46results about How to "Reduce loss along the way" patented technology

The invention discloses a direct-drainage vacuum pre-pressing groundwork treatment method, which comprises: a main pipe is arranged in a vacuum device, a plurality of branch pipes are divided from the main pipe, each branch pipe is connected to a drainage plate through connection pipe to directly draw out the water inside the drainage plate. The treatment method of the invention avoids the use of horizontal drainage sand pad layer, vacuum filtrate pipe and film, and directly connects the plastic drainage plate in soft groundwork with the vacuum pipe by use of connection pipes, thereby greatly reducing the vacuum pressure transmission loss, improving vacuum transmission effect and strengthening effect, and lowering consolidating cost.

The invention discloses an integrated type energy-saving and environment-friendly hydraulic servo system, and belongs to the technical field of machinery assemblies. The integrated type energy-saving and environment-friendly hydraulic servo system comprises a computer, a data collecting part, a power output control part, a one-way valve set, a connecting block and an executing unit. The data collecting part comprises a force sensor, a pressure sensor and a temperature sensor. The power output control part comprises a hydraulic pump, a servo motor and an oil tank. The one-way valve set comprises a first one-way valve and a second one-way valve. An oil channel is placed inside the connecting block. A hydraulic cylinder is adopted in the executing unit, and is composed of a pressurizing cavity, a pressure releasing unit and a piston rod. The computer is connected with the force sensor, the pressure sensor and the temperature sensor. The servo motor is connected with the computer and the hydraulic pump, the hydraulic pump is installed inside the oil tank, and the servo motor is installed outside the oil tank. The oil tank is fixedly connected with a hydraulic cylinder body through the connecting block in a sealing mode, the hydraulic pump is communicated with the hydraulic cylinder through the connecting block, the oil inlet ends of the one-way valves are communicated with the oil tank, and the oil outlets of the one-way valves are communicated with the hydraulic pump.

The invention relates to a multifunctional expandable energy-saving hydraulic pressure integrated circuit, which is composed of two sets of hydraulic pipelines arranged perpendicular to each other and an electronic control unit, wherein each set of hydraulic pipelines is composed of n parallel hydraulic pipelines (n is equal to or greater than 2) at least; the two sets of hydraulic pipelines belong to different layers and are overlapped; the hydraulic pipelines arranged longitudinally are referred to as longitudes; the hydraulic pipelines arranged latitudinally are referred to as latitudes; the longitudes intersect and are perpendicular to the latitudes; the longitudinal hydraulic pipelines are connected with pressure sources; the latitudinal hydraulic pipelines are connected with actuators; longitudinal hydraulic pipelines and latitudinal hydraulic pipelines are connected at each intersection point via a two-way cartridge valve; so long as the cartridge valve at each intersection point is opened, the connection of one longitudinal hydraulic pipeline and one latitudinal hydraulic pipeline can be realized; the pressure sources and the two-way cartridge valve are controlled by the electronic control unit. According to the multifunctional expandable energy-saving hydraulic pressure integrated circuit, different circuits can be formed by connecting different latitudes and longitudes by means of opening or closing the two-way cartridge valves in the system, so that real-time expansion of load and oil sources in the system can be realized; through changing cartridge valve components and matching manner of multiple cartridge valves, the circuit has multiple functions.

The invention relates to an internal spiral groove oil suction pipe for a variable-frequency refrigerator compressor, and belongs to the technical field of refrigeration compressor accessories. The internal spiral groove oil suction pipe comprises an oil suction pipe main body and embedded internal spiral grooves, wherein more than one embedded internal spiral grooves which are conical and coaxial with the oil suction pipe main body are formed in the oil suction pipe main body; a cylindrical part of the oil suction pipe main body is fixed through a center hole of a motor rotor, and then connected with the end face of a crankshaft. The internal spiral groove oil suction pipe disclosed by the invention uses an embedded internal spiral groove structure, and is low in oil suction resistance, high in oil pumping capacity, good in lubricating effect, low in linear loss, and long in service life; the compressor is stable and reliable in working; the oil suction pipe main body is fixed through the center hole of the motor rotor, and then connected with the end face of the crankshaft, so that the oil suction pipe is convenient to assemble and simple in manufacturing technology; the internal spiral groove oil suction pipe solves the problems that the existing oil suction pipe is high in oil pumping resistance and low in oil pumping capacity, and has high probability of causing lubrication failure to severely influence the service life of the variable-frequency compressor as an external thread structure is used, and the oil suction pipe is assembled together with the crankshaft or the motor rotor through a tail sleeve.

