148results about How to "No clogging" patented technology

The present invention belongs to the technical field of evaporative condensers, and is particularly an evaporative condenser with multi-stage heat exchange, comprising a shell, an air intake grille is provided on the inner walls of the shell, an evaporative heat exchange coil, a spray component and a precooling heat exchange coil are provided inside the shell, the spray component is located above the evaporative heat exchange coil, the precooling heat exchange coil is located above the spray component, and the precooling heat exchange coil is connected to the evaporative heat exchange coil, and an induced draft fan is provided on the top of the shell. The present invention can scrape and collect impurities attached to the inner wall of the filter cartridge through a scraping and collecting mechanism that moves up and down and rotates, and can make cooling water into a vortex from outside to inside through a recoil mechanism that moves up and down and rotates, and the filter cartridge is recoiled by the vortex, and the impurities flushed down can be collected by the scraping and collecting mechanism, so as to ensure the cleanliness of the circulating water sprayed by the spray component, so that it will not cause clogging of the spray component and will not cause damage to the evaporative heat exchange coil.

The invention provides a batch straight pipe outer wall spraying device with a water-based paint recycling function. The batch straight pipe outer wall spraying device comprises a sealed cabin, a spraying mechanism, a drying mechanism, a liquid supply mechanism, a recycling mechanism and a numerical control module. The spraying mechanism and the recycling mechanism are both arranged in the sealed cabin, and the recycling mechanism communicates with the spraying mechanism; the spraying mechanism comprises a spraying rod and a centrifugal roller, a to-be-sprayed pipe fitting is installed in the spraying direction of the spraying rod through pipe fitting fixing assemblies, and the pipe fitting fixing assemblies are distributed on the inner wall of the centrifugal roller in an arc shape; the drying mechanism is used for drying a to-be-sprayed pipe fitting, and the liquid supply mechanism is connected with the spraying mechanism and the recycling mechanism; the numerical control module is in signal connection with each mechanism; by means of the spraying mechanism, the drying mechanism and the recycling mechanism, the spraying, recycling and drying integrated function is achieved, the pipe fittings are subjected to batch high-quality spraying, meanwhile, coating recycling is achieved, the situation that the surrounding environment is polluted due to the fact that the coating escapes is prevented, and the production efficiency is greatly improved.

The invention relates to the technical field of filtered water treatment, in particular to an aeration filtered water treatment device which comprises a water aeration tank, an air compressor fixed on a sewage aeration tank and a cross-shaped communicating pipe fixed in the sewage aeration tank, and the air compressor is communicated with the cross-shaped communicating pipe through a pipeline; the buoy monitoring mechanism is arranged in the sewage aeration tank, the buoy monitoring mechanism comprises a sealing shell, a micro water pump is fixed on the bottom wall of the sealing shell, the input end of the micro water pump is communicated with an L-shaped pipe, and a thermistor is fixed in the L-shaped pipe. By virtue of a pressure sensor and a thermistor in the buoy monitoring mechanism, the sewage condition in the sewage aeration tank can be monitored in real time, so that microorganisms in the sewage aeration tank have sufficient oxygen for metabolism, the decomposition speed of organic matters in the sewage is accelerated, and the sewage treatment efficiency is improved. And the rotating speed can be automatically adjusted by the protective lantern ring and the protective frame according to the sewage content in the sewage aeration tank.

The present invention discloses an ambient air constant-current automatic sampling system and a sampling method thereof. The system includes a vacuum sampling tank, a buffer container and a switching valve. The buffer container is respectively connected to the vacuum sampling tank and the atmospheric environment through the switching valve. Through the switching control of the switching valve, the buffer container is alternately connected to the atmospheric environment and the vacuum sampling tank to achieve the pressure balance of the sampled gas. The present invention also discloses a constant-current ambient air sampling method. The present invention breaks the foreign technical monopoly on high-precision atmospheric constant-current sampling devices, ensures the accuracy of atmospheric sampling flow control, ensures the inertness of the overall gas flow path, has flexible flow control and adjustment methods, uses commonly used industrial mass-produced devices and materials, realizes consumable-free and easy maintenance, and constructs an economical and efficient fully automatic ambient air constant-current automatic sampling system, contributing to the country's atmospheric environment monitoring and governance.

