47results about How to "Reduce inertial impact force" patented technology

The invention provides a coal-gangue separation system and a separation method. The coal-gangue separation system is mainly formed by a flow-dividing device, a dual-vision identification device, a control device and mechanical arm gripping devices. The flow-dividing device is provided with multiple stages of adjustable flow-dividing baffle plates; through reasonably flow-dividing a coal-gangue flow, the approximate positions of coal and gangues can be determined, and the positioning and control cost is reduced; the dual-vision identification device adopts infrared thermal imaging identification and gray degree identification, and data parameters obtained through sampling are transmitted to the control module, so that the difficulty in identification and positioning is reduced, and the identification rate is improved; through two different identification ways, the evitable phenomena such as missing and wrong choosing are reduced; and a PLC (Programmable Logic Controller) is adopted to control three-degree-of-freedom mechanical arms to follow-up grip, and two-claw manipulators are arranged in fixed runners, so that the identification efficiency and the gripping efficiency of the coal and the gangues are higher, the control method is simpler, and an inertial impact force of the coal-gangue flow caused by excessive speed is reduced during a follow-up process.

The invention discloses a magnetic fluid elevator, comprising an elevator car. The magnetic fluid elevator is provided with a magnetic fluid lifting device which is connected with the elevator car; the magnetic fluid lifting device consists of a magnetic fluid container, a floating body, an electromagnetic coil, a braking device and a controller; the apparent density of a magnetic fluid is controlled by controlling magnetic flux of the electromagnetic coil by using the controller, so that the change of the buoyancy force of the floating body in the magnetic fluid is controlled, the lifting of the floating body is controlled by controlling the change of the buoyancy force, and the elevator car is driven to stably lift by using the floating body; when the buoyancy force is controlled to be equal to or close to the gravity, the stable stopping of the elevator is implemented, the inertial impact force of operation and braking is reduced and the safe braking of the elevator is carried out by using the braking device.

In order to solve the technical problem that after a working roller of a temper mill is replaced, the roller surface of the working roller is damaged in the machine frame closing process, the invention provides a method of controlling the temper mill. The temper mill comprises a machine frame and an electro-hydraulic servo system. The machine frame comprises an upper roller system and a lower roller system, and the electro-hydraulic servo system controls the machine frame to be opened and closed. The electro-hydraulic servo system comprises a PID controller which adjusts the servo threshold opening degree of the electro-hydraulic servo system. In the rolling force control stage of the process that the electro-hydraulic servo system controls the lower roller system to upwards move to closethe machine frame, the PID controller adjusts the output amplitude limiting value coefficient Umax, the amplitude limiting is conducted on the servo threshold opening degree, the inertia impact forcewhich is generated when rollers make contact with strip steel in the closing process of the temper mill is reduced, the phenomenon that the damage to the roller surface of the new working roller exists in the closing process is avoided, and therefore the defect of transverse roller marks which appear on the surface of the strip steel in the vehicle starting production process is overcome, and thesurface quality of the strip steel is improved.

The invention discloses a vertical vibration isolation device. The vertical vibration isolation device mainly comprises an upper connecting plate, an adaptive stiffness unit, slidable oblique rectangular compression spring units and a lower connecting plate. The adaptive stiffness unit is mainly composed of a positioning loading ring, a belleville spring and a pre-compressed rectangular spring, wherein the positioning loading ring and the belleville spring work in parallel to provide vertical negative stiffness, the pre-compressed rectangular spring provides vertical positive stiffness, and the positioning loading ring, the belleville spring and the pre-compressed rectangular spring work together to generate adaptive stiffness; and the slidable oblique rectangular compression spring unitsare each composed of a directional linear guide rail, an oblique rectangular compression spring and a universal joint, vertical sliding blocks move down along the directional linear guide rails to cause axial compression deformation of the oblique rectangular springs, and energy is dissipated through the mutual conversion of elastic potential energy and kinetic energy. The adaptive stiffness unitand the slidable oblique rectangular compression spring units work in parallel, collaboratively deform and jointly achieve vertical vibration isolation. The vertical vibration isolation device can bewidely applied to buildings or large and medium-sized mechanical equipment with high requirements for vibration reduction and near rail transit.

