78results about How to "Avoid fracking" patented technology

The invention discloses a true triaxial loading and unloading test device for large-size bedded pressure-bearing rock and a testing method. The device comprises a confining pressure loading module, a sample storage and water outlet module, a confined water loading module, a load loading module and a signal collecting and processing system, wherein the confining pressure loading module comprises two horizontal loading and unloading systems which are independent and perpendicular to each other and is used for performing horizontal load loading and unloading on the wrapped sample storage and water outlet module; the confined water loading module is located at the bottom of the sample storage and water outlet module and is used for performing confined water loading and unloading on the bottom of the bedded rock; the load loading module is located at the top of the sample storage and water outlet module and is used for performing vertical load loading and unloading on the top of the bedded rock; the signal collecting and processing system is used for collecting and analyzing signals in a test process. The test device realizes the true triaxial test of the bedded rock through four independent loading and unloading systems, truly simulates three-way anisobaric stress state of the coal-series bedded pressure-bearing rock and is more true and more reliable than a conventional triaxial test.

The invention relates to a medical bottling device, in particular to a medical pill quantitative bottling device. The medical pill quantitative bottling device can prevent arm soreness and improve thepill quantitative bottling efficiency. According to the following technical scheme, the medical pill quantitative bottling device comprises a machine frame, a first bracket, a pill barrel, a barrel neck, a barrel pipe, a first rotary shaft, a groove disc, a first belt wheel, a motor, a second belt wheel and the like; the first bracket is installed on the left side of the upper portion of the machine frame; the pill barrel is fixed to the left side surface of the first bracket; the barrel neck is fixed to the bottom of the pill barrel; the barrel pipe is arranged at the bottom of the barrel neck; and the first rotary shaft is rotationally installed on the rear side surface of the interior of the barrel neck. According to the medical pill quantitative bottling device, pills can be conveyedinto the barrel pipe through rotation of the groove disc, the barrel pipe can be opened after a baffle moves rightwards, thus, the pills can fall into pill bottles, accordingly, medical workers can quantitatively charge the pills into the bottles conveniently, the labor intensity of the medical workers can be relieved, and the medical pill quantitative bottling efficiency can be improved.

An earth boring apparatus may include an earth-boring cutter head, and a casing secured to the cutter head and extending rearwardly therefrom so that the casing and cutter head are rotatable together as a unit. A casing cuttings passage may extend from adjacent the casing front end to adjacent the casing back end. An entrance opening of the casing cuttings passage, which is adjacent the cutter head, is adapted to allow cuttings to move through the entrance opening into the casing cuttings passage. In some implementations there may be a stationary auger positioned within the casing cuttings passage rearwardly from the entrance opening, such that the stationary auger does not rotate when the casing and cutter head are rotated together as a unit.

The invention discloses a coal spontaneous combustion gas marker acquiring device for a goaf. The coal spontaneous combustion gas marker acquiring device comprises high-pressure pipes (1) arranged along an oxidation and heating zone and the air return shaft direction, the high-pressure pipes (1) are axially and fixedly connected by connecting casings (4), the middle of each high-pressure pipe (1) is provided with a detector pipe (2) communicated with the inside of the high-pressure pipe (1), a plurality of binding pipes (3) connected with an air sucking pump are arranged in the high-pressure pipes (1), the other ends of the binding pipes (3) extend into the detector pipes (2) and the ends of the binding pipes (3) are fixed at the ends of the detector pipes (2) by fixing clamps (7). The coal spontaneous combustion gas marker acquiring device is resistant to high pressure and high in strength, the pipeline is protected from cracking by rock mass collapse of the goaf, and bending can meet actual arrangement needs within a certain radius; the high-pressure pipes are rubber pipes and are resistant to high temperature and anti-ageing, service lives of the high-pressure pipes are prolonged, oxidation and corrosion under the action of high-temperature smoke and water steam can be prevented, and the coal spontaneous combustion gas marker acquiring device is durable and has excellent structure stability.

