3290 results about "Choke valve" patented technology

The invention discloses a hydraulic system throttling control method based on a hydraulic control one-way valve, which relates to the technical field of throttling control, and comprises the following steps of: in an initialization stage of starting a hydraulic system, setting an optimal initial throttling opening for a throttling valve based on flow data of current oil; the method comprises the following steps: performing high-frequency real-time acquisition on flow state data of oil through a sensor deployed at the upstream of a throttling area, and establishing a set of flow state data system based on a time sequence; continuously collected flow state data are divided according to time windows, and an analysis set of oil flow data is constructed. According to the method, the dynamic flowing state of oil is monitored and deeply analyzed in real time, the load state is intelligently predicted in combination with a support vector machine model, and the opening degree of the throttling valve is adjusted in real time; the problems that in the prior art, response of a throttling control strategy to a high-load working condition is delayed, and oil temperature rise and viscosity abnormal reduction are caused by serious local pressure loss of a throttling area are effectively solved.

Embodiments include a choke system that passes enlarged debris despite having a relatively small diameter for an input port of the choke system. Embodiments also include systems to prevent dislodging of a choke seat when backpressure is supplied to the choke system. Embodiments also include sealing systems to prevent fluid leaks around the choke seat of the choke system.

The invention provides a compressed air water pumping and energy storage system which comprises an air compression set, a first heat exchanger, a second heat exchanger, an energy storage device, a third heat exchanger, a fourth heat exchanger, a turbine unit, a water pump unit, a normal-pressure water storage tank, a water wheel set, a water-gas co-containing cabin and a high-pressure air storage tank. A first throttling valve is arranged between the high-pressure gas storage tank and the water-gas co-containing cabin, and the water pump set, the normal-pressure water storage tank, the water wheel set, the water-gas co-containing cabin and the high-pressure gas storage tank are sequentially connected to form a first energy storage stage. The compressed air water pumping energy storage system is adopted, the characteristics of compressed air energy storage are combined, air is compressed and stored in a high-pressure air storage tank in the energy storage process, in the energy release process, high-pressure air is released, water in a water storage tank is compressed to be in a high-pressure state, and high-pressure water pushes a water turbine to do work for power generation.

A cage-type dual wedge throttle valve, comprising: a housing having an inner cavity; a valve cover arranged at the top of the housing; a valve seat arranged in the inner cavity, wherein the valve seat comprises an outer valve seat and an inner valve seat, and a plurality of flow holes are distributed on the peripheral wall of the outer valve seat; a valve core, which comprises two wedge-shaped surfaces and two cylindrical surfaces which are axially symmetrically arranged about the central axis, wherein the cylindrical surfaces face the direction in which a fluid flows into the inner cavity, and the cylindrical surfaces can fit the inner wall of the inner valve seat; and a valve stem having the two ends respectively connected to a driving device and the valve core, wherein under the driving of the driving device, the valve stem can drive the valve core to reciprocate in the valve seat in the axial extension direction of the valve stem. By means of the above solution, primary throttling is achieved when a fluid passes through the outer valve seat, and secondary throttling is achieved as the valve core gradually extends into the inner valve seat; moreover, the valve core comprises wedge-shaped surfaces, and a long throttling stroke is formed, thereby improving the throttling switching performance of the throttle valve; the symmetrical arrangement of the two wedge-shaped surfaces can balance the pressure on the two sides, thereby improving the stability of the valve core under force.

The invention discloses a control method of a flap unloading platform, which is applied to a hydraulic control system of the flap unloading platform, and comprises the following steps: acquiring a starting signal, and enabling a power driving branch based on the starting signal; the system pressure of a hydraulic control system of the turning plate unloading platform is controlled by the power driving branch to be gradually increased; in response to the fact that the system pressure is equal to the preset value, the power-on state of the main electromagnetic valve is changed, the first proportional throttle valve and the second proportional throttle valve are adjusted based on the second working state of the main electromagnetic valve, the first lifting oil cylinder and the second lifting oil cylinder are controlled to act, and the turning plate unloading platform is driven to rotate; and in response to rotation of the flap unloading platform to the preset angle, the power-on state of the main electromagnetic valve is changed, so that the flap unloading platform is controlled to stop rotating based on the first working state of the main electromagnetic valve. By controlling the first proportional throttle valve and the second proportional throttle valve which are independent, independent control over the first lifting oil cylinder and the second lifting oil cylinder is achieved so that synchronous action can be achieved.

