42results about How to "Achieve leak" patented technology

The invention relates to a pipeline reconstruction sealing protective cover structure. The pipeline reconstruction sealing protective cover structure is characterized in that the pipeline reconstruction sealing protective cover structure is arranged at the fracture position of a single pipeline or the joint of a plurality of pipelines; and the pipeline reconstruction sealing protective cover structure comprises at least two shell structures, and the two shell structures include the pipeline reconstruction sealing protective cover upper shell and the pipeline reconstruction sealing protective cover lower shell. According to the pipeline reconstruction sealing protective cover structure, the outer sides of the pipelines are wrapped by a pipeline reconstruction sealing protective cover at thejoint of the pipelines; even if the pipelines are in a leaking state, leakage stopping can be completed without power failure and shutdown; pressure relief holes are formed in the shells, the pressure relief holes are opened in the leakage stopping process and blocked after blocking glue is solidified, and leakage stopping under the pressure state can be achieved; and besides, the blocking glue is only arranged at the joint gap of the shells, and bolts are not sealed, so that the blocking glue is convenient to remove in the later period, and the reconstruction sealing protective cover is convenient to reuse.

The invention relates to a leakage preventive hydrogen tank for a hydrogen-powered automobile, belongs to the technical field of new energy automobiles, and aims at solving the problem that a hydrogentank of a hydrogen-powered automobile in the prior art possibly leaks during use and potential risk is caused. The leakage preventive hydrogen tank for the hydrogen-powered automobile comprises an inner layer of the hydrogen tank, an outer layer of the hydrogen tank, a solid hydrogen storing material which is arranged between the inner layer of the hydrogen tank and the outer layer of the hydrogen tank, a hydrogen leakage detecting device and a data receiving and handling system, wherein the hydrogen leakage detecting device is used for detecting whether hydrogen leaks between the inner layerof the hydrogen tank and the outer layer of the hydrogen tank; and the solid hydrogen storing material is used for absorbing the possibly leaked hydrogen. With the adoption of the leakage preventivehydrogen tank for the hydrogen-powered automobile, the technical effects of detecting hydrogen leakage and preventing hydrogen from leaking into air can be achieved; the shortages in the prior art aresolved; and the leakage preventive hydrogen tank for the hydrogen-powered automobile has outstanding substantive characteristics and obvious progress.

The invention discloses a continuous gutta-percha freezing-out device which comprises a freezing-out bucket with a freezing water inlet pipe, wherein the freezing water inlet pipe is connected with a plurality of heat exchange pipes with baffles and penetrates out of the freezing-out bucket through a freezing water return pipe, the heat exchange pipes are provided with fins and are vertically arranged, and a freezing water pipe is connected with a water hammer vibration exciter; the freezing-out bucket is provided with a to-be-frozen-out liquid inlet and an overflow reflux pipe; a spiral conveyer is arranged on one side of the bottom of the freezing-out bucket; an inverted conical structure is arranged on the other side of the freezing-out bucket and penetrates through a solid-liquid separation bucket through an axial-flow pump to be connected with a sieve mesh bucket; a bottom outlet of the sieve mesh bucket is connected with a spiral juicer; both the sieve mesh bucket and the spiral juicer are arranged in the solid-liquid separation bucket, and the solid-liquid separation bucket is connected with the freezing-out bucket. According to the device, the technical difficulties of low heat transfer coefficient and non continuous production in a gutta-percha freezing-out process are overcome. The device is reasonable in design, safe and reliable, relatively low in cost and convenient for large-scale industrialized production.

The invention discloses a container spreader, which comprises an opening and closing device for controlling the door of a container to be opened or closed. The opening and closing device is provided with a rotating arm and a driving device for driving the rotating arm to rotate. When the container is hoisted, the rotating arm is driven by the driving device to a position for pushing against the door of the container to be in a closed state; when the container is discharged, the rotating arm is driven by the driving device to rotate so as to be convenient for opening the door of the container. According to the container spreader disclosed by the invention, as the rotating arm which is driven by the driving device to rotate is arranged, the door of the container can be ensured to be in the closed state all the time in the hoisting process because the rotating arm pushes against the door of the container, thereby, the zero leakage of cargoes when the container is hoisted is simply and conveniently realized without other auxiliary tools. Moreover, when the container is discharged, the rotating arm is driven by the driving device to other positions, and thus, the limitation on the rotation of the door of the container can be removed, and the door of the container is opened so as to facilitate discharging, and the operation is simpler. The invention also discloses a reach stacker.

