268results about How to "To achieve the purpose of sealing" patented technology

The invention relates to a method for sealing holes of micro arc oxidation film at room temperature. Solution prepared with sodium silicate, nickel salt, solvent and accelerant is adopted as a sealant, after stewing for at least 2 hours, the sealant is adopted to seal the holes of micro arc oxidation film by soaking at room temperature, after sealing holes, the sealant forms an adsorption crystal packing in micro holes on the surface of the micro arc oxidation film so as to achieve hole sealing. The solvent is deionized water, and the ratio of sodium silicate, nickel salt and accelerant is as follows: 5-15 g/L of sodium silicate, 2-8 g/L of nickel salt and 0.1-2 g/L of accelerant. The sodium silicate is sodium metasilicate pentahydrate or sodium metasilicate. The nickel salt is nickel fluoride, nickel acetate or the mixture of the two. The accelerant is boric acid, thiourea, zirconium potassium fluoride or the mixture thereof. The solution of sealant provided by the invention can be used without heating, and the hole sealing can be performed at room temperature, which is easy and simple and has good hole sealing effect without any effect to the hardness of ceramic membrane. Meanwhile, the corrosion resistance of ceramic membrane can be improved.

The invention discloses a movable sealing connection device of a rotary furnace. A copper sleeve is sleeved on a rotary barrel body and fixedly connected with a water cooling bearing seat through a perforation bolt, a press cover is fixed on the water cooling bearing seat through a bolt, an inner labyrinth ring inner hole is connected with the rotary barrel body in a clearance fit mode, oil immersed asbestos filler is filled between the inner side of the labyrinth cover inner ring and the outer side of the inner labyrinth ring inner ring, and the sealing press cover covers the filler tightly. High temperature resistant grease is injected in a gap between the water cooling bearing seat and the inner labyrinth ring and the labyrinth cover through an oil cup. A sealing cover is fixedly connected with the labyrinth cover through a bolt, and the sealing cover is arranged on a frame. The connection device adopts the modes of labyrinth sealing and grease filling to conduct sealing conveniently, is simple in structure, cannot abrade parts and ensures a lubricating effect due to the fact that the grease sealing can be conducted by simply filling the grease continuously and a sealing effect cannot become poor in the use process.

The invention relates to a dynamic seal device, which is installed between a rotating shaft and a box body, and is sleeved on the rotating shaft. The dynamic seal device comprises a ring-shaped base body, and a seal ring group which is located in the base body, wherein the seal ring group comprises an inner seal ring and an outer ring which are radially arranged along the rotating shaft. At least one slit is respectively opened on the inner seal ring and the outer seal ring, and the positions of the slits on the inner seal ring and the outer seal ring are mutually staggered. When the dynamic seal device with the structure is in working state, the axial motion and the radial motion can be kept, and the invention can freely float together with the rotating shaft. Therefore, the dynamic seal device of the invention has higher service life, and excellent seal property, which can meet the sealing needs of high temperature and high pressure.

The invention relates to the field of dimming films, and particularly discloses self-compacting concrete prepared from recycled aggregate, and the self-compacting concrete prepared from the recycled aggregate comprises 40-50 parts of heat-resistant coarse aggregate, 10-15 parts of modified recycled aggregate, 30-40 parts of fine aggregate, 8-10 parts of cement, 6-10 parts of water, 4-8 parts of mineral powder and 2-5 parts of fly ash. According to the invention, the structure of the recycled aggregate in the self-compacting concrete prepared from the recycled aggregate is optimized, the compactness of the material is improved and capillary pores and microscopic cracks in the recycled aggregate are filled by coating the recycled aggregate with slurry, meanwhile, the structure of the slurry-coated recycled aggregate is round and smooth, pores formed between actually filled materials are small, and thus the compact structure of the self-compacting concrete is further improved, and the mechanical strength of the self-compacting concrete prepared from the recycled aggregate is effectively improved.

The invention discloses a piston structure for closed type compressor, wherein the compressor comprises a shell which consists of a cylindrical body, an upper cover and a lower cover, a motor and a compressor assembly are installed in the shell, the motor consists of a stator, a rotor and a crankshaft, the compressor assembly consists of a cylinder, an upper bearing and a lower bearing, and a plurality of evenly distributed spiral grooves are arranged along an inner cylindrical face on the upper end face of a piston and are used for storing a part of lubricating oil so as to form an oil film with a certain thickness and enough strength on the end face of the piston, therefore the leakage of refrigerant gas from the end face of the piston can be reduced, the purpose for sealing the end face is achieved, friction is lowered, and the efficiency and the service life of the compressor can be improved.

