液壓隔膜計量泵的結構原理及泵體凍結的解決方法
常見故障及解決方法：
1、吸入閥或排出閥中有雜質如果吸入閥中有雜質，在泵的排出行程中，吸入閥不會完全關閉，形成泵送介質全部或部分回流的現象，造成泵無流量或流量不足。如果排出閥中有雜質，在泵的吸入行程中，它不會完全關閉，形成排出介質全部或部分回流的現象，也會造成泵的無流量或流量不足。這個問題可以通過清洗吸入閥和排出閥來解決。
2、吸入閥和排出閥磨損嚴重。如果吸入閥和排出閥磨損嚴重，密封不會失效，形成與1相同的介質回流條件。如果發生這種情況。能及時更換alwater液壓隔膜泵吸入閥和排出閥的相關磨損件，實現ALIWATER液壓隔膜計量泵的正常運行。
3、吸入閥和排出閥反向安裝。如果吸入閥和排出閥反向安裝，則不會出現流動現象，因此在清洗吸入閥和排出閥后，必須按泵的原安裝順序安裝。
如果泵凍結了怎么辦？
一般來說，可以用熱毛巾熱敷。如果計量泵外的溫度很低，可以用溫水倒水，但不能用開水（因為開水會增加冷熱差，容易使泵體開裂）。
液壓隔膜計量泵的結構原理：
液壓隔膜計量泵由電機驅動機構和液壓系統組成。
2.1傳動機構
2.1.1電動機的動力傳遞給蝸桿和蝸輪，實現減速旋轉，從而促進曲軸和連桿機構的往復運動，驅動柱塞產生液壓。
2.1.2行程調節機構由曲軸、偏心輪、調節螺母、調節螺桿、調節手輪（手柄）、刻度盤（指針）、刻度盤等組成。通過改變偏心距來實現柱塞的相對行程。
2.2液壓系統
2.2.1 ALIWATER液壓隔膜計量泵的液壓系統由柱塞、缸體、缸蓋、進出口閥、液壓隔膜和三個閥（排氣過載閥、限位閥、補償閥）組成。在工作中，液壓隔膜計量泵的隔膜將液壓油和介質分開，因此液壓隔膜計量泵具有泄漏的優點。
2.2.2 ALIWATER液壓隔膜計量泵液壓端柱塞由傳動端曲柄連桿機構往復運動驅動。柱塞在液壓腔中往復運動，使液壓油的壓力發生變化，使液壓膜片發生撓曲位移，輸送介質。液壓腔中液壓油的相對穩定性是通過三通閥的作用來維持的。
2.2.3過載閥：自動將液壓油中的氣體排放到液壓腔中，保證工作平穩，避免因液壓油過多或排放管路堵塞而造成超壓，并自動打開負載閥，達到保護的目的。
2.2.4限位補償裝置是利用液壓膜片推動限位閥的開度，并根據液壓腔內的真空度隨時補充油量，以保證液壓腔內的液壓油充滿。

The structure principle of hydraulic diaphragm metering pump and the solution of pump freezing
Common faults and solutions:
1. There are impurities in the suction valve or discharge valve. If there are impurities in the suction valve, the suction valve will not be completely closed during the discharge stroke of the pump, resulting in the phenomenon of full or partial backflow of the pumping medium, resulting in no flow or insufficient flow of the pump. If there are impurities in the discharge valve, in the suction stroke of the pump, it will not be completely closed, forming the phenomenon of all or part of the discharge medium backflow, which will also cause no flow or insufficient flow of the pump. This problem can be solved by cleaning the suction and discharge valves.
2. The suction valve and discharge valve are seriously worn. If the suction valve and discharge valve wear seriously, the seal will not fail, forming the same medium reflux conditions as 1. If that happens. It can timely replace the relevant wear parts of suction valve and discharge valve of alwater hydraulic diaphragm pump, and realize the normal operation of ALIWATER hydraulic diaphragm metering pump.
3. The suction valve and the discharge valve are installed in reverse. If the suction valve and discharge valve are installed reversely, there will be no flow phenomenon. Therefore, after cleaning the suction valve and discharge valve, they must be installed according to the original installation sequence of the pump.
What if the pump freezes?
Generally speaking, you can use a hot towel to compress. If the temperature outside the metering pump is very low, warm water can be used to pour water, but boiling water cannot be used (because boiling water will increase the difference between cold and heat, which is easy to crack the pump body).
Structure principle of hydraulic diaphragm metering pump:
The hydraulic diaphragm metering pump is composed of motor driving mechanism and hydraulic system.
2.1 transmission mechanism
2.1.1 the power of the motor is transmitted to the worm and worm gear to realize the deceleration rotation, so as to promote the reciprocating motion of the crankshaft and connecting rod mechanism and drive the plunger to generate hydraulic pressure.
2.1.2 the stroke adjusting mechanism is composed of crankshaft, eccentric wheel, adjusting nut, adjusting screw, adjusting hand wheel (handle), dial (pointer), dial, etc. The relative stroke of the plunger is realized by changing the eccentricity.
2.2 hydraulic system
2.2.1 the hydraulic system of ALIWATER hydraulic diaphragm metering pump is composed of plunger, cylinder block, cylinder head, inlet and outlet valves, hydraulic diaphragm and three valves (exhaust overload valve, limit valve and compensation valve). In work, the diaphragm of the hydraulic diaphragm metering pump separates the hydraulic oil from the medium, so the hydraulic diaphragm metering pump has the advantage of leakage.
2.2.2 the plunger at the hydraulic end of the ALIWATER hydraulic diaphragm metering pump is driven by the reciprocating motion of the crank connecting rod mechanism at the transmission end. The plunger moves back and forth in the hydraulic cavity, which changes the pressure of the hydraulic oil and flexes the hydraulic diaphragm to transport the medium. The relative stability of the hydraulic oil in the hydraulic chamber is maintained by the function of the three-way valve.
2.2.3 overload valve: automatically discharge the gas in the hydraulic oil into the hydraulic cavity to ensure smooth operation, avoid overpressure caused by too much hydraulic oil or blockage of discharge pipeline, and automatically open the load valve to achieve the purpose of protection.
2.2.4 the limit compensation device uses the hydraulic diaphragm to push the opening of the limit valve, and replenishes the oil at any time according to the vacuum degree in the hydraulic cavity, so as to ensure that the hydraulic oil in the hydraulic cavity is full.