13results about How to "Avoid doping" patented technology

The utility model discloses a textile cloth roll storage device for textile production relates to textile production technical field, including first shell, second shell, collect cloth roller and drive motor, first shell one side is provided with second shell, the second shell bottom is provided with base, base bottom and second shell bottom weld, first shell one side is hinged with second shell through the hinge, first shell top is welded with the hook, drives the rotation of axle seat through drive motor, and then makes axle seat drive collect cloth roller and rotate, and then makes collect cloth roller can drive textile cloth and wind, when textile cloth is wound to the surface of collect cloth roller in the clearance of first shell and second shell one end, under the action of air pump, makes the one end of air pipe can produce suction, and then makes the dust on the surface of textile cloth can be adsorbed and cleaned, and then is favorable to the winding after the cleaning of textile cloth surface, thereby avoiding the inside of textile cloth to mix dust when placing.

The utility model discloses a blood collection pool for livestock slaughtering, which relates to the technical field of livestock slaughtering, comprises a blood collection pool body, and is characterized in that a support frame is arranged at the bottom of the blood collection pool body, a blood discharge tube is connected to the bottom end of the support frame in a penetrating manner, an electromagnetic valve is arranged on the outer side of the circumference of the blood discharge tube, and an air flow groove is formed in the inner wall of the top of the blood collection pool body; a plurality of air flow acceleration assemblies are arranged in the air flow groove, accelerated discharge of air in the air flow groove is achieved through the air flow acceleration assemblies, and exhaust fans matched with the air flow groove are arranged on the two side walls of the top of the blood collection pool body in a penetrating mode. The blood collection pool for livestock slaughtering is reasonable and reliable in structure and easy to operate, dust or flies in air sucked into the airflow groove can be discharged in an accelerated mode, and therefore the sanitary efficiency of the blood collection pool for livestock slaughtering is improved, and the dust or flies in the air are prevented from polluting blood in the blood collection pool.

The invention discloses a preparation method of a 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex, and belongs to the technical field of polymer monomer preparation, aromatic diacyl chloride and aromatic ether are used as raw materials, a crude product of the 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex is continuously synthesized under the catalysis condition of a Lewis acid catalyst, and the crude product of the 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex is subjected to post-treatment to obtain the 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex. The high-purity 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex can be used as a polyether ketone ketone active monomer, and the effect of the active monomer can be exerted without adding aluminum in the polymerization reaction process.

The invention belongs to the technical field of optical communication, and particularly discloses a preparation method of an ultra-low attenuation optical fiber and the ultra-low attenuation optical fiber, and the preparation method comprises the steps: S1, preparing a fluorine-doped sleeve with non-uniform fluorine distribution through employing an external vapor deposition technology; s2, stretching and corroding the fluorine-doped sleeve to obtain an inner cladding with a predetermined aperture; s3, SiO2 is deposited in the inner cladding layer by using an in-tube vapor deposition process, alkali metal doping is performed to form a core layer, the inner cladding layer with the core layer is melted and shrunk into a rod shape, and a rod-shaped structure is obtained; s4, preparing an outer cladding layer outside the rod-shaped structure through an external vapor deposition process, drying the rod-shaped structure with the outer cladding layer, and solidifying in a fluorine-containing atmosphere to obtain an optical fiber preform; and S5, drawing the optical fiber preform to form the optical fiber. According to the preparation method, external chemical vapor deposition and in-tube vapor deposition are utilized to achieve better optical fiber profile matching and viscosity matching.

The utility model discloses a catalyst surface powder scraping machine which comprises a clamping mechanism, a scraping mechanism and a dust collecting mechanism. The clamping mechanism is used for clamping and fixing the catalyst, the scraping mechanism is used for rotationally scraping the surface of the catalyst, the scraped material enters the collecting bin through the negative pressure material suction pipeline, the collecting bin adopts a fixed bin and a movable bin which are split, and after the fixed bin and the movable bin are assembled, the movable bin is free of an exposed notch and is in a closed state; and dust cannot overflow into the working environment after entering the movable bin, it is also guaranteed that all materials can enter the movable bin, the powder collecting rate is improved, the movable bin is taken out after collection is completed, and follow-up operation is facilitated.

