37results about How to "Reliable loading and unloading" patented technology

The invention relates to a device and a method for filling and unloading liquid ammonia. The device comprises a liquid ammonia buffer storage tank, a liquid ammonia filling and unloading arm and a delivery pump, and is characterized in that the liquid ammonia buffer storage tank is connected with the delivery pump; the delivery pump is connected with a liquid phase main pipeline; an outlet of the delivery pump is further provided with a backflow pipeline; a backflow regulating valve is arranged on the backflow pipeline; the liquid phase main pipeline passes through a rapid cut-off valve, a flame arrester, a mass flowmeter, a regulating valve of the mass flowmeter, a manual ball valve and the liquid ammonia filling and unloading arm on a liquid ammonia pipeline in sequence; the mass flowmeter and the regulating valve of the mass flowmeter are connected with a filling and unloading quantitative control system; a tank car is further connected with a gas phase filling and unloading arm; the gas phase filling and unloading arm is connected with a gas phase main pipeline or a compressor via a pipeline provided with a pressure meter, a flame arrester and a pneumatic regulating valve in sequence; the gas phase filling and unloading arm is then connected with an ammonia buffer storage tank; and the liquid phase main pipeline is further connected with the gas phase main pipeline via a safety valve. The device and the method can be applied to the field of filling and unloading various easily liquified liquid such as liquid ammonia, dimethyl ether and natural gas.

The invention discloses a bobbin fixing device. The bobbin fixing device comprises a rotating shaft, a first expansion block, a guide block, expansion pieces, ring springs, a second expansion block and a tightening nut. One end of the rotating shaft is provided with a step surface, and the other end of the rotating shaft is provided with a threaded section. The tightening nut is screwed on the threaded section. Both the first expansion block and the second expansion block are of a hollow cone frustum with a conical surface. The first expansion block is sleeved on the rotating shaft, and one end of the first expansion block is abutted against the step surface of the rotating shaft. The second expansion block is sleeved on the rotating shaft, and one end of the second expansion block is abutted against the tightening nut. The guide block is arranged between the first expansion block and the second expansion block, and at least three grooves are formed in the guide block, wherein the grooves extend along the rotating shaft axially and are evenly distributed along the rotating shaft circumferentially. The expansion pieces are plate-like rectangular solids, at least three in number and respectively embedded in the grooves of the guide block in a sliding and matched mode, the bottom ends of two sides of each expansion piece are respectively abutted against the conical surfaces of the first expansion block and the second expansion block, through holes are formed in the expansion pieces, and the ring springs penetrate through the through holes to connect the expansion pieces together. By means of the bobbin fixing device, a bobbin does not slip in the process of backing-off, and the bobbin fixing device can be adapted to large bobbins with high speeds and inclination angles.