Permeable concrete permeability performance testing device

Abstract

The utility model discloses a pervious concrete permeability performance testing device which comprises a water storage tank, an upper fixing seat and a lower fixing seat which are sequentially connected from top to bottom, and the centers of the water storage tank, the upper fixing seat and the lower fixing seat are located on the same straight line; the upper fixing base and the lower fixing base are connected through a telescopic mechanism, and a containing groove used for containing the pervious concrete mold is formed between the upper fixing base and the lower fixing base; the side wall of the upper fixing seat is communicated with a first pressure measuring pipe, the side wall of the lower fixing seat is respectively communicated with a second pressure measuring pipe and a drainage port, and the drainage port is connected with a drainage valve. By arranging the telescopic mechanism, pervious concrete molds with different heights can conveniently enter the placing groove from the side face so as to carry out the water permeability performance test, and meanwhile, the water permeability performance parameters of pervious concrete can be rapidly measured through visual reading of the pressure measuring pipe.

Description

Technical Field

[0001] This utility model relates to the field of materials testing technology, and in particular to a device for testing the permeability performance of permeable concrete. Background Technology

[0002] Permeable concrete, also known as porous concrete, no-fines concrete, or permeable pavement, is a type of porous, lightweight concrete made from aggregates, cement, reinforcing agents, and water. This type of concrete boasts excellent permeability, air permeability, and light weight, leading to its widespread application in urban areas such as parking lots, sidewalks, and park paths in recent years. It effectively reduces urban waterlogging and prevents urban flooding. Furthermore, its excellent air and water permeability can effectively lower surface temperatures, mitigate the urban heat island effect, and contribute to urban ecological balance, thus achieving sustainable development. When using permeable concrete, its permeability coefficient needs to be tested. To ensure the accuracy of the test results, the permeability test must be conducted at a fixed location.

[0003] Existing technology, such as the patent document with application number CN201621178350.8, discloses a device for testing the permeability coefficient of permeable concrete, including a permeable cylinder, a first overflow pipe, a second overflow pipe, a third overflow pipe, a first stop valve, a second stop valve, a third stop valve, an ultrasonic level gauge, a first level sensor, a second level sensor, a water injection system, an overflow tank, an overflow port, a stopwatch timer, a measuring cylinder, a bracket, clamps, and a sealing ring. This utility model is equipped with a stopwatch timer and an ultrasonic level gauge for automatically reading level difference information and time information of level changes. The stopwatch timer is connected to the ultrasonic level gauge to synchronously record the level difference information and the time information of level changes. The sealing measures of the sealing ring and clamps ensure a tight connection between the specimen and the permeable cylinder, preventing water from flowing out from the gap between the specimen and the permeable cylinder. It features high automation, good data timeliness, and accurate test results.

[0004] However, the existing technical solutions mentioned above still have shortcomings. The overall structure requires a large number of precision sensors, and if the sensors malfunction, it can easily lead to data errors. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a permeability performance testing device for permeable concrete, which can conveniently and reliably test the permeability performance of permeable concrete.

[0006] According to a first aspect of the present invention, a permeable concrete permeability performance testing device includes a water storage tank, an upper fixed base, a permeable concrete mold, and a lower fixed base. The water storage tank, the upper fixed base, and the lower fixed base are connected sequentially from top to bottom, and their centers are all located on the same straight line.

[0007] The upper fixed seat and the lower fixed seat are connected by a telescopic mechanism, and a placement groove for placing the permeable concrete mold is provided between the upper fixed seat and the lower fixed seat.

[0008] The upper fixed base has a first pressure measuring tube connected to its side wall, and the lower fixed base has a second pressure measuring tube and a drain outlet connected to its side wall, with a drain valve connected to the drain outlet.

[0009] The permeable concrete permeability performance testing device according to the present utility model has at least the following beneficial effects: by setting a telescopic mechanism, permeable concrete molds of different heights can be conveniently entered into the placement groove from the side to conduct permeability performance testing, and at the same time, the permeability performance parameters of permeable concrete can be quickly measured by the intuitive reading of the pressure measuring tube.

