37 results about "Pressure triggering" patented technology

The invention relates to the technical field of electromagnetic valves, in particular to a two-position three-way electromagnetic valve which comprises a valve seat, a sleeve seat, a movable iron core assembly, a conical spring and a secondary pressing mechanism, the movable iron core assembly comprises a movable iron core, an upper sealing head and a lower sealing head, and the secondary pressing mechanism comprises a pressure triggering structure, a reverse pushing structure and a downward pressing structure; the pressure triggering structure comprises an upper pushing plate, a lower pushing plate and a triggering assembly, the upper pushing plate and the lower pushing plate are connected with the reverse pushing structure and the downward pressing structure respectively, and the triggering assembly pushes the upper pushing plate and the lower pushing plate to move through fluid pressure changes; the reverse pushing structure comprises two ejector rods, and the ejector rods are connected with the upper pushing plate; the pressing structure downwards penetrates through the movable iron core and is connected with the lower sealing head; the secondary pressing mechanism is arranged, and after the secondary pressing mechanism is triggered, secondary pressurized sealing of the lower sealing head is achieved.

The utility model discloses a water spray gun convenient to adjust water flow, which comprises a gun body and a rear pressing trigger arranged on the rear side of the gun body, a water outlet cavity is formed in the gun body, and a valve rod capable of adjusting the flow of the water outlet cavity is arranged in the rear pressing trigger; the rear pressing trigger is hinged to the rear side of the gun body, and the valve rod can be pulled to control the flow of water flow in the water outlet cavity by pressing and rotating the rear pressing trigger; an adjusting piece is arranged on the rear pressing trigger, and a buckling piece used for abutting against the adjusting piece to lock the rear pressing trigger is arranged on the rear side of the gun body; a plurality of steps are formed on the front side of the adjusting piece from top to bottom, bosses are formed on the rear side of the buckling piece, and when the rear pressing trigger rotates at different positions, the bosses can abut against and be fixed in the corresponding steps so as to lock the rear pressing trigger. And multi-stage accurate flow control is realized. The design of the adjusting steps of different levels allows a user to select the most appropriate water yield according to specific requirements, and the flexibility and accuracy of operation are ensured.

The utility model relates to the technical field of truck green channel fast detection systems, and provides a truck head avoiding device of a truck green channel fast detection system, which comprises an inspection channel provided with an inspection system for inspecting vehicles and a truck head avoiding component for controlling whether the inspection system is started or not. The vehicle head avoiding assembly is provided with a plurality of transmitting points and a plurality of receiving points, the transmitting points and the receiving points are arranged in a one-to-one correspondence and flush mode, and the inspection channel is provided with a cleaning mechanism used for cleaning the vehicle head avoiding assembly. The cleaning mechanism comprises a pressure trigger plate used for allowing a vehicle to pass through, a plurality of linkage lifting strips, a plurality of cleaning brush strips used for wiping all the transmitting points or all the receiving points and a plurality of reset pieces, all the cleaning brush strips are fixedly connected to all the linkage lifting strips in a one-to-one correspondence mode, the cleaning brush strips and the transmitting points are arranged at intervals, and all the linkage lifting strips are in linkage with the pressure trigger plate. According to the technical scheme, the problem that the starting accuracy of the X-ray inspection device is affected due to dust accumulation on the headstock avoiding assembly in the prior art is solved.

The utility model relates to an internal arteriovenous fistula grip strength exerciser structure which comprises a base, a fixed handle and a movable handle. The fixed handle and the movable handle are arranged side by side. The fixed handle is fixedly connected with the base, an extension arm is transversely arranged at the end, close to the base, of the movable handle, the movable handle is hinged to the base through the extension arm, and the rotation direction of the extension arm is coplanar with the fixed handle. An adjusting screw rod is arranged on the extension arm in parallel, a screw rod sleeve is arranged on the adjusting screw rod, a mounting frame is arranged on one side, deviating from the fixed handle, of the base, and the mounting frame is connected with the screw rod sleeve through a spring; a pressure indicating lamp and a pressure triggering assembly for triggering the pressure indicating lamp when being pressed are arranged on the base; according to the utility model, the whole structure is simple, the adjustment is convenient, more refined grip strength adjustment can be realized through the adjusting screw rod, whether the grip strength reaches the standard or not can be prompted to a patient through the cooperation of the pressure triggering assembly and the pressure indicating lamp, and the functions are rich.

