345results about How to "Quick opening and closing" patented technology

A zone isolating and testing apparatus comprising an isolation tool and a downhole flow control means and a method of using such apparatus is disclosed. The zone isolating and testing apparatus is particularly useful for testing zones during reverse circulation drilling using concentric drill string such as concentric drill pipe or concentric coiled tubing. The isolation tool of the zone isolating and testing apparatus comprises an expandable packer means and is adapted to connect to concentric drill string near the drilling means. The downhole flow control means of the zone isolating and testing apparatus comprises two valves, one for closing off the annulus between the inner tube and outer tube of the concentric drill string and the other for closing off the inner space of the inner tube. The downhole flow control means is also adapted to connect to concentric drill string near the drilling means. During testing, the isolation tool seals off the annulus between the concentric drill string and the walls of the wellbore and the downhole flow control means seals off either the annulus between the inner tube and outer tube of the concentric drill string or the inner space of the inner tube of the concentric drill string.

The invention relates to a high-temperature high-pressure temperature-reducing pressure-reducing device capable of being started and stopped rapidly. The device comprises a pneumatic actuating mechanism, a steam mixing pipeline and a pressure-reducing valve, wherein the steam mixing pipeline is connected with a steam inlet and a steam outlet; the pressure-reducing valve is composed of a valve body, a valve plug, a valve seat and an upper valve cover; and a water-supplying temperature-reducing system, a safety protection system and a dewatering system are arranged on the steam mixing pipeline. The device provided by the invention has the beneficial effects that the device is a steam temperature-reducing pressure-reducing system which is connected in parallel with a steam turbine, can introduce steam generated by the boiler to a steam pipeline or a condenser of the next stage pressure and temperature, the device has the functions of rapid starting and stopping, safe overflowing, safe protection and the like, and is mainly applied to industrial fields, such as a thermal power unit, the coal chemical industry and the coal oil.

The invention relates to a pneumatic executor for driving a valve, which comprises a cylinder body, a piston arranged in the cylinder body, a limit mechanism of the piston, end covers arranged at two ends of the cylinder body, a transmission mechanism for connecting the piston and an executor shaft driven by the transmission mechanism, wherein the cylinder body is separated into an inner cavity and an outer cavity by the piston, and the inner cavity and the outer cavity are connected with an air source control valve through an air passage. The pneumatic executor is characterized in that the wall of the inner cavity is provided with a vent hole communicated with the atmosphere, a gap is reserved between the hole position of the inner cavity and the limit position of the piston stroke, the area of the hole is not less than 50 percent of the area of the piston, preferably over 1 percent of the area of the piston, and a control valve is arranged outside the vent hole. The opening-closing of the vent hole control valve and linked control of air connection and disconnection of the inner and outer cavities can realize quick communication among the inner and outer cavities, the air source and the atmosphere so as to quickly open and close a butterfly valve and a ball valve according to a set motion order. The pneumatic executor can be widely applied to a driving process of various valves with large calibers of over 200 millimeters.

The invention provides a long-plunger type dual-barrel coal-dust resistant discharging and extracting pump capable of preventing eccentric wear and coal dust from burying pump, blocking pump and prolonging the pump detection period. The pump consists of a centering body, a pump barrel assembly, a piston assembly, a liquid outlet valve and a liquid inlet valve assembly; a centering locking claw is inserted in a lock sleeve of an upper coupling to realize positioning and sealing of the centering body and avoiding eccentric wear between the plunger and the pump barrel; an internal barrel can prevent the deposited coal dust in the annulus of a bar pipe from entering the gap between the plunger and the pump barrel; the coal dust is dropped back to a tail pipe through the annual cavity between the external barrel and the pump barrel to prevent the coal dust from burying the pump; the structure of the long-plunger short pump barrel can promptly discharge the coal dust in the gap between the plunger and the pump barrel, so as to protect the internal and external working surfaces of the pump barrel and preventing the pump from being blocked; the well liquid stored in the coal-dust resistant tank washes the coal dust in the liquid outlet valve cover and the coal dust deposited at the upper part of the liquid outlet valve through a jet orifice, so as to realize an automatic washing function of the liquid outlet valve and preventing the coal dust from jamming the pump; and a spring is cooperated with a liquid inlet valve ball positioning pin, so that the liquid inlet valve ball can be fast reset, and the pump valve under a low submergence can be realized in smooth on and off.