The invention relates to a three-eccentric valve with a symmetric leakage stop ring. The three-eccentric valve comprises a valve body, a valve piece and the leakage stop ring, wherein opening and closing of the valve piece can control the flow of a passing fluid; the valve piece forms an asymmetric cone shape, in which two extension lines formed at the upper and lower lateral margins are asymmetric, the slope factor (absolute value), relative to the center line of the valve piece, of the extension line at the upper lateral margin is greater than that (absolute value), relative to the center line of the valve piece, of the extension line at the lower lateral margin; the two inclined lines extend towards the left side to form a crossing point, and the distance between the crossing point and the center line of the valve body is not larger than the semidiameter of the valve piece; the leakage stop ring is an O-shaped ring and is accommodated on the outer side of the valve piece to prop against a valve seat; the leakage stop ring is radially symmetric about the axis passing through the center of the leakage stop ring.

The present invention relates to a seal oil bottom case oil passage jam, wherein the jam is a self-plugging rivet composed by clinch bolt core and hat. A through hole is provided on the central position of the hat for rod of the clinch bolt core passes through and the trend of the through hole consistent with rod body direction. A fracture part is set along circumferential direction on the rod inside the through hole; radial dimension of the head of the clinch bolt core bigger than diameter of aperture of the through hole and smaller than radial dimension of the hat. The present invention also discloses a bottom case oil passage jam method. A clinch bolt is stricken into the oil passage hole and then outer pulled to make interference fit between the transformed clinch bolt and the oil passage hole thereby be sealed.

The invention discloses a mechanical seal device of a plant water pump for a nuclear power plant. The mechanical seal device comprises a mechanical seal shaft sleeve, a mechanical seal cavity, a mechanical seal gland, an assembling plate, a transmission seat, a rotating ring, a static ring and a plurality of springs. An outer flange ring is arranged at the lower part of the mechanical seal shaft sleeve; a plurality of spring holes are evenly distributed at the upper end face of the outer flange ring; an inner flange ring is arranged at the upper part of an inner cavity surface of the mechanical seal cavity; an inner circle surface of the inner flange ring is a one-step-ladder-shaped surface with a large upper part and a small lower part; the lower part of the inner circle surface of the mechanical seal gland is configured into a ladder-shaped surface; the ladder-shaped surface forms a ring installing slot together with the ladder-shaped surface on the mechanical seal cavity; the mechanical seal gland and the mechanical seal cavity are axially fixed on the pump body by the assembling plate; the static ring is embedded in the ring installing slot; a raised plate is arranged in the middle of the transmission seat; the transmission seat capable of axially moving is installed on the mechanical seal shaft sleeve; the rotating ring is fixed in an inner cavity at the upper part of the raise plate of the transmission seat; and the plurality of springs are arranged in the spring holes of the mechanical seal shaft sleeve, so that the upper end face of the rotating ring can be slidably jointed with the lower end face of the static ring.

The invention discloses a gas expansion device and a necking processing method and application of an expansion tube. The expansion device includes an expansion tube and an inflatable ignition head. The method is to fix the expansion tube through the clamp first, then rotate the expansion tube and heat the end of the expansion tube through the clamp, heat the end of the expansion tube until it is close to or reach plastic deformation, and after the front part of the shrinking mold touches the end of the expansion tube, The end of the expansion pipe moves from the front to the rear of the shrinking die, and the shrinking die extrudes and thickens the end of the expansion pipe, and the end of the shrinking end is thickened axially outward, and then the end of the expansion pipe is processed with a through-hole knife. Through-hole fixed aperture. The expansion tube is made into a pressure vessel by shrinking. The utility model has the advantages of simple structure, easy processing of structural components, low manufacturing cost, no flying head, no air leakage, safe transportation, no hidden danger of squib, and large expansion force.

The invention relates to a sealing device, in particular to a sealing device for processing a bottle opening. The sealing device comprises a base bracket, a support frames, a driving motor, a capping frame, a feeding mechanism and the like. The bottom of one side of the base bracket is fixedly connected with a pair of supporting frames, the driving motor is installed on the top of the base bracket, the capping frame is fixedly connected to the upper portion of the base bracket, and the feeding mechanism is arranged on the base bracket. Through mutual cooperation of the feeding mechanism and a sealing mechanism, bottle caps can be continuously and automatically screwed to bottles to be sealed to seal the bottles, the speed of sealing the bottles is higher compared with the speed of manually screwing the bottle caps to seal the bottles, and the purpose of sealing the bottles can be achieved.

The invention provides a constant pressure regulating valve. The constant pressure regulating valve comprises a valve body, wherein a water inlet and a water outlet valve body which are communicated through a water hole are formed in the two ends of the valve body; a screw rod coaxial with the water hole is arranged on the valve body in sealed fit; the head part of the screw rod extends into the valve body; a spring sleeve is fixed on the part of the screw rod; a guide post is arranged on the end surface of the head part of the screw rod in sliding fit; a water baffling plate capable of covering the water hole and cutting off the water inlet and the water outlet is fixed on the end part of the guide post; a spring is arranged between the water baffling plate and the spring sleeve; the tail part of the screw rod extends out of the valve body; a hand wheel is fixed on the end part of the screw rod. The constant pressure regulating valve lifts the screw rod through clockwise rotation of the hand wheel, the spring fixing sleeve of the screw rod positions the pressure regulating spring so as to enable the water baffling plate to be in contact with the water hole of the valve body, and the rotation of the hand wheel stops when the pressure meets a requirement; the constant pressure regulating valve can also play a sealing role, and when the pressure of the pressure regulating spring is close to the maximum pressure, the bottom of the screw rod is in contact with the guide post and the water baffling plate completely seals the water hole so as to achieve a sealing aim.