The utility model relates to a power generation floor, in particular to a pressure trigger type power generation floor which comprises a box body, a cover plate, a water pressing device, a miniature hydroelectric generator, a one-way water outlet valve and a three-way pipe, the cover plate is arranged on the box body in a sliding mode, a through hole is formed in one side of the box body, and the water pressing device and the miniature hydroelectric generator are installed at the bottom in the box body. A one-way water outlet valve is connected between the input end of the micro hydroelectric generator and the water pressing device, and the output end of the micro hydroelectric generator is connected and communicated with a three-way pipe. When a pedestrian steps on the cover plate, the feet of the pedestrian tread on the cover plate, liquid circulates in the water pressing device, the one-way water outlet valve, the three-way pipe, the water storage ball, the one-way water inlet valve and the miniature hydroelectric generator, a turbine of the miniature hydroelectric generator rotates to generate electricity to generate electric energy, and under the action of the guide rod, the supporting plate and the elastic piece, when the water pressing device loses elasticity, the cover plate can be kept flush, so that the water pressing device is protected. Pedestrians are prevented from treading on the cover plates and being stumbled due to non-uniform height of the cover plates, so that potential safety hazards are reduced.

The invention relates to the technical field of gas meters, in particular to a gas meter fault alarm device which is characterized in that a mechanical alarm structure comprises a hollow box fixed to the front face of a first gas collection box, a left gas chamber, a right gas chamber and a cavity, the left gas chamber and the right gas chamber integrally communicate with each other in the hollow box, and a first magnet is slidably connected between the left gas chamber and the right gas chamber; a micro-force spring is fixed to the right gas chamber, one end of the micro-force spring is fixedly connected with the first magnet, overlapped gas ports are formed between the first gas collection box and the left gas chamber in a penetrating mode, the gas pressure change caused by gas leakage is directly responded through a pressure triggering mechanism, and dependence on sensitive elements such as an electronic sensor is not needed. The electronic equipment is fundamentally prevented from being exposed in kitchens, basements and other environments for a long time, and detection sensitivity reduction and missing detection caused by coverage or attachment of pollutants such as oil smoke, dust and water vapor are avoided.

The utility model relates to the technical field of alarms, in particular to an automatic pressure alarm for a pressure container, which comprises a pressure-bearing pipe joint mounted at the top of a corresponding pipe orifice of the pressure container, a pressure-bearing pipe cavity in the pressure-bearing pipe joint is communicated with the inside of the pressure container, a pressure-bearing shifting mechanism is mounted in the pressure-bearing pipe cavity, and a pressure-bearing shifting mechanism is mounted in the pressure-bearing shifting mechanism. An upper plugging flange end cover is mounted in the pressure-bearing pipe cavity at the top of the pressure-bearing displacement mechanism, a controller and an audible and visual alarm are mounted on the two sides of the top of the upper plugging flange end cover respectively, and pressure triggers are mounted in mounting holes in the two sides of the upper plugging flange end cover respectively. According to the pressure alarm, the mode that the two pressure triggers are symmetrically installed in a matched mode is adopted, when any one pressure trigger is triggered, triggering of the audible and visual alarm can be achieved, audible and visual alarming is achieved, the reliability of triggering of the whole pressure alarm is effectively improved, and potential safety hazards caused by failure of a single trigger are avoided.

The air control breathing machine comprises a main machine and a breathing mask, the main machine is communicated with an air source port and a communication port, the communication port is divided into a suction port, an expiration port, an inspiration port, an atomization port and an exhaust port, the suction port is communicated with a liquid collection bottle, the expiration port is communicated with the breathing mask, and a humidification tank is communicated between the inspiration port and the breathing mask. An atomizing cup is communicated between the atomizing opening and the breathing mask; compressed air or medical oxygen is used as power, a pneumatic control mechanism is used for working, a power source is not needed, and the device can be used under the power-source-free conditions such as emergency treatment, transfer and field. The breathing machine has the functions of intermittent mechanical ventilation IPPV of the breathing machine, synchronous intermittent instruction ventilation SIMV, positive airway pressure ventilation CPAP, positive end expiratory pressure PEEP, airway inspiration negative pressure triggering, airway expiration positive pressure protection, airway atomization humidification, suction, air and oxygen mixing and manual ventilation, can be used in normal pressure departments, can reach 0.3 MPa in a hyperbaric oxygen chamber, can reach 0.3 MPa in a hyperbaric oxygen chamber, can reach 0.3 MPa in a hyperbaric oxygen chamber, can reach 0.3 MPa in a hyperbaric oxygen chamber, can reach 0.3 MPa in a hyperbaric oxygen chamber, can reach 0.3 MPa in a hyperbaric oxygen chamber, can reach 0.3 MPa in a hyperbaric oxygen chamber, can reach 0.3 MPa in a hyperbaric oxygen chamber, can reach 0.3 MPa and long-time stable and reliable use can be realized.

