931results about How to "Improve explosion-proof performance" patented technology

The invention provides a ladle permanent lining pouring material capable of rapid roasting. The pouring material mainly comprises 45-75 parts of high bauxite, 10-20 parts of high-alumina hollow spheres, 3-5 parts of cyanite powder, 3-5 parts of alumina micro powder, 5-7 parts of silica micro powder, 3-5 parts of pure calcium aluminate cement, 0.5-1.5 parts of basic aluminium lactate powder, 0.02-0.06 part of metal aluminium powder, 0.1-0.3 part of organic fibres, and 0.1-0.3 part of water reducer. The pouring material capable of rapid roasting, provided by the invention, has the characteristics of being high in strength and refractoriness, good in thermal shock resistance, low in volume density and thermal conductivity, and considerable long in service life.

The invention discloses an anti-explosion multi-component dynamic air distribution device and method. The device comprises a low-pressure air distribution system 15, an air compression generation device 16, a pressurization system 17, a vacuumization system 18 and a filling system 19. Through the adoption of a back pressure valve, the pressure of gas at the gas outlet end of the back pressure valve is stable before the gas enters a gas mixer, so that an anti-explosion effect is achieved; due to the adoption of a variable frequency diaphragm compressor, product gas is high in purity and free of impurity gas pollution; moreover, the pressure in the low-pressure air distribution channel is stabilized in a safe pressure range by adjusting the working frequency of the variable frequency diaphragm compressor to achieve the anti-explosion effect; flow control ranges of n mass flow controllers are distributed in a trapezoidal shape for real-time control on gas flow, so that the air distribution precision is improved; air generated by the air compressor is utilized as a diluent gas channel, so that the cost is saved; an alarm function can be performed in an air distribution process.

The invention provides a coal mine transportation system comprising a power system, a tensioning device, a guy cable, a shuttle car, a hanging rail, at least one lifting device, a plurality of groups of guy cable spacing components and a rope return wheel, wherein the shuttle car and the lifting device are hung on the hanging rail and are in sliding connection with the hanging rail; the lifting device is mounted and connected with the shuttle car; the groups of guy cable spacing components are fixedly connected with the hanging rail; the rope return wheel is mounted and connected to the tail end of the hanging rail; the guy cable penetrates the power system and the tensioning device, and further penetrates the guy cable spacing components and the rope return wheel; and the head and the tail of the guy cable are both fixedly connected with the shuttle car. The coal mine transportation system is low in cost and noise, reliable in performance and high in anti-explosion effect.

The invention features the following: installing a front ring of the widow glass at the front of the outer tube; the front ring closely fits the outer tuber via a seal ring; the rear cap at the rear portion of the outer tube uses a seal ring to closely fit the outer tube; on the rear cp, a control valve used for injecting gas into the outer tube is mounted. The sealing level of the invention can reach IP67 protection level.

The present invention discloses a porous polypropylene modified fibre for explosion-proof concrete. It is characterized by that said fibre is made up by using polypropylene chip whose melting index is 16-60 as main body raw material, adding 0.1-1% of distearic amide surfactant and 0.1-6% of inorganic ceramic micro-powder and making all the above-mentioned materials undergo the processes of mixing, granulating, high-pressure spinning and multistage drawing.

The invention provides a blast-winning, coal loading, coal conveying and anchor rod-timbering mechanical integrated operating method and device. And the device mainly comprises: hydraulic system, hydraulic control table, track walking part, coal loading and conveying part, timbering part, and hydraulic anchor rod machine, and the method uses integrated device, scraper conveyor and gate coal conveyor; and its drivage circulating speed is 1m to 1.5 m, blast-winning and after the fumes have settled, making the integrated device enter into the operating site, and after completing coal loading and conveying, making anchor rod timbering; after completing the anchor rod timbering operation, making the integrated device exit the operating site and over 20 meters distant from the operating site, and then making drilling and blasting operation. And it improves explosion level of blast winning and resources recovery, and reduces operators.

The invention discloses a gas sensor test system. The system comprises a gas distribution unit, a gas sensitivity measuring device and a test unit. The gas distribution unit comprises an air supply unit, more than one tested gas supply units, and a gas mixing chamber for uniformly mixing air and the tested gas. The gas mixing chamber is communicated with the gas sensitivity measuring device, and is provide for inputting the mixed gas to the gas sensitivity measuring device through a pipeline. The test unit comprises a data acquisition device, a temperature control instrument connected with the data acquisition device, a tail gas analysis device and a computer, wherein the data acquisition device respectively forms electrical connections with the air supply unit and the gas sensitivity measuring device, and the tail gas analysis device is communicated with the gas sensitivity measuring device through a pipeline.

