64results about How to "Relieve pressure in time" patented technology

The invention relates to the asymmetric stress distribution law of a large-dip-angle coal bed tight roof and stress field evolutionary characters after directional blasting pressure relief and provides a targeted large-dip-angle coal mining rock burst orientation prevention method. The method comprises the steps that 1. roof energy releasing is carried out, according to the stress distribution law of the tight roof, ahead roof deep hole blasting design is carried out, and the purposes that elastic energy in a zone is released, and roof weighting steps and intensity are reduced are achieved; 2. secondary energy consumption is carried out, according to the stress field evolutionary characters after roof orientation elastic energy releasing, elastic energy stored in coal bodies at middle-lower zones in a working face is consumed, and secondary disasters are avoided; and 3. secondary danger relieving is carried out, for a determined dangerous zone, roof deep hole blasting hole and coal body pressure relieving blasting are carried out in time, and a large amount of elastic energy in coal and rock masses is released. Finally, the scour-prevention effects of step-by-step pressure relieving and prevention first are achieved.

The invention relates to a cylindrical battery shell, comprising a cylinder, an upper cover plate and a lower cover plate, and is characterized in that the head of the cylinder is open and an open supporting table is arranged at the bottom of the cylinder, the lower cover plate is covered on the open mouth of the supporting table, and further more, the open mouth is a step-shaped mouth or a conical mouth, the invention further relates to a cylindrical battery made by the shell. Applying the technic proposal, the invention provides a cylindrical battery shell and a cylindrical battery which is convenient for equipping and locating battery unit, and prevents the battery unit from skipping in the shell.

The invention discloses a high-reliability lithium battery cap, which comprises an upper cover (1), a pore plate (4), a seal ring (2), an insulating spacer (3), a spring (5), an electric conductor (6) and an explosion-proof body (7), wherein the high-reliability lithium battery cap is characterized in that the explosion-proof body (7) is connected with the upper cover (1) through the spring (5); the electric conductor (6) is arranged on the upper cover (1) and the pore plate (4); the electric conductor (6) and the explosion-proof body (7) form a battery switch; and the pore plate (4) is connected with the insulating spacer (3). The high-reliability lithium battery cap has the advantages that the internal pressure of a battery can be accurately judged, the pressure can be timely released and exhausting can be repeated. Furthermore, the improved cap is provided with the switch and can be powered off and powered on, so that the utilization rate is high, scrapping of the battery caused by a fault can be well prevented and the cost is reduced.

A parallel pre-formation module composed of a low-cost high-space-utilization lithium ion battery is characterized in that a rolled cell is arranged in an aluminum shell by means of rolling, tabs are led out of the same side of the rolled cell, the top of the aluminum shell is provided with two openings, aluminum-plastic film is welded to the openings and is provided with holes which the tabs run through, the aluminum shell is fitted with a balloon, the side of the aluminum shell is provided with a side opening which is connected with a balloon connection hole, a diaphragm includes a microporous PET (polyethylene terephthalate) thin film and a layer of multi-pore material, straight micropores arranged along the thickness are distributed in the microporous PET thin film, the layer of multi-pore material is applied to the microporous PET thin film to form double-layer stacked meshed microporous structure, and the layer of multi-pore material has a porosity of 10-90% and is less than 2 micrometers in pore size. The microporous PET thin film is 2-50 micrometers in thickness, and cells are connected in parallel through a clamp and are subjected to parallel pre-formation.

The invention relates to the technical field of unmanned aerial vehicle equipment, and particularly discloses a hydrogen fuel cell unmanned aerial vehicle high-pressure gas cylinder valve. The hydrogen fuel cell unmanned aerial vehicle high-pressure gas cylinder valve comprises a valve body base (1); a first mounting cavity (2) communicating with the interior of the valve body base is arranged inthe side wall of the valve body base and is internally provided with a high-pressure stop valve (3); one end of the high-pressure stop valve is located outside the valve body base; the other end of the high-pressure stop valve is located inside the valve body base; the two ends of the valve body base are provided with a first connector (4) and a second mounting cavity (5) separately; the second mounting cavity and the first mounting cavity communicate with each other through a first channel (6) arranged in the valve body base; the first connector is connected with a high-pressure gas cylinder(7); and a reducing valve (8) is arranged inside the second mounting cavity and provided with a gas outlet connector (9). The hydrogen fuel cell unmanned aerial vehicle high-pressure gas cylinder valve has the characteristics of being small in size, good in stability, high in control efficiency and good in safety.

