104results about How to "Solve the leak" patented technology

The utility model relates to the technical field of pipeline connection anti-leakage, in particular to an anti-leakage device of a heating, ventilation and fire fighting system, which comprises two pipelines, flanges are arranged on the pipelines, the two flanges are connected through a first bolt, a groove is arranged at the end of each pipeline, a first sealing ring is arranged in each groove, and sealing covers are sleeved outside the two flanges. A jacking mechanism is arranged on the sealing cover; the jacking and pressing mechanism is used for jacking and pressing the two flanges and pressing the first sealing ring between the two flanges. Through cooperation of the sealing cover and the jacking mechanism, extra pressure can be applied to the two flanges, the first sealing ring is further pressed, the sealing effect is enhanced, and the anti-leakage performance of the connecting position is remarkably improved; the structure is simple, installation can be achieved without complex operation, the problem of leakage caused by aging of a sealing piece and loosening of a connecting piece in traditional pipeline connection is solved, resource waste can be reduced, the equipment damage probability can be lowered, and stable operation of a heating, ventilation and fire fighting system is guaranteed.

The utility model relates to the technical field of sealing rings, in particular to a multi-cavity anti-seepage rubber sealing ring which comprises a main sealing ring, a main body of the main sealing ring is a soft rubber body, a supporting body with an S-shaped inner sleeve cross section is arranged in the supporting body, an elastic body is filled in the supporting body, a plurality of sealing convex rings are arranged on the two sides of the top and the bottom of the main sealing ring, and a plurality of sealing lips are arranged on the soft rubber body. The elastic body is composed of a rubber ring and a plurality of supporting convex ribs. When the sealing ring is extruded, a multi-cavity structure is formed between the sealing lips and cooperates with the sealing convex ring, a tight multiple anti-seepage system is constructed, the anti-seepage performance is remarkably improved, meanwhile, the elastic body continuously provides stable supporting force for the sealing ring by means of the good elastic supporting performance, it is ensured that the main sealing ring is tightly attached to the sealing face, and leakage caused by untight attachment is effectively avoided.

The utility model discloses a kind of hysteroscope liquid leakage prevention structures, including center cylinder base, the both ends of center cylinder base are fixedly connected with end fixed ring, the outer end array of two sides the end fixed ring is fixedly connected with multiple elastic supporting pieces, and the outer end of multiple elastic supporting pieces of same side is equipped with silica gel outer cover, two sides The outer side of elastic supporting piece is fixedly connected with operating slip ring and insertion stop seat respectively, and the outer end of two sides silica gel outer cover is fixedly connected with the outer edge of corresponding side operating slip ring and insertion stop seat.In insertion, small in diameter, it is convenient to set, and will not cause damage to cervix, can effectively solve the problem of clinical surgeon encountered in hysteroscopy surgery in uterine cavity liquid leakage, reduce operation time and surgical complications, improve operation efficiency and safety.

The utility model relates to the technical field of semiconductor production equipment, in particular to a material pouring box device capable of automatically counting products, which comprises a base, an empty material box and a full material box which are communicated with each other are arranged at the top of the base, and the empty material box and the full material box are adjacently connected side by side and are communicated through a flow guide channel; the material pushing mechanism comprises a material pushing air cylinder fixed to the base and a material pushing plate connected to the tail end of a piston rod of the material pushing air cylinder, and the section shape of the material pushing plate is matched with the cross section of the cavity of the full material box; the detection control module is vertically fixed to the side, away from the full material box, of the empty material box and extends towards the inlet direction of the flow guide channel. Through PLC control, sensor detection and material pushing mechanism linkage, automatic material pouring and accurate counting are achieved, buffer protection and traceable data export functions are matched, the problems of material leakage, counting errors and low efficiency of manual material pouring are solved, and the automation degree, the product protection performance and the quality traceability of the semiconductor production process are improved.

