1329 results about "External pressure" patented technology

The invention relates to the technical field of data processing, in particular to a subway shield tunnel segment external pressure control system based on automatic monitoring, and the system comprises a setting module which is used for setting a pressure sensor, a position sensor and a strain sensor on a segment by precisely recognizing the structure of the segment; the data acquisition module acquires sensor data in real time based on a preset frequency; the pressure analysis module draws a pressure change diagram and judges that the pressure of the duct piece is abnormal, or adjusts the preset frequency; the deformation analysis module receives the deformation analysis instruction, determines the deformation degree of the duct piece based on a radial deformation degree determined based on a plurality of real-time positions and an annular strain degree determined based on a plurality of real-time resistance values, and adjusts a water pressure threshold value according to a comparison result of the deformation degree and a preset deformation degree to generate a drainage instruction; the drainage module receives a drainage instruction and determines the opening number and distribution of water diversion ports based on adjustment of a preset water pressure threshold value and the segment deformation degree. The safety of the metro shield tunnel segment structure is guaranteed.

The invention provides a flexible pressure sensor, which comprises a flexible support body provided with a sensing area; the sensing layer is arranged in the flexible supporting body and located in the sensing area, the sensing layer comprises a plurality of sensing bodies, the sensing bodies are stretchable conductors, each sensing body comprises two interface parts, two connecting parts and a sensing part, the two interface parts are connected with one ends of the two connecting parts respectively, the other ends of the two connecting parts are connected with the two ends of the sensing part respectively, and the sensing parts are connected with the flexible supporting body. The two interface parts are used for being connected with external equipment, the sensing part is bent between the two interface parts in a preset shape, and the sensing part is used for sensing external pressure. The sensor is long in service life, and the flexible material can bear omnidirectional force in a measuring range without being damaged; the sensor is soft and can be integrated with clothes and other soft materials; in addition, the sensor is stable in temperature and humidity and is less affected by environment temperature and humidity.

The invention discloses a space enclosing structure air tightness reduced scale test device, which comprises a reduced scale space enclosing structure, a main body structure which is reduced in scale according to a proportion and typical leakage paths which are arranged in an equal proportion, the material, the thickness, the structure and the construction process of the main body structure are consistent with those of an actual project; the model, the size and the installation process of the typical leakage path are kept consistent with those of an actual project; the environment control system comprises a reduced scale enclosure structure internal environment control device and an airtight door and window environment control device, the reduced scale enclosure structure internal environment control device can control the internal temperature and pressure of the reduced scale enclosure structure, and the airtight door and window environment control device can control the external pressure of an airtight door and an airtight window; according to the invention, the enclosure structure air tightness reduced scale test device is highly consistent with an actual engineering leakage path, so that the consistency of leakage data and actual engineering is ensured, the air tightness data is accurate and reliable, and the method can be used for actual engineering design calculation.

The invention discloses a monitoring method and a control device for pressure abnormity of a storage tank and oil storage equipment. The storage tank pressure abnormity monitoring method comprises the following steps: acquiring an internal air pressure value of a first storage tank and an external air pressure value of the first storage tank, and subtracting the internal air pressure value from the external air pressure value to obtain an air pressure difference P delta 1; when P delta1 is not in the range of [-P1,-P2] or [P3, P4], after first set time is up, the internal air pressure value of the first storage tank and the external air pressure value of the first storage tank are obtained again, the internal air pressure value is subtracted from the external air pressure value to obtain an air pressure difference, and the air pressure difference is still not in the range of [-P1,-P2] or [P3, P4]; and if yes, sending reminding information for reminding that the breather valve is abnormal. According to the storage tank pressure abnormity monitoring method, the control device and the oil storage equipment, the internal and external pressure change of the storage tank can be monitored, the abnormal condition of the breather valve can be recognized in time, an operator is reminded to dispose in time, and the operation safety of the storage tank is improved.

