34results about How to "Eliminate weak links" patented technology

A high-strength antiwear multi-toothed-roller drill bit for drilling well has two or more palms whose upper parts are connected to form a whold drill bit body and whose lower parts are jibaxle, and multiple toothed rollers installed onto said jibaxle. Said toothed rollers is composed of the rollers with big tip on tooth and the roollers with flat front end on tooth. It has long service life.

The invention is directed to a vessel for separating solid particles from a gas containing solid particles, said vessel comprising a plate provided with openings across the vessel such that the plate divides the vessel in a first and second space, a number of filter elements extending from the openings into the first space, a vessel opening for receiving the gas containing solid particles, fluidly connected to the first space, an vessel outlet opening for discharge of solids, fluidly connected to the first space and a vessel outlet opening for gas, fluidly connected to the second space. The first space further comprises one or more cyclone separation devices having an inlet fluidly connected to the vessel opening for receiving the gas containing solid particles, a cyclone gas outlet fluidly connected to the first space and a solids cyclone outlet.

The present invention is a new ejection structure, most of the models installed and used at present are centralized ejection structures. This type of ejector has the characteristics of simple structure and high strength, but the disadvantage is that the ejection ratio is low and the performance is slightly poor. The technical solution of the present invention is to divide the injection structure into a nozzle ring, a rear sealing ring and a flange joint, and the three parts are all formed by integral machining, and then welded to form the injection body. This structure improves the injection performance, avoids the problem of insufficient strength of the overhanging nozzle, reduces the number of welds, eliminates weak links, and improves its overall reliability.

The invention discloses a method for manufacturing cement-base conducting composite materials, which belongs to the technical field of civil engineering. The method is characterized in that a plane stainless steel net is manufactured into a solid stainless steel net of different waveforms. When a cement-base conducting composite material specimen is manufactured, the wave crests of the electrodesof two solid stainless steel nets are arranged oppositely; and as the basal body of the cement-base conducting composite material can be made of cement paste, cement mortar or concrete, and the conductive phases incorporated can be carbon fiber, powdered carbon, steel fiber, steel scrap, plumbago or carbon nanometer tubes, the grid sizes of the plane stainless steel net, the waveforms, the cyclesand the amplitudes of the waveforms of the electrodes of the solid stainless steel nets can be selected on a rational basis according to the types of the material of the base body and the conducting material besides considering the type and the size of the specimen in practical application. The invention has the advantages that the contact resistance between the electrodes and the base body can be reduced; the influence of polarization effect is reduced; the bonding effect of the electrodes and aggregate is improved; and the accuracy of the resistance test of the cement-base conducting composite material is improved.

The invention relates to a vessel for separating solid particles from a gas containing them, said vessel comprising: a plate provided with a plurality of openings traversing the vessel such that the plate divides the vessel into a first space and a second space; a plurality of filter elements extending from the plurality of openings to the first space; a container opening for receiving gas containing solid particles, the container opening being in fluid communication with the first space a container outlet opening for discharging solids, the container outlet opening being in fluid communication with the first space; and a container outlet opening for gas being in fluid communication with the second space. The first space also includes one or more cyclonic separation devices having: an inlet fluidly connected to a container opening for receiving gas containing solid particles; a cyclone fluidly connected to the first space; flow gas outlet; and solid swirl outlet.

The invention belongs to the technical field of metallurgy industry, and in particular relates to a top-fired air heating furnace. A combustor of the top-fired air heating furnace is positioned above an air heating furnace heat storage body with a hot-blast air outlet, and is a vault part of the top-fired air heating furnace. The combustor has a three-segment type structure; a first segment is a combustion chamber which is positioned at the lower part of the combustor and is directly seated on the air heating furnace body; the upper end of a working inner lining of the combustion chamber is in a shape of a contracting mouth and vertically stretches into a gas swirl premixing chamber of the middle part without contacting a working inner lining of the gas swirl premixing chamber, and can expand freely; a second segment is the gas swirl premixing chamber positioned at the middle part of the combustor; and a third segment is an air chamber positioned at the upper part of the combustor. The top-fired air heating furnace does not generate the mutual blow-by between air and gas, and has the characteristics of no gas residues at the combustor vault, higher swirl strength, and better stability and service life of the masonry of the combustor vault. The top-fired air heating furnace can be widely applied to the air heating furnace to heat blast furnace blast media.

The invention provides a seismic behavior based optimization method and system for a building structure. The seismic behavior based optimization method comprises the following step: A1, determining the integral target seismic behavior index of the structure and the seismic behavior index of a target construction member; A2, designing an initial structure, and dividing the construction members with the same boundary condition, the same cross section size and the same material parameter in the same layer of the structure into one class; A3, obtaining the integral damage index of the structure; A4, detecting whether the integral damage index satisfies a constraint condition, if so, performing step A5, and if not performing step 2; A5, obtaining the seismic behavior index of various classes of construction members of the structure; A6, detecting whether the seismic behavior index of various classes of construction members of the structure satisfies a condition of convergence, if so, finishing the optimization, and if not, performing step A7; and A7, determining the step size of next optimization step, updating a structural system, and returning step A3.

