46results about How to "Increase the passing area" patented technology

The present invention relates to a switch magnetic valve, which is taken as a pre-control valve to generate and control pressure in vehicle pneumatic braking system, wherein the switch magnetic valve comprises a first passage, used for introducing compressed-air into the switch magnetic valve or export compressed-air from the switch magnetic valve; a second passage, used for introducing compressed-air into the switch magnetic valve or export compressed-air from the switch magnetic valve; a valve chamber including a valve seat for selectively release and break off compressed-air stream; and a valve core, provided with an outer housing surface and a hole used let the compressed-air pass through. According to the invention, the valve chamber (32) is provided with a flow path (28); the flow path (28) neighbors with housing surface (70) of the valve core (24); the flow path (28) is formed by at least one gap on housing surface (70) of the valve core (24) in preference.

The invention discloses a ventilating slot structure of a generator rotor. The ventilating slot structure of the generator rotor comprises a slot bottom filler strip, a rotor winding, a filler strip under a wedge, a damping winding and a rotor slot wedge, wherein at least one channel forming radial ventilating with a vent hole is axially formed in the rotor winding, any two adjacent copper rows form the channel in the axial direction of the rotor winding, an air inlet in the lower part of the channel is slantly distributed in the direction of cooling air, a ventilating duct with an S-shaped cross section is at least arranged at the upper part of the channel, a plurality of copper wires in the axial direction of the copper rows at the upper part of the channel are distributed in a staggered manner, and any two adjacent copper rows form the S-shaped vent duct in the axial direction of the rotor winding. The air inlet in the lower part of the channel is slantly distributed in the direction of the cooling air, so that the air intake resistance of the air inlet of the channel is effectively reduced, the air intake flow rate of the cooling air entering the channel is increased, the cooling air entering through the air inlet in the lower part of the channel enters the S-shaped vent duct to form turbulent flow, so that the ventilating and cooling effects are greatly improved.

The invention discloses a foam metal filtering spiral type oil separator. The foam metal filtering spiral type oil separator comprises an outer barrel with the top provided with a gas inlet connector and a gas outlet guide tube, wherein the interior of the outer barrel is divided into a spiral gas inlet cavity, a filtering cavity and an oil collecting cavity from top to bottom; the bottom end of the gas outlet guide tube stretches to the bottom of the filtering cavity, and the bottom end face of the gas outlet guide tube is sealed; a spiral guide blade is arranged in the spiral gas inlet cavity; an annular three-layer foam metal filtering layer is arranged in the filtering cavity, and a circulating hole is formed in the gas outlet guide tube in the foam metal filtering layer; a partition plate is arranged on the top face of the three-layer foam metal filtering layer, and the bottom face of the three-layer foam metal filtering layer is arranged on an annular oil falling umbrella; the three-layer foam metal filtering layer and the oil collecting cavity are separated by the annular oil falling umbrella; a center hole is formed in the center of the annular oil falling umbrella, an oil guide tube is arranged on the edge of the annular oil falling umbrella, and an oil falling hole is formed below the annular oil falling umbrella; an oil outlet is formed in the center of the bottom face of the oil collecting cavity. According to the foam metal filtering spiral type oil separator, the content of large oil drops in air flow is reduced through the spiral guide blade, then the oil drops are effectively intercepted with the three-layer foam metal filtering layer, and therefore the gas-oil separating effect is improved.

The invention discloses a chemical waste gas spraying and washing treatment tower, and belongs to the technical field of waste gas treatment. The tower comprises a first treatment tower, a second treatment tower, a third treatment tower and a PLC, and third electromagnetic valves are arranged at the lower parts of the right ends of the first treatment tower, the second treatment tower and the third treatment tower; particle filtering layers are arranged at the upper parts of the right ends of the first treatment tower, the second treatment tower and the third treatment tower; an air pump is arranged on the left side of the first treatment tower; the air pump is electrically connected to the PLC; an extraction pipe is fixed at the extraction opening of the air pump; a first exhaust pipe isfixed at the exhaust port of the air pump; the other end of the first exhaust pipe extends into the first treatment tower, a pH sensor is fixed to the inner wall of the first exhaust pipe, the pH sensor is electrically connected to the PLC, a first electromagnetic valve is installed on the first exhaust pipe, corresponding treatment can be conducted conveniently according to the pH value of wastegas, and the treatment effect is good.

