168results about How to "Safe and reliable sealing" patented technology

A valve for controlling liquids which for its actuation is provided with a liquid-filled coupling chamber, which is disposed between an actuator piston of a piezoelectric actuator and a piston that actuates a valve member. To compensate for liquid losses suffered by the coupling chamber, which is briefly at high in each work cycle, the pressure difference that exists during the return stroke of the actuator piston between the coupling chamber and the opposite sides of the actuator piston and of the that actuates the valve member that are remote from the coupling chamber is utilized to achieve refilling in valveless fashion along gaps. The valve is used for use in fuel injection systems for internal combustion engines of motor vehicles.

The invention relates to a non-contact mechanical end surface sealing structure, which comprises mechanical sealed movable ring and stable ring. While the end surface of stable or movable ring has micro groove and porous zone that symmetry according to the rotational center. Wherein, said zone is at the ascending part of end surface and the micro groove is at the descending part, which has a circular sealing dam beside it. The invention can be used in variable mediums to increase the ability of solid particle, the static pressure property, fluid dynamic pressure property and the pump adsorption property, to attain better sealing effect, with long service life.

An ignition laser, includes a laser-active solid-state body, a housing and a combustion chamber window, the housing having an inner sleeve and an outer sleeve. An insert is provided between the inner sleeve and the outer sleeve, the insert and the combustion chamber window being joined sealingly and integrally.

The invention relates to a sealing method of a fastener. The sealing method comprises the following steps of: selecting a sealing cap with the size matched with the fastener; injecting sealant with the 2/3 of volume into the sealing cap by using a sealant injector; and buckling the sealing cap on the fastener head perpendicularly and pressing tightly with a hand so that the bottom edge of the sealing cap is tightly attached to the surface of the structure.

The invention provides a novel material pressure-out ball for a multi-stage slide sleeve staged fracturing pitching opening-type slide sleeve. The novel material pressure-out ball employs main materials such as polybenzimidazole and polyetheretherketone. The main function of the pressure-out ball is that with the pressure-out ball, pressure-out sealing can be rapidly and reliably realized, pitching slide sleeve can be opened, and fracturing can be realized. The pressure-out ball has substantial characteristics that: (1) the density is low, wherein the density is 1.5-1.6g/cm<3>, such that the capacity of pressure-out ball for rapidly moving forward in a horizontal state can be improved, and backflow is easy; (2) a composite material with main components of polybenzimidazole and polyetheretherketone is adopted, such that a high impact strength is provided, and the abrasion of the pressure-out ball in a forward moving process is small, such that reliable sealing can be realized; (3) a pressure resistance is high, wherein as a result of experiments, no damage is caused under a high pressure of 70MPa; and (4) time is saved, and construction risk is reduced.

The invention discloses a cubage segmentation-typed liquid-injection and a sealing method for a silicon-based micro-heat pipe. By twice precise cubage segmentation to an enclosed space consisting of the silicon-based micro-heat pipe and an injector, little working liquid is taken out of the working liquid and the air in the sealing space; furthermore, two fine metal pipes used for connecting the liquid injection holes are sealed so as to retain the liquid in the micro-heat pipe, thus precisely controlling the charge liquid proportion of the micro-heat pipe. As the whole process is carried out in an enclosed small space, the liquid is isolated from the environmental air during the whole operation process, thus ensuring the working efficiency of the micro-heat pipe. The method avoids the step of vacuuming, and only requires two injectors and a heating device for the operation; the usage amount of the silicone sealant and the working liquid is small; the control method is simple, requiring only the heating temperature and the calibration of the injector to be adjusted; and the sealing is safe.

The invention relates to a sealing execution mechanism and a full-shielding valve with an electromagnetic driving mechanism arranged inside and including the sealing execution mechanism, and belongs to the technical field of fluid machines. The full-shielding valve comprises a full-shielding assembly, a stator and a rotor. The full-shielding assembly comprises a shielding sleeve, a shielding sleeve end cover and a heat insulation support. The full-shielding assembly can bear fluid pressure in a valve body, and a formed pressure bearing cavity isolates a valve rod and the interior of the valve body from the outside. A dynamic sealing point of the valve rod is eliminated, and full-shielding sealing is achieved. A rotary electromagnetic field generated when a stator coil is powered on and a magnetic field generated by a rotor permanent magnet interact, generated electromagnetic torque penetrates the full-shielding assembly to be transferred to the rotor in a non-contact manner, and the rotor directly drives the valve rod to rotate through a transmission key. Effective driving of the valve under the full-shielding sealing condition is achieved.

