96results about How to "Extend continuous working time" patented technology

The invention discloses an automatically-movable monitoring buoy and a monitoring method thereof. The buoy comprises a disc-shaped shell, a sealing shell, a control system, a communication navigation system, a driving system, a sensor system and an energy system. The control system is connected with the communication navigation system, the driving system, the sensor system and the energy system respectively. The disc-shaped shell is composed of an upper shell body and a lower shell body. A cavity is formed between the upper shell body and the lower shell body. The outline of the disc-shaped shell is in the shape of a rotative surface, so that radius-thickness ratio is large, flexibility in operation is high, and steering motion with zero turning radius can be realized; due to the large radius-thickness ratio, lift-drag ratio of sliding motion of the buoy is increased, and large horizontal displacement motion in shallow waters can be realized; due to small curvature of the upper surface of the outline of the disc-shaped shell, power generation efficiency of a solar cell panel is effectively improved; continuous working time of the disc-shaped automatically-movable monitoring buoy can be effectively increased.

The invention discloses an environmentally-friendly low-themogenesis rubber composite for a high-capacity tyre body and a high-capacity tyre using the same. The rubber composite for the high-capacity tyre body is prepared by using natural rubber, environmentally-friendly styrene rubber 1500E, white carbon black, natural gas semi-reinforcing furnace black N770, condensed aromatics removed environmentally-friendly aromatic oil and the like as raw materials and matching with reasonable proportional design, which ensures that themogenesis of rubber materials is lower so as to improve the continuous operation time of the tyre body and further ensures that the service life of the tyre is prolonged, greatly reduces health risks caused to processors and users during the production and the use and enables the competence of products to be improved.

The invention relates to a magnetic nozzle of a variable specific impulse magnetic plasma rocket, aiming at solving the problem of speed waste during acceleration of a plasma body in an electric propulsion system and relating to the design technology of the magnetic nozzle of the variable specific impulse magnetic plasma rocket. The magnetic nozzle of the variable specific impulse magnetic plasma rocket is used for changing a circumferential speed of the plasma body to an axial speed and belongs to the magnetic fluid technology field. The magnetic nozzle which is used as the last stage of the variable specific impulse magnetic plasma rocket is arranged at the tail end of a rocket engine and consists of a sprayer nozzle and a superconducting coil, wherein, the sprayer nozzle is arranged at the tail end of a shell body of the rocket engine and is an expanding nozzle, the nozzle expansion ratio which is the ratio between a nozzle exit area and a nozzle throat area is 40:1, the nozzle is made of a heat-resisting and ablation-resisting alloy material to reduce ablation and thrust eccentricity.

The invention discloses equipment for carrying out carbonization on oil shale by utilizing gas as a heat carrier under the state of full circulation, which is suitable for processing the oil shale of 6 to 50mm; the daily processing capacity of the equipment is 300 tons and the oil yield is more than 90 percent. No gas engine is arranged in a carbonization furnace and no gas enters the carbonization furnace; all the heat needed by carbonization can be completely supplied by circulation gas. The oil shale through pre-heating carbonization enters the carbonization furnace from the upper part. A cloth tracery wall and a gas distribution structure the sizes of which are corresponding to that of the grains of the oil shale are arranged in the carbonization furnace. The thermal circulation gas of 700 DEG C is evenly and continuously fed into the middle part of the carbonization furnace. The cold circulation gas enters the carbonization furnace from the lower part to cool the semi-cokes after carbonization to 250 DEG C and the semi-cokes are discharged into a water-sealed semi-coke pool to be cooled to 80 DEG C and discharged outside the furnace by a drawing template. The highest temperature in the carbonization furnace is controlled below 550 DEG C, thus not only ensuring the complete carbonization of the oil shale, but also avoiding the problems like over-heating and caking.

