202results about How to "Ensure normal flow" patented technology

The utility model provides a skid-mounted mixing system and belongs to the technical field of skid-mounted mixing. Comprising a box body; the stock bin is arranged in the box body; the grading part is arranged on the stock bin, and the grading part comprises a high-level material level sensor which is arranged at the top of the stock bin and used for preventing excessive filling of materials. According to the utility model, the grading part is arranged, and high, middle and low three-level material level monitoring points are arranged in the stock bin, so that the real-time monitoring of the material level in the stock bin is realized, the overflow caused by excessive filling of the material can be effectively prevented, the continuity of material supply is ensured, the interruption of production due to material shortage is avoided, and when the material level drops to an early warning point, the production efficiency is improved. The system can trigger a material supplementing mechanism in time to prevent a production line from being shut down due to material exhaustion, so that the continuity and the stability of a production process are maintained.

The invention relates to the technical field of aero-engine turbine blade cooling, and discloses an aero-engine turbine blade cooling structure and a pre-cooling method.The aero-engine turbine blade cooling structure comprises an inner wall and an outer wall which are of a double-layer structure, the inner wall is arranged in the outer wall, the inner wall comprises a wall face, and a plurality of impact holes are formed in the wall face in parallel in a penetrating mode; a plurality of cooling channels are arranged in the wall surface in parallel; the cooling channels are arranged among the impact holes; each cooling channel comprises an inlet end and an outlet end; the inlet end is connected with a fuel oil system and is used for feeding fuel oil into the cooling channel; the outlet end is connected with a fuel oil system and used for discharging fuel oil in the channel to the fuel oil system. The diameter of the cooling channel is within 1mm; and a plurality of air film holes are formed in the outer wall. Cooling gas in the turbine is pre-cooled through aviation fuel, so that the cooling effect of the turbine is further improved.

The jettisonable gas sensor comprises a jettisonable unmanned aerial vehicle and a controller, the bottom of the controller is fixedly connected with a jettisonable device, the jettisonable device comprises a fixing plate and a rotating shaft rotationally connected to the fixing plate, and the fixing plate is rotationally connected with the controller through the rotating shaft; two limiting holes are formed in the bottom of the fixing plate, electric push rods are arranged in the two limiting holes, and connecting mechanisms are fixedly connected to the bottoms of the two limiting holes; the effect of accurately detecting gas information is achieved through the buffering mechanism, when the damping mechanism falls to the ground, the buffering air bag absorbs impact energy, a movable rod in the buffering air bag moves to drive related parts to eject the parachute, an air inlet or a sensing part of the detection mechanism is prevented from being covered, and effective contact between a sensor and external gas is guaranteed; therefore, gas information is accurately converted into electric signals, accurate detection is realized after processing, and reliable data is provided for mastering on-site gas conditions.

The invention discloses a casting machine with multiple temperature zones, which is characterized in that a plurality of temperature zones are divided in an upper drying tunnel, a passive rotary drum chamber and a lower drying tunnel, and the temperature zones at least comprise a first temperature zone, a curve temperature zone and a lower drying tunnel temperature zone; at least one first temperature zone is arranged in the upper drying tunnel, and the first temperature zone is close to an inlet of the upper drying tunnel; a parallel air circulation treatment device is arranged in the first temperature zone, the parallel air circulation treatment device comprises a parallel air duct air inlet part and a parallel air duct air outlet part which are oppositely arranged, and the parallel air duct air inlet part and the parallel air duct air outlet part are at least arranged above the steel belt; at least one curve temperature zone is arranged in the driven rotary drum chamber; a curve section temperature control device is arranged in the curve temperature zone or on the outer side of the passive rotary drum chamber; and at least one lower drying tunnel temperature zone is arranged in the lower drying tunnel. According to the scheme, the process time of the film material, the temperature in the hardening state, the drying mode and the like are controlled more accurately, temperature change is continuously avoided from sudden change, the film quality is effectively improved, and the solvent evaporation efficiency is guaranteed.

