37results about How to "Continuous air supply" patented technology

The invention, which belongs to the technical field of the wind tunnel, particularly relates to a method and apparatus for improving an air storage type wind tunnel. The method comprises: low-pressure liquid air or low-pressure liquid nitrogen absorbs an environment heat source by a vaporizer and and is converted into normal-temperature high-pressure gas by an environment heat source; a compressed gas tank is filled with one part of the normal-temperature high-pressure gas and the other part of the normal-temperature high-pressure gas drives an expansion machine to convert high-pressure potential energy into mechanical energy so as to drive an air compressor; the expansion machine discharges exhaust gas for cooling the air compressor; normal-temperature high-pressure gas after boosting by the air compressor is inputted into the air compressor, high-pressure gas generated by compression by the air compressor and the exhaust gas discharged by a cooling outlet of the air compressor are mixed and then mixed gas enters the compressed gas tank; and compressed gas from the compressed gas tank enters a wind tunnel pipe at a high speed through a wind tunnel jet head to form a wind tunnel airflow. According to the invention, the vaporizer, the air amplifier, and the expansion machine are used for the wind tunnel field; the environmental thermal energy is utilized fully; the electric energy consumption is substantially reduced; rapid and continuous large-airflow air supply is realized; the system is simplified; the energy consumption is reduced; the efficiency is high; and the cost is low.

This invention discloses a process for producing carbon black from oven coal gas instead of fuel oil. The process comprises: treating collected oven coal gas with a water-sealing apparatus, adjusting the pressure by a coal gas fan and a pressure adjusting valve, passing through a flow meter, an automatic flow adjusting valve and a check valve, mixing oven coal gas with air at a certain ratio, introducing into a combustion furnace, combusting, sending the heat generated during combustion to a throat to atomize raw oil there, sending atomized raw oil to a reaction furnace, pyrolyzing to obtain carbon black, cooling, collecting, transporting, granulating, and packaging. The method can effectively prolong the service life of combustion furnace, and has such advantages as high process stability and high carbon black quality.

The invention discloses a rotary valve structure of regenerative thermal oxidizer (RTO) equipment. The rotary valve structure comprises a valve body of a single-layer cylindrical structure and a center shaft longitudinally arranged in the center of the valve body. The top and the bottom of the valve body are opened. An opening in the top of the valve body is partially sealed through a fan-shaped top plate connected with the center shaft. An opening in the bottom of the valve body is partially sealed through a fan-shaped bottom plate connected with the center shaft. A plurality of vent holes are formed in the side surface of the valve body. Since the center shaft connected with the top plate and the bottom plate is arranged, the rotary valve structure is simplified, and manufacturing and mounting are facilitated; all cavities are reasonably arranged and mutually partitioned, so that air outputs of all the cavities are uniform; and through a purging device additionally arranged, treated waste gas can be blown out of the RTO equipment, and the purification effect and stable operation of the equipment are guaranteed.

The invention provides an automatic system for preparing lithium hydroxide with low preparation cost. The automatic system for preparing lithium hydroxide, provided by the invention, comprises a preparation subsystem and is characterized by further comprising a protective air supply subsystem, a filtering device, a mother liquor storage device, an absorption tower, an air drying device and a feeding device, wherein the protective air supply subsystem is used for removing carbon dioxide from air so as to supply air free from carbon dioxide as protection air to the preparation technology of lithium hydroxide; the filtering device is used for filtering grains from air and comprises at least two filters, a valve component and a valve control unit; the remained lithium hydroxide mother liquor after crystal is separated from a concentrating crystallizing device is stored in the mother liquor storage device; the absorption tower introduces the lithium hydroxide mother liquor as an absorption agent for absorbing carbon dioxide in the filtered air so as to obtain the air free from carbon dioxide; the air drying device is used for drying the air free from carbon dioxide and obtaining the protective air; the feeding device is communicated with the air drying device and is used for feeding the protective air to the preparation subsystem.

The invention discloses a system used for producing biogas from renewable energy by multi-energy coupling. The system comprises a solar energy heat power generation system, a biomass raw material pre-treatment system, a biogas fermentation system, a waste-heat utilization system and a fuel auto-control injection system; a heat exchanger (3) of the solar energy heat power generation system is connected to a compressor (1) and a gas turbine (2) respectively; a mixer (12) of the biomass raw material pre-treatment system is connected to an electric generator (7); exhaust generated in the waste-heat utilization system is exhausted via a solar energy collector (4), the gas turbine (2), the heat exchanger (3) and a silencer (6); a fire barrier (16) of the fuel auto-control injection system is connected to a combustion chamber (5); and a temperature indicator is connected to a pipeline arranged between the solar energy collector (4) and the combustion chamber (5).

