37results about How to "Long-term sealing" patented technology

The invention discloses a supercritical carbon dioxide fracture-creepage-seepage test device for high-temperature high-pressure coal petrography. The device comprises a triaxial cell, a supercriticalcarbon dioxide generator system, an axle load and confining pressure loading system, an acoustic emission monitoring system, a temperature rise control system, a deformation-pressure monitoring systemand a permeability measuring system. The device is capable of realizing the supercritical carbon dioxide fluid fracture test of coal petrography under high temperature and high pressure, monitoring and recording the temperature and pressure changes of supercritical carbon dioxide and characteristics of fracture cracking and extension in the supercritical carbon dioxide fracture process in real time, monitoring and recording the axial and radial deformations of coal petrography samples in real time, directly and effectively measuring the DH4 permeability of the coal petrography before and after the fracture without unloading the coal petrography sample stress, and measuring the CH4 permeability of the coal petrography after the fracture under the action of creepage. The measurement methodis high in precision, intuitional and high in automation degree, and the device is simple in structure.

The invention discloses a high temperature and high pressure coal rock supercritical carbon dioxide fracturing-creep deformation-seepage experimental method. A supercritical carbon dioxide fluid fracturing-creep deformation-seepage experiment of coal rock is executed under high temperature and high pressure, change of temperature and pressure of the supercritical carbon dioxide and fracture crackinitiation and expansion features in a supercritical carbon dioxide fluid fracturing process are monitored and recorded in real time, and axial deformation and radial deformation of a coal rock sampleare monitored and recorded in real time, moreover, CH4 permeability of the coal rock before and after fracturing can be measured directly and effectively under a condition where coal rock sample stress is not cancelled, and measurement of the permeability of the CH4 of the coal rock under the creep deformation function after fracturing can be realized. The measurement method provided by the invention is high precise, visual and highly automatic, and devices used in the method are simple in structure.

The invention provides high temperature resistant well cementation cement paste used for a steam injection thermal production well, and the cement paste comprises the following components by weight: 100 parts of high temperature resistant cement, 30-40 parts of a high temperature stabilizer, 0.5-1.2 parts of a thickening time control agent, 2.5-4.5 parts of an oilwell cement fluid loss agent, 0.02-0.15 part of an anti sedimentation agent, 0.02-0.15 part of a defoaming agent, and 45-100 parts of water. The high temperature resistant well cementation cement paste can effectively solve the problems of quick reduction in strength, fast rising in permeability and the like of well cementation cement paste systems in the prior art, can improve the thermal stability, reduces the possibility of channeling and casing damage, can make oilwells long-term sealed, improves production efficiency, and reduces production cost.

The invention relates to an internal expansion groove type solar vacuum heat collection tube, which belongs to the technical field of solar heat collection facilities. The vacuum heat collecting tube includes an outer glass tube, the glass tube is set on the metal tube in the middle, and the metal tube is coated with a heat-absorbing coating. The middle of the metal tube is broken and connected by a wave expansion joint. The alloy transition pieces are respectively sealed with the extended ends of the two sections of metal tubes, the glass tube, the metal tube and the corrugated expansion joint are vacuumed to form a vacuum layer, and the middle part of the metal tube and the glass tube are respectively equipped with self-centering supports . The invention internally digests the expansion of the metal tube larger than the glass tube, simplifies the installation and connection structure; at the same time, it has sufficient strength and rigidity, and is convenient for system installation and integration, and is especially suitable for high-temperature and high-power solar thermal power generation and other occasions.

The invention discloses a rotary pluggable photoelectric combined connector used in deep sea. The connector includes a plug and a socket which are matched with each other, and the plug includes a plugshell body, a plug elastic capsule body, a plug web, a plug tail plate and a plurality of plug photoelectric insertion cores; the socket comprises a socket shell body, a socket elastic capsule body,a socket web, a socket tail plate, a plurality of socket photoelectric insertion cores and a movable cavity; the connector is also provided with rotary mechanisms capable of covering/uncovering channels cooperating with the socket photoelectric insertion cores and the plug photoelectric insertion cores, and a locking mechanism is arranged between the front end of the plug and the front end of thesocket. The rotary pluggable photoelectric combined connector can adapt to working environments different in depth, and is reliable in sealing, simple to operate and small in required strength for plugging and pulling.

