395results about How to "Reasonable and reliable structural design" patented technology

The invention particularly relates to an urban underground round rainwater pipeline dredging device, solving the problem that cleaning of the existing rainwater pipeline wastes time and labor, and harms the bodies of constructors. The urban underground round rainwater pipeline dredging device is characterized in that flexible landing legs are arranged at the lower side of a rack, the upper end face of the rack is provided with a guiding slideway which is provided with a sliding trolley, hollow rotating shafts which are connected into a whole penetrate through the sliding trolley, the tail part of the connected hollow rotating shaft is provided with a high-pressure water supply pipe, a speed reducer and a motor are arranged on the sliding trolley, the middle part of the connected hollow rotating shaft is provided with a supporting disc, the circumferential surface of the supporting disc is provided with plastic idler wheels, the front end of the connected hollow rotating shaft is provided with a smashing device or a cleaning device, the side wall of the connected hollow rotating shaft is provided with a plurality of high pressure spraying heads, the smashing device comprises a smashing disc, the circumferential surface of the smashing disc is provided with plastic idler wheels I, the front end of the smashing disc is fixedly provided with smashing teeth, the cleaning device comprises a cleaning disc, and the circumferential surface of the cleaning disc is provided with plastic idler wheels II and cleaning hair brushes. The structure of the urban underground round rainwater pipeline dredging device has the advantages of simple structure, convenient operation and low cost.

The invention relates to the field of machining, in particular to a gear press-mounting fixture having a tooth space central position requirement. The gear press-mounting fixture solves the problem that assembly type gears are complex in press-mounting. The gear press-mounting fixture comprises a base, the base is fixed on a machine tool, a first elastic stretchy positioning rod which is symmetrical with the axis of the base is arranged on the lower portion of the outer circumferential face of the base, a second elastic stretchy positioning rod which is symmetrical with the axis of the base is arranged on the upper portion of the outer circumferential face of the base, a guide mandrel is arranged on the axis of the base, a pressure head which is located above the base is sleeved on the guide mandrel, the front end of the first elastic stretchy positioning rod is a tapered round head, and the front end of the second elastic stretchy positioning rod is a duckbilled structure. The gear press-mounting fixture is reasonable and reliable in structure and design, gears can be mounted in a pressing mode accurately, requirements for angles of tooth spaces are guaranteed, machining difficulty is lowered, input cost is low, and good economical benefits are obtained. Further, the gear press-mounting fixture has the advantages of being simple in structure, good in manufacturability, reliable, stable, and convenient and fast in operation.

The invention particularly relates to a machine loader, which is used for solving the problems that the prior loaders can not freely load or unload at any time within the megawatt range after the motor starts and ensure stable load. The machine loader comprises a speed reducer, wherein the speed reducer is provided with a first output shaft and a second output shaft which are respectively connected with the shaft and gear of a loading gearbox; the input shaft of the speed reducer is provided with a motor and connected with a motor shaft; and the motor is provided with a power supply system and a power failure brake. The machine loader of the invention has reasonable and reliable structural design, can load with kilowatts of power without machines, and is not limited to the stroke in the loading process. All the clearances generated in the connecting links in the closed system, especially the tooth side clearances at all levels when the tested speed reducer is in multistage transmission can be eliminated, thereby ensuring smooth loading in one installation. The machine loader of the invention has the advantages of sensitive and stable loading, and the like, and is especially suitable for high-power mechanical closed test beds.

The invention provides a wafer adsorption mechanism, wherein an adjusting bottom board is arranged between a mounting disk and a basal disc, wherein, edges of the bottom of the adjusting bottom board are symmetrically distributed with raised grooves, side edges of the adjusting bottom board are evenly provided with fastening screws, the center of the adjusting bottom is provided with a centre bore of the adjusting bottom board, a long air duct and a short air duct which are crossed at the centre bore of the adjusting bottom board, wherein, the upper wall of a screw hole of the long air duct is provided with a larger annular adjusting hole, the upper wall of a screw hole of the short air duct is provided with a middle annular adjusting hole; the large annular adjusting hole fitly connected with a short adjusting screw nut and a short adjusting component, the middle annular adjusting hole is fitly connected with a long adjusting screw nut and a long adjusting component, screw outer rings of the long adjusting component and the short adjusting component are provided with pistons and seal rings. The basal disc is made of porous ceramic materials, wherein, the internal bottom surface of the basal disc is provided with a centre hole of the basal disc, a concentric ring air duct groove, a large ring compress hole, an inter-ring air duct and a middle ring compress hole, the outer ring of the internal bottom surface of the basal disc is pasted with a large vacuum ring, and the middle ring of the internal bottom surface of the basal disc is pasted with a middle vacuum ring, and the center of the internal bottom surface of the basal disc is pasted with a small vacuum disk, and the install disk and the adjusting bottom board are tightly connected. The mechanism can adsorb 3 to 8 wafers only through simple adjustment.