The invention discloses a water purifier water pipe connecting gluing device, and belongs to the field of water purifying devices. An electromotor is arranged on an electromotor base; a first ultrasonic transducer is fixed in the middle of a workbench; a second ultrasonic transducer base is arranged at the lower right corner of a fixed frame; a second ultrasonic transducer is fixed on the second ultrasonic transducer base; a guiding frame is an arc; four water pipe fixing devices are separately arranged at the left side, the right side, the upper side and the lower side inside the fixed frame;a painting device is arranged on a main shaft of a first hydraulic cylinder; the first hydraulic cylinder is fixed on a first ultrasonic transducer base; the water pipe locating device is arranged onthe front end of an electromotor main shaft; and a controller is fixed above the workbench. The water purifier water pipe connecting gluing device is used for clamping a water pipe by means of the water pipe fixing device and a water pipe locating device, the painting device is driven by the electromotor to perform uniform gluing to the water pipe surface, the manual work is replaced, and the production efficiency and quality are improved.

The invention relates to a pipe cutting and grooving machine which aims at solving the technical problems that the cutting surfaces are uneven and the construction requirements are not met due to the existing manual cutting on plastic pipes and grooving on the pipes is complicated in technology. The pipe cutting and grooving machine comprises a frame, a clamping rotation mechanism, a cutting and grooving mechanism and a power source; the clamping rotation mechanism, the cutting and grooving mechanism and the power source are correspondingly arranged on the frame in turn; the clamping rotation mechanism is used for clamping the pipes and driving the pipes to rotate. According to the pipe cutting and grooving machine, the cutting and grooving machining on the pipes can be effectively and rapidly achieved, the surfaces of the grooved and cut pipes are neat and smooth, and the construction requirements are met.

The invention discloses a pressing demoulding method of an equal-density pressing machine. The equal-density pressing machine comprises an upper pressing mechanism, a middle mould mechanism and a lower pressing mechanism. The upper pressing mechanism comprises an upper punch which can move up and down, the lower pressing mechanism comprises a lower punch which can move up and down, and the middle mould mechanism is provided with mould holes which correspond to the upper punch and the lower punch. The pressing demoulding method comprises a feeding step, a pressing step, a pressure maintaining demoulding step and a demoulding step. In the pressure maintaining demoulding step, the upper punch and the lower punch move upwards, and pressure maintaining is carried out on a pressed material element until the top end of the pressed material element is flush with the surfaces of mould holes. In the demoulding step, when the pressed material element starts to leave the mould holes, the upper punch is separated from the material element and goes back to the original position, the lower punch moves upwards continuously until the material element is pushed out of the mould holes completely, accordingly, the material element can be effectively prevented from being cracked in the pressure maintaining demoulding step, and cracking caused by the fact that pressure exerted on the top end of the material element exceeds the bearing capacity of the material element can be effectively avoided.

The invention relates to a rock burst roadway energy absorption and release comprehensive anti-impact supporting method. Foundation anchor net supporting of a roadway top plate and side parts is rapidly completed; according to different roadway rock burst danger levels, anchor cable holes are drilled in the top plate and the two side parts according to different row spacings, and it is ensured that the anchor cable holes and anchor rod holes are not located in one same roadway section; square shallow holes are constructed in two bottom corners of a roadway, the row spacing of the square shallow holes in the bottom corners of the roadway is the same as that of the anchor cable holes, and the square shallow holes and the anchor cable holes are located on the same section; an energy absorbingand releasing anti-impact bracket is mounted and fixed by taking the square shallow holes in the bottom corners of the roadway as base points, an anchor cable is mounted in the anchor cable holes bypenetrating through round holes reserved in the anti-impact bracket, an anchor cable tray and a lock are mounted, anchor cable pre-tightening force is applied, the energy absorbing and releasing anti-impact bracket is fixed, and the energy absorbing and releasing anti-impact bracket is clung to roadway surrounding rock; and along with roadway tunneling, the steps are circularly completed, and supporting of the rock burst roadway is completed.