The invention provides a cold box for transporting bananas in summer. The cold box comprises a heat preservation box body used for containing bananas, an eccentric gravity supporting mechanism used for supporting the bananas, a self-adaptive banana containing mechanism used for containing the bananas and a wet and cold heat dissipation mechanism used for conducting cold preservation and heat dissipation. The eccentric gravity supporting mechanism is arranged in the heat preservation box body, and the self-adaptive banana containing mechanism is arranged on the eccentric gravity supporting mechanism. The invention relates to the field of banana transportation. According to the cold box for transporting the bananas in summer, a unique special structure for cold insulation, moisture preservation and collision prevention of the bananas is designed according to the problems that bananas swing and impact in the transporting process and the stacking, extruding and ventilating effects are poorat present, and therefore the problems that when bananas are transported through a common cold chain, the bananas get close to one another, ventilation is poor among the bananas, the bananas are prone to damage due to mutual extrusion and collision, the damaged bananas easily cause gradual deterioration of the surrounding bananas, and the bananas are seriously damaged in the transportation process are solved.

The invention discloses an automotive safety seat backrest which comprises a backrest connecting seat. A backrest bracket is connected to the backrest connecting seat through an angle adjusting device, a swing frame is arranged in the middle of the front of the backrest bracket, and the lower end of the swing frame is hinged to the backrest bracket, a sliding frame is arranged in the backrest bracket, and multiple groups of tension springs are symmetrically arranged between the sliding frame and a bottom beam of the backrest bracket. A guide wheel is arranged in the middle of the upper end of the backrest bracket, a rotary shaft is arranged in the middle of the sliding frame and at the upper end of the swing frame respectively, and a sliding frame pull belt is arranged between the two rotary shafts. A safety belt connecting seat is arranged on the swing frame, a safety helmet connecting belt and a main safety belt are connected to the safety belt connecting seat through a long shaft, and the safety helmet connecting belt is not provided with a top-free safety helmet. The automotive safety seat backrest has the advantages that an inertia impact force of a passenger can be effectively buffered during automotive collision, the passenger is actively and effectively protected, an existing automotive safeguard device can be completely replaced, safety performance is high, and the automotive safety seat backrest is wide in application scope and can be used by adults and children.

The invention provides a barrier free safety revolution door which comprises a fixed leaf, a movable leaf, an actuating device and a control device. The barrier free safety revolution door is characterized in that the movable leaf is composed of an arc door flap. The barrier free safety revolution door only utilizes the arc door flap to form the movable leaf to reduce the weight and the inertial impact force of the movable leaf, and the rotational speed of the movable leaf in the rotation is a non-uniform speed to enable the movable leaf to quickly stop when the movable leaf touches people or enters a danger region, so that the safety factor is improved. Meanwhile, the rotation door is simple in structure, low in production cost and high in safety factor due to the fact that a radial door flap or an extension case is omitted.

The invention discloses a circular ash removing method suitable for a fluidized bed boiler, and belongs to the technical field of ash removal of boiler equipment. The circular ash removing method suitable for the fluidized bed boiler comprises a sand loading step and a recycling step, and is characterized in that in the sand loading step, sand is loaded in a sand hopper of a circular sand ash blower; in a sand blasting step, the sand in the sand hopper is placed in a sandblast, and is sprayed in a shaft at the tail by the sandblast; in the recycling step, after scouring a superheater, an economizer and an air pre-heater, the sand sprayed in the shaft at the tail flows into a fluidized bed of the circular sand ash blower, and is recycled via an auger connected to the fluidized bed; and in a sand lifting step, the sand recycled by the auger is elevated and moves to a position above the sand hopper through an electric hoist, and is discharged into the sand hopper through a sand discharging trolley to form a circular ash removal cycle. By the circular ash removing method suitable for the fluidized bed boiler, the sand can be circularly used to remove ash on a heat exchange component in the shaft at the tail, the heat exchange efficiency is improved, and boiler steam rate is increased. The circular ash removing method suitable for the fluidized bed boiler has the features of low energy consumption and good ash removal effect.

