化工行业使用的防爆型缠绕膜包装机是专门设计用于存在易燃易爆物质环境中的包装设备，以确保生产安全。这类机器的特点和功能包括：

1. 防爆设计

：符合国际防爆标准，如Exde II BT4等级，能在有爆炸风险的环境中作业，预防静电积聚和火花产生，适用于化工、炭黑、耐火材料、涂料等行业。

2. 预拉伸膜架系统

：能够预拉伸薄膜达250%，减少薄膜使用量，同时自动送膜，提高包装效率。

3. 升降立柱双链条结构

：保证升降过程稳定，适应不同高度的货物包装需求。

4. 直流调速系统

：使得转盘启动、加速及运转控制更加精准，包装过程更稳定。

5. 开门膜架设计

：便于快速更换和穿膜操作。

6. 压顶装置

：针对较高且堆叠不稳定的货物，能有效固定产品，防止包装过程中倒塌。

7. 斜坡辅助

：方便手推车直接上下货物，提升操作便利性。

8. 自动上断膜功能

：提高包装连续性和工作效率，减少人工干预。

9. PLC控制系统

：提供智能化操作，可根据不同包装需求进行编程设定，实现自动化包装流程。

10. 适用范围广

：不仅限于化工行业，还适用于制罐、空瓶等易倒塌产品的包装，以及面粉等粉尘易爆环境的包装需求。

综上所述，防爆型缠绕膜包装机集成了安全、高效、智能化等特点，是化工及其他易爆环境下不可或缺的包装解决方案。

The explosion-proof stretch film packaging machine used in the chemical industry is specially designed for packaging equipment in the presence of flammable and explosive substances to ensure production safety. Features and functions of this type of machine include:

1. Explosion-proof design

: In line with international explosion-proof standards, such as Exde II BT4 class, it can operate in an environment with a risk of explosion, prevent static electricity accumulation and sparks, and is suitable for chemical, carbon black, refractory, coating and other industries.

2. Pre-stretch film frame system

: It can pre-stretch the film up to 250%, reduce the amount of film used, and automatically feed the film to improve the packaging efficiency.

3. Lifting column double chain structure

: Ensure the stability of the lifting process and adapt to the packaging needs of goods of different heights.

4. DC speed regulation system

: It makes the turntable start, acceleration and operation control more accurate, and the packaging process more stable.

5. Door opening film frame design

: Easy to quickly change and pass through the film.

6. Pressing device

: For tall and unstable stacking goods, it can effectively fix the product and prevent it from collapsing during the packaging process.

7. Slope Assist

: It is convenient for the trolley to directly load and unload the goods, improving the convenience of operation.

8. Automatic film disconnection function

: Improve packaging continuity and work efficiency, and reduce manual intervention.

9. PLC control system

: Provide intelligent operation, which can be programmed according to different packaging needs to realize the automatic packaging process.

10. Wide range of applications

: It is not limited to the chemical industry, but also applies to the packaging of products that are prone to collapse such as cans and empty bottles, as well as the packaging needs of dusty and explosive environments such as flour.

To sum up, the explosion-proof stretch film packaging machine integrates the characteristics of safety, efficiency and intelligence, and is an indispensable packaging solution in chemical and other explosive environments.