The invention provides a method for simulating bypass ratio regulation and control under the complete machine condition of a turbofan engine, and the method is realized based on a double-shaft compressor tester, and belongs to the field of aero-engine tests.The method comprises the steps that control parameters under the complete machine state are determined; determining the control precision of the test state control parameters of the double-shaft compressor tester; constructing a control module which stores an adjusting rule in a whole machine state and is used for enabling the rotating speed of the fan and the rotating speed of the high-pressure compressor to be in a linkage mode in the test process; the fan pressure ratio is monitored, an outer culvert throttling valve is adjusted, then an inner culvert throttling valve is adjusted, the high-pressure compressor pressure ratio is monitored at the same time, and finally the inner culvert throttling valve and the outer culvert throttling valve are adjusted at the same time, so that the high-pressure compressor pressure ratio and the fan pressure ratio meet the requirements; the state of the double-shaft compressor tester is kept stable, and compressor parameters are collected through an inner and outer culvert exhaust collection device; the rotating speed of the high-pressure compressor or the rotating speed of the fan is adjusted according to the rotating speed difference of the fan and the high-pressure compressor in the complete machine state, and parameters of the compressor are collected after stabilization.

The invention provides a water working medium quasi-saturated compression high-temperature heat pump system based on an ejector, and belongs to the field of compression heat pumps. The problems that after an existing compression system flows through a throttling valve, the superheat degree of steam exhaust is large due to high-temperature lift compression, and the loss of available energy in the throttling process from condensate to a two-phase region is too large are solved. A multi-stage spraying atomization structure is adopted, a micro-nano liquid drop mist flow with the particle size controllable to be 50-200 nm and the liquid mass fraction adjustable to be 5%-10% is formed before compression, the airflow humidity regulation and control precision is remarkably improved, the quasi-saturation compression process is matched, and the thermal matching performance and the energy efficiency level of a system are effectively improved; a main flow inlet of the jet atomizer is changed into a compressor outlet from a condenser outlet, so that the response speed is increased, and meanwhile the jet atomizer is suitable for a complex variable-working-condition system; or single-stage compression is optimized into a two-stage compression form, so that higher heating temperature and more stable system operation are realized; or liquid from a lower-pressure position is injected, so that the injection capacity is improved.

The utility model discloses a throttle valve and water purification equipment, the throttle valve comprises a valve body, a driving assembly, a throttle element and a diaphragm assembly, a valve cavity is formed in the valve body, and a mounting seat is arranged in the valve body; the driving assembly comprises a valve element seat and a valve element, the valve element seat is connected to the valve body, and the valve element is located in the valve element seat; the throttling element is arranged in the valve cavity, the throttling element and the installation base are matched in a sealed mode to divide the valve cavity into a high-pressure cavity and a low-pressure cavity, and when the throttling valve is in a throttling mode, the valve element abuts against the diaphragm assembly on the two protruding ribs and the sealing rib. According to the technical scheme, the two protruding ribs and the sealing rib are arranged on the throttling piece, the throttling channels are formed when the diaphragm assembly abuts against the two protruding ribs, the supporting rib is arranged between the throttling channels in a protruding mode, and therefore the diaphragm assembly is supported, the diaphragm assembly is prevented from being excessively deformed to extrude the throttling channels, and the service life of the diaphragm assembly is prolonged. Therefore, the pre-membrane pressure of the reverse osmosis membrane is improved, and the service life of the water purification equipment is prolonged.

A novel external electromagnetic valve assembly of a shock absorber comprises an electromagnetic assembly and a valve body assembly, a guide-in valve sub assembly of the valve body assembly adjusts flow through a throttling valve piece, then adjustment of damping bandwidth is achieved, and the electromagnetic assembly is matched with a pilot hole and a damping hole of a main valve element of the valve body assembly through an electromagnetically-driven conical rod. The damping force can be stably established, the concept is novel, the design is ingenious, the stable damping force can be rapidly provided, and the effect is remarkable.