The invention discloses a flue gas cooling treatment system, and relates to the technical field of flue gas cooling treatment. The device comprises a cooling and dedusting tower and a pretreatment tower, wherein the top of the cooling and dedusting tower is fixedly connected with a smoke pipe. The cleaning assembly and the circulating cooling assembly are arranged, after flue gas makes contact with washing liquid, large-particle dust and the washing liquid can make contact with a filter plate according to the gravity effect, the large-particle dust stays on the surface of the filter plate, the washing liquid falls on a drainage plate after being filtered, and therefore the large-particle dust can be effectively removed. At the moment, the circulating cooling assembly is started to operate to quickly cool the water washing liquid, the water washing liquid flows into the connecting water pipe again and is sprayed out through the spraying piece, so that cooling and recycling of the water washing liquid are achieved, waste of water resources and environmental pollution are reduced, and the water treatment cost of enterprises is reduced; and the surface of the filter plate is circularly cleaned, so that blockage caused by accumulation of large-particle dust on the filter plate is avoided.

The utility model discloses a preparation device for high-viscosity hydroxypropyl starch ether, which belongs to the technical field of chemical equipment, aims to solve the problem that the adding speed of raw materials cannot be adjusted according to the reaction rate, and comprises a reaction kettle, supporting legs are fixedly mounted at the bottom of the reaction kettle, and an air adding device is fixedly mounted on the right side of the top of the reaction kettle. A feeding mechanism is arranged on the left side of the top of the reaction kettle, and an adjusting mechanism is mounted on the feeding mechanism; according to the utility model, through the arrangement of the adjusting mechanism, when starch raw materials are added into the reaction kettle, the adding speed of the starch raw materials can be adjusted according to the specific reaction process in the reaction kettle, so that the reaction speed of the starch raw materials in the reaction kettle is improved, the starch raw materials are fully reacted, and the product quality is further improved; in the process of adding the raw materials into the reaction kettle, the adding speed of the raw materials can be adjusted, meanwhile, blockage can be avoided when the raw materials are added, and thus the smooth completion of the reaction is guaranteed.

The utility model discloses a mixing reaction kettle for producing white carbon black, which comprises a base, a reaction kettle body arranged at the upper end of the base, a flange arranged at the upper end of the reaction kettle body, a top cover arranged at the upper end of the flange, a motor arranged at the upper end of the top cover, and a rotating rod arranged at the output end of the motor, two connecting rods are fixedly connected to the outer side of the rotating rod, vertical rods are arranged at the lower ends of the two connecting rods, scrapers are arranged on the side walls of the two vertical rods, a conveying cutter is arranged at the lower end of the rotating rod, the lower end of the reaction kettle body communicates with a discharging port, and the lower end of the conveying cutter extends into the discharging port. According to the structure, the vertical rod is matched with the scraping plate, so that the vertical rod drives the scraping plate to rotate in the rotating process, the inner wall of the reaction kettle body can be cleaned by utilizing the scraping plate, material residues are avoided, and the discharge port can be prevented from being blocked when materials are discharged by utilizing the conveying knife.

The utility model discloses a mulberry leaf cutting machine which comprises a machine frame, and a transmission mechanism, a cutting mechanism, a belt conveyor and a spray washing mechanism are arranged in the machine frame. The belt conveyor is arranged above the cutting mechanism, the transmission mechanism is in transmission connection with the cutting mechanism, and the transmission mechanism is in transmission connection with the belt conveyor; the cutting mechanism comprises a transverse cutter set and a longitudinal cutter set, and the transverse cutter set and the longitudinal cutter set are meshed with each other. And the spray-washing mechanism comprises an air compressor, an external spray-washing mechanism and an internal spray-washing mechanism. The transverse cutter set and the longitudinal cutter set are matched with each other for simultaneous cutting, secondary cutting is not needed, meanwhile, the blade distance can be adjusted, and therefore cutting of mulberry leaves of different sizes is achieved, and the mulberry leaf cutting efficiency is high; cutting is relatively stable, loss of the mulberry leaves is reduced, nutrition of the mulberry leaves is effectively reserved, and water loss is reduced.

