177results about How to "Self-sealing" patented technology

The invention discloses a multicomponent alloy composite anticorrosive coating for a metal pipe/pipe fitting, which comprises a Zn-Al-Mg-RE multicomponent alloy layer and a hole-sealing finishing layer, wherein the hole-sealing finishing layer is coated on the surface of the Zn-Al-Mg-RE multicomponent alloy layer, the Zn-Al-Mg-RE multicomponent alloy layer comprises the following components by weight percentage: 56-83% of Zn, 16-41% of Al, 0.05-2.0% of Mg and 0.05-1.0% of Re, and the hole sealing finishing layer is an organic or inorganic coating layer. The multicomponent alloy composite anticorrosive coating disclosed by the invention has the advantages of low porosity, good anticorrosive property and the like.

The invention discloses a gas fuel constant volume combustion chamber capable of being internally installed with a diaphragm plate, belonging to the combustion field of internal combustion engines. The combustion chamber comprises a body (1), the diaphragm plate (27), a front end cover (44) and a window (46) and the like, and the inner part of the gas fuel constant volume combustion chamber is in a cube shape. The inner wall of the body (1) is provided with N pairs of diaphragm plate slots (63); the diaphragm plate is arranged in one pair of diaphragm plate slots; and the diaphragm plate is provided with holes or slots. When the diaphragm plate is not added, the combustion chamber is an ignition needle center ignition combustion chamber; when the diaphragm plate is added, the body (1) is divided into an upper combustion chamber and a lower combustion chamber thereby; the center at the upper part of the body (1) is provided with an ignition plug (2); and the center at the bottom of the body (1) is provided with an ignition plug type pressure sensor (7). When the built-in diaphragm plate is not adopted, the invention can be used for studying streamline flow combustion characteristics of gas fuel; when the built-in diaphragm plate is adopted, the upper combustion chamber (29) is used for the combustion study of spark ignition; and the lower combustion chamber (32) is used for the study of compression ignition or ignition or flame slit quenching effect.

The invention discloses an isolating switch. In the isolating switch, a moving main contact is formed by annular contact fingers which are fixed in a conducting tube or contact fingers which are annularly distributed in the circumferential direction of the conducting tube; a moving arc contact is a contact rod which penetrates into the inner ring of the moving main contact movably and extends front and back, the front end of the contact rod is provided with an arc striking disc, and the rear end of the contact rod is provided with a guide rod segment which is located behind the moving main contact and movably assembled on a guide frame fixed to the inner wall of a guide rod in a front-and-back guide mode; the guide frame is provided with a front supporting wall and a rear supporting wall, the guide rod segment penetrates through the front supporting wall and the rear supporting wall, and the front supporting wall and the rear supporting wall are arranged front and back in a spaced mode; a convex stop shoulder stopped by the front supporting wall is arranged on the periphery of the guide rod segment in a convex mode, and a return spring arranged on the periphery of the guide rod segment in a sleeving mode is arranged between the convex stop shoulder and the rear supporting wall in an abutting mode. In the opening state, part or whole of a forward opening will be sealed by the arc striking disc, so that debris in an outer space is less likely to fall onto the moving main contact through the forward opening of the moving main contact, and the moving main contact is less likely to be corroded by the surroundings in the opening state.

The invention relates to a pretightening sealing ball valve device which comprises a ball valve lower body, a spring, a sealing metal body, a sealing ring, a ball valve, a rack, a gear, hydraulic transfer tubes, a ball valve upper body and tightening screw nails. The ball valve lower body is connected with the ball valve upper body through the tightening screw nails; the ball valve upper body and the ball valve lower body are provided with circular holes for assembling the rack and the gear; the spring is arranged below the ball valve lower body; the sealing metal body and the ball valve are arranged inside the ball valve lower body and positioned above the spring; carbon materials are laid on the surfaces of the sealing metal body and the ball valve; the gear is connected with the ball valve through interlocking teeth; the rack is meshed with the gear through teeth, and fixed on the ball valve upper body and the ball valve lower body through the hydraulic transfer tubes at two ends; and when the ball valve is required to work, the hydraulic transfer tubes transfer liquid so as to exert a force on the rack, so that the rack rotates the gear, and the gear drives the ball valve to rotate to lead the ball valve to be in a closing mode. As the spring is arranged below the ball valve, the ball valve has self-tightness, thereby ensuring the tightness of the ball valve to be more reliable, and improving the feasibility of the operation.

