148 results about "Bursting" patented technology

The flash bursting and high temperature digesting process for degumming hemp bast fiber includes pre-treatment, flash bursting and high temperature digesting to eliminate residual pectin, hemicellulose and lignin from hemp bast fiber, and raise the fiber fracturing degree and softness. The flash bursting and high temperature digesting process has ideal degumming effect, obvious non-fiber component eliminating effect and less pollution, and the degummed hemp bast fiber has high cellulose rate, high fiber fracturing degree and high fiber flexibility.

The invention discloses a method of roof cutting pressure relief of the narrow coal pillar gob side through static bursting for gob-side entry driving. According to the method, firstly, the drilling position and drilling relevant parameters of the separation distance, the diameter, the angle and the depth are determined; secondly, drilling construction and hole sealing operation are conducted; thirdly, slurry grouting of a static bursting agent is conducted, and roof cutting pressure relief is conducted through static bursting; and fourthly, gob-side entry driving is conducted. According to the method, recovery of an upper section working face and forward groove driving of a lower section working face are conducted simultaneously, and the problem of intense linkage of mine excavation is effectively relieved; and after entry-side roof cutting pressure relief, the stress environment of gob-side entry driving surrounding rock is greatly improved, surrounding rock deformation is greatly reduced in the entry driving process and after entry forming, the engineering quantity of entry supporting is small, and the repair rate is low.

The invention relates to a method for preventing rock burst through secondary pressure relief. In combination of coal-rock mass geological occurrence conditions and ground stress distribution characteristics, different water jet slotting manners are adopted for slotting coal-rock mass according to different rock burst types, and then powder charge bursting is performed. The method has the advantages as follows: after high-pressure water jet is adopted for axially grooving and radially slotting the coal-rock mass with burst hazard along a drill hole, stress of surrounding rock is redistributed, a concentrated stress zone is transferred to the deep part, and at the same time, a slot group (weak plane) formed by high-pressure water jet slots has a pressure relief function; and then, loosening blasting is performed, so that a fracture is further expanded, deformation energy of the coal-rock mass is released again, secondary pressure relief is realized, and rock burst is effectively prevented. Compared with the most common coal seam water injection and pressure relief bursting, the method has the advantages of short consumed time, good effect, wide pressure relief range and low risk.

The invention relates to a method for reducing reserved width of waterproof coal pillars of an inclined coal seam. The work plane employs external-staggered layer-staggered type tunnel layout, the air intake tunnel of the work plane is arranged along the top board of the coal seam, and the air return tunnel is arranged along the bottom board of the coal seam; the angle of the working plane is gradually uplifted to approximate horizontal from downward incline before the work plane approaches the air intake tunnel, and also the exploitation thickness of the work plane is gradually reduced to the height of the air intake tunnel, so that the problem that the reserved width of conventional waterproof coal pillars is too large; and under the prerequisite that adjacent goaves are prevented from water-bursting, the method helps to reduce the reserved width of the waterproof coal pillars and improve recovery rate.

The invention discloses a simulation tester for similar damage of tailings dam bursting, which is provided with a simulation reservoir, and the dam of the simulation reservoir is connected with a simulation cleugh. The simulation tester for similar damage of tailings dam bursting is characterized in that the bottom of the simulation reservoir at the tail of the reservoir is provided with a jacking pushrod; the jacking pushrod is arranged on a hydraulic cylinder; the simulation cleugh consists of at least two grooves connected end to end in sequence; the neighboring grooves are connected by an adjustable joint; the dam of the simulation reservoir consists of a fixed bracket and at least one movable baffle. The simulation tester for similar damage of tailings dam bursting has the obvious effects of strong compatibility, simple structure, low cost, easy maintenance, and convenient operation, can simulate tailings reservoirs with different heights and volumes, and can all obtain the data like fluid state evolution characteristics of slurry out of the burst dam, the stress field and flow field distribution rules during the moving process of slurry, and the relationship of the alluvial fan scope of slurry and sedimentary thickness with the moving distance of slurry when facing to the grooves of the tailings dam with different bursting widths, directions and slopes.

The invention discloses an automatic bursting point test instrument, which mainly comprises a temperature control system, a special reactor, an automatic sample injection mechanism, a control system and a signal and data acquisition and processing system, wherein the special reactor (a detonator on which a copper plug cap is pressed) in which an explosive sample is filled is placed in a heating furnace (a heating medium is filled in the furnace),of which the temperature is constant, to be heated through mechanical clamping handles of the automatic sample injection mechanism and the control system; when the sample burns or explodes, a contact detector and a sound sensor of the signal and data acquisition and processing system are used for signal detection; lag phase (time for burning and explosion) for the sample to burn and explode is recorded; meanwhile, the liquid level of the heating medium, namely a wood alloy bath solution, at the moment is acquired; then the bursting lag phase at other selected temperatures is tested simultaneously; and finally, the bursting point with 5s lag phase of the sample is calculated through the signal and data acquisition and processing system.

