A testing device for the permeability performance of concrete in sponge city roads

Abstract

This invention relates to the field of concrete performance testing, and more particularly to a device for testing the permeability performance of concrete for sponge city roads. The device describes a rotating ring within a testing chamber that holds multiple concrete samples of different types. Multiple sets of permeability performance tests are sequentially performed on each sample via spray pipes and a drainage channel in the observation chamber. After each set of tests is completed, the rotating ring lifts the sample upwards, allowing it to undergo a moisture evaporation process, effectively simulating the real-world conditions of frequent rainstorms and sun exposure on road concrete. This invention solves the technical problem that existing permeability performance testing devices cannot simulate the effects of frequent rainstorms and sun exposure on concrete samples, resulting in poor validity of their permeability test results.

Description

Technical Field

[0001] This invention relates to the field of concrete performance testing, and more particularly to a device for testing the permeability of concrete in sponge city roads. Background Technology

[0002] Sponge city, as a new urban stormwater management concept, aims to enhance a city's resilience in handling rainwater. It achieves rainwater infiltration, storage, and purification through technologies such as permeable concrete pavement, thereby alleviating urban flooding, replenishing groundwater, and improving the ecological environment. Permeable concrete, as the core pavement material, is made of coarse aggregate, cement, and special binders. It has a continuous porous structure, enabling highly efficient water permeability. In road applications, it can reduce surface runoff, mitigate the urban heat island effect, and improve driving safety. Therefore, permeability is a key indicator of the road function in sponge cities, directly affecting rainwater infiltration and roadbed stability. Existing permeable concrete pavements... The performance testing equipment works by spraying water onto the surface of a concrete sample to create water accumulation, and then continuously monitoring the rate at which the water permeates through the concrete sample. This testing method can only measure the rate of water penetration through the concrete sample. However, in actual use, road concrete is repeatedly subjected to extreme weather conditions such as heavy rain and sun exposure. Frequent heavy rain and sun exposure significantly weaken the permeable concrete performance through mechanisms such as blockage, erosion, and cracking. This aspect of the testing cannot be completed by existing road concrete permeability testing equipment, resulting in poor validity of the results obtained from testing the permeability of concrete samples. Summary of the Invention

[0003] To overcome the shortcomings of existing road concrete permeability testing equipment, which cannot simulate the effects of frequent rain and sun exposure on concrete samples, resulting in poor validity of permeability test results, this invention provides a sponge city road concrete permeability testing equipment.

[0004] This invention describes a device for testing the permeability of concrete in sponge city roads, comprising a mounting frame, a testing chamber, an observation door, a solenoid valve, a liquid level gauge, a rotating ring, a separator, a movable clamping plate, a gear ring, a motor, gears, a central frame, a spray pipe, and an infrared heating lamp. The testing chamber is mounted on the mounting frame. The testing chamber has an observation door. A drainage channel structure is located at the bottom of the testing chamber. The outlet end of the drainage channel structure is connected to the solenoid valve. A liquid level gauge for measuring the liquid level is located inside the testing chamber. A rotating ring, made of corrosion-resistant rubber, is rotatably connected inside the testing chamber. A side ring groove structure is provided between the front and rear sides of the testing chamber and the rotating ring. The rotating ring has an internal opening... The system includes several placement slots for different concrete samples; several external through-channels on the rotating ring; several grooves on the outer surface of the rotating ring, connecting two side ring slots and aligning adjacent placement slots; partition blocks corresponding to the number and position of the grooves inside the rotating ring; movable clamps for fixing the concrete samples on both sides inserted into each partition block; a gear ring fixed to the rotating ring; a motor installed on the testing chamber; a gear fixed to the motor's output shaft; the gear meshing with the gear ring; a central frame fixed inside the testing chamber; a spray pipe fixed to the bottom of the central frame; and several infrared heating lamps emitting upward thermal radiation installed on the top of the central frame.

[0005] Furthermore, a filter cartridge is connected to the outlet end of the solenoid valve.

[0006] Furthermore, a heightening pad is detachably fixed in the placement groove of the rotating ring, and the heightening pad has an inner through channel structure that connects to the corresponding outer through channel, and a number of guide groove structures that connect to the inner through channel are formed on the surface of the heightening pad.

[0007] Furthermore, drainage grooves are provided on both sides of the partition block.

[0008] Furthermore, a telescopic frame is slidably connected to the central frame; a pressure wheel is rotatably connected to the telescopic frame; a hydraulic push rod for controlling the extension and retraction of the telescopic frame is installed on the central frame; the extension and retraction ends of the hydraulic push rod are jointly fixed to the telescopic frame.

