37results about How to "No loss of tightness" patented technology

The invention discloses a low-temperature storage transfer device and an operation method thereof. The low-temperature storage transfer device is used for conveying a transfer pot from the external environment to a refrigeration house and comprises a sealing component and a transmission component, wherein the sealing component comprises an inner door and an outer door; the inner door is provided with an inner lifting mechanism, the outer door is provided with an outer lifting mechanism, and a sealable buffer area is formed between the inner door and the outer door; the inner door is communicated with the refrigeration house, and the outer door is communicated with the external environment; the transmission component comprises an outer transmission mechanism and an inner transmission mechanism; the outer transmission mechanism is used for conveying the transfer pot from the external environment to the buffer area, and the inner transmission mechanism is used for conveying the transfer pot from buffer area to the refrigeration house. The low-temperature storage transfer device can ensure that a biological sample cannot be exposed in the normal-temperature environment after the transfer pot is uncapped, thereby reducing sample damage. The buffer area can prevent the inner part of the transfer pot from frosting, and the success rate of automatically storing and taking pipes is increased.

The invention provides a lithium-ion secondary battery which comprises a shell, a cap component used for sealing the shell in an insulating way, and a battery cell and electrolyte that are arranged in a cavity defined by the shell and the cap component, wherein a first pole ear and a second pole ear are led out from the battery cell; the first pole ear is electrically connected with the shell, and the second pole ear is electrically connected with the cap component; the cap component comprises an electric connection component and a sealing ring arranged at the outer side of the electric connection component; the electric connection component comprises a positive temperature coefficient (PTC) thermistor protector, an anti-explosion piece and an upper cap which are sequentially and electrically connected; the PTC thermistor protector is positioned between the second pole ear and the anti-explosion piece; the lower surface of the PTC thermistor protector is electrically connected with the second pole ear, the central part of the upper surface of the PTC thermistor protector is electrically connected with the lower concave part in the centre of the anti-explosion piece, and the edge around the upper surface of the PTC thermistor protector is provided with an insulating washer so as to be insulated with the edge around the anti-explosion piece; and PTC thermistor protector is provided with a vent hole. The lithium-ion secondary battery has higher safety performance and sealing performance, the internal structure of the battery is simplified, and the internal space of the battery is effectively utilized.

In a rotating compressor, an outer peripheral surface (40) of a partition member (23) which is secured firmly to a casing (10) so as to divide the inside of the casing (10) into a high-level pressure space and a low-level pressure space, is provided with a peripheral groove (42) for allowing for shrinkage of the casing (10) at a weld area where a trunk part (11) and end plate (12) of the casing (10) are welded together. As a result of such arrangement, the partition member (23) is strongly tightened by making utilization of such shrinkage, thereby not only enhancing sealability between the high-level pressure space and the low-level pressure space in the inside of the casing (10) but also preventing a drop in workability during assembling and an increase in cost.

The invention provides an indoor-temperature curing flame-retardant silicone sealant which comprises, by weight, 65-85 parts of hydroxyl-terminated polydimethylsiloxane, 15-25 parts of plasticizers, 30-50 parts of fillers, 2-8 parts of organic silicon cross-linking agents, 1-10 parts of coupling agents, 4-8 parts of flame retardants and 2-8 parts of catalysts. The flame retardants are mainly prepared from nano-scale magnesia-aluminum hydrotalcite and polyaspartic acid in a modified manner. The indoor-temperature curing flame-retardant silicone sealant has good flame resistance and excellent adhesive properties.

According to the present invention, a square can capable of securing high sealing performance even if the radius of curvature of the seamed part at its seamed corner part is reduced, enabling a reduction in the depth of its counter sink, reduced in size, and having excellent sealability and storage efficiency and a method and a device for double-seaming the square can. A secondary seaming roll (55) is guided by a model cam for secondary seaming having a model cam surface for secondary seaming formed in such a shape that it is swelled from a model cam surface for primary seaming outwards at the corner seamed part (5). Accordingly, the seamed part of the corner caulking part (5) is formed in such a shape that the seamed width thereof at the center of the corner seamed part is larger than the seamed width of the linear sealed part (4) of the can and is swelled outwards to absorb an increase in plate thickness at the corner seamed part. Also, a seaming wall part (6) is formed in a tilted seamed shape so that the overlap of a cover hook (8) with a body hook (10) of a prescribed amount can be secured without allowing the cover hook (8) to fall from the body hook (10) so as to maintain excellent sealability.