The invention relates to an integrated high-reliability and high-precision long-term monitoring system which comprises the components of two alternate acquiring-and-coding units, two integrated controllers, a switch, two monitoring computers, a plurality of first sensors and a plurality of second sensors. According to the integrated high-reliability and high-precision long-term monitoring system, through improvement and innovation of a traditional data acquisition, coding, transmission and demodulation processing method, based on a serial communication interface and an industrial Ethernet, problems of complicated system equipment structure, low precision and insufficient long-term reliability are settled, and advantages of high reliability, high precision and long-term monitoring are realized. According to the integrated high-reliability and high-precision long-term monitoring system, in an integration aspect, integrated design is performed on key equipment of the system, number of equipment components is reduced and system complexity is reduced; in a transmission real-time performance aspect, data transmission is finished based on a serial bus and the Ethernet, thereby ensuring no performance reduction in actual use caused by transmission delay time; and in a long-term reliability aspect, through utilizing a redundancy design and other reliability design measures on the key equipment, continuous operation time of the product is prolonged.

An axially feeding powder type supersonic flame spraying gun using liquid fuel as energy source is composed of a casing and the serially connected gum tube, convergent divergent nozzle, combustion chamber and tail unit. A main water cooling channel is formed between said casing and the serially connected units. In said tail unit, their is a water cooled powder feeding tube surrounded by 2-12 liquid fuel spraying tubes. Its advantages are high flowing speed of powder, fully smelting of powder, and high quality of coated layer.

The invention relates to a bi-directional flexible lifting platform. The bi-directional flexible lifting platform comprises a base, a lifting mechanism connected to the base, a middle table connectedto the lifting mechanism, telescopic workbenches connected to the middle table and telescopic mechanisms which are connected with the telescopic workbenches and used for driving the telescopic workbenches to expand and contract. The telescopic workbenches comprise first-stage tables slidably connected with the middle table, the first-stage tables are connected with the telescopic mechanisms, and when the telescopic workbenches stretch out, first-stage tables move towards one sides of the first-stage tables relative to the middle table; and when the telescopic workbenches are drawn back, first-stage tables are located below the middle table. A tunnel cleaning vehicle comprises the bi-directional flexible lifting platform. The bi-directional flexible lifting platform is ingenious and reasonable in overall structural design, small in occupied space, wide in operation range, long in continuous operation time, safe, reliable and high in automation degree; and through the bi-directional flexible lifting platform, defects of the cleaning vehicle can be overcome.

An unmanned water quality sampling and detecting system is provided for continuous and repeated detection and sampling in different depths and different areas for a long time, and comprises a drone, acontrol box, a pull wire and a sampling tube, wherein the control box is internally provided with a battery, a circuit control module, a lifting motor, a motor bracket and a reel; a sampling cylinderis particularly designed with uncovered top and conical bottom, and contains a sensor group, a water pressure gauge, a sealing motor and a sealing cover, and the water quality is sampled by controlling the sealing motor to open and close the sealing cover; at the same time, a core chip of a main control unit of the system uses a low-power device, and the main control unit detects the water depthdata of the water pressure gauge and controls the opening / closing of the sensor group, thereby greatly improving continuous working hours. Through the set of devices, the water quality can be on-linemeasured, recorded and automatically sampled several times in succession under different water depth conditions.

The invention discloses movable straw compact forming equipment in the field. The equipment comprises a field walking traction mechanism and a straw pickup and conveying mechanism. The traction mechanism is provided with a traction platform, a power device is arranged on the traction mechanism, the traction platform is provided with a buffer bin, and an outlet of the straw pickup and conveying mechanism is located on the buffer bin. The movable straw compact forming equipment in the field further comprises a compact forming mechanism, a roller type throat shrinkage mechanism and a shaping mechanism. According to the movable straw compact forming equipment in the field, a main pressure oil cylinder is large in acting force and high in compactness degree; the throat shrinkage portion is long in service life, a composite winding mechanism is adopted for winding a rope body and a plastic film, an expensive and complex knot tying device is omitted, and the equipment cost is reduced. In the field walking process after the equipment initially completes straw cutting, the pickup, forming and film coating can be completed for straw, and the efficiency is high.

