42results about How to "Control opening size" patented technology

The invention discloses an auxiliary device for installation of a steel structure. The auxiliary device comprises a fixing frame, the fixing frame is of the U-shaped structure, bolts are correspondingly and rotatably connected to the two sides of the fixing frame in a penetrating mode, fixing plates are arranged on the sides, close to the inner side of the fixing frame, of the bolts, first connecting plates are arranged at the upper ends of the bolts, the first connecting plates are fixedly connected with the fixing frame, rotating shafts are arranged on the first connecting plates in a penetrating mode, and are connected with second connecting plates, the other ends of the second connecting plates are provided with guide rollers, and two second connecting plates are locked with each otherby connecting a fixing rod. According to the auxiliary device, when the steel structure is butted, the steel structure lifted by a crane can absorbs the auxiliary device by a strong magnet, then theauxiliary device is pulled to the position of the steel structure fixed by the fixing frame by a pull rod, abutting is conducted, the dangerous operation of dragging the steel structure in the artificial high attitude is avoided, the steel structure cannot swing during connecting, and the connection is fast and easy.

The invention discloses a powder laying device for rapid forming manufacturing. The device comprises a powder laying compaction system and a forming system, and is characterized in that the powder laying compaction system comprises a scraping plate, hoppers arranged on the two sides of the scraping plate, baffles arranged at the lower ends of the hoppers, discharging motors driving the baffles to open the hoppers for discharging, lifting driving devices arranged on the hoppers and pressing roller components arranged at the output ends of the lifting driving devices; each pressing roller component comprises a pressing roller seat, a pressing roller and a pressing roller driving motor, wherein the pressing rollers are arranged on the pressing roller seats; and the forming system comprises a forming cylinder and a jacking mechanism arranged in the forming cylinder, and the pressing rollers act on the upper surfaces of the forming cylinders. Compared with the prior art, the powder laying device has the beneficial effects of being uniform in powder laying thickness, high in pressing compactness of the forming part pressing rollers, rapid in forming and the like.

The invention relates to a multifunctional umbrella structure with holes. The multifunctional umbrella structure comprises ribs, an umbrella rod and an umbrella cover. The ribs are connected to the umbrella rod. The umbrella cover is connected to the ribs and provided with the through holes. The through holes are formed in the umbrella cover; when the wind is strong, the umbrella cover is not prone to being lifted up; when the multifunctional umbrella structure is used in the sun, part of sunshine can enter the multifunctional umbrella structure, a small amount of sunshine can be received while the sun-resistant effect is achieved, and the body immunity can be improved.

The invention provides a hydro-pneumatic suspension system and engineering machinery with the same. The hydro-pneumatic suspension system comprises a suspension cylinder, a pressure sensor, a controller and an energy accumulator unit. The pressure sensor is configured to detect the pressure of a rodless cavity of the suspension cylinder and output a pressure value. The controller is configured toreceive the pressure value and compare with a preset pressure value, a first control command corresponding to the pressure value is output according to the corresponding relation between the preset comparison result and the first control command. The energy accumulator unit is configured to receive the first control command and perform the corresponding preset actions to obtain the corresponding preset stiffness. The preset actions include changing the initial pressure of an energy accumulator and / or changing the capacity of an energy accumulator connected to the hydro-pneumatic suspension system. The hydro-pneumatic suspension system and the engineering machinery with the same can change the stiffness of the suspension system under different loads to achieve better hydro-pneumatic suspension function. Furthermore, suitable damping can be matched according to different road conditions to improve the driving and riding comfort.

The invention provides a gasahol pump which comprises a valve jacket, an end cover and a suction pipe, and is characterized in that a pump assembly consists of a ferrule, an inner inserted link, a spring and a button switch, wherein the suction pipe is connected at the bottom of the ferrule, and the inner inserted link is inserted in the ferrule; the ferrule is provided with a spacer arranged in the direction of a cross section, the spacer is provided with an axial through channel, the bottom end of the inner inserted link is adaptive to the channel in shape and can seal the channel; the button switch is matched with the inner inserted link and can drive the bottom end of the inner inserted link to leave away the channel, the spring is sheathed on the inner inserted link, and the spring has a trend for leading a first oblique surface and a second oblique surface to be supported tightly at all the time and the bottom end of the inner inserted link to seal the channel. The gasahol pump can be used for effectively controlling the opening size of the ferrule channel and can apply force easily by adopting horizontal pushing mode for operation; and in use process, the opening or closing of the ferrule channel can be realized through the mobile contact of the first oblique surface and the second oblique surface, wear caused by extrusion and deformation can be effectively reduced, and the service life can be prolonged.

