103 results about "Sleeve valve" patented technology

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 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.

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 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 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 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.

The invention discloses a secondary sedimentation tank sleeve valve backwash system and a backwash control method, which are characterized in that monitoring units are respectively arranged at an inlet of a sleeve valve, the bottom of a sludge deposition tank and a backwash pipeline to acquire flow, sludge concentration and pressure difference data in real time and transmit the data to a PLC (Programmable Logic Controller) control system; the PLC compares the real-time data with preset reference parameters, calculates the flow change rate, the concentration change rate and the pressure difference variable quantity, judges light blockage or heavy blockage based on a three-dimensional criterion model, and further triggers a corresponding flushing strategy, low-power pulse flushing is adopted for light blockage, full-power continuous flushing is adopted for heavy blockage, and a mud scraper is linked to accelerate; in the flushing process, parameters are monitored in real time and automatically stopped and reset after reaching the standard, and meanwhile an exception handling mechanism for sensor exception switching and repeated flushing invalid alarm is arranged. Precise judgment and stage treatment of blockage of the sleeve valve are realized, the backwashing efficiency is improved, the energy consumption is reduced, stable operation of a sludge discharge system of the secondary sedimentation tank is guaranteed, and fluctuation of effluent quality is reduced.

The utility model relates to a water segregator sleeve valve which is provided with a valve body, a valve cavity is formed in the valve body, a spherical valve element is arranged in the valve cavity, the spherical valve element is connected with a valve handle through a valve rod on the top of the spherical valve element, water stop rings are arranged on the two sides of the spherical valve element, and the spherical valve element and the valve rod are of an engineering plastic integrally-formed structural body and form a core-rod integrated valve element. A valve element protection shell wrapping the spherical valve element and the valve rod close to the top of the spherical valve element is arranged outside the core rod integrated valve element, and the valve element protection shell also wraps the water stop rings on the two sides of the spherical valve element. An annular groove is formed in the valve rod close to the top of the spherical valve element, an O-shaped sealing ring is embedded in the annular groove, and a valve rod water sealing protection sleeve tightly matched with the valve rod is arranged between the upper portion of the valve element protection shell and the valve rod close to the top of the spherical valve element. According to the water segregator sleeve valve, the advantages caused by the fact that the valve element and the valve rod are made of plastic materials are utilized, the defects caused by the plastic materials are overcome through the ingenious structural design, and finally the effects of being low in cost, high in performance and long in service life are achieved.

The application discloses an automatic bagging device for producing a cushioning air bag, which comprises an inner bag bearing table, an outer bag bearing table and a bagging platform; the inner bag bearing table is connected to the right side of the bagging platform, and the outer bag bearing table is connected to the front side of the bagging platform; the left side of the bagging platform is provided with an inner bag grabbing mechanism; the middle part of the bagging platform is provided with an outer bag conveying device; the left and right sides of the bagging platform are respectively provided with racks, and outer bag grabbing mechanisms are installed on the racks; and a sleeve valve device is further installed on the left rack. The bagging device can perfectly realize automatic bagging work, and the whole bagging process does not need manual participation, so that the labor cost is reduced, and the bagging efficiency is greatly improved.

The utility model discloses a plane inner cavity V-shaped adjusting ball valve with high scouring resistance, and relates to the technical field of ball valves. The plane inner cavity V-shaped adjusting ball valve with the high anti-scouring performance comprises a valve body and a control unit, the control unit is inserted into the inner side of the valve body, the control unit comprises a valve rod and a valve element, the surface of the valve element is coated with an anti-scouring coating, a sliding groove is formed in the top of the valve element, and an insertion hole is formed in the bottom of the valve element. According to the plane inner cavity V-shaped adjusting ball valve with the high anti-scouring performance, the operation unit is arranged, the operation unit is provided with the valve element, and the anti-scouring coating is sprayed on the surface of the valve element, so that the anti-scouring capacity of the valve element can be effectively improved, and the service life of the ball valve is prolonged; the valve rod and the rotating shaft are connected with the valve element in an inserted mode and detachably connected with the V-shaped ball body, the valve body is provided with the upper sleeving pipe and the lower sleeving pipe, the inserting valve shell is further arranged and connected with the sleeving valve shell, the valve element is convenient to disassemble and replace, and the equipment maintenance cost is reduced.