The invention discloses a preparation method for a bismuth titanate film layer on the basis of micro-arc oxidation technology. The preparation method comprises the following steps: a bismuth sheet and a platinum sheet which are the same in size are respectively used as an anode and a cathode; the bismuth sheet is burnished with several pieces of sand paper with different meshes and polished with a polishing paste, and the cleaning and oil removal of the bismuth sheet are performed sequentially via alcohol and acetone for standby; electrolyte with titanium concentration of 0.01-0.10 mol / L is prepared; the bismuth sheet keeps a distance of 1-3 cm from the platinum sheet, the bismuth sheet and the platinum sheet are vertically immersed into the electrolyte in a depth of 2-4 cm, magnetic agitation is started, and 1-5A constant current is electrified for 5-10 min; electric sparks are continuously generated on the surface of the bismuth sheet, a deposition layer is synchronously generated, and the bismuth sheet with the deposition layer is flushed with ion water and then dried at a temperature of 60 DEG C for 2 h, as a result, a bismuth titanate film layer is obtained. The bismuth titanate film layer preparation method is mild in synthesis conditions, can be completed under the conditions of normal temperature and normal pressure, and is quick in reaction speed and simple in operation steps; used bismuth is an environmental-friendly raw material, the process is safe, and no hazardous substance is leaked and discharged, so that environmental protection is facilitated.

The invention relates to the field of gaskets, in particular to a circumferential sealing gasket and a production process thereof. The circumferential sealing gasket comprises a body. Bonding glue is coated at the position of an inner hole of the body evenly to form a glue layer. The circumferential sealing gasket has the advantages of being oil-resistant, pressure-resistant, low in leaking rate, good in sealing performance, good in compensation performance, good in machinability, low in cost and the like. The glue layer is first in contact with the upper face and the lower face of a flange, face pressure between flanges can be increased, the strength of the gasket itself can be improved by coating silica gel on the inner hole of the gasket, and the inner hole is prevented from leaking. An advanced mature manufacturing technology can be adopted in the process to achieve batch production, labor force is reduced, and working efficiency is improved. Consumed bonding agent is reduced, and cost is saved.

The invention discloses an automatic-batching mixing granulation system. The automatic-batching mixing granulation system comprises a vacuum loading machine, a buffer storage bin, a metering unit, a metering bin, a mixing granulator and a controller. According to the automatic-batching mixing granulation system, the loading, metering, mixing and granulation operations are organically integrated, so that the seamless joint of all procedures is realized, the operation procedure is simplified, the dust pollution is avoided, and the labor intensity of operators is reduced; and furthermore, the operators do not need to specifically meter the materials, and the mixing granulation and the loading are synchronously carried out, so that the granulation period is shortened, and the production efficiency is improved.

The invention relates to the technical field of engineering machinery, and discloses a load-sensitive hydraulic system, a power matching control method, device and system and an engineering machine. The load-sensitive hydraulic system, the power matching control method, device and system and the engineering machine are used for improving the control conformance, the dynamic responsiveness and the stability of the load-sensitive hydraulic system and the control performance of power matching. The load-sensitive hydraulic system comprises a variable pump assembly, a main control valve set, an actuator, an overflow valve and a flow control valve set. An oil inlet of the main control valve set is communicated with an oil outlet of the variable pump assembly, and a load-sensitive feedback oil path is arranged between a control oil port of the main control valve set and a control oil port of the variable pump assembly. Two oil ports of the actuator are communicated with two working oil ports of the main control valve set respectively. An inlet oil path of the overflow valve is communicated with the load-sensitive feedback oil path, and a switch valve is arranged on the inlet oil path of the overflow valve. An inlet oil path of the flow control valve is communicated with the load-sensitive feedback oil path, and the flow control valve comprises a proportional throttle valve and a first pressure-compensated valve arranged on an inlet oil path of the proportional throttle valve.

The invention relates to a coupling actuator comprising a master cylinder, a hydraulic line and a slave cylinder, for actuating a coupling. The invention also relates to a method for detecting a leakage on a coupling actuator comprising the following steps: a parameter of the coupling actuator is determined, the parameter is compared to a predetermined threshold value, if the parameter exceeds the threshold value, a warning of a leakage is provided, and the warning is communicated.

The invention discloses an oil mist sealing structure of a hydraulic generator and belongs to the field of power generation equipment. The oil mist sealing structure is composed of a zero-clearance sealing part and a magnetic liquid sealing part, achieves rotary combined seal and is applicable to bearing oil mist seal of the hydraulic generator from the low speed to the high speed. A sealing shell of a combined sealing device is formed by connecting four bearing sealing covers through bolts. Firstly, four sealing split bodies are installed on the lower portions of the bearing sealing covers, composite flexible materials are adopted in the circumferential direction to connect the four sealing split bodies, zero-clearance sealing is formed under the radial and axial thrust effect of a small spring, and bearing oil mist is well sealed; then, by means of the magnetic liquid seal on the upper portions of the bearing sealing covers, the zero-leakage sealing effect is achieved; by combining the two kinds of seal, air pressure of a sealing cavity formed by the upper seal and the lower seal can be effectively kept, no negative pressure is produced in the cavity, overflow caused by the pressure difference between the high internal pressure and low bearing sealing cover external pressure can be effectively prevented, and the service life of the oil mist seal is prolonged.