218 results about "Metal bellows" patented technology

The invention provides an automatic leak detection method and system for a dynamic bending durability test of a metal corrugated pipe, and relates to the technical field of metal corrugated pipe performance tests.The method comprises the steps that a to-be-tested metal corrugated pipe is installed on a test station, and test working condition parameters are set through a PLC; the test working condition parameters comprise a bending motion mode, a load spectrum, an internal pressure type, a pressure value, a temperature condition and a test frequency; according to the bending motion mode and the load spectrum, a multi-degree-of-freedom bending motion mechanism is driven to apply a dynamic bending load to the metal corrugated pipe; and when the dynamic bending load is applied, internal pressure is applied to the interior of the metal corrugated pipe according to the internal pressure type and the pressure value, and a temperature environment is synchronously applied, so that a multi-factor coupling load is formed. According to the invention, on the basis of working condition setting, through multi-source data acquisition, correction and fusion determination, an automatic closed loop of test execution, abnormity alarm, helium detection quantification and report generation is realized.

The invention provides a metal corrugated pipe concave type forming device and method, and relates to the technical field of metal pipe non-cutting machining, and the metal corrugated pipe concave type forming method comprises the steps that a servo driving mechanism drives a first core mold to expand to the designed diameter in the radial direction, and the first core mold is pushed to move in the axial direction to be folded with a second core mold; the upper die and the lower die are driven by the first hydraulic cylinder to get close to each other for die assembly; a liquid medium is injected into the sealing cavity through the hydraulic assembly; the first hydraulic cylinder drives the upper die and the lower die to move away from each other; a servo driving mechanism drives a first core mold to radially contract and axially move, and a second hydraulic cylinder synchronously drives a second core mold to push formed corrugations; the servo driving mechanism drives the first core mold to axially move in the direction close to the second core mold for resetting, and the second hydraulic cylinder drives the second core mold to reset. The first core mold and the second core mold are adopted to move cooperatively for feeding, full-automatic continuous machining of the metal corrugated pipe is achieved, and the forming efficiency is remarkably improved.

The invention relates to the technical field of thermal control of spaceflight electronic equipment, and discloses a heat dissipation device based on a corrugated pipe liquid metal unit array and a manufacturing process, and the heat dissipation device comprises a plurality of metal corrugated pipe units, a radiator substrate located at the tops of the metal corrugated pipe units, and a unit bottom plate located at the bottoms of the metal corrugated pipe units; the number and the positions of the metal corrugated pipe units are matched with those of components on the component substrate, and each metal corrugated pipe unit comprises one or more metal corrugated pipes; one side of the metal corrugated pipe is in sealed connection with the radiator substrate, and the other side of the metal corrugated pipe is in sealed connection with the unit bottom plate; the metal corrugated pipe is filled with liquid metal and used for transferring heat. According to the invention, through independent elastic deformation of the metal corrugated pipe units, the height difference of electronic components below is compensated in a self-adaptive manner, pressure control and efficient heat conduction are realized, and the problems existing in the heat dissipation design of the spacecraft electronics box are solved.

The invention discloses a detection device for a metal corrugated pipe, and relates to the technical field of corrugated pipe detection, the device comprises a base, the left side and the right side of the upper end of the base are respectively and symmetrically fixed with a fixed plate I and a fixed plate II, and the upper ends of the fixed plate I and the fixed plate II are provided with surface detection structures for detecting the outer surface of a pipe fitting. According to the internal supporting structure, through a linkage mechanism of the internal supporting lead screw and the gear, stable fixation of the interior of the pipe fitting and synchronous rotation during detection are achieved; meanwhile, the surface detection structure utilizes a reciprocating screw rod to drive a detection piece to do linear reciprocating motion, and the outer surface of the pipe fitting is comprehensively scanned; therefore, the stability of the pipe fitting in the detection process is ensured, errors caused by shaking or displacement are avoided, and the detection precision is remarkably improved; omnibearing detection capability ensures that tiny defects on the surface of the pipe fitting are accurately found, and detection quality and reliability are further improved.