The invention provides a flue gas denitrification monitoring system which comprises a sampling device, a filter device, a gas chamber, an analysis meter, an isolation device, a heater and a cleaning plant, wherein the isolation device is used for supplying gas; the gas enters the gas chamber via a gas inlet, forms an isolation region on one side of an optical component adjacent to the flue gas, and is discharged out of the gas chamber via a gas outlet; the heater is used for heating the filter device, the gas chamber and a pipeline connecting the filter device and gas chamber; the cleaning plant comprises a main body, and a first channel, a second channel and a third channel which are arranged in the main body and communicated with each other; the first channel is communicated with the filter device, the second channel is communicated with the gas chamber, and the third channel is communicated with a gas source; the first channel is provided with an expansion region; the included angle between the first channel and the second channel is an obtuse angle or right angle; and the included angle between the second channel and third channel is an acute angle or right angle. The invention has the advantages of high detection speed, high precision, long continuous working time and the like.

The invention discloses a piezoelectric electromagnetic composite wave floating energy device with vortex-induced bluff body vibration, and relates to the technical field of wave power generation. Thedevice comprises a wave energy collection structure and a vortex-induced vibration power generation structure. The wave energy collection structure is used for converting wave energy into gas oscillatory waves and comprises a gas chamber, a connecting sleeve and a cylindrical ventilation pipeline which are sequentially connected from bottom to top, wherein the cylindrical ventilation pipeline isused for transmitting the gas oscillatory waves to the vortex-induced vibration piezoelectric power generation structure; the vortex-induced vibration piezoelectric power generation structure is located in the cylindrical ventilation pipeline and comprises a cantilever beam supporting frame, a cantilever beam fixing base, a cantilever beam and a vortex-induced bluff body power generation structure. By modification of the internal structure of the vortex-induced bluff body, an electromagnetic vibration power generation structure is designed in the vortex-induced bluff body to collect vibrationenergy of the bluff body in vortex-induced vibration to generate electric energy. The device has the advantages of being stable in power generation efficiency, capable of supplying power for a long time and high in energy conversion efficiency.

The invention relates to a submersible type mixing system based on a water turbine. The submersible type mixing system based on the water turbine comprises a water turbine, a stirring impeller, a pedestal guide rail frame, a water suction pipe, a water pump and a water outlet flexible pipe, wherein the water suction pipe, the water pump and the water outlet flexible pipe is used for supplying water to the water turbine as a source of power and the water supply flow of the water pump is controlled by a regulating valve; the water turbine is installed on the pedestal guide frame and placed under the water; the stirring impeller is connected with a water turbine and is driven by a water turbine; the stirring impeller rotates to produce a thrust of water which pushes the flow of water. The working process of the submersible type mixing system is that the water pump pumps water from the pond to boost the pressure, the flow is controlled by the regulating valve, and enters a micro water turbine through a water inlet flexible pipe. The impeller is driven by the rotation of the water turbine, the installation position and direction of the hydraulic turbine can be controlled by the lifting and adjusting mechanism. The submersible type mixing system adopts a micro water turbine instead of a conventional submersible motor to drive the stirring impeller, thus submersible type mixing system can be adopted to various abominable working conditions, increase the continuous working time and service life of the stirrer are increased and the maintenance cost is reduced.

