374 results about "Torsional deformation" patented technology

The invention relates to the technical field of data processing, and discloses a large steel structure hoisting precision real-time monitoring method and system. The method comprises the following steps: scanning and collecting the edge of a steel structure through a distributed sensor network, and obtaining structure data to obtain an original monitoring data set; extracting and analyzing structure transient response features based on the original monitoring data set, and generating a state feature matrix; analyzing a coupling relationship between local deformation and overall torsion to obtain a dynamic response prediction matrix; performing space-time registration and data fusion on the monitoring data, and constructing a state evaluation data set; carrying out optimization calculation on the hoisting parameters to generate a hoisting control data packet; and performing intelligent reasoning analysis in combination with historical case data, and outputting a control instruction sequence. Real-time monitoring of the coupling relation between local deformation and overall torsional deformation in the hoisting process of the large steel structure is achieved, and the technical defect that in the prior art, the structural deformation development trend cannot be accurately recognized and predicted is overcome.

The invention discloses a cultural relic preventive protection method based on big data analysis, belongs to the technical field of cultural relic protection, and mainly aims to solve the technical problem that a complex damage mechanism caused by mutual coupling of torsional deformation and inclined deformation in cultural relic protection is difficult to accurately predict. A dual-mode deformation data stream is obtained through a multi-point sensor, accurate data alignment is achieved through millisecond-level time synchronization processing, and correlation characteristics between deformation modes are recognized by calculating a coupling strength coefficient through correlation analysis. And when the coupling strength exceeds a threshold value, determining a deformation propagation direction vector by combining a spatial interpolation method, and calculating an internal stress distribution field and positioning a stress concentration area by utilizing a finite difference method. High-frequency sampling tracking is carried out on the high-risk area, and a stress relaxation time constant and a creep coefficient are obtained. Accurate prediction and active protection of cultural relic deformation damage are realized.

The invention discloses an aluminum profile double-traction device, and relates to aluminum profile production and processing equipment. The first tractor and the second tractor are arranged on the same guide rail assembly in parallel; the guide roller assembly comprises a guide roller for bearing and conveying the aluminum profile; when the first tractor or the second tractor passes, the guide roller assembly swings downwards to prevent the guide roller from interfering with a clamp. Floating clamps are arranged on the first tractor and the second tractor, torque caused by guide roller retardation or initial stress of the aluminum profile is effectively absorbed and released through the floating clamps, torsional deformation in the horizontal plane is prevented, and the shape quality of the profile is ensured.

The utility model relates to a tensioning device for a building block type screw. The tensioning device comprises a stretching piece, a pressing piece, a telescopic piece and a driving piece. The stretching piece is used for being connected with a locking piece of the building block type screw. The pressing piece is used for being connected with a thread element of the building block type screw. One end of the telescopic piece is connected with the stretching piece, and the other end of the telescopic piece is connected with the pressing piece; the driving part is connected with the telescopic part and used for driving the telescopic part to do telescopic motion. Compared with the prior art, the tensioning piece and the pressing piece only transmit axial force to the shaft core and the thread element, so that the transmission efficiency of the tensioning force is high, and compared with a radial screwing mode of a traditional torque wrench, radial load is not borne between the shaft core and the thread element, and the torque wrench is simple in structure and convenient to use. The problem that the friction coefficient is increased due to torsional deformation of the thread element and the shaft core spline is solved.

The invention discloses an elastic material hydrofoil fluid-solid coupling cavitation erosion forecasting method based on a potential energy theory, and belongs to the field of computational fluid mechanics and cavitation. The implementation method comprises the following steps: simulating the cavitation of the hydrofoil made of the elastic material by using a tight coupling algorithm to obtain the pressure and steam volume fraction distribution of the surface of the hydrofoil; a steam volume fraction distribution based on pressure; constructing an erosion index correction factor F for representing the bending torsional deformation degree of the elastic material hydrofoil to correct the cavitation erosion index represented by the pressure wave power density; the cavitation erosion indexes larger than a threshold value are screened out, and the final cavitation erosion risk index is a quotient after superposition of the cavitation erosion indexes; the corrected cavitation erosion index data are interpolated into RGB color data, the data serve as a geometric structure model of a fourth-dimensional mapping elastic material hydrofoil, and the corrected cavitation erosion index numerical value is represented through color change. The corrected cavitation erosion index can more accurately forecast a cavitation erosion risk part on the surface of the hydrofoil made of the elastic material.

