1825 results about "Gas pressure" patented technology

The invention discloses a pneumatic sampling device and method for high-water-content muddy soft soil, and relates to the technical field of dredged sludge sampling devices.The pneumatic sampling device comprises a sampling cavity, a sampling opening is formed in the side wall of the sampling cavity, a flexible sampling container is arranged in the sampling cavity, and the opening end of the flexible sampling container faces the sampling opening; the valve plate is slidably connected to the outer side of the sampling opening; the gas transmission rod is fixed on the sampling cavity and is communicated with the interior of the sampling cavity; the gas path control mechanism is communicated with the interior of the sampling cavity through a gas transmission rod; the pneumatic driving part is arranged on the sampling cavity and is pneumatically connected with the gas path control mechanism, and the driving end of the pneumatic driving part is in transmission connection with the valve plate; wherein the pneumatic driving part can be driven by the gas path control mechanism to drive the valve plate to move to open or close the sampling port, and the gas pressure in the sampling cavity can be changed by the gas path control mechanism, so that the flexible sampling container expands to suck a soil sample, or the flexible sampling container contracts to discharge the soil sample.

The invention discloses high-pressure fuel gas pressure regulating equipment in the technical field of fuel gas pressure regulating equipment, which comprises a valve body, and a valve rod, a reset spring and a gas inlet box which are arranged on the valve body, a valve seat and a diaphragm are arranged on the valve rod, the gas inlet box is communicated with a gas outlet of the valve body through a guide pipe, and a detection assembly is arranged in the gas inlet box; the detection assembly comprises an air pressure detection piece and a displacement detection piece, and a warning indicator is arranged on the air inlet box and used for giving an alarm when the air pressure detection piece detects that the air pressure below an inner cavity of the air inlet box is lower than a threshold value and the displacement detection piece does not detect that the valve rod moves. The high-pressure gas pressure regulating equipment is detected through the detection assembly, when the air pressure detection piece detects that the air pressure below the inner cavity of the gas inlet box is lower than a threshold value and the displacement detection piece does not detect that the valve rod moves, the warning indicator gives an alarm to remind a user, so that problems can be found in time, further deterioration of the faults is avoided, and the service life of the user is prolonged. And the probability of potential safety hazards is reduced.

The invention belongs to the technical field of exhaust valves, and particularly relates to a composite exhaust valve with an integrated buffering and filtering assembly, which comprises a shell, a supporting block is fixedly arranged at one end of the shell, an air inlet head is fixedly arranged on the supporting block, a cavity is formed in the supporting block, a concave groove is formed in the cavity, and a sealing strip is arranged at the top of the concave groove. Cylinders are connected to the bottom of the concave groove in an array mode, a connecting rod is fixedly arranged at the bottom of the concave groove, a bottom plate is fixedly connected to the bottom end of the connecting rod, and a buffering mechanism is arranged in the cavity. According to the composite exhaust valve with the integrated buffering and filtering assembly, by arranging the filter cylinder and the baffle, efficient buffering and filtering treatment can be conducted on conveyed air pressure, stable operation of pneumatic equipment is guaranteed, the conveyed air pressure enters the cavity after being filtered through the filter cylinder, impurities such as particles in an air source can be effectively intercepted, and the effective circulation section of compressed air can be changed by adjusting the angle of the baffle; the narrower the circulation space is, the slower the airflow speed is, throttling buffering is achieved, and the working stability of the exhaust valve is guaranteed.

The invention provides a compressor pressure relief structure, a compressor and an air conditioner. The compressor pressure relief structure comprises a first-stage compression assembly and a second-stage compression assembly. A first pressure relief channel is formed in the partition plate assembly, an assembly avoiding groove and a second pressure relief channel are formed in the second-stage air cylinder, at least part of structure of an opening and closing element is arranged in the assembly avoiding groove, and the opening and closing element can move in the assembly avoiding groove and the second pressure relief channel so that the second pressure relief channel can be communicated with or disconnected from the first pressure relief channel; the opening and closing element comprises a first end and a second end which are opposite to each other, the first end is opposite to the first pressure relief channel so as to bear the gas pressure of the first pressure relief channel, the second-stage air cylinder is further provided with a first back pressure channel, and the first back pressure channel can introduce exhaust gas of the compressor into the assembly avoiding groove; and the pressure acts on the second end so as to apply pressure to the second end. According to the compressor, the technical problem that in the prior art, a rivet pressure relief valve plate structure is adopted for a compressor, and flutter occurs can be solved.

