276 results about "Left valve" patented technology

The invention relates to the technical field of oil production engineering, in particular to a wellhead blowout prevention device which comprises a blowout prevention shell, a left valve element, a right valve element and a driving assembly, and a mounting through hole for a polish rod to penetrate through is formed in the upper end of the blowout prevention shell. The structure is reasonable and compact, when the polish rod in the mounting through hole is not in the center, the right valve element moves leftwards, the eccentric polish rod can move into the right sealing groove along the inner wall of the guide groove, the eccentric polish rod can be centralized, then the guide part moves rightwards to make contact with the guide groove in a sealed mode, and therefore the polish rod is prevented from being blocked. And finally, the left sealing groove, the guide part and the right sealing groove are close to one another to form a vertically-through cylindrical sealing hole, the outer side of the polish rod is in sealing contact with the inner wall of the sealing hole, and therefore the effect of closing the mounting through hole is achieved, and the mounting through hole can be timely and rapidly closed through the driving assembly when leakage or steam channeling blowout happens to the polish rod. The safe operation of the wellhead blowout preventer of the oil pumping unit is ensured, and the occurrence of wellhead pollution events is reduced.

The invention discloses a two-piece type knife-shaped gate valve, relates to the technical field of knife-shaped gate valves, and aims to solve the problem that in the prior art, when a gate plate is attached to a sealing strip, impurities such as silt are retained between the gate plate and the sealing strip, and the sealing effect is affected. The two-piece type knife-shaped gate valve comprises a left valve body and a right valve body fixedly connected with the left valve body through a bolt; a sealing cavity is formed between the right valve body and the left valve body, rectangular medium channels which penetrate through the left valve body and the right valve body and are communicated with the sealing cavity are formed in the outer wall of the left valve body and the outer wall of the right valve body, a first sealing rubber strip is fixedly connected to the inner wall of the sealing cavity, and a rectangular gate plate is arranged in the sealing cavity; the two sides of the gate plate are attached to the inner walls of the two sides of the first sealing rubber strip respectively. The gate valve has the advantage that the probability that the sealing performance of the gate valve is affected due to impurities is reduced.

The invention relates to the technical field of wellhead sealing, in particular to an automatic packing sealing and self-tightening system which comprises a left valve element, a right valve element, a first driving assembly, a sealing packing, a second driving assembly and a cross-shaped sealing shell. The structure is reasonable and compact, when the polish rod in the penetrating hole is not in the center, the right valve element moves leftwards, the eccentric polish rod can move into the right sealing groove along the inner wall of the guide groove, the eccentric polish rod is centralized, then the guide part moves rightwards to make contact with the guide groove in a sealed mode, and therefore the polish rod in the penetrating hole can be straightened. And finally, the outer side of the polished rod is in sealed contact with the inner wall of the sealing hole, so that the effect of closing the penetrating hole is achieved, and when the sealing packing leaks in the field, the second driving assembly presses the sealing packing through the pressing sleeve after working, so that continuous leakage of the sealing packing is prevented and stopped; when the polish rod leaks or blows out through steam channeling, the penetrating hole can be timely and rapidly closed through the first driving assembly and the second driving assembly, safe operation of the wellhead blowout preventer of the oil pumping unit is guaranteed, and wellhead pollution accidents are reduced.

The stacked type fixed differential pressure reducing valve comprises a valve body, a valve element arranged in the valve body in a sliding mode and a shuttle valve arranged at one end of the valve body, a left valve cavity is formed between one end of the valve element and the valve body, a right valve cavity spaced from the left valve cavity is formed between the middle of the valve element and the valve body, and a large-aperture oil supply channel P penetrating through the right valve cavity is formed in the valve body; the valve body is provided with a first load port A and a second load port B, the first load port A and the second load port B are communicated with the left valve cavity through the shuttle valve, and the valve element is provided with a damping structure so that the valve element can slide in the valve body in a damping mode. The large-aperture oil supply channel P is arranged, so that the device is suitable for the large-flow condition; the valve element is provided with the damping structure so that the valve element can slide in the valve body in a damping mode, the stability and precision of the pressure reducing valve can be improved, the fixed differential pressure reducing valve can move slowly even under the high pressure condition, the stability under the high pressure is further improved, and the fixed differential pressure reducing valve is suitable for the working condition of high flow.

