Detachable pervious concrete permeability coefficient testing device

Abstract

The utility model is applicable to the technical field of concrete permeability testing, and provides a detachable permeable concrete permeability coefficient testing device which comprises a plurality of overflow boxes, testing structures are arranged in the overflow boxes, each two testing structures comprise two middle columns, the two middle columns are spliced to form a testing cylinder, and the middle columns are arranged in the testing cylinder. The inner wall face of the middle column body is fixedly connected with a thick rubber film, and the top of the thick rubber film is fixedly connected with an upper column body. According to the detachable pervious concrete permeability coefficient testing device, water flow is guided through the upper column body, uniform distribution of the water flow is ensured, a stable water pressure environment is provided for testing through the arranged overflow pipe and constant water head, the middle column body is a test block placing area, and the thick rubber film simulates the actual pervious environment of pervious concrete; the water flow stability and the sealing performance of the device are guaranteed, and the device is convenient to disassemble, suitable for the square pervious concrete and convenient and fast to disassemble and transport.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete permeability testing, in particular to a detachable permeable concrete permeability coefficient testing device. Background Art

[0002] The permeability coefficient test is designed to quantify the rate at which permeable concrete allows water to pass through its structure. It is usually expressed as the amount of water passing through a unit area per unit time. This indicator is crucial for evaluating the performance of permeable concrete in stormwater management, reducing urban flooding, and improving water quality. The permeability coefficient of permeable concrete is affected by many factors, including porosity, aggregate particle size, cement slurry dosage, mix ratio, and construction technology.

[0003] In the prior art, during the production and processing of permeable concrete, a testing device is required to detect the permeability coefficient of concrete. However, the existing permeability coefficient testing devices for permeable concrete are mostly integrated molding settings during use, which is not conducive to the transfer and transportation operation of the testing device, and is further not conducive to the testing and use of permeable concrete. Utility Model Content

[0004] The utility model provides a detachable permeable concrete permeability coefficient testing device, which aims to solve the problem that the existing permeable concrete permeability coefficient testing devices are mostly integrated during use, which is not conducive to the transfer and transportation operation of the testing device.

[0005] The utility model is realized as follows: a detachable permeable concrete permeability coefficient test device includes a plurality of overflow boxes, wherein a test structure is placed inside the overflow box, two of the test structures include two middle columns, and the two middle columns are spliced together to form a test tube, the inner wall surface of the middle column is fixedly connected to a thick rubber membrane, and the top of the thick rubber membrane is fixedly connected to an upper column;

[0006] The bottom of the middle column is fixedly connected to a base, the inner wall of the upper column is fixedly connected to a sealing rubber strip, one side wall of the upper column is connected to an overflow pipe, the bottom of the side wall of the overflow box is connected to a drain pipe, a placement plate is provided below the overflow pipe, and a measuring cylinder is provided on the upper surface of the placement plate through a pressure sensor.

[0007] Preferably, it also includes a water storage tank, which is arranged above the multiple overflow boxes. The bottom of the overflow box is connected to a plurality of water injection pipes, and the multiple water injection pipes correspond one-to-one to the multiple overflow boxes. The water injection pipes are located above the test barrel, and an electric valve is provided on the water injection pipes.

[0008] Preferably, it further comprises a control component, the input end of the control component is electrically connected to the plurality of pressure sensors, and the output end of the control component is electrically connected to the plurality of electric valves.

[0009] Preferably, the overflow box, the base, the middle column and the upper column are all made of transparent materials.

[0010] Preferably, the side wall of the base is provided with a plurality of openings.

[0011] Preferably, a plurality of buckles are fixedly connected to the surface of one of the middle columns, and a clamping block adapted to the buckles is provided on the surface of the other middle column.

