40results about How to "Improve dust blocking effect" patented technology

The invention adopts hollow polyester fiber, polyester short fiber and ES fiber according to mixture ratio of 1-4:1-4:2-8, including the steps of loosening-> quantitative feeding-> hot melting->cold roll forming->hot rolling->air cooling->trim cutting. The fiber of the invention is conglutinated after hot melting treatment; therefore, fiber pad has good toughness and uniform density and stable structure; the produced filtering material has large pore space, good loading capacity which is difficult to be deformed with small resistance and large dust holding performance and good filtering effect.

The invention relates to a portable central processing unit (CPU) controlled high-power electric welding machine. The electric welding machine comprises a CPU control circuit board, a radiator, an air fan and a shielding layer which are arranged in a shell; and a high-frequency resonant soft switch circuit which consists of four insulated gate bipolar transistor (IGBT) power transistors Q1, Q2, Q3 and Q4, two resonant inductors L1 and L2, a high-frequency transformer T1, two fast recovery diodes D1 and D2, an input filter capacitor C1, a resonant capacitor C2, an output filter capacitor C3 and a ferrite reactor L3 is also arranged in the shell. The CPU control circuit is adopted to realize digital button operation, a pulse width modulation (PWM) wave form is output by CPU given control current to control a driving transformer, the on/off of the IGBT power transistors is regulated to control the high-frequency transformer to do work, rectification is performed by the fast recovery diodes, the resonant inductors and the resonant capacitors play a role in realizing resonant frequency and feeding back energy, and the resonant frequency and the energy are finally output by the ferrite reactor. The CPU centralized control is realized; moreover, the high-power electric welding machine has low fault rate, high insulativity, a good dust blocking effect and long service life, is convenient to operate, saves energy, reduces consumption, prevents interference, and is low in production cost and use cost.

The invention discloses an automobile exhaust filtering respirator for traffic police. The automobile exhaust filtering respirator comprises an inner layer, a middle layer and an outer layer, wherein the outer layer is a bowl-like carbon dust filtering layer; the middle layer is a tile toxic gas filtering layer; a paster fit with the wing of nose is stitched in the middle; the inner layer is a reticulated gauze layer; and mixed particles consisting of active carbon, manganese dioxide and copper oxide are added in the toxic gas filtering layer. The automobile exhaust filtering respirator has the characteristics of safety, comfort, convenience, attractiveness and good filtering effect, and is suitable for traffic police and related personnel facing automobile exhaust for a long time.

The invention discloses a producing method of a natural mineral absorbing and filtering oronasal respirator. The point of the technic proposal is that the producing method of the natural mineral absorbing and filtering oronasal respirator is that: choosing natural mineral absorbing and filtering agent as the raw material of the natural mineral absorbing and filtering oronasal respirator; moistening the agent and pressing into an oronasal respirator roughcast with an arc plate-shaped solid formation; then airing, baking and drilling the oronasal respirator and finally packing the oronasal respirator to a finished product. With good dust resisting effect, the natural mineral absorbing and filtering oronasal respirator can effectively absorb the soot smaller than 5 micron, the toxic gas and the harmful bug, which prevents the soot, the toxic gas and the harmful bug from being directly absorbed into the alveolus so as to guarantee the body health of the user. The natural mineral absorbing and filtering oronasal respirator is characterized by small respiration resistance, light weight and peculiar smell absorption, which can be used repeatedly after being disinfected and dried. The invention is suitable for producing the semi-ellipse bowl-shaped absorbing and filtering oronasal respirator.

The invention discloses a production method of an absorbing and filtering oral-nasal mask. The key points of the technical proposal lie in the production method of the absorbing and filtering oral-nasal mask. The production method is that: absorbent gauzes and sterilizing medical gauzes are respectively used at the left face and the right face of a natural mineral absorbing and filtering oral-nasal mask. The absorbing and filtering oral-nasal mask is made according to different shapes at the two faces of the natural mineral absorbing and filtering oral-nasal mask. The frontage of the absorbing and filtering oral-nasal mask is provided with four through holes and package is the finished product of the absorbing and filtering oral-nasal mask. The absorbing and filtering oral-nasal mask has good dustproof effect, which can absorb and filter respiratory dust and detrimental pathogenic bacteria of less than 5 microns, thus preventing dust and detrimental pathogenic bacteria from being directly sucked into pulmonary alveolus and guaranteeing body health of users. The invention is characterized by small breath resistance, light weight and being capable of absorbing peculiar smell and being reused for a plurality of times after sterilization and evaporation, which is applicable for producing three-dimensional absorbing and filtering oral-nasal masks with a shape like an arched plate.

