1379 results about "Choke valve" patented technology

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.

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.

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.

The present disclosure provides embodiments of a monobore assembly to be positioned in a hydraulic fracturing manifold system to provide overpressure relief and bleed using choke valves. The monobore assembly includes a control module, a pressure relief choke valve, a pressure transducer, and a bleed choke valve. The control module has a controller configured to receive a pressure signal, from the pressure transducer, and upon determination the pressure is above a predetermined threshold, send an output action to relieve the pressure in a throughbore of the monobore assembly. The pressure relief choke valve is configured to receive the output action and open in less than 0.4 seconds, thereby to prevent damage from overpressure within a throughbore of a first monobore junction. The bleed choke valve is also configured to receive the output action to controllably evacuate pressure, or pressurized fluid, within a throughbore of a second monobore junction.

The invention discloses a design method of a pressure control throttle valve with the pressure drop linearly changing along with the stroke, and belongs to the technical field of automation of oil and gas exploitation equipment.The design method comprises the following steps that the linear relation between the pressure drop and the stroke of the throttle valve serves as a target; a mathematical model of a valve element contour is established by establishing a minimum throttling area equation of a cylindrical valve and a wedge-shaped valve, correcting a flow pressure drop characteristic equation and deducing a differential pressure linear adjustment equation, a valve element contour curve meeting the linear requirement is deduced through variable-diameter contour optimization design, and therefore the valve element structure of the throttling valve is obtained. By means of the design method, the valve element contour curve with the wider linearity range of pressure control adjustment and the better precision can be obtained, and the design method is more efficient and universal.

The invention discloses a vacuum exhaust throttle valve setting method and system. The method comprises the steps that the current pressure value in a vacuum pipeline is obtained; calculating a pressure deviation and a pressure deviation change rate according to a preset target pressure value and the collected current pressure value; fuzzifying the calculated pressure deviation and the pressure deviation change rate to obtain a corresponding fuzzy linguistic variable; performing fuzzy reasoning based on a preset fuzzy rule base to obtain a valve opening adjustment amount in a fuzzy form; performing defuzzification processing on the valve opening adjustment amount in the fuzzy form to obtain an accurate valve opening adjustment amount value; and the opening degree of the exhaust throttle valve is adjusted according to the accurate valve opening degree adjustment amount value. The opening degree of the exhaust throttle valve is dynamically adjusted, and rapid and accurate control is achieved.

The utility model discloses a hydraulic logic control system for a sidesway distance adjusting fork. Comprising an oil pump, a safety valve, a first reversing valve plate, a logic control valve block, a first hydraulic control one-way valve, a first three-way pipe, a right pallet fork distance adjusting oil cylinder, a left pallet fork distance adjusting oil cylinder, a first overload valve, a second hydraulic control one-way valve, a second three-way pipe, a third three-way pipe, a third hydraulic control one-way valve, a throttling valve, a second reversing valve plate and a second overload valve. The logic control valve block comprises a second hydraulic control one-way valve, a third hydraulic control one-way valve, a throttling valve and a second overload valve, and the second hydraulic control one-way valve, the third hydraulic control one-way valve, the throttling valve and the second overload valve are communicated through pipelines. And the first reversing valve plate is communicated with the second reversing valve plate. According to the hydraulic logic control system for the laterally-moving distance adjusting fork, the purpose of hydraulic oil way regulation and control is achieved through the arrangement of the structure.

The utility model discloses a liquefied air energy storage system which comprises a molecular sieve water separator and a molecular sieve adsorption tower, a separator air output pipe is connected with a top gas connecting pipe of the molecular sieve adsorption tower, and a bottom gas connecting pipe of the molecular sieve adsorption tower is connected with a cold box front compressor unit. The cold box front compressor unit is communicated with an air pipeline in the cold box, and an outlet of the air pipeline in the cold box is communicated with a first liquefied air storage tank through a first liquefied air output pipe with a first throttling valve; the output end of a liquid air pressure pump on a first liquefied air storage tank output pipe of the first liquefied air storage tank is communicated with the air input end of the expansion unit, the air output end of the expansion unit is provided with a hot blowing conveying pipe and a cold blowing conveying pipe, and the hot blowing conveying pipe is communicated with a bottom gas connecting pipe through a first heater and an electric heater; and the output end of the cold blowing gas conveying pipe is connected to the output end of the electric heater output pipe. The device has the advantages of simple structure, low energy consumption and full utilization of heat energy.