The invention discloses a 200MPa grade anti-bursting reactive powder concrete under construction site curing conditions and a preparation method thereof. The concrete is prepared from the following components by weight: 1 part of cement, 0.25-0.35 part of modified silica fume, 0.15-0.35 part of ground slag, 1.0-1.5 parts of quartz sand, 0.030-0.040 part of a polycarboxylate superplasticizer, 0.15-0.25 part of steel fiber, 0.00175-0.003 part of polypropylene fiber, and 0.20-0.25 part of water. The 200MPa grade anti-bursting reactive powder concrete provided by the invention has the advantages of simple process and strong operability, is suitable for extensive site construction and curing, and is in favor of popularization and application of reactive powder concrete. The use of slag and the non-high temperature steam curing conditions have important significance for protecting the environment and saving energy.

The invention discloses an explosion-proof hybrid electro-hydraulic integrated actuator for a valve. The actuator comprises electrical control box, double-acting cylinders and hydraulic power unit; with a piston displacement of the displacement sensors and detectors for detecting the pressure of the pressure on the double-acting cylinder sensor, double-acting cylinders driven by a hydraulic power unit telescopic movement; hydraulic power unit according to the motor, pump, manifold, valve blocks flow matching, piping and other integration body, the valve of the invention hybrid integrated electro-hydraulic explosion actuators, cylinders comes with displacement and pressure testing, to create conditions for the realization of high-precision positioning of double-loop control, modular design, functional and reasonable layout, and enhance the degree of integration and explosion-proof performance.

The invention discloses a storage iron runner castbale produced by adopting a waste iron runner material. The storage iron runner castable comprises the following components in parts by mass: 15-20 parts of waste iron runner material, 20-30 parts of brown fused alumina particles, 3-5 parts of brown fused alumina fine powder, 5-10 parts of electric smelting compact corundum particles, 2-5 parts of electric smelting compact corundum fine powder, 3-5 parts of magnesia-alumina spinel, 10-20 parts of silicon carbide, 2-5 parts of silicon powder, 1-2 parts of activated aluminum oxide micro powder, 4-6 parts of crystalline flake graphite, 0.5-1 part of a silane coupling agent, 3-8 parts of aluminate cement, 1-4 parts of a compound water reducer, 1-2 parts of a compound antidetonant, and 1-2 parts of an antioxidant. The storage iron runner castable makes full use of the waste material, thus greatly lowering comprehensive cost; due to the materials of the different particle sizes, the construction efficiency is improved; for the addition of the crystalline flake graphite and magnesia-alumina spinel powder, the molding density of the castable is improved, the castable is promoted in sintering, and the density, strength, volume stability and residue resistance of the castable are improved.

The invention discloses a mining high-voltage frequency converter with an explosion-proof type. The frequency converter comprises a phase-shifting transformer unit explosion-proof box and a power unit explosion-proof box; a phase-shifting isolation transformer and a heat radiation system are arranged in the phase-shifting transformer unit explosion-proof box; and a plurality of sets of power units, a control unit and a heat radiation system are arranged in the power unit explosion-proof box, wherein the plurality of sets of power units are in series connection. A high-tension side of the phase-shifting isolation transformer is in series connection with a three phase high voltage power network; the plurality of sets of power units are respectively connected with a low tension side of the phase-shifting isolation transformer; and the power units and the control unit are connected by a fiber. According to the invention, all assembling combination surfaces of the phase-shifting transformer unit explosion-proof box and the power unit explosion-proof box are constructed into sealing structures, so that an external environment is isolated from the phase-shifting transformer unit explosion-proof box and the power unit explosion-proof box; therefore, it can be avoided that corresponding chain explosions happen at high-risk occasions including a coal mine and the like and an explosion-proof effect is good. Besides, a control signal is transmitted by a fiber, so that an electrical isolation capability and an anti-electromagnetic interference performance are good.

