110results about How to "Avoid homework" patented technology

The invention relates to the shipbuilding field, and particularly discloses a method for assembling a corrugated bulkhead block. The method comprises the following steps: hoisting a deck subsection to an overturning area, and making the reverse side thereof face upward; hoisting the corrugated bulkhead subsection to the deck subsection, and fixedly connecting the corrugated bulkhead subsection on the reverse side of the deck subsection to form the corrugated bulkhead block; and overturning the corrugated bulkhead block and hoisting the corrugated bulkhead block to a dock / shipbuilding platform. According to the method, the assembly of the corrugated bulkhead block is completed at the overturning area, and then the corrugated bulkhead block is hoisted to the dock / shipbuilding platform. The method has the advantages that a large quantity of hoisting and welding work is completed at the overturning area, so that the operation in a closed compartment is avoided, and the safety factor of the operation is improved; horizontal overhead position welding is transformed into flat fillet welding in the assembling process, so that the welding quality is improved; and the times of repeatedly hoisting the corrugated bulkhead subsection and the deck subsection to the dock / shipbuilding platform are reduced, thereby being favorable for assembling the corrugated bulkhead block quickly, and shortening the manufacturing cycle of the dock / shipbuilding platform.

The invention belongs to the technical field of oil drilling, and relates to a double-throttle control slurry pump distributing manifold for applying wellhead back pressure and a method. The double-throttle control slurry pump distributing manifold for applying the wellhead back pressure comprises a main pipe, a manifold four-way joint, a first distributing pipeline, a second distributing pipeline and a third distributing pipeline; the manifold four-way joint is respectively connected with the main pipe, the first distributing pipeline, the second distributing pipeline and the third distributing pipeline; a pressure gauge is installed on the main pipe; and the first distributing pipeline is provided with a first stop valve and a first throttling valve, the second distributing pipeline is provided with a second stop valve and a second throttling valve, and the third distributing pipe is provided with a third stop valve. The pump is unnecessary to stop and start in the connecting process, the pulling out process and the drilling down process, so that the pressure fluctuation on the bottom of a well can be reduced, and the control capacity for the bottom pressure can be improved; a back pressure pump is not needed, so that additional work caused by the back pressure pump is avoided, the nonproduction time can be reduced, and the drilling cost can be reduced; the pollution caused by the leakage of the back pressure pump can be avoided; and the energy and the floor area can be saved.

The object of the invention is to diminish the breakage of a back sheet caused by the application / stripping of a fixing tape. A back sheet (12) obtained by superposing a hydrophobic sheet (12A) made of a hydrophobic resin and nonwoven fabric sheets (12B and 12C) and press-bonding the sheets is used. In forming the sheet (12), the hydrophobic sheet (12A) and the nonwoven fabric sheets (12B and 12C) are superposed together with a hot-melt adhesive interposed between these, and the sheets are then press-bonded with heating. The bond strength between the hydrophobic sheet (12A) and the nonwoven fabric sheets (12B and 12C) is higher than the peel strength between the nonwoven fabric sheets (12B and 12C) and the male material (Y) applied thereto. The sheet (12) has a value determined by a KES flexural test of 0.05-0.50 gm<2> / cm.

The invention provides a narrow-fuselage six-arm fully hydraulic anchor rod anchor cable drill carriage which is composed of a walking mechanism, a lifting mechanism, a temporary support mechanism, a drilling arm mechanism, a pump station part, an electrical system and a hydraulic system. According to the narrow-fuselage six-arm fully hydraulic anchor rod anchor cable drill carriage, two rotating workbenches are arranged in front of a machine body, and each rotating workbench is provided with two drilling arms which rotate by 90 degrees through the rotating workbenches, the drill carriage is folded to make the narrow fuselage state be only 1.4 m, passing of the drill carriage and an integrated extractor in a roadway is achieved, the drill carriage can be unfolded by 5 meters when reaching a roadway head-on, four front drilling arms mainly hit a top anchor rod, two rear drilling arms mainly hit a top anchor cable and a side anchor rod, the six drilling arms work simultaneously, rapid anchor protection of the roadway can be realized, support efficiency can be greatly improved, tunneling footage is greatly improved, the coal extraction imbalance contradiction is better solved, and safe, efficient and benign development of coal production is promoted.