The invention provides a liquid storage device for a dosing machine. The liquid storage device comprises a liquid storage cavity, a storage cover and a hollow storage base. The bottom end of the storage cavity is connected with the top end of the storage cover. The hollow storage base is fixed to the dosing machine. A first sealing structure is arranged at the bottom end of the storage cover. A second sealing structure is arranged at the top end of the storage base. The storage cover is placed on the storage base after being provided with the storage cavity, and the liquid storage device is sealed by depending on self-sealing of the first sealing structure and the second sealing structure. The storage cavity with the storage cover can be placed into the storage base in any direction to achieve self-sealing, the assembling and disassembling mode is simple and convenient, the principle is ingenious, cost is low, and the sealing effect is stable and reliable. The invention further provides the storage cover which can be connected with the storage cavity of the dosing machine in a matched mode, and the self-sealing function of the storage cavity and the storage base is achieved.

The invention discloses a pipe airtightness detecting worktable. The worktable comprises an inflation device, a high-pressure auxiliary tank, a detecting device, a first pipe member airtight pressurepositioning device, and a second pipe member airtight pressure positioning device; the detecting device is provided with a first air outlet pipe; the high pressure auxiliary tank is connected to the airing device through a second air inlet pipe; the high-pressure auxiliary tank is further provided with a second air outlet pipe, and the first air outlet pipe and the second air outlet pipe are connected to the main air intake pipe through a three-way pipe; the main intake pipe is connected to the first pipe member airtight pressure positioning device, and the other end of the first pipe member airtight pressure positioning device is connected with a pipe member. The other end of the pipe member is connected with the second pipe member airtight pressure positioning device, and the other end of the second pipe member airtight pressure positioning device is connected with a main air outlet pipe; the worktable controls the high-pressure auxiliary tank and the detecting device to pressurize the pipe member through the electromagnetic valve, thereby reducing the time for detecting the pipe fitting and improving the working efficiency.

The invention discloses a cord thread integral winding reinforced rubber air spring. The cord thread integral winding reinforced rubber air spring comprises upper and lower flanges, and a bag body integrally vulcanized with upper and lower pressing rings; the upper flange is connected with an upper cover plate by an upper fastening piece; the lower flange is connected with a lower cover plate by alower fastening piece; the upper and lower pressing rings are arranged between the bag body and the upper and lower cover plates; a constraint flange connected with the upper cover plate sleeves thebag body; the bag body consists of an inner rubber layer, a skeleton layer and an outer rubber layer; the inner rubber layer is integrally vulcanized with the upper and lower flanges; the outer rubberlayer is integrally vulcanized with the upper and lower pressing rings; and cord threads in the skeleton layer perform the cross netty winding on the inner rubber layer and the upper and lower flanges to form a net-structured cord thread layer capable of integrally bonding the upper and lower flanges.

The invention belongs to the technical field of casting material treatment equipment and particularly discloses an incoming and outgoing sand roasting device which comprises a furnace body and is characterized by further comprising a sand inlet and outlet structure; the sand inlet and outlet structure comprises a sealed tank, a sand level control portion and a discharge portion and is arranged onthe side wall of the furnace body; the upper part of the sealed tank is provided with a sand inlet; the lower part of the sealed tank is provided with a sand outlet; the sealed tank is communicated with the furnace body through the sand inlet; the sand outlet is communicated with the discharge portion; and the sand level control portion can control discharge of the discharge portion. The device can realize sealing and automatic sand incoming and outgoing while sands go in and out.

The invention provides a self-sealing nitrogen circulating cooling method which comprises the following steps: a. nitrogen discharged after oxygen generation through the absorption oxygen-generation technology in a steel plant is delivered to a blower header pipe through a pressure pump and a delivery pipeline, and the nitrogen in the blower header pipe is mixed with a recycle gas after recovery of heat; b. after pressure is applied to the mixed gas by a blast blower, the mixed gas is delivered to an air inlet pipe of a cooler, enters a material layer zone of a self-cooler through the air inlet pipe, and then is output through a large flue after heat exchange with a high temperature mass at the temperature of 1000 DEGC; and c. the temperature of waste gas in the large flue reaches up to 500-600 DEG C, and then is reduced to 180-230 DEG C after recovery of heat, and the waste gas is again led to the blower header pipe as a recycle gas for mixed cycle utilization with supplementary nitrogen. The technology can realize continuity, stability, recovery of high temperature waste gas and metallization rate of products in production, meet the national policy requirements for energy conservation, emission reduction and cyclic economy, and provide space for reducing production cost.

The invention discloses a full-wedge structure anti-explosion container which comprises a barrel and a flange arranged at the top of the barrel; a check ring in a circular shape is formed at the lower part of the internal wall of the flange in bulged manner; a wedge clamping groove in a circular shape is formed in the middle of the internal wall of the flange in hollowed manner; a cover plate is placed horizontally on the upper surface of the check ring of the flange; a first wedge strip, a second wedge strip and a third wedge strip are arranged at the edge of the upper surface of the cover plate; the first wedge strip, the second wedge strip and the third wedge strip are sequentially connected end to end to form a zero-clearance wedge ring; the first wedge strip, the second wedge strip and the third wedge strip are each provided with a wedge clamping block; the zero-clearance wedge ring is externally matched with a plurality of pressing blocks; the pressing blocks are fixed to the internal wall of the upper part of the flange through screws; and all the pressing blocks, under the pressing force of the screws provide the wedge matching pressing force to the various wedge clamping blocks of the zero-clearance wedge ring. Under the action of the pressing force, self sealing of the zero-clearance wedge ring can be realized, and the full-wedge structure anti-explosion container especially has good effects on limiting the leakage of an explosion product and protecting explosion shock.