The invention relates to a micro-spraying system irrigation uniformity control method and system, and belongs to the technical field of agricultural irrigation energy saving. Calculating the flow data of each nozzle according to the data of the flow meters of the branch pipes; calculating the pressure distribution of each node under the condition of no throttle valve by using the irrigation area pipe network hydraulic model, and finding out the part with too high or too low pressure in the pipe network; a throttle valve is installed on a main pipe of a pipe network in an irrigation area, and the opening degree of the throttle valve is adjusted and the pressure rise of a water pump is calculated by taking the most disadvantageous spray head in the pipe network as a pressure reference; the flow condition in the pipe network is monitored in real time through the flow meter, and data are uploaded; the pressure is calculated through the pipe network hydraulic model, when the water pressure in the pipe network is abnormal, the throttling valve needing to be adjusted and the opening degree are calculated, workers are informed, and early warning is conducted in time. The service life of the system is prolonged, and the irrigation efficiency and the water resource utilization rate are improved.

A needle for a choke valve assembly includes a base portion formed from a first non-superhard material and a tip portion formed from a superhard material. The needle also includes a brazed connection coupling the tip portion to the base portion. The brazed connection includes an insert formed from a second non-superhard material, in which the second non-superhard material is harder than the first non-superhard material and softer than the superhard material. In addition, the brazed connection includes a shim disposed between the insert and the base portion, a first layer of brazing material disposed between the base portion and the shim, and a second layer of brazing material disposed between the shim and the insert.

The invention discloses a compact rigidity damping inerter self-control type hydro-pneumatic spring and a working method. The bottom of the lower end of a plunger of a hollow structure is sealed, is downwards connected with a wheel and extends into an oil cylinder from bottom to top, the top of the upper end of the plunger is fixedly connected with a piston, and a row of plunger holes are formed in the upper portion of the plunger; the upper part of an upper cavity of the oil cylinder is sequentially connected with a damper and a small oil-gas chamber; the lower part of a lower cavity is sequentially connected with an inerter pipe, an adjustable throttle valve and a large oil-gas chamber; the upper end of the self-control device outer cylinder is fixedly connected with the piston; a self-control device inner barrel capable of moving up and down is coaxially sleeved in the self-control device outer barrel, the lower end of the self-control device inner barrel is sealed, and the upper section of the self-control device inner barrel is hinged to the oil cylinder upper end cover; an inner barrel upper row oil through hole formed in an inner barrel of the automatic control device is always located in an upper cavity of the oil cylinder, the upper edge of an inner barrel middle row oil through hole is aligned with the upper edge of an outer barrel upper row oil through hole, and the lower edge of an inner barrel lower row oil through hole is aligned with the lower edge of an outer barrel lower row oil through hole. The rigidity is changed, and the damping and the inerter can also be changed.

The invention discloses a load simulation loading system based on an engineering mechanical power system and a control method thereof, and relates to the technical field of mechanical power system simulation. The load simulation loading system comprises an engineering machinery power system, a load loading system, a whole vehicle control unit and an upper computer platform. The engineering machinery power system comprises a first oil tank, a main pump, a pilot pump, a pilot control handle, a signal control valve and a multi-way valve. The load loading system comprises a three-position four-way reversing valve, a proportional overflow valve, a first proportional throttle valve, a second proportional throttle valve, an electromagnetic valve, a third proportional throttle valve and a variable pump, wherein the three-position four-way reversing valve, the proportional overflow valve and the first proportional throttle valve are connected to the multi-way valve, the second proportional throttle valve and the electromagnetic valve are connected to an outlet of the proportional overflow valve, and the third proportional throttle valve is connected between the second proportional throttle valve and the second oil tank. And the three-position four-way reversing valve is constructed to enable an inlet of the proportional overflow valve to be communicated with one of the oil port A and the oil port B of the multi-way valve in a switching manner, and an outlet of the proportional overflow valve to be communicated with the other one of the oil port A and the oil port B in a switching manner.