The invention belongs to the field of flange machining clamps, and particularly relates to an aluminum product flange product machining clamp which comprises a fixing disc fixedly connected with an external workbench through bolts, a loading groove is formed in the middle of the upper side of the fixing disc, a supporting mechanism is arranged in the loading groove, and a driving disc is arranged above the fixing disc. A through opening matched with the loading groove is formed in the surface of the driving disc, a plurality of guiding assemblies distributed in the circumferential direction of the fixing disc are jointly arranged between the lower side of the driving disc and the upper side of the fixing disc, and four clamping mechanisms distributed in the circumferential direction of the fixing disc are arranged on the upper side of the fixing disc. And a locking assembly for controlling the driving disc to start and stop is arranged between the fixed disc and the driving disc. According to the special-shaped flange clamping device, a special-shaped flange similar to a square can be rapidly clamped, meanwhile, the inner wall of a through hole of the special-shaped flange can be supported in the clamping process, and therefore the risk that an aluminum flange deforms due to external pressure in the clamping process is reduced.

The invention discloses a compressed air energy storage cavern rock sample test device which comprises a surrounding rock simulation module, the surrounding rock simulation module is installed on a frame, the top and two sides of the frame are connected with pressure loading modules, the surrounding rock simulation module is connected with a gas storage simulation module and a monitoring module, and the surrounding rock simulation module is a composite rock sample. The surrounding rock simulation module comprises a rock layer, an isolation layer and a sealing layer from outside to inside, the rock layer is a natural rock sample in the cavern, the isolation layer is concrete, the sealing layer is a steel lining, and a tunnel is formed in the center of the surrounding rock simulation module. The surrounding rock simulation module is made of a natural rock sample, a concrete isolation layer and a steel lining sealing layer, is used for simulating the structure of the surrounding rock of the cavern, is the same as the structure in a real compressed air energy storage cavern, can accurately reflect the structure and characteristics of the actual surrounding rock of the cavern, and can simulate the structure of the surrounding rock of the cavern through the synergistic effect of the gas storage simulation module and the external pressure loading module. And the actual working environment of the compressed air energy storage cavern can be really simulated.

The utility model provides an automatic bending device for a material belt, and belongs to the technical field of roll material processing equipment. The problem that the process of bending the head of the metal strip needs to be manually completed by workers is solved. The clamping mechanism, the pressing mechanism and the feeding mechanism are arranged on the machine frame, the clamping mechanism is used for clamping a material belt, the pressing mechanism is used for bending the material belt, the feeding mechanism is used for conveying the material belt, the clamping mechanism comprises an upper clamping block and a lower clamping block, and a material passing gap is formed between the upper clamping block and the lower clamping block. The feeding mechanism feeds a material belt into the material passing gap and forwards extends out of the material passing gap; the pressing and leaning mechanism comprises a pressing block and a driving mechanism for driving the pressing block to move, and the pressing block presses the material belt to enable the material belt to be bent so that the head of the material belt can be bent to form a hook. The bending device has the advantages that the material belt is clamped through the clamping mechanism, then the pressing block is moved to push the head of the material belt to be bent, the automation degree is high, the working efficiency is greatly improved, and time and labor are saved.

The invention discloses a sealing silica gel ring anti-cracking performance detection device, and relates to the silica gel ring performance detection field, the sealing silica gel ring anti-cracking performance detection device comprises a detection table, a cylinder body and an external pressing mechanism, the external pressing mechanism comprises a U-shaped frame body and a pushing assembly, the inner side of the U-shaped frame body is provided with an accommodating groove, the pushing assembly comprises a connecting rod, one end of the connecting rod is rotatably connected with the U-shaped frame body, and the other end of the connecting rod is rotatably connected with the cylinder body; the other end of the connecting rod is rotationally connected with pushing wheels, and the two pushing wheels push the silica gel ring to enable the silica gel ring to arch outwards. Through the arrangement of the external pressure mechanism, the symmetrically distributed pushing wheels can hunch up part of the area of the silica gel ring, so that the crack detection capability is enhanced, closed or microscopic cracks on the surface of the silica gel ring can be effectively expanded, and the cracks are obviously amplified in the hunched parabola-like area; the silica gel ring is driven to roll continuously in the circumferential direction by combining the composite motion of rotation and axial movement of the barrel, it is ensured that the whole surface of the silica gel ring is subjected to the stretching and arching process, and a blind area of traditional single-point detection is eliminated.

