611 results about "Bending moment" patented technology

The invention discloses an insertion tube and a manufacturing method thereof, an insertion part and an endoscope, and relates to the technical field of medical instruments, the insertion tube comprises an insertion body and an elastic tube, a first reinforcing layer and a second reinforcing layer are arranged in the insertion body, the second reinforcing layer is arranged outside the first reinforcing layer in a surrounding mode, and the first reinforcing layer is provided with a concave part. The first reinforcing layer and the second reinforcing layer can form double limiting and wrapping supporting on the elastic pipe, the concave shape of the concave part of the first reinforcing layer is utilized to be attached to the outer wall outline of the elastic pipe, and the outer side of the second reinforcing layer is matched for enclosing and restraining, so that the installation stability of the elastic pipe in the first channel can be greatly improved; bending moment generated by self-gravity, external force and the like of the elastic tube is effectively counteracted, the elastic tube is prevented from being bent under the action of self-gravity, external force and the like, the whole insertion tube is prevented from deforming along with bending of the elastic tube, and the form stability of the insertion tube in the cavity in the propelling process is guaranteed. And the straightness of a traction rope transmission path and the accurate conduction of a control instruction are ensured.

The embodiment of the invention provides a load balancing control method of a variable pitch system, which comprises the following steps of: continuously acquiring blade root bending moment and rotor azimuth angle signals, accurately preprocessing to obtain 1P harmonic information of bending moment in a flapping direction, and updating accumulated wear conditions of each blade under different azimuth angles in real time based on the 1P harmonic information. According to the method, a dynamic abrasion map is established, the active balance variable pitch offset is actively calculated based on the abrasion map, the load is intelligently guided from a heavily-abraded area to a lightly-abraded area, and a refined blade variable pitch angle is finally formed in combination with traditional IPC correction and a collective variable pitch instruction. In this way, key components such as the variable pitch bearing are prevented from bearing overhigh local stress for a long time in a specific azimuth angle, uniform abrasion of rolling bodies or raceways is achieved, and therefore local fatigue damage is remarkably reduced, and the service life of the variable pitch bearing of the wind generating set and the service life of related components are prolonged.

A multi-axial spine testing system includes a physiological motion unit (PMU); a uni-axial test frame having an input; and a fixture configured to be attached to the test frame and facilitates a plurality of primary motions of one or more of the PMU and the fixture. The plurality of primary motions includes a linear motion of the input and a rotational movement of an output. The fixture has an upper assembly directly or indirectly coupled to the input. The upper assembly transfers the linear motion (Tz) of the actuator to the rotational movement (Rx) of the output. The upper assembly and lower assembly apply a bending moment (MX) and an axial compression (Fz) to the PMU. An external transducer collects data related to or generated by at least the plurality of primary motions. The fixture simultaneously provides the bending motion and axial compression to the PMU.

A method and apparatus for testing a specimen with pressure, applying a torque using one or more plates coupled to the test specimen, applying a bending moment, and / or applying an axial load, either separately or simultaneously, with or without rotating the specimen, and without the applied forces interfering with each other.

The invention discloses a method and system for determining the optimal stress orientation of a concrete special-shaped sheet column, and relates to the technical field of constructional engineering. According to the method, a correlation model of special-shaped contour parameters and load conditions is constructed, a mechanical property key direction set is extracted, the screening range is narrowed, the optimal orientation determination efficiency is greatly improved, the design period is shortened, and the optimal orientation determination efficiency is improved based on multi-dimensional screening of all-circumferential inertia moment distribution, a rigidity curve and a bending moment contribution ratio. Core indexes such as section ultimate bearing capacity and ductility are comprehensively evaluated by combining stress simulation of a concrete nonlinear constitutive relation; through overall structure collaborative checking calculation and node stress analysis, it is ensured that the orientation meets the mechanical requirements of components and adapts to lateral force resistance and stress continuity of the overall structure, in combination with building construction requirements and node compressive strength redundancy optimization, the scheme of optimal mechanics but construction conflicts is eliminated, safety redundancy is reserved, the structure anti-disaster stability is guaranteed, and the construction safety is improved. And meanwhile, the method adapts to complex working conditions and specification requirements and ensures that the scheme can be directly applied.

