50results about How to "Simple sealing method" patented technology

The invention relates to a full-automatic wrapping vacuum packaging machine, comprising a conveying mechanism for substances to be packaged, an adhesive film distribution mechanism, a vacuum treatment mechanism and a finished-product output mechanism, wherein the conveying mechanism for the substances to be packaged comprises an emptying area A and an emptying area B; the adhesive film distribution mechanism is arranged between the emptying area A and the emptying area B, and comprises an upper packaging and distributing mechanism, a lower packaging and distributing mechanism and a sealing-cutting mechanism; the sealing-cutting mechanism comprises an upper sealing-cutting die and a lower sealing-cutting die which are driven by a power mechanism, and the upper sealing-cutting die is combined with the lower sealing-cutting die for cutting off and binding an upper adhesive film and a lower adhesive film which are used for coating the substances to be packaged; and the vacuum treatment mechanism comprises a conveying belt and a heating and binding mechanism. The vacuum packaging machine provided by the invention can perform vacuum package by utilizing at least three methods, thus the vacuum packaging machine can be used in diversified modes, and the scope of application is quite wide.

The invention discloses gas extraction equipment and method based on an alternation thought. The equipment comprises a sealing cavity, a loading mechanism, a gas supplying-controlling system, a gas alternating-controlling system, a gas flow dynamic monitoring system and a data acquiring computer, wherein a circular hole is formed in the center of a sealing cover at the upper end of the sealing cavity; a loading column passes through the circular hole to apply a load to coal-rock mass inside the cavity; the gas alternating-controlling system comprises a negative pressure extraction sub-system and a cracking displacement sub-system; the negative-pressure extraction sub-system comprises a gas extraction pump; the cracking displacement sub-system comprises a high-pressure water pump, an aeration tank and cracking displacement screen pipes; the high-pressure water pump, the aeration tank and the gas extraction pump are connected with the cracking displacement screen pipes of different lengths inside the coal-rock mass through pipelines; the gas supplying-controlling system and the gas flow monitoring system are connected with an aeration pipeline and an extraction pipeline respectively. By adopting the gas extraction equipment and method, hydraulic fracturing permeability improvement of coal mass and alternate gas extraction are realized, and the gas extraction efficiency is increased effectively.

The invention relates to a high-pressure gas bottle and an inflating method thereof. The high-pressure gas bottle comprises a bottle nozzle which is provided with a gas bottle opening, the gas bottle opening is a ladder outlet with a smaller inner part and a bigger outer part, an inflating plug is arranged at a wide mouth section of the ladder outlet in a revolving mode through screw threads, the inflating plug is provided with a gas outlet channel communicated with the gas bottle opening, a sealing membrane is arranged at the outer port of the gas outlet channel in a sealing mode, and the ladder end face of the opening forms a sealing fit with the inner side end face of the inflating plug. The inflating plug is firstly unscrewed for 1 to 3 circles when inflating, gas is inflated to the gas bottle through thread gaps between the inflating plug and the bottle nozzle, the inflating plug is screwed for sealing when the inflation is over, and then sealing weld is set on the end face of the bottle nozzle so as to realize sealing between the inflating plug and the gas bottle opening. The inflating plug is arranged in the gas bottle opening in a revolving mode, gas is inflated to the gas bottle through the thread gaps between the inflating plug and the bottle nozzle, and the inflation is simple, safe and reliable.

The invention relates to a method for sealing a liquid reservoir for a liquid flow battery, which comprises the following steps of: installing a seal cover on the liquid reservoir, filling the liquid reservoir with electrolyte, and sealing the liquid reservoir; indirectly sealing the sealed liquid reservoir with liquid or gas. The pressure in the liquid reservoir indirectly sealed by the liquid or gas always stays at one standard atmospheric pressure. The liquid or gas used for indirect sealing is sealing liquid or sealing gas. The sealing liquid or sealing gas and the liquid reservoir are connected through a conduit. One end of the conduit is outside the liquid reservoir. The invention has the advantages that the sealing method is simple, convenient and efficient; the problem of inconsistent charging states of battery anode and cathode caused by oxidation of low-valence ions and the problems of ion permeation, water permeation, membrane aging and the like caused by the problem of pressure unbalance are solved; the service life of the membrane can be effectively prolonged; and the coulomb efficiency of the liquid flow battery is improved and the service life of the liquid flow battery can be effectively prolonged.