The application relates to an air treatment device and a humidifying device. The air treatment device comprises a shell, a wet curtain assembly with a first water channel, a water pumping assembly, the water pumping assembly being detachably mounted on the shell, the water pumping assembly having a second water channel, the second water channel being integrated on a first connector, a second connector arranged on the shell and having at least one connecting channel for connecting the first connector and the first water channel, a valve rod arranged in the at least one connecting channel, a reset member connected to the valve rod, the valve rod being pressed to move to a first position when the water pumping assembly is mounted on the shell, and the valve rod moving to a second position under the action of the reset member when the water pumping assembly is detached from the shell, and first and second power connection terminals arranged on the two sides of the first connector respectively. The technical scheme of the application can solve the problems of water leakage and complex structure of the second connector, and improve the electrical safety and stability.

The application relates to the technical field of coating devices, and discloses a fireproof layer coating machine for fireproof glass production and a production process, wherein the fireproof layer coating machine for fireproof glass production comprises an equipment frame, a conveying assembly fixedly installed in the equipment frame, a bottom frame mechanism arranged above the conveying assembly and a coating mechanism, and the inside of the bottom frame mechanism supports a glass sample; a three-stage nested floating structure formed by first, second and third sliding sleeves provides a multi-degree-of-freedom alignment capability for a coating roller; when special-shaped glass passes, the coating roller can passively and adaptively float along the curved surface profile of the special-shaped glass, and always adhere to the surface of the glass; meanwhile, the whole coating head is flexibly hung by a plurality of supporting springs, overall buffering is provided, the problems of accumulation at protruding positions and coating leakage at recessed positions are solved, uniform transfer of fireproof coating on a special-shaped surface is ensured, and finally, a high-quality coating with consistent thickness and continuous integrity is obtained.

The utility model relates to a concave-convex splicing assembly type wall body, the wall body comprises daughter boards (1) and corner splicing pieces (2), the two opposite sides of each daughter board (1) are respectively provided with a splicing clamping opening (1-1) and a splicing clamping groove (1-2) which are used for splicing, and the adjacent daughter boards (1) can be spliced in a plane mode through the splicing clamping openings (1-1) and the splicing clamping grooves (1-2); the corner splicing pieces (2) comprise right-angle bending splicing pieces (2-1), acute-angle bending splicing pieces (2-2) and obtuse-angle bending splicing pieces (2-3) which are used for right-angle corner splicing, acute-angle corner splicing and obtuse-angle corner splicing of the adjacent daughter boards (1); the daughter board (1) is provided with preformed holes (1-3) used for being matched with self-tapping screws to achieve fixation. Compared with the prior art, the sound insulation wall has the advantages that the problem of sound leakage generally existing at the splicing position of a traditional assembly type wall can be effectively solved, the sound insulation amount of the splicing position is equivalent to that of the wall, adjustment can be carried out according to the design requirements of close splicing or masking seams, and the sound insulation wall has the attractive effect and flexible design.

The utility model relates to a fire hose wear resistance test device which comprises a test bed, a rotary water supply mechanism and a friction mechanism, the rotary water supply mechanism comprises a first rotary water supply assembly and a second rotary water supply assembly which are arranged on the two sides of the friction mechanism respectively, and the two ends of a fire hose are sealed and fixed through a rubber sleeve and a hoop; the second assembly slides through the sliding rail to adapt to water pressure extension of the water hose to ensure that the water hose is straight. The friction mechanism applies pressure through a weight load assembly, a cam connecting rod mechanism drives a movable bearing plate to reciprocate, and a dual-motor rotating wheel and a spring tensioning assembly are matched, so that a friction belt makes contact with a water hose through a new abrasive belt every time the friction belt reciprocates. The device solves the problems of high-pressure sealing, precise pressure control and friction belt displacement, has the advantages of being convenient to install, stable in test and high in automation degree, and is suitable for the standard test of the wear resistance of the fire hose.

