Water permeability coefficient measuring device

Abstract

The utility model belongs to the road surface detection technical field discloses a kind of water permeation coefficient measuring devices, including support base, water permeation measurement piece, flow guide pipe and valve, water permeation measurement piece includes first measuring cylinder part and two second measuring cylinder parts, the diameter of first measuring cylinder part is greater than the diameter of second measuring cylinder part, compared with the same height measuring container in traditional measuring device, increase water volume, so under the same road surface condition, the error generated by artificial reading second reduces the influence proportion of water permeation coefficient, and the measurement precision of water permeation coefficient is improved.The diameter of second measuring cylinder part is less than the diameter of first measuring cylinder part, so that the water level change in the inside of both can be observed more timely by detection personnel, and the timing accuracy of detection personnel is improved.Valve is provided on flow guide pipe, which facilitates detection personnel to control the on-off of water at flow guide pipe in time, support base is arranged at the lower part of flow guide pipe, and support base can provide stable support for water permeation coefficient measurement operation.

Description

Technical Field

[0001] This utility model relates to the field of road surface testing technology, and in particular to a permeability coefficient measuring device. Background Technology

[0002] The permeability coefficient of a road surface is a key indicator reflecting the quality and compactness of the road surface. Based on the permeability test method recorded in the "Specifications for Field Testing of Highway Subgrade and Pavement", the timing starts when the water volume in the measuring device drops by 100ml and stops when the water volume drops by a total of 500ml. The permeability coefficient of the road surface is the ratio of the water volume drop to the time required for the water volume to drop. If the permeation time is too long, the permeation volume of the road surface at three minutes is used as the benchmark for calculation.

[0003] In traditional permeability coefficient measurement, both water volume reading and timing rely on manual operation, resulting in significant measurement errors. Taking permeable asphalt pavements with permeability coefficients of 5000 ml / min and 4500 ml / min as examples, the time required for 400 ml of water to permeate differs by only 0.5 seconds. Due to factors such as human reaction speed and visual reading delay, manual counting errors have a significant impact on the permeability coefficient measurement results.

[0004] Therefore, a new permeability coefficient measuring device is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a permeability coefficient measuring device that can reduce the influence of manual counting on the permeability coefficient measurement results and improve the measurement accuracy of the permeability coefficient.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model proposes a device for measuring the permeability coefficient, comprising:

[0008] The support base has drainage holes running through it along its height.

[0009] The seepage measurement device is set above the support base and includes a first measuring cylinder part and two second measuring cylinder parts, both of which are filled with water. The two second measuring cylinder parts are respectively set at both ends of the length direction of the first measuring cylinder part, and both second measuring cylinder parts are connected to the first measuring cylinder part. The diameter of the first measuring cylinder part is larger than the diameter of the second measuring cylinder part.

[0010] The guide tube has one end connected to the seepage hole and the other end connected to the second measuring cylinder near the support base.

[0011] A valve is installed in a flow guide pipe to control the flow of water within the pipe.

[0012] Specifically, the ratio of the diameter of the second measuring cylinder section to the diameter of the first measuring cylinder section is between 2:5 and 2:3.

[0013] Optionally, the permeability coefficient measuring device further includes a limiting member and a support column. The limiting member is connected to the support base through the support column. The limiting member abuts against the first measuring cylinder part, and the limiting member has a limiting hole. The second measuring cylinder part near one end of the support base is inserted into the limiting hole.

[0014] Specifically, the permeability coefficient measuring device also includes a first sealing element, which is sandwiched between the limiting element and the first measuring cylinder.

[0015] Optionally, the permeability coefficient measuring device also includes an automatic timing module, which includes a controller, a timer, and a liquid level sensor. Both second measuring cylinders are equipped with liquid level sensors. The timer and the liquid level sensors are electrically connected to the controller, which is configured to acquire the water level data from the liquid level sensors and the timing data from the timer.

