A device for detecting the permeability of concrete

Abstract

The utility model relates to concrete technical field especially, and it is concrete permeable rate detection device, including detection box, still including pressing plate, spring, sealing ring, lip seal and fixing piece, the inside of detection box is provided with pressing plate, the bottom of pressing plate is provided with fixing piece, fixing piece sets up multiple groups, the bottom of fixing piece is provided with spring, spring sets up multiple groups, spring far from the one end of pressing plate is provided with sealing ring, sealing ring is circular, the inner wall of sealing ring is provided with lip seal, the utility model discloses compared with traditional concrete permeable rate detection device, adds adaptive sealing mechanism, utilizes sealing mechanism to stick concrete surface, has promoted the sealing performance of pressing plate, has reduced because concrete surface exists local undulation, and has produced because of the insufficient sealing that leads to not through concrete pore penetration into the situation of collecting liquid box, has promoted the accuracy of permeable rate value, through increasing filter screen, reduces the impurity in water, prevents the situation that the impurity is blocked water jet head through water circulation.

Description

Technical Field

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

[0002] Concrete is widely used as a building material in structural engineering projects such as high-rise buildings, bridges, and dams. Concrete permeability refers to the amount of water that can pass through a unit area of ​​concrete per unit time. The permeability of concrete can be used to evaluate its permeability performance. Concrete with good permeability can be selected to build municipal roads, alleviate urban flooding, replenish groundwater resources, and improve the ecological environment.

[0003] The permeability of concrete is tested using a permeability testing device. The concrete to be tested is placed on the operating table, and the concrete is squeezed by a pressure plate and sprayed with water through a nozzle. Existing testing devices usually use rigid pressing or static sealing gaskets to seal the concrete when the pressure plate squeezes the specimen. However, the concrete surface is uneven. When there are local undulations on the surface of the specimen, the water will preferentially seep directly into the collection box from the low resistance path instead of through the pores of the concrete due to insufficient sealing at the edges of the contact surface. This results in a higher permeability value and affects the assessment of the permeability of the concrete.

[0004] Therefore, in view of the limited sealing performance of existing concrete permeability testing devices, which leads to higher permeability values, a new concrete permeability testing device can be designed. By adding an adaptive sealing mechanism, the pressure plate squeezes the concrete while the sealing mechanism adheres to the concrete surface, improving the sealing performance, reducing the deviation of the permeability value, and enhancing the practical value of the testing device. Utility Model Content

[0005] To overcome the problem that most concrete permeability testing devices have limited sealing performance and cannot adapt to the undulations of the concrete surface, thus affecting the permeability assessment.

[0006] The technical solution of this utility model is as follows: a concrete permeability testing device, including a testing box; it also includes a pressure plate, a spring, a sealing ring, a lip seal ring and a fixing component. The testing box is equipped with a pressure plate, and a fixing component is provided at the bottom of the pressure plate. Multiple sets of fixing components are provided. A spring is provided at the bottom of the fixing component. Multiple sets of springs are provided. A sealing ring is provided at the end of the spring away from the pressure plate. The sealing ring is circular, and a lip seal ring is provided on the inner wall of the sealing ring.

[0007] Preferably, when the pressure plate is pushed downward, the spring is fixed by a fixing component, and the concrete specimen is squeezed by the sealing ring and lip seal. The height is automatically adjusted according to the specimen contour by the spring elasticity to ensure sealing performance. Thus, while the pressure plate squeezes the concrete, the sealing mechanism adheres to the concrete surface, improving the sealing performance, reducing the deviation of the permeability value, and enhancing the practical value of the testing device.

[0008] Preferably, the testing box is equipped with a hydraulic cylinder, and there are two sets of hydraulic cylinders. One end of the hydraulic cylinder is equipped with a pressure plate.

[0009] Preferably, a spray head is provided at the bottom of the pressure plate, and a corrugated pipe is fixedly connected to the top of the spray head. The corrugated pipe passes through the test box and is fixedly connected to the first water supply pipe. A water pump is provided at the other end of the first water supply pipe and is located at the top of the test box.

[0010] Preferably, a second water supply pipe is provided on one side of the water pump, a filter box is provided at the other end of the second water supply pipe, a third water supply pipe is provided on the outside of the filter box, and a detection box is provided at the other end of the third water supply pipe.

[0011] Preferably, the bottom of the inner side of the test box is provided with a base plate, a filter screen is provided in the middle of the base plate, an operating platform is provided on the top of the base plate, the operating platform is hollow inside, a water filter plate is provided on the top of the operating platform, and a U-shaped groove is opened in the upper part of the base plate, with slopes on both sides of the U-shaped groove.

