6011 results about "Valve stem" patented technology

The invention discloses a use monitoring method and system for a knife gate valve, and relates to the technical field of knife gate valve monitoring, and the method comprises the steps: integrating a multi-mode sensor array at the root of a valve rod of the knife gate valve, an adjacent region of a sealing surface and in a valve cavity flow channel, and collecting multi-source signals in real time; performing dynamic fusion processing on the multi-source signal, and determining a feature extraction algorithm combination based on the current valve rod temperature and historical working condition data to extract a sealing surface damage feature, a transmission chain wear feature and a particle impact feature; constructing a dynamic anomaly judgment model, updating a clustering boundary of a vibration and torque characteristic space in real time, and performing decoupling diagnosis on a sealing surface dry friction risk, thread clearance expansion and gear wear in combination with time-frequency domain fluctuation analysis of a gear meshing frequency harmonic attenuation rate and an angular acceleration; and generating a three-level maintenance strategy according to the diagnosis result, dynamically adjusting the output torque of the execution mechanism and optimizing the switching frequency of the valve.

A cage-type dual wedge throttle valve, comprising: a housing having an inner cavity; a valve cover arranged at the top of the housing; a valve seat arranged in the inner cavity, wherein the valve seat comprises an outer valve seat and an inner valve seat, and a plurality of flow holes are distributed on the peripheral wall of the outer valve seat; a valve core, which comprises two wedge-shaped surfaces and two cylindrical surfaces which are axially symmetrically arranged about the central axis, wherein the cylindrical surfaces face the direction in which a fluid flows into the inner cavity, and the cylindrical surfaces can fit the inner wall of the inner valve seat; and a valve stem having the two ends respectively connected to a driving device and the valve core, wherein under the driving of the driving device, the valve stem can drive the valve core to reciprocate in the valve seat in the axial extension direction of the valve stem. By means of the above solution, primary throttling is achieved when a fluid passes through the outer valve seat, and secondary throttling is achieved as the valve core gradually extends into the inner valve seat; moreover, the valve core comprises wedge-shaped surfaces, and a long throttling stroke is formed, thereby improving the throttling switching performance of the throttle valve; the symmetrical arrangement of the two wedge-shaped surfaces can balance the pressure on the two sides, thereby improving the stability of the valve core under force.

The invention relates to the technical field of butterfly valves, in particular to an eccentric butterfly valve which comprises an eccentric valve body, a butterfly valve plate, a valve rod, a movable brake block and a transmission assembly, a water flowing cavity is formed in the eccentric valve body, the valve rod is rotationally installed on the eccentric valve body, the butterfly valve plate is rotationally installed on the valve rod, a sealing ring is fixedly installed on the butterfly valve plate, and the movable brake block is fixedly installed on the sealing ring. The sealing ring is attached to the water flowing cavity, two through holes are formed in the butterfly valve plate, two movable brake blocks corresponding to the through holes are installed on the butterfly valve plate in a sliding mode, and the transmission assembly is connected with the valve rod and the movable brake blocks at the same time. The through hole is formed in the butterfly valve plate, the movable brake block corresponding to the through hole is arranged, the movable brake block is controlled to change the opening and closing state of the through hole, impact force borne by the two sides of the butterfly valve plate from liquid when the butterfly valve plate rotates to open the water flowing cavity is reduced, the service life of the butterfly valve plate is prolonged, and the maintenance frequency of the eccentric butterfly valve is reduced.

The invention discloses an intelligent gas valve remote control and early warning system based on the Internet of Things, and relates to the technical field of valve monitoring. The valve processing module is used for preparing an intelligent valve through 316N stainless steel subjected to grain boundary processing, and a sealing ring, a fiber grating array and a QCM sensor are arranged on the intelligent valve; and the intelligent control module is used for acquiring the strain size of the fiber bragg grating and vulcanized film data through the fiber bragg grating array and the QCM sensor, and determining the lubricant release amount and the current regulation density. Strain of the valve rod is monitored in real time through the fiber bragg grating array, segmented friction force is obtained, and a nano lubricant is automatically released according to the friction force, so that the friction coefficient can be reduced, flexible opening and closing of the valve are ensured, and meanwhile, the surface density change of a vulcanized film is detected through the QCM sensor; and the valve rod is automatically triggered to rotate for self-cleaning or electrolytic polishing treatment, so that corrosion development can be effectively inhibited.

