136results about How to "Reduce health damage" patented technology

The invention discloses an alcohol-based fuel combustion improver and an alcohol-based fuel. The alcohol-based fuel combustion improver consists of 4.9-93 parts by weight of co-solvent, 4.9-93 parts by weight of bio-oil, 0.1-0.3 part by weight of smoke suppression combustion improver and 1.0-3.0 parts by weight of combustion improver; and the alcohol-based fuel is formed by mixing and stirring 80-99 parts by weight of methanol and 1-20 parts by weight of alcohol-based fuel combustion improver. By adopting the combustion improver disclosed by the invention, the prepared alcohol-based fuel is a novel biological environment-friendly alcohol-based fuel, the calorific value is as high as 6,000-10,000 calories / g, and the combustion performance is good; and moreover, the alcohol-based fuel has high flash point and low volatility, and potential safety hazards in the prior art are eliminated. The alcohol-based fuel disclosed by the invention also has the characteristics of being safe and environment-friendly, reproducible, clean and sanitary, convenient to use, cheap and the like.

Disclosed is a kind of tobacco and cigarette for reducing harmful constituents, which is prepared by mixing hydroxyapatite with tobacco or attaching onto tobacco of the surface of cigarette paper, the hydroxyapatite is the common type one or calcium-loss type one, in addition, other ingredients including tricalcium phosphate and clay can also be charged. The prepared tobacco and cigarette can decrease the content of hazardous substance in the smoke.

The invention relates to a rapid salting method of low-salt salted pork. The method comprises the following steps of 1. cutting selected streaky pork with equivalent fat-muscle into strips; 2. measuring table salt and pork according to the salt-to-pork ratio being 3 to 4 percent, dissolving 2 percent of table salt into little water, and uniformly injecting the salty water into the pork by utilizing a salty water syringe; 3. respectively measuring 2 to 2.5 percent of white spirit, 0.2 to 0.6 percent of paprika powder and 0.2 to 0.4 percent of fennel powder, mixing the white spirit, the paprika powder and the fennel powder with the residual table salt, and kneading the pork with the mixture; 4. arranging the pork into a rolling kneading machine, and vacuum intermittently rolling kneading the pork at the low temperature at the condition of controlling the temperature at 0 to 4 DEG C, the vacuum degree to be 0.08MPa and the rotating speed to be 10r / min,; 5. hanging the pork under the condition that the temperature is 8 to 12 DEG C and the relative humidity is 60 to 70 percent, and standing and drying the pork for 2days; 6. Carrying out fire curing; 7. naturally carrying out air drying and cooling for 24h, and carrying out vacuum packaging on the pork to obtain a finished product. The low-salt salted pork is bright in color, delicious in taste, tender in tissue and obvious in scent and can be reserved for one year under the vacuum packaging cold storage condition without going bad.

The invention provides cell lysis solution for extracting animal DNA, a kit containing the lysis solution and a method for extracting animal DNA by using the kit. The cell lysis solution provided by the invention comprises Tris-base at a concentration of 20 to 30g / L, ethylene diamine tetraacetic acid (EDTA) at a concentration of 0.5 to 1.0g / L, sodium dodecyl sulfonate (SDS) at a concentration of 20 to 30g / L, NaCl at a concentration of 5 to 10g / L, urea at a concentration of 100 to 150g / L and the balance of sterile water, and the pH value of the cell lysis solution is regulated by NaOH to 8.0 to 9.0. When the animal DNA extraction kit provided by the invention is used, the extraction time is reduced by at least half hour compared with that in the prior art, the use of chloroform with strong toxic odor is avoided, the damage to the health of operators in an operation process is relieved, and the extracted DNA is high in yield and purity. The method provided by the invention is quick, simple, convenient, efficient and very repeatable. In the invention, the result is very stable, the success rate is high, extraction cost is reduced and large-scale extraction of DNA is easy.

The invention, belonging to the field of construction engineering, relates to an anti-stripping warm mix asphalt additive agent comprising surfactant, its preparation method and application. The anti-stripping warm mix asphalt additive agent disclosed in the invention comprises polyvinyl acetal, polyacrylamide, fatty acid anhydride ester surfactant, polyoxyethylene acid ester surfactant and water. The warm mix asphalt additive agent disclosed in the invention can enhance the bonding of stone, rock flour and asphalt, so as to get the purposes of high strength and preventing stripping. The requirements of the technical characteristics of the warm mix asphalt is realized by spraying the additive agent with the content of 5-6% of the weight of the asphalt when the temperature of the asphalt reaches 120-130 DEG C, and then carrying out blending and operation as routine asphalt. The warm mix asphalt additive agent disclosed in the invention has no substances which are harmful to the human body and environment, with being environmentally friendly, and is an excellent product with energy saving and emission reduction.