The low-temperature ball valve comprises a valve body, a valve cavity is formed in the middle of the valve body, auxiliary sealing rings are arranged on the inner sides of the two ends of the valve body, a left valve deck and a right valve deck are detachably installed on the inner sides of the two ends of the valve body through bolts correspondingly, and valve seats are detachably installed on the outer sides of the two ends of the valve body through bolts correspondingly; a valve ball is rotationally connected to the inner wall of the valve cavity, a main sealing ring is arranged at the upper end of the valve ball, a valve rod is fixed to the middle of the upper end of the valve ball, sealing filler is arranged between the valve rod and the valve body, and a handle is detachably installed at the upper end of the valve rod through a bolt. According to the low-temperature ball valve, a worker rotates the handle to conduct rotating operation, on one hand, the supporting and sealing effects are achieved, the overall sealing performance of the low-temperature ball valve is improved, on the other hand, the automatic cleaning effect is achieved, the service life of the low-temperature ball valve is prolonged, on the other hand, the stress balance effect is achieved, and the using stability of the low-temperature ball valve is improved.

The invention discloses a water supply flow control valve, and relates to the technical field of control valves, the water supply flow control valve comprises a ball valve, the ball valve comprises a left valve body, the left valve body is connected with a right valve body through a screw, the top of the left valve body is connected with a wheel handle through a driving device, the output end of the driving device is connected with a valve rod, and the bottom of the valve rod is connected with a valve core; a sealing ring is connected between the outer ring of the valve element and the left valve body and between the outer ring of the valve element and the right valve body, the pressure relief assembly is arranged in the valve element and comprises a concentric-square-shaped groove formed in the valve element, a plurality of C-shaped grooves are formed in the valve element and communicate with the concentric-square-shaped groove, and when the valve element is rapidly closed, blocked water flow can flow along the concentric-square-shaped groove, so that the water flow is blocked. The water flow is divided into a plurality of C-shaped grooves, the divided water flow and normal circulating water flow in the concentric-square-shaped groove impact each other, part of pressure is effectively counteracted, the water flow finally flows out along the concentric-square-shaped groove, secondary impact is conducted on the water flow and the water flow about to enter the concentric-square-shaped groove, and therefore the water hammer pressure is greatly reduced.

The invention discloses a FanERC ship filling active safety disengaging device which comprises a left valve body, a right valve body and an air inlet connector, the left valve body and the right valve body are fixedly connected through a breaking bolt, a sealing cavity is formed in the connecting position after the left valve body and the right valve body are connected, and the air inlet connector is fixedly arranged on the left valve body and communicates with the sealing cavity. The gas inlet connector is connected with a nitrogen releasing device, after the nitrogen releasing device receives a releasing signal sent by the main control system, the nitrogen releasing device releases high-pressure nitrogen, the high-pressure nitrogen enters the sealing cavity through the gas inlet connector, the breaking bolt is thrusted and broken through high pressure, the left valve body and the right valve body are separated, and the left valve body and the right valve body automatically achieve self-sealing. The active separation mode does not need to depend on too large tension borne by the pipeline to break the bolt, impact and damage of the tension to the LNG conveying pipeline, the filling hose and other equipment can be reduced to the maximum extent, the LNG leakage risk caused by pipeline damage is reduced from the source, and the service life and safety of filling operation related equipment are guaranteed.

The ultrahigh-pressure axial-flow type gas pressure regulator comprises a left valve body, a middle valve body, a right valve body and a pressure regulating assembly, the left valve body is provided with a gas inlet channel, a valve clack and a guide sleeve are fixed to the right end of the left valve body in a sealed mode, the valve clack is provided with a vent hole, a pressure regulating gas channel is formed between the guide sleeve and the valve clack, and the middle valve body is connected with the left valve body and the right valve body in a sealed mode in a left-right corresponding mode. The pressure adjusting assembly comprises a piston and a valve cylinder, the piston is in sliding sealing fit with the middle valve body, the valve cylinder is fixed to the middle of the piston in a sealing mode, the left half portion of the valve cylinder is in sliding sealing fit with the guide sleeve, the right half portion of the valve cylinder is in sliding sealing fit with the right valve body, and the space between the piston and the left valve body is an inflation cavity. A space between the piston and the right valve body is a feedback cavity which is communicated with the air outlet channel; the left valve body, the middle valve body, the right valve body, the valve clack, the guide sleeve, the piston and the valve cylinder are all made of austenitic stainless steel. The device has the advantages of simple structure, safety, reliability and high practicability.