[0012] Preferably, a liquid collection box is provided at the bottom of the base plate, the top of the liquid collection box has an opening with the same shape as the opening of the base plate, and a water level monitor is provided on the side wall of the liquid collection box, and the water level monitor is connected to the liquid collection box for signal transmission.

[0013] The beneficial effects of this utility model are: Compared to traditional concrete permeability testing devices, the addition of an adaptive sealing mechanism, which adheres to the concrete surface, significantly improves the sealing performance of the pressure plate. This effectively reduces the possibility of insufficient sealing due to local undulations on the concrete surface, preventing liquid from seeping into the collection box through the concrete pores. This improves the accuracy of the permeability reading. Furthermore, the addition of a filter screen reduces impurities in the water, effectively preventing impurities from clogging the spray nozzles through water circulation, thus enhancing the practical value of the testing device. Attached Figure Description

[0014] Figure 1 The diagram shown is a three-dimensional structural schematic of the concrete permeability testing device of this utility model. Figure 2 The diagram shown is a three-dimensional structural diagram of the pressure plate of the concrete permeability testing device of this utility model. Figure 3The diagram shown is a three-dimensional structural schematic of the sealing mechanism of the concrete permeability testing device of this utility model. Figure 4 The diagram shown is a three-dimensional structural schematic of the operating platform of the concrete permeability testing device of this utility model.

[0015] Explanation of reference numerals in the attached drawings: 1. Detection box; 101. Hydraulic cylinder; 102. Bellows; 103. Pressure plate; 104. Spray head; 105. Spring; 106. Sealing ring; 107. Lip seal; 108. Fixing component; 2. Liquid collection box; 201. Operating table; 202. Filter plate; 203. U-shaped groove; 204. Base plate; 205. Filter screen; 3. Filter box; 4. Water pump; 5. Water volume monitor. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Please see Figure 1 and Figure 3 This utility model provides an embodiment of a concrete permeability testing device, including a testing box 1; it also includes a pressure plate 103, a spring 105, a sealing ring 106, a lip seal 107, and a fixing member 108. The testing box 1 is provided with a pressure plate 103 inside, and a fixing member 108 is provided at the bottom of the pressure plate 103. Multiple sets of fixing members 108 are provided, and multiple sets of springs 105 are provided at the bottom of the fixing member 108. A sealing ring 106 is provided at the end of the spring 105 away from the pressure plate 103. The sealing ring 106 is circular, and a lip seal 107 is provided on the inner wall of the sealing ring 106.

[0018] Please see Figure 1 and Figure 2 In this embodiment, a hydraulic cylinder 101 is installed inside the test box 1. Two sets of hydraulic cylinders 101 are provided. A pressure plate 103 is provided at one end of the hydraulic cylinder 101. A spray head 104 is provided at the bottom of the pressure plate 103. A corrugated pipe 102 is fixedly connected to the top of the spray head 104. The corrugated pipe 102 passes through the test box 1 and is fixedly connected to the first water supply pipe. A water pump 4 is provided at the other end of the first water supply pipe. The water pump 4 is located at the top of the test box 1. A second water supply pipe is provided on one side of the water pump 4. A filter box 3 is provided at the other end of the second water supply pipe. A third water supply pipe is provided on the outside of the filter box 3. The test box 1 is provided at the other end of the third water supply pipe. The hydraulic cylinder 101 drives the pressure plate 103 to move, pressing the concrete specimen and stretching the corrugated pipe 102 at the same time. The water pump 4 draws water from the filter box 3, passes through the water supply pipe, and sprays it out from the spray head 104, spraying water onto the surface of the concrete specimen.

[0019] Please see Figure 2 and Figure 4In this embodiment, a base plate 204 is provided at the bottom inner side of the detection box 1. A filter screen 205 is provided in the middle of the base plate 204. An operating table 201 is provided at the top of the base plate 204. The operating table 201 is hollow inside and a water filter plate 202 is provided at the top of the operating table 201. A U-shaped groove 203 is opened in the upper part of the base plate 204. The sides of the U-shaped groove 203 are sloping. A liquid collection box 2 is provided at the bottom of the base plate 204. The top of the liquid collection box 2 is open, and the shape of the opening is the same as the shape of the opening of the base plate 204. A water volume monitor 5 is installed on the side wall of 2. The water volume monitor 5 is connected to the liquid collection box 2. By placing the concrete specimen on the operating table 201, the water flowing out of the concrete pores flows through the filter plate 202 and the filter screen 205 into the liquid collection box 2. This can filter out the concrete debris carried out by the water flow and improve the accuracy of water volume measurement. The water volume is monitored by the water volume monitor 5 to calculate the permeability. At the same time, the water that does not flow through the concrete pores falls into the U-shaped groove 203 of the bottom plate 204 and enters the filter box 3 through the water supply pipe.