The invention relates to the field of tunnel construction, in particular to a construction method for newly increasing an arched open cut tunnel at a railway operating line tunnel portal. The construction method solves the problems that the conventional construction method for newly increasing the arched open cut tunnel at the railway operating line tunnel portal has complex process, difficult operation, low construction efficiency, large safety risk, poor construction quality and the like. The construction method comprises the following steps of: surveying setting-out, construction of manually digging hole piles, fiber concrete slab prefabrication, joist construction, processing and assembly of an H profile steel frame, short side wall construction, arch construction of the arched open cut tunnel, end-sealing concrete construction and the like. The fiber concrete slab and the profile steel frame form an integral structure, so the stability is good, and the safety is ensured; the method avoids formwork removal operation after arch concrete pouring is finished, simplifies the construction process, accelerates the construction progress, and has considerable economic benefit; the profile steel frame is uniformly processed in a processing factory and pre-assembled and hoisted on site so as to shorten the operation time and improve the construction efficiency; and the fiber concrete slab is prefabricated in the factory and then arranged on site, so the arched open cut tunnel has surface finish and attractive appearance.

The invention discloses a wet concrete spouting process for use under a coal mine. A mechanical grouting production line is adopted, and comprises a crawler-type movable wet concrete sprayer, a crawler-type movable mixing station and a rubber-wheel movable belt feeder. The process comprises the following steps: feeding a mixed dry material into a stirring hopper of a stirring station by using a belt feeder; adding water into the stirring hopper; conveying wet concrete into a hopper of the concrete sprayer; pushing to a spray gun through a pumping system; spraying the concrete onto a tunnel construction surface in a circle-drawing manner by using compressed air containing a liquid setting accelerator; performing overall grouting on the roof and sides of a tunnel through the mechanical actions such as forward / backward extension and contraction, upward / downward pitching and leftward / rightward swing of a manipulator in the tunnel. By adopting the wet concrete spouting process, a dry (damp) spraying process adopted in the conventional grouting of tunnels under coal mines in China is eliminated, the hidden danger of dust endangering the health of workers is eliminated greatly, and the grouting mechanization level is raised.

The invention discloses an unmanned system for automatic food processing and sales. The system comprises an operation module, a food supply module and a food processing module, wherein the food supplymodule and the food processing module are arranged along the food moving path in sequence. The operation module is located on one side of the food processing module. The unmanned system further comprises a controller, a food ordering area and a food taking area, wherein the food taking area is located on one side of the food processing module; the controller is in signal connection with the foodordering area, the food supply module, the operation module and the food processing module. According to the unmanned system for the automatic food processing and sales, manual carrying, cooking and sales are not needed, the labor cost is reduced to the greatest extent, optimal standardized cooking procedures are provided, it is ensured that an unmanned store using the system achieves an optimal cooking effect, the situation that food quality differences are caused by human factors in an ordinary chain store is avoided, the speed of operation in the store is increased, and the unmanned systemcan be independently managed in various places.

The invention discloses an overhanging type movable blanking platform for construction technology. The overhanging type movable blanking platform structurally comprises protection baffle plates, a bearing frame, movable cross beams, pulleys, sliding rails, an automatic discharging device, a movable inclined plate, fixed cross beams, support upright posts, underboardings, reinforcement connecting rods and lateral protection plates, wherein the automatic discharging device comprises a fixed inner plate, a supporting point, a discharging plate, a lifting mechanism, a right-sided support plate, abalance mechanism, a fixed base, a power mechanism, a transmission mechanism and a fixed inner plate support rod. According to the overhanging type movable blanking platform for construction technology disclosed by the invention, the lifting mechanism, the balance mechanism, the power mechanism and the transmission mechanism are arranged in the automatic discharging device, and automatic discharging can be realized when cargoes are fallen into a bearing table, the problem of time consumption and labor consumption during manual transportation and blanking is solved, the construction difficultyis reduced, and the construction efficiency is improved.