The application belongs to the technical field of water quality filtering of heat exchange equipment, and particularly relates to a filtering device and method for water quality of wave disturbance flow cooling heat exchange equipment, which comprises a primary filtering tank with supporting feet, a primary filtering mechanism is arranged in the primary filtering tank, a backwashing filter is arranged below the primary filtering tank, an aggregation mechanism is arranged between the primary filtering tank and the backwashing filter, and a sterilization mechanism is arranged at the output end of the backwashing filter. The filtering device and method for water quality of wave disturbance flow cooling heat exchange equipment, through the booster pump for pressurizing the spray water entering the metal bellows, the instantaneous high-pressure water flow impacting the metal bellows can generate a longitudinal wave and compression, and then the micro-particles can be compressed into groups, and the two groups of reset ropes relatively reset the metal bellows, so that the spray water and the particles in the water are pushed forward to flow into the backwashing filter, so that the water flow passes through the filtering medium to filter out the solid particles and suspended matters in the water, thereby reducing the operation cost.

The utility model relates to the technical field of flat pipe machine, concretely to a flat pipe machine for metal bellows production and processing, the utility model discloses a workbench, the inner wall one side of workbench is provided with cleaning assembly, the other end of workbench is provided with cutting assembly, the inner wall rotationally connected of workbench has extruding roller, the front of workbench is provided with gear, gear and extruding roller are fixed, the front fixed connection of gear has pulley, the gear is engaged each other up and down, by setting cleaning assembly, when cleaning to metal bellows, metal bellows is placed to extruding roller between by the worker passing through the circular ring on installation rod, then by the first motor drive extruding roller makes metal bellows move forward, the brush on the installation ring contacts metal bellows to clean the small stone on its surface, and then as far as possible reach the effect that avoid the influence of small stone leading to the surface damage of metal bellows and the service life of extruding roller.

The utility model belongs to the technical field of metal corrugated oil conservators for transformers, and particularly relates to an internal oil type metal corrugated oil conservator with a pointer type oil level indicator, which comprises a conservator cover, a conservator seat, an expansion core, the pointer type oil level indicator and a transmission and detection component. The expansion core body expands and contracts up and down in the cabinet cover, the pointer type oil level gauge is installed on the cabinet cover, the up-and-down movement of the expansion core body is converted into rotation of an oil level gauge pointer through the transmission and detection assembly, oil level information is transmitted to a remote control terminal, and the functions of remotely monitoring the oil level height and giving an alarm when the oil level is too high or too low are achieved. The oil level indicating device is visual and accurate in oil level indication, convenient and fast in reading, smooth and reliable in transmission and detection assembly operation, free of clamping stagnation, high in universality, free of limitation of sealing performance, capable of achieving remote monitoring and capable of saving manpower and material resources.

The invention discloses a detection device for a metal corrugated pipe, and relates to the technical field of corrugated pipe detection, the device comprises a base, the left side and the right side of the upper end of the base are respectively and symmetrically fixed with a fixed plate I and a fixed plate II, and the upper ends of the fixed plate I and the fixed plate II are provided with surface detection structures for detecting the outer surface of a pipe fitting. According to the internal supporting structure, through a linkage mechanism of the internal supporting lead screw and the gear, stable fixation of the interior of the pipe fitting and synchronous rotation during detection are achieved; meanwhile, the surface detection structure utilizes a reciprocating screw rod to drive a detection piece to do linear reciprocating motion, and the outer surface of the pipe fitting is comprehensively scanned; therefore, the stability of the pipe fitting in the detection process is ensured, errors caused by shaking or displacement are avoided, and the detection precision is remarkably improved; omnibearing detection capability ensures that tiny defects on the surface of the pipe fitting are accurately found, and detection quality and reliability are further improved.

The utility model relates to the technical field of urea solution denitration, in particular to an incineration tail gas denitration auxiliary device. The incineration tail gas denitration auxiliary device comprises a liquid storage cylinder, a plurality of metal corrugated pipes which are annularly distributed are installed on the liquid storage cylinder, and a plurality of atomization nozzles are installed on the metal corrugated pipes. The bottom of the liquid storage cylinder is provided with an adjusting component used for adjusting the spraying angle of the atomizing nozzle. According to the incineration tail gas denitration auxiliary device provided by the utility model, the design of the annularly distributed metal corrugated pipes and the multi-angle atomizing nozzles is adopted, and the diversion branch pipes are matched, so that the vertical and horizontal two-way coverage of urea solution in the flue is realized, the mixing efficiency of the urea solution and flue gas is obviously improved, the denitration blind area is reduced, and the denitration efficiency is improved. And the angle of the atomizing nozzle on the metal corrugated pipe is adjusted through the adjusting component, so that the spraying range is expanded, and the denitration requirements under different working conditions are met.

