143 results about "Sleeve valve" patented technology

The invention discloses a construction method of an E-shaped portal rigid frame structure under the condition of multi-level height limitation, the E-shaped portal rigid frame structure is hoisted and constructed under the condition of multi-level height limitation, and the multi-level height limitation comprises eight levels of heights from an area A to an area H. Construction planning is conducted, specifically, the E-shaped portal rigid frame structure is vertically divided into three vertical areas including an area I, an area II and an area III, and each vertical area is transversely divided into five transverse areas; step 2, filling a karst cave: filling a cave body by using sleeve valve pipe grouting according to filling requirements; 3, pipe pile construction is conducted, specifically, pile driving is conducted in place in the construction area through a pile machine; 4, foundation construction is conducted, specifically, foundation construction is completed in the construction area; and 5, steel structure construction is conducted, specifically, construction of five transverse areas is sequentially conducted in the three vertical areas at the same time. According to the construction method, smooth construction of the portal rigid frame structure within the limited hoisting height is ensured, and the requirements for safety, quality and construction period efficiency are met.

A valve trim assembly for a control valve including a first sleeve having a spiral hole pattern and configured to be coupled to an outer surface of a cage assembly, a second sleeve having a spiral hole pattern and configured to be coupled to a wall of the cage assembly, and a third sleeve having a spiral hole pattern and configured to be coupled to a valve plug moveable between a closed position and an open position. The valve trim assembly also includes a first pressure recovery area disposed between the first and second sleeves, and a second pressure recovery area configured to be disposed between the cage assembly and an outer surface of the valve plug when the valve plug is in the open position.

The invention discloses a retreating type segmented sleeve valve pipe grouting process for karst treatment, and belongs to the technical field of karst stratum reinforcement. The process comprises the steps of drilling construction, device arrangement, grouting positioning, segmented grouting, retreating type displacement grouting and ending treatment, and is characterized in that a grouting core pipe adopts a sealing telescopic connecting structure of an inner core pipe and an outer sleeve, and is matched with a telescopic driving piece, an elastic connecting piece and a first pressure sensor; dynamic adjustment of the size of a grouting space and real-time monitoring of pressure are achieved, and the risk of excessive or insufficient grouting is avoided in an intermittent grouting mode; the vent pipe and the one-way valve are staggered, pressure in the pipe is balanced, the one-way valve is assisted to rapidly retract, and backflow and slurry mixing are avoided; and the optional rotating device and the stirring piece cooperate to prevent slurry deposition, so that the grouting uniformity is improved. The grouting precision and controllability are remarkably improved, safety and stability of construction are comprehensively guaranteed, the grouting filling compactness and long-term stability are optimized, and the method is suitable for layering of karst caves in different forms.

The utility model relates to the technical field of geotechnical engineering monitoring, and discloses a one-hole multi-hole manometer embedding device combined with a bag type grouting method, which comprises a plurality of sleeve valve pipes which are screwed end to end, and a first pipe body and a second pipe body which are abutted end to end are arranged in each sleeve valve pipe. The outer wall of the sleeve valve pipe is provided with a liquid outlet and a sliding groove which are communicated with the interior of the first pipe body and the interior of the second pipe body respectively, the sleeve valve pipe is fixedly sleeved with an annular air bag used for wrapping the liquid outlet, and the sleeve valve pipe is movably sleeved with a protective sliding sleeve capable of wrapping the annular air bag. The annular air bags arranged outside the sleeve valve pipes can expand to abut against the inner wall of a drill hole when pressure is built in the sleeve valve pipes, so that the water pressure sensors on the adjacent sleeve valve pipes are located in independent spaces which are not communicated, the annular air bags are wrapped by the protective sliding sleeves before being expanded, and when pressure is not built in the sleeve valve pipes, the annular air bags and the protective sliding sleeves are connected through the protective sliding sleeves. The protective sliding sleeve can protect the annular air bag from being scratched by sharp objects in the drill hole in the burying process.