The invention discloses an air inlet rice mill with double air sources, which comprises a framework. A rice milling chamber mechanism is arranged in the framework, the lower side of the rice milling chamber mechanism in the framework is connected with a bran suction hopper, the framework at the tail end of the rice milling chamber mechanism is connected with a rice milling discharging mechanism, the rice milling chamber mechanism comprises a spindle, a rice milling roller, a rice sieve component, a feeding hopper and a conveying mechanism, the spindle is connected with the rice milling roller, the rice sieve component and the feeding hopper are arranged in the framework, the spindle in the framework is connected with the conveying mechanism and a transmission and is a hollow structure, a partition board is disposed in a hollow cavity of the spindle, an air spraying hole is arranged on a spindle wall at one end of the partition board, a spindle section with the air spraying hole is connected and communicated with an air spraying fan, an air suction hole is arranged on a spindle wall at the other end of the partition board, a spindle section with the air suction hole is communicatedwith the atmosphere, and an air spraying section and an air suction section are formed on the spindle. The air inlet rice mill is compact in structure and fine in stability.

The invention belongs to the technical field of foundation treatment of geotechnical engineering and provides equipment for strengthening a deep soft soil foundation by vacuum preloading of a filter well and a method. The equipment comprises the filter well, a vacuum device, a sealing structure, a grouting device and a connecting pipeline, wherein the vacuum device is connected to the upper end of the filter well through the connecting pipeline; the sealing structure is used for ensuring sealing of the whole equipment during vacuum preloading operation; the filter well is formed by combining a sand well and a vacuum pipe; the vacuum pipe is formed in the middle part of the sand well and is composed of a plurality of sections of PVC pipes and a plurality of sections of filter pipes; and the grouting device is used for filling cement-clay grout into a pore of the filter well by the vacuum pipe of the filter well to form a cement mortar pile after vacuum preloading is finished. The equipment can reduce the route loss of the vacuum degree of the filter well to make the vacuum degree of the whole section of the filter well keep a high value, so that the whole strengthening effect of the deep soft soil foundation is ensured; and meanwhile, cement mortar is poured into the sand well by utilizing the vacuum pipe to form a cement pile, and thus the bearing capacity of the foundation is dramatically improved.

The invention discloses a hydraulic system of an overflow-loss-free loader and a control method of the hydraulic system. On the basis of an original hydraulic system of the loader, parts like energy accumulators, reversing valves, sensors and a controller are additionally mounted, and part simplification is performed; through corresponding control strategies, matching between output flow of a fixed displacement pump and needed flow of a load (an external load and the energy accumulator) can be realized, overflow loss can be avoided completely, and throttling loss and friction loss can be reduced; potential energy recycled is used for being provided to a steering gear, a multi-pump hydraulic system of the loader is changed into a single-pump hydraulic system, and energy is stored through the energy accumulator, so that pressure buildup time of the hydraulic system and installed power of an engine are reduced, and efficiency of the whole loader is improved. The energy accumulator is utilized to absorb pressure impact, so that stability and reliability of the hydraulic system are improved while fatigue lives of elements are prolonged.

The invention discloses filtering equipment of a self-cleaning dust collector for spinning. The equipment comprises an ash collecting bottle, an annular filter screen is fixedly connected into the ashcollecting bottle; the geometric center line of the filter screen is aligned with the center line of the ash collecting bottle; an air chamber is arranged under the ash collecting bottle; the top ofthe ash collecting bottle is connected with a feeding pipe in a sealing manner; a sliding cavity sealed with the feeding pipe is formed in one section of the feeding pipe; a sliding block is connectedinto the sliding cavity in a sealed and sliding mode. A through hole of which the diameter is the same as that of the feeding pipe is formed in the center of the sliding block in a penetrating manner; the side wall of the sliding cavity is in sealed sliding connection with a first connecting pipe; and the tail end of the first connecting pipe is communicated with the air chamber. When meshes of the filter screen are blocked, backflushing is conducted through waste heat of a motor and changing of the gas flowing direction, so that the filter screen is automatically cleaned, on one hand, the situation that the working environment of a textile mill is affected due to reduction of the dust collection efficiency is avoided, and meanwhile electric energy waste and damage caused by idling of themotor are avoided.

