Removal of the floating head side of a floating head heat exchanger

The general steps for disassembling the floating head side of a floating head heat exchanger are as follows: 1. Seal the heat exchanger to prevent dust and contaminants from entering. 2. Drain the fluid from the heat exchanger by opening the drain valve until all of the fluid has been removed. 3. Use a tool to remove the bolts on the floating head cover. 4. The cover plate and floating head slide out of the tube bundle. 5. Clean and inspect the tube bundle, and perform necessary cleaning of the tube bottoms. 6. Disassemble the floating head and clean the tube sheet and floating head. 7. Inspect the disassembled components. Open each expansion joint to check for any damage. Check the pipes for wear or scaling. Please note that during the disassembly process, it is essential to ensure personal safety and avoid injuries caused by improper operations or a lack of safety measures. At the same time, ensure a clean working environment to maintain the proper operation of the equipment. .

I don’t understand: 1. What are those several small components that are evenly distributed inside the cover? 2. To which components are those hooks connected? What is the purpose of that sealing plate, and what does that small partition mean?