The invention discloses a rigidity self-control type two-stage vibration reduction hydro-pneumatic suspension with four inertial elements and a working method. The rod end of a plunger rod in an oil cylinder downwards extends out of the oil cylinder and is fixedly connected with a wheel through a third connecting device and a lower connecting device in sequence; the oil cylinder is sequentially connected with an inerter pipe, an adjustable throttling valve, a damper and a small oil gas chamber through a first oil pipe, and a pipeline between the adjustable throttling valve and the damper is sequentially connected with a rigidity control valve, a normally-open first electromagnetic valve and a large oil gas chamber through a second oil pipe. A closed second electromagnetic valve and a hydraulic pump station are sequentially connected to a pipeline between the normally open first electromagnetic valve and the large oil gas chamber through a third oil pipe; a valve body of the rigidity control valve is fixedly connected with a vehicle body through a valve body clamping device, and a suspension controller is connected with a height sensor and further connected with an adjustable throttling valve, a normally-open first electromagnetic valve, a normally-closed second electromagnetic valve and a hydraulic pump station. Small rigidity is automatically provided when the suspension is located near the balance position, and large rigidity and large damping are automatically provided when the suspension is away from the balance position.

A thermal management system and a vehicle. The heat management system comprises a first refrigerant loop for switching the flow direction through a reversing valve. The reversing valve comprises a first connector, a second connector, a third connector and a fourth connector. And in the first flow direction mode, the first connector communicates with the third connector, the second connector communicates with the fourth connector, and a refrigerant of the first refrigerant loop flows back to the compressor from an outlet of the compressor sequentially through the first connector, the third connector, the second refrigerant flow channel, the first throttling valve, the first refrigerant flow channel, the second connector and the fourth connector. And in the second flow direction mode, the first connector communicates with the second connector, the third connector communicates with the fourth connector, and the refrigerant of the first refrigerant loop sequentially passes through the first connector, the second connector, the first refrigerant flow channel, the first throttling valve, the second refrigerant flow channel, the third connector and the fourth connector from the outlet of the compressor to flow back to the compressor. The first refrigerant loop is used for exchanging heat with a cooling liquid loop in the vehicle. According to the scheme, the pipeline complexity of the thermal management system can be reduced.

The invention relates to the technical field of hydraulic pressure, and discloses an oil cylinder for an oil press, a hydraulic system of the oil cylinder and a pressurizing method, a protection frame is additionally arranged outside the oil cylinder, vibration under the working condition of high-speed movement or extreme pressure can be reduced, and the oil cylinder is prevented from being damaged or deformed; the multi-pump system transmits hydraulic oil of a hydraulic oil tank to the lifting module through an oil supply pipeline, the lifting module conducts overflow pressure stabilization on the hydraulic oil and then transmits the hydraulic oil to the station oil cylinder, and therefore the station oil cylinder stretches out and draws back to adjust the position of the oil press. The multi-pump system transmits hydraulic oil of a hydraulic oil tank to an energy accumulator for pressurization through a pressurization pipeline, pressure regulation is conducted through a pressure regulation one-way throttle valve, then pressure stabilization is conducted through a pressure regulation piezoelectric hydraulic reversing valve and a pressure regulation hydraulic control one-way valve, and finally the hydraulic oil flows into a light-pressure station oil cylinder or a heavy-pressure station oil cylinder through the pressurization pipeline. Therefore, the hydraulic pressure output of the oil press is improved, the same oil press can process various different work tasks, and the universality and adaptability of equipment are improved.

The invention discloses a throttling well killing manifold with a pressure adjusting function for offshore oil exploitation, and relates to the technical field of well killing manifolds, the throttling well killing manifold comprises a base, a four-way structure, a filtering device, a throttling device, an external connecting pipe, a liquid injection structure and a vibration reduction support, and the size of filtering holes of a filtering plate can be dynamically adjusted according to the content of gravel in oil gas; when the content of the gravel is high, the size of the filter holes is shrunk so as to achieve a finer filtering effect, and when the content of the gravel is low, the size of the filter holes is increased, the throughput of fluid is improved, pressure loss caused by increase of filter resistance is reduced, the service life of the filter screen is prolonged, and the throttling device can automatically adjust the opening degree of a throttling valve according to the pressure in a pipeline. When the pressure in the pipeline is sharply increased due to abnormal conditions, the throttle valve can be automatically closed to cut off a fluid channel of the pipeline, and meanwhile, the pressure relief device is started to release part of overhigh pressure, so that the pressure in the pipeline rapidly falls back to a safe range.