[0009] Furthermore, the surface of the pressure roller has several patterns that simulate the tread pattern of a tire.

[0010] Furthermore, both the telescopic frame and the hydraulic push rod are set to tilt downwards and to the right.

[0011] Furthermore, the testing chamber is equipped with an air extraction channel structure, and the air extraction channel is connected to an external suction device.

[0012] Furthermore, the testing chamber is equipped with a blower.

[0013] Furthermore, the air outlets of the blower are all connected to the observation hatch.

[0014] This invention describes a permeability testing device for concrete in sponge city roads. The testing chamber contains a rotating ring holding multiple concrete samples of different types. Multiple sets of permeability tests are sequentially performed on each sample via spray pipes and a drainage channel in the observation chamber. After each set of tests is completed, the rotating ring lifts the sample upwards, allowing it to undergo a moisture evaporation process. This effectively simulates the real-world conditions of road concrete frequently subjected to heavy rain and intense sunlight. While ensuring that staff can observe the permeability testing of each sample individually, this device improves the efficiency of performing various simulations on multiple concrete samples.

[0015] The present invention describes a permeability testing device for concrete in sponge city roads, which not only solves the technical problem that existing permeability testing devices for road concrete cannot simulate the effects of frequent rain and sun exposure on concrete samples, resulting in poor validity of permeability test results, but also enables permeability testing of multiple different types of concrete samples in the same batch. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram of the detection chamber of the present invention;

[0018] Figure 3 This is a three-dimensional cross-sectional view of the detection chamber of the present invention;

[0019] Figure 4 This is a three-dimensional structural diagram of the rotating ring of the present invention;

[0020] Figure 5 This is a partial three-dimensional structural diagram of the rotating ring of the present invention;

[0021] Figure 6 This is a three-dimensional structural diagram of the separator block of the present invention;

[0022] Figure 7 This is a three-dimensional structural diagram of the height-increasing pad of the present invention;

[0023] Figure 8 This is a three-dimensional structural diagram of the central frame of the present invention.

[0024] Reference numerals: 1-Mounting frame, 2-Test chamber, 201-Drainage channel, 202-Side ring groove, 203-Exhaust channel, 21-Observation chamber door, 22-Solenoid valve, 23-Filter cartridge, 24-Liquid level gauge, 3-Rotating ring, 301-Placement groove, 302-External through channel, 303-Groove, 31-Divider block, 3101-Drainage groove, 32-Modible plate, 33-Raising pad, 3301-Internal through channel, 3302-Guide groove, 41-Gear ring, 42-Motor, 43-Gear, 5-Center frame, 6-Spray pipe, 7-Infrared heating lamp, 81-Telescopic frame, 82-Pressure roller, 8201-Texture, 83-Hydraulic push rod, 9-Air blower, 10-Concrete template. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Example 1

[0027] A device for testing the permeability of concrete in sponge city roads, such as Figures 1-8As shown, the system includes a mounting frame 1, a detection chamber 2, an observation door 21, a solenoid valve 22, a filter cartridge 23, a liquid level gauge 24, a rotating ring 3, a partition block 31, a movable clamping plate 32, a gear ring 41, a motor 42, a gear 43, a central frame 5, a spray pipe 6, and an infrared heating lamp 7. The detection chamber 2 is mounted on the mounting frame 1. The detection chamber 2 is equipped with an observation door 21, which has a glass window. The bottom of the detection chamber 2 has a drainage channel 201 structure. The outlet end of the drainage channel 201 structure of the detection chamber 2 is connected to the solenoid valve 22. A filter cartridge 23 is connected to the outlet end of the solenoid valve 22. The testing personnel need to place a waste liquid collection container below the outlet end of the filter cartridge 23. A liquid level gauge 24 is located at the bottom of the testing chamber 2. A rotating ring 3 is rotatably connected inside the testing chamber 2; the rotating ring 3 is made of corrosion-resistant rubber material. A side ring groove 202 structure is provided between the front and rear sides of the testing chamber 2 and the rotating ring 3. Several placement slots 301 structures are formed around the rotating ring 3. Several external through channels 302 structures are formed on the rotating ring 3. Several recesses are formed on the outer surface of the rotating ring 3. The groove 303 structure connects two side annular grooves 202 and is aligned between two adjacent placement grooves 301. The rotating ring 3 has partition blocks 31 corresponding to the number and position of the grooves 303, separating two adjacent placement grooves 301. Each partition block 31 has a drainage channel 3101 on each side, which guides the water flowing downwards from the upper concrete template 10 towards the side annular grooves 202 on both sides, preventing water from flowing downwards from the upper concrete template 10. Water flows downwards from template 10 to the adjacent concrete template 10 below; a movable clamping plate 32 is inserted into the front and rear sides of each partition block 31; a toothed ring 41 is fixedly connected to the rotating ring 3; a motor 42 is installed on the testing chamber 2; a gear 43 is fixedly connected to the output shaft of the motor 42; the gear 43 meshes with the toothed ring 41; a central frame 5 is fixedly connected inside the testing chamber 2; a spray pipe 6 is fixedly connected to the bottom of the central frame 5, and the inlet end of the spray pipe 6 is connected to a spray water pressurization and delivery device; several infrared heating lamps 7 are installed on the top of the central frame 5.