The invention relates to the technical field of aquaculture wastewater cyclic utilization, in particular to an aquaculture wastewater microalgae cyclic utilization system and a method thereof.The aquaculture wastewater microalgae cyclic utilization system comprises a raceway pond, a wastewater pretreatment mechanism and a power stirring mechanism, and a pipeline type photobioreactor is arranged on one side of the raceway pond; one side of the top end of the pipeline type photobioreactor is connected with a liquid storage tank, the bottom end of the liquid storage tank is connected with a second connecting pipe, the bottom end of the liquid storage tank is connected with a liquid discharging pipe, one end of the raceway pond is provided with a gas storage tank, one end of the gas storage tank is connected with a first connecting pipe, and the middle of the raceway pond is fixedly connected with a second partition plate. The system is high in applicability, high in stability and high in flexibility, the position is adjusted according to specific conditions, the microalgae culture cost of the system is low, the process is simple and convenient, the benefits of a user are improved, meanwhile, waste water generated by aquaculture can be recycled and turned into wealth, secondary pollution to the environment is avoided, and the environment can be protected.

The invention relates to the technical field of waste gas treatment, in particular to potassium permanganate production waste gas treatment equipment with an aggregate purification function, the waste gas treatment equipment comprises a base, a spray tower and a fan, the spray tower is arranged on the base, and the fan is arranged on the outer side of the base; compared with an existing waste gas treatment device, the waste gas treatment device is provided with the material collecting assembly, the material collecting assembly can conduct centralized treatment on particulate matter intercepted on the filter screen on the basis of guaranteeing waste gas flowing, and meanwhile the situation that the particulate matter intercepted on the filter screen is blocked in the moving process of the filter screen can be avoided; the waste gas purification device is further provided with a filler assembly, the height of the filler assembly can be adjusted in time according to the flow speed of the waste gas and the flow of the alkaline solution, and therefore it is guaranteed that the time of the alkaline solution staying in the filler layer is long enough on the basis that it is guaranteed that the alkaline solution smoothly passes through the filler assembly.

The utility model discloses efficient chemical raw material grinding equipment for chemical industry, which belongs to the technical field of chemical raw material processing and comprises a grinding tank, a supporting plate is mounted on the grinding tank, a feeding port is formed above the grinding tank, a first mounting plate is connected above the grinding tank, a feeding hopper is connected above the grinding tank, and a second mounting plate is connected above the feeding hopper. And a grinding plate is connected to the interior of the grinding tank, and a discharging pipe is connected to the lower portion of the grinding tank. According to the efficient chemical raw material grinding equipment for the chemical industry, large chemical raw materials are swallowed and crushed through two crushing wheels which rotate reversely, the size of the raw materials is reduced, the raw materials can smoothly enter the position between a grinding wheel and a grinding plate, a first motor can rotate a rotating shaft, and the grinding wheel can rotate in the grinding plate; and the raw materials crushed by the crushing wheel can be ground and refined by the grinding wheel more quickly and better, so that the grinding efficiency of the chemical raw materials is improved.

The utility model relates to the technical field of energy storage battery cabins, and discloses a safe and explosion-proof energy storage battery cabin which comprises a battery cabin shell, a sealing cover is connected to the left side of the battery cabin shell, a first pressure release valve is installed at the left end of the sealing cover, cooling assemblies are installed on the inner side and the outer side of the battery cabin shell, and a second pressure release valve is installed at the left end of the first pressure release valve. The cooling assembly comprises a special-shaped water tank, a semiconductor chilling plate, a sealing heat conduction piece, a second pressure release valve, a heat conduction containing shell, a spiral water cooling pipe, an infusion pump and a spoiler. According to the safe and explosion-proof energy storage battery cabin, the temperature of heated liquid in the special-shaped water tank is reduced by using a sealing heat-conducting fin and a semiconductor chilling plate, so that low-temperature liquid always flows in a spiral water-cooling pipe, heat dissipation and cooling of a storage battery in a heat-conducting placement shell are maintained, and the cooling effect of the energy storage battery cabin is improved; the problem of potential safety hazards caused by too high heat of the energy storage battery cabin is avoided, and operation and use of a user are further facilitated.