The invention discloses an electrolytic corrosion method of a stainless steel / carbon steel composite plate metallographic structure. According to the method, by means of the effects that an alcohol solution with the volume fraction of nitric acid being 2%-10% is used for corroding carbon steel and 5%-60% of a chromic acid solution is used for performing electrolytic corrosion on stainless steel, influences on the metallographic structure of the carbon steel are extremely small while electrolytic corrosion is performed on one side of the stainless steel. The method is good in corrosion effect, and the stainless steel / carbon steel composite plate metallographic structure can be displayed clearly.

The invention belongs to the technical field of anticorrosive paint and discloses flexible geopolymer-based anticorrosive paint and a preparation method and application thereof. The flexible geopolymer-based anticorrosive paint comprises a component A, a component B and a component C. The component A is prepared from, by weight, 15-80 parts of a geopolymer gel base material and 20-85 parts of pigments and fillers. The component B is prepared from, by weight, 40-85 parts of an alkali activator, 0-15 parts of a curing regulator, 0-6 parts of a rheological modifier and 7-45 parts of water. The component C refers to a functional toughening additive. The lexible geopolymer-based anticorrosive paint has advantages that defects of high brittleness and proneness to cracking failure of traditionalpolymer paint are overcome, and excellent flexibility of a material is achieved; in addition, the paint contains zero VOC and is low in toxicity and environmentally friendly, a coating is compact andstable, excellent corrosion resistance, permeation resistance and durability are achieved, and the flexible geopolymer-based anticorrosive paint is applicable to steel structure and concrete surface protection of infrastructures of cultural relics, buildings, municipal administration, roads, subways and the like.

The invention discloses a construction method of a warm mix asphalt concrete pavement of a municipal road. The construction method comprises the following steps: 1, reforming and adjusting the traditional mixing equipment; 2, determining the construction temperature of a warm mix mixture; 3, mixing the mixture; 4, transporting the warm mix mixture to the construction position; 5, paving the warm mix mixture; 6, compacting the paved warm mix asphalt mixture. Compared with the prior art, the construction method has the beneficial effects that the mixing cost and production consumption of the asphalt mixture are lowered, the ageing is alleviated, the pavement performance is improved, the emissions of harmful gas and dust are reduced, the environmental pollution is lowered, and the working environment quality of a worker is improved.

The invention discloses automatic cleaning equipment for quartz rods. The automatic cleaning equipment comprises a cleaning support (1), wherein a conveying device (6) is arranged on the cleaning support (1), the conveying device (6) is connected with a lifting mechanical arm (7) through a connecting piece (61), the conveying device (6) drives the lifting mechanical arm (7) to move in the length direction of the cleaning support (1), and a filtering plate (8) for placing the quartz rods (81) is arranged on the lifting mechanical arm (7); a pickling tank (2), a cleaning tank (3) and a drying tank (4) are sequentially arranged below the cleaning support (1) in the length direction of the cleaning support (1), and the outsides of the pickling tank (2), the cleaning tank (3) and the drying tank (4) are each provided with an induction window (5) for the lifting mechanical arm (7) to pass through. The automatic cleaning equipment has the characteristics of improving the cleaning efficiency,reducing the amount of manual labor, reducing the pollution of the working environment and improving the safety.

The invention provides a city haze air purification balance system comprising a haze detection device, an air purification system and a controller, wherein the haze detection device comprises a light emitting pipe and a light receiving pipe; the light emitting pipe emits directed light beams; the light receiving pipe detects city air haze conditions by receiving the light beams emitted from the light emitting pipe; the light emitting pipe and the light receiving pipe are opposite in arrangement; the controller is respectively connected with the haze detection device and the air purification system, and can control the air purification system to be started for purifying city air when the city haze condition exceeds the standard. According to the air purification system, clean energy such as wind power generation, solar power generation is used for supplementing power needed by air purification, the amount of coal power is reduced, and the city haze air purification balance system is an energy-saving environment-friendly device. The city haze air purification balance system can be used for improving the air cleanliness, ensuring life and production orders of people, and reducing health damage of hazes to human bodies.

