A road and bridge construction concrete detection device

Abstract

This invention discloses a concrete testing device for road and bridge construction, relating to the field of concrete testing. It includes a sample holder and a movable pressure plate. Vertical plates are fixed to both sides of the upper surface of the sample holder, and top plates are fixed to the top of each of the two vertical plates. A limiting groove for placing concrete blocks is formed at the center of the upper surface of the sample holder. The pressure plate is located above the limiting groove, and a groove is formed at the center of the upper surface of the pressure plate, in which a liquid storage cylinder is fixed. Liquid permeation holes are formed at the groove and at the bottom of the liquid storage cylinder on the lower surface of the pressure plate. A pressure application component and two transmission components are provided above the liquid storage cylinder. The two transmission components are symmetrically arranged on the pressure application component. Each of the two rope-winding rollers has an inner sprocket tooth on one corresponding spoke. This invention achieves simultaneous testing of concrete compressive strength and impermeability, shortens the testing cycle, and restores the stress environment of road and bridge concrete during actual service, improving the comprehensiveness and reliability of the test data.

Description

Technical Field

[0001] This invention relates to the technical field of concrete testing, specifically to a concrete testing device for road and bridge construction. Background Technology

[0002] In the construction of roads and bridges, concrete is a key structural material, and its quality directly determines the overall structural safety, load-bearing capacity, and long-term durability of the project. Therefore, it is necessary to select concrete blocks for testing during construction.

[0003] A prior art concrete testing device for road and bridge construction includes: a longitudinally penetrating strip hole on a support platform; a pressure mechanism positioned directly above the support platform; a sample holder positioned on the support platform; a vibration element positioned below the support platform, passing through the strip hole and abutting against the bottom surface of the sample holder; a clamping component having two clamping plates for clamping concrete test blocks, the two clamping plates being fixedly connected to the sample holder; and a reciprocating drive component connected to the sample holder for providing a horizontal reciprocating force to the sample holder, thereby causing the two clamping plates to generate a lateral force on the concrete test block.

[0004] While the aforementioned technologies can perform high-frequency vibration and lateral force testing on top of load testing of concrete test blocks, making the equipment testing conditions closer to the actual working conditions of road and bridge concrete and improving the reliability of the testing equipment data, road and bridge concrete must simultaneously withstand structural loads and the seepage of rainwater and groundwater during service. Single mechanical performance testing cannot comprehensively evaluate the overall service capacity of concrete. Furthermore, existing testing requires multiple devices to complete mechanical performance and impermeability tests in stages, which cannot simulate the actual working conditions of simultaneous structural pressure and water pressure, resulting in deviations between the test data and the actual service conditions. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a concrete testing device for road and bridge construction to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A concrete testing device for road and bridge construction includes a sample holder and a movable pressure plate. Vertical plates are fixed to both sides of the upper surface of the sample holder, and a top plate is fixed to the top of each of the two vertical plates. A limiting groove for placing concrete blocks is formed at the center of the upper surface of the sample holder. The pressure plate is located above the limiting groove. Pull ropes are connected to both sides of the upper surface of the pressure plate. Rope winding rollers are symmetrically arranged on the upper surface of the top plate. A dual-axis motor is located between the two rope winding rollers. A groove is formed at the center of the upper surface of the pressure plate, and a liquid storage cylinder is fixed in the groove. Liquid permeation holes are formed on the lower surface of the pressure plate at the groove and at the bottom of the liquid storage cylinder.

[0008] Above the liquid storage cylinder is a pressure application component and two transmission components. The two transmission components are symmetrically arranged on the pressure application component. Each of the two rope winding rollers has an inner sprocket tooth on one of its corresponding spokes. The transmission components cooperate with the inner sprocket teeth. The transmission components are used to control the pressure application component to move synchronously with the pressure plate. The pressure application component is used to apply downward pressure to the pressure plate and pressurize the liquid in the liquid storage cylinder, simulating the working condition of concrete bearing both structural load and water pressure in actual engineering.

