1025 results about "External pressure" patented technology

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 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 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 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 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 utility model relates to the technical field of filter element equipment, and particularly discloses a spring pressure filter unit which comprises an elastic filter element, and the elastic filter element comprises a connecting piece, an elastic piece and a filter screen bag covering the outer side of the elastic piece; the connecting piece is located at one end of the elastic piece, the elastic piece is connected with an external supporting plate through the connecting piece, the filter screen bag is provided with an inner cavity used for containing the elastic piece, and a through hole communicated with the inner cavity of the filter screen bag is formed in the connecting piece; external mixed water is filtered and separated into filtered water and filter residues through the filter screen bag, and the filtered water enters the inner cavity of the filter screen bag and is discharged through the through hole. According to the utility model, the filter unit is elastically deformed along with the change of external pressure through the elastic piece and vibrates, and filter residues on the filter screen bag are separated from the filter screen bag through the vibration, so that the automatic cleaning of the filter screen bag is realized, and the filter efficiency is improved.

The utility model discloses a pressure-resistant MPP electric power pipe, which comprises an inner pipeline and a buffer pressure-resistant outer pipe, the buffer pressure-resistant outer pipe is sleeved on the outer wall of the inner pipeline, the buffer pressure-resistant outer pipe comprises a connecting pipe and a protective pipe, the connecting pipe is slidably connected on the outer wall of the inner pipeline, a buffer cavity is formed between the protective pipe and the outer wall of the connecting pipe, and the protective pipe is sleeved on the buffer cavity. A plurality of evenly-distributed arc-shaped buffer plates and buffer pipes are fixedly connected into the buffer cavity, the arc-shaped buffer plates are arranged at equal intervals and fixedly connected with the outer wall of the connecting pipe, the outer surfaces of the arc-shaped ends of the arc-shaped buffer plates abut against the inner wall of the protective pipe, and the buffer pipes are arranged between every two adjacent arc-shaped buffer plates. The buffer pipes are fixedly connected with the two adjacent arc-shaped buffer plates and abut against the inner wall of the protection pipe. The arc-shaped buffer plates and the buffer pipes which are uniformly distributed are arranged in the buffer cavity, so that external pressure borne by the protective pipe can be effectively absorbed and dispersed, and deformation and fracture caused by the fact that the local part of the inner pipeline suffers from the external pressure are reduced.

The invention relates to an armored temperature and pressure integrated sensor and a manufacturing method, and the sensor comprises an armored housing which comprises a housing body and a sleeve connected with the housing body, and the sleeve is internally provided with a closed cavity; the circuit board is arranged in the armored shell; the temperature sensing element is mounted in the closed cavity; the support is arranged in the armored shell and comprises a support body, a metal terminal is arranged in the support body, one end of the metal terminal extends into the armored shell to be connected with the temperature sensing element, and the other end of the metal terminal extends out of the support body to be connected with the circuit board; and the pressure sensing element is mounted in the bracket and connected with the circuit board, and the pressure sensing element is used for detecting the pressure of an external pressure source. While temperature and pressure are measured synchronously, the excellent performance of the armored shell effectively protects internal elements from external physical impact, electromagnetic interference, severe temperature fluctuation and the like, it is ensured that the sensor can work stably and reliably in a complex environment and a complex medium, and the measurement precision is ensured.

The invention relates to the technical field of plastic track materials, and discloses an environment-friendly anti-skid plastic track material and a preparation method thereof, the environment-friendly anti-skid plastic track material comprises the following raw materials by mass: 50-55 parts of hyperbranched polyethylene, 10-15 parts of an anti-skid wear-resistant filler, 5-8 parts of a plastic flexibilizer, 45-50 parts of an inorganic filler, 1-2 parts of a plastic foaming agent, and 1-2 parts of a dispersant. The anti-skid and wear-resistant filler can generate large resistance in the plastic track material, increase the friction coefficient, enhance the anti-skid capacity of the plastic track material, effectively disperse pressure, reduce local wear and improve wear resistance, and in addition, the anti-skid and wear-resistant filler can form a network structure capable of absorbing and weakening external pressure in the plastic track material, so that the anti-skid and wear-resistant performance of the plastic track material is improved. The impact resistance and the bearing capacity of the plastic runway can be enhanced, so that the plastic runway is not easy to crack or break under the action of external force.

