100results about How to "Reasonable and practical design" patented technology

The invention provides a biomass pellet fuel heating appliance, comprising a combustion furnace, a heat exchanger, a central supply system for supplying biomass pellet fuel to the combustion furnace, and a barn; the heat exchanger is used for being connected to one end of a horizontal nozzle of the combustion furnace, the barn includes a heating chamber, the heat exchanger is disposed in the heating chamber, and the combustion furnace and the central supply system are disposed outside the barn; the central supply system is used for providing biomass pellet fuel centrally for more than two combustion furnaces and comprises a suction unit with a vacuum pump, a storage barrel, more than two suction pipes, more than two feed pipes, a screw feeding mechanism, a feeding distribution connector, more than two electromagnetic valves, more than two vacuum buckets and more than two gravity valves. The heating appliance provided herein is reasonable and practical in design, safe and green, and efficient and labor-saving, reduces cost, saves resources, improves work efficiency and enterprise economic benefit, and is suitable for popularization and use.

The invention discloses a three-in-one drilling and flocking machine with a large disk, a flat plate and a rod brush and relates to a structure of a drilling and flocking machine. The three-in-one drilling and flocking machine comprises a machine body workbench, a handpiece placement table, a handpiece left and right movement mechanism, a handpiece up-and-down movement mechanism, a rod brush clamp, a disk clamp and a flat plate clamp, wherein the handpiece placement table, the handpiece left and right movement mechanism, the handpiece up-and-down movement mechanism and the rod brush clamp all are arranged on the machine body workbench; and at most one of the disk clamp and the flat plate clamp is arranged in the middle of the machine body workbench. The three-in-one drilling and flocking machine can meet the modern production requirements of high efficiency, high quality and high grade, and is stable in product performance, powerful in function and simple in operation, and standardized production of parts is implemented.

The invention provides regeneration of an agent for removing oxygenated compounds in etherified C4, which is reasonable and practicable in design and low in cost, and application thereof, and. In order to solve the absorbent inactivation problem of subsequent processes when the oxygenated compound-containing etherified C4 fraction is served as a chemical raw material, the invention provides an absorbent. The absorbent consists of 25-40% of a molecular sieve, 45-65% of aluminium oxide and 10-15% of a modified component, wherein the etherified C4 mixture is served as a raw material and is removed with the oxygenated compounds in a fixed bed reactor. The absorbent can be repeatedly used after regeneration. The technology for removing the oxygenated compounds is simple and convenient to operate, and the agent can be used for a long period and has high purity; and moreover, the agent is simple in regeneration method and has a long service life.

The invention provides a machine tool for automatically milling two end faces and drilling central holes of a pin shaft. According to the machine tool, central hole drilling and one-outer-circle sleeving and turning are combined into one working procedure, automatic feeding and automatic discharging are carried out, and the production efficiency is greatly improved. The machine tool is mainly composed of a tool frame assembly, an automatic positioning device, an automatic clamping device, an automatic feeding device, an automatic double-face milling device, an automatic central hole drilling and sleeving-turning device and an automatic discharging device. The machine tool is reasonable and practical in design, two-end-face milling, central hole drilling and one-outer-circle sleeving and turning are combined into one working procedure, automatic feeding and automatic discharging are achieved, the speed is high, labor and time are saved, the concentricity of the central holes of the two ends is high, the grinding allowance is small, the production efficiency and the economic benefits of an enterprise are improved, the quality of a machined product is excellent, and the machine tool particularly meets the large-scale production requirement.

The invention provides an environment-friendly carbon-hydrogen solvent low-pressure hydrogenation dearomatization reactor and a catalyst packing method. The method of layered matching packing of porcelain balls of different grain diameters and catalysts of different grain diameters and different shapes is adopted, material short pass or bed layer sinking can be prevented, fluid distribution and pressure drop in a catalyst bed layer are effectively improved, distribution and mixing effects of a hydrogen cooling system are enhanced, a reaction medium and a catalyst contact evenly, the medium in the reactor flows uniformly, and the reactor size is reduced on the whole, so as to guarantee an optimum depth and speed of hydrogenation dearomatization reaction, improve yield of ideal components, reduce device investment and product processing cost and improve comprehensive utilization added value of light dydrocarbon raw materials. The environment-friendly carbon-hydrogen solvent low-pressure hydrogenation dearomatization reactor has the advantages of being high in reaction efficiency, high in production capacity, convenient to manufacture and maintain and is intelligent in temperature control; and after fractionation, the purity of an alkane product is 99% or above.