[0009] Specifically, in this technical solution, a water storage tank is fixed on the upper surface of the sample holder at a vertical plate. A water pump is installed in the water storage tank. The output port of the water pump is connected to a liquid supply hose. The other end of the liquid supply hose is inserted into the outer wall of the liquid storage cylinder. A drain pipe is connected to the bottom of the outer wall of the liquid storage cylinder. The drain pipe passes through the pressure plate and is connected to the top wall of the water storage tank. A solenoid valve is installed on the outside of the drain pipe.

[0010] Specifically, in this technical solution, the base of the dual-axis motor is fixedly connected to the top plate by screws. Both ends of the two rope winding rollers are movably mounted with support plates via shafts. The bottom end of each support plate is fixedly connected to the top plate by screws. The two output ends of the dual-axis motor pass through the corresponding support plates and are connected to the shaft flanges. Guide rods are provided parallel to one side of the two rope winding rollers. The outer walls of the two pull ropes are in contact with the outer walls of the guide rods. A side plate is fixed to the side wall of each support plate. Both ends of the two guide rods are rotatably connected to the corresponding side plates.

[0011] Specifically, the pressure-applying component includes a fixed plate, with a parallel downward-moving plate below the fixed plate. Vertical threaded rods are rotatably installed on both sides of the upper surface of the fixed plate. A hydraulic cylinder is fixed to the center of the upper surface of the fixed plate by screws. The output end of the hydraulic cylinder passes through the fixed plate and is fixed to the upper surface of the downward-moving plate by screws. Arc-shaped support plates are symmetrically fixed on both sides of the lower surface of the downward-moving plate. Arc-shaped pressure blocks are fixed to the bottom ends of the two arc-shaped support plates. The two arc-shaped pressure blocks are symmetrically arranged on the outside of the liquid storage cylinder.

[0012] Specifically, in this technical solution, a plug-in block is fixed at the center of the lower surface of the lower moving plate, and a push plate is connected to the lower surface of the plug-in block through a silicone block. The silicone block is bonded to the plug-in block and the push plate respectively. The diameters of the plug-in block and the push plate are matched with the inner diameter of the liquid storage cylinder. The outer layer of the push plate is covered with a rubber pad.

[0013] Specifically, in this technical solution, a through hole is provided at the center of the top plate, the through hole is on the same axis as the hydraulic cylinder, and the diameter of the through hole is larger than the diameter of the hydraulic cylinder.

[0014] Specifically, in this technical solution, both transmission components include a sleeve. The inner wall of the sleeve is provided with an internal thread. The threaded rod in the pressure application component is threadedly connected to the sleeve. The sleeve passes through the top plate and is rotatably connected through a bearing. A first bevel gear is fixedly sleeved on the outer wall of the sleeve below the top plate. A second bevel gear is meshed with one side of the tooth surface of the first bevel gear. A rotating shaft is fixedly inserted at the center of the second bevel gear. A worm gear is fixedly sleeved on the outer wall of the other end of the rotating shaft. A horizontal worm is meshed with the lower tooth surface of the worm gear.

[0015] Specifically, in this technical solution, telescopic plates are symmetrically fixed to both sides of the lower surface of the top plate by screws. The telescopic ends of the two telescopic plates are fixed to the upper surface of the pressure plate by screws. One end of the worm gear is rotatably connected to the outer wall of the telescopic plate. A fixing block is sleeved on the outer wall of the middle section of the rotating shaft. The top end of the fixing block is fixedly connected to the lower surface of the top plate by screws.

[0016] Specifically, in this technical solution, a small sprocket is fixedly sleeved on the outer wall of the worm gear away from the telescopic plate. The small sprocket is connected to the inner sprocket gear through a transmission chain, and the chain of the transmission chain passes through the top plate.

[0017] Specifically, in this technical solution, an annular groove is formed on the lower surface of the pressure plate outside the liquid permeation hole, a sealing ring is bonded in the annular groove, and a pressure sensor is embedded in the lower surface of the pressure plate on one side of the annular groove.

[0018] In summary, the present invention has the following advantages: by using the liquid storage cylinder and the pressure application component, the compressive strength and impermeability of concrete can be detected simultaneously, which not only eliminates the cumbersome process of multi-device step-by-step operation and shortens the detection cycle, but also accurately restores the stress environment of road and bridge concrete during actual service, and greatly improves the comprehensiveness and reliability of the detection data.