The invention provides a dual-fuel nozzle for plasma and gas-assisted atomization burning. The dual-fuel nozzle for plasma and gas-assisted atomization burning comprises a gas circuit assembly, a plasma discharging assembly, an oil filtering assembly and a gas-assisted swirl nozzle assembly. Liquid fuel passes through the oil filtering assembly and then enters an annular discharging gap of the plasma discharging assembly in the radial direction, the fuel is partially cracked through dielectric barrier discharging to form a plasma micelle which is mixed into the fuel, and instant bursting and inflammability of the plasma micelle at an outlet of the dual-fuel nozzle are utilized for strengthening atomization; one part of gaseous fuel enters the gas-assisted swirl nozzle assembly from an inlet through an annular gas cavity surrounding an external electrode so as to conduct impact assisted atomization on the liquid fuel, and the other part of the gaseous fuel flows out in a rotating mode through a gas flow guiding plate so as to achieve the shearing action on the liquid fuel, so that liquid drops are atomized deeply. According to the dual-fuel nozzle for plasma and gas-assisted atomization burning, deep fuel atomization and stable flow rotation can be well achieved, stability and completeness of burning are improved, and pollutant emission is reduced.

The invention relates to a new method for evaluating coal seam bottom water bursting. The method comprises the following steps: 1. collecting, extracting, processing and quantizing the data of the many factors of coal seam bottom water bursting; 2. using the ring theory and technical method and the extension method to determine the matter element model of coal seam bottom water bursting 3. determining the classical domain model of the bottom water bursting matter element; 4. determining the joint domain of the bottom water bursting matter element; 5. combining geological data and hydrogeological data information according to the mass observation data of the mine shaft to obtain the matter element to be evaluated, namely the various datasets of a sampling point; 6. calculating the association degree of the matter element to be evaluated in different categories; 7. determining the weighting coefficient of each main control factor of coal seam bottom water bursting; 8. calculating the association degree of the matter element to be evaluated in different safety levels; and 9. determining the bottom water bursting danger level of each matter element to be evaluated, and finally performing scientific regionalization, prediction and evaluation to the danger of coal seam bottom water bursting.

A data processing network includes a database management for a plurality of databases serviced by a server comprising a plurality of data processors. Each server data processor includes a copy of the database management system and a monitor for measuring and analyzing various parameters for each server data processor and each included database and performing various methods transparently to a user. For example, when a parameter or combination thereof indicates that a database in one data processor is inactive or requires additional resources, that database is set to an inactive state or is transferred to another data processor with greater resources, respectively. An inactive database is recalled upon receipt of a request for access to that database. A database in a data processor of greater resources can be returned to a server data processor or another data processor with fewer resources. These operations are transparent to database users and independent of user or administrator intervention.

The invention discloses a construction method for ultra-short-distance overlapped line tunnel long-distance guide pit advance control bursting. The construction method includes following steps: excavating an advance hole of an overlapped lien section; determining basic data of bursting network designing; determining bursting key parameters; determining bursting mode; constructing a bursting cloth hole of a long-distance guide pit; constructing a bursting cloth hole of a short-distance arch pit; setting bursting parameters; arranging explosive; detonating the long-distance guide pit; detonating the short-distance arch pit; reinforcing preliminary support. Aiming at the characteristic of minimum net-distance section construction, designing optimizing is majorly performed on bursting scheme, so that bursting disturbance degree is reduced. Maximum section explosive loading capacity is adjusted by selecting half-section bursting network design for sectional bursting and combining a distance between two lines of the advance hole and a following hole with requirements on bursting vibration speed, so that good construction effect is acquired.

