5results about How to "Stable airflow" patented technology

This invention relates to a shock tube gas distribution method and system. During shock tube experimental gas preparation, a gas distribution column and a mixing tank are used in conjunction to actively control the internal pressure of the gas distribution column. An additional pressure-reducing stage is added between the gas cylinder and the mixing cylinder. The gas distribution column buffers large fluctuations in gas flow and pressure, resulting in a more stable gas flow and significantly improving the accuracy of the experimental gas component ratio. Simultaneously, the mixing tank has only one inlet connecting to the gas distribution column and one outlet connecting to the shock tube, improving the tank's strength and pressure-bearing capacity, and enhancing gas distribution safety.

This utility model relates to the field of blast furnace technology, specifically to a special tool for blocking blast furnace tuyeres and a pulverized coal injection (PCI) system. The special tool for blocking blast furnace tuyeres is used to inject a sodium silicate aqueous solution into a PCI system. The PCI system includes a PCI body and a coal conveying pipeline. A branch pipe is connected to the coal conveying pipeline, and a branch valve is installed on the branch pipe to control its on / off state. The special tool includes a purge pipe, a solution tank, and a connecting pipe connected in sequence. The end of the purge pipe away from the solution tank is connected to an air compressor, and the purge pipe is detachably connected to the solution tank. The special tool is connected to the coal conveying pipeline via the branch pipe. The sodium silicate aqueous solution is blown into the PCI body by the air compressor, mixes with the pulverized coal air from the coal conveying pipeline, and is then sprayed. This eliminates the problem of discontinuous air supply and effectively prevents the PCI clogging.

This utility model provides a polyester fabric drying device, including a support base plate, a fabric support roller, a first guide structure, a second guide structure, a drying structure, and a polyester fabric. The fabric support roller is fixedly installed at one end of the surface of the support base plate, and the first and second guide structures are fixedly installed on the surface of the support base plate. The drying structure is fixedly installed on the surface of the support base plate, located between the first and second guide structures. The polyester fabric is drawn out from the fabric support roller and fed into the first guide structure, the drying structure, and the second guide structure in one pass. The first guide structure and the drying structure of this utility model allow for pre-dehydration before drying, resulting in high drying efficiency and no damage to the fabric.

This invention relates to the technical field of welding equipment, specifically to a steel reinforcement welding device for cast-in-place box girder production, comprising a welding torch, a welding electrode feeding mechanism, and a wind shield. The welding electrode feeding mechanism is located at the front end of the welding torch. The welding electrode feeding mechanism is equipped with a sliding clamp to hold the welding electrode and feed it forward. The wind shield is located at the front end of the welding electrode feeding mechanism so that the end of the welding electrode is located inside the wind shield. The sliding clamp is connected to the power supply of the welding torch. After clamping the welding electrode, it moves the electrode. During welding, the welding electrode can be fed automatically, eliminating the need for manual feeding based on experience as in conventional welding, thus reducing welding difficulty. This also ensures that the end of the welding electrode always completes the arc discharge inside the wind shield, reducing the impact of wind on welding quality.

The utility model belongs to the field of powder spraying metallurgy technique, disclose a kind of RH furnace pressure circulation powder spraying system, by immersion type injection lime powder in RH riser, improve RH furnace desulfurization capacity, promote molten steel purity;Reduce raw material consumption, improve metallurgical effect.It include refining ladle, RH furnace body and powder spraying tank;RH furnace body is located above refining ladle;The side of RH furnace body is equipped with booster inlet, booster inlet is connected with booster pump by pipeline, and gas pressurization is passed to RH furnace body by booster inlet;The other side of RH furnace body is equipped with powder spraying port, and powder spraying port is connected with powder spraying tank and booster gas source respectively by pipeline;Powder of powder spraying tank is carried out powder spraying operation to the inside of RH furnace body by powder spraying port, and booster gas source is used to provide conveying power for powder.