The present technology relates to an automatically locking, releasable, safety knob assembly for a stove. The assembly includes a base with a locking notch. An adapter mates with the stove's valve stem and has a head, a tubular middle section, and an adapter base with a central aperture for receiving the valve stem. The knob includes a housing with a housing disk covering the base, an arm movement channel aligned with the locking notch in the locked configuration, and a central aperture for receiving the adapter head. The assembly further includes a sub-assembly with a slidable button allowing free rotation of the knob in the unlocked configuration, an automatic locking arm biased with the slidable button, and engagement of the button causing the arm to disengage from the locking notch and move in the arm movement channel, enabling the knob to freely rotate and rotate the valve stem.

The invention discloses a special working condition corrosion-resistant valve and relates to the technical field of valves, the special working condition corrosion-resistant valve comprises a valve body, a valve rod, a butterfly plate and a transmission device, and a valve seat containing cavity is defined by a limiting ring and a valve seat gland in the valve body on one side of the butterfly plate; a valve seat which can only slide in the axial direction of the valve body slides in the valve seat containing cavity in a sealed mode, and the whole valve seat is completely contained in the valve seat containing cavity. A metal sealing ring is fixedly installed on the outer periphery of the butterfly plate, and a valve seat sealing face matched with the metal sealing ring in a sealing mode is arranged on the inner side of the valve seat. And an elastic element is arranged between the valve seat and the valve seat gland. According to the three-eccentric butterfly valve, through the collaborative design of the three-eccentric structure, the hidden valve seat, the L-shaped fluid channel and the self-adaptive plugging assembly, the advantages of the three-eccentric butterfly valve are reserved, the defect of exposed design of a traditional valve seat is overcome through structural innovation, and it is ensured that the valve is accurate in action and reliable in sealing in the opening and closing process; and the sealing structure is particularly suitable for special working conditions with strict requirements on sealing performance and service life.

The invention particularly relates to a double-sealing special-shaped ball valve which comprises a valve body, a valve rod rotating and lifting operation mechanism movably installed at the top of the valve body and a connector arranged at the bottom end of the valve rod rotating and lifting operation mechanism. A notch is formed in the top of the special-shaped ball valve clack movably installed in the valve body and can be tensioned, a thin-layer slotting plate part is arranged at the bottom of the special-shaped ball valve clack, deformation is easier, a side through opening is formed in the middle of the special-shaped ball valve clack and used for switching rapid water passing, and therefore the whole structure is an inverted-C-shaped special-shaped ball, and the special-shaped ball valve has the high opening and contracting functions. The left side and the right side of the special-shaped ball valve clack shrink and deform towards the middle portion, the two inclined holes close the notch in the top of the special-shaped ball valve clack, so that the second sealing gasket is separated from the first sealing gasket, and at the moment, in the whole rotating opening and closing process of the valve, the second sealing gasket of the special-shaped ball valve clack and the first sealing gasket of the connecting pipe do not rub; the service life is long.

