38 results about "Pressure jump" patented technology

The invention relates to a seabed natural gas hydrate slurry decomposition separation and silt removal modular mining system, which comprises a seabed excavating robot, a seabed decomposition separation and siltremoval gathering and transportation treatment station, an offshore mining operation platform and a seabed silt backfilling robot, wherein the seabed decomposition separation and silt removal gathering and transportation treatment station realizes fast connection with the seabed excavating robot, the offshore mining operation platform and the seabed silt backfilling robot through an integrated passage and fast plugs; devices in the gathering and transportation station are connected with fast sockets arranged on the inner wall of a sealed cabin through the fast plugs; the hydrate slurry is stored, decomposed and separated; the separated hydrate slurry is conveyed to an offshore platform; the separated silt is backfilled in situ by the seabed silt backfilling robot. The system has the beneficial effects that the problems of great energy consumption in the conveying process of directly lifting silt-containing slurry, easy occurrence of sand blockage in the pipeline conveying process, pipe explosion due to pressure jump in the pipeline and the like are solved; fast connection, operation and maintenance can be conveniently realized among the modules.

The invention relates to a friction welding axial deformation precision control process. The friction welding axial deformation precision control process includes a rotating workpiece 1, a moving workpiece 2, a spindle system 3.1, a rotating member fixture 3.2, a moving sliding table system 4.1, a moving member fixture 4.2, a welding loading mechanism 5, a lathe bed 10.1, a guide rail moving pair10.2, a power-driven system 11, a hydraulic system and connecting line 12, a torque sensor 6, a displacement sensor 7, a pressure sensor 8 and a friction welding control system 9. Based on friction torque jump/axial welding pressure jump determination conditions, the problem of automatic measurement of workpiece axial dimensional precision in the welding preparation process and the problem of accurate compensation of the spacing generated by the rotating workpiece and the moving workpiece in the welding process are solved, the accurate control over the axial shortening amount of the friction welding is realized, and the axial dimensional precision of an axial friction welding workpiece and the quality of friction welding products are improved.

The invention discloses a new spring damping device for coping with pipeline pressure jump, comprising a box body of which the front and rear ends are arranged symmetrically; the box body is a revolving body formed by a curve rotating around an axis for a circle, and both ends of the box body are coaxially provided with connecting devices with the same diameters used for connecting upstream and downstream gas pipelines; a damper system and a spring system are arranged in the box body, a spring coil in the spring system moves back and forth as the upstream gas pressure changes so as to drive 4 damper in the damper system to move, resulting in gas circulation area change, and the purpose of stabilizing pressure and flowrate is achieved. In the invention, no external energy or other substances are required, and the new spring damping device has the advantages of simple structure, easy installation and maintenance, and flexible speed adjustment; the influence of upstream pressure jump on downstream pipelines, instruments and equipment is reduced effectively to ensure the safe and steady operation of the pipeline.

The invention discloses an energy feedback shock absorber with damping stiffness changing along with a road condition. The energy feedback shock absorber adopts a combined piston structure, through the combination of a first bent circuit throttle oil way and a second bent circuit throttle oil way, oil liquid in the upper cavity of a cylinder barrel is connected with a hydraulic system through the first bent circuit throttle oil way and the first oil way of a piston rod, oil liquid in the lower cavity of the cylinder barrel is connected with the hydraulic system through the second bent circuit throttle oil way and the second oil way of the piston rod, pressure oil flow circulation generation is realized, and the vibration energy of the shock absorber is converted into storable electric energy; a gas bag arranged at the bottom of the cylinder barrel is communicated with an oil-gas separation pressure balance type energy accumulator gas cavity, the volume of the gas bag is increased or decreased through the elastic deformation of the gas bag, and the problem that the changes for the volumes of the upper cavity and the lower cavity of the cylinder barrel are unequal when the piston slides is effectively solved; a control device appropriately delays the opening time of a related electromagnetic check valve according to pressure jump feedback obtained by a first pressure sensor and a second pressure sensor, and the adaptive control that the damping stiffness of the shock absorber changes along with the road condition is realized, so that the frequency and amplitude of vibration between a frame and an axle is reduced, and the frame can be effectively protected from being damaged.