The invention discloses an anti-erosion throttling valve, and relates to the technical field of throttling valves, the anti-erosion throttling valve comprises an L-shaped valve body, a first space, a second space and a third space are arranged in the valve body, the first space, the second space and the third space are sequentially communicated and distributed, the first space and the second space are horizontal, and the third space is vertical; the valve seat is arranged at the joint of the first space and the second space; the valve element is located on the side, close to the first space, of the valve seat; one end of the valve rod is connected with the valve element, and the other end of the valve rod extends out of the valve body and is driven by a driving device; the connecting seat is semi-embedded into the first space of the valve body and used for being connected with an external pipe body, and a spring is further arranged between the connecting seat and the valve element; wherein the spring is contained in the sleeve assembly, the sleeve assembly is arranged in the first space so that the valve element can be contained, by arranging the sleeve assembly, the service life of the valve element is effectively prolonged, and the maintenance cost is reduced.

The utility model provides an open-loop controlled multifunctional hydraulic pulse test bench, which comprises a storage oil tank, an oil supply pump machine, a reversing valve, a pressurizing oil cylinder and an oil supplementing overflow valve, according to the test bed, a large amount of oil flows into a system at the moment that an oil way is opened by a reversing valve, and due to the fact that an overflow valve has a lag phenomenon in response, oil pressure instantaneously generates an overshoot peak value, pressure in a pipeline rapidly rises and a pressure peak appears, then the overflow valve is conducted, the oil is guided out along the overflow valve, and the pressure in the system is reduced to the set pressure of the overflow valve; water hammer waves and rectangular waves of various waveforms and frequency bands can be generated by adjusting the diameter of a variable damping hole of the one-way throttle valve and the rotating speed of the motor, so that the hydraulic pulse test bed can form hydraulic pulse waveforms of various waveforms and frequency bands; the set pressure of the overflow valve is increased, meanwhile, the travel switch loses efficacy, and when the reversing valve is located at the right position all the time, a damage test can be conducted on the hydraulic pipeline to measure the maximum pressure value capable of being borne by a tested piece.

The invention discloses underwater throttle valve element lowering and recycling equipment and a using method, and relates to the technical field of underwater oil extraction, the underwater throttle valve element lowering and recycling equipment comprises a guide protective cover, an ROV connector, a mounting plate, a lifting mechanism, a hanging ring, a butt joint assembly, an insertion cylinder and a locking assembly, and the guide protective cover is mounted on a valve body; the ROV interface is mounted at the top of the valve core; the lifting mechanism is mounted on the top surface of the mounting plate, and the telescopic end of the lifting mechanism extends downwards and penetrates through the mounting plate; the lifting ring is fixedly connected to the top end of the fixed end of the lifting mechanism so as to be connected with lifting equipment. The butt joint assembly is mounted below the mounting plate; the insertion cylinder is fixedly connected with the lifting end of the lifting mechanism, and the angle of the mounting plate can be adjusted under the guidance of the guide shield, so that the butt joint assembly is inserted into the ROV interface; the locking assembly is installed on the installation plate and can enable the butt joint assembly inserted into the ROV connector to be locked with or disengaged from the ROV connector, the structure is simple, use is convenient, and lowering and recycling work of the underwater throttle valve element can be efficiently and accurately completed.

A two-stage gas generator for ejection comprises a barrel, a first gas generation assembly and a second gas generation assembly. The first gas generation assembly comprises a first igniter, a first rupture disk and a throttling valve. The second gas generation assembly comprises a second igniter and a second rupture disk. The first igniter comprises an electric detonator I which is used for blasting the first rupture disk to enable high-pressure inert gas in the barrel body to sequentially flow through a third gas guide hole in the throttling valve, the position of the first rupture disk and a first gas guide hole in the first igniter to enter a working chamber in the launching barrel; the second igniter comprises a second electric detonator which is used for blasting the second rupture disk to be matched with the first igniter so that the remaining high-pressure inert gas in the barrel can enter the working cavity in the launching barrel through the position of the second rupture disk and a second gas guide hole in the second igniter. The device can meet the initial low overload requirement of a launched object in the takeoff stage and the cylinder outlet speed requirement in the middle and later periods, is simple in structure and light in weight, and a generated pushing air source is clean and free of residues and cannot expose a launching point.