The invention provides a touch panel with a conductive protection layer. The touch panel with the conductive protection layer is characterized in that the touch panel comprises a substrate, a sensing electrode layer, a signal lead layer and a conductive protection layer, wherein a joint area is defined on the substrate, the sensing electrode layer is arranged on the substrate, the signal lead layer is arranged on the substrate and comprises multiple signal leads, one end of each signal lead is electrically connected to the sensing electrode layer, the other end of each signal lead is gathered to the joint area, the conductive protection layer comprises multiple conductive blocks, each conductive block is located on the corresponding signal lead in the joint area, and the signal leads are electrically insulated with one another. The invention further provides a manufacturing method of the touch panel with the conductive protection layer. The touch panel and the manufacturing method aim to solve the problem that signal leads are prone to fracturing when being attached to a flexible printed circuit in the prior art, and the product yield is increased.

The invention discloses an aluminum nitride embedded PCB substrate comprising a rigid substrate in which an accommodating groove is formed, an aluminum nitride block is arranged in the accommodating groove, a conductive layer and a copper planted layer are successively arranged on the top surface and the bottom surface of the aluminum nitride block along directions far away from the aluminum nitride block. As the aluminum nitride block has high thermal conductivity, low dielectric constant, low dielectric loss and excellent electrical insulating property, the heat dissipation performance of the rigid substrate is significantly improved, the aluminum nitride block substrate does not include titanium, the step of removing the titanium is saved, the manufacturing process of the substrate is shortened, and meanwhile the environment problem caused by titanium removing solution is also avoided. The invention also discloses a method for manufacturing the aluminum nitride embedded PCB substrate, with high laser cutting accuracy and efficiency. The mode of using a mechanical arm for automatically grasping the aluminum nitride block and placing the aluminum nitride block into the accommodating groove is used for embedding the aluminum nitride block; compared with the conventional manual taking and placing operations, the mode of the manufacturing method provided by the invention is significantly improved in machining efficiency, operation staffs are also prevented from directly contacting the aluminum nitride block and polluting the same, and thus the hidden quality troubles are reduced.

The invention relates to a small-diameter sleeve window sidetrack drilling traction type well fixing method, and belongs to the technical field of petroleum and gas well fixing. According to the technical scheme of the small-diameter sleeve window sidetrack drilling traction type well fixing method, a smart short-circuit circulating short joint along with a well fixing pipe column enters a well together; an original well drilling liquid is injected, an annulus is washed, then a special-amount conventional extra-low density well drilling fluid (or branch water), a separating liquid, cement paste and the original well drilling liquid are injected in sequence; a short-circuit circulating channel is opened, and the conventional extra-low density well drilling fluid (orbranch water) enters the annulus; and after the conventional extra-low density well drilling fluid (or branch water) fully passes, the short-circuit circulating channel is closed; the cement paste is pressed into the annulus by using the pressure difference, and the traction type well fixing is formed. The small-diameter sleeve window sidetrack drilling traction type well fixing method has the advantages that by reducing the annulus liquid density, the total pressure borne by the well bottom is reduced, pressing crack of the well bottom is prevented, the one-time success rate of small-diameter sleeve window sidetrack drilling well fixing is greatly improved, the well fixing quality is ensured, the cost is reduced, and pollution of an oil-gas layer is avoided.

The present invention discloses an insulation and heat conduction heat radiation structure based on a ceramic chip. The structure comprises: a radiator (1), wherein an IGBT package piece (4) is fixedon the radiator (1); and an insulation fixed part (9), wherein a ceramic chip (2) is arranged between the radiator (1) and the IGBT package piece (4), the insulation fixed part (9) is configured to fix the IGBT package piece (4) and the ceramic chip (2) at the radiator (1) in order. The ceramic chip with heat conduction and insulation is added between an IGBT electrode and the radiator, and the special insulation fixed part is added at the radiator and the IGBT to enhance the insulation performance between the IGBT electrode and the radiator and meet the application demand with a better dielectric strength; the cost of extra addition of the insulation fixed part on the ceramic chip and the radiator is lower than the cost added by directly selecting a high-level dielectric strength, and therefore, the insulation and heat conduction heat radiation structure based on the ceramic chip has an objective economic benefit.

