78results about How to "Improve emission efficiency" patented technology

The invention discloses a variable exhaust port device of a two-stroke engine, and aims to overcome the defects that in the prior art, although an exhaust hole with a variable opening size is formed in the two-stroke engine, the exhaust efficiency of waste gas is still limited and needs to be further improved when the engine runs at a high speed. According to the technical scheme, a main exhaust hole and an auxiliary exhaust hole are formed in the inner side wall of an air cylinder body, a main exhaust valve for controlling the opening size of the main exhaust hole is arranged in the main exhaust hole, and an auxiliary exhaust valve for controlling the opening size of the main exhaust hole is arranged in the auxiliary exhaust hole; the main control assembly controls the opening size of the main exhaust valve; the auxiliary assembly is connected with the main control assembly and controls the opening size of the auxiliary exhaust hole; wherein the auxiliary exhaust valve is in a normally closed state, and the main control assembly drives the auxiliary assembly and controls the auxiliary exhaust valve to open the auxiliary exhaust hole.

The invention belongs to the technical field of heterojunction bipolar transistors, and particularly relates to a heterojunction bipolar transistor and an MOCVD epitaxial growth method thereof. The heterojunction bipolar transistor provided by the invention comprises a transition layer arranged between a base region and an emission layer, and the MOCVD epitaxial growth method comprises the step of growing the transition layer on the surface of the base region by adopting a linear variable-temperature staged pulse metal organic chemical vapor deposition method, pH3 is continuously introduced within the total growth time of the linear variable-temperature staged pulse metal organic chemical vapor deposition method, and trimethyl indium, trimethyl gallium and silane are introduced in a single-cycle staged pulse manner; and the temperature of the reaction chamber is linearly increased from the base region growth temperature to the emission layer growth temperature within the time from the T1 initial moment to the TN initial moment. The heterojunction bipolar transistor obtained by the method provided by the invention is large in gain, low in sheet resistance and good in reliability.

The invention relates to the field of semiconductor devices and radio wave ranging, in particular to an emission control system suitable for phased array power weighting. Comprising an amplitude phase control unit, a driving amplification unit, a power amplification unit, a power coupling unit, a power detection unit, a low-pass filtering unit, an analog-to-digital conversion unit, a power supply control unit and an isolator unit, the power supply control unit introduces an output signal of the power amplification unit as a feedback signal, generates control word control according to the feedback signal and an input control word initial value, and adjusts the power supply voltage provided by the power supply voltage stabilization unit to generate a dynamic variable VDD as a drain power supply voltage. Various different power outputs are generated under the condition that only one power amplifier is used, and each power output is generated when the power amplifier is in a saturated state. According to the invention, the power amplifier can work in a saturated state, the emission efficiency is improved, and the power amplifier is not easily influenced by temperature fluctuation.

The present invention relates to a nitrogen spring loading force type pressure reducing valve and its preset adjustment device, wherein the valve core comprises: an upper core, a threaded air charging channel is arranged at the top; a connecting gasket is arranged at the inner circumference of the bottom of the upper core; a bellows, a first end of which is fixed to the bottom of the upper core and the connecting gasket; a lower core, a top of which is connected to the second end of the bellows circumferentially, and an air chamber is formed between the upper core, the bellows and the lower core; a guide sleeve is arranged at the middle of the lower core, a sliding elastic structure movably connected to the threaded air charging channel is arranged in the guide sleeve, and an air path connected to the threaded air charging channel is arranged at the lower part of the guide sleeve to fill nitrogen into the air chamber; a valve stem is arranged at the bottom of the lower core, and a lifting valve core is arranged at the bottom of the valve stem. And, an air charging control structure, the output end of which is connected to the threaded air charging channel, the upper part of the upper base is provided with an air charging control structure, and a spherical accommodating cavity is provided between the upper base and the lower base for accommodating the valve core, completely simulating the environment of a spherical pressure reducing valve.

The invention discloses a broadband out-of-phase power amplifier transmitting system based on FPGA, which comprises an FPGA out-of-phase signal generating part and an out-of-phase class E power amplifying part; wherein the FPGA out-of-phase signal generating part comprises an out-of-phase decomposition module, a linear digital interpolation phase modulation module, a single-bit quantizer and a high-speed parallel-to-serial converter; the out-of-phase class E power amplifying part is designed by integrating the class E power amplifier and the out-of-phase power superposition part. The technical implementation of the invention makes the radio frequency front end digital and integrated, the transmitting frequency is flexible and controllable, the realization difficulty of the transmitter is reduced, and the transmitting efficiency of a high peak-to-average ratio signal is improved.

