First, the concrete accelerated maintenance box

1. Accelerate the cover of the maintenance box during use. Do not put it upside down (subject to the position of the signage on the cover).

2. When placing the test piece, leave the corresponding position of the temperature probe to avoid damage when the probe is inserted.

3. The test piece must be safe when it is put in and out. It is necessary to confirm whether the tool hook has firmly hooked the test piece when hooking the test piece with a special tool, in order to prevent the test piece from falling out of the hot water in the middle of the operation. Splash hurts people.

4. After the use of the accelerated maintenance box, the power supply must be cut off to prevent the electric heating tube from being inadvertently heated, resulting in dehydration or damage.

5. Accelerate the curing box when it is not used for a long time. Dry the water and put it in a dry and ventilated place.

Second, the concrete accelerated maintenance box Common faults and troubleshooting methods

1. The curing water is warming slowly or not;

a) Check the terminals of each heating tube and measure its resistance. If the terminal is found to be loose or the heating tube itself is broken, the terminal must be tightened or the heating tube must be replaced.

b) Check if the power fuse (fuse) is blown.

c) Check if the “Insulation/Heating” function selection switch is working properly.

d) Clean the surface of the heating pipe to ensure heating power.

2. There is a difference in holding time and no alarm at the end of the holding time;

a) If there is a difference in the holding time, check whether the set holding time is correct and the time relay is damaged.

b) Check that the input voltage meets the requirements for use.

Third, the concrete accelerated maintenance box structure and working principle

1. The concrete accelerated curing box consists of a maintenance department and a control box.

a) The maintenance department consists of a cover, an outer casing, a stainless steel inner tank, and a box foot. The shell and the inner tank are filled with high-efficiency insulation board, and a plurality of channel steels are used to carry the load of all the test pieces at the bottom. The maintenance box is designed with a water seal groove for one week, and four immersions are installed in the tank of the maintenance box. Heating pipe (the arrangement position is from the front right of the curing box, the first, third and fourth are 3kW heating pipes, the second one is 1kW heating pipe), and the bottom of the curing tank has a filling and draining port .

b) The control box is equipped with a full set of terminals for control instruments, electrical and all heating tubes.

2. Working principle

After heating the curing water or the test piece is put back, the test set water temperature is restored, and the four heating pipes are connected to the electrician at the same time.

After the desired test set water temperature is reached or the test set temperature is restored, the conversion of the heating/heating changeover switch is manually transferred to the heat preservation state by the warming state, and only one 1kW heating pipe is used in the heat preservation state. At work (conservation holding time is set by the user, just dial the digital display time relay dial to set the curing time). After the holding time expires, the alarm buzzer sounds to prompt the tester to turn off the power and take out the test piece.

Fourth, concrete accelerated maintenance box. How to use

1. Water injection: Open the lid to fill the tank. When the water surface is about 5cm away from the tank, stop the water injection. (At the same time as the water is injected, the tank should be filled with water along the saliva seal.) Cover the lid and turn it to the right. The temperature probe in the temperature measuring device jack on the control box is pulled out of the insertion box cover temperature measuring device jack.

2. Temperature rise: On the temperature control instrument, set the required maintenance water temperature value, turn on the power switch, and the maintenance water starts to warm up.

Note: The maintenance water must be transferred from the heating state to the heat preservation state by the test personnel by dialing the “warm/insulation” switch, so please pay attention to the tester!

When the temperature of the curing water in the box reaches the set temperature, turn off the power supply and pull out the temperature probe. The operator will open the cover slowly facing the front of the maintenance box. After opening the cover, use the special tool hook to test the test pieces one by one. Place it on the shelf in the water (leave the temperature probe position when placing the test piece). After the test piece is placed, cover the cover, insert the temperature probe, turn on the power, and the water temperature will quickly return to the set temperature. (When the temperature of the curing water is raised at 100 °C, the boiling water may overflow in a short period of time, and it will return to normal after entering the heat preservation state).

3. Insulation: On the control panel, the holding time control instrument, set the required holding time (in units), turn the “insulation/warming” switch to the heat preservation state, press the chronograph button, and the maintenance enters the heat preservation state. When the holding time is up, the buzzer sounds in the control box, prompting the operator to finish the maintenance and turn off the power.