A test device for pervious concrete

Abstract

The application discloses a kind of test device of pervious concrete, belong to pervious test field, including the base of right-angle structure, two sides of the base are respectively connected with a side plate, test table is provided in the base, detection space is opened in the test table, the top of the test table is connected with sample dividing table, pressure platform is provided above the sample dividing table, the bottom of the pressure platform is connected with multiple water outlet head, the top of the pressure platform is connected with water inlet assembly, sample dividing assembly is connected in the sample dividing table, the sample dividing table is connected with the stacking assembly that can be stacked in vertical direction after sample dividing concrete sample to carry out multilayer concrete sample water permeation simulation test, the stacking assembly is connected with the circulating assembly that water is recycled in water permeation test.The advantages are: the application can stack multiple sample soils, thereby carrying out water permeation test of different thicknesses of pervious concrete, while recycling water resources, convenient and practical.

Description

Technical Field

[0001] This invention relates to the field of testing technology for permeable concrete, and more particularly to a testing apparatus for permeable concrete. Background Technology

[0002] Permeable cement concrete refers to concrete with a porosity of 15-25%, also known as no-fines concrete.

[0003] Permeable concrete requires permeability testing to determine the appropriate construction thickness. However, this testing involves multiple samples of varying thicknesses, necessitating repeated sample fabrication, which is cumbersome and inefficient. Therefore, this invention addresses this by designing a test device that stacks different numbers of samples to estimate the permeability. A value is then selected from the estimated range, and a final sample is fabricated for precise testing to verify the selected value. This reduces the number of tests and sample fabrications, improving efficiency. Furthermore, repeated testing wastes water resources as it cannot be recycled. Based on these considerations, this invention provides a testing device for permeable concrete. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art, and to propose a test device for permeable concrete.

[0005] A testing device for permeable concrete includes a right-angled base with a side plate connected to each side. A test platform is disposed in the base, and a testing space is provided in the test platform. A sample distribution platform is connected to the top of the test platform, and a pressure application platform is disposed above the sample distribution platform. Multiple water outlets are connected to the bottom of the pressure application platform, and a water inlet assembly is connected to the top of the pressure application platform. A sample distribution assembly is connected to the sample distribution platform, and a stacking assembly is connected to the sample distribution platform to stack the divided concrete samples vertically for multi-layer concrete sample permeability simulation testing. The stacking assembly is connected to a circulation assembly for recycling water in the permeability test. A hydraulic cylinder is connected to the top of the pressure application platform, and the hydraulic cylinder is fixedly connected to the base by multiple bolts.

[0006] In the above-mentioned permeable concrete permeable simulation device, the water inlet component includes a water inlet pipe, which is connected to the top of the pressure platform and passes through the inner wall of the base. The water inlet pipe is connected to a water storage tank on one side outside the base, and a water pump is connected between the water inlet pipe and the water storage tank.

[0007] In the permeable concrete permeability simulation device described above, the sample distribution component includes multiple mutually abutting sample boxes. Each sample box has an opening, and each sample box contains multiple sample plates that divide the sample box into multiple independent sample spaces of equal volume. The four side walls of each sample box and the top of the sample plates are designed as cones, so that when the sample concrete is subjected to pressure from above, it is divided into multiple equal parts and enters the sample spaces. Each sample space has an annular sealing layer connected to its side wall, and the sealing layer is embedded in the four side walls of the sample space.

[0008] In the permeable concrete simulation device described above, the stacking assembly includes multiple connecting shafts 1. Each sample box has four connecting shafts 1 connected to its two sides. The axis connecting the four connecting shafts 1 forms a parallelogram structure, and the geometric center of the parallelogram structure coincides with the geometric center of the side of the sample box. Each pair of adjacent sample boxes has four closely spaced connecting shafts 1 connected to horizontally arranged telescopic rods 1 and 2. The telescopic rod 1 is located above the telescopic rod 2. Each sample box has a connecting shaft 2 connected to the geometric center of its two symmetrical outer side walls. Each connecting shaft has a square groove, and each square groove has a square limiting rod slidably connected to it. A rotating plate is connected to the side of the multiple limiting rods near the side plate. The side plate has an arc-shaped groove that allows the rotating plate to rotate. The rotating plate has multiple limiting holes. Two connecting shafts 2 near the base are connected to a rotating motor. The rotating motor is fixed to the side plate, and the circulation assembly is connected to the rotating motor.

