58 results about "Caustic substance" patented technology

The utility model discloses a kind of plastic particles with good compression resistance effect and corrosion resistance, related to plastic particle technical field, comprising: outer protective shell and reinforcing ring, the outer surface inside of outer protective shell is fixedly installed with reinforcing ring, outer protective shell is located the outermost side of plastic particle, directly with outside environment contact, reinforcing ring is fixedly installed in the outer surface inside of outer protective shell, both cooperate with each other, initially build up the protection and support framework of plastic particle, the inside of reinforcing ring is installed with compression ring rib, through multilayer protection from outside to inside wearproof anticorrosive outer layer, antioxidant barrier layer, efficient anticorrosive additive layer etc., layer by layer, synergistically resist various corrosion medium, compared with the single protection of conventional plastic particle, greatly prolong the service life in corrosive environment, while sealing adhesive layer eliminates the hidden danger that corrosive substance invades from interlayer gap, further strengthens the protection effect.

The flange barrel with the anti-corrosion film structure comprises a barrel body, a base is arranged at the bottom of the barrel body, a lifting groove is formed in the center of the top of the base, a lifting containing plate is arranged at the top of the lifting groove, and a containing groove is formed in the center of the top of the lifting containing plate. The inner wall of the barrel body is fixedly connected with an anti-corrosion film layer, and a movable groove is formed in the position, close to the bottom, in the base. According to the flange barrel with the anti-corrosion film structure, the anti-corrosion film layer is fixedly connected to the inner wall of the barrel body, meanwhile, through the unique bottom structure design, the resistance of the flange barrel to ground corrosion is greatly improved, and in an industrial production site, when the flange barrel is placed on the ground where corrosive substances such as acid, alkali and salt possibly exist, the corrosion resistance of the flange barrel is greatly improved. The heightening plate at the bottom of the barrel body is clamped with the placing groove, so that the bottom of the barrel body is not in direct contact with the ground, and corrosive substances are prevented from directly corroding materials at the bottom of the barrel body.

The invention discloses a corrosion-resistant ventilation cabinet for scientific research experiments, and relates to the technical field of laboratory equipment, the corrosion-resistant ventilation cabinet comprises a cabinet body, a lifting sliding door is slidably connected to the upper part of the front side of the cabinet body, and a ventilation mechanism is arranged at the upper part in the cabinet body; the ventilation mechanism comprises two ventilation boxes fixedly connected to the inner walls of the two sides of the cabinet body and a neutralization liquid box fixedly connected to the top of the inner side of the cabinet body, first filter plates are fixedly connected to openings of the ventilation boxes, first motors are fixedly connected to the interiors of the ventilation boxes, and a cleaning mechanism is arranged in the center of the interior of the cabinet body. According to the invention, gas containing corrosive substances in the cabinet body is treated through the first filter plate, the air guide fan, the air guide pipe and the neutralizing liquid box, so that the problem that the gas containing the corrosive substances is inconvenient to discharge in the prior art is solved, and the interior of the cabinet body is cleaned through the transmission screw rod, the threaded sliding block, the sliding plate, the telescopic hose and the cleaning brush; the problem that the interior of a cabinet body is inconvenient to clean in the prior art is solved.

The utility model relates to an external UHPC steel pier anticorrosion structure, which comprises a steel pier, studs, an UHPC external structure layer and a built-in reinforcing mesh, the studs are welded on the outer surface of the steel pier, the UHPC external structure layer is arranged on the outer side of the steel pier, the reinforcing mesh is arranged in the UHPC external structure layer, and the reinforcing mesh is connected with the steel pier through the studs. The anti-corrosion purpose of the steel pier is achieved by wrapping the UHPC structural layer, the UHPC anti-seepage performance and durability are outstanding, the influence of corrosive substances on the steel pier can be well resisted, meanwhile, the structure construction is convenient and fast, the appearance quality is good, the anti-corrosion performance is outstanding, and meanwhile the site construction time is effectively shortened.