The utility model discloses a fluid seal sealer, which belongs to the technical field of sealers and comprises a sealing connecting pipe, two connecting ring blocks are fixedly arranged in the sealing connecting pipe, the section of each connecting ring block is L-shaped, and a sealing washer is fixedly arranged on one side of each connecting ring block. The connecting ring block, the sealing washer, the threaded ring block and the metal corrugated pipe are arranged in the sealing connecting pipe, efficient and reliable sealing connection is achieved, the L-shaped section design of the connecting ring block is combined with the sealing washer, the sealing performance of the threaded connection position of the threaded ring block is guaranteed, fluid leakage is effectively prevented, and the sealing effect is good. Meanwhile, mounting and dismounting are more convenient and faster through the threaded connection mode, the maintenance efficiency is improved, the sealer is good in elasticity and flexibility due to the arrangement of the metal corrugated pipe, the sealer can adapt to pipeline deformation and vibration under different fluid working conditions, and then damage and leakage caused by working condition changes are effectively prevented.

The present application relates to the technical field of seam welder, and discloses a multi-layer metal bellows matched end seam welding tool.The present application comprises: a machine body internally provided with a driving device and a transformer, an upper welding wheel mechanism and a lower welding wheel mechanism are arranged on the machine body support table, an upper extension guide column capable of axial extension is arranged on the upper welding wheel mechanism, and an upper additional electrode wheel is arranged at one end of the upper extension guide column; a lower extension guide column capable of axial extension is arranged on the lower welding wheel mechanism, and a lower additional electrode wheel is arranged at one end of the lower extension guide column; the tool further comprises a synchronous driving mechanism for driving the upper extension guide column and the lower extension guide column to synchronously extend and retract.The synchronous design of the upper additional electrode wheel and the lower additional electrode wheel is matched with the synchronous driving mechanism to realize the synchronous extension and positioning of the two end electrode wheels, and the seam welding work of the two ends of the metal bellows can be completed at one time, thereby improving the processing efficiency.

The application discloses a kind of weld pipe weld seam strength detection devices for metal bellows, it is related to metal bellows detection technical field.This kind of weld pipe weld seam strength detection devices for metal bellows, including the electric box and switch control box being set on rack.This kind of weld pipe weld seam strength detection devices and method for metal bellows, by simulating the principle of pipe hydraulic forming, liquid medium forming is changed to soft solid rubber forming, by exerting axial tension to cause rubber deformation bulging, and then causing welded pipe to occur deformation, by calculating the proportion of deformation bulging to evaluate weld quality, when continuous welded pipe, it needs to be sampled after welding specified length Test, the device only needs to be debugged when expanding pipe for the first time, testing in subsequent continuous production, can be directly used, more convenient and fast than detection of i-shaped piece, in addition, by reducing mold size, detection range is larger, the device is more convenient than special tension testing machine.

The application provides a wave sheet blanking device for welding metal corrugated pipes, which comprises a supporting table, the upper surface of the supporting table is connected with a cutting machine, one side of the cutting machine is provided with an feeding mechanism, and the other side of the cutting machine is provided with an discharging mechanism; the feeding mechanism and the discharging mechanism are the same in structure, the feeding mechanism comprises a corrugated pipe chute which is slidably connected to the top end of the supporting table, a driving pushing assembly which is arranged outside the end of the corrugated pipe chute away from the cutting machine, and a driven assembly which is arranged at the other end of the corrugated pipe chute; a plurality of spiral pushing pieces are connected between the driving pushing assembly and the driven assembly, and the spiral pushing pieces are used for pushing the metal corrugated pipe. The metal corrugated pipe is stably conveyed and output in the corrugated pipe chute through the contact between the spiral pushing piece and the metal corrugated pipe, so that the cutting machine can conveniently cut the metal corrugated pipe.

