235results about How to "Work resistance is small" patented technology

The invention relates to an air-powered engine assembly, which comprises an air tank, an air valve, an air distributor, an intake pipe, camshafts, an intake duct, an exhaust control device, air cylinders, pistons, crankshafts, couplers, clutches, automatic gearboxes and differentials connected with the outside. The assembly is characterized in that the air valve, a constant pressure chamber and a pressure controller are arranged between the air tank and the air distributor; the air distributor is connected with a plurality of air cylinders on an air cylinder gasket; each air cylinder is connected with an exhaust chamber through an exhaust manifold; the exhaust chamber is provided with a turbine generator which is connected with a storage batter; the air cylinders are provided with the camshafts for controlling the air intake and exhaust of the air cylinders; the air cylinders are provided inside with the pistons for driving the crankshafts to rotate; the camshafts and the crankshafts are connected by chains; and the crankshafts are connected with the differentials through the couplers, the clutches and the gearboxes in turn. Therefore, doing work through air compression rather than fuel, the air-powered engine assembly has the advantages of avoiding waste gas discharge and air pollution, along with reliable operation, convenient operation, economical efficiency, practicality and so on. In addition, due to recycle of the waste gas for power generation, the air-powered engine assembly saves energy and reduces costs.

The invention discloses a mechanical type dual-cavity seeding apparatus. Two cavities are bilaterally symmetric. The mechanical type dual-cavity seeding apparatus comprises a seed box, shells, a seed feeding pipe, a seed charging nozzle, a left overturning type seed discharging cover, a right overturning type seed discharging cover, a left seed separating hairbrush, a right seed separating hairbrush, a seed discharging disc and a seed discharging shaft. A groove of the seed discharging disc, wall surfaces of the left shell and the right shell, the left seed separating hairbrush and the right seed separating hairbrush form a left seed filling cavity and a right seed filling cavity which are communicated with the seed feeding pipe, holes are formed in disc surfaces of two sides of the seed discharging disc, a left arc-shaped seed removing and protecting plate and a right arc-shaped seed removing and protecting plate as well as the left seed separating hairbrush and the right seed separating hairbrush are arranged on the inner sides of the left shell and the right shell, the left seed separating hairbrush and the right seed separating hairbrush prevent seeds from directly entering the seed charging nozzle from the left seed filling cavity and the right seed filling cavity, an upper end opening of the seed charging nozzle is aligned to the holes in the seed discharging disc, and seeds are filled in the holes along with the rotation of the seed discharging disc in a seed filling region, and then enter a seed removing region and a seed protecting region to complete seed removing and seed protecting, and finally enter a seed charging region to complete seed filling. The mechanical type dual-cavity seeding apparatus is novel in structure; by adopting a manner of filling the seeds, protecting the seeds and discharging seeds on the side edge of a dual-cavity vertical disc, the mechanical type dual-cavity seeding apparatus is compact in structure, capable of achieving precise and less hole sowing, and adjustable in row spacing.

The invention discloses a subsoiler based on a dynamic bionic principle. The subsoiler comprises a subsoiler mounting handle, a limiting device, a bidirectional torsion spring, a subsoiler handle, a subsoiler tip and a pulley, wherein the subsoiler mounting handle and the subsoiler handle are mounted through a bearing, so that the subsoiler handle can be rotated at the bottom of the soil; the pulley is mounted at the rear end of the subsoiler handle, is in contact with the limiting device and is used for supplying a support force along a heading direction and limiting the rotating angle; the bidirectional torsion spring is mounted at the external end of the bearing, so that the rotating resetting of the subsoiler is realized and the dynamic operation effect is achieved; the subsoiler is optimized through bionic curve design, so that the improvement of the soil-breaking property is ensured; the dynamic bionic principle is designed and the moving form of the whole subsoiler is similar to the forms of the animals, such as, earthworm, mole cricket, and the like, in the moving process, so that the dynamic bionic motion is realized.