[0016] For example, the orifice area of ​​the seepage hole gradually increases along the direction in which water flows from the guide pipe into the seepage hole.

[0017] Optionally, a counterweight is provided on the upper part of the support base, and the counterweight and the support base are detachably connected.

[0018] Optionally, a second seal is provided at the lower part of the support base.

[0019] For example, the material of the support base includes a zinc-iron alloy.

[0020] Optionally, the permeability coefficient measuring device further includes a water injection funnel, which is located at the upper opening of the second measuring cylinder section away from the support base, and the water injection funnel is connected to the second measuring cylinder section.

[0021] The beneficial effects of this utility model are:

[0022] This invention proposes a permeability coefficient measuring device. The permeability measuring component includes a first measuring cylinder and two second measuring cylinders. The diameter of the first measuring cylinder is larger than that of the second measuring cylinders. Compared to the measuring containers of the same height in traditional measuring devices, this increases the water volume. Therefore, under the same road surface conditions, the time required for the water volume to drop from the second measuring cylinder section furthest from the support base to the section closest to the support base is extended. This reduces the influence of errors caused by manual timing on the permeability coefficient measurement and improves the accuracy of the measurement. The smaller diameter of the second measuring cylinders compared to the first also allows the inspector to observe the water level changes within both sections more promptly, improving the accuracy of the timekeeping. One end of the guide pipe is connected to the second measuring cylinder section closest to the support base and is equipped with a valve, facilitating timely control of the water flow at the guide pipe. The other end of the guide pipe is connected to the support base, which provides stable support for the permeability coefficient measurement operation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the permeability coefficient measuring device described in an embodiment of this utility model.

[0024] In the picture:

[0025] 1. Support base; 11. Drainage hole; 12. Second seal;

[0026] 2. Water seepage measuring device; 21. First measuring cylinder section; 22. Second measuring cylinder section; 23. First scale mark; 24. Second scale mark;

[0027] 3. Drainage pipe;

[0028] 4. Valves;

[0029] 5. Limiting components;

[0030] 6. Support columns. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] Based on the water permeability test method described in the "Specifications for Field Testing of Highway Subgrade and Pavement," the water permeability coefficient of a pavement refers to the ratio of 400ml of water to the time required for 400ml of water to permeate the pavement. Traditional water permeability coefficient measuring devices rely on manual operation for both water volume reading and timing. The water permeability coefficient of ordinary asphalt is mostly within 200ml / min, and the time required to test the asphalt water permeability coefficient is approximately 2 minutes. Manual counting has a relatively small measurement error for the water permeability coefficient of asphalt pavement. However, to improve noise reduction, most existing pavements are paved with permeable asphalt, but the permeability coefficient of permeable asphalt is usually not less than 4000ml / min. Taking permeable asphalt pavements with permeability coefficients of 5000ml / min and 4500ml / min as examples, the time required for 400ml of water to permeate differs by only 0.5 seconds. Due to factors such as human reaction speed and visual reading delay, the manual counting error has a significant impact on the water permeability coefficient measurement results.