The metal corrugated pipe connecting structure comprises a corrugated pipe, a connecting pipe and two stopping pieces, the connecting pipe comprises a pipe body, a sealing sleeve and a double-end clamping ring, the sealing sleeve is annularly arranged on the inner wall of the pipe body, the double-end clamping ring is arranged in the pipe body, the two stopping pieces are arranged at the two ends of the pipe body respectively, and each stopping piece comprises a mounting ring, a rotating baffle and a limiting block; the mounting ring is connected to one end face of the pipe body, the limiting block is fixed to the mounting ring, and the rotating baffle is rotationally connected to the side, facing the double-end clamping ring, of the limiting block; the two corrugated pipes are clamped to the two ends of the double-end clamping ring correspondingly, and the rotating baffles can be pushed by the corrugated pipes to rotate in the direction close to the inner wall of the pipe body when the corrugated pipes enter the pipe body and rotate into wave troughs of the corrugated pipes when the corrugated pipes are clamped to the double-end clamping ring. The double-end clamping ring is arranged to be used for clamping the end faces of the two corrugated pipes, the stopping piece is arranged to be used for being clamped in one wave trough of the corrugated pipes, and therefore splicing of the two corrugated pipes is achieved, the structure is simple, and installation is convenient.

The utility model discloses a steam pipeline drainage recycling device which is used for being connected to a main steam pipeline and comprises a drainage pipeline, a three-way pipe is arranged on the main steam pipeline, and the drainage pipeline is connected with the three-way pipe. A drainage pipeline is arranged at one end of the drainage pipe, a metal corrugated pipe is arranged on the drainage pipeline, the metal corrugated pipe is connected with a three-way pipe, a liquid collection cylinder is arranged at the other end of the drainage pipeline, a liquid recovery pipeline is arranged on the liquid collection cylinder, a liquid drainage pipeline is further arranged on the liquid collection cylinder, and a liquid level sensor is arranged in the liquid collection cylinder; the condensate water drainage device has the advantages that the metal corrugated pipe is arranged on the drainage pipeline, the liquid level sensor is used for monitoring the liquid level of condensate water in the liquid collecting cylinder in real time, when the liquid level of the condensate water reaches a preset alarm value, the liquid drainage pipeline is automatically opened, accurate drainage of the condensate water can be achieved, and the drainage effect is good. Condensate water is effectively prevented from being accumulated in the pipeline, and therefore the operation efficiency and safety of the main steam pipeline are improved.

This invention discloses a forming apparatus for graded pressing of thin-walled, large-angle corrugated ring segments, relating to the field of metal corrugated pipe forming. It includes a forming machine and pre-pressing components and forming pressing molds arranged on the forming machine. The pre-pressing component includes multiple pre-pressing molds arranged sequentially near the forming pressing molds. Each pre-pressing mold includes an upper pre-pressing mold and a lower pre-pressing mold. The top of the lower pre-pressing mold has a pre-pressed corrugated ring segment groove, and the bottom of the upper pre-pressing mold has a pre-pressed corrugated ring segment body fixed thereon. The forming pressing mold includes an upper forming mold and a lower forming mold. The top of the lower forming mold has a forming corrugated ring segment groove, and the bottom of the upper forming mold has a forming corrugated ring segment body fixed thereon. The large-angle corrugated ring segment blanks formed by the multiple pre-pressing molds gradually approach the standard large-angle corrugated ring segment. Through multi-stage progressive forming, the deformation of the arc-shaped blank is evenly distributed in each pressing stage, significantly reducing the incidence of defects such as corrugation cracking, circumferential wrinkling, and non-adherence to the mold.

