Vehicle mounted hydraulic lifting platforms are a relatively important mechanical use on many construction sites. Therefore, there will be more trading phenomena in the Chinese market, but when purchasing such machinery, due to the presence of more types of vehicle mounted hydraulic lifting platforms, different types of platforms have different functions. Therefore, when purchasing, we should pay attention to the following points:

当我们购买车载式液压升降平台时，我们必须确定我们自己的购买目标。升降机原理：液压油由叶片泵形成一定的压力，经滤油器、隔爆型电磁换向阀、节流阀、液控单向阀、平衡阀进入液缸下端，使液缸的活塞向上运动，提升重物，液缸上端回油经隔爆型电磁换向阀回到油箱，其额定压力通过溢流阀进行调整，通过压力表观察压力表读数值。

When we purchase a car mounted hydraulic lifting platform, we must determine our own purchasing goals. Elevator principle: Hydraulic oil is formed by a vane pump to a certain pressure, and enters the lower end of the hydraulic cylinder through an oil filter, explosion-proof electromagnetic directional valve, throttle valve, hydraulic control one-way valve, and balance valve, causing the piston of the hydraulic cylinder to move upwards and lift the heavy object. The return oil from the upper end of the hydraulic cylinder returns to the oil tank through the explosion-proof electromagnetic directional valve, and its rated pressure is adjusted through the overflow valve. The reading value of the pressure gauge is observed through the pressure gauge.

对于销售车载式液压升降平台的部门来说，这也是我们选择和购买车载式液压升降平台的一个重要部分。升降机厂家液缸的活塞向下运动（既重物下降）。液压油经防爆型电磁换向阀进入液缸上端，液缸下端回油经平衡阀、液控单向阀、节流阀、隔爆型电磁换向阀回到油箱。

For departments that sell car mounted hydraulic lifting platforms, this is also an important part of our selection and purchase of car mounted hydraulic lifting platforms. The piston of the elevator manufacturer's hydraulic cylinder moves downwards (i.e. the weight drops). The hydraulic oil enters the upper end of the hydraulic cylinder through the explosion-proof electromagnetic directional valve, and the return oil from the lower end of the hydraulic cylinder returns to the oil tank through the balance valve, hydraulic control one-way valve, throttle valve, and explosion-proof electromagnetic directional valve.

为使重物下降平稳，制动可靠，在回油路上设置平衡阀，平衡回路、保持压力，使下降速度不受重物而变化，由节流阀调节流量，控制升降速度。而主要的关注点是销售单位的信誉。对于信誉较低的机组，如果配合使用，在使用车载式液压升降平台的过程中，会出现更多的质量问题，甚更大的事故。

To ensure a smooth descent of heavy objects and safe and reliable braking, a balance valve is installed on the return oil circuit to balance the circuit and maintain pressure, so that the descent speed does not change due to heavy objects. The throttle valve regulates the flow and controls the descent speed. The main focus is on the credibility of the sales unit. For units with lower reputation, if used in conjunction, more quality issues and even greater safety accidents may occur during the use of vehicle mounted hydraulic lifting platforms.

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