Reinforced concrete pavement testing device
By installing linear actuators and contact blocks on both sides of the test bench, combining the lifting components and load units, the problem of squirting and vibration of the test materials under different sizes is solved, and the stability and accuracy of the test results are achieved.
Patent Information
- Application Number
- CN202422159865.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-04
AI Technical Summary
The existing reinforced concrete pavement test equipment cannot be adjusted and fixed according to the test materials of different sizes, resulting in the test materials being easily rippled and vibrated when applied to rolling loads, affecting the accuracy and safety of the test results.
A reinforced concrete pavement test device is designed, using a linear actuator and contact block installed on both sides of the test bench, and the test material is clamped and fixed by the contact block, and combined with the lifting component and the load unit to simulate the vehicle's driving environment to suppress the twitching and vibration of the test material.
It effectively suppresses the movement of the test materials in the horizontal and vertical directions, improves the stability and accuracy of the test results, and reduces the impact of twitching and vibration on the test results.
Smart Images
Figure CN223155014U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of concrete pavement tests, in particular to a test device for reinforced concrete pavement. Background Technique
[0002] A reinforced concrete pavement is a pavement structure in which longitudinal and transverse steel bars or steel bar meshes are arranged in a common cement concrete pavement slab. Its performance is enhanced by the steel bars, and it has extremely strong load transfer capacity and anti-deformation ability;
[0003] After the reinforced concrete pavement is sprayed with water, its performance will change, and it is prone to be stressed and cracked, so tests need to be carried out before construction;
[0004] However, the existing test equipment for reinforced concrete pavement cannot be adjusted and fixed according to test materials of different sizes and specifications during use. When a rolling load needs to be applied to the test materials through a load unit during the test, the test materials are prone to move. At the same time, since the test materials cannot be completely flat, when the test materials are placed on the test bench, the bottom surface of the test materials will not be able to completely fit the top surface of the test bench. That is to say, when the load unit applies a rolling load to the test materials, the test materials may vibrate and warp, affecting the test results and safety.
[0005] Based on this, the utility model designs a test device for reinforced concrete pavement to solve the above problems. Content of the Utility Model
[0006] To achieve the above object, the utility model provides the following technical solution: A test device for reinforced concrete pavement, including a test bench, a spraying unit, a load unit and a positioning unit. The test bench is used to place the test piece to be tested. The spraying unit is used to spray water on the test piece on the test bench. The load unit is located directly above the test bench and is used to apply a rolling load to the test piece on the test bench. The positioning unit includes a linear actuator that is relatively fixed to the test bench in the horizontal direction and a contact block fixed on the output shaft of the linear actuator. The output shaft of the linear actuator expands and contracts to drive the contact block to approach or move away from the test bench to clamp or release the test piece. There are at least two linear actuators, and the linear actuators are evenly distributed on both sides of the test bench and are opposite to each other.
[0007] As a further scheme of the utility model, a lifting assembly for adjusting the height of the test bench is fixedly arranged at the bottom of the test bench, so that the test bench approaches or moves away from the load unit.
[0008] As a further solution of the present utility model, the load unit includes a column, a mounting plate, a linear moving mechanism and a contact wheel. The column is fixed to the bottom surface of the mounting plate for mounting the mounting plate directly above the test bench. The linear moving mechanism is fixed to the side of the mounting plate facing the test bench for driving the contact wheel to move horizontally.
[0009] As a further solution of the present utility model, the spraying unit includes a water storage tank, a delivery pump and a spray head. The delivery pump is connected to the water storage tank and the spray head respectively through pipelines. There are several spray heads, and several spray heads are evenly distributed on both sides in the width direction of the test bench.
[0010] As a further solution of the present utility model, the top of the water storage tank is open, and the vertical projection of the inner cavity of the water storage tank is larger than the vertical projection of the test bench. The test bench is located above the water storage tank, and the vertical projection of the test bench falls within the vertical projection of the inner cavity of the water storage tank.
[0011] As a further solution of the present utility model, several water leakage grooves penetrating the top and bottom surfaces of the test bench are opened on the surface of the test bench.
[0012] As a further solution of the present utility model, the highest point of the output shaft of the linear actuator is not higher than the lowest point of the contact wheel, and the height difference between the lowest point of the output shaft of the linear actuator and the lowest point of the contact wheel does not exceed 20 cm. At the same time, the height difference between the lowest point of the contact block and the lowest point of the contact wheel does not exceed 20 cm.
[0013] As a further solution of the present utility model, a downward pressing inclined surface is provided on the side of the contact block facing the test bench. The end of the downward pressing inclined surface close to the test bench is higher than the end away from the test bench, and the highest point of the downward pressing inclined surface is higher than the lowest point of the contact wheel.