The invention relates to an automotive battery pack system, which comprises a battery pack module, a battery pack box, a temperature control system, a fixed guiding structure and a sealed damping system, wherein the temperature control system is fixed on the bottom of the battery pack box; the battery pack module is fixed in the battery pack box and is arranged above the temperature control system; and the sealed damping system is arranged on the battery pack box. The battery module design breakthrough the limitation of battery shapes, and the chassis space of a vehicle body is fully and reasonably utilized; and the temperature control system controls the inflow of cold or hot air and the flow of the cold or hot air to ensure the normal work of the battery pack system.

The invention discloses a self-calibration gas chamber which comprises an encapsulation box and a shell, a first optical collimator and a second optical collimator which are encapsulated and fixed in the encapsulation box. The shell is provided with a gas holding chamber used for holding self-calibration gas and a first fixing seat and a second fixing seat which are symmetrically arranged on two sides of the gas holding chamber, and the first optical collimator fixed on the first fixing seat and the second optical collimator fixed on the second fixing seat are aligned with each other; first tail fiber of the first optical collimator and second tail fiber of the second optical collimator are respectively led out from optical fiber exits in two sides of the encapsulation box. The self-calibration gas chamber is simple in structure, easy to manufacture, simple in optical path adjusting manner and high in leakage, and high measurement precision is guaranteed; meanwhile, the invention further discloses a distributed optical fiber methane sensing system applying the self-calibration gas chamber.

The invention provides an automatic feeding device for a powder mixing machine. The automatic feeding device comprises a rack provided with a conveying channel. A cap opening station, a turnover station and a cap falling station are arranged on the rack in the advancing direction of the conveying channel sequentially. Positioning and clamping devices are arranged on the two sides, corresponding to the cap opening station, the turnover station and the cap falling station, of the rack. A cap taking and placing device matched with a raw material barrel on the cap opening station and the cap falling station is arranged on one side of the rack; a barrel turning device is arranged on the other side, corresponding to the turnover station, of the rack. The automatic feeding device for the powder mixing machine is capable of achieving full automation, reasonable in whole structure and high in working efficiency; the requirement of the pharmaceutical production process can be met.

The invention discloses an installing method of an automotive under mirror lamp. The installing method is used for installing the automotive under mirror lamp in a housing of a rearview mirror. The automotive under mirror lamp comprises a lamp body and an installing structure, wherein the lamp body comprises a lamp housing, a circuit board and a reflecting bowl. The installing method comprises the following steps that step one, the circuit board and the reflecting bowl are connected in a riveted mode and fixed to form a circuit board assembly; step two, the riveted circuit board assembly is put into a housing body of the lamp housing, two bolts inwards penetrate into the bottom of the housing and are respectively matched with threads of two inner threaded columns to fix the circuit board assembly to the bottom of the housing and enable led-out wiring harnesses to penetrate through wire via holes, and the circuit board is fastened between the reflecting bowl and the bottom of the housing at the moment; step three, a lampshade and the housing cover the outer-end opening position of the housing and are connected in an ultrasonic welding mode to complete installation of the lamp body; step four, the lamp body is installed on the inner surface of the bottom of the housing of the rearview mirror.