The invention provides a soil covering type broadcast seeder. The soil covering type broadcast seeder is mainly composed of traveling wheels, a guiding rotating shaft, a soil conveying trough, a soil conveying mechanism, a soil feeding rotating roller, an outer power input shaft, a main input box, a rack, seed bins, conveying pipes, a fertilizer bin and a seed broadcast roller. Seeds are evenly broadcast through the guiding rotating shaft and the seed broadcast roller, and then the seeds are covered with mixed soil through the soil feeding rotating roller and the soil conveying mechanism via the soil conveying trough. The broadcast seeder increases the number of seedlings, the single yield per mu of wheat is increased by more than 1 / 3, and the problems that a traditional ridge sowing planting mode is used for a long time and consequently the yield of wheat is low, cost is high, expenses are high and earnings are low is solved thoroughly. The broadcast seeder reduces land wastage and effective consumption of various resources; higher earnings are obtained when the same investment is used. The broadcast seeder is reasonable and practical in design, so that seeding and soil covering are completed at a time, labor and time are saved, straw in fields is smashed while the seeds are broadcast, the straw serving as green manure is fully applied to soil, and the ecological environment is protected.

The invention provides a tire tread prescription of an ultra-wearproof graphene material for a full steel tire. The tire tread prescription adopts the technical scheme that the tire tread prescription comprises 1.5 to 2.5 parts of graphene, 80 parts of natural rubber, 10 parts of polybutadiene rubber, 10 parts of butadiene-styrene rubber, and 45 to 55 parts of carbon black. The tire tread prescription is used for preparing a tire crown (1). The tire tread prescription is specifically characterized in that the tire crown (1) is arranged on a steel wire part of a bundle layer, a tire side (2) is connected with a rubber core (3), and the rubber core (3) is connected with a steel wire ring (4). The tire tread prescription has the beneficial effects that the design is reasonable and practical; the wearproof property of the traditional tire crown prescription is improved; the ultra-wearproof property is excellent; the total service life of the tire is greatly prolonged; the tire tread prescription is suitable for being popularized and applied.

The invention provides a folding type air purification filtering plate.According to the technical scheme, press strips (2) are arranged in a metal groove (1), a chemical fiber cloth (4) is provided with polyurethane foam plastic isolation strips (3), and the surfaces of the two sides of the chemical fiber cloth (4) are coated with an adsorbing material; the adsorbing material takes 40%-50% of silica sol as a diluting and bonding agent and takes 25%-30% of kieselguhr and 25%-30% of zeolite as adsorbing functional packing, and 1%-2% of a hydrophobic material and a coupling agent are added; the polyurethane foam plastic isolation strips with the thickness of 2 mm and the width of 10 mm are oppositely stuck to the two sides of the chemical fiber cloth (4) every other 150 mm, and 4-mm gaps are formed among the folded cloth portions after the folding type air purification filtering plate is folded.The folding type air purification filtering plate has the advantages that the design is reasonable and practical, the whole plate is ventilated and unobstructed, and the functions of a filtering part and an adsorbing part of air purification equipment are achieved; in addition, the defect that a common paper filtering plate and activated carbon adsorption part cannot be repeatedly used is overcome, the service life is prolonged, and the manufacturing and using cost is lowered.

The invention provides a high-pressure, oxygen-free, yield-increasing and plug-release gas injection device of a CBM (Coal Bed Methane) well. The invention has the technical scheme that the high-pressure, oxygen-free, yield-increasing and plug-release gas injection device mainly consists of an internal combustion engine (1), a hydraulic clutch (2), a compressor (3), a fuel tank (4), a purification filter (5), gas transmission pipes (6), a dosing tank (7), a control cabinet (8) and a skid-mounted cabinet (9), wherein the internal combustion engine (1) is connected with the compressor (3) through the hydraulic clutch (2) and is connected with the compressor (3) through one gas transmission pipe (6); the compressor (3) is connected with the purification filter (5) through one gas transmission pipe (6); the fuel tank (4) is arranged above the purification filter (5); one gas transmission pipe (6) is connected with the dosing tank (7); the control cabinet (8) is arranged above the dosing tank (7). The invention also provides multiple steps of a using method of the high-pressure, oxygen-free, yield-increasing and plug-release gas injection device. According to the high-pressure, oxygen-free, yield-increasing and plug-release gas injection device of the CBM well and the using method, provided by the invention, the design is reasonable and practical, the cost is low, the operation is simple and convenient, more methane is replaced through injecting gas in a CBM reservoir, the yield of CBM is greatly increased, and a higher promotion and application value is obtained.