The utility model relates to the technical field of disc type centrifugal machines, and discloses a disc type centrifugal machine facilitating deslagging. Comprising a centrifugal machine body, a liquid discharging pipeline and a slag discharging pipeline are arranged on the outer surface of the centrifugal machine body, and an anti-blocking assembly and a cleaning assembly are installed on the outer surface of the centrifugal machine body; the anti-blocking assembly comprises two first air cylinders installed on the outer surface of the centrifugal machine body, the right ends of the two first air cylinders are jointly connected with a first movable plate, and a motor is installed on the right side face of the first movable plate. Waste liquid and waste residues can be output through the arranged liquid discharging pipeline and the arranged residue discharging pipeline respectively, the arranged anti-blocking assembly is utilized, the motor drives the rotating rod and the spiral conveying blade to rotate, the spiral conveying blade extends into the residue discharging pipeline, the effect of assisting in residue discharging can be achieved, the waste residues in the spiral conveying blade can be rapidly and evenly discharged outwards, and the residue discharging efficiency is improved. And the accumulated waste residues are not easy to influence the operation, and the effect is better.

The utility model discloses a falling film evaporator with a good film distribution effect, which relates to the technical field of falling film evaporators and comprises an evaporator body, a connecting flange is arranged at the upper end of the evaporator body, a top cover is arranged at the upper end of the connecting flange, a pull plug is arranged at the upper end of the top cover, and a plurality of groups of fixing bolts are arranged on the inner side of the top cover. A plurality of sets of connecting pipes are arranged on the outer surface of the lower end of the top cover, arc-shaped limiting check blocks are arranged on the outer surfaces of the lower ends of the connecting pipes, an upper partition plate and a lower partition plate are arranged on the inner side of the evaporator body, and a plurality of sets of heat exchange pipes are arranged between the upper partition plate and the lower partition plate. According to the falling film evaporator with the good film distribution effect, the feed liquid enters the falling film evaporator through the feed liquid inlet through the arranged arc-shaped limiting check block, and due to the structure of the arc-shaped limiting check block, the feed liquid continuously flows down from the inner wall of the heat exchange tube in a film shape along the edge of the bottom of the arc-shaped limiting check block, so that subsequent evaporation and concentration are facilitated.

The utility model relates to a water -based paint multifunctional heat preservation bucket belongs to sand casting technical field to solve the problem that the existing sand casting production, because of winter environmental temperature is too low to lead to the performance of coating weakening, there is the problem of poor sand core dip coating quality and the decline of casting yield. The present application includes the barrel body, heating assembly and temperature control assembly, the inside of barrel body is equipped with the inner bucket to form the container cavity, the heating assembly includes heating water tank and circulating water pipe, heating water tank is equipped with heating part and water pump, circulating water pipe is installed in the inner bucket, and it is equipped with two connecting ports connected with heating water tank, the temperature control assembly includes inductor and controller, the inductor is installed in the inner bucket and heating water tank respectively, and inductor, heating part and water pump are electric connection with controller respectively. The heat preservation bucket of the present application can realize the coating heating preservation and coating stirring in the barrel, will not reduce the performance of coating, improve sand core coating quality and casting yield.

The utility model discloses a device for lapping two mutually perpendicular belt conveyors. The two mutually perpendicular belt conveyors are respectively a first belt conveyor and a second belt conveyor. The device comprises a heightening conveying frame and a supporting bracket, the heightening conveying frame is obliquely arranged, one end of the heightening conveying frame is close to a first belt conveyor, and the other end of the heightening conveying frame continuously inclines upwards and is close to a second belt conveyor; the supporting bracket is located between the heightening conveying frame and the second belt conveyor, and an unloading roller and an unloading arm are installed on the supporting bracket. According to the utility model, only the heightening transportation frame and the supporting bracket need to be added, no extra power equipment needs to be added, the transportation cost is greatly reduced, and the unloading roller and the unloading arm of the first belt conveyor are disassembled during use and then are mounted on the supporting bracket; and the conveying belt is connected with the belt of the first belt conveyor, so that the coal of the first belt conveyor can be unloaded to the second conveyor.