[0019] Meanwhile, the circulating liquid supply between the storage cylinder and the water tank reduces liquid waste during the testing process and allows for rapid discharge of the permeate through the drain pipe, facilitating statistical analysis of the permeate volume by staff and further improving the convenience of the testing operation. Furthermore, the cooperation between the transmission component and the rope winding roller enables the pressure application component to move synchronously with the pressure plate, ensuring that the pressure application component is always in the appropriate position during the application of pressure to the pressure plate, thus ensuring the stability and accuracy of pressure application and avoiding errors in the test results due to positional deviations. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the orthogonal isometric structure of the device of the present invention;

[0021] Figure 2 This is a schematic diagram of the main structure of the device of the present invention;

[0022] Figure 3 This is a schematic cross-sectional view of the sample holder and water tank of the present invention;

[0023] Figure 4 This is a schematic diagram of the rope winding roller and pressure plate structure of the present invention;

[0024] Figure 5 For the present invention Figure 4 Oblique axonometric structural schematic diagram;

[0025] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0026] Figure 7 This is a schematic diagram of the pressure application component and transmission component of the present invention;

[0027] Figure 8 For the present invention Figure 7 Enlarged view of section B in the middle.

[0028] Figure Descriptions: 1. Sample holder; 101. Restriction groove; 102. Vertical plate; 103. Top plate; 1031. Perforation; 104. Water tank; 2. Pressure plate; 201. Telescopic plate; 202. Groove; 203. Liquid storage cylinder; 204. Liquid permeation hole; 205. Annular groove; 2051. Sealing ring; 206. Pressure sensor; 3. Dual-axis motor; 301. Support plate; 302. Rope winding roller; 3021. Inner sprocket teeth; 303. Pull rope; 304. Side plate; 305. Guide rod; 4. Pressure application assembly; 401. Fixing 4011, Threaded rod; 402, Hydraulic cylinder; 403, Lowering plate; 404, Arc-shaped support plate; 405, Arc-shaped pressure block; 406, Insertion block; 4061, Silicone block; 4062, Push plate; 5, Water pump; 501, Liquid supply hose; 502, Drain pipe; 503, Solenoid valve; 6, Transmission assembly; 601, Sleeve; 603, First bevel gear; 604, Second bevel gear; 6041, Rotating shaft; 605, Worm gear; 606, Worm; 6061, Small sprocket; 607, Transmission chain; 608, Fixing block. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] The embodiments of the present invention will now be described.

[0031] It should be noted that all electrical components in the device are controlled by an external controller, and the water tank 104 is equipped with a water filling pipe for operators to add the liquid required for testing.

[0032] In this embodiment, please refer to Figure 1 - Figure 7As shown, a concrete testing device for road and bridge construction includes a sample holder 1 and a movable pressure plate 2. Vertical plates 102 are fixed to both sides of the upper surface of the sample holder 1, and a top plate 103 is fixed to the top of each of the two vertical plates 102. A limiting groove 101 for placing concrete blocks is provided at the center of the upper surface of the sample holder 1 to position the concrete blocks and prevent them from shifting during testing. The pressure plate 2 is located above the limiting groove 101. Pull ropes 303 are connected to both sides of the upper surface of the pressure plate 2. Rope winding rollers 302 are symmetrically arranged on the upper surface of the top plate 103. A dual-axis motor 3 is located between the two rope winding rollers 302. The base of the dual-axis motor 3 is fixedly connected to the top plate 103 by screws. Both ends of the two rope winding rollers 302 are connected by shafts. The rod is movably mounted with a support plate 301. The bottom end of each support plate 301 is fixedly connected to the top plate 103 by screws. The two output ends of the dual-axis motor 3 pass through the corresponding support plate 301 and are connected to the shaft flange. The two rope rollers 302 are provided with guide rods 305 parallel to one side. The outer walls of the two pull ropes 303 are in contact with the outer walls of the guide rods 305. The side wall of each support plate 301 is fixed with a side plate 304. The two ends of the two guide rods 305 are rotatably connected to the corresponding side plate 304. The upper surface of the pressure plate 2 is provided with a groove 202 at the center. The liquid storage cylinder 203 is fixed in the groove 202. The lower surface of the pressure plate 2 is provided with liquid permeable holes 204 at the groove 202 and at the bottom end of the liquid storage cylinder 203.

