198 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.

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 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 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 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 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.

The invention discloses pressure vessel end socket conveying equipment, and relates to the technical field of conveying equipment, the pressure vessel end socket conveying equipment comprises a conveying mechanism, and the conveying mechanism comprises a feeding conveying part, a bending conveying part and a discharging conveying part which are integrally arranged; a rail mechanism is fixedly arranged on the outer side of the conveying mechanism, a plurality of first buffering mechanisms are arranged at the positions, corresponding to the conveying mechanism, of the rail mechanism, and a plurality of second buffering mechanisms are fixedly arranged at the positions, corresponding to the bent conveying part, of the rail mechanism. The first buffer mechanism is arranged corresponding to the flange part of the sealing head body, and the second buffer mechanism is arranged corresponding to the sealing cover part of the sealing head body; the upper end of the conveying mechanism is provided with an inner buffering mechanism placed in the end socket body. When the end socket body passes through the bent conveying part, the first buffer mechanism and the second buffer mechanism are matched with the inner buffer mechanism to support the end socket body; the problem of rail hanging or derail caused by gravity center shift of the end socket is effectively prevented, and the conveying stability and safety are improved.

The utility model relates to the field of sealing performance detection equipment, in particular to pressure vessel sealing head sealing performance detection equipment, which comprises a detection box, a sealing plate, an air cylinder, a pressing plate, a control module, an air pump and a water pump, according to the utility model, the three groups of cylinders are connected with the pressure sensors to respectively detect the three groups of end sockets, so that the detection period is effectively shortened, the requirements of mass production are met, the equipment can process more end sockets within a fixed time, the idle time of the equipment is reduced, and the overall detection efficiency is improved; the three groups of detection modes can provide multiple detection modes for a user to select, detection parameters are flexibly set according to specific requirements of the seal heads, the detection modes of different seal heads are met, meanwhile, the three groups of air cylinders independently operate and do not interfere with one another, when a single air cylinder goes wrong, detection of other stations cannot be affected, the downtime is shortened, and the working efficiency is improved. And stable operation of equipment is ensured.

The utility model relates to the technical field of seal head machining, in particular to a seal head cutting device of a pressure vessel, which comprises a machining table, a clamping mechanism, a supporting seat, a moving mechanism, a connecting plate, a cutting machine, a scrap suction nozzle and a conveying mechanism, the clamping mechanism is used for clamping and fixing a seal head, and the supporting seat is arranged on the machining table. The moving mechanism is used for transversely or vertically moving the connecting plate, the connecting plate is located below the moving mechanism, the cutting machine and the scrap suction nozzle are both arranged below the connecting plate, the conveying mechanism is used for sucking waste scraps generated in the end socket cutting process out through the scrap suction nozzle and collecting and treating the waste scraps in a unified mode, and the waste scraps generated in the cutting process are sucked into the scrap suction nozzle through the conveying mechanism. And the scraps are conveyed into an external dust collection box through the scrap suction nozzle to be uniformly collected and treated, so that the situations that the scraps generated in the cutting process are directly dispersed into the air, and the fine scraps are sucked into the body of a worker to affect the body health of the worker can be avoided.

The present invention belongs to the field of head seals, and specifically relates to a mobile pressure vessel tank head seal protection device, comprising a wear-resistant elastic layer, a toughening layer, and a foaming layer, wherein the foaming layer is located between two toughening layers; each toughening layer is connected to a wear-resistant elastic layer on the side facing away from the foaming layer, and the outer wall of the wear-resistant elastic layer is in contact with the outer wall of the head seal; and further comprises a pair of permanent magnets located within the foaming layer, the two permanent magnets being placed facing each other and having the same poles facing each other. The present invention sets a head seal of the tank body, comprising a plurality of protective layers that cooperate with each other, and the strength, elasticity, and buffering and shock-absorbing properties of the various materials used in the various protective layers are closely combined, thereby improving the head seal of the tank body and other pressure vessels from resisting collision and impact during transportation, increasing the safety of the tank body and other pressure vessels during transportation, and reducing potential risks and losses during transportation.

The utility model discloses a veneer reeling machine for pressure vessel production, which comprises a veneer reeling machine main body, the veneer reeling machine main body comprises a working table, an adjusting device and a compression roller are arranged on the working table, a supporting seat is hinged on the working table, a supporting screw rod and a supporting block are arranged on the supporting seat, a supporting groove is arranged on the supporting block, a sliding rail and a sliding plate are arranged on one side of the working table, and the sliding plate is arranged on the other side of the working table. A correcting frame is arranged on the sliding plate, a correcting plate is rotationally arranged on the correcting frame, a first correcting rod and a second correcting rod are arranged at one end of the correcting plate, a hydraulic cylinder is arranged at the other end of the correcting plate, a supporting block and a supporting groove are arranged on the supporting seat, the pressing roller is conveniently supported, and the height of the pressing roller can be adjusted through a supporting screw and the supporting block in cooperation with an adjusting device; the pressing roller is conveniently supported, the stability of the pressing roller is improved, by means of the lever principle, the hydraulic cylinder drives the correcting plate to rotate around the correcting frame, and the correcting plate drives the first correcting rod and the second correcting rod to correct the two sides of the winding drum.