Apparatus with facing bell members, for modified-atmosphere packaging of products placed in trays, which comprises means for the cyclic positioning of an extended portion of bather film between the said two open bell members and over trays housed with gasket means in the seats of the bottom bell member, which comprises means for moving the said bell members towards each other so as to close between them the said film and to close under and at a suitable distance from this latter the edge of the tray, apparatus of the type that when the bell members are closed, they form therein two volumes not directly communicating, one of which is formed by the internal chambers of the same bell members that communicate with each other via circuits, for example peripheral, while the other volume is formed by the main chambers of the trays with the product, wherein the said chambers are connected with a portion of their perimeter to holes and to a dedicated circuit for the controlled introduction of process gases and are connected with another portion of their same perimeter to discharge holes for implementation of the air extraction and washing steps, comprising internal valve means to enable the said discharge holes of the main chambers of the trays to communicate, or not, with the said internal chambers to balance the differences in pressures between the said two volumes during the exchange cycle of the gases required to produce packaging of the type known as MAP.

The invention relates to a mixing machine, in particular to a novel sealing mechanism for a shaft end of the mixing machine. The novel sealing mechanism for the shaft end of the mixing machine comprises a sealing seat (4) and a sealing cover (1), wherein the sealing seat (4) and the sealing cover (1) are installed on a main shaft (5) in a sleeved mode. The novel sealing mechanism further comprises an abrasion-resistant sleeve (6), a first oil seal (7), a space ring (8) and a second oil seal (10). The sealing cover (1) is connected on the end face of one side of the sealing seat (4). A through hole (4-1) is formed in the sealing seat (4), an air inlet connector (3) is arranged at the position of the through hole (4-1), the sealing cover (1), the first oil seal (7) and the second oil seal (10) are installed on the outer diameter of the abrasion-resistant sleeve (6) in a sleeved mode, the outer diameters of the first oil seal (7) and the second oil seal (10) are installed in a hollow cavity on the front portion of the sealing seat (4) in a clamping mode, and the space ring (8) is installed between the first oil seal (7) and the second oil seal (10). The novel sealing mechanism is provided with multiple and various seals, the phenomenon of material leakage or powder injection does not occur, a sealing effect is good, and sealing is safe and reliable.

The invention discloses a preparation method of a pure-phase Li2Si2O5 rodlike crystal. After LiOH.H2O is dissolved in distilled water, tetraethyl orthosilicate is dropwise added, the mixture is uniformly mixed, a mixed solution is obtained, the mixed solution is placed in a hydrothermal reaction liner to react to obtain a white precipitate, the white precipitate is subjected to suction filtration,a filter cake is obtained, the filter cake is dried again, white powder is obtained and ground, and the pure-phase Li2Si2O5 rodlike crystal is obtained after heat treatment. The method is simple to operate, low in equipment requirement, wider in parameter range, easy to control and high in yield, the price of raw materials is low, the size of the obtained rodlike crystal is adjustable, the structural strength is high, and the method is suitable for mass commercial promotion.

A pneumatic connection for connecting two modules (6) with one another into a simple and reliable pneumatic connection of modules (6) of the respirator or anesthesia apparatus (5). A small installation space needed is provided in a respirator or anesthesia apparatus (5), including at least two modules (6), e.g., a blower, a breathing system, a mixer and/or an anesthetic evaporator (11, 12, 13, 14). The at least one pneumatic connection includes a connection tube (1), which is surrounded with a first end (9) by a first module (7) and with a second end (10) by a second module (8), so that there is a pneumatic connection through the connection tube (1) between the first module (7) and second module (8). The reliable pneumatic connection is also established when the modules (6) have an offset in their alignment in relation to one another.

The invention discloses a water purifying device, which comprises a water purifying component, a water pump, a rear filter element and an electronic floating ball switch for controlling water discharge, which are connected in series in turn by a water circuit, and is characterized in that the water purifying component, the water pump, the rear filter element and the electronic floating ball switch are arranged respectively and independently on a base. The water purifier for the split instant filtering water dispenser has the characteristics of convenience for detachment, cleaning and adding water, small volume, low purchase cost, simple structure and the like.

The invention relates to a cylinder assembly 1 for a longitudinally flushed stroke piston combustion engine and especially to a large-size two-stroke diesel generator moving slowing and flushing longitudinally. The cylinder assembly 1 includes an air cylinder provided with a combustion room 200 and an entrance area 22. A piston 3 moving back and forward long a cylinder axis Z is installed between an upper dead point and a lower dead point in the cylinder 2. And a flushing air entrance 4 is arranged in the cylinder 2 to facilitate to lead the flushing air 4 into the combustion room 200. The cylinder arrangement comprises a piston (3) which is provided as two piece piston. A mantle piston (32) is provided with a piston ring (33), where a main piston (31) is positioned in the mantle piston. A retaining device is provided at a cylinder for the mantle piston. The rinsing air (41) is introduced from an inlet area (22) to a combustion chamber (200) by the rinsing air opening (320) of the mantle piston.

