66results about How to "Improve opening and closing efficiency" patented technology

The invention relates to coal mine gas adsorption control valves and discloses a control valve used on a device for eliminating gas accumulation in a coal mine roadway through cooperation of the mineventilation coal mine gas prevention technology and the gas extraction coal mine gas prevention technology. By adjusting the open-close degree of four sealing moving doors, gas adsorption can be better conducted according to the situation of gas accumulation. The control valve is characterized in that a fixed cylinder is sleeved with one end of a main ring; at least one adsorption block is arranged on the inner wall of the main ring; the other end of the main ring is sleeved with a fixing ring; four through holes are formed in the fixing ring with equal distances; one ends of four supporting frames are arranged on the outer wall of the main ring with equal distances and located under the four through holes in the fixing ring in a one-to-one correspondence mode; each supporting frame is ofan L-shaped structure; arc-shaped grooves are formed in the other ends of the L-shaped supporting frames; supporting plates are arranged in the arc-shaped grooves in the other ends of the supporting frames and are each of an arc-shaped plate structure; and pneumatic actuators are arranged on the supporting plates, and baffles are arranged at one ends of telescopic rods on the pneumatic actuators.

The invention relates to a carton unfolding device of an automatic packaging machine. The carton unfolding device is arranged between a carton warehouse and a carton conveying chain and comprises a carton sucking mechanism and a carton unfolding mechanism, the carton unfolding mechanism comprises a carton pre-unfolding assembly, a carton unfolding assembly and a carton over-unfolding assembly, the carton sucking mechanism comprises a transmission assembly, a vacuum control assembly and three sucking claw assemblies, sucking claws of the sucking claw assemblies perform inner cycloid motion, interference between the sucking claws and other parts is avoided, the sucking claws are controlled in a mechanical mode to grab and place carbons, four carton unfolding motions are carried out on the cartons, the unfolding efficiency is high, the cartons are completely unfolded, and the success rate of follow-up working procedures is improved.

A valve structure includes a valve opening diaphragm and a valve diaphragm. The valve opening diaphragm provides a central valve opening with a plurality of wave shaped projections at the circumference of the valve opening. The valve diaphragm stacks on the valve opening diaphragm and providing at least a pair of elongated circular grooves. The pair of circular grooves is symmetrically disposed with respect to the center of the valve diaphragm and an area enclosed by the pair of circular grooves covers the valve opening.

The invention discloses a power distribution cabinet, and the cabinet comprises a housing. The right side of the inner cavity of the housing is fixedly connected with a fixed plate, and the bottom ofthe left side of the fixed plate is fixedly connected with line concentration plates, wherein the number of line concentration plates is two. The left side of the fixed plate is fixedly connected witha control box located at the tops of the line concentration plates. The left side of the control box is provided with a display screen, and the left side of the front surface of the inner cavity of the housing and the left side of the back surface are respectively in fixed connection with fixed blocks. The sides, far from the inner wall of the housing, of the fixed blocks are provided with sliding grooves. According to the invention, a fan-shaped opening and closing mode of a door is changed into a vertical opening and closing mode, thereby saving a large space, and improving the stability ofopening and closing. Therefore, the door cannot swing or shake freely, thereby bring great convenience to a user for maintaining a low-voltage power distribution cabinet, avoiding the damages causedby the shaking of the door to the body of the user, and guaranteeing the personal safety of the user.

The invention discloses an automatic forming shear pin device for electronic parts and components and a process of the automatic forming shear pin device. The automatic forming shear pin device comprises a rotary disc, at least two sets of jigs, an opening-closing mechanism, a supply mechanism, a loading mechanism, a forming mechanism, a shear pin mechanism and an unloading mechanism, wherein therotary disc is rotatably arranged on a machine table; the jigs are arranged on processing stations of the rotary disc; to-be-processed components and parts are placed in the jigs, and forming blocks are arranged at sides of the components and parts; the opening-closing mechanism is separately arranged below the jigs; the supply material is arranged on the machine table, and extends to one side ofthe rotary disc; the loading mechanism is arranged at one side of the supply mechanism; and the forming mechanism, the shear pin mechanism and the unloading mechanism are arranged on the machine table, and are sequentially arranged on the side part of the rotary disc in a spaced mode in a peripheral direction. The automatic forming shear pin device realizes transmission turning through an inclinedpushing block, utilizes a roller and a guide arc surface to realize linked opening-closing of a pin clamping assembly and an component and part clamping assembly, and effectively improves automationdegree of the forming shear pin for the components and parts, forming shear pin quality and efficiency.