A slab waveguide slot antenna unit provided by the present invention comprises a radiation unit, an excitation unit and a feed unit, the radiation unit comprises a radiation square cavity and a radiation slot, the excitation unit comprises an excitation square cavity and an excitation slot, the feed unit comprises a feed square cavity and a feed slot, and the feed slot is connected with the excitation square cavity. According to the invention, a special radiation slot design is adopted, so that the radiation aperture efficiency is improved, more input energy can be effectively radiated into a free space, and the transmitting and receiving efficiency of the antenna is improved; the antenna comprises the gaps in the excitation square cavity and the feed square cavity, so that the feed structure is simplified, the antenna is easier to manufacture and maintain, and the cost and the complexity are reduced; the simplification of the feed structure also helps to improve the stability and reliability of the antenna. The whole waveguide antenna has axial symmetry, so that manufacturing and adjustment are more convenient. And the axisymmetric structure is beneficial to keeping the symmetry and consistency of the antenna, so that the stability of the performance is improved.

The utility model discloses a resin reaction kettle water vapor removing device which comprises an outer box body, a support is fixedly connected to the outer side wall of the outer box body, a reaction kettle is fixedly connected to the interior of the outer box body, a water storage cavity is formed between the reaction kettle and the outer box body, and a feeding port is formed in the top of the reaction kettle and penetrates through the outer box body. Water vapor removing mechanisms are symmetrically arranged on the left side wall and the right side wall of the reaction kettle, and a bidirectional driving device for driving the water vapor removing mechanisms to operate is arranged on the outer side of the outer box body. Through the arrangement of the water vapor removing mechanism and the bidirectional driving device, the overall operation cost of the device can be lower, a double-shaft motor is installed outside, heat dissipation is easier, and the service life of the device is prolonged; through the arrangement of the exhaust port, the steam is exhausted through the exhaust port, and the fan blades are matched, so that the air circulation between the reaction kettle and the outside is smoother, and the steam exhaust efficiency is improved.

The utility model belongs to fire extinguishing device technical field, specifically is a kind of helicopter external fire extinguishing device, including bucket main part;The upper portion of bucket main part is provided with annular support plate, annular support plate is provided with air pump, the bottom of bucket main part is hingedly connected with barrel bottom cover, the lower portion of bucket main part is provided with drainage magnetic valve, the inboard of bucket main part is provided with lining support, lining support is provided with mixing mechanism, multiple lining supports are vertically and uniformly provided with reinforcing ring stand, mixing mechanism includes the air pipe support setting in annular support plate, air pipe support includes multiple annular air pipes vertically and uniformly arranged, multiple air mixing elements are uniformly provided on annular air pipe, one group of through pipes is respectively arranged between multiple annular air pipes, air pump is provided on annular support plate, connecting pipe is provided on air pump, the other end of connecting pipe is provided with arc shunt pipe, the lower end of arc shunt pipe is connected with the uppermost annular air pipe, it can mix uniformly fire extinguishing agent and liquid in the bucket.

The present invention relates to the technical field of emission control, and in particular to an emission control method, system and medium for medical radioactive waste liquid, which are applied to N decay tanks connected in sequence, wherein valves are arranged at the ends of the N decay tanks; the method comprises: averaging a plurality of actual emission amounts and adding a redundant emission amount to obtain an expected emission amount; calculating the capacity of a single decay tank and the divisor of the expected emission amount, and determining an ideal temporary storage period according to the decay time threshold, the divisor and the emission period; determining an initial temporary storage period of the decay tank according to the activity range of the decay tank, adjusting the radioactive waste liquid in the decay tank within the activity range of the decay tank, so as to adjust the initial temporary storage period of the decay tank to an ideal temporary storage period; controlling the N decay tanks to sequentially open corresponding valves every other ideal temporary storage period to discharge the radioactive waste liquid; the present invention can improve the emission efficiency of radioactive waste liquid.

The present invention provides a reciprocating ejection type UAV carrier vehicle, which includes a vehicle body, a launching platform, a sliding block, a first sliding rail, a fixed pulley, a locking mechanism, a winding mechanism, a feeding device, a locking mechanism, etc. The vehicle body has the advantage that, in the process of the vehicle body moving back and forth, the kinetic energy of the vehicle body itself can be used to provide elastic potential energy for a torsion reel to eject the UAV, thereby eliminating the need for the additional installation of an expensive ejection power device, and two UAVs can be launched in one reciprocating cycle, thereby improving the launching efficiency.