The utility model discloses a building gas leakage monitoring device based on pressure signal, which comprises a shell, a display arranged on the shell, a connecting pipe positioned in the shell, an electromagnetic valve, a pressure sensor and a controller, the electromagnetic valve and the pressure sensor are arranged on the connecting pipe, the controller is connected with the pressure sensor, the electromagnetic valve and the display, and the display is connected with the controller. The controller is connected with a power supply, and two pipe ends of the connecting pipe form connecting ports on the shell. The gas leakage monitoring device is installed on a gas main pipeline behind the pressure regulating box, gas pressure data are collected through the pressure sensor, whether the gas pipeline leaks or not is judged through the controller, gas leakage can be effectively monitored, and gas use safety is improved; the system can provide guidance basis for building low-pressure gas pipeline maintenance operation and accident early warning, and can be widely applied to the field of safety operation of low-pressure gas pipelines.

The invention discloses a gas-water pulse pipeline flushing method, and particularly relates to the field of industrial cleaning. In the maintenance and new construction of a water supply pipeline, pipeline flushing is a key link for guaranteeing the quality of supplied water, and an existing gas-water pulse pipeline flushing technology is characterized in that air is compressed, and then high-pressure gas with a certain frequency is added into the pipeline to form discontinuous two-phase mixed high-speed flow with water, so that impurities, sludge and the like in the pipeline are driven along with the gas-water mixed high-speed flow; and then the water is discharged out of the pipe. The pressure of a traditional air-water pulse system is generally 0.5 MPa, and in actual operation, the pressure can be reduced to 0.3-0.4 MPa, so that the problem that the cleaning efficiency is reduced is solved. The pulse cleaning technology provided by the invention is based on a strict fluid mechanics theory, and a traditional gas-water pulse pipeline cleaning method is optimized. According to the technical scheme, on the premise that safety and reliability of the system are guaranteed, the impact performance is improved by more than 50% through air pressure improvement of 0.5 MPa to 0.7 MPa and dynamic adjustment of the nozzle angle through the double-loop dynamic coupling control framework, and a more efficient solution is provided for water supply pipeline cleaning.

The invention provides a sealing system and method based on a ring-type coal feeder, and relates to the technical field of sealing based on coal feeders, and the sealing system comprises a ring-type sealing body module, an air pressure compensation module, a dust recovery module and an intelligent control module. Dynamic sealing is achieved through elastic deformation of the annular sealing body module, and track gap changes are adapted; the air pressure compensation module provides adjustable air pressure to enhance sealing adhesion force; the dust recovery module effectively collects escaping pulverized coal through negative pressure, and waste and pollution are reduced; the intelligent control module monitors and adjusts parameters in real time, stable operation of the system is guaranteed, the metal hard pipe connection improves the stability of a gas path, the preset overlapping distance between the collecting cover and the sealing body enhances the recycling sealing performance, the sensor arrangement ensures accurate parameter monitoring, and efficient, stable and environment-friendly sealing of the ring type coal feeder is integrally achieved.

An injection device (2) of an injection molding machine (1) includes a heating cylinder (18) having a gas introduction port (30) and a screw (19), and a gas supply device (5) is connected to the gas introduction port (30). The gas supply device (5) includes a gas supply source (33) and a gas pressure regulating unit (34). The gas pressure regulating unit (34) regulates a gas pressure and supplies the gas when a gas from the gas supply source (33) is introduced into the gas introduction port (30). Specifically, the gas pressure is caused to change in a molding cycle and is increased to a high pressure in a metering process (61). That is, a pressure increasing period (71) in which the gas pressure increases at least partially overlaps with the metering process (61).