[0033] A water storage tank 104 is fixed on the upper surface of the sample holder 1 at a vertical plate 102. A water pump 5 is installed in the water storage tank 104. The output port of the water pump 5 is connected to a liquid supply hose 501. The other end of the liquid supply hose 501 is inserted into the outer wall of the liquid storage cylinder 203. The bottom of the outer wall of the liquid storage cylinder 203 is connected to a drain pipe 502. The drain pipe 502 passes through the pressure plate 2 and is connected to the top wall of the water storage tank 104. A solenoid valve 503 is installed on the outside of the drain pipe 502.

[0034] An annular groove 205 is formed on the lower surface of the pressure plate 2 outside the liquid permeation hole 204. A sealing ring 2051 is bonded in the annular groove 205. A pressure sensor 206 is embedded in the lower surface of the pressure plate 2 on one side of the annular groove 205 to monitor the applied pressure value of the structural load in real time. A pressure application component 4 and two transmission components 6 are provided above the liquid storage cylinder 203. The two transmission components 6 are symmetrically arranged on the pressure application component 4. Each of the two rope winding rollers 302 has an inner sprocket tooth 3021 on one spoke of each roller. The transmission component 6 cooperates with the inner sprocket tooth 3021. The transmission component 6 is used to control the pressure application component 4 to move synchronously with the pressure plate 2. The pressure application component 4 is used to apply downward pressure to the pressure plate 2 and pressurize the liquid in the liquid storage cylinder 203 to simulate the working condition of concrete bearing both structural load and water pressure in actual engineering.

[0035] When testing concrete in road and bridge construction, the operator smoothly places the concrete block to be tested into the limiting groove 101, starts the dual-axis motor 3 to rotate forward through the external controller, and drives the rope roller 302 to rotate through the two output ends of the dual-axis motor 3. The pull rope 303 is slowly lowered under the guidance of the guide rod 305, and the pressure plate 2 moves down synchronously under the vertical guidance of the telescopic plate 201 until the sealing ring 2051 on the lower surface of the pressure plate 2 is tightly attached to the upper surface of the concrete block. The pressure sensor 206 feeds back the contact signal to the controller, and the dual-axis motor 3 stops running.

[0036] During the downward movement of the pressure plate 2, the transmission chain 607 between the inner sprocket teeth 3021 and the small sprocket 6061 of the transmission component 6 drives the sleeve 601 to rotate on the top plate 103. When the sleeve 601 rotates, the threaded rod 4011 will drive the pressure application component 4, which consists of the fixed plate 401, the downward moving plate 403, etc., to move down synchronously with the pressure plate 2.

[0037] Next, the water pump 5 starts, and the test liquid in the water storage tank 104 is delivered to the liquid storage cylinder 203 through the liquid supply hose 501. After the liquid in the liquid storage cylinder 203 reaches a certain amount, the liquid supply time can be preset by the controller to measure the amount. The water pump 5 stops working, and then the hydraulic cylinder 402 of the pressure application component 4 is started. The arc-shaped pressure application block 405 will apply downward pressure to the pressure plate 2 to simulate the structural load borne by the concrete of the road bridge. The pressure sensor 206 feeds back the pressure data to the controller in real time to ensure that the pressure value accurately reaches the preset standard. At the same time, the plug block 406 and the push plate 4062 will pressurize the water in the liquid storage cylinder 203. The liquid acts on the concrete block through the liquid permeation hole 204 to simulate the seepage pressure of rainwater and groundwater, realize the synchronous application of structural load and water pressure, and restore the real service conditions of concrete.