The invention relates to a multifunctional test loading device for simulating bending shear torsion performance of a wind power tower, which comprises a counter-force column, a counter-force longitudinal beam, a counter-force cross beam and four actuators, and is characterized in that the counter-force cross beam is fixed at the top of the counter-force longitudinal beam through a bolt and is connected with a first actuator for axially applying pressure; the bottom of the tower drum is connected and fixed through a loading support with a kidney-shaped hole, and the end of the tower drum is connected with a loading beam through a conversion piece and abuts against a first actuator for axial pressure applying and loading. A fourth actuator on one side of the reaction wall is used for applying horizontal shearing force and torque; second and third actuators on the upper and lower sides of the counter-force longitudinal beam are used for applying bending moment; according to the device, loading of multiple load types can be achieved on the tower drum, the complex stress condition possibly borne by the tower drum in the actual use process can be simulated, and loading of any change of a single load of the tower drum can also be simulated; the device is suitable for loading and fixing tower barrels of different types and sizes; and the influence of torsional deformation and horizontal displacement on vertical load loading can be reduced through structural measures.

The invention provides a vehicle body top cover structure, a railway vehicle, electronic equipment and a method. The car body top cover structure comprises a middle top cover, an air duct, a longitudinal beam and top cover edge beams, the air duct and the longitudinal beam are connected to the lower end of the middle top cover, the top cover edge beams are connected to the two ends of the middle top cover, the top cover edge beams extend in the length direction and divide the section of each top cover edge beam into a plurality of special-shaped cavities, and the cross section of each top cover edge beam is a special-shaped section with one end becoming wider from narrow. The thin end of the special-shaped section is connected with the middle top cover; the middle top cover comprises an upper face plate, a framework and a lower face plate which are sequentially stacked from top to bottom, the upper face plate, the framework and the lower face plate are connected through tough glue, a foam plate is embedded in the framework, and the longitudinal beams are arranged on the two sides of the air channel respectively. The top cover edge beam air conditioner bearing and lightweight design is achieved, and under the constraint conditions of air conditioner bearing, integrated overall deformation, torsional deformation and the like, overall deformation is controllable in the two-time vehicle weight ultimate bearing state.

A hybrid drive omni-directional motion actuator based on an origami structure, comprising at least one actuating module. The actuating module comprises a columnar shell deforming based on the origami structure, an upper cover plate and a lower cover plate. The columnar shell is the origami structure derived from Waterbomb crease, and a cavity containing gas is formed inside the shell. The two ends of the cavity are open, and the openings are respectively connected with the upper cover plate and the lower cover plate for blocking the openings. The lower cover plate is provided with vent holes communicating with the cavity, and the upper cover plate and the lower cover plate are pulled by driving ropes arranged in a crossed manner. Through the cooperation of gas and tendon drive, the columnar shell can have deformations of contraction, bending and torsion, so that a single actuating module has omni-directional movement capability.

The invention relates to a wind power tower bending shear torsion test loading anti-interference decoupling switching integrated device, which comprises a reaction wall, a support, a reaction column, a reaction longitudinal beam, a reaction cross beam and four actuators, and is characterized in that the top end of a fixed tower on the support is connected with a loading beam through a switching device; the first actuator applies axial load to the tower drum through the loading beam and the switching device, the second actuator and the third actuator apply bending moment to the end of the tower drum through the loading beam and the switching device, the fourth actuator is matched with the connecting piece, the rectangular steel plate is connected with the switching device to apply horizontal shearing force and torque to the end of the tower drum, and application and decoupling of various types of loads are achieved. The test precision is ensured; the device can truly simulate the load condition of the tower drum section, can also be matched with the loading beam to transmit the axial force, the bending moment, the shearing force and the torque to the wind power tower drum, and effectively solves the influence of horizontal displacement and torsional deformation on loading in the horizontal and vertical load coupling loading process in the wind power tower drum composite load simulation test.