The utility model belongs to the technical field of flow control devices, and provides a laminar flow element and a mass flow controller, the laminar flow element comprises a sleeve, the sleeve comprises a first section and a second section which are arranged along a first direction, and the inner surface of the second section is provided with an internal thread; the plunger is arranged in the sleeve; the plunger comprises a third section and a fourth section which are arranged in the first direction, an annular laminar flow gap is defined by the third section and the first section, and the area of the cross section of the laminar flow gap is gradually decreased in the direction from the third section to the fourth section; at least one of the second section and the fourth section is provided with a channel, the channel extends in the first direction, the channel is communicated with the laminar flow gap, and the channel is communicated with the two ends of the sleeve in the first direction; and an external thread is arranged on the outer surface of the fourth section and is in threaded connection with the internal thread. According to the laminar flow element provided by the embodiment of the invention, the technical problem that the sleeve cannot be used after assembly errors are solved.

The utility model discloses an air filtering device. The air filtering device comprises a dust collection box, an exhaust pipe, a filtering structure and an upper cover, the filtering structure comprises a filtering assembly and an air inlet cover; the filtering assembly comprises a mounting platform and an upper air pipe, and a plurality of lower air pipes are arranged on the mounting platform; wherein a spiral flow guide part is arranged on the outer circumference of the upper air pipe, and the upper air pipe is inserted and fixed in the lower air pipe. Through the unique design of the upper air pipe and the lower air pipe, the assembly process is simplified, and the filtering effect is enhanced. A spiral flow guide part is arranged on the outer circumference of the upper air pipe and is directly inserted into the lower air pipe to ensure stable installation and improve the filtering efficiency.

The utility model discloses anti-flocculation equipment for water-based acrylic coating processing, and relates to the technical field of water-based acrylic coating production, the anti-flocculation equipment comprises a production tank, support legs and a circulating mechanism, the support legs are fixedly mounted on the lower surface of the production tank, the circulating mechanism comprises a mounting plate, and a circulating pump is fixedly connected to the upper surface of the mounting plate; the input end of the circulating pump is fixedly connected with an extraction pipe with one end communicated with the interior of the production tank, the output end of the circulating pump is fixedly connected with a discharge pipe, one end of the discharge pipe is fixedly connected with an electromagnetic three-way valve, and one connector of the electromagnetic three-way valve is fixedly connected with a reverse discharge pipe. According to the utility model, the low-power operation of the circulating pump is kept, the circulating pump extracts the water-based acrylic coating from the inside of the production tank through the extraction pipe, and then the water-based acrylic coating passes through the discharge pipe and the electromagnetic three-way valve and is input to the top of the production tank through the reverse discharge pipe, so that the flowing of the water-based acrylic coating is kept, and the water-based acrylic coating is not easy to flocculate and low in energy consumption.

The utility model discloses a ship air conditioning device with an excellent purification effect, which comprises a purification box body, a purification module is arranged in the purification box body, a cover plate is fixedly arranged at the top of the purification box body through bolts, the bottom end of the cover plate is fixedly connected with a sealing plate, and four corners of the bottom end of the sealing plate are respectively and fixedly connected with an outer guide cylinder. The outer guide cylinder is slidably connected with a positioning assembly, the center of the positioning assembly is slidably connected with an inner guide cylinder, the inner guide cylinder is fixedly connected with the center of the bottom end of the sealing plate, and the bottom end of the positioning assembly abuts against the purification module; one end of the purification box body is fixedly connected with a filter shell, two sides in the filter shell are fixedly connected with a filter plate I and a filter plate II respectively, the centers of the filter plate I and the filter plate II are rotationally sleeved with transmission shafts, one end of each transmission shaft is fixedly connected with a driving motor, and the driving motor is fixedly mounted on the filter plate II; a plurality of first scraping strips and second scraping strips are fixedly connected to the two sides of the transmission shaft respectively, the first scraping strips abut against the first filter plate in a sliding mode, and the second scraping strips abut against the second filter plate in a sliding mode.

