VAREM计量泵和气动隔膜泵有哪些区别？
在化工加药和污水处理生产环节中，我们经常会用到各种泵类，VAREM计量泵和气动隔膜泵是比较常用的两种形式的泵。那么这两种泵有什么区别呢？
首先，让我们看看LMG计量泵的原理:
LMG小型隔膜计量泵结构：该泵由电机、传动箱和泵头组成。1.1传动箱由凸轮机构、行程调节机构和速比蜗轮机构组成，通过转动调节手轮来调节挺杆行程，改变膜片从表面的膨胀距离来改变流量数量的目的。1.2缸体由泵头、吸入阀组、排出阀组、隔膜座等组成。LMG型小隔膜计量泵的工作原理：电机通过联轴器带动蜗杆，减速蜗轮使主轴和偏心轮转动，偏心轮带动挺杆在导向缸内往复运动快走。与隔膜一起，通过单向阀的作用在泵腔内逐渐形成真空，吸入阀打开，液体被吸入；当隔膜向前移动时，吸入阀关闭，排出阀打开，液体在隔膜的推动下排出。在泵的往复运动中通过调整一定的行程也可以顺时针工作，形成连续的压力液体定量排放。三。流量调节特性：泵的流量调节依靠调节手轮的转动带动调节螺杆的转动，从而改变挺杆之间的距离和隔膜在泵腔内的位移行程来确定流量。调整手轮刻度，确定隔膜行程，精度为95%。流动重复性：准确率可达1%。
我们来看看VAREM气动隔膜泵，它在易燃易爆的环境中，如燃料、火药、炸药的运输，可靠性高，成本低，因为：第一，接地后不可能产生火花；第二，工作中没有热量，机器不会过热；第三，液体不会过热，因为隔膜泵对液体的搅动很小。2 气动隔膜泵在建筑工地、工矿废水排放等恶劣场所，由于污水中含有杂质且成分复杂，管道容易堵塞，因此电泵会形成高负荷的情况，电机也容易发热。气动隔膜泵可通过颗粒，流量可调。当管道被堵塞时，它会自动停止，直到畅通为止。3.另外，WaterSunny气动隔膜泵体积小，移动方便，不需要基础，占地面积小，安装方便，经济实惠。可用作移动式物料输送泵。4在处理危险和腐蚀性物质时，隔膜泵能将物质与外界完全分离。5气动隔膜泵可用于输送化学性质不稳定的流体，如：感光材料、絮凝剂等。这是因为隔膜泵剪切力低，对材料的物理影响小。
气动隔膜泵在工业领域的作用是巨大的，许多难以用人手完成的工作都可以通过气动隔膜泵来完成，间接保证了员工的安全。
总之，VAREM计量泵主要用于小流量和微流量，精度要求高，动力部分一般为电动；而气动隔膜泵主要用于大流量和中流量，精度要求高，动力部分一般为气源。以上是varem计量泵与气动隔膜泵的区别。欲了解更多变量计量泵和气动隔膜泵，请咨询上海龙亚泵技术部。
What are the differences between varem metering pump and pneumatic diaphragm pump?
In the chemical dosing and sewage treatment production, we often use a variety of pumps, varem metering pump and pneumatic diaphragm pump are two kinds of commonly used pumps. So what's the difference between these two pumps?
First, let's look at the principle of LMG metering pump
LMG small diaphragm metering pump structure: the pump is composed of motor, transmission box and pump head. 1.1 the transmission box is composed of cam mechanism, stroke adjusting mechanism and speed ratio worm gear mechanism. The tappet stroke is adjusted by turning the adjusting hand wheel, and the flow quantity is changed by changing the expansion distance of the diaphragm from the surface. 1.2 the cylinder block is composed of pump head, suction valve group, discharge valve group, diaphragm seat, etc. Working principle of LMG small diaphragm metering pump: the motor drives the worm through the coupling, decelerates the worm wheel to make the spindle and eccentric wheel rotate, and the eccentric wheel drives the tappet to move back and forth in the guide cylinder. Together with the diaphragm, a vacuum is gradually formed in the pump cavity through the action of the one-way valve, the suction valve is opened, and the liquid is inhaled; when the diaphragm moves forward, the suction valve is closed, the discharge valve is opened, and the liquid is discharged under the push of the diaphragm. In the reciprocating motion of the pump, by adjusting a certain stroke, it can also work clockwise to form a continuous pressure liquid quantitative discharge. Three. Flow regulation characteristics: the flow regulation of the pump depends on the rotation of the regulating hand wheel to drive the rotation of the regulating screw, so as to change the distance between tappets and the displacement stroke of the diaphragm in the pump cavity to determine the flow. Adjust the hand wheel scale to determine the diaphragm stroke, the accuracy is 95%. Flow repeatability: the accuracy can reach 1%.
Let's take a look at the varem pneumatic diaphragm pump. It has high reliability and low cost in inflammable and explosive environment, such as the transportation of fuel, gunpowder and explosive, because: first, there is no spark after grounding; second, there is no heat in the work, so the machine will not overheat; third, the liquid will not overheat, because the diaphragm pump stirs the liquid very little. In the construction site, industrial and mining wastewater discharge and other bad places, because the sewage contains impurities and the composition is complex, the pipeline is easy to block, so the electric pump will form a high load situation, and the motor is also easy to heat. Pneumatic diaphragm pump can pass through particles, and the flow rate is adjustable. When the pipe is blocked, it will stop automatically until it is unblocked. 3. In addition, watersunny pneumatic diaphragm pump is small in volume, easy to move, no foundation, small in floor area, easy to install and economical. It can be used as mobile material delivery pump. When dealing with dangerous and corrosive substances, diaphragm pump can completely separate substances from the outside world. 5 pneumatic diaphragm pump can be used to transport unstable chemical properties of the fluid, such as: photographic materials, flocculants, etc. This is because the diaphragm pump shear force is low, the physical impact on the material is small.
Pneumatic diaphragm pump plays a huge role in the industrial field. Many difficult tasks can be completed by hand, which indirectly ensures the safety of employees.
In short, the varem metering pump is mainly used for small flow and micro flow, with high accuracy requirements, and the power part is generally electric; while the pneumatic diaphragm pump is mainly used for large flow and medium flow, with high accuracy requirements, and the power part is generally air source. The above is the difference between varem metering pump and pneumatic diaphragm pump. For more information about variable displacement metering pump and pneumatic diaphragm pump, please consult Shanghai Longya pump technology department.