The utility model relates to the technical field of geotechnical engineering anchor cable support, and discloses a grouting hole sealing bag suitable for a miscellaneous fill stratum, which comprises a steel strand, a hole sealing bag body is arranged outside the right side of the steel strand, and an exhaust hole is arranged on the left side of the hole sealing bag body. And bag fixing clamping plates are arranged outside the left side and the right side of the hole sealing bag body correspondingly, a plurality of isolation supports are evenly arranged on the opposite sides of the steel strands, and a grouting assembly is arranged on the left side of the hole sealing bag body. According to the utility model, through the design of a multi-layer composite structure, the bag can well adapt to the complex soil body environment of a miscellaneous fill layer, effectively resist the influence of non-uniform deformation and corrosive substances, prolong the service life of the bag and improve the hole sealing quality; the sealing performance and the installation stability of the bag in a miscellaneous fill layer are further enhanced, the reliability of grouting and hole sealing of the anchor cable is ensured, and the safety and the stability of an anchor cable supporting structure of the whole geotechnical engineering can be improved.

The utility model relates to the technical field of chemical fertilizer production, and discloses a high-tower chemical fertilizer steam condensate recovery structure which comprises a high tower, a heat exchanger arranged on one side of the top end, and a refrigerant inlet, a heating medium outlet, an air inlet and an air outlet which are formed in the surface of the heat exchanger. According to the high-tower chemical fertilizer steam condensate recovery structure, through the arrangement of the heat exchanger, high-temperature steam heat generated in the chemical fertilizer production process can be effectively recovered, cyclic utilization of heat energy is achieved, the high-tower chemical fertilizer steam condensate recovery structure is used for preheating chemical fertilizer raw materials, and the energy utilization efficiency is remarkably improved; the contact area of air flow and the exhaust pipe is greatly increased, an efficient air cooling channel is formed and the temperature of exhaust gas is reduced through cooperation with the downward pressing effect of cold air flow in the cooling tower, automatic cleaning of the surfaces of the cooling fins and the exhaust pipe is achieved through the up-down sliding design of the cleaning ring and the absorbent cotton, the absorbent cotton can absorb condensate water and attachments, and the cooling effect of the cooling tower is improved. And long-term retention of corrosive substances is prevented.

This invention discloses a high-strength bearing housing, relating to the field of bearing housing technology. It includes an isolation boss, one end of which is fixedly fitted with a corrosion-resistant protective layer made of corrosion-resistant material. Reinforcing side plates, which enclose the corrosion-resistant protective layer, are fixedly fitted at both ends of the protective layer. Fastening rods, which are securely connected to the reinforcing side plates, are fixedly fitted inside the reinforcing side plates. The advantages of this invention are: by adding an isolation boss to the surface of the bearing housing, the corrosion-resistant protective layer is supported, forming a corrosion-resistant protective structure on the outside of the bearing housing. Simultaneously, the isolation cavity supported by the isolation boss forms a second layer of protection, reducing direct contact between corrosive substances and the bearing housing. Furthermore, the reinforcing side plates form a closed protective space within the corrosion-resistant protective layer, covering and protecting the bearing housing, making it less susceptible to corrosion from complex environments and improving the overall strength of the bearing housing.

The application discloses a PBI crosslinking modified PET composite film and a preparation method and application thereof, and relates to the technical field of battery separators. Through the benzimidazole repeating units in the PBI molecular main chain, physical entanglement and chemical crosslinking between PBI molecular chains and PET molecular chains occur in a melt blending process, a three-dimensional network structure is formed, the penetration of corrosive substances in electrolyte into the interior of PET material is effectively prevented, and the corrosion resistance of the PET material is improved; the modified PET material still has good melt flowability and processing performance, is suitable for existing PET processing equipment, and does not use toxic and harmful substances in the modification process, and meets the environmental protection requirements; the application further improves the electrolyte corrosion resistance, mechanical strength and thermal stability of the PET film by adding nano-aluminum phosphate and graphene in the PET master batch.