The invention belongs to the technical field of anticorrosive coatings, and discloses a permeation consolidation type solvent-free epoxy anticorrosive coating, and a preparation method and an application thereof. The anticorrosive coating consists of a component A and a component B. The component A consists of the following components in parts by weight: 18-89 parts of epoxy resin, 5-50 parts of enhanced type reactive solvents, 5-60 parts of permeation type reactive solvents, 0-5 parts of interfacial modifiers and 0-3 parts of permeation enhancers. The component B consists of the following components in parts by weight: 5-95 parts of functional curing agents, 0-30 parts of curing regulators, 0-50 parts of double-function regulators, 0-40 parts of curing accelerators and 0-5 parts of condensation catalysts. The coating is low in viscosity and excellent in permeability, and has an excellent mechanical property after being cured. In addition, the permeation consolidation type solvent-free epoxy anticorrosive coating disclosed by the present invention has good wettability and viscocity with concrete, and strength of the concrete can be improved, water on the surface of the concrete can be removed, and surface corrosion factors of the concrete are reduced.

The invention discloses a health protection method which comprises the following steps: detecting whether the time of using electronic equipment continuously by a user reaches a first pre-set time; and if the time of using the electronic equipment continuously by the user reaches the first pre-set time, closing the display function of the electronic equipment. By using the health protection method, when a user uses the electronic equipment for a long time, the display function of the electronic equipment can be automatically closed so that the user can rest for a while to relieve nervousness and eye fatigue and reduce harm to health. The invention also provides electronic equipment using the health protection method.

An aqueous crackle paint is prepared by using an aqueous crackle primer, an aqueous crackle finish and an aqueous enamel through a coating technology, the primer and the finish form a crackle shape, and the enamel has color modification and crackle effect finish protection effects. The above three coatings use aqueous acrylic resin as a main body resin of a film and contain methylated melamine formaldehyde resin as a high temperature crosslinking agent, aqueous CAB and parts of an alcoholic solvent are introduced to a formula system in order to achieve an ideal surface drying speed, and fumed silica, talcum powder and other high oil absorbing fillers are used to adjust the critical PVC concentration of the formula system and adjust the shrinkage stress of the film. The coating technology of the aqueous crackle paint comprises the following steps: spring the aqueous crackle primer, carrying out surface drying at normal temperature for 5min, spraying the aqueous crackle finish, carrying out constant temperature treatment at 150DEG C for 20min, spraying the aqueous crackle enamel, and carrying out constant temperature treatment at 150DEG C for 20min to obtain the aqueous crackle paint.

The invention provides a self-moving multi-stage dust settling device for a tunnel. The self-moving multi-stage dust settling device comprises a track and a dust settling device. The track is mountedon a vault of the tunnel along the axial direction of the tunnel; the dust settling device is hoisted on the track and can move linearly in the tunnel along the track; the dust settling device is provided with a spraying device for spraying water mist to the tunnel to dedust the tunnel; the spraying device controls swing and shrinkage of the spraying device through an electric cylinder; and the dust settling device comprises a first dust settling device, a second dust settling device and a third dust settling device for spraying the tunnel all around. The self-moving multi-stage dust settlingdevice is hoisted on the top of the tunnel and the spraying device can stretch, so that occupation of the space of the tunnel is reduced greatly. Normal work of other equipment and transit of tunnel constructors are not affected while the tunnel is sprayed to dedust, so that the tunnel construction efficiency is improved.

The invention discloses a ton bag pressing device. A ton bag comprises an inner bag opening and an outer bag opening, the bag pressing device is arranged at a feeding opening of a feeding cavity, theinner bag opening is arranged in the feeding opening, the bag pressing device comprises a bag pressing piece, and the bag pressing piece presses the outer bag opening to the outer wall of the feedingopening. The ton bag pressing device has the advantages of being simple in structure, convenient to operate, capable of tightly pressing the bag and the like. The invention further discloses a feedingstation using the ton bag pressing device. The feeding station has the advantages of being smooth in discharging, practical, efficient, not prone to generating dust and the like.

