247 results about "Head (vessel)" patented technology

The invention discloses a pressure vessel welding seam nondestructive rapid detection device, which comprises a displacement mechanism and a to-be-detected mechanism, the to-be-detected mechanism comprises supporting frames, a pressure vessel main body is placed at the upper top ends of the two supporting frames, and accessories are welded and formed at the two ends of the pressure vessel main body. The lifting frame rotates to drive the two sets of knocking mechanisms to move up and down, the reset spring is compressed in the process, the two sets of knocking mechanisms move in a staggered mode, the welding position inside the pressure container body and the accessory is impacted, and the welding position is detected through the laser detection head. When the pressure vessel is impacted, whether the pressure vessel is damaged or not after being impacted is checked, if the pressure vessel is damaged, the marking pen can achieve fine adjustment of arc-shaped movement with the help of the marking mechanism so as to make contact with the inner wall of the pressure vessel body, and due to rotation of equipment, marking treatment is conducted on the damaged position, and follow-up treatment is facilitated for workers.

The invention discloses an end socket manufacturing tool, and relates to the technical field of end socket manufacturing, and the end socket manufacturing tool comprises a plurality of first supporting pieces; the supporting platform is arranged above the multiple first supporting pieces; the adjusting device comprises a plurality of adjusting assemblies, the adjusting assemblies are arranged above the supporting platform and used for supporting melon petal assemblies forming the end socket, the multiple adjusting assemblies are mutually independent, and the height of each adjusting assembly is adjustable; and the center positioning piece is arranged above the supporting platform so as to abut against the radial inner end of the scalloped segment assembly, and the center positioning piece is in a continuously-extending ring shape. According to the manufacturing tool of the end socket, the parameters of the first supporting piece, the supporting platform, the adjusting assembly and the center positioning piece are adjusted, so that the manufacturing tool can adapt to the end sockets of different sizes and different shapes, the manufacturing tool can be used for manufacturing the large end socket, and the manufacturing precision of the large end socket is improved; and the strict requirement of the nuclear fusion device on the precision of the pressure vessel is met.

The utility model provides a pressure relief device of a pressure vessel, which relates to the technical field of pressure vessels and comprises a shell and a cooling box, cooling liquid is arranged in the cooling box, the outer surface of the shell is fixedly communicated with an air outlet hard pipe, one end of the air outlet hard pipe far away from the shell penetrates through the cooling box, and a first pressure relief valve is arranged on the air outlet hard pipe. According to the utility model, gas in the pressure container sequentially passes through the gas outlet hard pipes and enters the shell, and meanwhile, cooling liquid in the cooling box can cool the gas in the gas outlet hard pipes, so that the damage of high-temperature gas to the device is avoided, and meanwhile, the gas entering the shell is primarily filtered and purified by the filter plate; then, by starting a circulating water pump, the absorption liquid in the shell is pumped out by a liquid pumping hard pipe, is conveyed into a flow guide hard pipe through a conveying hard pipe and is sprayed through a spray head, so that the gas entering the shell is in contact with the absorption liquid, the absorption liquid absorbs harmful gas in the gas, and absorption treatment of the gas is facilitated.

A system for a hyperbaric chamber with mirrored controls is disclosed. The system includes a cylindrical vessel with a mid-portion, head portion, and door portion that create an inner cavity when a door is in a closed position. The vessel is designed to maintain a pressure of at least 3 atmospheres and includes a plurality of mirrored windows for external visibility. Control panels with a housing and multiple controls are attachable to mirrored control inlets on the vessel's wall. The mirrored control inlets allow for control panels to be placed on either the interior or exterior surfaces of the vessel. The system may also include a modular design with sections secured together using flanges and gaskets to create an airtight seal. The hyperbaric chamber's mirrored controls and modular construction enhance accessibility, safety, and patient comfort, addressing space constraints and orientation limitations of current designs.

