45results about How to "Good dense" patented technology

The invention relates to a gob-side road retaining supporting method of mining roadways of coal mines, comprising the following steps of: feeding a concrete to a filling mould by using a pump to pour along the lapse of a working surface on a gob side of the gob-side road retaining, and constructing a roadside backfilling wall 8; supporting top plates arranged above the backfilling wall 8 and outside the backfilling wall 8 by using an anchor cable and constructing in the front side of a leading support 1; adopting a height-adjustable integral pull-shift type road-injecting slip mould 6 by the backfilling mould; using blindage supports 3 and 5 on one side of the gob of the road-injecting slip mould to temporarily support; connecting the road-injecting slip mould and the blindage supports with the leading support 1 through a pull-shift jack to shift; and enabling the blindage supports, the roadside backfilling wall and the top surfaces of each leading support supported by the external anchor cable to be provided with grooves for protecting anchor cables of anchor rods. Besides the advantages of digging less roads, realizing pillarless exploration, releasing the tension of mining drifting and the like, the invention also has the advantages that the height of the road-injecting slip mould is integrally regulated by means of integral pull-shift hydraulic, the road-injecting slip mould is convenient to use and the work efficiency is improved; the supporting of the anchor cable is matched with the supporting of the backfilling wall to effectively control a separation layer of an immediate roof, and the blindage supports and the leading support can protect the anchor cables and the anchor rods from being jacked broken so as to lose efficacy.

The invention discloses a package bag secondary automatic packaging system, which comprises a secondary packaging automatic bag arranging mechanism, a secondary packing machine bag collecting cabin, a secondary packaging machine bag taking and bag opening mechanism, a secondary packaging machine bag storing mechanism, a secondary packaging machine bag supporting mechanism, a secondary packaging machine bag opening shaping and hot sealing mechanism and a secondary packaging machine bag dragging and bag holding mechanism. The package bag secondary automatic packaging system has the advantages that the automatic bag arranging, bag taking and bag conveying positions are accurate, the packaging stability is greatly improved, and the whole packaging system adopts a plurality of sensors, so the work efficiency is greatly improved, the work intensity of workers is reduced, and in addition, the installation performance is greatly enhanced.

The invention provides a method for filling a hinge joint of a fabricated prestressed hollow beam slab, and belongs to the technical field of bridge engineering. The method comprises the steps as follows: inserting a screw type blocking strip into a bottom gap of the hinge joint, wherein the top surface of the screw type blocking strip comprises two split parts, one part is lapped on the other part, the length of the lapping position is 3-5 cm, and rubber strips are arranged on wing plates on the two sides of the screw type blocking strip; filling the middle of the hinge joint with micro-expansion concrete; when the concrete of the hinge joint reaches enough age period, filling the top of the hinge joint with bituminous grout; and when the bituminous grout reaches the design performance, pouring a pavement layer on the top surface of the hollow beam slab. When the micro-expansion concrete is poured, the top surface of the screw type blocking strip is open, so that the space of a vertical column is communicated with that of the hinge joint and the screw type blocking strip is stabilized by the rubber strips on the wing plates and the self weight of the concrete of the hinge joint; and the middle of the hinge joint is filled with the micro-expansion concrete, so that the space of the hinge joint is closed for a long time and the problem of water seepage due to premature failure of the hinge joint is solved.

The invention provides an upper-layer and lower-layer joined-paving construction method of cement stabilized macadam. The upper-layer and lower-layer joined-paving construction method comprises the following steps: (a) paving a lower layer, namely, paving a lower-layer cement stabilized macadam mixture layer on a pavement, grinding the lower-layer cement stabilized macadam mixture layer; and (b) paving an upper layer, namely, within 12 hours since mixing of a cement stabilized macadam mixture of the lower-layer cement stabilized macadam mixture layer, paying an upper-layer cement stabilized macadam mixture layer on the upper surface of the lower-layer cement stabilized macadam mixture layer formed by rolling, and rolling the upper-layer cement stabilized macadam mixture layer. According to the upper-layer and lower-layer joined-paving construction method of the cement stabilized macadam, provided by the invention, the interlayer bonding strength is ensured, the interlayer construction time can be relatively prolonged, and the construction efficiency is improved.