The utility model discloses a modular prefabricated spliced waterproof cable trench, including a plurality of first and last socket connections prefabricated block, the section of every prefabricated block is the top open structure of U character, and the one end of this prefabricated block is made to have the socket, and the other end is made to have the socket, and two vertical inner walls of prefabricated block are fixed with the ditch wall embedded part of pouring, the socket groove of prefabricated block is laid with multilayer waterproof belt, and the multilayer waterproof belt is fixed tightly by the socket end of the upper level prefabricated block and the socket end of the lower level prefabricated block, and the multilayer waterproof belt is flush with the inner wall of waterproof cable trench. The waterproof cable trench is innovative through the splicing node structure between many prefabricated blocks, and sets up waterproof measure at the splicing, simple and quick, strengthens the sealing of the connecting surface when shortening the prefabricated cable trench connecting time, improves the construction efficiency, thereby improves the structural waterproof, anticorrosive performance of whole cable trench.

This invention provides a method for embedding wires in continuous fiber-reinforced composite materials and vertically leading them out, comprising the following steps: laying a first insulating protective layer on a first composite material matrix; arranging multiple wires at predetermined intervals and in parallel on the first insulating protective layer; laying a second insulating protective layer above the wires; encapsulating to form a composite material preform; laying a second composite material matrix on the second insulating protective layer; forming a prefabricated cavity in the second composite material matrix through layer-by-layer stacking; filling the prefabricated cavity with a placeholder structure; encapsulating to form a complete preform; and curing the complete preform. After curing, the placeholder structure is removed from the second composite material matrix, and the wires can be vertically led out and moved from the prefabricated cavity. This invention can reduce the negative impact of embedded wires on the mechanical properties of composite materials and effectively prevent leakage problems caused by damage to the insulating varnish layer on the wire surface.

This invention relates to the field of valve technology, specifically a low-temperature venting and antifreeze valve. The invention utilizes a valve body venting component to vent liquid media from the valve body when a preset temperature is reached. A controller coordinates the operation of each component, driving the electrically controlled valve to open, simultaneously closing the electrically controlled check valve, and activating a hot air dryer to generate hot air. The hot air is blown into the inner cavity of the T-shaped pipe through the gap between the guide arc block and the T-shaped pipe, and then, through the connecting groove and sealing limiting groove, into the valve body cavity for hot air drying. Simultaneously, a heating coil is activated to heat and dry the bottom of the valve body cavity. Under the continuous blowing of hot air, water vapor in the valve body cavity is driven into the pipe. The water vapor condenses into water on the inner wall of the pipe and then collects in the low-lying areas of the pipe. Because the inner cavity of the valve body is dried, water stains do not freeze and affect the sealing structure. The medium extraction component enables the evacuation of the liquid media from the inner cavity of the pipe.

This utility model provides a hydraulically sliding watertight door for ships, including a door frame, a door body hinged to one end of the door frame, and a sealing ring adhered to the edge of the door body near one end of the door frame. A groove is horizontally formed at the center of the door body near one end of the door frame, and a hydraulic drive component is hinged to the side of the groove away from the hinge axis between the door body and the door frame. Compared with the prior art, this utility model has the following advantages: Through precise matching between the sealing ring and the sealing groove of the door frame, and utilizing the beveled surface of the locking block near the locking groove, lateral pressure is generated during the locking process, tightly pressing the sealing outer edge of the door body against the door frame. Compared with the traditional simple rubber strip sealing structure, it can effectively resist seawater pressure, avoid leakage problems caused by ship vibration and component aging, and greatly improve watertight performance.