The cooling package comprises a bottle cap, a bottle body and an air inlet valve, the bottle body comprises an inner bottle, an outer bottle and a bottom cap, the bottle cap is installed at an opening in the upper end of the inner bottle, the inner bottle is fixedly installed on the outer bottle, at least part of the inner bottle is located in the outer bottle, a cavity for storing media is formed between the inner bottle and the outer bottle, and the air inlet valve is arranged in the cavity. The bottom cover is fixedly installed on the outer bottle, an air channel is formed between the bottom cover and the outer bottle, the inner bottle comprises an installation base, the installation base is provided with at least one air inlet valve, the bottle cover comprises at least one abutting groove, the abutting groove is located in the end face, facing the air inlet valve, of the bottle cover, the abutting groove extends in the circumferential direction, the abutting groove abuts against the air inlet valve, and the abutting groove comprises a first part and a second part. When the first part abuts against the gas inlet valve, the gas inlet valve blocks the cavity and the gas channel, when the second part abuts against the gas inlet valve, the gas inlet valve communicates with the cavity and the gas channel, a medium in the cavity forms refrigeration gas flowing to the gas channel, and according to the packaging bottle, the gas inlet valve can be opened by rotating the bottle cap to release the refrigeration gas to cool the bottle body.

The invention relates to the technical field of medical expiration detection equipment, in particular to a pressure zero point calibration and blowing judgment anti-interference method of an expiration detection device. The method comprises the following steps: under a non-blowing condition, sampling a pressure sensor for multiple times, calculating a mean value, and storing the mean value as a zero offset; when blowing judgment is carried out, gauge pressure or differential pressure is obtained by subtracting the zero offset from the reading of the pressure sensor, and first-order low-pass filtering is carried out on the gauge pressure or the differential pressure; when the filtered pressure exceeds a set threshold value, it is judged that blowing triggering is conducted; when the reading of the pressure sensor exceeds the reasonable interval, the filtering state is not updated, and the historical filtering value or the reference value is output, so that false triggering is avoided. By the adoption of the method, the influence of baseline deviation caused by assembly drift, temperature drift and gas path micro leakage on blowing judgment can be reduced, the false triggering risk caused by instantaneous noise or communication abnormity is reduced, and the method is suitable for various expiration sampling and detecting devices based on pressure triggering.

The utility model relates to a functional sound smoke prevention infantry landmine training device triggered by pressure, which comprises a box body and a box cover, a first flue is fixed at the lower part of the box cover, and a second flue is arranged in the box body; a fuming device is arranged in the second flue; at least one group of elastic supporting devices are arranged in the box body; a conductive device is arranged between the elastic supporting device and the box cover; a power supply and a sounding device are fixed at the bottom of the box body; and the power supply, the sounding device, the smoke generating device and the conductive device are electrically connected. According to the utility model, the sounding device and the smoke generating device are arranged in the box body, and harsh explosive sound and strong red (blue) smoke can be generated after triggering, so that the diversity and functionality of the teaching aid are effectively enriched from the visual and auditory aspects, and the problem of low training effect caused by poor explosion effect in the training process is solved.

This invention discloses a linked fire sprinkler head and its linked fire protection system, belonging to the field of fire protection technology. This product uses a pressure triggering device to contact the fire bead. When a sprinkler head in the linked pipeline connected to the main body is triggered by high temperature, the water pressure inside the linked pipeline will decrease momentarily. At this time, the pressure triggering device will push the fire bead to move towards the guide stop. When the fire bead contacts the guide stop, the inclined surface on the guide stop will cause the fire bead to tilt towards the inclined surface. After the fire bead tilts, the lateral force on the fire bead will increase, resulting in an irreversible rapid tilt and ejection from the main body. After the fire bead is ejected, the top plug loses its support. At this time, the fire water in the linked pipeline will push open the top plug to achieve spraying.