The invention discloses a construction process for a cement stabilized macadam pavement. The construction process comprises the following steps: calculating a mix proportion of a cement stabilized macadam mixture, and blending the cement stabilized macadam mixture; laying a first cement stabilized macadam mixture layer on the pavement, laminating the first cement stabilized macadam mixture layer,laying a second cement stabilized macadam mixture layer on the upper surface of the laminated first cement stabilized macadam mixture layer, laminating the second cement stabilized macadam mixture layer, and maintaining the pavement until the strength of the pavement is not less than 3MPa. The pavement laid by the construction process difficultly causes cracks, and is long in service life and safeand reliable to use.

The invention discloses a multifunctional foaming system used in air foam flooding, relates to the technical field of oilfield development and is used for increasing oil recovery efficiency. The multifunctional foaming system is composed of following components, by weight: 0.1-0.5% of fatty alcohol polyoxyethylene ether sodium sulphate, 0.05-0.2% of silicon resin polyether emulsion, 0.05-0.2% of anionic polyacrylamide, 0.5-2% of molasses, 0.01-0.1% of yeast extraction, 0.0005-0.005% of ferrous sulfate, 0.00005-0.0002% of manganese sulfate, 0.05-0.5% of sodium nitrate and the balanced being water. The sum of weight percentages of all components is 100%. The multifunctional foaming system can solve a problem of requirements of a ground oxygen reducing apparatus and the profile control for plugging gas passages during conventional air foam flooding construction, and can enable the air foam flooding to be safe, more high-efficient and more low-cost.

The invention relates to a cement concrete compaction external vibrator, especially to a slipform paver external vibrator for compulsive compaction of cement concrete during continuous pouring of kerbs, side ditches and other structures. The concrete compaction vibrator comprises a box body. A longitudinally arranged high speed shaft is disposed at a central position inside the box body. A low speed shaft and a drive shaft are arranged on two sides of the high speed shaft symmetrically. The middle parts of the low speed shaft and the drive shaft are respectively in fixed connection with a first eccentric block. The middle part of the high speed shaft is in fixed connection with a second eccentric block. The low speed shaft, the high speed shaft and the drive shaft are provided with transmission gears. One side of the box body is equipped with a driving hydraulic motor that drives the drive shaft to rotate. With a stable structure, the slipform paver concrete compaction vibrator provided in the invention can remove the concrete adhered to a template lower surface so as to ensure a smooth surface of a concrete structure.

The invention provides an earthwork filling material for use in cold area, which is formed by waste casting sand, fly ash, cement, polystyrene particles and water according to certain weight percentages. According to the test measurement, the density of the earth work filling material reaches between 0.97 and 1.35x10<3>kg/m<3>, the compression strength reaches between 60 and 292kPa/7 days, and the compression strength reaches between 116 and 664kPa/28 days; meanwhile, the earth work filling material also improve the freeze-thaw resistance, the coefficient of thermal conductivity reaches between 0.40 and 0.74W/(m.K)/7 days, and the coefficient of thermal conductivity reaches between 0.350 and 0.53W/(m.K)/28 days. The earthwork filling material can reduce the breakdown of an earth filling project caused by frozen expansion in the cold areas and recycle the waste casting sand and fly ash, which cause pollutions on environment, as earthwork filling materials in the earth filling project; moreover, the filling materials, which are secondary industrial wastes, are widely available and low in price, thereby reducing cost.

The invention provides an apparatus and a method for lifting up, compacting and forming concrete in a steel-pipe column (wall). The apparatus comprises the following components: a material pressing structure node, a counter current preventing apparatus, a pressure regulating apparatus, and a pumping system; the material pressing structure node is arranged at the side surface of the bottom of the steel-pipe column (wall), and the material pressing structure node is connected to the counter current preventing apparatus, the pressure regulating apparatus, and the pumping system in order. The pumping system is used, a pressure conveying principle is used in order to lift concrete from the bottom of the steel-pipe column (wall) to the top of the column (wall), and the concrete is compacted and formed in the steel-pipe column (wall) by pressure. The apparatus and the method for lifting up, compacting and forming concrete in the steel-pipe column (wall) use local materials for processing and producing, pressure in a transfer pump is used for carrying out the lifting-up work for the concrete, so that the common concrete reaches effects of self-compaction concrete, and the apparatus and the method have the advantages of substantially reduced construction cost, simple operation, good quality, low cost, and substantial economic effects; the apparatus and the method can be applied to concrete construction of various steel-pipe columns (walls) with application and promotion values.