A pipeline plug includes a plug body. The plug body includes an outer housing. The interior of the outer housing defines a pressure vessel. The pipeline plug includes a pressure head coupled to the plug body, a seal assembly, a gripper assembly, a movable head, and an actuation mechanism. The actuation mechanism includes a leadscrew, the leadscrew coupled to the movable head. The actuation mechanism includes a captive nut, the captive nut positioned within the pressure vessel. The actuation mechanism includes a motor, the motor operatively coupled to the captive nut and adapted to rotate the captive nut.

The invention relates to the technical field of composite material pressure vessel forming, and discloses a composite material pressure vessel inner container with reinforcing ribs, which comprises a cylinder body, sealing heads are arranged on the two sides of the cylinder body, the cylinder body section is provided with a plurality of cylinder body reinforcing ribs which are arranged at equal intervals along the axial direction of the cylinder body; the invention further discloses a manufacturing method of the composite material pressure container inner container with the reinforcing ribs, and the manufacturing method comprises the following steps that S1, segmented molds are designed and manufactured, and the molds comprise the inner mold and the outer mold; and S2, carbon fiber prepreg is laid on the surface of the inner mold to form a carbon fiber cylinder body section. The structural strength and uniformity of the inner container are optimized through design of reinforcing ribs and filling of a circumferential fiber winding reinforcing layer, the thickness of the reinforcing ribs is calculated based on the difference value between the minimum thickness and the thickness of the end socket, in winding forming, a co-curing process is adopted to be matched with a high-precision mold, an inner mold is fused into the inner container to provide support, and meanwhile, the thickness of the reinforcing ribs is reduced. And the interface strength is optimized through inner mold supporting and a laminated gradient structure.

The invention relates to the technical field of pressure test, and provides a plugging device for pressure vessel pressure test, which comprises a mechanical arm arranged on one side of a test station, and a grabbing mechanism is arranged at the moving end of the mechanical arm; the plugging assembly comprises a sealing plate and a clamping assembly arranged on the sealing plate, the clamping assembly comprises a clamping head movably arranged in the circumferential direction of the sealing plate, and after the grabbing mechanism grabs the sealing plate and gets close to the pipe opening of the pressure container, the clamping head can be matched with the sealing plate to clamp a pipe opening flange of the pressure container so as to seal the pipe opening of the pressure container. According to the plugging device for the pressure vessel pressure resistance test, the grabbing mechanism is arranged on the lower end face of the movable end to cooperate with the plugging assembly to act, rapid plugging of the pipe opening is achieved, and the technical problem that in the prior art, when the pressure vessel is subjected to the pressure resistance test, the installation efficiency of a blind plate is low is solved.

The invention discloses a pressure vessel welding seam nondestructive testing device, and relates to the technical field of pressure vessel detection. The device comprises a base, an arc-shaped groove used for bearing a spherical container is formed in the center of the base, a first movable plate is arranged on the base through an annular moving mechanism, the annular moving mechanism drives the first movable plate to rotate around the circle center of the spherical container, and an arc-shaped plate matched with the curvature of the outer wall of the spherical container is arranged on the first movable plate; a second movable plate is arranged on the arc-shaped plate through an arc moving mechanism; the spherical container is placed in the arc-shaped groove in the base, the annular moving mechanism drives the first movable plate to rotate, the arc moving mechanism drives the second movable plate to move in an arc-shaped mode, the annular moving and the arc moving can enable the detection head to move on the surface of the spherical container at two degrees of freedom, it is ensured that the detection head can cover all types of welding seams, and meanwhile the detection efficiency is improved. Oxide skin on the welding seam is cleaned and removed through the cleaning mechanism, so that the lift-off distance between the detection head and the container is prevented from being influenced by the oxide skin.

