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1306results about How to "Improves sealing reliability" patented technology

Continuous oil pipe hanger for velocity tubular column

The invention relates to a continuous oil pipe hanger for a velocity tubular column. The continuous oil pipe hanger comprises a continuous oil pipe, an I-shaped flange, an upper slip assembly, a lower slip assembly, an upper shell, a middle shell and a lower shell, wherein vertically penetrating central holes are formed in the upper shell, the middle shell and the lower shell; the I-shaped flange is fixedly arranged at the top of the upper shell; the continuous oil pipe passes through the I-shaped flange and the central holes of the upper shell, the middle shell and the lower shell in turn; the upper slip assembly is clamped on an inner wall of the central hole of the upper shell; the lower slip assembly is located in the central hole of the middle shell; a connecting pipe sealing set is fixedly arranged on an inner wall of the central hole of the middle shell and the lower side of a hanging supporting sleeve; at least one pair of driving pistons is arranged on the inner walls of the central holes of the middle shell and the lower shell and under the connecting pipe sealing set; an upper oil port and a lower oil port respectively communicated with the driving pistons are arranged on the side walls of the middle shell and the lower shell. The continuous oil pipe hanger has the beneficial effect of capability of hanging the continuous oil pipe.
Owner:JEREH ENERGY SERVICES

Sealing material for plastic liquid crystal display cells

An object of the invention is to provide a sealant composition for a plastic liquid crystal display cell that is capable of being applied to a sheet heat press adhesion method and of producing a plastic liquid crystal display cell having high reliability under a high temperature and high humidity environment. A two-component sealant composition for a plastic liquid crystal display cell of the invention contains the following components (1) to (6): (1) from 15 to 84% by weight of a liquid epoxy resin having from 1.7 to 6 in weight average of epoxy groups in one molecule and an ionic conductivity of an aqueous solution obtained by extraction separation by contact mixing with 10 times by weight of pure water at from 40 to 80° C. of 2 mS/m or less, (2A) from 10 to 50% by weight of a curing agent containing one or a mixture of two or more selected from (2A-1) a tetrafunctional mercapto compound or (2A-2) a modified polymercapto derivative, having an ionic conductivity of an aqueous solution obtained by extraction separation by contact mixing with 10 times by weight of pure water at from 40 to 80° C. of 0.6 mS/m or less, (3) from 0.01 to 15% by weight of a curing accelerator, (4) from 5 to 50% by weight of an inorganic filler, (5) from 0.1 to 5% by weight of a silane coupling agent, and (6) from 1 to 25% by weight of rubbery polymer fine particles having a softening temperature of 0° C. or less and an average particle diameter of primary particles of from 0.01 to 5 mum.
Owner:MITSUI CHEM INC

Sealing connection method of metal and glass of novel medium-high temperature solar energy heat collection pipe

The invention discloses a sealing connection method of metal and glass of a novel medium-high temperature solar energy heat collection pipe, which relates to a method for matched sealing connection of two materials: the metal of kovar alloy and the glass of neutral borosilicate glass with the similar thermal expansion coefficients. The invention provides a novel method for manufacturing the metal glass medium-high temperature solar energy heat collection pipe. In the method, the difference of the thermal expansion coefficient of the kovar alloy and the thermal expansion coefficient of the neutral borosilicate glass is in a range between 5 percent and 10 percent, the difference of the thermal expansion coefficient of the transition section glass and the thermal expansion coefficient of the neutral borosilicate glass is in a range between 5 and 10 percent, the sealing connection temperature of the neutral borosilicate glass and the transition section glass is between 600 and 1000 DEG C, the heating temperature of the sealing connection region of the kovar alloy and the transition section glass is between 600 and 1200 DEG C, the length of the sealing connection opening is between 3 and 8 mm, and the whole sealing connection section of the neutral borosilicate glass, the transition section glass and the kovar alloy after the sealing connection carries out the annealing processing at the annealing temperature between 450 and 600 DEG C for 10 to 60 minutes.
Owner:北京天瑞星光热技术有限公司