The invention discloses a test device for measuring the compression strength of a composite material plate, which comprises an upper box body and a lower box body, a guide column is arranged between the upper box body and the lower box body, an upper clamping assembly is arranged at the lower end of the upper box body, a lower clamping assembly is arranged at the upper end of the lower box body, and the upper clamping assembly and the lower clamping assembly have the same structure and opposite installation directions. The upper clamping assembly or the lower clamping assembly comprises two wedge-shaped clamping block units which are oppositely arranged, and the end part of the test piece is clamped between the two wedge-shaped clamping block units. The invention also discloses a test method for measuring the compression strength of the composite material plate. The test device can stably work for a long time in high and low temperature environments, meets the test requirements of a compression test, adopts a split design, is rapid in clamping, can effectively resist bending and torsional deformation, improves the test efficiency and accuracy, keeps reliable clamping all the time in the test process, and is simple in structure and convenient to operate. And the problem of clamping failure caused by thermal expansion and cold contraction is effectively solved.

The application relates to a torsion extrusion device and method for enhancing torsion shear effect, which comprises an extrusion cylinder for arranging a blank to be extruded; a movable extrusion punch mounted in the extrusion cylinder and used for extruding the blank; and a multi-stage cavity rotary die connected with the extrusion cylinder and comprising a circular cross-section conical cavity, a first transition cavity, a wavy cross-section straight cavity, a second transition cavity and a circular cross-section straight cavity which are connected in sequence and integrally formed. Compared with the prior art, the application can solve the problem of slip in the torsion extrusion process and make the torsion deformation zone and the extrusion deformation zone of the material coincide, so as to enhance the torsion shear effect and realize good grain refinement effect.

The invention discloses a soft electrostatic torsion driving unit and method and a driver, the soft electrostatic torsion driving unit comprises an output part, a torsion deformation structure and a driving base which are connected in sequence, the torsion deformation structure comprises an elastic element and a flexible electrode, and the driving end and the driven end of the flexible electrode are relatively twisted by a set angle; the driven end of the flexible electrode is connected with the output part, and the driving end of the flexible electrode is connected with the driving base; two ends of the elastic element are respectively connected with the driving base and the output part, a conductive layer and an insulating layer are arranged on the driving base, and the active end of the flexible electrode is arranged above the insulating layer; a liquid dielectric output device is arranged in the driving base, an outlet of the liquid dielectric output device is located at the edges of the conducting layer and the insulating layer, and the elastic element is in a pre-tightening state; the invention has the advantages of compact structure, high driving efficiency, high response speed and large torsion angle, and can provide a new technical solution for the design of a complex flexible driving device.

The invention relates to the technical field of gantry crane dynamic operation safety testing, in particular to a crane dynamic operation safety testing method which comprises the following steps: step 1, multi-dimensional static calibration; step 2, fault coupling simulation; step 3, structured data processing; step 4, coupling judgment; step 5, source tracing; and step 6, carrying out targeted rectification. A multi-dimensional static calibration, fault coupling simulation and targeted rectification scheme is designed according to the structure and working conditions of cart one-way walking, main beam-supporting leg rigid welding, long track bearing, bilateral braking and open-air operation of the gantry crane. The limitation of insufficient adaptability to the integrated structure of the gantry crane in the prior art is broken through, and the problem of test distortion caused by neglecting equipment attributes is solved. Aiming at the characteristics that the box type girder of the gantry crane is large in torsional rigidity, small in torsional deformation and mostly caused by internal defects or uneven external stress, progressive traceability of internal defect detection, external load checking and connection state checking is adopted.