The invention discloses a valve with intelligent positioning and anti-blocking functions. The valve comprises a positioner and a valve actuator, wherein the positioner comprises an air source purification unit, an air inlet for inputting an air source is formed in the air source purification unit, the air source purification unit is connected with an anti-blocking electrical conversion unit used for controlling the valve actuator, the anti-blocking electrical conversion unit is connected with a circuit control unit through a control signal, and the circuit control unit is connected with a position feedback unit. The valve has the advantages that a drying indicator is wrapped inside water-absorbing cotton cloth so that moisture in airflow can be absorbed, then the inside of a purification shell is kept dry, and the valve positioner is prevented from being damaged; and during cleaning, a heating mechanism is arranged, so that hot air enters the purification shell, the water-absorbing cotton, the drying indicator and the water-absorbing cotton cloth are heated and dried, then the water-absorbing cotton, the drying indicator and the water-absorbing cotton cloth are in a dry working state, and the long-term moisture absorption and use of parts such as the water-absorbing cotton are guaranteed.

The invention provides a composite air-drying hardened wallboard and a manufacturing method and using method thereof. The wallboard comprises a rectangular frame, a rebar combination net and an air-drying face layer, and the rebar combination net and the air-drying face layer are sequentially located on the front side and the rear side of the frame from inside to outside. The air-drying face layercomprises a honeycomb weave layer and light dry-mixed mortar, the honeycomb weave layer is attached to or mounted on the rebar combination net, the honeycomb weave layer is provided with densely-covered honeycomb holes, the honeycomb holes of the honeycomb weave layer are filled with the light dry-mixed mortar, and paster is attached to the outer side of the air-drying face layer. The wallboard is low in weight and convenient to transport, the transporting cost is reduced, the labor intensity of workers in the mounting process is relieved, the mounting efficiency is improved, and the mountingmanpower cost is decreased. After the wallboard is mounted and hardened with water, the wallboard has the advantages that compactness and strength are good, and a wall face layer is not prone to cracking. Mechanized, standardized and large-scale production of the wallboard can be achieved in a factory, the production efficiency is improved, and the production cost is lowered.

The invention discloses a chloride-free early-strength water-reducing agent capable of improving concrete workability and relates to the technical field of concrete admixtures. The chloride-free early-strength water-reducing agent is prepared from, by weight, 60-70 parts of naphthalene or homolog, 20-25 parts of alum sludge, 15-20 parts of modified starch, 15-20 parts of shikakai powder, 12-18 parts of alkyl glycoside, 10-15 parts of nanometer talcum powder, 10-15 parts of tea saponin, 10-15 parts of polyamide resin, 8-12 parts of cane molasses, 7-10 parts of ascorbic acid, 5-8 parts of xanthan gum, 5-8 parts of itaconic acid, 30-40 parts of ethyl alcohol, and 250-300 parts of water. By the adoption of the early-strength water-reducing agent, water-reducing rate is high, the early-strength of concrete can be improved, concrete workability can be effectively improved, and pouring, densification and forming can be conducted conveniently by constructors. The early-strength water-reducing agent is suitable for steam-curing concrete, ordinary reinforced concrete which is constructed at a temperature not lower than -5 DEG C and has an early-strength requirement, and prestressed concrete.

The invention discloses a quick-dry self-flow casting material for a ladle permanent layer. The quick-dry self-flow casting material is prepared from the following raw materials in percentage by mass:56-75% of a pyrophyllite and fused mullite composite material of which the particle size is 1-9mm, 14-22% of a pyrophyllite and fused mullite composite material of which the particle size is 0-1mm, 2-8% of silicon nitride of which the particle size is less than or equal to 1mm, 0.5-1.5% of a water reduction agent, 0.8-1.5% of an anti-explosion agent, 1-3% of a combination agent, 1-3% of silicon dioxide micro powder of which the particle size is less than or equal to 60mu m, 1-4% of an active aluminum oxide micro powder of which the particle size is less than or equal to 60mu m, and 2-5% of asilica powder of which the particle size is less than or equal to 50mu m. By adopting the quick-dry self-flow casting material, the ladle permanent layer is good in thermal insulation, good in thermalshock resistance, good in peeling resistance and easy to construct, has the characteristics of excellent self flowing, spreading, filling and the like, can be rapidly baked without cracking, achievesthe purposes of self flowing and quick drying, in addition is free of iron slag adhesion, and is long in service life.