The utility model discloses a quick-assembly water receiving box and a draining plate, the quick-assembly water receiving box comprises a box body and a water receiving groove capable of receiving water, and the water receiving groove is arranged in the middle of the box body; the two limiting grooves are formed in the opposite side walls of the box body, and the limiting grooves transversely extend so that the box body can be inserted into the limiting grooves in a horizontal sliding mode. The water receiving groove can effectively receive liquid, it is ensured that the liquid is stored in a centralized mode and does not overflow, the limiting grooves transversely extending in the two sides provide a foundation for horizontal sliding insertion, the water receiving box can be rapidly and accurately installed with an external structure such as a draining plate in a butt joint mode, installation difficulty caused by angle deviation in a traditional clamping mode is avoided, and the service life of the water receiving box is prolonged. In addition, due to the horizontal sliding characteristic of the limiting groove, the box body is extremely easy and convenient to disassemble, a user can easily take out the box body to be cleaned or maintained only by exerting force in the horizontal direction, use convenience is improved, the liquid containing function is guaranteed, and meanwhile the liquid containing effect is improved. And the operation experience of installation and maintenance is obviously optimized.

The application provides a vehicle lamp connecting structure and a vehicle with the same, and belongs to the technical field of vehicle structure. The vehicle lamp connecting structure comprises: a vehicle lamp fixed to a vehicle body; and a bumper directly or indirectly matched with the vehicle lamp through an anti-creep support fixed to the vehicle body to form a first preset gap, wherein the first preset gap is determined according to a driving creep displacement of the bumper and an assembly tolerance between the vehicle lamp and the bumper, so as to ensure the gap and surface difference requirements between the vehicle lamp and the bumper and avoid damage of the vehicle lamp caused by the creep of the bumper. The application also provides a vehicle comprising the above vehicle lamp connecting structure. The vehicle lamp connecting structure and the vehicle can ensure the appearance aesthetics and avoid the problem of damage of the vehicle lamp caused by the creep of the bumper.

The invention provides an interlayer rear windshield and a vehicle. The interlayer rear windshield comprises a glass body, a low-radiation layer, a heating function layer, a first conductive element and a second conductive element. The glass body comprises an outer glass plate, a bonding layer and an inner glass plate which are stacked. The outer glass plate comprises a first surface and a second surface which are oppositely arranged, the inner glass plate comprises a third surface and a fourth surface which are oppositely arranged, and the bonding layer is located between the second surface and the third surface. The low-radiation layer is arranged on the fourth surface. The heating function layer is arranged in the glass body and located between the second surface and the third surface, and the heating function layer is used for generating heat when powered on. The first conductive element and the second conductive element are arranged between the second surface and the third surface, one of the first conductive element and the second conductive element is used for being electrically connected with a positive electrode of an external power supply, the other one is used for being electrically connected with a negative electrode of the external power supply, and the first conductive element and the second conductive element are electrically connected with the heating function layer.

The utility model belongs to the premixed mortar stirring design technical field, concretely relates to a kind of air leakage prevention pressure tee bend valve device applied to premixed mortar powder material shunting, including valve body, first valve plate, second valve plate, valve plate drive mechanism, sealing limiting mechanism, the first valve plate, second valve plate are set in valve body and are fixedly connected with valve plate shaft, the first valve plate and second valve plate rotate synchronously with the rotation of valve plate shaft, the valve plate drive mechanism is connected with valve plate shaft and drives valve plate shaft rotation, the limiting frame is set on the inner wall of valve body, the limiting frame is set between feed inlet and discharge port and is abutted with first valve plate and second valve plate, for limiting the rotation angle of first valve plate or second valve plate, sealing strip is set on limiting frame.The air leakage prevention pressure tee bend valve device applied to premixed mortar powder material shunting of the utility model effectively avoids the leakage problem caused by the closure of valve body is not strict, especially suitable for the tee bend material of powder conveying in the process under the condition of gas pressure.

The utility model relates to a kind of vehicle waterproof door hole sealing strip and vehicle, including sealing strip body, butyl rubber layer and double bubble tube sealing support structure, the butyl rubber layer is set to the sealing strip body for with the card joint part of vehicle body sheet metal stop opening installation, the double bubble tube sealing support structure is set to the sealing strip body for with the sealing lip edge part of door cooperation.The utility model has the beneficial effect that it realizes double dynamic sealing, improves waterproof reliability and enhances impact resistance and deformation resistance.