The present application provides an external high-pressure air curtain steel casing, comprising two stacked steel casing bodies, the outer surfaces of the two steel casing bodies are provided with a plurality of air curtain devices, the air curtain devices comprising two side protection steel plates fixedly connected to the sides of the steel casing bodies, a plurality of adjustable fixed pipe clamps connected between the two side protection steel plates, and a sleeve valve tube connected between the plurality of adjustable fixed pipe clamps, with a plurality of air outlet holes provided on the sleeve valve tube. The present application provides an air curtain device on the outer peripheral side of the steel casing body, and can form an air curtain between the steel casing body and the soil by supplying compressed gas to the sleeve valve tube, thereby reducing the frictional resistance between the steel casing body and the soil, thereby simplifying the extraction process and improving construction efficiency; the airflow of the air curtain rises and sprays on the surface, and combined with the presence of groundwater, it actually causes the soil to liquefy, thereby significantly reducing the frictional resistance between the steel casing and the soil.

The utility model discloses a full-bore eccentric ball valve with a flow guide hole, which relates to the technical field of ball valves and comprises a valve body, a valve rod, a valve core and a sealing body, the flow guide hole is arranged on the valve core, sealing air bag rings are arranged on the valve core and positioned at openings at two ends of the flow guide hole, and an inflating component connected with the sealing air bag rings is arranged outside the valve core. A sleeve is arranged outside the valve element, the valve rod is rotationally connected to the sleeve, a reset spring is connected between the sleeve and the valve rod, and an extrusion piece used for extruding the inflation assembly is arranged on the valve rod. When the valve is opened, the two ends of the flow guide hole are sealed with the openings in the two sides of the valve body respectively, so that a medium is prevented from rushing into a cavity between the valve body and the valve element in the process of passing through the flow guide hole, vibration and noise generated by the valve in the medium circulation process are effectively reduced, and the service life of the valve is prolonged. And meanwhile, the flowing resistance of the medium can be reduced to a certain extent, and the stability of the medium passing through the valve is improved.

The invention provides a flow regulating mechanism in an electronic expansion valve, and belongs to the technical field of machinery. The flow adjusting mechanism in the electronic expansion valve comprises a rotor, an upper sleeve, a valve seat and a valve needle, a cavity is formed in the valve body, the valve seat is cylindrical and fixedly connected to the lower portion of the valve body, an inlet communicated with an inner cavity of the valve seat is formed in the side portion of the valve seat, an outlet communicated with the inner cavity of the valve seat is formed in the lower end of the valve seat, and the upper sleeve is fixedly connected into the rotor. The lower end of the lead screw is connected with the upper end of the valve needle, the upper end of the lead screw is located in the upper sleeve and is in threaded connection with the upper sleeve, the lower end of the valve needle is located in the valve seat, the valve needle blocks the outlet in the initial state, the outlet can be opened after the valve needle moves upwards, and a connecting assembly capable of preventing the valve needle from rotating is further arranged in the valve body. The flow regulating mechanism in the electronic expansion valve can enable the valve needle to move up and down smoothly.

A rotary valve subassembly includes a spool and a sleeve. The spool is positioned within the sleeve and rotatable relative to the sleeve. Rotating the spool relative to the sleeve can align a scalloped recess formed into an outer side surface of the spool with an inner circumferential recess formed into an inner side surface of the sleeve to fluidly-connect a pressurized fluid source and a low pressure fluid reservoir with a hydraulic actuator.

A system and method for hydraulic isolation of a downhole powered system. The system and method include a sliding sleeve, venting assemblies with venting ports, and check valves associated with a vent body, and an isolation sleeve, isolation valve, and integral packer for controlling fluid flow through the motor and pump assembly of the powered system. Also disclosed is a wet connect mandrel modified to receive the isolation sleeve, the isolation sleeve preferably capable of permitting the passage of tools therethrough and capable of preventing fluid through the inlet of the mandrel. The mandrel may also be outfitted with a built-in sliding sleeve. The sleeves, valves and packer can be actuated mechanically, hydraulically or electrically. Electrical actuation can be facilitated using the power from an adjacent wet connect mandrel.

