecting raw materials in highway engineering. Figure 2 ;

[0030] Figure 6 A schematic diagram of a partial structure of a pressure device for testing and inspecting raw materials in highway engineering. Figure 3 ;

[0031] Figure 7 A pressure device for testing and inspecting raw materials in highway engineering Figure 6 Enlarged view of point A in the middle;

[0032] Figure 8 A pressure device for testing and inspecting raw materials in highway engineering Figure 6 Enlarged view of section B in the middle.

[0033] In the picture:

[0034] 1. Pressure testing machine; 11. Pressure plate; 111. Extrusion block; 112. Pressure sensor; 12. Base plate; 121. Mounting groove; 122. Detection groove; 13. Base; 131. Fixing seat; 132. Support frame; 14. Controller; 141. Wiring harness;

[0035] 2. Ball bearing; 21. Connecting cover; 211. Through hole; 212. Countersunk groove; 22. Push rod; 221. Limiting plate; 222. Return spring; 223. Slider; 23. Turntable; 231. Guide block; 232. Ramp; 233. Slide rail; 24. Drive motor;

[0036] 3. Top plate; 31. Connecting frame; 311. Fixing frame; 312. Synchronous shaft; 32. Rocker arm; 321. Strip groove; 322. Slide rod; 323. Bending rod; 33. Positioning post; 331. Insert rod; 332. Compression spring. Detailed Implementation

[0037] To make the objectives, 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 with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0038] Example 1:

[0039] like Figures 1 to 8 As shown, a pressure testing device for testing raw materials in highway engineering includes a pressure testing machine 1 and a pressure plate 11 installed at its output end.

[0040] 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;

[0041] A through hole 211 is provided on the substrate 12, and a number of ball bearings 2 for guiding the sliding of the test piece are installed in the through hole 211.

[0042] A plurality of pairs of ball bearings 2 are provided with top rods 22 at their bottoms. A turntable 23 is mounted on the base plate 12, and a plurality of pairs of guide blocks 231 with ramps 232 are mounted around the turntable 23. The height of the guide blocks 231 gradually increases along the direction from the center of the turntable 23 to the outer edge. The central angles corresponding to the plurality of pairs of guide blocks 231 are the same, and the top rods 22 are slidably connected to the guide blocks 231. The guide blocks 231 press the corresponding top rods 22 to slide upward, thereby driving the plurality of pairs of ball bearings 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 mounted at the bottom of the through hole 211. The ball bearings 2 slide downward to press the top plate 3 to flip and seal the through hole 211, so that the pressure on the specimen is balanced.

[0043] This linkage structure between the ball bearing 2 and the top plate 3 greatly optimizes the specimen testing process. The ball bearing 2 effectively reduces friction between the specimen and the substrate 12. When placing a rectangular specimen, the operator does not need to push it forcefully; only slight force is required to allow the specimen to slide smoothly along the surface of the ball bearing 2. This avoids surface wear and scratches caused by forceful pushing and pulling, ensuring that the original state of the specimen is not damaged, thus ensuring that the pressure test data accurately reflects the material properties. The automatic sealing design of the through hole 211 in the top plate 3 avoids the problem of the specimen being suspended or insufficiently supported, preventing pressure concentration in local areas. It allows the specimen to obtain uniform support force through the top plate 3 during pressurization, effectively improving the reliability of the test results.

[0044] like Figures 1 to 8As shown in the specific embodiment, the pressure testing machine 1 has a base 13 installed at its bottom, and a fixed seat 131 is installed at the bottom of the base 13. The fixed seat 131 is in the shape of a boss. Four support frames 132 are installed 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 has four mounting slots 121 for easy connection. The stable structure of the base 13 and support frames 132 can effectively resist the vibration generated during the test and prevent the equipment from shaking and affecting the testing accuracy. Even under high pressure testing, the equipment remains stable, providing a reliable basic environment for testing. The design of the mounting slots 121 facilitates the assembly and disassembly of the equipment. When the equipment malfunctions or needs to replace parts, technicians can quickly locate and operate, greatly shortening the repair time and reducing maintenance costs.