The invention relates to a pair of electric scissors. The scissors include a main body, a motor, a planet gearbox, a transmission assembly, a mobile blade assembly and a fixed blade, wherein the output shaft of the motor is connected with the input end of the planet gearbox, the output end of the planet gearbox is connected with the input end of the transmission assembly, and the transmission assembly is arranged on one end of the main body; the mobile blade assembly and the fixed blade are both mounted on the other end of the main body, and the mobile blade assembly and the fixed blade form a scissor shape and are both connected with the main body through a rotating shaft; the mobile blade assembly is rotatably connected with the transmission assembly and driven by the transmission assembly to rotate, and cooperates with the fixed blade for cutting during rotation. Compared with the prior art, the motor controls the rotation of the mobile blade assembly through the planet gearbox and the transmission assembly, the mobile blade assembly cooperates with the fixed blade for cutting, so that electric cutting is achieved, more convenience is provided, labor intensity is decreased, shearing efficiency is improved and the electric scissors are high in safety during shearing.

The invention discloses an unloading device, agricultural machinery with the same and an unloading method. The unloading device comprises a grain tank and a horizontal auger. The grain tank is provided with a first unloading hole through which grains are arrayed to the horizontal auger. The unloading device further comprises an unloading valve which controls opening and closing of the first unloading hole. According to the unloading device, opening and closing of the unloading hole of the grain tank are controlled through the arranged unloading valve, when unloading is of no need, the unloading valve can close the unloading hole at any time, the grains in the grain tank are prevented from being arrayed to the horizontal auger, the grains in the grain tank can be prevented from being accumulated on the horizontal auger and a back unloading cylinder, accordingly, when the unloading hole is continuously opened for unloading, the horizontal auger and the back unloading cylinder cannot be blocked, the horizontal auger can still rotate to convey grains, working efficiency is improved, in addition, the size of an opening of the unloading hole of the grain tank can be controlled through the unloading valve, and therefore unloading speed can be adjusted.

The invention discloses a developing apparatus and a developing method for improving the situation of poor uniformity of the line width of a pattern formed after development of a substrate when the current developing apparatus is used for performing the developing process to the substrate. The developing apparatus comprises a bearing platform and a plurality of nozzles, wherein the bearing platform is used for bearing the substrate and enabling the first extension direction of the substrate to form a preset included angle with the horizontal plane; all nozzles are arranged above the bearing platforms side by side and are away the same distance from the horizontal plane, the vertical projections of the arrangement direction of each nozzle and the first extension direction on the horizontal plane are parallel, the nozzle is used for spraying developing liquid onto the substrate in a solid cone manner, and the divergence angle of each nozzle for spraying developing liquid is adjustable so that the developing liquid sprayed by two adjacent nozzles falls onto the overlapped area of the substrate.

The invention relates to the technical field of hydraulic damper production, and discloses an artificial intelligence feeding device for fishery breeding harm prevention based on the Internet of Things and a using method. The artificial intelligence feeding device comprises a base, the top end of the base is connected with a stock bin through welding, a discharging port is formed in the bottom endof the stock bin, and an electromagnetic valve is arranged at one end of the discharging port; and a box body is movably connected to the outer wall of the discharging opening, and an adjusting mechanism is installed on the surface of the box body. According to the device, through the arrangement of an electromagnetic valve and a PLC control panel, a discharging opening can be controlled to be closed or opened, discharging of the discharging opening is controlled, a first servo motor drives a box body to rotate, fish feed located in a line body is evenly scattered through a material scattering opening, and a baffle is driven to move through a telescopic rod; the baffle can control the opening size of the material scattering opening, the number of scattered fish materials is controlled, different feeding numbers can be met according to actual requirements, and the working efficiency is improved.