The utility model discloses a gas storage tunnel transformed based on a waste chamber of a hydropower station, which belongs to the technical field of underground energy storage and comprises a backfill concrete layer, a reinforced concrete lining and a flexible concrete sealing layer which are sequentially poured on a surrounding rock of a chamber wall, and the cross section of the inner wall of the backfill concrete layer is circular. A plurality of water drainage floral tubes are arranged on the inner wall of the chamber at intervals in the circumferential direction of the chamber, the length direction of the water drainage floral tubes is consistent with the length direction of the chamber, the water drainage floral tubes penetrate through the two ends of the whole chamber, and a plurality of through holes are evenly distributed in the wall of each water drainage floral tube. During operation, the air tightness of the gas storage tunnel can be fed back through the exhaust condition in the drainage floral tube, meanwhile, external pressure water can be collected and discharged through the drainage floral tube, and damage to a lining of the gas storage tunnel is avoided; the flexible concrete sealing layer not only can adapt to deformation of the inner wall of the chamber caused by internal air pressure, but also can play a sealing role, so that the abandoned chamber of the hydropower station can be used as an underground gas storage of a compressed air energy storage power station.

The utility model discloses a sealing threaded connector which comprises a coupling and a pipe body meshed with the coupling, and the pipe body is connected with the coupling through threads. An external thread, an outer sealing surface and an outer shoulder surface are sequentially arranged on the upper surface of the pipe body from the middle part to the end part; an internal thread, an inner sealing surface and an inner shoulder surface are sequentially arranged on the lower surface of the coupling from the end part to the middle part; the external thread is matched with the internal thread, the outer sealing face is matched with the inner sealing face, and the outer circular bead face is matched with the inner circular bead face. The threaded connector has reliable connection strength and sealing performance under the complex working conditions of internal and external pressure, bending load, compression load, tensile load and the like.

The invention discloses a pressure detection system, and relates to the technical field of intelligent wearing, and the pressure detection system comprises 1) a flexible substrate layer which is used for fitting skin and sensing external tiny pressure changes; the micro-column array layer is composed of a plurality of micro-column structures and used for amplifying and conducting the pressure change sensed by the flexible substrate layer; the flexible gel sensing layer is used for receiving the pressure transmitted by the micro-column array layer and generating an electric signal; 4) a packaging layer; an interdigital electrode layer is arranged in the flexible gel sensing layer, an electric signal of the flexible gel sensing layer changes along with the change of external pressure, and the detection of a pressure electric signal is realized through the interdigital electrode layer. By means of the design, high-sensitivity response to tiny pressure changes can be achieved, micro-pressure signals are remarkably amplified, meanwhile, the problem of hysteresis effect generally existing in traditional silica gel or metal film materials is solved, and therefore the response speed of the sensor is greatly increased.

The utility model relates to the technical field of oil field underground oil extraction tools, and discloses a deep well fracturing packer rubber sleeve, which comprises an outer layer flexible sealing ring, an inner layer flexible sealing ring, an inner layer flexible sealing ring and an outer layer flexible sealing ring, and the outer layer flexible sealing ring is used for adapting to the surface of a well wall and realizing sealing; the middle composite buffer layer is used for buffering external pressure and absorbing stress generated by expansion; the inner-layer rigid supporting framework is used for providing structural support and limiting the expansion range of the rubber sleeve; the outer layer flexible sealing ring is of a gradient type flexible protruding structure. According to the utility model, the outer-layer flexible sealing ring adapts to an irregular well wall and realizes tight sealing through a gradient structure and micro lines, the middle composite buffer layer absorbs external pressure and disperses expansion stress, the anti-fatigue capability of the rubber sleeve is enhanced, and the inner-layer rigid supporting framework controls deformation through the supporting ribs and the compensation grooves; and the long-term stability of the rubber sleeve under high-pressure and high-temperature conditions is ensured.

In some embodiments, a pressure sensor may comprise a housing, a flexible membrane which, together with the housing, forms a hermetically closed cavity, a sensor element arranged in the hermetically closed cavity, and a gaseous medium in the hermetically closed cavity. The sensor may detect a change in a physical property, of the flexible membrane, associated with an external pressure pressing inward into the flexible membrane of the hermetically closed cavity.