The invention belongs to the technical field of valve maintenance, and particularly relates to a lifting device for a leakage guide ring of a nuclear island gate valve. The upper end of the supporting screw rod is arranged on a valve yoke frame, the lower end of the supporting screw rod is arranged on the drawing support, the drawing support is installed on a valve rod, the half-and-half type lifting nut is installed at the position of a threaded sleeve at the bottom end of the drawing support in a spliced mode and connected with the threaded sleeve through the set screw, and the half-and-half type lifting loop is connected to the lower end of the lifting nut in a hung mode. The lower end of the lifting screw rod is screwed into the original lifting hole and the new lifting hole of the leakage guiding ring, the height of the lifting loop is adjusted in a rotating mode, the upper end of the lifting screw rod is arranged in a screw hole of the lifting loop and is screwed and fixed through a nut, and the operating handle and the rotation preventing handle are arranged in the lifting nut and operating holes in the periphery of the lifting loop respectively. And the drawing bracket is fixed by connecting the original bolt hole of the valve with the supporting screw rod. On the premise of fully considering the limited operation space, the leakage guiding ring is efficiently detached, meanwhile, the complete effect of the leakage guiding ring is guaranteed, and the leakage guiding ring can be repeatedly used.

The invention belongs to the technical field of gate valves, and particularly relates to a scouring-resistant and corrosion-resistant gate valve which comprises a valve body, a valve cover is fixedly mounted on the valve body, a control component is arranged in the valve cover and controls a valve rod to rotate in the valve cover, the lower end of the valve rod is in threaded connection with a gate plate, and the gate plate slides in the valve body and the valve cover. The supporting component is arranged on the outer side of the valve body, the valve rod is controlled to rotate through the control component, the valve rod drives the gate plate to ascend or descend, then the gate valve is opened or closed, fluid is controlled to be conducted or blocked, and a ceramic sealing face is arranged at the joint of the interior of the valve body and the gate plate and has a certain corrosion-resistant effect. The filtering part arranged in the valve body can intercept and filter impurities in fluid, the corrosion resistance of the gate valve is further improved, in addition, the filtering part has the effect of reducing the flow speed of the fluid, impact of the fluid on the gate plate is reduced, and the valve body can be fixed to the ground or a building through the supporting part arranged on the outer side of the valve body. And the pressure of the gate valve on the pipeline is reduced.

A valve spring made of plastic, in particular for pretensioning a valve stem against a valve seat of a dispensing unit for dispensing a preferably liquid product, is proposed, wherein the valve spring has a plurality of spring elements arranged axially one behind the other, in particular along an axis or longitudinal axis. According to a first aspect, each spring element has two curved portions which are formed mirror-symmetrically with respect to one another and are connected to one another at their ends. According to a further aspect, the valve spring has a leaf-spring-like or cup-spring-like construction.

The invention discloses a nuclear power stop valve capable of reducing friction, and relates to the technical field of stop valves. According to the nuclear power stop valve capable of reducing friction, through the design of a composite mechanism, the valve rod is rotated by the hand wheel to drive the valve clack to ascend, a gap is formed between the valve clack and the ring-shaped groove in the surface of the baffle so that liquid can flow conveniently, on the contrary, the valve clack and the ring-shaped groove are in butt joint, the effect of stopping fluid is achieved, and then the fluid flow can be controlled so that the working requirement can be met; the valve clack is in friction fit with the friction mechanism in the lifting process, so that the effect of cleaning components is achieved, impurities on the surfaces of the components are reduced, corrosion caused by too many impurities or the situation that the sealing effect is affected by too many impurities is prevented, protection mechanisms are arranged on the two sides of the valve body shell, and the protection mechanisms are placed on the inner sides of the pipelines on the two sides, so that friction force to the pipelines is enhanced; the sealing effect is improved, aging leakage of the two sides of equipment is prevented, friction of liquid to parts is reduced, equipment abrasion is reduced, and therefore the service life of the equipment is prolonged.