The invention discloses a quick turn-off valve for water pump operation connection. The quick turn-off valve comprises a valve shell, wherein a liquid inlet pipe and a liquid outlet pipe are arrangedon two sides of the valve shell, a first-stage liquid inlet turn-off assembly is arranged in the middle part of the outer wall of the top end of the liquid inlet pipe, the middle part of the outer wall of the top end of the liquid outlet pipe is provided with a first-stage liquid outlet turn-off assembly, and the first-stage liquid outlet turn-off assembly and the first-stage liquid inlet turn-offassembly are the same in structure; three sliding blocks are uniformly distributed in a cylinder hole of the valve shell, a first valve body are coaxially connected between two adjacent sliding blocks, and a second valve body are coaxially connected between two adjacent sliding blocks; and a screw rod is fixedly connected to the top surface of the sliding block positioned above, a threaded section of the screw rod is spirally arranged at a threaded hole in the middle part of the top plate of the valve shell; and a handle is fixedly connected to the top end of the screw rod. The quick turn-offvalve has the advantages that use is rapid, efficient and convenient, water path opening and closing efficiency in the water pump operation can be greatly improved, and the quick turn-off valve is suitable for popularization and application.

The invention provides an automatic-restoration skylight system, and belongs to the technical field of data centers. The automatic-restoration skylight system comprises two cabinet top supporting pieces which are arranged front and back and a plurality of skylights mounted between the two cabinet top supporting pieces in a hinged mode. Two rotary shafts of each skylight separately stretch out of the two cabinet top supporting pieces and deviate from the gravity center of the skylight. Electromagnetic locks are mounted on one cabinet top supporting piece, and the number of the electromagnetic locks is the same as that of the skylights. The electromagnetic locks attract skylight frames of the corresponding skylights. The automatic-restoration skylight system further comprises swing rod assemblies and a push rod mechanism, wherein the swing rod assemblies are fixedly arranged below the front rotary shafts of the corresponding skylights; the push rod mechanism comprises an electric telescopic rod mounted at the left end of the front cabinet top supporting piece, a sliding rod horizontally arranged along the front cabinet top supporting piece, and sliding block assemblies fixedly arranged on the sliding rod; the sliding block assemblies are connected with the corresponding swing rod assemblies through connecting pieces; and the telescopic end of the electric telescopic rod pushes the sliding rod to slide rightwards, and all the swing rod assemblies rotate at the same time. The automatic-restoration skylight system has the advantages of being simple in structure and coordinated in operation.

The invention discloses a flow regulating valve for hydraulic engineering. The flow regulating valve comprises a bottom cover, a valve body, a shut-off assembly and a flow regulating assembly; the bottom cover is rectangular frame-shaped; the valve body is arranged in the bottom cover; connecting flanges are coaxially connected at two ports of the valve body; the shut-off assembly is connected toone end of the valve body; a first runner pipe contained in the shut-off assembly communicates with the valve body; a sealing block is arranged in the first runner pipe; the sealing block is connectedwith a first moving mechanism at the upper end of the first runner pipe; the flow regulating assembly is connected to the other end of the valve body; a second runner pipe contained in the flow regulating assembly communicate with the valve body; a plurality of flow regulating blocks are distributed in the second runner pipe, and the apertures of circular holes in the middle parts of the flow regulating blocks from top to bottom are increased in sequence; the first runner pipe communicate with the second runner pipe through a connecting pipe; a rotating motor is arranged on the bottom cover;a circular valve body is movably arranged in the middle part of the valve body; and the circular valve body is connected with the rotating motor. A waterway can be quickly shut off, the flow can be adjusted, and the use is efficient and quick.