The invention discloses an fabricated wallboard with gap sealing and water leakage preventing functions, and belongs to the technical field of fabricated wallboards. The wallboard comprises a first fabricated wallboard, a second fabricated wallboard, a third fabricated wallboard, an extrusion outer plate, a sealing air bag, an inflating bag and a wallboard base material; and the third fabricated wallboard is fixedly mounted on the outer wall of one side of the second fabricated wallboard. According to the fabricated wallboard with the gap sealing and water leakage preventing functions, by arranging the inflating bag, when the wallboard is assembled at ordinary times, the inflating bag can be extruded by the extrusion outer plate of the external assembly wallboard, internal air can be transmitted into a sealing air bag through an air guide pipe, and the sealing air bag expands to be attached to the outer top of a sealing gasket. The expanded sealing air bag and the attached sealing gasket can effectively fill the assembly gap of the fabricated wallboard, external water spots can be effectively prevented from seeping into the fabricated wallboard through the assembly gap, a traditional simple sealing waterproof design of a sealing rubber strip is abandoned, the sealing air bag and the attached sealing gasket can continuously keep the sealing effect, and the situation that the sealing performance is reduced is avoided.

The invention discloses a sealing method for impermeability test of concrete. The method comprises the following steps: step 1, maintaining a truncated-cone-shaped test block used for impermeability test, taking the test block in one hour before the impermeability test, cleaning the side surface of truncated-cone-shaped test block by wiping and removing burrs; step 2, uniformly smearing the side surface of truncated-cone-shaped test block with a weather-proof neutral silicone adhesive so as to form an annular sealing adhesive strip; step 3, cleaning a test block sleeve by wiping, sleeving the test block smeared with the weather-proof neutral silicone adhesive with the test block sleeve; step 4, spraying the weather-proof neutral silicone adhesive into gaps formed in joint of the test block and test block sleeve, flattening and compacting the gaps so as to form an annular adhesive ring on the surfaces of the gaps and carrying out indoor standing for 5.5 to 6.5 h until the annular adhesive ring on the surfaces of the gaps, thereby obtaining a treated test block; and step 5, loading the treated test block on an impermeability instrument for impermeability test. The method provided by the invention improves the efficiency of the impermeability test of concrete, reduces work intensity of testing personnel, saves cost and decreases environmental pollution.

The invention provides a high-temperature generator for a lithium bromide cold and warm water unit and a pipe expanding method. The high-temperature generator comprises pipe plates and heat exchanging pipes, and the heat exchanging pipes are inserted into holes of the pipe plates. The heat exchanging pipes are the titanium heat exchanging pipes, and the insides of the holes of the pipe plates and/or the outsides of the pipe ends of the titanium heat exchanging pipes are coated with silicone oil. The invention further provides the pipe expanding method of the high-temperature generator for the lithium bromide cold and warm water unit. According to the high-temperature generator for the lithium bromide cold and warm water unit and the pipe expanding method, on the one hand, by adopting the titanium heat exchanging pipes and compared with copper heat exchanging pipes, the quantity of utilized materials can be reduced by more than 70%; and on the other hand, the degree of difficulty of pipe expanding can be lowered, and airtightness is greatly improved.