According to the floating type offshore photovoltaic and valve type wave energy device integrated system, in the system, a supporting system comprises a plurality of steel frames, and a photovoltaic power generation system comprises a photovoltaic power generation panel supported on the supporting system; the floating system comprises a buoy floating on the water surface and is arranged at the bottom of the supporting system to provide buoyancy; the mooring system comprises an anchor chain connected with a buoy, a plurality of valve type wave energy devices are arranged on the periphery of the floating type offshore photovoltaic device in a surrounding mode, and a left valve body and a right valve body are connected through a hinge shaft and can rotate around the hinge shaft. The piston rod is arranged on the left valve body and slidably connected with the hydraulic cylinder, the hydraulic control cabinet is connected with the hydraulic cylinder to convert hydraulic energy into electric energy, when waves come, the left valve body and the right valve body generate relative displacement in the vertical direction to drive the piston rod and the hydraulic rod to generate piston motion, and the hydraulic energy generated by piston motion is converted into the electric energy after passing through the hydraulic control cabinet. The system improves the stability and safety of the structure.

The invention relates to a hydraulic control valve and a hydraulic operating mechanism. The hydraulic control valve comprises an outer valve shell, a valve sleeve assembly, a valve element and a paddle. The outer valve shell is provided with a valve cavity. The valve sleeve assembly is arranged in the valve cavity and comprises a left valve sleeve and a right valve sleeve, the left valve sleeve and the right valve sleeve are provided with a left moving cavity and a right moving cavity respectively, the right valve sleeve is further provided with a first connecting cavity communicated with the right moving cavity, and the first connecting cavity is used for inputting normal high-pressure oil; the valve element is slidably assembled in the valve sleeve assembly, and the two ends of the valve element are arranged in the left moving cavity and the right moving cavity correspondingly. The paddle is arranged at one end of the valve element and located in the right moving cavity, and the paddle rotates and moves towards the left moving cavity under the acting force of the normal high-pressure oil input by the first connecting cavity so that the paddle can drive the valve element to move to the closing position on the sliding stroke. In other words, rotary motion is added on the basis of linear motion, static friction force brought by a sealing ring on the valve element is overcome in a composite mode, and then the stability of the switching-on action of the operating mechanism is improved.

The utility model discloses a double-wall continuous circulating valve which comprises a double-wall main valve body (1) with an inner-layer channel and an outer-layer channel, one layer of channel is a drilling fluid injection channel, the other layer of channel is a gas injection channel, a double-wall ball valve I (6) is arranged on the upper portion of the double-wall main valve body (1), and a double-wall ball valve II (7) is arranged on the lower portion of the double-wall main valve body (1). The double-wall ball valve I (6) comprises a ball valve I inner pipe channel (7), a ball valve I outer pipe channel (8) and a ball valve switch I (9); a double-wall ball valve II (10) is arranged on the lower portion of the double-wall main valve body (1) and comprises a double-wall ball valve II outer pipe channel (11), a double-wall ball valve II inner pipe channel (12), a left valve body (13), a right valve body (14) and a ball valve switch II (15). According to the utility model, the continuous circulation of the shaft in the single connecting process can be kept uninterrupted, and the pressure of the shaft is kept stable.

The invention provides an integrated device and method for adjusting the air flow and heat of an aero-engine, and relates to the field of aero-engines. In the device, an air path shell is connected with an oil path shell, the first connecting end of a piston rod is connected with a main valve element through a connecting base, and the second connecting end of the piston rod is connected with the first connecting end of a piston; a third connecting end of the piston rod is connected with the linear displacement sensor; a second connecting end of the piston is in contact with the interior of the left valve sleeve; an oil inlet of the oil way shell is connected with an input oil port of the electro-hydraulic servo valve, an oil return port of the oil way shell is connected with an oil return port of the electro-hydraulic servo valve, the first working oil port is connected with the left valve sleeve, and the second working oil port is connected with the right valve sleeve. The adjusting method comprises the steps of air heat adjusting and air heat flow simultaneous adjusting. The flow and heat of air entering the air compressor can be distributed to prevent an aero-engine from freezing and surging, meanwhile, high-temperature gas is prevented from directly heating an oil way, and the requirements for light weight and integration of the aero-engine are met.

