94 results about "Control rod" patented technology

The application relates to an anti-vibration ring network box, and relates to the technical field of ring network boxes, which comprises a box body, a mounting cavity is formed on the vertical surface of the front side of the box body, a box door for detachably mounting the opening of the mounting cavity is arranged, wire connection ports communicated with the mounting cavity are formed on the left and right side surfaces of the box body; a fixing seat located below the wire connection port is fixedly arranged on the inner wall of the box body, a sealing seat is rotationally connected to the upper side edge of the fixing seat away from the box door; a control rod is fixedly arranged on the side surface of the sealing seat facing the box door, an elastic extrusion piece is arranged on the inner wall of the box body, the elastic extrusion piece drives the control rod to rotate towards the fixing seat, a sealing gap is formed on the side surface of the fixing seat and the sealing seat away from each other, and an elastic pad is fixedly arranged on the inner wall of the sealing gap; the application reduces the possibility that the insulation layer and other parts of the external cable are damaged and broken due to long-term friction.

The application belongs to the technical field of control rod drive mechanism, and particularly relates to a heat insulation sleeve assembly of a magnetic lifting type control rod drive mechanism. The heat insulation sleeve assembly comprises a pipe base, a guide sleeve and a guide cover. The upper part of the pipe base is a first end, and the lower part is a second end. The radial dimension of the first end is larger than that of the second end. The lower part of the second end is provided with a first connecting end, and the guide sleeve is fixedly connected with the first connecting end of the pipe base. The upper part of the guide cover is provided with a fourth connecting end, and the lower part is provided with a horn cover. The fourth connecting end of the guide cover is fixedly connected with the second fixed end of the guide sleeve. The heat insulation sleeve assembly of the application is in a fixed state, and the problem of active wear of the heat insulation sleeve assembly is solved from the root.

This utility model relates to the field of dispersion technology, specifically a dispersion machine for producing fireproof sealant, comprising: a device body, the device body including an equipment body, a control rod disposed at the bottom of one side of the equipment body, and a disperser disposed at the bottom end of the control rod; an assembly structure sleeved on the outer wall of the control rod, the assembly structure including a control ring, and a threaded sleeve connected to the bottom end of the control ring. This utility model, by rotating the angle of the control ring, causes the threaded sleeve connected to the bottom end of the control ring to be rotatably connected to the outer surface of the bottom end of the control rod. The rotation of the threaded sleeve using a bearing does not affect the angle of the fixed ring, and the fixed ring and support frame limit the position of the threaded sleeve. The thread connects the control rod and the threaded sleeve, thereby achieving a rapid assembly effect between the control rod and the disperser, avoiding the problems of easily damaging the disperser by drilling screw holes, and the need to re-drill holes when the screw holes are severely worn, further causing damage.

The utility model relates to the technical field of parts spraying, disclose a kind of cable bridge bracket, including adjusting sleeve, the inner wall sliding connection of adjusting sleeve has stand, the inside sliding connection of adjusting sleeve has control rod, the outer wall fixed connection of control rod has rotating rod, the inner wall rotation connection of rotating rod has fixed shaft, the both ends fixed connection of fixed shaft have fixed link, the inner wall fixed connection of rotating rod has locking rod, the bottom fixed connection of adjusting sleeve has bridge seat, the inner wall fixed connection of bridge seat has cable rack, the bottom of adjusting sleeve is equipped with the installation component of being installed with ease. In the utility model, press control rod compression spring, push rotating rod to make locking rod separate from adjusting sleeve to adjust bridge height, spring reset lock after loosening, realize tool-free adjustment and automatic locking by spring and lever principle, stable and suitable for complex working conditions.

The utility model relates to copper foil detection field discloses a copper foil tensile strength detection device, including bottom plate, first clamping unit, second clamping unit, drive unit, the bottom plate is equipped with support plate, support plate first clamping unit and second clamping unit are connected in sequence on the bottom plate, drive unit includes first drive module, control rod, ratchet, pawl, elastic part, first drive module is connected on the support plate, and the power output end of first drive module is connected with first clamping unit, the ratchet is connected on first drive module, the pawl rotation is connected on the support plate, one end of elastic part is connected with support plate, and the other end is connected with pawl, control rod sliding is connected on the support plate. This detection device can improve the convenience of detecting tensile strength and tensile endurance.

