8results about How to "Lowered by" patented technology

The present invention provides a special optoelectronic composite cable for use in extremely cold weather, belonging to the technical field of optoelectronic composite cable preparation; it comprises a cable core, a water-blocking layer, a cold-resistant reinforcement layer, and a cold-resistant sheath layer. The present invention effectively prevents moisture intrusion through the water-blocking layer, the cold-resistant reinforcement layer provides additional mechanical strength, and the cold-resistant sheath layer fully protects the internal structure of the optoelectronic composite cable. This multi-level and multi-functional structural design enables the optoelectronic composite cable in extremely cold weather to better meet the complex use requirements in extremely cold environments, and provides a reliable solution for communications and energy transmission in cold areas.

The present invention relates to a high oxygen barrier single-component solvent-free polyurethane adhesive and a preparation method thereof. The raw materials include a polyol component, an isocyanate and a catalyst. The polyol component includes polybutadiene diol, polyether polyol, castor oil and fluorinated polyol. The mass ratio of polybutadiene diol, polyether polyol, castor oil and fluorinated polyol is 55-80:3-7:2-5:0.5-3. The single-component solvent-free polyurethane adhesive of the present invention uses polybutadiene diol as the main raw material of the polyol component in its specific formula, utilizes the lower free volume of the polybutadiene diol molecular chain, reduces the passage of oxygen and moisture, improves the barrier property of the polyurethane adhesive, and simultaneously cooperates with the use of fluorinated polyol to effectively increase the adhesion of the polyurethane adhesive on the surface of the substrate, so that the polyurethane adhesive of the present invention has a lower oxygen permeability and also has a higher peel strength.

The present invention discloses a method for manufacturing a centrifugal pump impeller structure, which includes a rear cover plate and at most two blades arranged on the rear cover plate, wherein the blades are arranged on the rear cover plate in a spiral shape, one end of the blades is placed in the middle of the rear cover plate area, and the other end of the blades extends to the edge of the rear cover plate. The present invention arranges at most two blades on the rear cover plate, and cooperates with the design of two key parameters, namely, the ratio of the relative velocity of the blade outlet to the relative velocity of the inlet, and the ratio of the axial velocity of the blade inlet to the velocity of the water suction chamber inlet, to avoid excessive deceleration or acceleration of the fluid inside the impeller structure, thereby significantly improving the operation efficiency and stability of the pump.

The present invention relates to the technical field of mortise and tenon structure plug-in doors, and proposes a mortise and tenon structure plug-in door that is easy to disassemble and assemble, comprising a door body, a plug-in door frame, an installation component and a limit plate, the plug-in door frame comprising a top frame and a side frame, the door body can be detachably arranged on the plug-in door frame through the installation component, the installation component comprises a rotating seat and a plug-in shaft, the rotating seat is slidably arranged on the plug-in door frame, the plug-in shaft is slidably arranged on the door body, a rotating groove matching the plug-in shaft is provided on the rotating seat, the plug-in shaft comprises a bottom shaft, a top shaft and a clamping block, the bottom shaft is slidably arranged on the door body, the top shaft and the bottom shaft can be spliced ​​into a cylindrical shaft, the bottom shaft and the top shaft are spliced ​​to form a clamping groove matching the clamping block, the limit plate is slidably arranged on the top shaft, and the door body is provided with a limit groove matching the limit plate. Through the above technical scheme, the problem that it is not convenient to quickly disassemble and reinstall the door in the prior art is solved.

The utility model discloses a leveling ironing machine for towel production. The leveling ironing machine comprises a base, an ironing box is installed at the top end of the base, an installation box is installed at the top end of the ironing box, a rotating mechanism is arranged in the installation box, and a drying assembly is arranged on one side of the top end of the ironing box; wherein the rotating mechanism comprises a suction pipe fixedly connected to one side of the top end of the mounting box, a filter screen is fixedly connected to one side of the top end of the mounting box, a rotating rod is rotationally connected between the filter screen and the interior of the mounting box, and fan blades are fixedly connected to the outer side wall of the rotating rod; the end, close to the filter screen, of the rotating rod is symmetrically and fixedly connected with scraping plates, and a motor is mounted at the top end of the mounting box, so that water vapor in the ironing box is sucked, water passing through the water vapor can be effectively reduced through the filter screen, the water content in air is greatly reduced, and the comfort degree of the working environment is improved.

The utility model relates to the technical field of liquid treatment, in particular to an efficient filtering liquid-liquid separation coalescence filter element which comprises an inner framework, a demulsification layer, a coalescence layer and an outer framework, a plurality of through holes are formed in the surfaces of the inner framework and the outer framework, an end cover is arranged on the top of the inner framework, and an interception layer for intercepting liquid garbage is arranged on the inner side of the inner framework. A first liquid discharging space is formed between the inner framework and the demulsification layer, and a first filtering layer and a first flow guide layer are placed in the first liquid discharging space; according to the oil-containing sewage treatment device, entering oil-containing sewage is preliminarily filtered through the intercepting layer, large-particle garbage impurities in the oil-containing sewage are intercepted and filtered, then the oil-containing sewage reaches the first filtering layer through the inner framework to be filtered, and the first filtering layer filters small solid particles passing through the intercepting layer, so that passing of the solid particles is reduced; follow-up demulsification layers and coalescence layers are prevented from being polluted, the risk that particulate matter blocks a flow guide groove in the first flow guide plate is reduced, and long-term efficient operation is maintained.

The utility model discloses a continuous feeding device of a pyrolysis recovery furnace, which is characterized in that a feed port and a discharge port are arranged on a buffer bin, nitrogen making devices and valve mechanisms are arranged on the feed port and the discharge port, the valve mechanisms are arranged on the outer sides of the nitrogen making devices, and the valve mechanisms and the nitrogen making devices are in signal connection with a PLC (Programmable Logic Controller); the PLC controls the nitrogen making devices and the valve mechanisms respectively, the valve mechanisms are controlled to be opened through the PLC, only one of the two valve mechanisms is opened, the interior of the pyrolyzing furnace is kept in a sealed state all the time, when the valve mechanisms are opened, the corresponding nitrogen making devices increase nitrogen injection to form a barrier layer, air passing is reduced, and when continuous feeding is conducted on the pyrolyzing recovery furnace, the nitrogen making devices and the valve mechanisms are separated from each other. And air entering the pyrolysis recovery furnace is reduced, and the feeding efficiency and safety are improved.

The application relates to a single crystal furnace, comprising: a crucible supporting rod; a supporting rod cover sleeved outside the lower end of the crucible supporting rod; wherein the lower end of the crucible supporting rod is provided with a first taper surface, the outer diameter of the first taper surface decreases from top to bottom in sequence, the upper end of the supporting rod cover is provided with a second taper surface, the inner diameter of the second taper surface decreases from top to bottom in sequence, and the first taper surface is arranged above the second taper surface in a spaced mode. The application can adjust the direction between the crucible supporting rod and the supporting rod cover from the existing vertical direction to the inclined direction, so that the probability of high-temperature silicon liquid passing through the gap between the crucible supporting rod and the supporting rod cover is reduced when the phenomenon of particle material splashing silicon and jumping silicon occurs, and then the problem that the corrugated pipe connected to the lower end of the supporting rod cover is scalded and causes the furnace body to leak and be smothered is improved.