The invention relates to a loose sandstone fracturing, filling, sand prevention, yield increase and profile control integrated design method which comprises the following steps: 1) performing a fracturing crack initiation and extension numerical simulation experiment on loose sandstone through a fracturing device to obtain a loose sandstone fracturing crack initiation and extension numerical simulation result; 2) reservoir numerical simulation: describing the real reservoir dynamic state by using the established running water two-phase seepage mathematical model, and simulating the exploitation process of an actual oil field by using seepage mechanics; and (3) on the basis of the fracturing crack initiation and extension numerical simulation result and the oil reservoir numerical simulation result, implementing fracturing, filling, profile control and yield increase integrated design. According to the method, a high-permeability layer is prevented from being fractured while a relatively-low-permeability layer is selectively fractured, the relatively-low-permeability reservoir is transformed, and the purpose of integrated operation of profile control, water control, sand preventionand yield increase is achieved.

A cutting assembly and method for drilling an underground borehole. The cutting assembly includes front and rear cutting heads of different diameters mounted on a shaft. An air passage defined through the cutting assembly may be placed in fluid communication with a pressurized remote air source and with a bore of a casing extending rearwardly from the cutting assembly. Pressurized air flows through the air passage and entrains cuttings produced by the front and rear cutting heads. A housing extends rearwardly from the larger diameter rear cutting head and an auger provided within the housing aids in directing cuttings into the casing. The auger rotates independently of the rest of the cutting assembly and may be configured to further reduce the size of the cuttings. A collar on the housing seals the borehole cut by the rear cutting assembly and aids in preventing frac-out.

The invention discloses a trimming machine for trimming a base of a damper. The trimming machine comprises a machine frame (1), a machine head (2) is arranged on the machine frame (1), a rotary disc (3) driven by an electric motor is further arranged on the machine frame (1), an upper locating column (4) and two rollers (6) are respectively arranged on the wheel carrier (5), a device for adjusting the positions of the rollers (6) is further arranged on the wheel carrier (5), a radial convex ring (19) is arranged on the circumference face of each roller (6), and a top head (7) is matched with the bottom end of the upper locating column (4) in a rotatable mode. A lower locating column (8) and a linkage pin (9) are arranged on the rotary disc (3). The trimming machine further comprises a numerical control system, a first pressure sensor is arranged on the top head (7), and the numerical control system is respectively connected with the first pressure sensor and the electric motor driving the rotary disc (3). The trimming machine is fast in speed, high in precision and high in efficiency.

The invention discloses a self-pressurization coal body fracturing permeability-increasing enhanced gas extraction method based on ultrasonic waves. The self-pressurization coal body fracturing permeability-increasing enhanced gas extraction method comprises the steps: a permeability-increasing drill hole driven in a coal seam in a high-position drainage roadway, and the permeability-increasing drill hole is sealed through two hole sealing bags and grouting; water is injected into the deepest position of the permeability-increasing drill hole through the gravity of the water, and a one-way ball valve on a water injection pipe is closed to stop water injection at the moment when the internal water pressure exceeds the gravity of the water in the water injection pipe; the ultrasonic waves are emitted through ultrasonic vibrators, the water temperature rises and vaporizes due to the loss of the ultrasonic waves transmitted in water, the pressure of the deepest position of the permeability-increasing drill hole is increased, meanwhile, the cavitation effect is generated when the ultrasonic waves are transmitted in the water, and extremely high tensile stress is formed through generation and bursting of cavitation bubbles; under the combined action of the cavitation effect and vaporization pressurization, surrounding coal is fractured to form fractures; and in the whole process, a water pump is not needed, fracturing permeability increasing can be continuously conducted on a coal body only through combination of the gravity of the water and the ultrasonic waves, therefore the gas extraction effect on the coal seam after permeability increasing is guaranteed, and energy consumption is effectively reduced.

