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 relates to the technical field of transformers, and discloses an emergency treatment device with dry-type transformer internal fire. The device comprises a transformer body and fixing boxes arranged on the left side and the right side of the transformer body, an air cavity is formed in each fixing box, a weak acid storage box and a sodium bicarbonate storage box are arranged at the inner bottom of each air cavity, and guide rails are arranged on the outer walls of inner cavities of the two fixing boxes. According to the invention, the organizational structure of a traction rope and an iron sheet is arranged at the upper part in the device; after a fire occurs in the device, storage boxes at the bottoms of two sides of the device can be broke so as to mix to generate acid-baseneutralization reaction to release a large amount of carbon dioxide; and through the arrangement of the variable cross-section of an air outlet spray head, a large amount of carbon dioxide gas is instantaneously injected into the inner cavity of the device in a high-pressure and high-flow-speed state, so that air around the ignition point is thinned, the effect of cooling the periphery of the ignition point is achieved, and the fire extinguishing efficiency is improved.

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 a micro powder storage device which comprises a tank body. The tank body comprises an outer wall and an inner wall, a gap with the preset width is formed between the outer wall and the inner wall to form a vacuum layer, the upper end of the tank body is provided with a feed pipe and a pressure relief assembly, and the lower end of the tank body is provided with a discharge pipe; the pressure relief assembly comprises a cover plate, a pressure relief pipeline and elastic parts, the pressure relief pipeline is communicated with the interior of the tank body, the cover plate is arranged on the pressure relief pipeline, and the cover plate is connected with the tank body through the elastic parts on the two sides of the pressure relief pipeline. According to the micro powder storage device, the two-layer vacuum tank body is arranged, the bearing capacity of the tank body is enhanced, and the explosion-proof property of the tank body is improved; meanwhile, the pressure relief assembly is arranged, high-pressure gas in the storage tank can be exhaust to the environment outside the tank body, an inner cavity of the tank body is subjected to pressure relief in time, the pressure in the tank body is reduced, the situation that an explosion is caused by the fact that the pressure in the tank body of the storage tank is too high is effectively prevented, and the safety property of micro powder storage is greatly improved.

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 which comprises a battery core component, a battery shell, electrolyte and a battery core cover, wherein the battery core component comprises a positive electrode, a negative electrode, an isolating membrane and other materials; the battery shell is provided with a bottom surface and a plurality of side surfaces which are vertical to the bottom surface and are extended upwards; the battery shell is provided with a containing space and a sealing port, wherein the containing space is formed by the bottom surface and a plurality of side surfaces in a surrounding manner; the battery core component is contained in the containing space; the electrolyte is filled between the battery core component and the battery shell; the battery core cover is used for sealing the battery core component and the electrolyte in the battery shell; the battery shell is provided with at least one safety valve; the at least one safety valve is arranged on one side surface of the battery shell and is close to an intersection part of the two adjacent side surfaces; and the distance between the safety valve and the sealing port or the distance between the safety valve and the bottom surface is less than one quarter of the distance between the sealing port and the bottom surface. Compared with the safety valve of the prior art, the safety valve of the lithium battery has the advantages of simple and convenient processing, low cost, high sensitivity, timely pressure-relief and the like, thereby the safety of the lithium battery is increased.

The invention provides an anti-pipe-blocking detection device, a spraying device, a pipeline material recycling method and a pipeline cleaning method. The anti-pipe-blocking detection device comprisesa valve body, an adjusting assembly and a proximity switch; the valve body is provided with a passage for connecting a to-be-detected pipeline and a branch communicating with the passage; the adjusting assembly is assembled in the branch, and the adjusting assembly comprises a piston matched with the branch, an elastic body acting on the piston and an end cover connected to the end of the branchin the mode of being capable of moving relative to the branch; and the proximity switch is assembled on the valve body and is arranged corresponding to the piston. The anti-pipe-blocking detection device is simple in structure, a related hydraulic system does not need to be additionally arranged, the pressure in the to-be-detected pipeline can be continuously adjusted, the pressure relief can be conducted on the pipeline in time when pipe blockage occurs, and pipe explosion accidents are avoided; according to the spraying device, residual materials in the pipeline can be collected back to a material barrel, and materials are saved; and the pipeline can be cleaned, the damage to devices due to material solidification is avoided, and therefore the service life is prolonged.

