59results about How to "Save filling material" patented technology

The invention relates to a building method of a filled wall body for gob-side entry retaining of a large-inclination coal seam, which comprises the following steps: erecting dense individual props on the entry retaining side on the rear part of a heading stope to retain roadway space on the rear part of the heading stope, erecting anti-tilting side supports along the dense individual props, laying reinforcing fabric and high-strength fiber cloth on the side of the dense individual props close to the gob, and building a structure used for intercepting waste rocks in the gob; and when the dropped waste rocks in the gob automatically slide along the large-inclination footwall to the waste rock blocking structure formed by the reinforcing fabric and the high-strength fiber cloth under the effect of the dead weight and pile up to a certain degree, grouting and cementing part of the dropped waste rocks near the entry retaining side for consolidation, thereby forming the filled wall body, and repeating the steps in sequence along with the advancement of the heading stope until the whole filled wall body for gob-side entry retaining. The invention has the advantages of simple method and high working efficiency, the filled wall body built in the method is of high strength and is also economical and practical, and the method is suitable for the building of the filled wall body for gob-side entry retaining under the high-inclination condition.

The invention discloses a method of brazing alloy extrusion and backflow stuffing for carrying out stirring and friction of a welding keyhole. The method comprises the following steps that brazing alloy is preset in a keyhole, then a stuffing block is added in the keyhole, a T-typed stuffing block is subjected to rotation and friction through a needleless stirring head and is compressed down, the brazing alloy is heated to be softened, liquid brazing alloy is extruded and stirred by the stuffing block in an enclosed environment formed by the keyhole and the stuffing block, the liquid brazing alloy is stuffed in a driving and flowing way, and the liquid brazing alloy is enabled to be filled into a gap on the bottom of the keyhole; and due to the property of non-compression of the liquid brazing alloy, the liquid brazing alloy back flows along a side wall interface upward to stuff the remaining gap of the side wall, the side wall interface is dissolved, and compact alloying of the side wall and the bottom interface is realized. When the welding keyhole is repaired in batches, the replacement of tools is not needed, reduction of a welded keyhole does not exist or is extremely small, stuffing materials are saved, preset operation of the brazing alloy and the stuffing block is convenient, and the shaping of a surface of a stirring area is smooth.

A gob-side entry retaining method using high-water material filling columns belongs to the field of mine supports. With advancing of actual mining working faces, filling column structures are produced near end hydraulic supports at designed intervals, and two to three single hydraulic supports are fixed on the periphery of each filling column structure to assist forming of filling columns; and evenly-mixed high-water material slurry is filled into constructed filling column structures, and the single hydraulic supports are removed 4 hours after the filled slurry solidifies to finish construction of the filling columns. Road-side supports are formed by the filling columns in a row, the roadway is retained, and gob-side entry retaining is achieved. By the method, a huge amount of filling materials is saved, downhole auxiliary transport amount is low, and cost is low. The constructed filling columns are simple in construction and high in bearing capacity. An operator can operate below a top plate supported by bolt-mesh-cable in the roadway without entering a gob, and accordingly safety and reliability are high.

The invention provides a TIG welding gun. The TIG welding gun comprises a water electric pipe positioned in the axis position, a core rod arranged at the outer periphery of the water electric pipe, a tungsten electrode clamp fixed at one end of the core rod, an electric conducting connection base fixed at the other end of the core rod and connected with the water electric pipe, a water cooling jacket arranged at the outer side of the core rod, an insulation block fixedly connected between the water cooling jacket and the electric conducting connection base in the axial direction, a shell fixed at the outer periphery of the water cooling jacket, and a water outlet pipe fixed on the electric conducting connection base. An isolation part is arranged in the core rod near the tungsten electrode clamp. The water electric pipe extends to the position of the isolation part, and is provided with a first water outlet hole penetrating through in the radial direction. A first water cavity communicated with the first water outlet hole is formed between the core rod and the water electric pipe. The electric conducting connection base is provided with a first water inlet communicated with the first water cavity. A second water cavity is formed between the water cooling jacket and the shell. The electric conducting connection base and the insulation block are formed with a first communication hole for communicating the first water inlet with the second water cavity and a second communication hole for communicating the second water cavity with the water outlet pipe.

The invention discloses an extra-thick coal seam strip-type filling and mining method relying on steel mould trolleys. The extra-thick seam strip-type filling and mining method is used for 'three-under' extra-thick coal seam mining. After coal seam mining, an upper layer hard roof forms a cantilever plate structure, under the cover of the stable cantilever structure, a row of steel mould trolleys arranged parallel to the stope face jointly form a strip filling template to fill a goaf closely adjacent to the stope face. According to the extra-thick coal seam strip-type filling and mining method, the traditional steel mould trolley for tunnel lining is modified, the construction technology is simplified, the planned filling space of the goaf is filled at full height at one time, and false roof laying of slicing filling is avoided; a partition wall is not needed to be constructed, partial filling can be achieved, and filling materials are saved; a mode of combining filling and mining is adopted, filling and mining are pushed forwards simultaneously, coal pillars are not needed to be reserved and arranged, secondary disturbance caused by recovering the coal pillars is avoided, the subsidence of an overlying rock is strictly controlled, and the safety of ground buildings is ensured; and standardized and high modular steel mould trolleys are selected, and can be adapted to filling spaces with various sections and reused.

