31results about How to "Play a barrier effect" patented technology

The invention relates to a contact system with a high-voltage direct-current arc protection structure, comprising a ceramic seat, two static contacts, a movable contact and a transmission rod. The static contact is installed on the ceramic seat, and the movable contact is respectively in contact with the two static contacts. One end of the transmission rod is fixedly connected with the movable contact, and the other end is used for receiving power from the electromagnetic system and driving the movable contact to reciprocate linearly; The ceramic seat is provided with a protective structure for cutting off the connection of an arc sputtering object between two static contacts. The contact system of the invention can effectively prevent the connection of the electric arc sputtering objectsbetween the two static contacts by arranging a protective structure between the two static contacts on the ceramic base, increase the creepage distance, restrict the dielectric withstand voltage levelof the electric life index of the contactor to be improved, and accordingly improve the electric life of the contactor.

The invention discloses a deep foundation pit tower crane waterproof structure of weakly permeable soil and a construction method, and belongs to the technical field of tower crane foundation waterproof structures. The deep foundation pit tower crane waterproof structure comprises a foundation pit and a water collecting well, wherein the foundation pit comprises a foundation pit slot and a drainage groove, the foundation pit slot is located in the drainage groove, a concrete cushion is arranged on the bottom surface of the foundation pit slot, a brick membrane is arranged on the inner wall ofthe foundation pit slot, a waterproof layer I is arranged on the brick membrane, the top side of the waterproof layer I extends to the outer wall of the brick membrane, a concrete pressing plate is seamlessly connected to the waterproof layer I located on the top surface of the brick membrane, a tower crane base station to the interior of the drainage groove is arranged in an area between the concrete cushion and the waterproof layer I, a concrete foundation layer is arranged in the drainage groove, a waterproof layer II is arranged on the surfaces of the concrete foundation layer and the tower crane base station, the waterproof layer II is fixedly connected with the waterproof layer I located on the outer wall of the brick membrane, a drainage pipe which communicates with the water collecting well is arranged on the waterproof layer II, and a crushed stone layer is arranged above the drainage pipe. The deep foundation pit tower crane waterproof structure is a tower body protecting structure which has the advantages of simplicity, convenience, effectiveness, firmness, durability and long waterproof effect.

The invention discloses an automatic dough mixer and a dough mixing method, comprising a base, an outer cylinder is fixedly connected at the central position of the base, the outer cylinder has a cylindrical structure with one end open, a knob switch is arranged on the side of the base, and a side of the base is A locking piece is provided, an auxiliary arm is hinged above the base, a cylinder cover is fixedly connected to one end of the auxiliary arm, and the cylinder cover is matched with the opening of the outer cylinder. There is an inner cylinder, the shape of the inner cylinder is similar to the outer cylinder, the radius of the inner cylinder is smaller than the radius of the outer cylinder, the lower end of the outer side wall of the inner cylinder is provided with a lower hinge part, and the upper hinge part and the lower hinge part are connected by an elastic connecting rod, The automation of dough mixing is realized by designing a stirring assembly, and the vibration or shaking generated in the working process is slowed down by designing an elastic connecting rod between the walls of the outer cylinder and the inner cylinder.

The present application relates to the field of wafer cleaning equipment, in particular to a wafer rotational speed detection device. The wafer rotation speed detection device includes a seating cylinder and a driven shaft. An end cover of one end of the seating cylinder is provided with a mounting hole, and the driven shaft extends into the seating cylinder through the mounting hole, and passes through the first bearing. and the second bearing is rotatably connected with the seat cylinder. An air inlet is formed on the seat cylinder between the first bearing and the second bearing, a first flow channel is formed on the side wall of the driven shaft, and one end of the first flow channel is located between the first bearing and the second bearing, The other end of the first flow channel extends to the side wall of the driven shaft opposite to the inner wall of the installation hole of the seat cylinder, so that the gas entering the seat cylinder can flow to the installation hole through the first flow channel, and then the gas It is introduced into the brushing box through the gap between the installation hole and the driven shaft, so that the gas can play a barrier effect and prevent the cleaning liquid in the brushing box from leaking through the inner cavity of the seat cylinder.

The invention discloses a preparation method of a low reverse osmosis high-absorbency resin. In the polymerization process, a redox initiator is used, and a hydrophilic and hydrophobic composite cross-linking agent and a phase transfer catalyst are added. Alkali is added for neutralization during the polymerization and granulation processes, and a surfactant is added during the granulation process. The granulated gel is dried, pulverized, screened, and surface treated in sequence to obtain a low reverse osmosis high-absorbency resin. The anti-reverse osmosis ability of the low-reverse osmosis high-absorbency resin prepared by the invention is obviously improved, and the effect on improving the dryness and comfort of sanitary products is obvious.

The invention relates to the technical field of metal coatings, and discloses a production equipment for anti-skid and anti-vibration coatings, which includes a bottom plate, a support frame is fixedly connected to the top surface of the bottom plate, the top of the support frame is a semi-circular body, and the inner wall of the top surface of the support frame is socketed There is a material barrel, a chute is opened on the left top surface of the bottom plate, a slide plate is sleeved in the chute, and a rotating motor is fixedly connected to the side of the slide plate corresponding to the material barrel. Bearings, rotating bearings are fixedly connected with the transmission shaft of the rotating motor, one end of the rotating motor transmission shaft inside the barrel is fixedly connected with a stirring plate, the right side of the stirring plate is fixedly connected with two stirring rods, and the right side of the material barrel is fixedly connected And it is connected with the feeding cylinder A. Through the setting of the stirring rod, the raw materials are scraped from the bottom into the grinding cylinder in a layered manner, and the ground raw materials are spread on the upper layer to avoid mixing with the unground raw materials, so as to ensure Grinding range of raw materials and overall grinding effect.