200 results about "Fusible alloy" patented technology

Apparatus and method for plugging perforations in an oil or gas well. A bridge plug is formed in the casing below the perforations. A heating tool and a fusible alloy adjacent the heating tool is lowered into the well to a position above the bridge plug and adjacent the perforations. Heat is applied to melt the fusible alloy and pressure is applied to the molten material to force it through the perforations. The heating operation is terminated to allow the molten material to solidify and plug the perforations.

The invention is a nano-particulate demulsifying agent used in demulsification of trinary oil recovery produced fluid. The application of new technique of trinary oil recovery enhances the crude oil recovery, where the polymer injection oil-recovery technique increases the oil, obviously, but also causes the difficulty in demulsifying the produced fluid at the same time. Its character lies in that: the nano-particulate demulsifying agent is composed of particle nucleating material which processes the surface of nano silicon oxide material by silane coupler and fluorine compound and reacting solvent containing arenes as dimethylbenzene, as well as polyether demulsifying agent as multicomponent polyether, amine polyether and resin polyether. It effectively solve the problem about the demulsification of trinary oil recovery polymer injection produced fluid, field used quantity little, demulsifying speed rapid, dehydrating efficiency high and oil-water interface regular.

Quantity of flux coated on fusible alloy of a thermal fuse disclosed can be inspected accurately by an image processing method. The thermal fuse comprises:

• • (a) first insulation film 11 coupled with a pair of metal terminals 12;
  • (b) fusible alloy 13 coupled between ends of the metal terminals 12, being placed above first insulation film 11;
  • (c) flux 14 coated on fusible alloy 13; and
  • (d) second insulation film 15 disposed on first insulation film 11 so that an internal space is formed, being placed above fusible alloy 13,
  • wherein at least either of first insulation film 11 or second insulation film 15 is transparent or translucent, and flux 14 has the Gardner color scale from 4 to 16.

An automatic fire extinguisher that is self-activated in the presence of specified temperature. The fire extinguisher includes a sealed pressure vessel having a fitting and a tube permitting access to the contents of the pressure vessel. A valve in the end of the tube includes a fusible alloy temperature sensor designed to melt or soften in the presence of heat and/or flame. Once the temperature sensor softens or melts, the contents of the pressure vessel are released through the valve thereby extinguishing the fire. A capillary tube is provided to charge the pressure vessel with fire suppressant agent and a pressurized gas.

A thermal fuse comprises: a first insulating film to which a pair of metal terminals are attached; a fusible alloy located above the first insulating film and connected between the leading end portions of the pair of metal terminals; and a second insulating film located above the fusible alloy and attached to the first insulating film so as to define a space with the first insulating film. The fusible alloy includes an Sn—Bi—In—Zn alloy containing 0.5 to 15 weight % of Bi, 45 to 55 weight % of In and 0.5 to 5 weight % of Zn with the balance being Sn.

A thermal fuse includes a first insulation film having a pair of metal terminals mounted thereto, a fusible alloy located over the first insulation film and connected between respective ends of the metal terminals, a second insulation film provided over the fusible alloy and bonded to the first insulation film as to provide a space between the first and second insulation films. The fusible alloy includes an Sn—Bi—In alloy containing 20 to 39.5 wt. % of tin, 11.5 to 31 wt. % of bismuth, and 49 to 68.5 wt. % of indium. The fusible alloy does not release lead or cadmium even after being disposed of since it contains no lead and no cadmium.

The thermal fuse of the present invention contains a fuse element 1 that is formed of a fusible alloy having a composition of 43.5-50 wt % Sn, 0.1-5 wt % In, and balance being Bi and inevitable impurities, or a fusible alloy having a composition of 5-33 wt % In, 4.7-15.5 wt % Zn, and balance being Sn and inevitable impurities; a pair of electric terminals 2, 3 connected to the fuse element; and case 8 for accommodating at least the fuse element 1. The opening end of case 8 has a predetermined shape. By employing the structure above, a thermal fuse having an operating temperature as high as 130-190° C. can be easily obtained.

Capacitive probe measuring the level, in a vessel and with high precision, of the interface between a conducting fluid (F1) and a non-conducting fluid (a gas or oil for example), suited to work under high pressure and high temperature conditions. The probe comprises a preferably tubular insulating layer (3) made of a dielectric heat-resisting material (a metal oxide such as zirconia or alumina) baked at a high temperature, with a first face in contact with conducting fluid (Fl) and an opposite face in contact with a second electrode (4), consisting for example of a coating or of a layer made of a fusible alloy deposited on the opposite face of insulant (3), selected according to the temperature range within which the capacitive probe is intended to work, or possibly of an added tube. Alloys based on zinc, tin, copper, etc, can for example be used. A second capacitor of the same type used for temperature compensation of the first one can be placed within the tubular insulating layer. Its capacitance is for example of the order of 1 nF. The probe can be applied in laboratory apparatuses working under high pressure and high temperature conditions, notably in petrophysical test cells.