The invention relates to the technical field of pressure vessel manufacturing, and discloses a gas storage tank automatic welding and grinding integrated device which comprises a bottom frame, the top of the bottom frame is fixedly connected with a supporting seat for supporting a gas storage tank body, and the bottom of the supporting seat is provided with a limiting assembly for positioning the placing position of the gas storage tank body. The two ends of the bottom frame are each provided with a side clamping assembly used for installing the gas storage tank sealing cover and assisting in rotary welding and grinding. According to the welding device, the gas storage tank body and the two gas storage tank sealing covers can be precisely in butt joint through the side clamping assembly, and the butt joint positions of the gas storage tank body and the two gas storage tank sealing covers can be welded at the same time through cooperative use of the welding assembly and the grinding assembly; and welding scars generated after welding are effectively and rapidly polished, and avoiding of the welding gun and the polishing head during butt joint of the gas storage tank sealing cover and the gas storage tank body is achieved through the translation mechanism.

The invention provides a reverse osmosis pressure vessel end cover dismounting device, and relates to the technical field of water treatment equipment.The reverse osmosis pressure vessel end cover dismounting device comprises a supporting plate and a pull rod, a through hole is formed in the middle of the interior of the supporting plate, the pull rod movably penetrates through the through hole, a thread head is arranged at the lower end of the pull rod, and a first thread is arranged on the outer side of the thread head; a second thread is arranged on the outer side of the pull rod, a nut is mounted on the outer side of the pull rod through the second thread, and a gasket is movably arranged on the outer side of the pull rod below the nut; according to the structure of the end cover, the screw head with the first thread is in threaded connection with the central groove of the end cover, the supporting plate is limited on the opening of the pressure container, the handle is rotated to drive the nut to rotate, and the thread drives the pull rod to move upwards through the matching effect of the nut and the second thread of the pull rod; the whole process is labor-saving and efficient, the operation is convenient, and the end cover is not damaged.

The utility model belongs to the technical field of hydrofoils, and particularly relates to a ship with a telescopic elevator structure, which comprises a ship body, a bow, a stern, a buoyancy structure, a first arc-shaped strut and a second arc-shaped strut. The buoyant structure includes a first buoyant volume disposed near the bow and a second buoyant volume located between the first buoyant volume and the stern. The present application provides a vessel with a retractable elevator structure, a first buoyancy volume pivotably coupled to a second buoyancy volume along a radial axis to achieve precise directional control, first and second arcuate struts having proximal ends movably connected to the buoyancy structure and distal ends supporting a hydrofoil lift surface, the first arcuate strut and the second arcuate strut expand and contract in an arcuate manner along an external common radial axis, allowing seamless transition between a compact storage configuration and an expanded operating state, improving ship maneuverability, portability and safety.

The invention relates to a pressure vessel outer wall welding device, and relates to the technical field of pressure vessel welding, the pressure vessel outer wall welding device comprises a driving assembly, a welding platform, an automatic welding device and a plurality of centering assemblies, the driving assembly comprises a driving motor, a rotating rod and a supporting seat, and the supporting seat is fixedly connected to the upper end face of the welding platform; the driving motor is fixedly connected to the vertically-arranged end of the supporting seat, one end of the rotating rod horizontally penetrates through the supporting seat and is coaxially and fixedly connected with the driving motor, the centering assembly comprises a mounting seat and a plurality of arc-shaped plates, and the arc-shaped plates are evenly distributed in the circumferential direction of the rotating rod and are in sliding connection with the mounting seat in the radial direction of the rotating rod; the mounting base and the rotating rod are coaxially arranged and rotate synchronously, the automatic welding device comprises a welding head and a stand column, and the welding head is in sliding connection with the stand column in the vertical direction. The welding device has the effects that the centering and positioning precision and efficiency of the two cylinders during welding are improved, and the welding quality and efficiency are improved.