[0014] As a further solution of the present utility model, the linear moving mechanism adopts a linear module, and the length direction of the guide rail in the linear module is the same as the length direction of the test bench.
[0015] As a further solution of the present utility model, the linear actuator adopts a hydraulic cylinder. Mounting platforms are fixedly arranged at both ends in the length direction of the water storage tank, and the linear actuator is fixed on the mounting platforms.
[0016] The present utility model has the following beneficial effects:
[0017] By installing at least two linear actuators on the side of the test bench, the linear actuators are relatively arranged on both sides of the test bench, and a contact block is installed on the output shaft of the linear actuator. The linear actuator can make the contact block abut against the test piece on the test bench by controlling the movement of the contact block, and clamp and fix the test piece through the contact blocks located on both sides of the test bench. Next, when applying a rolling load to the test piece through the load unit, the test piece will not move horizontally, and effectively suppress the vibration of the test piece in the vertical direction, improve the stability of the test piece during the test, reduce the influence of the movement and vibration of the test piece on the test results, and make the test results more accurate.
[0018] In addition to the purposes, features and advantages described above, the present utility model has other purposes, features and advantages. The following will refer to the drawings and make a further detailed description of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:
[0020] Figure 1 It is a side view schematic diagram of the present utility model.
[0021] Figure 2 It is a front view schematic diagram of the present utility model.
[0022] Figure 3 It is a schematic diagram of the second embodiment of the contact block in the present utility model.
[0023] Figure 4 It is a structural schematic diagram of the water leakage trough of the present utility model.
[0024] Legend:
[0025] 1. Test bench; 11. Lifting assembly; 12. Water leakage trough; 21. Linear actuator; 22. Contact block; 23. Pressing inclined plane; 31. Linear movement mechanism; 32. Contact wheel; 33. Column; 34. Mounting plate; 41. Water storage tank; 42. Delivery pump; 43. Spraying head; 44. Mounting table. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] The following will make a detailed description of the embodiments of the present utility model in conjunction with the drawings. However, the present utility model can be implemented in many different ways defined and covered by the following.
[0027] Please refer to Figures 1-4, the utility model provides a test device for reinforced concrete pavement, which includes a test bench 1, a spraying unit, a loading unit and a positioning unit. During operation, the test piece to be tested is placed on the test bench 1, and the position of the test piece to be tested is fixed by the positioning unit. Subsequently, the test piece to be tested is sprayed with water by the spraying unit while a rolling load is applied to the test piece by the loading unit to simulate the environment of vehicle driving.
[0028] Among them, as Figure 2 shown, the positioning unit includes a linear actuator 21 that is relatively fixed in position with respect to the test bench 1 in the horizontal direction and a contact block 22 fixed on the output shaft of the linear actuator 21. The output shaft of the linear actuator 21 expands and contracts to drive the contact block 22 to approach or move away from the test bench 1 to clamp or loosen the test piece to be tested. There are at least two linear actuators 21, and the linear actuators 21 are evenly distributed on both sides of the test bench 1 and are opposite to each other. The contact blocks 22 located on both sides of the test bench 1 are driven to move by the linear actuators 21 located on both sides of the test bench 1, so that all the contact blocks 22 located on both sides of the test bench 1 move towards the test bench 1, and then contact the test piece placed on the test bench 1 and fix the test piece. Thus, the position of the test piece to be tested on the test bench 1 is fixed. Next, when a rolling load is applied to the test piece to be tested by the loading unit, the test piece to be tested will not move horizontally, and the vibration of the test piece to be tested in the vertical direction is effectively suppressed, improving the stability of the test piece to be tested during the test process, reducing the influence of the movement and vibration of the test piece to be tested on the test result, and making the test result more accurate.
[0029] Among them, as Figure 2 shown, a lifting assembly 11 for adjusting the height of the test bench 1 is fixedly arranged at the bottom of the test bench 1, so that the test bench 1 approaches or moves away from the loading unit. Before placing the test piece to be tested on the test bench 1, the test bench 1 can be moved away from the loading unit by the lifting assembly 11 to provide an operating space for placing the test piece to be tested on the test bench 1. After the test piece to be tested is placed on the test bench 1, the lifting assembly 11 raises the test bench 1 again to make the test piece to be tested approach the loading unit. The lifting assembly 11 can adopt a hydraulic cylinder or a scissor lift or other devices that can lift the test bench 1, which belongs to the conventional technical means in this field, and this application does not limit it.
[0030] Among them, as Figure 2As shown, the load cell includes a column 33, a mounting plate 34, a linear movement mechanism 31, and a contact wheel 32. The column 33 is fixed to the bottom surface of the mounting plate 34 to mount the mounting plate 34 directly above the test bench 1. The linear movement mechanism 31 is fixed to the side of the mounting plate 34 facing the test bench 1 to drive the contact wheel 32 to move horizontally. When the test bench 1 rises, the test specimen placed on the test bench 1 can be brought into contact with the contact wheel 32. During the test, the linear movement mechanism 31 is used to control the contact wheel 32 to reciprocate horizontally, thereby simulating a real vehicle rolling environment, effectively simulating the actual road usage conditions, and improving the accuracy of the test results.
