803 results about "Choke valve" patented technology

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 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 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 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 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 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.

This invention relates to the field of transformer technology and discloses a transformer with a rapid oil drainage structure, including a transformer body. An oil tank groove is formed on the inner wall of the transformer body. A support frame is fixedly mounted at the bottom of the transformer body, and an auxiliary frame is fixedly mounted at the bottom of the support frame. A motor is fixedly mounted on the inner wall of the auxiliary frame, and a transmission rod is fixedly sleeved on the output shaft of the motor. An oil inlet plate is fixedly mounted on the top of the transmission rod, and the bottom of the oil inlet plate is rotatably connected to the bottom of the inner wall of the oil tank groove. A guide groove is formed on the inner wall of the oil inlet plate. By employing a three-layer oil drainage pipeline consisting of an upper pressure-sensing electric valve, a middle electromagnetic ball valve with a throttle valve, and a lower rotating oil inlet plate and a one-way gear pump, synchronous oil flow can be achieved in emergency scenarios, improving the oil drainage efficiency compared to traditional structures. The lower rotating oil inlet plate, combined with a silicone scraper, can scrape away deposited impurities at the bottom of the oil tank, and the negative pressure suction of the one-way gear pump reduces the residual oil rate.

The compression system (100) has a compressor (150) with an inlet duct (110) and an outlet duct (120) and an anti-surge recirculation loop (140) which may recirculate fluid from the outlet duct (120) to the inlet duct (110) and regulate the flow along the anti-surge recirculation loop (140) through a throttling valve (145). The compression system (100) is further provided with another throttling valve (155) directly located at the compressor outlet flange (112), preferably at a distance from the compressor outlet flange (112) which is less than three times the inner diameter of the outlet duct (120), and a control unit (160) which controls and regulates the opening and closing of the throttling valves (145, 155). The combined control of the opening / closing of the two throttling valves (145, 155) allows to find a stable operating point of the compressor (150) which is on the left of the expecting surge limit line of the machine, extending thus the stable operation conditions of the compressor (150) and protecting the compressor (150) from the risk of surge.

The invention relates to a whole-house zero-cold-water control system, which is characterized in that a hot water pipe network residual water recovery and storage functional module is arranged in parallel between normally closed electromagnetic valves (14) and (18) arranged on an outlet pipeline of a water heater (2). After a user uses hot water and closes a water mixing valve, when the temperature of residual water in a hot water pipe network is reduced to a set range of a temperature sensor (19), a controller (6) opens an electromagnetic valve (18) and a one-way electromagnetic valve (17), a two-way water pump (16) is started to run forwards, under the action of atmospheric pressure, one-way valves (13) and (5) are opened, and all residual water in the hot water pipe network is recycled into a water storage tank (7). The hot water pipe network in which the residual water is emptied waits for the next use of the user. When the user opens the faucet (or the shower head) again to use hot water, the hot water flows out of the faucet (or the shower head), and zero cold water outlet is achieved. In the hot water using process, the controller (2) starts the two-way pump (16) to operate reversely, and recycled residual water stored in the water storage tank (7) flows into the hot water pipeline (21) through the one-way throttle valve (15) to be recycled. Zero cold water discharge is realized, and water resources are saved.

The application discloses a scroll compressor with an oil return mechanism and belongs to the scroll compressor field, which comprises a compressor body, a static disc and a dynamic disc, the end of the compressor body is fixedly connected with the static disc, the compressor body is rotationally provided with the dynamic disc through a bearing and a crankshaft at one end close to the static disc, the side, away from the compressor body, of the static disc is provided with a high-pressure cavity, the high-pressure cavity is internally provided with an oil separator, and the compressor body is provided with a low-pressure cavity at the side of the dynamic disc. The first oil return channel and the throttle valve are arranged at the bottom of the high-pressure cavity, the second oil return channel is matched with the third oil return channel and the sealing channel, two oil paths are formed, the dead-zone lubricating oil can be introduced into the sealing groove by the pressure of the high-pressure cavity, the pressure at the bottom of the sealing strip is provided to lift the sealing strip, the sealing rubber strip is compressed, the sealing strip is tightly attached to the dynamic disc, the sealing property is improved, the leakage is reduced, and the compressor performance is improved.

This utility model provides a throttle valve with a pressure relief structure, comprising: a valve body, wherein an inlet channel, a medium flow channel, and an outlet channel are sequentially connected within the valve body, and a pressure relief channel communicating with the medium flow channel is also provided within the valve body; and a pressure relief assembly, disposed at the end of the pressure relief channel away from the medium flow channel and threadedly connected to the valve body, for switching the pressure relief channel between open and closed states. This solution, by providing a pressure relief channel and a pressure relief assembly, allows for pressure relief before the throttle valve is decommissioned, preventing injury to operators due to excessive residual pressure inside the throttle valve during removal.