The invention discloses a twistable flexible mechanical arm and a robot, and belongs to the technical field of robots. The mechanical arm comprises a single-section continuum framework composed of a supporting disc and an elastic pipe, a torsional deformation driving mechanism used for driving the far-end supporting disc to rotate, and a bending driving mechanism composed of at least three driving ropes. The supporting discs except the far-end supporting disc are provided with guide holes allowing the driving rope to slide in the circumferential direction, and therefore decoupling of twisting and bending motion is achieved. The torsional deformation driving mechanism can adopt a central elastic hose mechanical driving scheme or an external magnetic field magnetic driving scheme. According to the invention, the single-section structure can simultaneously realize two bending degrees, one stretching degree and one independent active torsion degree of freedom, so that the tail end flexibility is obviously improved, and the single-section structure is suitable for narrow and small space operations such as medical minimally invasive surgery and precise assembly.

The invention relates to the technical field of blade testing, and discloses a blade torsional fatigue testing system and method.The blade torsional fatigue testing system comprises a test bed foundation and at least one torsional vibration exciter, and the test bed foundation is suitable for fixing the root of a blade; the torsional vibration exciter comprises a vibration excitation unit and a blade clamp, the blade clamp is suitable for being clamped and fixed to a blade, the vibration excitation unit is fixed to the blade clamp, and the vibration excitation unit is configured to apply torsional loading to the blade. The blade root is rigidly fixed through the test bed foundation, and displacement interference in the non-torsion direction is prevented from being generated in the test process; a blade clamp of the torsion vibration exciter is clamped on a specified section of a blade, a vibration excitation unit is directly fixed on the surface of the blade clamp through a mechanical connecting piece, the vibration excitation unit generates periodically changing rotating torque during operation, the torque is transmitted to the blade through the blade clamp, and the blade is forced to generate reciprocating torsion deformation around the axis of the blade. And the torsional fatigue load under the actual working condition is simulated.

The invention discloses an intravascular stent bending torsion fatigue test device, and belongs to the technical field of fatigue test machinery. The intravascular stent bending torsional fatigue test device comprises a rack, the rack comprises a door-shaped support, a back plate and a base, the door-shaped support is provided with a bending load module, the bending load module comprises a first stepping motor, the output end of the first stepping motor penetrates through the back plate and is fixedly connected with an eccentric wheel through an extension shaft, and a pair of sliding blocks is additionally arranged; a sliding rail is arranged on the inner side of the door-shaped support, the sliding blocks are arranged on the sliding rail, a cantilever is connected between the pair of sliding blocks, the top of the cantilever is connected with the lower side of the top of the door-shaped support through a spring, a plurality of first loading connectors are arranged on the front face of the cantilever, and a torsion module is additionally arranged. The fatigue durability under bending-torsion dual loads can be tested, and the fatigue performance of the stent under the condition of blood vessel deformation during limb movement can be truly simulated.

The invention relates to a vibration damping and buffering protection superstructure based on local resonance and compression-torsion coupling. The vibration damping and buffering protection superstructure comprises a middle circular ring and two compression-torsion pipes, wherein the two compression-torsion pipes are symmetrically arranged with the middle circular ring as the center in a chiral mode. Each pressure torsion pipe comprises an outer circular ring and a connecting rod; the outer circular ring and the middle circular ring are coaxially arranged; two ends of the connecting rod are respectively connected to the middle circular ring and the outer circular ring; the plurality of connecting rods are uniformly arranged along the middle circular ring; and a resonance ball is arranged on each connecting rod in a penetrating manner. When vibration or impact invasion occurs, the superstructure generates a local resonance effect and a compression-torsion coupling mechanism, and the wave energy dissipation efficiency is better and more stable. Through the chiral symmetric pressure torsion tube, coupling of longitudinal and torsional deformation modes is realized, and polarization of longitudinal waves and torsional waves is promoted. Therefore, the polarized band gap can be induced to block longitudinal waves. Meanwhile, the resonance balls on the connecting rods generate a remarkable local resonance effect, and wave energy is dissipated through local resonance. According to the invention, impact protection and vibration isolation performance can be synergistically improved.