The utility model discloses a pressure vessel end socket welding device which comprises a scalloped segment end socket welding and lowering mechanism, the scalloped segment end socket welding and lowering mechanism comprises a vertical stand column, and a scalloped segment end socket lifting and supporting assembly is fixedly assembled and connected to the top of the vertical stand column. The scalloped segment end socket is suspended and placed on the scalloped segment end socket lifting and supporting assembly; an umbrella-shaped lowering structure is fixedly installed at the upper end of the vertical stand column and comprises a plurality of horizontal rods horizontally and fixedly connected to the vertical stand column, and the outer ends of the horizontal rods are connected with supporting wheels supported on the inner side wall of the scalloped segment sealing head in a hinged mode. The riding wheel comprises a hinged supporting arm hinged to the horizontal rod and a supporting riding wheel rotationally connected to the top of the hinged supporting arm. The umbrella-shaped lowering structure further comprises a traction assembly used for driving the hinged supporting arm to rotate and retract. According to the mode, the defect that in the welding process of the scalloped segment end socket of a curved structure, the scalloped segment end socket is difficult to be put down to be aligned to a welding seam in a suspension mode is greatly overcome.

The invention discloses pressure vessel forge piece forging machining equipment with an impurity removing function, and relates to the technical field of forging equipment, the pressure vessel forge piece forging machining equipment comprises a forging table and a forging head installed on the inner side of the forging table, a supporting seat is fixedly connected to the top of the inner side of the forging table, and a round workpiece is placed on the top of the supporting seat; and the supporting mechanism is positioned at the top of the supporting seat. Through cooperation of parts such as the driving motor, the periphery of a circular workpiece is scraped, oxide skin, burrs, flashes and other impurities generated in the forging process are effectively removed, if the impurities are not removed, workpiece surface defects are possibly caused, the follow-up machining precision is affected or the stress concentration problem is caused, through continuous scraping of the arc-shaped pressing plate, the workpiece surface defects are effectively removed, and the workpiece surface defects are effectively removed. And the roughness of the periphery of the workpiece can be improved, so that the surface of the workpiece is smoother, the workload of subsequent machining (such as turning and grinding) is reduced, and the material loss and the machining cost are reduced.

The invention relates to the technical field of welding devices, and discloses a tower type pressure vessel welding device which comprises a welding machine body, a mounting rod is fixedly connected to one side of the welding machine body, a rotating sleeve is rotatably connected to the end, away from the welding machine body, of the mounting rod, and a rotating motor is fixedly connected to the top of the end, away from the welding machine body, of the mounting rod. A gear is fixedly connected to the output end of the rotating motor, a plurality of tooth blocks meshed with the gear are fixedly connected to the outer wall of the rotating sleeve, an inner side welding gun head is fixedly connected to the bottom of the rotating sleeve, a positioning assembly is connected to the end, away from the mounting rod, of the rotating sleeve, and an outer side frame is fixedly connected to the top of the mounting rod. According to the tower type pressure container welding device, when a circular seam is welded, welding can be conducted by rotating the inner side welding gun head and the outer side welding gun head, so that the hidden double risks of structural stability and personnel safety in the workpiece rotating process can be avoided, and the safety in the welding process is higher.

The invention relates to the technical field of hydrogen storage high-pressure containers, and discloses a manufacturing method of a regenerated carbon fiber reinforced lining, which comprises the following steps: S1, manufacturing a pressure container inner container seal head according to a seal head mold, manufacturing by adopting an injection molding process, embedding a metal bottleneck valve seat into the seal head mold, and controlling the temperature of an injection molding material to be 200-300 DEG C and the temperature of the mold to be 70-80 DEG C; the invention further discloses a composite material pressure container with the regenerated carbon fiber reinforced lining, the composite material pressure container comprises the recoverable lining, the recoverable lining comprises an end socket and a cylinder body, and the end socket and the cylinder body are connected into a whole through welding; and the two metal bottleneck valve seats are respectively connected with the sealing heads at the two ends of the recyclable lining and are used for connecting an external pipeline of the pressure container. By recycling nylon 6 or nylon 66 and carbon fiber prepreg to manufacture the cylinder body and combining reelpipe forming and optimized carbon fiber winding design, the strength and the pressure bearing capacity of the inner container are improved, material use is reduced, and the problem of mass increase caused by a high-density metal reinforcing piece is solved through a light-weight structure.

