37 results about "Valve float" patented technology

An overhead rotary valve fitted into a cylinder head with diametrical polygonal openings formed therein for use in combination with an internal combustion engine, driven to bring intake and exhaust ports into and out of alignment with passages leading to and from the combustion chamber. Sleeve bearings are fitted in the cylinder head that provide surface sealing, and annular sealing members prevent the air/fuel mixture or exhaust gases from flowing into regions intermediate ports and individual cylinders. Utilizing this overhead rotary valve and associated seals and bearings increases the efficiency and performance of an internal combustion engine. The overhead rotary valve rotating, at one quarter the speed of the crankshaft, minimizes wear and noise levels, self cleans the ports, allows the engine to operate at higher rpm and imparts proper opening and closing of passages at the proper sequence of valve timing without concern of valve float. The instant invention removes the need for reciprocating intake and exhaust valves, camshafts, rocker arms, lifters, push rods, valve guides and retainers, and other related hardware for actuation, significantly increasing the reliability and effectiveness of the internal combustion engine, while reducing overall manufacturing costs.

In prior art engine breather systems, shut off valves that prevent oil from entering the engine induction system have been mounted externally on the engine and require associated external pipework. Both the shut off valve and pipework are prone to damage and leaking. The closed circuit breather apparatus of the present invention includes a cylinder head cover and a shut off valve provided beneath the cylinder head cover. The shut off valve includes an aperture in communication with a blow-by gas inlet passage and a valve float restrained to move between a first position in which the aperture is open and a second position in which the aperture is closed. Preferably the shut off valve is integral with the cylinder head cover. The shut off valve is thus packaged inside the engine valve chamber, making it easy to fit and eliminating leak paths.

The invention discloses an oil spillage cutoff valve, which comprises a valve body and a total valve cover, wherein the valve body comprises an upper end cover and a valve bottom cover; a sealing element with a first vent is arranged in the middle of the upper end cover; a pressure holding valve is arranged in the total valve cover above the upper end cover; a valve floating core capable of floating up and down is arranged in the valve body; a first spring is arranged between the valve bottom cover and the valve floating core; the middle of the valve floating core is provided with a second vent; a pressure relief valve core is arranged below the second vent, and the pressure relief valve core is arranged in the valve floating core; a second spring is arranged between the pressure relief valve core and the valve floating core; in a stretching state of the second spring, the pressure relief valve core closes the second vent; and when the second spring is compressed, the second vent is conducted through the pressure relief valve core. The oil spillage cutoff valve has the advantages that: when an oil tank is inclined or full of oil, if the pressure in the oil tank exceeds a certain value, the high air pressure bursts through the pressure relief valve core, the second spring is compressed, the second vent in the middle of the valve floating core is conducted, and the gas in the oil tank is exhausted from the second vent, so that normal air pressure in the oil tank is ensured.

The invention relates to a full-automatic small-scale sewage cleaning vehicle, which generally includes three parts: a sewage collection system, a transmission system and a vehicle body. Among them, the car body includes the chassis and electrical bracket; the sewage collection system and electrical system are assembled on the car body chassis to support the whole vehicle to complete various operations. The sewage collection system mainly includes a vacuum pump, a vacuum tank, a pressure gauge, a vacuum tube, an electronically controlled vacuum tube switch, a float type automatic shut-off valve, and a sewage collection bucket. The transmission system includes drive wheels, universal wheels, circuit systems, controllers, control handles, and batteries. The float type automatic shut-off valve is composed of the first interface of the float type automatic shut-off valve, the second interface of the float type automatic shut-off valve, the body of the float type automatic shut-off valve, the float type automatic shut-off valve core, the float ball connecting rod, Float. The invention has a high degree of automation, can realize automatic operation, and saves time and effort.

