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Share the principle and purchase plan of electric elevator

2020-07-07 16:07

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Principle of electric elevator: hydraulic oil is formed by a vane pump to a certain pressure, and enters the lower end of the cylinder through the oil filter, explosion-proof electromagnetic reversing valve, throttle valve, hydraulic control check valve, and balance valve to make the piston of the cylinder upward When moving, lifting the weight, the oil return from the upper end of the cylinder is returned to the oil tank through the flameproof electromagnetic reversing valve, and its rated pressure is adjusted by the overflow valve, and the reading value of the pressure gauge is observed through the pressure gauge.

The piston of the hydraulic cylinder moves downward (not only the weight drops). The hydraulic oil enters the upper end of the cylinder through the explosion-proof electromagnetic reversing valve, and the return oil from the lower end of the cylinder returns to the tank through the balance valve, hydraulic control check valve, throttle valve, and explosion-proof electromagnetic reversing valve. In order to make the heavy objects fall smoothly and brake safely and reliably, a balance valve is installed on the oil return path to balance the circuit and maintain the pressure so that the descending speed will never change due to the weight. The throttle valve adjusts the flow rate and controls the lifting speed.

In order to make the brake safe and reliable, and prevent accidents, a hydraulic control check valve, namely hydraulic lock, is added to ensure that it can lock itself safely when the hydraulic pipeline bursts accidentally. An overload sound-activated alarm is installed to distinguish overload or equipment failure. The electronic control system can control the rotation of the motor through the explosion-proof button to change the direction of the explosion-proof electromagnetic directional valve to keep the load rising or falling, and adjust the time delay through the "LOGO" program to avoid frequent starting of the motor. The lifting caused by it is absolutely inflexible, and the phenomenon of jamming.

Purchase plan:

1. When purchasing electric lifting machinery, you must not buy it blindly. It is necessary to do adequate market research and field inspections to determine the company's scale and credibility. This is first and foremost. Many small-scale companies in the market cut corners in order to seek violence, thereby greatly reducing the quality of lifting products. Although they will sell very cheaply, this kind of machinery takes time and is never long, so it is dangerous. The coefficient is large. Therefore, as a buyer, you must not covet a small price bargain, which leads to greater and greater regrets.

2. Based on the information you have investigated, choose an electric lifting machine with better cost performance. You must choose from its technical parameters and practicality and versatility. There are many kinds of general electric lifting machines, including (vehicle type, fixed type) , Hydraulic pressure, scissor type, etc.) Each technical parameter and purpose are slightly different, but there are also many functions that are similar. Therefore, as a customer, you have to purchase with a purpose, that is, you buy a lifting machine What to do with the formula, and what kind of lifting machinery can meet your needs and has many uses.

3. The last point is that after the equipment arrives, when unpacking and accepting, check whether the random technical data is complete, whether the probability accessories, tools, and accessories are consistent with the list, whether the equipment and accessories are damaged, defective, etc., and do the unpacking acceptance recording.

maintenance:

The electric lift has been inspected and debugged before leaving the factory, and all technical indicators have reached the design requirements. When using it, it only needs to be connected to the power supply, and the hydraulic and electrical systems never need to be adjusted. Pay attention to the use of the electric elevator, and it must be placed on a solid and level ground to prevent it from tipping over during work. Press the "up" or "down" button to lift the workbench. If the workbench never moves, it should be shut down immediately for inspection. When the working pressure of the electric elevator is so high or the sound is abnormal, it should be shut down and checked immediately to prevent serious damage to the machine; check the working condition of the shaft pin regularly every month, such as finding that the shaft pin and screw are loose, and some must be locked to prevent serious damage. Prevent the axle pin from falling off and cause an accident. The hydraulic oil should be kept clean and changed more and more every 6 months; when repairing and cleaning the lift, the safety brace must be supported.

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