The invention relates to the technical field of special storage equipment, and provides a chemical raw material anti-leakage storage tank which comprises a tank body. An inner container is fixedly mounted in the tank body, so that leakage of a single-layer tank body is prevented; a feeding hole is fixedly formed in the top of the inner container, and a discharging hole is fixedly formed in the bottom of the tank body; the top end of the feeding port and the bottom end of the discharging port are each fixedly provided with a three-stage sealing assembly, and chemical raw materials in the tank body are prevented from leaking from the connector. By means of a double-layer protection structure formed by the tank body and the inner container, physical isolation is formed on the main body portion of the tank body, even if the inner container is corroded by chemical raw materials or fatigued to generate tiny leakage, the chemical raw materials can be limited in a cavity between the inner container and the tank body and cannot directly leak to the external environment, and the connector can be preliminarily sealed through the annular sealing ring; axial, transverse and angular displacement between the tank body and the pipeline caused by temperature change, pressure fluctuation or external force can be compensated through the metal corrugated pipe.

The invention relates to a retractable air spring bellows (100) with an outer metal bellows hose (111) and an inner metal bellows hose (112), which are coupled by a connecting sleeve (120). In order to stabilize the movement, guide elements (161, 162) are provided, which limit the deviation of the movement of the inner and / or outer metal corrugated hose (111, 112) from the axial direction (X). The guide element may, for example, comprise spacer elements (161, 162) arranged between the connecting sleeve (120) on the one hand and the outer or inner metal corrugated hose on the other hand.

The utility model discloses an inner oil type metal corrugated oil storage tank that can carry out positive pressure sealing test relates to metal corrugated oil storage tank technical field, including the shell body, the lower wall inner surface of shell body is equipped with the core body lower end plate, the inside of shell body is equipped with the core body upper end plate with the position of core body lower end plate corresponds, be equipped with the corrugated core body between core body upper end plate with core body lower end plate, the upper surface both ends of core body upper end plate are equipped with the crossbeam, the both ends of two crossbeams are equipped with the limit end, the lower of shell body with the limit end corresponding position of limit end is passed through and is connected with the sliding limit sleeve, the upper end of limit sleeve is equipped with the limit pin, the limit pin with limit end splices and inserts the connection, the inside of limit sleeve is sleeved with display rod, and the structure is simple, and the operation is convenient to wear pin pull rod, and the product cost of positive pressure resistant structure is reduced greatly.

The utility model discloses a kind of excitation system de-excitation cabinet internal environment monitoring system, including vertical support, control box, two horizontal supports and multiple sensors.The excitation system de-excitation cabinet internal environment monitoring system utilizes the installation mode of horizontal support and installation branch, can increase or decrease the corresponding sensor according to the monitoring needs of de-excitation cabinet internal environment, and adjust the position of sensor, realize the multipoint multi-parameter monitoring in de-excitation cabinet, ensure the reliability of de-excitation operation;Each sensor is installed using metal bellows, so as to facilitate adjusting the position and monitoring angle of sensor, with good installation flexibility;Wiring is carried out using vertical support, horizontal support and metal bellows, so as to ensure the regularity of electrical connection cable.

The invention relates to the technical field of pipeline connectors, and particularly discloses an aircraft pipeline flexible connector which comprises a transfer pipe, a heat insulation pipe is arranged outside the transfer pipe in a sleeving mode, the transfer pipe is a flexible pipe body, the heat insulation pipe is of a metal corrugated pipe structure, a plurality of supporting structures are detachably installed on the transfer pipe, and a plurality of butt joint structures are detachably installed between the supporting structures. The four concave supporting frames are used for being inserted in a relatively staggered mode to form the #-shaped structure, and the supporting frames are oppositely clamped at the two ends of the adapter pipe through the middle space of the #-shaped structure and can be used for being in butt joint with other structures for use; the four concave supporting frames are installed in the middle of the adapter pipe and used for intermittent supporting, contact with a heat insulation pipe arranged outside in a sleeving mode is prevented, and the heat insulation effect is achieved. A liquid cylinder is mounted on the sleeve seat and is used for loading liquid in the liquid cylinder to absorb heat and insulate heat; and a fan is mounted on the sleeve seat, so that the fan is positioned between the staggered end parts of the support frames and is used for forming airflow flowing heat dissipation.