The present invention provides a rotifer high-density culture method including a technical scheme: seawater chlorella pyrenoidosa is used to feed rotifers with a seawater chlorella pyrenoidosa liquid concentration thrown into water body, namely a precipitation rate, of 20%-25%, a culture water body of 1500 L, a pH value controlled at 6.5-8, a dissolved oxygen concentration controlled at 3-25 mg / L, a water temperature controlled at 20-36 DEG C, and a salinity controlled at 19-30%. The control method of throwing the seawater chlorella pyrenoidosa into the water body is that intestine and stomach changes of the seawater chlorella pyrenoidosa are observed under a microscope in order to determine the application amount of the seawater chlorella pyrenoidosa. The PH value is adjusted with sodium bicarbonate or acetic acid, medium warming is performed in a circulating water way. Excretion of rotifers and residual baits are removed with hanging cloth. The culture method is reasonable and practical in design and time-saving and labor-saving. The cultured rotifer individuals are healthy and strong; and the culture method improves production efficiency and economic benefits of enterprises, and is suitable for general promotion and use.

The invention provides a wall decoration process. According to the technical scheme, plastic expansion bolts (16) and anti-falling fixing screws (17) are used for fixing anti-slip tooth openings (7) to a wall (18), punching positioning openings (6) are formed in the inner sides of the anti-slip tooth openings (7) which are also provided with adjusting sawtooth openings (8), and the anti-slip tooth openings (7) are connected with a wall decoration profile (1); a splicing clamping opening (5) is formed in the wall decoration profile (1), and a rubber strip clamping opening (4) is formed in one side of the wall decoration profile (1); the upper portion of a decoration process cover (3) is connected with a plate outer clamping strip (2), and the lower portion of the decoration process cover (3) is connected with a silicone sealant shell nosing (15) which is connected with a skirting line (14); a surface layer and EPS board bonding layer (11) is arranged on the outer side of a heat insulation board (12), and a decoration surface layer (10) is arranged on the outer side of the surface layer and EPS board bonding layer (11); and double-faced adhesive tape (9) is arranged at the joint of the heat insulation board (12) and the anti-slip tooth openings (7), and a structural adhesive point (13) is arranged at the joint of the wall (18) and the heat insulation board (12). According to the wall decoration process, the design is reasonable and practical, site assembling is convenient and rapid, energy is saved, and the environment is protected.

The invention provides a well electric hydraulic conversion high-lift plunger pump. According to the technical scheme, the well hydraulic conversion high-lift plunger pump is mainly composed of a cylindrical pump A (1), an A pump liquid outlet (2), an A pump liquid flow pipeline (3), an A pump work cavity (4), an A pump plunger (5), an A pump reversing valve (6), an A pump drain valve (7), a cylindrical power liquid tank (8), a power liquid pipe (9), a first power liquid pipe opening (10), a cylindrical pump B (11), a B pump plunger (12), a B pump shaft (13), a coupling device (14), a cylindrical motor (15), a motor shaft (16), a first connecting mechanism (17), a B pump plunger drive plate (18), a B pump oil distributing disc (19), a second connecting mechanism (20), a second power liquid pipe opening (21), a third connecting mechanism (22), an A pump liquid inlet valve (23), an A pump power liquid pipeline (24) and an A pump work liquid inlet (25). The well electric hydraulic conversion high-lift plunger pump is reasonable and practical in design, the problem of eccentric wear of a rod pipe is basically solved, the service life of an oil pipe is effectively prolonged, high efficiency and low consumption are achieved, and energy is saved.

