11results about How to "Close distance" patented technology

This invention provides a wafer carrier device and a wafer cleaning apparatus using the wafer carrier device. The wafer carrier device includes a carrier disk with a carrier surface divided into a central region and an edge region. The central region has a first vent, and the edge region has a second vent. An air cushion layer is provided between the wafer and the carrier surface, formed by gas being blown out through the first and second vents. The advantage of this invention is that, after using the wafer carrier device to carry the wafer for processing, no annular pattern defects will form on the wafer surface.

The utility model discloses a self-adaptive feeding cell culture device, belongs to the related technical field of cell culture, and aims to solve the problems that in the prior art, generally, an operator needs to suck added feeding materials into a rubber head dropper firstly and then drop the feeding materials into a cell culture dish, but when various feeding materials need to be added to cells, the operation is inconvenient, and the cost is low. The utility model discloses a cell culture device, which solves the problem that the working effect of the cell culture device is reduced due to the fact that an operator needs to collect supplemented materials for multiple times and then drip the supplemented materials, the operator cannot conveniently supplement the cells in time, and the cell culture device comprises a box body, the outer wall of the box body is rotatably connected with a knob through a bearing, and the lower end of the knob is fixedly connected with a turntable; and the lower end of the rotating disc communicates with a plurality of storage pipes, the lower ends of the multiple baffles are fixedly connected with one ends of the corresponding springs correspondingly, the other ends of the multiple springs are fixedly connected with the corresponding fixing plates correspondingly, and the outer walls of the multiple fixing plates are fixedly connected with the corresponding round pipes correspondingly.

The utility model provides a high-sealing and large-rigidity deep well electromagnetic valve. The high-sealing and large-rigidity deep well electromagnetic valve comprises an electromagnetic coil assembly, a valve body, a movable iron core and a coil shell. The electromagnetic coil assembly comprises a metal framework, a medium inlet is formed in the upper end of the metal framework, and a pressure-resistant cavity communicated with the medium inlet is formed in the metal framework; the valve body is in threaded connection with the lower end of the metal framework, a valve port communicated with the pressure-resistant cavity is formed in one end of the valve body, a valve port sealing assembly is installed at the valve port, and the valve port sealing assembly is limited between the valve body and the metal framework; the movable iron core is slidably mounted in the pressure-resistant cavity, and a sealing cone used for opening and closing the valve port is arranged at the end, facing the valve port sealing assembly, of the movable iron core. The coil shell is sleeved outside the electromagnetic coil assembly, and the upper end and the lower end of the coil shell are respectively welded and fixed with the metal framework through welding parts; the high-sealing and large-rigidity deep well electromagnetic valve overcomes the defect that an existing small safety electromagnetic valve is not suitable for the depth of three kilometers.

The invention relates to a high-activity nano-enzyme with rich gold nano-islands and a preparation method and application of the high-activity nano-enzyme. The invention belongs to the technical field of nanomaterials. The preparation method comprises the following steps: preparing a tellurium-selenium nanorod from a tellurium precursor substance, a selenium precursor substance and a reducing agent; and carrying out chemical reaction on the precursor substances of platinum and gold by taking the precursor substances as a chemical template. Wherein after a gold precursor substance is added, a large number of tiny gold particles distributed on the surface of the nanorod like islands are generated through chemical reaction between the gold precursor substance and a template component, so that more modification sites can be provided, the catalytic activity of the material is improved, the distance between a modification substrate and the platinum surface is closer, and efficient catalytic reaction is realized. The problems that in an existing combination mode of the platinum / gold heterostructure, gold particles and platinum particles are connected through a very small number of heterointerfaces, so that modifiers of gold particle parts are possibly far away from platinum particle parts, and catalytic reaction of platinum on the modifiers is not facilitated are solved.

The utility model relates to the technical field of file storage, in particular to a file management cabinet. The storage cabinet comprises a cabinet body, the cabinet body is provided with a plurality of drawing cavities, drawers are arranged in the drawing cavities, and storage cavities are formed in the drawers; a containing frame used for containing files is arranged at the containing cavity, drying frames are arranged in the containing cavity and located at the four corners of the containing frame, and the drying frames are provided with drying cavities used for containing drying agents. Compared with the prior art, the drying racks are arranged at the four corners of the storage cavity, compared with traditional single-position placement, drying agents are distributed more evenly, in addition, each drawer is internally provided with an independent placement rack, the drying agents are closer to the files, and the drying effect of the files is further improved.

A detachable orthodontic auxiliary arch tube device comprises a main body, the main body is provided with an installation opening used for installing a fixed orthodontic appliance, the installation opening penetrates through the front face and the bottom face of the main body, the side wall of the main body is further connected with a carrying tube, and the carrying tube is connected with a detachable auxiliary arch tube. After the auxiliary arch wire is arranged in the auxiliary arch tube, the whole auxiliary arch tube device is positioned on a specific tooth position, so that the auxiliary arch wire only applies force to the tooth position, and compared with an existing mode of applying force to the whole main arch wire, the auxiliary arch tube device can avoid applying force to the dentition in a segmented or whole-section manner, so that the correction efficiency and the correction effect are effectively improved.