The application discloses a high-efficiency molecular sieve oxygen generator, comprising: an air inlet, an adsorption tower group connected to the air inlet, a purity analyzer, a gas recovery system, the purity analyzer and the gas recovery system The system is connected in parallel, one end of the parallel connection between the purity analyzer and the gas recovery system is connected to the gas output pipeline of the adsorption tower group, and the other end is connected to the oxygen outlet; a gas outlet is also installed on the pipeline of the oxygen outlet Control valve. The high-efficiency molecular sieve oxygen concentrator provided by the present invention can release oxygen continuously, efficiently and quickly, and can detect the purity of oxygen in time, recover the oxygen with insufficient purity in time, return it to the tower for repurification, and ensure that the purity of the generated oxygen reaches the standard. And it can supply gas continuously, saving resources and further improving production efficiency.

The invention discloses a rotary cutoff device for an evaporating pipe. The rotary cutoff device comprises a motor, a rotary guide body, a blade, a pneumatic radial pushing mechanism, a cutting supporting mechanism and a rotary air supply mechanism. The rotary guide body is of an integral structure composed of a pipe body and an annular disc, and a pipe hole is formed in the axial direction of the center. The rotary guide body can be driven by the motor to rotate. The pneumatic radial pushing mechanism, the cutting supporting mechanism and the blade are arranged on the rotary guide body and can rotate along with the rotary guide body. The pneumatic radial pushing mechanism is used for driving the blade to move on the annular disc in the radial direction. The rotary air supply mechanism is used for providing compressed air for work of an air cylinder when the air cylinder rotates along with the rotary guide body. When the rotary cutoff device works, the blade rotates around the axis of the evaporating pipe, the evaporating pipe is cut off, and therefore when the evaporating pipe is cut off, a cutting opening is flat. The blade is pushed to the center of the evaporating pipe and faces the inner side of the evaporating pipe even though burrs are generated, and connecting and mounting cannot be influenced after and before evaporation.

The invention discloses a wastewater aeration device for water supply and drainage, and belongs to the technical field of wastewater treatment. The device comprises a supporting frame, a water storagetank, a treatment barrel and an aeration barrel, a moving rod is arranged on a central shaft in the aeration barrel, a gas dispersing plate is arranged at the lower end of the moving rod, a ventilation cavity is formed in the moving rod, the gas dispersing plate comprises upper and lower layer plates with a uniform dimension and fixing rings which surround the circumferences of the upper and lower layer plates, a plurality of sector gas charging cavities which surround the moving rod are formed in the part between the upper and lower layer plates by separation plates, the ventilation cavity is communicated with each gas charging cavity, and a row of air outlet holes with gradually increasing hole diameters which are distributed from the side where the moving rod is located to the side where the fixing rings are located are formed in the part, corresponding to the upper and lower layer plates, of each gas charging cavity; the top of the moving is connected with a piston rod of a hydraulic cylinder, the upper port of the aeration barrel is sealed, and the circumference of the gas dispersing plate adhere to the inner wall of the aeration barrel. According to the device, gas supplyingis more uniform, the thoroughly mixing of gas and water can be promoted from multiple aspects to improve aeration effect, and water quality can be improved after treatment is conducted.

The invention discloses a butt-jointing positioning and locking mechanism for a large device. The butt-jointing positioning and locking mechanism comprises a base, and further comprises a main bracket, a top column bracket and a top column which are arranged on the base; the top column can slide in a cavity of the top column bracket, and an elastic part is arranged between the end surface of the top column and the end surface of the top column bracket; and a V-shaped clamping plate and a lock hook are arranged on the base, the V-shaped clamping plate and the tail end of the lock hook are connected with a second column pin which is arranged on the base and rotate around the second column pin, and a side plate of the lock hook is connected with an output end of an air cylinder through a first column pin. According to the butt-jointing positioning and locking mechanism, the stroke of a telescopic rod of the air cylinder is controlled relying on the position sensing of the air cylinder, and the rotation movement of the lock hook is achieved; and a closed circuit is formed by the lock hook and a V-shaped clamping lock, mechanical limiting is achieved without other limiting sensors, thecontrol system is simple, and positioning is accurate and reliable.