[0009] In the permeable concrete simulation device described above, the circulation component includes two gears connected to the output shafts of two rotating motors. Each gear has a gear meshing below it, and the number of teeth of each gear is greater than that of gear one. An annular external toothed belt is connected to the lower side of each gear. A friction wheel is connected to each side of the external toothed belt, and the friction wheel is connected to the external toothed belt through friction transmission. An annular transmission belt is connected to the side of the external toothed belt near the test bench. The transmission belt passes through the side wall of the test bench, and the two transmission belts are connected to a connecting shaft three. The connecting shaft three is connected to a push plate, which is slidably and sealed in the detection space. A circulation port is opened on the side of the detection space away from the push plate. A circulation pipe is sealed and connected to the circulation port, and the other end of the circulation pipe is connected to the bottom of the water storage tank. A one-way valve is connected to the circulation pipe. A connection port is opened at the bottom of the push plate, and a one-way valve is sealed and connected to the connection port.

[0010] In the permeable concrete permeable simulation device described above, the limiting hole is square and its size matches that of the limiting rod. The rotating plate has multiple circular grooves, and a circular shaft is rotatably connected to each of the circular grooves. Each limiting hole is opened on a circular shaft. An inclined groove is provided on one side of the limiting hole. A wedge block is connected to the end of the limiting rod. The wedge surface of the wedge block has the same inclination angle as the inclined groove.

[0011] Compared with existing technologies, the advantages of this invention are:

[0012] 1. This invention can divide the permeable concrete into multiple samples with the same area and thickness, and each sample is placed in a mutually isolated sample space. In this way, multiple samples can be tested simultaneously through multiple water outlets above, as well as the pressure platform and sealing layer, which improves the testing efficiency. Compared with the repeated tests in the prior art, it improves the testing speed and efficiency and is convenient to use.

[0013] 2: This invention uses a stacking component to stack any number of samples, thereby obtaining multiple estimated thickness values. After selecting a value within two estimated intervals, accurate testing is performed. This effectively avoids the problem of repeatedly preparing concrete samples of different thicknesses for permeability testing.

[0014] 3: When in use, this invention incorporates a circulation component that automatically collects the water after each water permeability test and outputs it for the next test, thus recycling water and saving water resources. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the mechanism from a first-view perspective in the test device for permeable concrete proposed in this invention.

[0016] Figure 2 This is a schematic diagram of the mechanism from a second perspective in the experimental device for permeable concrete proposed in this invention.

[0017] Figure 3 This is a schematic diagram of the sample distribution component in a permeable concrete testing device proposed in this invention.

[0018] Figure 4 This is a schematic diagram of the circulation component in a permeable concrete test device proposed in this invention.

[0019] Figure 5 This is a schematic diagram of the water outlet head in a permeable concrete test device proposed in this invention.

[0020] Figure 6 This is a schematic diagram of the water inlet component in a permeable concrete test device proposed in this invention.

[0021] Figure 7 This is a schematic diagram of the side plate in a permeable concrete test device proposed in this invention.

[0022] Figure 8 for Figure 7 An enlarged schematic diagram of part A in the middle.

[0023] Figure 9 This is a cross-sectional view of the sealing component in a permeable concrete test apparatus proposed in this invention.

[0024] Figure 10 This is a schematic diagram of the limiting rod and square groove in a permeable concrete test device proposed in this invention.

[0025] Figure 11 This is a schematic diagram of the stacking of sample boxes in a permeable concrete testing device proposed in this invention.

[0026] In the diagram: 1. Base, 2. Test bench, 21. Detection space, 3. Sample distribution table, 4. Pressure application platform, 5. Water outlet, 6. Water inlet assembly, 61. Water inlet pipe, 62. Water storage tank, 7. Sample distribution assembly, 71. Sample distribution box, 72. Sample distribution plate, 73. Sample space, 74. Sealing layer, 8. Stacking assembly, 81. Connecting shaft one, 82. Telescopic rod one, 83. Telescopic rod two, 84. Connecting shaft two, 85. Square groove, 86. Limiting rod, 87. Rotating plate, 88. Arc groove, 89. Limiting hole, 810. Rotating motor, 811. Wedge block, 9. Circulation assembly, 91. Gear one, 92. Gear two, 93. External toothed belt, 94. Friction wheel, 95. Connecting shaft three, 96. Push plate, 97. Circulation port, 98. Circulation pipe, 99. Transmission belt, 910. Connecting port, 10. Hydraulic cylinder, 111. Circular groove, 112. Circular shaft, 113. Inclined groove. Detailed Implementation