The invention provides a deodorizing floor drain, and belongs to the technical field of buildings. The problems that an existing floor drain is unsmooth in water drainage, and seal ineffectiveness is not likely to occur are solved. The deodorizing floor drain of the improved structure comprises an outer cylinder, an inner cylinder and a panel, wherein the inner cylinder is provided with a water inlet and a water outlet, the panel is located above the inner cylinder, and a seal plate is arranged inside the inner cylinder. The deodorizing floor drain is characterized in that the seal plate is in a dish shape and is located at the water outlet, the edge of the seal plate is wrapped with a seal part, the seal part comprises a round body and a seal portion, the section of the round body is in a U shape, the seal part extends outwards from the body, and the seal portion of the seal part abuts against the water outlet in the inner cylinder. The deodorizing floor drain of the improved structure is smooth in water drainage and stable in sealing.

The invention discloses a sealing structure for a side door of a blowout preventer. The sealing structure is used for sealing a side door and a casing and comprises a sealing ring and a casing sealing surface. The sealing ring is arranged on the side door and comprises a side door sealing framework, an extruding proof steel wire gauze and sealing rubber which are vulcanized into a whole; and the casing sealing surface is opened on the casing and matched with the sealing ring. The sealing rubber is provided with a convex arc sealing surface and a concave arc sealing auxiliary surface respectively. The sealing structure can bear high pressure, the sealing is safe and reliable, the mounting and dismounting is convenient, and finish requirements for side door planes can be appropriately reduced.

The invention discloses molecular adhesive used for TPZ waterproof rolls and a preparation method of the molecular adhesive. The molecular adhesive comprises, by weight, 50-70 parts of asphalt, 8-15 parts of second-vacuum naphthenic oil, 5-10 parts of SBS rubber, 3-8 parts of SBR rubber, 2-5 parts of chloroprene rubber, 1-3 parts of nitrile rubber, 3-8 parts of oil resin, and 5-10 parts of calcium powder. The adhesive layer formed by the adhesive can be fused and adhered at low temperature, and the molecular adhesive is good in adhesive sealing performance and is used for TPZ waterproof rolls, and performance of the TPZ waterproof rolls is improved.

An ink path through which ink is delivered from an ink source to a printhead unit includes an ink tube and a joint. The ink tube has a first layer formed of a material with low vapor and gas permeability and a second layer radially thicker than the first layer and formed of a flexible material. The joint has a maximum-diameter portion whose outer diameter is larger than an inner diameter of the ink tube. The joint is inserted into the ink tube. Further, a locking member is fitted over the ink tube. The locking member has an inner-diameter portion whose inner diameter is smaller than an outer diameter of a connection between the maximum-diameter portion of the joint and the ink tube.

The invention is a smoke insulating damper-throttle relating to a insulating block used for smoke switch and insulation in smoke desulphurizing system, it can realize insulation to smoke with simple and reliable structure, the throttle includes a valve of a closed structure valve board with a sealed cavity, a middle media control switching valve, a electric executing mechanism; the electric executing mechanism, the middle media control switching valve are at two sides of the valve, the self-closed structure valve board with sealed cavity is in the valve, one end is connected to the outer electric executing mechanism, another end is connected to the outer middle media control switching valve, the middle media control switching valve and the hollow part of the self-closed structure valve board are connected; the valve board can be driven by the electric executing mechanism to rotate 90 degrees, at the same time, it drives the middle media control switch valve to rotate 90 degrees. It integrates the middle media control switch system and the valve board control, it guarantees the safety and reliability of the seal.

A single mechanical seal with an elastic sealing ring and a double mechanical seal with an elastic sealing ring are used for preventing fluid with certain pressure in a working container from leaking out of the working container along a rotary shaft penetrating through the working container. The single mechanical seal with the elastic sealing ring and the double mechanical seal with the elastic sealing ring respectively comprise a shaft sleeve installed on the rotary shaft in a sleeved mode, a sealing box located outside the shaft sleeve and a friction pair arranged between the sealing box and the shaft sleeve, wherein the friction pair comprises a floating ring assembly and a fixed ring assembly, and a floating friction ring in the floating ring assembly achieves the sealing and floating supporting by means of the elastic sealing ring arranged outside the floating friction ring, a sealing ring leaning piece on the lower pressure side of the floating friction ring and a spring abutting against the non-friction end of the floating friction ring. The floating effect of the floating friction rings is good, good sealing performance can also be kept even when the rotary shafts jump or swing by a large amplitude, the manufacturing difficulty of the parts is small, cost is reduced, and meanwhile the size of the mechanical seals is reduced so that design and installation are facilitated and materials are saved.