The invention particularly provides an outburst prevention track drilling machine for laneway excavation, and solves the problems that during the use of a conventional gas drainage drilling machine, the moving is difficult, and construction requirements of different heights and different angles cannot be met. The outburst prevention track drilling machine comprises a machine body platform and a lifting platform in front of the machine body platform, wherein a travelling mechanism is arranged under the machine body platform; a control mechanism, a mud pump, a hydraulic mechanism and a hydraulic system are arranged on the machine body platform; a fixing seat is arranged at the front end of the machine body platform; a lifting mechanism connected with the fixing seat and the lifting platform is arranged therebetween; and a support mechanism is arranged at the rear end of the machine body platform. According to the requirements of different heights of laneway engineering holes, the mechanized construction of underground excavation detecting holes, large caliber gas drainage holes and other engineering holes of the heights ranging from 1 to 3 m is realized through the lifting of the lifting platform, the drilling function is comprehensive, work security and efficiency are high, workers' labor intensity is low, the structure is reasonable, the mechanism is compact, and the operation is flexible and convenient.

The invention provides a mining tunnel deformation monitoring device, solving the problems that the conventional tunnel monitoring is bad in monitoring effect, inconvenient to observe the construction, and complex in installation. A wire rope is arranged between two basic points, a lower fixing seat is provided with two vertically distributed telescoping rods, left and right spiral rods are arranged between the two telescoping rods, a spring sleeve is arranged above the upper telescoping rod, a telescoping spring is arranged in the spring sleeve, the upper end of the spring sleeve is provided with a spring precompressed cap, the lower end of the upper fixing seat is provided with vertically distributed lengthening extension rods and a scale rod having the lower end tightly attached to the telescoping spring, the lengthening extension rods are in threaded connection with the scale rod via an upper connecting sleeve, and the spring sleeve is provided with a scale pointer and a level pointing to the scale rod. The mining tunnel deformation monitoring device is suitable for measuring the deformation amount of tunnels in different heights, is visual and convenient for observation and recording, and meanwhile, the construction boring is not needed, the installation is convenient, the on-site construction progress is not influenced, and the repeated use can be guaranteed.

The invention relates to an initiative top coal caving crushing hydraulic support, which solves the problems that the existing top coal caving hydraulic support is poor in top coal caving crushing effect and influences the yield of top coal. The initiative top coal caving crushing hydraulic support comprises a base and a top beam, wherein an inner top beam is embedded in the middle part of the top beam, inner telescopic stand columns which are hinged with the inner top beam and the base are arranged between the inner top beam and the base, outer telescopic stand columns which are hinged with the top beam and the base are arranged between the top beam and the base at the outer side of the inner top beam, an impact vibration platform is arranged at the upper end of each inner top beam, an inner coal breaking plate is arranged at the upper end of the impact vibration platform, and outer coal breaking plates are respectively arranged on the upper end surface of the top beam at the left side and the right side of the impact vibration platform. By adopting the initiative top coal caving crushing hydraulic support, a coal caving arch structure is destroyed, and the efficiency for crushing the top coal is improved; moreover, the top coal can be crushed into loosened coal sheets and can be effectively discharged from a coal caving opening; and the lifting frequency of the inner and outer telescopic stand columns and the movement frequency of the inner top beam and the coal breaking plates are controlled by virtue of an overflow valve. The initiative top coal caving crushing hydraulic support has the advantages of simple structure, convenient operation and low cost.