This application discloses a bearing skeleton seal removal device and method. The bearing skeleton seal removal device includes a control rod, a fixed block, a sliding block, and at least two sets of splitting structures. The fixed block is installed on the control rod, and the sliding block is slidably connected to the control rod. Each splitting structure is evenly arranged along the axial direction of the control rod and includes a first connecting rod, a second connecting rod, a connecting block, and a shovel head. The sliding block, first connecting rod, connecting block, second connecting block, and fixed block are sequentially rotatably connected. The shovel head is installed on the side of the connecting block facing away from the control rod. The sliding block slides to move the shovel head radially towards or away from the control rod. The bearing skeleton seal removal device disclosed in this application integrates multiple functions. Simply operating the control rod to move the sliding block controls the shovel head's movement to complete seal removal. It eliminates the need for multiple separate tools, greatly simplifying the operation process and reducing the difficulty of operation. Even non-professionals can quickly learn to operate it.

This application belongs to the technical field of air intake systems and discloses an air intake system for an integrated carbonization machine, including an air intake pipe, a first mounting shaft, a first semi-circular plate, a second mounting shaft, and a second semi-circular plate. A connecting rod is hinged to one side of the second semi-circular plate, and the end of the connecting rod away from the second semi-circular plate is hinged to the first semi-circular plate. A sliding seat is slidably installed inside the air intake pipe, and control rods are hinged to both sides of the sliding seat. One end of the control rod is hinged to the first semi-circular plate. A drive assembly and an air intake assembly are installed inside the air intake pipe. The drive assembly drives the sliding seat to slide, which in turn moves the control rods, causing the two first semi-circular plates and the two second semi-circular plates to rotate. The two first semi-circular plates become flush and seal the inside of the air intake pipe, and the two second semi-circular plates similarly seal the inside of the air intake pipe. The two sealing structures ensure the sealing effect inside the air intake pipe, preventing outside air from entering the carbonization machine through the air intake pipe, thereby ensuring the carbonization effect of the material inside the carbonization machine.

Proposed is a control rod fixing mechanism for a control rod assembly (100) with an assembly hole that passes through vertically, wherein the control rod fixing mechanism includes a control rod (110) inserted into the assembly hole and screw-fastened, an end plug (112) extended to an upper portion of the control rod and having a recessed fastening groove (112A) provided on an upper surface thereof and, and a cap member (120) provided with a fastening projection (121) that tightly fits into and secures the recessed fastening groove (112A) and configured to be inserted into and assembled with an open end of the assembly hole.

This application provides a flow-induced vibration testing method, a test loop, and a reactor test specimen. The testing method is suitable for selecting a final optimized strategy for the reactor test specimen. The testing method includes controlling the transverse flow rate and transverse flow direction inside the reactor test specimen using a first strategy and a second strategy with different variables from the first strategy; measuring the flow-induced vibration parameters of the control rod portions corresponding to the first and second transverse flow sections when using the first and second strategies respectively; recording the flow-induced vibration parameters measured using the first and second strategies as the first flow-induced vibration parameter and the second flow-induced vibration parameter respectively; comparing the specific data of the first and second flow-induced vibration parameters; and selecting the final optimized strategy from the first and second strategies based on the comparison results.

