10results about How to "Solve seal failure" patented technology

The utility model discloses a novel small-caliber fixed ball valve seat, relates to the technical field of ball valve seats, and aims to solve the problems that in order to achieve a good sealing effect of a small-caliber ball valve at present, the number of springs needs to be increased, thrust needs to be increased by enlarging the pressure difference area of the valve seat, sealing is formed, the valve torque is increased, and the service life is prolonged. The problems that in the valve opening and closing process, the specific pressure of a sealing ring is directly increased due to the fact that thrust of a spring and a medium on a valve seat is increased, the friction loss of the sealing ring is increased, the sealing performance of the sealing ring is affected, and finally sealing fails are solved. Valve seats are symmetrically arranged on the two sides of the ball body, triangular ring lock covers are arranged below the ends, close to the ball body, of the valve seats, elastic triangular rings are arranged between the valve seats and the sides, close to the ball body, of the triangular ring lock covers, compression spring grooves are formed in the four corners of the inner side of the valve body, and compression springs are arranged in the compression spring grooves.

The utility model discloses a kind of sealing structure and the 90 degree junction box of double cable of base assembly, comprising: base assembly, upper cover assembly and second screw, the second plane is formed on base assembly upper end face, and threaded hole is formed on it symmetrically;The utility model is matched with the T type limiting boss of sealing ring by the gap of outer circumferential surface lower part, and the limitation of sealing ring circumferential rotation and axial displacement is cleverly realized.Specially, limiting boss is designed as six and is reasonably distributed along square sealing ring, ensure that sealing ring is evenly stressed, will not be loose in any direction, to solve the problem that sealing ring is offset and leads to sealing failure due to vibration or assembly error, realize accurate, stable multistage limiting of sealing ring, effectively prevent offset and twist, ensure sealing reliability.

The utility model relates to waterproof box technical field, concretely is a waterproof box, including the box, its top is provided with the box cover, and the locking mechanism is provided between the box cover and the box, the sealing frame strip is set in the top of the inner wall of the box, and the magnetic attraction mechanism is provided between the box cover and the sealing frame strip. The utility model discloses through the cooperation of magnetic attraction mechanism and limiting rod and waist -shaped hole, can automatically adsorb and promote the sealing frame strip when the box cover closes, makes it and the top of the inner wall of the box tightly and closely form initial seal, solved the problem of initial seal not strict of traditional structure because of lacking effective pre -tightening force.

The invention relates to the technical field of fluororubber processing, in particular to a fluororubber sealing element resistant to electrolyte corrosion and a preparation method of the fluororubber sealing element. The fluororubber is prepared from the following raw materials in parts by weight: 100 parts of fluororubber, 10-15 parts of polytetrafluoroethylene micro powder, 4-8 parts of an acid acceptor, 5-7 parts of magnesium-aluminum hydrotalcite, 3-5 parts of polyhedral oligomeric silsesquioxane, 35-40 parts of inorganic filler, 30-35 parts of carbon black, 8-10 parts of an active agent, 2-5 parts of a peroxide vulcanizing agent and 2-5 parts of a cross-linking agent. The fluororubber is composed of low-fluorine-content binary fluororubber and a polyvinylidene fluoride-hexafluoropropylene copolymer, through the synergistic effect of all the components, the volume swelling rate of the sealing element is controlled to be 8% or below under the condition that the sealing element is soaked in an electrolyte at the temperature of 85 DEG C, and the compression set is reduced to be within 15%; and after accelerated aging for 1000 hours, excellent elastic recovery capability and interface sealing pressure are still maintained. The sealing element has the wide temperature range adaptability of-20 DEG C to 200 DEG C and good mechanical strength, and the problem of size instability caused by swelling and softening of traditional fluororubber is effectively solved.

This application relates to an oil collecting plate for a high-pressure fuel pump. The oil collecting plate has a protrusion extending from both sides, located on the side edges. This protrusion increases the thread depth of the high-pressure fuel outlet connector, thereby increasing the effective number of thread turns and also increasing the thickness of the high-pressure sealing area, effectively blocking the impact of high-pressure fuel. To avoid stress concentration at the contact point between the high-pressure fuel outlet connector and the oil collecting plate, the original planar seal is replaced with a conical seal, improving the sealing performance of the oil collecting plate and reducing stress concentration within it. This application is applicable to the high-pressure sealing of diesel engine oil collecting plates.