A thin thermal fuse is provided with a rush current resistance performance so as to be usable also as a current fuse. In a thermal fuse in which a low-melting fusible alloy piece 2 having an alloy composition containing 40 to 70% Bi is connected between a pair of flat lead conductors 1, 1, a flux 4 is applied to the low-melting fusible alloy piece 2, and the piece is sandwiched between a resin base film 31 and a resin cover film 32 to provide insulation, the resistance of the low-melting fusible alloy piece 2 is set so as to enable the low-melting fusible alloy piece 2 to be fused off also by Joule heat due to an allowable maximum current of a secondary battery.

An over-current protective device is characterized by comprising: a fuse cover, a fusible body disposed therein, and a first electrode and a second electrode respectively extending from the two ends of the fusible body. A method for fabricating the over-current protective device comprises the following steps: stamping a conductive metal sheet to form a frame with a base having two ends respectively extending as a supporting plate, and soldering a fusible unit containing the fusible body between the supporting plates; disposing the frame having the soldered fusible unit into a mold, putting a polymeric material into the mold for covering the fusible body and the supporting plates, and molding the fusible body into a required shape; taking out the frame covered by the polymeric material and cutting the base off so as to obtain an over-current protective device having two electrode plates extending from two ends thereof.

A fuse unit comprising a resin housing formed by insulator, a circuit body formed by conductor, molded integrally with the resin housing and branching and transferring electricity from a power source side to a load side, and a fusible body provided on the circuit body and fusing at overcurrent to the load side; the circuit body is formed by a block side circuit body connected to the power source side, and a block side terminal body connected to the load side, a block side first connection end to which one side of the fusible body is detachably connected is formed on the block side circuit body, and a block side second connection end to which the other side of the fusible body is detachably connected is formed on the block side terminal body.

The invention relates to a valve for compressed gas collecting bottle and a concentrating pneumatic control method thereof. The valve comprises an end cover 1, a connecting sleeve 2, a piston 3, a pressure spring 4, a conical valve core 5, a valve main body 6, a safety screw plug 7, a reset spring 11 and an emergent manual switch component, wherein the reset spring 11, conical valve core 5, the connecting sleeve 2, the pressure spring 4, the piston 3, and the end cover 1 are orderly assembled in the upright cavity of the valve main body 6, from up to down. The safety screw plug 7 of a fusing alloy plug 8 in a side hole is assembled in a left inner hole of the valve main body 6. The emergent manual switch component which comprises a cushion 12, a screw rod 13 and a screw sleeve is assembled in a right inner hole of the valve main body 6 through the screw sleeve 14. The invention can increase the charging/discharging efficiency, relives the labor intensity and is reliable to use. The valve is reasonably designed, the structure is simple and compact, the pneumatic control is utilized, the abrasion is small and the service life is long.

The invention discloses a fluxing agent as well as a preparation method and application thereof. The fluxing agent comprises the following components in percentage by weight: 60-80 percent of rosin, 2-20 percent of organic acid and 10-30 percent of octadecanamide. The fluxing agent can be applied to temperature fuse elements to promote the fusing of a fusible ally wire. Compared with the prior art, the fluxing agent does not contain halogen and accords with the development tendency of environment protection. When applied to temperature fuse, the fluxing agent can achieve the effect of using a fluxing agent containing halogen.

A high-voltage direct-current thermal fuse comprising a high-voltage low-current thermal fuse connected to a high-voltage direct-current circuit. The high-voltage low-current thermal fuse comprises a casing, fusible alloy wires, wherein the fusible alloy wires are connected between the two leads. One of the leads is sequentially sleeved with an arc extinguishing sleeve and a spring. One end of the arc extinguishing sleeve is in contact with the fusible alloy wires; and the other end of the arc extinguishing sleeve is in contact with the spring. One end of the spring is connected to the inner end face of the casing; and the spring is in a compressed state. The high-voltage direct-current thermal fuse further comprises a conventional thermal fuse; or further comprises a current. The high-voltage direct-current thermal fuse solves the problem of timely arc cutting-off and can be directly applied to a high-voltage direct-current circuit.