The application discloses a belt filter press deviation rectifying device and method, and belongs to the technical field of auxiliary equipment of belt filter press.The device comprises a rack, a deviation rectifying roller, a detection rod, a proportional valve, a control rod, a displacement conversion assembly and a deviation rectifying cylinder, and each component is installed on the rack; the detection end of the detection rod is attached to the edge of the filter belt, and converts the filter belt deviation into the displacement of the detection rod; the displacement conversion assembly connects the detection rod and the control rod, and realizes accurate displacement transmission; the proportional valve is matched with a tapered valve core through a V-shaped throttling groove, realizes linear regulation of the air inlet flow, drives the deviation rectifying cylinder to extend and retract, and adjusts the roller seat of the deviation rectifying roller.The deviation rectifying method comprises pre-tightening detection, displacement conversion, deviation rectifying action and reset emergency steps, realizes self-adaptive deviation rectifying of the filter belt "small deviation slow rectification and large deviation fast rectification", and can accurately capture slight deviation, avoids secondary deviation of the filter belt, is stable in operation, has high universality, and can guarantee continuous operation of the belt filter press.

This utility model belongs to the field of hydraulic support technology, and in particular to a limiting device for a hydraulic support in mining equipment. It includes a control console and a limiting box plate. An arc-shaped groove is formed on the periphery of the limiting box plate. A U-shaped block is fixedly installed on the inner bottom wall of the control console. A control rod is rotatably connected to the U-shaped block via a rotating shaft. A rectangular groove is formed at the upper end of the control rod, and a connecting rod is inserted into the inner wall of the rectangular groove. A second control rod is fixedly welded to the upper end of the connecting rod. An elastic component connects the rectangular groove and the connecting rod. This utility model changes the original matching locking box design by dividing a control rod into two parts, with the addition of an elastic component and a limiting component. This allows the entire unit to directly apply force to the second control rod to complete the rotation of the control rod, eliminating the cumbersome operation of two parts and improving overall practicality.

This invention belongs to the field of control component assembly technology, specifically relating to a control component assembly device and method. It includes an assembly platform, control rod support plates, a support plate connecting shaft, a drilling guide plate, a connecting handle positioning fixture, and a drilling device. Multiple control rod support plates and one drilling guide plate are mounted on the assembly platform. The support plate connecting shaft passes through the control rod support plates and the drilling guide plate. The connecting handle positioning fixture is installed on the outside of the drilling guide plate on the assembly platform, and the drilling device is arranged on the side of the assembly platform. The beneficial effect of this invention is that the square connecting shaft connects the control rod rotation support plates, avoiding asynchronous rotation caused by slippage of multiple control rod support plates, which could lead to control rod torsion.

This application relates to the technical field of soft magnetic material alloys, specifically to an alloy and its preparation method, a passive shutdown device, and a reactor. The alloy comprises: 60.0-75.0% Ni by weight, 0.1-0.5% Mn by weight, 0.01-0.1% Si by weight, less than 0.01% C by weight, with the balance being Fe. The alloy prepared using the composition provided in the embodiments of this application exhibits high Curie temperature control accuracy at high temperatures, and also possesses high permeability and low hysteresis loss. Its magnetic flux can change rapidly within a predetermined temperature range. Therefore, when applied to a passive shutdown device, the alloy can rapidly demagnetize above the predetermined temperature range, causing the control rods to fall into the reactor core, thus meeting the high sensitivity technical requirements of passive shutdown devices.

The application discloses a leaf filter briquette dismounting tool, which solves the technical problem of time-consuming and laborious manual replacement in the prior art. The tool comprises a supporting structure, an ascending structure and a control structure. The supporting structure comprises a supporting frame and two supporting clamps, and the two supporting clamps are respectively installed at two ends of the supporting frame. The ascending structure comprises an ascending frame and at least two clamps, and the straight line where each clamp is located is parallel to the straight line where the two supporting clamps are located. The control structure comprises a first connecting piece, a second connecting piece and a control rod. The first connecting piece is installed on the supporting frame, the second connecting piece is installed on the ascending frame, and the first connecting piece and the second connecting piece are both connected with the control rod, and the control rod is used for driving the second connecting piece to move up and down relative to the first connecting piece. The leaf filter briquette dismounting tool disclosed by the application reduces the time of traditional manual operation, thereby improving the overall cloth replacement efficiency, and the automation and convenience make the operation simpler, reduce the demand for manpower and lower the labor cost.