[0031] Among them, as Figure 2 shown, the spraying unit includes a water storage tank 41, a delivery pump 42, and a spray head 43. The delivery pump 42 is connected to the water storage tank 41 and the spray head 43 through pipelines. The delivery pump 42 pumps out the water stored in the water storage tank 41, pressurizes it, and then delivers it to the spray head 43, and then sprays it onto the surface of the test specimen through the spray head 43.
[0032] Specifically, as Figure 2 shown, there are several spray heads 43, and several spray heads 43 are evenly distributed on both sides in the width direction of the test bench 1, so that the spray heads 43 can be closer to the center of the test bench 1 to increase the spray coverage area when the spray heads 43 spray.
[0033] Specifically, as Figure 4 shown, the top of the water storage tank 41 is open, and the vertical projection of the inner cavity of the water storage tank 41 is larger than the vertical projection of the test bench 1. The test bench 1 is located above the water storage tank 41, and the vertical projection of the test bench 1 falls within the vertical projection of the inner cavity of the water storage tank 41. Thus, during the test, the water sprayed by the spraying unit onto the test specimen will drip from the edge of the test bench 1 and re-enter the water storage tank 41, completing the recycling of the sprayed water, reducing waste of resources, and at the same time not requiring additional recovery pipelines and equipment, and not increasing the complexity and cost of the overall device.
[0034] Furthermore, as Figure 4 shown, several water leakage grooves 12 are opened on the surface of the test bench 1 that penetrate through the top and bottom surfaces of the test bench 1. When spraying water onto the surface of the test specimen, the sprayed water will enter the interior of the test specimen, and then pass through the test specimen and leave from the bottom of the test specimen. If the surface of the test bench 1 is a complete plane, the water entering the test specimen will accumulate at the bottom of the test specimen, which does not conform to the actual road conditions. Therefore, several water leakage grooves 12 that penetrate through the top and bottom surfaces of the test bench 1 are opened on the test bench 1, so that the water leaving from the bottom of the test specimen can leave the test bench 1 through the water leakage grooves 12, preventing water from accumulating at the bottom of the test specimen, restoring the actual road environment, and improving the accuracy of the test results.
[0035] Specifically, as Figure 2 shown, the highest point of the output shaft of the linear actuator 21 is not higher than the lowest point of the contact wheel 32, and the height difference between the lowest point of the output shaft of the linear actuator 21 and the lowest point of the contact wheel 32 does not exceed 20 cm. At the same time, the height difference between the lowest point of the contact block 22 and the lowest point of the contact wheel 32 does not exceed 20 cm. Since the height of the contact wheel 32 is fixed, and the test specimen to be tested must come into contact with the contact wheel 32 during the test, thus, regardless of the thickness of the test specimen, the height of the highest point of the test specimen during the test can be determined. The thickness of the test specimen is generally 20 - 25 cm. Then, as long as the highest point of the output shaft of the linear actuator 21 is not higher than the lowest point of the contact wheel 32, and the height difference between the lowest point of the output shaft of the linear actuator 21 and the lowest point of the contact wheel 32 does not exceed 20 cm, it can be ensured that there will be no misalignment in the height direction between the output shaft of the linear actuator 21 and the test specimen during the test. The linear actuator 21 can effectively provide a pressing force for the test specimen through the contact block 22. Similarly, the height difference between the lowest point of the contact block 22 and the lowest point of the contact wheel 32 does not exceed 20 cm to ensure that the contact block 22 will not interfere with the test bench 1. When the test specimen is smaller than the test bench 1, the contact block 22 can also move above the test bench 1 and normally abut against the side surface of the test specimen.
[0036] Furthermore, as Figure 3 shown, a downward pressing inclined surface 23 is provided on the side of the contact block 22 facing the test bench 1. The end of the downward pressing inclined surface 23 close to the test bench 1 is higher than the end far from the test bench 1. The highest point of the downward pressing inclined surface 23 is higher than the lowest point of the contact wheel 32. During the test, the contact block 22 will contact the test specimen through the downward pressing inclined surface 23, and apply a downward inclined force to the test specimen through the downward pressing inclined surface 23. While fixing the position of the test specimen, a downward pressure is applied to the test specimen to press the test specimen downward onto the test bench 1, so as to effectively suppress the vibration of the test specimen in the vertical direction and further improve the stability of the test specimen during the test, and further improve the accuracy of the test results.