This invention discloses a heating-not-burning cigarette cooling unit containing a phase change cooling material and a heating-not-burning cigarette. The unit comprises at least a carrier paper and a phase change cooling material coated on the carrier paper. The phase change cooling material is distributed in a non-fully-covering, regular pattern on the carrier paper. The carrier paper coated with the phase change cooling material forms multiple longitudinally extending channels through winding, folding, gathering, bending, and wrinkling, and has a porosity of 40%-90% along the longitudinal direction. The phase change cooling material comprises 55-96 parts by weight of polyethylene glycol, 1-5 parts by weight of in-situ reinforcing material, and 3-40 parts by weight of thermally conductive filler. The heating-not-burning cigarette cooling unit of this invention has the advantages of high latent heat of phase change, low thermal hysteresis effect, high heat absorption efficiency, apparent stability without collapse, and no leakage.

The application discloses a kind of discrete series low distributed capacitance liquid cooling heat dissipation device and method, it belongs to electronic device heat dissipation technical field, heat dissipation device includes several heat dissipation units, the top of each heat dissipation unit is used to set power device, and two adjacent heat dissipation units are connected by cooling liquid pipeline;Each heat dissipation unit includes matrix and radiator, cooling liquid pipeline is through the inside of matrix, the top center of matrix is equipped with mounting hole, and mounting hole is equipped with radiator, and the lower half of radiator is inserted into the inside flow channel of cooling liquid pipeline, and the top of radiator is used to place power device.The application adopts discrete series heat dissipation unit structure, cooling liquid pipeline is through each unit matrix, and the lower half of radiator is inserted into the inside flow channel of pipeline, and each unit independently corresponds a power device.Solve the parasitic distributed capacitance problem caused by shared metal radiator, eliminate resonance loop, inhibit switching oscillation, reduce loss, ensure that heat dissipation is uniform and dynamic equalization, improve the stability and service life of high-voltage series module.

This invention provides an elastic waterproof putty powder coating structure, belonging to the field of waterproof coating technology. It includes a substrate treatment layer, on the outer surface of which are sequentially arranged an alkali-resistant layer, an elastic waterproof main layer, a crack-resistant reinforcing layer, an elastic decorative surface layer, and a surface protective cover layer. This invention, through the design of the elastic waterproof main layer, uses it as its core, achieving long-lasting waterproofing through multi-layer sealing and high elasticity. Simultaneously, it can cope with substrate deformation, reducing leakage at its source. On one hand, the nano-silane in the elastic waterproof bottom layer imparts hydrophobic properties, allowing for the drainage of small amounts of infiltrated water. On the other hand, the elastic waterproof main layer can deform synchronously with the micro-cracks caused by thermal expansion and contraction and slight settlement of the substrate, always maintaining the integrity of the waterproof membrane and avoiding leakage problems caused by substrate deformation and cracking in conventional waterproof coatings.

This invention provides a method and apparatus for monitoring water leakage in a waste heat boiler used in copper smelting, comprising: acquiring the average value of water supply over multiple time periods; acquiring the average value of evaporation over multiple time periods; determining a monitoring value based on the average value of water supply, the average value of evaporation, the average value of wastewater discharge, and the average value of sampling; determining whether the boiler is leaking based on the monitoring value and an alarm threshold; and if so, issuing a water balance alarm signal; thereby enabling the timely detection of leaks in the waste heat boiler, improving the intrinsic safety level of the equipment, and reducing the maintenance difficulty for maintenance personnel.

