56 results about "Sleeve valve" patented technology

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 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 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 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 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.

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 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 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.

The invention relates to the technical field of plug valves, in particular to a wear-resistant round spin valve which comprises a first valve deck, a valve element plate fixedly installed on the first valve deck and a valve element body rotationally installed in the valve element plate, one end of the valve element body is fixedly connected with a second reset spring, and one end of the second reset spring is fixedly connected with a rotating disc. The device has the beneficial effects that a rocker rotates to drive a first bevel gear to rotate, a movable disc quickly moves to drive a second sleeve and a second ball to slide in a limiting rail until the second ball slides to the tail end in the limiting rail, and the second sleeve is driven to rotate along with the first bevel gear; and due to the fact that sliding is rapid and instant, when the second ball slides to the tail end of the limiting rail, certain knocking and trembling are caused to the limiting rail, the first sleeve and the valve element body integrally, and after the valve element body is knocked and trembled, residual particles in the valve element body fall off through the conveying groove or the adhesion state is relieved.

The present application belongs to the technical field of underground continuous wall construction, and discloses a complex stratum underground continuous wall joint pre-grouting reinforcement construction method, in order to solve the problems of long construction period, high cost and poor stratum adaptability of the existing underground continuous wall joint anti-seepage treatment method. The present application comprises positioning and setting out of guide walls, joints and grouting holes according to the survey report and design drawings; the grouting holes comprise first grouting holes, at least one group of second grouting holes and at least one group of third grouting holes, and then the first grouting holes, the second grouting holes and the third grouting holes are grouted and reinforced by using sectional grouting. The present application has the advantages of adapting to local conditions and flexible adjustment, and is suitable for super-deep underground continuous wall construction under various stratum conditions. The present application makes full use of the advantages of sleeve valve pipe grouting, and the grouting amount is accurately controllable, which can significantly improve the engineering benefit.

This invention discloses a floating compensation type balancing valve, belonging to the field of balancing valve technology. It includes: a valve body having a receiving cavity; a sleeve and a plug, respectively disposed at both ends of the receiving cavity and connected to the valve body to enclose the receiving cavity and form a balancing valve chamber; a valve core axially movable within the balancing valve chamber; a balancing valve sleeve disposed within the balancing valve chamber, with the valve core passing through it, and the balancing valve sleeve having a clearance fit with the sleeve and the inner wall of the valve body; a control piston sleeve disposed within the balancing valve chamber, with a clearance fit between the control piston sleeve and the inner wall of the valve body; and a control piston axially movable within the control piston sleeve, with a clearance fit between the control piston sleeve, the valve core, and the plug. The floating structure of the balancing valve sleeve, control piston sleeve, and control piston eliminates the misalignment problem caused by manufacturing and assembly errors, ensuring that the valve core can always move along its axis, avoiding shaking or jamming during boom luffing, and thus reducing hysteresis.

The utility model belongs to the field of valves, and particularly relates to a cage type single-seat regulating valve with good sealing performance, which comprises a valve body, a valve cover, a pneumatic actuating mechanism and a valve core component, the valve core component comprises a valve rod, a valve core, a valve seat and a sleeve, and a metal sealing ring and a guide sealing ring are sequentially stacked in the sleeve. An elastic expansion ring is arranged in the metal sealing ring, the metal sealing ring is in sealing fit with the sleeve, the valve seat and the valve element, and the guide sealing ring is in sealing fit with the sleeve and the valve element. The structure stability of the metal sealing ring can be kept in a high-temperature environment, the metal sealing ring effectively compensates gap changes caused by thermal expansion and cold contraction through continuous pressing force, the built-in elastic expansion ring can provide continuous elastic force compensation for the metal sealing ring to adapt to different pressure changes, and the dynamic sealing performance under the high-temperature working condition is ensured.