The invention relates to a sewage circulating device of a washing and cleaning vehicle. The sewage circulating device of a washing and cleaning vehicle includes a clean water tank, a trash can, a first-stage solid-liquid separation mechanism and a second-stage solid-liquid separation mechanism. The clean water tank, the trash can and the filter can are detachably mounted on the vehicle chassis ofthe washing and cleaning vehicle, and a garbage bin is separated into a dirt suction bin and a treatment bin by a first partition plate, a first-stage solid-liquid separating mechanism is detachably installed on the inside of a rear door provided at the rear end of the garbage can; a primary solid-liquid separation mechanism comprises the upper filter screen and a lower filter screen, the upper filter screen, a lower filter screen and an inner side wall of a rear door are enclosed to form a filter screen bin, a mesh filter bin is communicated with that dirt suction bin through the upper mesh filter, a secondary solid-liquid separation mechanism can be detachably installed in the treatment chamber, a secondary solid-liquid separation mechanism is provided with a circuitous waterway structure, which is communicated with a filter screen cabin through a lower filter screen, and communicated with a lower part of a filter box through an outlet pipe, wherein a plurality of filter elements aredetachably installed in the filter box, suspended on the upper part of the filter box respectively, the plurality of filter elements are communicated with a clean water tank, and the clean water tankis communicated with a working nozzle of a washing and sweeping vehicle.

The invention, which relates to the battery field, discloses a hybrid power supply system and method with a fuel cell and a lithium battery. The system comprises a fuel cell controller for a fuel cell and for controlling operation of the fuel cell, a system controller for controlling the overall operation of the system, a battery management system for battery management, a lithium battery and a direct-current chopper. The system controller is in signal connection with the fuel cell controller, the battery management system, and the lithium battery; the fuel cell controller is in signal connection with the fuel cell; the battery management system is signal connection with the direct-current chopper and the lithium battery; and the lithium battery is in signal connection with the output terminal of the direct-current chopper. The hybrid power supply system has advantages of high power supply efficiency, high emergency capacity, and high cruising power and the like.

The invention relates to a vertical induction heating continuous carbonization furnace which comprises loading boats and dredging boats that are overlaid vertically, as well as a hearth that consists of a cylinder heating unit and cylindrical sleeves concentrically arranged above and below the heating unit respectively. Materials are put into the loading boats and the dredge boats. A certain quantity of loading boats are positioned between every two dredging boats. The number of the loading boats arranged at intervals is proportional to a dredging time interval. Concave location grooves of inner chambers of the location sleeves are in clearance fit with convex dredging teeth on the outer sides of the dredging boats. When the dredging boats move relative to the upper and lower location sleeves, dust and barriers in a working channel are brought out of the working channel by the dredging boats, so that the effect of dredging the working channel is exerted, the technological requirement of dredging the working channel automatically at a fixed time is met, the blocking of the working channel caused by volatile matters in the furnace is eliminated, and the continuous working time and the service life of the carbonization furnace are prolonged.

The invention discloses an anti-loosening method for a valve deck of a drilling pump. Depending on an adjustable anti-loosening device, the anti-loosening method comprises the steps that first, a retaining disk is mounted on the valve deck; second, the adjustable anti-loosening device is assembled; third, a push rod is adjusted to tightly press the retaining disk; fourth, a locking steel wire is led out from rectangular holes from an ejection screw to the two sides of the rear portion of a swing pressing block, so that the ejection screw is subjected to anti-loosening fixation. According to the method, anti-loosening is conduced on the valve deck of a hydraulic cylinder, due to the fact that a mechanical anti-loosening method is adopted, a valve deck thread can be effectively prevented from loosening under the condition that the drilling pump operates, the phenomenon that a valve plug sealing ring leaks due to the looseness of the valve deck is effectively avoided, and the operating reliability of the drilling pump is improved.

The invention discloses a flying walnut picking device. The device comprises an aircraft, a picking module, a fruit collecting module, an energy supply module and a control module, wherein a picking head in the picking module consists of a control motor, a position sensor, a left clamping knife, a right clamping knife, an anti-collision sponge, a blade and a double-head reverse screw rod; a stepping motor, a picking control system, a rechargeable lithium battery pack and a bevel gear pair are arranged in the aircraft; the fruit collecting module comprises a net bag and a weight sensor; the energy supply module comprises a solar panel and a rechargeable lithium battery pack; the control module comprises a picking control system and a main controller. When the device works, the aircraft drives the picking head to fly to the vicinity of the trunk of a walnut tree, a digital camera of the aircraft carries out image acquisition, and image processing software is used for identifying and positioning a picking target; according to the picking position and distance information which are fed back, the posture of the picking head is adjusted, and fruit picking, clamping knife resetting and fruit collection and conveying are completed in sequence.