The invention discloses a shaftless type submersible axial flow electric pump and belongs to the technical field of water pumps. The shaftless type submersible axial flow electric pump comprises a water intake section, a submersible motor section and a flow deflector section; the lower end of the submersible motor section is connected with the water intake section through a fastening bolt; the flow deflector section is connected with the upper end of the submersible motor section and comprises a flow deflector and a flow deflecting blade; the flow deflector is a frustum shaped cylinder; the flow deflecting blade integrally cast with the frustum shaped cylinder of the flow deflector is arranged on the inner wall of the frustum shaped cylinder of the flow deflector; and the water intake section at the bottom of the pump is a bellmouth shaped cylinder. The shaftless type submersible axial flow electric pump has the following advantages: the shaftless type submersible axial flow electric pump shortens the overall size of the water pump, increases the passing area of the water flow passing through the cavity of the water pump, increases the water passing flow of the water pump, improvesthe hydraulic efficiency, lowers the noise during the operating process of the water pump, improves the passing capacity of sundries in water, and reduces the probability that a water pump impeller is wound with long fiber or other sundries. A magnetic fluid double suspension block bearing increases and improves the operating speed and operating stability of a motor rotor to improve the performance of the water pump.

The invention discloses a chip processing chamber liner and a chip processing chamber comprising the liner. The invention comprises a inside wall and a lateral wall , the inside wall l is connected with the lateral wall through a screen board, and the shield plate is obliquely connected with the sidewall. The slope area has obvious increment compared with that of the plane area, therefore a slope structure can increase the quantity or the area of the shield openings , namely, the slope structure can increase the passing area of airflow. According to requirements, the inclined angle of the shield plate and the direction of the shield opening can be chosen, so as to reach the purpose of the uniformity of airflow field on the surface of the chip. The invention is mainly applied in the semiconductor chip processing chambers, and also is applied in other similar cavities.

The invention provides an adjustable ICU auxiliary breathing device, and relates to the technical field of medical instruments. The adjustable ICU auxiliary breathing device comprises a support frame;the top end of the support frame is fixedly provided with a control panel; the front end of the control panel is fixedly connected with an air tube; the end, away from the control panel, of the air tube is fixedly connected with a transition tank; the other end of the transition tank communicates with a respirator; and an upper connecting base and a lower connecting base are fixedly installed atthe upper end and the lower end of the transition tank respectively. The adjustable ICU auxiliary breathing device realizes adjustment of the tidal volume by controlling the speed of a motor, is highin adjusting precision and high in response speed, improves the comfort of a patient, can automatically relieve pressure to avoid air pressure injury caused by overlarge tidal volume, and can stir internal air to avoid uneven distribution of air inhaled by the patient and avoid the phenomenon of dyspnea of the patient when a ventilator is abnormally stopped.

The invention discloses a reactive muffler for an engineering machine, which comprises a flange plate, a connecting pipe, a barrel and a smoke exhaust pipe. The inside of the barrel is sequentially divided into a cavity I, a cavity II and a cavity III by a front partition board and a rear partition board from front to back, two first sound attenuation barrels which are positioned in the cavity I and the cavity II are disposed on the front partition board, two second sound attenuation barrels are arranged in the cavity II, a third sound attenuation barrel is disposed in the cavity III, the first sound attenuation barrels and the second sound attenuation barrels are arranged along the axial direction of the barrel, the third sound attenuation barrel is perpendicular to the first sound attenuation barrels and the second sound attenuation barrels, the connecting pipe and the smoke exhaust pipe are perpendicularly connected onto the barrel and are spatially perpendicularly arranged in a crossed manner, the connecting pipe is communicated with the cavity I, the smoke exhaust pipe is communicated with the cavity III, and the flange plate is connected with the cavity I via the connecting pipe. The reactive muffler is reasonable in structure, fine in acoustic performance and long in service life, regenerated noise of airflow is low, and a muffler effect for low, medium and high-frequency noise of exhaust of an engine is remarkable.