[0010] According to some embodiments of this utility model, the telescopic mechanism includes a ball screw pair and a guide rod. The upper fixed seat has mounting holes and guide holes symmetrically and vertically formed about the central axis of the upper fixed seat. The lower fixed seat has two blind holes adapted to fit the mounting holes. The nut of the ball screw pair is fixedly connected to the mounting holes. One end of the ball screw pair is rotatably connected to one of the blind holes. A handwheel is connected to the other end of the ball screw pair. The guide rod passes through the guide holes in sequence and is fixedly connected to the blind holes.

[0011] According to some embodiments of this utility model, the upper fixing seat, the permeable concrete mold, and the lower fixing seat are all hollow structures.

[0012] According to some embodiments of the present invention, the inner cavity of the upper fixed seat is provided with a first mounting step and a fixing step, and the inner cavity of the lower fixed seat is provided with a second mounting step.

[0013] When the test begins, the water storage tank abuts against the first installation step, the top of the permeable concrete mold abuts against the fixed step, and the bottom of the permeable concrete mold abuts against the second installation step.

[0014] According to some embodiments of the present invention, the permeable concrete permeability performance testing device further includes a partition plate, which is connected to the connection between the lower fixed base and the permeable concrete mold.

[0015] According to some embodiments of this utility model, the partition is a mesh grille.

[0016] According to some embodiments of the present invention, the top opening of the first pressure measuring tube is flush with the top opening of the second pressure measuring tube.

[0017] According to some embodiments of the present invention, the lowest end of the first pressure measuring tube is flush with the step surface of the fixed step, and the lowest end of the second pressure measuring tube is flush with the lowest end of the drain outlet.

[0018] According to some embodiments of the present invention, the bottom of the water storage tank is provided with a plurality of drainage holes at even intervals.

[0019] According to some embodiments of this utility model, a water inlet is provided above the water storage tank, and the water inlet is connected to the water supply system via a switch.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a top view of the permeability performance testing device for permeable concrete according to an embodiment of the present invention.

[0023] Figure 2 This is a cross-sectional structural diagram of the permeability performance testing device for permeable concrete according to an embodiment of this utility model.

[0024] 10. Water storage tank; 20. Upper fixed seat; 21. First installation step; 22. Fixed step; 23. Opening; 30. Permeable concrete mold; 40. Lower fixed seat; 41. Second installation step; 51. Ball screw pair; 52. Guide rod; 53. Handwheel; 60. Drain outlet; 70. First pressure measuring tube; 80. Second pressure measuring tube; 90. Partition plate. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] refer to Figure 1 as well as Figure 2 As shown, the permeable concrete permeability performance testing device according to an embodiment of the present invention includes a water storage tank 10, an upper fixed seat 20, a permeable concrete mold 30, and a lower fixed seat 40. The water storage tank 10, the upper fixed seat 20, and the lower fixed seat 40 are connected sequentially from top to bottom, and their centers are all located on the same straight line.

[0030] The upper fixed seat 20 and the lower fixed seat 40 are connected by a telescopic mechanism, and a placement groove for placing the permeable concrete mold 30 is provided between the upper fixed seat 20 and the lower fixed seat 40.

[0031] The upper fixed base 20 has a first pressure measuring tube 70 connected to its side wall, and the lower fixed base 40 has a second pressure measuring tube 80 and a drain outlet 60 connected to its side wall. A drain valve is connected to the drain outlet 60.

[0032] In practical use, by setting up a telescopic mechanism, permeable concrete molds 30 of different heights can be easily entered into the placement groove from the side to conduct permeability performance tests. At the same time, the permeability performance parameters of permeable concrete can be quickly measured by the intuitive reading of the pressure measuring tube.