The invention discloses a circulating sand dust blowing device, and belongs to the technical field of boiler dust removing equipment. The circulating sand dust blowing device comprises a sand hopper and an electric hoist connected to a boiler top. The circulating sand dust blowing device is characterized in that a sand blower connected to the top of a tail vertical well and a fluidized bed connected to the bottom of the tail vertical well are further included; the sand blower comprises a speed regulation motor, a belt wheel, a transmission belt, a sand blowing pipe and a bearing connected to the sand blowing pipe; the sand hopper is connected with the sand blowing pipe through a sand inlet pipe; a motor shaft of the speed regulation motor is in transmission connection with the belt wheel; the belt wheel is in transmission connection with the bearing through the transmission belt; the sand blowing pipe communicates with the tail vertical well; a packaging auger driven through a motor is connected to the fluidized bed; and a sand discharge trolley is connected to the electric hoist. According to the circulating sand dust blowing device, dust on a heat exchange component in the tail vertical well can be effectively removed, heat exchange efficiency is improved, and the circulating sand dust blowing device has the beneficial effects of being low in energy consumption, good in dust blowing effect and high in use safety.

The invention provides a coal-gangue separation system and a separation method. The coal-gangue separation system is mainly formed by a flow-dividing device, a dual-vision identification device, a control device and mechanical arm gripping devices. The flow-dividing device is provided with multiple stages of adjustable flow-dividing baffle plates; through reasonably flow-dividing a coal-gangue flow, the approximate positions of coal and gangues can be determined, and the positioning and control cost is reduced; the dual-vision identification device adopts infrared thermal imaging identification and gray degree identification, and data parameters obtained through sampling are transmitted to the control module, so that the difficulty in identification and positioning is reduced, and the identification rate is improved; through two different identification ways, the evitable phenomena such as missing and wrong choosing are reduced; and a PLC (Programmable Logic Controller) is adopted to control three-degree-of-freedom mechanical arms to follow-up grip, and two-claw manipulators are arranged in fixed runners, so that the identification efficiency and the gripping efficiency of the coal and the gangues are higher, the control method is simpler, and an inertial impact force of the coal-gangue flow caused by excessive speed is reduced during a follow-up process.

The invention discloses a three-dimensional shock / vibration isolation device with sliding oblique springs. The three-dimensional shock / vibration isolation device with the sliding oblique springs is formed by a horizontal shock / vibration isolation unit and a vertical shock / vibration isolation unit which are connected in series in the up and down direction. The horizontal shock / vibration isolation unit is a thin laminated rubber bearing with a large first shape coefficient and contains a high-purity lead core energy consumption unit. The vertical shock / vibration isolation unit is formed by connecting a thick laminated rubber bearing with a small first shape coefficient and oblique rectangular compression springs connected with vertical heavy-load linear guide rails in parallel, vertical shock / vibration is isolated together through elastic deformation of low hardness and high damping rubber and tension and compression deformation of the oblique rectangular springs linked with the linear guide rails, the first shape coefficient of the thick laminated rubber bearing and the stiffness coefficient of the rectangular springs can also be changed, vertical vibration at different frequencies and amplitudes is reduced, and three-dimensional shock / vibration isolation is realized. The three-dimensional shock / vibration isolation device with the sliding oblique springs belongs to a passive shock / vibration control measure and can be widely applied in shock isolation layers of upper cover structures of urban rail transit and the bottoms of important large and medium-sizedmechanical equipment.