This utility model belongs to the field of kiln heat recovery, specifically a flue gas waste heat recovery kiln preheating device, including a kiln body. A door panel is rotatably connected to one side of the kiln body, and a heating pipe is fixedly connected to the top of the kiln body. A vibration mechanism is provided at the other end of the heating pipe. The base of the vibration mechanism plays a major supporting role, and the top cover can improve the emission efficiency of high-temperature flue gas. The high-temperature flue gas passes through a purification component to filter impurities and dust in the gas. The heat exhaust pipe can be connected to external equipment through a flange, and the filtered high-temperature flue gas is transported to the required equipment through the heat exhaust pipe. When the cam rotates continuously, the protruding part can push the box to vibrate continuously through rollers and extension rods. The spring between the box and the base can improve the vibration effect, vibrating and removing the impurities and dust particles filtered in the purification component, ensuring the filtration efficiency of the purification component.

This invention belongs to the field of laser technology, specifically relating to a common-cathode multi-beam laser, comprising a cathode assembly, multiple anode assemblies, an optical resonant cavity assembly, and a power supply module. The power supply module is electrically connected to both the cathode and anode assemblies, providing operating voltage to them. Multiple anode assemblies are spaced apart above the cathode assembly. The optical resonant cavity assembly, positioned above the anode assemblies, includes multiple mirrors and an output mirror. Each mirror corresponds to one of the anode assemblies, forming multiple independent optical resonant cavities together with the output mirror. The common-cathode design allows multiple anode assemblies to share the same cathode, greatly simplifying the laser structure and significantly reducing the device size and production costs compared to traditional multi-beam lasers with multiple independent laser units.

The application discloses a double-fan-leaf suction-discharge structure of a centrifugal fan, and belongs to the technical field of centrifugal fans. The double-fan-leaf suction-discharge structure comprises an impeller, a volute, an air inlet, an air outlet, a motor, a connecting shaft, a bearing and a flow guide channel. The impeller is designed in a double-fan-leaf mode and comprises centrifugal blades and axial-flow blades. The impeller is located in the interior of the volute, and the interior of the volute is further provided with the flow guide channel. The application has novel design and ingenious device. The double-fan-leaf suction-discharge structure is arranged in the interior of the impeller shell and comprises centrifugal blades and axial-flow blades. The external gas is guided to enter the gap between the centrifugal blades in an orderly manner, the axial air suction capacity is improved, the phenomenon that the air pushed by the centrifugal blades overflows along the axial direction is inhibited, and thus the generation of backflow is reduced. The flow guide channel is arranged, the main channel changes from narrow to wide from the air inlet to the air outlet, the entering gas can be stably transported from the air inlet to the air outlet under the action of the main channel, the gas discharge efficiency is improved, and the discharge capacity is increased.

The invention belongs to the technical field of carbon quota allocation, discloses a traffic carbon quota allocation method and system based on a spatial SEE model, and aims to allocate carbon emission quotas according to the average population proportion of each province in a reference period and tilt the quotas to provinces and cities with more population in jurisdictions. The distribution mode not only reflects the actual population demand of each province and city, but also ensures that the carbon emission right can be distributed nationwide more fairly, the uneven resource distribution caused by the population scale difference is avoided, the investment-oriented ZSG-DEA model is adopted to carry out efficiency evaluation on the traffic carbon emission of each province in China, and the efficiency of the traffic carbon emission of each province in China is improved. And redistributing the carbon dioxide emission of the invalid DMU so as to realize the optimization of the carbon emission efficiency of each province. According to the invention, through scientific, reasonable and overall carbon quota distribution, the emission reduction task can be effectively decomposed, the realization of a dual-carbon target is promoted, and local governments are guided to clarify respective emission reduction targets and development positioning so as to formulate corresponding policies.

The present application relates to a flood control road structure, which is related to the field of municipal roads, and includes a base and a plugging member, wherein a water-permeable layer and a supporting layer are provided on the base, a cavity is provided in the supporting layer, a floating block is provided on the plugging member, and a main flow channel and a secondary flow channel are provided on the plugging member. The drainage efficiency of the road can be adjusted according to the amount of rainfall, and when the rainfall is large, the main flow channel and the secondary flow channel are used to discharge the accumulated water in a coordinated manner, thereby improving the water seepage performance and water seepage efficiency of the road, reducing the situation of water accumulation on the road, improving the flood control performance of the road, and reducing the splashing of accumulated water when pedestrians or vehicles pass by, which has a splash-proof effect.