The invention discloses a tilling seeding and fertilizing multifunctional compound operation seeding machine which comprises a fertilizing and seeding part and a rotary tilling part. The rotary tilling part is connected with the fertilizing and seeding part through a pull rod and a pin. An output shaft of a gearbox provides power to the rotary tilling part. At the seeding part, a press wheel shaft provides power to a fine point seeder shaft and a fertilizing seeder shaft. Both a fine point seeder assembly and a fertilizing seeder assembly are connected with a vibration reduction floating opener by pipelines. By the tilling seeding and fertilizing multifunctional compound operation seeding machine, the problems that a certain part of the traditional tilling seeding machine cannot be combined to be used as required, seeding and fertilization cannot be conveniently transformed and a plurality of processes cannot be completed in one step are solved. The rotary tilling part and the seedingpart are simple to disassemble. The combination application of the rotary tilling part and the seeding part can be easily realized. The tilling seeding and fertilizing multifunctional compound operation seeding machine is easy to seed and fertilize. The using requirement of a user is really met.

The invention discloses an air preheater comprising an air heater main body. The air heater main body is internally provided with a heat exchanger tube and is provided with a water inlet on the side wall, wherein the water inlet corresponds to the lower part of the heat exchanger tube and is connected with a pulse flushing device. A carbon black production process of the air preheater comprises an air preheater cleaning step comprising the following steps: enabling the pulse flushing device to flash water to the water inlet of the air preheater; enabling carbon black smoke to enter the lower part of the air preheater for pulse flushing; and momentarily atomizing the water entering the air preheater and rapidly increasing the size so that the carbon black smoke in the heat exchanger tube abruptly changes, has a pulse jitter effect and shakes carbon black powder remained on the inner wall of the heat exchanger tube to enter the next link along with the carbon black smoke. Accordingly, the carbon black powder in the carbon black smoke can not generate an attaching layer on the inner wall of the heat exchanger tube to keep the favorable heat-exchanging effect of the heat exchanger tube.

The invention discloses a variable pressing head dynamic pressing test device based on a Hopkinson pressing rod system, which can realize in-situ test of the dynamic mechanical property of a material.A structure of the pressing device is: a pressing head is in seamless joggle joint with a pressing head supporting object made of a material the same as that of the pressing head; the tail end of thepressing head supporting object and an incident rod end coaxially through a screw rod; a cushion block made of a material the same as that of the incident rod is placed between the tail end of the pressing head supporting object and the incident rod end; the material of each section of the screw rod which is screwed into the cushion block / incident rod and the pressing head supporting object is the same as that of the supporting object; in addition, the tail end of the pressing supporting object adheres to the cushion block as well as the interface of the cushion block and the incident rod end; the pressing head supporting object and the end part of the incident rod are in sleeving connection through a polytetrafluoroethylene sleeve; the variable pressing head dynamic pressing test devicebased on the Hopkinson pressing rod system can realize dynamic pressing test based on the traditional Hopkinson pressing rod device, and is reasonable and reliable in structural design, the pressing head is convenient to disassemble, assemble and replace, and the accuracy of the dynamic pressing test is guaranteed under the condition of meeting wave impedance matching, so that a dynamic mechanicalproperty test method of the material is enriched.

The invention specifically relates to a flying probe tester utilizing a planar motor and solves the problem of an existing flying probe tester that the testing precision cannot be satisfied due to an unreasonable structure. A machine frame is internally provided with a planar motor stator, a probe loading device, a circuit board positioning clamp and a lifting platform. The lifting platform is provided with a fixed probe. The probe loading device comprises a rotor body. The rotor body is provided with a support. A linear motor and a transmission belt are fixed at two sides of the support. The transmission belt is provided with an insulating block. A probe assembly is arranged on the lower end of the insulating block. The probe assembly comprises a sleeve. A probe penetrates through the sleeve. A buffering spring, in contact with the insulating block, sleeves the tail end of the probe. The probe is composed of a probe body and a probe sleeve, and a probe buffering spring is arranged between the probe sleeve and the probe body. According to the invention, the planar motor is adopted for realizing specific angle loading, an elastic contact circuit board, a programmable-control loading pressure, good conductivity, voltage resistance and insulation.