The invention discloses a self-heating device for metal canned beverage and food. The self-heating device comprises a metal inner can for storing foods, an outer can body, an intelligent base, a heating bag, an easily-torn water bag and a pull rope, and is characterized in that a can bottom made from a metal material is arranged at the bottom of the outer can body; the outer can body is made from a composite paper tube; the intelligent base is arranged inside the outer can body; the metal inner can is arranged on the chassis of the intelligent base; the easily-torn water bag and the heating bag are arranged below the chassis; the easily-torn water bag is connected with the pull rope; the pull rope reaches the chassis of the intelligent base after bypassing the lower surface of the easily-torn water bag and extends to the upper surface of the metal inner can via the sidewall of the metal inner can. According to the self-heating device for the metal canned beverage and food, the easily-torn water bag is convenient to tear and effortless; the pull rope bypasses a triangular reinforcing rib; water in the water bag is totally extruded out and has full reaction with the heating bag; the problems that the pull rope is broken, but the water bag is not opened or the water bag is not heated enough are prevented; therefore, the self-heating device is applicable to various canned foods which need to be heated, and is especially applicable to the packaging for soup, porridge, coffee and the like.

An earth boring apparatus may include an earth-boring cutter head, and a casing secured to the cutter head and extending rearwardly therefrom so that the casing and cutter head are rotatable together as a unit. A casing cuttings passage may extend from adjacent the casing front end to adjacent the casing back end. An entrance opening of the casing cuttings passage, which is adjacent the cutter head, is adapted to allow cuttings to move through the entrance opening into the casing cuttings passage. In some implementations there may be a stationary auger positioned within the casing cuttings passage rearwardly from the entrance opening, such that the stationary auger does not rotate when the casing and cutter head are rotated together as a unit.

A negative pressure gasoline pump comprises a gasoline pump body (1), an upper cover (2) and a lower cover (3). A negative pressure spring (10), a first spring cover (11), a membrane (12), a second spring cover (13) and positive pressure spring (14) are sequentially disposed between the inner wall of the upper cover (2) and the gasoline pump body (1). One side of the first spring cover (11) is connected to one end, close to the membrane (12), of the negative pressure spring (10) in a sleeved manner. The other side of the first spring cover (11) is abutted against the membrane (12). One side of the second spring cover (13) is connected to one end, close to the membrane (12), of the positive pressure spring (14) in sleeved manner. The other side of the second spring cover (13) is abutted against the membrane (12). A gasoline outlet membrane (15) is disposed between the lower cover (3) and the gasoline pump body (1). Compared with the prior art, the negative pressure gasoline pump has the advantages that the pump is high in gasoline speed, high in work efficiency and long in service life, and work efficient of an engine can be further increased.

A cutting assembly and method for drilling an underground borehole. The cutting assembly includes front and rear cutting heads of different diameters mounted on a shaft. An air passage defined through the cutting assembly may be placed in fluid communication with a pressurized remote air source and with a bore of a casing extending rearwardly from the cutting assembly. Pressurized air flows through the air passage and entrains cuttings produced by the front and rear cutting heads. A housing extends rearwardly from the larger diameter rear cutting head and an auger provided within the housing aids in directing cuttings into the casing. The auger rotates independently of the rest of the cutting assembly and may be configured to further reduce the size of the cuttings. A collar on the housing seals the borehole cut by the rear cutting assembly and aids in preventing frac-out.

The invention relates to a PVC tube, in particular to a PVC anti-freezing tube which mainly comprises a tube body, sponge is arranged on the tube body, steel balls are arranged in the sponge, and the sponge is sleeved with a PVC tube sleeve. The PVC anti-freezing tube is simple in structure and reasonable in design, and a hollow layer is filled with the sponge, so that the heat preservation effect of the tube body is good, and the tube body is not prone to be frozen and not prone to cracking. Under the action of the steel balls, the gap existing between the external tube sleeve and the tube body is reduced, the external PVC tube sleeve is prevented from being fractured, and therefore the service life of the PVC anti-freezing tube is prolonged.