The invention is suitable for the technical field of ball valves, and provides a novel PE sealing ball valve. The novel PE sealing ball valve comprises a valve body, a variable diameter, a valve rod and a valve element; the valve body and the variable diameter are in hot melt welding; the valve element is positioned in accommodating space formed by combining the variable diameter with the valve body; a fixed hole is formed in the valve element; a groove is formed in the fixed hole; multiple first sealing rings are arranged between the valve rod and the valve body; multiple second sealing ringsare arranged between the valve element and the variable diameter; the valve rod is provided with moving space and a limiting groove; a moving rod is arranged in the moving space; matched thread holesare formed in the upper ends of the moving rod and the valve rod; the lower end of the moving rod is a spherical end; a fixed block is arranged in the limiting groove; an elastic piece is arranged between the fixed block and the valve rod; the diameter of the spherical end is larger than the length of the limiting groove; and the fixed block is matched with the groove. The novel PE sealing ball valve can be effectively opened and closed, reduces the damage of the sealing rings, guarantees the tightness thereof, and meanwhile, can effectively adjust the position of the valve rod to prevent random opening and closing thereof.

The invention belongs to the technical field of seedling-culturing net sheds, and particularly provides a net shed for disease-free seedling culturing of citrus reiculata Blanco and murcott. The net shed for disease-free seedling culturing of the citrus reiculata Blanco and the murcott comprises a net shed body, a shading device is arranged above the net shed body, and comprises a support arrangedabove the net shed body, a shading net arranged on the support and a shading-net control device for controlling opening and closing of the shading net; seedling culturing frames are arranged in the net shed body at intervals, and comprise support legs, net plates arranged on the support legs and guard bars arranged on the two sides of the net plates; the seedling culturing frames are arranged onsoil, and water spraying systems are arranged above the seedling culturing frames. According to the net shed, as the shading device and the seedling culturing frames are arranged, the seedling-culturing survival rates of the citrus reiculata Blanco and the murcott can be increased; meanwhile, occurrence of soil borne disease can be reduced, the use quantity of a pesticide is decreased, and growthof nursery stocks is facilitated. In addition, transplant operation is convenient, working efficiency can be improved, and the labor cost is reduced.

The invention discloses a railway vehicle, comprising a car body and a top cover, wherein the top cover comprises two cover plates; the two cover plates are respectively rotatably connected with the car body, so that the two cover plates can be close to each other or far away from each other, so that the top cover can be closed or opened; and the top of the two cover plates are provided with a triggering member; Further comprising an opening and closing assembly respectively cooperating with the two triggers, The opening and closing assembly is directly or indirectly fixed to the ground, and comprises a bracket and a track fixed on the bracket. The distance between the two tracks is gradually changed in the longitudinal direction. When the railway vehicle is traveling, the triggering member can move from the inner end part of the track to the outer end part, and can also move from the outer end part of the track to the inner end part, and the cover plate is driven to rotate to open orclose the top cover. The opening and closing of the top cover are automatically triggered by the running of the railway vehicle without additional driving device, which saves the cost, improves the opening and closing efficiency, simplifies the structure of the railway vehicle, lightens the overall weight of the vehicle, reduces the cost and improves the versatility.

The invention discloses a multifunctional operation platform translation type bearing jacking machine. According to the technical scheme, the multifunctional operation platform translation type bearing jacking machine is characterized in that the multifunctional operation platform translation type bearing jacking machine comprises a frame body, a pushing cylinder, a sliding plate, a fixing plate and tension springs; the frame body is arranged to be in a frame shape; the pushing cylinder is arranged on the top of the frame body; the sliding plate is slidably installed between two vertical supporting rods of the frame body, and the bottom of the pushing cylinder is connected with the sliding plate; the fixing plate is arranged at the bottom of the frame body, and the sliding plate is matchedwith the fixing plate; and the fixing plate comprises a first sliding plate and a second sliding plate which are matched with each other, sliding rods are arranged on the portions, corresponding to the fixing plate, of the two vertical supporting rods of the frame body, the portions, corresponding to the sliding rods, of the first sliding plate and the second sliding plate are provided with sliding holes matched with the corresponding sliding rods, and screw rods on the first sliding plate and the second sliding plate are in screw connection fit with screw holes. According to the multifunctional operation platform translation type bearing jacking machine, operation is easy, the manufacture cost is low, and damage generated in the bearing disassembling process can be avoided.