The invention discloses an SF6 gas density measurement and error compensation system based on dynamic segmented calibration, and relates to the technical field of gas pressure and density measurement, the SF6 gas density measurement and error compensation system comprises a gas pressure sampling module used for amplifying weak analog signals output by a pressure sensor and completing analog-to-digital conversion to obtain digital sampling data used for pressure calculation; the gas density calculation module is used for establishing a density solving model based on a preset physical state equation and outputting a gas density calculation value; and the gas density calibration module is used for carrying out segmented calibration on a pressure interval corresponding to a density calculation value by taking a preset reference pressure point as a reference and outputting a calibrated density measurement result. The invention provides a method for carrying out high-precision sampling and amplification on a weak signal, and solving the density based on rapid iteration of a Betti-Bridgman equation; the invention relates to an SF6 gas density high-precision measuring system which is linked with three systems and is dynamically segmented and asymmetrically calibrated by taking 0.5 MPa as a benchmark.

The invention discloses an energy-saving control system for dust removal equipment. The energy-saving control system comprises production equipment, a suction pipe net, an air door assembly, an air door control module, an air pressure detection device, a suction device and a main control module. The production equipment is provided with a machining area and a workpiece detection module. The suction pipe net is composed of a main pipeline and branch pipelines, and the branch pipelines correspond to all devices and are provided with air door assemblies. The air door control module opens and closes an air door according to the workpiece detection signal; the air pressure detection device monitors the air pressure of the main pipeline, the main control module adjusts the power of the suction device accordingly, and the system achieves on-demand dust removal, accuracy, high efficiency and remarkable energy conservation.

The invention discloses a preparation device and process of hydrophobic lightweight concrete, and relates to the technical field of concrete processing, the preparation device comprises a base, a pedestal, a die holder, a vibration mechanism, a pressing plate, a hydraulic cylinder, a height adjusting mechanism and a one-way valve structure; the height adjusting mechanism communicates with the exhaust channel and is configured to drive the pressing plate to descend relative to the hydraulic cylinder through the pressure of gas entering the exhaust channel so as to reduce the distance between the pressing plate and the upper surface of the raw material. According to the invention, the special one-way valve structure is arranged on the pressing plate and matched with the up-and-down reciprocating motion of the die holder, so that air extruded from raw materials can be actively exhausted to the exhaust channel in the vibration process, and most of air can be effectively exhausted even if the vibration time is relatively short, so that the tap density of the raw materials is ensured, and the production efficiency is improved. And the layering phenomenon of light and heavy materials caused by long-time vibration is avoided, so that the overall quality and the yield of the lightweight concrete are remarkably improved.

The invention relates to a gas leakage monitoring system and method, computer equipment and a computer program, and the system comprises a pressure sensor which is disposed on the inner wall of a gas storage shaft, is in communication connection with a controller, and is used for detecting the gas pressure in the gas storage shaft; the gas sensors are arranged on the inner wall and the outer wall of the gas storage shaft, are in communication connection with the controller and are used for detecting the gas concentration inside the gas storage shaft and the gas concentration outside the gas storage shaft; the ultrasonic sensor is arranged on the inner wall of the gas storage shaft, is in communication connection with the controller and is used for detecting a sound wave signal generated by gas leakage; and the controller is used for judging whether gas leakage occurs in the gas storage shaft or not through a preset risk grade judgment model according to the gas pressure, the gas concentration and the sound wave signal. According to the utility model, the monitoring accuracy and sensitivity are improved, real-time monitoring and early warning can be realized, the leakage position can be accurately positioned, and the safety and reliability of the monitoring system are improved.