An intelligent control system of pure water machine comprises power supply unit forced washing key, transducer module, signal processing module, signal monitoring module and control center .It features that control center is connected separately to power supply unit and forced washing key.

The invention discloses an ampoule bottle chain conveying device comprising a machine frame. A chain conveyor used for conveying ampoule bottles is arranged on the machine frame. A crescent type bottle blocking mechanism matched with the chain conveyor is arranged on the portion, corresponding to the bottle outlet side of the chain conveyor, of the machine frame. The crescent type bottle blockingmechanism comprises an installation base installed on the chain conveyor. An arc-shaped guide opening matched with the bottle outlet end of the chain conveyor is formed in the installation base. An elastic bottle pressing device is arranged at the position of the guide opening. The elastic bottle pressing device comprises multiple sets of crescent elastic pieces arranged along the guide opening. Any set of crescent elastic pieces can move along the radial lines of crescent fixed plates. Any set of crescent elastic pieces are connected with an elastic device. Chain wear-resistant strips used for supporting a conveying chain are arranged on the portions, located under an upper conveying face of the chain conveyor, of the upper portion of the machine frame. A pneumatic chain rising and falling device used for driving the chain to rise and fall is arranged on the portion, located between the two adjacent chain wear-resistant strips, of the middle position of the machine frame. The ampoulebottle chain conveying device has the effects of being high in conveying efficiency and stable in bottle conveying.

The invention relates to a wood modification device which is characterized in that a pressure jar is connected to a liquid medicine circulation system through a pipeline, wherein the upper part of the pressure jar is provided with a hot air valve through the pipeline. The working principle is as follows: all valves are closed at first; a 50-150mm cylindrical surface is pre-processed on one end of a log and the log is arranged in the pressure jar through an upper cover round hole; the log and an upper cover are fixed through a block ring and are in sealing connection; and then, a tree liquid valve, a right lower valve and a left upper valve are opened; a liquid medicine pump is opened for pumping the liquid medicine in a liquid medicine jar into the pressure jar; the liquid medicine enters from a lower end face of the log and the tree liquid in the log is expelled to flow out from an upper end face of the log; and then the tree liquid passes through the tree liquid valve through a liquid collection slot and flows into the tree liquid jar; and when the viscosity or color of the liquid flowed from the upper end face of the log changes obviously, a return valve is opened, the tree liquid valve is closed, the liquid flowed out from the end face of the log flows back to the liquid medicine jar, a heater is started for heating the liquid medicine which enters into the pressure jar till the liquid medicine is at a preset temperature, and the liquid medicine which flows by the log is quickly heated and soaked by the log.

The invention relates to the field of materials, and particularly relates to a high-temperature-resistance and high-pressure-resistance composite material structure, a rubber sleeve manufactured by using the composite material structure, a rubber sleeve manufacturing method, a packer with the rubber sleeve and a bridge plug. The composite material structure is woven by graphite and metal wire mixture and high-temperature-resistance fibers, wherein the graphite and metal wire mixture comprises continuous metal wires and graphite seals, and the metal wires are inserted into the graphite seals or wound on the surfaces of the graphite seals. According to the composite material structure, the metal wires are inserted into the graphite seals or wound on the surfaces of the graphite seals, so that deformation of the graphite seals can be restrained, and the graphite and metal wire mixture can be prevented from being cracked during axial pressure action; and the metal wires and graphite seals have high temperature resistance, so that the graphite and metal wire mixture has excellent high temperature resistance. When the graphite and metal wire mixture and the high-temperature-resistance fibers are woven to form the composite material structure, the hardness of the composite material structure can be effectively reduced, and the composite material structure can be easily compressed.