The invention discloses a control tool for fabricated type building seam sealing and a construction method. The control tool comprises a sealing and blocking section, a hand-held section, a connectingsection and a removal limiting member, wherein the sealing and blocking section extends into a seam from outside to inside, the hand-held section is located in front of the sealing and blocking section and located on the outside of the seam, the connecting section is connected between the sealing and blocking section and the hand-held section, and the removal limiting member is arranged on the outer side of the rear part of the sealing and blocking section. The construction method comprises the steps that first, the tool is controlled to move in place; and second, the seam sealing construction is carried out, specifically, the control tool for fabricated type building seam sealing is adopted to divide the seam into a plurality of seam sections to perform seam sealing construction from back to front correspondingly. According to the control tool for fabricated type building seam sealing and the construction method, the design is reasonable, using operation is simple, the using effect is good, the inlet amount and the inlet distance of seam sealing materials entering the seam are limited by the sealing and blocking section limiting the seam sealing materials in the seam, and the grouting connection quality of a steel bar sleeve is guaranteed; and meanwhile, the seam sealing materials are not required to be smeared on the outside of the seam, the amount of the seam sealing materials can be effectively reduced, the construction cost is saved, the construction difficulty is reduced, the construction efficiency is improved, and sealing quality is improved.

The invention discloses a composite pipeline hot tapping plugging method which comprises the following steps: firstly carrying out hot tapping on a steel lining composite pipe by adopting tapping equipment, wherein a cut-off saddle-shaped piece is taken out by a center drill; measuring the external diameter of the saddle-shaped piece and the diameter of an open pore in the steel lining composite pipe, and making a sealing ring according to the size different for later use; chamfering the acute angle of a cutting surface of the saddle-shaped piece into an obtuse angle, smearing adhesive to the surface of the saddle-shaped piece, and arranging the sealing ring on the cutting surface to form a plug used for the open pore; after other construction operations are completed, sending the plug to the home position of the open pore in the composite pipe by adopting a mechanical method, and fixing with a three-way snap ring, thus completing plugging of the open pore of the composite pipe. The method has the advantages that the sealing method is simple, the sealing effect is good, plugging sealing of the open pore is performed by adopting a method of using the saddle-shaped piece cut off by tapping and the sealing ring, and the material cost is low, thus well solving the difficulty of sealing of an adhered part of a steel pipe and an inner lining pipe at the pipe wall of the open pore after plugging construction of the steel lining composite pipe is completed.

The invention discloses a sealing element having function of overall sealing in a length direction and at two ends in a long tube-shaped light fitting, and a unit body light fitting comprising the sealing element. The sealing element comprises at least two sealing strips (101) positioned at a middle part and a left sealing end (102) and a right sealing end (103) positioned at the two ends, wherein the inner sides of the left sealing end (102) and the right sealing end (103) are provided with a cavity (104) respectively; two ends of the sealing strips (101) are fixedly connected with the innerend faces of the cavities (104); the inner end faces of the cavities (104) are provided with annular grooves (105); and the annular grooves (105) are matched with the shape of an end cross section ofa sealed tubular object. In the unit body light fitting of the invention, the sealing element is matched with a special structure of a section material and is matched with a left end cover and a right end cover to achieve the overall seal of the unit body light fitting and also facilitate the disassembly and the replacement of an internal circuit board and an LED light source, and the water resistance is good.

The invention discloses gas extraction equipment and method based on an alternation thought. The equipment comprises a sealing cavity, a loading mechanism, a gas supplying-controlling system, a gas alternating-controlling system, a gas flow dynamic monitoring system and a data acquiring computer, wherein a circular hole is formed in the center of a sealing cover at the upper end of the sealing cavity; a loading column passes through the circular hole to apply a load to coal-rock mass inside the cavity; the gas alternating-controlling system comprises a negative pressure extraction sub-system and a cracking displacement sub-system; the negative-pressure extraction sub-system comprises a gas extraction pump; the cracking displacement sub-system comprises a high-pressure water pump, an aeration tank and cracking displacement screen pipes; the high-pressure water pump, the aeration tank and the gas extraction pump are connected with the cracking displacement screen pipes of different lengths inside the coal-rock mass through pipelines; the gas supplying-controlling system and the gas flow monitoring system are connected with an aeration pipeline and an extraction pipeline respectively. By adopting the gas extraction equipment and method, hydraulic fracturing permeability improvement of coal mass and alternate gas extraction are realized, and the gas extraction efficiency is increased effectively.