This application relates to the field of tail gas absorption technology, specifically disclosing a tail gas absorption device for phenothiazine production. The pretreatment mechanism in this application can induce sublimation of phenothiazine microcrystals in the tail gas through multiple stages, allowing the microcrystals to grow sufficiently to a collectable size before entering the collection zone. Then, a multi-stage blade collection mechanism progressively adheres and collects the grown microcrystals, achieving efficient recovery of the phenothiazine microcrystals. Simultaneously, an absorption tower is set up to absorb hydrogen sulfide from the collected tail gas with alkaline solution, and an activated carbon adsorption tower is set up to deeply purify residual hydrogen sulfide and volatile organic compounds. This forms a complete treatment chain with graded treatment and each stage performing its specific function, effectively solving the problem of blockage caused by microcrystals directly entering the absorption tower in existing technologies, while also achieving the recycling of high-value products.

The utility model discloses an automatic sampler for feed-grade granular calcium hydrophosphate. The automatic sampler for feed-grade granular calcium hydrophosphate comprises a gear motor, a rack and a sampling hopper, the speed reducing motor is mounted on the rack; the rack is erected above the belt; a gap is formed between the bottom end of the sampling hopper and the top surface of the belt; the gear motor is in driving connection with the sampling hopper; the sampling hopper rotates around an output shaft of the speed reducing motor. According to the automatic sampler, uniform material taking of the whole belt section material can be realized, non-uniform material taking is prevented, so that the representativeness of the taken sample is ensured, and when the automatic sampler is used for sampling feed-grade granular calcium hydrophosphate, the sample is not blocked when being transferred to a sample box.

The utility model discloses a novel centrifugal dust removal unit which comprises a gas-solid separation shell, a gas-solid separation chamber is arranged in the gas-solid separation shell, a lower shell is installed at the lower end of the gas-solid separation shell, a gas inlet and a dust discharge port are formed in the lower shell, a gas purification shell is arranged on one side of the gas-solid separation shell, and a gas outlet is formed in the other side of the gas purification shell. A gas purification chamber is arranged in the gas purification shell, a gas outlet is formed in the gas purification chamber, a tail supporting bearing and a head supporting bearing are installed on the side wall of the gas-solid separation chamber and the side wall of the gas purification chamber respectively, transmission negative pressure cylinders are arranged on the tail supporting bearing and the head supporting bearing, a motor base plate is installed on the gas-solid separation shell, and a motor is installed on the motor base plate. The utility model relates to the technical field of material recovery and gas-solid separation, the rotary filter disc rotates at a high speed to generate centrifugal force, and under the action of the centrifugal force, an attachment material layer gradually slides to the outer edge of the filter disc and finally is separated from the filter disc to complete the ash cleaning process.

The application relates to the field of sewage pumps, in particular to a novel flow control submersible sewage pump, which comprises a pump body, a rotating shaft arranged in the pump body and an impeller fixedly installed on the rotating shaft, and the bottom end of the pump body is fixedly connected with a sealing cylinder; the bottom end of the sealing cylinder is provided with a screening and dividing assembly, the screening and dividing assembly is used for screening and preliminary dividing of garbage in sewage, and the screening and dividing assembly comprises a screening cylinder fixedly connected with the bottom end of the sealing cylinder, and a dividing cutter capable of moving up and down to cut is arranged in the screening cylinder. The screening and dividing assembly is arranged, so that when the sewage pump is used, the screening cylinder can screen garbage, garbage with a larger size cannot enter the screening cylinder, garbage that can enter the screening cylinder can stay in the screening cylinder for a short time, the garbage is preliminarily divided by the rotating dividing cutter, the size of the garbage is reduced, the pressure of subsequent crushing treatment of the garbage is reduced, and the garbage is conveniently discharged subsequently.