The utility model discloses a comprehensive filter element with a water-saving function. The comprehensive filter element comprises a filter piece, a filter element body and a water passing sleeve piece, the filtering piece is arranged on the filter element body, the filter element body is provided with a water passing cavity, the water passing cavity is provided with an open end and a closed end, the water passing sleeve piece is detachably arranged at the open end of the water passing cavity, and a plurality of water passing holes communicated with the water passing cavity are formed in the water passing sleeve piece; the shower head handle is provided with a water inlet connector and a water passing channel communicated with the water inlet connector, the filter element is inserted into the water passing channel from the water inlet connector, a water passing sleeve piece of the filter element is connected to the water inlet connector in a clamped mode, and a plurality of flow passing holes communicated with the water passing cavity and the water passing channel are formed in a filter element body. The connector of the water inlet hose abuts against the water passing suite and is in sealing connection with the water inlet connector in a detachable mode, and water enters the water inlet hose through the water inlet connector and provides filtered water for the shower head handle through the filter element and the water passing channel. The utility model can play a water-saving role, improve the filtering effect, simplify the assembly and disassembly process and reduce the processing cost.

This invention discloses a heated tobacco cooling unit with enhanced thermal conductivity and a heated tobacco product, comprising a carrier sheet, several metal foils, and several phase change cooling materials. The carrier sheet has several perforated holes. Several metal foils are disposed on at least one side of the carrier sheet and cover the perforated holes. The metal foils are spaced apart and discretely arranged. The phase change cooling materials are filled within the perforated holes using the metal foils as a carrier. The carrier sheet containing the metal foils and phase change cooling materials is formed into the heated tobacco cooling unit by at least one of the following methods: winding, folding, gathering, bending, and pleating. The metal foils are regularly and intermittently distributed along the longitudinal direction of the tobacco strip. The cooling unit has multiple longitudinally extending channels, and the porosity of the cross-section is 40%-90%. The heated tobacco cooling unit with enhanced thermal conductivity of this invention has the advantages of high latent heat of phase change, low thermal hysteresis effect, high heat absorption efficiency, apparent stability without collapse, and no leakage.

The utility model relates to the technical field of closestools, in particular to an intelligent closestool with a water-saving, pressure-reducing and noise-reducing valve, the rear end of an intelligent closestool body is provided with an empty slot and a water inlet pipe located in the empty slot, the pressure-reducing and noise-reducing valve fixed in the empty slot is arranged on the water inlet pipe, a time period control module is arranged in the pressure-reducing and noise-reducing valve, and the time period control module is connected with the water-saving, pressure-reducing and noise-reducing valve. The time period control module arranged in the pressure reduction and noise reduction valve can automatically distinguish day and night time periods and automatically switch to a low-pressure mode at night, so that water flow impact force during flushing is reduced, flushing noise is effectively reduced, the influence on rest of family members is avoided, and particularly the sleep environment of old people and infants is protected.

The utility model relates to building decoration technical field especially, it is a kind of building curtain wall waterproof structure, its technical scheme includes: frame, first flow guide groove and second flow guide groove are fixedly installed from top to bottom in the frame inside, first reserved hole is equidistantly opened in the frame top, second reserved hole is opened in the frame bottom, the top of first flow guide groove adopts open structure design, both sides of the bottom of first flow guide groove are equipped with opening, the top length of first flow guide groove matches with the top length of frame inside, the bottom of second flow guide groove adopts open structure design, both sides of the top of second flow guide groove are equipped with opening, the bottom length of second flow guide groove matches with the bottom length of frame inside, second flow guide groove upper end face is sleeved in the outside of first flow guide groove lower end face.The utility model has the advantages of having waterproof function and still keeping the advantages of ventilation and ventilation in rainy day.

This utility model relates to a waterproof structural device for the connection between old and new concrete foundation slabs in buildings, belonging to the field of building waterproofing engineering technology. It includes a main waterproofing body, which is inverted Z-shaped and positioned at the connection between the old and new concrete foundation slabs. A honeycomb buffer layer is filled between the main waterproofing body and both the old and new concrete foundation slabs. Several interlocking grooves are formed on the contact surfaces of the old and new concrete foundation slabs with the honeycomb buffer layer. The filling material within the main waterproofing body and the honeycomb skeleton can absorb water and expand significantly to form a gel barrier layer, creating multiple layers of defense. This allows it to adapt to complex working conditions, significantly extending the waterproofing lifespan. Furthermore, the main waterproofing body combines elasticity and strength, allowing it to deform to some extent with the settlement of the old and new foundation slabs. Combined with the good toughness of the honeycomb buffer layer, it is less prone to localized tearing during deformation, reducing stress concentration and sealing failure, and ensuring the overall structural integrity.