The invention discloses a hydraulic balance control method and a control system for secondary circulation. The control method comprises the steps that a flow threshold or a temperature difference threshold corresponding to the heating area of a terminal user is preset; a regulating control signal is output to control the home-entry heating flow for the corresponding terminal user according to the difference value of the current flow of the corresponding terminal user and the flow threshold, and the difference value of the current temperature difference and the temperature difference threshold. The home-entry hot water flow can be accurately controlled by optimizing design, so that stable secondary circulation hydraulic balance can be realized, and the system operating resistance generated by hydraulic balance is reduced. According to the control system, for each terminal user, an electric regulating valve is arranged in a home-entry heat supply pipeline or an outlet water return pipeline of the corresponding terminal user; a flow acquisition device is used for acquiring the current flow of the corresponding terminal user; a controller is used for outputting a regulating control signal to the electric regulating valve for controlling the home-entry heat supply flow of the corresponding terminal user according to the difference value of the current flow and the preset flow threshold of the corresponding terminal user.

The invention discloses a cutting, shifting and blocking preventing device, and belongs to the technical field of agricultural machinery. The cutting, shifting and blocking preventing device comprises a spindle, connecting sleeve plates, inclined plates, a breaking and cutting device and stubble shifting and blocking preventing devices, wherein the breaking and cutting device is mounted in the middle of the spindle, two groups of stubble shifting and blocking preventing devices are symmetrical about the breaking and cutting device and connected to two ends of the spindle, stubble shifting wheels of the stubble shifting and blocking preventing devices and breaking and cutting discs of the breaking and cutting device form deflection angles, and accordingly, the two symmetrical stubble shifting wheels are mounted on two sides of the end part of the breaking and breaking and cutting device in a splayed manner and simultaneously backwards shift stubble and laterally push stubble, straw and weeds; the connecting sleeve plates are symmetrically connected between the breaking and cutting device and the stubble shifting and blocking preventing devices on the spindle and are simultaneously connected with the stubble shifting and blocking preventing devices respectively; and during working, the two connecting sleeve plates are connected with a no-tillage planter for corn ridge culture respectively. The device can cut the stubble, straw and weeds, can shift the stubble, can throw the straw, the stubble and the weeds to the rear side and can push the straw, the stubble and the weeds to furrows on two sides, a clean seed bed is formed on a ridge, blocking is reduced, and the breaking and cutting quality is guaranteed.

The invention provides a cutaway disk type stubble breaking knife and a stubble-breaking and furrowing device. The cutaway disk type stubble breaking knife is characterized in that cutting edge shape of the helical cutaway disk type stubble breaking knife is established according to the parameter equation; a standing plate of the stubble-breaking and furrowing device is fixedly connected with a mandrel which is bent from the middle towards the two ends; two multi-cutaway disk type stubble breaking knifes are in rotational connection with two ends of the mandrel through a bearing and are configured at an included angle of 12 degrees; a furrower connector is connected with the lower end of the standing plate, and adjusting holes in rows are formed in the furrower connector; the furrower having furrowing edges at the front end is assembled on the furrower connector through a bolt; a seed throwing pipe is fixed at the rear part of the standing plate through a connection plate. The stubble-breaking and furrowing device can ensure the stubble-breaking quality, prevents winding and blockage of the broken stubbles, and has no problem of missing cutting, and also has the advantages of relatively lower working resistance, relatively strong soil-in ability, order, straight and depth-uniform ditch, adjustable depth, wide application range, simple structure, and convenient adjustment, disassembly, assembly and maintenance.

The invention discloses a liquid open machine comprising a frame arranged with a liquid inlet and a liquid outlet, wherein the frame comprises an open device, a fiber leather separator and a discharge device communicated with a material outlet at one side of the frame, the open device, the fiber leather separator and the discharge device are all connected with a power transmitter. The open device is composed of a rotor and a casing in a chamber of the frame, while the rotor can be arranged with a dial flake or cam. The invention uses the rotor to move liquid and leather block in frame at high speed, to impact the block at high speed to be opened. Compared with prior art, the invention has simple structure, improved working efficiency, better leather fiber quality, long service life of device and low energy consumption.

