流量儀表的檢驗和校準(zhǔn)
檢查/校準(zhǔn)
Inspection/calibration
檢驗校準(zhǔn)使用通用標(biāo)準(zhǔn)流程處理，如目視檢查、拆卸/檢查、零件更換/維修、清潔、流量校正/校準(zhǔn)等。校準(zhǔn)方法將根據(jù)日本工業(yè)標(biāo)準(zhǔn)（使用浮子面積流量計的測量方法）進(jìn)行選擇。 （出具檢驗結(jié)果）
檢驗項目會根據(jù)所使用的工藝、連續(xù)/間歇操作、流體狀況、安裝位置（室內(nèi)/室外）、流量計類型等而有所不同，除特殊情況外，檢查和校準(zhǔn)通用標(biāo)準(zhǔn)項目。主要管理項目包括目視檢查、修理、拆卸清洗、零件更換、脈動和流量快速變化、修正系數(shù)計算等。將根據(jù)日本工業(yè)標(biāo)準(zhǔn)（使用浮子面積流量計測量流量的方法）選擇校準(zhǔn)方法，具體取決于要測量的流體和測量系統(tǒng)的類型（校準(zhǔn)方法將在檢查報告中注明） 。
Handle general standard processes such as visual inspection, disassembly/inspection, parts replacement/repair, cleaning, flow correction/calibration, etc. The calibration method will be selected based on the Japanese Industrial Standards (measurement method using a float area flow meter). (Issuance of inspection results)
Items to be inspected will vary depending on the process used, continuous/intermittent operation, fluid condition, installation location (indoor/outdoor), type of flowmeter, etc. , except in the case of special conditions, will inspect and calibrate general standard items. The main management items include visual inspection, repair, disassembly and cleaning, parts replacement, pulsation and rapid flow changes, and calculation of correction coefficients. The calibration method will be selected based on the Japanese Industrial Standards (Method of measuring flow rate using a float area flowmeter), depending on the fluid to be measured and the type of measurement system (the calibration method will be stated in the inspection report).
檢驗管理項目
Inspection management items
? 錐形管上的污垢
? 浮子的運動
? 流體密封泄漏
? 與流體接觸部件的腐蝕
? 浮體腐蝕/變形
? 溫度、壓力等測量條件的變化
? Dirt on the tapered pipe
? movement of float
? Leakage from fluid seal
? Corrosion of parts in contact with fluid
? Corrosion/deformation of float
? Changes in measurement conditions such as temperature and pressure
檢驗管理項目
Inspection management items
? 請選擇震動小的地方安裝。另外，請選擇易于更換和清潔浮子及其他部件的安裝位置。
? 安裝時應(yīng)使錐形管的中心軸垂直。如果錐形管的中心軸相對于垂直線傾斜，精度和靈敏度會下降，因此請注意上升管的垂直度和安裝面的水平度。
? 提供旁通管路，這樣即使流量計因維修或保養(yǎng)而被拆下，操作也不會受到影響。
? 固定管道，使管道系統(tǒng)中產(chǎn)生的應(yīng)力不會傳遞到流量計。
? 避免在入口或出口之前快速膨脹或收斂，因為這可能會導(dǎo)致浮子變得不穩(wěn)定。
? 緩慢地打開和關(guān)閉閥門，以避免流量計突然受到?jīng)_擊。 （FLO-PL18型/FLO-L68型）
? 小心不要讓錐形管（硬玻璃）遭受突然的溫度變化。
? 請注意不要使用被異物污染的液體，否則可能會導(dǎo)致故障。
? 為防止液體結(jié)冰造成損壞，冬季停止運行時應(yīng)排空液體或保溫。
? 錐形管上有污垢
? Please choose a location with little vibration for installation. Also, please select an installation location where it is easy to replace and clean the float and other parts.
? Install so that the center axis of the tapered pipe is vertical. If the central axis of the tapered pipe is tilted with respect to the vertical line, accuracy and sensitivity will decrease, so please be careful about the verticality of the rising pipe and the horizontality of the mounting surface.
? Provide a bypass line so that even if the flowmeter is removed for repairs or maintenance, operation will not be affected.
? Fix the piping so that the stress generated in the piping system is not transmitted to the flowmeter.
? Avoid rapid expansion or convergence immediately before the inlet or outlet, as this may cause the float to become unstable.
? Open and close the valve slowly to avoid sudden shock to the flow meter. (FLO-PL18 type/FLO-L68 type)
? Be careful not to subject the tapered tube (hard glass) to sudden temperature changes.
? Be careful not to use fluids that are contaminated with foreign substances, as this may cause malfunctions.
? To prevent damage due to fluid freezing, drain the fluid or keep it warm when suspending operation in winter.
? Dirt on the tapered pipe
面積流量計原理
Principle of area flow meter
面積流量計的流量測量部分有一根垂直安裝在管道上的錐形管和一個在錐形管之間上下移動的浮子（可動部分），流體從錐形管的底部進(jìn)入并向上流出。
當(dāng)流體開始流動時，浮子前后會產(chǎn)生壓力差，浮子上下移動，因此無論流量如何變化，此時在浮子和浮子之間都會產(chǎn)生壓力差。錐形管的環(huán)形面積與流量成正比關(guān)系。隨著流量增大，浮子向上運動，環(huán)形面積增大，產(chǎn)生向上的力（前后壓差、流體產(chǎn)生的浮力、浮子表面摩擦力等）和向下的力（浮子的重量） ）可以保持靜止，直接或間接檢測位置，測量瞬時流量值。
The flow rate measurement part of an area flow meter has a tapered pipe installed vertically on the pipe and a float (movable part) that moves up and down between the tapers, and the fluid enters from the bottom of the tapered pipe and flows out upward.
When fluid begins to flow, a pressure difference is created in front and behind the float, and the float moves up and down so that this pressure difference remains constant regardless of changes in flow rate. At this time, it is created between the float and the tapered pipe. There is a proportional relationship between the annular area and flow rate. As the flow rate increases, the float moves upward and the annular area increases, and the upward force (differential pressure before and after, buoyant force due to the fluid, float surface friction force, etc.) and downward force (weight of the float) are balanced. It can stand still at a position, detect the position directly or indirectly, and measure the instantaneous flow value.
聲明：
- 文章轉(zhuǎn)載自RYUKI，由愛澤工業(yè)翻譯，如有侵權(quán)，請聯(lián)系刪除！
- 如有偏頗，歡迎指正！