The invention provides a self-tightening seal ball valve which comprises a valve body, a sphere, a valve seat and a valve rod, wherein the valve body comprises an upper valve part, a lower valve part, and a cavity in which the sphere is arranged, and the valve rod connected with the sphere in the cavity extends out of the valve body through a central through hole at the upper valve body; the ball valve also comprises floating bodies and compression rings; the numbers of the floating bodies and the compression rings are respectively two, and the floating bodies and the compression rings are respectively arranged on the left and right sides of the valve body; the compression rings are sleeved on the floating bodies and fixedly arranged on the valve body through nuts and studs, and the floating bodies are fixed connected to the valve body through the compression rings; and a middle-path seal ring is arranged in a groove between each floating body and the valve body, each compression ring is provided with a draw bolt, and the draw bolt passes through each compression ring from the outside of each compression ring and then is inserted into each floating body so as to tightly draw each floating body, thereby pre-tightening the middle-path seal ring between each floating body and the valve body. According to the self-tightening seal ball valve, the larger the outward traction forces exerted on the left and right floating bodies are, the more reliable the sealing is.

The invention relates to a capping head assembly with a constant torsion. The capping head assembly comprises a close cover, a buffer mechanism, a magnetic sleeve, a rotating assembly and a cap grasping assembly, wherein the magnetic sleeve is connected with the close cover through the buffer mechanism and can rotate synchronously with the close cover, the rotating assembly comprises a magnetic rotating sleeve, an inner magnetic ring is nested inside the magnetic sleeve, the magnetic rotating sleeve is provided with an outer magnetic ring, both the inner and outer magnetic rings are provided with a plurality of magnets, these magnets are uniformly arranged into a circle, magnetic poles of two adjacent magnets at the same side are opposite, and the number of magnets in the outer and inner magnetic rings is the same. The close cover and the magnetic sleeve rotate along with a motor, thus to drive the rotating assembly and the cap grasping assembly to rotate synchronously, achieving a sealing effect. When the close cover gets to position or receives a set torque, the close cover and the magnetic sleeve continue rotating whereas the rotating assembly stops rotating with the magnetic sleeve, thereby avoiding over-twisting. When magnetic poles are switched, pulses can be removed to the largest extent, a constant torsion is guaranteed, the cap is protected from over-twisting when being closed.

The invention discloses the sealing device for the tube expansion machine use. Because the outside diameter of the seal loop is smaller than the inside diameter of the tube waiting for expansion, so the seal loop cannot be easily cut by the ends of the tubes when the seal head is inserted into the tubes; when the seal head is inserted, pull the squeezing part of the head, and the surrounding slot formed by the seal head base and the extruding part becomes narrow to extrud the seal loop and to enlarge the outside diameter of the seal loop.

The invention relates to a flexible freeze-thaw resistance treatment method for highway bridge expansion joints in a seasonal frozen soil region and belongs to a maintenance and treatment method for the traffic road bridge broken maurer joints. The method includes: chiseling off the broken concrete of the original anchorage zone, clearing the original concrete materials, pouring the high-performance wear-corrosion resistance concrete, filling the flexible filling materials in the boundary beam maurer expansion joints, wherein the initial setting time of the filleting materials is 3-5 hours, and the consolidation time is 25-30 days, and ending the treatment. The flexible freeze-thaw resistance treatment method for the highway bridge expansion joints in the seasonal frozen soil region can improve the anchorage performance of the maurer joints, resists the freeze and thaw, prevents the water seepage and earth leakage, solves the problem that the expansion joints of the road bridge often occur, achieves the joint sealing purpose by direct embedding of the flexible wear-corrosion resistance filler in the joints, is simple in treatment method, and not only can prevent the water seepage and earth leakage of the expansion joint, but also is free of freeze and thaw in winter.

A sealing ring for a rotating shaft comprises a sealing lip (1), an outer diameter sealing body (2) and sealing ribs (3) at the sealing lip (1), wherein the sealing lip (1) is connected with the outer diameter sealing body (2); the sealing ribs (3) comprise a first spiral sealing rib (3.1), an annular sealing rib (3.2) and a second spiral sealing rib (3.3), and the annular sealing rib (3.2) is located between the first spiral sealing rib (3.1) and the second spiral sealing rib (3.3); the sealing lip (1) is in interference fit with the rotating shaft. Compared with the prior art, the sealing ring has the characteristics that the sealing ring is not abraded easily, the usage cost is low and leakage does not occur easily.