The invention discloses an ice-resistant structure of a single column foundation. The ice-resistant structure comprises a single column, a large diameter column, a plurality of ice-resistant pieces, afirst suction barrel foundation, a plurality of second suction barrel foundations, a shaft sleeve, a plurality of spring rods and a plurality of stability-enhancing floating barrels, wherein the first suction barrel foundation is arranged at the bottom end of the single column; the large diameter column is arranged at the upper end of the single column; the plurality of ice-resistant pieces are uniformly distributed in the periphery of the large diameter column; the ice-resistant pieces are connected to the periphery of the large diameter column; the ice-resistant edge, far from the large diameter column, of each of the ice-resistant pieces is composed of two concave arc-shaped sections; rhombic shock absorbing holes are formed in the main body of each ice-resistant edge; the shaft sleeveis arranged on the single column concentrically and is separately connected to the plurality of second suction barrel foundations uniformly distributed in the periphery of the first suction barrel foundation through the spring rods; and the plurality of stability-enhancing floating barrels are uniformly distributed in the periphery of the single column and are connected to the single column through arms of force. The ice-resistant structure disclosed by the invention is simple and novel in structure, and the impact force of sea ice to a petroleum platform can be reduced effectively.

The present invention is double sealing mechanism for stepped closing valve. The double sealing mechanism includes valve rod, slowly closing valve plate, slowly closing soft sealing, slowly closing hard sealing, small press plate, fast closing valve plate, fast closing soft sealing, fast closing hard sealing, large press plate, fast closing soft sealing plane, fast closing hard sealing plane, valve seat, valve body, etc. The slowly closing soft sealing and the small press plate are screwed on slowly closing valve plate, and all the slowly closing valve plate, the slowly closing soft sealing and the small press plate are screwed on the valve rod. The slowly closing hard sealing is welded on the slowly closing valve plate. The fast closing soft sealing is installed on the fast closing valve plate, and the large press plate to press the fast closing soft sealing is screwed to the fast closing valve plate. The valve seat is screwed to the valve body. The present invention has reliable sealing and long service life.

A gear box for locmotive is composed of an upper cap, a lower cap and a joint part. The upper and lower caps are made up of 2-3 mm thick steel plate through cold and hot stretching several times. Their peripheral edges have the reinforcing rib formed by cold pressing several times. The circular or shaped reinforcing ribs are also made at the positions where local reinforcing is needed. Its advantages are reduced thickness of steel plate, no welded seam, high strength, and light weight.

The invention provides a combined integrated fuel tank. The combined integrated fuel tank includes a fuel tank body; the fuel tank body is divided into four chambers through three non-porous partition plates, and the four chambers are a first chamber, a second chamber, a third chamber and a fourth chamber. The first chamber is a urea chamber, the second chamber is a heating chamber, the third chamber is formed into a fuel tank, and the fourth chamber is formed into an auxiliary fuel tank. Inlets and outlets are formed in all the chambers, and a porous partition plate is arranged in the center of the third chamber fuel tank to divide the third chamber fuel tank into several communicated spaces. A fuel amount change-over valve is connected with the position between the third chamber and the fourth chamber through pipes. By means of the combined integrated fuel tank, different functions are achieved through a plurality of the chambers, an independent urea tank and mounting support are canceled, the whole car cost is reduced, and the chassis space is saved; by means of the auxiliary fuel tank, the chassis space is saved, and the fuel tank fuel loading amount is increased; the auxiliary fuel tank is added, so that the car fuel injection efficiency is reduced, and time is saved.