The invention discloses an explosion-proof coil which comprises a winding (1) and a winding shell (2). A cable mounting part (3) and a circuit board (4) are arranged on the winding shell (2). A leading wire (5) is installed on the circuit board (4). A protection sleeve (6) is arranged outside the leading wire (5). A housing (7) is further fixedly connected outside the winding shell (2). The top end of the housing (7) is higher than the bottom end of the protection sleeve (6). The housing (7), the cable mounting part (3), the circuit board (4), the leading wire (5) and part of the protection sleeve (6) are formed into a whole through encapsulation. Compared with the prior art, encapsulation of the bottom end of the protection sleeve (6) is achieved through the explosion-proof coil, the electric insulation performance of the joint of the circuit board (4) is guaranteed, the explosion-proof performance of the explosion-proof coil is improved, the explosion-proof coil is made to meet the national certification requirements for explosion-proof coils, and meanwhile, market requirements for the explosion-proof coil of an electronic expansion valve can also be met. The invention further provides the electronic expansion valve with the explosion-proof coil applied and a machining method of the explosion-proof coil.

The invention belongs to the technical field of a refractory material technology for steel ladles in the ferrous metallurgy industry, and discloses an explosion proofing castable for a steel ladle working layer. The explosion proofing castable is characterized in that a composite explosion-proof agent and a composite water reducing agent are introduced in the castable, and the composition and the mixing ratio of the castable are adjusted, so that the inner structure of a material is improved, the air permeability and the strength at an intermediate temperature of the material are improved, the problem that the castable is peeled, separated and then cracked during being baked can be effectively avoided, the resulting loss of a user can be avoided, and simultaneously, the baking time is reduced, the energy is saved, and the pollution is reduced.

An adjustable explosion relief valve of a storage battery comprises a valve body, an adjusting nut, a pressure spring, a piston, a seal ring, a plug pin and a plug pin spring, wherein the adjusting nut is arranged at the back end of the valve body and connected with one end of the pressure spring arranged inside the valve body, the other end of the pressure spring is connected with one end of the piston, the other end of the piston is connected with the seal ring, the plug pin spring is arranged in the valve body and fixedly connected with the plug pin, a pit corresponding to the plug pin is arranged on the upper portion of the piston, a first channel is arranged on the inner side of the front end of the valve body and communicated with a cavity where the plug pin is arranged through a second channel, a through hole is arranged on the seal ring, and a decompression hole corresponding to the through hole is arranged on the valve body. The adjustable explosion relief valve has the advantages of being convenient to use, high in practicability, and capable of effectively controlling the inside pressure of the storage battery and preventing the storage battery from exploding due to the overhigh pressure inside.

The invention provides a blowback fast explosion suppression device for a coal mining working face, and relates to a blowback fast explosion suppression device, which is used for solving the problem that shock wave and flame caused by explosion can not be effectively prevented in the existing coal mining working face. The blowback fast explosion suppression device is equipped with an explosion suppression door and two explosion suppression windows; and in case of explosion, a control system controls the explosion suppression door and the two explosion suppression windows to be closed so as to play the role of suppressing explosion. The blowback fast explosion suppression device is applicable to a roadway of a coal mine.

The present invention provides a small, low power consumption ultrasonic flow velocity meter. The burst signal generation section 110 generates two kinds of burst signals with a phase difference and sends these burst signals to a pair of transmission/reception ultrasonic transducers 6 and 7 located on the upstream side and downstream side of the conduit to be measured 9. Upon reception of the corresponding burst signals, the pair of the transmission/reception ultrasonic transducers 6 and 7 convert the burst signals, send ultrasonic waves with a phase difference to the conduit to be measured 9, receive the ultrasonic wave sent by the other transmission/reception ultrasonic transducer and propagated through the conduit to be measured and convert the ultrasonic waves to received signals. These received signals are binarized through the binarization circuits 16 and 17, exclusive-ORed by the exclusive-OR circuit 30 and converted to a phase difference signal indicating a phase difference and the flow velocity of the conduit to be measured 9 is measured based on this phase difference signal.

The invention discloses non-stick aluminum castable. The non-stick aluminum castable contains a pouring main ingredient and an admixture, wherein the pouring main ingredient is prepared from fused quartz particles, aluminum silicate fiber residue balls, fused quartz powder, aluminate cement, sodium tripolyphosphate, alundum powder and a compound additive; the admixture is prepared from polypropylene explosion-proof fibers and citric acid. Compared with the prior art, the invention has the beneficial effects of low cost, high performance, large wetting angle, low coefficient of thermal expansion, high scouring resistance and capability of prolonging service life.

