1781 results about "External pressure" patented technology

The invention relates to the technical field of power cables, in particular to a bending-resistant medium-voltage power cable, which is characterized in that a plurality of cable cores are mounted in an outer sheath at equal angles in the circumferential direction, a plurality of supporting pads are uniformly mounted in the outer sheath at equal intervals, and a protective tube is mounted in the middle of the side end surface of each supporting pad; according to the invention, equal unloading of external bending stress and external impact pressure can be realized, and internal and external dual pressure relief can be realized, so that the stress borne by each part of the cable is more balanced, and the reliability of the cable is improved. The minimum bending radius of the cable can be dynamically regulated and controlled, comprehensive regulation and control of bending toughness and bending flexibility of the cable are achieved, the requirements of different use scenes are effectively considered, the application flexibility of the cable is improved, meanwhile, the effective utilization rate of load pressure in the cable can be improved, and the effective service life of the cable is prolonged.

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 invention discloses a bionic flexible tactile sensing monitoring system and method for hoisting a large hydraulic turbine set, and the system comprises a plurality of bionic flexible tactile sensor online monitoring sensors. The online monitoring sensor comprises an air bag cushioning module, a bionic touch sensing unit, a central processing module, a Bluetooth transmission module, a flexible circuit board and an auxiliary circuit. A pressure sensing layer of the bionic touch sensing unit is inspired by a scorpion seam receptor to design bionic crack slotting, and a packaging layer is connected with an air bag cushioning module. The air bag cushioning module transmits external pressure signals to the bionic touch sensing unit, then transmits the external pressure signals to the central processing module, and finally transmits data to the upper computer through the Bluetooth transmission module. According to the device, the accuracy of micro gap detection can be improved, meanwhile, the labor cost can be reduced, the on-line monitoring function is achieved, the hoisting operation time can be shortened, the life safety of workers is guaranteed, and the safety of hoisting work is improved.

The invention discloses an automatic stereoscopic warehouse system for pipe storage, which comprises a goods shelf and a plurality of pipes, and further comprises a plurality of groups of placing racks, two fixing plates are rotatably mounted on each of the plurality of groups of placing racks, the plurality of fixing plates are connected with the goods shelf through a rotating structure, and the rotating structure is used for driving the plurality of groups of placing racks to rotate and lift. The pipes are stored, taken and placed in a rotary mode and matched with a staggered Z-shaped placing method, the effective utilization of the storage space in a warehouse is achieved, the two ends of the pipes are effectively blocked while the pipes are stored, invasion of water and moisture can be prevented, the risk of pipe surface corrosion is reduced, the service life of the pipes is prolonged, and the production efficiency is improved. And in the pipe storage and taking-out process, self-adjusting type loading and unloading opening and closing are conducted on the storage opening, the pipe storage efficiency is greatly improved, deformation caused by external pressure or impact in the pipe storage process can be prevented, and it is ensured that the original shape and performance of the pipe are kept.

The utility model discloses a special-hole combined refractory brick which comprises a refractory brick body and a brick plug used for blocking, the refractory brick body is of a square structure, an observation hole is formed in the center of the refractory brick body, the observation hole is of an oval structure, and the observation hole penetrates through the whole refractory brick body. An observation hole is formed in one side of the refractory brick body, a plug hole is formed in the side, provided with the observation hole, of the refractory brick body, the plug hole is a round notch, the size of the plug hole is larger than that of the observation hole, and a brick plug is installed in the plug hole. As the brick plug is mounted in the plug hole for sealing and preventing the observation hole from being opened all the time, and the safety hole and the safety helmet are mounted on the brick plug, before the brick plug is opened, the safety helmet is opened to check whether safety exists or not, and potential safety hazards caused by large internal and external pressure difference are prevented.