The invention relates to the field of gas pressure anomaly detection, and particularly discloses a catering user gas meter pressure anomaly fluctuation risk early warning method which comprises the following steps: S1, based on historical gas pressure data, determining a pressure upper and lower limit threshold value and a pressure change rate threshold value, and constructing a dynamic gas consumption behavior model; s2, gas pressure data are monitored in real time, when a pressure value exceeds a corresponding threshold value range or a pressure change rate exceeds a corresponding threshold value, pressure abnormity early warning is triggered, and an abnormity type is identified; s3, based on the pressure overrun characteristic and fluctuation characteristic of the gas pressure curve, the risk grade is evaluated, and grading early warning is started; and S4, judging whether fluctuation is synchronous or not and carrying out fault positioning by synchronously analyzing time-space correlation characteristics of the gas pressure curve and the gas flow curve. Through multi-dimensional feature analysis, dynamic modeling and comprehensive risk assessment, abnormity can be accurately identified, a fault source can be distinguished, and the gas use safety and the operation and maintenance efficiency are effectively improved.

The invention relates to a method for testing the gas content of free gas and adsorbed gas in a deep coal seam. Starting pressure is used as a pressure point for determining the free gas and the adsorbed gas; the method comprises the following steps: reducing a pressure-maintaining coring cylinder placed in a whole section of a rock core to a reservoir temperature-pressure condition, carrying out a pressure-reducing exhaust experiment, reducing the pressure from the reservoir temperature to a starting pressure, and collecting the gas quantity and recording the gas quantity as free gas quantity; continuously reducing the pressure from the starting pressure to the atmospheric pressure, and recording the collected gas amount as the total amount of the free gas and the desorbed gas; after pressure reduction and exhaust are finished, the whole section of rock core is taken out from the pressure-maintaining coring barrel, a rock sample is taken, and the residual gas amount in the rock sample is measured and recorded as the residual gas amount of the rock sample; summing the unit mass free gas volume and the total amount of the unit mass free gas and the desorption gas, and subtracting the unit mass free gas volume to obtain a difference value which is the gas content of the unit adsorption gas. The method has important significance for formulating a targeted development strategy for deep coal rock gas.

The invention provides a device for simulating brine-sediment migration characteristics of a salt-cavern gas storage under the action of air pressure rise and fall and a test method. The simulation test device comprises a gas injection system, a simulation salt cavity, a gas production system, a brine discharge system, a temperature regulation and control system and a pore pressure measurement system. The gas injection system is connected with the simulated salt cavity through a gas injection pipe; the gas production system is connected with the simulated salt cavity through an exhaust pipe; the simulated salt cavity and the brine recovery device are connected through a simulated brine discharging pipe and a water discharging pipe; and the temperature regulation and control system and the pore pressure measurement system are connected with the simulated salt cavity through pipelines. The test device is reasonable in design, through an indoor simulation test, the brine and sediment migration rule under the free sinking condition, the sediment gap structure evolution rule under the self-weight compaction effect and the brine and sediment secondary migration rule under gas injection and production can be researched, and reference is provided for reasonable setting of injection and production operation parameters of the salt cavern gas storage.

The invention discloses a safety monitoring method and system for a gas pressure reducer, and belongs to the technical field of mechanical equipment state monitoring, and the method comprises the steps: obtaining the outlet pressure, flow, valve body temperature and vibration signals of the gas pressure reducer, and obtaining multi-source monitoring data; working condition excitation is applied to the gas pressure reducer, changes of the multi-source monitoring data in the excitation period are synchronously collected, and excitation response data are generated; extracting pressure recovery time, vibration spectrum change and temperature change gradient from the excitation response data, and combining the pressure recovery time, the vibration spectrum change and the temperature change gradient into a dynamic feature set; performing coupling response analysis on the dynamic feature set to identify a response mode representing the health state of the internal mechanical part; based on the response pattern, a health status of the gas pressure reducer is quantitatively evaluated, generating a health index. By means of actively applying working condition excitation and carrying out coupling analysis on multi-source response data, the early failure mode of the internal mechanical part can be recognized, and the health state of the internal mechanical part can be quantitatively evaluated.