[0038] After the pressure holding time reaches the preset value, the controller controls the hydraulic cylinder 402 to slowly retract its extension end, and the arc-shaped pressure block 405 and the push plate 4062 reset synchronously. Then, the solenoid valve 503 is opened, and the liquid in the storage cylinder 203 flows back to the water storage tank 104 through the drain pipe 502 to achieve recycling. When the liquid has completely flowed back, the solenoid valve 503 is closed, the dual-axis motor 3 reverses, the rope roller 302 winds up the pull rope 303, and drives the pressure plate 2 to move up to a safe position. The operator takes out the concrete block and observes whether there are any seepage marks, cracks, etc. on its surface. Combining the pressure data recorded by the controller and the pressure stability during the pressure holding process, the compressive strength and impermeability of the concrete block are comprehensively evaluated.

[0039] This allows for the simultaneous testing of concrete compressive strength and impermeability, eliminating the cumbersome process of multi-device, step-by-step operation, shortening the testing cycle, and accurately reproducing the stress environment of concrete during actual service in roads and bridges, thus significantly improving the comprehensiveness and reliability of the test data.

[0040] Please see Figure 2 and Figure 7 As shown, the pressure application component 4 includes a fixed plate 401, with a parallel downward moving plate 403 below the fixed plate 401. Vertical threaded rods 4011 are rotatably mounted on both sides of the upper surface of the fixed plate 401. A hydraulic cylinder 402 is fixed to the center of the upper surface of the fixed plate 401 by screws. The output end of the hydraulic cylinder 402 passes through the fixed plate 401 and is fixed to the upper surface of the downward moving plate 403 by screws. Arc-shaped support plates 404 are symmetrically fixed on both sides of the lower surface of the downward moving plate 403. Arc-shaped pressure blocks 405 are fixed to the bottom ends of the two arc-shaped support plates 404. The two arc-shaped pressure blocks 405 are symmetrically arranged. Outside the liquid storage cylinder 203, a plug-in block 406 is fixed at the center of the lower surface of the pressure plate 2 to apply structural load. The lower surface of the plug-in block 406 is connected to the push plate 4062 through the silicone block 4061. The silicone block 4061 is bonded to the plug-in block 406 and the push plate 4062 respectively. The silicone block 4061 can provide a buffer for downward pressure. The diameters of the plug-in block 406 and the push plate 4062 are matched with the inner diameter of the liquid storage cylinder 203. The outer layer of the push plate 4062 is covered with a rubber pad to prevent the push plate 4062 from making hard contact with the inner wall of the liquid storage cylinder 203, which would lead to sealing failure.

[0041] A through hole 1031 is provided at the center of the top plate 103. The through hole 1031 is on the same axis as the hydraulic cylinder 402. The diameter of the through hole 1031 is larger than the diameter of the hydraulic cylinder 402, providing clearance space for the lifting and lowering of the hydraulic cylinder 402.

[0042] The controller controls the extension end of the hydraulic cylinder 402 to push the lowering plate 403 downwards synchronously. The lowering plate 403, through the arc-shaped support plate 404, drives the arc-shaped pressure block 405 to apply uniform downward pressure to the pressure plate 2. This pressure is stably transmitted to the concrete block through the pressure plate 2, simulating the structural load borne by the concrete of the road bridge. The pressure sensor 206 feeds back the pressure data to the controller in real time. At the same time, the lowering plate 403 also drives the plug-in block 406, silicone block 4061 and push plate 4062 to move downwards synchronously. The push plate 4062 moves into the opening of the liquid storage cylinder 203 and applies pressure to the liquid inside. Under the action of pressure, the liquid acts evenly on the upper surface of the concrete block through the liquid permeation hole 204, simulating the seepage pressure of rainwater and groundwater, realizing the synchronous application of structural load and water pressure. In this process, the silicone block 4061 plays a buffering role, and the rubber gasket on the outer layer of the push plate 4062 ensures the liquid sealing effect and prevents pressure leakage.