The utility model relates to the technical field of corrugated pipes, and discloses a high-flexibility corrugated pipe which comprises a corrugated pipe body, a corrugated pipe outer wall is fixedly connected to the side face of the corrugated pipe body, the side face of the corrugated pipe outer wall is corrugated, a corrugated pipe inner container is fixedly connected to the side face of the corrugated pipe outer wall, and the corrugated pipe inner container is fixedly connected to the side face of the corrugated pipe body. The side face of the corrugated pipe body is fixedly connected with a connecting device, and the side face of the connecting device is fixedly connected with an anti-skid connector. The resin outer layer, the polyethylene layer and the silica gel inner layer are adopted in the main pipe body, the flexibility is high, the gaps are formed between the adjacent corrugated rings, and therefore the corrugated pipe can be bent at will, the overall flexibility of the corrugated pipe is effectively enhanced through the combined structure of the corrugated pipe outer wall and the corrugated pipe inner container, and the service life of the corrugated pipe is prolonged. The corrugated outer wall design not only endows the corrugated pipe with greater deformability, but also can uniformly disperse stress when bearing external pressure, reduces the risk of rupture, and ensures the stability and safety of fluid or gas in the transmission process.

The invention discloses an outer-rigid and inner-flexible stadium annular roof structure system and a construction method thereof. The system comprises an outer rigid structure and an inner flexible structure. The peripheral rigid structure comprises supporting columns, V-shaped supporting pieces and a grid frame. The supporting columns are radially distributed on the outer ring of the annular roof structure around the center of the annular roof structure. The V-shaped supporting pieces correspond to the supporting columns one to one and are located on the inner sides, opposite to the supporting columns, of the roof structure. The grid frame is fixed to the top ends of the supporting columns and the V-shaped supporting pieces. The inner flexible structure comprises an annular cable and a radial cable; the ring cable is arranged on an inner ring of the roof structure; one end of the radial cable is fixed with the V-shaped supporting piece, and the other end is fixed with the ring cable. A giant outer pressing ring form of a traditional cable bearing structure is abandoned, the peripheral rigid structure and the inner surrounding flexible structure are combined, the rigidity of the peripheral rigid structure is used as a support of the flexible structure, the stress mode of the grid frame structure is improved, the rigidity of the inner surrounding cable structure is improved, and the steel consumption of the peripheral rigid structure is reduced.

The invention discloses a battery unit, a photovoltaic module and a packaging method of the photovoltaic module, relates to the technical field of photovoltaics, and aims to solve the problem that the risk of fragmentation exists in a lamination process due to the fact that the mechanical strength of a battery piece with holes is reduced. The battery unit comprises a battery piece and a filling material layer. The battery piece comprises a first surface and a second surface which are opposite to each other, the first surface comprises a hole which concavely extends from the first surface to the second surface, the filling material layer is arranged in the hole, and the filling material layer is a photocuring material or a thermocuring material. When the cell is subjected to external pressure, the filling material layer arranged in the hole is a photocuring material or a thermocuring material and can be in tight contact with the wall of the hole, so that the wall of the hole can be strongly supported, stress can be effectively dispersed, multi-path conduction of pressure can be realized, the probability that the cell is broken in a lamination process is reduced or eliminated, and the reliability of the cell is improved. Therefore, the yield of the photovoltaic module is improved.

The utility model discloses a packaging carton edge folding device, and relates to the technical field of carton processing. The device comprises a workbench, the top end of the workbench is fixedly connected with two supporting plates, the inner surfaces of the two supporting plates are both rotationally connected with short rods, one end of one supporting plate is fixedly connected with a first motor, the output end of the first motor is fixedly connected with one end of one short rod, and the output end of the second motor is fixedly connected with one end of the other short rod. The opposite ends of the two short rods are fixedly connected with rotating plates, the opposite ends of the two rotating plates are jointly and rotationally connected with a cross rod, the lower portion of the outer surface of the cross rod is fixedly connected with a lifting rod, the bottom end of the lifting rod is fixedly connected with a lifting plate, and a conveying groove is formed in one end of one supporting plate. Through the arrangement of the first motor, under the action of the first motor, the device can completely fold a paperboard, the strength of the whole structure of a carton is improved, and the weight of objects contained in the carton and external pressure can be better borne.

An unclamping arm includes a right fulcrum section, a left fulcrum section, a cam follower, and pressing sections. The right and left fulcrum sections are rotatably supported within a spindle head. The cam follower, in conjunction with the movement of the spindle head, 5 contacts a cam surface provided to an upright column, and receives external pressure. As a result of the cam follower receiving external pressure, the pressing sections rotate about the right and left fulcrum sections, thereby pressing or not pressing pins of a draw bar provided within a spindle. The pressing sections are positioned between the cam follower and the right and left fulcrum sections; the right fulcrum section, the left fulcrum section, and the pressing sections are 10 positioned on a straight line intersecting the axial direction of the spindle; and the cam follower is positioned separated to the upright column-side from the right and left fulcrum sections.

