2results about How to "Act as a limit guide" patented technology

The utility model discloses a valve device and gas water heater relates to water heater technical field. Among them, valve device includes valve body, fixed cover subassembly and valve core subassembly, and valve body is equipped with valve cavity and with valve cavity communication's water inlet channel, first water outlet channel, second water outlet channel and mounting port, and first water outlet channel has with valve cavity communication's first water pass -through, and second water outlet channel has with valve cavity communication's second water pass -through, valve body is equipped with with mounting port connection's first guide structure in the inner wall surface of valve cavity, fixed cover subassembly is installed in valve cavity through mounting port, and the outer wall surface of fixed cover subassembly is equipped with second guide structure, and second guide structure is limited with first guide structure and cooperates, valve core subassembly is installed in fixed cover subassembly, and can rotate in valve cavity to adjust the water flow of first water pass -through and second water pass -through. The utility model technical scheme can prevent fixed cover subassembly and valve body assembly deviation, guarantee valve device's assembly quality, promote assembly efficiency.

The utility model discloses a standard dilution device for gas analysis, which comprises a dilution cylinder with an opening at the upper end, a piston is slidably mounted in the dilution cylinder in a sealed manner and connected with a piston rod, the piston rod extends out of the opening at the upper end of the dilution cylinder, and a gas outlet pipe orifice is arranged at the bottom of the dilution cylinder. A first air suction pipe opening and a second air suction pipe opening are symmetrically formed in the side wall of the lower end of the dilution cylinder, the inner diameter of the first air suction pipe opening is unequal to that of the second air suction pipe opening, an observation window is formed in the dilution cylinder, and scale marks for displaying the position of the piston are arranged on the observation window. A first air suction control valve and a second air suction control valve are detachably installed on the first air suction pipe opening and the second air suction pipe opening respectively, an air outlet control valve is detachably connected to the air outlet pipe opening, and a limiting adjusting structure for adjusting the movement limit position of the piston is further arranged at the opening of the upper end of the dilution barrel. The standard dilution device can quickly and accurately dilute the sampled gas, and is simpler to operate.