The invention discloses a composite system formed by a gas water heater and an air source heat pump. The composite system structurally comprises the gas water heater and the air source heat pump; a water outlet of the air source heat pump is connected with a water inlet of the gas water heater, and a water outlet of the gas water heater is provided with a temperature sensor and is connected to a user side; an exhaust pipe of the gas water heater is connected to a heat exchange coil pipe, and refrigerants of the air source heat pump pass through the heat exchange coil pipe and then flow into an evaporator; a casing pipe is arranged on the outer side of the evaporator; a four-way valve is arranged on an inlet of the casing pipe and is connected to an exhaust outlet of the heat exchange coil pipe, an inlet of the casing pipe, a first ventilation pipe and a second ventilation pipe; and an air blower is arranged on the second ventilation pipe, and a plurality of turbulent flow plates are arranged in the casing pipe. The composite system can overcome shortcomings in the prior art, and the waste heat utilization rate of high-temperature tail gas is improved, and meanwhile the structure of a defrosting device is simplified; and reliability of running of equipment is improved.

The invention relates to a safe fixing mechanism of a building fire escape forced landing device. The safe fixing mechanism comprises a box body and a fixing rod. The fixing rod is arranged in the boxbody and is in sliding connection with the box body. One end portion of the fixing rod is provided with a locking part. The box body is internally provided with a sliding passage and a locking groove, wherein the sliding passage is in sliding connection with the locking part, and the locking groove is arranged at one end of the sliding passage and is used for forming a locking mechanism togetherwith the locking part. A shell of the box body is provided with a hole communicating with the locking groove. The fixing rod is in sliding connection with the hole wall of the hole. When the locking part is locked with the locking groove, the fixing rod is pulled out and arranged outside the box body, and forms an anchor-shaped mechanism together with the box body to increase the passing area of the building fire escape forced landing device. Therefore, the building fire escape device can move flexibly, and more fixing structures are added to be connected with indoor fixed objects at the sametime to improve the safety performance of the building fire escape device.

The invention discloses a variable compression ratio system of an internal combustion engine, and the internal combustion engine, and relates to the field of internal combustion engine auxiliary systems. The variable compression ratio system comprises an auxiliary connecting pipe, an auxiliary gas channel and a variable auxiliary gas valve; the auxiliary gas channel is formed in a gas cylinder cover connected with a gas cylinder and is connected with a gas inlet branch pipe through the auxiliary connecting pipe, the variable auxiliary gas valve is assembled in the auxiliary gas channel, and the maximum lift and the longest duration of the variable auxiliary gas valve correspond to 0.3-0.5 times of the maximum lift and the longest duration of a gas inlet valve; the variable auxiliary gas valve is driven by the variable gas valve system, and the variable gas valve system is connected with an ECU. Under the high-load steady working condition, the ECU can output a command to the variable gas valve of the variable gas valve system for timing controlling the variable auxiliary gas valve to be opened at the initial stage of compression; a specific proportion of mixture gas is stored between the auxiliary gas channel and a gas inlet channel for the next work cycle, and the effective compression ratio of the internal combustion engine is reduced; and the internal combustion engine comprises the variable compression ratio system of the internal combustion engine, and detonation of the internal combustion engine under the high-load steady working condition is prevented.

The invention discloses a ventilating slot structure of a generator rotor. The ventilating slot structure of the generator rotor comprises a slot bottom filler strip, a rotor winding, a filler strip under a wedge, a damping winding and a rotor slot wedge, wherein at least one channel forming radial ventilating with a vent hole is axially formed in the rotor winding, any two adjacent copper rows form the channel in the axial direction of the rotor winding, an air inlet in the lower part of the channel is slantly distributed in the direction of cooling air, a ventilating duct with an S-shaped cross section is at least arranged at the upper part of the channel, a plurality of copper wires in the axial direction of the copper rows at the upper part of the channel are distributed in a staggered manner, and any two adjacent copper rows form the S-shaped vent duct in the axial direction of the rotor winding. The air inlet in the lower part of the channel is slantly distributed in the direction of the cooling air, so that the air intake resistance of the air inlet of the channel is effectively reduced, the air intake flow rate of the cooling air entering the channel is increased, the cooling air entering through the air inlet in the lower part of the channel enters the S-shaped vent duct to form turbulent flow, so that the ventilating and cooling effects are greatly improved.