Sealing method for split type magnetic liquid sealing device

A sealing method for split type magnetic liquid sealing device belongs to the field of mechanical engineering sealing, and solves the problems that as the present large-diameter magnetic liquid rotation sealing device applies sealant at the jointed surface of a two-flap structure, the redundant sealant is extruded out after installation and remains on pole teeth at the inner circles of pole shoes, and uneven application influences the sealing performance at the same time. The sealing method is realized as follows: a stainless steel sheet is heated and kept at a temperature between 300 DEG C and 35 DEG C; the stainless steel sheet is stuck into a clearance between a sealing shaft and the pole teeth of the pole shoes; the stainless steel starts from a point at the jointed clearance between two half-pole shoes, and moves along the circumferences of the half-pole shoes to return the start point, so that the sealant extruded from the jointed surfaces of the pole shoes is vaporized; the thickness of the stainless steel sheet is smaller than the clearance between the sealing shaft and the pole teeth of the pole shoes, so as to enable the stainless steel sheet to stick into the clearance; a medical injector is used for sucking magnetic liquid at the jointed clearance between the two half-casings of the split type magnetic liquid sealing device, and the injector starts from a point at the jointed clearance, and continuously injects the magnetic liquid along the circumferences till returning the start point.
Owner:BEIJING JIAOTONG UNIV

Long-acting CO2 gas-injecting pipe column and operation method thereof

The invention discloses a long-acting CO2 gas-injecting pipe column and an operation method thereof. The long-acting CO2 gas-injecting column comprises an upper pipe column and a lower pipe column. The upper pipe column comprises an oil pipe which is arranged in a sleeve pipe in a sleeving mode. The oil pipe is provided with a circulating well-washing sliding sleeve, a hydraulic anchor, a ring-hanging device and a sealing inserting pipe in sequence from top to bottom. The lower pipe column comprises a sealing drum and a packer which are arranged on the oil pipe in sequence. The bottom of the lower pipe column is provided with a setting ball base and a double-grade check valve. The lower pipe column is fixed to the inner wall of the sleeve pipe through an anchor tile of the packer. Closing during water injecting can be achieved through the circulating well-washing sliding sleeve, and opening during backwashing can be achieved. According to the long-acting CO2 gas-injecting pipe column, the structure is simple, packing can be more reliable through the permanent packer, a down-hole well-closing function can be achieved through the multi-functional setting ball base, and down-hole well-closing can be more reliable through the double-grade check valve; through the circulating well-washing sliding sleeve and under the condition without moving pipe columns, the sliding sleeve can be started only through annular pressing, the operation of replacing annular protecting fluid can be conducted, the operation is more convenient and easy, and the cost is saved; and through the ring-hanging device, corrosion situations of pipe columns can further be monitored.
Owner:PETROCHINA CO LTD

LNG ultra-low temperature top-mounting type ball valve seat capable of achieving pre-tightening force fine tuning and on-line disassembling

The invention discloses an LNG ultra-low temperature top-mounting type ball valve seat capable of achieving pre-tightening force fine tuning and on-line disassembling. The LNG ultra-low temperature top-mounting type ball valve seat is characterized in that valve seat bearings are symmetrically arranged at the position, located on the upstream side and the downstream side of a valve element ball, in a valve body, and a locating pin is arranged between the end faces of the tails of the valve seat bearings and the front end face of a valve seat fixing ring; a valve seat sealing ring is embedded in twisting edges of the front ends of the valve seat bearings; valve seat pressing rings matched with the valve seat bearings in a threaded mode are arranged on the peripheries of the valve seat bearings, pre-tightening compressed springs are arranged between the tails of the valve seat pressing rings and the valve body, and the valve seat bearings can move in the axis direction by rotating the valve seat pressing rings. The LNG ultra-low temperature top-mounting type ball valve seat can be suitable for meeting requirements of LNG actual using conditions, the requirements for on-line maintenance, automatic decompression of a middle cavity in time and safe and reliable sealing performance are met, and quality and safety of LNG projects are guaranteed.
Owner:HEFEI GENERAL MACHINERY RES INST
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