The invention relates to the technical field of coal mine safety mining and rock stratum control, and discloses a deep roadway surrounding rock multi-parameter dynamic regulation and control method which comprises the following steps: firstly, dividing a monitoring area and collecting gas pressure, surrounding rock displacement, gas release amount and stress data in real time; then calculating a gas pressure influence index and a surrounding rock stress response coefficient representing multi-field coupling characteristics based on the collected data; inputting the characteristic indexes into a pre-trained multiple regression model, and calculating to generate a surrounding rock stability evaluation coefficient of each region; and finally, dynamically dividing the monitoring area into a stable area, an early warning area or an unstable area according to a comparison result of the evaluation coefficient and a set threshold interval, and respectively executing differentiated support regulation and control measures such as current situation maintenance, support strength increase or grouting reinforcement. According to the method, dynamic accurate evaluation and active fine management of the stability of the surrounding rock of the deep roadway are realized by quantifying the coupling effect of a gas field, a stress field and a displacement field.

The invention belongs to the technical field of material forming and manufacturing, and discloses a hot gas expansion-explosion composite forming method for forming a complex deep-cavity thin-wall component. According to the hot air expansion-explosion composite forming method, a mold unit, an air pressure loading unit and an explosion unit are needed; the method comprises the following steps: mold preheating; feeding and die assembly are carried out; compressed air is filled, and pre-expansion is carried out; fuel is sprayed, and explosion forming is conducted; releasing pressure; and opening the mold and taking the part. The method has the advantages that hot gas bulging forming utilizes metal high-temperature plasticity and evenly-distributed flexible air pressure loading, and the plate forming performance is improved; explosive forming has a very high deformation rate, high plastic deformation can be achieved within a very short time, and the forming performance of the plate can be further improved through the combined action of the strain rate effect and the inertia force. According to the method, the plastic deformation capacity of the material can be remarkably improved by combining the two, and forming of the complex deep-cavity thin-wall component is facilitated.

The invention discloses a combined environment monitoring linkage control device, relates to the technical field of environment monitoring, and provides the following scheme that the combined environment monitoring linkage control device comprises a hollow stand column, a communicated spherical shell is installed at the top end of the stand column, a plurality of embedded frames are installed on the spherical shell, and a fixed column is fixedly connected to the interior of the spherical shell; a plurality of sliding rods corresponding to the embedded frames are mounted on the fixed column, sliding blocks are slidably connected to the sliding rods, mounting blocks are fixedly connected to the sliding blocks, telescopic blocks are slidably connected to the mounting blocks, a monitoring module is mounted on the telescopic blocks, a carrying frame is fixed to the embedded frames, an air injection groove is formed in one side of the carrying frame, and a cleaning brush is rotationally arranged in the stand column. The monitoring module is retracted into the spherical shell by driving the telescopic block to contract, so that the monitoring module is protected, positive air pressure is formed when the air spraying groove sprays out air, external air and dust are prevented from entering the spherical shell, the monitoring module makes contact with the cleaning brush, and the cleaning brush can clean the monitoring module and a carried sensor when rotating.

The invention provides a metal plate laser cutting machine, and belongs to the technical field of laser cutting equipment, the metal plate laser cutting machine comprises a cutting table, a portal frame and a control console, the portal frame is connected with a moving table, the moving table is connected with a laser cutting assembly, the laser cutting assembly comprises a laser seat, a connecting seat and a butt joint seat, and an electric sliding block is arranged on one side of the connecting seat; a focusing assembly is arranged in the connecting seat, a cleaning assembly is arranged in the butt joint seat, and the gas guide assembly is used for transmitting gas; the detection assembly is used for detecting the pressure of the gas; the device has the beneficial effects that the gas guide assembly adopts a flexible communicating pipe to realize stable transmission of gas, cutting slag is efficiently blown off through high-pressure gas, heat is dissipated for the focus lens through gas flow, the optical performance is prevented from being influenced by high temperature, meanwhile, the gas is shunted to the detection assembly, the gas pressure state can be visually fed back through linkage of a piston cavity and a reed, and the detection accuracy is improved. And molten slag outside the nozzle can be cleaned through split-flow gas, so that the service life of the nozzle is prolonged.