The invention relates to a thrust bearing with a novel structure for a steering axle of a commercial vehicle. The invention belongs to the technical field of rolling bearings. The invention is mainly used for solving the problem that due to the existence of an outer cover in the thrust bearing for the steering axle, the mounting precision and the using performance are affected. The thrust bearing is mainly characterized by comprising an outer cover, a shaft ring, a seat ring, a sliding ring, a lantern ring, or a rolling body and a retaining frame, wherein a seat ring annular seal ring is arranged at the inner diameter of the seat ring; a shaft ring annular seal ring is arranged at the inner diameter of the shaft ring; a step is arranged at the chamfered part of the large end face of the shaft ring; the outer cover has a bottom face which is narrower than the large end face of the shaft ring, one end of the outer cover is lower than the outer end face of the seat ring, the outer bottom face at the other end of the outer cover is lower than the outer end face of the shaft ring, one end face of the outer cover is jointed with the oblique slope of the seat ring, and the bottom face of the outer cover is jointed with the step of the shaft ring; and a cylindrical seal ring is arranged between the shaft ring and the seat ring. The thrust bearing provided by the invention has the characteristics of good sealing and using performance and good precision in mounting and use, and is mainly used for the steering axle of the commercial vehicle.

Provided is a cryogenic fluid coupling (30) in which coalescence of male (10) and female coupling (20) is maintained even when the cryogenic fluid coupling is used alone while solving ice and gas purging problems, and which has satisfactory workability and a wide scope of application. The cryogenic fluid coupling is used to supply of cryogenic fluid between a storage tank and a mobile unit. A coalescing lock mechanism (8), which maintains or releases the coalescence of the male coupling member (10) and the female coupling member (20) in association with the coalescing linkage mechanism (1), is provided.

The invention provides a flame retardant polyurethane sealant which contains the following components in parts by weight: 65-85 parts of polyurethane resin, 6-12 parts of styrene-butadiene-styrene segmented copolymer, 2-5 parts of a plasticizer, 30-50 parts of filler, 2-8 parts of a cross-linking agent, 1-10 parts of a coupling agent, 1-3 parts of polyethylene wax, 4-8 parts of a flame retardant and 1-3 parts of an ultraviolet absorbent. The flame retardant is mainly prepared by modification with nanoscale magnesia-alumina hydrotalcite and polyaspartic acid. The flame retardant polyurethane sealant not only has good flame retardant performance, but also has good bonding performance.

The invention discloses a halogen-free flame-retardant polyurethane sealant which are prepared from the following components in parts by weight: 50 to 60 parts of polyurethane resin, 6 to 12 parts ofstyrene-butadiene-styrene segmented copolymer, 2 to 5 parts of plasticizer, 30 to 50 parts of filler, 2 to 4 parts of castor oil, 2 to 8 parts of cross-linking agent, 1 to 10 parts of coupling agent,1 to 3 parts of polyethylene wax, 4 to 8 parts of flame retardant, 0.5 to 1.5 parts of zinc borate and 1 to 3 parts of ultraviolet absorbent. The flame retardant is prepared mainly from nanoscale Mg-Al hydrotalcite and polyaspartic acid by modification. The halogen-free flame-retardant polyurethane sealant not only has excellent flame retardance and has no pollution, but also has excellent adhesive property.

The invention discloses a reversing sealing device of a low-temperature-resistant combined ring spacer sleeve valve rod forming valve. An electromagnetic pilot valve is arranged on one side of a valvebase, a piston is arranged inside an air inlet cavity, a valve body is arranged on one side of the valve base, a valve rod is arranged inside a working cavity, and one end of the piston is installedin a first inserting groove; a plurality of spacer sleeves are arranged on one side of the outer part of the valve rod, and a boss is arranged in the middle of one side of the two end surfaces of thespacer sleeves; a low-temperature-resistant combined ring is arranged between every two adjacent spacer sleeves, outer rings and lip edges are integrally formed, grooves matched with the bosses are formed between the outer rings and the lip edges, and one side of a valve body is provided with an end cover. According to the device, two end faces of the low-temperature-resistant combined ring are designed into groove structures correspondingly, and two end faces of the spacer sleeves are designed to be of boss structures; the running resistance at the moment of reversing the valve rod is reduced, meanwhile, the sealing performance of the electromagnetic reversing valve is not reduced after the reversing is completed, then the low-pressure starting and reversing performance of the electromagnetic reversing valve are further reduced, and the electric control reversing performance of the electromagnetic reversing valve is greatly improved.