This invention belongs to the field of numerical calculation technology in nuclear reactor physics. It provides a method and system for calculating the burnup of a fuel assembly that moves with control rods. First, an axial mesh is generated at the interface of the axial material segments and merged with the initial mesh to obtain the mesh before the control rod position changes. Then, an axial mesh is generated at the interface of the axial material segments and merged with the initial mesh to obtain the mesh after the control rod position changes. The mesh after the control rod position changes is offset to obtain the offset mesh. Finally, the burnup weight of each mesh in the mesh before the control rod position changes is calculated, and the burnup value of each mesh in the offset mesh is calculated based on the burnup weight and the burnup value of each mesh in the mesh before the control rod position changes. This method ensures the matching of the burnup calculation mesh and the neutronics calculation mesh, improves the accuracy of burnup calculation without reducing the computational mesh size, and guarantees computational efficiency.

Disclosed are a 177-core pressurized water reactor control rod bundle grouping arrangement method and a 177-core pressurized water reactor control rod in-bundle arrangement method. The control rod in-bundle arrangement method comprises respectively arranging four strong absorber rods at the position of coordinates (4, 4) in a grid array and positions of rotating same 90°, 180° and 270° around a gauge pipe grid cell. The control rod bundle grouping arrangement method comprises arranging control rod bundles which are divided into T rod groups, S rod groups and AO rod groups in a reactor core of 177 fuel assemblies. While the safety of reactor cores is ensured, the capability of adjusting and controlling control rods can be enhanced, so as to satisfy the control requirements for various load changes. Given a specified quantitative ratio of strong absorbers to weak absorbers, a stronger control capability and less disturbance to local power distribution are allowed.

This magnetic coupling magnetically couples an output shaft (91) and an input shaft (92) via a partition wall (62) positioned between the output shaft (91) and the input shaft (92), the magnetic coupling comprising magnet groups (95, 96) provided on one shaft-facing surface of facing surfaces (91c, 92a) of the output shaft (91) and the input shaft (92), first magnets (95a, 95b, 96a, 96b) magnetized in the circumferential direction of one shaft, and second magnets (95c, 95d, 96c, 96d) magnetized in the radial direction of one shaft being alternately arranged along the circumferential direction of the one shaft in the magnet groups (95, 96), and the thickness of the first magnets (95a, 95b, 96a, 96b) and the thickness of the second magnets (95c, 95d, 96c, 96d) in the radial direction of the one axis being different.

The application provides an adjustable power nuclear heat supply reactor with a dry well, and belongs to the technical field of nuclear reactors. The application solves the problem of limited power of the existing nuclear heat supply reactor. The adjustable power nuclear heat supply reactor comprises a reactor container, a reactor core, a dry well, control rods, a thermal rise baffle, a turbulence assembly and an adjustable power heat exchange system. The reactor core and the dry well are arranged in the reactor container. The dry well is under normal pressure and has no coolant. The control rods are arranged in the dry well and inserted into the reactor core. The dry well is provided with the thermal rise baffle. The thermal rise baffle separates the rising channel and the falling channel of the coolant. The coolant is flashed in the rising channel. The turbulence assembly is arranged in each shunt. The adjustable power heat exchange system comprises a bus and a plurality of sub heat exchange systems. The bus is arranged in the dry well. Each shunt is provided with a sub heat exchange system. The sub heat exchange system is connected with the bus. The adjustable power nuclear heat supply reactor is mainly used for nuclear heat supply reactors.

A nuclear reactor may include a vessel having a wall defining an interior cavity. The nuclear reactor may include a spherical core disposed within the cavity. The spherical core may include a plurality of fuel elements. Each fuel element may extend from an outer periphery of the core along a radius to a central portion of the core. Each fuel element may include a solid matrix material that defines a plurality of fuel channels. The core may include a fuel material disposed in the plurality of fuel channels. The core may include one or more control rod channels, each extending from the outer periphery of the core along a radius to the central portion of the core. The nuclear reactor may include a reactivity control system that may have one or more control rods comprising a neutron absorbing material for insertion into the one or more control rod channels.