The utility model provides a construction waste crushing device which comprises a shell, a crushing device, a crushing device and a crushing device, wherein the shell is provided with a crushing cavity in the vertical direction; the extrusion plate is matched with the shell to extrude and crush the construction waste in the crushing cavity so as to separate concrete wrapping the outer wall of the reinforcing steel bar; the output end of the extrusion plate is connected with the shell, the output end of the driving part is connected with the extrusion plate, and the driving part is used for driving the extrusion plate to move in a reciprocating mode. The extrusion plate is matched with the shell to primarily extrude concrete and reinforcing steel bars which are connected together, and the impact block is matched with the shell to extrude and crush the concrete and the reinforcing steel bars again; the concrete block is continuously impacted by the impact block, the concrete block is broken, then the steel bars wrapped in the concrete block are separated from the concrete, recycling of the steel bars is facilitated, the steel bars are prevented from being doped in the concrete aggregate, and reproduction of the concrete aggregate is facilitated.

The utility model relates to the technical field of detection equipment, in particular to a rice detection layering device which comprises a sampling pipe and a pressing rod, a cavity is formed in the sampling pipe, a sliding groove with a closing part closed in a sliding mode is formed in one face of a closing opening, a plurality of circular containing bins are arranged on the pressing rod in the cavity, and the outer walls of the containing bins are attached to the inner wall of the cavity. The two sides of each storage bin are provided with feeding ports, the feeding ports in the two sides of each storage bin are provided with connecting plates, the connecting plates are provided with two sliding blocks for driving the closing parts to slide, and through the arrangement of the closing parts and the storage bins, when the pressing rod is pressed, the connecting plates and the sliding blocks on the multiple storage bins in the cavity can drive the closing parts to slide in the sliding grooves in the descending process; by means of the technical scheme, the problems that in the prior art, unhulled rice in an unhulled rice detection layering device is scattered due to vibration, toppling and the like, the sample amount is reduced, the samples are polluted by the external environment, and the accuracy of the detection result is affected are solved.

The utility model discloses hydrogen peroxide catalyst adding equipment, which relates to the technical field of hydrogen peroxide processing and comprises a reaction tank, a support is arranged at the top of the reaction tank, a motor is arranged at the top of the support, a rotating shaft is arranged at the bottom of the motor, and four connecting rods are arranged outside the rotating shaft. And rotary stirring rods are arranged outside the four connecting rods. According to the device, the motor is started to drive the connecting rod to mix and stir hydrogen peroxide and a catalyst, the hydrogen peroxide and the catalyst can be further mixed and stirred through the rotating stirring rod, and the interior of the reaction tank and the stirring mechanism can be cleaned through the arranged water pump, water pipe and annular spraying head; and the inner wall of the reaction tank can be scraped by rotating the cleaning scraper, and the inner wall of the tank body can be brushed by matching with sprayed water, so that impurities formed by some residual reaction materials in the tank body are prevented from being doped with a product in the next reaction, and the quality and purity of subsequent products are ensured.

The utility model discloses corn seed screening equipment, and belongs to the technical field of corn seed screening. The feeding hopper is communicated with the left side of the top of the screening box, the L-shaped channel plate is fixedly connected to the inner wall of the screening box, and through cooperation of the screening box, the feeding hopper, the L-shaped channel plate, an air blower, an embedding groove, an embedding frame and a dust blocking net, corn seeds can be winnowed when falling, and the corn seeds can be screened conveniently. According to the corn seed winnowing device, seeds, abnormal plants and dust with diseases and insect pests can be removed, the seeds, the abnormal plants and the dust are blown into a dust blocking net to be collected, the dust is prevented from polluting the working environment, then through cooperation of a screening channel, a first screening hole, a second screening hole, a third screening hole and a collecting drawer, the winnowed corn seeds can be screened from small to large in sequence, and the screening efficiency is improved. And the corn seeds are collected respectively, so that the corn seeds with different grain shapes and sizes are prevented from being mixed together, and the phenomenon of irregular seedling emergence caused by different sizes of the seeds can be reduced.