The invention discloses an overflow cut-off valve. When a fuel tank is toppled, a valve floating core is in an inclined state; the weight of the lower part of the valve floating core is greater than that of the upper part of the valve floating core; the valve floating core is slightly staggered relative to an inner cavity of a valve casing; the valve floating core is not fixedly connected with a sealing element but a supporting pillar on the valve floating core provides a pivot for the sealing element and the sealing element can swing along the pivot; when the fuel tank is toppled, a return spring overcomes a resolution force of the gravity of the valve floating core to eject the valve floating core forwards and a sealing assembly leans against the lower end face of a ventilation hole; greater air pressure in the fuel tank acts on the inner side of the sealing assembly, so that the sealing assembly swings and a sealing surface on the sealing element is tightly attached to the ventilation hole. Compared with the traditional rubber valve with the fixed valve floating core, the overflow cut-off valve disclosed by the invention has the characteristics that the sealing element of the valve floating core can adjust the angle and seal the ventilation hole under the action of internal air pressure, and thus the fuel leakage of the fuel tank in a toppling state is further reduced.

The invention discloses a pressure-transmitting pin snapping and fracturing automatic grouting valve float valve. The automatic grouting valve float valve is characterized in that a float valve and a valve support mechanism are mounted in a float valve joint, a valve body seat of the float valve is hinged to a valve, the elasticity of a torsion spring on both the valve and the valve body seat enables the valve to close the valve body seat when the valve is in the free state; a support bar in a valve support mechanism, through which a valve hinge mount and a valve body hinge mount, supports the elasticity of the torsion spring to enable that the valve and the valve body seat can not be closed; the valve of the float valve is in the semi-opened state to form a fluid flow passage, so that the purpose of automatic grouting can be achieved. When the pump is started after tripping, or well kick occurs in a pipe, and the force acted on the valve by fluid once the blowout slurry is reversely sprayed is larger than the tensile strength of the support bar, the support bar is snapped and fractured, and the valve, which loses the supporting force after pump stop or during well kick and blowout to be in the free state, is promptly closed under the action of the resultant force of the spring force and the like. As pressure transmitting small holes are obliquely formed in the valve, pressure of fluid inside and outside the valve after the valve is closed is transmitted.

A method for modification and improvement in internal combustion engine systems utilizing six strokes (1. an intake stroke, 2. a compression stroke, 3. a power stroke, 4. an exhaust stroke, 5. an intake-cooling stroke and 6. an exhaust-cooling stroke) and incorporating changes to the camshaft lobes and valve train timing providing for a 3:1 camshaft to crankshaft ratio allowing for higher revolutions per minute, lower idling speeds, reduced valve float and smoother operation. The system provides for more efficient fuel combustion during the power stroke, which extends past bottom dead center thus increasing power, fuel efficiency, and greatly reduces harmful emissions. The additional fifth and sixth strokes provide for intake and exhaust cooling. The system demonstrates increased reliability, efficiency, and a cooler operating environment while operating with various fuels.

The invention provides a steam valve assembly which can be applied in a pot cover of a cooking apparatus. The steam valve assembly comprises a valve body provided with an air outlet, and a driving assembly; the valve body is movably installed on the pot cover and can move about between a first position and a second position under the driving of the driving assembly for closing or opening the air outlet. According to the invention, through the movable arrangement of the valve body, on one hand, the ability of conducting vapor outward can be changed according to the temperature inside the pot; one the other, the whole steam valve floats upwards during exhausting which prompts users to be careful of being burnt. The invention also provides a cooking apparatus comprising the steam valve.

The invention discloses a pin-pulled broken-type automatic grouting valve floating valve. The automatic grouting valve floating valve is characterized in that one end of a supporting rod is connected with a valve cover pin hinge seat through a pin, and the other end is connected with a valve body pin hinge seat through another pin. The automatic grouting valve floating valve is simple in structure, and is easy to process, assemble and replace parts. As one end of the supporting rod is connected with the valve cover pin hinge seat through the pin, and the other end is connected with the valve body pin hinge seat through another pin, when a valve of the floating valve is in a half-open state, a fluid channel can be formed to realize the purpose of automatic grouting; and when the supporting rod is pulled and broken in a pumping circulation process, the valve can be automatically closed under the action of a spring to realize a function of a check valve.