The invention discloses an automatic processing machine of an erhu tube. The automatic processing machine comprises a work table, and a sliding plate unit, a vertical compression unit, a hexagonal locating plate, a molding cutter, a main motor, a servo motor and a draught hood shell which are arranged based on the work table, wherein the sliding plate unit, the vertical compression unit and the hexagonal locating plate are used for loading the erhu tube to be processed, compressing the erhu tube and enabling the erhu tube to shift back and forth relative to the molding cutter; the molding cutter is arranged a working platform in a locating way and is driven to rotate by the main motor; the hexagonal locating plate is driven to rotate along with the molding cutter by the servo motor; the draught hood shell is arranged at the outer side of the part where the molding cutter is connected with the erhu tube, is in a wrapping shape and is externally connected with an air pump; the work table is internally provided with an electric control circuit and a pneumatic circuit in separate design and capable of driving the air pump, a motor or a cylinder respectively; the working platform is provided with a start button and an emergency stop button. The automatic processing machine is high in automated processing efficiency, low in labor intensity, good in processing quality, high in consistency, small in harm to the health of an operator, easy to operate, easy to master by a common worker, safe and reliable.

The invention discloses a method of determining chemical oxygen demand in a chlorine-containing water sample. The method comprises the following steps: first homogenizing the chlorine-containing water sample, then centrifugally separating an appropriate amount of the treated water sample at a high speed to obtain a clear solution I and a precipitate I; adding a potassium dichromate solution into the clear solution I, then gradually dropwise adding silver nitrate, precipitating chlorine ions in the clear solution I, stopping when a brick-red precipitate appears to obtain a sample I; centrifugally separating the sample I, and collecting a clear solution II; sufficiently mixing the precipitate I and the clear solution II to obtain a mixed solution, transferring an appropriate amount of the mixed solution into a digestion tank, adding the potassium dichromate solution and a silver sulfate-sulfuric acid solution, oscillating, uniformly shaking, and microwave digesting to obtain a sample II; finally cooling the sample II to the room temperature, uniformly shaking, transferring the sample II into a colorimetric tube, determining the content of trivalent chromium ions on a spectrophotometer by adopting a colorimetric method, and further calculating to obtain a COD value of the chlorine-containing water sample. The method is simple to operate, high in accuracy and capable of meeting the requirement for rapidly acquiring data in the on-situ detection.

The present invention relates to a threaded sealing grease with characteristics of rust resistance, wipe resistance and environmental protection, wherein the components comprise, by weight, 37-46.25% of synthetic oil type base grease, 3-3.75% of an anti-rust agent, 10-20% of copper powder, 10-20% of expanded graphite powder, 5-7.5% of calcium carbonate, and 15-22.5% of flake graphite powder. The present invention further relates to a preparation process of the threaded sealing grease with characteristics of rust resistance, wipe resistance and environmental protection, wherein the specific steps comprise base grease preparing, sealing material pretreatment, and sealing grease finished product preparing. According to the present invention, the component ratio of the threaded sealing grease is different from the component ratio of the traditional sealing grease, the lightweight calcium carbonate material and the graphite powder are added so as to provide good wipe resistance and good corrosion resistance, and only the copper powder is added while other heavy metals are removed under the premise of assurance of the threaded grease performance so as to reduce the risk of heavy metals on the environment, reduce the damage on the user health, and provide environmental protection.

A cigarette with tea smell is composed of tip filter, cotton thread in the center of tip filter, rolling paper, and tobacco shreds. It features that said cotton thread has been immersed in the solution of thiapolyphenol until it is saturated and the tea-smell additive is uniformly applied to tobacco shreds.

The invention discloses a full-automatic all-in-one machine for rolling moxa, which comprises a roll-up machine and a moxa feeding mechanism, wherein a roll stand is arranged at one end of a stand ofthe roll-up machine; a paper passing roller, a paper conveying roller, a gluing mechanism, a tamping mechanism and a cloth rolling mechanism are sequentially arranged on the top surface of the stand of the roll-up machine from one end of the roll stand; a strip rolling mechanism is arranged below the tamping mechanism on the bottom surface of the frame of the strip rolling machine; a sliding plateand a conveying belt for guiding moxa sticks are arranged below the strip rolling mechanism; the moxa feeding mechanism is arranged on one side of the strip rolling machine; the moxa feeding mechanism consists of a support frame, a large feed bin and a quantitative feeder. The full-automatic all-in-one machine is simple to operate and easy to use, reduces the labor intensity, saves the labor force, effectively utilizes the space and has a beautiful and elegant appearance.

