100results about How to "Guaranteed leak" patented technology

The invention provides an inductive automatic opening and closing large fixed umbrella which comprises a base, a middle rod, a rainwater collection tray, four ribs and an umbrella cloth. The middle rod is vertically connected at the upper end of the base, the rainwater collection tray is connected at the upper end of the middle rod in a penetrating manner, the four ribs are peripherally hinged tothe side wall of the upper end of the middle rod, the same umbrella cloth covers the upper ends of the four ribs, the lower end of the base is fixedly connected with an opening and closing device which is fixedly inserted into the ground, strip sliding slots are formed in the lower ends of the ribs, sliders are slidably connected into the strip sliding slots, and the lower ends of the sliders arehinged to the upper end of the opening and closing device. The inductive automatic opening and closing large fixed umbrella overcomes the shortcomings of the prior art and is reasonable in design andcompact in structure, the umbrella automatically induces rain and automatically opens in rainy days, manual supporting and opening of staff are omitted, and practicability is greatly improved. Besides, after the rain stops, the umbrella automatically closes, occupied area is decreased, and the service life of the large fixed umbrella is effectively prolonged.

A multi-purpose foldable changing room is characterized by being composed of an extension type foldable supporting mechanism and external double-layer thickened oxford pongee fabric, the extension type foldable supporting mechanism is composed of a top framework net and a foldable supporting mechanism below the top framework net, the top framework net is composed of three octagonal foldable frameworks arranged in a radial pattern, the foldable supporting mechanism is composed of foldable supporting rods, folding devices are arranged at the positions where the lower portions of the foldable supporting rods intersect, and buttons are arranged on the folding devices, so that unfolding and folding of the foldable rods are facilitated; a plurality of sets of telescopic rods are arranged below the folding devices and can be pulled out conveniently in use to a height required by people; meanwhile, a hanging device is arranged on the top of the extension type foldable supporting mechanism so that the changing room can be hung conveniently if there is room for hanging and directly supported by the three sets of telescopic rods below otherwise; through the arrangement of the outer double-layer fabric, people can get changed inside; furthermore, the whole changing room can be folded, privacy of different people can be protected on different occasions, and the changing room has the advantages of being light, convenient to use, easy to operate and the like.

The invention discloses a dynamic sealing gas gate valve which comprises a valve body, a gate valve plate and a cylinder, wherein both sides of the gate valve plate of the valve body are provided with sealing boxes of the gate valve plate; the sealing boxes are provided with electric connecting pressure gauges; and the valve body is provided with a mobile sealing ring and a guidance device of thegate valve plate. The invention has the advantages that: when the valve is closed, the mobile sealing ring is pressed tightly on the valve plate due to the action of oil pressure in order to ensure tight sealing between the valve plate and the valve body and leakage; when the valve needs opening, a gas cylinder relieves pressure, hydraulic oil refluxes; the mobile sealing ring is depressurized, the valve plate is easily opened for realizing dynamic sealing of the valve; both sides of the gate valve plate of the valve body are provided with the sealing boxes which ensure that only a small quantity of gas leaks in the sealing boxes rather than outside the valve body in the processes of opening and closing the gate valve plate; moreover, the sealing boxes are provided with the electric connecting pressure gauges for detecting gas leakage, executing early warning and ensuring system safety; and the valve body is provided with the guidance device of the gate valve plate for ensuring that the gate valve plate is flexibly opened and closed without blockage.