The invention discloses an efficient molecular-sieve oxygen generator. The efficient molecular-sieve oxygen generator is characterized by comprising a PLC (Programmable Logic Controller), a purity analyzer and a gas recycling system connected with the purity analyzer, wherein the purity analyzer and the gas recycling system are further connected to a gas outlet control valve and an oxygen gas outlet; the purity analyzer is electrically connected with the PLC and is used for transmitting oxygen gas purity information to the PLC; the PLC is electrically connected with the gas recycling system and the gas outlet control valve, and is used controlling a working state of the gas recycling system and the switching-on / off of the gas outlet control valve. According to the efficient molecular-sieve oxygen generator disclosed by the invention, oxygen gas can be continuously released; the efficient molecular-sieve oxygen generator is efficient and rapid and can be used for detecting the purity of the generated oxygen gas in time; the oxygen gas with insufficient purity can be recycled in time and is returned back to a tower to be repeatedly purified, so that the purity of the produced oxygen gas reaches standards; gas can be continuously supplied, resources are saved and the production efficiency is further improved.

The invention relates to a floating liquefied natural gas regasification system for a low-temperature water area. The floating liquefied natural gas regasification system for the low-temperature water area is characterized in that the floating liquefied natural gas regasification system comprises a liquefied natural gas (LNG) / natural gas (NG) conversion structure, an intermediate medium loop structure, a heating medium backflow structure and a seawater circulating structure. An intermediate medium heater obtains heat from seawater or a heat exchanger (HM), and the seawater is used as a heat source most time when the inlet temperature of the seawater is higher than 8 DEG C; when the temperature of the seawater is lower than 8 DEG C, the HM replaces the seawater to serve as the heat source through the intermediate medium heater. According to the floating liquefied natural gas regasification system for the low-temperature water area, heating media are introduced under the low-temperature seawater working condition, the quantity and form of the heating media can be changed according to different sea areas, in this way, the system can be used in sea areas under various seawater working conditions, is suitable for all sea areas in China and similar sea areas in foreign countries, is flexibly applied to various seawater working conditions, and not only is applicable to the low-temperature water area, but also can prevent the intermediate medium heater from being corroded. By the adoption of the floating liquefied natural gas regasification system for the low-temperature water area, stable production in the water areas in the north of China can be achieved, and continuous safe gas supply is achieved.

The invention relates to a porous gas producing agent molding pressing product and a preparation process thereof. The porous gas producing agent molding pressing product is a cylindrical body, and isa cylindrical body provided with a plurality of holes at inside in the height direction; the ratio range of the height of the cylindrical body to the maximum dimension of the cross section is 0.3 to 1.8; the ratio range of the total area of the porous cross section of the cylindrical body to the total area of the cross section of the cylindrical body is 0.03 to 0.15. In the combustion process of the pressed porous gas producing agent, the equal surface combustion or the increased surface combustion can be realized, or multi-section different-condition combustion can be realized; the goal of regulating the P-t performance of the gas generator is realized, so that the material cost of the gas generator and the mass of the generator can be reduced. The porous gas producing agent molding pressing product is mainly used for automobile airbag gas generator. The pressing shaping process is used; the goal of preparing the small-size porous gas producing agents in a pressing shaping mode is achieved for the first time, so that the preparation process is simple and efficient; the operation and control are easy.

The invention relates to ecological environment-friendly ornamental intelligent furniture. The ecological environment-friendly ornamental intelligent furniture comprises a cylindrical box body, wherein an opening is formed in the top surface of the box body, a cylindrical fish tank is fixedly mounted on the top surface of the box body in a sealed mode, a horizontal circular plate, a first circularring and a second circular ring are arranged in the center of the top surface of the box body, The side surface of the circular plate is connected with the inner side surface of the first circular ring through a sealing bearing, the outer side surface of the second circular ring is connected with the inner side surface of the box body through a sealing bearing, vertical first cylinders are fixedly mounted in the centers of the bottom surface of the circular plate and the bottom surface in the box body, and second cylinders are fixedly mounted in the centers of the opposite end surfaces of thetwo first cylinders. A first vertical plate and a second vertical plate sequentially rotate through continuous rotation of a motor, air enters the fish tank, oxygen supply in the fish tank is guaranteed, and in the moving process of the first vertical plate and the second vertical plate, a first annular rockery and a second annular rockery can be driven to move along with the first vertical plateand the second vertical plate, so that the rockeries are staggered; and while the ornamental enjoyment is increased, oxygen can be continuously supplied to water in the fish tank, and the water in the fish tank is prevented from becoming smelly.