A zone isolating and testing apparatus comprising an isolation tool and a downhole flow control means and a method of using such apparatus is disclosed. The zone isolating and testing apparatus is particularly useful for testing zones during reverse circulation drilling using concentric drill string such as concentric drill pipe or concentric coiled tubing. The isolation tool of the zone isolating and testing apparatus comprises an expandable packer means and is adapted to connect to concentric drill string near the drilling means and be in fluid communication with the concentric drill string. The downhole flow control means of the zone isolating and testing apparatus comprises at least two valves, one for closing off the annular conduit between the inner tube and outer tube of the concentric drill string and the other for closing off the inner conduit of the inner tube. The downhole flow control means is also adapted to connect to concentric drill string near the drilling means and be in fluid communication with the concentric drill string. During testing, the isolation tool seals off the annular passage between the concentric drill string and the walls of the wellbore and the downhole flow control means seals off either the annular conduit or the inner conduit of the concentric drill string.

The invention discloses a fully sealed composite explosion-proof container comprising an end cover component and a container body. The end cover component is engaged and connected with the container body through a multi-tooth structure, and the end cover component comprises a cover plate of which the lower part is provided with a stainless steel jacket; the stainless steel jacket is internally provided with a high density aluminum foam layer, a separating plate, a low density aluminum foam layer and a spherical film from bottom to top in sequence; and the container body comprises a composite outer layer of which the interior is a metal inner barrel, and the upper part of the metal inner barrel is provided with an annular aluminum foam layer of which the bottom is provided with a separatingplate layer. According to the fully sealed composite explosion-proof container provided by the invention, the barrel is wound by carbon fiber reinforced epoxy resin matrix composites; and the structural strength is high, and the weight is light. The explosion-proof container has the advantages of the simple structure, quick opening and closure, reliable sealing and no fire phenomenon during explosion; the overpressure within the 30cm radius of the opening part is low, and less 20 kPa than the threshold that a human body can bear; and the explosion-proof container is light in weight, and can be handled by one person easily.

The invention relates to a tooth strap, single shaft and guide rod, and groove-shaped cam combined spatial mechanism of a sliding plug door, which relates to an open and close mechanism of sliding plug hermetization of the sliding plug door of a vehicle, in particular to the tooth strap, single shaft and guide rod, and groove-shaped cam combined spatial mechanism of the sliding plug door of a high-speed railway vehicle and other railway vehicles. The tooth strap, single shaft and guide rod, and groove-shaped cam combined spatial mechanism comprises a door frame, a motor, a driving tooth gear, a tooth strap, a load-bearing shaft, a strap clamp, a tensioning device, a bearing seat, a driven tooth gear, a load-bearing shaft sleeve, a connecting rod, a guide rod sleeve, a door carrying guide rod, a roller, a roller shaft, a groove-shaped cam and a door leaf; a tooth strap mechanism comprises the driving tooth gear, the tooth strap, the strap clamp, the tensioning device, the bearing seat and the driven tooth gear, and the strap clamp is fixedly connected with the load-bearing shaft sleeve, the connecting rod and the guide rod sleeve into a whole so as to form a single shaft and guide rod mechanism with the load-bearing shaft, the door carrying guide rod, the door frame and the like; and a groove-shaped cam mechanism comprises the load-bearing shaft, the load-bearing shaft sleeve, the guide rod sleeve, the roller, the roller shaft, the door carrying guide rod, the groove-shaped cam and the door leaf, and the three mechanisms are connected with one another to form the tooth strap, single shaft and guide rod, and groove-shaped cam combined spatial mechanism.