[0043] Please see Figure 7 and Figure 8As shown, both transmission components 6 include a sleeve 601. The inner wall of the sleeve 601 is provided with internal threads. The threaded rod 4011 provided in the pressure application component 4 is threadedly connected to the sleeve 601. The sleeve 601 passes through the top plate 103 and is rotatably connected through a bearing. A first bevel gear 603 is fixedly sleeved on the outer wall of the sleeve 601 below the top plate 103. A second bevel gear 604 is meshed on one side of the tooth surface of the first bevel gear 603. A rotating shaft 6041 is fixedly inserted through the center of the second bevel gear 604. A worm gear 605 is fixedly sleeved on the outer wall of the other end of the rotating shaft 6041. A water... A flat worm gear 606 has two telescopic plates 201 symmetrically fixed to the lower surface of the top plate 103 by screws. The telescopic ends of the two telescopic plates 201 are fixed to the upper surface of the pressure plate 2 by screws. One end of the worm gear 606 is rotatably connected to the outer wall of the telescopic plate 201. A fixing block 608 is sleeved on the outer wall of the middle section of the rotating shaft 6041. The top end of the fixing block 608 is fixedly connected to the lower surface of the top plate 103 by screws. A small sprocket 6061 is fixedly sleeved on the outer wall of the worm gear 606 away from the telescopic plate 201. The small sprocket 6061 is connected to the inner sprocket teeth 3021 through the transmission chain 607. The chain of the transmission chain 607 passes through the top plate 103.

[0044] When the dual-axis motor 3 drives the rope roller 302 to rotate, the inner sprocket teeth 3021 rotate accordingly, driving the small sprocket 6061 to rotate through the transmission chain 607. The rotation of the small sprocket 6061 causes the worm 606 to rotate synchronously. The worm 606 drives the meshing worm wheel 605 to rotate, transmitting power to the rotating shaft 6041, which in turn drives the second bevel gear 604 to rotate. The meshing of the second bevel gear 604 with the first bevel gear 603 causes the sleeve 601 to rotate on the top plate 103. Since the sleeve 601 is threadedly connected to the threaded rod 4011, the rotation of the sleeve 601 is converted into the linear motion of the threaded rod 4011. The two downward-moving threaded rods 4011 push the fixed plate 401 to move downward, thereby realizing that the pressure assembly 4 moves synchronously with the pressure plate 2.

[0045] This ensures that the pressure application component 4 moves accurately and synchronously throughout the entire process of the pressure plate 2 moving up and down. Moreover, the worm gear transmission has good self-locking performance, which ensures that the pressure application component 4 remains stably in the corresponding position after it moves to the corresponding position, and will not be displaced due to minor external vibrations or other factors, thus further improving the stability and accuracy of pressure application.

[0046] The working principle of this invention is as follows:

[0047] When testing concrete in road and bridge construction, the operator smoothly places the concrete block to be tested into the limiting groove 101, starts the dual-axis motor 3 to rotate forward through the external controller, and drives the rope roller 302 to rotate through the two output ends of the dual-axis motor 3. The pull rope 303 is slowly lowered under the guidance of the guide rod 305, and the pressure plate 2 moves down synchronously under the vertical guidance of the telescopic plate 201 until the sealing ring 2051 on the lower surface of the pressure plate 2 is tightly attached to the upper surface of the concrete block. The pressure sensor 206 feeds back the contact signal to the controller, and the dual-axis motor 3 stops running.

[0048] During the downward movement of the pressure plate 2, the small sprocket 6061 is driven to rotate through the inner sprocket teeth 3021 and the transmission chain 607. The rotation of the small sprocket 6061 causes the worm 606 to rotate synchronously. The worm 606 drives the meshing worm wheel 605 to rotate, transmitting power to the rotating shaft 6041, which in turn drives the second bevel gear 604 to rotate. The meshing of the second bevel gear 604 with the first bevel gear 603 causes the sleeve 601 to rotate on the top plate 103. Due to the threaded connection between the sleeve 601 and the threaded rod 4011, the rotation of the sleeve 601 is converted into the linear motion of the threaded rod 4011. The two downward-moving threaded rods 4011 push the fixed plate 401 downward, thereby realizing that the entire pressure application component 4 moves synchronously with the pressure plate 2.

