16results about How to "Flexible and adjustable" patented technology

The invention discloses a width-adjustable wide-frequency-domain acoustic waveguide based on an interval coupling type topological boundary state, and belongs to the technical field of topological photonic crystals. The acoustic waveguide comprises interval coupling type topological boundary state scatterers and a substrate, and is characterized in that the interval coupling type topological boundary state scatterers are all arranged on the substrate; the periodically arranged scatterers form a cellular array, the scatterers are divided into I-type photonic crystals PnC1 and II-type photonic crystals PnC2 according to the rotation angles of the scatterers, a plurality of topological paths are constructed by arranging the two photonic crystals in a spaced coupling mode, and the wide-frequency-domain acoustic waveguide with the adjustable width is achieved. The width-adjustable acoustic waveguide is realized by introducing a plurality of topological paths, and low-loss, high-efficiency and wide-frequency-domain unidirectional transmission of acoustic wave signals along the topological paths is finally realized. The waveguide has high robustness and width adjustability, and a new thought is provided for solving the problem of connection between a topological structure and block equipment.

The invention belongs to the technical field of industrial reactors, and particularly relates to a joint control system and method for an oxidizing agent, a reforming agent and gas film gas in a carbon-containing substance conversion reforming reactor / process. According to the joint control system and method for the oxidizing agent, the reforming agent and the gas film gas in the reforming reactor, the adding amount and the adding proportion of the oxidizing agent and the reforming agent are adjusted by correlating reactor outlet product gas components and the temperature, reaction heat is fully utilized, certain flexibility and adjustability of the reactor product gas components are achieved, and the reaction efficiency is improved. Meanwhile, the gas flow of the gas film is regulated and controlled by correlating the temperature of the gas film device, and the gas film agent forms a radial pressure gradient, so that gas film thermal resistance is formed along the wall direction, a refractory material is protected, the service life of internal components of the reactor is prolonged, and the problem of frequent burning loss of the internal components in the prior art is solved.

The utility model relates to the technical field of folding table lamps, in particular to a multi-section folding table lamp device which comprises a supporting mechanism, a folding mechanism and a lighting mechanism, the folding mechanism is located at the top end of the supporting mechanism, and the vertical lifting function of the lighting mechanism is achieved through a first telescopic rod, a second telescopic rod and a third telescopic rod arranged on the folding mechanism. The multifunctional chair can meet different requirements of users, is flexible in adjustability, not only saves space, but also is more convenient to store and carry when being used outdoors. By means of a first rotating shaft and a rotating block arranged on the folding mechanism and a containing groove formed in the supporting mechanism, when the table lamp device does not need to be used, a second telescopic rod and a third telescopic rod can be retracted, then a table lamp shell is reversely folded to one side of the first telescopic rod, and finally the first telescopic rod is folded into the containing groove. The folding storage mode is simple and efficient, the occupied space of the table lamp device is greatly saved, and the use experience feeling is improved.

This utility model discloses a preservation device for processing agricultural and sideline products, including a preservation box with multiple vertically distributed storage compartments fixed inside. A rotating shaft, rotating in tandem with the storage compartments, is rotatably connected inside the preservation box. Multiple leveling components, corresponding to the storage compartments, are fixed to the outer wall of the rotating shaft. This preservation device for processing agricultural and sideline products achieves synchronous processing of materials in multiple storage compartments by driving the rotating shaft and the multiple leveling components to rotate synchronously through the rotating components. Through the linkage of the rotating plate, elastic component, mounting plate, and leveling rod in the leveling component, the rotational motion is converted into a gentle leveling and agitating action on the surface of the materials. The elastic component ensures that the force when the leveling rod contacts the materials is flexibly adjustable, effectively turning the materials while avoiding mechanical damage to the surface of agricultural products from rigid impacts. This spreads and disperses accumulated agricultural and sideline products, facilitating their preservation and improving their preservation effect.

The invention discloses a self-adaptive control method for hand joints of a humanoid robot. The method comprises the following steps: firstly, determining a position vector of a geometric center point of a grabbing surface by using pressure sensors mounted at the tail ends of fingers; calculating expected pressure and actual pressure vectors of the tail ends of the fingers; and calculating a finger end point position correction vector by using the contact elastic coefficient matrix to realize self-adaptive correction of the end point position. The method has the advantages that objects can be grabbed in a self-adaptive mode according to the set contact elastic coefficient only through the pressure sensors installed at the tail ends of the fingers, the flexibility is adjustable, the algorithm is simple, and the method is suitable for various humanoid robots with different finger numbers.