The invention discloses a variable-pressure gas release braking method. The variable-pressure gas release braking method includes that a first cavity, a second cavity and a third cavity are sequentially arranged on a brake shell; an electromagnetic valve is fixed into the first cavity, a slider is arranged in the second cavity, the second cavity is sealed by a plug, the plug is connected with the slider by a second spring, and a second steel ball is arranged between the slider and an oil drain passage; a piston is arranged in the third cavity; medium oil and the second spring jointly push the slider when the electromagnetic valve is powered on, the oil drain passage is sealed by the second steel ball, the medium oil pushes the piston to move downwardly, the pressure of the medium oil in a piston cavity rises when an exhaust valve of an engine is stopped from resetting by the bottom of the piston, the medium oil and a first spring jointly act to push a first steel ball to move downwardly, an oil inlet hole of the piston is sealed, the medium oil in the piston cavity is turned into high-pressure oil, and the piston is stopped from moving upwardly, so that the exhaust valve is opened in an ejected manner, and the purpose of braking the engine is achieved. The invention further discloses a variable-pressure gas release brake.

The invention particularly relates to a magnetic attracting device for iron scraps in a long-deep hole. The problems that in the existing cleaning process of iron scraps in a long-deep hole of a workpiece, unsafe factors and environmental pollution exist, time and labor are wasted, and the cleaning effect is poor are solved. The magnetic attracting device comprises a ladder-shaped sleeve, and a ladder-shaped compression rod is arranged in the ladder-shaped sleeve in a penetrating mode, wherein the diameter of the right end of the ladder-shaped compression rod is larger than that of the left portion; a handle rod perpendicular to the ladder-shaped sleeve is fixedly arranged at the right end of ladder-shaped sleeve, a reset spring which is arranged on the ladder-shaped compression rod in a sleeving mode is arranged between the right end face of the ladder-shaped sleeve and the ladder face of the ladder-shaped compression rod, a ladder-shaped magnetism isolating fixing sleeve is connected to the left end of the ladder-shaped compression rod in a threaded mode, the ladder face of the magnetism isolating fixing sleeve is flush with that of the ladder-shaped sleeve, and a permanent magnet is buckled in the magnetism isolating fixing sleeve. According to the magnetic attracting device for the iron scraps in the long-deep hole, convenient and rapid cleaning of the iron scraps is achieved, and the cleaning effect is effectively guaranteed; meanwhile, one-hand operation can be achieved, time and labor are saved, the operation efficiency is improved, and the magnetic attracting device for the iron scraps in the long-deep hole has the advantages that the structure is simple, machining is convenient, and the cost is low.

The invention particularly relates to a combined supporting structure for transverse shock resistance of a three-span bridge and aims to solve the problem that an existing bridge supporting structureis poor in transverse shock resistance is solved. According to the combined supporting structure for the transverse shock resistance of the three-span bridge, two limiting blocking tables are integrally arranged on the edge of the upper surface of a bent cap; a bearing table is horizontally arranged between the two limiting stop tables; a plurality of sliding grooves are formed in the bent cap; aplurality of sliding seats are arranged on the lower surface of the bearing table; a plurality of hydraulic dampers are connected between the bearing table and the two limiting blocking tables; a plurality of limiting columns are connected between two connecting lugs; pier caps sleeve the limiting columns in a sliding mode; two upper connecting frames are fixedly connected to the two connecting lugs; and two shock absorbers are horizontally connected to the bottoms of the two upper connecting frames respectively. Through the multiple-transverse shock absorption supporting system, the transverse shock absorption effect of the bridge is effectively improved, and transverse buffer protection effects on structures such as a bridge body and bridge piers are improved.

The invention specifically discloses a hydraulic self-propelled cotton field high-gap pesticide spray vehicle, which solves the problems of time and labor waste and poor pesticide spray effect existing in the conventional pesticide spray using a handheld spray rod. A front driving wheel and a rear steering wheel are arranged below a rack; a hydraulic oil pump, a diesel engine, a triple pump and a pesticide solution box are arranged above the rack; output ends of the hydraulic oil pump, the diesel engine and the triple pump are correspondingly connected with a belt pulley I, a belt pulley II and a belt pulley III; a hydraulic distributor, an operating rod, a steering gear box and a hydraulic oil tank are arranged around the hydraulic oil pump; a hydraulic motor is arranged below the front side of the bracket; a steering oil cylinder is arranged on the rear side of the rack; pesticide spray arms are arranged in the lower space around the rack and are fixedly provided with a plurality of spray heads; the hydraulic oil pump and the hydraulic distributor are communicated with the hydraulic motor in sequence; the hydraulic oil pump, the steering gear box and the steering oil cylinder are communicated in sequence; the triple pump is communicated with the pesticide solution box; and a pesticide outlet pipe of the triple pump is communicated with the spray heads. The hydraulic self-propelled cotton field high-gap pesticide spray vehicle has the advantages of simple and compact structure, convenience in operation and low cost.