The utility model discloses a high-temperature pre-tightening anti-jamming metal hard sealing V-shaped ball valve, which relates to the technical field of valves, and comprises a valve body, a valve core, a valve seat, an upper valve rod and a lower valve rod, the valve core is a ball body and is provided with a V-shaped notch, one side of the valve seat back to the valve core is provided with a pressing ring, and the outer side of the pressing ring is fixedly provided with a sealing seat cover. The sealing seat cover comprises a mounting part, a first sealing part and a second sealing part which are connected; a spring cavity is formed between the mounting part and the pressing ring, and a spring is arranged in the spring cavity; the first sealing part is located at the end, close to the flow channel, of the spring cavity and seals the end, and a first sealing ring is arranged between the first sealing part and the pressing ring. The second sealing part is located at the end, close to the valve body, of the spring cavity and seals the end, the second sealing part extends into the pressing ring, and a second sealing ring is arranged between the second sealing part and the pressing ring. According to the utility model, a medium can be completely prevented from entering the spring cavity, and the effect of preventing the medium entering the spring cavity from causing spring jamming and valve failure caused by pre-tightening failure is achieved.

This utility model relates to a water-sealing device with floats. The device includes a liquid-sealed water tank and a secondary water tank, which are connected by a connecting pipe. A valve is installed on the connecting pipe. The water-sealing device includes two sets of floats connected by connecting rods, respectively disposed in the liquid-sealed water tank and the secondary water tank. The middle part of the connecting rod is connected to a sliding mechanism in a sliding pipe, and the sliding mechanism is connected to the valve on the connecting pipe. The liquid level change of the floats drives the sliding mechanism to control the opening and closing of the valve, realizing automatic water replenishment from the secondary water tank to the liquid-sealed water tank. The water-sealing device also includes a pressure roller assembly for squeezing out liquid from the fabric. The water-sealing device provided by this utility model, through the automatic control of the float assembly, solves the problem of liquid level drop in the liquid-sealed water tank during continuous operation due to moisture loss from the fabric, ensuring stable and reliable sealing performance of the water-sealing device.

The invention relates to the technical field of oil and gas well drilling and completion, in particular to a method and system for prolonging the service cycle of a gas drilling rubber core, and the method comprises the steps that after the rubber core of a rotary blowout preventer is installed, a drilling tool continues to be put into a well mouth to the well bottom; gas is injected into a hexagonal drill rod of the drilling tool, and the gas returns out of a drill bit of the drilling tool along the drilling tool, enters an annular space between the drilling tool and a borehole and moves upwards; detecting whether sealing of the rubber core fails, and if not, discharging gas along an overflow pipeline on one side of the rotary blowout preventer; if yes, the gas is not exhausted any more, colloidal liquid is injected from the four-way position of the wellhead and enters the annulus, the gap between the hexagonal drill rod of the wellhead and the rubber core of the rotary blowout preventer is filled with liquid flow in the circumferential direction under washing of the gas in the lower annulus till sealing is completed, and then the gas continues to be exhausted. Through the method and the system, the possibility of sealing failure of the shale oil horizontal wellhead rubber core is reduced; and the overall drilling speed is relatively high.

The utility model discloses a dustproof sealing structure of automobile ball pin belongs to automobile parts technical field, including ball head seat, connecting rod and dust cover still includes the locating assembly of fixed in the lower end of dust cover and the sealing assembly of upper end, and locating assembly realizes the positioning through the locating ring of inserting in ball head seat locating groove, and realizes the locking through the resistance rod of accommodating in ball head seat sliding slot and the friction fit of it, and sealing assembly drives side board through tightening spare, and side board pushes the clamping plate of rotation connection to seal by the rubber body of setting up in on connecting rod being pressed tightly to the utility model discloses the structure, has solved the problem of the existing dust cover because of vibration easy to unthread, and the low problem of sealing reliability, and its positioning locking is stable, and the sealing clamping force is strong, can effectively prolong the service life of ball pin.

The invention discloses a manufacturing method of a stainless steel integral inner liquid inlet piston rod of a hydraulic support oil cylinder. The process of sizing, induction heating, local upsetting, thermal refining, rough turning, finish turning, surface quenching, deep hole drilling, liquid through hole drilling, joint hole milling and drilling, sealing and hole blocking, grinding and polishing is adopted, and the problem that a liquid inlet piston rod in a whole of a traditional hydraulic support is poor in corrosion resistance is solved. On the premise that the mechanical property and the corrosion resistance of the piston rod are guaranteed, the machining process is shortened, the machining process is simplified, welding is avoided, and the production efficiency and the corrosion resistance of the hydraulic oil cylinder piston rod are improved, so that the service life of a hydraulic support is prolonged. And the method has very important significance in realizing efficient operation of the fully-mechanized coal mining equipment under the mine.