The invention relates to a fuel grading collaborative feeding system based on a coal gangue-RDF circulating fluidized bed. The fuel grading collaborative feeding system comprises a first-stage fuel spraying device, a second-stage fuel feeding device and a plurality of hydraulic supports which are arranged in the circumferential direction of a hearth. A primary fuel air channel, a spiral feeding channel and a coal gas air channel are arranged in the primary fuel sprayer, a secondary coal feeding pipeline is arranged in the secondary fuel feeder, the primary fuel sprayer and the secondary fuel feeder are communicated with a corresponding feeding port of a hearth through a sealing metal corrugated pipe and a sealing flange in a sealing mode, and a hydraulic support is connected with the corrugated pipe to adjust the feeding horizontal deflection angle and the feeding vertical angle. According to the fuel ratio of the system, the synergistic effect of RDF high volatile component rapid heat release and SCG stable combustion heat compensation is fully exerted, and a continuous high-temperature environment is provided for combustion; besides, the specific angle of the material sprayer enables fuel particles to form uniform turbulent flow in the furnace, so that not only is the retention time prolonged, but also full contact with oxygen is promoted, the problem of thermal-mechanical coupling unbalance is effectively solved, and the burn-off rate can reach 93% or above.

The utility model discloses a leakproof metal compensator, which belongs to the technical field of metal compensators and comprises a plurality of layers of metal corrugated pipes arranged concentrically, flanges are welded at the upper end and the lower end of each metal corrugated pipe, and a flexible sealing material layer is filled between the adjacent metal corrugated pipes to form a radial multi-layer buffer structure. A dynamic adjusting sealing structure is arranged at the upper end of the flange and comprises an annular sealing groove formed in the upper end of the inner side of the flange, an annular hollow rubber bag is arranged in the sealing groove and filled with a compressible medium, and a sealing ring is fixedly connected to the top of the annular hollow rubber bag; a plurality of mounting lugs are fixedly arranged on the side of the flange; the annular pressure sensor is arranged at the joint of the flange and the metal corrugated pipe, the synergistic effect of dynamic sealing, graded pressure relief, intelligent corrosion prevention and real-time monitoring is achieved, the safety and reliability of the metal compensator are remarkably improved, and the metal compensator is suitable for high-pressure and high-temperature working conditions of petroleum, chemical engineering, heat supply pipe networks and the like.

The connecting and sealing structure for the metal corrugated pipes comprises the corrugated pipes, reinforcing plates and bolts, the free ends of the adjacent corrugated pipes are folded and stretched outwards to form connecting edges, connecting holes are formed in the middles of the connecting edges, through holes opposite to the connecting holes are formed in the reinforcing plates, and sealing blocking pieces are arranged on blocking edges on the two sides of the reinforcing plates. The adjacent connecting edges are oppositely arranged and penetrate through the through holes and the connecting holes through bolts to be locked, sealing cavities are formed by the connecting edges, the reinforcing plates and the sealing blocking pieces, and the sealing cavities are filled with sealant. The free ends of the corrugated pipes are outwards folded and stretched to form the connecting edges, the connecting edges of the adjacent corrugated pipes are oppositely arranged and combined with the design of the sealing blocking pieces and the reinforcing plates to form the sealing cavity, the adjacent corrugated pipes can be connected through the design of the through holes and the connecting holes in the reinforcing plates, and under the action of the sealant, the sealing effect is greatly improved. The sealing performance of the connecting position of the metal corrugated pipe can be effectively improved, and the service life of the metal corrugated pipe culvert is prolonged.

The utility model belongs to the technical field of metal corrugated pipe machining, in particular to an adjustable positioning device for metal corrugated pipe drilling, and provides the following scheme that the adjustable positioning device comprises a bearing seat and a limiting mechanism installed on the bearing seat, and the limiting mechanism comprises a bearing plate, a clamping block, a screw rod, a first limiting part, a second limiting part, a fixing block, a plug pin, an adjusting screw rod and a limiting plate. The metal corrugated pipe is placed between the two bearing plates, when the metal corrugated pipe is placed, the clamping blocks fixed to the bearing plates are clamped in the grooves of the metal corrugated pipe firstly, then the other clamping block slides slightly to adjust the position, the other clamping block is also clamped in the grooves in the outer wall of the metal corrugated pipe, the adjusting screw is rotated downwards, and the limiting plate is pushed to move downwards; due to the fact that the clamping block is fixedly arranged, the limiting plate over the clamping block is directly connected with the adjusting screw in a rotating mode, the limiting plate can be pushed, the protruding block at the bottom of the limiting plate is clamped in the groove of the metal corrugated pipe, the metal corrugated pipe can be conveniently and rapidly positioned, and it is guaranteed that the metal corrugated pipe is stably positioned.