The invention relates to the technical field of chemical equipment, and discloses a chemical preparation explosion-proof reaction kettle which comprises a shell, a driving assembly, a feed device anda warning device. A fixing sleeve is fixedly mounted on the left side of the top surface of the shell, a feed pipe is fixedly nested inside the fixing sleeve, the top of the feed pipe extends out of the shell, a turning cover is movably mounted on the top of the feed pipe, the bottom of the feed pipe extends to an inner cavity of the shell, and a quantifying tank is fixedly mounted at the bottom of the feed pipe. The chemical preparation explosion-proof reaction kettle has the advantages that a communicating pipe is communicated with the shell, movable components can move leftwards under gas pressures, then a negative electrode block can be in electric contact with a positive electrode block, a series circuit can be formed between a lithium battery and a warning lamp, then warning can be emitted by the warning lamp, workers can be quickly reminded of opening a valve, the internal gas pressures of the shell can be relieved by a pressure relief tank, accordingly, the problem of failure of gas pressure meters required to be observed can be solved, and the pressure relief high efficiency of the chemical preparation explosion-proof reaction kettle can be greatly guaranteed.

The invention provides a vehicle-mounted fuel cell system and a start operation control method thereof, belongs to the technical field of fuel cells, and solves the problem that a coordination control method for a fuel cell and a DC-DC converter within a wide step-up ratio range in the process of switching from cold start to normal operation does not exist in the prior art. The system comprises a galvanic pile, a DC-DC converter, hydrogen equipment, air equipment and a controller. The hydrogen inlet of the electric pile is connected with the output end of the hydrogen equipment, the air inlet is connected with the output end of the air equipment, and the power supply end is connected with the DC-DC converter. And during low-temperature starting, the controller controls the DC-DC converter to be in a low switching frequency, the air equipment and the hydrogen equipment are started, and the stoichiometric ratio and the current of air entering the pile are adjusted, so that the pile outputs target voltage. And in the switching process, after the controller controls the output current of the electric pile to be reduced to a calibration value, the in-pile air stoichiometric ratio is adjusted to a target stoichiometric ratio. And during high-temperature operation, the controller controls the DC-DC converter to convert high switching frequency, and then the parameters of the fuel cell are adjusted in real time.

The invention provides a lithium battery module and a pressure relief device thereof. The lithium battery module comprises a battery cell, a shell and an upper cover plate, wherein the pressure relief device is mounted on the upper cover plate, the upper cover plate is welded to the shell by using laser, the pressure relief device is an explosion-proof piece positioned at the middle position of the upper cover plate, and the explosion-proof piece is in sealing connection with a pressure relief hole in the upper cover plate through a sealant; electrode columns are arranged in the upper cover plate on two sides of the explosion-proof piece, and insulating adhesive pieces are mounted between the electrode columns and the upper cover plate; a zigzag groove is formed in the position of the center line of the explosion-proof piece, the depth of the groove is 0.010 to 0.015 mm, the width of the groove is 0.005 to 0.008 mm, and the explosion-proof piece is made from an elastic material; the battery cell comprises a positive electrode electrically connected with the positive electrode column, a negative electrode electrically connected with the negative electrode column, an electrolyte and a diaphragm positioned between the positive electrode and the negative electrode; the diaphragm is made from a ceramic material, the negative electrode is a carbon nanotube, the positive electrode is lithium iron phosphate, and the electrolyte is polymer gel electrolyte or lithium hexafluorophosphate. The lithium battery module has the beneficial effects that the lithium battery module has the advantages that pressure relief is facilitated and the explosion-proof piece can be reusable.

The invention discloses voltage stabilizing aircraft skin clamping system and method. The voltage stabilizing aircraft skin clamping system comprises a hydraulic pump and a hydraulic cylinder, whereina voltage stabilizing unit and a pressure maintaining unit are arranged between the hydraulic pump and the hydraulic cylinder in parallel; the voltage stabilizing unit comprises a reducing valve A, an electro-hydraulic directional valve and a hydraulic control one-way valve sequentially connected with the hydraulic cylinder; the hydraulic control one-way valve is connected with an electromagneticdirectional valve A and an electromagnetic directional valve B; the electromagnetic directional valve A and the electromagnetic directional valve B are arranged in parallel; a rodless cavity of the hydraulic cylinder is connected with the electromagnetic directional valve A; a rod cavity of the hydraulic cylinder is connected with the electromagnetic directional valve B; the pressure maintainingunit comprises an electromagnetic directional valve C connected with the hydraulic pump; the electromagnetic directional valve C is connected with a reducing valve B, a one-way valve and an energy accumulator; and the reducing valve B and the one-way valve are arranged in parallel. When a skin is clamped through a jaw, the phenomenon that a clamping force is too big or too small cannot occur, thesystem is stable in reversing, the pressure of the jaw is maintained, the clamping force is unchanged, and a stretching effect cannot be influenced.

