Pavement brick water permeability vacuum device Water permeability vacuum device

Vacuum device for water permeability coefficient of pavement tiles 1. Introduction to vacuum device for water permeability coefficient
It is suitable for vacuum testing of pavement tiles, cement concrete permeable bricks and other samples. The water permeability vacuum device adopts a new design and technology, which has the advantages of low energy consumption, low noise, easy installation, simple operation, and high safety performance. It can do multiple samples at one time, saving time and effort. It is an ideal choice for testing units, municipal inspections, and schools. and other necessary testing tools.
2. Technical parameters of water permeability vacuum device
Vacuum limit
Working voltage
Pumping rate./
Power
Specimen cylinders (optional)
Overall dimensions (diameter * height)
3. Standard basis
"Technical Specifications for Permeable Cement Concrete Pavement", "Permeable Pavement Bricks and Permeable Pavement Panels" and any other requirements can be used.
3. Installation method of water permeability vacuum device
Install the valve with the pressure gauge and the water inlet valve on the cover of the water permeability vacuum device respectively. Install the connecting pipe between the vacuum pump and the vacuum device (the end with the universal joint is connected to the vacuum pump) and the water inlet pipe. Add lubricating oil to the filling plug of the vacuum pump and check the oil level. It is not lower than the oil level line. If it is lower than the oil level line, refuel in time.
Put the prepared sample into the sample tube and make a mark on the wall of the box where the sample points upward.
. Cover the hatch cover and check whether the connecting pipes are tightly connected. Place the other end of the water inlet pipe into a container of still water. Close the water inlet valve.
Plug in the power supply, open the exhaust valve on the vacuum device, close the exhaust valve, and start the vacuum pump switch. When the required pressure is reached, first turn off the vacuum pump switch, and then close the exhaust valve of the vacuum device.
After use, unplug the power plug in time, remove the connecting pipe, and tighten the inlet cap and exhaust cap on the vacuum pump.
3. Water permeability coefficient vacuum device test steps
Use a steel ruler to measure the diameter and thickness of the cylindrical sample, measure twice, and average the value until it is accurate enough to calculate the surface area of the sample
Seal the surroundings of the sample with sealing materials or other means to make it watertight, and water only penetrates from the upper and lower surfaces of the sample. After the sealing material is cured, put the sample into the water permeability vacuum device, vacuum to , and maintain. While maintaining the vacuum, add enough water to cover the sample and make the water higher than the sample. Stop vacuuming and soak , take it out, put it into the water permeability coefficient testing device, and connect the sample to the water permeable cylinder. Put it into the overflow tank, open the water supply valve, and let still water enter the container. When water flows out of the overflow hole of the overflow tank, adjust the water inflow so that the permeable cylinder maintains a certain water level (approximately). Wait until the overflow tank After the amount of water flowing out of the overflow port and the overflow port of the permeable cylinder is stable, use a measuring cylinder to collect water from the water outlet, record the amount of water flowing out in five minutes, measure three times, and take the average.
Use a steel ruler to measure the difference between the water level of the permeable cylinder and the overflow tank, accurate to
Use a thermometer to measure the temperature of the water in the overflow tank during the test, accurate to .℃
4. Precautions for water permeability vacuum device
When the water permeability vacuum device is releasing pressure, the pressure of the relief valve is high. Do not approach the valve pressure relief port with your hands.
After use, unplug the power plug in time, remove the connecting pipe, and tighten the inlet cap and exhaust cap on the vacuum pump.
After using the vacuum device, wipe it clean for next use.
4. Packing list of water permeability vacuum device
, valves with pressure gauge
, water inlet valves
, vacuum pump pipes
, water inlet pipes
br/>, vacuum chamber cover
, vacuum pump
, lubricating oil
, steel ruler handle