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 provides a high-flux multi-scale integrated non-adhesive flexible riser mechanical property simulation method, which comprises the following steps: establishing RVE of riser models with different layers based on ABAQUS, and applying complex periodic boundary conditions by using MPC to obtain a hysteresis loop of a riser; a self-proposing elastic-plastic constitutive model is used, an FORTRAN language is used for writing a running program, and by adjusting parameters of the constitutive model, the response of the elastic-plastic constitutive model is made to be consistent with a hysteresis loop of a riser RVE; establishing a UEL suitable for the ABAQUS according to the elastic-plastic constitutive model, establishing a large-scale homogenized riser model by using the UEL, and performing analysis and research; and the function of researching the mechanical response of the large-scale non-adhesive flexible riser under stretching, bending, torsion and internal and external pressure loads is realized. According to the method, the mechanical behaviors of the non-cohesive riser model under the complex working conditions are more comprehensively understood, and more accurate guidance is provided for engineering design, material selection and performance optimization.

The invention relates to a process for preforming a composite material (I) in the form of a plate comprising reinforcing fibers bonded together, in particular by a plastic polymer material. In particular, such a process comprises an intermediate forming phase (b) comprising at least the following operations:introducing gas (III) into the second chamber (4), while maintaining the pressure P2 of the second chamber (4) below the external pressure Pext, and in particular atmospheric pressure, when the external pressure Pext is equal to atmospheric pressure, and thereby locally maintaining the upper diaphragm (2) at a distance from the lower diaphragm (1), and while maintaining, at the contact zone (5), both the alignment and the contact between the composite material (I) and the two diaphragms (1 and 2),evacuating gas (III) contained in the first chamber (3), so as to press the lower diaphragm (1) over the entire forming surface (22) present at the bottom (21) of the mold (20).The invention also relates to a device adapted to the implementation of such a process.

The invention discloses a gluing device for display screen substrate processing, and relates to the technical field of display screen substrate processing equipment.The gluing device comprises a gluing processing platform and a conveying mechanism, the conveying mechanism is fixedly installed on one side of the upper end of the gluing processing platform, and the output end of the conveying mechanism is fixedly connected with a gluing machine supporting and transferring rack; and a gluing mechanism body is movably connected to the outer surface of the upper end of the gluing machine supporting and transferring rack. The lower flexible elastic hook plate I, the lower flexible elastic hook plate II and the upper hook plate are jointly matched to form a plurality of groups of opposite bottom supporting structures to support the bottom of the display screen substrate, so that the substrate is prevented from being damaged by pressure generated during dispensing; and through elastic compression of the arc-shaped abutting rebounding protection plates and the abutting stretching plates and the deformation effect of buffering the stacked balloons, the vibration force of external pressure on the base plate can be weakened, and the buffering effect and stability during gluing operation are improved.

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.

Disclosed in the present invention is a fatigue life determination device for a refractory metal elastic element. A movable rod is slidably and sealingly inserted on a pressure bearing cavity; a driving mechanism for driving the movable rod to move reciprocatingly is connected to the movable rod; one end of a fixed rod extends into the pressure bearing cavity, a refractory metal elastic element is abutted between said end and the movable rod, and the other end of the fixed rod extends out of the pressure bearing cavity and a heating furnace and is connected to a vibration frequency detection sensor; a pressurizing channel for high pressure gas to flow is formed in the fixed rod; a pressurizing opening communicated with the pressurizing channel is formed in the end wall of the fixed rod corresponding to the interior of the refractory metal elastic element; an internal pressure connector communicated with the pressurizing channel is formed in the position of the fixed rod located outside the heating furnace; an external pressure connector communicated with the interior of the pressure bearing cavity is formed in a side wall of the pressure bearing cavity; the external pressure connector is communicated with an external pressure pipeline extending out of the heating furnace; and the external pressure pipeline and the internal pressure connector are both communicated with a high-pressure charging mechanism. Thus, the loss rate of temperature and pressure is reduced, and the use requirements of special working conditions are met.