The invention belongs to the technical field of alkane cracking processes, and provides an alkane raw material treatment device and method capable of efficiently recycling raw material cold energy, the alkane raw material treatment device comprises a gasification assembly, the gasification assembly comprises a throttle valve, the discharge end of the throttle valve is communicated with a cold end flow channel of a cold energy heat exchanger, and a hot end flow channel of the cold energy heat exchanger is circularly connected with a cold energy user; the gas-liquid separation assembly comprises a gas-liquid separation tank, a gas phase outlet of the gas-liquid separation tank is communicated with compression equipment, and a liquid phase outlet of the gas-liquid separation tank is communicated with a liquid alkane vaporizer; the raw material heating assembly comprises a raw material superheater, a feeding port of the raw material superheater is communicated with a discharging port of the compression equipment, and a discharging port of the raw material superheater is communicated with follow-up processing equipment. In the alkane gasification process, the alkane cooling capacity can be efficiently and stably recycled and utilized, and the purposes of reducing cost and improving efficiency can be achieved.

The invention discloses a method for regulating and controlling formation pressure in an offshore oilfield reinjection process based on environmental protection synergy, which relates to the technical field of oilfield production water reinjection, and comprises the following steps: collecting the reinjection displacement, reinjection pressure and operation time of a throttle valve, a Christmas tree channel and a reinjection fluid under the working condition of conveying to a formation along a water injection string; unified checking and working condition correlation analysis are carried out, and a reinjection basic operation parameter set is generated; and performing throttling valve and Christmas tree internal flow characteristic analysis on the reinjection basic operation parameter set to obtain equivalent throttling characteristic parameters, and correcting wellhead injection pressure according to the equivalent throttling characteristic parameters to obtain effective injection pressure. According to the method, a unified and continuous pressure correction basis is provided for determining the safety constraint boundary and screening the optimal combination of the reinjection pressure and the reinjection displacement, so that reinjection regulation and control are unified among efficiency, safety and stability.

The invention relates to a valve arrangement (1; 81; 91) with several functional modules arranged in series from the group: valve disc group (8), safety valve group (7), throttle valve (171), wherein the valve disc group (8) has one or more valve discs (101, 102), each with at least one electrically controllable valve (103, 104) which is connected to an electrical supply line (17) and to a fluid supply line (18), wherein the throttle valve (171) is arranged upstream of the safety valve group (7) between a fluid connection (36) and the fluid supply line (18) of the valve disc group (8), wherein the safety valve group (7) has two safety valves (51, 52) which are designed to influence a fluid flow between the fluid connection (36) and the fluid supply line (18),wherein the safety control (7) is designed for the safety-oriented blocking of electrical control signals for the safety valves (51, 52), wherein the throttle valve is designed for a temporary reduction of a working pressure in the fluid supply line (18), and wherein a valve control (5) is designed to control the valve disc group (8) and the safety valve group (7).

The utility model discloses a two-way throttle valve device for controlling a two-way hydraulic jar, which is characterized in that a valve body is axially provided with a drainage channel hole penetrating through two end surfaces of the valve body, the drainage channel hole comprises a valve needle hole in the middle, a valve needle is arranged in the valve needle hole, the valve needle hole consists of an upper striking valve needle hole and a lower striking valve needle hole, and the upper striking valve needle hole is communicated with the lower striking valve needle hole. The upper striking valve needle hole and the lower striking valve needle hole are different in hole diameter. According to the single-cavity two-way jar, the drainage channel hole penetrating through the two end faces is formed in the valve body and comprises the lower striking valve needle hole and the upper striking valve needle hole which are different in size, and only one valve needle is arranged in the valve needle hole, so that two-way throttling flow can be adjusted respectively, and control over different upper striking force and lower striking force of the single-cavity two-way jar is achieved. The bidirectional hydraulic jar is simple in structure, the single valve body has the bidirectional jar function of controlling the upward jar and the downward jar of the bidirectional hydraulic jar, the jar delay of the upward jar and the downward jar can be independently adjusted, the number of parts of the bidirectional hydraulic jar and the total length of tools are reduced, the manufacturing cost is reduced, and the bidirectional hydraulic jar is convenient to maintain.