The utility model discloses a water conservancy project gate board with filter function, including gate and filter mechanism, gate: its front side middle lower side is equipped with equipment mounting panel, filter mechanism: it includes chute, sliding seat, connecting rod, fixed base, filter frame and grating, the chute is opened in the front side middle part of equipment mounting panel, and the inside sliding connection of chute has sliding seat, and the inside rotary connection of sliding seat has connecting rod, and the front end rotary connection of connecting rod has fixed base, and the front side rotary connection of gate has filter frame, and the upper side wall of filter frame is equipped with the grating of uniform distribution, and the lower side wall rear side of filter frame is fixedly connected with the upper surface of fixed base, filter mechanism still includes first screw rod, first screw rod is rotatably connected in the inside of chute, and the outer thread surface of first screw rod is connected with the middle part screw thread connection of sliding seat, this water conservancy project gate board with filter function, and operation is very simple.

The utility model relates to a casing pipe anti-abrasion device which comprises a casing pipe, a casing pipe anti-abrasion ring, a welding clamping sleeve, a first tight fit clamping hoop and a second tight fit clamping hoop, the first tight fit clamping hoop and the second tight fit clamping hoop which are detachable are arranged at the two ends of the casing pipe respectively, and the casing pipe anti-abrasion ring and the welding clamping sleeve are inserted in the middle of the casing pipe in a penetrating mode. The casing pipe anti-abrasion ring is made of hard alloy materials, the casing pipe anti-abrasion ring is in sliding fit with the casing pipe, friction between the casing pipes can be effectively prevented, abrasion of the casing pipes is reduced, the overall service life of the casing pipe anti-abrasion ring is prolonged, and the second tight fit clamp, the casing pipe, the first tight fit clamp and the casing pipe are connected in a sliding fit mode. The welding clamping sleeve matching part and the welding clamping sleeve matching part are in close fit, the sleeve can be fixed in the middle of the sleeve, the sleeve is prevented from being excessively abraded, the welding clamping sleeve is welded to the welding clamping sleeve matching part, and the sleeve anti-abrasion ring is tightly fixed to the sleeve.

The utility model discloses a polypropylene raw material storage device which comprises a first tank body and a second tank body, a supporting frame is installed on the lower portion of the first tank body, a concentric-square-shaped groove is formed in the opening end of the first tank body, a concave frame is installed on the lower portion of the second tank body, and a concentric-square-shaped inserting plate is installed at the opening end of the second tank body. A feeding pipe and a guide cylinder fixedly penetrate through the far-away surfaces of the first tank body and the second tank body, a conical block is installed on the side wall of the supporting frame, concave seats are installed on the front end face and the rear end face of the interior of a concave frame, guide rollers are installed in the two sets of concave seats through bearings, a through hole is formed in the inner wall of the concave frame, and a through hole is formed in the inner wall of the concave frame. And a mounting screw rod is mounted on the side wall of the conical block. The polypropylene raw material storage device has the advantages that the supporting frame and the concave frame are adopted, the supporting frame and the concave frame are arranged, a guiding structure is arranged, splicing of a tank body structure can be completed conveniently in a labor-saving mode, and convenience is brought to installation of the polypropylene raw material storage device.

The invention relates to the technical field of sewage treatment, and provides filler of porous material coupled magnesium powder as well as a preparation method and application of the filler. The filler for coupling the porous material with the magnesium powder comprises 40-60 parts by mass of magnesium, 20-35 parts by mass of a porous material, 5-20 parts by mass of an inorganic carbon source and 5-10 parts by mass of an adhesive. The porous material coupled magnesium powder filler provided by the invention can be used for treating sewage with low carbon-nitrogen ratio, has a good nitrate-nitrogen treatment effect, and solves the problems of high cost and easy channeling or mineralization of the filler.