[0027] Reference Figure 1-11A testing device for permeable concrete includes a right-angled base 1 with a side plate connected to each side of the base 1. A test platform 2 is disposed in the base 1, and a testing space is provided in the test platform 2. A sample distribution platform 3 is connected to the top of the test platform 2, and a pressure application platform 4 is disposed above the sample distribution platform 3. Multiple water outlets 5 are connected to the bottom of the pressure application platform 4, and a water inlet component 6 is connected to the top of the pressure application platform 4. A sample distribution component 7 is connected to the sample distribution platform 3, and the sample distribution platform 3 is connected to a device capable of vertically distributing the divided concrete samples. A stacking assembly 8 is used to perform permeability simulation tests on multi-layer concrete samples. The stacking assembly 8 is connected to a circulation assembly 9 for recycling water in the permeability test. A hydraulic cylinder 10 is connected to the top of the pressure platform 4 and is fixedly connected to the base 1 by multiple bolts. The water inlet assembly 6 includes a water inlet pipe 61, which is connected to the top of the pressure platform 4 and passes through the inner wall of the base 1. The water inlet pipe 61 is connected to a water storage tank 62 on one side outside the base 1. A water pump is connected between the water inlet pipe 61 and the water storage tank 62.

[0028] The sample separation assembly 7 includes multiple mutually abutting sample boxes 71, each sample box 71 having an opening. Each sample box 71 contains multiple sample plates 72, which divide the sample box 71 into multiple independent sample spaces 73 of equal volume. The four side walls of each sample box 71 and the top of the sample plate 72 are all designed as cones, so that when the concrete sample is subjected to pressure from above, it is divided into multiple equal parts and enters into the sample spaces 73. Each sample space 73 has an annular sealing layer 74 connected to its side wall to keep the sample side sealed. The sealing layer 74 is embedded in the four side walls of the sample space 73.

[0029] The stacking assembly 8 includes multiple connecting shafts 81. Each sample box 71 has four connecting shafts 81 connected to its two sides. The axes of the four connecting shafts 81 form a parallelogram structure, and the geometric center of this parallelogram structure coincides with the geometric center of the side of the sample box 71. Each pair of adjacent sample boxes 71 has four closely spaced connecting shafts 81 connected to horizontally arranged telescopic rods 82 and 83. Telescopic rod 82 is located above telescopic rod 83. The function of telescopic rods 82 and 83 is to limit the rotation of the multiple sample boxes 71, ensuring they remain parallel during rotation. During sample stacking, they can extend to prevent rotational obstruction, and after rotating to a vertical position, they can retract to keep two adjacent sample boxes 71 in a close and sealed state, facilitating testing. The geometric centers of the two symmetrical outer walls of each sample box 71 are connected to a... Each connecting shaft 84 has a square groove 85, and a square limiting rod 86 is slidably connected in each square groove 85. The square structure achieves the effect of rotation limiting. A rotating plate 87 is connected to the side of the multiple limiting rods 86 near the side plate. The side plate has an arc-shaped groove 88 to allow the rotating plate 87 to rotate. The rotating plate 87 is connected to multiple limiting holes 89. A rotating motor 810 is connected to each of the two connecting shafts 84 near the base 1. The rotating motor 810 causes the connecting shafts 84 to rotate, thereby driving the rotating plate 87 to rotate and realize the stacking function. The rotating motor 810 is fixed to the side plate. The circulation component 9 is connected to the rotating motor 810. A wedge block 811 is connected to the end of each limiting rod 86. The wedge block 811 cooperates with the limiting hole 89. A spring is connected to the side of the limiting rod 86 located in the square groove 85. The other end of the spring is connected to the inner bottom of the square groove 85.

[0030] The circulation assembly 9 includes two gears 91 connected to the output shafts of two rotating motors 810. Each gear 91 has a gear 92 meshing below it. The number of teeth on each gear 92 is greater than that on the gear 91. An annular external toothed belt 93 is connected to the lower side of each gear 92. A friction wheel 94 is connected to each side of the external toothed belt 93. The friction wheels 94 and the external toothed belt 93 are connected by friction transmission. The external toothed belt 93 moves in a ring along the two friction wheels 94, causing the transmission belt 99 connected to the side of the external toothed belt 93 closest to the test bench 2 to work simultaneously. The transmission belt 99 passes through the side wall of the test bench 2, and both transmission belts 99 are connected to a connecting shaft. The connecting shaft 95 is connected to a push plate 96. The push plate 96 is slidably connected in the detection space 21. A circulation port 97 is opened on the side of the detection space 21 away from the push plate 96. A circulation pipe 98 is sealed and connected in the circulation port 97, and the other end of the circulation pipe 98 is connected to the bottom side of the water storage tank 62. The water in the detection space 21 is circulated through the circulation pipe 98. A one-way valve is connected to the circulation pipe 98. A connection port 910 is opened at the bottom of the push plate 96. A one-way valve is connected in the connection port 910. The one-way valve only allows water to flow in one direction. This ensures that when the push plate 96 moves back and forth, the water in the test bench 2 is pushed directionally into the circulation pipe 98.