The invention discloses a security anti-theft door, which comprises a wall, a door shaft, a key hole, a sub-door handle, a sub-door, a sub-door shaft, a camera, a door, a buffer pad, a peephole, a display screen, a door handle, a rack and a gear , door latch, fireproof layer, sound insulation layer, waterproof layer and sub-door latch, the peephole is installed on the central axis of the gate and is located at the upper part, the gate is a thickened structure, from the inside to the waterproof layer, the sound insulation layer and the fireproof layer , the door handle is installed on the lower side of the other side of the door, and a door lock is also provided under the door handle, the rack is connected to the upper surface of the door bolt by welding, and the gear is fixed on the front of the rack. above, and the gear and the rack are meshed and connected inside the gate, the two ends of the central axis of the gear are sleeved on the bearings, and the bearings are fixed on the inner walls of both sides inside the gate, the axis position of the central axis of the gear is set There is a keyhole.

The invention relates to winding equipment. Two cylindrical jig shafts are arranged correspondingly on an equipment frame, one cylindrical jig shaft is connected with a first translation driving mechanism, the two cylindrical jig shafts are the same in rotating direction, and the opposite inner ends of the two cylindrical jig shafts are each provided with a jig mold; a jig mandrel is arranged in the other cylindrical jig shaft, wherein the front end of the jig mandrel is sleeved with the corresponding jig mold at the inner end of the cylindrical jig shaft, the jig mandrel is connected with a second translation driving mechanism, the front end of the jig mandrel can stretch outside the forming face of the jig mold arranged at the front end of the jig mandrel in a sleeving mode and make contact with the forming face of the other jig mold, a line pressing and cutting mechanism is arranged between the front end of the jig mandrel and the other jig mold, and a stripping mechanism is arranged on the two jig molds or any jig mold and can make a hollow coil between the two jig molds break away from the forming faces of the two jig molds or the forming face of any one jig mold.

The invention provides a production method for a rubber-plastic subsea pipeline which is simple in structure and has a good use effect, and a connection structure for the subsea pipeline. The production method comprises the steps of producing a metal-glass fibre reinforced plastic composite tube at first, and then inserting a rubber-plastic tube in the metal tube to form a three-layer composite tube. The connection structure mainly comprises a lining rubber-plastic tube (1), a glass fibre reinforced plastic layer (2), a metal tube end external thread (3), a travelling buckle internal thread sleeve (4), an inner-layer rubber-plastic boss (5), annular sawteeth (6) and a metal tube end annular boss (7). The connection structure provided by the invention is reasonable and practical in design, metal-glass fibre reinforced plastic lining rubber-plastic subsea pipelines can be easily and simply butted, and the problems of corrosion and abrasion of the subsea pipelines are avoided, the properties of water resistance, heat insulation, rapid construction, rapid repair, external force damage prevention and the like of the subsea pipelines are achieved, and thus the running cycle of the pipelines is prolonged to 50 years.

The invention provides an oil sampling apparatus of a nitrogen-filled oil-immersed transformer and an oil sampling method. The nitrogen-filled oil-immersed transformer comprises a transformer and is characterized in that an oil drain valve pipeline of the transformer is provided with a pressure gage and a stop valve, a nitrogen cylinder is connected with a pipeline located between the pressure gage and the stop valve through a connection pipe, and the connection pipe is equipped with a nitrogen valve. According to the invention, improvement is made on the basis of an original oil drain valve pipeline, so the problem that an oil sample cannot be taken out due to ageing of an insulating material caused by suck-back of air into the interior of the transformer easily occurred during oil sampling of the nitrogen-filled oil-immersed transformer is overcome; the oil sampling apparatus provided by the invention has reasonable and practical design, is simple to operate and convenient and fast in oil sampling, substantially improves reliability and security and only takes 5 min in the whole operation; moreover, a reconstructed pipeline part can be integrally or partially dismounted and movably used, so the oil sampling apparatus is applicable to oil-immersed transformers filled with gas.