The invention belongs to the field of bearings, and relates to a bearing and a seal assembly thereof, in particular to a high-temperature bearing and a seal assembly thereof. The existing seal washer with a standard structure is removed, outside diameters of a seal ring and a bearing inner ring are matched to realize sealing, the dimensions and quantity of spare parts are reduced, the angle and elastic deformation of a seal lip are designed scientifically, the sealability is not reduced, and the friction is reduced.

Seal ring provided between rotating portion and fixed portion in rotating machine of steam turbine and the like is improved to carry out predetermined movement accurately so as not to cause deterioration of sealing performance. Seal ring is split into upper, lower, right side and left side seal ring pieces 1a, 1b, 1c, 1d, contacting slidably with each other via split planes 3a, 3b, 3c, 3d with spaces 9a, 9b, 9c, 9d being formed in the respective split planes. Springs 4a, 4b, 4c, 4d are interposed in the spaces 9a to 9d for activation in upward and downward directions. The upper and lower seal ring pieces 1a, 1b are engaged with seal ring guides 5a, 5b and 6a, 6b and the right side and left side seal ring pieces 1c, 1d are engaged with seal ring guides 7, 8 so that all of the seal ring pieces 1a to 1d are slidable in the upward and downward directions. Further, on the respective tips of the seal ring guides 5a, 5b and 6a, 6b, spaces 10a, 10b of the upper seal ring piece 1a and spaces 10c, 10d of the lower seal ring piece 1b are formed and springs 11a, 11b, 11e, 11d are provided in the spaces 10a to 10d for activation in the upward and downward directions. The respective seal ring pieces are prevented from skirmishing with each other and the upper and lower seal ring pieces move toward the inner side at the time of load so as to make narrower the clearances between seal fins 2a, 2b and corresponding rotor surface.

The invention relates to a bottle cap which comprises an upper cap body, a middle section and an inner plug. The middle section is provided with a lower opening portion communicated with an upper opening portion and installed on a bottle opening portion in a sleeved mode, the outer wall of the upper opening portion is provided with external threads, the upper cap body is provided with internal threads matched with the external threads of the upper opening portion, the inner plug is in the shape of a hollow ring, the outer portion of the inner plug is wrapped by at least one layer of metal foil paper, a metal pipe which can move in the direction of the inner portion of a bottle to puncture or jack the metal foil paper is arranged in the inner plug, the inner plug comprises a constraint section and a seal section, the inner diameter of the constraint section is matched with the outer diameter of the metal pipe, and the outer diameter of the seal section is matched with the inner diameter of the bottle opening. The bottle cap is novel in conception and easy to manufacture, avoids the possibility that liquor makes contact with plastic when the liquor is stored, and therefore plasticizers in the plastic bottle cap are prevented from dissolving into the liquor; through the metal pipe, the contact time and the contact frequency of the liquor and the plastic are reduced when the bottle cap is used, tiny plasticizers enter the liquor, and therefore the plasticizers are controlled in a very low safety range.

The invention discloses a plastic composite membrane bag for packaging. The membrane bag comprises a body; the middle of the body is provided with a center dividing and cutting line, and easy-to-tearopenings of 11 rows time 6 columns made by adopting a shearing process are arranged on the center dividing and cutting line; left side easy-to-tear openings are formed in the leftmost side of the body, right side easy-to-tear openings are formed in the rightmost side of the body, and arc-shaped compensation edge sealing edges are arranged on the easy-to-tear openings, the left side easy-to-tear openings and the right side easy-to-tear openings correspondingly; the number of the left side easy-to-tear openings is 17, and the left side easy-to-tear openings comprise 6 edge easy-to-tear openingsand 11 secondary easy-to-tear openings; and the number of the right side easy-to-tear openings is 16, and the right side easy-to-tear openings comprise 5 edge easy-to-tear openings and 11 secondary easy-to-tear openings. According to the plastic composite membrane bag for packaging, a product is provided with the arc-shaped compensation edge sealing edges at the easy-to-tear openings, the left side easy-to-tear openings and the right side easy-to-tear openings correspondingly, so that the easy-to-tear openings are easy to find, the bag can be conveniently torn off from the position of the easy-to-tear openings, meanwhile, the sealing performance of the bag is prevented from being reduced, and the cutting waste is prevented from being generated when the easy-to-tear openings are processed.