The invention discloses a reactive muffler for an engineering machine, which comprises a flange plate, a connecting pipe, a barrel and a smoke exhaust pipe. The inside of the barrel is sequentially divided into a cavity I, a cavity II and a cavity III by a front partition board and a rear partition board from front to back, two first sound attenuation barrels which are positioned in the cavity I and the cavity II are disposed on the front partition board, two second sound attenuation barrels are arranged in the cavity II, a third sound attenuation barrel is disposed in the cavity III, the first sound attenuation barrels and the second sound attenuation barrels are arranged along the axial direction of the barrel, the third sound attenuation barrel is perpendicular to the first sound attenuation barrels and the second sound attenuation barrels, the connecting pipe and the smoke exhaust pipe are perpendicularly connected onto the barrel and are spatially perpendicularly arranged in a crossed manner, the connecting pipe is communicated with the cavity I, the smoke exhaust pipe is communicated with the cavity III, and the flange plate is connected with the cavity I via the connecting pipe. The reactive muffler is reasonable in structure, fine in acoustic performance and long in service life, regenerated noise of airflow is low, and a muffler effect for low, medium and high-frequency noise of exhaust of an engine is remarkable.

The invention relates to an acrylic plate daylighting workshop. The acrylic plate daylighting workshop comprises a wall body. The front wall and the back wall of the wall body are each internally provided with a row of vertical beams. The tops of each row of vertical beams are provided with transverse beams in a supported mode. A plurality of longitudinal beams which are arranged at equal intervals are arranged between every two transverse beams in a supported mode. An acrylic euphotic plate is installed between the adjacent longitudinal beams. Each longitudinal beam is in a half cylinder shape. The top surface of each longitudinal beam is a plane. The arc surface of each longitudinal beam faces downwards. The acrylic euphotic plate is an arc curved surface, and the arc surface faces upwards. The two ends of the arc surface are tangent to the column surfaces of the longitudinal beams on the two sides.

The invention provides an adjustable ICU auxiliary breathing device, which relates to the technical field of medical equipment. The adjustable ICU auxiliary breathing device includes a support frame, the top of the support frame is fixedly installed with a control panel, and the front end of the control panel is fixedly connected There is a trachea, one end of the trachea away from the control panel is fixedly connected with a transition tank, the other end of the transition tank is connected with a breathing hood, and the upper and lower ends of the transition tank are respectively fixed with an upper connection seat and a lower connection seat. The adjustable ICU assisted breathing device realizes the adjustment of the tidal volume by controlling the speed of the motor, with high adjustment accuracy and fast response speed, which improves the comfort of the patient, can automatically relieve pressure, and avoid the air pressure caused by excessive tidal volume. It can stir the internal gas, avoid the uneven distribution of the gas inhaled by the patient, and avoid the phenomenon of difficulty in breathing for the patient when the ventilator stops abnormally.

The motorcycle silencer installed at the gas exhaust port of motorcycle includes three silencing cavities, the first one, the second one and the third one between the first one and the second one, and partition plates between each two silencing cavities. The partition plate between the second cavity and the third cavity is provided with ventilation holes, the first cavity has its air inlet connected to the exhaust pipe and a length of 1 / 3-1 / 2 total length of the silencer, the first cavity and the second cavity are connected via ventilation pipe through the third cavity, and the third cavity is provided with ventilation pipe through the second cavity and stretched beyond the silencer. Compared with available technology, the motorcycle silencer of the present invention has great amount of spoil, full chemical reaction of waste gas, increased gas flow area, less vibration, less exhaust and low noise.