The invention discloses a road open-cut assembly type tunnel transverse channel structure, and belongs to the technical field of tunnel construction, the road open-cut assembly type tunnel transverse channel structure comprises a transverse channel transversely connected between a left line channel and a right line channel, the top of the transverse channel is provided with a smoke exhaust channel communicating with the left line channel and the right line channel, and a smoke exhaust pipe is installed in the smoke exhaust channel; a plurality of filter plate sets are installed in the smoke exhaust pipe side by side, each filter plate set comprises two filter plates installed on the inner walls of the two opposite sides of the smoke exhaust pipe respectively, notches are formed between the filter plates and the inner walls of the smoke exhaust pipe, the two filter plates in the same filter plate set are arranged in a staggered mode to form a broken-line-shaped smoke channel, and the smoke exhaust pipe is provided with a branch pipe communicating with the smoke exhaust pipe and the transverse channel. The branch pipes are arranged below the filter plates in a one-to-one correspondence manner, and collecting boxes are detachably mounted in the branch pipes. According to the smoke exhaust device, in the flowing process of smoke in the smoke exhaust pipe, dust in the smoke can be filtered through the filter plate, and the filtered dust falls into the collecting box and is conveniently discharged after being collected.

The utility model relates to the technical field of irrigation equipment, in particular to a greening maintenance sprinkling machine which comprises a movable rack, the movable rack comprises a bottom supporting plate, a water storage tank is fixedly arranged on the bottom supporting plate, an additive storage tank is arranged on the water storage tank, a feeding assembly for feeding materials into the water storage tank is arranged on the additive storage tank, and a sprinkling mechanism is arranged on one side of the water storage tank. The sprinkling irrigation mechanism comprises a water conveying header pipe communicated with the water storage tank, a water conveying pump is arranged on the water conveying header pipe, the water conveying header pipe at the downstream of the water conveying pump extends upwards, a first spraying pipe, a second spraying pipe and a third spraying pipe are sequentially arranged at the water outlet end of the water conveying header pipe in parallel from top to bottom, and sprinkling irrigation assemblies are arranged at the ends of the first spraying pipe, the second spraying pipe and the third spraying pipe. The water delivery pump draws the hydraulic pressure of water or solution in the water storage tank, so that the solution is lifted to a high position for spraying and irrigation. The automatic rotating joint is matched with the multifunctional spray head, so that irrigation of plants in different states is met, the spraying area and the spraying force are different, and the device adapts to spraying states in various forms.

The invention discloses a coal mill pull rod internal and external sealing mechanism, which comprises a sealing box body, a pull rod is slidably connected in the sealing box body, an external sealing mechanism is arranged at the bottom of the sealing box body, and an internal sealing mechanism is arranged in the sealing box body, and relates to the technical field of coal mill pull rods. According to the internal and external sealing mechanism for the pull rod of the coal mill, the internal sealing mechanism is arranged, a sealing ring and a sealing ring are extruded through a sliding block, so that the sealing ring and the pull rod are attached more tightly, the sealing effect is improved, air or dust is prevented from entering a sealing box body, the phenomena of powder leakage and pull rod abrasion are reduced, and the production efficiency is improved; the outer sealing mechanism is arranged, the pull rod is wrapped by the sealing folding pipe, the sealing performance is kept, and the sealing gasket is arranged at the joint of the connecting flange and the bottom of the sealing box body, so that external air or dust is prevented from entering the sealing box body through the joint of the pull rod and the bottom of the sealing box body.

The present invention provides a multi-layer high-efficiency filter, which relates to the technical field of fuel filters. The multi-layer high-efficiency filter comprises a shell, the top of which is threadedly connected to an upper cover assembly, the bottom of which is fixedly connected to a first filter element, a second filter element and a third filter element, and arranged in sequence from the outside to the inside; a partition is fixedly connected to the inner wall of the shell, the bottom of the shell is fixedly connected to a motor, and a cross plate is fixedly connected to the output shaft of the motor. By arranging a motor, a cross plate, a support rod, a turntable, a vertical plate, a first telescopic rod, a card plate, a second spring, a card hole, a card block, a scraper, a storage chamber, an inlet, a baffle, a filter hole, a second telescopic rod, a top plate, a connecting seat, a roller and a third spring, it is convenient to scrape impurities attached to the first filter element, the second filter element and the third filter element, and the scraped impurities are stored in the storage chamber to avoid secondary blockage caused by impurities, thereby ensuring the normal flow of fuel.