The invention discloses an unmanned aerial vehicle container continuous launching device based on friction wheels, and relates to the technical field of unmanned aerial vehicle launching. The problems that in the prior art, friction wheel driving efficiency is insufficient, continuous launching supply is difficult, and an unmanned aerial vehicle is damaged are solved. Comprising a container forming a launching system frame, a first transportation carrier used for transferring the unmanned aerial vehicle in the container, a second transportation carrier used for bearing the unmanned aerial vehicle in the launching stage, a friction wheel launching mechanism providing launching power and an unlocking mechanism achieving separation of the unmanned aerial vehicle and the carriers. The stability of friction wheel launching and the cluster continuous launching efficiency are improved, the storage, transfer and launching functions of the unmanned aerial vehicle are highly integrated, and the method is suitable for scenes with extremely high deployment speed requirements.

This invention relates to the field of oilfield development technology, and more particularly to a composite sand-control oil-gas separator with automatic adjustment of oil and gas levels. It includes: a shell; an inlet pipe fixed to the lower part of the shell, with a sand-control shell at the inlet end and a gas monitoring module inside the inlet pipe; a connecting shell fixed to the shell, with a fixed shell fixedly connected and communicating with its upper side, and a movable shell slidably and sealingly connected to the outer side of the fixed shell; and a connecting rod fixed to the connecting shell, with a helical blade fixedly connected to it, the helical blade being fixedly connected to the fixed shell. This invention adjusts the position of the oil on the movable shell by changing the position of the movable shell when the oil-gas ratio changes, thereby optimizing the oil-gas separation efficiency, improving the gas-liquid separation effect and stability, and enhancing the overall adaptability of the device to fluctuations in downhole fluid composition.

The utility model discloses an environmental protection type efficient wastewater discharge facility relates to wastewater discharge field, including the ground erects the pipeline, the top of ground erects the pipeline and is provided with first protection groove, the outer wall of ground erects the pipeline and is provided with second protection groove, the bottom of second protection groove is installed with base. The utility model discloses an environmental protection type efficient wastewater discharge facility, through setting up ground erects the pipeline, and through first protection groove and second protection groove, based on this adjustable height base of bottom, can effectively reduce the environmental risk of pollutant emission process, when discharging, through ground erects the pipeline and the tee pipe and directly enters the total discharge, wherein can switch to the emergency accident pool, so that the probability of abnormality of the discharging link greatly reduces, realizes better environmental performance, ground erects the pipeline and can effectively transport wastewater to the designated discharge port, and the layout is reasonable, and the discharge time is short, and the wastewater quality of discharging is little affected by external interference.

The forage storage and compaction device comprises an extrusion chamber, a stock bin is arranged above the extrusion chamber, a pressing plate capable of moving towards the other end is arranged at one end of the extrusion chamber, a pushing chamber is arranged at the other end of the extrusion chamber, a discharging port is formed in the front end of the pushing chamber, a pushing plate sliding towards the discharging port is arranged at the rear end of the pushing chamber, and the pressing plate and the pushing plate are driven by a hydraulic cylinder. A plurality of rectangular openings are formed in the bottom wall of the extrusion chamber, partition plates are vertically fixed to the front end and the rear end of the extrusion chamber, seepage channels are formed between the partition plates and the side walls of the extrusion chamber, the seepage channels are communicated with the openings, and pore plates are fixed to the openings and the partition plates. According to the forage storage and compaction device, the partition plate is arranged on the side wall in the extrusion chamber so that the seepage channel can be formed in the side end, in the process that forage is pushed and extruded into briquettes, percolate extruded out of the periphery of the forage can be rapidly discharged into the seepage channel from the pore plate on the partition plate, the discharging efficiency of the percolate is improved, and the forage storage and compaction efficiency is improved. And the waiting time from briquetting to bagging is shortened.