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 relates to the field of hydraulic oil cylinders, in particular to a temperature drop type anti-explosion early-warning hydraulic oil cylinder which comprises a liquid guide frame, supporting plate frames, a hydraulic oil cylinder body, a hydraulic driving component and the like, wherein one pair of supporting plate frames is fixedly connected to the top of the liquid guide frame, the hydraulic oil cylinder is fixedly connected between the two supporting plate frames, and the hydraulic driving component is arranged on the liquid guide frame. Through cooperation of a U-shaped backflow tube and devices on the U-shaped backflow tube, cooling liquid circulates in the U-shaped backflow tube, heat exchange is conducted between the cooling liquid and hydraulic oil in the hydraulic oil cylinder, and the cooling liquid can take away heat generated when the hydraulic oil cylinder operates, so that the hydraulic oil in the hydraulic oil cylinder can be cooled, cylinder explosion caused by too high temperature is prevented, and the purpose of effectively cooling is achieved.

The invention discloses a supercharger provided with a switching valve. The supercharger comprises a lubricating cavity and a driving shaft; the lubricating cavity is defined by a bearing plate and acover plate which are in sealing connection with each other; one end of the driving shaft extends to the outer side of the cover plate; a depressurizing hole is formed in the driving shaft; one end ofthe depressurizing hole communicates with the lubricating cavity and the other end communicates with the outside; the switching valve is installed in the depressurizing hole in an embedded mode; andthe switching valve comprises a valve body, a valve seat, a rolling ball and a cylindrical spring. The supercharger can timely release pressure in the lubricating cavity, maintain consistency betweenthe pressure in the lubricating cavity and the external pressure, and avoid leakage of oil gas mixture in the lubricating chamber into the inside of the mechanical supercharger. Furthermore, heat canbe taken while the pressure is released, so the service life and reliability of the mechanical supercharger are improved and system noises are lowered.

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 invention discloses a liquid pipeline dead oil segment pressure relieving device. The device comprises a liquid pipe, a tee joint, a blow-down pipe and a controller, wherein the liquid pipe is sequentially provided with a first valve and a second valve from the upstream to the downstream; a first connecting end of the tee joint is connected with the section, between the first valve and the second valve, of the liquid pipe, a second connecting end of the tee joint is connected with the input end of a pressure monitoring alarm device, and a third connecting end of the tee joint is connectedwith the input end of the third valve; the blow-down pipe is connected with the output end of the third valve through a pressure relieving pipe; and the controller is connected with the output end ofthe pressure monitoring alarm device. The liquid pipeline dead oil segment pressure relieving device has the beneficial effects that the pressure monitoring alarm of a liquid pipeline dead oil segmentis more timely in speed and higher in the accuracy rate, thus being capable of conducting pressure relieving on the liquid pipeline dead oil segment timely so as to improve the safety of the liquid pipeline and surrounding personnel and property.

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 discloses an electrochemical device and electric equipment with the electrochemical device. The electrochemical device includes an electrode assembly, a first case in which a receiving tank is formed, and a second case covering the receiving tank. The electrode assembly is accommodated in the accommodating groove. The second case includes a first surface facing the electrode assembly and a second surface opposite the first surface. The second shell is provided with a through hole penetrating through the first surface and the second surface. The second surface is provided with a first groove and a second groove. The first groove is communicated with the through hole. And the second groove is communicated with the first groove. By arranging the second groove, the bending strength of the second shell at the second groove is smaller than the bending strength of other positions of the second shell, and when the inside is inflated, the second shell at the junction of the first groove and the second groove is easy to deform, so that the connection of the liquid injection plug and the second shell at the junction of the first groove and the second groove is invalid; and therefore, the risks of expansion deformation and explosion are reduced.

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 isconvenient for equipping and locating battery unit, and prevents the battery unit from skipping in the shell.