The invention discloses a stop valve, and relates to the field of valves. A stop valve comprises a valve seat, a valve cover, a support, a lead screw and a sealing valve column, the liquid inlet end and the liquid outlet end of the valve seat are fixedly connected with liquid conveying pipelines on the two sides through flange plates and bolts respectively, the valve cover is fixedly installed on the valve seat through bolts, the support is fixedly installed on the valve cover, the sealing valve column is arranged in the valve seat, and the lead screw is fixedly installed on the support. The lead screw is fixedly connected to the upper end of the sealing valve column, the upper end of the lead screw upwards penetrates through the valve cover, and the double-opening sleeve is rotationally connected to the support; the operation difficulty of resisting fluid pressure when the valve is opened manually is effectively reduced, the downward pressure of fluid becomes assistance during closing, a worker only needs to reversely rotate the rotating wheel to achieve smooth downward movement of the sealing valve column, operation is convenient and fast, tighter sealing can be achieved through the fluid pressure, and the reliability after the valve is closed is improved.

The invention discloses a pneumatic control valve with toughness, relates to the technical field of valves, and aims to solve the problem that a valve rod of an existing pneumatic control valve does not have a self-repairing function. According to the pneumatic control valve, at least part of a rod section, located in a flow channel of a valve body, of a valve rod is arranged to be a tough rod section, and the tough rod section is mainly composed of a rod section body, a first rod barrel and a second rod barrel, wherein the rod section body is sleeved with the first rod barrel and the second rod barrel which are coaxially connected through a first flexible structure; when the pneumatic control valve works normally, the rod section main body of the tough rod section is mainly used for power transmission, and when the rod section main body of the tough rod section is broken after the valve rod is seriously impacted, the first rod barrel and the second rod barrel which are connected through the first flexible structure can replace the rod section main body for power transmission, so that the function of the tough rod section is automatically recovered; self-repairing of the valve rod is achieved, and it is ensured that the pneumatic control valve can rapidly recover to work normally.

The full-flow low-flow-resistance quick connector comprises a main shell and a valve element rotationally arranged in the main shell, a valve element flow channel is formed in the valve element, the valve element is connected with a rotating valve rod driving the valve element to rotate, an interlocking connecting piece is arranged at the head end of the main shell, and the interlocking connecting piece is connected with the valve element flow channel. The locking pin is installed in the sliding cavity of the main shell in a telescopic mode, and the head end of the locking pin can penetrate through the interlocking connecting piece and be exposed out of a pin hole of the interlocking connecting piece. When the valve core rotates to a valve closing state, the head end of the locking pin is allowed to be pressed down after being pressed, so that the head seat interlocking connecting piece is allowed to be unlocked; when the valve element rotates to the state that the valve is not closed, the head end of the locking pin is not allowed to be pressed down after being pressed, so that the head seat interlocking connecting piece is not allowed to be unlocked, the head seat cannot be separated, the locking pin locks the locking clamping clack so that the locking clamping clack cannot rotate relatively, the head seat cannot be separated, and the connecting state is stable and reliable.

The utility model provides a self-positioning and antifouling flat gate valve which comprises a valve body, a valve cavity and a medium channel communicated with the valve cavity are arranged in the valve body. A left valve seat and a right valve seat are arranged at the intersection of the medium channel and the valve cavity, a gate plate is connected between the left valve seat and the right valve seat, the gate plate is matched with the left valve seat and the right valve seat in a sealing mode, and the gate plate is driven by a valve rod to move up and down. A spring hole is formed in the position, in axial contact with the valve body, of the valve seat, and a spring is installed in the spring hole. A positioning block is arranged in the valve body and is coaxial with the gate plate in the longitudinal direction, and a positioning groove matched with the positioning block is formed in the bottom of the gate plate. And the scraping plate is installed in the valve body and arranged at the upper end of the valve seat, and the valve rod is arranged on the scraping plate in a penetrating mode. The spring is arranged at the axial contact position of the valve seat and the valve body, sealing of the valve seat and the gate plate is kept, abrasion to the sealing face of the valve seat is reduced, and the service life of the gate valve is prolonged. And the scraping plate removes dirt on the surface of the gate plate, and the sealing performance of the gate valve is improved.