The application relates to a double-channel pressure trigger type slurry valve sealing device and a sealing method thereof, and relates to the technical field of slurry valves. The sealing device comprises a valve body, a control member, an executing mechanism and a sealing structure. The sealing structure comprises a main sealing member and an auxiliary sealing member, both of which are pressed against the valve body to seal. An extrusion assembly is used for extruding the auxiliary sealing member. When slurry in the valve body leaks through the main sealing member, the extrusion assembly is driven to extrude the auxiliary sealing member. The main sealing member and the auxiliary sealing member are used to seal in cooperation. When the slurry in the valve body leaks through the main sealing member, the extrusion assembly is driven to extrude the auxiliary sealing member, so that the deformed auxiliary sealing member can better realize sealing and block the slurry from leaking outward. Meanwhile, when the pressure in the valve body is reduced, the pressure on the slurry is reduced, the auxiliary sealing member is elastically pushed to move back the extrusion assembly, and the slurry is also pushed to move back through the main sealing member into the valve body, so that the performance stability of the slurry valve is improved.

The utility model relates to the technical field of construction anti-intrusion devices, in particular to an operation construction anti-intrusion device which comprises a protective fence body, connecting bases are fixedly connected to the two sides of the protective fence body, stand column assemblies are fixedly connected to the connecting bases through bolts, and pressure triggering assemblies are fixedly connected to the middles of the inner sides of the stand column assemblies. The top of the stand column assembly is in threaded connection with a connecting screw rod, and the connecting screw rod extends into the stand column assembly. Each stand column assembly comprises two cavity stand columns, the two cavity stand columns are fixed through bolts, sound outlet holes and movable grooves are formed in the tops of the cavity stand columns, and the sound outlet holes are located below the movable grooves. According to the device, the alarm system is arranged in the protective fence structure, so that the physical damage risk is effectively reduced, and reliable safety protection is provided for a construction area.

The utility model discloses a kind of fixing device suitable for water environment, including shell, the exciting type nail shooting assembly of being set in the shell, power supply, and with the main control circuit of this power supply electric connection, nail shooting drive control circuit and nail shooting trigger gate circuit, the exciting type nail shooting assembly includes nail and electrode plug, nail shooting trigger gate circuit is used to send exciting signal to main control circuit, the nail shooting drive control circuit is used to output current to electrode plug, exciting nail shoots out;The nail shooting trigger gate circuit includes contact switch, the shell has pressure trigger mechanism for controlling the opening and closing of the contact switch.Using the above scheme, through multiple insurance structure, rebound type trigger structure, eliminate water pressure influence, especially suitable for water environment use, while greatly improve the reliability and safety of device, overall structure is compact, easy to operate, and operation steps are less, difficulty is low, fault tolerance is very good, be favorable to improve work efficiency.

The utility model relates to the technical field of pressure trigger emergency cut-off, particularly relate to a pressure trigger emergency cut-off device, its through setting connecting mechanism and barrier mechanism, thereby can cut off the flow when taking out the equipment in the pressure trigger emergency cut-off process, prevent material leakage, including the flow mechanism, still including control mechanism, locking mechanism, two groups of connecting mechanism and two groups of barrier mechanism, control mechanism installs on the flow mechanism, locking mechanism installs in the flow mechanism, two groups of connecting mechanism install on the flow mechanism, and a group of barrier mechanism is installed on every connecting mechanism, the flow mechanism carries out the flow, control mechanism controls, locking mechanism cuts off, connecting mechanism connects, and barrier mechanism blocks.

This invention relates to a pressure adaptive sealing control method and apparatus. The apparatus includes: a sealing seat with a static sealing surface and a first conductive channel; a state transition member rotatably disposed within the sealing seat and having a second conductive channel; an elastic drive member disposed within the sealing seat, comprising a pressure-bearing elastic energy storage member and a sliding trigger member mechanically locked thereto; and a pressure trigger valve disposed on an external pressure drainage channel. When the ambient pressure reaches a set threshold, the pressure trigger valve opens, drawing high-pressure medium to push the sliding trigger member to release the restriction on the elastic energy storage member; the elastic energy storage member rapidly releases energy and pulls the state transition member to rotate, causing the first and second conductive channels to be offset relative to each other, thereby closing the airflow channel.