The utility model belongs to the technical field of valves, and particularly discloses an electromagnetic valve, a valve device and gas water heating equipment. The electromagnetic valve comprises an electromagnetic mechanism, a main sleeve, a valve port frame, a valve element mechanism and a main elastic piece. The valve port frame is connected to the main sleeve, the valve port frame and the main sleeve define a containing space with a lateral opening, and a valve port coaxial with the main sleeve is formed in the end, away from the main sleeve, of the valve port frame. The first end of the valve element mechanism is inserted into the inner cavity of the main sleeve in a sliding mode, the second end of the valve element mechanism is provided with a sealing cap, and the sealing cap is located in the containing space and can open or block the valve port so that the valve element mechanism can be switched between the open state that the valve port communicates with the lateral opening and the closed state that the sealing cap closes the valve port. According to the utility model, the detection and maintenance convenience of the electromagnetic valve and the valve device can be improved, the processing and maintenance cost of the electromagnetic valve and the valve device is reduced, and the cost of gas water heating equipment is reduced.

The utility model discloses a valve with a function of preventing a switch from being rusted, and particularly relates to the technical field of valves, the valve comprises a sleeving valve shell, a switch screw rod and a limiting ring, the switch screw rod is in threaded connection with the inner wall of the sleeving valve shell, the limiting ring is fixedly connected with the upper surface of the sleeving valve shell, and the inner wall of the limiting ring is provided with a lubricating anti-rusting assembly; the lubricating anti-corrosion assembly comprises a lubricating oil pipe, a manual valve, a lower discharging pipe, a lubricating oil tank and a liquid inlet pipe. The lubricating oil pipe is fixed to the inner wall of the limiting ring, the manual valve is in threaded communication with the top end of the lubricating oil pipe, and the lower discharging pipe is fixedly communicated with the top end of the manual valve. According to the utility model, the lubricating anti-corrosion assembly is adopted, enters the lubricating oil tank through the liquid inlet pipe and is poured into the limiting ring through the lubricating oil pipe, so that lubricating oil can lubricate the outer wall of the switch screw rod, the connecting part of the switch screw rod and the sleeving valve shell is prevented from being rusted, and the lubricating oil is poured in a limiting manner, so that the anti-corrosion effect is better.

The utility model discloses a single-seat regulating valve, and belongs to the technical field of regulating valves. Comprising a valve body, a sleeve, a valve element, a valve deck and a valve rod, the sleeve is arranged in the middle of the valve body, the valve deck is arranged at the upper end of the valve body and abuts against the sleeve, the valve element is arranged in the sleeve in a sliding mode, the valve rod is connected with the valve deck in a sliding mode, and the lower end of the valve rod is fixedly connected with the valve element. The valve body is provided with a medium inlet flow channel and a medium outlet flow channel, a mounting cylindrical hole is formed in the middle of the valve body, the sleeve is arranged in the mounting cylindrical hole, and the sleeve is provided with a communicating opening used for communicating the medium inlet flow channel with the medium outlet flow channel. The valve element slides along the sleeve so as to open or close the communication opening. The utility model has the advantages of simple and compact structure, tight arrangement of a sealing structure, low possibility of fluid leakage, stable and reliable use effect, low maintenance cost and excellent safety performance.

The utility model discloses a locating device used for installing a sleeve valve pipe assembly, which comprises an installing sleeve seat, a heightening frame, a pneumatic telescopic rod and a pipe body calibration pressurization buckling unit. In the using process of the locating device, a valve pipe is tightly wrapped by a first elastic rubber ring, and when the valve pipe is inserted downwards, the first elastic rubber ring is driven to move; the first elastic rubber ring moves to generate vertical traction on the rubber sleeve part, the rubber sleeve part can be matched with the fixing ring to achieve real-time traction on the surface of the upper end of the valve pipe, vertical uniform depth control over the top of the valve pipe can be achieved under the traction body, so that the vertical insertion effect of the valve pipe is improved, the first spraying head can lubricate the surface of the valve pipe in a power-assisted guide roller area, and the spraying effect of the valve pipe is improved. The second material spraying pipes installed on the two sides of the sliding assisting liquid bin can be annularly and symmetrically arranged through the second material spraying heads, so that the second material spraying heads can conduct lubrication assisting on the surfaces of the valve pipes in the areas of the two sides of the assisting guide roller, and abrasion between the valve pipes and valve seat end sockets is reduced.