The invention discloses a fluid damping device used for coping with pipeline pressure jump. The fluid damping device comprises a box body. The box body is in a shape like a rotation body, wherein an ovoid curve rotates around the axis by a cycle to form the rotation body; and the two ends of the box body are coaxially provided with an outlet, an inlet and a connecting device for connecting an upstream gas pipeline with a downstream gas pipeline. Multiple groove pipes pointing to the outlet are evenly distributed on the inner wall, close to the outlet, of the box body in a spaced manner in a peripheral direction. The radian of the groove pipes is consistent with that of the inner wall of the box body. A plastic ball is smooth in surface and is movably placed in an inner cavity of the box body. The diameter of the plastic ball is larger than the diameter of the upstream gas pipeline and the diameter of the downstream gas pipeline. By changing the circulation area and the local resistance coefficient, the response time of downstream pressure jump is prolonged, the purpose that pressure is adjusted slowly is achieved, the structure and the principle are simple and clear, the fluid damping device is easy to mount and maintain, sensitive to response and fast in adjustment, the influence of upstream pressure jump on downstream pipeline instruments and equipment is relieved, the operating cost of enterprises is lowered, and safe and stable operation of the pipelines is guaranteed.

The invention discloses a snow sweeping device suitable for an uneven road surface with accumulated snow and an operation method. The snow sweeping device comprises a two-stage extensible device, a rotary device, a fixing rod, a broom and a control system, wherein the two-stage extensible device is installed on a walking carrier through a posture adjustment device, the top of the fixing rod is connected with the lower end of a first-stage extensible rod of the two-stage extensible device through the rotary device, the lower end of a second-stage extensible rod is provided with a first pressuresensor, a second pressure sensor capable of detecting the contact pressure between the broom and the ground is arranged in the broom, the posture adjustment device drives the broom to descend to thesnow surface, then the first-stage extensible rod drives the first pressure sensor to descend and measure a pressure jump value Q of the contact between the sensor and the ground, the value serves asa set value of the second pressure sensor, and the height of the broom is constantly adjusted so as to meet the demand for shoveling snow on the uneven road surface. The snow sweeping device can better adapt to uneven road sections, can quickly remove accumulated snow which cannot be shoveled off by a forklift and is high in working efficiency, and the broom is long in service life.

The invention relates to a method for determining the zones of a stratified porous medium whose physical properties are known, wherein the front or interface between fluids in place and injected flushing fluids moves in a stationary manner, without using a complete flow simulation. Starting from an a priori defined front form which separates two zones of uniform saturation, assumed to have a stationary displacement, the pressure field is determined independently in each zone. The pressure jump on either side of the front is then evaluated for any point of the interface. If it is zero, the form of the front is such that it can move in a stationary manner in the medium. If the pressure jump is not zero, the user deforms the interface and resumes the process until a stationary form is obtained. This process may not converge. In this case, we consider that a stationary front cannot form through the total thickness of the medium and the medium is divided so as to seek solutions in intermediate zones.

The invention discloses an adjusting system and method for preventing fire extinguishing caused by a pressure jump of a dry bottom hopper of a coal-fired boiler. An upper dilution bellows, pressure relief safety valves and a lower dilution bellows are arranged in the region of the dry bottom hopper in the height direction from top to bottom. The upper dilution bellows and the lower dilution bellows are each divided into a plurality of dilution air bins by dilution air bin partitions. The air volume of each dilution air bin is controlled by a flow adjusting valve on a bellows communication tube independently. Smoke measuring devices are connected to water cooled walls of coverage regions of the dilution air bins through smoke sampling tubes and communicate with a control system. According to the adjusting system and method, the content of CO gas in different regions of the dry bottom hopper can be controlled automatically through dilution air, and the fire extinguishing accident caused by the pressure jump of the dry bottom hopper of the boiler due to deflagration of the CO gas is effectively prevented; meanwhile, pressure relief can be performed on a hearth in time through the pressure relief safety valves in the region of the dry bottom hopper, and the fire extinguishing accident caused by the pressure jump of the dry bottom hopper of the boiler due to coke dropping of the hearth is prevented.

The invention discloses a magnetic one-way valve. The magnetic one-way valve comprises a valve body, a valve core, a compression nut and an adjusting ring and is characterized in that two sides of the valve body are provided with steering magnetic adjusting rings, the direction of the one-way valve is quickly replaced under the condition that a pipeline is not dismantled, and simultaneously opening pressure is adjusted to prevent overpressure, relieve pressure jump and filter magnetic impurities including scrap iron and the like in the pipeline. The magnetic one-way valve is simple in structure, safe, reliable and multipurpose.