The invention relates to the technical field of bicycles, in particular to a safe and comfortable electric bicycle which comprises a bicycle body. A corresponding seat main rod is installed on the bicycle body, an installation box is fixedly installed on the seat main rod, the installation box is located below a seat, and a guide seat is fixedly installed on the outer side of the installation box.A protection mechanism is mounted at one end of the guide seat; the protection mechanism comprises a sliding rod, a fixed seat, a protection plate, two protection rods and a buffer pad; one end of the sliding rod penetrates through the guide seat and is slidably connected with the guide seat, the other end of the sliding rod is fixed to the fixed seat, the top end of the fixed seat is rotatably connected with the protection plate through a hinge, the two protection rods are fixedly installed at the two ends of the top of the protection plate respectively, and the protection plate is fixedly installed on the inner side of the protection plate. Inertia force can be effectively relieved during emergency braking, and the safety of a rider is guaranteed.

The invention discloses a buffering device for controlling the movement speed of an actuator cylinder. The reliability of a locking device mechanism can be improved. The buffering device is achieved through the following technical scheme that an upper locking cavity is communicated with a damping pipe, and an intercepting ring groove is formed in the circumference of a sliding section of the damping pipe; when a piston rod extends downwards, hydraulic oil enters a blind hole cavity of the piston rod along the damping pipe, after the blind hole cavity is filled with the hydraulic oil, the hydraulic oil slowly flows upwards into the upper locking cavity along the intercepting ring groove in the damping pipe, the hydraulic pressure of the upper locking cavity is slowly increased, and the piston rod is pushed to move under the action of the hydraulic pressure; when the piston rod retracts, pressure of the unlocking cavity extrudes the piston rod, the piston rod extrudes the hydraulic oil in the upper locking cavity, the pressure of the upper locking cavity is increased, the hydraulic oil slowly flows into the blind hole cavity of the piston rod from the upper locking cavity along an intercepting annular groove of the damping pipe, the hydraulic oil in the unlocking cavity is reduced, and the piston rod slowly slides along the damping pipe; and liquid flow generates damping force through a gap between the inner wall of a blind hole and the damping pipe, the damping force controls the movement speed of the piston rod, and buffering of the actuator cylinder is achieved.

The invention is used in ultra high- voltage or extreme high -voltage power line network. A folded connecting lever is mounted on the power output shaft of gearbox. There is a moving contact on the top of the folded connecting lever.

The invention discloses a hydraulic oil cylinder based on decompression and force reduction, and belongs to the field of hydraulic equipment. The hydraulic oil cylinder based on decompression and force reduction comprises a hydraulic oil cylinder body, wherein an oil storage chamber is dug in the hydraulic oil cylinder body; a telescopic port is dug in the right end of the hydraulic oil cylinder body and communicates with an oil storage chamber; a piston is slidably connected into the oil storage chamber; through arranging a decompression piece, an inertia impact force between the piston and the hydraulic oil cylinder body when the piston moves to the maximum stroke can be reduced, so that the phenomenon that the hydraulic oil cylinder body is damaged under a long-time impact effect of thepiston is not easy to occur, and the working stability of a hydraulic system is further improved; and meanwhile, through the matched use between a fastening frame and an arc-shaped limiting plate, the piston rod stopped after moving to a certain position is positioned and clamped, so that when the phenomenon that a hydraulic oil pipe is damaged or the oil cylinder is poor in sealing performance in the use process of the hydraulic oil cylinder body occurs, the piston rod is not easy to fall back, and the use safety of the hydraulic oil cylinder body is improved.

The invention provides a light tube positioning device and a backlight module using the positioning device for holding the light tube. The positioning device comprises an upper branch part and a lower branch part, wherein, a holding mouth is formed between the upper branch part and the lower branch part for holding the light tube. Besides, at least one of the upper branch part and the lower branch part is elastic to offer buffer effect to the light tube and reduce the inertia impact on and the cracking possibility of the light tube.

