覆蓋層的選擇包括覆蓋材料、表面形態(tài)和厚度。

The selection of covering layer includes covering material, surface morphology and thickness.

覆蓋層的主要成分是各種橡膠和塑料，在大多數(shù)氣候情況下，橡膠能在傾角不大于18°的條件下正常工作，而PVC膠帶正常運(yùn)行的傾角在12°以下。PVC不如橡膠的回彈性好，但有較好的阻燃性、卸料性和清洗性。各種橡膠的性能差別也很大，如天然橡膠、丁苯橡膠有很好的吸能與抗磨性；乙丙橡膠特別耐熱；丁氰橡膠的耐油性好；丙丁基橡膠既耐熱又耐氧化化學(xué)作用。所以，選擇何種類型型號(hào)的覆蓋材料，必須根據(jù)輸送物料的種類、運(yùn)行條件和工作環(huán)境來(lái)綜合考慮。

The main components of covering layer are all kinds of rubber and plastics. In most climate conditions, rubber can work normally under the condition of inclination angle no more than 18 ° while PVC tape can operate normally under 12 ° angle. The resilience of PVC is not as good as that of rubber, but it has better flame retardancy, discharge property and cleaning property. The properties of various rubbers are also very different. For example, natural rubber and styrene butadiene rubber have good energy absorption and wear resistance; ethylene propylene rubber is particularly heat-resistant; nitrile butadiene rubber has good oil resistance; and propylene butyl rubber is both heat-resistant and oxidation resistant. Therefore, the selection of covering materials must be based on the types of materials, operating conditions and working environment.

覆蓋層厚度的增加有利于提高輸送帶的耐沖擊與抗磨性能。特別是當(dāng)今棉帆布帶芯已被合成纖維織物帶芯取代。帶芯的性能已大大提高，而厚度相對(duì)減薄，為使輸送帶的整體性能提高，有必要相應(yīng)地提高覆蓋層厚度，以充分發(fā)揮其優(yōu)點(diǎn)，提高輸送帶的使用壽命。但是下覆蓋層過(guò)厚使輸送帶的運(yùn)行阻力變大。

The increase of covering layer thickness is beneficial to improve the impact resistance and wear resistance of conveyor belt. In particular, the core of cotton canvas has been replaced by synthetic fiber fabric. The performance of the belt core has been greatly improved, but the thickness is relatively thin. In order to improve the overall performance of the conveyor belt, it is necessary to increase the thickness of the covering layer to give full play to its advantages and prolong the service life of the conveyor belt. But the lower covering layer is too thick, which makes the running resistance of the conveyor belt increase.

設(shè)計(jì)覆蓋層厚度的依據(jù)是磨損速度、受料條件、覆蓋層的耐熱性、抗沖擊以及輸送帶的運(yùn)轉(zhuǎn)周期。表1是通常覆蓋層厚度的取值。

The thickness of covering layer is designed on the basis of wear rate, material receiving condition, heat resistance, impact resistance and running period of conveyor belt. Table 1 shows the values of common overburden thickness.

表1 覆蓋層的取值（mm）

Table 1 values of overburden layer (mm)

輸送帶的接頭

Joint of conveyor belt

輸送帶的接頭型式，應(yīng)根據(jù)輸送帶類型和帶式輸送機(jī)的特性進(jìn)行選擇：

The joint type of conveyor belt shall be selected according to the type of conveyor belt and the characteristics of belt conveyor

鋼絲繩芯輸送帶應(yīng)采用硫化接頭；

Vulcanized joint shall be used for steel cord conveyor belt;

多層織物芯輸送帶宜采用硫化接頭；

Vulcanized joint should be used for multi-layer fabric core conveyor belt;

織物整芯輸送帶宜采用膠粘接頭，也可采用機(jī)械接頭。

The adhesive joint or mechanical joint should be used for the whole fabric conveyor belt.

輸送帶硫化接頭的形式：分層織物芯輸送帶宜采用階梯接頭；鋼絲繩芯輸送帶可根據(jù)拉伸強(qiáng)度等級(jí)采用一級(jí)或多級(jí)硫化接頭。

The form of vulcanization joint of conveyor belt: the ladder joint should be used for layered fabric core conveyor belt; the one-stage or multi-stage vulcanization joint can be used for steel cord conveyor belt according to the tensile strength grade.

輸送帶的系數(shù)

Safety factor of conveyor belt

應(yīng)根據(jù)不同條件選擇輸送帶的系數(shù)：即一般帶式輸送機(jī)，鋼絲繩芯輸送帶的系數(shù)可為7-9；當(dāng)對(duì)輸送機(jī)采取可控軟啟動(dòng)、制動(dòng)措施時(shí)，可取5-7。

The safety factor of conveyor belt should be selected according to different conditions: for general belt conveyor, the safety factor of steel cord conveyor belt can be 7-9; when the controllable soft start and braking measures are taken for the conveyor, 5-7 can be taken.

通過(guò)正確選擇帶式輸送機(jī)的輸送帶，不僅可以保證帶式輸送機(jī)設(shè)備的運(yùn)行穩(wěn)定，還可以可大大降低帶式輸送機(jī)行業(yè)在輸送機(jī)設(shè)備的投資費(fèi)用。

Belt conveyor not only can reduce the cost of belt conveyor equipment, but also can ensure the stability of equipment in the industry.

切菜機(jī)輸送帶告訴大家輸送帶覆蓋層的種類選擇！大家在購(gòu)買(mǎi)的過(guò)程中一定要根據(jù)自我的需求來(lái)考量！

Vegetable cutter conveyor belt to tell you the type of conveyor belt cover selection! Everyone in the purchase process must be based on their own needs to consider!