The pressure detection system for the external counterpulsation device can measure the actual pressure value of an air bag and comprises an air storage tank and an air compressor, the air storage tank is communicated with the air bag through an inflation and deflation pipeline, and pressurization and deflation are conducted between the air storage tank and the inflation and deflation pipeline through an inflation and deflation valve. The pressure monitoring unit monitors the pressure in the air bag in real time and transmits a signal to the control unit, the control unit controls the inflating and deflating valve to pressurize and deflate the air bag, the pressure monitoring unit comprises a pressure collecting pipe, the near end of the pressure collecting pipe is communicated with an inner cavity of the air bag, and the far end of the pressure collecting pipe is communicated with an external pressure sensor. The pressure in the air bag is directly collected through the pressure collecting pipe, namely, the current treatment state can be known more accurately by directly monitoring the pressure of the air bag, and a better treatment scheme is provided for a patient; meanwhile, the pressure sensor is arranged outside and is not affected by factors such as the temperature in the air bag, the impact force of airflow and vibration, and the precision of the pressure sensor is high.

The invention provides an integrated pressure protection double-layer corrugated pipe vibration reduction pipe, and belongs to the field of vibration absorbers. An interlayer cavity is formed in the pipe wall of the vibration reduction pipe; gap grooves are formed in the middles of the outer end faces of the flange plates, so that steps are formed on the outer end faces of the flange plates around the edge portions of the gap grooves, and inlet holes and outlet holes are formed in the gap grooves of the two flange plates respectively. The safety valve and the one-way valve are arranged in the interlayer cavity and connected to the inlet hole and the outlet hole, the safety valve allows or limits the medium to enter the interlayer cavity through the inlet hole according to whether the external pressure exceeds the preset pressure, and the one-way valve limits the medium to flow out of the interlayer cavity only through the outlet hole. The safety valve is arranged, so that a medium in the inner layer of the pipeline enters the interlayer cavity, the pressure value in the inner layer of the pipeline is reduced, the pressure of the medium is prevented from exceeding the yield limit of an inner-layer corrugated pipe material, and the medium entering the interlayer cavity can flow back to a low-pressure area through the one-way valve; and the safety and the reliability of the double-layer corrugated pipe vibration reduction pipeline are improved.

The invention provides a resonant pressure sensor with adjustable measuring range and sensitivity, and relates to the technical field of sensors, and the resonant pressure sensor comprises a pressure sensitive film which is used for detecting external pressure; the resonator layer comprises a double-end clamped resonant beam, the double-end clamped resonant beam is arranged above the pressure sensitive film, a movable part of the double-end clamped resonant beam is suspended, one side of the double-end clamped resonant beam is provided with two driving electrodes for applying an alternating current driving signal and a parameter pumping alternating current signal respectively, and the other side of the double-end clamped resonant beam is provided with two detection electrodes; the silicon sealing cover layer is provided with a resonant cavity, and the resonant cavity is located above the pressure sensitive film and the double-end clamped resonant beam and used for providing a deformation space for the pressure sensitive film and providing a vibration space for the double-end clamped resonant beam; in the first working mode, the first-order mode of the resonant beam is split into two amplitude peak values by applying a parameter pumping alternating current signal, and the sensitivity of the output amplitude ratio is adjusted by adjusting the amplitude of the parameter pumping alternating current signal; the measurement range is adjusted by adjusting the frequency of the parameter pumping alternating current signal.

The utility model discloses a prefabricated lining structure of a high-pressure gas storage in the technical field of underground energy storage, which comprises prefabricated lining segments and a movable caulking sliding block, the splicing end of each prefabricated lining segment is provided with a pinnacle along the length direction of the prefabricated lining segment, so that the splicing ends of two adjacent prefabricated lining segments form an X-shaped groove, and the movable caulking sliding block is arranged in the X-shaped groove. The movable joint filling sliding block is arranged between the two prefabricated lining segments, and the cross section of the movable joint filling sliding block is matched with the cross section of the X-shaped groove. The X-shaped grooves are formed in the splicing ends of the adjacent prefabricated lining segments, the X-shaped movable joint filling sliding blocks are arranged in the X-shaped grooves, the X-shaped grooves can be sealed through the movable joint filling sliding blocks regardless of internal pressure or external pressure, and when the prefabricated lining segments deform outwards or inwards due to the internal pressure and the external pressure, the movable joint filling sliding blocks can seal the X-shaped grooves. The movable caulking sliding blocks can slide outwards or inwards along with the prefabricated lining segments, it is ensured that the movable caulking sliding blocks can seal the adjacent prefabricated lining segments all the time, and therefore the sealing effect of the whole cavern lining is improved.