The application discloses a wellhead device for offshore oil exploitation with an anticorrosion function, and relates to the technical field of oil exploitation. The casing head is installed on the wellhead to provide support for the casing cross, the tubing head and the Christmas tree. The casing head, the casing cross, the tubing head and the Christmas tree are connected through the connecting assembly. The cleaning mechanism connected with the connecting assembly rotates along the flange axis with the flow of seawater, and the brush installed on the cleaning mechanism cleans the connecting part of the flange, so that the microorganisms which can produce corrosive substances are prevented from being adsorbed on the connecting part of the flange for a long time, and the corrosion caused by the adsorption of the microorganisms on the connecting part of the connecting assembly is reduced.

The invention discloses a discharge flue negative oxygen ion emission device for industrial waste gas treatment, relates to the technical field of negative oxygen ion emission devices, solves the technical problem that an electrode is directly exposed and is easily polluted in the existing technical scheme, comprises an emission cylinder, and is characterized in that the emission cylinder is arranged in a flue and / or at the side part of the flue; according to the flue gas emission device, the emission needle is driven to swing up and down by adjusting the linkage mechanism, and the device can adjust the emission angle according to the change of the flow speed in the flue. The radial component is increased to cover the central area at low flow speed, and the axial component is increased to utilize kinetic energy compensation at high flow speed, so that the negative oxygen ions can effectively cover the section of the flue under different working conditions. A physical protection barrier is provided for the emission needle, and the damage of smoke dust and corrosive substances to the electrode is reduced. And the corrosion-resistant and high-temperature-resistant coating is matched, so that the maintenance frequency of the equipment is obviously reduced.

The invention relates to a hydraulic support structural member anti-corrosion treatment method suitable for potassic salt ore, which comprises the following steps: S1, pretreatment; s2, loading an oxide ceramic precursor on the clean structural member, and heating and decomposing to form a compact barrier layer to obtain a primary structural member; the resistivity of the barrier layer is in the range of 1 * 10 < 6 >-1 * 10 < 9 > omega.cm; s3, coating the surface of the primary structural member with a coupling agent to obtain a secondary structural member; s4, the surface of the second-level structural part is coated with conductive putty, and a third-level structural part is obtained; and S5, anti-corrosion paint dry powder is electrostatically sprayed on the third-stage structural part, an anti-corrosion coating is formed through curing, and the hydraulic support structural part subjected to anti-corrosion treatment is obtained. The technical problems that in the prior art, a coating of a hydraulic support structural part is poor in protection effect under the corrosive environment with high permeability, corrosive substances can easily penetrate through the coating, and the adhesive force is reduced too fast in the using process are solved.

The utility model discloses a wear-resistant thermocouple which comprises a thermocouple body, the outer surface of the thermocouple body is provided with a buckle seat, the outer surface of the thermocouple body is provided with a thermocouple core, the lower surface of the buckle seat is provided with a first annular opening, and the inner surface of the first annular opening is provided with a sealing ring. And a connecting seat is arranged on the lower surface of the buckle seat. By arranging structures such as a buckle seat, a connecting seat, a buckle column, an L-shaped buckle, an inclined surface block, a sliding rod, a pressing plate, a wedge-shaped block and a spring, the wear-resistant sleeve can be integrally disassembled and replaced, so that the trouble of replacing the whole thermocouple when the wear-resistant sleeve is damaged and worn is avoided, the maintenance cost and the downtime are further reduced, and the working efficiency is improved. By arranging the sealing ring, the first annular opening and the second annular opening, corrosive substances in the external environment can be prevented from entering the interior through the joint of the wear-resistant sleeve and the thermocouple to be in contact with the galvanic couple core, so that the service life of the galvanic couple core is prolonged.

This invention discloses a sodium-ion battery cathode material prepared using cryogenic technology and its preparation method, relating to the field of sodium-ion battery technology. The cathode material, prepared using cryogenic technology, comprises a substrate and a coating covering the surface of the substrate. The substrate comprises the following components: 70-80 parts of positive electrode active material, 1-5 parts of conductive agent, 5-15 parts of binder A, and 30-45 parts of solvent A. The coating comprises the following components: 5-8 parts of conductive agent, 3-5 parts of binder B, 2-5 parts of corrosion inhibitor, 1-2 parts of transition metal salt compound, and 15-20 parts of solvent B. By introducing a corrosion inhibitor with a specific chemical structure combined with the coating design, a uniform and dense protective layer is formed on the electrode surface, effectively isolating it from electrolyte corrosion. The corrosion inhibitor core consumes corrosive substances through passivation and reversible redox reactions, significantly slowing down the interfacial corrosion rate, especially under long-term cycling and harsh environments.