[0036] To reduce human error, such as Figure 1As shown, this embodiment provides a permeability coefficient measuring device, including a support base 1, a permeability measuring element 2, a guide pipe 3, and a valve 4. The support base 1 has a permeability hole 11 extending through it along its height. The permeability measuring element 2 is located above the support base 1 and includes a first measuring cylinder 21 filled with water and two second measuring cylinders 22. The two second measuring cylinders 22 are respectively located at both ends of the length of the first measuring cylinder 21, and both second measuring cylinders 22 are connected to the first measuring cylinder 21. The diameter of the first measuring cylinder 21 is larger than the diameter of the second measuring cylinders 22. One end of the guide pipe 3 is connected to the permeability hole 11, and the other end is connected to the second measuring cylinder 22 near one end of the support base 1. The valve 4 is located on the guide pipe 3 and is used to control the flow of water within the guide pipe 3. For ease of subsequent description, the second measuring cylinder section 22 closer to the support base 1 is called the proximal second measuring cylinder section 22, and the second measuring cylinder section 22 farther from the support base 1 is called the distal second measuring cylinder section 22, which will not be described again. It should be noted that the overall height of the seepage measurement component 2 proposed in this embodiment is consistent with the height of the straight measuring cylinder in a conventional measuring device, and the diameter of the second measuring cylinder section 22 is the same as the diameter of the straight measuring cylinder. A first scale mark 23 is provided on the proximal second measuring cylinder section 22. The position of the first scale mark 23 corresponds to the position of the 100ml scale mark on the measuring cylinder in a conventional measuring device, and the first scale mark 23 is marked with its corresponding scale value in this embodiment. A second scale mark 24 is provided on the distal second measuring cylinder section 22. The position of the second scale mark 24 corresponds to the position of the 500ml scale mark on the measuring cylinder in a conventional measuring device, and the second scale mark 24 is marked with its corresponding scale value in this embodiment.

[0037] In this embodiment, the seepage measurement device 2 includes a first measuring cylinder 21 and two second measuring cylinders 22. The diameter of the first measuring cylinder 21 is larger than the diameter of the second measuring cylinders 22. Compared with the measuring container of the same height in a conventional measuring device, this increases the water volume. Therefore, under the same road surface conditions, the counting time required for the water volume in the seepage measurement device 2 to drop from the second scale mark 24 to the first scale mark 23 is longer. Since the difference between the first scale mark 23 and the second scale mark 24 is known, the measurement accuracy of the seepage coefficient depends on the accuracy of manual counting. The increased water volume of the seepage measurement device 2 lengthens the counting time, thereby reducing the impact of errors caused by manual counting on the seepage coefficient, and improving the measurement accuracy of the seepage coefficient. At the same time, the smaller diameters of the near-end second measuring cylinder 22 and the far-end second measuring cylinder 22 compared to the diameter of the first measuring cylinder 21 also allow the inspector to observe the water level changes inside them more promptly, improving the timing accuracy of the inspector. One end of the guide pipe 3 is connected to the near-end second measuring cylinder section 22 and is equipped with a valve 4 to facilitate timely control of the water flow at the guide pipe 3 by the testing personnel. The other end of the guide pipe 3 is connected to the seepage hole 11, so that the water filled in the seepage measurement component 2 can enter the road surface to be tested sequentially through the guide pipe 3 and the seepage hole 11, ensuring the smooth progress of subsequent seepage coefficient measurement operations. The support base 1 is located below the seepage measurement component 2 and the guide pipe 3, providing stable support for the seepage coefficient measurement operation.

[0038] Specifically, the ratio of the diameter of the second measuring cylinder 22 to the diameter of the first measuring cylinder 21 is between 2:5 and 2:3, so that the water volume of the first measuring cylinder 21 is 2.25 to 6.25 times the water volume of a single second measuring cylinder 22. This limits the excessively long counting time caused by the large diameter of the first measuring cylinder 21, and also avoids the difficulty in observing the water volume caused by the small diameter of the second measuring cylinder 22 compared to the first measuring cylinder 21. The permeability coefficient measuring device proposed in this embodiment has both the efficiency and accuracy of measuring the permeability coefficient.

[0039] For example, in this embodiment, the ratio of the diameter of the second measuring cylinder 22 to the diameter of the first measuring cylinder 21 is 1:2. The diameter of the second measuring cylinder 22 is the same as the diameter of the straight measuring cylinder in a conventional measuring device, which is 50mm. The diameter of the first measuring cylinder 21 is 100mm. The scale value at the first scale mark 23 is 100ml, and the scale value at the second scale mark 24 is 1700ml. Taking permeable asphalt pavement with permeability coefficients of 5000ml / min and 4500ml / min as examples, the time difference required for water to drop from the second scale mark 24 to the first scale mark 23 is extended from the original 0.5s to 2.1s. This reduces the timing requirements for the testing personnel, reduces the impact of manual counting errors on the permeability coefficient measurement results, and improves the measurement accuracy of the permeability coefficient.