This invention specifically relates to a method for correcting the critical boron concentration under full power conditions. Based on a three-dimensional reactive equilibrium equation and considering the influence of temperature deviation on the Doppler effect, the critical boron concentration under full power conditions is: where CB ref This represents the critical boron concentration at full power; CB m ρ represents the actual boron concentration under the measured conditions. xem Indicates the equilibrium xenon poisoning under measurement conditions; ρ xeref This represents the balanced xenon poisoning at full power; ρ rccam Indicates the reactivity introduced by the control rod under measurement conditions; pr m Indicates the actual power under the measured conditions; HFP represents full power; α pc α represents the average of the sum of the power coefficients under the measured state and the full-power state; b T represents the average of the sum of the differential boron values ​​under the measured state and the full-power state; avgm T represents the average temperature of the moderator under the measured conditions. ref (pr m ) represents the moderator reference temperature under measurement conditions; α ttcm This represents the total temperature coefficient under the measurement conditions. The invention also relates to computer equipment and a computer-readable storage medium, outlining the steps for implementing the above-described method for correcting the critical boron concentration under full power conditions. Based on a three-dimensional reactive equilibrium equation, and considering the influence of temperature deviation on the Doppler effect, this invention achieves accurate correction of the critical boron concentration under full power conditions when nuclear power units increasingly participate in peak shaving.

This application discloses a pressurized water reactor (PWR) rod replacement control method and system. The method includes: obtaining the differential value relationship of each set of control rods in two sets of control rods. The differential value relationship includes the correspondence between the differential value of a corresponding set of control rods and the number of insertion steps for that set of control rods. The differential value is used to characterize the reactivity change caused by the control rods moving a unit distance from different heights. The two sets of control rods need to exchange the number of insertion steps during the rod replacement process. Based on the differential value relationship of each set of control rods, the average reactivity of the two sets of control rods per unit time is determined. Based on the average reactivity of each set of control rods, the number of movement steps for each set of control rods is determined. Based on the number of movement steps for each set of control rods, the target movement speed of each set of control rods is determined. The method controls each set of control rods to replace rods according to its corresponding target movement speed. This application can reduce the disturbance to the PWR core during the control rod replacement process.

This invention specifically relates to a primary loop vacuuming device and method for the upper reactor internals in the repositioned state, belonging to the field of nuclear reactor body maintenance. The device includes: a vacuuming cylinder for accommodating the upper reactor internals and its top control rod drive rod; a sealing assembly for using the device's own weight to compress and form initial contact stress, achieving an initial seal between the device and the core pressure vessel flange; an exhaust assembly connected to the inner cavity of the vacuuming cylinder for evacuating the primary loop; during the vacuuming process, the vacuuming pressure and the initial contact stress are superimposed to achieve further sealing between the device and the core pressure vessel flange; and a lifting assembly for lifting and guiding the device along a guide post inside the core pressure vessel to seat on the core pressure vessel flange. The method uses the device to perform primary loop vacuuming in the upper reactor internals in the repositioned state. This invention realizes primary loop vacuuming operations in the upper reactor internals in the repositioned state.

The utility model discloses a novel tower formula roll core clamping turnover mechanism, including double -deck support disc, the middle position vertical of double -deck support disc is provided with the pivot, and the pivot is in the middle position of double -deck support disc and rotates, the outside of double -deck support disc top all vertical encircles and is provided with the hinge shaft fixing frame, and the middle position rotation of hinge shaft fixing frame is penetrated with hinge shaft, and the hinge shaft fixing frame and the connecting place between double -deck support disc swing and are provided with the gear shaft, one end of hinge shaft is synchronously connected with the jaw control rod, and the jaw control rod transverse location hinge shaft fixing frame back department, the both sides drive connection of the jaw control rod other end has the jaw block, and the jaw block all vertical distribution is in the both sides department of hinge shaft fixing frame forward one side, the outside of double -deck support disc bottom all vertical encircles and is provided with the roll core placing seat, and the roll core placing seat top vertical place has the roll core.