The invention provides a fixing pillow for preventing complications of an upper limb of an affected side of a stroke patient. A groove (3) of which the shape is similar to that of an arm of a human body is formed in the middle of the fixing pillow (1) in the length direction; a four-finger-shaped groove (4) which is connected with the groove (3) is formed in the front end of the groove (3); a first thumb groove (2) and a second thumb groove (2') are respectively formed in two sides of the four-finger-shaped groove (4); a first air bag (5) and a second air bag (5') are respectively arranged on two sides of the rear end of the groove (3); an upper hook-and-loop fastener (6) and a lower hook-and-loop fastener (61) are respectively arranged on the tops of the front end and the rear end of the groove (3); and finger hook-and-loop fasteners (62) are respectively arranged on the first thumb groove (2), the second thumb groove (2') and the four-finger-shaped groove (4). The fixing pillow for preventing the complications of the upper limb of the affected side of the stroke patient has the advantages that materials are collected conveniently, the fixing pillow is easy to manufacture and convenient to use, the upper limb of the affected side of the stroke patient can be kept at a good position for a long time, and a series of complications of the upper limb of the patient are prevented well.

The invention discloses a socket box with a side clamping plate bracket for accommodating things, which comprises a socket box body and a bracket, wherein the bracket is arranged at the bottom part of the side surface of one side of the socket box body; the bracket and the socket box body have an integrated connection structure; the bracket is parallelly arranged in relative to the horizontal plane; the surface at the inner side end of the bracket is provided with two side clamping plates which are the same in size and are vertically arranged relatively; a thing clamping groove is formed between the side clamping plates; a plurality of vent through guiding holes are arranged in the bracket; and a power jack is arranged in the socket box body. through the above mode, the bracket with side clamping plates can be arranged on the end surface at one side of the socket box, an accommodating platform for things such as a mobile phone which has no position to place in the case of charging can be provided, the bottom part can be supported by the bracket when things such as a mobile phone are placed, the other side can be clamped and fixed by the side clamping plates, the structure is compact, and the design is reasonable and practical.

A feeding robot of a drilling and tapping machine tool mainly comprises a housing body (1), a housing upper cover (2), a small driving chain wheel (3), a big driving chain wheel (4), a bearing chain wheel (5), a dust baffling plate (6), a chain pressing wheel (7), a bearing wheel (8), a first hammer (9), a sliding sleeve (10), a polished rod (11), a hoisting chain (12), a chain connector (13), a second hammer (14), a driving chain (15), a cylinder connector (16), a cylinder fixing plate (17), a hoisting cylinder (18), an upright post lacing bar (19), upright post angle iron (20), a turnplate (21), a bearing plate (22), turnplate steel balls (23), a turnplate pressing plate (24), a manipulator housing (25), a hoisting screw rod (26), a hoisting arm (27), a manipulator cylinder (28), a manipulator claw (29), a workpiece (30), bearing feet (31), a bottom plate (32), a shaft coupler (33), a rotatory cylinder (34), a turnplate shaft (35), a turnplate bearing (36), a bottom plate spacer sleeve (37) and V-shaped discharging iron (38). The feeding robot of the drilling and tapping machine tool improves the production efficiency.

The invention provides a novel coal tar hydrocracking device and a production method thereof. The novel coal tar hydrocracking device is mainly formed by a new hydrogen compressor (1), a heating furnace (2), a protection reactor (3), a pretreatment reactor (4), a first heat high-pressure gas-liquid separation tank (5), a first heat low-pressure gas-liquid separation tank (6), a debutanization tower (7), a main water tube (8), an air-cooled gas tank (9), a first cold high-pressure gas-liquid separation tank (10), a first low low-pressure gas-liquid separation tank (11), a finishing reactor (12), a cracking reactor (13), a second high-pressure gas-liquid separation tank (24), a second low-pressure gas-liquid separation tank (15), an air cooler (16), a circulating hydrogen compressor (17), a second cold high-pressure gas-liquid separation tank (18), a circulating hydrogen compressor inlet liquid separation tank (19), a second cold low-temperature gas-liquid separation tank (20), a fractioning tower (21), a tower top gas tube (22), a light naphtha tube (23), a heavy naphtha tube (24), a kerosene tube (25) and a diesel oil tube (26). The novel coal tar hydrocracking device has the advantages of reasonable and practical design, good denitrification effect, low energy consumption, and great increase of the production efficiency and the economic benefit.

The invention discloses a detection box for domestic drinking water, which comprises a base. The upper side of the support boss is provided with a support boss, and the middle position of the upper side of the support boss is provided with a through groove. A control switch, two groups of lighting lamps are symmetrically distributed on the side of the base close to the control switch, the output terminals of the control switch are respectively electrically connected to the lighting lamps and the input terminals of the water quality detector, through the left box body and the right box body The flip design on both sides of the base can provide convenience for the staff to conduct on-site testing of domestic water. The design of the sample storage tank and waste collection box is reasonable and practical, and the operation is simple, which reduces the work difficulty and labor intensity of the sanitation testing personnel.