[0028] like Figure 5 and Figure 7As shown, each placement slot 301 of the rotating ring 3 has a detachable and fixed raising pad 33, and the raising pad 33 has an inner through channel 3301 structure that connects to the corresponding outer through channel 302. The surface of the raising pad 33 has a number of guide grooves 3302 structures that connect to the inner through channel 3301. Part of the water flow passing through the concrete template 10 will flow along the guide grooves 3302 structures to the adjacent inner through channel 3301, reducing the obstruction of the water flow passing through the concrete template 10 by the raising pad 33. When it is necessary to use concrete templates 10 of different thicknesses, the raising pads 33 of different thicknesses are replaced so that the concrete templates 10 are supplemented with the corresponding height by the raising pads 33, so that the surface of all concrete templates 10 is kept flush with the inner surface of the rotating ring 3.

[0029] The following are the operating steps of a sponge city road concrete permeability testing device according to the present invention.

[0030] First, the inspectors removed the movable retaining plates 32 on both sides of each separator 31, and then inserted multiple different types of concrete samples 10 into different placement slots 301 in the rotating ring 3. The rotating ring 3, made of rubber material, sealed and wrapped the sides of the concrete samples 10 inserted into the placement slots 301 in all directions. The concrete samples 10 were supported by the raising pads 33 in the corresponding placement slots 301, ensuring that the surface of all concrete samples 10 was flush with the inner surface of the rotating ring 3. At the same time, the inspectors... The operator inserts each movable plate 32 back into the corresponding partition block 31, so that the movable plates 32 on the front and back sides are brought together and pressed tightly against the surface of the concrete sample 10. The movable plates 32 clamp the corresponding concrete sample 10 into the corresponding placement slot 301, thus completing the insertion of the concrete sample 10. Then, the motor 42 drives the gear 43 to rotate, and the gear 43 meshes with the gear ring 41 to drive the rotating ring 3 to rotate. The rotating ring 3 then moves each concrete sample 10 to the bottom of the test chamber 2 in sequence to carry out multiple sets of water permeability tests.

[0031] Whenever the rotating ring 3 moves a concrete sample 10 to the bottom of the testing chamber 2 for a set of permeability tests, the solenoid valve 22 is initially closed. Then, the externally connected pressurized spray water delivery equipment continuously sprays pressurized water downwards onto the concrete sample 10 through the spray pipe 6, simulating the continuous erosion of road concrete by heavy rain. The spray water continuously accumulates in the testing chamber 2, forming water until it submerges the surface of the concrete sample 10 and rises to the specified height value on the level gauge 24. Then, the solenoid valve 22 switches to the open state. Because the edge area of ​​the rotating ring 3 is in a sealed and tight fit with the bottom of the testing chamber 2, and the height of the groove 303 on the rotating ring 3 is higher than the water level in the testing chamber 2, the water in the testing chamber 2 can only pass through the concrete sample 10, the inner through-channel 3301 of the raising pad 33, the outer through-channel 302 of the rotating ring 3, and the testing chamber 2 in sequence. The system includes a drainage channel 201, a solenoid valve 22, and a filter cartridge 23. The water is discharged downwards in the form of wastewater into a wastewater collection container placed below. During this process, a small amount of material inside the concrete sample 10 will be washed away with the water flow. The filter cartridge 23 filters and intercepts this part of the material carried in the water flow. At the same time, the tester uses a handheld timer to continuously calculate and monitor the time it takes for the water to pass through the concrete sample 10. Once all the water has passed through the concrete sample 10 and been discharged into the wastewater collection container, a set of permeability tests can be completed. After each set of permeability tests is completed, the tester needs to remove the filter cartridge 23 from the solenoid valve 22 and pour out the material intercepted from inside the concrete sample 10. The weight of the poured-out material is then weighed to record the material loss of the concrete sample 10 after each permeability test.