The utility model relates to a strength detection device for pressure vessel production, which comprises a workbench, the top of the workbench is provided with a protective cover, the protective cover is internally provided with a transmission assembly, the transmission assembly comprises a fixed machine body fixedly connected in the protective cover, the front side of the fixed machine body is provided with a display screen, and the front side of the fixed machine body is provided with a display screen. The top of the fixed machine body is fixedly connected with a hydraulic rod, the bottom of the hydraulic rod is fixedly connected with a moving block, and the bottom of the moving block is fixedly connected with a detection head. According to the strength detection device for pressure container production, a container is placed at the top of a baffle, a first electric push rod is started to drive a clamping plate to clamp the container, a hydraulic rod is started to drive a moving block and a detection head to move downwards, detection data are displayed through a display screen, and after detection is completed, the container is loosened; and a second electric push rod is started to drive a baffle to move leftwards, so that the container can be placed in the workbench, and the container can be temporarily stored.

A dual-cable-tray reactor head structure, comprising a hoisting assembly (30), an anti-seismic assembly (40), a first cable tray (10), and a second cable tray (20) which are arranged above a top cover (100) of a pressure vessel and located at the periphery of a control rod drive mechanism. The hoisting assembly (30) comprises a plurality of hoisting rods (31) and a support frame (32). The plurality of hoisting rods (31) are spaced part in the circumferential direction of the top cover (100) and are vertically connected to the top cover (100). The support frame (32) is connected to the tops of the plurality of hoisting rods (31). The anti-seismic assembly (40) is arranged above the top cover (100) and located below the support frame (32). The first cable tray (10) and the second cable tray (20) are symmetrically distributed on two sides of a reactor core, and are pivotably connected to the anti-seismic assembly (40). The dual-cable-tray reactor head structure can reduce the difficulty and time of center-of-gravity leveling in a hoisting stage during nuclear power plant installation and refueling outage, thereby improving hoisting efficiency and safety; said structure meets the segregation requirements for reactor head cables, thereby ensuring sufficient safety redundancy margin for the reactor head cables; and said structure enhances the convenience and economy of cable installation, maintenance, and replacement.

The invention provides an auxiliary connecting lock bottom structure of a pressure vessel annular welding opening cover, which is characterized in that a circle of lock bottom (2) is processed on a pressure vessel shell (1) in the circumferential direction, lock bottom connecting bosses (3) are processed on the lock bottom (2) at intervals, a circular process opening cover (4) is used for sealing and forming a process opening, and during annular welding, the process opening cover (4) is lapped on the lock bottom (2); the process opening cover (4) and the lock bottom connecting boss (3) are fixed through a countersunk bolt (7), a circumferential weld (5) is formed between the forming process opening and the process opening cover (4), and then a connecting welding spot (6) is formed on the upper portion of the countersunk bolt (7). The welding stress and the welding deformation of the long-welding-seam girth welding weldment are improved, the influence on the operation space of a process opening can be effectively reduced, the one-time welding qualification rate is increased, and the bearing capacity of a welding seam is improved.

A production method and simulated hot forming process for thick steel plates for high-temperature and high-pressure vessel heads. The chemical composition of the steel is as follows by weight: C=0.11%-0.13%, Si=0.05%-0.12%, Mn=1.40%-1.60%, P≤0.010%, S≤0.002%, Sn≤0.010%, Cr=0.20%-0.40%, Mo=0.20%-0.40%, Ni=0.60%-1.0%, Al=0.05%-0.08%, Nb=0.010%-0.030%, B=0.0010%-0.0020%, N=0.0040%-0.0060%, with the remainder being Fe and unavoidable impurity elements. The thickness of the steel plates is 75-145 mm, and key production process steps include smelting, heating, controlled rolling and controlled cooling, normalizing, and tempering. The key steps in the simulated hot forming process for steel plates include hot forming and simulated post-weld heat treatment. The thick steel plates for high-temperature and high-pressure vessel heads described in this invention can be directly subjected to simulated post-weld heat treatment after hot forming without requiring heat treatment to restore properties, while still meeting the mechanical property requirements of the steel plates prior to hot forming.