The utility model provides a small-diameter six-arm caliper which comprises an upper connector used for connecting adjacent short sections, a balance part used for keeping balance of internal and external pressure, a driving part used for providing power, a lead screw part used for converting rotating power into linear motion, a pushing part used for outputting pushing force and a measuring part used for synchronously opening and closing measuring arms according to the magnitude of the pushing force, the upper connector comprises an upper connector shell, and a multi-core plug and a board clamping frame for installing a circuit board are installed in the upper connector shell. According to the utility model, the circuit control part is separated from the controlled motor part, so that the space occupied by the driving part is reduced, and the radial arrangement is reduced by connecting all parts step by step, so that the diameter of the whole caliper is reduced, and finally, the purpose of measuring the small-diameter hole diameter of 3.6 inches is achieved.

The invention discloses a multi-dielectric-layer pressure-resistant composite material and application of the multi-dielectric-layer pressure-resistant composite material in an antenna housing. The multi-dielectric-layer pressure-resistant composite material has a light high-strength structure and also has high wave-transparent performance. The multi-dielectric-layer pressure-resistant composite material specifically comprises a plurality of high-structural-strength surface layers and supporting core layers which are arranged in sequence, and the high-structural-strength surface layers are located on the outermost layer. The high-structural-strength surface layer is made of a fiber-reinforced resin-based composite material, and the supporting core layer is made of a low-density pressure-resistant composite material. Compared with the prior art, the multi-dielectric-layer pressure-resistant composite material provided by the invention has the following progress: the multi-dielectric-layer pressure-resistant composite material is low in dielectric constant, pressure-resistant and high in wave-transparent performance, can meet the index requirement that the insertion loss is less than 1.5 dB, and can also meet the pressure requirement of external pressure. And multi-frequency-band design can be carried out for different wave-transparent and pressure-bearing requirements.

The present disclosure relates to a pressure equalization device for a housing, having a base body with an inner surface and an outer surface, which is configured at least partially as a hollow cylinder, wherein the base body comprises, at its first base surface, a gas passage opening on the housing side, and at its lateral surface, at least one gas pressure relief opening, and a housing seal arranged on the outer surface of the base body in a circumferential direction and comprising a first sealing region and a second sealing region. The first sealing region of the housing seal, in a state in which the pressure equalization device is mounted in the housing, is in contact with the housing and the lateral surface of the housing and seals the housing with respect to the pressure equalization device. The second sealing region completely covers the gas pressure relief opening, and when a pressure difference between the internal pressure on the inner surface of the base body and the external pressure on the outer surface of the base body exceeds a threshold value, is elastically deformable outward in the radial direction and thereby providing a flow-conducting connection between the inner surface and outer surfaces through the gas pressure relief opening.

The invention discloses a plate bending machine for stainless steel plate machining, and relates to the technical field of plate bending. According to the plate bending machine for stainless steel plate machining, through the design of the bending device, a plate is placed on the bending table, a hydraulic column drives a buffering mechanism to extrude an auxiliary rod, the auxiliary rod drives a bending block to extrude towards one side of a bearing mechanism, and therefore the effect of bending the plate is achieved; the buffering mechanism plays a role in damping and buffering, so that the extrusion force is reduced, excessive extrusion of parts is avoided, instantaneous impact is buffered, the bearing mechanism plays a role in buffering in the pressing and shrinking process, impact of external pressure on the parts is reduced, and the service life of the parts is prolonged. And one side of the protection table is scoured through the pneumatic device, so that the effect of cleaning impurities on the surfaces of the parts is achieved.

The present invention discloses a hollow shell PDMS flexible pressure sensing device with an embedded planar inductive coil, comprising: a flexible backing, a hollow shell porous PDMS support body, and a mounting frame; the hollow shell porous PDMS support body is fixed to the upper limit of the flexible backing; a PI film that matches the flexible backing is adhered to the top of the hollow shell porous PDMS support body; and the outer sides of the flexible backing and the PI film are wrapped with radiation-proof cloth. The present invention realizes the operation of rapid and automatic resetting of the support body and continuous pressure detection. When pressure gradually acts on the top of the porous PDMS support body, the entire sponge body is gradually compressed, so that the relative distance between the coils inside it gradually decreases, and the inductance value of the entire circuit increases accordingly. When the external pressure is gradually removed, the entire hollow shell porous PDMS support body gradually returns to its original shape under the action of elasticity. The present invention can achieve an ideal height, improve flexibility, and have good anti-interference ability, making the detection process more accurate and practical.