The invention relates to an agricultural corn seeder, in particular relates to a precise corn seeder capable of mulching plastic film, and aims to solve the problem of single operation of the existing corn seeder. The precise corn seeder capable of mulching plastic film can finish operations such as plastic film mulching, seeding, fertilizing and earthing at the same time, and comprises a rack, a fertilizer box, a fertilizer discharge wheel, a fertilizer duct, a connection frame, a quantitative earthing wheel, a seed box and a seeding duckbill, wherein the fertilizer box is arranged at the upper side of the rack; the fertilizer discharge wheel is connected to one side of the fertilizer box; the fertilizer duct is connected to the bottom end of the fertilizer box; the connection frame is connected to the rear side of the rack; the quantitative earthing wheel is arranged at the rear end of the connection frame and is provided with the seeding duckbill; the connection frame is also provided with the seed box communicated with the seeding duckbill. The precise corn seeder capable of mulching plastic film has multiple functions of soil leveling, fertilizer application, plastic film mulching, film dibbling and earthing.

The invention relates to the technical field of medical equipment, in particular to a beam-limiting device blade driving device which is used for driving blades of a beam-limiting device. The beam-limiting device blade driving device comprises an upper-layer plate, a lower-layer plate, a rotating wheel, four hinge pins and four blade fixing and transmitting mechanisms, wherein the rotating wheel is horizontally arranged below the upper-layer plate, four pin holes are distributed in the rotating wheel in a central symmetry mode, and the rotating wheel is fixed to the lower surface of the upper-layer plate through a flange; the four hinge pins penetrate through the pin holes respectively and are arranged vertically; the four blade fixing and transmitting mechanisms are arranged at the lower ends of the four hinge pins respectively. The invention further provides the beam-limiting device provided with the beam-limiting device blade driving device and an X-ray machine. The beam-limiting device blade driving device is simple in structure, low in cost and easy to maintain.

The invention discloses an adjustable speed type blowing and absorbing machine. The machine comprises a main machine housing, and a speed regulation mechanism arranged on the main machine housing; an air tube for feeding or discharging air is arranged on the main machine housing; the speed regulation mechanism comprises a speed regulating element which can cover the air tube by a rotating manner, and a speed adjusting button for controlling the rotating position of the speed adjusting element; an adjusting through hole is formed in the main machine housing; one end part of the speed regulating element passes through the adjusting through hole and is fixedly connected with the speed regulating button; the speed regulating mechanism is that the speed regulating button is rotated and the speed regulating element is rotated so as to control the size of an opening of the air tube, and as a result, the blowing force and absorbing force of the machine can be controlled; the speed regulating mechanism used performs speed regulation by a mechanical manner, so that the cost of the machine can be reduced while the speed regulation effect of an electronic speed regulation device is achieved.

The invention provides a pressure relief valve, a respiratory support equipment air path and respiratory support equipment. The pressure relief valve comprises a valve body, wherein the valve body is of a hollow structure provided with an air inlet and a pressure relief opening, a diaphragm is arranged on the lower portion of the valve body, the air inlet communicates with the pressure relief opening through a space above the diaphragm, and a driving device is arranged on the lower portion of the diaphragm and used for driving the diaphragm to move up and down. The air inlet and the pressure relief opening are formed in the upper portion of the pressure relief valve at the same time, control over the air flow is achieved by controlling the distance between the diaphragm and the pressure relief opening, the pressure relief valve is used for being connected with a branch of the respiratory support equipment air path and connected with a main path of the air path through one air inlet, the air resistance of the respiratory support equipment air path can be reduced, pressure control is achieved by controlling the pressure relief magnitude of the pressure relief valve on the branch, two or more pressure relief valves are combined for use in the air path according to use requirements, the pressure control range is expanded, and the pressure control precision is improved.

The invention discloses pneumatic based optical fiber slag removal equipment, and relates to the field of optical fiber sensing. The pneumatic based optical fiber slag removal equipment comprises a first air bellow and a second air bellow. A suction opening is formed in the first air bellow. One side of the second air bellow communicates with the first air bellow. An opening is formed in the otherside of the second air bellow. A fan is arranged at the opening, and the wind direction of the fan is outward. Before an optical fiber is cut and after the fan is turned on, the suction opening can suck optical fiber slag into the first air bellow, the hidden danger that the human body is hurt by the optical fiber slag is avoided, and the risk that the optical fiber slag is blown by the mouth, and the optical fiber slag pops up to the human body is avoided. The pneumatic based optical fiber slag removal equipment is convenient to carry, can be taken and used at any time and is specially usedfor removing the optical fiber slag in various places.