According to the transformer, the packaging glue is injected into the cavity defined by the shell and the base, so that the base, the shell and the magnetic core wound with the primary coil and the secondary coil form the integrated structure, and the structure reduces gaps and loosening risks of traditional split connection through material fusion; on one hand, the overall size and component spacing of the transformer are remarkably reduced, and the space utilization rate is increased; on the other hand, the anti-vibration capacity is enhanced through the overall restraining effect of the colloid, and component displacement caused by mechanical excitation or electromagnetic force in the operation process is restrained; and meanwhile, dust, humid air and corrosive substances can be prevented from invading due to the compact characteristic of the packaging adhesive, so that the internal coil and the magnetic core are prevented from being eroded by environmental factors, and the structural stability and environmental adaptability of the transformer are comprehensively improved.

Some aspects of the disclosure relate to compositions for releasing a material clog. In some examples, the compositions include one or more release agents, such as a silicone material, one or more thickening agents, and one or more complexing agents. In certain aspects, the disclosure relates to non-hazardous compositions for releasing a material clog, for example compositions with limited amounts of or no amounts of caustic and / or alkaline material. In other aspects, the disclosure relates to methods for releasing a material clog by contacting a release composition and a clog for a contact time period, and / or pretreating plumbing component surfaces or plumbing component standing water with a release composition before formation and / or deposition of a clog.

The utility model discloses a high-pressure reaction kettle for wet oxidation. The high-pressure reaction kettle mainly comprises a reaction kettle body, a heating tank, a stirring device and a pressure control system, specifically, the reaction kettle body is designed to be of a cylindrical structure, the inner wall of the reaction kettle body is particularly coated with a corrosion-resistant material layer, and the material layer can effectively resist corrosive substances possibly generated in the chemical reaction process, so that the reaction kettle body is protected from being damaged; the heating tank is very elaborate in design, and the corrosion-resistant material layer is arranged on the inner wall of the reaction kettle body, so that corrosion of reactants to the kettle body can be effectively prevented, and the service life of equipment is prolonged; the heating tank covers the reaction kettle body and the feeding pipe, so that reactants can be quickly and uniformly heated, and the reaction efficiency is improved. The stirring device can ensure that reactants are fully mixed in the reaction kettle, so that the reaction uniformity and efficiency are improved; and the pressure sensor monitors the pressure in the reaction kettle in real time to ensure that the reaction process is carried out in a safe pressure range.

The utility model relates to the technical field of chemical reaction kettles, in particular to a multiple safety interlocking protection structure of a chemical reaction kettle. The reaction kettle comprises a reaction kettle tank body, the top end of the reaction kettle tank body is in threaded connection with a kettle cover, the upper surface of the kettle cover is provided with a feeding port, the bottom end of the reaction kettle tank body is provided with a discharging port, the upper surface of the kettle cover is provided with a rotating handle, a movable groove is formed in the rotating handle, an adjusting locking assembly is installed in the movable groove, and the top end of the kettle cover is provided with a supporting column. The top end of the supporting column is provided with a driving motor, and the sidewall of the supporting column is provided with an auxiliary assembly. According to the utility model, the double interlocking of kettle cover locking and driving motor starting is realized by adjusting the accurate matching between the locking component and the auxiliary component. The motor is effectively prevented from being started under the condition that the kettle cover is not locked, and the kettle cover is prevented from being accidentally opened due to vibration, pressure and the like generated in the stirring process, so that high-temperature, high-pressure and corrosive substances are prevented from splashing out, and the running safety of equipment is improved.