The invention discloses a composite rock wool reinforcement plate and a preparation method for the composite rock wool reinforcement plate. The composite rock wool reinforcement plate comprises a core plate; wherein the core plate is composed of at least two rock wool slivers which are arranged side by side; the arrangement direction of fiber yarns of the rock wool slivers is in parallel with the thickness direction of the composite rock wool reinforcement plate; the four surfaces of the core plate in the length direction are wrapped by a layer of reinforced fiber layer; and the outer surface of the reinforced fiber layer is coated by a layer of mortar protecting layer. According to the composite rock wool reinforcement plate and the preparation method, the shortcomings of low tensile strength and low compression strength of common rock wool plate are overcome, the weak link of stress is eliminated, and the safety of the system is improved; and the composite rock wool reinforcement plate has the advantages of good heat insulating effect, high intensity, good fire-proof and humidity resistant performances, simple construction and long service life, so that the composite rock wool reinforcement plate can be widely applied to the fields of outer wall constructions of buildings.

The invention relates to a gas-preventing and corrosion-preventing connection method for a lead sheath oil-submersible cable. The gas-preventing and corrosion-preventing connection method mainly solves the problem that the service of the oil-submersible cable is lowered caused by connecting place corrosion due to frequent blow-by and bulging used in gas-containing oil wells. The gas-preventing and corrosion-preventing connection method for the lead sheath oil-submersible cable is characterized by comprising the following steps: (1) removing an external armored skin, a lead sheath and an insulation layer from the cable; (2) connecting large and small flat cables; (3) wrapping lead sheath: lap jointing and wrapping through a lead belt from the position of the lead sheath at one end of the cable to the 1 / 2 position of the lead sheath at the other end of the cable; after finishing the wrapping, winding and tightening the outer surface of the lead belt wrapper by cloth, and wrapping two layers of lead belts by the same method; and (4) wrapping tetrafluoride insulated rubber tape and glass fiber rubber tape on each phase of the whole lead belt wrapping layer separately; then wrapping the overall three-phase cable by the tetrafluoride insulated rubber tape and the glass fiber rubber tape, and finally armoring the armored skin. By adoption of the method, the whole oil-submersible cable, including the connection place, can be protected by the lead layer, so that the service life of the oil-submersible cable used in gas-containing oil wells is prolonged.

The invention relates to an asphalt-based non-curable heat-resistant waterproof sealant and a preparation method of the sealant. The sealant comprises the following components in percentage by weight: 10-35% of asphalt, 5-15% of rubber oil, 1-3% of polyolefin processing modifier, 20-30% of 30Mu-100Mu glue powder, 5-10% of tackifier, 10-30 of sodium bentonite, and 3-5% of wetting dispersant reagent. The sealant has the following characteristics of good bonding property, high percentage elongation, good self-healing property, good creep property, possible construction of knife coating, spray coating or grouting, no need to maintain, capability of being constructed on wet foundation surface even under condition of (-40) DEG C and thus effectively shortening the construction period, no organic solvent, low energy consumption in construction, safety, environmental friendliness, no pollution, high-temperature resistance (not flowing at 110 DEC C), low-temperature resistance (not cracking at (-40) DEG C), stable property, good stickiness, and capability of sealing base layer cracks and pores so as to avoid water channeling phenomenon.

A wire harness winding machine for a socket row power supply and a method for winding a power wire harness. The preparation and hooking mechanism of the main wire harness of the power cord and the continuous winding mechanism on the main wire harness; A line hook to obtain the trunk harness; the second step is to continuously wind coils on the trunk harness to become a power harness with a plug. Using this machine to wind the power wire harness, the products are uniform, beautiful and strong, the production efficiency can be increased by more than three times, and the weak link in the socket row production line is eliminated.

The present invention relates to a polyphenyl board and polyphenyl granules plastering composite heat-insulating wall body and its construction process, including base layer, heat-insulating layer and facing layer, its heat-insulating layer is made of polyphenyl board and polyphenyl granules through processes of plastering, mixing and combining, large-area of wall surface can be stuck with polyphenyl board, edge, corner, window reveal and door opening are polyphenyl board polyphenyl granules plastering heat-insulating layer and surface is facing layer. Said invention is simple in construction, low in cost, can solve the problem of heat-bridge and cold-bridge of wall body, and can obviously raise heat-insulating effect.

The invention discloses an intelligent adaptive review resource pushing method based on MCM, which includes obtaining the historical knowledge point wrong question data of all students; obtaining multiple wrong cause labels of the current student, and screening out the first wrong cause label belonging to the intelligence factor; For each first error label of the current student, the error importance degree value P(E) is calculated; according to the MCM label corresponding to each first error label, the MCM learning corresponding to the MCM label is extracted from the preset content management system. The resources are sorted in descending order according to the P(E) value of the error cause, and some or all of the MCM learning resources are extracted and pushed to the students according to the order. The knowledge point corresponding to the MCM label is wrong. The invention solves the problems that the review can cure the symptoms but not the root cause, and the students' learning level is difficult to really improve.