The application provides a hydraulic pump fluid flow pulsation characteristic representation method based on digital twin technology, and relates to the technical field of fluid pressure measurement. First, a theoretical structure model of the measured hydraulic pump is established by using AMEsim simulation software; second, a pump source pressure pulsation test system of the measured hydraulic pump is built, a throttle valve is used to simulate load change, and a data acquisition system is used to collect pressure pulsation signals, temperature signals and average flow signals of the outlet fluid of the measured hydraulic pump; the collected signals are processed and used as input parameters of the theoretical structure model of the measured hydraulic pump; finally, the theoretical structure model of the measured hydraulic pump is simulated and calculated, the simulation model parameters are modified, the simulation obtained pressure pulsation curve is compared with the measured pressure pulsation curve, and the final parameters of the theoretical structure model parameters of the measured hydraulic pump are gradually determined. The application is simple to realize, convenient to operate, can meet the requirement of engineering precision, and greatly saves experimental cost and time cost.

The invention discloses a double-support rotary full-bore throttle valve and a station switching method. Through the core assembly composed of the actuator, the valve rod, the rotary valve element, the double-end bearing supports and the like, a stress model is optimized into a stable simply supported beam structure from a traditional cantilever beam structure, vibration caused by fluid impact is remarkably restrained, and the operation stability of the whole machine is enhanced. The rotary valve core is integrated with a variable-cross-section throttling molded surface, a large-diameter full-bore flow channel and a cut-off molded surface, so that the equipment not only can realize continuous adjustment of flow and pressure, but also can perform on-line blockage removal and pollution discharge by rotating and switching to a full-bore state under the condition of not closing an upstream valve and a downstream valve, and the maintenance process is greatly simplified. In addition, according to the design, the axial telescopic space is omitted through the rotary motion principle, a valve element sleeve protection structure is omitted through high stability, the equipment size and material consumption are effectively reduced, and the beneficial effects of being high in function integration degree, high in erosion resistance, long in service life and the like are achieved.

The invention discloses a high-pressure straight-through plunger type throttle valve, and particularly relates to the technical field of throttle valves, the high-pressure straight-through plunger type throttle valve comprises a valve body, a plunger rod, a limiting fixer and a through-flow seat, a straight-through flow channel is arranged in the valve body, a plunger rod mounting hole is further formed in the valve body, the plunger rod is rotatably mounted in the plunger rod mounting hole, and the plunger rod is rotatably mounted in the through-flow seat. A limiting fixator is detachably installed at the position, corresponding to the top end of the plunger rod, of the valve body, a channel hole is formed in the bottom end of the plunger rod, the through-flow base is detachably installed in the channel hole, and through opening sealing rings are arranged at the positions, corresponding to the inlet end and the outlet end of the through-flow base, of the outer surface of the plunger rod. The valve body is of a channel straight-through type structure, the energy consumption loss of equipment is reduced, the direction of a medium flow channel does not need to be changed, the occupied well site space is small, the layout problem is solved, meanwhile, additional equipment brought by an angle type fixed throttling valve is reduced, cost is reduced, and disassembly and assembly are more convenient.

The invention discloses a throttling valve with throttling opening controlled by an electric cylinder and a working method of the throttling valve, and relates to the technical field of pressure regulation of throttling valves. A pressing assembly for pressing a valve element downwards is arranged between a frame and a valve deck; pulling assemblies used for pulling down the valve element are arranged on the left side wall and the right side wall of the conveying pipe correspondingly, the pulling assembly located on the left side comprises a blind groove formed in the inner side wall of the conveying pipe and a nut fixedly arranged on the left side of the conveying pipe and opposite to the blind groove in the left-right direction, a pin shaft is fixedly arranged between the front wall and the rear wall of the blind groove, and an L-shaped force transmission block located in the blind groove is rotationally installed on the pin shaft; a screw is in threaded connection with the interior of the nut and extends into the blind groove, an arc-shaped end is fixedly arranged at the extending end of the screw, and the arc-shaped end and the long block of the L-shaped force transmission block are opposite in the left-right direction. The pressure regulating valve has the beneficial effects that the valve element moving in place can be prevented from continuously moving upwards, and the pressure regulating precision is higher.