The invention discloses a molecular sieve oxygen generation mechanism of a portable oxygen generator. The molecular sieve oxygen generation mechanism comprises an oxygen storage tank (1), a right molecular sieve tank (24), a left molecular sieve tank (25), an electromagnetic valve seat (5) and a lower gas path cover (34), the interior of the oxygen storage tank (1) is divided into a left cavity, amiddle cavity and a right cavity, the left molecular sieve tank (25) is placed in the left cavity, and the right molecular sieve tank (24) is placed in the right cavity; a plurality of air paths arearranged on the electromagnetic valve seat (5) and the lower air path cover (34) to perform pressurized adsorption and decompressed desorption blow-off on the right molecular sieve tank (24) and the left molecular sieve tank (25), so that the product quality of the molecular sieve oxygen generation mechanism of the portable oxygen generator is improved.

The invention provides a gas supply system for preparing pyrolytic boron nitride and a gas supply method of the gas supply system for preparing the pyrolytic boron nitride. The gas supply system comprises a furnace body, a plurality of boron trichloride gas supply bottles, a plurality of ammonia gas supply bottles and a shielding gas supply bottle group, wherein a first gas inlet and a second gasinlet are arranged on the furnace body, the plurality of boron trichloride gas supply bottles communicate with the first gas inlet in parallel, the plurality of ammonia gas supply bottles communicatewith the second gas inlet in parallel, and the shielding gas supply bottle group communicates with a first main pipeline, a first branch pipeline, a second main pipeline and a second branch pipeline.The plurality of boron trichloride gas supply bottles and the plurality of ammonia gas supply bottles are arranged in parallel, so that stable, safe and continuous gas supply is ensured, and before and after chemical vapor deposition, the pipelines can be purged by using the shielding gas supply bottle group, so that the influence of gas with an oxidizing function on chemical vapor deposition reaction and corrosion of gas residues to the pipeline are prevented, and the quality of a pyrolytic boron nitride product is improved.

The invention belongs to the technical field of agricultural equipment and particularly relates to disease and insect pest control equipment for agricultural and forest crops. The equipment comprisesa vehicle body, a water passage pipe and a sprinkling assembly. The equipment further comprises a driving unit, a swinging unit, an air cylinder I, a fixing block I, a fixing block II, a water tank and a hose. The driving unit is used for moving the vehicle body; and the swinging unit is used for enabling the sprinkling assembly to sprinkle uniformly. The driving unit and the swinging unit are matched with each other, so that on one hand, an insecticide solution is sprinkled to the agricultural and forest crops according to actual conditions, the sprinkling is uniform, the damage to the agricultural and forest crops caused by plant diseases and insect pests is avoided, and thus, the effect of disease and insect pest control on agriculture and forestry is improved; and on the other hand, apower source of the equipment is utilized, so that the utilization ratio of resources is increased, meanwhile, external power equipment is reduced, and thus, the manufacturing cost of the equipment isreduced.

The invention belongs to the technical field of agricultural equipment, and is specifically a kind of equipment for controlling diseases and insect pests of agricultural and forestry crops, including a car body, a water pipe and a spraying assembly; block, tank and hose. The driving unit is used for the movement of the vehicle body; the swing unit is used for uniform spraying of the spraying assembly. Through the mutual cooperation between the driving unit and the swing unit, on the one hand, the agricultural and forestry crops are sprayed with the pesticide solution according to the actual situation, and the spraying is uniform, so as to avoid the damage of the agricultural and forestry crops by the pests and diseases, thereby improving the effect of the prevention and control of the agricultural and forestry pests and diseases; On the one hand, the power source of the agricultural and forestry pest control equipment is utilized, thereby improving the utilization rate of resources, and at the same time reducing the external power equipment, thereby reducing the manufacturing cost of the agricultural and forestry pest control equipment.

Disclosed is gas-intensive complete equipment for baking tobaccos by biomass charcoal. The gas-intensive complete equipment is provided with a plurality of carbonization furnaces special for biomass flue-cured tobaccos. A discharge outlet of a drying machine is connected with feed inlets of the carbonization furnaces. A honeycomb burner is arranged on each carbonization furnace, smoke generated bymaterial carbonization of the carbonization furnaces enters primary and secondary oil-gas separators through smoke pipelines, gas outlets of the oil-gas separators are connected with a tubular condenser, the output end of the tubular condenser is connected with a gas storage tank, a part of fuel gas in the gas storage tank is delivered to a combustor, and flames generated after combustion enter ahot blast heater special for an intensive baking room to bake tobacco leaves; another part of the fuel gas is delivered to a direct-fired hot blast heater to provide a heat source for heating materials to the drying machine. The gas-intensive complete equipment has the advantages that the combustion energy density of the carbonized fuel gas is remarkably increased through processes such as special purification, and continuous and stable hot air is guaranteed in the tobacco baking process; the production cost is remarkably reduced, and benefits are remarkably improved.