The invention relates to the field of efficient fresh air filtering for automobile air conditioners and discloses an efficient fresh air filtering method and system for an automobile air conditioner. The method and system can be used for efficiently filtering out fine particular matters and harmful matters from fresh air for an automobile. The method is characterized in that after foul air is efficiently filtered through an air filter which is connected with an air conditioner fresh air filtering system shell in a sealed manner via an efficient sealing device and a double efficient sealing device, clean air is fed into the automobile. Meanwhile, a turbulence equalizer is used, so that the filtering effect on ultrafine particle matters is improved; by detecting the difference of air pressures at the front end and the rear end of the air filter, the work state of a draught fan is controlled, the air volume is enabled to be constant, and the replacement of the air filter is promoted; and an intelligent harmful gas and substance detector detects the quality of air in the automobile, and the work state of the fresh air system can be automatically controlled. The efficient fresh air filtering method and system for the automobile air conditioner have the following remarkable advantages that no extra space in the automobile is occupied; the safety is achieved, and the attractiveness is not affected; secondary pollution of ozone is not generated; the service life of a filter screen is long; and the efficient fresh air filtering method and system for the automobile air conditioner are suitable for fresh air filtration of automobile air conditioners of any type.

The invention discloses a high temperature and high pressure special regulating valve, which comprises a valve body, a valve cover, a valve seat, a valve cage, a valve plug and a valve stem. A built-in space, a valve seat is provided at the lower part of the built-in space; a valve cage is provided between the valve seat and the bonnet, and the valve cage includes an upper valve cage and a lower valve cage arranged from top to bottom, the upper valve cage and the lower valve cage There is an upper seal between them; there is a valve plug inside the cage, the valve plug is set above the valve seat, and a lower seal is provided between the valve plug and the valve seat; there is a valve stem inside the valve plug, the valve plug and The valve stems are connected by pre-positioning and anti-loosening threads. The upper part of the valve stem is installed in the center of the bonnet. There is a graphite packing between the valve stem and the bonnet. The high-temperature and high-pressure special regulating valve of the present invention can effectively improve the sealing performance of the valve at high temperature, withstand high pressure, reliability and versatility; it can be widely used in various automatic high-temperature and high-pressure regulating occasions.

The invention provides a damping rotary seal multi-rotary-hammer crusher. The crusher comprises upper and lower bearing housings, driving and driven transmission shafts, driving and driven gears, a bearing block ventilation cover and a bearing block stuffy cover and is characterized in that a crusher barrel is cylindrical; the bearing housings are installed at the upper and lower parts of the crusher barrel respectively; the upper and lower bearing housings are respectively connected with the bearing block ventilation cover and the bearing block stuffy cover; upper and lower tapered roller bearings are installed in the upper and lower bearing housings; the driving and driven transmission shafts penetrate through the bearing block ventilation cover; the middle parts of the driving and driven transmission shafts are arranged in the crusher barrel; the bottoms of the driving and driven transmission shafts are connected with the bearing block stuffy cover; sanding hammers are installed on the transmission shafts respectively and are connected with the transmission shafts by splines; a wearproof liner is installed in the crusher barrel; a wearproof liner damping sleeve is inlaid in the outer wall of the wearproof liner; a rotary seal ring is fixed together with the driving and driven transmission shafts via rotary seal ring set screws. The crusher has the characteristics of improvement of the work efficiency, reduction of the energy consumption, damping and noise reduction.

The invention relates to a parallel type advection plunger pump, which comprises a drive transmission module (1), a cylinder body plunger module (2) and a complete machine support (3). The parallel type advection plunger pump provided by the invention can be used for accurately and quantitatively conveying a required liquid, and a liquid flow is not influenced by backward-stage pressure fluctuation, so that the liquid is ensured to be output continuously and stably. The device provided by the invention is mainly used in a water purification system in an environmental control and life support subsystem in a space station, provides current-rated water to be treated to a purifier, can ensure the output accuracy to be unaffected when the pressure in the purifier is changed, and has the characteristics of accuracy in supplying, capability of being unaffected by backward-stage pressure, high output efficiency and output continuousness. The device provided by the invention adopts a novel series seal structure, so that the product processing difficulty is reduced, the product accuracy is ensured, the requirements on sealing reliability and long service life of the plunger pump are met, thereliable operation of a water purification system is ensured, and a special working condition demand can be met.