The invention provides a piezoresistive sensor, a piezoresistive sensor structure and a manufacturing method thereof, the piezoresistive sensor can simulate the magnitude of external pressure borne by the piezoresistive sensor structure by adjusting the voltage difference between two pressure simulation electrodes, and can simulate the magnitude of external pressure borne by the piezoresistive sensor structure by adjusting the driving voltage of the piezoresistive sensor structure. Therefore, the piezoresistive sensor can be used for generating excitation-response pairs required by the PUF technology, so that the PUF key technology can be realized on the piezoresistive sensor. The piezoresistive sensor structure comprises a first substrate and a second substrate arranged below the first substrate, the upper surface of the second substrate is provided with a cavity, and a sensitive film is formed in the first substrate area above the cavity; the Wheatstone bridge structure is arranged on the first substrate; a first pressure simulation electrode is arranged on the surface, facing the cavity, of the sensitive film; and a second pressure simulation electrode is arranged on the surface of the second substrate at the bottom of the cavity.

The invention relates to the field of aircrafts, and discloses a sandwich-structured composite material mute paddle, which comprises a paddle blade, and the paddle blade is a sandwich carbon fiber laminated structure composed of an upper layer prepreg laying layer unit, a foam sandwich layer and a lower layer prepreg laying layer unit; the upper-layer prepreg laying unit and the lower-layer prepreg laying unit are each of a bionic spiral structure formed by stacking multiple layers of composite material prepreg sheets in a bionic spiral laying sequence. The invention further discloses the preparation method of the composite material mute paddle of the sandwich structure. Load can be effectively transmitted and dispersed along fiber paths in different directions in the outer-layer prepreg bionic spiral structure, so that the comprehensive rigidity, the torsional property and the damage tolerance of the paddle are improved, the material characteristics are optimized, a three-section type pressurization method is adopted, a stable external pressure environment is established in the early stage of paddle foaming, and the mechanical performance of the paddle is improved. And dynamic balance and collaborative forming of internal and external pressure in the paddle forming process are achieved.

The utility model relates to the field of gas films, and discloses a gas film gas storage device of a carbon dioxide energy storage system, which comprises an inner film, an outer film and a gas storage layer, an interlayer cavity used for containing air is formed between the outer film and the inner film; the carbon dioxide inflation and deflation pipeline is communicated with the inner cavity through an inflation and deflation port in the inner film, carbon dioxide can be introduced into the inner cavity through the carbon dioxide inflation and deflation pipeline, and the carbon dioxide in the inner cavity can be discharged from the carbon dioxide inflation and deflation pipeline; the connecting structure is used for communicating the carbon dioxide inflation and deflation pipeline with the inflation and deflation port of the inner membrane; and an anti-blocking device is arranged on the inner wall of the inflation and deflation port of the inner film. In the application, when the carbon dioxide in the inner cavity is discharged outwards, the pressure in the inner cavity is reduced, and the difference between the internal pressure and the external pressure also cannot enable the inner film to cover and block the inflation and deflation port, so that the inflation and deflation work of the inflation and deflation port is not influenced.

The utility model relates to an energy storage device and an energy storage system. The energy storage device comprises a box body and a battery, the box body comprises a plurality of wall plates, and the wall plates are connected and define a containing cavity; the battery is arranged in the accommodating cavity; wherein at least one wall plate is provided with a pressure relief part, and the pressure relief part and the wall plate are integrally formed; the pressure relief part is provided with a first notch groove, and the pressure relief part is configured to be capable of cracking along at least one part of the first notch groove so as to open the pressure relief part. According to the energy storage device, the pressure relief function is integrated on the wall plate, so that the box body has the pressure relief function, the use of an external pressure relief plate can be reduced, the purchase and installation requirements of equipment are reduced, the purchase and maintenance cost is reduced, the material and manufacturing cost is reduced, the overall cost is reduced, meanwhile, the installation process is simplified, the maintenance complexity is reduced, and the production efficiency is improved; and the pressure relief part can directly respond to the pressure change in the box body, so that the pressure relief efficiency can be improved, the explosion risk can be reduced, and the safety of the energy storage device can be improved.