The invention discloses a composite system formed by a gas water heater and an air source heat pump. The composite system structurally comprises the gas water heater and the air source heat pump; a water outlet of the air source heat pump is connected with a water inlet of the gas water heater, and a water outlet of the gas water heater is provided with a temperature sensor and is connected to a user side; an exhaust pipe of the gas water heater is connected to a heat exchange coil pipe, and refrigerants of the air source heat pump pass through the heat exchange coil pipe and then flow into an evaporator; a casing pipe is arranged on the outer side of the evaporator; a four-way valve is arranged on an inlet of the casing pipe and is connected to an exhaust outlet of the heat exchange coil pipe, an inlet of the casing pipe, a first ventilation pipe and a second ventilation pipe; and an air blower is arranged on the second ventilation pipe, and a plurality of turbulent flow plates are arranged in the casing pipe. The composite system can overcome shortcomings in the prior art, and the waste heat utilization rate of high-temperature tail gas is improved, and meanwhile the structure of a defrosting device is simplified; and reliability of running of equipment is improved.

An eccentric damper system for an automobile air conditioner, comprising an air-conditioning box body and an air-conditioning damper arranged inside thereof. The air-conditioning box body is provided with a thermal upper limiter, a hot lower limiter, a cold upper limiter, and a cold lower limiter. The air conditioner The damper is a curved structure, including a hot air plate and a cold air plate. The hot free end of the hot air plate moves steplessly between the upper heat limit platform and the lower heat limit platform, and the cold free end of the cold air plate moves between the upper cold limit platform and the cold There is a stepless movement between the lower limit platforms. The hot rotating end of the hot air plate is connected with the cold rotating end of the cold air plate to form a plate-to-plate joint. The two ends of the plate-to-plate joint are respectively connected to the bottom of the inner and outer wings. The tops of the inner and outer wings are respectively hinged with one end of the inner and outer shafts, and the other end of the inner shaft is connected with the bottom case, and the inner wing, the outer wing, and the plate-to-plate joint form a concave expansion wind. road. This design can not only increase the passage area of ​​the hot air channel, but also has a faster heating speed.

An air purifier convenient for filter screen replacement comprises a casing, an air inlet, a filtering device, a fan and an air outlet. The filtering device comprises frame fixing portions, a first frame, a second frame, blades and a third filter screen. The frame fixing portions are fixed to opposite sides of the inner wall of the casing, one side of the first frame is connected with one side ofthe second frame through a rotating shaft, and the blades are fixed to the contact surface of the first frame and the second frame at equal intervals. When the first frame and the second frame are closed by the rotating shaft, the third filter screen is clamped between the blades of the first frame and the second frame; a filter screen replacement door is formed in one side, not provided with theframe fixing portions, of the casing. Through opening and closing of the first frame and the second frame, the third filter screen can be freely put in and fastened or easily taken out, thereby beingconvenient to replace.

The invention relates to a cleaning sieve of a combined harvester, in particular to a cleaning sieve and a combined harvester with the same. Multiple sieve bars are parallelly arranged on a sieve piece of the cleaning sieve in the longitudinal direction, each sieve bar is provided with bending portions which are each provided with a bending angle, first bending portions and second bending portions are arranged on each sieve bar in a spaced mode in the length direction, and the opening direction of the bending angle of each first bending portion is opposite to that of the bending angle of the corresponding second bending portion; the bending angles of the first bending portions are bent upwards, and a first included angle is formed between each first bending portion and the sieve piece plane; for every two adjacent sieve bars, the first bending portion of one sieve bar is overlapped with the second bending portion of the other sieve bar, and the two ends of the bending angle of the first bending portion are fixedly connected with the second bending portions respectively. The cleaning sieve has the advantages of being simple in structure, low in cost, light in weight, convenient to make and install, high in reliability, long in service life, high in cleaning capacity, good in cleaning effect and the like.

The motorcycle silencer installed at the gas exhaust port of motorcycle includes three silencing cavities, the first one, the second one and the third one between the first one and the second one, and partition plates between each two silencing cavities. The partition plate between the second cavity and the third cavity is provided with ventilation holes, the first cavity has its air inlet connected to the exhaust pipe and a length of 1 / 3-1 / 2 total length of the silencer, the first cavity and the second cavity are connected via ventilation pipe through the third cavity, and the third cavity is provided with ventilation pipe through the second cavity and stretched beyond the silencer. Compared with available technology, the motorcycle silencer of the present invention has great amount of spoil, full chemical reaction of waste gas, increased gas flow area, less vibration, less exhaust and low noise.