[0045] like Figures 1 to 8 As shown, furthermore, a pressing block 111 is installed at the bottom of the pressure plate 11, and a pressure sensor 112 is installed on the pressing 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 passes through the pressure plate 11, and its end is connected to the pressure sensor 112. The cooperation between the pressure sensor 112 and the controller 14 enables real-time monitoring and accurate feedback of pressure data. During the pressurization process, the pressure sensor 112 can sensitively capture pressure changes and quickly transmit the data to the controller 14 through the wiring harness 141. After analyzing and processing the data, the controller 14 clearly displays the pressure value and the trend of change on the display screen, which allows the operator to keep track of the test progress at any time. If any abnormality occurs, the test can be stopped in time to avoid wasting materials and time and ensure the smooth progress of the testing work. The pressure sensor 112 and the controller 14 are existing technologies, and their specific principles will not be described in detail here.

[0046] Example 2:

[0047] The difference between the above embodiments and this embodiment is that: Figures 1 to 8 As shown, a detection groove 122 is formed on the substrate 12, and the detection groove 122 is circular. Several pairs of balls 2 are evenly arranged around the detection groove 122, and a connecting cover 21 is rotatably mounted on the bottom of the balls 2. 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 balls 2 is specifically designed for the detection needs of circular specimens. When the circular specimen is placed on the balls 2, under the combined action of its own gravity and the rolling of the balls 2, it can automatically roll along the most convenient path towards the center of the pressure plate 11. There is no need for manual repeated adjustment of the specimen position, which not only saves detection time, but also eliminates the error caused by human operation, ensuring that the circular specimen is accurately located at the pressure center in each detection, and improving the consistency and accuracy of the detection results.

[0048] like Figures 1 to 8 As shown, in a specific embodiment, a drive motor 24 is mounted on the bottom of the substrate 12. 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 connected to the rotation center of the turntable 23. A guide block 231 and a corresponding slide rail 233 are provided on the turntable 23. A slider 223 is slidably mounted on the slide rail 233 and installed at the bottom of the corresponding top rod 22. The design of the drive motor 24 driving the turntable 23 to rotate achieves automated adjustment of the height of the ball bearing 2. When a circular specimen needs to be tested, the operator only needs to start the drive motor 24. The guide block 231 on the turntable 23, through the cooperation of the slide rail 233 and the slider 223, orderly pushes the top rod 22 upward, causing the ball bearing 2 to form a specific arc surface. The entire process does not require manual adjustment of the ball bearing 2 height, making the operation simple and convenient, while ensuring consistency in each adjustment and improving the stability and reliability of the equipment operation.

[0049] like Figures 1 to 8 As shown, a limiting plate 221 is fixedly installed in the inner cavity of the substrate 12, and the limiting plate 221 is located above the turntable 23. The push rod 22 moves through the limiting plate 221, and a return spring 222 is sleeved on the side wall of the push rod 22. One end of the return spring 222 is snapped onto the limiting plate 221, and the other end of the return spring 222 is snapped onto the bottom of the connecting cover 21, and the return spring 222 is in a stretched state. The combination of the return spring 222 and the limiting plate 221 provides a reliable guarantee for the reset of the ball 2.

[0050] Example 3:

[0051] The difference between the above embodiments and this embodiment is that: Figures 1 to 8 As shown, a mounting bracket 311 is installed on the base plate 12. A synchronous shaft 312 is fixedly mounted on the mounting bracket 311. A connecting bracket 31 is rotatably mounted on the synchronous shaft 312, and a torsion spring is sleeved on the synchronous shaft 312. The two ends of the torsion spring are respectively engaged with the mounting bracket 311 and the connecting bracket 31. A top plate 3 is installed at the bottom of the connecting bracket 31, and the size of the top plate 3 is adapted to the through hole 211. The torsion spring-driven flipping mechanism of the top plate 3 realizes the automatic opening and closing of the through hole 211. During the testing process, the opening and closing of the top plate 3 is completely automatically controlled by the mechanical structure without manual intervention, avoiding inaccurate test results due to human negligence in forgetting to close the through hole 211. It also reduces the workload of operators, improves the automation level of the equipment, and enhances the safety of the testing process.