The utility model relates to medical instrument technical field, concretely is a specimen soaking device for pathological department, including jar body, support plate and tablet, its characterized in that, the support plate is inserted in the inside of jar body, the top of jar body is connected with the cover body of screw thread, the top of support plate is established with a plurality of water holes, the edge department of support plate top is fixedly connected with a plurality of stand, the outer surface of stand is established with a plurality of clamping grooves along its height direction, the outer surface of tablet is fixedly connected with a plurality of pressure rod, the top of pressure rod far away from tablet one end is established with the insertion hole. Advantages are that: the pathological specimen is placed in the top of support plate, then the pressure rod is through the insertion hole and is put on the outer surface of stand, and the pressure rod is slid down, makes it and press in the top of pathological specimen, then through the rotation pressure rod, makes the clamping block through the sliding slot and is clamped in the clamping groove of stand surface, finally puts the support plate into the jar body that is equipped with the soaking liquid, and can be connected with the cover body of screw thread in the top of jar body, and the operation is simple, saves time and labour.

The utility model relates to the technical field of oily water recovery, disclose a kind of adjustable type blow-off anti-spray device of compressor, including inner tube, reflector and body, inner tube and body are tubular parts, inner tube is set in body one end and is inserted into body interior, reflector is slidably arranged on inner tube, body and inner tube connection end are provided with first discharge port, the inside of body remote from inner tube end is sequentially provided with labyrinth section and second discharge port from top to bottom.The body interior adopts labyrinth structure and the umbrella-shaped capture board with small hole, the top of inner tube is provided with the reflector of height-adjustable, the depth of inner tube adjustable insertion body, to change the intensity and speed of liquid injection according to the height of pressure.Through this structure, the mixed liquid into the device can go its own way, lighter gas flows out from the top, and the liquid after decompression flows out from the bottom of the device, thereby avoiding the pollution of surrounding environment caused by the splashing of liquid under pressure.

The utility model discloses a sewer residue filtering device which comprises a machine body, a filtering piece, a water inlet pipeline and a water outlet pipeline, the top of the machine body is covered with an opening and closing cover plate, the machine body is provided with a filtering cavity, the filtering piece is placed in the filtering cavity, the machine body is provided with a reset bolt piece, and the filtering piece is provided with a bolt seat corresponding to the reset bolt piece. The reset bolt piece is inserted into the bolt seat; the water inlet pipeline and the water outlet pipeline are communicated with the machine body. The filter has the beneficial effects that as the machine body is in inserted connection with the bolt seat arranged on the filter part through the reset bolt part, when a worker needs to take out waste residues in the filter part, the worker only needs to pull the reset bolt part and pull out the reset bolt part from the interior of the bolt seat, and the purpose of separating the filter part from the machine body can be achieved; and the opening and closing cover plate arranged at the top of the machine body is opened, so that the filtering piece can be easily taken out of the filtering cavity, the design is simple to disassemble, and a worker can conveniently clean the filtering piece.

To improve the emission efficiency of ultraviolet light emitting diodes in the Far-UVC wavelength range, the ultraviolet light emitting diode 100A in the embodiment of the present disclosure has an AIGaN-based crystal or an InAIGaN-based crystal, and comprises an light emitting layer 134, a spacer layer 136A, an electron blocking layer 138 in this order along the electron flow, wherein the Al composition ratio in the spacer layer varies along the position in the thickness direction of the layers. Simultaneously or optionally, the ultraviolet light emitting diode of the embodiment of the present disclosure is provided with the emitting layer 134 comprising at least one barrier layer 13B and at least two quantum well layers 13W sandwiching the barrier layer, wherein the barrier layer is configured as a thinned layer.

The utility model discloses a circulating water cooling tower system, which relates to the technical field of cooling towers and comprises a cooling tower, and a plurality of spraying components are uniformly arranged at the upper end in the cooling tower; a first water tank is arranged below the cooling tower, a second water tank is integrally arranged at the end, away from the cooling tower, of the first water tank, and the second water tank communicates with the first water tank through a plurality of through grooves. The cooling tower comprises a tower body, and two fan assemblies are evenly arranged on the top of the tower body. A water collector is arranged at the upper end in the tower body; hot water sprayed by the multiple spraying nozzles falls into the filler and falls into the first water tank along gaps of the filler, and the hot water can be rapidly cooled in the process of flowing through the filler; hot water can generate a large amount of high-temperature water vapor in the tower body, the high-temperature water vapor can condense water drops on the surface of the water collector, the water drops can fall into the first water tank, water recovery is achieved, and water loss is reduced. The cooling effect of the cooling tower is ensured.