The invention provides a variable-volume garbage can of a sweeping car. The garbage can is divided into three areas including a clear water tank area, a normal-pressure sewage tank area and a negative-pressure sewage tank area, wherein sewage in the negative-pressure sewage tank area is pumped into the normal-pressure sewage tank area by a sewage pump, the interconversion of the clear water volume and the sewage volume between the clear water tank area and the normal-pressure sewage tank area can be realized by virtue of soft variable-volume walls, garbage and sewage in the normal-pressure sewage tank area and the negative-pressure sewage tank area can be simultaneously poured by discharge doors, and simultaneously, the normal-pressure sewage tank area and the negative-pressure sewage tank area are sealed. The volume interconversion between the clear water tank area and the sewage tank area can be realized by virtue of the soft variable-volume walls, so that the utilization rate of the volume of the garbage can is increased, and the uninterrupted working time of the sweeping car is greatly extended.

The utility model relates to a blockage-free biomass particle fuel molding machine, which belongs to the technical field of biomass particle pressing machinery. It consists of the frame, the support shaft installed on the frame, the ring die installed on the support shaft, the center pressure wheel set in the ring die, the feed trough set at the inlet of the ring die, and the connection set in the feed trough. It is composed of the feeding screw of the feeding motor, the pulley mechanism that drives the ring die to rotate, and the main motor. It is characterized in that the support shaft is a hollow shaft, and the end of the hollow shaft that extends into the ring die is provided with an orifice. , the other end of the hollow shaft is connected with an induced draft fan. The advantage is that the working temperature in the ring die is effectively reduced, the phenomenon of feed blockage and high temperature damage to the pressure wheel assembly is avoided, and the continuous working time and production efficiency of the machine are improved.

The invention discloses a drawing die. The drawing die comprises a concave die socket and a concave die arranged in the concave die socket, wherein a cooling channel is formed in the concave die socket. According to the drawing die, the cooling channel is additionally formed in the concave die socket so that the concave die socket can be subjected to forced cooling; besides, a water cooling machine is arranged to lower the temperature of cooling water, so that the cooling effect is further enhanced; by the adoption of the concave die socket of the structure, the temperature of the concave die socket only ranges from 20 DEG C to 25 DEG C when the air temperature is 35 DEG C, so that the temperature of the concave die is reduced substantially, the deposition phenomenon of built-up edges is greatly reduced, the frequency of machine halts for die repairing is lowered, the continuous operation time is prolonged, the production efficiency is improved, and output is increased.

The invention discloses a vehicle-mounted hole-type electric fertilizing machine. The vehicle-mounted hole-type electric fertilizing machine comprises a handle, a control button, a vehicle frame, driving wheels, universal driven wheels, a storage battery, a drill bit, a drill bit displacing mechanism, a driving motor and the like, wherein the drill bit displacing mechanism is arranged in the middle of the vehicle frame; and the lower end of the drill bit displacing mechanism is connected with the root part of the drill bit through a drill bit driving motor and a drill bit driving motor reducer. The vehicle-mounted hole-type electric fertilizing machine applies fertilizer by drilling a hole and using high-density bar-shaped fertilizer; and compared with ditching fertilizing machines, the vehicle-mounted hole-type electric fertilizing machine has the advantages that the hole-drilling and soil-breaking volume is small, the required power and energy consumption are low, the size of the whole vehicle-mounted hole-type electric fertilizing machine is small, and the weight of the whole vehicle-mounted hole-type electric fertilizing machine is light, so that the vehicle-mounted hole-type electric fertilizing machine can be applied to orchards, tea gardens and mulberry fields in mountainous areas and hilly areas that the ordinary ditching machines cannot enter, as well as other environments.