The invention discloses a penetrating type flat gate valve, and relates to the field of flat gate valves. The penetrating type flat gate valve comprises a valve body, an electric push rod and a connecting sleeve, wherein the valve body and the electric push rod are fixedly connected to the two ends of the connecting sleeve respectively, guide wheels are arranged on the periphery of the inner wallof the connecting sleeve, the guide wheels are slidably connected to the surface of a piston rod of the electric push rod, a guide sleeve is arranged at the inlet position of the valve body, and the surface of the piston rod of the electric push rod is movable sleeved with the guide sleeve. According to the penetrating type flat gate valve, a U-shaped movable frame, a limiting sleeve, a through-flow device, a sealing bearing, a communicating plug ,a through-flow hole and a gear ring are arranged, the problems are solved that for the penetrating type flat gate valve driven by the electric pushrod, the valve body can be opened and closed by the parallel movement of a closing part driven by the electric push rod in the linear direction, the moving stroke of the closing part is long, the usetime is long, and the impact on the gate valve when opening and closing by lifting speed is large is solved under the condition that rapid opening and closing are needed.

The invention discloses a port intelligent defense barrier system and a control method thereof, and relates to the technical field of port electronic protection. The concrete base of the system is set on both sides of the port, the floating door is placed horizontally on the water surface of the port, and one end is fixedly connected to the corresponding concrete base, and the other end is movably connected to the corresponding concrete base; the top of the floating door connection unit on the water is provided with Lifting the winch, the defense net is woven by photoelectric composite cables, the top of which is connected to the floating door on the water, and the bottom is anchored on the seabed through the counterweight anchor chain, and the tension sensor is set on the counterweight anchor chain; the defense net is connected with the The lifting winch is connected; the traction system is set on the top of the concrete base, the movable end of the traction cable of the floating gate traction winch bypasses the traction pulley and connects with the movable end of the floating gate on the water, and the control cabinet is connected with the signal of the traction winch of the floating gate; the control system consists of VTS control center, It consists of a signal generator, a signal analysis and detection device, a signal processing module, a signal receiving device and an alarm system.

The invention provides a medical bedpan mechanism which comprises a bedpan (6), wherein the bedpan (6) is mounted on a bed body; the top of the bedpan (6) is covered by a bedpan cover (7); under the driving of a moving mechanism, the bedpan (6) is moved to a convenient position of a patient from a storing position of the bedpan; a baffle side (11) is arranged on the bedpan cover (7); a baffle plate (9) for baffling the baffle side (11) is arranged on the bed body; a first magnetic sucking module (8) is arranged on the bed body; a second magnetic sucking module (10) for sucking the first magnetic sucking module (8) is arranged on the bedpan cover (7); the bedpan cover (7) is further provided with a ring sleeve (12); and the bedpan (6) is further provided with a hook plate (13) hung with the sleeve ring (12) when the bedpan (6) is moved to the storing position. By adopting the medical bedpan mechanism, not only are automatic opening and closure of the bedpan cover (7) achieved, but also an automatic opening and closing structure is simplified, the cost is lowered, and the space occupied by the opening and closing mechanism is reduced.

The invention provides a device with an air outlet, which comprises a plurality of air deflectors arranged along the circumferential direction and the radial direction of the air outlet; and a drivingassembly connected with the air deflector and used for driving the air deflector to do opening and closing motion and / or do rotating motion around the axis of the air outlet. The device is more attractive in appearance, air is output through the gaps between the air deflectors, air output is more comfortable, the driving assembly can drive the air deflectors to rotate around the axis of the air outlet, 360-degree air supply can be achieved, and air output is more uniform.

The embodiment of the invention discloses a retractable sun shading device which comprises installing grooves symmetrically formed in the two sides of a glass top ceiling, wherein a plurality of auxiliary support frames used for achieving support effects are arranged on the installing grooves; a plurality of shun shading plates are erected between the installing grooves positioned at the two sidesof the glass top ceiling; positioning notches used for fixing the positions of the sun shading plates are formed in the installing grooves; rotating shafts embedded in the positioning notches are arranged at the two sides of the sun shading plates; transmission teeth are arranged on the rotating shafts positioned in the installing grooves; transmission structures engaged and connected with the transmission teeth are arranged in the installing grooves; through the corresponding embedment of the positioning notches formed in the installing grooves and the rotating shafts arranged at the two ends of the sun shading plates, the installing efficiency of the sun shading plates is effectively improved, so that the dismounting and the mounting of the sun shading plates are more convenient and faster; and the problem of mounting and dismounting inconvenience of sun shading curtain cloth caused by manual section-by-section installation of sun shading curtain cloth of an integral structure in the prior art is solved.