The invention belongs to the technical field of sanitary fittings and particularly relates to a novel carpet mop. The problem that design is unreasonable in the prior art is solved. The novel carpet mop comprises a shell internally provided with a storage chamber. A through hole communicated with the storage chamber is formed in the bottom of the shell. A brush located in the through hole is arranged in the storage chamber of the shell. A control rod is connected to the shell. The two ends of the shell are each provided with a wheel capable of rotating relative to the shell, and at least one wheel is fixed to the shell through a detachable connecting structure. The two ends of the brush are connected with the wheels one to one respectively through gear drive structures, and the wheels can rotate to drive the brush to rotate. The novel carpet mop has the advantages of being more reasonable in design and capable of being dismounted and mounted conveniently.

The invention discloses a multifunctional bookbinding device for finance and accounting. The multifunctional bookbinding device for finance and accounting comprises a holder. An FPGA controller is fixedly arranged on the holder. A driving device and a hydraulic device are fixedly arranged on the top of the holder. The bottom of the driving device is fixedly connected with a hole puncher. A pressing plate is fixedly arranged at the bottom of the hydraulic device. A working platform is arranged on the holder, and the working platform is divided into a punching area and a hot melting bookbinding area by a division plate. A through hole is formed in the punching area, a heating block is arranged at the hot melting bookbinding area, and the heating block is in electric connection with the FPGA controller. The multifunctional bookbinding device for finance and accounting is simple in structure and reasonable and practical in design. Documents such as bills and vouchers, used for finance and accounting, can be arranged and then punching and bookbinding are conducted. Hot melting bookbinding also can be conducted. Functionality is various, the office area is saved and office efficiency is also enhanced.

The invention provides a suppression method for voltage fluctuation and flickering of a power grid, and the method has the advantages of reasonable and practical design, convenience in operation and high application effect. According to the technical scheme, a transformer tap is selected to ensure voltage level of an electric device, an on-load voltage regulation transformer is adopted with regard to a newly-built transformer and power distribution transformers additionally arranged at users, a capacitor is set for artificial compensation and comprises parallel compensation and series compensation, a current limitation reactor is additionally arranged at a circuit outlet, the power distribution transformers run in parallel, a high- and low-voltage distribution line scheme with minimum reactance is adopted, a large-scale induction motor with the capacitor is used for compensation, and a power stabilizer is used for voltage stabilization. The suppression method has the advantages of reasonable and practical design, convenience in operation and time saving, the phenomena of frequent supply voltage fluctuation and flickering of the power grid are eliminated, and the power supply quality is improved.

The present invention provides a full set of equipment to make use of a heat processing reduction method to produce regeneration activated carbon, the technical program is as follows: the equipment mainly comprises a raw material pretreatment machine (1), a magnetic separation iron removal machine (2), a raw material crusher (3), a metering feeder (4), a heating furnace (5), an electronic control and temperature control operating console (6), a cleaner (7), a first fan (8), a chimney (9), a first-stage cooler (10), an automatic screening machine (11), a second-stage cooler (12), a finished product packaging machine (13), a dust separator (14), a second fan (15), a third fan (16), a 1# deodorizer (17 ), a fourth fan (18) and a 2# deodorizer (19). The equipment is reasonable and practical in design, safe, environmentally-friendly, efficient and effort-saving, reduces cost, saves resources, enhances the economic efficiency and economic benefits of enterprises, and is suitable for widespread promotion and use.

The invention provides an internal combustion engine power self-propelled lotus root picking machine adopting a compressed air injection and suction type spraying head. According to the technical scheme, the internal combustion engine power self-propelled lotus root picking machine is mainly composed of water spraying frame shoe plates (1), the injection and suction type spraying head (2), an air conveying pipe (3), an air dividing cylinder (4), a main air conveying pipe (5), an air compressor (6), an air compressor coupler (7), an internal combustion engine (8), a speed reducer (9), a gearbox (10), a differential mechanism (11), a triangular belt drive device (12), walking wheels (13), a keel (14), a case (15), a spraying head lifting device (16), a spraying head rack (17), a treading face (18), spokes (19), a water stirring plate (20), connecting devices (21), hubs (22), rubber wheel gear racks (23), an air pipe connector (24), a fixed plate (25), water inlet holes (26), a water-gas mixing chamber (27) and a filter screen (28). The internal combustion engine power self-propelled lotus root picking machine has the advantages of being reasonable and practical in design, high in work efficiency, more attractive in product and suitable for wide application and popularization, saving time and labor, increasing the yield and improving quality.