The invention discloses a drainage flash heat supply system of a once-through boiler under low load and an operation method of the drainage flash heat supply system. The drainage flash heat supply system comprises a drainage flash control valve, a drainage flash tank, a heat supply steam throttle valve, an electric heater and a condensation drainage recirculation pump which are sequentially arranged behind a water storage tank. When a unit undertakes a peak regulation task and a boiler enters a wet state operation mode under an ultra-low load working condition, drain water generated by a steam-water separator is introduced into a flash evaporation heat supply system, generated high-pressure steam is used for industrial heat supply, the steam meets the requirements of pressure and superheat degree of industrial steam through a throttling valve and an electric heater, and the heat supply efficiency is improved. The drain water produced in the flash tank is re-introduced into the feed line through a condensed drain water recirculation pump. According to the system, power supply and heat supply can be decoupled during low-load operation of a unit, meanwhile, the stable combustion requirement of boiler operation is met, and the hydrodynamic safety of each water cooling wall is protected.

The invention relates to an oil and gas well throttle valve regulation and control method based on deep reinforcement learning, and belongs to the technical field of oil exploitation, and the method comprises the following steps: S1, fitting a throttle valve opening-flow characteristic model by using a multilayer perceptron according to detection data of a valve; s2, intelligent agent construction of deep reinforcement learning is carried out on the fitted throttle valve opening-flow characteristic model based on Markov decision, and one valve corresponds to one intelligent agent; and S3, solving a specific valve opening degree by utilizing the intelligent agent, so as to carry out intelligent valve regulation and control according to a production target of a user. According to the method, the logic explanation module of state-action mapping is constructed, the influence of key parameters on the throttle valve opening decision can be determined, the flow is accurately regulated and controlled, and the production benefit is maximized.

The invention discloses a single-feedback closed-loop proportional throttle valve of an integrated amplifier, and relates to the technical field of throttle valve production. An integrated amplifier single-feedback closed-loop proportional throttle valve comprises a main valve, a pilot proportional valve, a displacement sensor and an amplifier, and single-feedback closed-loop control over displacement of a main valve element is formed through a built-in oil way and electric signal feedback. On the basis that a main valve and a pilot proportional valve adopt a threaded plug-in integrated design, an integrated amplifier and a displacement sensor are taken as cores, a single-feedback closed-loop control loop is constructed, a slide valve structure of the pilot proportional valve is matched with precise electromagnetic control, the movement flexibility and clamping stagnation resistance of a valve element are remarkably improved, and the service life of the pilot proportional valve is prolonged. The technical problems that a traditional double-feedback proportional throttle valve is complex in structure and prone to clamping stagnation are effectively solved, accurate proportional throttle control under the high-pressure large-flow working condition is achieved, and the double-feedback proportional throttle valve has the remarkable advantages of being compact in structure, fast in response, high in anti-pollution capacity and high in reliability.

The invention discloses an exhaust temperature increasing method, system and device and a computer readable storage medium, and relates to the technical field of internal combustion engine tail gas treatment, and the method specifically comprises the steps that target conversion efficiency corresponding to the real-time exhaust temperature is determined according to the exhaust temperature and a preset mapping relation table between the exhaust temperature and the conversion efficiency; when it is detected that the target vehicle is in the low-load working condition, the target opening degree of an inter-cooling throttle valve is determined based on the target conversion efficiency, the real-time supercharger outlet temperature and the real-time supercharger flow; and the opening degree of the intercooling throttle valve is controlled according to the target opening degree, so that the exhaust temperature is increased. The exhaust temperature can be increased on the premise that the energy utilization efficiency and hardware safety are guaranteed.

The invention relates to the technical field of oil exploitation equipment, and discloses a 175MPa ultrahigh pressure electric remote control fracturing wellhead device which comprises a Christmas tree assembly, an oil pipe head assembly and a casing head assembly which are connected through flange plates, and throttle valve sleeves are installed on the left side and the right side of the Christmas tree assembly. The main switch and the four-way pipeline on the Christmas tree assembly are each provided with an electric control valve used for remotely controlling opening and closing of the valve. The 175 MPa ultrahigh pressure electric remote control fracturing wellhead device can effectively solve the problems that in the prior art, a casing head, an oil pipe head and a Christmas tree are connected in a fastened mode through flange plates and bolts mostly, the installation efficiency needs to be improved, a self-locking structure is lacked, looseness is prone to occurring, and then the sealing performance is insufficient; the problems that mixed sand grains in a produced oil-gas mixture cause serious erosive wear, blockage, equipment damage and the like to a production system, the erosive wear to a throttle valve is most serious, and the inside of the throttle valve does not have anti-erosion measures are solved.