The invention provides a drainage structure for use during sand-drain vacuum preloaded ground treatment. The structure comprises a drainage system and a sealing and vacuumizing system, wherein the drainage system comprises a plastic draining board buried in a soil body. A sand drain is arranged in the soil body along the draining board head on the upper part of the plastic draining board and parallel to the plastic draining board. The draining board head of the plastic draining board is directly connected with a filter tube. The filter tube is buried in the sand drain. The cross section of the sand drain can be in a trapeziform shape, rectangular shape, U-shape or a combined shape of the trapeziform shape, the rectangular shape and the U-shape. The sand in the sand drain can be fine sand, medium sand, coarse sand, gravelly sand or a mixture of the fine sand, the medium sand, the coarse sand and the gravelly sand. The drainage structure reduces loss of the vacuum degree during transmission, increases a vacuum preloaded horizontal drainage channel through a sand drain structure, and has the advantages of low cost, less limitation from the sand source of the coarse sand and low construction period compared with the prior vacuum preloading method.

The invention discloses a same-diameter impeller group, in particular the same-diameter impeller group working by using fluid power. The same-diameter impeller group working by using the fluid power is characterized in that: a flow channel of the same-diameter impeller group is a slowly-wavy flow channel; the slowly-wavy flow channel is correspondingly formed by a multi-scale line blade and a guide blade, and one end of the multi-scale line blade is in tangent fit with that of the guide blade; and rotary angles of a convective flow of a fluid through the guide blade and the multi-scale line blade are 45-degree circular arcs. By the same-diameter impeller group working by using the fluid power, the smooth slowly-wavy flow channel can be maintained, the speed of a fluid pressure is steady, extremely low on-way loss is caused, each group of impellers can simultaneously operate in a better operating state, and higher mechanical efficiency is obtained.

The invention provides an oversized-area efficient energy-saving vacuumizing soft foundation treatment system and a construction method. The system is composed of a vacuumizing device, a gas-liquid separation device, a water collection device and an automatic vacuum data transmission device. The automatic vacuum data transmission device is composed of a vacuum data signal sensor, an automatic vacuum data transmitter and a vacuum data receiver. The vacuum data signal sensor is composed of a pressure induction module and a pressure data collection module. The vacuum data receiver is composed of a wireless signal receiving module and a display module. According to the system, the mode that data are monitored by a worker everyday is changed into the mode that data are automatically transmitted and monitored and technicalization and automation of the construction technique and management are facilitated; the structure that a jet pump and a water storage tank are designed in a split mode is adopted in the gas-liquid separation device, so that the system is transported, repaired and replaced in a soft foundation conveniently, and the defect that the traditional vacuum preloading technology is large in power consumption is overcome by the system.

The invention discloses an anode injection reflux device of a fuel cell engine, and belongs to the technical field of fuel cell engines. The anode injection reflux device of the fuel cell engine comprises: a separator, which is used for separating liquid water and hydrogen, and is equipped with a gas outlet; an ejector, which is used for injecting hydrogen, and is connected with a nozzle at the end, wherein the nozzle comprises a flow guide section, a throttling section and an acceleration section which are connected in sequence, the flow guide section is connected with the end of the ejector,the diameter of the flow guide section is kept unchanged, and the diameter of the throttling section is gradually decreased in the direction close to the acceleration section; the diameter of the acceleration section is gradually increased in the direction away from the throttling section, so that the flow velocity of hydrogen at the joint of the throttling section and the acceleration section isgreater than 340m / s; and an injector, which is coaxially arranged with the acceleration section and communicated with each other, is communicated with the gas outlet, so that hydrogen entering the injector from the acceleration section can be sucked into the hydrogen at the gas outlet. The anode injection reflux device has the advantages that: the loss of hydrogen is small, and the reflux effectis good.

The invention discloses a sampling and focusing composite nozzle device. The sampling and focusing composite nozzle device comprises an upper end cover, an acceleration nozzle assembly, a closing nozzle assembly and a nozzle base, wherein the upper end cover is used for supplying aerosol fluid into the upper end cover, the acceleration nozzle assembly is attached to the upper end cover and is usedfor accelerating aerosol fluid, the closing nozzle assembly is connected to the acceleration nozzle assembly in a matched mode, and the nozzle base is connected to the closing nozzle assembly and isused for spraying the aerosol fluid; an inlet channel is formed in the upper end cover; a first cavity used for sampling is formed between the acceleration nozzle assembly and the closing nozzle assembly, and a sampling hole is formed in the side wall of the first cavity; and an outlet channel used for spraying the aerosol fluid is formed in the nozzle base, and an air inlet channel used for gathering aerosol fluid to the outlet channel is formed between the closing nozzle assembly and the nozzle base. The invention further discloses aerosol direct-writing printing equipment with the samplingand focusing composite nozzle device. According to the sampling and focusing composite nozzle device, the problem of blocking between a collision sampler and a nozzle is solved, and the working efficiency of the aerosol direct-writing printing equipment is improved.