The utility model relates to a construction waste dedusting pipeline light substance filter valve, which comprises a support valve body and a glasses valve core, the support valve body comprises a left valve body and a right valve body which are arranged at an interval left and right, the glasses valve core is embedded between the left valve body and the right valve body, and the left end and the right end of the glasses valve core are respectively connected with the left valve body and the right valve body in a sealing way; the glasses valve element comprises a cage grate driving device and at least two filtering cage grates. The cage grate driving device is used for driving the filtering cage grates to be alternately connected with the supporting valve body. The left valve body and the right valve body are fixedly connected through a supporting rod, the axis of the supporting rod is parallel to the axis of the supporting valve body, and the distance between the axis of the supporting rod and the axis of the supporting valve body meets the requirement that the filter cage grate and the supporting valve body are allowed to be in butt joint and disengaged. According to the utility model, the automatic separation of light substances in the construction waste dust removal pipeline and the automatic replacement of the filtering device are realized, the workload of fault cleaning and maintenance is reduced, the normal operation of a production line is ensured, and the production efficiency is improved.

The utility model belongs to the field of ball valves, and particularly relates to a symmetrical ball valve which comprises a left valve body and a right valve body, the right valve body is fixedly installed on one side of the left valve body, connecting flanges are fixedly installed on the outer side of the left valve body and the outer side of the right valve body respectively, a disassembling and assembling mechanism is arranged between the two connecting flanges, a left sealing shell is installed on the top of the left valve body, and a right sealing shell is installed on the top of the right valve body. A left sealing shell is fixedly installed at the top of the left valve body, a right sealing shell is fixedly installed at the top of the right valve body, a valve element is arranged between the left valve body and the right valve body, a valve rod is fixedly installed at the top of the valve element, the valve rod penetrates through the left sealing shell and the right sealing shell and is provided with a handle, and a locking mechanism is arranged between the handle and the left sealing shell and between the handle and the right sealing shell. And a communicating hole is formed in the connecting flange. The ball valve is reasonable in design, the valve element is convenient to disassemble, assemble and maintain, meanwhile, by fixing the handle, the purpose that the handle does not move can be achieved, and the situation that the ball valve is opened and closed by mistake is avoided.

The utility model provides a cylinder valve with a low-pressure alarm function, which comprises a valve body, an air inlet channel and an air outlet channel are longitudinally arranged in the valve body, a right valve cavity, a left valve cavity and a ventilation flow channel are transversely arranged in the valve body, the ventilation flow channel is used for communicating the right valve cavity with the left valve cavity, one end of the air inlet channel is communicated with the right valve cavity, and one end of the air outlet channel is communicated with the left valve cavity. The air inlet control component comprises a first valve head and a first valve head control assembly, the first valve head is arranged in the right valve cavity, the first valve head control assembly is used for driving the first valve head to move left and right in the right valve cavity, the air outlet control component comprises a second valve head and a second valve head control assembly, and the second valve head is arranged in the left valve cavity. The second valve head control assembly is used for controlling the second valve head to move left and right in the left valve cavity. The diver does not need to pay attention to the residual gas pressure all the time and does not need to check the handheld pressure gauge all the time, and therefore convenience and safety are guaranteed when the diver dives.

The present invention provides a dual-redundant servo valve and its application, belonging to the field of electro-hydraulic servo control; comprising a housing, two sets of electro-hydraulic servo valves and a hydraulic pressure sensor; the two sets of electro-hydraulic servo valves are connected in parallel and arranged in the housing, respectively defined as a left valve and a right valve; the hydraulic pressure of the left valve is monitored by the hydraulic pressure sensor; the left valve is set as the main valve, and the right valve is set as the backup valve; when the right valve is a hot backup, the two sets of electro-hydraulic servo valves are started at the same time to control the supply pressure, and if one of them fails, the other can independently complete the control target; when the right valve is a cold backup, the backup valve is started only when the main valve fails to complete the control target. The dual-redundant servo valve proposed in the present invention is composed of a pair of twin electro-hydraulic servo valves on a common housing. The reliability model of the left valve and the right valve of the valve system is a parallel relationship. As long as one of the electro-hydraulic servo valves is normal, the dual-redundant servo valve can complete the regulation and control of the output pressure.