The invention discloses a test device of tire-bursting or rapid air leakage for an automobile. N numbered air-bleed holes are drilled on a rim and air in tires is communicated with an air-bleed control valve by respective gas-guide tube through the N numbered air-bleed holes. A control valve base at one side of a control cavity B is provided with a control valve body, an air-bleed cavity body and an air-bleed cavity cover; the control valve body is internally provided with I-shaped slide blocks and the control valve body positioned among the slide blocks is provided with a air leakage port; one side of the slide block is communicated with the control cavity B and the other side thereof is communicated with the control cavity A; the air leakage cavity body is provided with N-1 numbered air leakage holes which are respectively communicated with N-1 numbered gas-guide tubes; the control valve base is provided with the air-bleed holes in a radial direction, one end of which is communicated with the n air-guide tube and the other end of which is communicated with the control cavity B by a two-phase three-way magnetic valve; and the magnetic valve realizes communication between the control cavity B and the n air-guide tube or between the control cavity B and atmosphere and is connected with a remote control switch. The invention adopts the remote control switch and the two-phase three-way magnetic valve with small flow to control opening/closing of big flow, thereby finishing the test of the tire-bursting or the rapid air leakage for the automobile.

The invention relates to a method and a system for testing the sounding balloon bursting. The method for testing sounding balloon bursting comprises the following steps: a sounding balloon to be tested is suspended on the top of a laboratory through a suspending device; compressed air of a certain pressure is conveyed into the sounding balloon through a pipeline; an air flowmeter is arranged in a pipeline for conveying the compressed air, and a pressure sensor arranged at the inner side of the sounding balloon is arranged at the end port of the joint of the sounding balloon and the pipeline for conveying the compressed air; the air flowmeter and the pressure sensor respectively collect the flow rate and the pressure of the air flowing into the sounding balloon; the flow rate and the pressure of the air are converted into electrical signals; the collected electrical signals are conveyed to a pressure computer (PC) through an electrical wire; and the flow rate of the air is directly displayed and then accumulated and processed by the PC to be formed into volume parameters to be displayed. The pressure computer detects the flow rate and the pressure of the air continuously; when the sounding balloon is burst or the bursting of the sounding balloon is tested to be qualified, the pressure computer stores and displays the volume and the pressure of the air, and data is stored into the pressure computer to be used for judging if the bursting of the sounding balloon is qualified.

A method of analyzing preforms for potential bursting during forming and filling by injecting an incompressible liquid to shape the successive heating preforms into containers and fill the containers. The method defines at least one stress parameter correlated to the internal stress of the thermoplastic material of the preform and defines a range of acceptable values for the stress parameter. The method includes analyzing each successive initial preform and each successive heated preform, determining a value of the stress parameter, comparing the determined value to a range of acceptable values, and emitting an output signal when the determined value is outside the acceptable range of values.

The invention relates to a nuclear island negative excavation circle corridor pre-split blasting method, belonging to the technical field of earthwork construction methods. The method has the following steps: excavating downward at the elevation at the heart of the nuclear island, and reserving a retaining layer; drilling holes along the inner and outer circumferences of the circle corridor at equal space interval respectively; filling flexible material into the bottom of the holes to serve as cushion layers; filling the explosive into the holes which are provided with the cushion layers and the loading depth at the orifices in three sections, wherein, the bottom part is a strengthening explosive filling section, the top part is a weakening explosive filling section, and the middle part is a normal explosive filling section; after the explosives are loaded into the holes, filling the loading depth at the orifices with conventional materials; and detonating the explosives to form cracks along the inner and outer circumferences of the circle corridor. The invention can form desired cracks along the inner and outer circumferences of the circle corridor at the predetermined location of the rock foundation so as to carry out the main bursting aiming to remove the rocks in the circle corridor; at the same time, taking into account the vibration, tolerance and other technical requirements, the invention takes corresponding reasonable measures so as to rapidly complete the construction work of the nuclear island negative excavation circle corridor with high quality.

The invention discloses a control method for improving the safety of a four wheel hub motor-driven electric car after tire bursting. Four wheels of the electric car are each provided with a hub motor for driving the corresponding wheel to rotate; each wheel is further provided with a steering motor for ensuring independent steering of the wheel; electrically-controlled hydraulic braking units are adopted to control braking force of the corresponding wheels, that is to say, single-wheel independent driving, braking and steering are achieved, and therefore a new way and a new implementation platform are supplied to safety control of the electric car after tire bursting. According to the control method, the four wheels are effectively controlled to generate necessary compensating moment on the basis of a method achieving comprehensive braking, steering and driving control over the wheels of the complete car, and then the driving safety of the electric car after tire bursting is improved. A whole system comprises a sensing layer, a control layer and an execution layer.

The invention designs a tyre burst sensor and comprises an air pressure sensing unit and a switch. Because of utilizing the properties of compression or deformation in normal tyre pressure and recovery when the tyre bursting or the tyre air pressure falling of the air pressure sensing unit, the driven switch closes to output a tyre burst signal. The tyre burst sensor can detect the tyre burst signal in the first time when the tyre bursts. Therefore, the invention not only conforms to the characteristic of strong real time in detecting the tyre burst, but also meets the requirement of long-period low power consumption steady operation of the detecting system.