The invention, which belongs to the technical field of the wind tunnel, particularly relates to a method and apparatus for improving an air storage type wind tunnel. The method comprises: low-pressure liquid air or low-pressure liquid nitrogen absorbs an environment heat source by a vaporizer and and is converted into normal-temperature high-pressure gas by an environment heat source; a compressed gas tank is filled with one part of the normal-temperature high-pressure gas and the other part of the normal-temperature high-pressure gas drives an expansion machine to convert high-pressure potential energy into mechanical energy so as to drive an air compressor; the expansion machine discharges exhaust gas for cooling the air compressor; normal-temperature high-pressure gas after boosting by the air compressor is inputted into the air compressor, high-pressure gas generated by compression by the air compressor and the exhaust gas discharged by a cooling outlet of the air compressor are mixed and then mixed gas enters the compressed gas tank; and compressed gas from the compressed gas tank enters a wind tunnel pipe at a high speed through a wind tunnel jet head to form a wind tunnel airflow. According to the invention, the vaporizer, the air amplifier, and the expansion machine are used for the wind tunnel field; the environmental thermal energy is utilized fully; the electric energy consumption is substantially reduced; rapid and continuous large-airflow air supply is realized; the system is simplified; the energy consumption is reduced; the efficiency is high; and the cost is low.

The invention discloses a wastewater aeration device for water supply and drainage, and belongs to the technical field of wastewater treatment. The device comprises a supporting frame, a water storagetank, a treatment barrel and an aeration barrel, a moving rod is arranged on a central shaft in the aeration barrel, a gas dispersing plate is arranged at the lower end of the moving rod, a ventilation cavity is formed in the moving rod, the gas dispersing plate comprises upper and lower layer plates with a uniform dimension and fixing rings which surround the circumferences of the upper and lower layer plates, a plurality of sector gas charging cavities which surround the moving rod are formed in the part between the upper and lower layer plates by separation plates, the ventilation cavity is communicated with each gas charging cavity, and a row of air outlet holes with gradually increasing hole diameters which are distributed from the side where the moving rod is located to the side where the fixing rings are located are formed in the part, corresponding to the upper and lower layer plates, of each gas charging cavity; the top of the moving is connected with a piston rod of a hydraulic cylinder, the upper port of the aeration barrel is sealed, and the circumference of the gas dispersing plate adhere to the inner wall of the aeration barrel. According to the device, gas supplyingis more uniform, the thoroughly mixing of gas and water can be promoted from multiple aspects to improve aeration effect, and water quality can be improved after treatment is conducted.

The invention provides a chemical vapor deposition system, a gas supply device and a gas supply method, the gas supply device includes a terminal main pipe, a first gas supply pipeline and at least one spare gas supply pipeline; the first gas supply pipeline includes a mixed gas supply Branch line, process gas supply branch line, gas mixing container and sixth electromagnetic pneumatic valve, process gas supply branch line includes process gas storage container, high-purity filter, fourth electromagnetic pneumatic valve, fifth electromagnetic pneumatic valve, third pressure transmitter , a first mass flow meter, a first purge gas pipeline and a second purge gas pipeline; the spare gas supply pipeline is the same as the first gas supply pipeline. The gas supply device of the chemical vapor deposition system of the present invention can realize on-line switching and stable, safe and continuous gas supply, and ensure the stability of process gas supply during the chemical vapor deposition process.

An ecological environment-friendly intelligent furniture for ornamental use, comprising a cylindrical box with an opening on the top surface of the box, a cylindrical fish tank fixed and sealed on the top surface of the box, a horizontal circular plate, a first ring and a second ring arranged in the center of the top surface of the box. Two rings, the side of the disc is connected to the inner side of the first ring through a sealed bearing, the outer side of the second ring is connected to the inner side of the box through a sealed bearing, and the bottom of the disc and the center of the inner bottom of the box are fixed and installed vertically. A cylinder, the center of the opposite end faces of the two first cylinders are fixedly installed with the second cylinder. The invention makes the first vertical plate and the second vertical plate rotate sequentially through the continuous rotation of the motor, and the air enters the fish tank to ensure the oxygen supply in the fish tank. During the moving process of the first vertical plate and the second vertical plate, it can Drive the first ring-shaped rockery and the second ring-shaped rockery to follow and move together to make the rockery staggered, which can continuously supply oxygen to the water in the fish tank while increasing the fun of viewing, and prevent the water in the fish tank from becoming stinky.