According to the special low-temperature ball valve for liquefied natural gas, the lower end of a ball body is radially positioned in an installation cavity of a left valve body, a left valve seat which is located on the left side of the ball body and is attached and matched with the outer spherical surface of the left side of the ball body is installed in the installation cavity of the left valve body in a sealed mode, and a right valve body and the left valve body are detachably connected into a whole in a sealed mode. The lower end of a valve rod arranged in a center hole of the lengthening rod in a penetrating mode penetrates out of a through hole in the upper end face of the left valve body and is connected with the upper end of the ball in a matched mode, and the valve rod is rotated through a handle arranged above the lengthening rod and connected with the valve rod in a matched mode. On-off control of a ball center channel and channels in the left valve body and the right valve body is achieved. The ball valve structure is optimized, the problem of leakage caused by uneven stress distribution is solved, under the action of the right valve seat elastically installed in the right valve body, sealing under reliable contact with the ball body is achieved, the leakage risk is eliminated, the ball body is accurately positioned, and the installation efficiency is improved.

The axial-flow type diaphragm hydraulic control valve comprises a left valve body, a valve seat, a valve element assembly, a spring, a right valve body and a piping assembly, the valve seat is installed at the inlet end of the left valve body, a hollow boss and a half of a control cavity are arranged in the left valve body, a through hole is formed in the control cavity in the left valve body, and the valve element assembly is installed in the through hole. The other half of the control cavity is arranged in the right valve body, and the left valve body is connected with the right valve body. The valve element assembly comprises a valve disc, a valve shaft, a forming diaphragm and a diaphragm pressing plate. The piping assembly comprises a pipe fitting, a first valve and a second valve. Compared with the prior art, the valve has the advantages of being simple in structure, flexible to open and close, stable in flow state, resistant to cavitation, small in vibration, capable of preventing incrustation, capable of eliminating the turbulence phenomenon and the like.

The high-speed three-way two-position hydraulic reversing valve comprises a valve body and a valve cavity, valve elements connected through a connecting rod are slidably connected to the two sides of an inner cavity of the valve cavity, the valve element on the left side is driven by an external hydraulic mechanism, and the valve element on the right side is connected with the inner cavity of the valve cavity through a reset spring; an oil port O, an oil port A and an oil port B which are sequentially formed between the two valve elements from left to right are formed in inner cavities of the valve cavities, and inner grooves are formed in the two sides of each valve cavity. When the high-speed three-way two-position hydraulic reversing valve normally moves, friction between a hollow elastic sealing ring and a valve cavity is reduced, the situation that the service life is shortened due to severe abrasion generated when the high-speed three-way two-position hydraulic reversing valve repeatedly moves left and right is prevented, and through arrangement of a push plate and a top plate on the two sides, automatic extrusion is achieved after the high-speed three-way two-position hydraulic reversing valve moves in place; the hollow elastic sealing ring expands for sealing again, friction loss can be effectively reduced while the sealing effect is guaranteed, and the service life of the reversing valve is effectively prolonged.

The present invention relates to an electric temperature control valve. It comprises a central valve body, a left valve body and a right valve body. A water inlet main interface is provided at the bottom front of the left valve body, an internal flow channel is provided inside the central valve body and the water inlet main interface and the internal flow channel are connected, a plurality of groups of upper interfaces and lower interfaces are provided at the front of the central valve body, and a plurality of water outlet interfaces are provided at the rear of the central valve body; a front flow valve core is provided inside the water inlet main interface and a front drive motor is installed on the left valve body, a rear flow valve core is installed inside each water outlet interface and a plurality of flow drive motors are installed on the top of the central valve body, a rear stop valve core is installed inside each lower interface and a plurality of stop drive motors are installed on the bottom of the central valve body. In addition to having the function of household temperature control flow regulation, the present invention also has the function of user multi-zone temperature control flow regulation, achieving the dual technical effects of household heat balance and user internal zone heat balance.

The utility model relates to a valve field technical field, a split type lock residue valve, including left valve body and right valve body, left valve body is connected through bolt and right valve body screw thread, left valve body upper end is fixedly connected with valve seat, the inner wall of valve seat is fixedly connected with sealing washer, the inner wall of sealing washer is fixedly connected with valve rod, the upper end of left valve body is connected with protection mechanism and is opened through the control aluminum alloy material's protection strip outside left valve body and right valve body, make the recess of protection strip inside will be caught on the bolt of left valve body and right valve body both ends, play the effect that protection strip protects outside, and protection cover will cover the lower end of arc -shaped seat again and protect, improve the corrosion intensity of installation position, make the stability and service life of whole valve.