The invention discloses a corn directional seeding device, a no-tillage directional planter and a no-tillage directional joint operation unit, relating to a seeding device and a unit. The invention aims at providing the corn directional seeding device, the no-tillage directional wide-narrow line spacing planter and the no-tillage directional joint operation unit which are capable of creating an optimal group structure for corn growth by adopting corn seed products recorded with corn growth information. The corn directional seeding device is characterized by comprising a seed branch box, a seed branch supplying mechanism, a seed pushing mechanism, a seed picking mechanism and a seeding mechanism, wherein a seed branch outlet is aligned to a seed picking groove, and picked seeds are pushed into soil under the pushing of a seed pushing rod. According to the no-tillage directional wide-narrow line spacing planter and the no-tillage directional joint operation unit which are provided with the corn directional seeding device, the seed information is utilized for controlling leaf growth direction and realizing alternative arrangement and tidy growth, symmetrical ear growth and wide-narrow line plant of dual-line plants, the group structure in reasonable close planting and transparent crop growth microenvironment can be created, real no-tillage seeding can be realized, and thus the corn production can be greatly increased.

The invention belongs to the technical field of livestock machinery, and relates to a hand-propelled semi-mechanized yak excrement pick-up vehicle, which is used for solving the problem of pick-up of dry and semi-dry yak excrement in regions such as the Qinghai-Tibet Plateau and the like. The entire hand-propelled semi-mechanized yak excrement pick-up vehicle is bilaterally symmetric, and comprises a pick-up mechanism, a conveying mechanism, a control mechanism and a storage mechanism, wherein the pick-up mechanism has a ''scissors reciprocating'' spade-shaped structure; the conveying mechanism is used for automatically conveying yak excrement into a storage groove by using the elastic potential energy of a torsion spring; the control mechanism is used for controlling a brake line to complete ejection and reset actions of a spade plate through a hand brake, so that yak excrement pick-up and stored material transport functions are realized; and the storage mechanism comprises a storage groove and a cloth bag, and is used for storing picked yak excrement. A ''scissors reciprocating'' spade in the hand-propelled semi-mechanized yak excrement pick-up vehicle has lower working resistance, is convenient, and contributes to saving labor; and moreover, the magnitude of force used for spading yak excrement can be controlled through a handle, so that the magnitude for force can be controlled reasonably according to different situations. According to the hand-propelled semi-mechanized yak excrement pick-up vehicle, yak excrement pick-up machinery is realized for the first time, and the problems of low efficiency, high labor intensity and the like existing in the conventional way for manually picking up yak excrement are solved; and moreover, the hand-propelled semi-mechanized yak excrement pick-up vehicle is easy to operate, and has low energy consumption.

The invention discloses a multi-functional road sweeper, which is characterized in that a rolling-brush support frame which can flexibly slide upwards and downwards is arranged in front of a bucket-tipping waste bin; the inside of the rolling-brush support frame is provided with a plurality of gradually-accelerated fan-blade type counter-rotating sweeping rolling-brushes which are horizontally arranged upwards; a garbage guide cover which is provided with arc upper and lower ends and tangent to all the counter-rotating sweeping rolling-brushes is fixedly arranged in front of the rolling-brush support frame; and the fan-blade type counter-rotating sweeping rolling-brushes are driven to simultaneously carry out counter-rotating operation by the powers output by an internal-combustion engine or a direct-current motor, thereby achieving the purpose of sweeping the garbage on road surfaces; and a dust collecting cover is arranged at a dust-raising part above a sweeping scrap chopper, and connected with a dust guide pipe so as to lead dust in a dust-filtrating water storage tank, thereby achieving the purpose of dust purification. According to the invention, through setting up a dust-filtrating water storage tank at a proper position at the top of a cab, and leading dust in the places under or above the water surface of the dust-filtrating water storage tank by the dust guide pipe, and under the actions of a powerful suction fan, water and dust-filtrating rolling brushes, the purposes of purifying the dust in bucket-tipping waste bins and producing the negative pressure are achieved.