The invention discloses an active adjustable double-level pressure trigger control method based on negative pressure ventilation, which comprises the following steps: system initialization and parameter setting interface preparation: an operator checks power supply connection and voltage conditions of a negative pressure respirator, and starts a respirator system for self-inspection; entering a function key interface through the operation panel; low-level pressure trigger function selection and parameter setting: after the low-level pressure trigger function is started, an operator sets a low-level pressure trigger value, trigger duration and low-level trigger support pressure according to the clinical treatment purpose and the physical condition of the patient. Through the setting of positive and negative dual-level pressure triggering, a more comprehensive pressure triggering solution is provided for the thoracic nail type negative pressure breathing machine, and no matter what breathing state a patient is in or what breathing requirement the patient faces, the setting can effectively meet various possible pressure triggering conditions; and the breathing machine can better adapt to illness states and breathing characteristics of different patients.

This invention relates to the field of fluid transport equipment technology, specifically to a high-sealing-performance vortex circulating pump, comprising a pump body and a motor, with a sealing housing connecting the pump body and the motor. The sealing housing contains a first sealing cavity and a second sealing cavity. A main sealing unit is housed in the first sealing cavity, and a backup secondary sealing unit is housed in the second sealing cavity. During the entire standby cycle of normal operation of the main seal, there is no contact between the stationary and moving rings of the secondary seal, preventing wear of the secondary seal in standby mode. However, when severe leakage occurs in the main seal, the increased pressure in the first sealing cavity automatically pushes the pressure trigger sleeve to move, causing the floating secondary seal moving ring to tightly adhere to the stationary secondary seal, forming a seal. The working state is automatically locked by an elastic limiting element, thus forming a second line of defense, avoiding the risk of direct leakage of the medium when the main seal fails.

The invention relates to the technical field of simulated pregnant woman teaching, and discloses a portable multifunctional simulated pregnant woman teaching model based on sensor fusion, the model comprises five core modules, a pressure trigger module collects pressing signals in real time through pressure sensors on the outer sides of the middle sections of arms and thighs; the fetal heart simulation module collects fetal heart signals through a sensor which is wrapped by soft sponge and exposed out of a pickup surface, and fetal heart sound switching is controlled to be linked with a fetal heart-free prompting lamp. The control module is electrically connected with the two, burns and runs corresponding programs, and fuses the signals through a built-in algorithm to generate a cooperative instruction; the action driving module drives limbs to move through micro steering engines in joint grooves; the power module is fixed to the bottom of the trunk and stably supplies power to all the modules. By means of the sensor fusion technology, pressure triggering of limb movement and fetal heart sound playing are achieved, fetal heart-free states are accurately switched, installation is convenient, signals are stable, and the false alarm rate is low.

The application relates to a snake driving device, belonging to the technical field of power transmission facilities, in particular to a snake driving device for a power transmission steel pipe pole and a use method thereof. The snake driving device comprises a steel pipe climbing frame and a sleeve. The steel pipe climbing frame is fixedly installed on an external power transmission tower. The sleeve is sleeved on the steel pipe climbing frame. A rotating sleeve is movably sleeved on the outer side wall of the sleeve. A plurality of cone spikes are arranged on the outer side wall of the rotating sleeve. An active sleeve is arranged below the sleeve. The active sleeve is movably sleeved on the steel pipe climbing frame. A driving mechanism and a trigger mechanism are arranged in the steel pipe climbing frame. The driving mechanism comprises a transmission gear ring, a driving motor, a rotating shaft and a transmission gear. The transmission gear ring is inlaidly installed above the inner wall of the rotating sleeve. The trigger mechanism comprises a mounting groove, a pressing plate, a pull rod and a pressure trigger. The application avoids the situation that a snake climbs onto a power transmission tower, and solves the problem that a snake climbing onto a power transmission tower easily causes dangerous situations.