The invention discloses a double-mandrel direct-connection precise rotating shaft. The double-mandrel direct-connection precise rotating shaft comprises a main mandrel and a mandrel, wherein the mandrel penetrates and is fixedly connected with a wave generator of a harmonic reducer, the large end of the main mandrel is fixedly connected with a flexible gear of the harmonic reducer, a rigid gear of the harmonic reducer is fixedly connected with a B shaft outer cover, a first contact ball bearing and a second contact ball bearing are fixed on the inner side of the B shaft outer cover, which is close to the harmonic reducer, a third contact ball bearing and a fourth contact ball bearing are fixed on the inner side of the B shaft outer cover, which is far away from the harmonic reducer, inner rings and outer rings of the first, second, third and fourth contact ball bearings are connected with inner and outer ring sleeves respectively, and a first flange and a second flange are disposed at two ends of the B shaft outer cover. According to the double-mandrel direct-connection precise rotating shaft, two mandrels are arranged inside, and the small mandrel drives the large mandrel through the harmonic reducer.

The invention discloses a detection device based on a SAW sensor, which can realize the sealing of biological detection liquid and the sealing method is low in cost, simple and effective. The detection device includes a base plate, a base body, and a SAW chip. A detection circuit is arranged on the base plate; The wafer is arranged in the wafer groove and fixed on the base plate. The groove bottom of the wafer groove is provided with an annular groove, and a sealing ring is arranged in the annular groove. The sealing ring is in common with the induction film of the SAW and the groove bottom of the wafer groove. A closed detection space is formed, and a drainage hole is opened in the middle of the annular groove. The detection device prevents the biological detection liquid from leaking, and at the same time can ensure more accurate detection results, and the biological detection liquid can easily flow into the detection space due to the existence of the drainage hole. It is suitable for popularization and application in the technical field of detection equipment.

The invention discloses a grouting joint for double-shield TBM construction. The joint comprises a grouting pipe, an elastic element and a driving part, wherein the grouting pipe is used for being inserted into a grouting hole of a segment, the elastic element is arranged on the peripheral portion of the grouting pipe in a sleeving mode, one end of the grouting pipe is provided with a limiting part for axially limiting the elastic element, the driving part is arranged at the other end of the grouting pipe and is used for applying axial pressure on the elastic element, and after the elastic element is pressed and deformed, a gap between the grouting pipe and the grouting hole is sealed. According to the grouting joint for double-shield TBM construction, the axial pressure is applied to theelastic element through the driving part, and the elastic element is axially limited in combination with the limiting part, so that after the elastic element is pressed and deformed, the gap between the grouting pipe and the grouting hole is sealed; and the sealing mode is simple, the operation is simple, the axial pressure is applied to the elastic element through the driving part, the gap between the grouting pipe and the grouting hole is sealed after the elastic element is integrally deformed, the sealing uniformity is good, the sealing effect is good, and the adverse phenomena such as slurry return and slurry leakage can be prevented.

The invention provides an automatic feeding device for a powder mixing machine, which includes a frame with a conveying channel, and the frame is sequentially provided with a cover opening station, a turning station and a cover drop along the forward direction of the conveying channel. station, the two sides of the frame corresponding to the uncapping station, flipping station and cap dropping station are respectively provided with positioning and clamping devices, and one side of the frame is provided with a The pick-and-place lid device matched with the raw material bucket on the lid-dropping station, and the bucket-turning device is installed on the other side corresponding to the flipping station. The automatic feeding device can be fully automatic, has a reasonable overall structure, high working efficiency, and meets the requirements of the pharmaceutical production process.

The invention relates to a method for applying oxidized PE wax to sealing protection of a circuit board. The method comprises the steps that the surface of the circuit board is coated with a layer ofcoupling agent, and air drying is conducted; the circuit board is dehumidified; a tackifier and a liquid toughening agent are added into the molten oxidized polyethylene wax to be uniformly mixed to prepare molten wax; the dehumidified circuit board is immersed in the molten wax for sealing, and after sealing is completed, the circuit board is placed on release paper and dried. By means of the sealing method, the defects that the oxidized PE wax easily cracks at the low temperature and has poor adhesion force are overcome; the tackifier and the toughening agent is added according to a ratio through repeated experiments, and finally, the oxidized PE wax can meet the requirement of the circuit board for effective waterproof and moisture-proof sealing in the working environment at minus 20-60DEG C. By means of the method, the good acid and alkali resistance, electrolytic-resistance chemical stability and hydrophobicity of the main ingredient PE wax are fully utilized, and a layer of waxfilm is formed on the surface of the circuit board and a component to protect the circuit board after melting.