A modular hyperbaric chamber system with a reversible control section is disclosed, providing enhanced flexibility in chamber placement and orientation within various spatial constraints. The system includes a modular cylindrical vessel composed of a cylindrical body section, a head section, and a door section, with the body section featuring a reversible control section. This reversible control section, equipped with mirrored control inlets and windows, allows for 180-degree rotation, altering the chamber's orientation. The chamber maintains an internal pressure of at least 3 atmospheres and includes a flow control system for oxygen transfer from an external source into the chamber. A control panel with a housing and multiple controls is operably connected to the flow control system and can be secured to either the interior or exterior mirrored control inlets. The system's design accommodates custom configurations and ensures patient and operator convenience and safety.

The invention provides an integrated reactor pressure vessel and a refueling method, the pressure vessel comprises a cylinder and a bottom seal head arranged at the bottom of the cylinder, and the bottom seal head and the cylinder are detachably connected through a flange; at least one supporting boss is arranged in the bottom sealing head, the supporting boss is used for supporting a reactor core supporting plate and a reactor core shroud mounted on the reactor core supporting plate, and the fuel assembly is arranged in the reactor core shroud; in the refueling and refueling period, the bottom sealing head, the reactor core supporting plate, the reactor core shroud and the fuel assembly are transferred to a refueling pool together for fuel disassembly operation by disassembling the bottom sealing head. According to the pressure vessel, the bottom sealing head is detachably arranged at the bottom of the barrel, refueling is carried out from the bottom of the barrel, and the bottom sealing head, the reactor core supporting plate and the fuel assembly are transferred to the refueling pool together for centralized refueling during refueling, so that the refueling period is shortened, and due to refueling at the bottom of the barrel, the refueling efficiency is improved. Therefore, the problems that a traditional reactor top penetrating piece is difficult and tedious to disassemble and assemble, and long-distance deep reactor core reloading is difficult are solved.

The utility model discloses a kind of sealing structure for small reactor direct current steam generator, it is related to pressure vessel sealing technical field, solve the problem that small reactor direct current steam generator sealing structure is prone to sealing failure, leakage and maintenance difficulty.This utility model includes head, water inlet pipe and tube sheet, head is sleeved on water inlet pipe and is connected with tube sheet;Water inlet pipe one end is provided with recess structure, sealing groove one is set on tube sheet, recess structure is inserted into sealing groove one, sealing ring is set between recess structure and sealing groove one;Recess structure is right trapezoidal groove, sealing ring is D type sealing ring, the inclined inner wall of recess structure and the bevel of sealing ring contact.The utility model is decomposed into vertical direction force and horizontal direction force by the special-shaped sealing ring structure and recess structure set, when displacement or rebound occurs in water inlet pipe, still can guarantee sealing effect.

The invention discloses a thickness prediction method and system for winding a composite material pressure vessel end socket, and belongs to the technical field of simulation modeling. The method comprises the steps that the surface of a core mold of the oval end socket of the composite material pressure container serves as a galloon winding face of a first winding layer, and the first winding layer serves as a current winding layer; determining a left boundary and a right boundary of the galloon; determining second scatter points corresponding to the first scatter points on the galloon winding surface by utilizing the left boundary and the right boundary of the galloon so as to form a new galloon winding surface; judging whether the current winding layer is the last winding layer or not, and if yes, ending; and if not, taking the new galloon winding surface as the galloon winding surface of the next winding layer of the current winding layer, taking the next winding layer as the current winding layer, and returning to the step S2. According to the method, the thickness characteristics of the end socket of the wound composite material pressure vessel can be reflected more accurately during simulation modeling, and more refined modeling of the pressure vessel is realized.