The present invention discloses an electromagnetic shielding box which comprises a box body, a circuit board, a sliding rail, a sliding rod, a box door, an electromagnetic switch group, a control rod, a placement box, a placement plate, a connection block group, a telescopic pull rod and a mounting plate, sliding grooves are formed in two sides of the interior of the box body, a wave disturbance device is embedded and fixed on the surface of the circuit board, and the sliding rail is fixed in a mounting frame through a hexagon bolt. The sliding rod penetrates through the two sides of the mounting frame, the sliding rod is fixed into the box body through a sliding groove, the top end and the bottom of the mounting frame are fixedly connected with the top end and the bottom of a damping spring, a second mounting groove is formed in the left side of the box door in a penetrating mode, and an electromagnetic shielding layer is fixedly embedded in the front of the box door; and the right side of the box body is movably connected with the left side of the box body through a hinge, the electromagnetic shielding box is provided with the wave disturbances, and the multiple wave disturbances are used for carrying out wave disturbing processing on electronic equipment in the independent containing boxes, so that wave disturbing signals are increased, and the electromagnetic shielding effect of the whole box body is sequentially improved.

The invention discloses an automatic reset skylight device of a data center computer room. The skylight device comprises a driving device, a first skylight, a rotary shaft, a first turntable and a second turntable; one end of the rotary shaft is fixedly connected with the first skylight; the first turntable and the second turntable are coaxially arranged, the first turntable is rotatably connectedwith the rotary shaft or the second turntable, and the second turntable is fixedly connected with the rotary shaft; the rotary shaft is axially arranged along the second turntable, a stirring columnis arranged on the first turntable, the second turntable is provided with a first through hole or an opening, and at least part of the stirring column is located at the first through hole or the opening; the output end of the driving device is connected with the first turntable; when the first turntable rotates, the stirring column abuts against one side of the first through hole or the opening todrive the second turntable to rotate, the rotary shaft is further driven to rotate, and the rotary shaft rotates to control opening or closing of the first skylight. According to the device, in a mode of cooperation between the turntable and the rotary shaft, the skylight can be automatically opened and closed, the difficulty of opening and closing the skylight is reduced, and the efficiency of opening and closing the skylight is improved.

The invention relates to the technical field of plate rolling technology equipment, in particular to a horizontal type high temperature hydrogen resistance furnace. The horizontal type high temperature hydrogen resistance furnace comprises a heating furnace and a material loading and unloading device. A double-layer furnace top structure is arranged at the top of the heating furnace, and the heating furnace is connected with the material loading and unloading device through a furnace mouth. A furnace door capable of being opened and closed is mounted on the furnace mouth in a sealed mode, descends to the position in front of the furnace mouth from the position above the furnace mouth, and horizontally moves in the axial direction of the furnace mouth to be pressed on the furnace mouth, sothat sealing of the furnace mouth is achieved. On the basis that the heating requirement for heating large-sized tungsten molybdenum plate blanks before rolling are met, the horizontal type high temperature hydrogen resistance furnace can effectively prevent potential safety production dangers such as hidden bearing dangers and untight sealing from occurring.