[0012] Beneficial effects

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is a detachable permeable concrete permeability coefficient testing device, which guides the water flow through the upper column to ensure the uniform distribution of the water flow, and through the overflow pipe, the constant water head provides a stable water pressure environment for the test. The middle column is the test block placement area, and the thick rubber membrane simulates the actual permeable environment of the permeable concrete to ensure the reliability of the test results. The overflow bucket is composed of two middle columns, and is connected to the block by a buckle to ensure that the two parts are firmly connected, and cooperates with the sealing rubber strip and the thick rubber membrane to prevent water leakage, thereby ensuring the water flow stability and sealing of the device. It is easy to disassemble and is suitable for square permeable concrete. The disassembly and transportation operations are relatively convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the front structure of the utility model;

[0015] Figure 2 This is a schematic structural diagram of the middle column and the upper column in the utility model;

[0016] Figure 3 This is a structural diagram of the upper column and overflow pipe in the utility model.

[0017] In the figure: 1. Overflow box; 2. Base; 3. Middle column; 4. Upper column; 5. Thick rubber membrane; 6. Control component; 7. Sealing rubber strip; 8. Block; 9. Buckle; 10. Overflow pipe; 11. Drain pipe; 12. Placement tray; 13. Pressure sensor; 14. Measuring cylinder; 15. Water tank; 16. Water filling pipe; 17. Electric valve. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] See also Figure 1-3 The utility model provides a technical solution: a detachable permeable concrete permeability coefficient test device, comprising a plurality of overflow boxes 1, wherein a test structure is placed inside the overflow box 1, and two test structures include two middle columns 3, which are spliced together to form a test tube, and the inner wall surface of the middle column 3 is fixedly connected to a thick rubber membrane 5, and the top of the thick rubber membrane 5 is fixedly connected to an upper column 4;

[0020] The bottom of the middle column 3 is fixedly connected to the base 2, the inner wall of the upper column 4 is fixedly connected to the sealing rubber strip 7, the side wall of one upper column 4 is connected to the overflow pipe 10, the bottom of the side wall of the overflow box 1 is connected to the drain pipe 11, and a placement tray 12 is provided below the overflow pipe 10. The upper surface of the placement tray 12 is provided with a measuring cylinder 14 through a pressure sensor 13.

[0021] The upper column 4 guides the water flow to ensure uniform distribution of the water flow, and through the overflow pipe 10, the constant water head provides a stable water pressure environment for the test. The middle column 3 is the test block placement area, and the thick rubber membrane 5 simulates the actual permeable environment of permeable concrete to ensure the reliability of the test results.

[0022] The overflow bucket consists of two central columns 3, which are connected by a buckle 9 and a block 8 to ensure that the two parts are firmly connected. It is also equipped with a sealing rubber strip 7 and a thick rubber membrane 5 to prevent water leakage, ensuring the water flow stability and sealing of the device. It is easy to disassemble and is suitable for square permeable concrete. The disassembly and transportation operations are relatively convenient.

[0023] Furthermore, it also includes a water storage tank 15, which is arranged above multiple overflow boxes 1. The bottom of the overflow box 1 is connected to several water injection pipes 16. The multiple water injection pipes 16 correspond one-to-one to the multiple overflow boxes 1. The water injection pipes 16 are located above the test barrel, and an electric valve 17 is provided on the water injection pipes 16.

[0024] Furthermore, it also includes a control component 6 , an input end of the control component 6 is electrically connected to a plurality of pressure sensors 13 , and an output end of the control component 6 is electrically connected to a plurality of electric valves 17 .

[0025] In this embodiment, the overflow buckets are placed under the water filling pipe 16 respectively. After the water tank 15 is filled with water, the electric valve 17 is opened through the control component 6. After the water flows out evenly from the overflow pipe 10, the measuring cylinder 14 is placed under the drain pipe 11 to receive the outflowing water. When the pressure sensor 13 under the measuring cylinder 14 detects a change in the mass of the measuring cylinder 14, it means that the water has flowed out, and the control component 6 starts the technology. When the pressure sensor 13 detects that the mass of the measuring cylinder has increased by 100g, the control component 6 records the time and closes the corresponding electric valve 17. When all the pressure sensors 13 reach 100g, the control component 6 stops timing and closes all the electric valves 17. The experiment ends, and the control component 6 outputs the corresponding time t, water permeability coefficient mm / s and indoor temperature ℃.