The invention discloses a deep-buried tunnel structure fracture zone directional drilling sleeve valve pipe advanced sectional grouting method which comprises the following steps that S1, ground directional drilling is conducted, and a hole channel sequentially comprises a first-opening main hole public section, a second-opening main hole deflecting section, a third-opening branch deflecting section and a third-opening branch horizontal section from top to bottom; s2, lowering a sleeve valve pipe and filling a sleeve shell material; s3, segmented reinforcement grouting is conducted; and S4, a water pressing test is conducted after reinforcement and grouting. Through the arrangement, the grouting effect can be improved, and the construction period is shortened.

The utility model provides a gas valve regulating assembly of convenient operation, and the regulating assembly includes valve core, regulating rod, twist cap and connecting sleeve, is equipped with locking sleeve at the top of valve core, regulating rod is screwed with the inner chamber of locking sleeve, the upper end of regulating rod is fixedly connected with twist cap, the upper end of connecting sleeve is located and sets up on twist cap, the lower end of connecting sleeve can be located and sets up on locking sleeve, still be equipped with support structure between connecting sleeve and locking sleeve, after the lower end of connecting sleeve and locking sleeve location is removed, support structure makes connecting sleeve rotatably support on locking sleeve. When the utility model needs to twist regulating rod, pulls up connecting sleeve, thereby can drive twist cap to rotate, in turn twist cap drives regulating rod to rotate and carries out flow regulation, and because the setting of support structure, connecting sleeve also realizes the purpose of rotatable support on locking sleeve, and the operator does not need to hold connecting sleeve in the process of rotating connecting sleeve, and the overall structure design is reasonable, and operation is also convenient.

The utility model relates to a ball seat one-way valve which comprises an upper connector, a sleeve valve and a guide shoe, the outer wall of the upper end of the sleeve valve is fixedly connected with the inner wall of the lower end of the upper connector, and the outer wall of the lower end of the sleeve valve is fixedly connected with the inner wall of the upper end of the guide shoe. A ball seat and a push rod are arranged in the sleeve valve internal flow channel, the ball seat is fixed in the sleeve valve internal flow channel, and the push rod can axially move in the sleeve valve internal flow channel; a sealing ball for opening or closing an internal flow channel of the sleeve valve is arranged between the ball seat and the push rod; a spring is sleeved outside the push rod; the side wall of the sleeve valve is provided with a bypass hole communicated with an internal flow channel and the outside of the sleeve valve. A ball seat, a sealing ball and a push rod are arranged in a runner in the sleeve valve, and when the sealing ball is subjected to hydrostatic pressure, a spring is compressed to open the ball valve; the bypass can be opened only by the pressure of a liquid column in the oil pipe, and circulation is established; meanwhile, effective buoyancy is provided for the pipe column, and the risk that the pipe column encounters resistance in the open hole horizontal section tripping-in process is reduced.

The electronic expansion valve has a valve cavity and further comprises a core assembly, the core assembly comprising a body, a sleeve and a valve core seat, one end of the sleeve being fixedly and sealingly connected with the body and the other end being movably and sealingly connected with the valve core seat, the sleeve, the body and the valve core seat substantially defining a turbulence cavity, the body comprising a side wall portion and a connecting portion, the connecting portion comprising a bottom wall, fluid entering the turbulence cavity being capable of impacting the bottom wall so as to generate a turbulence effect, thereby relatively improving the noise of fluid flowing through the electronic expansion valve.

The invention discloses a pilot-operated valve internal part of a regulating valve, the regulating valve comprises a valve main body provided with a valve front cavity, a valve rear cavity and a balance cavity, the pilot-operated valve internal part comprises an upper sleeve, a lower sleeve, a valve seat, a small valve core, a spring and a valve plug, the upper sleeve, the lower sleeve and the valve seat are all fixedly arranged in the balance cavity, the upper sleeve is provided with an overflow hole, and the valve plug is provided with an overflow hole; the lower sleeve is provided with a flow characteristic control window, and the valve plug is installed in the balance cavity in a suspension installation mode. The valve plug is provided with an auxiliary fluid through hole, the small valve element is movably connected to the middle of the valve plug, and a spring is further arranged between the small valve element and the valve plug. The valve main body is also internally provided with two fluid channels, and the main fluid channel passes through the sealing surface of the valve seat from the valve front cavity to the valve rear cavity; the auxiliary fluid channel is from the valve front cavity to the balance cavity through the overflow hole and then to the valve rear cavity through the sealing surface of the small valve seat; the valve body is further connected with a valve rod used for driving the small valve element to move, and a valve position indicator is installed on the valve rod.