The invention discloses a method of pressure relief of a dead oil section of a liquid pipeline. The method comprises the steps that the step 1, the critical pressure value is set; the step 2, a pressure monitoring alarm device and a controller are started, and a first valve, a second valve, a third valve and a fourth valve can be located in a disconnection state; the step 3, the pressure monitoring alarm device acquires pressure signals in real time and transmits the pressure signals to the controller; the step 4, the controller analyses the received pressure signals, when the pressure value is larger than the critical pressure value, the step 5 is carried out, and if not, the step 3 is carried out; and the step 5, as the pressure monitoring alarm device gives an alarm, the controller controls the third valve and the fourth valve to be connected, and the pressure relief is conducted through a pressure guide pipe. The method has the beneficial effects that the pressure monitoring alarmof the dead oil section of the liquid pipeline can be more timely, the pressure monitoring alarm accuracy rate of the dead oil section of the liquid pipeline is higher, and therefore the timely pressure relief is timely conducted on the dead oil section of the liquid pipeline, and the security of the liquid pipeline and the peripheral personnel and property security are improved.

The invention relates to the field of biomass boilers, in particular to an explosion-proof multifunctional biomass energy boiler. The explosion-proof multifunctional biomass energy boiler comprises aboiler body, a base is arranged at the bottom end of the boiler body, a plurality of supporting mechanisms are arranged between the base and the boiler body, a containing groove is formed in the top wall in the boiler body, an extrusion mechanism is arranged in the containing groove, a box body is fixedly connected to the top end of the boiler body, the upper end of the extrusion mechanism extendsinto the box body, a guide mechanism is arranged between the top end of the extrusion mechanism and the inner wall of the box body, push blocks are connected to the two sides of the extrusion mechanism through fixing plates, two fixing rods are vertically fixed to the two sides of the interior of the box body, the two push blocks are movably connected with the two corresponding fixing rods in a sleeving mode, alarm mechanisms are arranged at the upper ends of the two push blocks, and the upper ends of the two alarm mechanisms extend out of the box body. When the internal pressure of the boiler body is too large, the alarm devices can timely remind a worker to close the equipment, and meanwhile, the pressure in the boiler body can be synchronously released to prevent an explosion phenomenon, so that the service life of the boiler body is prolonged, and the use performance of the boiler body is improved.

The invention discloses a pediatric ICU monitoring and nursing efficient disinfection device which comprises a cover plate, a disinfection bin, an ultraviolet sterilization lamp, a floating seat, a grating plate and a gas storage cavity; a pipe joint communicated with the interior of the disinfection bin is arranged on the outer wall of the disinfection bin, and a plurality of air holes penetrating through the gas storage cavity are formed in the top of the disinfection bin; the floating seat is driven by a lifting air cylinder vertically installed at the bottom of the disinfection bin to move vertically; a pressure relief assembly used for conducting pressure relief on steam in the disinfection bin is further arranged on the cover plate. The nursing materials such as towels can be subjected to ultraviolet disinfection through the ultraviolet sterilization lamp, hot steam is conveyed into the air storage cavity through the pipe connector by external steam generation equipment and is emitted out through the air holes, and the nursing materials, such as towels, on the grating plate are subjected to steam disinfection; thus, the disinfection treatment is conducted in a composite mode, so that the disinfection efficiency is improved, and the lifting air cylinder is arranged to drive the floating base to move up and down so that nursing materials such as towels placed on the grating plate can be taken conveniently.

The present invention provides a corrosion-resisting all-metal pressure transmitter. The corrosion-resisting all-metal pressure transmitter comprises housing, a probe and a cable joint. The cable joint is installed from the upper portion of the housing, the cable joint is fixedly fastened to the inner wall of the housing through nuts, and the probe is connected with the housing; a plastic part is arranged in the housing, and the housing is provided with a circuit structure for controlling the working of the pressure transmitter; an internal screw thread blind hole 1 is arranged at the center position of the end portion of the probe, and the internal screw thread blind hole 1 is provided with a clamping ring; and steps are arranged at the bottom of the blind hole 1, an internal screw thread blind hole 2 is downward arranged at the center of the steps, and the internal screw thread blind hole 2 is provided with damping screws. Through adoption of an air vent and a damping screw structure, the corrosion-resisting all-metal pressure transmitter is able to unload pressure timely and improve the reliability of products when instant pressure is large; and moreover, the corrosion-resisting all-metal pressure transmitter matches an input keyboard to freely set different alarm points and output time-relay time according to the requirement of fields.