The invention relates to a method for sealing a liquid reservoir for a liquid flow battery, which comprises the following steps of: installing a seal cover on the liquid reservoir, filling the liquid reservoir with electrolyte, and sealing the liquid reservoir; indirectly sealing the sealed liquid reservoir with liquid or gas. The pressure in the liquid reservoir indirectly sealed by the liquid or gas always stays at one standard atmospheric pressure. The liquid or gas used for indirect sealing is sealing liquid or sealing gas. The sealing liquid or sealing gas and the liquid reservoir are connected through a conduit. One end of the conduit is outside the liquid reservoir. The invention has the advantages that the sealing method is simple, convenient and efficient; the problem of inconsistent charging states of battery anode and cathode caused by oxidation of low-valence ions and the problems of ion permeation, water permeation, membrane aging and the like caused by the problem of pressure unbalance are solved; the service life of the membrane can be effectively prolonged; and the coulomb efficiency of the liquid flow battery is improved and the service life of the liquid flow battery can be effectively prolonged.

The invention discloses a control reversing device of gas circuits of an oxygen concentrator. The control reversing device comprises an upper cover plate, a valve body and a lower cover plate, wherein a left cavity and a right cavity are formed inside the valve body, supporting frames, linkage assemblies, upper end cover sealing assemblies and lower end cover sealing assemblies are arranged in the left cavity and the right cavity of the valve body respectively, the upper cover plate and the lower cover plate are installed on the valve body through screws, a valve body gas circuit is arranged inside the valve body, the upper cover plate and the lower cover plate are respectively provided with a cover plate gas circuit, a passage is formed by the cover plate gas circuit on the upper cover plate, the cover plate gas circuit on the lower cover plate and the valve body gas circuit on the valve body, a solenoid valve is further arranged on the valve body, and a plurality of pipe connectors which are communicated with the valve body gas circuit are further arranged on the valve body. According to the control reversing device of the gas circuits of the oxygen concentrator, control over the two gas circuits can be achieved only through connection and disconnection of one solenoid valve, the sealing mode is simple, working is flexible, working efficiency is greatly improved, the production cost is reduced, high economic benefit and high social benefit are achieved, and the good foundation is laid for mass production in the future.

The invention discloses a control reversing device of gas circuits of an oxygen concentrator. The control reversing device comprises an upper cover plate, a valve body and a lower cover plate, wherein a left cavity and a right cavity are formed inside the valve body, supporting frames, linkage assemblies, upper end cover sealing assemblies and lower end cover sealing assemblies are arranged in the left cavity and the right cavity of the valve body respectively, the upper cover plate and the lower cover plate are installed on the valve body through screws, a valve body gas circuit is arranged inside the valve body, the upper cover plate and the lower cover plate are respectively provided with a cover plate gas circuit, a passage is formed by the cover plate gas circuit on the upper cover plate, the cover plate gas circuit on the lower cover plate and the valve body gas circuit on the valve body, a solenoid valve is further arranged on the valve body, and a plurality of pipe connectors which are communicated with the valve body gas circuit are further arranged on the valve body. According to the control reversing device of the gas circuits of the oxygen concentrator, control over the two gas circuits can be achieved only through connection and disconnection of one solenoid valve, the sealing mode is simple, working is flexible, working efficiency is greatly improved, the production cost is reduced, high economic benefit and high social benefit are achieved, and the good foundation is laid for mass production in the future.

