201 results about "Left valve" patented technology

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 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.

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 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 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 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.

The application belongs to the technical field of check valves, and particularly relates to a low-temperature double-valve-piston check valve, which comprises a valve body, a positioning rod rotatably connected in the valve body, and a ring-shaped valve seat fixedly connected with the positioning rod. The positioning rod is fixedly connected with a left valve piston through an upper rotating cylinder and rotatably connected with a right valve piston through a lower rotating cylinder. A spring one is arranged between the positioning rod and the upper rotating cylinder, and a spring two is arranged between the positioning rod and the lower rotating cylinder. A steering assembly is arranged at the upper end of the positioning rod. Through the steering assembly, the positioning rod is driven to rotate by 180 degrees, and the ring-shaped valve seat, the left valve piston and the right valve piston in the valve body are all driven to rotate by 180 degrees, so as to change the check direction of the valve body and adapt to the pipeline temporarily changing the fluid guiding direction. The whole check valve does not need to be removed, and only needs to be driven to rotate by 180 degrees through the steering assembly, so that the operation is convenient and fast.

The invention provides a manual flow regulating valve which comprises a right valve body, a throttling sleeve, a ball, a rod sleeve, a valve rod, an upper cover, a hand wheel, a driving nut, a left valve body and a lower cover, flow channels are formed in the left valve body and the right valve body and comprise a first flow channel and a second flow channel, the throttling sleeve and the ball are located at the communicating position of the first flow channel and the second flow channel, and the throttling sleeve is located on the outlet side; a throttling hole is formed in the middle of the throttling sleeve; a step-shaped mounting cavity is formed in the upper cover, a mounting through hole is formed in the top of the left valve body, the rod sleeve is rotationally connected with the step of the mounting cavity and the mounting through hole, and the bottom of the rod sleeve is fixed to the ball; the valve rod is inserted into the rod sleeve and is in threaded connection with the driving nut; the driving nut moves up and down, the driving rod sleeve drives the ball to rotate, the channel communicates with the throttling hole, and the valve opening degree is adjusted through gradual rotation of the ball. And when the opening degree is adjusted to the set opening degree, self-locking is carried out. The low-torque self-locking valve can achieve low-torque sealing and self-locking, is high in structural strength and good in corrosion resistance and has the linear flow characteristic.

The utility model discloses an anti-coking, impact-resistant and vibration-resistant adjusting ball valve for coal chemical industry black water, and relates to the field of adjusting ball valves. In coal chemical industry black water treatment, a black water medium has the characteristics of high suspended matter content, high temperature, high alkali content, high corrosion content and high-hardness solid particle content, and abrasion, corrosion, coking jamming and driving failure of traditional valve internals are easily caused. Comprising a fixing shaft, a left valve body, a right valve body, a left valve seat, a right valve seat, a ball body, a valve rod and an executing mechanism, the ball body, the valve seats and valve body flow channels are spray-welded with tungsten carbide layers with the hardness larger than or equal to HRC65, the left valve seat and the right valve seat achieve two-way pre-tightening sealing through spiral springs and the ball body, and scraper type cutting edges are arranged on the sealing faces of the valve seats. The valve rod adopts a large-diameter high-strength design and is in anti-rotation connection with the ball body, and the stuffing box adopts a disc spring load limiting and pressurizing structure. The wear resistance, impact resistance and coking resistance are remarkably improved, bidirectional reliable sealing is achieved, stable driving under the high-torque working condition is guaranteed, the service life of the valve is prolonged, and the valve is suitable for the coal chemical industry black water extreme working condition.

This quick-acting check valve has two ends of its body for connecting to the feed pipe. One end of the valve body contains a guide rod, on which a left and right valve disc are fitted. The back of each valve disc has a connecting part. A screw is located inside the valve body, with one end extending out of the valve body. The screw inside the valve body is divided into upper and lower sections. The upper section has clockwise threads, and the lower section has counterclockwise threads. A sleeve is fitted on the upper section, and another sleeve is fitted on the lower section. One sleeve is movably connected to one end of a connecting rod, and the other end of this connecting rod is movably connected to the connecting part on the back of the right valve disc, driving the right valve disc to open and close. The other sleeve is movably connected to one end of another connecting rod, and the other end of this connecting rod is movably connected to the connecting part on the back of the left valve disc, driving the left valve disc to open and close. The left and right valve discs are used to open and close one end of the valve body. Advantages include: good sealing due to the connecting rod, rapid response, and improved sealing due to the beveled design.