The present invention discloses a test bench for simulating the torsional working conditions of an engineering vehicle frame, comprising a base, a front fixing portion, a rear fixing portion, a front loading portion, and a rear loading portion; the front fixing portion comprises a support seat, a torsion arm, and two front alternative leaf springs; the support seat is mounted on the base; the torsion arm comprises a connected rotating section and a transmission section; the middle portion of the rotating section is rotatably mounted on the support seat, and its two ends are respectively located on opposite sides of its axial direction; the two front alternative leaf springs are respectively connected to the two ends of the rotating section; the rear fixing portion is mounted on the base and is spaced apart from the support seat along the axial direction of the rotating section; the front loading portion is arranged on the base and is transmission-connected to the transmission section; the rear loading portion is arranged on the base and is used to apply a load vertically to the frame. This solution can simulate the torsional deformation caused by the torsional load borne by the actual vehicle frame; it can also simulate the load borne by the frame when carrying cargo, and can replace the whole vehicle test to conduct reliability and durability tests on the engineering vehicle frame, and has strong practicality and promotion value.

The invention relates to the field of heat treatment processes, and discloses a deformation control method of a thin-wall special-shaped structure sheet metal part for a liquid rocket engine, the sheet metal part is made of a 30CrMnSiA trough plate, and the deformation control method comprises the following steps: vertically hanging the trough plate through steel wire binding during quenching; fixing the lower end of the trough plate in the vertical direction to prevent swinging in the quenching process; during quenching, the temperature of a quenching furnace is increased to the set preheating temperature below the quenching temperature, then the fixed trough plate part is put into the quenching furnace, the temperature is slowly increased to the quenching temperature along with the furnace, and the stress applied to a trough plate machine is pre-eliminated in the slow temperature increasing process; the temperature of quenching oil is increased to 40 DEG C or above, quenching deformation of the trough plate caused by a steam film generated by the oil is prevented, and a heat treatment production line is used for automatic feeding, turnover, quenching, cleaning and tempering heat treatment to complete the trough plate heat treatment procedure. According to the method, the hardness performance of the groove plate cannot be affected, warping and torsional deformation of the groove plate can be effectively controlled, the first-pass yield is improved, the reworking process and the rejection rate are reduced, and the production cost of the groove plate is saved.

The application provides a seamless steel pipe machining straightening equipment, and belongs to the technical field of steel pipe straightening, which comprises a first adjusting seat, a second adjusting seat, a unified driving mechanism, a correction assembly and a calibration frame provided with a plurality of detection units. The seamless steel pipe machining straightening equipment can realize synchronous angle adjustment of multiple straightening rollers in the same row through the unified driving mechanism, and then the actual position state of the second adjusting seat is detected through the detection units to form corresponding detection signals in combination with the correction assembly, so that the consistency of the second adjusting seat is calibrated. Without the need to establish a complex absolute angle detection and calibration system for all straightening rollers respectively, the actual position state of the second adjusting seat is directly detected by the detection units, the detection result is not affected by the transmission wear, gap and synchronous shaft torsional deformation of the unified driving mechanism, the deviation between the theoretical angle of the input end and the actual working state of the end can be effectively avoided, and the consistency of the actual working state of the multiple straightening rollers is improved.

The invention relates to an axle motion instantaneous center analysis method and device, computer equipment and a medium. The axle motion instantaneous center analysis method comprises the steps that the incidence relation between the moving horizontal distance of a first center of a single plate spring in a spring assembly after longitudinal torsional deformation and the relative distance of a spring eye and the incidence relation between the effective half length and the longitudinal torsional angle of the single plate spring are obtained; differentiating the longitudinal torsion angle to obtain a proportional relation between the first vertical position and the relative distance of the spring eye; the first vertical position is the position of the first instantaneous center of the single leaf spring in the vertical direction of the first coordinate system; when the number of the plate springs is multiple, a second vertical position is obtained based on the correction coefficient of the correction proportional relation, the number of the plate springs, the effective half length of the non-main-leaf plate springs and the effective half length of the main-leaf plate springs; the second vertical position is the position of the second instantaneous center of the plurality of plate springs in the vertical direction of the second coordinate system; and based on the second vertical position and the horizontal position of the second instantaneous center, the movement instantaneous center position of the axle located at the second center of the multiple leaf springs is determined. According to the method, the accurate position of the axle movement instantaneous center can be obtained.