The utility model discloses a roadbed with a drainage structure, which comprises an asphalt layer, a foundation is arranged at the bottom of the asphalt layer, drainage grooves are arranged on two sides of the foundation, the upper surfaces of the drainage grooves are aligned with the edge of the asphalt layer, a plurality of drainage covers are arranged at the upper ends of the drainage grooves, and drainage holes are formed in the drainage covers. The drainage cover is provided with a plurality of drainage seams communicated with the interior of the drainage groove, the drainage cover is connected with a cleaning mechanism acting on the drainage cover, and the cleaning mechanism is composed of a movable plate, seam cleaning plates and a top cleaning plate. A driving mechanism is controlled to start through an external signal controller, so that a movable plate reciprocates below the drainage cover, a joint cleaning plate can clean sundries in the drainage joint, and a top cleaning plate can clean sundries on the upper surface of the drainage cover, so that the drainage cover cannot be blocked in rainstorm weather, and the situation that accumulated water on a road cannot be drained is avoided.

This utility model discloses a mixing and grading device for high-purity graphite processing, relating to the field of high-purity graphite processing technology. It includes a base, a screening tank on top of the base, a tank door on one side of the screening tank, and two mounting rails on both the inner wall of the screening tank and the tank door. Two mounting shells are installed inside the screening tank. This utility model uses a vibration motor to vibrate the screening tank. The graphite material on the top screen is gradually seeped downwards through the mesh openings due to the vibration. Larger particles of graphite are trapped on the top screen, while smaller particles are trapped on the second screen. Powdered graphite material on the screens seeps through the mesh openings of both screens into a collection frame for collection and storage. Removing the mounting shells from the mounting rails allows for cleaning of the screens, ensuring no graphite material clogs the mesh openings and guaranteeing efficient subsequent screening.

The utility model belongs to the technical field of instant noodle seasoning bag smashing, and particularly relates to an instant noodle seasoning powder raw material smashing machine with an anti-blocking function, which comprises a processing box and further comprises a fixing plate movably mounted on the surface of the processing box, and screws are mounted in the fixing plate in a penetrating manner. Roll shafts are movably installed at one ends of the fixing plates, motors are movably installed on the surfaces of the roll shafts, oil holes are formed in the tops of the roll shafts in a penetrating mode, the roll shafts can be fixed to the surface of the machining box through the fixing plates and then fixed through screws, and after the fixing plates are fixed, the roll shafts can be driven to rotate by starting the motors. During long-term use, when the roll shaft needs to be oiled, the screws are detached, the fixing plates are taken down, then the connection position of the roll shaft and the motor is oiled conveniently, lubricating oil can lubricate the interior of the roll shaft through the oil holes, the roll shaft can be used in cooperation, oiling work can be facilitated, the roll shaft cannot be clamped after long-term work, and ideal smashing can be achieved.

The mobile phase bottle comprises a bottle body and a bottle neck connected to the bottle body, the bottle neck is provided with an opening end, and the opening end faces the inclined lower portion. Compared with the existing design that the opening of the bottle neck faces upwards, the bottle neck of the mobile phase bottle is provided with the opening end facing downwards obliquely, so that the cap top of the bottle cap for sealing the opening end also faces downwards obliquely, and particulate foreign matters such as dust can be prevented from falling into a channel through an external pipe opening formed in the cap top; and the channel cannot be blocked even if the liquid chromatograph is idle for a long time, so that the normal use of the liquid chromatograph is ensured. In addition, the opening end of the bottle neck faces the inclined lower portion, part of the section of the bottle neck is certainly in a bent extending posture, the bent extending section enables the mobile phase to be subjected to resistance in the volatilization process, then backflow is formed, and volatilization of the mobile phase can be remarkably reduced.

The invention discloses a composite film etching solution and application thereof in etching of a copper layer and nickel layer composite film, and belongs to the field of chemical etching of electronic equipment. The etching solution comprises the following main components: sulfuric acid, hydrochloric acid, ferric chloride, oxalic acid, hydrogen peroxide, sodium sulfate, glutamic acid and the balance of ultrapure water. The etching solution can be used for etching a copper and nickel composite film, the etched edge is flat and smooth, the taper angle is proper, the etching speed is high, no insoluble substance is generated, the operation is simple, the consumed time is less, and the etching solution is suitable for industrial batch production.