The invention discloses a gas pumping and releasing pipeline explosion suppression fire retarding device which solves the problems that an existing gas pumping and releasing pipeline has great potential safety dangers. An explosion suppression system comprises a controller, a flame detector and a fire extinguisher. The output end of the flame detector is connected with the input end of the controller. The output end of the controller is connected with the input end of the fire extinguisher. A fire retarding system comprises a shell body and a metal mesh located in the shell body. An explosion venting plate is arranged at the top of the shell body. A gas inlet pipe and a gas outlet pipe are respectively arranged on the left side wall and the right side wall of the shell body. Sealing water drowning the bottom of the gas inlet pipe is arranged at the bottom of the shell body. The shell body on the outer side of the sealing water is provided with a water level sensor and a water level indicator. The water level sensor and the water level indicator are communicated with the sealing water. The gas pumping and releasing pipeline explosion suppression fire retarding device effectively restrict gas explosion of a pumping and releasing pipeline, eradicates occurrence of chain explosion of a pumping and releasing pipe network, is high in fire retarding performance, and has the advantages of being simple in structure, convenient to operate, and low in cost. Moreover, the suppression process is high in speed and effective.

The invention particularly relates to a hot-press tooth-aligning clamp for a toothed shaft part and a gear, in order to solve the problems that the positioning is not accurate enough, the clamping force is insufficient and the operation is troublesome during installation of the existing hot-press tooth-aligning clamp for the toothed shaft part and the gear. The hot-press tooth-aligning clamp comprises a base, wherein the base is provided with a counter bore; a positioning sleeve is sleeved at the bottom of the counter bore; a guide shaft I penetrates through the side wall of the base; a step-shaped positioning pin I penetrates through the guide sleeve I; the large-diameter side of the positioning pin I is matched with the inner wall of the guide sleeve I; a spring I is sleeved at the small-diameter side of the positioning pin I; a support plate is fixed at the upper end of the base; a guide sleeve II penetrates through the side wall of the support plate; the position tolerance in the up-down direction of the center lines of the guide sleeve II and the guide sleeve I is smaller than or equal to 0.02mm; a step-shaped positioning pin II penetrates through the guide sleeve II; the large-diameter side of the positioning pin II is matched with the inner wall of the guide sleeve II; and a spring II is sleeved at the small-diameter side of the positioning pin II. The universality is improved, the accuracy and the stability of tooth alignment are ensured, and the hot-press tooth-aligning clamp has the advantages of simple structure and convenience in processing when the operation troublesome extent is reduced.

The invention discloses a damping device capable of offsetting floor slab disturbance caused by pump tube impacting. The existing problem that a floor slab is impacted resulting in the existent of easy fatigue and damage of floor slab concrete when concrete pouring is conducted on walls, beams, slabs and columns is solved. The damping device comprises a rectangular vertical steel plate framework penetrating through a floor slab hole, a horizontal steel plate framework is fixed on the outer side wall of the rectangular vertical steel plate framework, an expansion bolt connected with the floor slab penetrates through the horizontal steel plate framework, vertical connecting plates corresponding to the side walls of the rectangular vertical steel plate framework one by one are arranged on theinner sides of the rectangular vertical steel plate framework, the part between each vertical connecting plate and the corresponding inner wall of the rectangular vertical steel plate framework is provided with a damping spring which is connected with the vertical connecting plate and the corresponding inner wall of the rectangular vertical steel plate framework, and rollers are arranged on the inner sides of the vertical connecting plates. By means of the damping device, the disturbance in the horizontal and vertical directions of the floor slab caused by the impacting force of a pump tube when the pump tube penetrates through the floor slab is greatly relieved, the damping effect is greatly improved, the problems of fatigue and damage of a middle layer floor slab are prevented, and theconstruction quality of floor slab concrete is ensured.