The utility model relates to an ironing plate for a paver and belongs to the field of pavers. According to the technical scheme, the device comprises a basic section ironing device, telescopic section ironing devices are arranged on the two sides of the basic section ironing device in a sliding mode respectively, a telescopic mechanism is arranged between the basic section ironing device and the telescopic section ironing devices, a connecting frame is arranged on the basic section ironing device, and a first guide hole is formed in the connecting frame; the telescopic mechanism comprises a first side end plate, a second side end plate and two layers of sliding columns arranged between the two side end plates, the number of each layer of sliding columns is at least two, the upper layer of sliding columns are arranged in the first guide holes in a sliding mode, the lower layer of sliding columns are connected with the telescopic section ironing device in a sliding mode, and the two layers of sliding columns move together during primary stretching; the two layers of sliding columns do not move in the second-stage stretching and retracting process, the stretching and retracting section ironing device moves in the length direction of the sliding columns to complete second-stage stretching and retracting, and the situation that due to the fact that two independent stretching and retracting mechanisms are adopted on one side, the torsional deformation resistance is weak, and then the requirement for heavy-load construction is difficult to meet is avoided.

The present invention discloses a method for improving the plasticity of a magnesium alloy by secondary manipulation of twin orientation through torsional deformation. The method comprises the following steps: applying compressive stress to a pretreated magnesium alloy bar for pre-deformation, wherein the compressive stress is applied perpendicular to the c-axis of the grains within the magnesium alloy bar, and the deformation amount of the pre-deformation is 0.5% to 8%; subjecting the pre-deformed magnesium alloy bar to one to eight torsional deformation passes at a temperature of 150°C to 250°C and a torsion angle of 10° to 180°, followed by annealing to obtain a high-plasticity magnesium alloy. The method of the present invention can achieve the purpose of secondary manipulation of twin orientation, thereby significantly improving the plasticity of the magnesium alloy bar. It has the advantages of simple process, convenient operation, and low equipment cost, and can be applied to large-sized magnesium alloy billets.

This invention discloses an early warning method applicable to large drum shaft systems. It includes arranging high-precision measuring sensitive units on the shaft system to collect physical information about the torsional deformation and torque experienced during drum shaft rotation. This physical information is transmitted as an electrical signal to a signal conversion and transmission unit, which converts the electrical signal into a digital signal. This digital signal is then transmitted to a digital signal receiver via an induction coil. The digital signal receiver not only receives the digital signal but also engages in induced energy coupling with the induction coil. Electrical energy can be transmitted through the digital signal receiver and received by the induction coil, thereby powering the high-precision measuring sensitive units and ensuring their normal operation. The digital signal receiver transmits the digital signal to a signal processing unit, which processes it into an analog current signal and sends it to an early warning unit. The early warning unit determines whether an alarm is triggered and issues an early warning. Beneficial effects: High monitoring accuracy, wide coverage, and improved safety and reliability.

An annuloplasty device is configured to mechanically deform annuloplasty tissue while providing structural disruption energy to induce plastic deformation. In some embodiments, the mechanical deformation includes vacuum-induced tissue attachment, optionally with or without additional operations to pull or extend the tissue. In some embodiments, the mechanical deformation includes torsional deformation of the tissue. Optionally, torsional deformation is limited by the device to a predetermined twist angle, such as in the range of 60 DEG to 120 DEG. In some embodiments, the torsional deformation includes rotating a shaft extending between tissue embedding needles of the device from a first angle oblique to the local circumference to a second angle and past an intermediate angle perpendicular to the local circumference. In some embodiments, a non-piercing transducer delivers structure disruption energy by contacting a surface of annulus tissue.

