48 results about "Pressure triggering" patented technology

The invention is suitable for the technical field of intelligent security, and provides a security alarm method and system, and the method comprises the steps: responding to a pressure triggering signal, rapidly obtaining the real-time monitoring image information, carrying out the target detection processing of the real-time monitoring image information based on a target detection algorithm, generating the climbing event information, and carrying out the detection of the climbing event information. Finally, an alarm signal is effectively generated based on the climbing event information. According to the method and the system, the behavior that the personnel climb the wall illegally can be accurately identified, and an alarm is quickly sent to a security center, so that the security personnel can know potential threats in time and make a response quickly, the overall security protection level is remarkably improved, the security personnel are assisted to make a more effective security strategy, and the security is further improved.

The invention relates to a magnesium steam dynamic flow guide baffle, a magnesium ingot reduction device and a manufacturing method. The magnesium steam dynamic flow guide baffle comprises a shell, a base and a dynamic adjusting mechanism. The shell is matched with a tank opening of the magnesium ingot reduction tank in size; the end, close to the crystallization barrel, of the shell is open, and the other end is provided with an air inlet. The base is mounted in the opening, and a movable cavity is reserved between the base and the air inlet; at least one air outlet and at least one mounting cavity are formed in the base; the air outlet penetrates through the base and is used for communicating the movable cavity with the outside. According to the invention, the dynamic adjusting mechanism is arranged; closed-loop regulation of pressure triggering-dynamic pressure relief-automatic reset is formed, sudden pressure rise is effectively avoided, and the pressure in the reduction tank is kept stable, so that the pressure load of the reduction tank is effectively reduced, the service life of equipment is greatly prolonged, meanwhile, magnesium steam can be relatively uniformly distributed, and the service life of the equipment is prolonged. And a large amount of magnesium steam produced in the reduction tank cannot enter the crystallization barrel in a short time, so that the crystallization effect is greatly improved.

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, and a cavity for storing media is formed between the inner bottle and the outer bottle; 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 utility model discloses a temperature sensing fire source detector which comprises a temperature sensing structure used for detecting environment temperature and a pressure storage structure used for storing high-pressure gas, the temperature sensing structure is arranged on a trigger assembly, and a puncture assembly is arranged between the trigger assembly and the pressure storage structure. The trigger assembly moves in the trigger direction to drive the puncture assembly to puncture the pressure storage structure so as to release high-pressure gas into the gas outlet channel. The pressure storage structure is arranged for storing the high-pressure inert gas, when the environment temperature is too high, the temperature sensing structure deforms and does not limit the triggering assembly any more, the triggering assembly moves in the triggering direction and drives the puncture assembly to get close to the pressure storage structure and puncture the pressure storage structure, and the high-pressure inert gas is released to the gas outlet channel to be sprayed out; and the gas enters an external pressure trigger switch or a fire extinguishing system trigger pipeline to drive the starting of the whole fire extinguishing system, so that the quick response is realized, the smoke interference is avoided, the fire does not need to be fired on site, and the fire extinguishing efficiency is improved.

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 present invention belongs to the technical field of drilling fluid testing, and in particular, relates to a high-temperature and high-pressure testing protection device for drilling fluid, comprising a base, an air pump is fixedly installed at the bottom of the base, and an air supply mechanism is installed together with the output end of the air pump and the base, a cavity is opened on the inner upper side of the base, and the cavity is connected with the air supply mechanism, a hose connector is fixedly inserted into the cavity wall of the cavity, and a pressure trigger prompt mechanism is installed inside the cavity. The present invention can timely and effectively remind test personnel of damage and leakage of soft hoses through double detection, thereby achieving the effect of protecting test personnel, and can assist in the removal of drilling fluid cups, with simple operation, reducing the possibility of scalding, and improving the protection effect on personnel. At the same time, it can remind personnel to conduct various inspections of the test, prevent missed inspections, improve test safety, and assist in cooling the drilling fluid cup after the test.

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 invention discloses an automatic detection device suitable for geological disaster prevention and control, and belongs to the technical field of geological disaster prevention and control. Comprising a wire guide device, two automatic detection devices and a wire guide unit, each automatic detection device comprises a detection bin seat, and a crack monitoring unit and a pressure triggering unit are fixed to the inner side of each detection bin seat; the pressure triggering unit comprises a pipe seat, a convex guide seat is fixedly embedded in the end of the pipe seat, a first pull rod is fixed to the center of the outer end of the convex guide seat, a second pull rod movably penetrates through the center of the end, away from the first pull rod, of the pipe seat, the second pull rod and the convex guide seat are movably embedded, and a stress disc is fixed to the second pull rod. According to the automatic detection device suitable for geological disaster prevention and control, a whole crack, a local crack and a secondary crack can be synchronously monitored, and accumulated errors of long-term crack monitoring can be eliminated.

The present invention provides a self-healing support system for altered surrounding rock in a pumped storage power station, which relates to the technical field of underground structure support and includes: a fractal anchoring structure, including a main anchor rod and a number of multi-stage bifurcated anchor rods arranged along the length extension direction of the main anchor rod. A grouting main pipe is arranged inside the main anchor rod, and grouting branch pipes are arranged inside the multi-stage bifurcated anchor rods. The grouting main pipe and the grouting branch pipes are connected; a number of hydraulic gradient-responsive hierarchical repair structures are evenly distributed on the main anchor rod and the multi-stage bifurcated anchor rods; wherein, the hydraulic gradient-responsive hierarchical repair structure at least includes a first-level repair unit, and the first-level repair unit includes a first repair agent and a first pressure-triggering membrane wrapping the first repair agent. When the seepage pressure in the altered surrounding rock reaches a first threshold value, the first pressure-triggering membrane ruptures to release the first repair agent to fill the cracks. The present invention has the advantages of improving the anchoring effect, automatically repairing cracks, enhancing the stability of the surrounding rock, and adapting to different seepage pressures.

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 invention discloses a pressure trigger prompting device and method for suspension pesticide proportioning equipment, and relates to the technical field of proportioning equipment pressure prompting.The pressure trigger prompting device comprises a proportioning transfer tank on a bottom frame, a first supporting ring and a second supporting ring are arranged in the proportioning transfer tank, a pulley is hinged to the first supporting ring, and a bearing ring is clamped by a supporting plate on the inner side of a supporting column; the bearing ring is connected with a transmission shaft, the bottom end and the top end of the transmission shaft are provided with a first turbofan wheel and a second turbofan wheel respectively, the top of the second supporting ring is connected with a vertical rod, the top end of the vertical rod is provided with a first sliding plug arranged in a conduction pipe, the conduction pipe is communicated with the first cylinder body, and the top end of the second cylinder body is provided with an alarm prompter. A trigger switch is installed at the bottom end of the alarm prompter, and a trigger rod is connected to the top of the third sliding plug. The pressure of the inner cavity of the proportioning transfer tank body can be monitored in real time, irreversible damage to the transfer tank body is avoided, the production risk is reduced, and the production safety is guaranteed.

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.