The application discloses a centralized water supply ultrafiltration water purification water quality monitoring equipment based on wireless network control, which comprises a placing shell, a monitoring mechanism and a control module. The air bag is inflated upward under the inflation of the air pipe to push the upper connecting rod, so that the distance between the connecting disc and the contact block is shortened. At this time, the elastic outer rod is extruded, the extrusion pressure triggers the reset column, and the upper and lower ends of the reset column are connected between the connecting disc and the contact block. The pressure trigger reset column is extruded to extend the two ends, so that the outer end of the pressure trigger reset column contacts the trigger button. The trigger button transmits the pressing depth to the processing terminal. The received signal is transmitted to the infinite transmission module through the receiving module, transmitted to the cloud receiving mechanism through the infinite transmission module using 5G, and the water quality is monitored by the staff through real-time data.

The utility model relates to the technical field of in-situ thermal injection wells, and particularly discloses an in-situ thermal injection well which comprises an injection tubular column, and a shallow layer final pressure regulating module, a middle layer pressure triggering module and a deep layer priority starting module are sequentially fixed in the injection tubular column from top to bottom in the axial direction. A second-level spring is arranged in the shallow final pressure regulating module, a first-level spring is arranged in the middle pressure triggering module, the second-level spring is fixedly connected with one end of a second-level pressure sliding sleeve of the shallow final pressure regulating module, and the first-level spring is fixedly connected with one end of a first-level pressure sliding sleeve of the middle pressure triggering module. When the device is used, ordered injection of a deep layer, a middle layer and a shallow layer is constructed through the rigidity difference of the first-stage spring and the second-stage spring, the problem of insufficient repair of the deep layer and the middle layer of traditional equipment is solved, the middle layer module and the shallow layer module are accurately guided through the guide rail sliding block, it is ensured that the sliding sleeve is stably started according to the preset pressure, and finally the repair accuracy is improved.

This invention discloses an integrated fire-fighting device and method for thermal runaway, comprising an integrated fire-fighting body and a fire-fighting unit. The integrated fire-fighting body has a through hole and an aerosol generating chamber inside. The aerosol generating chamber contains a thermally sensitive wire, a fixed bracket, a connecting joint, a temperature-sensing element, a sealing cover, and aerosol. In this invention, the sealing cover is pressed tightly against the connecting joint by the temperature-sensing element, which can seal the fire-fighting medium in the fire-fighting medium channel. When the temperature-sensing wire reaches a set threshold, physical deformation occurs, triggering the release of aerosol, causing the aerosol to initially immerse the space where the integrated fire-fighting body is located. Then, the temperature-sensing element is driven to melt or rupture, connecting the fire-fighting medium channel with the aerosol generating chamber to release the fire-fighting medium for cooling. After the gas cooling agent is released, the pressure trigger valve detects the preset pressure and opens the spray nozzle to immerse the space again, achieving effective fire extinguishing, cooling, and decontamination even when not affected by strong magnetic fields.

The invention relates to the technical field of atomization devices, in particular to a portable oxygenation atomization treatment device which comprises a device body, a trigger mechanism, an atomization unit and a breathing mask connector. The bottom of the device body is provided with a connector for connecting a portable oxygen bottle; the trigger mechanism can be of a manual pressing type or a breathing negative pressure trigger type and is used for controlling opening and closing of an oxygen bottle valve; the atomization unit is a jet atomization assembly or a vibration screen mesh assembly, a jet atomization mode or a vibration screen mesh atomization mode is adopted, jet atomization does not need a power source, vibration screen mesh atomization is low in power consumption, and the device is particularly suitable for the field operation, frontier defense, rescue and other environments without stable power supply. According to the device, the problem of energy restriction of equipment in field tasks is fundamentally solved, and the reliability, the self-holding force and the field adaptive capacity of individual medical equipment are remarkably improved.

The application relates to a nuclear power technology field, in particular to a containment vessel heat removal system which comprises a containment vessel, a pressure trigger assembly and an airbag assembly. The containment vessel has a safety cavity, a through hole communicating with the safety cavity is arranged on the containment vessel, and a pressure wall closing the through hole is arranged on the containment vessel. The pressure trigger assembly comprises a pressure cylinder, a movable rod and a wall breaking piece. The pressure cylinder is arranged on the outer circumferential surface of the containment vessel, and the pressure cylinder has a pressure cavity. The movable rod is arranged on the pressure cylinder, and the movable rod has a normal pressure state and a high pressure state. In the high pressure state, the movable rod is movable relative to the pressure cylinder under the pressure action in the safety cavity. The wall breaking piece is arranged on the movable rod. The airbag assembly comprises an airbag which is arranged on the outer circumferential surface of the containment vessel and communicates with the through hole. The containment vessel heat removal system can relieve the pressure in the safety cavity, reduce the temperature in the safety cavity, and prevent secondary accidents of the containment vessel and nuclear facilities in the containment vessel.