The invention provides a pressure limiting valve and a cooking utensil. The pressure-limiting valve comprises a valve seat provided with an air inlet hole; a valve cover which covers the valve seat, wherein a cavity is defined by the valve cover and the valve seat, at least two mounting holes are formed in the top end of the valve cover, and the mounting holes are communicated with the cavity; andfloat valves, wherein at least two float valves are mounted in the at least two mounting holes in a one-to-one correspondence manner, exhaust channels are formed in the float valves, the float valvesare provided with sealing positions for blocking the mounting holes and exhaust positions for communicating the exhaust channels with the cavities, and the float valves float up and down in the axialdirection of the mounting holes so as to be switched between the sealing positions and the exhaust positions. Due to the fact that the number of the float valves is two or more, each float valve is provided with the corresponding exhaust channel, exhaust is conducted on the cooking utensil through the multiple exhaust channels at the same time, cold air in the cooking utensil can be rapidly exhausted out, cold air residues in the cooking utensil can be effectively reduced, and the cooking efficiency of the cooking utensil is conveniently improved.

An internal combustion engine cylinder valve actuation system permitting elimination of valve springs. Valve opening and closing is actuated by a valve actuation means such as pressurized liquid or gas, or else mechanical wires or linkage means. The energy created by combustion causes liquid or gas valve actuation means to oscillate or else circulate between corresponding cylinder valves causing synchronized valve opening and closing between those cylinders. Mechanical linkages similarly comprise physical connections between corresponding cylinder valves and effect synchronized valve opening and closing between those cylinders. The above system thereby eliminates valve float and valve spring failure where valve springs are not required and a typical internal combustion engine is easily retrofitted to accommodate this system.

The invention belongs to an innovative design for balancing an automatic water distribution system. The system structure comprises a floating plate, a fixed pulley, a rope, a plumb bob, an airbag and a siphon; the sewage flows into the system from a water inlet, and then flows out the system from a water outlet after passing through the siphon; an automatic closing valve is arranged at the water inlet; when the water volume in a water inlet pool is evacuated, the closing valve is automatically closed since the suffered floating force is declined, thereby controlling the liquid in the siphon to flow out; when a water level in the pool is risen, the valve floats upward and is automatically opened to form the siphonage, thereby enabling the water flow to flow out in balance. The automatic water distribution system is an environment-friendly equipment system without energy consumption, and can be extensively applied to constructed wetlands, oxidation ponds, land sheetflood and other sewage ecological purification engineering.

The invention provides a dynamic precision adjusting device for an electric spindle of a high-speed machine tool. The dynamic precision adjusting device comprises a system sealing device, a hydraulic pre-tightening device, a bearing outer ring rotating device and a shaft system rotation error reducing device. The system sealing device is composed of a plurality of O-shaped sealing rings and lip-shaped sealing rings and used for hydraulic sealing among all components. The hydraulic pre-tightening device is used for bearing pre-tightening and mainly comprises wedge-shaped sealing cavities formed among all components, and a second movable valve floats on the surface of hydraulic oil through the pressure of the hydraulic oil. In addition, according to the hydraulic pre-tightening device, hydraulic oil is introduced into the wedge-shaped sealing cavities opposite in position, the second movable valve is subjected to counter-acting force, so that oil pressure fluctuation is eliminated, and meanwhile a filtering device also reduces the oil pressure fluctuation to a certain degree. The bearing outer ring rotating device is used for adjusting the relative positions of bearing outer rings to prevent the wave crests or wave troughs of the raceway harmonic waves of the bearing outer rings from being in the same axis direction, so that the overall runout of bearing set inner rings is reduced. The shaft system rotation error reducing device is used for reducing the run-out error when the shaft end is stressed.