The invention discloses a greenhouse for grape planting. The greenhouse for grape planting comprises an upper top plate, a servo electric cylinder, a control switch, a thin film winding shaft, a closed thin film, a fixed connecting rod, a positioning clamping piece and a limiting clamping base, wherein the upper top plate is fixed to an upper supporting frame, lower supporting legs are fixedly arranged on the lower side of the upper supporting frame, a reinforcing rod is fixedly arranged at the joint of the upper supporting frame and the lower supporting legs, a middle supporting column is fixedly arranged in the middle of the lower side of the reinforcing rod, a movable connecting base is fixedly arranged on the outer side of the middle supporting column, an inner movable frame is installed on the outer side of the movable connecting base, the control switch is fixedly installed on the middle supporting column, the control switch is electrically connected with the servo electric cylinder, and the outer side of the thin film winding shaft is wound with the closed thin film. According to the greenhouse for grape planting, after grapes are ripe, the position height of the grapes on the inner movable frame can be changed so that the grapes can be conveniently picked, the grape picking efficiency is effectively improved, and the use value of the greenhouse can also be improved.

The invention discloses a water-saving temperature control device for a water heater. The device comprises a downcomer and a first water tank, wherein a plurality of water pipe branches are successively divided outside along the water down direction of the downcomer to lead water in the first water tank to a first water outlet pipe in the downcomer, a drain pipe for draining water of the whole device and a first water inlet pipe for introducing water into the first water tank successively. A thermistor for detecting the water temperature at the position is arranged on the downcomer above the first water outlet pipe, a normally closed temperature switch for inducing the water temperature in the position is arranged on the downcomer between the first water outlet pipe and the drain pipe; a first normally closed electromagnetic valve is arranged on the first water outlet pipe, a normally open electromagnetic valve is arranged on the drain pipe, and a second normally closed electromagneticvalve is arranged on the first water inlet pipe. The water-saving temperature control device disclosed by the invention has the advantages that by additionally arranged the first water tank, the water temperature of water discharged from the drain pipe is a preset water temperature by detecting the whole circuit, so that the energy source is saved greatly, and the water using comfort level is also guaranteed.

The invention provides a discharging control device for particle materials in a chemical reaction tower, which comprises a discharging inclined pipe, a discharging vertical pipe and a plugging device, wherein the discharging inclined pipe is provided with a hinge seat at an opening of the discharging inclined pipe; the discharging vertical pipe is vertically and downwards arranged on the discharging inclined pipe and is communicated with the discharging inclined pipe; the plugging device comprises a flange cover, a supporting flange and a blocking piece, the supporting flange is arranged at the opening of the discharging inclined pipe, the flange cover is arranged on the outer side surface of the supporting flange, the flange cover and the supporting flange are both hinged to the hinge seat, the blocking piece is inserted into the discharging inclined pipe, a connecting rod assembly is connected between the blocking piece and the supporting flange, the connecting rod assembly is used for driving the blocking piece to slide in the discharging inclined pipe relative to the supporting flange, a traction assembly is connected between the flange cover and the blocking piece, and the traction assembly is used for driving the blocking piece to move in the discharging inclined pipe so as to conduct discharging control over the discharging vertical pipe. The discharging speed of the chemical particle materials can be controlled, meanwhile, the discharging process is in a closed environment, and pollution to the environment is avoided.

The invention relates to the technical field of medical equipment, in particular to a beam-limiting device blade driving device which is used for driving blades of a beam-limiting device. The beam-limiting device blade driving device comprises an upper-layer plate, a lower-layer plate, a rotating wheel, four hinge pins and four blade fixing and transmitting mechanisms, wherein the rotating wheel is horizontally arranged below the upper-layer plate, four pin holes are distributed in the rotating wheel in a central symmetry mode, and the rotating wheel is fixed to the lower surface of the upper-layer plate through a flange; the four hinge pins penetrate through the pin holes respectively and are arranged vertically; the four blade fixing and transmitting mechanisms are arranged at the lower ends of the four hinge pins respectively. The invention further provides the beam-limiting device provided with the beam-limiting device blade driving device and an X-ray machine. The beam-limiting device blade driving device is simple in structure, low in cost and easy to maintain.