The invention relates to the technical field of air purification and particularly relates to an air processing unit. By the aid of the unit, the service life of a chemical filter is prolonged, the continuous working time of the unit is improved, and the temperature of a production workshop can be controlled. The unit comprises a unit casing provided with an air inlet and an air outlet, a blower, at least one dry surface cooler and at least one chemical filter, wherein the blower, at least one dry surface cooler and at least one chemical filter are arranged in the unit casing. The blower, the dry surface cooler and the chemical filter are arranged in the same unit casing, the unit is provided with a blower, the chemical filter can uses a thick absorbing agent layer, the service life of the chemical filter is prolonged, the continuous working time of the unit is improved, and the temperature of the production workshop can be controlled.

The invention relates to a slide bearing joint in a well with an adjustable wellhead, belonging to the field of oil and gas drilling equipment. The slide bearing joint in a well with an adjustable wellhead mainly comprises an upper rotating shaft, a shell, an upper sealing ring, a slide sleeve, a lower sealing ring, a thrust sleeve, a spring, a lower rotating shaft, a self-lubricating layer, an upper spring dowel, a lower spring dowel, a slide bearing inner ring, a slide bearing outer ring, a location baffle and a locking bolt. A fluid guide hole is arranged on the lower part of the upper rotating shaft, and the fluid guide hole guides a drilling fluid which flows through the upper rotating shaft in a gap between the upper rotating shaft and the sleeve; the slide sleeve is a step-shaped sleeve, an upper sealing groove and a lower sealing groove are arranged in the inner hole of the slide sleeve, and a gap is formed between the inner diameter of the slide sleeve and the outer diameter of the upper rotating shaft; and the upper spring dowel is used for locating the slide bearing outer ring before adjusting the bearing, and the lower spring dowel is used for locating the slide bearing outer ring after adjusting the bearing. The slide bearing joint in a well with an adjustable wellhead disclosed by the invention reduces the time used for adjusting the bearing joint or replacing the bearing joint, increases the continuous working time of the bearing in the well, and increases the working efficiency.

The invention relates to a preparation method for a casting nozzle material and discloses preparation for a casting nozzle material resistant to aluminum water corrosion and having nonstick aluminum characteristics. During the preparation for the casting nozzle material resistant to aluminum water corrosion and having the nonstick aluminum characteristics, ceramic fibers serve as main raw materials of the casting nozzle material, and a filler, an organic adhesive, barium salt and an inorganic binding agent are added; the ceramic fibers, the filler, the barium salt, the organic adhesive and the inorganic binding agent are mixed in a certain proportion and put into a stirrer, a solvent is added to perform stirring, and a uniformly-mixed water soluble dispersant is prepared; redundant water is discharged from a multi-directional vacuum self-suction type press, and compression molding is performed; a compression-molded blank is dried and then sintered; the sintered casting nozzle material is put into a hexagonal boron nitride solution, soaked, taken out, dried and then prepared into an aluminum-free casting nozzle material resistant to aluminum water corrosion. By virtue of the preparation method, the casting nozzle material has the characteristic of aluminum water corrosion resistance from the surface to the interior.

The invention provides a cooling system of an airplane air conditioning generator set, heat dissipation performance of an airplane air conditioning bus is improved, and continuous working time of the airplane air conditioning bus is prolonged. The cooling system of the airplane air conditioning generator set comprises a water tank, a water pump, a spray device and a control switch, the water tank is connected with an evaporator of a refrigerating system and collects condensate water of the evaporator, the water pump is connected with the water tank and pumps the collected condensate water in the water tank to the spray device, the spray device is positioned above a generator set radiator and sprays the condensate water conveyed by the water pump to the generator set radiator, and the control switch is connected with the water pump and controls the water pump to work.