The invention discloses a soft body rolling building block based on paper folding, and relates to the technical field of deformable structures, the soft body rolling building block comprises a soft body unit, and the soft body unit can generate torsional deformation so that the two ends of the soft body unit can be oppositely close to each other; the two reinforcing units are fixed to the two ends of the soft body unit respectively; the driving units are arranged in a circumferential array mode with the center axis of the soft body unit as the center, one end of each driving unit is connected with one reinforcing unit, the other end of each driving unit is connected with the other reinforcing unit, contraction generated when the driving units are heated can enable the two reinforcing units to be close to each other in the opposite direction, and in the approaching process of the reinforcing units, the driving units are not prone to deformation. And the soft body unit generates torsion and drives the reinforcing unit to rotate. Periodic bending or twisting of the rolling structure is achieved by controlling the states of the different driving units, so that the rolling behavior of the rolling structure is induced, the driving units arranged at equal intervals are used for achieving local controllable driving of the rolling structure, and therefore the deformation path is controllable.

The utility model discloses a load copper bar quick connection tool for testing the electrical performance of a galvanic pile, and relates to the technical field of fuel cell testing, the load copper bar quick connection tool comprises a front clamping plate, a rear clamping plate, a copper bar plate and a test connector, the copper bar plate is arranged between the front clamping plate and the rear clamping plate, and the test connector is connected with one end, extending out of the front clamping plate and the rear clamping plate, of the copper bar plate; the top of the front clamping plate and the top of the rear clamping plate are respectively provided with a fixing piece used for fixing a test connector. According to the application, when an operator inserts the test connector on the copper bar plate and abuts against the driving piece, the driving piece is pushed downwards and drives the fixing piece to move, and then the test connector is fixed on the copper bar plate through the fixing piece, so that the copper bar plate is more convenient to test; when the internal threaded pipe rotates, the torsional spring is promoted to be subjected to torsional deformation, and when the steel cable loses traction force, the torsional spring recovers deformation to drive the internal threaded pipe to rotate and reset, and the clamping rod is promoted to move to be separated from the test connector, so that an operator can conveniently disassemble the test connector.

The utility model discloses an anti-deformation door body structure which comprises an outer layer, stand columns are arranged at the four corners of the outer layer, and threaded holes are formed in the middles of the stand columns. The core layer is positioned on the inner side of the outer layer; first through holes are formed in four corners of the core layer; the reinforcing layers are arranged on the two sides of the core layer and are respectively a first reinforcing layer and a second reinforcing layer; second through holes are formed in four corners of the reinforcing layer; the inner layer is arranged on the inner side of the second reinforcing layer, round grooves are formed in the four corners of the inner layer, and third through holes are formed in the round grooves in a penetrating mode. A penetrating type stress conduction system is formed through a bolt connection structure of the stand columns and the multiple layers of through holes, and the door body can be effectively prevented from torsional deformation in cooperation with a stress buffering structure of the circular groove. Meanwhile, the core layer and the honeycomb partition plate form a dual composite supporting system through the aluminum core base plate, and the polyurethane foaming material is filled, so that the high compressive strength and the excellent sound insulation performance are achieved.

The utility model provides a pipeline mounting structure and an automobile, and relates to the field of automobile design and manufacturing. The utility model provides a pipeline mounting structure. The pipeline mounting structure comprises a fixed part and a rotating part, a first through hole is formed in the fixing piece, and the fixing piece is fixedly connected with a vehicle structure; the rotating piece is at least partially arranged in the first through hole and is fixed relative to the fixing piece in the axial direction of the first through hole, and a second through hole used for fixing a pipeline is formed in the rotating piece; and the rotating piece is arranged to rotate along the inner circumferential wall of the first through hole under the twisting driving of the pipeline. Through the optimized design of the pipeline mounting structure, the torsional shear stress in the torsional deformation process of the pipeline can be reduced, the fatigue damage easily caused after the pipeline is twisted for multiple times for a long time is inhibited, and the service life of the pipeline is prolonged.