The invention discloses a preparing method of a Chuzhou-chrysanthemum-aroma-enhancement cigarette filter tip. The preparing method includes the steps that nanometer titanium dioxide serves as a raw material, a titanium dioxide nanometer tube is synthesized with the hydrothermal method in a sodium hydroxide solution, then the titanium dioxide nanometer tube and a chitosan solution are mixed, hydrothermal treatment is carried out, chitosan is carbonized, and a chitosan carbon-titanium dioxide nanometer tube adsorption material is obtained; the chitosan carbon-titanium dioxide nanometer tube adsorption material and Chuzhou-chrysanthemum oil are fully mixed, the Chuzhou-chrysanthemum oil is loaded in the adsorption material, the product and Chuzhou-chrysanthemum dried powder obtained in the mode that residual Chuzhou-chrysanthemum slag of Chuzhou-chrysanthemum-oil extracting is dried and ground are mixed to be even, and a composite additive is obtained; the composite additive is evenly spread on filter stick tows, forming and processing are carried out, and the Chuzhou-chrysanthemum-aroma-enhancement cigarette filter tip is prepared. The cigarette filter tip prepared with the method has the excellent scorch reduction and damage reduction effects, and can have the aroma enhancement effect and the cigarette-smoking-taste improvement effect, the sensing requirements of consumers are met while damage to human body health is reduced, and meanwhile the Chuzhou-chrysanthemum-aroma-enhancement cigarette filter tip has the health-care effects of diminishing inflammation, decreasing internal heat, calming the nerves and assisting sleeping.

The invention belongs to the technical field of down jacket fabric processing equipment, and particularly relates to a seamless hot-pressing device for down jacket fabric. The device comprises a base, a guide column and a hot-pressing lifting support arranged on the guide column in a sleeving mode, the hot-pressing lifting support is driven by a telescopic air cylinder to ascend and descend, a fabric containing plate is arranged on the upper end face of the base, and a pressing plate is movably arranged at the position, corresponding to the fabric placing plate, of the hot-pressing lifting support through a hot-pressing adjusting mechanism; and the hot-pressing adjusting mechanism comprises a fixing plate fixedly connected with the hot-pressing lifting support. The down jacket fabric is attached through the hot-pressing technology, the pressing force and the pressing buffering stroke can be adjusted according to different hot-pressing requirements of different clothes, meanwhile, the pressing plate can be conveniently replaced through the fixing mechanism, the application scene and durability of the device are increased, and the device is simple in structure, high in stability, reasonable in design and convenient to industrial popularization and use.

The invention belongs to the technical field of corrosion prevention of thermal power plant equipment, and particularly relates to a corrosion inhibitor applied to an SCAL type indirect cooling systemand a chemical adding method of the corrosion inhibitor. The chemical adding method comprises two steps of preparation of the corrosion inhibitor and addition of the corrosion inhibitor into the indirect cooling system. The corrosion inhibitor and the chemical adding method are characterized in that the corrosion inhibitor is prepared from sodium borate, sodium silicate, zinc sulfate, sodium tripolyphosphate, sodium hexametaphosphate, sodium molybdate, fatty alcohol-polyoxyethylene ether (penetrant) and desalted water in a chemical adding tank, and the corrosion inhibitor is injected into theSCAL type indirect cooling water system through a metering pump. The corrosion inhibitor and the chemical adding method have the beneficial effects that after the corrosion inhibitor is added into the SCAL type indirect cooling system, the corrosion rate of carbon steel in the SCAL type indirect cooling system can be controlled to be smaller than 0.075 mm / a, and the corrosion rate of pure aluminum in the SCAL type indirect cooling system can be controlled to be smaller than 0.0075 mm / a; after the corrosion inhibitor is applied, the water quality control range of the system can be properly widened, and the water changing frequency is reduced; after the corrosion inhibitor forms a film, the shutdown corrosion rate of the system can be reduced; and the components of the corrosion inhibitor are environment-friendly and low in toxicity.

The invention provides a software control method for an I-bar welding robot. The software control method for the I-bar welding robot aims to solve the problems that an existing I-bar welding machine is low in automation degree, coating welding operation is inconvenient, and the work efficiency is low. According to the software control method for the I-bar welding robot, a system is programmed with the c programming language. The software control method for the I-bar welding robot is characterized by introducing and exporting of the closed-loop control PID algorithm and the welding parameter formula which is commonly used and the configuration state of a human-computer interface. According to the software control method for the I-bar welding robot, the welding full-automatic is achieved and the production efficiency is improved.