The utility model discloses a mining automatic reversing valve for different media, different flows and different pressures, which comprises a valve block, a left side O-shaped ring, a left side liquid inlet K-shaped joint, a left side valve seat, a liquid outlet K-shaped joint, an upper side O-shaped ring, a right side valve seat, a right side O-shaped ring, a right side liquid inlet K-shaped joint, a right side fastening O-shaped ring, a right side valve seat fastening screw, a reversing steel ball and a left side fastening O-shaped ring, the components form the mining automatic reversing valve with different media, different flows and different pressures.

The utility model discloses a ball valve convenient to disassemble and maintain, which belongs to the technical field of valves and comprises a left valve body and a right valve body, a valve core is connected to the center of the left valve body and the center of the right valve body, a hard clamping sleeve is integrally formed on one side, close to the right valve body, of the left valve body, and the hard clamping sleeve is connected with the valve core. An inner-layer inserting-connecting groove is integrally formed in the side, close to the left valve body, of the right valve body, the valve element is located in the center of the hard clamping-connecting sleeve and the inner-layer inserting-connecting groove, the left valve body and the right valve body are connected in an inserted mode through the hard clamping-connecting sleeve and the inner-layer inserting-connecting groove, and under the condition that the inserted-connecting is formed, the valve element is inserted into the inner-layer inserting-connecting groove. The high-temperature-resistant paraffin, the hot melt adhesive and other components are utilized to form a softener dynamic rigid component, so that a certain rigid connection effect can be provided during connection, a sufficient sealing effect can be promoted under the condition of connection, and certain sealing performance can still be ensured under the condition that disassembly and assembly are convenient.

This invention discloses a high-temperature resistant, zero-friction, soft-seal ball valve. The ball valve includes a valve body, a ball, a valve stem, a valve cover, and an actuator. The left valve stem has an inlet channel A, and the right valve stem has an outlet channel A, forming a first cooling circuit flowing through the ball. The valve cover has an inlet channel B and an outlet channel B, forming a second cooling circuit flowing through the valve cover. The valve body has an inlet channel C and an outlet channel C, forming a third cooling circuit flowing through the valve body. An inflatable and deflated sealing ring is provided between the valve cover, valve seat, and the ball's sealing surface. The valve cover has a vent channel connected to the sealing ring's inflation port and a pneumatic control system. The pneumatic control system includes a filter pressure reducing valve, a solenoid valve, a pneumatic control valve, a quick-release valve, and a pressure transmitter, and controls the inflation and deflation of the sealing ring through a control center. This invention cools the sealing ring through a dual cooling circuit, successfully applying soft sealing to high-temperature conditions.

The ultra-large flow reversing valve for the coal mine comprises a left valve sleeve, a piston, a valve element, a valve seat, a clamp, a compression spring and a right valve sleeve, and the left valve sleeve, the piston, the valve element, the valve seat, the clamp and the right valve sleeve are all of a rotary body structure. The left valve sleeve and the right valve sleeve are connected through a hoop, the end of the left valve sleeve is concaved inwards to form a left valve sleeve cavity, the piston is located in the left valve sleeve cavity, one end of the valve element is located in the piston, the other end of the valve element is located in the right valve sleeve, and the valve seat is located at the end of the left valve sleeve and abuts against the inner surface of the left valve sleeve. And the compression spring is sleeved on the valve core and is positioned in the right valve sleeve. A control port and a liquid return port are formed in the left valve sleeve, the axis of the control port is perpendicular to the axis of the left valve sleeve, the control port and the liquid return port are both communicated with a cavity of the left valve sleeve, a liquid inlet is formed in the right valve sleeve, and the liquid inlet is communicated with a gap between the valve element and the right valve sleeve. The valve element is provided with a valve element through hole and a working opening, and the axis of the working opening is parallel to the axis of the right valve sleeve.

The utility model discloses a bidirectional hard sealing floating titanium alloy ball valve, which belongs to the technical field of titanium alloy ball valves, and comprises a valve body, a left valve body, a valve seat, a ball valve and a right valve body, the valve seat and the ball valve are arranged in a valve cavity defined by the left valve body and the right valve body in a combined mode, and bidirectional hard sealing floating assemblies are arranged in the valve seat, the left valve body and the right valve body. Through mutual cooperation of the groove, the spring, the sealing gasket, the graphite sealing ring and the pressing seat, the valve can keep good sealing performance during bidirectional flowing, and the problem that the elasticity of a traditional titanium alloy ball valve is attenuated due to the fact that the graphite sealing ring is directly pressed through the spring for a long time is solved; and the ball body is pushed to be in close contact with the valve seat through the pressure of a medium, so that the graphite sealing ring is pressed, the pressure load of the spring is effectively dispersed, and the sealing failure risk caused by spring elasticity attenuation is reduced.