The invention relates to a local oscillator optimization design method for cylindrical shell vibration reduction, comprising: constructing a cylindrical shell physical model of a cylindrical shell including a superstructure unit, and obtaining the dynamic equation of the cylindrical shell physical model to determine the resonance frequency band of the cylindrical shell including the superstructure unit; dividing a plurality of superstructure unit groups; determining structural parameters for influencing the resonance frequency of the superstructure unit, and constructing an optimization parameter group for all superstructure unit groups; determining the resonance frequency of a superstructure unit group, and constructing the distribution law of the resonance frequencies between the plurality of superstructure unit groups; adding material parameters to the cylindrical shell physical model and exciting it, and picking up the frequency response of the outer surface of the cylindrical shell physical model; constructing an optimization model based on the optimization parameter group, the distribution law and the frequency response, and determining the optimal solution of the structural parameters in the optimization parameter group based on the optimization model and with the minimum vibration amplitude as the goal, so as to realize the optimization of the local oscillator for cylindrical shell vibration reduction.

The application provides a trimming tool. The trimming tool comprises a housing, a cutting mechanism and a driving mechanism, wherein the cutting mechanism has a cutting plane, the driving mechanism is configured to drive the cutting mechanism to operate, and a guard plate is arranged on the housing; an indicating mechanism is arranged on the guard plate, and the indicating mechanism is configured to indicate a deflection state of the cutting plane relative to a reference plane; wherein a straight line extending along the length direction of the cutting plane and parallel to the reference plane is taken as a deflection axis, and the deflection state is a state that the cutting plane is deflected relative to the reference plane around the deflection axis.

The present invention discloses a magnetic levitation robot arm support system, which adopts a composite structure of inner and outer stators and a supporting rotating body and a magnetic levitation support technology, so that the supporting rotating body can be rotated and positioned under the support of the inner and outer stators, and the electromagnetic attraction between the inner stator and the rotating rotor is used to absorb the mechanical pressure of the robot arm on the supporting tower, dynamically adjust the air gap between the inner stator and the supporting rotating body, realize the flexible adjustment of the axial reference of the robot arm, and the strict frictionless positioning control of the supporting rotating body, and introduce a passive damping system based on the axial magnetic ring belt of the outer stator and the magnetic slot structure of the inner rotor, passively smooth the influence of the gravity fluctuation of the robot arm system on the air gap between the stator and the rotor, and ensure the stability of the axial reference of the robot arm support system. The real practical application of this invention will effectively broaden the working space of the robot arm and solve the problems that the traditional robot arm support system cannot adjust the axial reference and the rotation positioning accuracy is not high.

An optical storage DC distribution network voltage inertia control method based on variable virtual capacitance provided by the present invention comprises the following steps: determining a topological structure of an optical storage DC system, the optical storage DC system comprising a photovoltaic unit, an energy storage unit, a DC load unit and two VSC grid-connected units, the number of the VSC grid-connected units being equal to that of the photovoltaic unit, the energy storage unit, the DC load unit and the VSC grid-connected units being equal to that of the photovoltaic unit; the input ends of the two VSC grid-connected units are connected with an alternating current power grid, and the output ends of the two VSC grid-connected units are connected to a direct current bus; the energy storage unit, the DC load unit and the photovoltaic unit are connected with the DC bus. Determining a direct current side power equation of the VSC grid-connected unit; a fixed virtual capacitor is introduced into the direct current side power equation, and the fixed virtual capacitor is determined; determining variable virtual capacitance based on the fixed virtual capacitance; and determining a voltage inertia control equation based on the variable virtual capacitance, and controlling the light output direct current system to work based on the voltage inertia control equation.

The utility model relates to a resistor chain, in particular to a space-adjustable flexible resistor chain, and aims to solve the technical problem that an external resistor chain of a middle storage switch is easy to shift and contact a peripheral pull rod of the middle storage switch to cause surface flashover. The utility model comprises n resistors, (n + 1) locking units and (n-1) sleeves, wherein n is an integer and is not less than 2; the n resistors are sequentially connected through the n-1 locking units and the n-1 sleeves to form a resistor assembly, and the two ends of the resistor assembly are connected with the supporting column balls through the locking units respectively. The locking unit comprises a female joint, a locking nut, a joint ball and a joint rod; the joint ball is fixedly connected with one end of the joint rod; one end of the female joint and the joint ball form a universal joint structure through a locking nut, and the other end of the female joint is connected to one end of a resistor in a sleeved mode. The other end of the joint rod located between every two adjacent resistors is fixedly connected with one end of the other resistor through a sleeve, and the other ends of the two joint rods located at the two ends of the resistor assembly are directly and fixedly connected with the supporting column ball.

The utility model belongs to the technical field of decoration construction, and particularly relates to a building decoration construction sand blasting device which comprises a collecting frame, a mounting plate is mounted on one side of the collecting frame, an abutting plate is slidably mounted on the outer side of the mounting plate, five sliding rods are mounted on one side of the interior of the abutting plate at equal intervals, and a groove is formed in the mounting plate. One end of each sliding rod penetrates into the corresponding groove and is provided with a limiting block, and a compression spring is fixedly connected between the inner side of the abutting plate and the mounting plate. When the sand blasting gun sprays sand to a decoration surface, part of the sand falls off due to rebound or incomplete attachment to the decoration surface, the abutting plate makes contact with the decoration surface, the abutting plate is connected with the mounting plate through the sliding rod and the compression spring, certain elastic adjustability is achieved, and the falling sand can be collected by the collecting frame; the function of effectively collecting a small amount of falling sand is achieved, ground pollution is reduced, the cleanliness of a construction site is kept, and meanwhile waste of the sand is reduced.