A sliding sleeve valve assembly with a fluid bypass for use in a wellbore. When a downhole section of the casing string is isolated from an uphole section by setting an isolation element in the valve assembly, the fluid bypass can allow allow for the release of hydraulic pressure from the downhole section. The fluid bypass can be open by default, can be opened by exceeding a burst disc rating, or can be opened by shifting the sliding sleeve to the open position. The fluid bypass can provide fluid communication between the downhole section and the uphole section, or between the downhole section and the wellbore annulus. The fluid bypass may be formed by a path that circumvents sealing within the annulus between the sleeve and the housing, or the fluid bypass may be formed by defeating sealing within the annulus between the sleeve and the housing.

The application provides an automatic pressure regulating and noise eliminating sleeve valve, which comprises an inlet elbow section, a resistive noise eliminating layer, a small-hole noise eliminating pipe, a valve plate and a valve rod, the valve rod drives the valve plate to move, the pipe axis direction of the inlet elbow section is perpendicular to the pipe axis direction of the small-hole noise eliminating pipe, the outlet end of the inlet elbow section is connected with the inlet end of the small-hole noise eliminating pipe, small holes are arranged on the pipe wall of the small-hole noise eliminating pipe to form an outlet, the valve plate is axially movable and arranged in the small-hole noise eliminating pipe, the resistive noise eliminating layer is sleeved outside the small-hole noise eliminating pipe to form a shell pipe, and the shell pipe formed by the resistive noise eliminating layer has an airflow outlet; the application controls the pressure difference before and after the valve by controlling the flow area of the perforated steel pipe, and realizes efficient reduction of the valve noise.

The utility model discloses a novel plunger type well drilling throttle valve, including throttle valve body and throttle valve control part, the throttle valve body has the liquid inlet buffer cavity and respectively with the installation hole, the liquid outlet hole, the connecting hole who communicates with the liquid inlet buffer cavity, the installation hole is equipped with the positioning piece, alloy erosion -resistant bushing, valve seat in proper order, the throttle valve control part includes drive arrangement, transmission main shaft, positioning short section, end sleeve, valve body gland, valve core, valve cage, valve rod connecting piece, valve core connecting bolt, valve rod, this novel plunger type throttle valve uses high temperature corrosion -resistant alloy at the fluid impact site and is designed as can be individually detached replacement structure, and the on -the -spot maintenance of equipment is convenient, and the whole structure is stable in operation, and the life is longer, and there is no larger vibration and noise in operation, and the starting torque is low, and the personnel operation is simple, and the special treatment of material can greatly increase the equipment use stability and security under the mud impact environment.

The invention relates to the technical field of sleeve valve pipe construction, in particular to a sleeve valve pipe grouting method and application thereof. Comprising the following steps: S1, establishing a three-dimensional geologic model in geological survey, judging the geology of a reinforcing area, and dividing the reinforcing area into a plurality of functional zones for hole site layout; s2, drilling equipment is moved to the hole site area, drilling operation is conducted, the hole site condition is observed, and acceptance inspection is conducted; s3, a sleeve valve pipe and an exhaust pipe are installed and lowered in a segmented mode, the upper end of the exhaust pipe is exposed out of the ground, the pipe body is fixed through a limiting device, the periphery of the sleeve valve pipe and the periphery of the exhaust pipe are filled with the mixed liquid for sealing, and initial setting is stable; s4, according to the functional partitions, filling operation is conducted through a jumping type grouting method, reinforced pouring is conducted at the last time, and grout is waited for initial setting; according to the method, the overall grouting procedure is optimized, the jumping type grouting method is adopted for grouting operation, the problems of slurry pressure concentration and uneven diffusion are effectively solved, and the construction efficiency is improved.