The invention discloses an eccentric air door system of an automobile air conditioner, comprising an air conditioner box body and an air conditioner air door arranged in the air conditioner box body,wherein a heat upper limiting table, a heat lower limiting table, a cold upper limiting table and a cold lower limiting table are arranged in the air conditioner box body, and the air conditioner airdoor is of a curved structure and comprises a hot air plate and a cold air plate; the hot free end of the hot air plate moves steplessly between the heat upper limiting table and the cold upper limiting table; the cold free end of the cold air plate moves steplessly between the heat upper limiting table and the cold upper limiting table, and the hot rotating end of the hot air plate is connected to the cold rotating end of the cold air plate to form a plate-plate connecting part; the two ends of the plate-plate connecting part are connected to the bottom of the inner wing plate and the bottomof the outer wing plate respectively, the top of the inner wing plate and the top of the outer wing plate are hinged to one end of an inner rotating shaft and one end of an outer rotating shaft respectively, the other end of the inner rotating shaft is connected to a bottom shell, and the inner wing plate, the outer wing plate and the plate-plate connecting part form a concave expanding air duct.Through the design, the passing area of a hot air channel can be increased, and a temperature rising speed is high.

The liquid-based cell extraction filter screen comprises a mounting cylinder, a fixed cylinder is slidably connected to the interior of the mounting cylinder, and a primary filter screen, an intermediate filter screen and a precise filter screen are sequentially arranged in the fixed cylinder from top to bottom; by arranging the primary filter screen, when filtering is carried out, filtrate firstly passes through the surface of the primary filter screen, the passing area of the filtrate is increased due to the fact that the surface of the primary filter screen is a curved surface, meanwhile, the filtrate flows towards the periphery along the curved surface, and then the filtrate is dispersed, so that filtered cells are prevented from being accumulated on the surface of the primary filter screen; the primary filter screen, an intermediate filter screen and a precise filter screen are arranged, so that filtrate dispersed by the primary filter screen further sequentially passes through the intermediate filter screen and the precise filter screen, cells of different levels in liquid-based cells are filtered step by step, the liquid-based cells are filtered more sufficiently, and the filtering efficiency of the liquid-based cells is improved. The effect of fully filtering is achieved.

The invention relates to the technical field of the filling cabin, and particularly discloses a loading device of a powder-like seasoner. The loading device of the powder-like seasoner comprises a rack and a cone hopper. The hopper is installed at the upper end of the rack. The loading device of the powder-like seasoner further comprises an elliptic material box and a press roller. The rack is internally provided with a circular containing chamber. The material box is rotatably connected to the rack and is positioned in the containing chamber. The long end of the elliptic material box is tangent with the inner wall of the circular containing chamber. Two long ends of the material box are provided with a feed port and a discharge port. Each of the feed port and the discharge port is provided with a one-way valve. The upper end of the containing chamber is provided with a feeding opening, and the lower end of the containing chamber is provided with a discharging opening. The press roller is rotatably connected to the rack and is positioned in the material box. The roll surface of the press roller is tangent with the short end of the inner wall of the elliptic material box. The press roller and the material box are capable of, through using the coordination of circular and elliptic reversing rotation, realizing the crushing and sorting of the material, improving the granularity of the material, avoiding the blocking of a cup caused by accumulated material block on the one hand, and improving the taste of the food on the other hand.

A compound energy-saving cathode for electrolytic manganese includes a stainless steel plate and a handle connected with the stainless steel plate, wherein the handle is formed by connecting a stainless steel bar part and a compound material part; and the compound material part is formed by welding and compounding the stainless steel bar and a copper bar through explosion. The compound energy-saving cathode effectively saves copper materials, reduces the resistance of the cathode, effectively saves energy and reduces consumption, and improves the economical benefits.