The unmanned aerial vehicle pesticide spraying nozzle rotating locking assembly, nozzle, arm and unmanned aerial vehicle relate to the technical field of locking. In order to solve the technical problems that the existing pesticide spraying unmanned aerial vehicle has only a fixed spraying angle and spraying range due to the fixed structure of the nozzle, and cannot provide a more widely applicable pesticide spraying unmanned aerial vehicle, the technical scheme is that the locking assembly comprises a fixed seat, a movable seat and a sleeve. One end of the fixed seat away from the arm is provided with a connecting end, and a limiting protrusion is arranged on the end wall of the connecting end. A positioning protrusion is arranged on the inner wall of the sleeve. One end of the movable seat close to the arm is provided with a positioning groove. The limiting protrusion and the positioning protrusion are mutually arranged, and the position relationship between the sleeve and the connecting end is fixed. The positioning protrusion is also used for inserting into the positioning groove, and the position relationship between the fixed seat and the movable seat is fixed. The sleeve can move towards the arm to release the fixed position relationship. It is suitable for application in the design of the unmanned aerial vehicle pesticide spraying nozzle.

The application relates to the technical field of infrastructure, and proposes an integrated pile machine with an edge pile planting function for solving the problem of edge pile planting; a detachable edge pile planting device for planting piles close to obstacles is arranged on the front of the upright column on the chassis; a walking mechanism capable of moving quickly in the left-right direction and slightly in the front-back direction is arranged below the chassis; the edge pile planting device comprises a base, a lifting seat, a plurality of first clamping blocks, a lifting piston cylinder and a first clamping piston cylinder; the base is in the shape of a rectangle which is narrow in the front-back direction and wide in the left-right direction; four upright columns are arranged on the four corners of the base; the lifting seat is arranged above the base; a cross beam is connected to the top of the upright column; installation channels are arranged in the front end and the rear end of the lifting seat below the cross beam; the cylinder body of the lifting piston cylinder is fixedly arranged in the installation channel; and the free end of the piston rod of the lifting piston cylinder is fixedly arranged on the cross beam.

This utility model discloses a top-mounted, adjustable-speed rotary pencil sharpener, including a support cover, a pencil holder on the support cover, a support gear below the support cover, and a pair of support shafts inside the support cover. A start switch and a PCB circuit board are connected to the pencil holder on one side. The PCB circuit board is connected to the motor circuit, and the motor is connected to the support gear via a gear set. A blade holder is located below the support gear, and an adjustment component for adjusting the pencil tip thickness is located below the blade holder. The pencil tip thickness is controlled by the up-and-down movement of the adjustment rod via a seesaw structure. When the pencil tip reaches the top of the adjustment rod, the PCB circuit board controls the motor to reverse and retract the pencil. The closer distance between the motor and the blade assembly results in less motor power loss, a more compact connection structure with less mechanical friction noise, more stable motor speed, and a more stable center of gravity. The bottom shavings box design allows for a larger shavings capacity and easier cleaning.

This invention relates to a sawing and milling processing unit, processing center, and working method suitable for curtain wall profiles. The milling mechanism is used to perform sawing or milling operations. A sawing and milling fixture is used to clamp and fix the profile in both vertical and horizontal directions. The clamping block of the sawing and milling fixture, driven by a cylinder, moves vertically towards a fixed roller to achieve vertical clamping of the profile to be processed. The fixed roller has a semi-circular cross-section, with multiple sets of parallel air holes arranged in the semi-circular area. The line connecting these sets of air holes is located on one side of the fixed roller's axis. The angle α formed by the lines connecting air holes in adjacent sets of fixed rollers in the direction of the fixed roller's cross-section ranges from 100° to 120°. During profile feeding and processing, gas is ejected through the fixed roller, forming an "air cushion" on the bottom surface of the profile. This reduces the pressure of the profile's own weight on the surface of the fixed roller and simultaneously blows away aluminum chips from the bottom surface of the profile, solving the problem of scratches caused by sliding friction between the profile and the fixed roller.

The utility model discloses a quenching device, which relates to the technical field of heat treatment of workpieces and comprises a frame, a transfer mechanism, an electromagnetic heating coil and a cooling box. A mounting frame is arranged at the top of the rack; the transfer mechanism comprises a transfer frame and a clamp, the transfer frame is mounted on the mounting frame and can move and vertically ascend and descend relative to the mounting frame, and the clamp is mounted on the transfer frame; the electromagnetic heating coil is installed at the top of the rack and located on the working side, a vertically-arranged heating channel is defined by the electromagnetic heating coil, the heating channel is used for allowing the to-be-quenched workpiece clamped by the clamp to stretch in, and the electromagnetic heating coil is used for heating the to-be-quenched workpiece stretching into the heating channel; the cooling box is installed on the rack and located on the working side, an opening is formed in the top of the cooling box, the electromagnetic heating coil is located above the opening and located on one side of the opening, and cooling liquid is contained in the cooling box. The quenching device disclosed by the utility model reduces the labor intensity of workers and is safe and reliable.