[0032] During a series of permeability tests, if the testers observe that the water in the test chamber 2 cannot pass through the concrete sample 10 for an extended period of time, it proves that the material corresponding to the concrete sample 10 is not suitable for use as road concrete. Therefore, the material of the concrete sample 10 is deemed unusable. At this point, the testers need to operate the motor 42 to control the rotating ring 3 to rotate, aligning one of the grooves 303 of the rotating ring 3 with the drainage channel 201 of the test chamber 2. The water in the test chamber 2 will then pass through the side ring groove 202, the groove 303 of the rotating ring 3, and the drainage channel 201 of the test chamber 2 before being discharged outward, thus completing the cleaning and treatment of the water in the test chamber 2.

[0033] After each set of permeability performance tests is completed, motor 42 controls the rotating ring 3 to rotate, causing the concrete sample 10 that has completed one set of permeability performance tests to rotate counterclockwise from the frontal angle to the lower right area of ​​the testing chamber 2. Then, the next concrete sample 10 rotates to the bottom of the testing chamber 2 for the next set of permeability performance tests. The concrete sample 10 located in the lower right area of ​​the testing chamber 2 is tilted, allowing the water in the concrete sample 10 to flow out tilted to the lower left. The flowing water flows along the drainage channel 3101 of the lower partition block 31 towards the front and rear side ring grooves 202 respectively. After a set of permeability tests is completed, motor 42 controls the rotating ring 3 to rotate again. The rotating ring 3 drives the concrete sample 10, which was originally located in the lower right area of ​​the test chamber 2, to rotate counterclockwise from the frontal angle to the area above the test chamber 2. The infrared heating lamp 7 evaporates the residual moisture inside the concrete sample 10 in the area above the test chamber 2, simulating the real-world simulation of the concrete sample 10 being exposed to the sun. Then, following the above steps, the concrete sample 10 undergoes multiple sets of permeability tests and moisture evaporation, thus effectively simulating the real-world simulation of road concrete frequently subjected to heavy rain and sun exposure.

[0034] This embodiment of a sponge city road concrete permeability testing device can sequentially perform multiple sets of permeability tests and moisture evaporation tests on multiple concrete samples 10. Each concrete sample 10 undergoes multiple simulated rainstorm and sun exposure tests, with the permeability testing and moisture evaporation processes conducted simultaneously. The permeability testing of each concrete sample 10 is performed individually, allowing staff to carefully observe the specific permeability and permeability rate of each sample. Furthermore, while waiting for one sample 10 to complete its permeability treatment, other samples can simultaneously complete their moisture evaporation treatment. This improves the efficiency of performing various simulation treatments on multiple concrete samples 10 while ensuring that staff can observe the permeability testing of each sample individually.

[0035] Example 2, as Figures 1-8As shown, based on the above embodiment 1, a telescopic frame 81 is slidably connected to the central frame 5 in this embodiment; a pressure roller 82 is rotatably connected to the telescopic frame 81; two hydraulic push rods 83 are installed on the central frame 5; the telescopic ends of the two hydraulic push rods 83 are jointly fixed to the telescopic frame 81; several patterns 8201 simulating tire treads are opened on the surface of the pressure roller 82; both the telescopic frame 81 and the hydraulic push rods 83 are set to be tilted to the lower right; when the motor 42 controls the rotating ring 3 to drive the concrete sample 10 that has just completed a set of permeability tests to rotate counterclockwise from the frontal angle to align with the pressure roller 82, the hydraulic push rods 83 push the telescopic frame 81 to drive The pressure roller 82 is pressed against the surface of the concrete sample 10, which is in a wet state with moisture. The hydraulic push rod 83 pushes the pressure roller 82 to apply pressure to the surface of the concrete sample 10. At the same time, the motor 42 controls the rotating ring 3 to drive the concrete sample 10 to rotate back and forth against the pressure roller 82. The pressure roller 82 simulates vehicles passing by on the road and pressing the wet surface of the concrete sample 10. In this way, it can be detected whether the surface material of the concrete sample 10 will fall off after continuous compression when the concrete sample 10 is wet, thus improving the realism of the simulation test of the concrete sample 10.