The invention discloses a sample capsule conveying device based on speed reduction and whole-course round-trip. The sample capsule conveying device comprises a whole-course round-trip unit arranged between a sample irradiation point and a sample rotating disc. The first speed reducing mechanism is arranged close to the sample irradiation point; the second speed reducing mechanism is arranged close to the sample turntable; the whole-course reciprocating unit is provided with a sample capsule conveying pipeline and three branch pipelines, including a first speed reducing pipeline, a back flushing pipeline and a second speed reducing pipeline; gas flow is back-blown through the back-blowing pipeline to directly push residual sample capsules in the pipeline back to a starting point, and meanwhile, gas is discharged to a waste gas concentration position at a gas source air compressor through the first speed reduction pipeline, the second speed reduction pipeline and the back-blowing pipeline; the first and second speed reducing mechanisms close the branch air pipe to increase the air pressure of the sample capsule conveying pipeline, so that the speed reducing process before the sample capsule reaches a target point is realized. The problem that a sample is prone to damage is solved through active speed reduction and passive damping, and durability and stability of a power source are guaranteed through the design of gas recovery.

The invention discloses an air suspension rigidity self-adaptive adjusting system based on double-temperature feedback. The data monitoring and collecting module is used for monitoring and collecting the gas temperature in an air spring airbag cavity, the rubber temperature of the outer surface of an airbag, the gas pressure in the air spring airbag cavity, the gas volume in the air spring airbag cavity, the airbag height and the current vehicle working condition. The coupling rigidity calculation module is used for establishing a rubber rigidity model and calculating the rubber rigidity according to the rubber body temperature of the outer surface of the airbag and the airbag height; the inflation and deflation control module is used for generating target total rigidity according to the current vehicle working condition, calculating target gas pressure in the air spring airbag cavity according to the target total rigidity, the rubber rigidity, the gas temperature in the air spring airbag cavity and the gas volume in the air spring airbag cavity, and sending an inflation and deflation control instruction to inflation and deflation equipment; and the air pressure Pg in the air spring airbag cavity reaches the target air pressure in the air spring airbag cavity.

A damper link associated with a sway bar system is disclosed. The damper link can include a damper chamber with a first fluid reservoir, a shaft configured to move in an out the damper chamber, and a piston. The damper link can further include a negative gas chamber housed in the damper chamber wherein a gas in the gas chamber is compressed or decompressed by a movement of the piston. The damper link can further include an additional reservoir with a positive gas chamber. The damper link can further include a hose fluidly connecting the negative gas chamber to the positive gas chamber to maintain a constant gas pressure between the negative gas chamber to the positive gas chamber.

The invention discloses a stationary pollution source carbon emission continuous monitoring device, and relates to the technical field of air pollution detection, the stationary pollution source carbon emission continuous monitoring device comprises a case and a driving assembly, one side of the case is fixedly provided with a monitor main body, the bottom of the case is provided with a fixed pipe, and the outer side of the lower end of the fixed pipe is rotatably connected with a reversing pipe; and filters are arranged in the two ends of the reversing pipe. When the carbon emission content of a pollution source is monitored, the motor is started firstly, the sliding seat is driven to reciprocate through the double-output-shaft speed reducer and the reciprocating lead screw, the piston rod slides in one cavity in the case in a reciprocating mode, and therefore the air pressure change in the case is adjusted; the inside of one end of the reversing pipe is communicated with the inside of the case through the fixing pipe, so that external to-be-detected gas can be sucked into the case through the first one-way valve, and at the moment, the carbon dioxide sensor probe on the monitor main body can monitor the carbon content of the air.

The invention relates to the technical field of sampling purging, and discloses a sampling pipeline purging auxiliary device. The supporting mechanism comprises a sampling sleeve, a soot blowing end fixedly arranged at the top of the sampling sleeve, a conveying rod at the bottom of the soot blowing end, and a cleaning end elastically connected with the bottom of the soot blowing end; the gas guide mechanism comprises a moving cavity formed in the sampling sleeve, a sealing block fixed at the bottom of the moving cavity, a transmission plate sliding along the inner wall of the sealing block, and an adjusting plate which is in torsion connection with the inner wall of the sampling sleeve and is positioned above the transmission plate; the reset mechanism comprises an air pressure module fixedly arranged on the outer wall of the sampling sleeve and a starting block embedded in the inner wall of the sampling sleeve. And the cleaning end head can effectively treat condensed blocks and can be matched with compressed air flow entering the cleaning end head in the resetting process, residual dust on the surface of the cleaning end head can be cleaned by the way, and the effect of active maintenance can be achieved. Intermittent cleaning can be achieved without continuously inputting compressed air, energy is saved, and meanwhile cleaning is remarkably improved.

