31results about How to "Same sealing effect" patented technology

The invention discloses a waterproof and dustproof sealing structure for an illuminating lamp. The waterproof and dustproof sealing structure comprises a lamp tube (1), wherein end covers (2) are mounted at two ends of the lamp tube (1); seal rings (3) are arranged between the end covers (2) and the lamp tube (1); U-shaped grooves are formed on the seal rings (3) and sleeved at the end parts of the lamp tube (1) and wrap the inner wall and the outer wall of the lamp tube (1); anti-slip and sealing ring-shaped bulges (31) are formed on the inner surface and the outer surface of the sides of the seal rings (3) positioned on the outer wall of the lamp tube (1); grooves are formed in the end covers (2); the grooves on the end covers (2) wrap the seal rings (3); the ring-shaped bulges (31) on the seal rings (3) are clung to the inner wall of the end covers (2); and the seal rings (3) are made of silica gel.

Electric power transport system having a cold dielectric superconducting cable, a cryostat and a cryogenic fluid. The cryostat has modules including an inner tube, an outer tube, a couple of gaskets, and a duct connected to the coupling surface between the gaskets of at least one flange with the environment external to the cryostat.

The invention provides a method for producing a fiber reinforced plastic pressure container, which comprises the following steps that: S1, a blowing needle is divided into a plurality of segments, and source nipples are respectively fixed on the uppermost blowing needle and the lowermost blowing needle; S2, the segmented blowing needles are connected into a whole and fixed under a liner molding material extruding outlet, and a blow molding machine extrudes a liner material to a position where the liner material completely covers the blowing needle; S3, a mold is matched, high-pressure air is input from the lower part of the blowing needle for pressure maintaining after the mold is matched so as to make a liner completed formed; and S4, the mold is opened and the blowing needle is screwed out. The pressure container produced by the method has the integral liner, has the same pressure-bearing and sealing properties as a pressure container with a single-head source nipple, and high process productivity and product percent of pass, needs no subsequent processing, and can meet the requirement of mass production.

The invention relates to a double-plate double-valve-seat bi-directional metal-sealed butterfly valve, which comprises a drive device, a support, a filler, a filler gland, a bottom cover, a valve body, a butterfly plate, an upper valve shaft, a lower valve shaft, a valve shaft pin, valve seats, a butterfly plate metal seal ring, a pressing plate, a valve seat pressing plate, a check ring and an adjustable valve seat seal ring. The valve seats are oppositely arranged between a disk and the valve body at two sides of the upper valve shaft; the valve seats are oppositely arranged between the disk and the valve body at two sides of the lower valve shaft; and the valve seats are fixed valve seat and/or adjustable valve seats. The butterfly valve has a scientific and reasonable structure design, a simple structure, easiness in processing and manufacturing, large caliber, high flow capacity, high pressure resistance, high temperature resistance, corrosion resistance, diversion stability, small vibration, low noise, long service life, and capability of on-line overhauling and replacing a sealing element, and a double-sealed pair works cooperatively or independently when at a two-way alternative pressure-bearing state so as to further realize two-way sealing.

The invention provides an active labyrinth seal structure. The active labyrinth seal structure comprises a rotor, blade seal rings, seal jackets and a locking nut, wherein the blade seal rings are fastened with the rotor through spline joints; the number of blade seal rings can be increased as needed; a shaft end of the rotor is fastened by using the locking nut; the two semi-round seal jackets are fastened on the blade seal rings; rectangular teeth on the seal jackets are crossed with blades; and when rotating, the rotor drives the blade seal rings to rotate, and the blades on the seal rings can form active reverse air flow in a seal channel, so that the air leakage can be effectively inhibited. The active labyrinth seal structure is simple in structure and better in seal effect.

An insert adapted for use in a plug valve includes a single-piece body having an inner sidewall adapted to interface with a sidewall of a valve plug. First and second opposing apertures are each defined through the single-piece body for selective alignment with a flow bore of the valve plug. First and second opposing slots are each defined through the single-piece body at an angle to the first and second opposing apertures for allowing the body to flex in the direction of the first and second opposing apertures.