A pressure cooker comprises a surface cover and an upper cover which are assembled into a cooker cover, an assembly gap between the surface cover and the upper cover forms an installation space, the upper cover is provided with an exhaust port, a float valve matched with the pressure cooker is arranged in the exhaust port, a float valve pressure limiting rod and a guide check block triggering thefloat valve pressure limiting rod to move are arranged in the installation space, the guide check block and the float valve pressure limiting rod are movably arranged in the installation space, one end of the float valve pressure limiting rod is located on one side of the exhaust port, the surface cover or the upper cover is provided with a key, and the key is connected with the guide check blockin a matched mode. The key is pressed to drive the guide stop block to move upwards, the guide stop block drives the float valve pressure limiting rod to move towards the exhaust port, and the float valve pressure limiting rod partially shields the exhaust port so as to limit the float valve from floating towards the exhaust port; the pressure in the pressure cooker is large, the float valve floats upwards towards the exhaust port, the float valve pressure limiting rod is prevented from moving towards the exhaust port, the key cannot be pressed, the problem that the cover cannot be opened at will when air pressure exists in the cooker is solved, and the pressure cooker has the advantages of being safe and reliable.

The invention relates to an automobile fuel tank valve body arrangement method and structure. The valve body arrangement structure comprises a fuel tank upper shell, a safety valve, an evaporation pipe, an oil discharge valve and an oil discharge pipe. The oil tank upper shell is provided with an air vent, the safety valve is installed on the inner wall of the oil tank upper shell, and the evaporation pipe is communicated with the air vent and the safety valve. A sinking groove is further formed in the oil tank upper shell, and the evaporation pipe passes through the sinking groove to form a sinking section; the oil discharge valve is mounted on the inner wall of the oil tank upper shell; the oil discharge pipe is communicated with the oil discharge valve and the sinking section; the oil drain valve is arranged to communicate with the sinking section of the evaporation pipe, when the liquid level in the fuel tank descends to a certain height, fuel accumulated in the sinking section flows back into the fuel tank through the oil drain valve, and the situation that the pressure inside and outside the right half part of the fuel tank is unbalanced due to pipeline blockage of the sinking section is avoided; 2, the oil discharge valve is preferably a GVV valve, and when the oil tank is full of the oil level, an inner valve body of the GVV valve floats upwards under buoyancy and is automatically closed; and when the fuel level drops to a certain height, the floater in the GVV valve sinks and is automatically opened.

The invention discloses a suction and exhaust valve floating ball capable of being adjusted according to system pressure and a suction and exhaust valve composed of the floating ball. The suction andexhaust valve floating ball comprises a floating ball shell (4), an adjusting mechanism used for adapting to the outside pressure is arranged in the floating ball shell (4), and the adjusting mechanism is a piston-shaped mechanism or a balloon-shaped mechanism in an inner cavity of the floating ball shell (4). Compared with the prior art, the suction and exhaust valve floating ball can be adjustedaccording to the system pressure, adapts to change of the pressure in a conveying pipeline to a certain extent, and it is ensured that the conveying pipeline is safe and smooth.

The invention discloses a double spring support pull type automatic filling valve float valve. The automatic filling valve float valve is characterized in that a float valve is arranged in a float valve joint, a valve is hinged to a valve seat of the float valve, the elastic force of a torsion spring which is supported on the valve and the valve seat can enable the valve to be closed up with the valve seat when the valve is in a free state, the principle that the holding force and pulling force of a tension spring are used for balancing the elastic force of the torsion spring when an automatic closing valve type float valve is closed, and the force which flows into a pipe and is caused by liquid column pressure difference inside and outside the pipe can make the valve be always in an ajar state, a fluid flow passage is formed, and the purpose of automatic filling is achieved. When kick or blowout happens in the pipe, the tension spring of the valve is lengthened under the action of flowing liquid in the pipe. The valve is closed, and plays the action of a single flow valve. The problem of being unable to automatically fill of the existing valve type float valve is solved. The tension spring and the torsion spring are replaced and the force and the length of the springs are adjusted before the drilling tool is run into a well every time; the double actions of the double springs avoid the abuse of losing effectiveness of the float valve after the torsion spring is easily broken.

The invention relates to a hydraulic control valve. A new means of achieving a valve float position in a closed centered hydraulic control valve. The valve has a main spool position whereby pressure compensator load sense control pressure is drained to tank through the main spool. Secondly, a pin acts on the pressure compensator to prevent the main pump flow from reaching the main section spool. Finally, the new spool position adds a connection from the consumer to tank, enabling a float position.