The invention provides an anti-burn and anti-distortion cable based on flame-retardant inert gas, and relates to the technical field of cables. The invention discloses an anti-burn and anti-distortioncable based on flame-retardant inert gas. The device comprises an outer package, an inner cavity is formed in the outer package, a first fireproof coating is fixedly installed on the inner side of the outer package, an inner package is fixedly installed in the outer package, a connecting rod is fixedly connected between the inner package and the outer package, and a second fireproof coating is fixedly installed on the periphery of the inner package. The invention discloses an anti-burn and anti-distortion cable based on flame-retardant inert gas. Concentrated heating of internal wires is avoided, torsion generated by twisting can be buffered, the phenomenon that the wires are broken due to long-time excessive twisting is avoided, internal filling materials are saved, the flexibility of the cable is improved, the effect of fire on the cable is relieved, fusing of the internal wires is relieved, and time is bought for cutting off a cable power source.

The invention discloses an inorganic mineral insulation metal sheath fireproof and waterproof cable comprising a cable core. The cable core is formed by intertwisting a plurality of fan-shaped wire cores. Each fan-shaped wire core is composed of a fan-shaped copper conductor and a fan-shaped inorganic mineral insulating layer wrapping the fan-shaped copper conductor in an extruded mode. Ointment is filled in gaps in the cable core. A ceramic silicone rubber lapped-wrapping band is arranged outside the cable core. A corrugated metal sheath is arranged outside the ceramic silicone rubber lapped-wrapping band. A polyisobutylene waterproof film is arranged outside the corrugated metal sheath. The inorganic mineral insulation metal sheath fireproof and waterproof cable of the invention has advantages such as superior fireproof performance, a good waterproof effect, relatively good overall flexibility, safety, pro-environment, high corrosion resistance, convenient installation, simplicity in manufacturing, etc.

The invention relates to a casing inlay that the brick, assistant tendon burying slot, side protruding table and protruding table slot form the basic section. The large surface protruding table, main tendon burying slot, anchor fixed pulling tendon and brick material form the adjusting section. The basic section and the adjusting section combine together and form the casing inlay.

The invention discloses a three-core flat cable with a small outer diameter. The cable is of a flat structure, two paratactic phase wire cores are arranged in the center of the cable, a circle of ground wire core conductors are arranged outside the phase wire cores side by side, a wrapping tape is wrapped around the ground wire core conductors, and a protecting sleeve is wrapped around the wrapping tape in an extruded mode. The three-core flat cable has the advantages of being capable of being repeatedly moved, bent and vertically used, compact in structure, small in diameter and easy to machine, achieving convenient construction and the like.

The invention discloses a topological optimization method for an interval contraction sound insulation structure, which comprises the following steps of performing acoustic modeling on the interval contraction sound insulation structure according to a Helmholtz equation, and proposing a new interpolation function for continuous material interpolation of density and volume modulus by adopting a topological optimization method based on a variable density method. A constraint condition of the volume fraction of the material in the design domain is introduced, sensitivity analysis is carried out on an objective function and the constraint function by using an adjoint method by taking the minimized quadratic sum of the transmission sound pressure of the target frequency band in the evaluation domain as the objective function, and the objective function is optimized by using a moving asymptotic line method to obtain the optimal distribution of the solid material in the design domain; and finally, broadband sound insulation of the ventilation sound barrier in a limited space is realized. The method gets rid of the traditional thought of designing sound insulation structure parameters by experience, takes sound insulation frequency band widening as a target, and reversely designs material distribution by means of a topological optimization algorithm to obtain the optimal sound barrierwith the characteristics of broadband, ventilation, light weight and the like.

The invention discloses a four-core flat cable with a control cable core. Power and a control signal can be transmitted at the same time without dependency. The cable comprises a power cable core and the control cable core, wherein the power cable core and the control cable core are arranged in parallel in a towed mode, and soft plastic or chemical fiber materials are adopted for the hollow part between the power cable core and the control cable core. Three phase line cores are arranged in parallel in the center of the power cable core in a towed mode, multiple ground wire core conductors are arranged in parallel on the peripheries of the three phase line cores, an insulating layer is arranged between the phase line cores and the ground wire core conductors, and the ground wire core conductors are wrapped with a master sheath in an extruded mode. The cable is compact in structure, small in outer diameter, capable of being moved repeatedly, bent and used perpendicularly, easy to machine and convenient to construct, and occupies less space.

The invention discloses an insulation and explosion-proof system for an aircraft fuel tank and the installation technology and application thereof; the insulation and explosion-proof system comprises a box body and insulation and explosion-proof material units arranged in the box body; the oil outlet on the bottom of the box body is provided with a steel mesh sheet so as to prevent foreign matters from flowing into the combustion system through a pipeline; the insulation and explosion-proof system is good in filling uniformity and compaction, uses less materials, thus saving engineering construction time, and reducing construction cost and discharge and disassemble difficulty; more importantly, the insulation and explosion-proof system can effectively save oil gas losses, can reduce pollutions on the atmosphere environment, and can better improve the box body safety.

The invention discloses a four-core compound cable with control line core pairs. The four-core compound cable with the control line core pairs comprises a cable core, wherein the cable core is formed by intertwisting three fan-shaped phase line cores in the center and a wrapping belt layer wrapping the phase line cores, a cable core layer wraps the cable core, an outer sheath is arranged outside the cable core in an extrusion mode, and the cable core layer is composed of a plurality of ground wire cores and at least one control line core pair which are concentrically distributed outside the cable core side by side. The four-core compound cable with the control line core pairs is small in signal interference, can simultaneously transmit electricity and control signals, enables wires to be arranged more reasonably and more compactly, and is compact in structure, small in outer diameter, easy to process and convenient to construct.