The invention relates to a drilling rig for construction of anchor rods and cables with two arms on a movable lifting platform, which includes a crawler walking part, a body platform, a lifting platform, a platform lifting device, a drilling arm part, a hydraulic drilling rig part, a temporary support device, a hydraulic The operating system, the pumping station part and the main motor; the main feature is that there are two stages of pedals on the lifting platform, which are respectively a primary rotary pedal and a secondary flip pedal; the temporary support device includes a column, an angle adjustment cylinder, and a beam , telescopic oil cylinder, telescopic beam and supporting part; and the lifting platform adopts three lifting oil cylinders and three-point support, four-link integral top beam, parallel movement, vertical lifting and other structures; It also has the functions of construction blasthole, gas discharge hole, water exploration and discharge drilling, better temporary support capacity, ultra-high roadway support and other functions, adopts full hydraulic system transmission, explosion-proof performance and safety Good performance.

The invention discloses a piston type hydrogen conveyor for a fuel cell. The cylinder bodies on both sides of a cylinder piston are respectively provided with position sensors and are respectively provided with a hydrogen inlet and a hydrogen outlet; the hydrogen outlet of a buffer tank is connected with the hydrogen inlet of the fuel cell by a water segregator; the hydrogen inlet of the buffer tank is connected with a path of pipeline of a high-pressure hydrogen source, the other path of pipeline of the high-pressure hydrogen source is connected with the hydrogen inlet at one side of the cylinder by a hydrogen inlet solenoid valve, the hydrogen outlet on the same side of the cylinder body is connected with the buffer tank by a hydrogen outlet solenoid valve, the hydrogen inlet on the cylinder body on the other side of the cylinder piston is connected with the hydrogen tail discharge port of the fuel cell by the hydrogen inlet one-way valve, the hydrogen outlet at the same side of thecylinder body is connected with the buffer tank through a hydrogen outlet one-way valve, and the position sensor is connected with the solenoid valve through a signal wire. The invention has the advantages of electricity saving, good ability of utilizing the energy of high-pressure hydrogen to cause discharged tail hydrogen to flow back, simple structure, easy manufacture, low noise, no oil and corrosion, and high security and reliability.

The invention relates to an LED anti-explosion lamp which comprises a shell, wherein the LED anti-explosion lamp consists of a front light source cavity, a rear electric appliance cavity and a heat radiating cavity positioned between the front light source cavity and the rear electric appliance cavity, the light source cavity and the electric appliance cavity are closed cavities and are capable of preventing electric sparks from leaking, heat radiating through holes are arranged on the circumferential wall of the heat radiating cavity, the light source cavity is internally provided with an LED module, the electric appliance cavity is internally provided with a power supply driver adapted with the LED module, an electric wire connected with the power supply driver and the LED module is led to the light source cavity from the electric appliance cavity after passing through a sealing sleeve membrane; and a heat radiating sheet is connected to the LED module in the light source cavity, and the rear end of the heat radiating sheet is communicated with the heat radiating cavity. The invention has the advantages of good heat radiation effect, dust explosion prevention, high safety and long service life of the LED lamp.

The invention relates to an explosion-proof performance detecting device with a fire extinguishing function for battery production, and relates to the technical field of an explosion-proof performancedetecting device for battery production. The explosion-proof performance detecting device comprises a bottom plate and a first spring plate; the upper end of the bottom plate is provided with first springs; the first spring plate is disposed at upper ends of the first springs; and a first pressure sensor is embedded in the upper end of the first spring plate. The beneficial effects of the invention are that the first spring plate is connected to the bottom plate by using the first springs, when the pressure plate starts to exert pressure to a battery and a first tray apply, the first spring plate is elastically lowered by the first springs on the bottom plate after being pressed, so that the first pressure sensor can be buffered, and when the applied pressure and the first pressure sensorpair are utilized to detect the explosion-proof performance of the battery, the first pressure sensor can be simultaneously protected to prevent the applied pressure from being excessively large to cause the first pressure sensor to be crushed.

The invention discloses a passive vision navigation unmanned forklift system for an explosion-proof warehouse. The passive vision navigation unmanned forklift system comprises a forklift body, a dispatching device, an explosion-proof camera, an explosion-proof controller, an inductor, an alarm and a mechanical anti-collision device. The real-time position of a forklift is determined by processingand analyzing the real-time beacon information of the forklift and stored corresponding beacon information, and the optimal path selection is continuously carried out on a path until the target position is reached during the traveling. The passive vision navigation unmanned forklift system realizes unmanned operation of passive visual navigation in the explosion-proof warehouse, endangering of human health is avoided, the manpower investment is reduced, the operation efficiency is improved, and working time is shortened.