[0026] The principle of calculating the water permeability coefficient by the control component 6 is as follows:

[0027]

[0028] Where:

[0029] k T ——Water permeability coefficient of the sample when the water temperature is T℃ mm / s

[0030] Q——the amount of water collected in t seconds mm3

[0031] L——Thickness of the sample (mm)

[0032] A——the upper surface area of the sample mm2

[0033] H——water level difference (mm)

[0034] t——time s

[0035] During the test, when the pressure sensor 41 detects that the mass of the measuring cylinder 3 changes to 100g in the overflow pipe, the console records the required time t. The amount of water Q collected at this time is converted to 100mm3 in the overflow pipe according to the water density, and the above formula becomes:

[0036]

[0037] A and L are determined by the shape of the test block, and H is determined by the device.

[0038] Furthermore, the overflow box 1, the base 2, the middle column 3 and the upper column 4 are all made of transparent materials.

[0039] Furthermore, a plurality of openings are provided on the side wall of the base 2 , which facilitate the water that has penetrated the concrete to be discharged through the drainage pipe 11 .

[0040] Furthermore, a plurality of buckles 9 are fixedly connected to the surface of one middle column 3 , and a clamping block 8 adapted to the buckles 9 is provided on the surface of the other middle column 3 .

[0041] The working principle and usage process of the utility model: After the utility model is installed, the upper column 4 guides the water flow to ensure the uniform distribution of the water flow, and through the overflow pipe 10, the constant water head provides a stable water pressure environment for the test. The middle column 3 is the test block placement area, and the thick rubber membrane 5 simulates the actual permeable environment of permeable concrete to ensure the reliability of the test results. The overflow barrel is composed of two middle columns 3, and is connected with the block 8 through the buckle 9 to ensure that the two parts are firmly connected, and cooperate with the sealing rubber strip 7 and the thick rubber membrane 5 to prevent water leakage, thereby ensuring the water flow stability and sealing of the device. It is easy to disassemble and is suitable for square permeable concrete. The disassembly and transportation operations are relatively convenient.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A detachable permeable concrete permeability coefficient testing device, comprising a plurality of overflow boxes (1), characterized in that: A test structure is placed inside the overflow box (1), wherein the two test structures include two middle columns (3), and the two middle columns (3) are spliced together to form a test cylinder, wherein the inner wall surface of the middle column (3) is fixedly connected to a thick rubber membrane (5), and the top of the thick rubber membrane (5) is fixedly connected to an upper column (4); The bottom of the middle column (3) is fixedly connected to a base (2), the inner wall surface of the upper column (4) is fixedly connected to a sealing rubber strip (7), a side wall of the upper column (4) is connected to an overflow pipe (10), the bottom of the side wall of the overflow box (1) is connected to a drain pipe (11), a placement tray (12) is provided below the overflow pipe (10), and a measuring cylinder (14) is provided on the upper surface of the placement tray (12) via a pressure sensor (13).

2. A detachable permeable concrete permeability coefficient testing device according to claim 1, characterized in that: The invention also includes a water storage tank (15), the water storage tank (15) is arranged above the plurality of overflow boxes (1), the bottom of the overflow box (1) is connected to a plurality of water injection pipes (16), the plurality of water injection pipes (16) correspond one to one with the plurality of overflow boxes (1), the water injection pipes (16) are located above the test cylinder, and an electric valve (17) is provided on the water injection pipes (16).

3. The detachable permeable concrete permeability coefficient testing device according to claim 2, characterized in that: It also includes a control component (6), wherein the input end of the control component (6) is electrically connected to the plurality of pressure sensors (13), and the output end of the control component (6) is electrically connected to the plurality of electric valves (17).

4. The detachable permeable concrete permeability coefficient testing device according to claim 1, characterized in that: The overflow box (1), the base (2), the middle column (3) and the upper column (4) are all made of transparent materials.

5. The detachable permeable concrete permeability coefficient testing device according to claim 1, characterized in that: The side wall of the base (2) is provided with a plurality of openings.

6. The detachable permeable concrete permeability coefficient testing device according to claim 1, characterized in that: A plurality of buckles (9) are fixedly connected to the surface of one of the middle columns (3), and a clamping block (8) adapted to the buckles (9) is provided on the surface of the other middle column (3).

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