The invention discloses a safe and reliable anti-theft door. The safe and reliable anti-theft door comprises an anti-theft door body and a lock installed on the anti-theft door body. The middle of the anti-theft door body is provided with a door in door opening. Guide grooves are formed in the left side and the right side of the door in door opening. The lower ends of the guide grooves extend to the lower portion of the anti-theft door body. A supporting plate which can slide up and down is arranged between the guide grooves in the left side and the right side. The lock is located in the position, on the left side of the door in door opening, of the anti-theft door body and comprises an outdoor panel, a controller, a poking motor, a clutch mechanism, a transmission gear and a locking mechanism. According to the safe and reliable anti-theft door, the structure design is reasonable and reliable; a door in door is conveniently and rapidly opened and closed, the time and effort are saved, and the safety performance of the anti-theft door is ensured at the same time; and in addition, a piece of single lens reflex glass is arranged on the outdoor panel and internally provided with a camera, the camera in the single lens reflex glass cannot be seen from the outside of a room, a video evidence of a thief during unlocking can be collected through the camera, and the case can be rapidly solved.

The invention provides a three-station mechanism integrating manual operation and electric operation and with a breaking trip. The three-station mechanism comprises a rack, wherein an isolation transmission device, an isolation output device, a grounding transmission device, a grounding output device, an energy storage device, an electric driving device and a breaking trip device are arranged on the rack, the breaking trip device is linked with the isolation transmission device, the isolation transmission device drives the energy storage device to store energy, the stored energy is released todrive the isolation transmission device to continue to rotate and output a closing torque when the energy storage device rotates by maximum energy storage position, the breaking trip device rotates and the energy is stored, the isolation output device can be driven to reversely rotate by the isolation transmission device to achieve isolation operation after an energy storage state of the breakingtrip device is relieved, the grounding transmission device rotates and drives the energy storage device to store the energy, and the stored energy is relieved to drive the grounding transmission device to continue to rotate and output a grounding torque when the energy storage device rotates by the maximum energy storage position. The three-station mechanism is reasonable and reliable in structural design, is high in stability and long in service lifetime.

The invention discloses a brake device of track conveying equipment. An oil cylinder is installed on a supporting frame. A lower push rod and an upper push rod are installed on two sides of the oil cylinder respectively. A guide rod frame is installed on the upper side of the oil cylinder. A spring push plate is installed on the upper push rod, and a spring is installed between the spring push plate and the guide rod frame. A press plate is installed at one end of the lower push rod. A brake rod is installed on the lower side of the press plate. A connecting rod is installed on the upper side of the press plate, and the other end of the connecting rod is connected with a rotary brake claw. The rotary brake claw is installed on the supporting frame through a rotary shaft of the rotary brake claw. The brake device of the track conveying equipment has the technical benefits that 1, the top surface and two lateral surfaces of a track can be braked simultaneously, the brake speed is high, and the brake effect is good; the rotary brake claw can hook the track, prevent a track conveying brake vehicle from disengaging from the track and prevent the brake vehicle from overturning; 2, the brake vehicle is not affected when passing through a track turnout; 3, the brake device is convenient to install and maintain.

The invention in particular relates a whole pulling and moving type whole-process unloading belt conveyor for coal mine underground filling, solving the problem that the existing belt conveyors can not realize whole pulling and moving and whole-process unloading due to structure defects. The belt conveyor is characterized in that the axes of rollers at the upper side of a rack are on the same plane; sliding bases are arranged below the rack and supports are fixed between the rack and the sliding bases; a plurality of unloading plates which are vertically placed and form angles with the left and right directions of conveyor belts are arranged above the conveyor belts; guide seats corresponding to the unloading plates are fixed at the left and right ends of the rack; and lift cylinders are fixed between the guide seats and the lower ends of the corresponding unloading plates. The belt conveyor is reasonable and reliable in structure design, not only realizes whole pulling and moving but also meets the requirement for whole-process unloading and has the advantages of low cost and high practicability.