A fuel delivery arrangement for a generator can include a throttle-mixing assembly including a mixer body defining a main port extending between an air inlet end and a mixed air-fuel outlet end and defining a fuel inlet port extending into the main port, a Venturi structure located within the main port and being configured to mix fuel received from the fuel inlet port with air received from the air inlet end and to deliver an air-fuel mixture to the air-fuel outlet, a fuel control valve assembly, mounted to the mixer body, including a first valve and a first actuator arranged to control a flow of the fuel passing through the fuel inlet port, and a throttle control valve assembly, mounted to the mixer body, including a second valve and a second actuator arranged to control a flow of the air-fuel mixture passing through the main port.

According to one aspect, the invention relates to a method (100) for controlling a position of a throttle valve of an engine, the method (100) comprising, when a difference in position between a position of the throttle valve and a position setpoint is determined, the steps that consist in: • - controlling (103) the position of the throttle valve by means of a proportional-integral-derivative controller applied to a pulse width modulation control of an electric motor configured to position the throttle valve, each of the terms of the controller being tabulated; • - adding (104) a first positive or negative offset to the proportional term when the determined position offset is positive or negative, respectively; • - adding (105) a second offset to the proportional term as a function of a pressure drop determined between the air inlet and the air outlet of the throttle valve body assembly; • - adding (106) a first oscillatory value dependent on the pressure drop to a value output by the controller; • - adding (107) a second value to the value output by the controller, the second value being selected from a table of throttle valve position differences measured with respect to a rest position of the throttle valve.

The utility model discloses a heatable intake manifold suitable for a methanol engine, which comprises an intake manifold main body and an intake manifold heating branch, interlayers are arranged in double walls of the intake manifold main body, the intake manifold heating branch comprises a temperature control throttle valve, an intake manifold interlayer and a reversing valve, the intake manifold interlayer is provided with a water inlet, and the reversing valve is provided with a water outlet. Fin plates are embedded in the air inlet manifold interlayer, electric heating wires are embedded in the air inlet manifold interlayer, a water inlet of the air inlet manifold interlayer is connected to a temperature control throttling valve through a water channel, an output port of the temperature control throttling valve is connected to a water outlet main pipe, and a water circulation pipeline passes through a wax type thermostat from the water outlet main pipe. The thermostat first water circulation of the wax type thermostat is that the wax type thermostat is connected with a reversing valve and then is connected to an engine cylinder sleeve, and the thermostat second water circulation connected with the output end of the wax type thermostat is that the wax type thermostat is connected to a water tank and is connected to the engine cylinder sleeve through the water tank. According to the utility model, the direct heating of the intake manifold is efficiently realized, and the heating efficiency of the intake mixed atmosphere is improved.

The present application relates to the field of rock mechanics property testing, and discloses a test device for rock shear creep impact disturbance loading. The device comprises a control box, an air compressor, a fixed plate, a pressure sensor, a fixed base, an air cylinder, a speed regulating throttle valve, an anti-rotation rod, an anti-rotation plate and a ram. The control box is connected with the pressure sensor and the air compressor through wires; the loading end of the pressure sensor is connected with the fixed base, and the base is installed on the fixed plate; the rear end cover of the air cylinder is connected with the fixed base, and the piston rod end is connected with the ram; the lower part of the ram is provided with an anti-rotation rod connecting lug, and the anti-rotation rod is fixed with the anti-rotation plate through the connecting lug. The air compressor is connected with the speed regulating throttle valve, the ram reciprocating motion is controlled by adjusting air pressure through the control box, and shear impact disturbance loading is realized. The present application can simulate real disturbance working conditions such as blasting and earthquake, has intelligent regulation and control functions of disturbance frequency and load, and is suitable for rock shear creep impact disturbance test.