The servo valve comprises an outer shell, a valve assembly is arranged in the outer shell, the valve assembly is connected with a nested antler channel, and the nested antler channel is used for being connected with hydraulic equipment; the valve assembly comprises a rotary valve rod, a valve element and a valve sleeve, the axis of the rotary valve rod is perpendicular to the axis of the valve element, the valve element is coaxially and movably arranged in the valve sleeve, the bottom of the rotary valve rod is connected with a crankshaft, the crankshaft is sleeved with a first bearing, and the valve sleeve is arranged in the nested antler channel. A plurality of through holes used for being communicated with the nested antler channels are formed in the valve sleeve in the axial direction of the valve sleeve, a movable groove matched with the crankshaft is formed in the middle of the valve sleeve in the radial direction, a kidney-shaped mounting hole matched with the first bearing is formed in the valve element, and the length direction of the kidney-shaped mounting hole is perpendicular to the axial direction of the valve element. And at least one annular sleeve is fixedly arranged on the valve element and located on the two sides of the mounting hole in a sleeving mode, the annular sleeves are used for blocking the through holes in different positions, and the valve rod has the advantages that abrasion of the valve rod is reduced, and the service life is prolonged.

The present invention relates to the technical field of hand pump, in particular to a novel single-material hand pump, which includes a pressure head, a valve stem, an elastic part and a cylinder, wherein the bottom of the pressure head is fixedly connected with the valve stem, the cylinder is arranged at the bottom of the valve stem, the valve stem is connected with the cylinder in an embedded way, not only the elliptical columns contract uniformly under pressure and have good resilience, but also the elastic part is made of elastoplastic, the separate removal of metal spring is not required for saving the treatment time and improving the environmental protection, and the air holes are used for absorbing or discharging the compressed air inside the elastic part, thereby solving the problems of internal negative pressure, failure to reset the elastic part and retract the elastic part.

The present invention relates to the technical field of valves, and disclosed is a butterfly valve for use in ultra-low temperature environment. The butterfly valve comprises a valve body (1), a butterfly disc (2) in the valve body (1), a valve seat (3) matching with the butterfly disc (2), a valve stem (4) fixed to the butterfly disc (2), and an operating assembly (5) for driving the valve stem (4) to rotate, wherein a manhole (11) and an observation cover (12) covering the manhole (11) are provided on the valve body (1), and the observation cover (12) is detachably connected to an outer edge of the manhole (11) on the valve body (1); a cleaning assembly (6) is provided on an outer side face of the valve body (1), and the cleaning assembly (6) comprises a cleaning member (61) located above the observation cover (12) and a driving member (62) for driving the cleaning member (61) to slide back and forth on an upper side face of the observation cover (12); and an operating wheel (51) rotates to drive the driving member (62) to operate, and one side of the cleaning member (61) abuts against the upper side face of the observation cover (12), which reduces the difficulty of maintenance of the butterfly valve and improves the efficiency of maintenance of the butterfly valve. In addition, the rotation of the operating wheel (51) can drive the driving member (62) to operate, which in turn drives the cleaning member (61) to clean an outer surface of the observation cover.

The invention provides a high-temperature-resistant and high-pressure-resistant chemical pipeline corrugated pipe sealing ball valve and relates to the field of valves, the high-temperature-resistant and high-pressure-resistant chemical pipeline corrugated pipe sealing ball valve comprises a valve body, a valve seat assembly, a ball body and a valve rod, an upper valve cover is arranged above the valve body, a first inlet and a first outlet are formed in the valve body in the axial direction, and a first through hole is formed in the ball body; the first inlet, the first through hole and the first outlet form a medium flow channel, a first cooling cavity is formed in the valve body corresponding to the lower end of the ball body, a second cooling cavity is formed in the valve body corresponding to the valve seat assembly, a third cooling cavity is formed in the upper valve cover in the axial direction of the valve rod, and a communicating pipeline is arranged between the second cooling cavity and the third cooling cavity. The communicating pipeline is provided with a liquid inlet connector, the communicating pipeline, the first cooling cavity, the second cooling cavity and the third cooling cavity are communicated to form a cooling flow channel, and the cooling flow channel is not communicated with the medium flow channel. The ball valve is provided with the cooling flow channel, so that the ball valve can play a self-compensation function of the corrugated pipe valve seat and can be effectively protected from being damaged, and the sealing performance of the valve rod and the upper valve cover is good.