The invention discloses an engineering waste gas emission device, and relates to the technical field of waste gas treatment. The engineering waste gas emission device comprises a base plate and a shell, a plurality of mounting grooves are formed in the upper surface and the lower surface of the base plate, the lower end of the shell is slidably connected with the mounting grooves, a plurality of matching holes are formed in the surfaces of the two sides of the shell, screw rods are mounted in the matching holes and penetrate through the base plate, the peripheral side faces of the screw rods are in threaded connection with a plurality of nuts, and the nuts abut against the two side faces of the base plate. The base plate and the shell are used, the shell and the base plate are assembled to form a pipeline capable of exhausting waste gas, meanwhile, the base plate and the shell are independent of each other, when the waste gas pipeline is laid, the base plate can be laid firstly, then the shell is installed on the upper surface and the lower surface or one of the upper surface and the lower surface of the base plate according to requirements, so that the waste gas pipeline is formed, when the shell only needs to be installed on one surface of the base plate, the other surface of the base plate can be reserved, the shell can be installed subsequently, the structure is novel, the laying mode is flexible, and the device can be detached for transportation.

The invention provides a hydro-pneumatic suspension system and engineering machinery with the same. The hydro-pneumatic suspension system comprises a suspension cylinder, a pressure sensor, a controller and an energy accumulator unit. The pressure sensor is configured to detect the pressure of a rodless cavity of the suspension cylinder and output a pressure value. The controller is configured toreceive the pressure value and compare with a preset pressure value, a first control command corresponding to the pressure value is output according to the corresponding relation between the preset comparison result and the first control command. The energy accumulator unit is configured to receive the first control command and perform the corresponding preset actions to obtain the corresponding preset stiffness. The preset actions include changing the initial pressure of an energy accumulator and / or changing the capacity of an energy accumulator connected to the hydro-pneumatic suspension system. The hydro-pneumatic suspension system and the engineering machinery with the same can change the stiffness of the suspension system under different loads to achieve better hydro-pneumatic suspension function. Furthermore, suitable damping can be matched according to different road conditions to improve the driving and riding comfort.

The invention relates to a multifunctional umbrella structure with holes. The multifunctional umbrella structure comprises ribs, an umbrella rod and an umbrella cover. The ribs are connected to the umbrella rod. The umbrella cover is connected to the ribs and provided with the through holes. The through holes are formed in the umbrella cover; when the wind is strong, the umbrella cover is not prone to being lifted up; when the multifunctional umbrella structure is used in the sun, part of sunshine can enter the multifunctional umbrella structure, a small amount of sunshine can be received while the sun-resistant effect is achieved, and the body immunity can be improved.

The invention discloses a casting and salvaging test-free measuring and regulation instrument. The casting and salvaging test-free measuring and regulation instrument comprises a measuring skeleton, and a flow measuring device, a signal processing device, a motor, a supporting and locating device and a regulation device are sequentially arranged on the measuring skeleton from top to bottom; a driving device used for driving the supporting and locating device to be opened or closed and driving the regulation device to operate is further arranged between the motor and the supporting and locating device; and the motor is connected with the supporting and locating device and the regulation device through the driving device. According to the casting and salvaging test-free measuring and regulation instrument, a novel cam arm opening and collecting structure is adopted, the technical problem that in the prior art, visual operation, quantitative fine water injection and depth calibration of a concentric measuring and regulation downhole instrument cannot be achieved is solved, and operation time is greatly shortened.

The invention provides a stacked three-way flow valve, and belongs to the technical field of three-way flow valves. The stacked three-way flow valve comprises a valve body, a flow adjustment valve core and a pressure compensation valve core; a valve hole is formed in the valve body; the valve hole comprises an oil outlet chamber, a first channel, an oil inlet chamber, a second channel, an oil returning chamber, a third channel and a bottom chamber which are connected in sequence; a first through hole is formed in the flow adjustment valve core; a second through hole is formed in the pressure compensation valve core; the pressure compensation valve core is arranged in the oil inlet chamber and the oil outlet chamber, and the first through hole is positioned in the first channel; the pressure compensation valve core is arranged in the oil inlet chamber, the oil returning chamber, and the bottom chamber, and seals the third channel; and the second through hole is positioned in the secondchannel. The stacked three-way flow valve has the beneficial effects that the pressure compensation effect is good; stable flow can be maintained; the pressure change difference at an inlet is small;and the speed of an executing element can be controlled precisely.