The invention relates to a subsoiling rotary tillage combined soil preparation machine, which belongs to the technical field of agriculture machinery subsoiling soil preparation and aims at solving the technical problems to provide the subsoiling rotary tillage combined soil preparation machine with the advantages that the structure is simple, the operation quality is high, and the cost is low. The subsoiling rotary tillage combined soil preparation machine adopts the technical scheme that a steering transmission box is arranged in the middle above a machine frame, the two ends of an output shaft of the transmission box are respectively connected with one end of a rotary tillage cutter shaft, the two rotary tillage cutter shafts are in linear horizontal arrangement, in addition, the other ends of the two rotary tillage cutter shafts are respectively and movably arranged at two sides of the machine frame through bearings, a plurality of rotary tillage cutters are respectively arranged on each rotary tillage cutter shaft, in addition, a front chiseling type subsoiling shovel is arranged on a front beam of the machine frame, two ground wheels are arranged at the front end of the machine frame and are respectively positioned at the two sides of the front chiseling type subsoiling shovel, a plurality of back chiseling type subsoiling shovels are arranged at the back part of the machine frame, the back end of the machine fame is provided with a grinding plate, the lower end of the grinding plate is connected with the back end of the machine frame through a plurality of pressure springs, and an included angle is formed between the grinding plate and the pressure springs. The subsoiling rotary tillage combined soil preparation machine is mainly used for the subsoiling soil preparation before the seeding.

The invention discloses a whirlwind water film wet dust removal axial flow fan, composed of an axial flow fan; wherein the rear part of the axial flow fan is connected with a whirl water film dust removal device which is composed of an outer cylinder of the whirlwind water film dust removal device, an inner cylinder of the whirlwind water film dust removal device and a spiral flow deflector. The whirlwind water film wet dust removal axial flow fan has no auxiliary spraying device, high dust removal efficiency, low working resistance and low fan operating cost.

The invention discloses a bionic fertilizer placer. A bionic ripple structure is distributed on the core ploughshare surface of the placer and is of a diamond bionic geometric structure. A diamond bionic geometric structure unit and a core ploughshare base body which are positioned on the diamond geometric structure are both made of superhigh molecular weight hydrophobic materials of polyethylene, compound materials or the like. A cavity is positioned at the back of the core ploughshare base body, a plurality of through holes communicated with the cavity are arranged on the diamond bionic geometric structure unit, and the cavity is provided with an air / liquid inlet pipe. The bionic fertilizer placer has the effect of reducing soil resistance and power consumption, can improve quality of sowing and fertilizing and reduces working resistance of ditching parts.

The invention relates to the technical field of mechanized potato sowing equipment, in particular to a digger for potatoes in dry land with all membrane double ditches. The small vibration-sieve type potato digger comprises a frame (2), a diagonal draw bar (3), a digging shovel component (7), a swing mechanism (1), a driving mechanism (8), a limit mechanism (5), a clutch (6) and a hanging mechanism (4). The frame (2) is hooked to a tractor traction box. A rectangular sliding groove is formed in the hanging mechanism (4), a beam frame of the limit mechanism (6) penetrates the sliding groove, and the position, where the beam frame of the limit mechanism (6) is positioned, can change the depth of the digging. The digging shovel component (7) is fixedly jointed to the swing mechanism (1) through bolts. The driving mechanism (8) is disposed between the hanging mechanism (4) and the swing mechanism (1). The diagonal draw bar (3) is disposed between the swing mechanism (1) and the hanging mechanism (4). Due to the fact that the small vibration-sieve type potato digger can be matched with a small-power walking tractor to meet the requirements for digging potatoes in small plots such as terraced fields and hilly mountains, the problems that small potato diggers are large in digging resistance and unadjustable in penetrating angles of the digging shovels are solved.