[0052] like Figures 1 to 8As shown, in a specific embodiment, a rocker arm 32 is mounted on the synchronous shaft 312. The rocker arm 32 is in an inclined state. A countersunk groove 212 is formed on the base plate 12, and the rocker arm 32 is placed inside the countersunk groove 212. A bent rod 323 is vertically slidably mounted on the surface of the rocker arm 32. The bent rod 323 is L-shaped, and its bottom is positioned below the ball bearing 2. A strip groove 321 is formed on the surface of the rocker arm 32. The strip groove 321 is a through groove, and a sliding rod 322 is mounted on the top of the bent rod 323. The sliding rod 322 is movably inserted into the strip groove 321, and the diameter of the cross-section of the sliding rod 322 is adapted to the width of the strip groove 321. The linkage design of the rocker arm 32 and the bent rod 323 cleverly transforms the vertical displacement of the ball bearing 2 into the flipping action of the top plate 3. As the ball bearing 2 moves downward, it compresses and bends the rod 323. Through the sliding of the slide rod 322 within the slot 321, it drives the rocker arm 32 to rotate around the synchronous shaft 312, thereby causing the top plate 3 to flip and seal the through hole 211. The entire transmission process is smooth and natural, requiring no additional power source, reducing energy consumption, and ensuring the timeliness and accuracy of the top plate 3's flipping action.

[0053] like Figures 1 to 8 As shown, furthermore, a positioning post 33 is installed on the slide rod 322, and a plug rod 331 is movably inserted into the positioning post 33. The bottom of the plug rod 331 is installed on the limiting plate 221, and a compression spring 332 is sleeved on the plug rod 331. One end of the compression spring 332 is engaged with the limiting plate 221, and the other end of the compression spring 332 is engaged with 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 subsequent reset.

[0054] The implementation principle of the pressure device for testing and inspecting raw materials in highway engineering according to the present invention is as follows:

[0055] Before specimen testing, the device is in its initial state, with ball bearing 2 in a lower position and top plate 3 in the open state with through hole 211. When pressure testing of the specimen is required:

[0056] For rectangular specimen testing, the operator first places the rectangular specimen on the surface of the ball bearing 2 on the substrate 12. The free rotation of the ball bearing 2 significantly reduces the friction between the specimen and the substrate, allowing the operator to easily and manually push the specimen to move it quickly under the pressure plate 11. This design reduces the difficulty and physical exertion of manually adjusting the specimen and avoids damage to the specimen surface due to friction, which could affect the pressure test results.

[0057] For testing circular specimens, the operator starts the drive motor 24 to rotate the turntable 23. Guide blocks 231 on the turntable 23, with their height increasing from the center outwards and all having the same central angle, work in conjunction with the slide rail 233 and the slider 223 to push the top rod 22 upwards. The top rod 22 then lifts the connecting cover 21 and the ball bearings 2, forming an inwardly concave arc-shaped guide surface. After the circular specimen is placed, it automatically rolls to the center of the pressure plate 11 under its own weight and the rolling action of the ball bearings 2. The height gradient design of the guide blocks 231 and the arc-shaped guide surface formed by the linkage with the ball bearings 2 allow the circular specimen to automatically roll to the center of the pressure plate without repeated manual adjustments. This process eliminates human positioning errors, ensuring the specimen is always at the center of pressure, significantly improving the repeatability and accuracy of the test data, and is especially suitable for testing high-strength materials with stringent concentricity requirements.

[0058] After the above-mentioned test piece is installed, the operator rotates the turntable 23, which in turn pulls the top rod 22 downward. The connecting cover 21 on the top rod 22 causes the ball bearings 2 to move downward synchronously. When the ball bearings 2 reach the surface of the bent rod 323, they further compress the bent rod 323. After the bent rod 323 is subjected to force, the top slide rod 322 slides in the slot 321 of the rocker arm 32, causing the rocker arm 32 to rotate around the synchronous shaft 312. The torsion spring on the synchronous shaft 312 is compressed, causing the connecting frame 31 and the top plate 3 to rotate, completely sealing the through hole 211 and forming a flat and stable support surface.

[0059] At this time, the pressure testing machine 1 starts, and the pressure plate 11 moves downward under the drive of the pressure testing machine 1. 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 for processing and display via the wiring harness 141, 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 under 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.