The invention relates to a rock drivage process for a four-arm hydraulic drill rig and a breaking-loading-transporting-guniting integrated machine. The process is mainly characterized by adopting the four-arm hydraulic drill rig to carry out porthole drilling, hole supporting and anchor bolt and cable supporting, and adopting a rock breaking-loading-transporting-guniting integrated machine combining the functions of rock breaking, rock loading, rock transporting and guniting to cooperate to complete rock operation. The process comprises the specific steps of hole drilling, charging, blasting, temporary supporting, supporting, guniting and the like, and the four-arm hydraulic drill rig and the rock breaking-loading-transporting-guniting integrated machine alternately go into a rock driving face area to perform construction operation in the rock drivage process. The process adopts advanced technical equipment, makes the improvement on the existing rock drivage technology, entirely realizes the comprehensive mechanical operation for rock construction, and has the obvious advantages of improving rock drivage footage level, reducing labor intensity of workers, saving human power, raising efficiency, improving field operating environment, reducing the occurence of occupational diseases, effectively ensuring safe production and the like.

The invention discloses a gently-inclined broken thin lode medium-depth hole mining method. According to the mining method, the sizes of ore rooms and ore pillars are determined according to the mechanical properties of rock mass and the explosion power cast blasting energy distance so as to rationally divide and arrange the ore rooms and the ore pillars; medium-depth blast holes are drilled in the ore pillars, and ore mining is performed; and by combing explosion power transportation and mechanical transportation, the caving ore is transported, such that the safe and efficient mining is performed on the gently-inclined broken thin lode. According to the present invention, by using the medium-depth mining ore extraction method, the operation of the construction personnel under the stope roof can be avoided so as to ensure the safety of the construction personnel and improve the production capacity and the production efficiency of the stope; by using the explosion power transportation technology, the caving ore transportation efficiency is improved, the mining cutting engineering arrangement is optimized, the mining cutting engineering amount is reduced, and the mining process is simplified; and with the method, the problems of low production efficiency, high safety risk of the construction personnel and the like of the traditional room and pillar method can be effectively improved, and the wide practicality is provided.

The invention relates to a crevasse plugging system and plugging method. The crevasse plugging system comprises a hanging bridge used for being suspended above a crevasse; the hanging bridge is provided with a plurality of pile holes, and a stopping pile rod is arranged in each pile hole in a penetrating manner; the lower end of each stopping pile rod is used for being inserted into a riverbed ofthe crevasse; and the crevasse plugging system further comprises a water stopping piece abutting against the stopping pile rod in the flood flowing direction to stop flood. Due to the fact that the two ends of the hanging bridge are correspondingly fixed to the two sides of the crevasse, a channel for an operator to pass through is formed, and it is avoided that a person performs operation in theflood; each hanging plate, suspending above the crevasse, of the hanging bridge is provided with the stopping pile rod in a penetrating manner, and the stopping pile rods are used for being inserted into the riverbed; the water stopping piece is placed on the side, close to the inner side of the crevasse, of each stopping pile rod; each water stopping piece is limited due to stopping by the corresponding stopping pile rod, and a role of stopping the flood temporarily can be played; and at the moment, soil and stone, sand bags and other filler are thrown into the side, backing onto the riverbed, of the water stopping pieces, and washing away by the flood is not likely to be caused, the crevasse plugging time is shortened, and the work efficiency is improved.

The invention relates to a comprehensive mechanical rock drift excavating process, which adopts a comprehensive mechanical rock drift operation line, and is characterized in that the comprehensive mechanical rock drift operation line comprises a comprehensive rock drift excavating machine, a crawler-type movable belt conveyer and a crawler-type movable wet-type mortar spraying machine, wherein the comprehensive rock drift excavating machine is used for excavation and supporting operation, the crawler-type movable belt conveyer is used for conveying rocks from a working surface to the outside, and the wet-type mortar spraying machine is used for carrying out wet-type mortar spraying sealing to a rock drift. In the rock drift excavating process, the comprehensive mechanical rock drift excavating machine which integrates rock cutting, rock loading, rock carrying and supporting is adopted for rock drift excavating, and the wet-type mortar spraying machine is used for spraying mortar, so that the rock shift operation can be carried out. According to the invention, the original blasting and rock-breaking process is cancelled, the construction process is simplified, the production with potential safety hazards can be greatly reduced, and the safety performance is greatly improved.