The invention relates to the technical field of gas control, in particular to a gas control valve. The main valve body is provided with an air inlet channel, an air outlet channel, an air inlet cavity and an air outlet cavity, the control valve body comprises a control cavity, the main valve element is composed of a valve rod, a first piston and a second piston, the valve rod is provided with a sealing step, a sealing sleeve is arranged between the control cavity and the air outlet cavity, the valve rod penetrates through the sealing sleeve, and an elastic piece is arranged in a mounting groove in one end of the valve rod; the air inlet cavity is provided with a pressure adjusting channel connected with the pressure adjusting cavity, the pressure adjusting cavity is provided with a pressure relief channel connected with the outside, and the device further comprises an air inlet preparation cavity, a first pushing piece, a normally-open pressure relief opening, an air leakage preparation cavity, a second pushing piece, a bottom cover, a control mechanism, a top cover and the like. According to the gas control valve, the purpose of controlling the gas control valve through gas is achieved by reasonably designing all the cavities, the channels and the components.

The application discloses a negative pressure driving type normally closed pinch valve, which comprises a valve body, a valve cavity is arranged in the valve body, a tubular valve component and a plunger element are arranged in the valve cavity, a valve sleeve is arranged on the valve body, an annular air cavity is arranged in the valve sleeve, a negative pressure port and a pressure relief port are arranged at two ends of the valve body, a tension piston is threadedly connected to one end of the transmission sleeve which faces the negative pressure port, a pushing part is arranged at the other end of the transmission sleeve which faces the pressure relief port, the valve body is provided with a step, a compression spring is arranged between the transmission sleeve and the step, a sealing connecting piece is arranged between the tension piston and the end surface of the valve body, and the sealing connecting piece comprises a rigid connecting sleeve and a flexible bellows sleeve. The sealing connection between the rigid connecting sleeve and the flexible bellows sleeve, the sealing connection between the rigid connecting sleeve and the tension piston and the sealing connection between the flexible bellows sleeve and the valve body eliminate the gap between the tension piston and the valve body, and the stability and reliability of the transmission sleeve in operation are improved.

The utility model discloses a kind of prevention and control reinforcing structure of shield segment floating, for the construction of tunnel, the inner wall of tunnel is connected by multiple shield segments, including several sleeve valve pipes, several sleeve valve pipes are fan-shaped and arranged on shield segment;It further includes detection assembly, the detection assembly is set between the two adjacent shield segments, detection assembly includes detection rod and the measuring piece being set on detection rod, and measuring piece is used to measure the relative inclination angle between the two adjacent shield segments. Diffusion type one-way grouting is carried out through the pipe wall hole of sleeve valve pipe, the sleeve valve pipe outer wall and the soft soil layer of the annular area can be combined into one after slurry solidification, to prevent segment floating. The inclination angle of sleeve valve pipe is detected by detection assembly, when the relative inclination angle between the two adjacent shield segments reaches preset inclination angle, sleeve valve pipe can inject mud again between corresponding shield segment and the inner wall of tunnel, to accurately inhibit the floating of shield segment.

The application relates to the technical field of plug valves, in particular to a wear-resistant round plug valve, which comprises a first valve cover, a valve core plate fixedly installed on the first valve cover, and a valve core main body rotatably installed in the valve core plate. One end of the valve core main body is fixedly connected with a second return spring, one end of the second return spring is fixedly connected with a rotating disc, and the outer wall of the rotating disc is fixedly connected with a first guide rod and a second guide rod. The application has the beneficial effect that when the rocker is rotated, the first bevel gear is rotated, the moving disc is rapidly moved, the second sleeve and the second ball are slid along the limiting track, until the second ball is slid to the end of the limiting track. Because the sliding is rapid and instantaneous, when the second ball is slid to the end of the limiting track, the limiting track and the first sleeve and the valve core main body are knocked and vibrated, so that the residual particles in the valve core main body are dropped or removed from the adhering state through the conveying groove.

The invention relates to the technical field of electromagnetic valves, and provides a direct-acting buffer electromagnetic valve which comprises an electromagnetic valve body, and the electromagnetic valve body comprises a sleeve, a valve element and a push rod. The valve element is installed in the installation groove in a sliding mode, a communicating groove used for communicating with the liquid outlet is formed in one end of the valve element, and a communicating hole used for communicating with the liquid inlet is formed in the side wall of the valve element. A pressure feedback cavity is formed in the sleeve and communicates with the sliding groove through the connecting groove. The push rod is slidably installed in the pressure feedback cavity, one end of the push rod penetrates through the connecting groove and is connected with the valve element, and the sleeve is provided with an electromagnetic assembly used for driving the push rod to slide; the valve element is provided with a first feedback channel communicating with the communicating groove, and the push rod is provided with a second feedback channel used for communicating the pressure feedback cavity with the first feedback channel. According to the direct-acting type buffering electromagnetic valve, the situation that a driving motor is damaged can be reduced, and the service life of an excavator is prolonged. The invention further provides a hydraulic system.