Techniques for detecting a high gas pressure situation within a gas delivery system (e.g., for natural gas delivery to homes and businesses) are described. In one example, a device measures gas pressure. If a pressure over a threshold value is detected, a nearby device is messaged. The nearby device either confirms the over-pressure condition or indicates it may be more localized. If the condition is present within an area of the gas delivery system and / or within a group of devices within the gas delivery system, protective measures may be taken, such as closing valves providing gas to a number of service sites.

The utility model provides a gas pressure regulator gas tightness test device, relates to the pressure regulator gas tightness detection technology field, and comprises a test protection shell and a closed pressure detection mechanism, the inner side of the test protection shell is provided with the closed pressure detection mechanism, when in use, through the arrangement of a sealing assembly, the closed pressure detection mechanism can detect the gas tightness of the gas pressure regulator. A sealing rubber strip is clamped at the joint of the test protection shell and the sealing top shell, and is in threaded connection and fixation through fixing rings extending from the two sides, so that the airtightness in the airtightness detection process is further ensured to be complete, and when the pressure regulator is fixed inside, the airtightness of the pressure regulator can be detected by supplying gas for airtightness detection to the inside of the gas injection assembly. According to the invention, the air tightness of the pressure regulator is detected, and in the detection process, the vacuum air extraction assembly arranged at the rear side of the test protection shell drives the air extraction opening to completely extract the interior through the air pump, so that the interior of the test protection shell is in a vacuum state, and therefore, the pressure regulator can be ensured not to be influenced by the test environment in the air tightness test process.

The invention relates to the technical field of water conservancy projects, and discloses an estuary channel erosion and deposition control method and system based on water column wave energy collection and release. According to the method, wave energy is captured through an oscillating water column air chamber with a bottom opening, bidirectional airflow is converted into unidirectional high-pressure airflow through an airflow rectifying unit, and the unidirectional high-pressure airflow is stored in a high-pressure energy storage container; the system monitors the flow velocity of a channel and the air pressure of the energy storage container in real time, only when the flow velocity meets a preset ebb tide transportation condition and the air pressure is higher than a critical threshold value, a trigger instruction is generated, after the instruction is responded, high-pressure gas is injected into the gas-liquid replacement excitation cavity sinking to the bottom, and water in the driving cavity forms high-speed hydraulic jet flow through a Laval nozzle to impact bottom mud. After jet flow is finished, the cavity exhausts air and relieves pressure, the external water body reversely flows back through the hydrostatic pressure of the environment, and suspended sediment is entrained and sucked. Through the cyclic operation, energy self-sufficiency, intelligent opportunity selection operation and efficient dredging are achieved, the operation cost and the environmental influence are reduced, and the method is suitable for remote and unattended navigation channel maintenance.

The utility model discloses a kind of gas pressure reducer, and the pressure reducer main body includes shell body, air inlet unit is arranged below shell body, gas cavity in shell body, the end of shell body away from air inlet unit is provided with first gas outlet and second gas outlet;Adjusting assembly is arranged in the pressure reducer main body;Second gas outlet is opened and closed by adjusting assembly;Gas is entered into gas cavity by air inlet unit, and is discharged by first gas outlet to form first air passage;Gas is entered into gas cavity by air inlet unit, and second gas outlet is opened by operating adjusting assembly, gas is discharged by second gas outlet and first gas outlet simultaneously to form second air passage;First air passage is in normal open state, the utility model structure design is reasonable, by being provided with first air passage and second air passage, so that user can select different air passage in different use environment, first air passage is in normal open state, so that gas will be continuously discharged from first air passage without interruption.

1. The name of the design product: double inlet centrifugal fan. 2. The use of the design product: fan for increasing gas pressure and discharging gas. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.