The invention discloses an automatic replacing device for a hobbing cutter of a shield tunneling machine. The automatic replacing device comprises a main board, wherein a slide slot is formed in the main board; a fixed plate capable of sliding is arranged in the slide slot; a fixing device for fixing equipment is arranged in the fixed plate; a folding slot is formed in the bottom wall of the slideslot; and a slide block capable of sliding is arranged in the folding slot. The automatic replacing device is simple in structure, is convenient in operation, is convenient in maintenance, can automatically replace the hobbing cutter, prevents staff from operating under an environment higher than barometric pressure, guarantees body safety of staff, reduces labor intensity of a worker, improves cutter replacing efficiency of the shield tunneling machine, and has a relatively high use and popularization value.

The invention provides a protection device of a slag pot car backup camera pick-up lens. The protection device of the slag pot car backup camera pick-up lens comprises a box, a pick-up lens box and a cooling mechanism, wherein a view window is formed in one side wall of the box, the pick-up lens box is provided with an inner cavity for containing the slag pot car backup camera pick-up lens, a perspective portion for the lens to pick up images is arranged on the side wall of the pick-up lens box, the pick-up lens box is fixed in the box, the perspective portion directly faces the view window, and the cooling mechanism is arranged in the box, and used for cooling the box. BY using the protection device of the slag pot car backup camera pick-up lens, normal work of the slag pot car backup camera pick-up lens under severe environment can be effectively achieved, the slag pot car backup camera pick-up lens is enabled to meet field conditions, normal running of a backup camera function is successfully realized, use life of the lens is greatly prolonged, and conditions are created for normal and safe back run of a slag pot car.

An aircraft (20) route planning method, a console (10), and an aircraft system and storage medium are provided. The aircraft route planning method includes: acquiring route data; determining a route direction according to the route data, and determining a flight zone area based on the route direction; dividing the flight zone area into several sub flight zone areas along the direction of the flight route; planning the route path of the aircraft (20) in the several sub flight zone areas. Zone planning for the mission of the strip route is realized, and work efficiency is improved.

Novel purpose for controlling harmful cotton spider mites by utilizing amblyseius cucumeris as biological pesticide, wherein Amblyseius cucumeris is used as natural enemy for controlling and preventing cotton acarid, i.e. Cotton spider mites, including Tetrangchus urticae Koch, T. truncatus Ehara, T. cinnabarinus Boisduva and T. turkestani ugarov.

The invention discloses an automatic liquid spraying control method. Water spraying is conducted in at least one of the four modes, wherein according to the first mode, water is sprayed through a mainspraying gun on a vehicle-mounted platform; according to the second mode, under the surveillance of an aircraft, the water is sprayed through the main spraying gun or a crawler-type walking vehicle;according to the third mode, in the absence of the aircraft, the water is sprayed through the crawler-type walking vehicle; according to the fourth mode, the water is sprayed through the aircraft. Bymeans of the automatic liquid spraying control method, automatic spraying can be achieved, and the spraying operation efficiency is high.

The invention discloses horizontal deep hole stage slicing and caving mining method and stope for crushing a thin ore body. The method comprises the following steps: arranging the stope along the orebody, and arranging an ore gathering roadway at the bottom of the stope; arranging footway ventilation shafts at both ends of the stope; arranging a cutting well and a cutting lane in the middle of the ore gathering roadway, wherein the cutting well communicates with the ore gathering roadway through the cutting lane; in the footway ventilation shafts, arranging drilling chambers at intervals along the height direction, and arranging horizontal medium-deep holes in the drilling chambers; adopting medium-deep hole slicing for cutting blasting and undercutting blasting to provide compensation space. The method can quickly recover the stope, avoid the safety hazard of the operation in the stope by adopting an original shallow-hole shrinkage method, greatly improve the mining operation efficiency, simplify the ore removal bottom structure, and improve the undercutting and ore removal efficiency; the method is suitable for crushing the thin ore body of a steep slope, can improve the safetyof the operation and the ore recovery rate, and can effectively reduce the loss rate and the dilution rate.