The invention discloses a condenser flow path structure, a condenser flow path control method and an air conditioner, and relates to the field of air conditioners. The condenser flow path structure comprises a first flow path, a second flow path and a four-way valve assembly a, the four-way valve assembly a comprises a first valve pipe, a second valve pipe, a third valve pipe and a fourth valve pipe, and the first valve pipe is in communication with the third valve pipe; a first control valve is arranged on the first valve pipe, the second valve pipe is in communication with the fourth valve pipe, and a second control valve is arranged on the fourth valve pipe; the first valve pipe is in communication with the fourth valve pipe through a first connecting pipe, a third control valve is arranged on the first connecting pipe, the first valve pipe and the second valve pipe communicate with the first flow path, and the third valve pipe and the fourth valve pipe communicate with the second flow path. The number of branches of an internal pipeline of a condenser and flow of each branch are controlled through a control valve, so that the temperature value of each branch is balanced, and the heat exchange performance is improved.

The invention relates to a top cover type cleaning device. The top cover type cleaning device comprises a barrel body, a top cover and a hinged part, wherein a washing cavity is formed in the barrel body; the top cover is hinged to the upper portion of the washing cavity and is used for sealing the washing cavity; a spraying structure is formed on the side, facing the washing cavity, of the top cover, so that the washing device can carry out spraying from the top cover to the washing cavity, and the spraying area and the washing effect formed by the top spraying mode are far superior to thoseof a side spraying mode; one end of the hinged part is fixed with the barrel body, and the other end of the hinged part is fixed with the top cover; and the hinged part comprises a memory alloy hinge,and opening or closing of the top cover can be controlled by controlling opening and closing movement of the memory alloy hinge, so that the loss rate of parts is greatly reduced, automatic opening and closing of the top cover are guaranteed, and experimental consumables are reduced.

The invention provides a sampling device for SO3 in stationary pollution source flue gas. The sampling device comprises a front-section smoke gun, a rear-section smoke gun, a sampling main machine, a sampling head, a front-section smoke gun heater, a rear-section smoke gun heater, an air cooling device, a pitot tube, an air inlet smoke temperature sensor, a quartz filter, a quartz glass lining tube, a quartz condensation tube and a condensation tube outlet smoke temperature sensor. According to the invention, all the components are modularized, so that on-site connection / disassembly is simpler and more convenient, and carrying is convenient; when the SO3 emission concentration is accurately tested, the number of equipment carried during on-site monitoring is reduced, and the complexity of on-site instrument connection and chemical reagent configuration and recovery operation is reduced, so that the sampling efficiency is improved; and flue gas sampling under different temperature conditions is realized. According to the invention, the filterable particulate matters are captured at the foremost end of the sampling device in a manner of preposing the quartz filter, the smoke gun does not need to be cleaned, and only the sampling nozzle needs to be cleaned, so that the cleaning operation after sampling is simplified.

The invention provides an air duct component, an indoor unit and an air conditioner; the air duct component is suitable for electrical equipment, and the air duct component comprises: a fan mounting cavity used for mounting a fan; the air inlet duct that communicates with the fan mounting cavity and is used for air inlet; the air outlet duct that is communicated with the fan mounting cavity, is positioned on one side, close to or far away from the supporting base surface of the electrical equipment, of the fan mounting cavity, and is used for air outlet. The air duct component comprises a first preset plane A perpendicular to a supporting base plane of the electrical equipment, a first preset included angle is formed between the extending direction of the air outlet duct and the first preset plane A, and the first preset included angle is an acute angle. According to the air duct component, the problem that the air supply speed and the air supply distance of an air conditioner provided with a centrifugal fan in the prior art are affected due to the fact that the rotating direction of air outlet airflow is large is solved.