The invention provides a pipeline conveying system, a concrete pump truck and concrete conveying equipment. The pipeline conveying system comprises a conveying pipeline and a buffer device, wherein the conveying pipeline is used for conveying material in a pulse state; the buffer device comprises an air source, an air storage tank and an air conveying pipeline; the air source is connected with the air storage tank to supply air to the air storage tank; the air conveying pipeline is provided with an air inlet and an air outlet; the air inlet of the air conveying pipeline communicates with the outlet of the air storage tank; and the air outlet of the air conveying pipeline communicates with the conveying pipeline to convey air flow, of which the flowing direction is consistent with that of the material in the conveying pipeline, into the conveying pipeline. Through application of the technical scheme, the buffer device conveys air flow, of which the flowing direction is consistent with that of the material in the conveying pipeline, into the conveying pipeline to alleviate the situation of pressure jump in the conveying pipe and effectively alleviate the problem of shaking.

The invention discloses a control method and system for preventing pressure jump of a train passenger compartment in a long tunnel. The control method for preventing pressure jump of the train passenger compartment in the long tunnel comprises the steps of obtaining a first platform where a train currently stops and a second platform where the train is going to head for before the train is dispatched from the first platform; when it is determined that there is a ventilation shaft between the first platform and the second platform according to preset platform ventilation shaft information, obtaining position information of the ventilation shaft from the preset platform ventilation shaft information; after the train is dispatched from the first platform, determining a distance between the train and the ventilation shaft according to the position information of the ventilation shaft and the running distance of the train from the first platform; when the train does not run to the ventilation shaft and the distance is equal to a preset first distance, reducing an air door opening of air exhaust air door of an air conditioning system in the train; and when the train leaves away from theventilation shaft and the distance is equal to a preset second distance, recovering the air door opening of the air exhaust air door. According to the control method for preventing pressure jump of the train passenger compartment in the long tunnel, it can be seen that the changing rate of air pressure in the passenger compartment of the train is reduced, and the eardrum comfort levels of passengers are enhanced.

The invention discloses a volatile communication structure for end furnace chambers of a carbon secondary roasting furnace. The structure comprises the carbon secondary roasting furnace; both ends of the carbon secondary roasting furnace are provided with a volatile communication device; and ends of various bins of the end furnace chambers are provided with bin volatile passageways, and volatile passageway branch pipes used for connecting the volatile communication device and the bin volatile passageways. The structure has the advantages that the structure can make volatile produced in the bins of a downstream furnace chamber collected into the volatile communication device under the condition of basically same negative pressure and resistance. The condensation phenomenon of the volatile cannot appear in a pipeline, and the smoothness of the flow of the volatile is ensured during the operation across the central line of the furnace. The temperature of the furnace chambers and the bins in a flame system has even distribution, which is favorable for improving the quality of secondary roasting. The structure effectively avoids the pressure jump in the related bins, and is favorable for guaranteeing the personal safety of operation personnel.

The invention belongs to the technology of a fluid transmission connector in the field of electronic liquid heat dissipation, and relates to a quick coupling male component capable of automatically relieving pressure. The quick coupling male component comprises a connecting nut, a male disk shell II, an O-shaped rubber ring I, a male disk shell I and an O-shaped rubber ring II. The quick couplingmale component is characterized by also comprising a cylinder spring I, a sealing rod, a cylinder spring II, a snap spring and a sealing block. When the inner pressure of the quick coupling is lower than a designed pressure relief value, the sealing rod and the sealing block are integrated and reach an effect of sealing. When the inner pressure of the quick coupling reaches the designed pressure relief value, the sealing rod is separated from the sealing block and protrudes forwards to realize a function of automatic pressure relief. By using the fluid connector capable of automatically relieving pressure, the automatically relieving pressure can improve the safety of a liquid cooling system, greatly reduces the phenomenon that a module is broken and damaged due to pressure jump or temperature change, further improves the stability and reliability of the system, and reduces financial loss.

The invention discloses an associated gas treatment plant section plug-flow collecting system and method. The system comprises a gas-liquid-solid separating pipeline system, a double-regulating-valvepressure compensating system, a gas-liquid separating system and a pressure-flow detecting system. The invention discloses a coping strategy and a solution for a large-range plug-flow problem, causedby pressure fluctuations under a low-pressure operation condition, of an associated pipeline. Upstream and downstream pressure jump monitoring and regulating valve control are performed through the double-regulating-valve system and the pressure monitoring system, so that restrain on large-scale section plug-flow is realized; and a diameter-expanding pipeline and a gas-liquid separator are reasonably arranged to perform small-scale section plug-flow collection, so that a large-scale section plug-flow collecting device is prevented from being directly arranged, and stable effect is also achieved for production.

