482 results about "Cross cut" patented technology

A hybrid synchronous electric machine driven by the transverse magnetic flux has a rotor and a stator, the rotor armature has a massive cogged iron rings (12) in close vicinity of active parts of the motor, and cogged iron rings (14, 15) as component parts of the rotor are provided with cross-cut insulating gaps. Eddy current losses are low because eddy currents in cogged iron rings are impeded by cross-cut insulating gaps therein. Eddy currents in all passive parts of the motor (rotor armature (11), stator armature (1), ball bearing (9) and the like) are negligible since the current induced in the copper ring (12) neutralizes all the dissipated magnetic flux outside the active area of the motor. A hybrid synchronous electric machine which has low eddy current losses and high energy efficiency can be realized.

The invention provides a verisimilitude briquette coal and gas outburst simulation test device and method. Under the condition of the stress and gas pressure effects being accompanied by top plate motion, energy transfer and gas continuous supply, the coal body has three mechanics zones, receives the top plate effect and achieves the gas zoning distribution features, the coal and gas outburst evolution process in front of the work surface is really simulated. The device consists of a support frame, a cavity, a cover plate, a stress loading system, a gas injection system, a parameter recording system and a sealing opening. The three-zone stress is loaded and simulated through an oil cylinder in a zoning way; a cover plate with different thicknesses and rigidities simulates the top plate; the gas is sealed through a sealing strip between the cover plate and the cavity, so that the gas can maintain the zoned distribution; the coal wall delay outburst is exposed through screen net opening sealing simulation; the sealed sealing opening is suddenly opened to simulate the rock cross-cut coal uncovering outburst, and paraffin melting or hole drilling is used for simulating the digging outburst. The device and the method have the advantages that the coal and gas outburst environment, the influence factor, the boundary condition and the evolution generation process can be really simulated; the roadway-side stress and gas coupling effect and the evolution process can be simulated.

The invention relates to a rapid rock cross-cut coal uncovering process and an outburst prevention method. The rapid rock cross-cut coal uncovering process comprises the following steps: performing lane drill site construction advance borehole during rock drivage period, performing penetration drilling to measure the gas pressure of the coal seam and rapidly measuring the gas content, the mechanical property of the coal and other parameters by utilizing extraction drilling and sampling under the conditions that the rock gangway construction is not influenced and the coal seam to be uncovered is subjected to gas interception and extraction in advance, and realizing the outburst danger of the multi-index prediction coal seam; increasing the specific coal and rock mass curing measures in addition to the gas outburst prevention measures with the uncovering related regulations and standard requirements, so that the rock cross-cut is excavated by employing an integrated excavator after the rock cross-cut uncovering working face is subjected to complete outburst removal, and rapid rock cross-cut coal uncovering is realized. The whole set of coal uncovering process and the outburst prevention are used for the experimental coal mine 937m roadways, and 18 layers of coal are uncovered totally, so that the whole construction period is shortened by 1.63 years and is only 1/3 of the expected coal uncovering time. The method is easy and convenient to operate, safe in construction, short in overall coal uncovering time and good in outburst prevention effect and has wide practicability.

A hand grip and arm protection device composed of a water-resistant and stain-proof material, having temperature control characteristics and having a pair of sheets, with each sheet having a textured, recessed imprint on one surface providing a non-slip contact surface, while the opposite surface of the sheet, composed of a close fabricated fabric, is affixed to the sheet of textured, non-slip contact surface material. The fabric sheet of nylon/polyester composition is affixed to the non-slip contact surface sheet composed of a chloride rubber composition. The two-piece pair of sheets are sewn together by means of a zigzag lock stitch employing nylon thread. Both exterior surfaces include a cross-cut textured recessed imprint.