The application discloses a refrigeration system and a control method, device, equipment and medium thereof, to provide a refrigeration system coexisting air-cooled refrigeration mode and liquid-cooled refrigeration mode. The system comprises a compressor circulation heat exchange system and a natural cold source circulation heat exchange system for heat exchange through an intermediate heat exchanger. The compressor circulation heat exchange system comprises a throttling valve, a first condenser and at least one compressor connected in sequence on the primary side of the intermediate heat exchanger, one end of the primary side of the intermediate heat exchanger is connected with the throttling valve, and the other end is connected with the common end of the at least one compressor. The natural cold source circulation heat exchange system comprises a pump, an air-cooled heat exchanger, a liquid-cooled heat exchanger and a second condenser connected on the secondary side of the intermediate heat exchanger. The air-cooled heat exchanger and the liquid-cooled heat exchanger are connected in parallel and then connected between the pump and the second condenser. One end of the secondary side of the intermediate heat exchanger is connected with the second condenser, and the other end is connected with the pump.

The invention provides a control method of a target test loop and a CO2 ice making test system, and belongs to the technical field of refrigeration circulation. The method comprises the following steps: acquiring a working condition and an ice surface load demand; determining a target circulation mode from a plurality of preset circulation modes based on the working condition and the ice surface load demand; controlling the opening and closing states of each valve in the valve module according to the connection relation of the compressor module, the oil separator, the exhaust pre-cooling module, the heat recovery module, the air cooler, the flash tank, the multiple heat regeneration modules, the ejector, the CO2 circulation module, the ice making module, the gas-liquid separator, the valve module and the throttling valve module; constructing a target test loop corresponding to the target circulation mode; determining a target control parameter set corresponding to the target circulation mode according to the working conditions; and adjusting the opening degree of the throttle valve module based on the target control parameter set so as to control the operation of the target test loop.

The application discloses a kind of liquid static pressure rotary table and machine tool.The liquid static pressure rotary table includes rotary table main body and first throttle valve.Rotary table main body includes base, drive part and rotary table part, drive part is fixedly installed on base, rotary table part is installed on base and rotates under the drive of drive part, rotary table part has first static pressure cavity between base;First throttle valve includes valve seat, diaphragm and cover plate, cover plate is covered on valve seat, the side of valve seat close to cover plate is provided with cavity, the central part of cavity has throttling boss, throttling boss is provided with oil outlet hole on its axis, oil outlet hole extends to the bottom of base and is communicated with first static pressure cavity, diaphragm is arranged in cavity and is formed with pressure stabilizing chamber with base, diaphragm and cover plate form adjusting chamber, base is installed on rotary table main body.The liquid static pressure rotary table and machine tool of the application can at least solve the problem of poor rigidity of the liquid static pressure rotary table in the prior art.

This invention relates to the field of automated testing technology, and in particular to a production line for the grooving process and valve body testing of a short-pipe throttle valve, including a valve body forming device, a valve body transfer device, and a valve body testing device. The valve body forming device, valve body transfer device, and valve body testing device are all mounted on a frame. This production line integrates a continuous production line with automatic feeding, grooving, water pressure testing, and automatic sorting, connecting discrete manual workstations into an automated process. By replacing "air testing" with "water testing," the physical characteristics of the testing medium (water) are closer to those of the actual refrigerant, and it can more effectively detect defects that are difficult to detect by air testing, such as micro-leakage and insufficient flow.

The invention provides a compaction control system of a heat treatment furnace door, which comprises a mechanical structure and software control, the mechanical structure comprises six hinge mounting seats mounted on the outer side of a furnace chamber, and the six hinge mounting seats are respectively arranged on the upper, middle and lower parts of the left and right sides of the furnace chamber; an air cylinder and a curved surface pressing block mechanism are installed on each hinge installation base, the air cylinders move to drive the curved surface pressing block mechanisms to do curvilinear motion, and rolling bearings are symmetrically installed on each curved surface pressing block mechanism in the axial direction; a metal protection plate is installed at the corresponding position of the furnace door, when an air cylinder moves forwards or backwards, a pressing block on a curved surface pressing block mechanism is driven to do curvilinear motion, the furnace door is pressed through a rolling bearing, and the rolling bearing makes rolling motion after making contact with the metal protection plate. Software control adopts synchronous action control of six air cylinder systems on the left side and the right side, air supply and exhaust of air cylinders are independently controlled through middle-sealed type electromagnetic reversing valves respectively, and the air cylinders adjust clamping blocks to act synchronously through precise exhaust throttling valves.