[0049] Next, water pump 5 starts, delivering the test liquid in water tank 104 to liquid storage cylinder 203 through liquid supply hose 501. Once the liquid in liquid storage cylinder 203 reaches a certain amount, the liquid supply time can be preset by the controller to measure the quantity. Water pump 5 then stops working, and hydraulic cylinder 402 of pressure component 4 is started. The telescopic end of hydraulic cylinder 402 extends, pushing the lowering plate 403 to move down synchronously. The lowering plate 403, through arc-shaped support plate 404, drives arc-shaped pressure block 405 to apply uniform downward pressure to pressure plate 2. This pressure is stabilized by pressure plate 2. The pressure is transferred to the concrete block to simulate the structural load borne by the concrete of the road and bridge. The pressure sensor 206 feeds back the pressure data to the controller in real time. At the same time, the lowering plate 403 will also drive the plug block 406, silicone block 4061 and push plate 4062 to move down synchronously. The push plate 4062 moves into the opening of the liquid storage cylinder 203 and applies pressure to the liquid inside. Under the action of pressure, the liquid is evenly applied to the upper surface of the concrete block through the liquid permeation hole 204 to simulate the seepage pressure of rainwater and groundwater, so as to realize the synchronous application of structural load and water pressure.

[0050] After the pressure holding time reaches the preset value, the controller controls the hydraulic cylinder 402 to slowly retract its extension end, and the arc-shaped pressure block 405 and the push plate 4062 reset synchronously. Then, the solenoid valve 503 is opened, and the liquid in the storage cylinder 203 flows back to the water storage tank 104 through the drain pipe 502 to achieve recycling. When the liquid has completely flowed back, the solenoid valve 503 is closed, the dual-axis motor 3 reverses, the rope roller 302 winds up the pull rope 303, and drives the pressure plate 2 to move up to a safe position. The operator takes out the concrete block and observes whether there are any signs of seepage, cracks, etc. on its surface. Combining the pressure data recorded by the controller and the pressure stability during the pressure holding process, the compressive strength and impermeability of the concrete block are comprehensively evaluated.