The invention provides a self-locking hydraulic anchor which comprises a hydraulic anchor body, a sliding mandrel capable of making contact with the hydraulic anchor body, an elastic piece connected with the sliding mandrel, a one-way valve and a sealing mandrel. The one-way valve comprises a valve seat arranged in the hydraulic anchor body and a valve element capable of being separated from or making contact with the valve seat. A part of the outer wall of the sealing mandrel and a part of the inner wall of the hydraulic anchor body form a closed cavity, the first end of the one-way valve is communicated with the closed cavity, the second end of the one-way valve is communicated with an inner tubular column of the sliding mandrel, and the sliding mandrel can abut against the hydraulic anchor body under the action of the elastic piece and push the valve element to leave the valve seat at the same time. And the valve element can move away from the hydraulic anchor body under the action of external force, so that the valve element is in contact with the hydraulic anchor body. According to the self-locking type hydraulic anchor, in the reservoir transformation period, the pressure in the self-locking type hydraulic anchor is always larger than the pressure borne by the outside, so that the anchor fluke is in a locked state, a packer is prevented from being unblocked, and an oil pipe is prevented from being communicated with a sleeve.

The invention discloses a high-strength thin-film capacitor support with a compression resistance function, and belongs to the technical field of capacitors. A high-strength thin-film capacitor support with a compression resistance function comprises a first support, and further comprises a second support clamped on the first support; a coating sleeve is arranged between the first support and the second support, and the capacitor is fixedly installed on the coating sleeve. The second bracket and the first bracket are closed end to end; the end-to-end closed annular design and the arc-shaped wall structure are adopted, the overall structural strength is remarkably enhanced, the support can bear large external pressure and does not deform, good deformation adaptability is provided for the support through the design of the first notch and the second notch and the third notch adjacent to the first notch in the arc-shaped wall, and when a capacitor is heated to expand, the support is not prone to deformation. The notches allow the support to be stretched and extended moderately, so that the problem that the support is damaged or the capacitor falls off due to overlarge deformation is avoided.

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.

An electromechanical microsystem including two electromechanical transducers, a first deformable diaphragm and a cavity hermetically containing a deformable medium keeping a constant volume under the action of a change in the external pressure. The first diaphragm forms at least one portion of a first wall of the cavity and has a freely deformable area. The free area cooperates with an external member so that its deformation induces, or is induced by, a movement of the external member. The electromechanical transducers are configured so that a first electromechanical transducer forms a portion of the first wall of the cavity, and a second electromechanical transducer forms at least one portion of the wall opposite to the first wall of the 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 relates to the technical field of precision casting, and discloses a wax pattern module combination device and a combination method thereof.The wax pattern module combination device comprises a rack and further comprises idler wheels arranged on the rack and used for assisting the rack in moving; the lifting mechanism comprises a working platform which is fixedly arranged on a sliding plate and is used for placing a lower die; the rotating mechanism is assembled on the machine frame, and a gear transmission set included in the rotating mechanism is connected with a connecting piece used for being connected with an upper die; the lifting mechanism and the rotating mechanism are matched with each other, so that the wax mold can be accurately lifted and adjusted and can rotate by 360 degrees, and manual mold turning is not needed. The machine frame is further provided with a purification mechanism capable of discharging wax smoke generated when the wax mold is assembled, the purification mechanism is matched with an air inlet mechanism arranged on the machine frame to conduct air injection on the wax mold so that the temperature of the wax mold can be maintained at a normal value, shrinkage of the wax mold can be controlled, and meanwhile the effect of maintaining balance of internal pressure and external pressure of a workshop is achieved.

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.

The utility model discloses a novel capacitive MEMS pressure sensor, which comprises a sensitive structure layer, a bonding layer and a bottom plate layer which are sequentially arranged from top to bottom, and a closed vacuum cavity is defined by the sensitive structure layer, the middle part of the bottom plate layer and the bonding layer; the sensitive structure layer comprises a sensitive layer frame and a sensitive layer capacitance plate, and the bottom plate layer comprises a bottom layer outer frame and a bottom layer capacitance plate; the middle parts of the sensitive layer frame and the bottom layer outer frame are correspondingly provided with a sensitive layer capacitance plate and a bottom layer capacitance plate respectively; the peripheral side of the sensitive layer capacitance plate is connected with the sensitive layer frame through a sensitive layer elastic film; a capacitance gap located in the vacuum cavity is formed between the sensitive layer capacitance plate and the bottom layer capacitance plate. Deformation under the action of external pressure mainly occurs at the elastic thin film, the deformation quantity of the sensitive layer capacitance polar plate is small, the linearity between the capacitance value variation and the air pressure or pressure variation is effectively improved, and good practicability is achieved.