The application aims to provide an ammonia fuel integrated injector based on hydroxyl-rich combustion-supporting, comprising a liquid ammonia supply control module, a liquid ammonia injection control module and a double-fluid injection module. The application designs an electromagnetic actuator structure with a porous valve rod, so that the pressure at the upper end of the control cavity is adjustable, the quick response of the control valve is realized, and the separation of the servo oil circuit and the supply oil circuit is realized. For the injection control of ammonia fuel, a strong magnetic force electromagnetic actuator with a sleeve valve rod is designed, a direct control form of the structure is adopted, and high-response precise injection of double-fluid mixed gas is realized. In addition, the application realizes large-flow injection of ammonia fuel by adopting hydroxyl-rich gas for double-fluid injection, mixing liquid ammonia with gas by the liquid ammonia injection module, and injecting the mixture into the cylinder, and ensures the combustion effect by combustion-supporting of the hydroxyl-rich gas.

The invention discloses a sleeve valve pipe structure, a parameter determination method and a high-pressure grouting construction technology.The sleeve valve pipe structure comprises sleeve valve pipe units which are connected in a sealed mode, each sleeve valve pipe unit comprises a grouting pipe, and grouting units are evenly arranged on the grouting pipe at intervals in the axial direction; the grouting unit comprises grouting holes evenly formed in the circumference of the grouting pipe, and the grouting pipe is sleeved with an elastic valve skin used for sealing the grouting unit. The grouting pipe is sleeved with at least two centralizing rings, and the outer diameter of the centralizing rings is larger than that of the elastic valve skin. According to the sleeve valve pipe structure, the centralizing rings are additionally arranged on the two sides, corresponding to the elastic valve skin, of the grouting pipe, exclusive protection on the elastic valve skin is formed, direct friction and rubbing between the valve skin and the hole wall are effectively avoided, the replacement frequency of the valve skin in the construction process is greatly reduced, and the construction cost and the construction period delay risk are reduced.

This application relates to the field of solenoid valve technology and provides a direct-acting buffer solenoid valve, including a solenoid valve body. The solenoid valve body includes a sleeve, a valve core, and a push rod. The valve core is slidably installed in a mounting groove, and one end of the valve core is provided with a communicating groove for connecting to the outlet. A communicating hole is opened on the side wall of the valve core for connecting to the inlet. A pressure feedback chamber is provided in the sleeve, and the pressure feedback chamber is connected to the sliding groove through a connecting groove. The push rod is slidably installed in the pressure feedback chamber, and one end of the push rod passes through the connecting groove and connects to the valve core. The sleeve is provided with an electromagnetic component for driving the push rod to slide. The valve core has a first feedback channel connected by the communicating groove, and the push rod has a second feedback channel for connecting the pressure feedback chamber and the first feedback channel. This direct-acting buffer solenoid valve of this application aims to reduce the damage to the drive motor and improve the service life of the excavator. This application also provides a hydraulic system.

The invention relates to the technical field of oil field well drilling leaking stoppage devices, in particular to an isolation type feeding leaking stoppage connector. The connector comprises a connector body. The inner side of the lower end of the connector body and the outer side of the middle of the circulation conversion valve are fixedly installed together, the sliding sleeve valve and the connector body are fixedly connected together through at least one shear pin, and the inner side of the circulation conversion valve is sleeved with the lower portion of the sliding sleeve valve. The connector body, the sliding sleeve valve and the circulating conversion valve are each provided with at least one midway circulating hole which is communicated with the midway circulating hole, at least one through circulating hole is formed in the middle of the sliding sleeve valve, and at least one circulating flow channel is formed in the inner wall of the circulating conversion valve. The plugging device is reasonable and compact in structure, the plugging material is pushed into or squeezed into a leakage layer through matched use of the connector body, the sliding sleeve valve and the circulating conversion valve to achieve the purpose of rapid plugging, the contact performance of the plugging material and drilling fluid is prevented from being changed, the plugging device has the advantages of being safe, reliable and good in plugging effect, operation is convenient, and the working efficiency is greatly improved.