The invention discloses a high-speed multifunctional precise-amount seed-metering device, which solves the problem that the seed fetching performance is poor, seeds cannot be accurately sowed and sowing seed type is limited when the traditional seed-metering device sows at a high speed. A driving gear, a slanting slideway disc and an annular seed discharging impeller are sequentially fixed from the back to the front on a rotary shaft; a flow dividing disc is arranged behind the slanting slideway disc; a vacuum chamber seat is fixed behind the flow dividing disc; a plurality of radial slotted holes are uniformly distributed on the edge of the slanting slideway disc; the flow dividing disc is provided with a parabolic slotted hole communicated with the radial slotted holes; a speed accelerating wheel eccentric with the seed discharging impeller is arranged in the centre of the seed discharging impeller; a seed discharging port and a rotation speed sensor which swing left and right are respectively arranged on the lower part of a seed discharging shell and on the inner wall of the seed discharging shell corresponding to the seed discharging impeller; a photoelectric sensor used for detecting seed loss is arranged on the inner wall of a front end cover; and a hall sensor used for detecting the seed quality is arranged on the seed discharging port. The high-speed multifunctional precise-amount seed-metering device has a reasonable and reliable structural design, guarantees the seed absorption performance of the slanting slideway disc and meets the requirements on precise amount and precise sowing.

The invention relates to large cross-section coiling steel uncoiling equipment, solving the problem that the rough straightening can not be carried out on large cross-section coiling steel because no large cross-section coiling steel uncoiling equipment exists at present. The rear wall of a stand is articulated with a press plate and fixed with a support seat; the upper part of the support seat is articulated with a support plate; a first oil cylinder articulated with the press plate and a machine base is arranged between the press plate and the rear wall of the machine base, and a second oil cylinder is fixed on the press plate; the end part of the second oil cylinder is provided with a pinch roller; the rear part of the press plate is provided with a press roll; the press roll is provided with a rotary driving mechanism; a third oil cylinder articulated with the support plate and the support seat is arranged between the support plate and the lower part of the support seat; and a shovelling plate lower than the axle center of a sleeve in height is placed on the machine base. The invention has reasonable and reliable structure design, not only enhances the power of the head straightening of the large cross-section coiling steel, but also plays a role of pinching coiled bar steels, realizes the uncoiling and the integral straightening of the large cross-section coiling steel and has the advantages of reasonable structure, convenient operation and lower cost.

The invention provides a manganese ferroalloy finery vehicle type folding smoke helmet, solving the problems of operation environment influenced smoke and air pollution caused by smoke during tapping or deslagging of manganese ferroalloy finery and comprising a telescopic platform. The left and right sides of a front smoke helmet plate and a rear smoke helmet plate are provided with travelling wheels, the front end and the rear end of a rear guide rail are respectively provided with a locating part, the traveling wheel of the front smoke helmet plate is provided with a power-driven mechanism,the front smoke helmet plate around a smoke inlet is fixed with a smoke collecting hood, and a butt plate is arranged above the smoke collecting hood, is provided with a long hole and is fixed with abutt hood. The smoke helmet in the invention has reasonable and reliable structure and high smoke collecting effect, reduces the processed air quantity, is firm in use and stable in movement, can be used as an operating platform for some operations such as smelting, tapping and the like, has low cost, and is especially suitable for a finery in pit-type arrangement.

The invention particularly relates to an air distribution controller for a tunnel construction air duct, aiming at solving the problems that the ventilation time is prolonged, the energy consumption is wasted, and the work period is delayed since the air quantity required for working faces on two sides of the conventional tunnel construction air duct can not be reasonably distributed. The bottom of a three-way joint is provided with a cylindrical groove, the groove is internally provided with an air distribution cylinder, the side wall of the air distribution cylinder is provided with four air outlets which consist of a small air outlet and a large air outlet, which are arranged front and back, and two medium air outlets which are arranged left and right, a rotating shaft is fixed at the center of the bottom of the air distribution cylinder, a guide pipe which is fixed under the bottom of the groove is sleeved on the rotating shaft, a control handle which rotates around the rotating shaft up and down is connected under the rotating shaft, and four control handle fixing clamp rings which are evenly arranged along with the axes of the groove and correspond to the positions of the air outlets are fixed under the bottom of the groove. The controller is reasonable and reliable in structure design, and has the advantages of being economical, reasonable and energy-saving, so that some equipment purchasing cost and the daily energy consumption cost can be saved.