The invention provides an overall heat management system for an electric tractor and a control method of the system. The system comprises a power battery heat management system and a double-motor heatmanagement system. Heat exchange is achieved between a power battery and the double-motor heat management system through a heat exchanger. The control method of the overall heat management system forthe electric tractor comprises a power battery and double-motor heat management control method during operation of the tractor and a power battery heat management control method during charging of the tractor, wherein the power battery temperature grade and the double-motor critical working temperature as well as real-time temperature T of the power battery and real-time temperature Tmain' and Tauxilairy' of two motors measured by a temperature sensor are set as identification parameters, and a tractor state is combined to adjust a tractor heat management system mode. According to the systemand the method, the power battery, a main motor and an auxiliary motor are ensured to work at a proper temperature, so that the energy consumption of the battery is effectively reduced, and the continuous operation time of the tractor is prolonged.

The invention discloses a full-automatic watch full-lamination all-in-one machine. The all-in-one machine comprises a base. The top end of the base is provided with a cabinet, and the base and the cabinet are fixedly connected through a frame. The upper surface of the base is fixedly provided with a sliding rail. The all-in-one machine is clever in design, excellent in structure, and low in cost,and is simple and practical. The all-in-one machine is provided with a buffer device. Through the buffer device, pressing strength and speed of an upper laminating plate are buffered and decelerated,overall service life of the upper laminating plate and a lower laminating plate is prolonged, and quality of a laminating piece is guaranteed. The all-in-one machine solves a problem that when a pushing impulsive force of the upper laminating plate is excessive, the upper laminating plate and the lower laminating plate of a laminating piece are easily damaged, and cost waste is reduced. A laminating piece rapid fixing device is arranged. Through the laminating piece rapid fixing device, the laminating piece can play a role of rapid fixing, stability is improved, and laminating quality is improved, product quality is guaranteed, market reputation is improved, rework rate is reduced, and cost waste is saved.

The invention relates to the technical field of air compression, in particular to an air compression device and an air compressor. The air compression device comprises an air cylinder, an air cylinderhead, a piston assembly, a connecting rod and a valve plate assembly. The air cylinder comprises an air cylinder body and a piston cavity axially penetrating through the air cylinder body. The pistonassembly is slidably connected with the piston cavity in a sealed mode. The valve plate assembly is fixedly connected between the air cylinder head and the air cylinder. According to the air compression device of the structure, the valve plate assembly has the functions of air suction and exhausting, compared with the mode that an air suction component and an exhaust component are separately arranged in the prior art, the structure is simpler and more compact, and the production cost is lower, the assembly efficiency is higher, and due to the integrated functions, replacement and repair are more convenient. The air cylinder and the air cylinder head have a cooling and heat dissipation mode combining internal cooling and external heat dissipation, the working temperature can be effectivelylowered, and thus the continuous working time and service life of the air compression device are prolonged.

The invention discloses a cart type lawn mower, which comprises a first motor, a cutter head, blades, a water hydrogen machine, a raw material storage container, travelling wheels, a second motor, a first shell body, a second shell body, armrests and a main control circuit, wherein the first motor, the cutter head and the second motor are arranged in the first shell body; a cutting cavity is formed in the lower part of the first shell body, the cutter head is arranged in the cutting cavity, and the cutter head is provided with the blades; the first motor is connected with the cutter head, andthe first motor drives the cutter head to rotate, so as to drive the blades to rotate; each travelling wheel is provided with a driving shaft, the second motor is connected with the driving shafts ofthe traveling wheels, and the second motor drives the traveling wheel to travel; and the armrests are connected with the first shell body, and the driving shafts of the traveling wheels are connectedwith the first shell body by means of bearings. The cart type lawn mower provided by the invention can reduce the equipment noise, can ensure continuous operation of the machine, and does not rely onnon-renewable resources. In addition, the required expense is lower through generating power by utilizing methanol, and the user cost can be effectively reduced.