The invention belongs to changing and feeding joint devices of a fluid medium and specifically relates to a rapid changing and feeding joint mechanism of the fluid medium between two separation parts when gas and liquid fluid media are in a butt joint state. The rapid changing and feeding joint mechanism is characterized in that a plurality of joints combined by male and female joints are distributed in a butt connection surface between a part A and a part B, each joint combined by the male and female joints is a seal joint which is automatically and integrally formed by pushing each self-sealing male joint into each self-sealing female joint, each self-sealing male joint is composed of a male casing, a guide ring, a guide sleeve, a piston, a thread blocking sleeve, a spring A, a seal ring and a blocking ring, and each self-sealing female joint is composed of a female casing, a sleeve, an ejector rod, a spring B and a seal ring. The rapid changing and feeding joint mechanism has the advantages that the design is reasonable, the structure is compact, besides, the mechanism is self-sealing, free of leakage and convenient to manufacture and install, the operation is safe and reliable, and the like.

The invention discloses a preparation method of a self-sealing planar solid oxide fuel cell, wherein the preparation method comprises the following steps: (1) processing a metal connecting pole having a gas passageway structure; (2) allowing a porous metal layer and the metal connection pole to form a whole; (3) trimming the upper surface of the whole formed by the porous metal layer and the metal connection pole, to obtain a surface for spraying; (4) preparing an anode layer on the surface of the porous metal layer by a spraying method; (5) preparing an electrolyte layer on the surface of the anode layer by a spraying method; and (6) preparing a cathode layer on the surface of the electrolyte layer by a spraying method. Because the battery connecting pole and the porous stainless steel substrate are subjected to edge sealing treatment in advance, the self-sealing effect is realized after preparation of a battery is completed, and the problem of the sealing of the battery is effectively overcome.

The invention discloses a self-sealing type low-rank coal and coal slime negative pressure drying device. The self-sealing type low-rank coal and coal slime negative pressure drying device comprises a spiral feeder, a drying barrel and a spiral discharger which are connected in sequence in a matched manner, wherein the spiral feeder is provided with a feeding opening; the spiral discharger is provided with a material outlet; spiral blades in the spiral feeder and the spiral discharger are fixedly connected with a central hot air pipe; coal scrapers achieving stirring and loosening effects are uniformly arranged around the inner wall of the drying barrel at equal intervals; heat exchange pipes for supplying heat needed by coal drying are arranged in the drying barrel; the spiral discharger is provided with a vapor discharging opening; the vapor discharging opening is connected with a dust collection device through a vacuum pump. The negative pressure drying device is ingenious in structural design; by the use of a spiral extruder type structure, continuous feeding and continuous discharging of coal are realized, and a self-sealing state of the drying device is achieved; due to the adoption of an indirect heating mode, the device has the advantages of preventing high-temperature spontaneous combustion and avoiding explosion; furthermore, water in a coal material can be further removed efficiently and quickly.

The invention provides an injection and molding typed multipurpose shaft seal without shutdown, belonging to the shaft end sealing technical field. The structure of the invention comprises a sealing body in first grade or higher than the first grade; the sealing body in each grade is internally provided with an injection molding hole; the end of the injection molding hole is communicated with the a cirque sealing chamber which is enclosed by the sealing body and a rotation shaft; the two sides of the cirque sealing chamber are provided with a packing chamber; corresponding sealing grease, sealing paste, sealing liquid or solid sealing material can be selectively injected into the injection molding hole according to different sealing parts, pressure and medium, thus preventing the internal and external leakage of the shaft seal. Compared with the prior art, the injection and molding typed multipurpose shaft seal without shutdown of the invention can be widely applied to the shaft end sealing of various rotation equipments in positive pressure and negative pressure, such as steam turbine, generator, water pump, fan, gearbox, etc., and can also be combined with the traditional seals, such as labyrinth seal, packing seal, mechanical seal, magnetic seal, etc. The invention can realize the overall sealing between the sealing body and the shaft, between the sealing body and a sealing sleeve, and between the sealing sleeve and the equipment. The invention can be suitable for the shaft seal of the equipment which is not concentric with the shaft. The sealing body and the sealing sleeve can be made into taper, thus realizing self sealing.