1YZF-2ASplit type autoclavesummary:

A product developed in accordance with the requirements of the national standard GB/T750-1992 "Cement Steaming and Testing Method" for testing equipment. shouldcementSteaming kettleSuitable for determining the uneven volume changes of cement mainly caused by the hydration of magnesia, such as Portland cement, ordinary Portland cement, slag Portland cement, volcanic ash Portland cement, fly ash Portland cement, etc. It is also applicable to other cement products designated to use this standard.cementSteaming kettleIt is a specialized instrument used by cement production units, building materials research institutes, colleges and universities, and construction quality inspection departments to determine the adverse effects of MgO (magnesium oxide) in cement on its stability.

IIYZF-2ASplit type autoclaveStructure and principle:

cementSteaming kettleThe main components are mostly made of high-quality stainless steel materials, which can withstand high temperature and high pressure saturated water vapor. The kettle cover is equipped with a pressure gauge made of stainless steel, a safety valve, and two vent valves. The kettle body is installed inside the cylinder shell, and two heating resistors are installed at the lower outer part for heating the kettle body and producing water vapor; The bottom pipe is connected to the electric contact pressure gauge, which is coordinated with the electrical control system to control the pressure inside the kettle within the set range. The upper part of the cylinder shell is equipped with a ventilation ring, and the lower part is equipped with a ventilation plate to block or open the air around the kettle body. An exhaust fan is installed at the lower part to cool down after the experiment. The control box panel is equipped with a main power switch, three buttons for start, stop, and fan, four indicator lights for run, heating, fan, and stop, and a digital time relay for timing.

IIITechnical parameters:

1. Inner diameter of kettle body: 160mm

2. Kettle volume: 0.0085m cubic

3. Maximum working pressure: not exceeding 2.5MPa

4. Standard pressure rise time: 60-120 minutes. The pressure inside the pot rises to 2.0MPa (equivalent to a temperature of 216 ℃ inside the pot)

5. The opening pressure of the safety valve is 2.0-2.3MPa, which can be adjusted within the range

6. The fluctuation range of pressure automatic control: not greater than ± 0.05MPa

7. Rated working power: 220V

4YZF-2AInstallation instructions:

1．cementSteaming kettleIt should be installed in a relatively secluded place. To ensure safety and easy maintenance, it should be facing away from the wall, not less than 500mm away from the wall, and adjusted horizontally to be fixed on the foundation.

2. Use a soft copper wire of not less than 1.5mm2 tocementSteaming kettleReliable grounding.

3. Connect the aviation plug between the control box and the kettle body.

5Steaming kettleinstructions:

1. Open the kettle lid and inject 7% to 10% of the kettle's volume of 8.5L, which is 595cc to 850cc of distilled water, into the kettle. (Usually recommended water injection volume: 700ml~800ml)

2. Place the bracket containing the test piece intocementSteaming kettleInside.

3. Clean the sealing surfaces of the kettle mouth and lid with cotton yarn, and then apply a thin layer of clean engine oil on the sealing surface of the kettle mouth with a brush.

4. Gently cover the kettle lid, press down and rotate it left and right to confirm that the joint is properly sealed. Tighten 10 nuts by hand. Then use a torque wrench to tighten the nuts evenly in diagonal order three times at 50, 100, and 100 Nm, and install the kettle cover.

5. Inject 3-5 drops of engine oil into the thermometer tube at the center of the kettle cover (usually with the oil level not higher than the mercury bulb of the thermometer), and gently insert the 300 ℃ mercury thermometer into the tube.

6. Open either of the two release valves.

7. Adjust the red upper limit pointer of the electric contact pressure gauge to 2.025MPa (i.e. increase by half a grid at 2MPa); Adjust the green lower limit pointer to 1.975MPa.

8. Close the ventilation panel and ventilation ring.

9. Connect the power supply, turn on the main power switch on the control box, press the start button, the running and heating indicator lights will turn on, and the kettle body will start heating at 1800W power. At the same time, the digital time relay starts displaying.

When water vapor is discharged from an opened vent valve, it indicatescementSteaming kettleThe internal air has been completely expelled, close the vent valve. After the valve is closed, the pressure will increase with the rise of temperature (refer to the attached table for temperature and pressure). At this time, attention should be paid to whether the instrument is working abnormally. If there is any abnormality, the cause must be identified or the test must be stopped by pressing the stop button.

11. After stopping heating, the fan will automatically start working, the signal light will be on, the ventilation plate and ventilation ring will be opened, and hot air will be discharged from the ventilation ring. The pressure inside the kettle will drop below 0.1MPa within 90 minutes. At this point, the vent valve can be opened to release the remaining pressure inside the kettle. Please do not close the vent valve, as it may cause negative pressure inside the kettle and damage the pressure gauge after cooling.

12. WaitingcementSteaming kettleAfter cooling to room temperature, press the stop button, the signal light will turn off, the exhaust fan will stop, turn off the main power switch, remove the thermometer, and use the same method as installing the kettle cover to unscrew 10 fastening nuts (at least two cycles should be used to loosen the nuts to avoid damaging the sealing joint surface), remove the kettle cover, and take out the specimen bracket. Use a hose or towel to clean the distilled water inside the kettle.

13. Stop the test procedure midway: Press the "stop" button to open the ventilation plate and ventilation ring, press the "fan" button, wait for the instrument to cool down, and reinstall the test.

VIcementSteaming kettlePrecautions for use:

1. It is strictly prohibited tocementSteaming kettlePress the start button when there is no water inside to avoid burning out and damaging the heating resistor.

2. Only distilled water can be used to avoid leaving dirt in the kettle due to the use of other water, which may affect the testing accuracy.

3. IncementSteaming kettleDuring the experiment, the operator must not stay away from the post and should observe the working condition of the instrument at all times. If there are any abnormalities, effective measures should be taken in a timely manner, and the experiment should be stopped if necessary.

4．cementSteaming kettleDuring initial use, there may be a rubber odor, which is caused by the internal rubber asbestos insulation layer being heated. After 3-5 uses, it will return to normal.

5．cementSteaming kettleThe pressure gauge and electric contact pressure gauge should be sent for inspection on time to ensure reliable operation and correct testing. If there is a slight reading error between two pressure gauges during use, it is due to the inherent grade tolerance of the pressure gauge, which does not affect its use. Usually, the pressure indicator gauge is used as the standard.

6．cementSteaming kettleThe safety valve should be inspected twice a year. Usually, the holding pressure is too low, which can be detected during regular testing; If the holding pressure is too high, it can only be known through routine inspection. Although the kettle has undergone a 4MPa pressure sealing test during production, maintaining a high pressure is not very safe. The specific inspection method is to adjust the red upper limit pointer of the electric contact pressure gauge to 2.2MPa, follow the operation sequence during the test, and observe whether the exhaust starts when the pressure reaches 2.2MPa. If the exhaust is normal.

Supporting products:

1. Length meter

2. Measure the nail head

3. Triple trial model

4. Mixing spoon

5. Mixing pot

6. Smashing stick