The invention relates to an automatic cleaning system, in particular to an evaporator automatic cleaning system adopting a cantilever beam structure. The evaporator automatic cleaning system comprises a transverse linear sliding table, an upright, diagonal tension cables, rapid pipe feeders, a bearing, a rotating table mechanism and a high-pressure water jet unit. The transverse linear sliding table is connected with the rotating table mechanism by a bolt; the rotating table mechanism is connected with the upright by the bearing; the rapid pipe feeders are placed on the transverse linear sliding table; the rapid pipe feeders are connected with the transverse linear sliding table by bolts; positioning pipes of the rapid pipe feeders are vertical to the horizontal plane; the high-pressure water jet unit is connected with the rapid pipe feeders by high-pressure hoses. The automatic cleaning system has a simple structure, is low in cost, can be automatically positioned in an evaporator and has a high cleaning speed; cleaning efficiency is improved; labor cost is reduced; people are avoided operating in the high-temperature and humid environment.

The invention discloses a railway train automatic water supply device comprising a first driving device, a second driving device, a water supply pipe and a water supply connector arranged at the end of the water supply pipe. The water supply connector faces a carriage of a train. The first driving device is used for driving the water supply pipe to be gradually close to or deviated from the carriage. The water supply connector comprises a water supply seat internally provided with a water supply channel and a valve arranged on the water supply channel. A water receiving seat communicating with a water tank is arranged on the carriage. A water receiving channel used for being connected with the water supply channel in a butting mode is arranged in the water receiving seat. The second driving device is used for driving opening and closing of the valve. Water supply automation is achieved, labor consumption at the time of water supply of the train is omitted, the working strength of workers is reduced accordingly, and the situation that the workers work under the dangerous and severe environment is also avoided.

A construction method for a connection joint of a prefabricated sandwich side fascia specially comprises the steps of S1, hoisting the prefabricated sandwich side fascia, positioning the bottom edge, erecting an oblique support and leveling the prefabricated sandwich side fascia; S2, hoisting a superposed beam, erecting a vertical support, installing a horizontal fixed support, and fixing the superposed beam to the prefabricated sandwich side fascia; S3, hoisting and positioning a superposed floor slab; S4, making a erection bar penetrate through a connecting cable in a shear key groove, and connecting the erection bar with a stirrup of a superposed beam cast-in-situ layer fixedly; S5, placing a shear key additional rebar in the shear key groove and a superposed floor slab cast-in-situ layer; S6, arranging superposed floor slab cast-in-situ layer reinforcing mesh panels, pouring cast-in-situ concrete, and conducting curing and molding; S7, dismantling a bottom edge positioning device and the oblique support of the prefabricated sandwich side fascia. Compared with the prior art, the construction method for the connection joint of the prefabricated sandwich side fascia has the advantages that rebar bending is avoided on a construction site, construction efficiency is improved, and the rebar processing and construction technology is simplified.

The invention discloses high-temperature baking equipment. The device comprises a baking oven, a battery clamp, a feeding mechanism, a discharging mechanism and a conveying mechanism. The conveying mechanism comprises a lifting mechanism guide rail, a lifting mechanism sliding block, a longitudinal mechanism guide rail, a longitudinal mechanism sliding block, a transverse mechanism guide rail, a transverse mechanism sliding block and a grabbing and clamping mechanism capable of grabbing the battery clamp. The longitudinal mechanism guide rail is arranged on a floor. The longitudinal mechanismguide rail is provided with the longitudinal mechanism sliding block. The longitudinal mechanism sliding block is provided with the lifting mechanism guide rail. The lifting mechanism guide rail is provided with the lifting mechanism sliding block. The lifting mechanism sliding block is provided with the transverse mechanism guide rail. The transverse mechanism guide rail is provided with the transverse mechanism sliding block. The transverse mechanism sliding block is provided with the grabbing and clamping mechanism. The conveying mechanism is arranged in the baking oven, so that manual carrying is not needed in the battery baking process, the labor cost is reduced, heat diffusion is reduced, and workers are prevented from working in a high-temperature environment.