The invention discloses an electric control system of a coconut sheller. The electric automatic control system comprises two parts including a main circuit and a control circuit, wherein the main circuit comprises elements, such as an air switch, an AC contactor, a thermal relay and a motor, and the control circuit comprises the elements, such as a programmable controller, an analog-to-digital conversion module, a photoelectric switch, change-over switch and a pressure sensor. In the electric control system, the photoelectric switch for detecting existence of a coconut is used as a starting signal of an automatic shelling process, depth of inserting into the coconut of a blade is detected through the pressure sensor, a pressure jump signal generated when the blade pricks a wooden shell ofthe coconut is taking as starting of shelling, so, the electric control system is more accurate and reliable than the conventional observation by naked eyes. The electric control system provided by the invention has the beneficial effects of changing artificial operations of a shelling work into automatic operations, realizing automation of such production process and laying a foundation for realizing total automation of coconut processing enterprises.

The invention discloses a function detecting method and device for a dual-pump clutch. The method includes reversing pressure detection and reversing time detection of a reversing valve, wherein reversing pressure detection includes the steps that a mechanical pump and an electric pump are started; pressure of a main solenoid valve is adjusted into the range of 8-12 bar, and the changing rate is 0.1 bar/s; and a pressure value of the reversing valve during the period of adjusting the pressure of the main solenoid valve is obtained, and a pressure jump value, namely a reversing pressure value,is obtained. Reversing time detection includes the steps that the mechanical pump and the electric pump are started; pressure of the main solenoid valve is adjusted into the range of 8-12 bar, and thechanging rate is 0.1 bar/s; and a pressure value of the reversing valve and a pressure value of a main pressure slide valve during the period of adjusting the pressure of the main solenoid valve areobtained, the time when the jump value of the pressure value of the reversing valve appears and the time when a jump value of the pressure value of the main pressure slide valve appears are obtained,and the time difference of the former obtained time is reversing time. The function detecting method and device for the dual-pump clutch can detect multiple functions.

The invention provides a plug-in type two-stage proportional velocity regulating valve based on a pressure rising rate detector. The proportional velocity regulating valve detects change of an inlet pressure or an outlet pressure of a main valve in real time by means of the pressure rising rate detector and controls the pressure of a control cavity of the main valve and reduces the flow overshootof the main valve by changing the opening of the valve port of the pressure rising rate detector. The plug-in type two-stage proportional velocity regulating valve based on the pressure rising rate detector disclosed by the invention has the advantages of detecting pressure jump rapidly, regulating the flow overshoot induced by pressure jump quickly and improving the equal flow characteristic of the proportional velocity regulating valve and improving the dynamic property of the proportional velocity regulating valve by combining a digital flow compensator.

The invention discloses a power generation device for an energy-regenerative shock absorber. The power generation device is composed of a hydraulic system and a power generation system, wherein one end of a first high-pressure oil pipe of the hydraulic system is connected with an upper oil chamber of the energy-regenerative shock absorber, and one end of a second high-pressure oil pipe of the hydraulic system is connected with a lower oil chamber of the energy-regenerative shock absorber, so that the cyclic pressure oil flow power generation can be realized; a gas chamber of an oil-gas separation pressure balance type energy storage device of the hydraulic system is communicated with a gas bag at the bottom part of a cylinder barrel, so that the gas bag is timely elastically deformed, and the size of the gas bag is increased or reduced, therefore the problem of unequal volume change of an upper chamber and a lower chamber of the cylinder barrel under the condition that a piston slides is solved; a control device of the power generation device properly delays the start time of related electromagnetic check valves according to pressure jump feedback acquired by a first pressure sensor and a second pressure sensor, so that the damping stiffness of a shock absorber can be self-adaptively adjusted along with road condition changes, and the frequency and amplitude of vibration between a vehicle frame and a vehicle axle are reduced, therefore the vehicle frame is effectively prevented from being damaged.

The invention discloses a novel fluid damping device capable of coping with pressure jump. The novel fluid damping device comprises a hollow box body and a damping part, wherein the hollow box body isvertically placed, is in the shape of an inverted circular truncated cone, is coaxially provided with a pipeline outlet and a pipeline inlet at upper and lower ends as well as a connecting part for connecting a gas outlet pipeline to a gas inlet pipeline; the damping part is freely placed in the box body; when the damping part rises to be in contact with the pipeline outlet, close fit degree between the upper end of the damping part and the pipeline outlet is 30%-40%; and when the damping part drops to be in contact with the pipeline inlet, close fit degree between the lower end of the damping part and the pipeline inlet is 95%-100%. The novel fluid damping device is simple in structure, can retard pressure jump, effectively prevents backflow, is high in sensitivity, balances a device temperature, prevents an ice blockage phenomenon generated due to the fact that the temperature is too low, can reduce operation cost of enterprises, and improves benefits.