The invention discloses a simulation test system of coal-gas outburst during rock cross-cut coal uncovering, comprising a box provided with an opening at the top thereof, wherein the opening is equipped with a loading steel plate; a top plate and a bottom plate are paved in a closed cavity; a coal layer is paved between the top plate and the bottom plate; a slant angle is formed between the coal layer and the horizontal plane; an outburst simulation roadway is stretched in the bottom plate till being intersected with the coal layer; a notch attached to the coal layer is arranged at the intersection of the outburst simulation roadway; a diaphragm is arranged at the notch; an outburst opening and a gas balance opening are arranged at a part of outburst simulation roadway, which is exposed out of the box; the outburst opening is provided with a quick-opening seal structure; the gas balance opening is communicated with an air pressure tank; surface inflatable structures are respectively arranged on the contact surface of the coal layer and the top plate as well as the contact surface of the coal layer and the bottom plate; and the surface inflatable structures are communicated with a gas pressure tank. According to the invention, a mechanical release-diaphragm rupture method is adopted to ensure that the whole-process simulation of the coal-gas outburst during the rock cross-cut coal uncovering is realized.

The invention discloses a method for reinforcing cross-cut coal uncovering at an outburst-prone coal seam and is particularly suitable for cross-cut quick coal uncovering at a coal seam having outburst dangers and a horizontal thickness of less than 8 meters in a coal mine. The method comprises the following steps: firstly, drilling and pre-extracting gas in a coal seam in front of a cross cut to reduce the gas content and gas potential of the coal seam; manufacturing an reinfrocing ring having a thickness which is 0.4 to 1 time of that of the cross cut on the periphery of the cross cut and using an anchor cable for joint reinforcement to improve the reinforcing effect of the coal seam and realize safe coal uncovering; drilling discharge holes inside the reinforcing ring, controlling distances within 4 to 8 meters on the two sides of a laneway and connecting pipes to drain the gas, reduce gas pressure and the destructive effect of a high gas pressure on the coal seam; and after the drainage of gas, using related gas discharge holes as injection holes and injecting a reinforcing material around the cross cut to reinforce coal rocks, form a reinforcing structure with a framework and improve the reinforcing effect. The method can reduce outburst elimination work amount by 20 to 40 percent under a condition of ensuring safe coal uncovering, reduce gas drainage time construction period and improve safe coal uncovering speed by 25 to 50 percent.

The invention provides a full-automatic edge trimmer, comprising a machine frame, a control system, a servo motor, a gas cylinder, a stepping motor rectifying device, wherein the upper part of the machine frame is provided with a positioning and detecting mechanism, a cross-cut trimming mechanism and a vertical-cut trimming mechanism in turn from left to right; the positioning and detecting mechanism comprises a left color code optical fiber sensor, a middle color code optical fiber sensor and a right color code optical fiber sensor which are arranged at interval; the control system comprises a programmable logic controller; the signal output ends of the left color code optical fiber sensor, the middle color code optical fiber sensor and the right color code optical fiber sensor are respectively connected with the signal input end of the programmable logic controller; and the control signal output end of the programmable logic controller is connected with the control signal input ends of the gas cylinder, the servo motor and the stepping motor rectifying device. With the adoption of the full-automatic edge trimmer provided by the invention, PVC cards at the upper layer, the middle layer and the lower layer are processed to form right-angle depending references of which the specifications are same, so that the marks can be printed without manpower, and the efficiency of the packaging process is improved.

A tube cutting device comprises the frame, tube fastening rack and cutting torch enabling the turn of 180 degree of the tube, a low speed rotating shaft parallel with the cut round tube axis reciprocating along the axial, the deflector rod cross bar of the drive hinged with the floating shaft, a high and low location continuously adjustable along the support axial direction, with one end of the support cup jointing with the thrust pole of the floating shaft whose front end having a centripetal cutting torch. It can realize the cross cut, oblique, cross cut eccentric, and oblique cutting, with convenient usage and adaptable diameter, easy for production and cheap in cost, especially suitable for the mass transversal line cutting.

A flexible cutting filament or wire is led through the carpal tunnel, beneath the transverse carpal ligament, by a passer. Thereafter, the opposite ends of the wire are secured in an instrument which tightens the wire and may be used to move the wire as a cutting tool to transect the overlying ligament, while preserving surrounding tissues. The small wire diameter enables minimally invasive techniques to limit post-operative pain and speed recovery.

A panel saw has a first cutting blade for cutting stock in a first axis and a second cutting blade for cutting the stock in a second axis. The first blade moveable from a cutting position to a position in which stock can be slid between the cutting blade and a supporting frame of the panel saw. The panel saw allows repeated cross cuts and rip cuts without changing the cutting location of the first cutting blade. A control system is configured to retract the first cutting blade from contact with the stock if the current draw exceeds a value. The control system may also retract a cutting blade when it senses the end of a panel being cut.

