Permeability coefficient testing device capable of realizing full-automatic control

Abstract

The utility model discloses a permeability coefficient testing device capable of realizing full-automatic control, and mainly relates to the field of permeability coefficient testing. Comprising a box body, an overflow water tank is arranged in the box body, a permeable cylinder is arranged in the overflow water tank, a test piece is placed in the permeable cylinder, a first overflow pipe is arranged on one side of the permeable cylinder, a second overflow pipe is arranged on one side of the overflow water tank, the top of the permeable cylinder is further communicated with a vacuum pump, and weighing mechanisms are arranged at the bottoms of the two measuring cylinders. A reservoir is arranged on one side in the box body, the reservoir is communicated with the top of the permeable cylinder through a water inlet pipe, and a control panel is arranged on the outer side of the box body. The device disclosed by the utility model has the beneficial effects that the full-automatic control of the test process can be realized, multi-person cooperation for measurement is not needed, the test operation process is convenient and fast, manual measurement and reading are not needed, errors in operation and reading are avoided, and the precision and the efficiency of the test of the permeability coefficient of the permeable material are further improved.

Description

Technical Field

[0001] The utility model relates to the field of water permeability coefficient testing, in particular to a water permeability coefficient testing device capable of realizing full-automatic control. Background Art

[0002] To meet current urban drainage requirements, China has proposed the concept of "sponge city" construction, advocating the use of permeable and breathable materials in urban construction. This is crucial for improving cities' ability to cope with natural disasters caused by rainwater, mitigating the urban heat island effect, and improving urban water circulation. Whether permeable surface paving materials have sufficient permeability is a key factor influencing the effectiveness of "sponge city" construction. The permeability coefficient is one of the most intuitive indicators for evaluating the permeability of permeable materials.

[0003] At present, the permeability coefficient test devices mentioned in the "Technical Code for Permeable Cement Concrete Pavement" CJJ / T 135-2009 (2023 Edition) and the "Permeable Pavement Bricks and Permeable Road Slabs" GB / T 25993-2023 are relatively simple, with many test steps. The test process requires collaborative measurement by multiple people, making the entire test operation complicated and the test progress slow, resulting in low test efficiency. In addition, manual measurement is bound to have errors in operation and reading, which makes the test results insufficiently accurate and unable to quickly and accurately obtain the permeability coefficient of the material. Utility Model Content

[0004] The purpose of the utility model is to provide a water permeability coefficient testing device that can realize fully automatic control. It can realize fully automatic control of the test process, does not require the cooperation of multiple people to perform measurements, makes the test operation process convenient and fast, and does not require manual measurement readings, avoids errors in operation and readings, and further improves the accuracy and efficiency of the water permeability coefficient test of permeable materials.

[0005] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical solutions:

[0006] A water permeability coefficient testing device capable of achieving fully automatic control comprises a box body, an overflow water tank being provided in the box body, a water permeable cylinder being provided in the overflow water tank, a test piece being placed in the water permeable cylinder, a first overflow pipe being provided on one side of the water permeable cylinder, a second overflow pipe being provided on one side of the overflow water tank, measuring cylinders being provided at the bottoms of the water outlets of the first overflow pipe and the second overflow pipe, a vacuum pump being connected to the top of the water permeable cylinder, a weighing mechanism being provided at the bottoms of the two measuring cylinders, a water reservoir being provided on one side of the box body, the water reservoir being connected to a water inlet pipe via a water inlet pump, the water outlet end of the water inlet pipe being connected to the top of the water permeable cylinder, a control panel being provided on the outside of the box body, and the vacuum pump, the water inlet pump and the weighing mechanism being electrically connected to the control panel respectively.

[0007] Furthermore, the overflow water tank is connected to a return pipe via a return pump, the water outlet end of the return pipe is connected to the water reservoir, and the return pump is electrically connected to the control panel.

[0008] Furthermore, a mounting groove is provided near the bottom of the water-permeable cylinder through a bracket.

[0009] Furthermore, there is a height difference between the first overflow pipe and the second overflow pipe.

[0010] Furthermore, the weighing mechanism includes a weighing platform, on which a weight sensor electrically connected to the control panel is provided.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] This patent automatically controls various electrical components through a control panel, and can automatically perform vacuum treatment of the test piece, test water supply, test data collection, and water permeability coefficient calculation and output, thereby realizing automatic control of the entire process of water permeability coefficient testing, and eliminating the need for multiple people to collaborate in measurement. In addition, this patent realizes a closed design through the box as a whole, which can realize vacuum treatment of the test piece and eliminates the need for other devices to process the test piece. The operating steps can be simplified, making the test operation process convenient and fast, and improving test efficiency. In addition, this patent collects and calculates data transmitted by the weighing mechanism through the control chip in the control panel, avoiding operation and reading errors caused by manual measurement, and can effectively improve the calculation accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attachment Figure 1 It is a structural diagram of the present utility model.