The utility model discloses an adjusting valve which comprises a valve body, a flow channel is formed in the valve body, a sleeve, a valve core and an actuator are further arranged in the valve body, and the actuator is connected with the valve core and slides in the sleeve to adjust and cut off the flow channel. The adjusting piece comprises an adjusting net and an adjusting block, a plurality of evenly-arranged adjusting holes are formed in the adjusting net, the adjusting block and the adjusting net are in sliding connection, the valve element is connected with the adjusting block and controls the adjusting piece to slide in the sleeve, and when the actuator controls and adjusts sliding, the adjusting net abuts against the bottom of the sleeve firstly, and then the adjusting net abuts against the bottom of the sleeve. And then the adjusting block slides to cling to the adjusting net and seals the adjusting hole. The utility model has the following advantage and effect: the flow passing through the valve body can be adjusted more carefully.

The utility model provides a stiffness valve and a fixed iron assembly thereof. The rigidity valve comprises a valve seat, a valve element and a fixed iron assembly. The valve element is sleeved with the fixed iron assembly and the valve seat. The valve element can move in the axial direction relative to the fixed iron assembly and the valve seat. The fixed iron assembly comprises fixed iron, the fixed iron is provided with an inner cavity used for containing a valve element, a circle of groove is formed in the cavity wall of the inner cavity, and a movable sealing rubber body is connected to the groove in a vulcanized mode. The dynamic sealing rubber body is located between the fixed iron and the valve element and matched with the peripheral wall of the valve element to form a dynamic sealing pair. By means of the configuration, the structure of the dynamic seal is simplified, the assembling difficulty and the machining cost of the dynamic seal are reduced, integrated dynamic seal is achieved, the sealing effect is better, and the sealing performance is more stable.

The utility model discloses a rapid segmented retreating type grouting device which comprises a grouting hose and a plurality of sections of supporting sleeves, and the multiple sections of supporting sleeves are sequentially and detachably connected in the axial direction. The rear end of each supporting sleeve is provided with a large inner diameter section, and the front end of each supporting sleeve is provided with a small outer diameter section. Each supporting sleeve comprises a supporting sleeve male piece and a supporting sleeve female piece, and the supporting sleeve male piece and the supporting sleeve female piece are both semi-cylindrical shells and define a cylindrical shell; the front end of the grouting hose is used for being connected with a grouting gun head to form a grouting pipeline. The supporting sleeve is used for wrapping the grouting hose and carrying the grouting hose and the grouting gun head to be forwards and coaxially inserted into the bottom of the sleeve valve pipe; and after grouting of the section is completed, the supporting sleeve and the grouting pipeline are pulled out upwards till all grouting of all the sections of the drill hole is completed. According to the rapid segmented retreating type grouting device, through the anti-overflowing lock head and the supporting sleeve, overflowing prevention of the grouting pipeline and continuous rapid operation of grouting of all segments are achieved.

The ultralow-temperature double-self-sealing high-pressure regulating valve comprises a valve body, a valve seat, a sleeve, a valve cover, a support, a valve rod and an executing mechanism, the support is connected with the valve cover through a bolt, and the upper end of the support is fixedly connected with the executing mechanism through a bolt; a pressing ring is arranged at the top of the sleeve; the valve seat is fixed on the valve body through a sleeve, a pressing ring and a check ring, and a first self-seal is adopted between the valve cover and the valve body; a stuffing box is arranged in the valve cover, a corrugated pipe assembly is installed between the valve rod and the stuffing box, the lower end of the corrugated pipe assembly is connected with a corrugated pipe connecting disc, the corrugated pipe connecting disc is connected with the valve rod, the upper end of the corrugated pipe assembly is connected with the stuffing box, and the stuffing box and the valve cover directly adopt second self-sealing. The corrugated pipe assembly is additionally arranged, the two-way self-sealing design is adopted, it can be guaranteed that zero leakage is achieved under the large-diameter ultralow-temperature high-pressure working condition, and the larger the working condition medium pressure is, the better the sealing performance is.