The present invention is characterized by comprising: a liner (2) that is provided with a cylindrical trunk section (21), a head section (23) in which a mouthpiece (3) is disposed, and a shoulder section (22) that is provided between the trunk section (21) and the head section (23) and decreases in diameter toward the head section (23); and a reinforcing layer (4) that is formed on the outer peripheral surface of the liner (2) by winding fibers impregnated with a resin, wherein a groove section (25) is formed in at least one among a first boundary section (24) serving as a boundary between the head section (23) and the shoulder section (22) and a second boundary section (26) serving as a boundary between the trunk section (21) and the shoulder section (22), and resin that has seeped out from the reinforcing layer (4) has entered the groove section (25).

The present application provides a kind of inside flanging forming device of jacket through hole, belong to pressure vessel processing technical field.It solves the problem of existing technology when processing jacket through hole inside flanging, processing is troublesome, the problem of insufficient forming quality.The inside flanging forming device of jacket through hole, including cylinder body, forming die head and vertically arranged pull rod, forming die head is conical frustum and has the guide hole one along its axis through, the large end of forming die head is downward and fixedly connected in the upper end of cylinder body, the lower end of pull rod is slidably connected in cylinder body and pull rod can be relatively cylinder body axial telescopic under the action of hydraulic drive, pull rod is up and out of forming die head through the guide hole one, the upper end of pull rod can be detachably sleeved with the push seat that can be synchronous with pull rod and move down, the bottom of this push seat has the push part of circular tube shape and is concentrically arranged with forming die head.The present application makes jacket through hole can be smoothly and smoothly completed flanging forming, effectively guarantees the forming precision and forming quality of inside flanging.

The utility model relates to the technical field of pressure vessel safety, in particular to a pressure vessel safety protection device which comprises a device body, the device body is composed of a valve seat, a valve body, a valve rod, a rod sealing head, a reset spring and a pull ring, the valve seat is provided with a valve cavity and a clamping sealing ring groove, the valve seat is provided with a first inner screw groove and an embedded sealing pad, the valve body is provided with an embedded groove and an outer thread, and the valve body is provided with a second inner screw groove and an embedded sealing pad. A sealing convex ring is arranged on the valve body, the reset spring is arranged on the valve rod in a sleeving mode, a sealing ring and a stud are arranged on the rod sealing head, and a second inner spiral groove and a ring hook hole are formed in the valve rod. The detachable valve body is arranged on the valve seat, the valve rod structure with the detachable rod end socket is arranged, and meanwhile, the annular hook hole structure is arranged on the valve rod, so that the valve rod, the rod end socket, the pull ring and the reset spring can be independently and conveniently detached and replaced; and the good sealing performance of the device body can be kept under extreme temperature and pressure conditions as a whole.

The invention belongs to the technical field of seal head tailor-welding devices, and discloses a pressure vessel large curved surface seal head tailor-welding device and tailor-welding method.The pressure vessel large curved surface seal head tailor-welding device comprises a tailor-welding box body, a rotating structure and a welding structure are arranged in the tailor-welding box body, and arc-shaped petals are installed in the tailor-welding box body through fixing assemblies; the fixing assembly comprises a base fixedly installed in the tailor-welded box body, moving seats are arranged at the top end of the base and evenly distributed in an annular array mode, and a first fixing plate and a second fixing plate are installed at the top end of each moving seat. And after each arc-shaped petal is placed, the second fixing plates are made to get close to one side of the first fixing plate so as to fix the arc-shaped petals, the arc-shaped petals are fixed through synchronous movement of the multiple second fixing plates, the fixing efficiency is improved, and the curved surface seal head tailor-welding efficiency is indirectly improved.

Hub and spoke lateral assemblies and related methods of use that increase media utilization within filtration tanks and vessels. The hub and spoke lateral assemblies include one or more features that allow for flow arms to reside in close proximity to and substantially conform with an inner surface of a vessel, such as a vessel head or vessel floor so as to eliminate or reduce a gap between the flow arms and the vessel head or vessel floor and maximize the utilized media volume. The hub and spoke lateral assemblies can be utilized for both up flow and down flow conditions as well as with compressible (gas) and incompressible (liquid) fluid flows.