[0014] Reference numerals shown in the accompanying drawings:

[0015] 1. Box; 2. Overflow tank; 3. Permeable cylinder; 4. First overflow pipe; 5. Second overflow pipe; 6. Graduated cylinder; 7. Vacuum pump; 8. Water reservoir; 9. Inlet pump; 10. Inlet pipe; 11. Control panel; 12. Return pump; 13. Return pipe; 14. Mounting slot; 15. Weighing platform; 16. Weight sensor; 17. Height difference. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the contents of this invention, those skilled in the art may make various changes or modifications to the present invention, and that these equivalent forms also fall within the scope defined in this application.

[0017] The utility model is a water permeability coefficient testing device that can realize full-automatic control. The main structure includes a box body 1. The box body 1 enables the patent to realize a closed design, which can realize vacuum treatment of the test piece. There is no need to use other devices to process the test piece, which can simplify the operation steps. An overflow water tank 2 is provided in the box body 1, and a permeable cylinder 3 is provided in the overflow water tank 2. The test piece is placed in the permeable cylinder 3. A first overflow pipe 4 is provided on one side of the permeable cylinder 3, and a second overflow pipe 5 is provided on one side of the overflow water tank 2. There is a height difference 17 between the first overflow pipe 4 and the second overflow pipe 5. The first overflow pipe 4 is provided with a first overflow pipe 4. The second overflow pipe 5 is provided with a second overflow pipe 5. , the bottom of the water outlet of the second overflow pipe 5 is provided with a measuring cylinder 6, and the top of the permeable cylinder 3 is also connected to a vacuum pump 7. The above structures are all test device components recorded in the prior art, which have been clearly recorded in the "Technical Specifications for Permeable Cement Concrete Pavement" CJJ / T135-2009 (2023 Edition). Its specific structure and principle are not repeated here. The vacuum pump 7 can be automatically controlled by the control panel 11 to evacuate the inside of the permeable cylinder 3. The box 1, overflow tank 2, permeable cylinder 3, first overflow pipe 4, second overflow pipe 5 and measuring cylinder 6 are all made of white transparent acrylic material. The two The bottom of the measuring cylinder 6 is provided with a weighing mechanism, which includes a weighing platform 15. The weighing platform 15 is provided with a weight sensor 16, which can weigh the water in the measuring cylinder 6 in real time and transmit the mass data to the control panel 11 for subsequent automatic calculation and analysis. A water reservoir 8 is provided on one side of the box body 1. The water reservoir 8 is connected to the water inlet pipe 10 through the water inlet pump 9. The water outlet end of the water inlet pipe 10 is connected to the top of the permeable cylinder 3 and can automatically inject water into the permeable cylinder 3 under the control of the control panel 11. A control panel 11 is provided on the outside of the box body 1, and a control core is provided in the control panel 11. The control panel 11 is provided with a display screen and a human-computer interaction panel. The vacuum pump 7, the water inlet pump 9, and the weight sensor 16 are electrically connected to the control panel 11 respectively. The control instructions are issued through the control chip in the control panel 11, and the test data of the weight sensor 16 are received and analyzed and calculated. With the cooperation of the control panel 11 and the weight sensor 16, the present patent can realize the automatic control of the whole process of the water permeability coefficient test, without the need for multiple people to collaborate in measurement, simplifying the operation steps, improving the test efficiency, avoiding the operation and reading errors caused by manual measurement, and effectively improving the calculation accuracy of the test data.

[0018] Preferably, the overflow water tank 2 is connected to a return water pipe 13 through a return water pump 12, the water outlet end of the return water pipe 13 is connected to the water reservoir 8, and the return water pump 12 is electrically connected to the control panel 11. After the test is completed, the test water in the overflow water tank 2 can be recovered to the water reservoir 8, thereby realizing the recycling of the test water and saving water resources.

[0019] Preferably, a mounting groove 14 is provided near the bottom of the water-permeable cylinder 3 through a bracket. The mounting groove 14 is designed to be openable and closable and is provided with a sealing gasket to facilitate the placement and support of the test piece.