An active energy ray-curable ink which contains: polymerizable compounds containing a monofunctional polymerizable monomer a homopolymer of which has Tg of 90° C. or higher, wherein a cured product obtained by forming a coating film having an average thickness of 10 μm on a polycarbonate substrate using the ink, and 15 seconds later, and applying active energy rays having a light quantity of 1,500 mJ/cm² to the coating film to cure satisfies the following (1) and (2):

• (1) a stretchability of the cured product represented by the following equation is 2 or greater, when the cured product is stretched by a tensile tester at a tensile speed of 20 mm/min, and temperature of 180° C., and

Stretchability=(length after tensile test)/(length before tensile test)

• (2) adhesion between the substrate and the cured product as measured by a cross-cut test in accordance with JIS K5400 is 70 or greater.

A machine for forming, filling, and sealing sacks has an unwinding device for a plastic tube, a cross-cutting device that cuts the tube perpendicularly to its principal axis of symmetry and creates tubular pieces in the process, a bottom forming means for forming a sack bottom at one end of the tubular piece, transport equipment to transport the resulting sacks through the machine, a filling station with a feeding element for filling the product in the sack, means of reducing the distance between the product discharge opening of the feed element and the bottom of the sack to be filled, and sealing means to seal the filled sack. The means of reducing the distance is a sack lifting device with which the sack can be lifted in the filling station such that an upper edge of the sack is located above the product discharge opening of the feed element.

In order to provide good format variability of printed products and economic utilization of the printing material, a web is supplied to a cross-cutting device and cut up into sheets with different cut lengths corresponding to heights of printed pages in a sequence.

The invention discloses a combined rock cross-cut coal uncovering method which is particularly suitable for quick rock cross-cut coal uncovering of outburst dangerous coal seams in underground coal mines. When a cross cut is tunneled to be at a vertical distance of 10 m from coal seams, a drill site is directly constructed in the cross cut; the coal seams are constructed and holes are drilled in the drill site; the drill holes are arranged at intervals by slotting drill holes and general drill holes; the uniform pressure relief of coal bodies is realized through the combined arrangement of the slotting drill holes and the general drill holes. After the drilling operation is finished, pipes are connected for extraction and drainage to reduce the gas content and the gas potential in the coal seams. After the gas extraction is qualified, the slotting drill holes are used as slurry injecting drill holes to inject cement mortar in the coal bodies for strengthening the coal bodies, so that the combination of slotting pressure relief and reinforcement is realized. Under the condition of guaranteeing safe coal uncovering, through the adoption of the method, the outburst removing engineering amount can be reduced by 30-40%, the gas extraction time and the coal uncovering period can be shortened, and the safe coal uncovering speed is increased by 40-50%.

The invention discloses a hydraulic fracturing and grouting solidification combined rock cross-cut coal uncovering method which includes that when roadway drivage reaches a 10m coal layer vertical distance, fracturing holes of a coal layer are drilled, the coal layer is subjected to hydraulic fracturing, and the water injection amount reaches the preset value after above 3MPa pressure drop appears in fracturing; a plurality of grouting holes are drilled when the roadway drivage reaches a 5m coal layer vertical distance; coal layer methane gases are extracted through the fracturing holes and the grouting holes; the coal layer is subjected to quantitative grouting through the grouting holes with grouting pressure to be above 15MPa; and roadway drivage is continued after grouting solidification, and rock cross-cut coal uncovering is completed. Single hole grouting amount includes grouting hole grouting amount M1 and coal layer permeation grouting amount M2 and is calculated according to M=M1+M2=rho*eta/K *(pi*D<2>/4 *L +pir<2>*l*P)*10<-6>, wherein rho is a grouting density, eta is a storage coefficient, K is a grouting foaming expansion rate, D is a drilling diameter, L is grouting hole length, r is a penetration radius of slurry in the coal layer, l is length of the grouting holes in the coal layer and p is a coal layer porosity. The hydraulic fracturing and grouting solidification combined rock cross-cut coal uncovering method has the advantages of being capable of fast and safely performing rock cross-cut coal uncovering, avoiding re-handling, and improving social benefit.