The utility model discloses a subway energy-saving fan which comprises a fan body, protective net pieces are arranged on the left side and the right side of the fan body, a rotating shaft is connected between the protective net pieces on the left side and the right side in a rotating fit mode, and two sets of fans which are correspondingly arranged on the left side and the right side are fixedly arranged on the rotating shaft in the circumferential direction. A first transmission wheel and a second transmission wheel are further fixedly arranged on the rotating shaft, a driving mechanism is mounted at the bottom of the fan body and comprises a shell, a mounting plate is fixedly arranged in the shell, a moving table is arranged on the left side of the mounting plate, and a driving motor is fixedly arranged in the moving table; an electric control telescopic controller used for controlling the moving table to move left and right is fixedly arranged in the mounting plate. The device can control the rotation speed adjustment of the fan, so that the service life is prolonged while energy is saved; spray can be diffused and sprayed out at a high speed, and the safety in the tunnel is further improved.

The utility model relates to the technical field of reactors, in particular to a reactor structure convenient for feeding and discharging materials, which comprises a reaction tank, a feeding cylinder is arranged at the top of the reaction tank, a feeding port is arranged at the top of the feeding cylinder, an annular scraper is arranged in the feeding cylinder, the annular scraper is in sliding connection with the inner side wall of the feeding cylinder, and the feeding port is communicated with the feeding cylinder. A first electric telescopic rod for driving the annular scraping plate to ascend and descend is mounted at the top of the feeding barrel, a discharging pipe is arranged at the bottom of the reaction tank, a mounting shell is arranged at the position, corresponding to the discharging pipe, of the bottom of the inner side of the reaction tank, and an opening corresponding to the discharging pipe is formed in the bottom of the mounting shell; a second electric telescopic rod is installed in the installation shell, the output end of the second electric telescopic rod is in driving connection with a material pushing plate, and the material pushing plate is matched with the discharging pipe. According to the utility model, the normal flow of loading and unloading is ensured, the blockage of the pipeline is avoided, and the production efficiency is ensured.

The invention provides semiconductor manufacturing equipment and a tail gas treatment method and system thereof. The semiconductor manufacturing equipment is provided with a process chamber and an exhaust flow path in fluid communication with the process chamber, and the tail gas treatment system is characterized by comprising a reaction medium adjusting unit which is configured to be in fluid connection with the exhaust flow path and used for controllably introducing a chemical modification medium into fluid in the exhaust flow path, the chemically modifying medium reacts with the process by-product in the fluid to produce a derivative having a higher stability than the process by-product; a hydrodynamic driving unit configured to generate a pressure gradient in the exhaust flow path in a direction away from the process chamber to move the derivative in the direction away from the process chamber; and the dynamic balance control unit is configured to adjust the medium introduction parameter of the reaction medium adjusting unit and the driving parameter of the fluid power driving unit according to the real-time pressure state in the process chamber.

The utility model provides a grate cooler discharging device, and relates to the technical field of grate coolers, the grate cooler discharging device comprises a discharging hopper, a first material ramming assembly and a second material ramming assembly are rotatably arranged in the discharging hopper, the first material ramming assembly and the second material ramming assembly are arranged in an up-down staggered mode, and a first driving part and a second driving part are arranged on the outer side of the discharging hopper; the first driving part is used for driving the first material ramming assembly to swing, the second driving part is used for driving the second material ramming assembly to swing, and a material crushing grid is fixedly arranged in the discharging hopper and located below the second material ramming assembly. The discharging port of the discharging hopper is connected with the discharging pipeline, when large clinker enters the discharging hopper, the large clinker is scattered by the first material ramming assembly and the second material ramming assembly, then downwards impacts the material crushing grid to be further crushed and finally enters the discharging pipeline, the situation that the discharging pipeline is blocked is effectively avoided, normal flowing of materials is guaranteed, and no-load of the clinker conveyor is avoided; the production efficiency is ensured.

The application discloses a non-premixed combustor capable of simultaneously generating oxidation environment and reduction environment and relates to the technical field of combustors.The combustor comprises an oxidation gas cavity cover plate, an oxidation gas cavity I, an oxidation gas cavity II, a fuel gas cavity I, a fuel gas cavity II, a gas fuel pipe group and a center powder feeding pipe and the like modules, can simultaneously generate oxidation environment and reduction environment, and can flexibly replace different types of optical windows, flexibly adjust flame intensity and flexibly adjust the length of the center powder feeding pipe extending out of the oxidation gas cavity cover plate, is a non-premixed combustor capable of simultaneously generating oxidation environment and reduction environment, and has the advantages of simple and compact structure, safe and convenient operation, high flexibility and stable planar flame generation.