The invention provides a novel reciprocated type propelling device, which is mainly formed by a crank slide block mechanism and a water pushing disc, wherein a slide block of the crank slide block mechanism is in matched connection with an axial hole of the center of the water pushing disc through a shaft; power is input to a crank of the crank slide block mechanism; rotation of the crank is converted into straight-line reciprocated movement for driving the water pushing disc by the slide block; the water pushing disc is in a circular-disc-shaped structure and is provided with a through circular-hole-shaped water flow channel; the water pushing disc is further provided with a rubber cushion; and the rubber cushion is fixed through a bolt at the edge part of the water flow channel and covers one end of the water flow channel. With the adoption of the matching of the rubber cushion and the water flow channel on the water pushing disc, the aim of forwards pushing water is realized and the structure is simple; meanwhile, the edge adopts a circular angle and a suitable area ratio of the water flow channel to the water pushing disc so that the working resistance is reduced under the condition that the strength and the rigidity of the water pushing disc are not of not influenced; and the water pushing efficiency is improved, and the elusiveness and the safety are improved.

The invention provides a bionic design method making a centrifugal pump have resistance reducing and noise lowering performance. The position, close to a blade outlet, of a blade work face of an impeller is provided with a plurality of V-shaped grooves similar with shark skin; the plurality of V-shaped grooves are parallel with each other and are arranged in the hydraulic force flow direction; thecut-off surface, at the position of the blade outlet, of each V-shaped groove is flush with the blade outlet; an arc line protruding structure similar with the front edge of a bird wing is arranged nearby a separation tongue of a volute; the contour of the longitudinal section of the arc line protruding structure is in the shape of a linear sine curve; a starting point of the arc line protrudingstructure is located at the position, tangent with the basic circle, of the separation tongue; and an ending point is located between a first fracture surface and a second fracture surface of the volute. Due to the structural design of the V-shaped grooves of the bionic design method, the jet wake and boundary layer separation phenomenon can be effectively controlled, the impeller working resistance is lowered, the work efficiency of the centrifugal pump is improved, the arc line protruding structure can effectively control the pressure pulse of the centrifugal pump at the position of the separation tongue, the dynamic and static interference effect at the position is reduced, and therefore noise generated when the centrifugal pump runs is lowered.

The invention belongs to the technical field of tunneling assembly, relating to an exchangeable blade type center cutter for a shield machine; the center cutter comprises a blade seat, a center cutter block and three side cutters; a center cutter block locating post and three knife rests are arranged on the blade seat; the middle part of the locating post is provided with a center cutter block locating hole; the bottom part of the center cutter block is fixedly connected with the blade seat; a cone-shaped lug boss is fixedly connected with the end of the locating post; an inner hole is arranged on the cone-shaped lug boss; the sizes of the inner hole of the lug boss and the center cutter block locating hole are matched with that of the center cutter block; three knife rests are arranged on the periphery of the center cutter block locating post; a groove joint which is fixedly connected with the side cutter is arranged on each knife rest; locating holes are arranged on the three side cutters and are respectively fixedly connected in the groove joints of three knife rests through bolts; three cutter arms formed by the side cutters and the knife rests form an included angle of 120 degrees. The center cutter has better stability in the tunneling process, higher impact resistance and abrasion resistance, and is easy to replace the blade, so that the waste of resource is avoided and the construction cost is saved; therefore, the center cutter has higher economical value.