The invention relates to the technical field of fluid control and management, in particular to a multi-stage pressure and noise reduction regulating valve which is characterized in that a fluid channel is arranged in a valve body and comprises a fluid outlet and a fluid inlet; the valve seat comprises a multi-layer valve cylinder and a first opening, a first throttling hole is formed in the multi-layer valve cylinder, and the first throttling hole communicates with the fluid inlet; the valve cage is fixedly connected with the valve seat and comprises a multi-layer valve wall and a first through hole, one end of the first through hole is connected with the first open hole, and the multi-layer valve wall is provided with a second throttling hole communicated with the fluid outlet; the valve cover is fixedly connected with the valve body; the valve plug is slidably arranged in the cavity; the valve rod is fixedly connected with the valve plug and arranged in the second through hole in a sliding mode. The valve cylinders and the valve walls are each provided with three layers, the first throttling holes in every two adjacent valve cylinders are arranged in a staggered mode, and the second throttling holes in every two adjacent valve cages are arranged in a staggered mode. Through the multiple layers of valve cylinders and the staggered throttling holes in the valve wall, the frequency of bubble formation and collapse is reduced, and fluid noise and the erosion risk of equipment are reduced.

The present invention relates to the technical field of ball valves, and discloses a multi-stage sealed hydrogen ball valve, which includes a valve seat, a valve core and a valve stem. The valve core is arranged inside the valve seat. Among them, a first support is fixed on the valve seat, a second support is arranged above the first support, and the first support and the second support are connected by a plurality of first connecting rods. A third support is arranged above the second support, and the second support and the third support are connected by a plurality of second connecting rods. Through the cable, the sliding plug and the annular bladder linkage mechanism, the present invention actively controls the separation of the sealing seat and the valve core before the valve core rotates, eliminates the frictional loss generated by direct contact during the opening and closing process of the traditional hard sealing structure. The sealing seat only contacts when the valve is closed, and there is no relative movement during the daily adjustment process, significantly prolonging the service life of the sealing component.

The present invention relates to a high-performance pneumatic metal-sealed high-frequency ball valve, which belongs to the technical field of ball valves. It includes a valve body, a valve stem, a valve core and a stroke mechanism. The stroke mechanism is used to drive the valve stem to rotate. The valve core is located in the valve body, and the valve core is fixedly connected to one end of the valve stem away from the stroke mechanism; a valve seat is slidably arranged in the valve body, and the valve seat is located between the valve core and the inner wall of the valve body, and the valve seat moves in the direction away from or close to the valve core; a first dust seal ring, an elastic element and a sealing ring are arranged between the valve seat and the valve body, and the first dust seal ring and the sealing ring are both annularly sleeved on the outer wall of the valve seat, the inner wall of the first dust seal ring is fixed to the valve seat, the outer wall of the first dust seal ring abuts against the inner wall of the slide groove, the outer wall of the sealing ring is fixedly connected to the inner wall of the slide groove, the inner wall of the sealing ring abuts against the outer wall of the valve seat, and the elastic element is located between the first dust seal ring and the sealing ring. The present invention has the effect of preventing powder in the medium from entering between the valve seat and the valve body to form self-aggregating blocks, thereby extending the service life of the ball valve.