The invention provides a double-self-suction type device for preparing purified water of hydrogen-rich water. The double-self-suction type device comprises a raw water tank, and further comprises a double-self-suction type stirrer, a U-shaped degassing mold and a purified water tank, wherein the raw water tank, a gas dissolved water tank, the U-shaped degassing mold and the purified water tank arecommunicated through a pipeline in sequence; a water pressure gauge and a water valve are arranged on a pipeline for communicating the raw water tank and the gas dissolved water tank; the gas dissolved water tank is internally provided with the double-self-suction type stirrer; a gas storage tank is further connected between the double-self-suction type stirrer and the U-shaped degassing mold inparallel. A degassing part of the double-self-suction type device for preparing the purified water of the hydrogen-rich water adopts a U-shaped degassing pipe; the U-shaped degassing pipe is connectedwith two hollow fiber membranes in series, and gas-liquid separation is carried by adopting a pumping and degassing manner; a degassing membrane with a hydrophobic property does not generate any impurity in a degassing process and a chemical reaction process does not exist; the safety and reliability of a product are ensured. Secondary degassing is formed in the U-shaped degassing pipe in a serial connection manner; meanwhile, an annular part of the U-shaped pipe reduces linear head loss of fluid energy very well and fluid can flow in the pipe at a relatively high flow speed. The flow speed of a water body can be increased and good degassing quality also can be ensued; the water treatment time is extremely shortened.

The invention discloses a hydraulic integral integrated valve block, and belongs to the technical field of hydraulic elements of pneumatic hydraulic hammer systems of engineering machinery. The hydraulic integral integrated valve block is characterized by comprising an oil supply flow passage, high-pressure energy accumulator connectors, oil supply control valve connectors, a hydraulic oil cylinder connector, an oil supplement valve connector, oil return control valve connectors, an oil return flow passage and low-pressure energy accumulator connectors. According to the hydraulic integral integrated valve block, all components of the hydraulic system of a pneumatic hydraulic hammer are integrated into a whole through an oil flow channel and an oil distribution cavity inside, so that the use of connecting pieces is reduced, then the hammer body system is compact in structure, the oil way structure is simplified, on-way loss and local loss of most oil are avoided, and efficient transmission and utilization of hydraulic energy are realized. According to the hydraulic integral integrated valve block, an oil supplementing device is arranged between the oil return flow passage and the oil distribution cavity, then the function of supplementing oil into a hydraulic oil cylinder in the inertia lifting stage of a pile hammer is realized, and thus the problem that the striking energy isreduced due to the fact that too large pressure pulsation is generated in the hydraulic cylinder is avoided. All parts of the hydraulic system are arranged in the hydraulic integral integrated valve block, then direct contact between the parts and the external construction environment is avoided, and thus the service lives of all the parts are indirectly prolonged.

The invention relates to supersaturated dissolved oxygen equipment and a supersaturated dissolved oxygen method. The equipment comprises: a water inlet pipe, wherein the first end of the water inlet pipe is provided with a water inlet, and the water inlet pipe is provided with a submersible pump and / or a self-priming pump so as to suck polluted water into the water inlet pipe; a reactor connectedto the second end of the water inlet pipe so as to form fluid communication with the water inlet pipe, wherein the reactor forms gas communication with an oxygen source through an oxygen conveying pipe, and a gas inlet valve is arranged on the oxygen conveying pipe; a water outlet pipe provided with a water outlet ball valve, wherein the first end of the water outlet pipe is connected to the reactor, and an inverted U-shaped pipe is arranged on the water outlet pipe; and a reflux pipe provided with a pipeline pump, wherein the first end of the reflux pipe is connected to the highest position of the inverted U-shaped pipe so as to form fluid communication with the inverted U-shaped pipe, and the second end of the reflux pipe is connected to the water inlet pipe so as to form fluid communication with the water inlet pipe, such that one part of the water in the water outlet pipe refluxes into the reactor through the water inlet pipe so as to pressurize the reactor. According to the invention, with the equipment and the method, the oxygenation efficiency can be improved so as to improve the dissolved oxygen level.

The invention patent relates to a hydraulically interconnected suspension that can recover vibration energy. Including hydraulic cylinders, connecting pipelines, hydraulic rectifier bridges, accumulators, hydraulic motors, solenoid valves, and electronic control units. By connecting the hydraulic cylinders in the rear suspension hydraulically interconnected suspension in reverse series, that is, the upper chamber of the left hydraulic cylinder is connected to the lower chamber on the right, and the lower chamber on the left is connected to the upper chamber on the right. When the left and right wheels are jumping, the liquid interaction between the connecting pipelines can balance the loads on the wheels on both sides, and the anti-rolling effect can be achieved; at the same time, the flow of oil in the pipeline drives the hydraulic motor to rotate in one direction, and the hydraulic motor drives the generator to generate electricity , the generated electric energy is stored in the battery through the charging circuit, so that the hydraulic interconnected energy-feeding suspension achieves the purpose of recovering vibration energy.