The utility model discloses a road surface maintenance device for road construction, which comprises support legs, moving wheels, a top plate, a push rod, a material box, a material pumping box and a discharge pipe, the bottoms of the support legs are fixedly connected with the tops of the moving wheels, the tops of the support legs are fixedly connected with the bottom of the top plate, and the rear side of the top of the top plate (3) is fixedly connected with the bottom of the push rod. According to the pavement crack filling device, the fan and the spray head are arranged, a large amount of air can be transmitted to the spray head through the guide pipe by utilizing the fan, and then the air can be blown out intensively by utilizing the spray head, so that dust in cracks can be blown out, and the pavement crack filling device is convenient for a user to adjust the position of the compression roller; the problems that a device for assisting in blowing away dust in cracks is not arranged in the existing pavement crack filling device, and the dust possibly contains some corrosive substances or impurities and can chemically react with the filling material, so that aging and deterioration of the filling material are accelerated, the service life of the filling material is shortened, and the overall pavement crack filling effect and the service life of a road are affected are solved.

The invention relates to the technical field of cable take-up and pay-off, in particular to a new energy charging pile cable take-up and pay-off device which comprises a charging pile, a wheel disc is rotationally arranged in the charging pile, a cable is wound on the outer side of the wheel disc, a gear A is rotationally arranged at one end of the wheel disc, and a guide pipe is arranged at one end of the gear A; a piston driven by a gear A slides in the guide pipe, one end of the guide pipe is communicated with a liquid storage tank, and the other end of the liquid storage tank is communicated with a sponge. According to the invention, rainwater and dew or car washing splashed water are directly prevented from permeating into the cable through an air-dried waterproof agent, so that short circuit or electric leakage of a copper wire in the cable is effectively prevented, and charging safety is guaranteed; the waterproof agent can isolate moisture, dust and external corrosive substances in air, slow down aging and cracking of the cable sheath and reduce maintenance cost caused by cable damage, and meanwhile, the waterproof agent is attached to the surface of the cable to promote lubrication of the cable, reduce abrasion between the cable and other parts when the cable is pulled out and further protect the cable sheath.

The utility model discloses a rectangular tube inner wall high-salt sediment removal device in the technical field of rectangular tube inner wall cleaning, which comprises a liquid conveying main tube, a tube head cleaning component is mounted at one end of the liquid conveying main tube, the tube head cleaning component comprises a connecting base, a sediment removal part is arranged in the connecting base, and the sediment removal part comprises a supporting piece. According to the technical scheme, the tube head cleaning assembly is additionally arranged at one end of the liquid conveying main tube, high-salt sediments on the inner wall of the rectangular tube can be effectively removed through cooperative use of the deposit removing component and the inner wall scraping pieces, and the inner wall scraping pieces are arranged on the periphery of the outer wall of the supporting piece. The pipe head cleaning assembly comprises a connecting base and an accumulated matter removing component arranged in the connecting base, the accumulated matter removing component is supported through a supporting piece, a plurality of groups of inner wall scraping pieces distributed in a circumferential array mode are arranged on the outer wall of the supporting piece, and when the inner wall scraping pieces move on the inner wall of the pipeline, high-salt sediments attached to the inner wall can be scraped; and the pipeline is prevented from being damaged by corrosive substances.

The utility model discloses a corrosion resistance test device for a ball body of a ball valve, belongs to the technical field of test equipment, and provides the corrosion resistance test device for the ball body of the ball valve, which can enable less corrosive gas to overflow when a tested object is taken and placed, and comprises a test box, an inner probing arm is inserted into the side wall of the test box, and an outer probing arm is inserted into the inner probing arm. One end, located at the test box, of the inner probing arm is suitable for installing a test body of a ball valve ball body, a plug cover is further matched on the outer side face of the test box, the top of the test box is open and is provided with a sealing cover, and a temperature detector, a humidity detector, a PH value detector and an electrical bar are fixedly connected to the sealing cover. A smaller rotation stopping through hole structure is formed in the side wall of the test box and matched with an inner probing arm structure capable of being tightly attached, a tested object is placed at the end, capable of stretching into the test box, of an inner probing arm, the amount of corrosive gas overflowing in the process of taking and placing the tested object can be effectively reduced, and the test efficiency is improved. Therefore, the concentration of corrosive substances in the test environment is kept stable for a long time, and the test accuracy is improved.