An emergency breakaway valve belongs to the technical field of breakaway valves and comprises a left valve body assembly, a reset spring, a left valve clack, a sealing gasket, an energy storage sealing ring, a sealing valve seat assembly, a right valve clack, a right valve body assembly and a safety assembly. A plurality of fixing seats, reset springs, left valve clacks, sealing gaskets and energy storage sealing rings are fixedly installed at the outer ends of the inner sides of the left valve body assembly and the right valve body assembly respectively, the sealing valve seat assembly and the right valve clacks are installed in the left valve body assembly and the right valve body assembly respectively, and the left valve body assembly and the right valve body assembly are installed together through the safety assembly. The safety valve has a double-safety function, in practical application, when overload is caused by various external acting forces, and a snap bolt is not broken and bent, the safety pin can be effectively broken, then the two valve bodies are separated, the valve clacks on the inner sides of the two valve bodies move in place under the acting force of the spring, the combination portions of the valve clacks and the valve bodies are sealed, media are effectively blocked, and the safety valve is safe and reliable. And serious accidents caused by medium leakage are prevented.

This invention discloses a power-off compensation mechanism for a two-dimensional electro-hydraulic servo valve directly driven by an ultrasonic motor. The mechanism includes a 2D valve assembly, an ultrasonic motor, an electromagnetic transmission assembly connecting the 2D valve assembly and the ultrasonic motor, and a motor cover. The 2D valve assembly includes an LVDT body, an LVDT sensing core, a left valve end cover, a left plug, a valve body, a valve sleeve, a valve core, a concentric ring, and a right plug. The electromagnetic transmission assembly includes a braking assembly and a motion transmission assembly. The braking assembly includes a right valve end cover, a coil, a retaining ring, and a return spring assembly. The motion transmission assembly includes a first coupling, an armature, and a second coupling. This invention uses a direct-drive ultrasonic motor to move the valve core via the motion transmission assembly. Energizing the braking assembly disconnects the valve core shaft from the motor shaft, solving the problem of the ultrasonic motor jamming due to power failure. This allows for independent and effective control of the valve core even during abnormal braking and when the motor stops rotating.

The invention discloses an auxiliary steering brake valve, belongs to the field of brake-steering systems, and solves the problems that an existing auxiliary brake valve is large in occupied space and insufficient in brake oil supply amount of a high-power machine type. The valve comprises a main valve body, a left push rod assembly, a right push rod assembly, the main valve body, a left reversing valve set, a right reversing valve set and a brake valve set are arranged on the main valve body, a left valve cavity, a middle valve cavity and a right valve cavity which are mutually independent and isolated from the outside are formed in the main valve body, and the left valve cavity is provided with the left reversing valve set capable of sliding in the axial direction. The middle valve cavity is provided with a brake valve set capable of sliding in the axial direction, the right valve cavity is provided with a right reversing valve set capable of sliding in the axial direction, and the left reversing valve set and the brake valve set are jointly connected with a left push rod assembly used for driving the left reversing valve set and the brake valve set to move. The auxiliary steering brake valve is small in occupied space, high in brake output pressure, large in generated brake torque, capable of guaranteeing the brake effect and capable of being used on large-tonnage hydraulic brake vehicle models.

The utility model provides a diaphragm type oxygen generation valve which comprises a valve body, a left valve rod assembly and a right valve rod assembly, the left valve rod assembly and the right valve rod assembly are installed in the valve body in a sliding mode, the upper end of the left valve rod assembly is sleeved with a left diaphragm, a left gland is installed on the portion, located on the upper side of the left diaphragm, of the valve body, and the left gland presses and fixes the outer edge of the left diaphragm; a left control cavity is formed between the left gland and the left diaphragm, and a left miniature electromagnetic valve communicated with the left control cavity is mounted on the valve body; the upper end of the right valve rod assembly is sleeved with a right diaphragm, a right gland is fixed to the valve body, and the outer edge of the right diaphragm is fixed through the right gland. A right control cavity is formed between the right gland and the right diaphragm, and a right miniature electromagnetic valve communicated with the right control cavity is installed on the valve body. The diaphragm type oxygen generation valve overcomes the defects that an existing oxygen generation valve is driven by a piston, so that the anti-pollution capacity is poor, and the service life is short.