The invention relates to a manual tightly-pressing tool for lap joint of colorful plate tiles and an operating method of the manual tightly-pressing tool. The manual tightly-pressing tool comprises asupport, an undercutblock and a limiting block, the lower portion of the support and the upper portion of the undercut block are hinged through a rotary shaft, and the upper side and the lower side ofthe rotary shaft are fixedly provided with a limiting handle and a connecting rod correspondingly. The limiting block is arranged on the connecting rod in an adjustable mode, a pressing shaft is arranged on the upper portion of the undercut block, and an undercut tooth is arranged on the lower portion of the undercut block. A rotatable transmission shaft and a gear set capable of increasing torque are arranged on the upper portion of the support, an undercut handle is fixed to the upper side of the transmission shaft, and an input gear of the gear set is coaxially connected with the transmission shaft. One end of a transmission rod is eccentrically hinged to an output gear of the gear set, and the other end of the transmission rod is hinged to the pressing shaft. The pressing shaft and the limiting block are located on the two sides of the rotary shaft correspondingly. During work, after the undercut handle and the limiting handle are operated, the undercut block tightly presses the one side of the lap joint in an undercut mode, and the limiting block tightly presses the other side of the lap joint in a limiting mode. Through the manual tightly-pressing tool, the water leakage phenomenon is avoided, tile faces are not prone to being damaged, operating is easy and capable of saving labor, the efficiency is high, the construction accuracy is high, and the cost is low.

The invention discloses an epitaxial structure and a manufacturing method thereof. The epitaxial structure comprises a first carrier supply layer located on a substrate; a regulation and control structure which is located on the first carrier supply layer and comprises a multi-quantum well layer; a plurality of V-shaped recesses which extend into the regulation structure from the surface of the regulation structure; and a second carrier supply layer on the regulation structure. At least two V-shaped recesses are different. According to the epitaxial structure, the extension depth of each V-shaped recess in the regulation and control structure is controlled through the regulation and control structure, the distribution uniformity of the V-shaped recesses in the longitudinal direction of theepitaxial structure is improved, the stress is dispersed, and the uniformity of the mechanical strength of the epitaxial structure is improved, so that the internal quantum efficiency of a light-emitting element is improved.

The invention provides a gasahol pump which comprises a valve jacket, an end cover and a suction pipe, and is characterized in that a pump assembly consists of a ferrule, an inner inserted link, a spring and a button switch, wherein the suction pipe is connected at the bottom of the ferrule, and the inner inserted link is inserted in the ferrule; the ferrule is provided with a spacer arranged in the direction of a cross section, the spacer is provided with an axial through channel, the bottom end of the inner inserted link is adaptive to the channel in shape and can seal the channel; the button switch is matched with the inner inserted link and can drive the bottom end of the inner inserted link to leave away the channel, the spring is sheathed on the inner inserted link, and the spring has a trend for leading a first oblique surface and a second oblique surface to be supported tightly at all the time and the bottom end of the inner inserted link to seal the channel. The gasahol pump can be used for effectively controlling the opening size of the ferrule channel and can apply force easily by adopting horizontal pushing mode for operation; and in use process, the opening or closing of the ferrule channel can be realized through the mobile contact of the first oblique surface and the second oblique surface, wear caused by extrusion and deformation can be effectively reduced, and the service life can be prolonged.

The invention relates to the field of granule manufacturing, and relates to an elevating opening and closing type material collecting device for plastic granules. The material collecting device comprises a material bag placed on the ground, a supporting frame, a floating lifting frame, a pair of hydraulic cylinders, a material guiding pipe, an opening and closing mechanism and a lower guiding cylinder, wherein the floating lifting frame can be vertically arranged on the supporting frame in a sliding mode, the pair of hydraulic cylinders are vertically arranged, piston rods of the hydraulic cylinders are connected with the floating lifting frame and supports the floating lifting frame, the material guiding pipe is located under a discharging port of a discharging chute, the opening and closing mechanism is used for opening and closing the discharging port of the material guiding pipe, the lower guiding cylinder is fixedly arranged on the supporting frame, the upper port of the lower guiding cylinder is located right under the discharging port of the material guiding pipe when receiving and guiding a material, and the lower port of the lower guiding cylinder is located right above the opening at the upper end of the material bag. The material guiding pipe can be temporarily closed when the bag is replaced, and after the bag replacement is completed, the material guiding pipe is opened again.

The invention belongs to the technical field of fishing devices, and particularly relates to a fishing net closing and opening device, a fishing device and a fishing net control method. A shear fork deformation mechanism is mounted at an opening of a fishing net and is movably connected with a traction mechanism; and the traction mechanism is suitable for controlling the shear fork deformation mechanism to drive the fishing net to close or open. According to the fishing net closing and opening device, the traction mechanism remotely pulls the shear fork deformation mechanism to drive the fishing net to be closed and opened, and the function of remotely and conveniently controlling the opening size of the fishing net can be achieved.