The utility model discloses a kind of rotary pressure vessel welding devices, belong to pressure vessel welding technical field.A kind of rotary pressure vessel welding device, including hoist frame, the lower end of truss frame is provided with laser welding machine, welding tool is installed below laser welding machine, the upper end of welding tool is installed with two adjusting frame, the rear end of laser welding machine is installed with electric cylinder.The utility model solves the problem that the existing pressure vessel welding device is affected by the size of pressure vessel, poor adaptability, affects the welding effect, the utility model is fixed laser welding machine in hoist frame lower end, carries out welding work to pressure vessel to be processed with laser welding machine, adapts to different working environment, by installing electric cylinder between truss frame and laser welding machine, electric cylinder telescopic, the angle of laser welding machine lower end welding head welding is adjusted work, simple structure, convenient operation, collocation welding tool realizes quick adjustment and adaptive work.

The utility model discloses an auxiliary grinding tool for a composite material pressure container lining for a winding machine, which comprises a fixed seat, a support frame, a U-shaped bracket, a connecting plate, a winding machine switching disc, a pulling plate and a rotating wheel, the fixed seat is composed of baffles on two sides and a base, and the fixed seat is fixedly connected with a threaded hole in the head of an angle grinder and the support frame respectively; rotating wheels are fixedly mounted on the two sides of the bottom of the fixed seat respectively, and the rotating wheels on the two sides are connected with the U-shaped bracket through rotating screws respectively to form a rotating mechanism; the two U-shaped brackets are fixedly installed on the end face of the connecting ring. The connecting plate and the pulling plate are fixedly installed on the two sides of the winding machine switching disc, and the winding machine switching disc is fixedly connected with the winding machine. The angle grinder solves the problems that the efficiency is low, the labor intensity is high, the working environment is severe, and the uniformity of grinding machining is difficult to guarantee when an angle grinder is manually held by hand for grinding, and is simple in structure, light in weight, easy to machine, low in manufacturing and maintenance cost, convenient to operate and good in using effect.

The invention provides a pressure vessel. The pressure vessel comprises a bushing and a composite material. The bush includes: a cylinder portion constituting a central region of an outer surface of the bush; and a head portion constituting a peripheral region of an outer surface of the bush and connected to both opposite ends of the cylindrical portion in the length direction, in which an imaginary straight line passing through a center of the bush and extending in the length direction is defined as a reference straight line. The composite material includes: a plurality of bands surrounding an outer surface of the liner; and a first composite material region in which the plurality of tape groups, which form around the head portion and in which only a portion of the tape groups overlap each other, are stacked in the lengthwise direction, in which the first composite material region is rotationally symmetric with respect to the reference straight line.

The utility model discloses a bubble generating device for an air lubrication resistance reduction ship, and belongs to the technical field of ship resistance reduction. The device comprises a main air cavity, a side air cavity and an exhaust chamber which are arranged on a bottom plate, the main air cavity is formed in the bottom plate, the top of the main air cavity communicates with external air supply equipment through an air inlet, side air cavities are symmetrically formed in the left side and the right side of the main air cavity correspondingly, and the main air cavity communicates with the side air cavities through internal communicating holes. The exhaust chamber is an open cavity positioned below the main air cavity and can be in direct contact with water flow; the head end of the exhaust chamber is communicated with the main air cavity through an upper air vent, and the two sides of the exhaust chamber are communicated with the two side air cavities through side air vents respectively. A gas storage cover plate is arranged at the bottom of the head end of the exhaust chamber. The side face of the ventilation generating device is provided with the side air cavity, after ventilation, the main air cavity penetrates out of the continuous air layer from the upper ventilation opening, the side air cavity can evenly generate stable bubbles which serve as supplementary bubbles of the continuous air layer penetrating out of the upper ventilation opening, and the air layer is more even.