The invention relates to the technical field of multi-petal grab buckets, in particular to a self-cleaning type double-rope multi-petal grab bucket which comprises a supporting mechanism, an inner scraping mechanism installed on the supporting mechanism and an obstacle removing mechanism installed in the supporting mechanism, and the obstacle removing mechanism is arranged in the middle of the inner scraping mechanism; the supporting mechanism comprises a force arm and a plurality of first chucks installed on the force arm. Existing single-face jaw plates are arranged into the spliced double-face jaw plates, after the built-in half jaw plate firstly stretches into materials, waste steel bars in concrete can be sorted and grabbed, after the external jaw plate is closed, clamped solidified waste can be pressed and cut off, and finally along with operation of a crane, the waste steel bars in the concrete can be sorted and grabbed. When concrete adheres to the inner wall of the external jaw plate, half of the internal jaw plate can shovel away the concrete on the inner wall of the external jaw plate, and at the moment, the structure can prevent sharp objects in materials from abrading the external pressure-resistant jaw plate.

The utility model discloses a multi-layer weft reinforced steel skeleton plastic composite pipe, which relates to the field of steel-plastic composite pipes and comprises a pipe body with thermoplastic plastic as a base body, and an internal reinforced phase is arranged between the inner wall and the outer wall of the pipe body. The internal reinforcement phase comprises a warp layer and a weft layer, the warp layer is composed of a plurality of steel wires arranged in the axial direction of the pipe body, and the weft layer is composed of steel wires spirally wound in the circumferential direction of the pipe body; a plurality of warp steel wires and weft steel wires are spirally wound and welded to form a steel mesh framework; at least two layers of weft layers are continuously arranged, and the contacted weft layers are arranged in the same rotating direction. According to the utility model, the at least two weft layers are spirally wound on the warp layer, the contacted weft layers are arranged in the same rotating direction, and the outer weft steel wires are arranged on the inner weft steel wires in a contact manner, so that the ring stiffness of the pipe is improved, and high internal pressure resistance and external pressure resistance are provided.

The invention provides an underwater high-pressure dry type welding cabin test verification method, and relates to the technical field of sunken ship salvage, and the method comprises the following steps: testing the sealing performance and effectiveness of a magnetic adsorption mechanism and a rubber seal on a welding cabin under the 300-meter environmental water pressure under the action of the designed magnetic adsorption force and the 5-meter internal and external pressure difference; testing the sealing performance of the watertight door on the welding cabin under the environment water pressure of 300 meters, including testing the effectiveness of opening and closing of the sealing door and the effectiveness of sealing of the sealing door; according to the invention, subsystem process tests such as a high-pressure adsorption sealing test, a watertight door high-pressure functional test, an air pressure control system high-pressure test, a propulsion ballast system shallow water test, a robot high-pressure action test, a welding process laboratory inspection and the like, a pool test of an integrated system, a shallow water functional test and a final sea test are carried out; a scientific, rigorous and complete test verification system is formed, and the feasibility of the underwater high-pressure dry-type welding cabin is fully proved.

The invention provides a plastic instant-closing type sealed container which comprises a cover body and a cup body, the cover body and the cup body are each provided with an open edge and a closed far end, a liquid outlet is formed in the closed far end of the cover body, a sealing cover capable of being opened and closed for multiple times is arranged at the liquid outlet, the cup body is used for storing manufactured food, and the cup body is used for storing the manufactured food. After the cup body stores made food, the edge of the cover body and the edge of the cup body are connected and sealed, so that the cover body and the cup body form a whole, the situation that the cover body is separated from the cup body due to external pressure is avoided, the food in the cup body can be eaten repeatedly by opening and closing the sealing cover, the food can be stored in a sealed mode, and the use is convenient. The cup is simple in structure and convenient to carry and transport, the cover body and the cup body are both made of plastic materials, the body of the cover body 10 is formed in an injection molding mode, the manufacturing process is simple, and cost is low.