The invention discloses a rice tray growing seedling growing tray shipping machine, and belongs to the technical filed of agricultural machinery. The rice tray growing seedling growing tray shipping machine comprises a machine frame, a seedling tray spade, and a delivery mechanism, wherein a walking mechanism and a veering mechanism are arranged at the lower end of the machine frame separately, the seedling tray spade is arranged at the front end of the heading direction of the machine frame, and a seedling tray frame is arranged at the rear end of the machine frame, the seedling tray spade is arranged at the front end of the heading direction of the machine frame, and is used for scooping up a seedling tray, the delivery mechanism is arranged on the machine frame between the seedling tray spade and the seedling tray frame, and delivers the seedling tray which is scooped off the ground by the seedling tray spade to the seedling tray frame. In the rice tray growing seedling growing tray shipping machine, the vertical-type folding seedling tray spade is adopted to scoop up the seedling tray, when the seedling tray is off the ground, carried mud is reduced, the work resistance is reduced, and thus the seedling tray is conveniently scooped up. A shipping belt with the combination of a straight line section and an inclined section is adopted to deliver the seedling tray, the seedling tray frame is arranged at the tail end of a delivery belt on the machine frame, and a signal is detected and transferred through a photoelectric switch to control a motor to run. The rice tray growing seedling growing tray shipping machine is smooth in shipping, simple in structure, flexible in use, high in working efficiency, and accurate in control.

The invention relates to a folding paddy-field temper mill which belongs to the agricultural machinery technical field. The folding paddy-field temper mill comprises a center main frame, a suspending frame, a hydraulic cylinder, pu rollers, a left auxiliary frame and a right auxiliary frame, wherein the pu rollers are respectively arranged under the center main frame, the left auxiliary frame and the right auxiliary frame, a left connecting base and a right connecting base are respectively arranged on the left auxiliary frame and the right auxiliary frame, and a fixing frame A and a fixing frame B which are respectively connected with the left connecting base and the right connecting base through the hydraulic cylinder are arranged on the center main frame. The folding paddy-field temper mill has the advantages of being capable of performing the plowing and smashing operation on farmland soil and simultaneously pressing weeds deep into soil as nutrients of plants being cultivated after decay through vanes of the pu rollers; solving the problems that the weeds often float on the surface of the farmland, the cultivation quality and the crop yield of the farmland are affected and simultaneously the management work in the later period of the farmland is increased after utilizing the existing rotary tiller to perform the plowing operation and being particularly suitable for the leveling operation of the paddy field.

The invention discloses a combined subsoiler which comprises a main machine frame. A traction frame and a plurality of harrow needles are installed on the main machine frame in a detachable mode through fastening parts. A plurality of shovel handle fixing seats are arranged on the main machine frame, a two-layer sub-soiling shovel is arranged on each shovel handle fixing seat through a fastening part, each two-layer sub-soiling shovel comprises a shovel handle, a breaking shovel and a sub-soiling shovel are arranged on the shovel handle, and the breaking shovel is arranged above the sub-soiling shovel. The combined subsoiler is simple in structure, capable of achieving light weight, convenient to combine, easy and convenient to operate, little in operation resistance, low in manufacture cost and easy to popularize.

An improved sweeping-mopping machine is composed of a casing with a push bar on it, two front wheels, the central drum brush and two side disk brushes, which are driven by said front wheels, and a tail drum mop.

The invention discloses a safety pressure-limiting valve, which comprises a valve body and a valve stem, wherein the valve stem is arranged in the valve body; the valve stem is a cylindrical hollow body in which a partition is arranged to divide the hollow body into an upper segment and a lower segment; a pressure spring is arranged in an upper-segment cavity; a lower-segment valve stem is provided with a valve hole; two valve sleeves are arranged on the valve stem; the inner edge of each valve sleeve is fixedly connected with the periphery of the valve stem; the outer edge of each valve sleeve is fixedly connected with the periphery of an inner cavity of the valve body; an input cavity is formed between two valve sleeves; a pressure-regulating bolt is arranged above the valve body; and the pressure spring is arranged between the pressure-regulating bolt and the partition. The valve has good control sensitivity, cannot be affected by the pressure of an input end, has sealing parts not easy to deform of wear, does not leak, is long in lifespan, and can be used for the safety pressure limitation of gaseous or liquid containers.