The invention provides a cutting device for nonferrous alloy metal rods, and relates to the technical field of nonferrous alloy machining. The cutting device for the nonferrous alloy metal rods comprises a base; cushion legs are fixedly arranged on the bottom of the base; the top of the base is welded to the bottom of a top plate through an electric telescopic rod; a rack plate is arranged on thebottom of the top plate; a motor is fixedly arranged on the top of the rack plate; and the output shaft of the motor is provided with a cutting blade through welding. According to the cutting device for the nonferrous alloy metal rods, two fixing plates are controlled to approach to each other or to depart from each other by the motor, so that two groups of opposite limiting wheels move to properpositions for limiting a metal rod; the phenomenon that the arm of a worker is affected by vibration which is generated when the metal rod is manually held for cutting is avoided; besides, the metal rod cannot be held firmly when being held manually, and easily deflects to affect cutting quality; and the limiting wheels are rotatable, so that the phenomenon that labor intensity of the worker is increased because of friction between the limiting wheels and the metal rod is avoided, and cutting work is more stable and labor-saving.

The invention discloses a composite shaving board. The composite shaving board comprises a board body, wherein the board body comprises a shaving sandwich layer which is mainly formed by distributing a rough shaving layer and a fine shaving layer in a staggered mode, a metal net layer is arranged between the rough shaving layer and the fine shaving layer, meshes of the metal net layer are filled with metal powder, vermiculite anti-flaming layers which are connected through a polymer glue layer are arranged on the upper surface and the lower surface of the shaving sandwich layer respectively, and the periphery of the board body is wrapped in a paraffin layer. The composite shaving board is simple in structure, easy to manufacture, resistant to water and fire, capable of insulating heat and preserving heat, high in strength, high in torsional property, capable of preventing radiation, environmentally friendly, firm in structure, resistant to abrasion, attractive, durable and the like and can be widely applied to various fields and occasions.

The invention relates to the technical field of road construction, and discloses a drilling device and drilling method for road and bridge municipal construction. The drilling device for road and bridge municipal construction comprises a base and a drill bit, wherein universal wheels are fixedly arranged at the four corners of the bottom of the base, a through hole is formed in the top of the base, and a box body is fixedly arranged at the top of the base; and a mounting plate is fixedly arranged at the top of the box body, a motor is fixedly arranged on one side of the mounting plate, an output shaft of the motor is fixedly connected with one end of a square rod, a square groove is formed in the top end of the drill bit, and the square rod is slidably connected with the square groove. The drilling device and drilling method for road and bridge municipal construction are reasonable in design, and the drill bit moves downwards at low speed while being driven to rotate at high speed, so that automatic drilling work is carried out, the working efficiency of drilling work is improved, and the uniformity of the drilling size is guaranteed; and dust generated by drilling is sucked into an air outlet barrel by driving fan blades to rotate, and the dust is filtered through a filter screen, so that health damage and environmental pollution caused by the dust are reduced.

The invention relates to a dust-free jaw crusher which comprises a jaw crusher body and a dedusting system. A static jaw plate is vertically arranged on the inner wall of one side of a cabinet of thejaw crusher body, a movable jaw plate is arranged in the cabinet and obliquely arranged on one side of the static jaw plate and is in transmission connection with a driving device which drives the upper end of the movable jaw plate to be close to or away from the static jaw plate for swinging, and a crushing chamber is arranged between the static jaw plate and the movable jaw plate; the dedustingsystem comprises a dustproof cover and a dedusting device, the dustproof cover is detachably mounted at the upper end of the crushing chamber, a feeding port is formed on one side of the dustproof cover, and a dedusting port is arranged on the dustproof cover and externally connected with the dedusting device through a pipeline. The dust-free jaw crusher has the advantages of being simple and reasonable in structural design, capable of effectively improving dust environment around the crusher and reducing damage to health of operating personnel and excellent in environment protection performance.

The invention discloses a using method of a numerical control laser cutting device. The numerical control laser cutting device includes a machine base, a moving crossbeam, a guarding device, a laser cutting head, an exhaust gas treatment device, a moving table, and a lifting device. The moving crossbeam is arranged above the machine base. The laser cutting head is arranged on one side of the moving crossbeam. The laser cutting head is provided with the guarding device in a sleeved mode. The guarding device comprises a connecting plate and a guarding cover. One side of the guarding cover is connected with the connecting plate. A laser cutting head trepanning is formed in the upper end of the guarding cover. The laser cutting head is arranged in the laser cutting head trepanning. The upper end surface of the moving crossbeam is provided with a sliding way. The sliding way is provided with a moving table. The moving table is provided with a moving motor. One side of the moving motor is provided with the exhaust gas treatment device and the lifting device. The exhaust gas treatment device is connected with the guarding cover. The lifting device is connected with the connecting plate. One side of the machine base is provided with a controller. The controller is connected with the moving motor and the laser cutting head.