The invention provides a liquid viscosity measuring device and method.The device comprises a measuring container used for containing liquid to be measured, the top face of the measuring container is in a cone shape extending outwards, a closed control cavity is formed in the top end of the measuring container, and the inner diameter of the control cavity is smaller than the diameter of a measuring steel ball; the measuring steel ball is arranged in the measuring container; the rotating mechanism is used for driving the measuring container to rotate by 180 degrees around the horizontal axis of the measuring container, so that the measuring container is switched between an upright state and an inverted state; one end of the control cavity is directly communicated with the interior of the measuring container, the other end of the control cavity is communicated with the interior of the measuring container through a first pipeline provided with a first stop valve, and the other end of the control cavity is further provided with a pressure relief device used for adjusting the internal pressure of the control cavity. According to the invention, the ball falling time can be accurately measured, so that the liquid viscosity measurement precision is improved.

This application relates to the field of air conditioning technology, specifically providing a heat exchanger, an outdoor air conditioning unit, and an air conditioner, aiming to solve the problem that heat exchangers cannot simultaneously meet the flow path requirements of cooling and heating modes. The heat exchanger includes: a first main pipe comprising two branch main pipe sections; at least two sets of heat exchange tube groups, each set of heat exchange tube groups correspondingly connected to a branch main pipe section, including a first sub-tube group and a second sub-tube group, the first sub-tube group including a first branch pipe group and a second branch pipe group; a first control valve disposed between a first connection node of the first sub-tube group and a branch main pipe section and a second connection node of the second sub-tube group and a branch main pipe section; multiple second main pipes correspondingly connected to each set of heat exchange tube groups; second control valves disposed between a third connection node of the first branch pipe group and a second main pipe and a fourth connection node of the second branch pipe group and a second main pipe; and refrigerant distributors respectively connected to the multiple second main pipes. This solution can have different refrigerant flow paths in different modes.

The utility model provides a kind of inner air guide heating type drying cabinet, including drying cabinet body, the outer wall of drying cabinet body is equipped with control area, drying chamber is opened in the side of control area on drying cabinet body, and the inner bottom wall of drying chamber is integrally formed ventilation cover, ventilation cover top is equipped with several ventilation holes, which are connected with its inside, drying chamber is opened in the side of drying chamber away from control area in drying cabinet body, and the inner bottom wall of cavity is equipped with multiple mounting holes, which are connected with the inside of ventilation cover.The utility model can blow hot air to the material under the supporting plate when drying material, realize the air guide effect of drying chamber inside to material, and hot air is directly blown to the top of material to be dried, which is beneficial to the drying treatment of material, and is beneficial to the uniform drying of material, and hot air is directly blown to the top of material to be dried, which is directly effective on material, improves drying effect and drying efficiency.

The invention relates to the technical field of switching valves, in particular to a high-speed switching valve capable of reducing momentum impact, which comprises a valve body, and is characterized in that a mounting cavity is arranged in the valve body, a first interface is arranged at one end of the valve body, and a valve core is arranged in the valve body; the side edge of the valve body is provided with a connector used for controlling steering of the valve element, a buffer piston is arranged at one end of the interior of the mounting cavity, a gap used for flowing of media is formed between the buffer piston and the inner wall of the mounting cavity, the valve element and the buffer piston are coaxially arranged, impact kinetic energy can be remarkably reduced, and the service life of the valve element is prolonged. And the rapid performance is not influenced while the impact is finally reduced.

The utility model relates to the technical field of traffic facilities, in particular to a photovoltaic integrated subway entrance and exit platform subway entrance, the upper end of the subway entrance is provided with a plurality of roof windows, and the left ends of the roof windows are rotatably sleeved with angle adjusting devices; a sealing groove is formed in the outer side of the shed roof window; an operation box is arranged on the side ground of the subway entrance; the photovoltaic integrated subway entrance and exit platform has the advantages that by arranging the angle adjusting device, the angle of the photovoltaic power generation device can be adjusted, the light receiving efficiency of the photovoltaic power generation device is improved, meanwhile, the ceiling can be opened for ceiling ventilation, air flow in the platform is kept, and the fireproof efficiency is improved.