The invention discloses an anti-corrosion protective coating containing a film layer structure and a preparation method of the anti-corrosion protective coating, and relates to the technical field of protective coatings. The anti-corrosion coating sequentially comprises an anti-corrosion coating bottom coating; the bonding layer is arranged on the upper surface of the anticorrosive paint bottom coating; the film layer covers the upper surface of the bonding layer, and the surface of the film layer is treated; the first corrosion-resistant and weather-resistant coating is coated and cured on the upper surface of the film layer; and the second corrosion-resistant and weather-resistant coating is arranged on the upper surface of the first corrosion-resistant and weather-resistant coating. According to the anti-corrosion protective coating containing the film layer structure and the preparation method of the anti-corrosion protective coating, the protective coating has excellent compactness, corrosive substances such as water, oxygen, sulfur dioxide and sulfur trioxide can be effectively separated from protected metal and non-metal materials, the possibility of corrosion is reduced from the source, and the service life of the protective coating is prolonged. Compared with a traditional anti-corrosion coating which is formed by'maze blocking 'only by adding glass flakes, superfine particles and the like, the anti-corrosion effect is more thorough.

This utility model relates to the field of cardboard box cutting and discloses a positioning mechanism for a cardboard box cutting device. It solves the problem that cardboard box cutting is typically a large-scale production operation, where the pressure plate comes into contact with a large number of cardboard boxes during production, resulting in rapid residue of corrosive substances. If manual cleaning is used periodically, it requires significant manpower and time costs, increasing production costs and causing a substantial decrease in production efficiency due to downtime for cleaning. The positioning mechanism for a cardboard box cutting device includes a base, a first support plate disposed above the base, a first cylinder fixedly connected to the upper surface of the first support plate, and a first air rod fixedly connected to the output end of the first air cylinder. A second air cylinder pushes a cleaning plate along a guide rod. Through the cooperation of the first and second guide grooves, the cleaning plate moves horizontally first and then vertically, thereby automatically removing residual dirt from the cutting blade, keeping the pressure plate clean, and saving manpower.

The utility model relates to the technical field of fans, and discloses a novel fan structure which comprises a fan frame, a fan cover and a fan cover. A first protruding ring body and a second protruding ring body are arranged on the end face of the mounting base, and a first groove used for being filled with grease is formed between the first ring body and the second ring body; the fan blade comprises a fixed seat, a second blade and a rotating shaft; a third ring body, a fourth ring body and a fifth ring body which are protruded are arranged at the bottom of the mounting space, a second groove is formed by the third ring body and the fourth ring body, and a third groove is formed by the fourth ring body and the fifth ring body; and when the fan blades are assembled on the fan frame, the fourth ring body is arranged in the first groove, the first ring body is arranged in the second groove, and the second ring body is arranged in the third groove, so that an oil seal structure is formed. According to the utility model, external liquid or gas salts or corrosive substances are prevented from entering the bearing part of the fan, so that the service life of the fan in a specific severe environment is prolonged.

The utility model discloses a quick-mounting stainless steel single-clamping pipe fitting meeting the European standard, which comprises a connecting pipe, and a mounting seat is fixedly mounted at the upper end of the connecting pipe. Through cooperation of the fastening ring, the connecting clamping plate and the fastening bolt, connection and fixation of the pipe fitting can be rapidly achieved, compared with a traditional pipe fitting installation mode, the installation efficiency is greatly improved, the installation time and the labor cost are saved, a multiple sealing structure is formed through arrangement of the waterproof sealing ring, the rubber filling pad and the auxiliary sealing ring, and the sealing effect is good. Liquid or gas leakage is effectively prevented, the sealing performance of a pipeline system is ensured, the strict requirement of European standard for pipe fitting sealing is met, the waterproof layer, the anti-rust coating and the anti-corrosion reinforcing layer outside the connecting pipe can effectively resist external moisture, corrosive substances and oxidation, the service life of the pipe fitting is prolonged, and the service life of the pipe fitting is prolonged. Therefore, the pipe fitting is suitable for various complex use environments and meets the requirements of European standards on the durability of the pipe fitting.