The invention relates to the technical field of natural gas exploitation, in particular to a method for injecting a heat storage material to exploit hydrates in a horizontal well. The heat storage material provides heat, during the migration process of the heat storage material, the linear loss of conventional thermal fluid is reduced, the intercommunication of the heat storage material expands the heating range of a reservoir, continuous heating of reservoir mining is maintained, the decomposition rate of the hydrates is increased, and gas is continuously and efficiently produced. The methodcomprises the following steps that S1, in a production well, the heat storage material and ceramsite are injected together into a formation, and at the same time, in an auxiliary well, the heat storage material is continuously injected into the formation to achieve the effect of perforation; and S2, when the production well begins to produce in a depressurizing mode, negative pressure is generatedinside a wellbore, the heat storage material and the ceramsite originally entering the reservoir migrate and accumulate towards the direction of the wellbore under the action of the negative pressure, during the migration process, the heat storage material is squeezed, when the pressure reaches a certain level, the internal structure of the heat storage material changes, and heat energy is released, so that the temperature of the reservoir increases, and the decomposition of the hydrates is accelerated.

The invention mainly belongs to the field of hydraulic driving power devices, and particularly relates to a movable hydraulic power station. Layout of parts is optimized, application is achieved by combining a light material and a new technology, and weight reduction of a whole machine is achieved comprehensively; in the aspect of a hydraulic system, a high-volumetric-efficiency main pump is selected, hydraulic element layout is optimized, an integral hydraulic integrated control valve is designed, an oil flow allocation function, a hand control valve, an overflow valve, an input connector and an output connector are integrally designed, the working efficiency of the hydraulic system is improved, and the effect that the output range of the flow is widened is achieved through the integrated control valve; in the aspect of a hydraulic heat dissipation system, aiming at the current situation that the continuous working time is long, and the load is large, the heat dissipation capacity of the hydraulic system is calculated and checked, a hydraulic oil radiator, a wind scooper, a fan and other models are newly designed, the structure is optimized, the heat dissipation capacity of the hydraulic system is effectively improved, meanwhile, the capacity and shape of a hydraulic oil tank are optimized, and finally, the effect that the weight of the whole machine is reduced efficiently, and the whole machine is light and portable is achieved.

The invention provides an efficient quick method for treating separated directly-connected vacuum preloaded foundation. The efficient quick method mainly includes: paving knitted cloth or geotextile on a soft foundation to be treated; arranging longitudinal plastic drainers; mounting a vacuum delivering pipe network; arranging water and steam separators; paving a sealing film; mounting a vacuum control room; and vacuumizing. In the efficient quick method, a medium-coarse sand cushion layer in a routine vacuum preloading method is replaced, and a path for delivering vacuum is shortened. Meanwhile, due to the arrangement of the water and steam separators, an air exhausting theory in the conventional vacuum preloading method is changed, curing time is shortened, curing effect is improved, and quickness, efficiency, energy-conservation and environment-friendliness of a construction process are realized.

The invention provides an adjustable pressurization type ventilation device. The adjustable pressurization type ventilation device comprises an air bin, an air inlet is formed in one end of the air bin, and an air outlet is formed in the other end of the air bin; a pressurizing plate is arranged in the air bin in a sealed and sliding mode and divides the air bin into an air inlet area and a pressurizing area, and air inlet holes are formed in the pressurizing plate; a telescopic air inlet pipe is arranged in the air inlet area, one end of the telescopic air inlet pipe is connected with the air inlet of the air bin, and the other end of the telescopic air inlet pipe is connected with the air inlet holes of the pressurizing plate; and a pressurizing plate driving mechanism is connected with the pressurizing plate. According to the adjustable pressurization type ventilation device, the pressurizing plate is arranged in the air bin, the pressurizing plate and the air bin are combined to form the mechanical pressurizing air bin, when the pressurizing plate driving mechanism is used for driving the pressurizing plate to slide in the air bin, large pressure difference can be formed between an air flow in the air bin and air pressure at an air supply point after the air flow is compressed, fresh air in the air bin can be stably conveyed to the air supply point under the action of the pressure difference, waste gas at the air supply point is extruded out of a tunnel along the space in the tunnel, the ventilation effect is good, and energy consumption is low.