The present disclosure relates to a resonant frequency correction device, a reversing radar alarm system and a ranging system, and the device includes: a bandpass sampling module, a down-conversion filter module, and a frequency deviation detection module. Through the above device, the embodiment of the present disclosure can perform bandpass sampling and filtering on the received ultrasonic signal to obtain a complex baseband signal, perform frequency deviation detection on the complex baseband signal to obtain the first carrier frequency deviation of the complex baseband signal, and use the first carrier frequency deviation and the complex baseband signal to determine the second carrier frequency deviation, and use the preset transmission frequency of the ultrasonic transmitter and the second carrier frequency deviation to determine the resonant frequency of the ultrasonic transmitter, so as to perform frequency correction on the ultrasonic transmitter. By correcting the actual resonant frequency of the ultrasonic transmitter, the frequency drift problem can be solved to improve the transmission efficiency, reduce the influence of the carrier frequency deviation, and thus improve the ranging accuracy.

The invention relates to the technical field of condensate water collection and treatment, and discloses a methane torch condensate water collection device which comprises a torch body, an air blower connected with the torch body through a pipeline and a controller installed on the front face of the torch body. Through the innovative design of the 180-degree fan-shaped collecting hoppers and the cooperation of the filter cartridge and the two collecting hoppers, the double-cavity integrated structure of the filter cartridge is utilized, namely the top of the inner cartridge of the filter cartridge is an inverted conical opening, a detachable filter screen is arranged in the filter cartridge and used for intercepting and collecting solid particles in condensate water, and the bottom of the inner cartridge of the filter cartridge is an inverted sharp conical opening, so that the solid particles in the condensate water can be effectively collected. The bottom of the collecting barrel is communicated with a blow-off pipe, so that filtered condensate water can be discharged out of the collecting barrel; and on the other hand, the bent pipe designed between the filter cartridge and the two collecting hoppers adopts an arc-shaped structure, so that the gas flowing resistance is reduced, the condensate water discharging efficiency is improved, the collected condensate water can flow to the filter cartridge more quickly, and the collecting performance is further improved.

The invention discloses a large-caliber overload carbon dioxide launching device, and relates to the field of carbon dioxide launching equipment, and the large-caliber overload carbon dioxide launching device specifically comprises a gun barrel assembly, a primary containing chamber assembly and a buffer assembly; the gun barrel assembly is provided with a projectile body placement space, and the projectile body placement space is used for containing a to-be-launched projectile body; the primary containing chamber assembly is connected with the gun barrel assembly and communicates with the projectile body placement space; the primary containing chamber assembly comprises a cracker outer cylinder and a plurality of CO2 crackers arranged in the cracker outer cylinder, and the primary containing chamber assembly is used for releasing carbon dioxide gas; a mounting space of the primary containing chamber assembly is formed in the middle of the buffer assembly; the buffering assembly comprises a plurality of sets of buffering parts matched with one another, and each buffering part is arranged on the outer barrel of the fracturing device in a sleeving mode and used for absorbing recoil generated when the carbon dioxide gas released by the primary containing chamber assembly pushes the projectile body to be launched. The device can effectively improve the launching efficiency, the launching reliability and the safety of the projectile body.

The application provides a gas control device, which comprises a gas storage tank, a switch assembly and a control assembly. The gas storage tank stores compressed gas and is provided with a gas outlet. The switch assembly is arranged on the gas storage tank and opposite the gas outlet. The control assembly is connected with the switch assembly and controls the working state of the switch assembly, thereby controlling the discharge of the compressed gas from the gas outlet. The gas control device provided by the application can realize the timed and quantitative release of the compressed gas by arranging the switch assembly and the control assembly on the gas storage tank in cooperation, thereby providing balanced and stable output. The application further provides an injection device.

The utility model provides a drainage device for a vacuum drainage system, which comprises a tank body, a conveying assembly, a filtering assembly and an observation assembly, and is characterized in that impurities in sewage are filtered by arranging a filter screen frame, so that the blockage caused by the accumulation of garbage in the vacuum drainage device is effectively avoided; meanwhile, when impurities are accumulated and block the bottom of the filter screen frame, the filter holes in the side face of the filter screen frame can also discharge and filter sewage, the number of times of cleaning the filter screen frame is reduced, the sewage discharge efficiency is improved, the sewage discharge pressure is relieved, the impurity accumulation condition and the sewage amount are observed by arranging an observation window, and the sewage discharge efficiency is improved. After more garbage is accumulated, the filter screen frame is cleaned, sewage flow decline caused by garbage accumulation is effectively prevented, normal sewage discharge is guaranteed, the vacuum drainage device is more reliable, meanwhile, the water quantity can be observed, the condition of dry rotation of the water pump is avoided, and the service life of the water pump and the service life of the vacuum drainage device are prolonged.