The invention discloses an adjustable critical flow injection allocation valve suitable for a thermal production well and a regulation and control method of the adjustable critical flow injection allocation valve. The technical problems that the tool preparation efficiency is low and the like are solved. The device comprises a supporting body, a plurality of mounting grooves are formed in the supporting body, a steam injection valve is arranged in at least one mounting groove, sealing plugs are arranged in the other mounting grooves respectively, an annular steam flow channel is formed in the inner wall of the supporting body, and the mounting grooves communicate with the steam flow channel; the steam injection valve comprises a valve body, a Venturi nozzle, a valve rod, a limiting part and a reducing part, step faces with the outer diameters sequentially reduced from top to bottom are formed on the surface of the reducing part, the different step faces are aligned to the pore throat face by adjusting the position of the valve rod, the area of an annular flow channel can be adjusted, and therefore the injection allocation amount is adjusted. According to the injection allocation valve, the injection allocation amount can be adjusted, secondary punching machining does not need to be conducted on parts, nozzles of multiple specifications and sizes do not need to be prepared either, the tool preparation efficiency is improved, and therefore the operation time efficiency is improved.

The utility model is suitable for the technical field of blow-down valves, and provides an adjustable blow-down valve which comprises a valve body and a driving piece arranged on the valve body, a valve rod is arranged at the output end of the driving piece, the driving piece drives the valve rod to vertically move up and down, and a valve element is arranged at the bottom of the valve rod. The friction set is arranged in the valve body and comprises a vertical rod fixedly connected to the valve rod, a transverse rod arranged in the valve body and a friction plate connected to the valve body in a sliding mode, the transverse rod is sleeved with a sliding block, a connecting rod is hinged between the sliding block and the vertical rod, the vertical rod and the transverse rod are both connected to the valve body in a sliding mode, the transverse rod is sleeved with a main elastic piece, and the main elastic piece is connected with the friction plate in a sliding mode. The main elastic piece abuts against the sliding block. The blow-down valve has the advantages that the valve element can be driven by the driving piece to move up and down, and the blow-down valve can be rapidly opened or closed; and a sealing groove of the valve element and the valve body can be cleaned through the friction set, and the problem that sealing is not tight due to the fact that much dirt exists in the sealing groove is solved.

The utility model discloses an anti-loosening sealing diaphragm valve which comprises a valve body, a valve cover, an actuator, a valve cavity, a valve rod, a flow channel, a valve clack and a diaphragm. An inner shell is arranged in the valve cavity, an inner sliding block which is limited in the inner shell and slides in the horizontal direction is arranged in the inner shell, an embedded block is fixedly arranged at the left end of the inner sliding block, an embedded groove is formed in the right end of the valve rod, and when the flow channel is cut off by the valve clack, the embedded groove is just located on the left side of the embedded block. A driving spring for providing driving force for the embedded block to be embedded into the embedded groove is arranged in the inner shell; and an inclined guide contact surface is arranged on the embedded block. The utility model has the following advantages and effects: the inner sliding block can keep moving leftwards under the driving force of the driving spring, and then can push the embedded block to be embedded into the embedded groove of the valve rod, so as to lock the valve rod; longitudinal reciprocating offset of the valve rod is avoided, and the sealing performance of the valve clack is improved.

The ultra-high-temperature water-cooling switch valve comprises a valve body, a valve cover, a support, an actuator, a valve rod, a valve clack and a valve seat, an inlet flow channel, a middle cavity and an outlet flow channel which are sequentially communicated are formed in the valve body, a shaft hole is formed in the valve cover, and the valve rod penetrates through the shaft hole and extends into the middle cavity to be connected with the valve clack. The outer end of the valve rod is connected with the output end of the actuator, and the valve seat is installed between the outlet flow channel and the middle cavity and used for being in sealing fit with the valve clack when the valve is closed. An opening and closing piece cooling structure is arranged on the valve clack and the valve rod, a valve seat cooling structure is arranged on the valve seat, an inlet cooling structure is arranged in the inlet flow channel, a middle cavity cooling structure is arranged in the middle cavity, an outlet cooling structure is arranged in the outlet flow channel, and a valve deck cooling structure is arranged on the valve deck. Multiple cooling loops are adopted for cooling all parts of the valve, structural failures such as deformation caused by thermal barrier cold contraction under the alternating working condition are prevented, and normal operation of a valve pressure-bearing shell and a sealing element under the ultra-high-temperature working condition is guaranteed.