The invention provides a time-domain tracking method and device under discontinuous reception and user equipment. The method comprises that before a time-domain position of a discontinuous reception start moment, bursting of a synchronization signal block and bursting of a time-domain tracking reference signal are received by activation in advance; and the time-domain is estimated according to thereceived bursting of the synchronization signal block and time-domain tracking reference signal. Configuration is carried out according to bursting of different synchronization signal blocks and bursting of the time-domain tracking reference signals, the time domain is estimated before start of discontinuous reception, power consumption of the UE is reduced, and the reception performance of discontinuous reception is ensured.

Methods, systems, and devices are described for wireless communication at a wireless device. A wireless device (e.g., station or access point) may adapt short inter-frame space (SIFS) burst parameters to improve the performance of the overall network while providing enriched user experience. A wireless device may monitor traffic conditions on the network and dynamically adapt the SIFS burst parameters associated with one or more stations based at least in part on detected variations on the traffic channel. In other examples, the wireless device may allocate a common SIFS burst parameter to be used by a plurality of wireless devices in the basic service set (BSS).

The bent rock infiltration testing equipment comprises MTS815 or 816 serial rock dynamic experiment system, cylinder, pistons sequentially set inside the cylinder, multi porous water through plate and round ring post, bottom of the cylinder having bottom plates connected with the bolts with conical press head, whose top with ring post has rock sample space and seal glue between them, bottom plate and middle of the press head having through water channel, water intake joint under the bottom plate, water through holes connected with the exhaust water pipe on the piston, rock sample inside the cylinder receiving thrust and propping force, with the sample rock bending in filtration having dramatic change to simulate the water bursting feature and verifying the bursting of water accompanied with the structural damage of the filtration unstable process. It is simple in structure, low in experiment cost, quick in seal, reliable in performance, and extensive in application.

The invention discloses a circular-rod-shaped laser crystal end face and side face combination radiating device which comprises a heat sink block, a side face compact radiating component and an end face compact radiating component. The side face compact radiating component comprises a crystal clamping component, a side face fastening bolt and a metal gasket. A first light through hole and a first hexagon screw hole are formed in the side face fastening bolt. The end face compact radiating component comprises a transparent diamond circular table, a diamond fastening piece and an end face fastening bolt. The diamond fastening piece is provided with a diamond circular table mounting hole and a second light through hole. The end face fastening bolt is provided with a third thread hole and a second hexagon screw hole. The heat sink block is provided with a circular-table-shaped through hole, a first thread hole, a cylinder hole and a second thread hole. The invention further provides a circular-rod-shaped laser crystal end face and side face combination radiating method. Circular-rod-shaped laser crystal inner heat load can be lowered, laser output power can be improved to the maximum degree, light beam quality is improved, and crystal bursting is avoided.

The invention belongs to the technical field of cassava intervarietal hybridization breeding and provides an artificial-bursting cross pollination method for cassava. 2-3 days before flowering of cassava female flowers, the female flowers are subject to artificial bursting, so that female flower stigmas are exposed; then the male flower pollen or the bud of a newly-flowered male flower, prepared in advance, is aligned to the female flower stigmas to sweep back and forth, so that the stigmas are stained with the pollen; the pollinated cassava female flowers are covered by a bag; 3-4 days after pollination, the bag is removed. The condition of mucus (nectar) secreted on the female flower stigmas is utilized as an artificial pollination medium to judge the best pollination time, so that the female flowers and the male flowers have enough time for pollination and impregnation, and the cassava fruitage ratio is improved. The artificial-bursting cross pollination method can be used for intervarietal hybridization of cassava and lays foundations for cultivating new cassava varieties.

The invention relates to a fenestrated freezing tube for storing biological tissue, which is a small tool and related to medical and pharmaceutical teaching and scientific researches, and belongs to common-use consumables in laboratories. The freezing tube is composed of a body and a sealing cover. A lower end of the body is in a circular shape, 8 small round holes with the diameter of 1.5 mm are alternatively arranged at an intermediate section in an upper row and a lower row, and two small round holes with the diameter of 1.5 mm are provided on the sealing cover. The design of the fenestrated freezing tube solves the problems that after the biological tissue is frozen by liquid nitrogen, tube bursting may occur and the biological tissue is not prone to be frozen rapidly and evenly, and therefore operation processes are more convenient and fast.