The invention relates to a method for applying oxidized PE wax to sealing protection of a circuit board. The method comprises the steps that the surface of the circuit board is coated with a layer ofcoupling agent, and air drying is conducted; the circuit board is dehumidified; a tackifier and a liquid toughening agent are added into the molten oxidized polyethylene wax to be uniformly mixed to prepare molten wax; the dehumidified circuit board is immersed in the molten wax for sealing, and after sealing is completed, the circuit board is placed on release paper and dried. By means of the sealing method, the defects that the oxidized PE wax easily cracks at the low temperature and has poor adhesion force are overcome; the tackifier and the toughening agent is added according to a ratio through repeated experiments, and finally, the oxidized PE wax can meet the requirement of the circuit board for effective waterproof and moisture-proof sealing in the working environment at minus 20-60DEG C. By means of the method, the good acid and alkali resistance, electrolytic-resistance chemical stability and hydrophobicity of the main ingredient PE wax are fully utilized, and a layer of waxfilm is formed on the surface of the circuit board and a component to protect the circuit board after melting.

The invention relates to a high-pressure gas bottle and an inflating method thereof. The high-pressure gas bottle comprises a bottle nozzle which is provided with a gas bottle opening, the gas bottle opening is a ladder outlet with a smaller inner part and a bigger outer part, an inflating plug is arranged at a wide mouth section of the ladder outlet in a revolving mode through screw threads, theinflating plug is provided with a gas outlet channel communicated with the gas bottle opening, a sealing membrane is arranged at the outer port of the gas outlet channel in a sealing mode, and the ladder end face of the opening forms a sealing fit with the inner side end face of the inflating plug. The inflating plug is firstly unscrewed for 1 to 3 circles when inflating, gas is inflated to the gas bottle through thread gaps between the inflating plug and the bottle nozzle, the inflating plug is screwed for sealing when the inflation is over, and then sealing weld is set on the end face of the bottle nozzle so as to realize sealing between the inflating plug and the gas bottle opening. The inflating plug is arranged in the gas bottle opening in a revolving mode, gas is inflated to the gasbottle through the thread gaps between the inflating plug and the bottle nozzle, and the inflation is simple, safe and reliable.

The invention discloses a sealing and cooling structure of an ultra-speed table. The sealing and cooling structure is characterized in that a cover is fixedly connected onto a protective cover, the protective cover is fixedly connected with an upper port of a motor casing, a lower port of the motor casing is fixedly connected with an upper port of an upper wiring cover, a lower port of the upper wiring cover is fixedly connected with an upper port of a lower wiring cover, one end of a pipeline is hermetically connected with a lower port of the lower wiring cover, the other end of the pipelineis hermetically connected with an air outlet of an air blower, and a valve is connected onto the pipeline; spaces between the protective cover and the cover, between the protective cover and the motorcasing, between the motor casing and the upper wiring cover and between the upper wiring cover and the lower wiring cover are sealed by sealing rings. The sealing and cooling structure has the advantages that main units are integrally sealed instead of being originally locally sealed by sawtooth shaft peaks at the upper ends of rotors, accordingly, sealing modes are simple, and good sealing effects can be realized; the sealing and cooling structure can be in intermittent working and intermittent cooling schemes, and accordingly good cooling effects can be realized.

The invention belongs to the technical field of civil air defense engineering, in particular to a modular pipe hole sealing device for civil air defense engineering. Aiming at the problems of cumbersome and time-consuming and labor-intensive sealing methods for perforations in the prior art, the following scheme is proposed, which includes a fixed plate, and One side of the fixed plate is fixedly installed with a rubber column, and the fixed plate and the rubber column are respectively provided with a second jack and a first jack, and the second jack and the first jack are provided with the same pipeline, so One side of the fixed plate is provided with a civil defense wall, and a reserved hole is opened on the civil defense wall, and a galvanized sleeve is fixedly installed in the reserved hole, and the outer side of the rubber column is in contact with the inner wall of the galvanized sleeve. There are two rotating holes on the fixed plate, and the rotating rods are threaded in the two rotating holes. The sealing method of the present invention is simple, saves time and effort, and has a good sealing effect. Stability, simple structure, easy to use.