The invention discloses a high-pressure container opening nozzle structure suitable for rapid opening and closing. The high-pressure container opening nozzle structure comprises a nozzle, a cover plate, a link mechanism and tensioning mechanisms. The nozzle is arranged in a shell opening of a high-pressure container, the inner end face of the nozzle makes contact with the outer surface of the cover plate in a sealed mode, and two U-shaped plates and a handle are fixed to the middle of the outer surface of the cover plate in parallel. The outer sides of the two U-shaped plates are respectively provided with a guiding plate. The centers of the guiding plates and the centers of the U-shaped plates are connected through screws in a rotating mode. The inner surface of the cover plate is connected with the inner wall of a shell through the link mechanism which is movably hinged. The two U-shaped plates on the outer surface of the cover plate press against the outer end face of the nozzle through the two tensioning mechanisms, so that the cover is tightly connected with the nozzle. The high-pressure container opening nozzle structure is easy to assemble and disassemble and high in opening and closing efficiency, self-tensioning sealing can be achieved when internal pressure is high, the position of the cover plate can be controlled freely by the handle, the cover plate can be controlled to be opened and closed freely, and operation is convenient.

The invention provides a carrier conveying mechanism. The carrier conveying mechanism comprises machine frames, a carrier, clamp assemblies and opening and closing assemblies, and belt conveying mechanisms and a guide rail are arranged on the machine frames; pressing block assemblies and sliding blocks are arranged at the bottom of the carrier, the pressing block assemblies are borne on the belt conveying mechanisms, and the sliding blocks are slidably arranged on the guide rail; each clamp assembly comprises a clamp bottom plate, a clamp pressing plate assembly, a first rotating shaft, a gearand a rack, the clamp bottom plates are installed on the carrier, the clamp pressing plate assemblies are rotationally connected with the clamp bottom plates through the first rotating shafts, the first rotating shafts are sleeved with the gears, one ends of the racks are movably arranged in the clamp bottom plates, and each rack is meshed with the corresponding gear; and the opening and closingassemblies are arranged on the racks, each opening and closing assembly comprises an opening and closing driving mechanism and an opening and closing pushing part, each opening and closing driving mechanism is connected with the corresponding opening and closing pushing part, and the opening and closing driving mechanisms drive the opening and closing pushing parts to push the racks so as to drivethe gears and the first rotating shafts to rotate, so that the clamp pressing plate assemblies rotate relative to the clamp bottom plates to be opened or pressed.

The invention relates to a closed ammonia adding device for water supply in a chemical water furnace. The device comprises a chemical water furnace, an ammonia water tank, a liquid ammonia storage tank and a water storage tank, the liquid ammonia storage tank is connected with the ammonia water tank through a first pipeline, the water storage tank is connected with the ammonia water tank through a second pipeline, the ammonia water tank is provided with an ammonia water outlet pipe connected with the chemical water furnace, and the ammonia water outlet pipe is provided with a metering valve. A metering pump is arranged on the ammonia water outlet pipe, a first switch valve and a second switch valve are arranged on the first pipeline and the second pipeline respectively, meters are arranged on the first pipeline and the second pipeline respectively, and valve rods of the first switch valve and the second switch valve are provided with a first driven gear and a second driven gear respectively. A driving mechanism for driving the first driven gear and the second driven gear to rotate in the same direction or opposite directions is arranged between the first switch valve and the second switch valve. According to the ammonia adding device, liquid ammonia and water are converted into ammonia water in the closed container, closed feeding of the ammonia water is achieved, and harm to the environment and health of workers caused by volatile ammonia gas is reduced.

The invention relates to the technical field of electroplating production lines, and discloses a tank cover of a plating tank and an electroplating production line. The tank cover of the plating tank comprises a first supporting plate, a second supporting plate, a main shaft, an auxiliary shaft, a driving piece and roller shutters, and the first supporting plate and the second supporting plate are oppositely arranged on the two sides of the opening end of the plating tank in the length direction. The two ends of the main shaft are rotationally arranged on the first sides, in the width direction of the plating tank, of the first supporting plate and the second supporting plate correspondingly. The two ends of the auxiliary shaft are rotationally arranged on the second sides, in the width direction of the plating tank, of the first supporting plate and the second supporting plate correspondingly. The main shaft and the auxiliary shaft are in transmission connection and have opposite rotation directions. The driving piece is in transmission connection with the main shaft. The fixed ends of the two roller shutters are respectively wound on the main shaft and the auxiliary shaft. When the main shaft and the auxiliary shaft rotate synchronously, the free ends of the two roller shutters abut against each other or are far away from each other, so that the opening end of the plating tank is blocked or opened. The tank cover of the plating tank is designed in a split mode, opening and closing are flexible, and the opening and closing efficiency is improved.

