English Translation

1. Adopting a Rotary Ring-Type Safety Door Structure

This design enables fully automatic opening and closing of the tank lid, ensuring smooth and collision-free operation when the extraction tank is opened or closed. The equipment supports high-temperature extraction, providing more options for extraction processes and adapting to special process requirements (e.g., introducing steam at a certain pressure for material fumigation). It features reliable safety performance with comprehensive safety protection functions: the tank lid cannot be opened when there is pressure inside the tank; the tank lid cannot be opened when there is residual liquid at the tank bottom; and the locking device will not operate if the tank lid is not fully closed. The redesigned sealing ring has a reasonable structure and long service life. Based on actual user application scenarios, the overall service life of the extraction tank can reach at least ten years, with no leakage at the tank bottom.

2. Double-Layer Bottom Filter Plate Structure

The bottom filter plate of the extraction tank adopts a double-layer design: the lower layer is a 5-6mm thick stainless steel plate with 10mm diameter circular holes, mainly serving a supporting function; the upper layer is a 0.6mm thick thin stainless steel plate densely covered with 0.5×10mm slotted holes—compared with ordinary circular holes, slotted holes are less prone to clogging. The upper steel plate is manufactured using a laser punching process, featuring a smooth surface that is easy to clean. A hinge structure is installed at approximately 1/4 of the two filter plates, allowing easy opening for inspection of the cavity under the filter plates and cleaning operations, ensuring thorough cleaning of the extraction tank. The tank bottom is also equipped with a solvent distribution space and flow guiding components, facilitating cyclic extraction and solvent transfer.

3. Sight Glass with Scraper Brush

To address the drawback of conventional multi-functional extraction tanks—where the top sight glass is small in size and easily contaminated during boiling extraction, making it difficult to clearly observe the extraction status inside the tank—our company has newly designed and equipped the top of the extraction tank with an integrated sight glass with a scraper brush or water spray function. This design not only provides better lighting effects but also a larger observation area.

4. High-Quality Flexible Hoses on the Bottom Tank Lid

The bottom tank lid of the extraction tank is equipped with high-quality flexible hoses, which offer advantages such as secure connection, no leakage, long service life, high temperature resistance (150℃), and maintenance-free operation. They require no replacement for at least five years and no maintenance during this period.

5. Cylinder-Driven Lid Opening and Closing Method

Two cylinders with sufficient pulling force are installed on the side of the extraction tank, and the opening and closing of the tank lid are performed by these two cylinders. The cylinders have a long stroke: when the lid opening button is pressed, the cylinders complete the entire stroke at a stable speed, driving the extraction tank lid to open slowly while herb residues gradually fall into the residue collection cart below the tank. In addition, when the lid opening button is released, the extraction tank lid stops opening immediately, ensuring good safety and flexible control over the falling speed and quantity of herb residues.