A variable displacement compressor main shaft swash plate comprises a main shaft and a rotating arm, the main shaft is in threaded connection with the rotating arm through a bolt, the outer wall of the rotating arm is rotationally connected with a first connecting pin, the outer wall of the first connecting pin is rotationally connected with a connecting plate, the inner wall of the connecting plate is rotationally connected with a second connecting pin, and the outer wall of the rotating arm is connected with a protection mechanism. An external bolt penetrates through the connecting ring to be fixed to the rotating arm in a threaded mode, so that the telescopic sleeve made of rubber is installed on the rotating arm, the rotating arm and the telescopic sleeve are pushed into the main shaft from the end, the outer wall of the reset spring is wrapped by the telescopic sleeve, and the telescopic sleeve plays a role in protecting the exterior of the reset spring; the reset spring can be isolated from high-humidity or corrosive substances, and noise possibly generated by friction or vibration during compression or extension is reduced.

The utility model relates to the technical field of sewage phosphorus treatment, in particular to an anti-corrosion octagonal sealing dephosphorization filter cloth device which comprises an octagonal filter box, a cover plate is arranged at the upper end of the octagonal filter box, a scraper mechanism is fixedly installed in the middle of the lower end of the cover plate, the scraper mechanism comprises a hollow sleeve, the scraper mechanism is located in the middle of the octagonal filter box, and the hollow sleeve is fixedly connected with the octagonal filter box. The hollow sleeve is fixedly installed in the middle of the lower end of the cover plate, a rotating cylinder is slidably clamped to the middle of the hollow sleeve, a guide groove is formed in one side of the rotating cylinder, the lower end of the rotating cylinder penetrates through the hollow sleeve to be fixedly provided with an extension rod, and a plurality of connecting rods are evenly and fixedly installed on the periphery of one end of the extension rod; and one end of each connecting rod is fixedly provided with an arc-shaped scraping plate. The octagonal dephosphorization filter cloth device solves the problem that the inner wall of the octagonal dephosphorization filter cloth device is corroded by the synergistic effect of phosphorus and other corrosive substances in sewage in the operation process due to the fact that a traditional octagonal dephosphorization filter cloth device cannot realize self-cleaning.

The invention discloses a biomass-based graded porous carbon material and a preparation method and application thereof, and the preparation method comprises the following steps: weighing anhydrous potassium carbonate and a template agent, fully grinding and mixing, adding deionized water, and stirring until the materials are completely dissolved; weighing a biomass material, adding the biomass material into the obtained solution, heating in an oil bath to remove moisture, and continuously stirring in the process; carrying out vacuum drying on the collected product until the moisture is completely removed to obtain a solid precursor, and grinding the solid precursor into uniform powder; introducing argon into the powder for pyrolysis, preserving heat, and cooling to room temperature after the pyrolysis is finished; and stirring the obtained product in an HCl solution to completely remove the template, carrying out suction filtration to remove the solution, repeatedly washing the solid product until the pH value of the filtrate is equal to 7, collecting the solid product, and carrying out vacuum drying. Directional preparation of different pore intervals is achieved, directional regulation and control of micropores and mesopores are achieved, the pyrolysis temperature is lower, the activation effect is more controllable, corrosive substances do not exist, the requirement for equipment is lower, and the technology is simpler.

The utility model provides a handle, relates to handle field, including handle body, rubber belt and mounting groove, the top of handle body both sides is provided with two groups of internal groove, inside the internal groove is provided with the chute block, the chute block is provided with the rubber belt through the chute, one end of the rubber belt is provided with the sealing piece, the bottom of the sealing piece is provided with the waterproof ring, and the mounting groove is provided with the waterproof ring. Mounting grooves are formed in the two sides of the handle body, and sealing rings are arranged at the bottoms of the interiors of the mounting grooves, bolt gaps can be sealed through the sealing rings after bolts are mounted, the gaps between the bolts and the handle body can be filled with the sealing rings, the tightness of bolt connection is improved, and the service life of the bolts is prolonged. The bolt can be prevented from loosening due to vibration or external force in the using process, the overall stability of the handle is improved, the sealing ring can prevent corrosive substances from entering gaps of the bolt, and the corrosion risk of the bolt is reduced.