This invention belongs to the field of tea processing technology, specifically a multi-mode low-temperature roasting process and dedicated equipment for tea. The process includes placement, initial roasting, re-roasting for aroma fixation, and frying stages. Initial roasting is conducted in a closed environment with periodic negative pressure, drawing moisture from the tea stems to the surface and releasing hot, humid air and aroma. The released gas is condensed and dried before being returned to the closed environment to dry the tea leaves from below. Finally, the drying gas forms a pulsed airflow, propelling the tea leaves to tumble and complete the roasting process. The dedicated equipment includes a negative pressure structure, an aroma-fixing structure, and a drying structure. The negative pressure structure changes the internal volume of the shell through the reciprocating expansion and contraction of a metal bellows, creating alternating pressure. The aroma-fixing structure includes a cooling box for condensing moisture and recovering the dried aroma. The drying structure includes an exhaust plate with vents and a disc linked to a rotating rod. This design improves the uniformity and efficiency of dehydration at low temperatures, helping to maintain the shape and aroma of the tea leaves.

The utility model relates to an anti-vibration metal hose, and belongs to the technical field of hoses specially suitable for metal manufacturing. Comprising a metal corrugated pipe of which one end is connected with a first joint and the other end is connected with an inner connecting pipe; the inner connecting pipe is connected with a second joint; the metal corrugated pipe is sleeved with a metal wire mesh sleeve, one end of the metal wire mesh sleeve is fixed to the connecting position of the first connector and the metal corrugated pipe through a first buckle, and the other end of the metal wire mesh sleeve is fixed to the connecting position of the second connector and the inner connecting pipe through a second buckle. The metal wire mesh sleeve is sleeved with a spring, one end of the spring is welded to the outer surface of the first buckle, and the other end of the spring is welded to the outer surface of the second buckle. The metal wire mesh sleeve is sleeved outside an existing metal corrugated pipe, then the spring is clamped outside the metal wire mesh sleeve through the first buckle and the second buckle, vibration borne by the anti-vibration metal hose is absorbed through the metal wire mesh sleeve and the spring, and the anti-vibration capacity of the metal hose is greatly improved.

The utility model relates to the technical field of hoses, in particular to a wear-resistant metal hose assembly which comprises a metal corrugated pipe, a metal woven mesh sleeve is arranged on the outer side of the metal corrugated pipe, a protective layer is arranged between the metal woven mesh sleeve and the metal corrugated pipe, and the protective layer is composed of an outer layer and an inner layer. The outer layer is an aramid fiber woven layer, the inner layer is a spirally wound stainless steel band layer, and an alkali-free glass fiber layer is arranged between the metal woven mesh sleeve and the protective layer. Friction between the metal woven mesh sleeve and the protective layer and the alkali-free glass fiber layer filled between the metal woven mesh sleeve and the protective layer can be effectively reduced, the overall strength of the pipe body is further enhanced, and good shockproof and buffering performance is achieved through the metal corrugated pipe, the protective layer and the asbestos layer filled between the metal corrugated pipe and the protective layer. Local collision friction between the metal corrugated pipe and the protective layer is effectively reduced, and the fatigue resistance of the metal corrugated pipe is improved.

The utility model relates to communication cable technical field, and disclose a kind of communication base station is buried optical cable junction box, solve the problem proposed in background art, it includes box, lid and sealing structure, the joint surface of box and lid is equipped with annular sealing cavity, the sealing cavity is filled with compressible gas, and connect thermal expansion drive assembly, the thermal expansion drive assembly includes metal bellows and working substance cabin, the working substance cabin is filled with working substance with boiling point below 80 DEG C, the utility model, with the sealing performance and reliability of ensuring optical cable junction box, can realize the sealing enhancement and fault alarm of automation, greatly improve the maintenance efficiency and operating stability effect of communication base station infrastructure.