The invention relates to a rotary opening and closing device for an end cover of a container. The rotary opening and closing device comprises a supporting stand column, a rotating arm, a driving device, a driving cylinder and a connecting rod, wherein the container is fixedly connected with the lower end of the supporting stand column, and one end of the rotating arm and the upper end of the supporting stand column form rotatable connection; the driving device is used for driving the rotating arm to enable the rotating arm rotate around a vertical rotating shaft; and the driving cylinder is fixed at the other end of the rotating arm, the upper end of the connecting rod and the lower end of a piston rod of the driving cylinder form a rotatable connection, and the connecting rod and the piston rod are both vertically arranged, the connecting rod can rotate around the vertical rotating shaft, and the lower end of the connecting rod is hinged to the center of the top of the end cover. Thelifting rotary opening and closing device can reduce labor intensity during operation, reduce potential safety hazards and improve opening and closing efficiency when opening and closing the end cover.

The invention provides a ship and a construction method thereof. The ship includes a deck, two opposite side bulkheads, rails and a crane; the side bulkheads are erected below the deck and are enclosed with the deck to form a cargo hold; at least one side bulkhead has a hatch; the rails are installed on the deck The lower surface of the tank extends between the two side bulkheads and corresponds to the position of the hatch; the crane is installed on the track and can move along the track so as to be accommodated in the cargo hold or extend out of the cargo hold through the hatch; The working range of the crane covers the cargo hold. The construction method includes: prefabricating the deck sub-section and the track segment respectively, wherein the track segment contains a track; assembling the track segment to the deck sub-section and welding and fixing it to form a deck segment with a track; The crane is installed on the track of the deck section to form the first hull section; the first hull section is hoisted and closed to other hull sections. The ship of the invention can improve the efficiency of cargo transmission, and the construction method can reduce construction difficulty.

The invention discloses a quick turn-off valve for water pump operation connection. The quick turn-off valve comprises a valve shell, wherein a liquid inlet pipe and a liquid outlet pipe are arrangedon two sides of the valve shell, a first-stage liquid inlet turn-off assembly is arranged in the middle part of the outer wall of the top end of the liquid inlet pipe, the middle part of the outer wall of the top end of the liquid outlet pipe is provided with a first-stage liquid outlet turn-off assembly, and the first-stage liquid outlet turn-off assembly and the first-stage liquid inlet turn-offassembly are the same in structure; three sliding blocks are uniformly distributed in a cylinder hole of the valve shell, a first valve body are coaxially connected between two adjacent sliding blocks, and a second valve body are coaxially connected between two adjacent sliding blocks; and a screw rod is fixedly connected to the top surface of the sliding block positioned above, a threaded section of the screw rod is spirally arranged at a threaded hole in the middle part of the top plate of the valve shell; and a handle is fixedly connected to the top end of the screw rod. The quick turn-offvalve has the advantages that use is rapid, efficient and convenient, water path opening and closing efficiency in the water pump operation can be greatly improved, and the quick turn-off valve is suitable for popularization and application.

The invention discloses a high-pressure container opening nozzle structure suitable for rapid opening and closing. The high-pressure container opening nozzle structure comprises a nozzle, a cover plate, a link mechanism and tensioning mechanisms. The nozzle is arranged in a shell opening of a high-pressure container, the inner end face of the nozzle makes contact with the outer surface of the cover plate in a sealed mode, and two U-shaped plates and a handle are fixed to the middle of the outer surface of the cover plate in parallel. The outer sides of the two U-shaped plates are respectively provided with a guiding plate. The centers of the guiding plates and the centers of the U-shaped plates are connected through screws in a rotating mode. The inner surface of the cover plate is connected with the inner wall of a shell through the link mechanism which is movably hinged. The two U-shaped plates on the outer surface of the cover plate press against the outer end face of the nozzle through the two tensioning mechanisms, so that the cover is tightly connected with the nozzle. The high-pressure container opening nozzle structure is easy to assemble and disassemble and high in opening and closing efficiency, self-tensioning sealing can be achieved when internal pressure is high, the position of the cover plate can be controlled freely by the handle, the cover plate can be controlled to be opened and closed freely, and operation is convenient.