The invention discloses a headspace type vacuum oil sample taking method. The method is based on a headspace type vacuum oil sample taking apparatus. The method comprises the steps of installing an oil taking nozzle on an oil outlet of a transformer sampling valve; unscrewing a protective cylinder from a first oil taking valve connected through threads; sleeving a protective cylinder installation hole onto a prism of an oil taking rod; rotating an operation rod on a side wall of the protective cylinder along a hinge shaft to be parallel to a support board; pushing the operation rod to drive the protective cylinder to rotate; pushing a sealing ball by the oil taking rod so as to enable an oil guide hole of the oil taking rod to communicate with a first oil taking hole; enabling an oil sample to flow into the oil guide hole through the first oil taking valve; taking off the protective cylinder; rotating a handle on a second oil taking valve to open the second oil taking valve; and enabling the oil sample to flow out of an oil outlet nozzle through the second oil taking valve. In the method, the protective cylinder is rotated so as to drive the oil taking rod to rotate, maintenance workers can take the oil sample without carrying tools, so that the oil sampling method is easier, faster and more effort-saving; the oil sample can be taken at a constant speed in a relatively vacuum state through two-level sealing and ball valve control.

The invention discloses a bidirectional sealing gate valve and a using method thereof. The bidirectional sealing gate valve comprises a valve deck, a valve shaft, a valve body, a valve plate, a valveseat, a valve body sealing surface and a valve seat sealing surface, wherein the valve seat is connected to the valve plate through a valve seat gland in a floating mode, an elastic connecting piece is arranged between the inner end face of the valve seat and the valve plate, a gear box cover is fixedly connected to the valve deck, the gear box cover is fixedly connected with a valve shaft gland,the part, located below the gear box cover, of the valve shaft is connected with a center gear in a key mode, the outer edges of the two sides of the center gear are meshed with a left gear and a right gear respectively, the left gear and the right gear are connected with screw rods which penetrate through the valve deck to extend downwards through flat keys respectively, and the tail ends of thescrew rods are rotationally connected with the inner surface of the valve body. The bidirectional sealing gate valve has the beneficial effects that 1, a hand wheel drives the gear, the gear drives the screw rods, the screw rods drive a gate plate, the matching precision is high, and due to the fact that the gate plate is supported at the two ends of the screw rods, the gate plate moves up and down stably; and 2, after the gate plate is closed, the valve seat realizes bidirectional sealing of the gate valve under the double acting force of the spring force and the thrust of a medium on the valve seat.

The invention relates to low-consumption environment-friendly biochar production equipment, which consists of a pedestal, a carbonization furnace, a gas purification device, a draught fan, an exhaust pipeline, a thermometer, a carbonization chamber support, a combustion chamber fixation bracket and a rotary handle. The carbonization furnace is composed of a carbonization chamber and a combustion chamber. The combustion chamber bottom is fixed on the pedestal through the combustion chamber bracket. The upper part of the carbonization chamber is movably fixed on a cross beam, and the carbonization chamber can turn freely and rotate around the cross beam. A set of gear linkage system is fixed on a steel pipe at the front end of the carbonization chamber support to adjust the inclination angle of the carbonization chamber. The carbonization chamber, the exhaust gas purification device and the draught fan are communicated through the exhaust pipeline. The carbonization chamber is internally provided with several independent pyrolysis chambers. While saving energy and protecting the environment, the equipment provided by the invention also can rapidly and effectively pyrolyze biomass into biochar, and utilizes the combustible gas generated by biomass pyrolysis to heat itself.

The invention relates to a hard sealing lifting type brake plug valve and a control method thereof. The hard sealing lifting type brake plug valve comprises a valve body, a valve seat, a valve plug, a valve rod, a gasket, a valve deck, studs, pins, a packing bushing, swing bolts, a packing pressing plate, swing bolts, a hand wheel, a hand wheel gasket, a nut, packing and a valve rod nut. The valve body and the valve deck are connected through the studs. The valve deck and the packing pressing plate are connected through the swing bolts. The valve rod is connected with the valve plug through a head flat-square part. A full-bore partial-rotation structure is adopted, the flow coefficient is large, and the opening and closing space is small. The metal-sealing, fireproof, anti-static and blowout prevention valve rod structure is adopted, and the hard sealing lifting type brake plug valve is suitable for high-temperature-resistant, high-pressure-resistant and strong-corrosion-resistant working conditions and is wide in application range. The packing structure can be replaced on line, and online maintenance is convenient. During operation, a sealing pair is disengaged, friction between opening and closing torque and the sealing pair is reduced, and the service life of the valve is prolonged.