The utility model relates to the technical field of dam body reinforcement, and discloses an assembly type concrete dam body reinforcement connecting piece which comprises a dam body, a connecting piece device and an anti-erosion device, the connecting piece device comprises a connecting piece body and a plurality of conical head columns, a first hole is formed in the position, close to the rear end, of the upper end face of the connecting piece body, and a second hole is formed in the upper end face of the connecting piece body. A plurality of second inclined holes are formed in the positions, close to the rear ends, of the two sides of the outer wall of the connecting piece body, positioning blocks are fixedly arranged at the two corners, close to the lower end faces, of the two sides of the outer wall of the connecting piece body, and fixing blocks are slidably arranged in the first holes; third water stop pads are fixedly arranged on the inner top face and the inner walls of the front side and the rear side of the anti-erosion frame, and a second hole is formed in the middle of the upper end face of the anti-erosion frame. According to the device disclosed by the utility model, the problems of erosion and leakage can be effectively alleviated, and seriously damaged parts can be replaced.

The utility model discloses a kind of split type solar water heater water tank and collector connecting structure, including connector pipe, and pipeline connected with connector pipe;Connector pipe includes pipe body, the connecting pipe of being sleeved on the outer wall of left end of pipe body, there is gap between connecting pipe and pipe body, constitute connecting slot, the right end of connecting pipe is sealedly connected with pipe body, outer wall is provided with external thread;The bottom of connecting slot is provided with first sealing ring, the outer wall of left end of pipe body is provided with annular groove, second sealing ring is embedded in annular groove;When pipeline is connected with connector pipe, its right end is inserted into connecting slot;Annular connecting groove is provided on the outer wall of left end of pipeline, two half rings are embedded in annular connecting groove, connecting sleeve is sleeved at the right end of pipeline, and half ring is located in connecting sleeve;Connecting sleeve includes sleeve portion, and annular portion located at the left end of sleeve portion.The utility model has the advantages that: the long-term stability and service life of sealing structure are effectively enhanced.

The utility model relates to the technical field of building and new energy, and provides a coupling type roof module integrated with photovoltaic installation and drainage functions, which comprises a frame, an installation frame group and a drainage groove, the mounting rack group comprises a first mounting rack and a second mounting rack, the first mounting rack and the second mounting rack are arranged on the frame, and the first mounting rack is lower than the second mounting rack; the drainage groove is formed in the first mounting frame and / or the second mounting frame, the drainage groove is provided with a water inlet, and at least one part of the water inlet is located below the first mounting frame. The roof module integrates photovoltaic installation and drainage functions, and the waterproof performance, the structural strength and the energy utilization efficiency of the roof are improved.

The invention discloses a GaN-based HEMT device and a preparation method thereof. The preparation method comprises the following steps: providing a growth substrate; preparing a two-dimensional insulating material layer on the growth substrate; preparing a GaN-based epitaxial structure on the two-dimensional insulating material layer based on Van der Waals epitaxial growth, wherein the GaN-based epitaxial structure comprises a channel layer and a barrier layer which are sequentially stacked on the two-dimensional insulating material layer; providing a heat dissipation substrate, and bonding the heat dissipation substrate on the surface of one side, far away from the growth substrate, of the GaN-based epitaxial structure; and stripping the growth substrate. According to the method, the two-dimensional insulating material layer is firstly prepared on the growth substrate, and then the epitaxial structure is prepared on the two-dimensional insulating material layer, so that the problem of surface state induced electric leakage of the growth substrate is conveniently solved, and complete stripping and cyclic utilization of the expensive growth substrate are realized by utilizing the characteristic that the two-dimensional insulating material layer is easy to strip; and the performance of the GaN-based HEMT device is further improved while the manufacturing cost is greatly reduced.