The invention relates to a steel-making dedusting ash filter. The steel-making dedusting ash filter comprises a transporting dust-absorption vehicle dust-absorption hose, a main pipe dedusting ash pipe, a main pipe dedusting ash cleaning bin door, a main pipe, a dust-absorption hose joint, a dust-removing pipe joint, a main pipe dedusting ash filter net storing groove, and a main pipe dedusting ash filter net, the transporting dust-absorption vehicle dust-absorption hose is connected with the dust-removing pipe joint of the main pipe dedusting ash pipe through the dust-absorption hose joint, the main pipe dedusting ash pipe is connected with the main pipe, the main pipe dedusting ash cleaning bin door is arranged between the main pipe dedusting ash pipe and the main pipe, and the main pipededusting ash filter net storing groove is formed in the lower portion of the main pipe dedusting ash cleaning bin door. The area of dedusting ash passing is increased through the filter net, the larger parts of the discharged dedusting ash particles is filtered by using the gravity, the large-particle dedusting ash accumulated in the filter net is detected and cleaned up through a moving bin door, and the steel-making dedusting ash filter is simple in structure, convenient to repair and use, and low in manufacturing cost.

The invention discloses an in-situ chemical injection method. The in-situ chemical injection method comprises: feeding a drill bit to a specified depth through a drill pipe, lifting the drill pipe to be separated from the drill bit to form a chemical supply channel, and injecting a chemical into a specified position via the chemical supply channel. Meanwhile, the present invention discloses a device for implementing the method; the device comprises a drill pipe and a drill bit; the drill bit comprises a working section in contact with ground, a tail section inserted into the drill bit, and a working platform located between the working section and the tail section and used for bearing the pressure of the drill pipe; the drill pipe has a feed state of propping against the working platform and a chemical injection state of being separated from the drill bit; in the chemical injection state, a gap between the drill pipe and the drill bit forms a chemical supply channel. The in-situ chemical injection device is provided with the annular and adjustable chemical supply channel that is large in passing area and not prone to blockage; due to the design of a detachable retainer ring and an extension sleeve, the in-situ chemical injection device is applicable to different working environments and wide in application range; further, due to the design of integrated well drilling and chemical supply actions, convenient operations can be realized.

The invention aims at providing a filter screen which is assembled in a compressor to prevent the pressure loss increase of refrigerant agent caused by the passing area reduction of the filter screen, and prevent the reduction of the compressor performance. The inventive sealed compressor for the refrigerant agent of an air conditioner or a refrigeration machine includes a compressing mechanism, a bearing member (10) for bearing the compressing mechanism, a box (2) for receiving a motor (20) for driving the compressing mechanism, wherein a suction inlet for sucking the refrigerant agent gas which is guided by piping to the box from the refrigerant agent is arranged on the box, the suction inlet of the box is provided with the filter screen (19) which has larger outer diameter than that of the piping for sucking the refrigerant agent, and a fixed flange, the filter screen is fixed on the box for connecting a connection flange (24) which integrates with the piping for the suction of the refrigerant agent with the fixed flange.

The invention provides an efficient filtering and deashing device with an inner-cone double-layer filter cartridge, which comprises an outer filter cartridge (1), an inner-cone filter cartridge (2), a double-slit blowing pipe (3), a mounting cover (4), a sealing cover (5) and an oblate sphere (6), the mounting cover (4) is mounted at the top of the outer filter cartridge (1), the sealing cover (5) is mounted at the bottoms of the outer filter cartridge (1) and the inner-cone filter cartridge (2), the oblate sphere (6) is mounted at the top of the inner-cone filter cartridge (2), and the double-slit blowing pipe (3) is connected with the oblate sphere (6). The double-slit blowing pipe (3) is vertically mounted at the upper part of the oblate sphere (6); the filtering surfaces of the outer filtering cylinder (1) and the inner conical filtering cylinder (2) are of a wrinkle structure with triangular wrinkles (7) and short flat wrinkles (8) at intervals; and an air flow connecting pipe (10) and a flow guide connecting pipe (11) of the double-slit blowing pipe (3) are connected with a high-pressure air flow pipe (9) and respectively lead to a lower blowing pipe cover (12) and a blowing pipe body (13). The device has the advantages of large filtering area, large pulse gas flow, high ash removal efficiency and the like.