[0033] In some specific embodiments of this utility model, it may also have the following additional technical features: the telescopic mechanism includes a ball screw pair 51 and a guide rod 52. The upper fixed seat 20 is symmetrically and vertically provided with a mounting hole (not shown in the figure) and a guide hole (not shown in the figure) about the central axis of the upper fixed seat 20. The lower fixed seat 40 is provided with two blind holes (not shown in the figure) adapted to each other. The nut of the ball screw pair 51 is fixedly connected to the mounting hole. One end of the screw of the ball screw pair 51 is rotatably connected to one of the blind holes. The other end of the screw of the ball screw pair 51 is connected to a handwheel 53. The guide rod 52 passes through the guide hole in sequence and is fixedly connected to the blind hole.

[0034] In some specific embodiments of this utility model, it may also have the following additional technical features: the top side wall of the upper fixed seat 20 has an opening 23 for the water storage tank 10 to enter and exit. Through the above design, interference between the water storage tank 10 and the ball screw pair 51 can be avoided.

[0035] In some specific embodiments of this utility model, it may also have the following additional technical features: the upper fixing seat 20, the permeable concrete mold 30 and the lower fixing seat 40 are all hollow structures.

[0036] In some specific embodiments of this utility model, it may also have the following additional technical features: the inner cavity of the upper fixed seat 20 is respectively provided with a first mounting step 21 and a fixing step 22, and the inner cavity of the lower fixed seat 40 is provided with a second mounting step 41;

[0037] When the test begins, the water storage tank 10 abuts against the first installation step 21, the top of the permeable concrete mold 30 abuts against the fixed step 22, and the bottom of the permeable concrete mold 30 abuts against the second installation step 41.

[0038] This design enhances the fixation of the permeable concrete mold 30, reducing the impact of vibration or movement on the test.

[0039] In some specific embodiments of this utility model, it may also have the following additional technical features: the permeability performance testing device for permeable concrete further includes a partition 90, which is connected to the connection between the lower fixed base 40 and the permeable concrete mold 30.

[0040] In some specific embodiments of this utility model, it may also have the following additional technical features: the partition 90 is a mesh grille. This design ensures that water can flow freely downwards, avoiding the formation of pressure differences, while also improving the overall structural support strength.

[0041] In some specific embodiments of this utility model, it may also have the following additional technical features: the top opening of the first pressure measuring tube 70 is flush with the top opening of the second pressure measuring tube 80. Furthermore, each pressure measuring tube is engraved with graduations for easy data reading.

[0042] In some specific embodiments of this utility model, it may also have the following additional technical features: the lowest end of the first pressure measuring tube 70 is flush with the step surface of the fixed step 22, and the lowest end of the second pressure measuring tube 80 is flush with the lowest end of the drain outlet 60. This design can improve the accuracy of detection and reduce the possibility of pressure difference.

[0043] In some specific embodiments of this utility model, it may also have the following additional technical features: a plurality of water leakage holes are evenly spaced at the bottom of the water storage tank 10.

[0044] In some specific embodiments of this utility model, it may also have the following additional technical features: a water inlet is provided above the water storage tank 10, and the water inlet is connected to the water supply system through a switch.

[0045] Specifically, water is supplied to the water storage tank 10 in a timely manner through the water inlet, and the water outlet is shut off by turning off the switch when water supply is not needed.

[0046] Working principle: During the experiment, permeable concrete is filled into the permeable concrete mold 30. After curing, the cement slurry on the outside of the permeable concrete mold 30 is cleaned before testing.

[0047] Head loss test: Adjust the drain valve of drain outlet 60 to a suitable position for head loss testing; rotate the screw by handwheel 53 to raise the upper fixed seat 20, making it easier to place the permeable concrete mold 30 to be tested into the placement groove and onto the second installation step 41. Then rotate handwheel 53 in the opposite direction to lower the upper fixed seat 20 until the fixed step 22 abuts against the permeable concrete mold 30, thus completing the fixed installation of the permeable concrete mold 30; then, introduce a suitable flow of water into the water storage tank 10 to keep the water storage tank 10 constant and the inflow and outflow consistent, ensuring the device is at full flow. The head difference between the first pressure measuring tube 70 and the second pressure measuring tube 80 is the head loss.