[0040] Specifically, the permeability coefficient measuring device also includes a water injection funnel, which is located at the upper opening of the second measuring cylinder 22 away from the support base 1, and the water injection funnel is connected to the far end of the second measuring cylinder 22. The water injection funnel can improve the water injection operation of the testing personnel into the permeability measuring element 2 and reduce the waste of water resources during the water injection process.

[0041] Optionally, the permeability coefficient measuring device also includes an automatic timing module, which includes a controller, a timer, and a liquid level sensor. Both second measuring cylinder sections 22 are equipped with liquid level sensors. The timer and liquid level sensors are electrically connected to the controller, which is configured to acquire water level data from the liquid level sensors and timing data from the timer. The liquid level sensors in both second measuring cylinder sections 22 can promptly detect changes in the overall water level within the permeability measuring element 2 and acquire water level data in real time. The automatic timing module enhances the automation of the permeability coefficient measuring device, fundamentally eliminating measurement errors caused by manual counting and improving the accuracy of the permeability coefficient measurement results. The controller can also be electrically connected to a display screen for easy and intuitive acquisition of measurement results by testing personnel. Preferably, the controller is electrically connected to the valve 4 for opening and closing the valve 4, which improves operational accuracy compared to manual operation of the valve 4 and enhances the control precision of the permeable water volume from the guide pipe 3. It is understood that the specific structure and working principle of the liquid level sensor are existing technologies and will not be described in detail here.

[0042] In this embodiment, the permeability coefficient measuring device further includes a limiting member 5 and a support column 6. The limiting member 5 is connected to the support base 1 via the support column 6. The limiting member 5 abuts against the first measuring cylinder portion 21, and the limiting member 5 has a limiting hole. The second measuring cylinder portion 22 near one end of the support base 1 is inserted into the limiting hole. The limiting member 5 abuts against the first measuring cylinder portion 21, and the limiting hole allows it to be inserted into the near-end second measuring cylinder portion 22. The limiting member 5 is connected to the support base 1 via the support column 6. The setting of the limiting member 5 and the support column 6 improves the structural stability of the permeability measuring component 2 during the measurement process, ensuring the reliability and accuracy of the permeability coefficient measurement. The assembly process of the permeability measuring component 2 and the limiting member 5 is simple and easy to implement, reducing the operational difficulty for testing personnel.

[0043] Furthermore, the permeability coefficient measuring device also includes a first sealing element, which is sandwiched between the limiting element 5 and the first measuring cylinder 21. The first sealing element enhances the connection between the limiting element 5 and the first measuring cylinder 21, and further improves the positioning accuracy of the permeability measuring element 2 during the permeability coefficient measurement process.

[0044] Optionally, along the direction in which water flows from the guide pipe 3 into the seepage hole 11, the orifice area of ​​the seepage hole 11 gradually increases, that is, the seepage hole 11 is conical, so as to have a better guiding effect on the water flowing from the guide pipe 3 to the seepage hole 11, improve the flow efficiency of water through the seepage hole 11 into the road surface to be tested, and thus improve the overall detection efficiency of the permeability coefficient measuring device.

[0045] In this embodiment, a second sealing element 12 is provided at the lower part of the support base 1. The second sealing element 12 is sandwiched between the support base 1 and the road surface to be tested, which enhances the connection stability and sealing performance between the support base 1 and the road surface to be tested, and ensures the measurement accuracy of the permeability coefficient. Furthermore, a counterweight is provided at the upper part of the support base 1. The counterweight is detachably connected to the support base 1. The counterweight can apply pressure to the support base 1, improve the fit between the support base 1 and the road surface to be tested, and enhance the placement stability of the permeability coefficient measuring device relative to the road surface to be tested.