[0031] The limiting hole 89 is square and its size matches that of the limiting rod 86. The rotating plate 87 has multiple circular grooves 111, and each circular groove 111 is rotatably connected to a circular shaft 112. Each limiting hole 89 is opened on a circular shaft 112. A sloping groove 113 is provided on one side of the limiting hole 89. A wedge block 114 is connected to the end of the limiting rod 86. The wedge surface of the wedge block 114 has the same inclination angle as the sloping groove 113.

[0032] In use, the sample is first placed flat on the sample dividing platform 3, and then the hydraulic cylinder 10 is activated to lower the pressure platform 4. In this step, the pressure platform relies on the pressure output by the hydraulic cylinder 10 and the multiple pointed cones in the sample dividing component to divide the sample into multiple independent parts of the same volume, which enter into the corresponding sample space 73 and are sealed by the sealing layer 74 in each sample space 73. At this time, the water pump set in the water storage tank 62 outputs water from the water storage tank 62 through the water inlet pipe 61 to multiple water outlets 5, and acts on each sample space 73 respectively, so that the samples in multiple sample spaces 73 can be tested independently. Multiple detection sensors are set in the test platform 2 below the multiple sample spaces 73, which can simultaneously detect the permeability of multiple divided permeable concrete samples.

[0033] This application can also stack multiple samples using the stacking assembly 8 to conduct simulation tests on samples of different thicknesses. The sample distribution box 71 near the base 1 is fixed to the base 1. Multiple telescopic rods 82 and 83 located on the sidewalls of the sample distribution boxes 71 extend by equal lengths, thus releasing the sample distribution boxes 71 from their abutting state and separating them. The limiting rods 86 connected to the sample distribution boxes 71 will slide into the limiting holes 89 in the rotating plate 87 through the inclined groove 113. The telescopic rods 82 and 83 located on the sidewalls of the sample distribution boxes 71 that are not extended will not allow the limiting rods 86 connected to those sample distribution boxes 71 to enter the corresponding limiting holes 89. Then, through… Rotating the rotating plate 87 via the rotating motor 810 will cause multiple limiting rods 86, which cooperate with the limiting holes 89, to drive the connecting shaft 84 to rotate. When the rotating plate 87 rotates 90° clockwise, multiple sample boxes 71 will be distributed at equal distances along the vertical direction. At this time, the first telescopic rod 82 and the second telescopic rod 83 will retract, causing the multiple sample boxes 71 to close together to form an overlapping state. At this time, multiple overlapping sample boxes 71 mean that the thickness of the permeable concrete in the simulation test is many times that of the original. The number of overlaps can be adjusted during the test to facilitate obtaining permeability simulation test data of samples with different thicknesses. Then, according to the needs of the project, a thickness close to the permeability can be selected for accurate permeability testing, reducing the number of tests and making it convenient to use.

[0034] While the water permeability test is being conducted, the circulation component 9 operates synchronously. Each time the rotating plate 87 rotates 90° counterclockwise, it drives the gears 91 and 92 below. Gear 91, as a small gear, allows gear 92 to rotate at a greater amplitude, which in turn drives the outer toothed belt 93. This causes the two transmission belts 99 connected to the outer toothed belt 93 to drive the connecting shaft 95, which is connected to the inner side. When multiple samples are stacked in the stacking component 8, the connecting shaft 95 drives the push plate 96 to move towards the circulation port 97, pushing the water in the test platform 2 into the water storage tank 62. After a single water permeability test, when the stacking component 8 returns to its initial state, the connecting shaft 95 drives the push plate 96 to move away from the circulation port 97, allowing the water in the test platform 2 to enter the other side through the connecting port 910 on the push plate 96. Thus, when the stacking component 8 is stacked again, the water in the test platform 2 is pushed back into the water storage tank 62, facilitating the recycling of water resources.