The invention provides a sleeve valve pipe, a grouting device and a grouting method, and belongs to the technical field of geotechnical engineering grouting. The sleeve valve pipe comprises an inner pipe used for placing a grouting mechanism so as to inject grout into the inner pipe; the at least three sections of outer pipes are sequentially and coaxially arranged outside the inner pipe, and an annular space is formed between the inner pipe and the outer pipes; each expansion mechanism is connected between the end parts of the two adjacent outer pipes and surrounds the inner pipe, and at least part of the inner side of each expansion mechanism is communicated with the inner pipe; each group of slurry injection assembly is positioned in an annular space between two adjacent expansion mechanisms and comprises a plurality of slurry injection channels, and each slurry injection channel is communicated with the interior of the inner pipe and the exterior of the outer pipe; and the plurality of stop valves are respectively arranged in the slurry injection channel, and each stop valve is configured to be opened when the pressure of the slurry in the slurry injection channel is greater than a preset value so as to allow the slurry in the inner pipe to flow to the outside of the outer pipe through the slurry injection channel.

The invention discloses a multistage protection early-warning protection method for a high-rise old house adjacent to a subway hub, and the method comprises the steps: installing an automatic static force level gauge and an automatic inclination monitor at the top of the old house, collecting the settlement and inclination data of the house in real time, and transmitting the settlement and inclination data to a data monitoring cloud platform, thereby forming a dual-control monitoring system with the combination of automation and manpower; house sleeve valve pipe grouting is conducted on the stratum around the old house; a row of isolation piles are constructed on the outer side of the station enclosure structure, high-pressure jet grouting piles are driven between the isolation piles, and a high-pressure jet grouting waterproof curtain is formed; top beams are constructed on the upper portions of the isolation piles and the top of the station enclosure structure in a top step mode, and the top beams of the isolation piles are connected with the top beams of the station enclosure structure through connecting plates; a recharge well is arranged between the foundation pit and the old house, and under-pressure recharge is conducted through the recharge well. The four-dimensional protection early warning comprehensive system for isolation, reinforcement, recharge and monitoring is formed, and the damage risk caused by settlement and inclination of the house due to construction disturbance is remarkably reduced.

The utility model relates to the technical field of valves, in particular to a sleeve type regulating valve with a valve element provided with a wave spring. A valve rod is arranged on a valve cover in a penetrating mode, a sleeve is installed in a valve body, the bottom end of the valve rod is connected with the valve element, the upper end of the valve element makes contact with the inner bottom end of the sleeve, the upper end of the valve element is connected with a sealing ring in a sleeved mode, and an O-shaped ring is connected to the inner ring wall of the sealing ring. A wave spring is arranged at the upper end of the sealing ring, and a pressing ring is in threaded connection with the outer side of the upper end of the valve element and extrudes the wave spring. The pressing ring and the valve element are assembled through the threads, the pressing ring forms initial compression on the wave spring, so that when the valve is closed, the sealing face of the sealing ring makes contact with the sleeve firstly, the sealing face of the valve element makes contact with the sleeve then, and the upper seal is effectively sealed through the spring force of the wave spring; when the valve is closed, under the dual action of the axial force of the valve rod and the spring force of the wave spring, the valve can achieve effective sealing while achieving upper sealing and lower sealing, and the requirement for the high-standard leakage grade of the valve element is met.

The present invention provides a liquid supply nozzle that can suppress the rotation of a shaft member that is displaced in response to the operation of an operating piece. [Solution] The nozzle 21, which is a liquid supply nozzle, supplies liquid fuel to the fuel tank by opening and closing a main valve 32 provided in the fuel supply passage 23 inside the nozzle body 22 when operated by a lever 31 which is an operating piece. The nozzle 21 includes a valve stem sleeve 37, a valve stem rod 38, an engagement rod 55, an automatic fuel supply stop mechanism 54, and a rotation prevention mechanism 61. The rotation prevention mechanism 61 prevents the valve stem rod 38 from rotating around its central axis. The rotation prevention mechanism 61 has, for example, a recessed portion 61A provided in the lever 31 and a stepped portion 61B provided at the end of the valve stem rod 38.