The invention relates to the field of dust removal in coal mines, in particular to a method and device for automatically isolating dust sources and generating sprays for dust control and suppression.The device comprises lifting cylinders and a dust blocking curtain, wherein a nozzle mounting frame is mounted on the top of the lifting cylinders; and the nozzle mounting frame is provided with a plurality of nozzles. In the device for automatically isolating the dust sources and generating the sprays for dust control and suppression, the position of the dust blocking curtain is changeable in theup and down direction rather than fixed or unchangeable. When the device is in use, the lifting cylinders are used for lifting the dust blocking curtain, and the lifting cylinders do not rise when acoal cutting machine moves, so that the view of a driver is not blocked. During coal cutting, the dust blocking curtain rises, and the height of the dust blocking curtain plus the height of a chute isolation belt can effectively prevent dust from overflowing. In addition, the sprays from the nozzles are used for dust suppression treatment, and the dust can quickly fall into a chute.

The invention belongs to the technical field of drilling equipment and particularly discloses drilling equipment for industrial machinery production. Aiming to the problems of simple structure, relatively poor dust collection effect in the drilling process and easiness in environmental pollution caused by splashing of debris of existing drilling equipment, the following technical scheme is provided: the drilling equipment for industrial machinery production comprises a base; an L-shaped plate is fixed to one side of the outer wall of the top of the base through a screw; an electric telescopicrod is fixed to the outer wall of the bottom of the L-shaped plate through a screw; a fixed block is fixed at one end of a piston rod of the electric telescopic rod through a screw; a fixed groove isformed in the outer wall of the bottom of the fixed block; a motor is fixed to the inner wall of the fixed groove through a screw; and a drill bit is connected to an output shaft of the motor througha coupling. For the drilling equipment disclosed by the invention, by arranging the motor, the electric push rod and a dust suction pump, the piston rod of the electric push rod can be controlled to shrink, a dust blocking cover is guaranteed to be always in a state of being attached to a steel plate, a good dust blocking effect is exerted, and pollution of the debris to the surrounding environment is avoided.

The invention discloses a producing method of a natural mineral absorbing and filtering respirator. The point of the technic proposal is that the producing method of the natural mineral absorbing and filtering respirator is that: choosing natural mineral absorbing and filtering agent as the raw material of the natural mineral absorbing and filtering respirator; moistening the agent and pressing into a semi-ellipse bowl-shaped respirator; then airing, baking and drilling the respirator and finally packing the respirator to a finished product. With good effect, the natural mineral absorbing and filtering respirator can effectively absorb the soot smaller than 5 micron, the toxic gas and the harmful bug, which prevents the soot, the toxic gas and the harmful bug from being directly absorbed into the alveolus so as to guarantee the body health of the user. The natural mineral absorbing and filtering respirator is characterized in small respiration resistance, light weight and peculiar smell absorption, which can be used repeatedly after being disinfected and dried. The invention is suitable for producing the semi-ellipse bowl-shaped absorbing and filtering respirator.

The invention belongs to the technical field of network monitoring, in particular to a protection device for for a network monitoring management server. The device resolves the problem in the prior art that a protection shell for a conventional network monitoring management server is relatively simple in structure; and the protection measures for the server are not enough. The invention providesa technical scheme characterized in that supporting legs are welded to the four corners of the outer wall of the bottom of the shell; water-cooling curved pipes are arranged at the upper end and the lower end of the interior of the shell correspondingly, a refrigeration box is fixed to the outer wall of one side of the shell through bolts, mounting grooves are formed in the two sides of one end ofthe refrigeration box correspondingly, parallel arc-shaped ends are welded to the inner walls of the mounting grooves correspondingly, and a groove is formed in the end, close to the bottom end, of the refrigeration box. Through cooperation of a heat exchange plate and a curved groove, the heat exchange area can be effectively increased, and the refrigerating and cooling effect on water cooling liquid are improved; and through an arranged drainage channel, the contact area of the heat exchange plate and water cooling liquid can be further increased, and then the water cooling effect is further improved.