[0035] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative and not exhaustive. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A test apparatus for permeable concrete, comprising a base (1) with a right-angled structure, characterized in that: The base (1) is connected to a side plate on each side. The base (1) is provided with a test bench (2). The test bench (2) has a test space. The top of the test bench (2) is connected to a sample distribution platform (3). The sample distribution platform (3) is provided above the sample distribution platform (3). The bottom of the pressure platform (4) is connected to multiple water outlets (5). The top of the pressure platform (4) is connected to a water inlet assembly (6). The sample distribution platform (3) is connected to a sample distribution assembly (7). The sample distribution platform (3) is connected to a stacking assembly (8) that can stack the sampled concrete samples vertically to conduct a multi-layer concrete sample permeability simulation test. The stacking assembly (8) is connected to a circulation assembly (9) that circulates water in the permeability test. The top of the pressure platform (4) is connected to a hydraulic cylinder (10), and the hydraulic cylinder (10) is fixedly connected to the base (1) by multiple bolts. The sample separation component (7) includes multiple mutually abutting sample boxes (71), each sample box (71) is open, each sample box (71) is provided with multiple sample plates (72) and the sample box (71) is divided into multiple independent and equal-volume sample spaces (73) by the sample plates (72). The four side walls of each sample box (71) and the top of the sample plates (72) are set in a pointed cone state so that when the sample concrete is subjected to pressure from above, it is divided into multiple samples and enters into the sample space (73). Each sample space (73) is connected to an annular sealing layer (74) on its side wall. The sealing layer (74) is embedded in the four side walls of the sample space (73). Through the multiple water outlets (5) above and the sealing of the pressure platform (4) and the sealing layer (74), multiple samples can be tested at the same time, improving the testing efficiency.

2. The testing apparatus for permeable concrete according to claim 1, characterized in that: The water inlet assembly (6) includes a water inlet pipe (61) which is connected to the top of the pressure platform (4) and passes through the inner wall of the base (1). The water inlet pipe (61) is connected to the water storage tank (62) on one side outside the base (1). A water pump is connected between the water inlet pipe (61) and the water storage tank (62).

3. The testing apparatus for permeable concrete according to claim 2, characterized in that: The stacking assembly (8) includes multiple connecting shafts (81). Each sample box (71) has four connecting shafts (81) connected to its two sides. The axis connecting the four connecting shafts (81) forms a parallelogram structure, and the geometric center of the parallelogram structure coincides with the geometric center of the side of the sample box (71). The four closely spaced connecting shafts (81) on each pair of adjacent sample boxes (71) are respectively connected to a horizontally arranged telescopic rod (82) and a telescopic rod (83). The telescopic rod (82) is located above the telescopic rod (83). The geometric centers of the two symmetrical outer side walls of each sample box (71) are respectively connected to... A connecting shaft (84) is connected to the base (1). Each connecting shaft (84) has a square groove (85) and a square limiting rod (86) is slidably connected in each square groove (85). A rotating plate (87) is connected to one side of the multiple limiting rods (86) near the side plate. An arc groove (88) is provided in the side plate to allow the rotating plate (87) to rotate. Multiple limiting holes (89) are connected in the rotating plate (87). A rotating motor (810) is connected to each of the two connecting shafts (84) near the base (1). The rotating motor (810) is fixed on the side plate. The circulation component (9) is connected to the rotating motor (810).

4. The testing apparatus for permeable concrete according to claim 3, characterized in that: The circulation assembly (9) includes two gears (91) connected to the output shafts of two rotating motors (810). Each gear (91) has a gear (92) meshing below it. The number of teeth of each gear (92) is greater than that of the gear (91). An annular external toothed belt (93) is connected to the lower side of each gear (92). A friction wheel (94) is connected to each side of the external toothed belt (93). The friction wheel (94) is connected to the external toothed belt (93) by friction transmission. An annular transmission belt (99) is connected to the side of the external toothed belt (93) closest to the test bench (2). The transmission belt (99) passes through the test bench. (2) The side wall and the two transmission belts (99) are connected to a connecting shaft three (95), the connecting shaft three (95) is connected to a push plate (96), the push plate (96) is sealed and slidably connected in the detection space (21), the detection space (21) is provided with a circulation port (97) on the side away from the push plate (96), the circulation port (97) is sealed and connected to a circulation pipe (98) and the other end of the circulation pipe (98) is connected to the bottom side of the water storage tank (62), the circulation pipe (98) is connected to a one-way valve, the bottom of the push plate (96) is provided with a connection port (910), the connection port (910) is sealed and connected to a one-way valve.

5. The testing apparatus for permeable concrete according to claim 4, characterized in that: The limiting hole (89) is square and its size matches that of the limiting rod (86). The rotating plate (87) has multiple circular grooves (111) and each circular groove (111) is rotatably connected to a circular shaft (112). Each limiting hole (89) is opened on a circular shaft (112). A sloping groove (113) is provided on one side of the limiting hole (89). A wedge block (114) is connected to the end of the limiting rod (86). The wedge surface of the wedge block (114) has the same inclination angle as the sloping groove (113).

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