The utility model belongs to the field of electric cross-country motorcycles, and particularly relates to a damping mechanism of an electric cross-country motorcycle, which comprises a damping mechanism, the damping mechanism comprises a base and a second traction frame, the second traction frame is provided with an adjusting head, the adjusting head is provided with an oil-gas mixing cylinder, the oil-gas mixing cylinder is provided with external threads, and the external threads are provided with threaded knobs. The threaded knob is provided with an adjusting mechanism, the adjusting mechanism comprises a rotating ring, the threaded knob is provided with a rotating ring groove, the rotating ring is assembled with the threaded knob, the rotating ring is provided with an arc block, the arc block is provided with a supporting block, the supporting block is provided with a guiding block, and the guiding block is provided with a positioning hole. According to the damping mechanism of the electric cross-country motorcycle, through cooperation of the positioning hole and the rotating ring, the problem that in the running process of an existing electric cross-country motorcycle, installation of a threaded rotary knob and an external thread on an oil-gas mixing barrel is prone to being affected by vibration, and the threaded rotary knob and the external thread on the oil-gas mixing barrel are loosened is solved.

The invention discloses a combined positioning tool and a flexible assembling method of an electronic equipment damping device.The tool comprises a bottom plate, a fixed vertical plate, an adjusting vertical plate and a damping device installing hole are arranged on the bottom plate, the fixed vertical plate is fixedly connected with the bottom plate in a screwed mode, a sliding groove for the adjusting vertical plate to slide is formed in the bottom plate, and the damping device installing hole is formed in the adjusting vertical plate. The adjusting vertical plate is fixedly connected with the bottom plate in a screwed mode after sliding to a proper position along the sliding groove. The combined positioning tool is made of aluminum alloy, low in cost and capable of being used repeatedly. The device is simple in structure and convenient to operate, the adjusting vertical plate can slide along the sliding groove, the position is flexible and adjustable, and the device is applicable to different assembly platforms.

This invention discloses a first wall structure for a tokamak vacuum chamber, used in the weak-field side region. The first wall structure includes a first wall module body and a transition support. The first wall module body includes a detachable graphite layer, a graphite foil, and a back plate fixed together, with the graphite foil fixed between the graphite layer and the back plate. The back plate is fixedly connected to the transition support, which is installed on the inner wall of the vacuum chamber. Internal components within the vacuum chamber are installed in the space between the transition support and the inner wall. This invention integrates the modular graphite design with the back plate as a whole on the transition support, eliminating the need for installation within the confined vacuum chamber space, reducing installation difficulty, and simplifying the positioning of the graphite. This facilitates the installation, disassembly, and subsequent maintenance of the first wall module body. Other internal components are not installed within the graphite, reducing manufacturing costs. The internal components are highly adjustable, meeting the flexible adjustment needs of many internal diagnostic systems.

The invention relates to an online laser heat treatment device and method for a pipeline welding joint. The device comprises an openable clamping assembly matched with a pipeline; a lifting mechanism, a laser heat treatment mechanism and a cooling treatment mechanism are correspondingly arranged on the two clamping assemblies; a clamping control assembly is arranged to be matched with the clamping assembly. A controller is arranged in cooperation with the lifting mechanism, the laser heat treatment mechanism, the cooling treatment mechanism and the clamping control assembly; after the pipeline is welded, the controller controls the clamping assembly to be opened, and after the clamping assembly is buckled to the preset position of the outer side of the pipeline, the clamping assembly is controlled to be closed; and the lifting mechanism is controlled to enable the whole device to move in the pipeline direction, and the laser heat treatment mechanism and the cooling treatment mechanism are controlled to sequentially machine the joint positions till laser heat treatment is completed in the whole welding joint area. The device has the characteristics of flexibility, adjustability, adaptability to the field environment, integrated control, high efficiency and energy conservation, and provides reliable technical support for long-period safe operation of a pipeline welding structure.

The application provides a preparation method of nanocellulose-based composite thermal insulation material and application thereof. The method first prepares a GO-NC-Ce hybrid dispersion liquid through ultrasonic-assisted self-assembly; then, a flexible polymer is used as a matrix, carbon nanotubes, pre-dispersed aerogel particles, phase change microcapsules, a phase change energy storage framework and a composite foaming system are added, and a multifunctional composite slurry is prepared through high-speed shearing and vacuum degassing; subsequently, a gradient ice crystal template is formed through a freeze-drying technology by controlling a freezing rate, and a foaming body with a gradient pore structure of a bottom layer, a main body layer and a surface layer is obtained after sublimation of the ice crystal; finally, a surface layer slurry containing sepiolite fibers, nanometer titanium dioxide and a hydrophobic agent is sprayed on the surface of the foaming body and solidified to obtain the composite thermal insulation material. The obtained material has controllable porosity and excellent heat insulation performance, and is suitable for the field of wearable textile thermal insulation.