The invention relates to a sludge drying system based on gradient utilization of energy. The sludge drying system comprises a disc drying system and a pressing filtration drying system, wherein the disc drying system comprises a shell, a stirring shaft is installed in the shell, disc sheets are separately installed on the stirring shaft, the top of the shell is provided with a sludge inlet and a vapor outlet, the bottom is provided with a dried sludge outlet, the stirring shaft is driven by a motor at one end, the stirring shaft is of a hollow structure, one end of the stirring shaft is a heat vapor inlet, and a condensated water export tube is inserted on the end. The pressing filtration drying system comprises a pressing filtration system, a sludge feed system connected with the pressing filtration system, a vacuumizing system, a heat water circulating system, and a sludge output system, wherein the sludge feed system is connected with a sludge feed end of the pressing filtration system, the sludge output system is connected with a sludge discharge end of the pressing filtration system, the vacuumizing system is used for keeping the pressing filtration system to be at a negative pressure state when the pressing filtration system presses and filters the sludge, and the heat water circulating system is connected with the vapor outlet of the disc drying system.

The invention belongs to the technical field of traditional Chinese medicine, particularly relates to a traditional Chinese medicine meridian and collateral dynamic photoelectric demonstrator, and aims at the problem that most of various existing meridian and collateral displaying products display plane static images and cannot show the dynamic trends of the meridians and collaterals, In order tosolve the practical problems, the invention provides a photoelectric dynamic demonstration scheme. The traditional Chinese medicine meridian and collateral dynamic photoelectric demonstrator comprisesan organic glass plate and an operation control cabinet, wherein a human body meridian and collateral model pattern is sprayed and coated at one side of an organic glass plate; a plurality of lamp holes are formed in the outer wall of one side; a lamp strip is inserted and connected to the inner walls of lamp holes; fixing holes are formed in positions of four corners of one side of the organicglass plate; fixing screw bolts are inserted and connected to the inner walls of the fixing holes; the organic glass plate is connected with an installing frame through the fixing screw bolts; the lamp strip is fixed according to a meridian and collateral path; and the luminous color and sequence and the luminous time of LED lamps are controlled by the control cabinet. By using the traditional Chinese medicine meridian and collateral dynamic photoelectric demonstrator, people can more intuitively see the meridian and collateral trends, so that ordinary people can also clearly see each meridianand collateral; the spreading and study of traditional Chinese medicine culture are convenient; the diagnosis effect of the traditional Chinese medicine is improved; and the application range is wide.

The invention discloses a flexible inner wall floating grinding table, which relates to the technical field of machining, and solves the problems that the labor intensity of workers is high, the cleaning speed is low, meanwhile, dust needs to be adsorbed through a dust suction table in the cleaning process, the adsorption effect is poor, dust diffusion is caused, and the environment is polluted. Theflexible inner wall floating grinding table comprises agrinding table support, a machining assembly and a residue collecting assembly, wherein the machining assembly is composed of a cutter lifting mechanism, a front-back sliding transposition mechanism, a cutter feeding mechanism, a cutter position adjusting mechanism, a floating machining mechanism and a dust adsorption assembly; and the residue collecting assembly is located on the lower portion of the workpiece fixing assembly and between the two groups of machining assemblies. Dust diffusion is effectively avoided, environmental pollution is reduced, residues are collected and treated in a centralized mode, floating type automatic machining of the inner wall of a workpiece is achieved, any type of residues can be well polished, labor force is liberated, the working efficiency is improved, the machining quality is improved, and meanwhile the occupied space is small.

The invention provides a muck crushing device with a dust removal function. The muck crushing device with the dust removal function comprises a crushing box used for crushing muck, supporting legs used for supporting the crushing box, a muck crushing mechanism used for crushing the muck and a mist diffusion dust removal mechanism used for restraining raised dust, the bottom of the crushing box is fixedly connected with the supporting legs, the muck crushing mechanism is arranged on the crushing box, and the mist diffusion dust removal mechanism is arranged on the crushing box and the muck crushing mechanism. The invention relates to the field of dust removal. According to the muck crushing device with the dust removal function, a special structure capable of generating a large amount of reasonably-distributed water mist in real time to remove dust is designed according to the problem that a large amount of dust exists in an existing muck crushing process, and therefore, the problem that when a common crushing device crushes muck stones containing thick soil layers, a large amount of dust can be generated, and the dust can cause major pollution to the working environment of workers is effectively solved.