The present invention relates to the field of valve technology, and in particular to a two-way throttle valve and an air conditioning system having the same. The two-way throttle valve includes a valve tube, a first valve core and an inner wall of a first valve port cooperate to form a first flow channel; a second valve core and an inner wall of the second valve port cooperate to form a second flow channel; when the first valve port and the second valve port are opened, the flow area of ​​the first flow channel is greater than the flow area of ​​the second flow channel, and the second valve core cooperates with the second valve port to achieve throttling. The present invention also provides an air conditioning system, which includes the above-mentioned two-way throttle valve. Compared with the prior art, the advantage of the present invention is that when the first valve port and the second valve port are opened, the flow area of ​​the first flow channel is greater than the flow area of ​​the second flow channel, thereby increasing the flow volume, so as to realize the two-way flow and one-way throttling function of the two-way throttle valve, and also to meet the requirements of low pressure and large flow under the defrosting condition.

The invention belongs to the technical field of automobile air suspension systems, and particularly relates to a drying mechanism of an air compression pump with a good dehumidification effect. A first molecular sieve is arranged in the first mounting space of the shell, and a second molecular sieve is arranged in the second mounting space of the shell; an air channel for communicating the first mounting space with the second mounting space is arranged in the shell; the shell is provided with a first air nozzle communicated with the air channel, and a throttling valve is installed at the first air nozzle. The shell is provided with a second air nozzle communicated with the first mounting space and a third air nozzle communicated with the second mounting space; the second air tap and the third air tap are both used for being connected with a compressed air outlet of an air compression pump; when the compressed air is dehumidified, the second air nozzle and the third air nozzle are used as air inlet nozzles, and the first air nozzle is used as an air outlet nozzle; when the first molecular sieve and the second molecular sieve are subjected to back flushing and moisture removal, the second air nozzle and the third air nozzle serve as air outlet nozzles, and the first air nozzle serves as an air inlet nozzle.

The invention discloses an integrated rigidity damping inerter self-control type two-stage vibration reduction hydro-pneumatic suspension and a working method in the field of automobiles, a hollow plunger extends into an upper cavity of an oil cylinder, the lower end of the hollow plunger is fixedly connected with a piston, and an upper lifting lug runner is sequentially connected with an inerter pipe, an electric control throttle valve and a large hydro-pneumatic chamber through a first hydraulic oil pipe; a lower lifting lug runner is sequentially connected with a damper and a small oil gas chamber through a second hydraulic oil pipe, a built-in rigidity control valve outer cylinder with the lower end fixedly connected with a piston is arranged in the plunger, an inner cylinder with the upper end sealed and the lower end connected with the lower lifting lug through a spherical hinge is coaxially sleeved with the outer cylinder, and three rows of holes are formed in the side wall of the inner cylinder from bottom to top. Two rows of holes are formed in the side wall of the outer cylinder from bottom to top; the flow direction of oil liquid is changed when the suspension works, a seal does not need to be arranged on a piston, a longer oil through hole is formed in an outer barrel, the safety of the control valve is improved, a wheel dynamic vibration absorber is integrated to an oil cylinder, integration is achieved, an external rigidity control valve is replaced with an internal rigidity control valve, and the size of the whole suspension is reduced.

To early activate a catalyst of a three-way catalyst device for purifying exhaust gas of an internal combustion engine, in a power device including the internal combustion engine using ammonia and ignition fuel as fuel.SOLUTION: A power plant 10 comprises a turbocharger 26 that turbocharges intake air of an internal combustion engine 12 to increase an intake pressure, and a throttle valve 24 that narrows a flow path of an intake pipe 22. When a catalyst in a three-way catalytic device 44 is inactive, a wastegate valve 50 of the turbocharger 26 is opened, or in addition, an intake flow path is narrowed by the throttle valve 24, to lower the intake pressure compared to that in normal time. The lowering of the intake pressure reduces a heat capacity of materials in a cylinder, increases a combustion temperature, and increases an exhaust temperature. High-temperature exhaust gas increases a temperature of the catalyst early, to accelerate activation.SELECTED DRAWING: Figure 1

The invention relates to a natural gas liquefaction process using supersonic velocity spray pipe precooling. The system comprises a pre-cooling unit, a deep cooling unit, a heat exchange unit and a natural gas liquefaction unit. The pre-cooling unit comprises a supersonic spray pipe and a throttle valve; the cryogenic unit comprises a throttle valve, a compressor, a cooler, a component distributor and a mixer; the heat exchange unit comprises a heat exchanger; the natural gas liquefaction unit comprises a throttle valve and a separator. According to the production process, the technical scheme of supersonic spray pipe precooling and mixed refrigerant circulating cryogenic cooling is adopted. Compared with other processes, the process has the advantages of low refrigerant consumption, low energy consumption, high natural gas liquefaction rate, low process complexity, low equipment investment, good environmental protection benefit and the like under the same condition, and can efficiently recover the natural gas condensate (NGL) while precooling.