[0060] When the test ends, 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 its initial position under the action of the reset spring 222, with the ball bearing 2 completely sinking into the base plate 12. At this time, the top plate 3 automatically flips and resets under the elastic restoring force of the torsion spring, and the through hole 211 reopens, preparing for the next specimen inspection. The entire testing process, through precise linkage between mechanical structures, achieves fully automated operation from specimen positioning, through hole sealing, pressure testing to equipment reset. This not only improves testing efficiency but also reduces manual intervention and human error, effectively ensuring the high efficiency and accuracy of testing and inspection of raw materials for highway engineering.

Claims

1. A pressure testing device for highway engineering raw materials, comprising a pressure testing machine (1) and a pressure plate (11) installed 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) has a through hole (211) and a number of balls (2) for guiding the sliding of the specimen are installed in the through hole (211). A top rod (22) is provided at the bottom of several pairs of balls (2), a turntable (23) is installed on the base plate (12), and several pairs of guide blocks (231) with ramps (232) are installed around the turntable (23). The height of the guide blocks (231) gradually increases along the direction from the center of the turntable (23) to the outer edge. The central angles corresponding to several pairs of guide blocks (231) are the same, and the top rod (22) is slidably connected to the guide blocks (231). The guide block (231) presses the corresponding top rod (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); The bottom of the through hole (211) is rotatably mounted with a top plate (3). The ball (2) slides down and presses the top plate (3) to flip and seal the through hole (211), so that the pressure on the specimen is balanced. A fixing frame (311) is installed on the substrate (12). A synchronous shaft (312) is fixedly installed on the fixing frame (311). A connecting frame (31) is rotatably installed on the synchronous shaft (312). A torsion spring is sleeved on the synchronous shaft (312). The two ends of the torsion spring are respectively snapped onto the fixing frame (311) and the connecting frame (31). A top plate (3) is installed at the bottom of the connecting frame (31). The size of the top plate (3) is adapted to the through hole (211). A rocker arm (32) is mounted on the synchronous 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). A bent rod (323) is vertically slidably provided on the surface of the rocker arm (32). The bent rod (323) is L-shaped, and the bottom of the bent rod (323) is placed below the ball (2). The surface of the rocker arm (32) is provided with a strip groove (321), which is a through groove. A slide rod (322) is installed on the top of the bent rod (323). The slide rod (322) is movably inserted into the strip groove (321). The diameter of the cross section of the slide rod (322) is adapted to the width of the strip groove (321). A positioning post (33) is installed on the slide rod (322). A plug rod (331) is movably inserted inside the positioning post (33). The bottom of the plug rod (331) is installed on the limiting plate (221). A compression spring (332) is sleeved on the plug rod (331). One end of the compression spring (332) is engaged with the limiting plate (221), and the other end of the compression spring (332) is engaged with the end face of the positioning post (33).

2. The pressurizing device for testing and inspecting raw materials in highway engineering according to claim 1, characterized in that, The pressure testing machine (1) has a base (13) installed at the bottom, and a fixed seat (131) is installed at the bottom of the base (13). The fixed seat (131) is in the shape of a boss. Four support frames (132) are installed on the base (13). The top of the four support frames (132) is connected to the bottom of the base plate (12). The base plate (12) has four mounting slots (121) for easy connection.

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

4. The pressurizing device for testing and inspecting raw materials in highway engineering according to claim 1, characterized in that, The substrate (12) has a detection groove (122) and the detection groove (122) is circular. Several pairs of balls (2) are evenly surrounded in the detection groove (122). A connecting cover (21) is rotatably installed at the bottom of the balls (2). The connecting cover (21) is movably connected through the through hole (211). The bottom of the connecting cover (21) is connected to the top rod (22).

5. A pressurizing device for testing and inspecting raw materials in highway engineering according to claim 1, characterized in that, A drive motor (24) is installed at the bottom of the substrate (12). The output shaft of the drive motor (24) moves through the side wall of the substrate (12), and the end of the output shaft is connected to the rotation center of the turntable (23). The guide block (231) and the turntable (23) are provided with corresponding slide rails (233). A slider (223) is slidably arranged on the slide rail (233). The slider (223) is installed at the bottom of the corresponding top rod (22).

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

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