5results about How to "Prevent bringing in" patented technology

The utility model belongs to the technical field of plasma rotating electrode powder manufacturing equipment, and relates to a vacuum dynamic sealing structure of a plasma gun for powder manufacturing, which comprises an external powder blocking module and a dynamic sealing module, the external powder blocking module consists of a first powder blocking plate, a powder blocking ring and an insulating powder blocking plate, the first powder blocking plate is fixed at the top of a plasma gun body to form an arc-shaped shielding surface, and the dynamic sealing module is fixed at the top of the plasma gun body. The powder retaining ring coaxially sleeves the positive electrode of the plasma gun body and forms an annular gap type powder blocking structure with the insulating powder retaining plate; the dynamic sealing module is sequentially provided with a dynamic sealing installation metal cylinder, an insulating cylinder and a sealing assembly from outside to inside in the radial direction of the plasma gun body, the insulating cylinder and the dynamic sealing installation metal cylinder form a step-shaped sealing structure, and vacuum sealing and electrical isolation are achieved between the dynamic sealing module and the external powder blocking module through bakelite and an O-shaped sealing ring. The vacuum dynamic sealing structure provided by the utility model has the advantages of powder isolation, reliable sealing, no burning loss short circuit and no need of vacuum grease auxiliary sealing lubrication.

The application provides a three-phase separator and relates to the technical field of petroleum processing. The three-phase separator comprises a first shell, a second shell and a bubble breaking device; the first shell is accommodated in the second shell, the second shell comprises a feeding port, a discharging port and a gas outlet, both ends of the first shell are open, and the bubble breaking device is arranged at one end of the first shell away from the feeding port; the bubble breaking device comprises a cover body, one end of the cover body is open, a plurality of air holes are arranged in the cover body, the inner wall of the air hole is provided with a thorn, and the open end of the cover body faces the first shell. The three-phase separator provided by the application can sufficiently remove bubbles in fluid, prevent bubbles from bringing catalyst into hydrogenated oil, break large-diameter bubbles, avoid fine catalyst powder from being taken out by gas phase, and influence the stable operation of the device.

The utility model discloses a kind of drying machines for ceramic production, including drying cabinet and the fixed disc for bearing ceramic, the lower end of the fixed disc is engagedly connected with driving disc, and driving disc drives fixed disc to rotate slowly in drying cabinet, the fixed disc is equally angularly provided with connecting groove, and the left and right sides of fixed disc are slidably connected with connecting plate, the bottom of the fixed disc is rotatably provided with ball bearing, while ball bearing is attached to the bottom of the inside of drying cabinet, the rear end of the drying cabinet is fixedly connected with wind cover, and the rear end of wind cover is engagedly installed with dust screen. The drying machine for ceramic production, driving disc drives fixed disc to rotate in drying cabinet, so that ceramic is in full contact with hot air, to achieve more sufficient drying effect, hot air is contacted with the bottom of ceramic through connecting groove, to further improve the uniformity of drying, and fixed disc is removed from drying cabinet by connecting plate, to facilitate ceramic to be taken and placed.

The utility model discloses a cut big and medium -sized casting with wet dust removal device belongs to dust purification field. Including frame main part, antechamber drive double speed reducer, fire -retardant fire -resistant cloth, explosion -proof lighting warning light, walking track and supporting parts, controlling means, dust fog filter, off -wind machine, flue gas exhaust pipe. The water in equipment water tank is promoted to form circulating water curtain with the negative pressure of off -wind machine. The air containing smoke dust is first impacted with water curtain under the action of certain airflow organization, and part of the viscosity material in it is intercepted in water. Then pass through water screen and enter the air -water channel, and the water in the channel produces strong stirring and mixes, and the particulate matter is completely cleaned to water. After a part of water follows airflow organization and enters the gas collecting box, air -water separates, and the treated gas passes through the water baffle and is discharged to the atmosphere through the off -wind machine, and the separated water flows into the overflow tank after gathering in the gas collecting box, and overflows from the overflow tank to the water flooding board to form a water curtain, and the cycle is repeated, and the smoke dust is removed.

This utility model discloses a liftable Class C liquid warehouse cofferdam device, aiming to solve the problem of existing reinforced concrete cofferdams being elevated above the ground, severely affecting the convenience of vehicle transportation within the warehouse. The utility model includes a cofferdam plate and an elastic waterproof membrane. An installation groove is provided on the warehouse floor, and the cofferdam plate is liftable and installable in the groove. The waterproof membrane is connected to both sides of the groove, covering the opening of the groove. When the cofferdam plate is raised above the ground, the waterproof membrane adheres to the upper outer wall of the cofferdam plate. When the cofferdam plate is lowered to be flush with the ground, the waterproof membrane is laid flat on the upper part of the cofferdam plate. This liftable Class C liquid warehouse cofferdam device, as disclosed in this patent application, not only meets the requirements for preventing material leakage but also facilitates vehicle passage during material transportation.