The invention relates to the field of water source heat pump utilization engineering, in particular to a multifunctional protective valve capable of exhausting and overflowing. The valve capable of exhausting and overflowing is composed of a base, a valve casing, a valve core and a floating ball, and is characterized in that the valve casing is assembled on the base, the valve core is assembled inthe valve casing, the floating ball is assembled in a floating ball bell of the valve core. A pipeline thread or a connecting flange is arranged on the lower surface the base, a valve casing fixing seat is arranged on the upper surface of the base, and a through hole is formed in the middle of the base. An overflowing port is reserved in one side of a screw rod guiding hole in the upper part of the valve casing, a guide wing is reserved in the inner side of the screw rod guiding hole, and a lower port can be tightly combined with the valve casing fixing base on the base. The valve can be matched with an evaporator flange at a wellhead of a water return well, multiple functions of exhausting, overflowing and pressure relief are achieved, the heat exchange efficiency of an evaporator is improved, and meanwhile, pressure can be relieved in time to protect the safety of a system.

The invention relates to the technical field of geothermal resource exploration, and discloses a drilling and blowout prevention sampling device for pneumatic down-hole hammer of geothermal wells. Thedrilling and blowout prevention sampling device for the pneumatic down-hole hammer of the geothermal wells comprises a blowout prevention sampling device outer shell partially sleeved on the periphery of an end part exposed on the ground of a drill rod, wherein a buffer cavity, a diversion cavity, a pressure relief shunt cavity and a sample collection and release cavity are sequentially formed inside the blowout prevention sampling device from left to right; the inlet end of the diversion cavity is communicated with the outlet end of the buffer cavity, the inlet end of the pressure relief shunt cavity is communicated with the outlet end of the diversion cavity, and the inlet end of the sample collection and release cavity is communicated with the outlet end of the pressure relief shunt cavity; a drain opening is formed in the bottom wall of the pressure relief shunt cavity, an air outlet is formed in the top wall of the sample collection and release cavity, and a sample collection opening is formed in the bottom wall of the sample collection and release cavity. The drilling and blowout prevention sampling device for the pneumatic down-hole hammer of the geothermal wells has the advantages of reducing the auxiliary time caused by blowout prevention and increasing the effective sampling rate of rock debris samples.

The invention discloses a muck discharging gate system of a spiral conveyor of an earth pressure balance shield machine. The muck discharging gate system comprises a first gate, a second gate, a muck discharging guide pipe, a third gate and a muck sliding funnel which are sequentially installed at a muck outlet of the spiral conveyor, each gate comprises a gate plate supporting frame, a gate plate, a pair of oil cylinder supports and two hydraulic oil cylinders, the gate plate supporting frame comprises a supporting frame body, a nylon guide groove and a sealing assembly, the gate plate comprises a gate plate body and a gate plate top, the pair of oil cylinder supports are fixed in the middles of the outer side faces of the two sides of the supporting frame body, the two hydraulic oil cylinders are installed on the pair of oil cylinder supports correspondingly, piston rods of the two hydraulic oil cylinders are connected to the two sides of the top of the gate plate through connecting mechanisms correspondingly, the included angle between the inlet end and the outlet end of the muck discharging guide pipe is 120-160 degrees, and the included angle between the inlet end and the outlet end of the muck slipping funnel is 100-130 degrees. According to the muck discharging gate system, the flowing speed of muck can be effectively reduced, and the gushing phenomenon of the shield tunneling machine in the tunneling process is avoided.

The invention relates to the technical field of cosmetic anti-oxidation storage equipment, and particularly relates to a cosmetic anti-oxidation tank with high lipid content. The cosmetic anti-oxidation tank comprises a storage tank, wherein an inner cavity of the storage tank is set as a storage inner cavity; a pressure relief opening is formed in the middle of the upper end surface of the storage tank; an exhaust opening is formed in the right side of the storage tank; a discharge opening is formed in the middle of the lower end surface of the storage tank; and an air inlet is formed in theleft side of the lower end surface of the storage tank. The cosmetic anti-oxidation tank has the beneficial effects that a three-way pipe is arranged, so that nitrogen discharged by feeding circularlyflows into a feeding tank, the pressure of the inner cavity of the feeding tank is increased, the feeding rate is increased, meanwhile, the feeding tank is filled with nitrogen for protection, and the feeding process is prevented from being polluted by air; a sleeve with a vertical lifting function is matched with a lifting plate, so that the lifting plate is driven to move up and down through increase of pressure intensity in the feeding and pressurizing process, and timely pressure relief is realized; and meanwhile, when the pressure is reduced, the lifting plate is timely closed through spring reset, and pollution caused by air circulation is avoided.