[0046] For example, the support base 1 is made of zinc-iron alloy to enhance its structural strength and environmental adaptability, ensuring stable load-bearing capacity for its upper components. The limiting member 5 and the support column 6 can also be made of zinc-iron alloy.

[0047] Specifically, the process of using the permeability coefficient measuring device is as follows: Water is injected into the permeability measuring element 2 using a water injection funnel until the water volume exceeds the second scale mark 24. Then, the valve 4 is opened so that the water in the permeability measuring element 2 can seep into the road surface to be tested through the guide pipe 3 and the seepage hole 11 in sequence. Timing starts when the water volume drops to the second scale mark 24 and stops when the water volume continues to drop to the first scale mark 23. The ratio of the difference between the scale values ​​of the second scale mark 24 and the first scale mark 23 to the timing time is the permeability coefficient of the road surface to be tested.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A permeability coefficient measuring device, characterized in that, include: A support base (1) is provided with a water seepage hole (11) through it along its height direction; A water seepage measuring device (2) is disposed above the support base (1), including a first measuring cylinder part (21) filled with water and two second measuring cylinder parts (22). The two second measuring cylinder parts (22) are respectively disposed at both ends of the length direction of the first measuring cylinder part (21), and the two second measuring cylinder parts (22) are connected to the first measuring cylinder part (21). The diameter of the first measuring cylinder part (21) is larger than the diameter of the second measuring cylinder part (22). The guide pipe (3) has one end connected to the seepage hole (11) and the other end connected to the second measuring cylinder part (22) near one end of the support base (1). A valve (4) is provided in the guide pipe (3) for controlling the flow of water within the guide pipe (3).

2. The permeability coefficient measuring device according to claim 1, characterized in that, The ratio of the diameter of the second measuring cylinder section (22) to the diameter of the first measuring cylinder section (21) is between 2:5 and 2:

3.

3. The permeability coefficient measuring device according to claim 1, characterized in that, The permeability coefficient measuring device further includes a limiting member (5) and a support column (6). The limiting member (5) is connected to the support base (1) through the support column (6). The limiting member (5) abuts against the first measuring cylinder part (21), and the limiting member (5) has a limiting hole. The second measuring cylinder part (22) near one end of the support base (1) is inserted into the limiting hole.

4. The permeability coefficient measuring device according to claim 3, characterized in that, The permeability coefficient measuring device further includes a first sealing element, which is sandwiched between the limiting element (5) and the first measuring cylinder part (21).

5. The permeability coefficient measuring device according to claim 1, characterized in that, The permeability coefficient measuring device further includes an automatic timing module, which includes a controller, a timer, and a liquid level sensor. The two second measuring cylinders (22) are each equipped with the liquid level sensor. The timer and the liquid level sensor are both electrically connected to the controller. The controller is configured to acquire the water level data of the liquid level sensor and the timing data of the timer.

6. The permeability coefficient measuring device according to any one of claims 1-5, characterized in that, Along the direction in which water flows from the guide pipe (3) into the seepage hole (11), the orifice area of ​​the seepage hole (11) gradually increases.

7. The permeability coefficient measuring device according to any one of claims 1-5, characterized in that, The upper part of the support base (1) is provided with a counterweight, and the counterweight and the support base (1) are detachably connected.

8. The permeability coefficient measuring device according to any one of claims 1-5, characterized in that, The lower part of the support base (1) is provided with a second sealing element (12).

9. The permeability coefficient measuring device according to any one of claims 1-5, characterized in that, The material of the support base (1) includes zinc-iron alloy.

10. The permeability coefficient measuring device according to any one of claims 1-5, characterized in that, The permeability coefficient measuring device further includes a water injection funnel, which is located at the upper opening of the second measuring cylinder (22) away from the support base (1), and the water injection funnel is connected to the second measuring cylinder (22).

Images