A method for measuring drop time of a control rod cluster integrated with a rod position measurement device is provided, wherein the method is used to measure the drop time of the control rod cluster, and includes following steps. A voltage Ua of coils in Group A is monitored to capture a rod cluster drop signal. A point (tmax, Vmax) with a maximum drop speed is searched. An end of a time period when the control rod cluster starts to drop is retroactively calculated from tmax. A start of the time period when the drop reference signal DROPref drops from a maximum value to 33% thereof is retroactively searched from a minimum value point of a drop reference signal DROPref. A time point t6 when a drop speed of the control rod cluster is lower than 0 is determined from tmax forward.

The application provides a supercapacitor-based nuclear power primary frequency modulation power smoothing control method and system, relates to the technical field of nuclear power unit frequency modulation control, and comprises the following steps: performing time-frequency domain analysis on a target frequency modulation power sequence, extracting power change rate and duration characteristics, combining reactor thermal inertia and control rod adjustment delay characteristics, predicting the power response boundary of the nuclear power unit, decomposing the target frequency modulation power into a nuclear power unit bearing component and a supercapacitor compensation component, and adjusting the distribution of the two components under the constraint of the energy margin of the supercapacitor, so as to smooth the power output curve of the nuclear power unit and improve the primary frequency modulation capacity of the nuclear power unit and reduce the thermal stress and safety risk of the unit.

A flow-blocking plug for a control rod guide tube includes a flow-blocking plug installed at the upper end of the control rod guide tube, with a cylindrical shell at the lower part of the flow-blocking plug inserted into the control rod guide tube. The flow-blocking plug includes bolt holes, a circular boss, a cross-shaped flange, a drainage hole, and a cylindrical shell. The flow-blocking plug is connected to the upper end of the control rod guide tube via the cross-shaped flange. A drainage hole is provided on the cross-shaped flange. The top of the flow-blocking plug is a circular boss, with a bolt hole at the center of the circular boss, through which a lifting ring is installed. This invention achieves circumferential and radial positioning of the flow-blocking plug, and by evenly distributing a certain number of circular holes on the cross-shaped flange as drainage holes, only a small amount of coolant is allowed to flow into the control rod guide tube to cool the control rod drive mechanism. An internally recessed threaded hole is provided at the center of the upper circular boss of the flow-blocking plug for installing lifting rings and other tools, facilitating the installation and removal of the flow-blocking plug.

The utility model relates to the field of building engineering quality detection discloses a concrete crack depth measuring scale, including main ruler and vice ruler, the surface of main ruler is equipped with vernier caliper, the bottom of vice ruler is provided with connecting assembly, the connecting assembly includes control rod and square frame, the control rod slidingly connects on the inner wall of main ruler, the bottom fixed connection of control rod has pull rope, the one end fixed connection of pull rope away from control rod has the clamping block, the clamping block is elastically connected with the inner wall of vice ruler through reset spring, the bottom of vice ruler is provided with the protruding portion. In the utility model, through setting connecting assembly, realize the quick locking and connection of vice ruler and main ruler, need not external tool to complete fixed, thereby increase the range of measuring scale, and at the end of use, through pulling control rod, separate main ruler and vice ruler, thereby reduce the overall length of measuring scale, and further convenient to carry, improved the portability of measuring scale.

Proposed is a control rod assembly with enhanced control rod worth suitable for a small modular reactor (SMR), wherein the control rod assembly includes a plurality of spider vanes provided radially on a plane perpendicular to a spider body (110) and configured to support control rods, wherein the spider vanes includes four first spider vanes (Ixx and Iyy) arranged orthogonally to each other in principal-axis directions, four second spider vanes (Ixy) arranged in on-diagonal directions with respect to the first spider vanes, and eight third spider vanes (Ixxy and Ixyy) arranged in off-diagonal directions between the first spider vanes (Ixx and Iyy) and the second spider vanes (Ixy), wherein each of the first spider vanes and the third spider vanes is provided with two absorber rods, and each of the second spider vanes is provided with one absorber rod, thereby resulting in 28 absorber rods in total.