A nozzle for continuous casting in which durability is enhanced by arranging a refractory layer of high performance, e.g. high corrosion resistance or high adhesion preventive properties, on the inner hole side. A method for manufacturing a nozzle for continuous casting in which push breaking of the outer circumferential side layer due to the difference in thermal expansion between the inner hole side layer and the outer circumferential side layer of body material is prevented, and exfoliation of the inner hole side layer in the way of casting is prevented, is also provided. The nozzle for continuous casting has such an integral structure as the boundary portion of the inner hole side layer (2) and an intermediate layer (4) touches the boundary portion of the intermediate layer (4) and the outer circumferential side layer (3) directly wherein the bonding strength of the intermediate layer and the inner hole side layer and the outer circumferential side layer adjoining the intermediate layer is 0.01-1.5 Mpa in a 1000 DEG C non-oxidizing atmosphere, and a compression rate K(%) of the intermediate layer in the 1000 DEG C non-oxidizing atmosphere under the pressure of 2.5 Mpa is 10%-80%.

A damping and anti-compression and sliding slip sleeper for a subsequent trolley transporting battery car of a shielding tunnel machine is provided. The damping and anti-compression and sliding slip sleeper is characterized in that an arc-shaped steel plate strip is applied to the internal surface of a shielded tunnel pipe ring; vertical bearing rib plates are arranged on the arc-shaped steel plate strip; the top surfaces of the vertical bearing rib plates are on the same elevation; and each vertical bearing rib plate is provided with a horizontal supporting member for installation and supportof a steel rail. The damping and anti-compression and sliding slip sleeper for the subsequent trolley transporting battery car of the shielding tunnel machine is advantageous in that the battery cartransmits load to the internal surface of the shielding tunnel pipe ring via the horizontal supporting members, the vertical bearing rib plates and the arc-shaped steel plate strip orderly; concentrated load vertically transmitted can be converted into surface load evenly distributed; stress to the local of the lower part of the shielding tunnel pipe ring is even, so lower part local concrete fracture can be effectively avoided and breakage, deformation and slippage of the local of the lower part of the shielding tunnel pipe ring can be prevented; work stability and safety can be enhanced; anda technical demand for super-large diameter shielding tunnel engineering construction can be met.

The invention provides a copper interconnection structure and a method for manufacturing the same. The copper interconnection structure comprises a semiconductor substrate, a first interlayer dielectric layer disposed on the semiconductor substrate, a copper plug running through the first interlayer dielectric layer, a second interlayer dielectric layer disposed on the first interlayer dielectric layer, and a copper interconnection wire running through the second interlayer dielectric layer. A first protective layer is arranged between the first interlayer dielectric layer and the copper interconnection wire, and a second protective layer is arranged between the second interlayer dielectric layer and the copper interconnection wire. According to the copper interconnection structure provided by the invention, as the first protective layer is arranged between the first interlayer dielectric layer and the copper interconnection wire and the second protective layer is arranged between the second interlayer dielectric layer and the copper interconnection wire, direct contact between the copper interconnection wire and the first interlayer dielectric layer and between the copper interconnection wire and the second interlayer dielectric layer is avoided, and the first interlayer dielectric layer and the second interlayer dielectric layer are prevented from being fractured by the copper interconnection wire.

The invention discloses a self-heating device for metal canned beverage and food. The self-heating device comprises a metal inner can for storing foods, an outer can body, an intelligent base, a heating bag, an easily-torn water bag and a pull rope, and is characterized in that a can bottom made from a metal material is arranged at the bottom of the outer can body; the outer can body is made from a composite paper tube; the intelligent base is arranged inside the outer can body; the metal inner can is arranged on the chassis of the intelligent base; the easily-torn water bag and the heating bag are arranged below the chassis; the easily-torn water bag is connected with the pull rope; the pull rope reaches the chassis of the intelligent base after bypassing the lower surface of the easily-torn water bag and extends to the upper surface of the metal inner can via the sidewall of the metal inner can. According to the self-heating device for the metal canned beverage and food, the easily-torn water bag is convenient to tear and effortless; the pull rope bypasses a triangular reinforcing rib; water in the water bag is totally extruded out and has full reaction with the heating bag; the problems that the pull rope is broken, but the water bag is not opened or the water bag is not heated enough are prevented; therefore, the self-heating device is applicable to various canned foods which need to be heated, and is especially applicable to the packaging for soup, porridge, coffee and the like.