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 relates to a special hydraulic station for testing the function of a hydraulic reversing valve and a testing method thereof, comprising: an oil source control branch, on which an oil tank and a pneumatic pump are arranged, and the output ends of the oil source control branch are respectively connected to downstream pressure control The input ends of the branch circuit and the safety control branch circuit; the output ends of the downstream pressure control branch circuit and the safety control branch circuit are respectively connected to the input ends of the hydraulic reversing valve test branch circuit and the total oil return branch circuit, and the output of the total oil return branch circuit The output end of the hydraulic reversing valve test branch is connected to the pilot valve and the main valve of the hydraulic reversing valve to be tested, and the pilot valve of the hydraulic reversing valve to be tested and the oil return port of the main valve are both After testing, the oil return branch is connected to the input end of the total oil return branch to form a circulation system; it also includes an air source control branch, the input end of the air source control branch is connected to the driving air source, and the output end is connected to the pneumatic pump. Used to ensure the normal operation of the air pump. The invention can be widely used in the field of underwater production control.

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 discloses an anti-expansion crack protecting device of a concrete wet spraying machine conveying pipe. The device is arranged between a wet spraying machine and a conveying pipe and comprises a connecting pipe and a hydraulic cylinder, wherein a flange is arranged at each of the two ends of the connecting pipe; a through hole is formed in the upside position of the pipe wall of the connecting pipe; a pipe opening of which the top is opened is formed along the wall surface of the through hole in an upwards extending way; the body of the hydraulic cylinder is welded to the pipe opening; the inner wall of the hydraulic cylinder body is on the extending line of the inner side wall of the pipe opening; an unloading hole is formed in one side of the hydraulic cylinder body; a flange surface is arranged at the top of the hydraulic cylinder body; a top cover is also arranged on the flange surface; a hydraulic oil filling hole is formed in the top cover and is communicated with an outside hydraulic station through a hydraulic oil pipe; the working direction of a piston rod of the hydraulic cylinder is downward; the rated pressure-withstanding value of the conveying pipe is greater than or equal to the pressure of hydraulic oil during work of the hydraulic cylinder. The device is of a purely mechanical structure, and is simple in structure, stable in running, safe, reliable, low in workload of maintenance, and low in cost.

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.

The invention discloses an electromagnetic pilot safety Y-shaped water attack pressure release valve directly driven by a gear motor, and relates to the technical field of water attack pressure release valves. Automatic pressure release can be rapidly achieved through the action of an electromagnetic valve, when a pilot valve breaks down, a main valve device can be manually opened, and it is guaranteed that the pressure release valve can still work normally. The Y-shaped water attack pressure release valve comprises a Y-shaped water attack pressure release valve main valve, an electromagnetic pilot operated valve and a controller. The main valve comprises a valve body, a special-shaped external thread valve rod and a valve cover, the middle of the special-shaped external thread valve rod is in threaded connection with the valve cover, a valve disc is arranged at the first end of a valve rod, extends into the valve body and is in sealing fit with the valve body, and the second end of the special-shaped rod is sequentially connected with the gear motor and a hand wheel; the main valve is communicated with the gear motor through the electromagnetic pilot operated valve; and a pressure sensor is arranged at an oil inlet of the main valve and can collect oil pressure at an inlet of the valve body. The pressure sensor and the electromagnetic pilot operated valve are electrically connected with the controller. The performance of the Y-shaped water attack pressure release valve is improved.

The invention discloses a liquid pipeline dead oil section pressure relief device and method. A liquid pipeline is sequentially provided with a first valve and a second valve from the upstream direction to the downstream direction; a pressure monitoring and warning device is arranged on the liquid pipe between the first valve and the second valve and connected with the liquid pipeline through a gauge valve; a three-way pipe is arranged between the gauge valve and the pressure monitoring and warning device, the gauge valve is connected with the first connecting end of the three-way pipe, and the pressure monitoring and warning device is connected with the second connecting end of the three-way pipe; the inlet end of the third valve is connected with the third connecting end of the three-way pipe, and the outlet end of the third valve is connected with a discharge pipe; and a controller is connected with the pressure monitoring and warning device. The invention further discloses a liquid pipeline dead oil section pressure relief method. The method includes the steps that a critical pressure value is set; the pressure monitoring and warning device is started; the pressure monitoring and warning device acquires the pressure of the liquid pipeline in real time and transmits the pressure to the controller; the controller analyzes the received pressure signals; and if the pressure value exceeds the critical pressure value, the pressure monitoring and warning device gives an alarm, and the controller controls a pressure guide pipe to relieve the pressure.