The utility model discloses a waste gas treatment device for a carbon emission reduction system of a thermal power plant, which relates to the technical field of energy-saving and environment-friendly equipment and comprises a gas inlet pipeline and a support frame, sealing covers are arranged at two ends of the gas inlet pipeline, a communicating pipe is arranged in the middle of the outer side of each sealing cover, and a centrifugal fan is arranged in the gas inlet pipeline. A guide plate is arranged on the inner wall, close to the lower portion of the centrifugal fan, of the air inlet pipeline, an opening is formed in the side wall of the lower portion of the air inlet pipeline, a sealing door is arranged at the opening and rotatably installed on the portion, on one side of the opening, of the air inlet pipeline, and a first filter plate is arranged on the inner wall of the sealing door; compared with the prior art, the waste gas impurity removal device has the advantages that the chance and probability that impurities are in contact with the first filter plate are greatly improved through the centrifugal fan, the guide plate and the first filter plate, the waste gas impurity removal effect is effectively improved, the sealing performance of the whole device is improved through the sealing door and the first filter plate, and the service life of the device is prolonged. And adverse effects of waste gas leakage on environment and equipment operation are avoided.

The utility model discloses a grouting sleeve for detecting grouting fullness, and belongs to the technical field of building construction. Comprising a horizontally-arranged through pipe, a plurality of grouting sleeve assemblies are arranged on the through pipe side by side at intervals, every two adjacent grouting sleeve assemblies communicate with each other through a connecting pipe, each grouting sleeve assembly comprises a lower sleeve perpendicularly arranged on the through pipe in a communicating mode, and the end, away from the through pipe, of each lower sleeve is movably connected with an upper sleeve; grout outlet holes are formed in the side walls of the upper sleeves, the upper sleeves are communicated through a connecting pipe horizontally penetrating through the grout outlet holes, and a sealing cover pipe assembly is further arranged on the penetrating pipe in a communicating mode. The grouting device has the advantages that the number of times of grouting operation is reduced, and meanwhile the grouting efficiency is improved.

The utility model relates to the technical field of air drying, and discloses freezing type compressed air drying equipment capable of rapidly cooling and dehumidifying, which comprises a base, and a driving assembly and a drying assembly are respectively arranged on the upper end face of the base. The drying assembly comprises a freezing box, a piston rod, a cleaning rod, a sleeve, a connecting box, a first connecting pipe, a second connecting pipe, a fixing plate, a sealing plate, a first spring, a second spring, a cleaning ring and a one-way valve, the surface of the piston rod is slidably connected with the inner wall of the sleeve, and one end of the piston rod is connected with one end of the cleaning rod; compared with the prior art, the cleaning device has the advantages that the piston rod drives the cleaning rod to slide in the first connecting pipe through the cleaning rod and the cleaning ring, impurities attached to the inner wall of the first connecting pipe can be cleaned in time, and the cleaning ring in the second connecting pipe can clean impurities on the inner wall of the second connecting pipe under the pushing of gas and the action of the second spring; and the influence of impurity residues on the heat exchange efficiency is reduced.

The invention belongs to the technical field of mechanical engineering, and discloses a protection device suitable for a two-end telescopic rod, which comprises a two-end telescopic rod, and a protection assembly is fixedly mounted on the outer side of the movable end of the two-end telescopic rod; the protection assembly comprises an installation ring fixedly installed at the top of the movable end of the two-end telescopic rod, a telescopic hose is fixedly installed at the top end of the installation ring and connected to the outer side of the movable end of the two-end telescopic rod in a sleeving mode, and a positioning ring is fixedly installed at the bottom end of the telescopic hose. The positioning ring is fixedly installed at the top of the fixed end of the two-end telescopic rod, lubricating oil can be automatically provided for the movable end of the two-end telescopic rod, abrasion between the two-end telescopic rod is reduced, the service life of the two-end telescopic rod is prolonged, abrasion and faults are reduced, accurate injection of the lubricating agent is guaranteed, the problem of excessive or insufficient lubricating agent is avoided, and the service life of the two-end telescopic rod is prolonged. And moreover, backflow of the lubricant is prevented, the lubricant is ensured to always flow towards the required direction, and the lubricating effect is improved.