The invention discloses an energy-saving high-efficiency tapioca root harvester comprising a lifting traction subassembly, a pull rod, a frame and perching knife subassemblies, wherein the lifting traction subassembly is articulated on a vehicle body, the pull rod is fixed on the vehicle body, the lifting traction subassembly is articulated with a hanging hole seat at the front end of the frame, and the pull rod is articulated with a connecting long plate of the frame. The energy-saving high-efficiency tapioca root harvester is characterized in that each perching knife subassembly comprises asupporting post, a shovel holder, wing shovel fixing plates, a wing shovel and a shovel point; the upper end of the supporting post is fixed at the bottom of a main beam of the frame, the lower end ofthe supporting post is provided with the shovel holder, the front end of the shovel holder is provided with the shovel point, both sides of the shovel holder are provided with the sloping wing shovelfixing plates, and the wing shovel is connected with the wing shovel fixing plates in a removable mode. The three perching knife subassemblies are not arrayed side by side but in a staggered mode, each wing shovel only harvests a half ridge of tapioca roots, and therefore, the perching knife subassemblies greatly reduce the operation resistance. The energy-saving high-efficiency tapioca root harvester has low energy consumption and high production efficiency and can regulate the burying angle and the burying depth of the perching knife subassemblies by the telescopic pull rod and a connectingrod.

The invention relates to a bionic curved surface structure and a construction method of an agricultural machine tool soil-touching part based on a reverse engineering technology, belonging to the technical field of agricultural machinery equipment. A surface is fit by five curve fitting equation, one end of that surface is cut by a section of arc as a cross section, and the other end of the surface is smoothly connected. Based on reverse engineering technology and bionics theory, point cloud was obtained from the back surface of Takydromusmongolicus and several back curves were extracted. Fiveparallel and equal width curves were selected to fit the curve trajectory into equation. Finally, a section of arc is taken as the cross-section and the five equations are smoothly connected to complete the construction of biomimetic surface structure. The bionic curved surface structure of the invention is used as a bionic curved surface plowshare soil-contacting part and has the advantages of strong insertion ability of the soil-contacting part into the soil, low working resistance and reduced damage degree of the plow body curved surface to the soil when the bionic curved surface plowsharesoil-contacting part is applied in practice.

The invention relates to a pick for coal mining and engineering, which is composed of a main pick made of hard alloy and a pick body. the periphery of the main pick made of hard alloy on the pick body is provided with an auxiliary pick, the end of the auxiliary pick is a pick tip or pick blade which can participate the cutting work, which not only protects the pick body, but also greatly reduces the work resistance. The invention has good and reliable rotation performance, realizes the equal strength design of pick nip and pick body, and improves the explosion-preventing safety of coal mining work.

A deep scarifying, stubble cleaning and soil pulverizing machine comprises a large machine frame, wherein a front three-point linkage device is arranged at the front end of the large machine frame, a rear three-point linkage device is arranged at the rear end of the large machine frame, a deep scarifying is arranged below the large machine frame, a disc type stubble cleaning device is arranged on the portion, behind the deep scarifying device, of the rear three-point linkage device, and a soil pulverizing device is arranged at the rear end of the disc type stubble cleaning device. By the adoption of the machine, work which needs to be done in three times during previous agricultural production can be done at a time, and labor productivity is improved effectively. The deep scarifying device directly breaks a plow pan to guarantee crop root growth and exchange of moisture and air of deep soil, and a buffer device designed in the deep scarifying device can reduce the damage of hard objects such as stone and tree roots in soil to a deep shovel to the maximum degree. Furthermore, working resistance can be reduced by means of self-excited vibration. A damping bar designed in the disc type stubble cleaning device not only can absorb shock, but also has a terrain simulating function, and the working effect of the machine is improved.