[0036] Example 3, as Figures 1-8 As shown, based on the above embodiment 1, the detection chamber 2 in this embodiment is equipped with an exhaust channel 203 structure, and the exhaust channel 203 is externally connected to a suction device; three blowers 9 are installed on the detection chamber 2 to blow fresh air downwards; the air outlets of the three blowers 9 are all facing the observation door 21; during the process of evaporating moisture from the concrete sample 10, the water vapor evaporated from the concrete sample 10 will continuously accumulate in the detection chamber 2, and at this time, the external suction device will continuously suck the water vapor accumulated in the detection chamber 2 through the exhaust channel 203 to clean it up. Meanwhile, the blower 9 continuously blows fresh air from the outside towards the observation door 21. This airflow can promptly remove the water vapor adhering to the surface of the observation door 21, preventing the observation door 21 from being obstructed by a large amount of water vapor, thus avoiding obstructing the inspectors' view of the inside of the inspection chamber 2. At the same time, the fresh air from the outside continuously blown into the inspection chamber 2 by the blower 9, in conjunction with the suction work of the suction equipment in the inspection chamber 2, can promptly remove the heat dissipated from the surface of the concrete sample 10 in the inspection chamber 2, preventing the accumulation of a large amount of heat in the inspection chamber 2 from causing significant interference to the test environment temperature of the concrete sample 10.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A device for testing the permeability of concrete in sponge city roads, comprising a mounting frame (1); a testing chamber (2) mounted on the mounting frame (1); an observation door (21) provided on the testing chamber (2); a drainage channel (201) structure provided at the bottom of the testing chamber (2); a solenoid valve (22) connected to the outlet end of the drainage channel (201) structure of the testing chamber (2); and a liquid level gauge (24) for measuring the liquid level height provided inside the testing chamber (2). Its features are, It also includes a rotating ring (3); the rotating ring (3) is rotatably connected inside the testing chamber (2), and the rotating ring (3) is made of corrosion-resistant rubber material; a side ring groove (202) structure is provided between the front and rear sides of the testing chamber (2) and the rotating ring (3); several placement slots (301) structures for placing different concrete samples (10) are opened inside the rotating ring (3); several external through channels (302) structures are opened on the rotating ring (3); several grooves (303) structures are opened on the outer surface of the rotating ring (3), the grooves (303) structures connect two side ring grooves (202), and the grooves (303) structures are aligned with two adjacent placement slots (301). Between 01); the rotating ring (3) is provided with partition blocks (31) corresponding to the number and position of the grooves (303); each partition block (31) is inserted with a movable card plate (32) for fixing the concrete templates (10) on both sides; a toothed ring (41) is fixedly connected to the rotating ring (3); a motor (42) is installed on the detection chamber (2); a gear (43) is fixedly connected to the output shaft of the motor (42); the gear (43) meshes with the toothed ring (41); a central frame (5) is fixedly connected inside the detection chamber (2); a spray pipe (6) is fixedly connected to the bottom of the central frame (5); several infrared heating lamps (7) that emit upward thermal radiation are installed on the top of the central frame (5).

2. The equipment for testing the permeability of concrete in sponge city roads according to claim 1, characterized in that, A filter cartridge (23) is connected to the outlet end of the solenoid valve (22).

3. The equipment for testing the permeability of concrete in sponge city roads according to claim 1, characterized in that, The ring (3) has a detachable heightening pad (33) fixed in the placement groove (301), and the heightening pad (33) has an inner through channel (3301) structure that connects to the corresponding outer through channel (302). The surface of the heightening pad (33) has several guide grooves (3302) that connect to the inner through channel (3301).

4. The equipment for testing the permeability of concrete in sponge city roads according to claim 3, characterized in that, The two sides of the separator (31) are provided with drainage grooves (3101).

5. The equipment for testing the permeability of concrete in sponge city roads according to claim 1, characterized in that, A telescopic frame (81) is slidably connected to the central frame (5); a pressure wheel (82) is rotatably connected to the telescopic frame (81); a hydraulic push rod (83) for controlling the telescopic frame (81) is installed on the central frame (5); the telescopic ends of the hydraulic push rod (83) are fixedly connected to the telescopic frame (81).

6. The equipment for testing the permeability of concrete in sponge city roads according to claim 5, characterized in that, The surface of the pressure roller (82) has several patterns (8201) that simulate the tread pattern of a tire.

7. The equipment for testing the permeability of concrete in sponge city roads according to claim 5, characterized in that, Both the telescopic frame (81) and the hydraulic push rod (83) are set to tilt downward to the right.

8. A testing device for the permeability performance of concrete in sponge city roads according to any one of claims 1-7, characterized in that, The testing chamber (2) is equipped with an air extraction channel (203) structure, and the air extraction channel (203) is connected to an external suction device.

9. The equipment for testing the permeability of concrete in sponge city roads according to claim 8, characterized in that, A blower (9) is installed on the testing chamber (2).

10. A test device for the permeability performance of concrete in sponge city roads according to claim 9, characterized in that, The air outlets of the blower (9) are all aligned with the observation hatch (21).

Images