[0020] When testing the permeability of concrete, the test chamber 1 is opened, the concrete specimen is placed on the operating table 201, the test chamber 1 is closed, the hydraulic cylinder 101 is started, and the hydraulic cylinder 101 drives the pressure plate 103 to move, pressing the concrete specimen. At the same time, the corrugated pipe 102 is stretched, and the water pump 4 is started to draw water from the filter box 3. The water is sprayed out from the spray head 104 through the first water supply pipe and the second water supply pipe, and sprayed onto the surface of the concrete specimen. The water flows out from the pores of the concrete, passes through the filter plate 202, and through the filter screen 205 into the collection box 2. This can filter out the concrete debris carried by the water flow, improve the accuracy of water volume measurement, and monitor the water volume through the water volume monitor 5 to calculate the permeability. At the same time, the water that does not flow through the pores of the concrete falls into the U-shaped groove 203 of the bottom plate 204, enters the filter box 3 through the water supply pipe, and after filtration, it is sprayed back onto the concrete specimen through the water supply pipe, so that the water can be recycled.

[0021] Through the above steps, when the pressure plate 103 is pushed downward, the spring 105 is fixed by the fixing component 108, and the concrete specimen is squeezed by the sealing ring 106 and the lip seal ring 107. The height is automatically adjusted by the spring 105 according to the outline of the specimen to ensure sealing performance. Thus, while the pressure plate 103 squeezes the concrete, the sealing mechanism adheres to the concrete surface, improving the sealing performance, reducing the deviation of the water permeability value, and enhancing the practical value of the testing device.

[0022] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention 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 invention.

Claims

1. A concrete permeability testing device, comprising a testing box (1), characterized in that: It also includes a pressure plate (103), a spring (105), a sealing ring (106), a lip seal (107), and a fastener (108). The inside of the test box (1) is provided with a pressure plate (103), and a fastener (108) is provided at the bottom of the pressure plate (103). There are multiple sets of fasteners (108), and a spring (105) is provided at the bottom of the fastener (108). There are multiple sets of springs (105), and a sealing ring (106) is provided at the end of the spring (105) away from the pressure plate (103). The sealing ring (106) is circular, and a lip seal (107) is provided on the inner wall of the sealing ring (106).

2. The concrete permeability testing device according to claim 1, characterized in that: The inside of the test box (1) is equipped with a hydraulic cylinder (101), and there are two sets of hydraulic cylinders (101). One end of the hydraulic cylinder (101) is equipped with a pressure plate (103).

3. The concrete permeability testing device according to claim 1, characterized in that: A spray head (104) is provided at the bottom of the pressure plate (103), and a corrugated pipe (102) is fixedly connected to the top of the spray head (104). The corrugated pipe (102) passes through the test box (1) and is fixedly connected to the first water supply pipe. A water pump (4) is provided at the other end of the first water supply pipe. The water pump (4) is located at the top of the test box (1).

4. The concrete permeability testing device according to claim 3, characterized in that: A second water delivery pipe is provided on one side of the water pump (4), a filter box (3) is provided at the other end of the second water delivery pipe, a third water delivery pipe is provided on the outside of the filter box (3), and a detection box (1) is provided at the other end of the third water delivery pipe.

5. The concrete permeability testing device according to claim 1, characterized in that: The bottom of the inner side of the test box (1) is provided with a base plate (204), a filter screen (205) is provided in the middle of the base plate (204), an operating table (201) is provided on the top of the base plate (204), the interior of the operating table (201) is hollow, a water filter plate (202) is provided on the top of the operating table (201), and a groove (203) is provided on the upper part of the base plate (204), with slopes on both sides of the groove (203).

6. The concrete permeability testing device according to claim 5, characterized in that: A liquid collection box (2) is provided at the bottom of the base plate (204). The top of the liquid collection box (2) is open, and the shape of the opening is the same as that of the opening of the base plate (204). A water volume monitor (5) is provided on the side wall of the liquid collection box (2), and the water volume monitor (5) is connected to the liquid collection box (2) by signal.

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