7results about How to "Avoid pressure rises" patented technology

The invention relates to the technical field of kilns, in particular to a kiln with heat insulation and energy conservation functions, which comprises a kiln body, a processing cavity is arranged in the kiln body, a pressure relief part is mounted on the upper side of the kiln body, a pressure relief cavity is arranged in the pressure relief part, and a pressure relief hole communicated with the processing cavity is formed in the lower cavity wall of the pressure relief cavity. A pressure relief plate used for sealing the pressure relief hole is arranged on the lower cavity wall of the pressure relief cavity, a first electric telescopic rod is installed in the pressure relief cavity, a pressure hole is formed in the end of the pressure relief cavity in the axial direction of the first electric telescopic rod, a pressure rod is slidably arranged in the pressure hole, and the upper end of the pressure rod is connected with the bottom of the pressure hole through a first spring in the pressure hole; the lower end of the pressure rod is connected with the upper side of the pressure relief plate; a first exhaust pipe is installed on the cavity wall of the pressure relief cavity, and an exhaust fan is installed in the first exhaust pipe. The problem that in the prior art, after machining of a kiln is completed, high-temperature gas is exhausted through a kiln opening, and people near the kiln opening are prone to being scalded at high temperature is solved.

The utility model discloses a safety valve structure of a gearbox of a backhoe loader. The safety valve structure comprises a box body, a valve cover, a spring, a valve core, a locking bolt and a spring washer, the box body is provided with an oil drainage hole, a main oil duct and two threaded holes, and the main oil duct is located between an oil outlet of the variable-speed oil pump and an oil inlet of the pressure regulating valve; the valve cover is provided with a valve core hole; one end of the valve core is embedded into the oil drainage hole, and the other end is sleeved on the valve core hole of the valve cover; the spring is sleeved on the valve core and is positioned in the valve cover; and the valve cover is fastened on the box body by two locking bolts and a spring washer through two threaded holes. The pressure regulating valve is simple and compact in structure, convenient and efficient to assemble and long in service life, and solves the problem that other parts are damaged due to clamping stagnation of the pressure regulating valve core caused by substandard cleanliness of hydraulic transmission oil in the prior art.

The utility model belongs to the technical field of glue supply equipment, disclose glue supply device. Glue supply device includes glue supply jar, glue supply pipeline, filter and glue supply pump, glue supply jar is used for storing glue, one end of glue supply pipeline communicates with the export of glue supply jar, the other end communicates with the import of filter, glue supply pump sets up on glue supply pipeline, glue supply pump is used for providing conveying power for glue, pressure regulating mechanism includes reflux pipeline and pressure control valve, one end of reflux pipeline communicates with the export of glue supply pump, the other end communicates with the import of glue supply pump, pressure control valve sets up on reflux pipeline, pressure control valve is used for opening when the pressure in glue supply pipeline reaches preset pressure threshold, to make the glue from the export of glue supply pump reflux to the import of glue supply pump through reflux pipeline, thereby avoid the problem of pressure rise caused by filter blockage, effectively reduce the load pressure of glue supply pump, prevent the damage of glue supply pump from overloading, prolong the service life of glue supply pump.

The invention provides an integrated liquid helium loading system which is integrated with a helium liquefier, a liquid helium distribution valve box, a liquid helium container, a helium pressurizing unit, a low-temperature helium rewarming unit, a gas containing and purifying unit and a liquid helium filling and transferring control unit. Through cooperation of the multi-channel composite low-temperature transmission pipeline and the liquid helium transmission pipeline, intelligent regulation and control of various working modes of gas purification, pre-cooling, liquid helium accumulated liquid filling and transfer injection loading of the loading system can be achieved, the transfer injection process of liquid helium to other multiple containers can be achieved while the liquid helium is filled, large loss and waste of the liquid helium cannot be caused, and the working efficiency of the loading system is improved. Potential safety hazards such as pressure rise of a container in the liquid helium transfer injection process can be avoided, so that safe and effective distribution and efficient transfer injection of the liquid helium are realized; and meanwhile, the low-temperature helium gas in the filling and transferring processes returns to the helium liquefier, so that the cold energy of the low-temperature helium gas in the filling and transferring processes can be effectively utilized.

The invention provides a method and device for preparing 5, 5 '-oxydimethylene-2-furfural, and belongs to the technical field of chemical synthesis. The method for preparing the 5, 5 '-oxydimethylene-2-furfural comprises the following steps: mixing 5-hydroxymethylfurfural, a catalyst and an organic solvent in a micro-mixer to obtain a mixture; the mixture is continuously conveyed into a dynamic tubular reactor to be subjected to a self-etherification reaction, a reaction solution containing 5, 5 '-oxydimethylene-2-furfural is obtained, and the inner diameter of the dynamic tubular reactor is 60-80 mm.

This utility model discloses a dust removal and cooling device for high-dust, high-concentration, ultra-high-temperature hydrogen gas, used for dust removal and cooling of the cracked gas produced by methane cracking for hydrogen production. It includes a dust collector and a cooling device. The dust collector comprises a gravity dust collection box and a water tank, with the gravity dust collection box nested within the water tank. The gravity dust collection box is used to deposit carbon powder in the cracked gas and has an ash hopper at its bottom. The water tank cools the gas entering the gravity dust collection box by supplying circulating water. The cooling device cools the cracked gas after dust removal by supplying circulating water. This dust removal and cooling device effectively solves the technical problems existing in the current methane cracking for hydrogen production process, such as difficulty in carbon-hydrogen separation under high dust, high concentration, and ultra-high temperature conditions, carbon powder blockage during hydrogen cooling, and difficulty in collecting carbon powder after high-temperature dust removal. The cracked gas undergoes subsequent cooling treatment only after a large amount of carbon powder is removed and after initial cooling and deceleration, which reduces the risk of blockage in the cooler.

The utility model discloses a pressure cooking utensil which comprises a pot body and a pot cover arranged on the pot body in a removable mode, a containing position used for containing the pot cover is arranged on one side of the pot body, the pot body is provided with a detection piece, the pot cover is provided with a trigger assembly, and the trigger assembly triggers the detection piece when the pot cover is opened and placed in the containing position. When the pot cover is placed in the containing position, the trigger assembly triggers the detection piece, so that the pressure cooking utensil obtains a signal that the pot cover is placed in a correct position, and the pressure cooking utensil can cook in a cover opening cooking mode. When the pot cover is not placed in the containing position, the detection piece has no signal, and the pressure cooking utensil cannot operate in the uncovering cooking mode. Meanwhile, when the pot cover is contained in the containing position, avoiding is formed on the pot opening, so that steam in the pot can be discharged smoothly, and the safety in the cover opening cooking process is guaranteed.