The invention provides a vehicle thermal management system vehicle-mounted refrigerator refrigerating device, a vehicle and a control method. The vehicle thermal management system vehicle-mounted refrigerator refrigerating device comprises a first electronic throttle valve, a second electronic throttle valve, a refrigerator evaporator, a micro booster pump, a switching valve and a controller. The first electronic throttle valve and the second electronic throttle valve are connected in parallel between an outlet of a vehicle condenser and an inlet of a refrigerator evaporator; an outlet of the refrigerator evaporator is connected with the input end of the switching valve, the first output end of the switching valve is connected with the common air return pipeline, the second output end of the switching valve is connected with the pressurization air return pipeline, and the miniature booster pump is arranged on the pressurization air return pipeline. And the output ends of the common air return pipeline and the pressurized air return pipeline are converged and then connected to a low-pressure air return port of the vehicle compressor. According to the vehicle-mounted refrigerator refrigerating device of the vehicle thermal management system, the vehicle and the control method, the comprehensive effects of energy conservation, noise reduction, weight reduction, cost reduction and reliability improvement can be achieved while rapid cooling of the refrigerator is achieved.

The utility model relates to the technical field of throttle valves, in particular to a throttle valve convenient for flow regulation, which comprises a housing, a water delivery pipe fixedly sleeved on the top of the housing, a solenoid valve input end communicated with the bottom of the water delivery pipe, a solenoid valve output end communicated with the top of an upper connecting pipe, and a support frame fixedly connected with the bottom of the housing. A rotating shell is rotationally installed in the supporting frame, the interior of the rotating shell is slidably connected with the top of a sliding rod, the bottom of the sliding rod is slidably connected with a limiting disc, the sliding rod is fixedly sleeved with a partition plate, a lower connecting pipe is arranged on the lower side of the partition plate, the bottom end of the upper connecting pipe and the top end of the lower connecting pipe abut against the partition plate, and the bottom end of the lower connecting pipe communicates with a drainage pipe; the flow is preliminarily adjusted by controlling the number of the electromagnetic valves opened by an external control device, the flow is further adjusted by controlling the pore size of water flow between the upper connecting pipe and the lower connecting pipe through rotation of the partition plate, and correspondingly, the flow of water flow is obviously changed.

The invention relates to a valve arrangement (1; 81; 91) with several functional modules arranged in series from the group consisting of: 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) 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 port (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) designed to control a fluid flow between the fluid port (36) and the fluid supply line (18).wherein the safety control (7) is configured for the safety-oriented blocking of electrical control signals for the safety valves (51, 52), wherein the throttle valve is configured for a temporary reduction of a working pressure in the fluid supply line (18) and wherein a valve control (5) is configured for controlling the valve disc group (8) and the safety valve group (7).

The application discloses a transcritical CO2 ultra-high temperature heat pump system and a temperature control method, wherein supercritical CO2 is a high-temperature and high-pressure fluid at the outlet of a gas cooler, throttles to an evaporation pressure, and a large amount of throttling loss exists, which leads to the decrease of the heating energy efficiency ratio of the transcritical CO2 heat pump system, and is not conducive to the best energy-saving benefit of the ultra-high temperature heat pump. In view of the above problems, the application innovatively couples gas-electric dual-drive technology, two-stage compression intermediate cooling technology and mechanical supercooling technology, which can effectively reduce the high-pressure fluid temperature before the throttling valve of the CO2 working medium, reduce the throttling loss, drive the supercritical compressor through the adjustable turbine expander, reduce the power consumption of the compressor, improve the heating energy efficiency of the CO2 heat pump system, and flexibly and efficiently and stably supply steam in a wide range of variable working condition adjustment, improve the full working condition operation efficiency, achieve the purposes of energy saving and emission reduction and production cost reduction, and further widen the application range and application prospect of the high-temperature heat pump system.

The application discloses a real-time control method, a controller and a control system for a hydraulic variable-damping oil cylinder, wherein the control method comprises the following steps: acquiring in real time piston position information and external driving force information of an oil cylinder piston, calculating actual position information, actual speed information and actual acceleration information of the oil cylinder at a current time of the oil cylinder based on the position information and the external driving force information of the piston by using a filter algorithm, obtaining target position information, target speed information, target acceleration information of the oil cylinder at the current time and output force required for forming a target trajectory based on a target trajectory of the oil cylinder, obtaining a closed-loop target output force of a spool control system based on the above information, and calculating target spool position information of a throttle valve spool at the current time based on an actual flow of the throttle valve at the current time and the closed-loop target output force of the spool control system, so that the stability of target trajectory tracking can be ensured.