The invention discloses a self-flowing castable for a reclaimed ladle permanent layer. The castable is prepared from raw materials in percentage by mass as follows: 46%-56% of a waste ladle permanentlayer reclaimed material with granularity being 1-9 mm, 13%-20% of a pyrophyllite and fused mullite compound with granularity being 1-9 mm, 14%-22% of a pyrophyllite and fused mullite compound with granularity being 0-1 mm, 2%-6% of silicon nitride with granularity being smaller than or equal to 1 mm, 0.5%-1.5% of a water reducer, 0.5%-1.5% of an antiknock agent, 2%-5% of a binder, 1%-3% of silicafine powder with granularity being smaller than or equal to 60 mu m, 2%-5% of activated alumina powder with granularity being 60 mu m and 1%-4% of silica powder with granularity being smaller than orequal to 50 mu m. The self-flowing castable has good heat insulation, good thermal shock resistance and high stripping resistance, has excellent characteristics of self-flowing, leveling and filling,is easy to construct and can be quickly baked without bursting, and purposes of self-flowing and quick drying are achieved.

The invention relates to a casting method for an aluminum alloy engine shell. The casting method sequentially includes the following steps that firstly, red copper pipes are manufactured to be in a shape the same with that of shell oil ways, and the red copper pipes are sealed after being filled with precoated sand; secondly, cores are manufactured; thirdly, the red copper pipes and the cores arecombined and fixed; fourthly, the cores are subjected to pulp dipping and then sand pouring, then pulp dipping is conducted again and sand pouring is conducted again, the operation is conducted repeatedly by multiple layers, inner die shells are obtained, dewaxing is conducted after the inner die shell is subjected to air drying, and high-temperature roasting sizing is conducted; fifthly, sand molds are manufactured in sand boxes, cavities coincide with the outer wall of the engine shell in shape, and casting systems are arranged in the sand molds; sixthly, the inner die shells are put into the cavities of the sand molds, then mold assembling is conducted; seventhly, aluminum alloy liquid is injected into the cavities till mold filling is completed; eighthly, after cooling forming, the engine shell is obtained, spare parts are removed, and the precoated sand in all the red copper pipes is removed; ninth, the shell engine is immersed in a dilute nitric acid solution, and the red copperpipes are corroded and form oil ways. By means of the casting method, the manufacturing cost is low, consumption of raw materials is low, the product quality is good, manufactured hole ways are smoothand reliable, and the yield is high.

The invention provides a C30 grade steel slag powder self-consolidating concrete with a water-binder ratio controlled at 0.3-0.7. The C30 grade steel slag powder self-consolidating concrete comprises the following raw materials by weight: 1-10 parts of steel slag powder; 1-10 parts of talcum powder; 5-15 parts of cement; 20-30 parts of natural coarse aggregate; 6-15 parts of recycled coarse aggregate; 20-30 parts of sand; 1.5-3.5 parts of fly ash; 2-10 parts of water; and 0.001-0.1 part of a water reducing agent. The obtained self-consolidating concrete has good fluidity, gap passing ability, and segregation resistance, and meets the strength requirement. The concrete is convenient for construction, simultaneously the concrete production cost is lowered, and the preparation method is simple, and is suitable for industrial production.

The invention discloses a bag supporting and bag holding mechanism of a secondary packaging machine. The bag supporting and bag holding mechanism comprises a mechanism base, a horizontal guide rail, a bag supporting bottom plate support frame and a bottom plate air cylinder, wherein a bag supporting bottom plate and a bag moving air cylinder are arranged on the bottom plate air cylinder, a clamp groove is formed in the bag supporting bottom plate support frame, a clamp plate air cylinder is respectively arranged on the clamp groove, in addition, a bag holding clamp plate is fixedly arranged on the plate clamping air cylinder, a sensor is arranged at the inner side of the bag holding clamp plate, one end, in the direction along the horizontal guide rail, of the bag supporting bottom plate is provided with a material pushing plate, and the outer side of the material pushing plate is connected with a push plate air cylinder. The bag supporting and bag holding mechanism of the secondary packaging machine has the advantages that the bag holding clamp plate is directly connected with the plate clamping air cylinder, and the bag holding speed is accelerated, so the work efficiency is greatly improved, the bag holding stability is improved, the bag holding clamp plate is provided with the sensor, the stroke of the clamp plate air cylinder can be regulated, the proper clamping force is ensured, the push plate pushing conveyance is used for replacing clamping conveyance, the bag holding clamp plate only realizes an exhaust position limitation effect, and the deformation and the damage of packaged articles are prevented.