The invention provides a combined type electric hydraulic lifting height limiting portal and relates to road and bridge height limiting facilities. The combined type electric hydraulic lifting height limiting portal comprises two sets of uprights, cross beams capable of being lifted, a height limiting signboard, a strobe lamp, a wireless bridge photographing and recording instrument, a Bluetooth reading head, motors and hydraulic systems. The portal can be opened and closed in electric, manual, Bluetooth, remote control, electronic manners and the like. The two sets of uprights are arranged on the two sides of a lane. Each set of uprights is composed of two parallel uprights spaced at a certain distance, and the two uprights are connected through the corresponding cross beam. Each upright is composed of three parts, wherein the lower part is connected with a ground foundation, the middle part is a middle short joint, and the upper part is an inner pipe which can be lifted and is provided with scale marks. The side of each set of uprights is provided with the corresponding motor and the corresponding hydraulic system. The height of the height limiting portal is adjusted in two directions through the supporting force of hydraulic rods, and after the motors are powered off, the hydraulic systems are controlled through pedals, work is stable, and noise is low. The portal is simple in structure, safe, reliable, high in operability and suitable for various road sections.

The electromagnetic valve comprises the non electromagnetic valve base locating at the utmost bottom of the electromagnetic valve, an air chamber formed at the upper center, guide valve opening and main valve opening from the air chamber to the outside wall, cross section of a valve being T shape and hallow, and the said valve connected with the non electromagnetic valve base through screw, with screw thread at the top, a magnetic valve core being a column, a round hole at the center of its end located at the center hollow part of the valve, a spring at the bottom of the said magnetic valve core and the valve, with the spring cased around the outside wall of the electromagnetic valve core, a Freon glue bar with the same size and shape of the magnetic valve core, putting into the hole of the magnetic valve core, an electromagnetic coil twisted around the outside wall of the valve, an outside shell cased outside of the valve with a round opening at the top, and the size being the same with the top of the magnetic valve and with nut fixed them in between.

The invention relates to a commercial washing machine. The commercial washing machine comprises a coin box, a service port is formed in the coin box, an upper lid used for sealing the service port isarranged at the service port and is connected with the coin box through a bolt, a special-shaped fifth pressing die is arranged on the end face of a nut of the bolt, and/or the periphery of the nut ofthe bolt is in a special shape, so that a screwdriver opens and closes the upper lid by screwing on/off the bolt through the fifth pressing die and/or the periphery of the nut of the bolt. By means of the commercial washing machine, the upper lid is connected with the coin box through the bolt, so that opening and closing of the upper lid are simpler and quicker; meanwhile, by arranging the special-shaped pressing dies on the nut of the bolt, the bolt can be screwed off only by using a matched tool, and the safety of the coin box is guaranteed. Maintenance personnel can conduct correspondingmaintenance and detection simply by using the tool matched with the bolt to screw off the bolt, the safety is guaranteed, and the whole operation is also more convenient. Besides, the commercial washing machine is low in cost and suitable for industrialized production.

The invention discloses a spiral door carrying guide rod groove cam combination space mechanism for a sliding-plug door and relates to a sliding and plug, sealing, opening and closing mechanism for the sliding-plug door of a vehicle, in particular to the spiral door carrying guide rod cam combination space mechanism for the sliding-plug door of high-speed rail or other railway vehicles. The mechanism comprises a motor, a coupler, a screw, a bearing shaft, a coupling rod A, a nut, a coupling rod B, a shaft sleeve, a coupling rod C, a door carrying rod sleeve, a door carrying guide rod, a roller, a roller shaft, a door handle, a groove cam, a door leaf and a door frame, wherein a spiral mechanism consists of the nut, the screw and the door frame; a door carrying guide rod mechanism consists of the nut, the door carrying rod sleeve, and the shaft sleeve which are connected fixedly and integrally through the coupling rod A, the coupling rod B, and the coupling rod C, the bearing shaft, the door carrying guide rod, and the door frame; a groove cam mechanism consists of the door carrying guide rod, the door handle, and the door leaf which are connected fixedly and integrally, and the bearing shaft, the groove cam, the roller shaft, and the roller; and the three mechanisms are connected with one another to form the spiral door carrying guide rod groove cam combination space mechanism for the sliding-plug door.