The utility model relates to an axial flow type diaphragm hydraulic control valve, which comprises a left valve body, a valve seat, a valve core component, a spring, a right valve body and a piping component, the valve seat is arranged at the inlet end of the left valve body, a hollow boss and a half of a control cavity are arranged in the left valve body, the control cavity in the left valve body is provided with a through hole, and the valve core component is arranged in the through hole. The other half of the control cavity is arranged in the right valve body, and the left valve body is connected with the right valve body. The valve element assembly comprises a valve disc, a valve shaft, a forming diaphragm and a diaphragm pressing plate. The piping assembly comprises a pipe fitting, a first valve and a second valve. Compared with the prior art, the utility model has the advantages of simple structure, flexible switch, stable flow state, cavitation resistance, small vibration, scale prevention, turbulent flow elimination and the like.

The invention relates to a pneumatic ball valve, in particular to a long-service-life pneumatic ball valve and a using method thereof, and solves the technical problems that an existing pneumatic ball valve adopts a bypass pipeline to balance pressure and the design of a passive floating valve seat is limited in anti-attrition effect. A first electromagnetic valve of the pneumatic control unit injects gas into a first driving cavity and a second driving cavity through a first gas path and a second gas path respectively, a right valve seat slides through pressure change, gas is injected into the first driving cavity before a ball rotates, so that the right valve seat and a second sealing assembly are separated from the ball, and after rotation is completed, the right valve seat and the second sealing assembly are separated from the ball. Air is injected into the second driving cavity, so that the right valve seat is reset, sealing of the ball body is guaranteed, complex linkage parts or telescopic ball body design is not needed, the machining and assembling difficulty is low, upgrading and reconstruction of an existing pneumatic ball valve are facilitated, and the service life of the pneumatic ball valve is prolonged.

The utility model discloses a ball valve body convenient to connect with a valve cover, and relates to the technical field of ball valves. The ball valve comprises a ball valve body, and the ball valve body comprises a right valve body, a left valve body arranged on one side of the right valve body, a valve seat located on the inner wall of the right valve body and the inner wall of the left valve body, a rotating sleeve located in the valve seat and a ball valve element installed in the rotating sleeve and the right valve body. A valve cover body structure, comprising a mounting groove formed in the upper end of a right valve body, a sealing ring and filler located on the inner wall of a mounting sleeve, a valve rod rotationally inserted into the sealing ring and the filler, a lantern ring located at the upper end of the right valve body, a valve cover body connected to the outer side of the lantern ring and the outer side of the valve rod in a sleeving mode, positioning holes formed in the valve cover body and the lantern ring, and a positioning rod inserted into the positioning holes. And the spring sleeves the outer side of the positioning rod. Through the arrangement of the valve cover body structure, the problems that the valve cover body and the ball valve body are fixed through welding, the welding process is increased, the assembling process is time-consuming, and assembling is inconvenient are solved.

The utility model relates to the technical field of cut-off valves, in particular to a dual-drive chain wheel type gas cut-off valve which comprises a bottom frame, a left valve body, a right valve body, a valve plate, a plate turning device and a clamping device, and the valve plate is arranged between the left valve body and the right valve body in a rotating mode. The right valve body comprises a fixed valve body and a floating valve body, the fixed valve body is connected with the left valve body through a pull rod, the floating valve body is connected with the left valve body through a clamping device, the lower end of the floating valve body is provided with a roller and is in rolling fit with the underframe through the roller, and a corrugated pipe for length compensation is arranged between the floating valve body and the fixed valve body; the clamping device comprises a turning plate chain wheel, a left transmission chain wheel, a right transmission chain wheel, a lead screw and a chain, guide wheels are rotationally arranged on the left side and the right side of the lower end of the left valve body, and a guide plate is arranged at the lower end of the valve plate and inserted into wheel grooves of the guide wheels. By arranging the guide wheel, when the valve plate is overturned, the guide plate at the lower part of the valve plate is inserted into the guide wheel, so that the valve plate is ensured to be overturned stably and a sealing ring is prevented from being scratched.