The invention discloses a cast-in-place drainage channel structure of a free-form construction top plate. The cast-in-place drainage channel structure comprises a cushion layer, wherein a bottom plate is poured on the cushion layer; a left side wall and a right side wall are poured on the left side and the right side of the bottom plate separately; a left connecting rebar and a right connecting rebar are buried into the tops of the left side wall and the right side wall; a top plate member is arranged between the tops of the left side wall and the right side wall; and a top plate wrapping body is poured on the tops of the left side wall and the right side wall and on the top plate member. The invention further discloses a construction method of the cast-in-place drainage channel structure of the free-form construction top plate. The method comprises the steps of prefabricating the top plate member in batches; casting the cushion layer, the bottom plate, the left side wall and the right side wall on site; installing the top plate member; and casting the top plate wrapping body. The sealing property of a drainage channel can be ensured, the problem that a bottom form and a support used for casting the top plate in a traditional construction method are difficult to remove is solved, the construction efficiency is relatively high, and the proficiency requirement on filling operation of a worker is lower than that in a traditional ''cover plate method prefabricating method''.

A sealing device (1) for a wheel-hub unit (1) provided with a rolling bearing (3) and having a central axis (A) is provided with a shielding member (6) joined together with an outer ring (4) of the bearing so as to sealingly isolate the bearing, and then is equipped with a cylindrical mounting wall (61) coaxial with the central axis and engaged with a collar (41) of an outer ring of the bearing, and an annular reading wall (63), arranged transversely with respect to the axis (A), connected to the cylindrical wall (61) and facing a phonic wheel (51) mounted inside the bearing. The thickness (S)of the annular reading wall (63) can be variable radially depending on an angle (alpha) of oscillation of the phonic wheel between an undeformed position of the annular front surface (53a) of the phonic wheel equidistant from the plane P perpendicular to the axis (A) and a possible deflection position of the annular front surface (53a), which may be arranged to be equidistant from the annular reading wall but not in contact with the annular reading wall, of the phonic wheel.

The invention discloses a rotary sealing device which comprises a base. A rotating body is arranged at one end of the inner side of the base, a rotating piece and a fixing piece are arranged at the inner side of the rotating body, the rotating piece and the fixing piece are connected in a rotating manner, elastic rubber is arranged at one side of the rotating piece and one side of the fixing piece, and the elastic rubber is of an annular structure; and the elastic rubber is arranged in the inner side of the rotating body. According to the rotary sealing device, sealing is carried out in a screwing and extruding manner, sealing can be carried out within the deformation range of the elastic rubber and within the range that the internal diameter reaches zero, the sealing range is ultra-wide, and the sealing practicability is improved; when the device is used, the sealing structure can be pre-installed in advance, sealing can be carried out by screwing the rotating piece after a cable penetrates through the sealing structure, the installation time is saved, and the installing efficiency is improved; and meanwhile, the sealing structure is simple and convenient to install, later part replacement is facilitated, secondary construction is not needed, and the practicability of the device is improved.

The invention discloses a tool assembly for assembly of a manual-selected valve. The tool assembly comprises a positioning tool, an end cover mounting device and a constant-load pressurizing sealing device, the positioning tool fixes and positions the manual-selected valve by arranging a base, a bracket connecting sleeve, a pressing sleeve and the like; and the end cover mounting device is provided with a bearing plate, an end cover hanging frame, a long pressing bolt and the like to assist in mounting and fixing of a center shaft and an end cover, and the constant-load pressurizing sealing device is provided with a connecting plate, a base frame, a loading bolt and the like to achieve pressurization between a valve body and a sealing steel ball so as to improve the sealing performance. Compared with the prior art, the tool assembly has the beneficial effects that the valve is conveniently assembled through the arrangement of the positioning tool, the end cover and the center shaft are rapidly installed through the end cover mounting device, parts are protected in place in the mounting process, damage to the parts is avoided, pressurization sealing between the sealing steel ball and the valve body is conveniently and rapidly completed through the constant-load pressurizing sealing device, the sealing effect is improved, and the use stability of the parts is improved.

The invention discloses an automobile rotation shaft movable sealing device. The automobile rotation shaft movable sealing device comprises a rotation shaft, a left sealing barrel, a right sealing barrel, a middle sealing barrel, sealing filler, a first spring, a second spring, a first fixing bolt, a second fixing bolt and nuts. When the rotation shaft jumps, the rotation shaft exerts larger forceto the sealing filler on one side of the rotation shaft, the sealing filler conducts force to the middle sealing barrel at the time, and the middle sealing barrel overcomes the elastic force of the first spring and the second spring to slightly slide in the radial direction of the rotation shaft. Accordingly, it is guaranteed that the same sealing force is formed between the sealing filler on thetwo sides of the rotation shaft and the rotation shaft, and abrasion of the sealing filler due to jumping of the rotation shaft is avoided. In the normal state, the first fixing bolt and the second fixing bolt do not make contact with the middle sealing barrel. The nuts are used for avoiding large-range sliding of the middle sealing barrel. The first spring and the second spring are used for absorbing part of radial force generated during rotation shaft jumping, and the service life of the sealing filler is further improved.