Provided in the present application are an electric vehicle thermal management system and a control method therefor. The electric vehicle thermal management system comprises a heat pump loop, a waste heat loop and a heat storage bypass; the heat pump loop is successively provided with an evaporator, a compressor, a condenser and a throttle valve in the flow direction of a refrigerant; the waste heat loop is successively provided with a first waste heat pipe, a heat source component, a second waste heat pipe and the evaporator in the flow direction of a cooling liquid; the heat storage bypass is connected in parallel to a branch section of the second waste heat pipe, and the heat storage bypass is provided with a heat storage device. In the electric vehicle thermal management system provided by the present application, a portion of heat released by the heat source component during operation can be transferred to the evaporator by means of the second waste heat pipe, and another portion of the heat can be released by means of the heat storage device in the heat storage bypass, so as to provide heat for vaporization of the refrigerant in the evaporator, thereby ensuring normal operation of the heat pump loop. The present application does not require starting a PTC backup heat source, and thus does not consume additional electric energy of a power battery, thus reducing energy consumption of electric vehicles.

The invention discloses a liquid hydrogen production device and a working method thereof.The liquid hydrogen production device comprises a first heat exchanger, a pipe mechanism, a conversion mechanism, a cooling mechanism and a valve bank, a second cooling medium inlet, a first inlet and a first outlet are formed in the first heat exchanger, and the pipe mechanism comprises a first cooling pipe; and the first cooling pipes are connected with the first heat exchanger. The valve set comprises a second throttling valve, the second throttling valve is installed on a first cooling pipe, the first cooling pipe is communicated with a first outlet and a second cooling medium inlet, and circulating hydrogen entering the first heat exchanger from the first inlet exchanges heat with circulating hydrogen cooled and depressurized through the cooling mechanism. And the first cooling medium flows into the first cooling pipe from the first outlet, is throttled by the second throttling valve and enters the first heat exchanger from the second cooling medium inlet. The raw material hydrogen is cooled through the mode that expansion continuous refrigeration of the cooling mechanism cooperates with high-pressure throttling refrigeration, energy is saved, and meanwhile the product hydrogen with the parahydrogen content reaching 97% is produced.

The invention provides a jet-absorption heat pump, and belongs to the technical field of refrigeration and heat pumps. The absorber is provided with a dilute solution pipeline which is communicated with the generator through a solution pump and a solution heat exchanger, the generator is further provided with a concentrated solution pipeline which is communicated with the absorber through the solution heat exchanger, the generator is further provided with a refrigerant steam channel which is communicated with the condenser, and the condenser is further provided with a condensate water channel which is communicated with the outside. The condenser communicates with the evaporator through a refrigerant liquid pipeline via a throttling valve, the evaporator communicates with a low-pressure steam inlet of the ejector through a refrigerant steam channel, a working steam channel communicates with a high-pressure steam inlet of the ejector outside, the ejector communicates with the absorber through a medium-pressure refrigerant steam channel, and the generator communicates with the outside through a high-temperature heat medium channel. The absorber and the condenser are communicated with the outside through heated medium channels respectively, the evaporator is communicated with the outside through a low-temperature heat medium channel, and the jet-absorption heat pump is formed.

This invention discloses an automatic fluid mixing device for coiled tubing drilling, belonging to the field of petroleum machinery technology. It includes a water supply line, a mixed fluid outlet line, an intelligent control terminal, a flow meter, a pressure sensor, a skid-mounted unit, a flexible hose, a first connecting pipe, a second connecting pipe, a third connecting pipe, a centrifugal pump, an electric throttle valve, and a drag-reducing agent pump. The water supply line is sequentially equipped with an inlet union, a first butterfly valve, and a filter. The electric throttle valve is located on the first connecting pipe, and the centrifugal pump is located on the second connecting pipe. The mixed fluid outlet line is equipped with a flow meter, a second butterfly valve, a third butterfly valve, and an outlet union. One end of the flexible hose is connected to the drag-reducing agent pump, and the other end is connected to the mixed fluid outlet line. A fourth butterfly valve is located on the third connecting pipe. This invention enables real-time adjustment of pressure and flow rate, as well as precise proportional mixing of the drag-reducing agent, improving the performance of the mixed liquid.

