3results about How to "Good operability" patented technology

This invention provides a powder conveying pipe chain system, including a tank truck unloading conveyor line, a ton bag feeding conveyor line, a rotary control valve, a feeding hopper, and an elevator pipe chain conveyor. The rotary control valve is connected between the tank truck feeding pipe and the feeding hopper. When the rotary control valve malfunctions, the ton bag feeding conveyor line can still operate normally, thereby maintaining continuous production. Therefore, this invention provides a pipe chain system that can achieve two feeding methods without interference, and its operability and stability are better than existing solutions.

This invention discloses a two-component self-healing polyurethane crack sealant based on dynamic disulfide bonds and its preparation method. The sealant comprises, by weight, component A containing 40-50 parts of polyol and 10-20 parts of diisocyanate, and component B containing 3-9 parts of a chain extender containing dynamic disulfide bonds, 0.5-3.5 parts of an auxiliary chain extender, 20-25 parts of filler, and 0.05-0.2 parts of catalyst; wherein the molecular weight of the polyol is 650-2000; the mass ratio of component A to component B is (1.5-2.5):1; and the catalyst is an organotin carboxylate catalyst. The sealant provided by this invention provides damage / repair functionality through the dynamic disulfide bond chain extender, while the auxiliary chain extender constructs stable hard segment crystals or hydrogen bond networks, providing initial strength and dimensional stability. These two components synergistically improve the self-healing properties and toughness of the prepared polyurethane crack sealant.

The invention relates to a wiper arm device having at least one channel connection unit (10) for interconnecting at least two wiping water channel sections, at least one channel holding unit (14) which can be arranged on at least one wiper arm (12) and at least one additional nozzle unit (16), the channel holding unit being provided for holding at least the channel connection unit (10) on the wiper arm (12). Furthermore, it is proposed that the wiper arm device has a connection unit (18) which is provided for connecting the at least one additional nozzle unit (16) to the channel connection unit (10), in particular non-destructively and releasably.