The invention belongs to the technical field of sealing, and particularly relates to a flexible graphite gasket with concave arc inner and outer rings. The flexible graphite gasket is formed by combining an inner ring, an outer ring and flexible graphite, the flexible graphite is arranged between the inner ring and the outer ring, the sides, making contact with the flexible graphite, of the innerring and the outer ring are each provided with a concave arc, due to the fact that the flexible graphite is pressed between the inner ring and the outer ring and the existence of the concave arcs of the inner ring and the outer ring, the flexible graphite cannot be disengaged from the inner ring and the outer ring, and therefore, the flexible graphite, the inner ring and the outer ring form a whole gasket. Due to the fact that the flexible graphite is located between the inner ring and the outer ring and is pressed into a whole, even if the gasket is installed in an incompletely-closed space,the gasket cannot be lost due to scouring of fluid media, and the sealing performance can be kept for a long time.

The invention discloses insertion sealing equipment and a using method, the insertion sealing equipment comprises a sealing seat and a sealing mechanism, an axial through hole is formed in the center of the sealing seat, and the sealing mechanism is arranged on the outer wall of the sealing seat in a sleeving mode; the sealing mechanism comprises an upper sealing unit, a lower sealing unit and an adjusting ring which are arranged outside the sealing seat in a sleeving manner; the upper sealing unit and the lower sealing unit are of the same structure and are symmetrically arranged. The inner wall of the adjusting ring is in screwed connection with the outer wall of the sealing seat; the upper end face of the adjusting ring makes contact with the bottom of the upper sealing unit, and the lower end face of the adjusting ring makes contact with the lower sealing unit. The device has the cable penetrating and well washing functions, and the purposes of long-acting sealing, safe tripping-in and convenient use are achieved.

The invention belongs to the technical field of sealing, and particularly relates to a flexible graphite gasket with V-shaped with an inner ring and an outer ring with V-shaped protrusions. The flexible graphite gasket with V-shaped with the inner ring and the outer ring with the V-shaped protrusions comprises a flexible material, and the inner ring and the outer ring are arranged at the two endsof the flexile material correspondingly. The gasket sleeves the end of a pipeline to be sealed. The flexible graphite gasket has the remarkable effects that flexible graphite is located between the inner ring and the outer ring to be pressed into a whole, and therefore even though the gasket is mounted in an incompletely sealed space, the gasket cannot be scoured by a fluid medium to run off, andthe sealing performance can be kept for a long time.

The invention relates to a hose connection flange. The hose connection flange comprises a butt joint sealing head, a flange pressing plate, a flange body and a seal ring. The butt joint sealing head and the flange pressing plate are combined in a sleeving manner. The butt joint sealing head and the flange body are matched through conical face structures of the butt joint sealing head and the flange body. The seal ring is arranged between the conical face structures of the butt joint sealing head and the flange body. The seal ring is unceasingly compressed through the locking effect of a locking mechanism so that sealing can be achieved. By means of a sealing device formed by matching the arranged rotatable flange pressing plate with the conical face structures between the butt joint sealing head and the flange body, long-acting sealing of pipeline connection is achieved, the offshore construction time is remarkably saved, and operation and maintenance are convenient.

The invention discloses a compensable rocker arm sealing device which enables the joint of a rocker arm and a grinding roller to be sealed and can prevent air outside a vertical roller mill from entering the mill and affecting the internal and external pressure difference of the mill in the using process of the vertical roller mill. According to the sealing structure, a grinding roller door, a sealing base, a sealing frame, a sealing air bag and a pressing plate are matched with one another to achieve the sealing effect, the sealing air bag has elasticity, the whole structure has the compensation effect, and therefore it is guaranteed that the rocker arm can still achieve sealing in the continuous rotating process, and the sealing effect of the whole device can be improved.

The invention discloses a flame path partitioning structure, in particular to a flame path partitioning structure between oven chambers of an open type anode roasting oven in the production field of carbon for aluminum. The flame path partitioning structure comprises an oven chamber flame path inside a system, an oven chamber flame path outside the system and a crosswall, wherein flame through holes are arranged among the crosswall, the oven chamber flame path inside the system and the oven chamber flame path outside the system, flame path partition plates in the fire through holes are inserted to U-shaped sealing grooves at the bottoms and the two sides of the flame through holes, slot bricks fixed on the crosswall are arranged above the flame through holes, oven surface slot building blocks are arranged above the slot bricks, the upper parts of the flame path partition plates pass through the slots of the slot bricks and are arranged in the slots of the oven surface slot building blocks, and partition covers are arranged above the flame path partition plates. The flame path partitioning structure improves the partition action between the corresponding oven chamber flame paths inside and outside the system, enhances the sealing performance of the oven, effectively reduces the suction volume of cold air outside the system, can keep the sealing performance for a long term, has simple structure and is easy to implement.