The utility model relates to waste and old plastics recycling technical field, concretely is a kind of waste and old plastics recycling feeding machine, it includes: machine body, including conveyer;Crushing discharge mechanism, including discharge chute, the discharge chute fixedly connected at the surface of conveyer, the inside fixedly connected of discharge chute limit slot, the surface movable joint of limit slot limit rod. The utility model is connected through the connection of screening disc and mounting plate, the connection of mounting plate and vibration motor, can start vibration motor drive screening disc vibration screen plastic particles, then through the connection of screening disc and limit rod, the connection of limit slot and limit rod, limit the vibration position of screening disc, again through the connection of first drive motor and crushing roller, the connection of crushing roller and first connecting shaft, can start first drive motor drive crushing roller rotation, to carry out crushing to larger plastic particles, reach the effect that avoid the adulteration of larger particles in the plastic particles of discharge.

The utility model discloses a pipeline fluid damper, including the casing, still include the foamed material filler of installing in the inside of casing, install on the gland of casing, install the rubber diaphragm of foamed material filler inside and install chuck interface on the casing, rubber diaphragm is tubular and is set up in the inner ring of foamed material filler, the utility model discloses not like traditional pipeline formula damper and make gas and liquid flow in one space, and the device fluid only contacts chuck interface and rubber diaphragm, can prevent liquid and gas from reacting, consume gas, prolong the service life of equipment, also prevent the liquid flowing through the damper from mixing the impurities generated by reacting with gas, the utility model discloses simple structure, and the number of parts is few, and dismounting is convenient, greatly reduces the cleaning difficulty, can satisfy the steady flow demand to different liquid, reduces the installation and maintenance cost of equipment.

The utility model relates to the technical field of electro-fused white corundum cooling and dust removal, and discloses an electro-fused white corundum cooling and dust removal device which comprises a cooling and dust removal mechanism and a bag-type dust remover, the cooling and dust removal mechanism comprises a cooling and dust removal box, a cooling fan and a mounting water pipe, and a top cover is fixedly mounted at the top of the cooling and dust removal box. And a plurality of mounting water pipes are fixedly mounted on the inner walls of the two sides of the top cover. Through the arrangement of a mounting water pipe, a water spraying head and the like, water mist can make more uniform contact with materials, the heat exchange speed is increased, the material cooling time is effectively shortened, the production efficiency is improved, through the arrangement of a cooling dust removal box, a cooling fan and the like, airflow is guided through a connecting air pipe in a matched mode, external cold air can be rapidly sucked into the box, and the cooling efficiency is improved. Good air convection is formed, material cooling is accelerated, the stability and high efficiency of the cooling process are guaranteed, external dust and impurities are prevented from entering the cooling dust removal box, and impurities are prevented from being doped in the fused white corundum.

The invention relates to the technical field of semiconductors, and discloses a semiconductor structure and a preparation method thereof, and the method comprises the steps: providing a substrate with a gate structure layer, and the gate structure layer comprises a plurality of gates which are arranged at intervals; forming a sacrificial layer between the gates on one side, deviating from the substrate, of the gate structure layer; forming a first oxide layer covering the sacrificial layer and the gate structure layer on one side, away from the substrate, of the sacrificial layer; etching the first oxide layer to expose the upper surface of the sacrificial layer; and removing the sacrificial layer and the first oxide layer and the gate structure layer located in the self-aligned source-drain contact region to form a self-aligned metal layer. According to the technical scheme, through preparation and removal of the sacrificial layer, the depth-to-width ratio of dry etching is reduced, the reaction space of wet etching is improved, the oxide layer between the grids can be fully etched, it is ensured that the oxide layer on the surface of the substrate can be completely removed, the quality of the self-aligned metal layer is improved, and the yield of the self-aligned metal layer is improved. And the contact resistance of the self-aligned metal layer is reduced.