The present invention is applicable to the technical field of wind tunnel test, and provides a threading hole sealing device and a sealing method for a negative pressure device, including a mounting sleeve and a connecting piece; the mounting sleeve is a hollow circular platform structure, and includes symmetrically arranged first mounting sleeves The main body and the second installation sleeve main body, the first installation sleeve main body and the second installation sleeve main body are hinged; the inside of the installation sleeve is provided with a partition; The left partition and the right partition are composed; and the partition is provided with threading holes; the main bodies of the first installation sleeve and the second installation sleeve are provided with connecting parts. The sealing device of the present invention is a circular platform structure, the diameter of the small end is smaller than the diameter of the reserved threading hole, the small end of the installation sleeve is pushed into the reserved threading hole, and the sealing performance increases with the increase of the negative pressure in the negative pressure device during the test .

The invention relates to a sealing structure and method applied to a high-pressure container. The structure comprises the high-pressure container, an unloading opening is formed in the high-pressure container, a step is arranged at one end of the high-pressure container and used for containing an anti-explosion piece for detecting the sealing effect, mineral powder with certain gradation is arranged on the anti-explosion piece, and a gap is formed between the anti-explosion piece and the inner wall of the high-pressure container; water is injected into the high-pressure container through a water injection mechanism, the mineral powder with certain gradation flows towards the threaded gap between the anti-explosion piece and the inner wall of the high-pressure container under the pushing effect of water, the threaded gap is filled in order, and sealing is achieved. The sealing method of the technical scheme is more efficient than a traditional sealing mode or based on a high-pressure container structure type or by utilizing a special sealing material. According to the sealing structure and method, mineral powder is used for plugging, the method is a reliable supplement of a conventional sealing mode, and the mineral powder is a product generated through rapid unloading of the high-pressure container but not specially customized. Therefore, the sealing method is simple, efficientand reliable.

The invention is applicable to the technical field of wind tunnel tests, and provides a threading hole sealing device and sealing method for a negative pressure device. The threading hole sealing device comprises a mounting sleeve and a connecting piece, wherein the mounting sleeve is of a hollow circular truncated cone structure and comprises a first mounting sleeve main body and a second mounting sleeve main body which are symmetrically arranged, and the first mounting sleeve main body is hinged with the second mounting sleeve main body; the mounting sleeve is internally provided with a partition plate; the partition plate is composed of a left partition plate and a right partition plate which are respectively arranged at the inner side surfaces of the first mounting sleeve main body and the second mounting sleeve main body; the partition plate is provided with a threading hole; and the main bodies of the first mounting sleeve and the second mounting sleeve are provided with connecting parts. The sealing device provided by the invention is of a circular truncated cone structure, the diameter of the small end is less than the diameter of a reserved threading hole, the small end of the mounting sleeve is pushed into the reserved threading hole, and the sealing performance is increased along with the increase of negative pressure in the negative pressure device in the test process.

The invention discloses an efficient heat exchange assembly for refrigeration equipment. The efficient heat exchange assembly comprises a shell and a guiding pipe assembly, wherein the guiding pipe assembly is arranged in the shell; gaps between the shell and the guiding pipe assembly are filled with high-thermal conductivity solid fillers of which the porosity is 40 to 60 percent; the guiding pipe assembly is formed by connecting at least two pure-copper branch guiding pipes in parallel; the at least two pure-copper branch guiding pipes are merged and communicated with each other at the positions of a refrigeration fluid influx opening and a refrigeration fluid outflux opening through a welding way; welding joints are sealed by adopting ZP special sealing grease. According to the efficient heat exchange assembly disclosed by the invention, the heat exchange area under the same mass is enlarged, the heat exchange area is increased by using a simple way, the economical efficiency is good, and the heat exchange efficiency is high; sealing is carried out by adopting the ZP special sealing grease, so that the adaptability is good, the sealing way is simple, the sealing performance is good, and the problem that leakage can be easily caused due to manual packaging is solved; the structure is simple, a malfunction can be easily eliminated, and maintenance and accessory replacing operation can be easily carried out.