The invention discloses a combine harvester of a beet. The combine harvester is assorted with a wheeled tractor and belongs to the field of an agricultural machine. The combine harvester of the beet comprises a drawing frame, a frame, a searching device, an excavating device, a throwing device, a soil-removing and conveying device, a lifting device, a collecting box, a hydraulic system, and a driving system, wherein the drawing frame is placed in front of the frame and hinged with the frame through a bolt; the lower part of the frame is provided with the searching device, the excavating device, the throwing device and the soil-removing and conveying device; the collecting box is arranged on the frame, and the rear part of the frame is provided with the lifting device; the searching device is arranged at the front lower part of the frame and the front part of the excavating device; the rear part of the excavating device is provided with the throwing device; and the rear part of the throwing device is provided with the soil-removing and conveying device. The combine harvester of the beet is high-efficient and reliable in power transmission; and with the adoption of the combine harvester of the beet, the beet searching, excavation, soil-removing, conveying, lifting and collecting procedures of the beet can be finished at one time; furthermore, the combine harvester of the beet is convenient to adjust a forward direction, small in working resistance, good in soil removing effect, reliable in running, and simple in structure.

The invention relates to a method for improving an underground coal mine negative pressure suction dust removal technology. According to the method, a horn opening, high-pressure water jet pumps and high-pressure gas jet pumps are additionally arranged in front of an air inlet of an axial flow fan, and a water film dust removal barrel is additionally arranged at an air outlet of the axial flow fan; water, dust and fog are fully mixed through the high-pressure water jet pumps, the high-pressure gas jet pumps and the axial flow fan, and then the water, dust and fog are separated out by the water film dust removal barrel. The method for improving the underground coal mine negative pressure suction dust removal technology has the advantages of being small in investment, fast to take effect, obvious in dust removal effect and suitable for coal mine driving face dust removal.

The invention belongs to the technical field of agricultural machinery, which is used for solving the problem that an existing bucket wheel seeding device in high-speed operation is poor in seeding quality, and designs a double-bucket-wheel opposite type high-speed precise corn seeding device. The seeding device comprises a seeding device shell, seeding device components and a seeding shaft, wherein the seeding device shell is of a split symmetrical structure, and is integrally fixed on a rack; left and right seeding device components comprising seed guiding wheels, baffles and seeding bucket wheels are combined integrally by the seeding shaft; the baffles are installed between the seed guiding wheels and the bucket wheels; transparent semi-shells with movable seed charge guide pipes and the left and right seeding device components form a left seed chamber and a right seed chamber; to-be-sown seeds enter the seed chambers via the seed charge guide pipes from a seed box, and scoops of the bucket wheels discharge seeds uniformly. The double-bucket-wheel opposite type high-speed precise corn seeding device is used for sowing hole sowing crops at high speed, such as corn, peanuts, soybeans, or two crops are sown alternatively; synchronous fertilization of seed manure for micro element fertilizers and successive alternative synchronous fertilization of seed manure also can be achieved without generating the phenomenon of seedling burning due to mixing of seed manure.

The invention discloses a yam bean harvester integrating seedlings, digging, collecting and storing, mud removing and straw turnover, which comprises a planetary gear type seedling device, a first motor, a yam bean collecting and storing device, wheels, a soil turning device, a straw turnover device, a second motor, a frame and a digging device. The frame is a main bracket; the planetary gear typeseedling device and the first motor are arranged at the front end of the frame and are connected through a belt; the straw turnover device, the soil turning device and the digging device are all driven by the second motor through a belt wheel; aconveying belt is fixed on the rear end of the frame through a hydraulic rod; the yam bean collecting and storing device is arranged in the middle of theframe and is arranged at the tail end of the conveying belt; According to the invention, a plurality of functions, such as seeding, digging, collecting and storing, mud removing, straw turnover and the like, are integrated, the energy consumption is effectively reduced when the seedling is planted, the soil turning is sufficiently and the yam bean is difficult to damage, the working efficiency ofthe potato harvesting machine can be obviously improved, and the energy consumption is low.