The invention discloses an anti-collision and anti-vibration unmanned aerial vehicle, which includes a body, the left and right ends of the two sides of the body are fixedly connected with connecting plates, the adjacent two connecting plates are rotatably connected with the same first rotating shaft, and the first First rotating plates are movably socketed on the left and right ends of a rotating shaft, and second rotating plates are provided on opposite sides of two adjacent first rotating plates, and both second rotating plates are movably socketed on the first rotating shaft. In the present invention, the first rotating shaft is covered with the first rotating plate and the second rotating plate, and the three are connected to each other through the first torsion spring, the second torsion spring, and the third torsion spring at the same time, so that the first rotating plate, the second rotating When the rotating plate is impacted, it has a certain elastic deformation ability to avoid direct damage to the body; the elastic rotating plates on both sides of the body are connected as a whole by means of an elastic sleeve, so that the outer side of the body is wrapped in the elastic device frame, so that Avoid direct contact with the ground when the body lands, buffer a certain amount of inertial impact force, and improve the service life of the body.

The invention provides a wood chipping rotor for a wood chipper, which includes a mounting frame, blades are arranged on the outside of the mounting frame, the mounting frame and the blades are combined to form a blast impeller, and the mounting frames are two or more , the included angles between two adjacent mounting frames are the same, the mounting frame is provided with rib partitions, the rib partitions are located between two adjacent mounting frames, and there are several rib partitions. The wood chipping rotor integrates the cutter head, cutter head and blower device into one, and becomes a wood chipping rotor. The intuitive impression can be considered that there is no traditional cutter head setting, which reduces the size of the wood chipper and is easy to move. It is very suitable for home use. The crushed wood rotor adopts an integrated structure, which has high strength, is not easy to deform, and has a long service life. While not reducing the crushing power, it reduces the inertial impact force, low noise, and high safety.

The invention discloses an automotive safety seat backrest which comprises a backrest connecting seat. A backrest bracket is connected to the backrest connecting seat through an angle adjusting device, a swing frame is arranged in the middle of the front of the backrest bracket, and the lower end of the swing frame is hinged to the backrest bracket, a sliding frame is arranged in the backrest bracket, and multiple groups of tension springs are symmetrically arranged between the sliding frame and a bottom beam of the backrest bracket. A guide wheel is arranged in the middle of the upper end of the backrest bracket, a rotary shaft is arranged in the middle of the sliding frame and at the upper end of the swing frame respectively, and a sliding frame pull belt is arranged between the two rotary shafts. A safety belt connecting seat is arranged on the swing frame, a safety helmet connecting belt and a main safety belt are connected to the safety belt connecting seat through a long shaft, and the safety helmet connecting belt is not provided with a top-free safety helmet. The automotive safety seat backrest has the advantages that an inertia impact force of a passenger can be effectively buffered during automotive collision, the passenger is actively and effectively protected, an existing automotive safeguard device can be completely replaced, safety performance is high, and the automotive safety seat backrest is wide in application scope and can be used by adults and children.

The invention provides a light tube positioning device and a backlight module using the positioning device for holding the light tube. The positioning device comprises an upper branch part and a lower branch part, wherein, a holding mouth is formed between the upper branch part and the lower branch part for holding the light tube. Besides, at least one of the upper branch part and the lower branch part is elastic to offer buffer effect to the light tube and reduce the inertia impact on and the cracking possibility of the light tube.

The invention discloses a full-automatic sintered brick setting machine. The full-automatic sintered brick setting machine is characterized in that a chuck plate and a rotating device are fixedly connected; cylinders are fixed to a telescopic rack; telescopic rods are connected with piston rods of the cylinders; clamping plates penetrate through the telescopic rods; the cylinders communicate with gas storage tanks through gas distributing tubes; the gas inlet ends of the gas distributing tubes are connected with gas pressure regulators; an opposite type photoelectric sensor, an inductive sensor and a magnetic sensor are electrically connected with a main engine; a lifting part is composed of a servo motor, a driving chain wheel, a first fixed pulley, a second fixed pulley, a chain and a driven chain wheel; the servo motor, the driving chain wheel and the first fixed pulley are all arranged on a traveling device; the second fixed pulley is arranged at the end of a cross beam of a machine frame; the driven chain wheel is arranged on the rotating device; and the driving wheel is driven through a stepping motor arranged on a first rack plate. According to the full-automatic sintered brick setting machine, integrated operation of clamping, conveying and stacking of green bricks is achieved through the main engine; and the stacking quality and efficiency of the green bricks are greatly improved.