The invention discloses a trench integrated mine collecting and mining method of an inclined ore body. A trench construction area is arranged in an empty area formed after mining. Trench constructionof the trench construction area specifically includes the steps that a trench slope used for guiding falling ore to move downward and / or protect the upper disc surface of the ore body is constructed at the corner of the upper disc surface and a bottom plate surface of the trench construction area; a mine collecting channel is reserved in the bottom plate surface when the trench slope is constructed, and the constructed trench slope, the reserved mine collecting channel and the lower disc slope of the ore body form a trench used for gathering the falling ore extracted from the upper portion ofthe trench to the mine collecting channel; the ore body on the upper portion of the trench is extracted and output from the upper portion and / or the side face of the mine collecting channel. The method easily improves the ore recovery rate, ore output efficiency, productivity, recovery safety and comprehensive economic benefits, and is suitable for exploitation of inclined ore bodies with medium stability from thin to medium thick and construction of a trench type mine output bottom structure.

The invention relates to the technical field of ship construction, in particular to an icebreaker stem, an installation method of the icebreaker stem and a ship. According to the icebreaker stem, a middle longitudinal wall plate is divided into an installation part and an icebreaking part, and a thickened outer plate is installed on the installation part, and the icebreaking part extends out of the thickened outer plate as an icebreaking structure, so that an integrated cast steel stem is not needed, and the cost is saved; and a transverse supporting structure is divided into two independent parts of a transverse rib and a reinforcing material, and the transverse rib and the reinforcing material are fixedly arranged between the thickened outer plate and the installation part, so that the internal structure is simplified, the installation is convenient, working in a narrow space is avoided, and the construction efficiency and quality of the stem are improved. The installation method ofthe icebreaker stem is used for installing the icebreaker stem, working in a narrow space is can avoided, and the construction efficiency and quality of the stem are improved. The construction efficiency and quality of the ship are improved through the application of the icebreaker stem, and the ship can be suitable for polar navigation icebreaking tasks.

The invention provides a method for recovering vibration energy of rear axle of an electric automobile. The method for recovering the vibration energy of the rear axle of the electric automobile comprises the steps of mounting a hydraulic cylinder between a frame and the rear axle of the electric automobile in a floating manner; forming a first oil port in a cavity, without a rod, of the hydrauliccylinder; forming a second oil port is in a cavity, with a rod, of the hydraulic cylinder; connecting an electromagnetic valve set to the first oil port and the second oil port; measuring a distancebetween the frame and the rear axle to obtain distance data; setting a time interval; when a distance measured within the time interval is reduced in the electric automobile running process, enablinghydraulic oil in the cavity without the rod to be drained into an oil tank via the first oil port, the electromagnetic valve set and a power generator by controlling the electromagnetic valve set; when the distance measured within the time interval is increased, enabling hydraulic oil in the cavity without the rod to be drained to the oil tank via the second oil port, the electromagnetic valve setand the power generator by controlling the electromagnetic valve set; and using the power generator to generate power and storing electric energy into a storage battery of the electric automobile. Byusing the method for recovering the vibration energy of the rear axle of the electric automobile, higher electric energy conversion efficiency is realized.

