The automatic control of the main and secondary clinker storage in the cement plant is controlled by an (800 * 800) electro-hydraulic flat gate in the top material pipe of the clinker storage, as shown in Figure 1. In long-term operation, frequent malfunctions occur and automatic control cannot be achieved. Every time the warehouse is changed, workers need to use a hoist to pull out or push in the flat gate valve from the top of the clinker warehouse, which is time-consuming, laborious, and not conducive to controlling the quality of clinker.

Problems in the use of electro-hydraulic flat gate: As shown in Figure 1, the distance between oil cylinder 1 and oil cylinder 2 is 120mm from the material pipe. The temperature of the clinker in the material pipe is high, and the radiation heat has a damaging effect on the sealing rings of oil cylinder 1 and oil cylinder 2. The new oil cylinder or sealing ring is damaged in less than a week after replacement, especially in the position of oil cylinder 2, where the sealing ring is damaged faster and automatic control cannot be achieved.

Due to the close proximity of oil cylinder 1 and oil cylinder 2 to the material pipe, the temperature of the clinker in the material pipe can reach around 150 ℃, which may exceed 300 ℃ when there is material flushing in the kiln. At this time, the flat gate valve is closed, and the high-temperature clinker accumulates on the gate valve. After reaching a certain height, the clinker begins to enter the secondary material warehouse. Therefore, the sealing ring inside the oil cylinder is easily damaged and ineffective by the high-temperature clinker. Replacing high-temperature resistant seals is not a long-term solution, and structural changes to the product may solve the problem.

Firstly, we need to increase the distance of the oil to the high temperature area. We start the renovation from this point, as shown in Figure 2. Firstly, we replace two new oil cylinders. Through manual control, we push the push rods of oil cylinder 1 and oil cylinder 2 to the top position, that is, open the gate to the maximum position. Then, we remove the top pin axis (at the B-B axis) of the push rods of oil cylinder 1 and oil cylinder 2. After retracting the push rods of oil cylinder 1 and oil cylinder 2 to the position equivalent to the full closure of the gate, we remove the oil supply hose and electro-hydraulic drive device of the oil cylinder. Finally, we remove the fixed pin axis on the support ear of the oil cylinder base. After fixing the top pin axis (at the B-B axis) of the push rods of oil cylinder 1 and oil cylinder 2, we take the center line of the top pin axis of the push rod of the oil Rotate outward by 180 °, extend the electro-hydraulic flat gate bracket (No. 20 channel steel, original length 2060mm) by 1000 mm, and add two legs at the tail to fix it to the floor surface, Fix the support ears on the base of cylinder 1 and cylinder 2 onto the extended frame, retrofit the electro-hydraulic drive device above the new frame, connect the original oil supply hose of the cylinder, and switch the electrical control on and off to reconnect. After the above transformation, the distance between the cylinder bodies of cylinder 1 and cylinder 2 and the material pipe is 995mm, away from the radiation heat source, and the sealing ring inside the cylinder is not easily damaged. After running for three months, the oil cylinder operated normally and the sealing ring was intact and undamaged; Both lines have been running until now, and the automatic control of the clinker exchange gate is normal and effective.

Many customers need to describe the usage environment as clearly as possible when purchasing products, which can help our company develop higher quality products to reduce production costs and provide production capacity. Electric hydraulic flat gate combined with manual operation is safe and efficient