The invention provides a cleaning device which comprises a cleaning head, and the cleaning head comprises a shell, a roller, a water pressing plate, a scraping strip assembly and a water tank. The roller can rotate to wipe the floor after being wetted; the water pressing plate covers the top of the roller and interferes with the roller; the scraping strip assembly comprises a friction part and a drainage part, the drainage part comprises a water squeezing strip and a water receiving strip, and the friction part and the water squeezing strip interfere with the roller; the water tank is formed by a water pressing plate, a water squeezing strip, a water receiving strip and a roller; the roller, the sewage tank, the water pressing plate and the scraping strip assembly are detachably installed on the shell, and after water is squeezed out of the roller through the water pressing plate, the roller continues to rotate to the portion making contact with the ground and can continue to absorb wet garbage. Self-cleaning of the roller can be achieved through the water and dust circulation cleaning technology, sweeping, mopping, washing and twisting are combined together, great convenience is brought to a user, and the very good cleaning effect can be achieved.

The utility model discloses a filtering device for a low-nitrogen combustor, and relates to the field of low-nitrogen combustors, the filtering device comprises a combustor body, a filtering assembly and an adjusting assembly, gas enters a gas inlet cylinder, through a plurality of adhesion plates which are obliquely arranged in a staggered mode, smoke is guided to sequentially pass through the adhesion plates, and through the curved surfaces of the outer surfaces of the adhesion plates, the smoke is guided to pass through the adjusting assembly; the flue gas is guided by the adhesion plate on the upper layer and hit on the surface of the adhesion plate on the lower layer, so that large-particle substances in the flue gas are adsorbed on the adhesion plate, the large-particle substances are filtered, the blockage problem is avoided, and the device is convenient to use and high in practicability. The hexagonal nut at one end of the two-way threaded rod is rotated by using other tools, so that the two-way threaded rod is driven to rotate, the two control blocks oppositely move in the connecting cylinder, then the gap of the space in the connecting cylinder is controlled, the gas flow rate is adjusted, and the gas inlet amount is conveniently controlled.

The present application relates to the biological field, and particularly to a weak acid buffer and its use in an immunopeptidome separation reagent, the weak acid buffer comprising amino acids and / or polypeptides, the mass-to-charge ratio of the amino acids and / or polypeptides being theoretically predictable and experimentally reproducible, or the mass-to-charge ratio being beyond the preset acquisition range of a mass spectrometer; the weak acid buffer further comprising a volatile acid, the volume concentration of the volatile acid being 0.01% to 10%; and the pH of the weak acid buffer being 3.0 to 3.5. The weak acid buffer of the present application has high compatibility, can maximally avoid pollution and signal interference to an analysis system, has a simple experimental procedure, and the overall operation can be completed within tens of minutes, thus having low technical threshold and high acceptability; can improve the number of immunopeptide groups identified, thus improving the efficiency of the experiment; and the reagent is cheap and easy to obtain, thus the method has low cost, is suitable for large-scale or even industrial use, has high universality, and the like.

This utility model relates to the field of silicon carbide pretreatment technology, specifically disclosing a pretreatment method for silicon carbide flat sheet film sintering powder. The method includes a premixing tank with a feeder at the top and a discharge port at the bottom. A discharge valve is located outside the discharge port, and an inclined guide trough is located below the discharge port. The inclined guide trough is rotatably connected to the premixing tank via cylindrical pins on the left and right sides of the outer wall of the premixing tank. A vibration assembly is provided on the premixing tank to drive the inclined guide trough to oscillate. A first rotating shaft is located inside the premixing tank, and two second rotating shafts are arranged around the first rotating shaft. Multiple stirring rods are located outside the first and second rotating shafts. The dual-shaft structure can break up powder agglomerates inside the tank, ensuring that the silicon carbide powder does not clog when discharged. The discharged powder passes through the inclined guide trough to the target area. The vibration assembly drives the inclined guide trough to oscillate, accelerating powder discharge while preventing powder blockage between the discharge port and the inclined guide trough, further improving the smoothness of powder discharge.