The present invention relates to a porous gas-generating agent molded product and its preparation process. The porous gas-generating agent molded product is a columnar body with a plurality of holes arranged inside along the height direction. The ratio of the largest dimension ranges from 0.3 to 1.8; and the ratio of the total cross-sectional area of ​​the columnar body to the total cross-sectional area of ​​the columnar body ranges from 0.03 to 0.15. The combustion process of the compressed porous gas-generating agent can realize equal-surface combustion or surface-increasing combustion, or multi-stage combustion under different conditions, so as to adjust the P-t performance of the gas generator according to the demand, thereby reducing the material cost of the gas generator and The quality of the generator; the compressed porous gas generating agent is mainly used for automobile airbag gas generators; the present invention adopts the compression molding process, and for the first time realizes the preparation of small porous gas generating agents in the form of compression molding, making the preparation process simple, efficient, and efficient. Easy to operate and control.

The invention discloses a gas cylinder rack capable of automatically switching double cylinders and continuously supplying gas in the field of semiconductor gas supply, the gas cylinder rack comprises a supporting seat and a connecting frame, the connecting frame is located on the outer side of the supporting seat, mounting plates are fixedly mounted at the positions, close to the two sides, of the bottom of the connecting frame, and mounting pins are connected to the interiors of the mounting plates in a penetrating manner; a gas supply bottle is placed at the top of the supporting seat; according to the gas cylinder rack, a gas supply cylinder can be clamped through the arranged clamping mechanism, so that the gas supply cylinder can be conveniently replaced and mounted, tensioning can be performed between the supporting seat and the connecting rack through matched use of the arranged tensioning protection mechanism, the fixed column and the tensioning rod, and the situation that a pipeline connected with the gas cylinder rack is loosened can be prevented; according to the gas cylinder rack pipeline protection device, protection can be carried out above the gas cylinder rack pipeline, the use safety of the gas cylinder rack pipeline is improved, through the arranged switching driving mechanism, the driving seat can be conveniently switched and plugged on the two sides of the three-way valve seat, and therefore automatic switching and continuous gas supply of double cylinders can be achieved.

The invention discloses an uninterrupted air supply device on a circular production line, which comprises a circular frame and a production trolley. The production trolley is movable in a circular direction around the ring frame. The center frame of the ring frame is provided with guide rails. An air supply car is provided on the guide rail. The air supply vehicle can move along the guide rail. The air supply connecting arm is installed on the production trolley. A rotary air supply device is installed on the air supply vehicle. The rotary air supply device can rotate 360 ​​degrees on the horizontal plane. The rotary air supply device is connected with the air supply connecting arm. When the production trolley moves around the ring frame, the production trolley can drag the air supply vehicle along the guide rail through the air supply connecting arm and the rotating air supply device. The invention can continuously supply air to the production trolley through the rotating air supply device.

The invention discloses a piston type air compressor, an air supply system and an automobile. The piston type air compressor comprises a crankshaft, a piston connecting rod assembly and an air cylinder assembly. The piston and connecting rod assembly comprises a first piston and connecting rod set and a second piston and connecting rod set which are arranged in the circumferential direction of thecrankshaft in a spaced mode and each comprise a connecting rod and a piston, wherein one end of the connecting rod is arranged on the crankshaft in a sleeving mode, and the other end of the connecting rod is connected with the piston. The air cylinder assembly comprises a first air cylinder and a second air cylinder which are arranged in the circumferential direction of the crankshaft in a spacedmode. The pistons of the first piston and connecting rod set and the second piston and connecting rod set are located in the first air cylinder and the second air cylinder separately and can reciprocate in the corresponding air cylinders along with rotation of the crankshaft. When the piston of one piston and connecting rod set of the piston and connecting rod assembly is located in an air sucking working stroke, the piston of the other piston and connecting rod set is located in an air exhausting working stroke. The piston type air compressor can continuously supply air, and air exhausting impulse and vibration are reduced.