[0020] The steps for using the device to perform a water permeability test include:

[0021] (1) Use paraffin wax to seal the cylindrical or cubic permeable material specimen on all sides until it is watertight, ensuring that water only passes through the upper and lower surfaces of the specimen;

[0022] (2) After the paraffin on the outer surface of the specimen is solidified, the specimen is placed in the mounting slot 14, the test device is turned on through the control panel 11, and the type and size of the specimen (cylindrical, diameter and height; cube, length, width, height) are input into the control panel 11 according to the actual situation;

[0023] (3) Start the vacuum pump 7, evacuate the test module to a vacuum state and maintain it for 30 minutes, start the water inlet pump 9, and fill water into the permeable cylinder 3 until the water level is 100 mm higher than the upper surface of the test piece, turn off the vacuum pump 7 and the water inlet pump 9, and let it stand for 20 minutes;

[0024] (4) The water inlet pump 9 is started again to continue to fill the water-permeable cylinder 3 until water overflows from both the first overflow pipe 4 and the second overflow pipe 5. The weight sensor 16 detects the weight change of the measuring cylinder 6 and transmits the data to the control panel 11. The control chip in the control panel 11 calculates the increased mass Δ1 and Δ2 of the water in the two measuring cylinders 6 per unit time, respectively. This can be achieved by programming a calculation program in the control chip in advance. This is a conventional implementation method in the prior art, and its specific program content and programming principle are not described in detail here.

[0025] (5) When the control panel 11 detects that Δ1 and Δ2 are stable, it indicates that the water flow in the device has reached a stable state. The time is set for 5 minutes and the mass Δm of the water added in the measuring cylinder 6 is detected and recorded. The control chip in the control panel 11 calculates the water permeability coefficient of the test piece according to the pre-programmed water permeability coefficient calculation formula and displays it on the display screen of the control panel 11. The test of the test piece is completed. The water permeability coefficient calculation formula is:

[0026]

[0027] Where k is the water permeability coefficient of the specimen in mm / s; Δm is the amount of water added to the cylinder in time t, g; h is the thickness of the specimen in mm; ρ is the density of water in g / cm 3 A is the surface area of the specimen (mm) 2 ; H is the water level difference in the overflow pipe in mm; t is the time in s;

[0028] (6) Turn on the return water pump 12 to recycle the water in the overflow tank 2 into the water reservoir 8, and close the test device.

[0029] This patent can realize the automatic control of the whole process of water permeability coefficient test, without the need for multiple people to collaborate for measurement, which can simplify the operation steps, make the test operation process convenient and fast, and improve the test efficiency; in addition, this patent collects and calculates the data transmitted by the weighing mechanism through the control chip in the control panel 11, avoiding the operation and reading errors caused by manual measurement, and can effectively improve the calculation accuracy of the test data.

Claims

1. A water permeability coefficient testing device capable of achieving fully automatic control, comprising a box (1), an overflow water tank (2) provided in the box (1), a water permeable cylinder (3) provided in the overflow water tank (2), a test piece placed in the water permeable cylinder (3), a first overflow pipe (4) provided on one side of the water permeable cylinder (3), a second overflow pipe (5) provided on one side of the overflow water tank (2), a measuring cylinder (6) provided at the bottom of the water outlet of each of the first overflow pipe (4) and the second overflow pipe (5), and a vacuum pump (7) connected to the top of the water permeable cylinder (3), characterized in that: The bottoms of the two measuring cylinders (6) are both provided with a weighing mechanism. A water reservoir (8) is provided on one side of the box body (1). The water reservoir (8) is connected to a water inlet pipe (10) via a water inlet pump (9). The water outlet end of the water inlet pipe (10) is communicated with the top of the water-permeable cylinder (3). A control panel (11) is provided on the outside of the box body (1). The vacuum pump (7), the water inlet pump (9) and the weighing mechanism are electrically connected to the control panel (11) respectively.

2. A fully automatic water permeability test device according to claim 1, characterized in that: The overflow water tank (2) is connected to a return water pipe (13) via a return water pump (12), the water outlet end of the return water pipe (13) is in communication with a water reservoir (8), and the return water pump (12) is electrically connected to a control panel (11).

3. The fully automatic water permeability test device according to claim 1, characterized in that: A mounting groove (14) is provided in the water-permeable cylinder (3) near the bottom thereof via a bracket.

4. The fully automatic water permeability test device according to claim 1, characterized in that: There is a height difference (17) between the first overflow pipe (4) and the second overflow pipe (5).

5. The fully automatic water permeability test device according to claim 1, characterized in that: The weighing mechanism comprises a weighing platform (15), and a weight sensor (16) electrically connected to the control panel (11) is provided on the weighing platform (15).

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