The invention discloses a head device for a 3D printer. The printer comprises a linear bearing which sleeves a cross optical shaft of the 3D printer and a head carrier which sleeves the linear bearing, the bottom of the head carrier is connected with a motor fixing frame through a connecting column, the motor fixing frame comprises a motor upper bracket and a motor lower bracket on an outer wall of one side of the motor upper bracket, the same motor is fixed on the motor upper bracket and the motor lower bracket, the output shaft of the motor is sleeved with a feeding wheel, the outer wall ofthe motor lower bracket is connected with a driven wheel which meshes with the feeding wheel, the bottom of the motor lower bracket is connected with a hollow throat, the upper outer wall of the hollow throat is provided with heat dissipating blocks which are equidistantly distributed, and the lower portion of the hollow throat is sleeved with a heating block. The device runs more smoothly, can quickly load and unload materials, has smooth silk output, feeds a silk at the proximal end, is beneficial to the withdrawal of the consumables, can reduce the drawing phenomenon, and has better printing effect, the hollow throat is durable, and the heat dissipation performance is good.

The invention provides a safety device for secondary charging battery assembly. The safety device for secondary charging battery assembly has the technical scheme that a positive pole (8) is arranged on the left side of the top end of a shell (7); a negative pole (10) is arranged on the right side of the top end of the shell; a carbonate horizon (6) is horizontally arranged inside the shell; an anti-explosion valve (9) is arranged between the positive pole (8) and the negative pole (10); a positive pole lug (11) is arranged under the positive pole (8); a negative pole lug (12) is arranged under the negative pole (10); a first battery cell (1), a second battery cell (2), a third battery cell (3), a fourth battery cell (4) and a fifth battery cell (5) are respectively and longitudinally arrayed in the shell (7). The safety device for secondary charging battery assembly is reasonable and practical in design, cannot cause fire or combustion when needling and extruding are carried out according to QC743-2006 forcible inspection standard, is safe and environmental-friendly, is beneficial to improving efficiency and saving energy, and is suitable to be popularized and used widely.

The invention provides a novel hose clamp which is simple in structure and good in use effect. The technical scheme includes that the novel hose clamp is characterized in that a handle (2) is arranged at the top of a clamp body (1) and is fixedly connected with a screw rod (3), the screw rod (3) is connected with a push block (5) via a square screw fixing block (4), a groove-rotatable device (6) is arranged on the lower portion of the push block (5) and is connected with a pressure steel sheet (7), a fixed point (8) is arranged between the push block (5) and the pressure steel sheet (7), and an outer ring device (9) is arranged on the lower portion of the clamp body (1). The novel hose clamp is reasonable and practical in design, strong in intensity, even in stress, tight in sealing, less prone to damaging rubber pipelines, long in service life, time-saving, labor-saving and suitable for wide popularization and use, maintenance time is shortened, working efficiency is improved, and valuable energies are saved.

The invention discloses an auxiliary stirring transmission connection device for a mixing and stirring tank. The auxiliary stirring transmission connection device comprises a main stirring shaft in a vertical direction and an auxiliary stirrer shaft in a horizontal direction, wherein a bevel gear wheel II is fixedly connected to the main stirring shaft; a bevel gear wheel I is fixedly connected to one end of the auxiliary stirrer shaft; and the bevel gear wheel II and the bevel gear wheel I are meshed, so that the axial rotation of the main stirring shaft drives the axial rotation of the auxiliary stirrer shaft in the horizontal direction. According to the device, transverse auxiliary stirring linkage at the intersection of main stirring and auxiliary stirring is realized by virtue of the bevel gear wheels, auxiliary stirring of the mixing and stirring tank is realized without a driving motor, and the auxiliary stirring transmission connection device is simple in structure and reasonable and practical in design.