The invention provides an ammonia flash steam reliquefaction system for realizing cold energy supply, the reliquefaction system comprises an ammonia fuel cabin, an ammonia gas storage tank, a compressor, a condenser pipe, a cooling tank and other devices which are connected in sequence, ammonia gas flowing out of the ammonia fuel cabin is converted into high-pressure liquid ammonia after being compressed and condensed, and the high-pressure liquid ammonia is divided into three branches after flowing out through a cold heat exchanger, the first branch flows into the cooling tank after being depressurized and cooled by the high-pressure throttle valve, so that the interior of the cooling tank is cooled; the second branch is depressurized and cooled by a refrigeration storage throttle valve and then enters a liquid ammonia evaporator in the refrigeration storage, so that the refrigeration storage is cooled; and the third branch flows back to the ammonia fuel cabin after being depressurized and cooled by a back-to-cabin throttle valve. And meanwhile, the liquid ammonia in the cooling tank is also used for cooling the refrigerant water, so that the refrigeration of a user room is realized. According to the reliquefaction system, cold energy contained in high-pressure liquid ammonia in the reliquefaction process is fully utilized, different refrigeration schemes are made according to the refrigeration house and the user room, and the whole pipeline design is more reasonable.

The invention relates to the technical field of throttle valve machining, and discloses a throttle valve inclined hole machining device which comprises a workbench, a motor is fixedly connected to the left side of the workbench, a storage frame is rotatably connected to the bottom of the workbench, an inner rod is rotatably connected to the inner wall of the workbench, and a rotating mechanism is arranged at the top of the workbench. And an auxiliary mechanism is arranged at the bottom of the workbench, and the rotating mechanism comprises a reciprocating lead screw, a bottom sliding block, a round rotating rod, an auxiliary rotating block and an arc-shaped frame, so that an inclined hole for installing a throttling valve can be rapidly machined, and in order to meet the requirement of multi-angle machining, under the action of arc-shaped teeth and moving wheels, the machining efficiency is improved. And in the angle adjusting process, the whole machining equipment can be rotated under the action of a round rotating rod and an auxiliary rotating block.

The invention relates to the technical field of low-grade heat utilization, in particular to a jet boosting organic Rankine cycle combined cooling and power generation system and a jet boosting organic Rankine cycle combined cooling and power generation method. The system comprises a generator, a condenser, a working medium pump, a supersonic vapor-liquid two-phase flow ejector, a first evaporator, an expansion machine, a generator, a first throttling valve, a second evaporator, an absorber, a solution pump, a solution heat exchanger and a second throttling valve which are sequentially connected to form a loop. The organic Rankine cycle and the absorption refrigeration cycle are coupled to reduce the pressure of an outlet of an expansion machine, meanwhile, the supersonic vapor-liquid two-phase flow ejector is used for assisting in boosting to save part of consumed power of a power generation side working medium pump, and heat energy of part of superheated steam at an outlet of an absorption refrigeration subsystem generator is recycled; cogeneration is achieved while the heat efficiency is improved, and high technical economy is achieved.

The invention discloses a throttling well killing control method and system, a storage medium and a program product, and relates to the field of intelligent control. According to the application, the control system collects wellhead pressure, casing pressure, throttle valve opening and shaft temperature gradient data; comparing the shaft temperature gradient data with a preset temperature reference curve to obtain a temperature deviation sequence, and performing Fourier decomposition on the temperature deviation sequence to obtain a main frequency component; on the basis of the main frequency component and a preset frequency threshold value, downhole flow situation parameters are determined, and a pressure dynamic compensation function is established according to the downhole flow situation parameters; the wellhead pressure and the casing pressure are input into the pressure dynamic compensation function, and the corrected wellhead pressure and the corrected casing pressure are obtained; and on the basis of the corrected wellhead pressure, the corrected casing pressure and the throttle valve opening, the throttle valve opening adjusting amount is calculated, the throttle valve is controlled to be adjusted according to the throttle valve opening adjusting amount, and therefore the reliability and accuracy of throttle well killing control are improved.