A walking mechanical leg based on Menneimasi pendulum arm is disclosed. The Menneimasi pendulum arm doing reciprocating swining along ellipse trace is hinged to the fixed point of pantograph. The reducing point sliding in the slot on said arm and the dual-parallelogram reversing mechanism are combined to realize telescopic control, pace regualtino, clutch and self-locking. The condyle joint of pantograph is linked to leg mechanism.

The invention discloses a hydraulic oil cylinder based on decompression and force reduction, and belongs to the field of hydraulic equipment. The hydraulic oil cylinder based on decompression and force reduction comprises a hydraulic oil cylinder body, wherein an oil storage chamber is dug in the hydraulic oil cylinder body; a telescopic port is dug in the right end of the hydraulic oil cylinder body and communicates with an oil storage chamber; a piston is slidably connected into the oil storage chamber; through arranging a decompression piece, an inertia impact force between the piston and the hydraulic oil cylinder body when the piston moves to the maximum stroke can be reduced, so that the phenomenon that the hydraulic oil cylinder body is damaged under a long-time impact effect of thepiston is not easy to occur, and the working stability of a hydraulic system is further improved; and meanwhile, through the matched use between a fastening frame and an arc-shaped limiting plate, the piston rod stopped after moving to a certain position is positioned and clamped, so that when the phenomenon that a hydraulic oil pipe is damaged or the oil cylinder is poor in sealing performance in the use process of the hydraulic oil cylinder body occurs, the piston rod is not easy to fall back, and the use safety of the hydraulic oil cylinder body is improved.

The present invention is double sealing mechanism for stepped closing valve. The double sealing mechanism includes valve rod, slowly closing valve plate, slowly closing soft sealing, slowly closing hard sealing, small press plate, fast closing valve plate, fast closing soft sealing, fast closing hard sealing, large press plate, fast closing soft sealing plane, fast closing hard sealing plane, valve seat, valve body, etc. The slowly closing soft sealing and the small press plate are screwed on slowly closing valve plate, and all the slowly closing valve plate, the slowly closing soft sealing and the small press plate are screwed on the valve rod. The slowly closing hard sealing is welded on the slowly closing valve plate. The fast closing soft sealing is installed on the fast closing valve plate, and the large press plate to press the fast closing soft sealing is screwed to the fast closing valve plate. The valve seat is screwed to the valve body. The present invention has reliable sealing and long service life.

The invention provides a container for transporting steel coils. The container comprises a container with a front end wall, a rear end wall and a bottom frame. The container is characterized in that asupport is arranged on the bottom frame, a plurality of grooves for containing the steel coils are formed in the support, the grooves are arc surfaces which are connected with a plurality of sectionsof arcs with different curvatures or a plurality of folding lines; opening slots are formed in the front end and the rear end of the grooves, a row of stop rods which are in series connection with pin shafts are installed below the position of the open slots; and the center distances between the stop rods in the front row and in the rear row are about the average widths of the steel coils to be transported. Due to the dead weight, one ends of the stop rods extend upwards out of the inner surfaces of the grooves through the opening slots, the other ends of the steel coils are located below thegrooves, and when the transported steel coils press the extending stop rods, the stop rods rotate, the extension ends of the stop rods are hidden in the grooves, and the rest rods which are not pressed are extended out of the two ends of the steel coils, so that the axial positioning is carried out on the two ends of the steel coils. The container is convenient and reliable to locate, and suitable for transporting the steel coils with different diameters and widths.