1. Valve's demand for driving equipment:

為了使良工閥門和驅(qū)動設(shè)備和諧作業(yè)，形成一個完善的主體，有必要確保驅(qū)動設(shè)備的技能特性徹底滿意閥門操作特性的需求。下面分別從閥門操作特性和運(yùn)用條件等要素，剖析閥門對驅(qū)動設(shè)備提出的技能需求。

In order to ensure the harmonious operation of skilled valves and driving equipment, and to form a complete entity, it is necessary to ensure that the technical characteristics of the driving equipment fully meet the requirements of valve operation characteristics. The following analyzes the skill requirements of valves for driving equipment based on factors such as valve operating characteristics and application conditions.

(1) 應(yīng)具有使閥門牢靠作業(yè)的輸出轉(zhuǎn)矩或力，驅(qū)動設(shè)備的輸出轉(zhuǎn)矩或力與配用閥門所需的轉(zhuǎn)矩或力相習(xí)慣，才干確保閥門牢靠作業(yè)。閥門和驅(qū)動設(shè)備是兩個不一樣的主體，兩者的加工、設(shè)備、設(shè)備等條件對其操作特性都有很大影響，閥門的作業(yè)介質(zhì)、溫度、環(huán)境高溫多塵、操作時刻距離過長等，都會使閥門的操作轉(zhuǎn)矩發(fā)生很大改變。因而，在選用閥門驅(qū)動設(shè)備時，閥門驅(qū)動設(shè)備的輸出轉(zhuǎn)矩必定要有必定的裕量，而又不能超過閥門零部件的答應(yīng)強(qiáng)度極限，通常應(yīng)以閥門實(shí)際需要負(fù)荷的 1.2~1.5倍為宜。

(1) To ensure the reliable operation of the valve, it is necessary to have an output torque or force that enables the valve to operate reliably, and the maximum output torque or force of the driving equipment should be consistent with the torque or force required for the matched valve. Valves and driving equipment are two different entities, and the processing, equipment, and equipment conditions of both have a significant impact on their operating characteristics. The operating medium, temperature, high temperature and dust in the environment, and long operating distance of the valve can all cause significant changes in the operating torque of the valve. Therefore, when selecting valve driving equipment, there must be a certain margin for the output torque of the valve driving equipment, and it cannot exceed the allowable strength limit of the valve components. It is usually advisable to use 1.2 to 1.5 times the actual maximum load required by the valve.

(2) 應(yīng)能確保啟閉閥門具有不一樣的操作轉(zhuǎn)矩，對大多數(shù)閥門來說，閥門封閉后再次開啟時所需的轉(zhuǎn)矩比封閉閥門時所需的轉(zhuǎn)矩要大得多，這個數(shù)據(jù)通常是50% ，在某些狀況下，這個操作轉(zhuǎn)矩的數(shù)值可能會更大。

(2) It should be ensured that the opening and closing valves have different operating torques. For most valves, the torque required when the valve is closed and reopened is much greater than the torque required when the valve is closed. This data is usually 50%, and in some cases, the value of this operating torque may be even greater.

(3) 能供給封閉閥門所需的密封力，強(qiáng)行閥門密封所必需的力，發(fā)生必需密封比壓是密封的首要條件。各種閥類如何核算下次有時機(jī)再談。

(3) The ability to provide the sealing force required to seal the valve, the force necessary to forcefully seal the valve, and the occurrence of the necessary sealing pressure is the primary condition for sealing. How to calculate various types of valves will be discussed next time when there is a chance.

(4) 證啟閉應(yīng)能保閥門所需求的行程

(4) The opening and closing of the valve should be able to ensure the required stroke of the valve

(5) 證啟閉應(yīng)能保閥門所需求的重復(fù)精度

(5) The opening and closing of the valve should be able to ensure the required repetitive accuracy of the valve

(6) 應(yīng)具有合適的操作速度

(6) Should have appropriate operating speed

(7) 應(yīng)裝備附設(shè)組織：手動操作、過載保護(hù)、開度指示、信號發(fā)送等。

(7) Additional organizations should be equipped: manual operation, overload protection, opening indication, signal transmission, etc.

2、 驅(qū)動設(shè)備對閥門的需求

2. The demand for valves in driving equipment

(1) 功能優(yōu)越的閥門應(yīng)該是體積小、重量輕、功能安穩(wěn)、作業(yè)牢靠、功率高、能耗低。

(1) Valves with superior functions should be small in size, light in weight, stable in function, reliable in operation, high in power, and low in energy consumption.

(2) 閥門構(gòu)造應(yīng)習(xí)慣驅(qū)動設(shè)備操作，更典型的問題是熱脹大影響，閥門封閉后，介質(zhì)溫度的改變使得閥體、閥桿、閥瓣發(fā)生脹大差，因?yàn)殚y桿和閥桿螺母是自鎖的，這個脹大差使得閥桿的軸向推力增大。軸向推力增大使得閥桿和閥桿螺母自鎖的更緊，甚至于呈現(xiàn)閥瓣咬死的狀況。一旦呈現(xiàn)這種狀況，驅(qū)動設(shè)備將無法翻開閥門。所以，閥門的構(gòu)造必定要防止呈現(xiàn)這種狀況。

(2) Valve construction should be accustomed to driving equipment operation, and the most typical problem is the influence of thermal expansion. After the valve is closed, the change in medium temperature causes a difference in expansion of the valve body, valve stem, and valve disc, because the valve stem and valve stem nut are self-locking, this difference in expansion increases the axial thrust of the valve stem. The increase in axial thrust makes the valve stem and valve stem nut self-locking tighter, even presenting a situation of valve disc seizure. Once this situation occurs, the driving device will not be able to open the valve. Therefore, the construction of the valve must prevent this situation from occurring.

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