The utility model relates to a high-flow quick-opening valve group for a hydraulic oil cylinder, which is integrated on a valve block, and a valve group and an energy accumulator are arranged in the valve block; the valve block is provided with a pressure oil port, an oil return port and a leakage port, the pressure oil port is further connected with a pressure stabilizing branch, the oil return port is further connected with an oil return branch, and the leakage port is further connected with a leakage branch; the valves comprise a pressure reducing valve, three electromagnetic cone valves, three throttling valves, two balance cone valves and a three-way electromagnetic reversing valve, the three electromagnetic cone valves are respectively a first electromagnetic cone valve, a second electromagnetic cone valve and a third electromagnetic cone valve, the three throttling valves are respectively a first throttling valve, a second throttling valve and a third throttling valve, and the three-way electromagnetic reversing valve is connected with the three-way electromagnetic reversing valve. The two energy accumulators are respectively a first balance cone valve and a second balance cone valve, and the energy accumulators comprise a diaphragm type energy accumulator and a piston type energy accumulator. The large-flow hydraulic quick-opening valve bank can meet the requirement for large driving force, can easily meet the requirement for high torque of a large rotary valve, and is suitable for high-pressure, large-caliber or severe working conditions.

The utility model discloses a kind of loader braking systems, which belongs to the technical field of engineering machinery.It solves the defect that when the whole machine continuously brakes at high frequency, the braking performance of the conventional loader braking system in the prior art is poor and even brake disappears briefly.The main structure includes brake valve, force pump, brake fluid container, switch valve and brake caliper, the brake valve is connected with the signal end of the large cavity of force pump and switch valve respectively, the small cavity of force pump is connected with the piston large cavity of brake caliper through one-way throttle valve, the piston large cavity of brake caliper is also connected with brake fluid container through switch valve, and brake fluid container is also connected with the small cavity of force pump.The utility model is mainly used on engineering machinery such as loader.

The invention discloses a workover treatment efficient dismounting device based on a hydraulic boosting system and an operation method. The workover treatment efficient dismounting device comprises a supercharger and a back striking wrench. The supercharger comprises a shell, an oil way core, a throttling valve, an overflow valve, a control valve and a filter are installed in the shell, a supercharging module, an operating handle, an input inlet, an input outlet, a pressure measuring connector, an output inlet and an output outlet are installed outside the shell, the operating handle is connected with the control valve, and the supercharging module is connected with the filter. The back beating wrench comprises a bent handle, and the head of the bent handle is connected with a jackscrew. According to the invention, the function of dismounting rusted screws by using the low-pressure hydraulic pump of the workover rig in a manner of driving liquid with liquid is realized, the operation construction efficiency is improved, and the potential safety hazard of operation is eliminated.

The utility model relates to the field of gas field production, in particular to a heatable throttle valve for a gas well, which comprises a throttle valve respectively communicated with an inlet pipeline and an outlet pipeline. The electromagnetic induction coil is arranged on the periphery of the throttling valve; the controller is in communication connection with the electromagnetic induction coil, and the controller can control the electromagnetic induction coil to be opened or closed. The throttling valve is directly heated through the electromagnetic induction coil, the heating efficiency is high, it can be ensured that the throttling valve is not blocked by ice in high-pressure gas well large-pressure-difference pressure reduction throttling or low-temperature weather in winter, and the normal use requirement is met.

The present application belongs to the technical field of fluid intelligent control of numerical control machine tool, in particular to a numerical control machine tool external throttling monitoring system and control method. The system comprises a main liquid supply pipeline, a plurality of throttle valve units, and an integrated base fixedly connected with the inlet of the main liquid supply pipeline. The inside of each throttle valve unit is uniformly distributed with a thin film flow sensing sheet, and the outside is provided with a state indicator lamp for prompting the optimal throttle valve opening position. The method comprises: establishing a unified fluid dynamics and coordinate reference; determining whether the current opening needs to be adjusted based on the flow information and flow field distribution of the in-valve sensing sheet within the effective flow period, and guiding the operator to perform valve position adjustment through the state indicator lamp; and performing reset, recording and conservation strategy at the end of the event to ensure the implementability and reproducibility under different installation attitudes, different machining conditions and environments. The present application realizes adaptive throttling control of the external cooling / lubricating system of the numerical control machine tool, and improves the machining stability and fluid utilization efficiency.

The throttling assembly comprises a valve port piece, a valve needle and a valve bonnet, the valve port piece is provided with a valve port allowing fluid to flow in, the head section of the valve needle penetrates through the valve port, and in the state that the head section of the valve needle penetrates through the valve port, a first overflowing gap allowing the fluid to flow through is formed between the outer circumferential face of the head section of the valve needle and the inner circumferential face of the valve port; the valve bonnet is arranged outside the middle section of the valve needle in a sleeving mode, the valve bonnet is provided with a flow gathering structure, and the flow gathering structure is communicated with the valve port and used for allowing fluid flowing through the first overflowing gap to flow in and gather so that the fluid can push the valve bonnet to be away from the valve port piece to drive the valve needle to be away from the valve port. According to the throttling assembly and the throttling valve, the valve bonnet and the valve needle can be easily pushed by fluid, so that the hysteresis quality of fluid flow control can be reduced, and the sensitivity of fluid flow control is improved.