The invention relates to a thermal fuse for electronic circuit protection, in particular to a thermal fuse for lithium-ion battery protection, and a manufacturing method thereof. The thermal fuse comprises a plastic backing film; a pair of metal electrodes are arranged above the backing film; the metal electrodes are relatively linearly arranged and are provided with space among the end parts; the metal electrodes are welded through fusible alloy; wherein, the surface of the fusible alloy is covered with cosolvent which is coated by a layer of adhesive; the adhesive and the backing film form a closed space; the end parts of the metal electrodes, the fusible alloy and the cosolvent are sealed in the closed space; or, the surface of the fusible alloy is covered with cosolvent, and the backing film at the external side of the cosolvent is provided with an annular upper cover piece; the cosolvent is coated with a layer of adhesive; the adhesive, the upper cover piece and the backing film form a closed space; and the end parts of the metal electrodes, the fusible alloy and the cosolvent are sealed in the closed space.

The invention relates to a preparation technique of a novel self-lubricating iron-based coating coupling. The preparation technique consists of the following steps: 1. the preparation of the iron-based spraying and welding coating adopts iron-based self-fusible alloy powder as the material, and an iron-based alloy coating is prepared on a general coupling surface via the spraying and re-fusion techniques; 2. the sprayed and welded coupling surface is polished to make sure that the width of the coating surface ranges from 0.25mm- 0.60mm and the roughness is no more than Ra0.8Mum; 3. sulfurization of low temperature ion on the surface: the ion undertakes the spraying and coupling process in a low temperature ion sulfurization oven with a voltage of 800-1000 volt, an atmospheric pressure of 20-50Pa and a temperature of about 300 DEG C for about eight hours. A protective layer of the butter is smeared on the coupling surface to prevent the oxidation of the surface. The preparation technique is characterized by low cost and easy operation. And the self-lubricating iron-based alloy spraying and welding oil-sucker rod coupling acquired from the preparation technique has better wear resistance and self-lubrication quality, with a long service life.

The invention relates to a medium forming method for improving the forming property of thick-wall metal pipe fittings. The method comprises the following steps: S1, preparing composite medium, namely, granular medium is uniformly mixed with fusible alloy under molten state, wherein the melting point of the fusible alloy is lower than the melting temperatures of a tube blank and the granular medium; S2, filling composite medium, namely, a fluid-shaped composite medium is filled in a hollow tube blank and then cooled until the composite medium is solidified; S3, forming pipe fittings; and S4, taking out the granular medium, namely, the solidified fusible alloy in a pipe is converted into molten fusible alloy, so that the molten fusible alloy drives the granular medium to be separated from the pipe fittings. The invention overcomes the defects that when the traditional rigid mould method is used for thick-wall metal pipe fitting forming, good forming quality is hard to achieve, avoids multi-step molding of metal pipe fittings, greatly saves the die cost, shortens the production period, and achieves the purpose of environmental-friendly and rapid production.

The invention discloses a temperature controller which comprises an insulating system, a contact switch and a safety switch. The insulating system comprises a plurality of insulators. The contact switch is connected with the insulating system, and comprises a movable contact piece and a fixed contact piece, wherein the movable contact piece can be conductively contacted with the fixed contact piece. The safety switch comprises a heat transfer piece, an insulating seat, a fusible body, a control rod and a movable safety piece. The heat transfer piece is arranged on the insulating seat which is provided with a containing via hole and is arranged against on the heat transfer piece to form a containing cavity body with an upward opening. The fusible body is arranged in the containing cavity body. The control rod is inserted into the containing via hole from top to bottom, and the lower end of the control rod supports against on the fusible body. The movable safety piece is connected with the insulating system, is supported against by the control rod, and is in normally closed connection with the fixed contact piece.

A thermal fuse having a quick melting property is provided. In the thermal fuse, metal layers 15, 16 connected to a fusible alloy 13 are provided at respective leading ends of a pair of metal terminals 11. The metal layers 15, 16 have larger wettability to a fusible alloy 13 than wettability of metal terminals 11 and first insulating film 12. The area (S) of the metal layers 15, 16, the length (L1) and the volume (V) of the fusible alloy 13, the distance (L2) between the leading ends of the metal terminals 11, and the distance (d) from the bottom face of the second insulating film 14 to the top face of the metal layers 15,16 satisfy the relation of Sd>V(L1+L2)/2L1.

A “passive” apparatus and method for isolating flow within a thermal wellbore wherein inflow apertures are plugged with a temporary fusible alloy plug that can be selectively removed by increasing the wellbore temperature.