The invention relates to the technical field of gate valve equipment, and discloses a meter-front copper gate valve with a magnetic lockable structure, which comprises a valve body which is used as a basic component of the whole device and is used for assembling and bearing all mechanisms and subordinate lower structural parts; the valve basic mechanism is arranged on the valve body and used for being matched with other structural parts to execute basic operation treatment of the valve; and the locking protection mechanism is arranged at the upper part of the valve body. By adding and arranging an extreme protection mechanism, under the extreme working condition, a thermosensitive alloy sleeve of the mechanism expands in a high-temperature environment to push a locking pin rod to be inserted into a valve rod locking hole, a valve rod is mechanically locked, and fluid leakage caused by high-temperature damage of the valve under the extreme conditions such as a fire disaster is prevented; after the temperature is reduced, the pin rod is automatically reset, locking is relieved, follow-up normal operation is not affected, the valve body can be actively protected under the extreme working condition through the treatment mode, and the accident risk is prevented from being increased due to valve failure.

A deep sea ball valve with an improved valve seat sealing system comprises a valve body, a valve rod, a valve element, a valve seat box and a valve seat matched with the valve element, the valve seat comprises a supporting ring, the supporting ring comprises a sealing face used for being matched with the valve element in a sealing mode, and the sealing face comprises an upper sealing angle and a lower sealing angle. The upper sealing angle is used for supporting the valve element and forms sealing with the valve element, the lower sealing angle is in clearance fit with the valve element when the valve is opened and is in interference fit with the valve element when the valve is closed, compared with one sealing, the upper sealing angle and the lower sealing angle are safer, spherical dirt is wiped away in the opening and closing process of the upper sealing angle, and the sealing effect is better. The lower sealing angle is protected, sealing is more durable, the sealing angle does not make contact with the valve element when the valve is in a normally-open state, the problem of material fatigue is avoided, and the problem of root leakage of an original sealing ring is solved through the integral design that the supporting ring and the sealing face are combined into one.

The invention discloses an intelligent pressure regulating and metering pry, and belongs to the technical field of pressure regulating and metering pry. Comprising a base; the skid-mounted component and the valve bodies are arranged on the base, the valve bodies are fixedly connected and communicated with the skid-mounted component, the valve bodies are in sealed sliding connection with valve rods, and the valve rods are in sealed sliding and rotating connection with sealing blocks; the sealing blocks are fixedly connected with first connecting pieces, the multiple sliding frames slide on the first connecting pieces of the adjacent sealing blocks respectively, the sealing blocks are fixedly connected with first sealing rings, and the multiple sliding frames located on the first connecting pieces of the same sealing blocks are jointly and fixedly connected with rubber rings. Solid particles located at the attaching position of the first sealing ring and the valve body are pushed to the outside in advance, then the first sealing ring and the valve body are attached to complete plugging, and the situation that the first sealing ring cannot be completely attached to the valve body due to the solid particles, and the sealing effect is reduced is avoided.

The utility model relates to the technical field of valves, in particular to a pressure holding and releasing valve with a shock absorption function, which comprises a valve body, a valve cover, a pressure releasing guide valve, a valve rod, a main valve clack, a reset spring and a buffer mechanism, and adopts a mode of buffering rebound of the valve rod to effectively relieve impact force of the main valve clack on the valve body, reduce vibration frequency of the valve and peripheral pipelines and improve safety of the valve. The service life of the valve and the pipeline is prolonged, the sealing performance of the valve body is guaranteed, and the technical problem that the service life of the pressure maintaining and releasing valve and the peripheral pipeline is easily affected by vibration generated by frequent opening and closing conversion of the valve in the prior art is effectively solved.