The utility model discloses a high stability proportional solenoid valve belongs to solenoid valve technical field, including valve body module, electromagnetic drive module, heat compensation module and dynamic voltage stabilizing module, the valve body module includes valve body, the valve sleeve valve core of pressure equipment in valve body front end hole to and is connected in valve body rear end face rear end cover, the electromagnetic drive module includes the magnetic conducting sleeve, the coil assembly of installation in the magnetic conducting sleeve to and drive valve core's push rod, the magnetic conducting sleeve front end is pressed into valve body middle hole, and the rear end is fixed through the flange bolt, the compensation ring of heat compensation module is in the excess of the magnetic conducting sleeve outer wall, the dynamic voltage stabilizing module includes the voltage stabilizing piston of being located in the blind hole of valve core tail part, the voltage stabilizing spring of top pressure piston to and the adjusting screw of adjusting spring pre -tightness. The present application offsets the thermal deformation of the magnetic conducting sleeve through the heat compensation module, and the dynamic voltage stabilizing module continuously absorbs the fluctuation of oil back pressure to make the output flow smooth and non-pulsating, and keeps the high stability of proportional control.

The present invention relates to an adapter, a valve device, a construction machine, a method for installing a valve device, and a control valve. The valve device of the embodiment includes a plate portion, a sleeve, a valve core, and a cover. The plate portion (7) is configured to the hydraulic valve device (5) and has a fixing hole (7B) for fixing the valve cover (5F). The sleeve (8) is fixed to the hydraulic valve device (5) and has a through hole (8C) for fixing the plate portion to the hydraulic valve device. The valve core (5B) is fixed to the through hole. The valve cover is fixed to the plate portion by means of the fixing hole and covers the valve core.

This invention discloses a regulating valve, comprising a valve body and a valve cover. Three pressure chambers are located between the valve body and the valve cover: a pre-valve chamber, a post-valve chamber, and a balancing chamber. The balancing chamber is positioned between the pre-valve chamber and the post-valve chamber. A pilot-operated valve internal is also installed between the valve body and the valve cover. The pilot-operated valve internal includes an upper sleeve, a lower sleeve, a valve seat, a small valve core, and a valve plug. The upper sleeve, lower sleeve, and valve seat are all fixedly installed within the balancing chamber. The upper sleeve has an overflow hole, and the lower sleeve has a flow characteristic control window. The valve plug is installed in a suspended manner within the balancing chamber. A spring tension sealing ring that cooperates with the valve plug is also installed between the upper and lower sleeves. The valve plug has an auxiliary fluid passage, and the small valve core is movably connected to the middle of the valve plug. The valve body also has two fluid channels.

A reheat regulating valve for a subcritical 300MW steam turbine. This invention relates to the field of steam turbine technology. The invention addresses the common problems of poor tightness and poor adjustability in existing subcritical 300MW steam turbine reheat regulating valves. The invention includes a pre-opening valve, a locking nut, a valve stem, a medium-pressure regulating valve connecting sleeve, a valve disc, a valve cover, a valve seat, a valve body, and a bushing. The lower end of the valve stem is fixedly connected to the pre-opening valve, and the upper end of the pre-opening valve is fixedly connected to the locking nut. A connecting nut is located above the locking nut. The upper end of the pre-opening valve is equipped with a medium-pressure regulating valve connecting sleeve, which is inserted into the valve disc. A through hole is located in the middle of the lower end face of the valve disc, and the pre-opening valve is located inside the through hole. A circular sleeve is located at the lower end of the valve cover, and the circular sleeve is located within the valve body. The steam inlet end of the valve body is located on one side of the circular sleeve. A bushing is located on the inner circumferential side wall of the circular sleeve, and the upper end of the valve disc is inserted into the bushing. This invention is used in 300MW steam turbines.