A deep soil leachate collection device includes a trigger chamber, a detachable storage chamber at the lower end of the trigger chamber, and a collection chamber at the lower end of the storage chamber. Several filter holes are formed at the lower end of the collection chamber. A filter plate is fixedly installed on the inner circumference of the lower end of the storage chamber. A coaxial piston is positioned above the filter plate, with its outer circumference in airtight sliding contact with the inner circumference of the storage chamber. A coaxial piston rod is fixedly installed on the piston, and the piston rod is slidably mounted on the storage chamber via a sliding sleeve. The outer circumference of the piston rod is connected to the storage chamber via a first spring. A corrosion pin is abutted against the upper end of the piston rod, and the first spring is in a compressed state. This invention features a simple structure and ingenious design. The first spring-energy-storing negative pressure triggering mechanism enables the collection device to automatically collect leachate at regular intervals, eliminating the need for manual extraction and saving labor costs. Furthermore, the device is a purely mechanical structure, requiring no power supply, allowing for unrestricted field operations, meeting market demands, and is suitable for widespread adoption.

The invention discloses a self-adaptive adjustment downhole throttling device and an operation method. The self-adaptive adjustment downhole throttling device comprises a putting assembly, a clamping assembly, a sealing assembly and a throttling assembly. The throwing assembly comprises a lowering head, a first elastic piece and a fishing head. One end of the lowering head extends into the fishing head and is connected with the fishing head; one end of the clamping assembly penetrates through the fishing head and is connected with the lowering head; the first elastic piece is arranged on the outer side of the clamping assembly in a sleeving mode, one end of the first elastic piece abuts against the step face of the clamping assembly, and the other end of the first elastic piece abuts against the end face of the lowering head. One end of the clamping assembly is connected with the feeding assembly, and the other end of the clamping assembly is connected with the sealing assembly; the end, away from the throwing assembly, of the sealing assembly is connected with a throttling assembly. Two-stage pressure triggering type stable clamping and convenient deblocking are achieved, throttling area automatic adjustment based on real-time monitoring and graded efficient sand prevention are achieved, the reliability and production safety of the device under the complex well condition are remarkably improved, and the service life of the device under the complex well condition is remarkably prolonged.

The invention discloses a control method for a pressure regulation type air inlet unloading air compressor, relates to an air compressor, and solves the technical problems that the loading time of the air compressor is long and the energy consumption of an engine is increased due to the fact that a traditional single high-pressure unloading mode cannot meet the requirements of different devices. The method comprises the steps that an electronic unloading valve is installed on an air compressor, the electronic unloading valve is connected with an air storage tank through an air pressure feedback pipe, the pressure limit value of the electronic unloading valve is set to be reference pressure P0, the air pressure needed by a vehicle braking system and an air using working device is obtained, and an unloading adjusting mechanism is triggered according to the needed air pressure and the reference pressure P0. Unloading of the air compressor is dynamically adjusted, and energy consumption of the engine is reduced.

The invention relates to the technical field of patient restraint devices, in particular to a pressure regulation restraint device for preventing a tightening injury patient, which comprises a restraint bed board, two movable bed frames, a synchronous driving component, a trunk restraint mechanism, a leg restraint mechanism and an arm restraint mechanism. Wherein the trunk restraint mechanism, the leg restraint mechanism and the arm restraint mechanism are respectively used for carrying out partition restraint on corresponding body parts of a patient. A pressure adjusting assembly and a central control unit are further arranged, the pressure adjusting assembly comprises a pressure triggering unit and an air bag pressure relieving unit, and the restraining pressure on the patient can be monitored and dynamically adjusted in real time. According to the device, the body of a patient is uniformly wrapped through the flexible belt and the air bag, the pressure is adjusted, the tightening injury caused by too tight restraint is effectively avoided, the restraint safety, comfort and humanization level are improved, and the device is particularly suitable for medical scenes such as the psychiatry department.