The invention specifically provides a safety-increasing explosion-proof type variable-frequency adjustable-speed asynchronous motor for a petroleum drilling winch, and solves the problems of bad ventilation and heat radiation effects, high possibility of causing electric corrosion phenomenon, and impossibility of satisfying load requirements of high power and wide constant-power scopes of users in the existing electric motors. A draught fan is arranged above a full-steel-plate horizontal type engine base; a rain shielding device is arranged on the front side of the draught fan; an inward-concave type insulation front cover plate and a back cover plate are arranged at the two ends of the full-steel-plate horizontal type engine base; the insulation front end cover is provided with an NJ+HJ326ECM / C4 VA301 bearing, a front bearing cover and a front sealing ring; the back end cover is provided with an NU236 ECM / C4 bearing, a back bearing cover and a back sealing ring; a waist-shaped air outlet is formed in the back end cover; an air outlet housing is arranged in the waist-shaped air outlet; the material of a conducting bar of a rotor is pure copper T2; a conducting bar and an end bar of the rotor are in induction welding; the rotor punching material is 50WW470; and the stator punching material is cold rolling 50TW470.

The invention particularly relates to a secondary lining split mounting type blocking head device for a metro underground excavation tunnel, which resolves the problems that due to an unreasonable structure of an existing secondary lining blocking head device, reinforced steel bar at construction joints is prone to be broken and waterproof materials cannot be installed in the right positions. The secondary lining split mounting type blocking head device comprises an arc blocking head steel plate which is formed of a plurality of steel plate base bodies, wherein a longitudinal reinforced steel bar clamp groove is arranged at the outer arc edge of each steel plate base body, a key groove shaped bolt hole is arranged on one side of the inner arc of each steel plate base body, a bolt is screwed in the bolt hole, the inner side of the blocking head base body is provided with an arc reinforced steel bar fixed with the section of a secondary lining trolley, radially arranged reinforced sleeves are evenly distributed and fixed on the reinforced steel bar, reinforced steel tubes are arranged in the reinforced sleeves, wood wedges are plugged between the reinforced steel tubes and the blocking head steel plates, and a galvanized water stopping steel plate is welded on an outer arc end face of the blocking head steel plate in point mode. The secondary lining split mounting type blocking head device is reasonable in structural design, can buffer force deformation, is supported and fixed by the reinforced steel tubes, is good in waterproof effect, and has the advantages of being simple in process, convenient in operation and capable of saving cost.

The invention specifically discloses a slip ring structure for a double-fed motor coiling type rotor, for solving the problems of increased fault points, difficult control of assembling precision and enhanced operation difficulties by use of a conventional motor slip ring installation cooler and an encoder. The right end surface of a slip ring main body is connected with a cooling fan, an annular wheel hub is internally provided with a plurality of pairs of conductive poles which are fixed to the right end surface of the slip ring main body and are uniformly arranged by taking the axle center of the slip ring main body as a circle center, each pair of conductive poles are sleeved by a T-shaped conducting block, the inner sides of the T-shaped conducting blocks are provided with wiring holes, the inner sides of the conductive poles are provided with an encoder support connected with the right end surface of the slip ring main body, the encoder support comprises two discs arranged in parallel and an insulation spacer disposed between the two discs for separating the T-shaped conducting blocks, and the center of the disc at the right side of the encoder support is provided with an encoder connection shaft. By using the slip ring structure for the double-fed motor coiling type rotor, the heat dissipation problem of a slip ring is solved, the axial dimension is reduced, and the connection reliability and the operation manufacturability are guaranteed.

The invention provides a stope face parallel dual-U-type roadway, and aims to solve the problems that since stope face roadway arrangement is unreasonable, upper corner gas is difficult to control, control is uncompleted, and multiple roadway arrangement stope efficiency is low. The stope face parallel dual-U-type roadway comprises a track roadway, an equipment roadway, an air return roadway, an auxiliary air return roadway and an auxiliary air inlet roadway. The track roadway and the equipment roadway are located above a stope face, the air return roadway, the auxiliary air return roadway and the auxiliary air inlet roadway are located below the stope face, the right ends of the track roadway, the equipment roadway and the air return roadway are provided with an open-off cut roadway communicated with the track roadway, the equipment roadway and the air return roadway, the right ends of the auxiliary air return roadway and the auxiliary air inlet roadway are communicated, a plurality of ventilate connected roadways are arranged between the auxiliary air return roadway and the auxiliary air inlet roadway at intervals, and gas drainage pipes communicated with a goaf. The stope face parallel dual-U-type roadway has the advantages of green energy, conservation of resources and effective increase of recovery rate.