[0051] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A concrete testing device for road and bridge construction, comprising a sample holder (1) and a movable pressure plate (2), wherein vertical plates (102) are fixed on both sides of the upper surface of the sample holder (1), and top plates (103) are fixed at the top of the two vertical plates (102), characterized in that, The upper surface of the sample holder (1) has a limiting groove (101) for placing concrete blocks at its center. The pressure plate (2) is located above the limiting groove (101). Both sides of the upper surface of the pressure plate (2) are connected to pull ropes (303). The upper surface of the top plate (103) is symmetrically provided with rope winding rollers (302). A dual-axis motor (3) is provided between the two rope winding rollers (302). The upper surface of the pressure plate (2) has a groove (202) at its center. A liquid storage cylinder (203) is fixed in the groove (202). The lower surface of the pressure plate (2) is provided with liquid permeation holes (204) at the groove (202) and at the bottom of the liquid storage cylinder (203). An annular groove (205) is provided on the lower surface of the pressure plate (2) outside the liquid permeation holes (204). A sealing ring (2051) is bonded in the annular groove (205). A pressure sensor (206) is embedded in the lower surface of the pressure plate (2) on one side of the annular groove (205). Above the liquid storage cylinder (203) is a pressure application component (4) and two transmission components (6). The two transmission components (6) are symmetrically arranged on the pressure application component (4). Each of the two rope winding rollers (302) has an inner sprocket tooth (3021) on one of its corresponding spokes. The transmission component (6) cooperates with the inner sprocket tooth (3021). The transmission component (6) is used to control the pressure application component (4) to move synchronously with the pressure plate (2). The pressure application component (4) is used to apply downward pressure to the pressure plate (2) and pressurize the liquid in the liquid storage cylinder (203) to simulate the working condition of concrete bearing structural load and water pressure at the same time in actual engineering. The pressure application component (4) includes a fixed plate (401), with a parallel downward moving plate (403) below the fixed plate (401). Vertical threaded rods (4011) are rotatably installed on both sides of the upper surface of the fixed plate (401). A hydraulic cylinder (402) is fixed to the center of the upper surface of the fixed plate (401) by screws. The output end of the hydraulic cylinder (402) passes through the fixed plate (401) and is fixed to the upper surface of the downward moving plate (403) by screws. Arc-shaped support plates (404) are symmetrically fixed on both sides of the lower surface of the downward moving plate (403). The bottom ends of the two arc-shaped support plates (404) are... An arc-shaped pressure block (405) is fixed, and two arc-shaped pressure blocks (405) are symmetrically arranged on the outside of the liquid storage cylinder (203). A plug-in block (406) is fixed at the center of the lower surface of the lower moving plate (403). A push plate (4062) is connected to the lower surface of the plug-in block (406) through a silicone block (4061). The silicone block (4061) is bonded to the plug-in block (406) and the push plate (4062) respectively. The diameters of the plug-in block (406) and the push plate (4062) are matched with the inner diameter of the liquid storage cylinder (203). The outer layer of the push plate (4062) is covered with a rubber pad. Both of the transmission components (6) include a sleeve (601). The inner wall of the sleeve (601) is provided with an internal thread. The threaded rod (4011) provided in the pressure application component (4) is threadedly connected to the sleeve (601). The sleeve (601) passes through the top plate (103) and is rotatably connected through a bearing. The outer wall of the sleeve (601) is fixedly fitted with a first bevel gear (603) below the top plate (103). A second bevel gear (604) is meshed on one side of the tooth surface of the first bevel gear (603). A rotating shaft (6041) is fixedly passed through the center of the second bevel gear (604). A worm gear (605) is fixedly fitted on the outer wall of the other end of the rotating shaft (6041). A horizontal worm (606) is meshed on the lower tooth surface of the worm gear (605). The lower surface of the top plate (103) is symmetrically fixed with screws on both sides of the telescopic plates (201). The telescopic ends of the two telescopic plates (201) are fixed with screws on the upper surface of the pressure plate (2). One end of the worm (606) is rotatably connected to the outer wall of the telescopic plate (201). The middle section of the shaft (6041) is fitted with a fixing block (608). The top of the fixing block (608) is fixedly connected to the lower surface of the top plate (103) with screws. The outer wall of the worm (606) away from the telescopic plate (201) is fixedly fitted with a small sprocket (6061). The small sprocket (6061) is connected to the inner sprocket teeth (3021) through the transmission chain (607). The chain of the transmission chain (607) passes through the top plate (103).

2. The concrete testing equipment for road and bridge construction according to claim 1, characterized in that, A water tank (104) is fixed on the upper surface of the sample holder (1) at a vertical plate (102). A water pump (5) is installed in the water tank (104). The output port of the water pump (5) is connected to a liquid supply hose (501). The other end of the liquid supply hose (501) is inserted into the outer wall of the liquid storage cylinder (203). The bottom of the outer wall of the liquid storage cylinder (203) is connected to a drain pipe (502). The drain pipe (502) passes through the pressure plate (2) and is connected to the top wall of the water tank (104). A solenoid valve (503) is installed on the outside of the drain pipe (502).

3. The concrete testing equipment for road and bridge construction according to claim 1, characterized in that, The base of the dual-axis motor (3) is fixedly connected to the top plate (103) by screws. Both ends of the two rope winding rollers (302) are movably mounted with support plates (301) through shafts. The bottom end of each support plate (301) is fixedly connected to the top plate (103) by screws. The two output ends of the dual-axis motor (3) pass through the corresponding support plates (301) and are connected to the shaft flanges. A guide rod (305) is provided parallel to one side of the two rope winding rollers (302). The outer walls of the two pull ropes (303) are in contact with the outer walls of the guide rods (305). A side plate (304) is fixed to the side wall of each support plate (301). Both ends of the two guide rods (305) are rotatably connected to the corresponding side plates (304).

4. The concrete testing equipment for road and bridge construction according to claim 1, characterized in that, A through hole (1031) is provided at the center of the top plate (103). The through hole (1031) is on the same axis as the hydraulic cylinder (402). The diameter of the through hole (1031) is larger than the diameter of the hydraulic cylinder (402).

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