[0037] Specifically, as Figure 2 shown, the linear movement mechanism 31 adopts a linear module. The length direction of the guide rail in the linear module is the same as the length direction of the test bench 1. Since the linear actuator 21 is arranged on both sides of the test bench 1 in the length direction, thus, the contact block 22 will contact both ends of the test specimen in the length direction to fix the test specimen. When the contact wheel 32 moves on the surface of the test specimen along the length direction of the test bench 1, if the contact wheel 32 gets stuck due to long-term use, the direction of the frictional force generated during the stuck state is the same as the length direction of the test bench 1, and the direction of the pressure applied by the contact block 22 against the side of the test specimen is also the same as the length direction of the test bench 1, further improving the stability of the test specimen during the test.
[0038] The linear actuator 21 can be a hydraulic cylinder or an electric push rod. Mounting platforms 44 are fixedly arranged at both ends in the length direction of the water storage tank 41, and the linear actuator 21 is fixedly arranged on the mounting platforms 44 to fix the position of the linear actuator 21.
[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A test device for reinforced concrete pavement, comprising a test bench (1), a spraying unit and a loading unit, characterized in that: It further includes a positioning unit; A test bench (1) for placing the specimen to be tested; A spraying unit for spraying water on the specimen to be tested on the test bench (1); A load unit located directly above the test bench (1) for applying a rolling load to the specimen to be tested on the test bench (1); The positioning unit includes a linear actuator (21) that is relatively fixed in position with respect to the test bench (1) in the horizontal direction and a contact block (22) fixed to the output shaft of the linear actuator (21). The output shaft of the linear actuator (21) extends and retracts to drive the contact block (22) to approach or move away from the test bench (1) to clamp or release the specimen to be tested. There are at least two linear actuators (21), and the linear actuators (21) are evenly distributed on both sides of the test bench (1) and are opposite to each other.
2. The test device for a reinforced concrete pavement according to claim 1, wherein: A lifting assembly (11) for adjusting the height of the test bench (1) is fixedly arranged at the bottom of the test bench (1) so that the test bench (1) approaches or moves away from the load unit.
3. The test device for a reinforced concrete pavement according to claim 1, characterized in that: The load unit includes a column (33), a mounting plate (34), a linear moving mechanism (31) and a contact wheel (32). The column (33) is fixed to the bottom surface of the mounting plate (34) for mounting the mounting plate (34) directly above the test bench (1). The linear moving mechanism (31) is fixed to the side of the mounting plate (34) facing the test bench (1) for driving the contact wheel (32) to move horizontally.
4. The test device for a reinforced concrete pavement according to claim 1, characterized in that: The spraying unit includes a water storage tank (41), a delivery pump (42) and a spray head (43). The delivery pump (42) is connected to the water storage tank (41) and the spray head (43) respectively through pipelines; There are several spray heads (43), and the several spray heads (43) are evenly distributed on both sides in the width direction of the test bench (1).
5. The test device for a reinforced concrete pavement according to claim 4, characterized in that: The top of the water storage tank (41) is open, and the vertical projection of the inner cavity of the water storage tank (41) is larger than the vertical projection of the test bench (1). The test bench (1) is located above the water storage tank (41), and the vertical projection of the test bench (1) falls within the vertical projection of the inner cavity of the water storage tank (41).
6. A test device for reinforced concrete pavement according to claim 1, characterized in that: Several water leakage grooves (12) penetrating the top and bottom surfaces of the test bench (1) are formed on the surface of the test bench (1).
7. The test device for a reinforced concrete pavement according to claim 3, characterized in that: The highest point of the output shaft of the linear actuator (21) is not higher than the lowest point of the contact wheel (32), and the height difference between the lowest point of the output shaft of the linear actuator (21) and the lowest point of the contact wheel (32) does not exceed 20 cm. At the same time, the height difference between the lowest point of the contact block (22) and the lowest point of the contact wheel (32) does not exceed 20 cm.
8. An experimental device for a reinforced concrete pavement according to claim 7, characterized in that: A downward pressing inclined surface (23) is formed on the side of the contact block (22) facing the test bench (1). One end of the downward pressing inclined surface (23) close to the test bench (1) is higher than the end away from the test bench (1), and the highest point of the downward pressing inclined surface (23) is higher than the lowest point of the contact wheel (32).
9. The test device for a reinforced concrete pavement according to claim 3, characterized in that: The linear moving mechanism (31) adopts a linear module, and the length direction of the guide rail in the linear module is the same as the length direction of the test bench (1).
10. A test device for a reinforced concrete pavement according to claim 4, characterized in that: The linear actuator (21) adopts a hydraulic cylinder. Mounting platforms (44) are fixedly arranged at both ends of the water storage tank (41) in the length direction, and the linear actuator (21) is fixedly arranged on the mounting platforms (44).