The invention discloses a sargassum kjellmanum attaching base supporting device and a fine sargassum kjellmanum variety breeding method. The attaching base supporting device comprises connecting ropes wound around two pulleys to form a closed loop, the pulleys fixed in a sea area raft frame, a supporting frame and lifting ropes, wherein the two parallel connecting ropes respectively move toward the opposite directions with rotation of the pulleys, the supporting frame is an upper-cover-free cuboid, the body wall of the supporting frame is full of small holes, the outer side face of the edge is provided with penetrating holes, the lifting ropes sequentially penetrate through the multiple penetrating holes along the edge of the supporting frame and are fixed to the penetrating holes, and two ends of each lifting rope are respectively fixed to the two parallel connecting ropes. The problems of low existing sargassum kjellmanum seedling yield, low stress-resistance capability and low effective ingredient content are solved, quality improvement of sargassum kjellmanum seedlings and fine variety breeding can be achieved.

The invention discloses a high-altitude operation device for electric power communication cables. The three arms, the third hydraulic rod, the body, the rotating platform, the base, the driving wheel, and the controller, the driving wheels are installed on the left and right sides of the base, and there are 4 driving wheels arranged symmetrically in pairs. The center position of the top surface of the base is connected with the bottom surface of the machine body through the rotating pan platform. The beneficial effect of the high-altitude operation device for power communication cables of the present invention is that the device adopts an overweight alarm platform, which has the function of overweight alarm, and can prevent the device from Working under the condition of overweight can not only prolong the service life of the device, but also have a higher guarantee for the personal safety of the operator.

The invention relates to a charging and emptying device for a solid rocket motor, which includes a positioning device for ammunition powder columns and a driving device for a water inlet knife rod. The other end of the chuck clamps the grain to be cleaned, and the turntable motor drives the three-jaw chuck to rotate, and then drives the grain to rotate; the linear module is fixed on the mounting seat, and the module slider is used as the output end of the linear module. One end of the rod connecting plate is fixedly connected to the module slider, and the other end is connected to one end of the water inlet knife rod. The other end of the water inlet knife rod is installed with a jet head, and the module motor is installed on the linear module. The slide block drives the knife bar connecting plate to reciprocate, and then drives the water inlet knife bar to clean the inside of the powder column. The invention can quickly clamp and loosen the powder column during the emptying process, and use high-pressure water jet to clean the inside of the powder column, and has the advantages of compact structure, low energy consumption, low noise, high efficiency and safety, good adaptability, simple and convenient manufacture and installation The advantages.

The invention provides an energy recycling device for a rear axle of an electric vehicle. The energy recycling device comprises a rear axle suspension unit, a hydraulic valve group unit, a control monitoring unit and an energy recycling unit, wherein the rear axle suspension unit comprises a hydraulic rod and a rear axle main body positioned below a frame of the electric vehicle; the hydraulic rodcomprises a cylinder barrel which is floatingly connected to the rear axle main body; a rodless cavity of the cylinder barrel is equipped with a first oil hole; a rod cavity of the cylinder barrel isequipped with a second oil hole; the hydraulic valve group unit comprises a first two-position four-way solenoid valve and a second two-position four-way solenoid valve; and the control monitoring unit comprises a single chip microcomputer, a first relay, a second relay and a distance detecting device for measuring a distance between the rear axle main body and the frame of the electric vehicle.The energy recycling device for the rear axle of the electric vehicle provided by the invention can convert vibrating energy into electric energy, increases endurance mileages of the electric vehicle,and has relatively high conversion efficiency.

The invention discloses a down-hole ultrasonic oscillation unfreezing device and method. The unfreezing device comprises a power supply and a cable collection and release device which are placed on the ground, a cable winds the cable collection and release device, and a depth positioning tool and an ultrasonic oscillation transducer are connected to the lower end of the cable; the ultrasonic oscillation transducer can extend to the upper portion or interior of a down-hole water distributor core for unfreezing operation. The depth positioning tool comprises a cable guiding connector and a magnetic positioning tool; the ultrasonic oscillation transducer comprises an axial ultrasonic transmitter and a radial ultrasonic transmitter. According to the down-hole ultrasonic oscillation unfreezingdevice and method, the problem can be effectively solved that since a water distributor is used for layered water injection of an existing offshore oilfield flooding well, the water distributor is frozen. Accordingly, the operation of a mobile pipe column is avoided, the operation intensity is lowered, the operation time is shortened, and the operation cost is reduced.