This invention relates to the field of composite pipe technology and discloses a coilable pipe. The pipe includes a core tube (20) with a uniform cross-section medium flow channel and a corrugated protective layer (10) sleeved on the outside of the core tube (20). The outer surface of the core tube (20) is fitted with the minimum inner diameter of the corrugated protective layer (10). The corrugated protective layer (10) includes at least a metal corrugated protective layer (11), an anti-corrosion layer (12), and a plastic outer protective layer (13) arranged from the inside out. Through the above technical solution, this invention improves the rigidity of the pipe by setting a corrugated protective layer on the outside of the core tube, increasing the pipe's axial tensile strength and resistance to external pressure, ensuring the roundness of the core tube, and preventing damage to the core tube during coiling, uncoiling, and laying. Furthermore, the corrugated protective layer in this invention provides a plastic outer protective layer on the outside of the metal corrugated protective layer and the anti-corrosion layer, further protecting the anti-corrosion layer and the metal corrugated outer protective layer.

The present invention discloses a construction scaffold, comprising: a frame system; a guiding and unloading system, which includes a pair of guide rails spaced on the side of the frame system against the wall, and attachment supports are provided between the pair of guide rails and the floor slabs of other floors except the corresponding lowest floor; an anti-falling system, which includes a base detachably connected to the lowermost guide wheel, a first support plate supported on the base by a cylinder, a second support plate elastically provided on the first support plate, and an airbag covered with the second support plate as the bottom, wherein at least one one-way valve communicating with the airbag is provided on the second support plate, and when there is no external pressure, the one-way valve is closed; a lifting system, which is provided between the frame system and the floor slab of one of the floors and is used to lift the frame system. A construction method of a construction scaffold. The present invention has the beneficial effect of preventing falling while solving the problem of inconvenient height adjustment.

The utility model relates to the technical field of inspection wells, and discloses an assembly type composite material inspection well which comprises an upper well body and a lower well body, a water inlet hole and a plurality of water outlet holes are formed in the side wall of the upper well body, and a second sealing ring and a first sealing ring are installed in each water outlet hole and each water inlet hole respectively. A water inlet pipe and a water outlet pipe are installed in the first sealing ring and the second sealing ring respectively, an upper well body is installed on the lower well body, a well lid is installed on the upper well body, a clamping groove is formed in the well lid, a sealing rubber ring is installed in the clamping groove, and the sealing rubber ring is installed between the upper well body and the well lid. Modular design and a multi-sealing structure are adopted, the structural strength is enhanced through flange connection and arrangement of the reinforcing ribs and the triangular supports, external pressure can be resisted, deformation can be prevented, all-directional sealing is achieved through combination of multiple sealing rings and sealant, it is guaranteed that the water meter is accurate in metering and equipment is safe, the construction period is greatly shortened through prefabrication and assembly construction, and the construction cost is reduced. The environmental influence is reduced and the equipment is convenient to overhaul and maintain.

The utility model relates to a bottom air suction chamber for a coating production line. The bottom air suction chamber comprises a shell, a high-pressure box fixed at the upper end of the shell, a vortex plate mounted in the high-pressure box, a filter box mounted at the lower end of the vortex plate, an air inlet pipe fixed at the lower end of the high-pressure box and an exhaust mechanism fixed on the side surface of the air inlet pipe, vortex can be generated at the air inlet through the specially designed vortex plate, the pressure intensity is reduced, and the entrainment effect is enhanced. Meanwhile, the air suction chamber is matched with the high-pressure box, the high-pressure box can eject high-pressure jet flow, surrounding fluid can be continuously drawn into the jet flow under the entrainment action of the jet flow, and as the internal pressure of the jet flow is smaller than the external pressure, air tends to move inwards at the top end of the jet flow and at the position where air energy is insufficient, and is sucked into the air suction chamber; by means of the design, air flow on the surface of the vortex plate can be accelerated, coating attached to the surface of the vortex plate is reduced, and meanwhile the air suction efficiency of the device can be greatly improved.

A fluid mixing device comprises a liquid inlet part, a liquid outlet part and a stirring part arranged on a pipeline between the liquid inlet part and the liquid outlet part. The stirring part comprises a first mixing part, a second mixing part arranged above the first mixing part and a communicating part. Adjusting devices are arranged in the first mixing part and the second mixing part in the length direction of the first mixing part and the second mixing part respectively, and liquid in the first mixing part flows to the second mixing part along the communicating part under the action of external pressure, is mixed again in the second mixing part and then is discharged through the liquid outlet part. According to the fluid mixing device disclosed by the invention, the stirring part with the first mixing part and the second mixing part is used for stirring liquid in a grading manner, and meanwhile, the second mixing part is arranged above the first mixing part, so that a vertical mixing room device is formed, the liquid can be fully mixed in the stirring part, and the occupied area of equipment is reduced.