[0048] Permeability Test: Adjust the drain valve of drain outlet 60 to a suitable position for permeability testing; rotate the screw using handwheel 53 to raise the upper fixed seat 20, facilitating the placement of the permeable concrete mold 30 to be tested into the placement groove and onto the second installation step 41. Then, rotate handwheel 53 in the opposite direction to lower the upper fixed seat 20 until the fixed step 22 abuts against the permeable concrete mold 30, thus completing the fixed installation of the permeable concrete mold 30; then, introduce a suitable flow of water into the water storage tank 10, keeping the water storage tank 10 constant and ensuring that the incoming flow rate is consistent with the outgoing flow rate. Read the water volume discharged from the drain valve and time it, divide by the result to obtain the flow rate, and then divide the flow rate by the specimen area to obtain the permeability rate.

[0049] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A device for testing the permeability performance of permeable concrete, characterized in that, It includes a water storage tank (10), an upper fixed base (20), a permeable concrete mold (30), and a lower fixed base (40). The water storage tank (10), the upper fixed base (20), and the lower fixed base (40) are connected sequentially from top to bottom, and their centers are all located on the same straight line. The upper fixed seat (20) and the lower fixed seat (40) are connected by a telescopic mechanism, and a placement groove for placing the permeable concrete mold (30) is provided between the upper fixed seat (20) and the lower fixed seat (40). The upper fixed seat (20) has a first pressure measuring tube (70) connected to its side wall, and the lower fixed seat (40) has a second pressure measuring tube (80) and a drain outlet (60) connected to its side wall, with a drain valve connected to the drain outlet (60).

2. The permeability performance testing device for permeable concrete according to claim 1, characterized in that, The telescopic mechanism includes a ball screw pair (51) and a guide rod (52). The upper fixed seat (20) is symmetrically and vertically provided with mounting holes and guide holes about the central axis of the upper fixed seat (20). The lower fixed seat (40) is provided with two blind holes. The nut of the ball screw pair (51) is fixedly connected to the mounting hole. One end of the screw of the ball screw pair (51) is rotatably connected to one of the blind holes. The other end of the screw of the ball screw pair (51) is connected to a handwheel (53). The guide rod (52) passes through the guide hole in sequence and is fixedly connected to the blind hole.

3. The permeability performance testing device for permeable concrete according to claim 1, characterized in that, The upper fixing seat (20), the permeable concrete mold (30), and the lower fixing seat (40) are all hollow structures.

4. The permeability performance testing device for permeable concrete according to claim 3, characterized in that, The upper fixed seat (20) has a first mounting step (21) and a fixed step (22) respectively provided on its inner cavity, and the lower fixed seat (40) has a second mounting step (41) provided on its inner cavity; When the test begins, the water storage tank (10) abuts against the first mounting step (21), the top of the permeable concrete mold (30) abuts against the fixed step (22), and the bottom of the permeable concrete mold (30) abuts against the second mounting step (41).

5. The permeability performance testing device for permeable concrete according to claim 4, characterized in that, The permeable concrete permeability performance testing device also includes a partition (90), which is connected to the connection between the lower fixed seat (40) and the permeable concrete mold (30).

6. The permeability performance testing device for permeable concrete according to claim 5, characterized in that, The partition (90) is a mesh grille.

7. The permeability performance testing device for permeable concrete according to claim 4, characterized in that, The top opening of the first pressure measuring tube (70) is flush with the top opening of the second pressure measuring tube (80).

8. The permeability performance testing device for permeable concrete according to claim 7, characterized in that, The lowest end of the first pressure measuring tube (70) is flush with the step surface of the fixed step (22), and the lowest end of the second pressure measuring tube (80) is flush with the lowest end of the drain outlet (60).

9. The permeability performance testing device for permeable concrete according to claim 1, characterized in that, The bottom of the water storage tank (10) is provided with multiple drainage holes at even intervals.

10. The permeability performance testing device for permeable concrete according to any one of claims 1-9, characterized in that, A water inlet is provided above the water storage tank (10), and the water inlet is connected to the water supply system through a switch.

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