The embodiment of the invention relates to the technical field of rotary joint testing, one embodiment of the invention provides a rotary joint test board used for testing a rotary joint, the rotary joint is provided with a first joint part and a second joint part which rotate relatively, and the rotary joint test board comprises a frame body; the seat body is arranged on the frame body and used for being connected with the first connector part; one end of the rotating part is provided with a free end, and the other end of the rotating part is used for being connected with the second connector part; the swing driving assembly is arranged on the frame body, connected with the rotating part and used for driving the rotating part to rotate; and the free end is rotationally arranged relative to the bending moment assembly, and the bending moment assembly acts on the free end in the radial direction of the rotating piece and is used for providing torque for deflection of the center shaft of the second connector part relative to the center shaft of the second connector part. Through the technical scheme, the technical problem that a rotary joint test device in the prior art is difficult to meet the performance test requirement of the rotary joint is solved.

The invention discloses a multi-axial force sensor with force measuring beams with high lateral force sensitivity and strong bending resistance, the multi-axial force sensor comprises a first table body, a second table body and a plurality of force measuring beams, the force measuring beams comprise a transverse force measuring beam and a vertical force measuring beam, the vertical force measuring beam comprises two sheet-shaped vertical beam arms which are parallel to each other, and the two sheet-shaped vertical beam arms are parallel to each other. The orientation of the larger side faces of the two thin-sheet-shaped vertical beam arms is consistent with the extending direction of the two ends of the transverse force measuring beam, and the two vertical beam arms are located on the two sides of the center line of the transverse force measuring beam respectively. The thin vertical beam arms are adopted, when the thin vertical beam arms are subjected to lateral force, deformation of the vertical beam arms is large, high sensitivity of the lateral force can be obtained, meanwhile, the vertical force measuring beam adopts a double-beam form of a thin-wall structure, the two vertical beam arms are separated by a certain distance, and the two vertical beam arms bear bending moment together, so that the force measuring beam can bear large bending moment. That is to say, the force measuring beam can maintain strong bending resistance on the basis of realizing high lateral force sensitivity.

The invention relates to the technical field of roller body welding equipment, and discloses roller body welding equipment and a technology, the roller body welding equipment comprises a welding table, a bearing and transferring assembly is arranged on the welding table, the bearing and transferring assembly comprises supporting plates symmetrically and fixedly arranged at the two ends of the welding table, and a plurality of first air cylinders are fixedly arranged at the lower ends of the supporting plates; the surface of a piston rod of the first air cylinder is sleeved with the same bottom plate, a two-way lead screw is rotationally arranged in the bottom plate, sliding blocks are symmetrically connected to the surface of the two-way lead screw in a threaded mode, a first bearing plate and a second bearing plate are arranged between the two symmetrical sliding blocks, and a sliding groove matched with the second bearing plate is formed in one side of the first bearing plate. By means of the cooperation of the first bearing plate and the second bearing plate which can be connected in a sliding and sleeving mode, a roller body can be stably borne and accurately transferred to the designated position of the welding table, and the roller body slowly rolls to the bearing platform along the inclined face by means of the self weight during discharging; and the non-uniform additional bending moment and shearing force caused by the dead weight of the roller body in the traditional three-point hoisting to a welding seam area are effectively avoided.

The invention provides a concrete normal section reinforcement design method and system, electronic equipment and a storage medium. The method comprises the following steps: establishing a section stress model containing multi-layer reinforcement strain distribution based on plane section assumption; the stress state of the whole process of the section from axle center compression to axle center tension is simulated by setting strain proportion parameters of the strain of the outermost reinforcing steel bar on the tension side and the limit pressure strain of the concrete; aiming at a plurality of set strain state control points, calculating stress of each steel bar layer position, contribution of the stress to axial force and bending moment and contribution of the stress to a concrete compression area; and based on the section static balance condition, the optimal reinforcement area meeting the design load requirement is determined through iterative calculation, and the configuration constraint of multiple layers of steel bars is considered in the iterative calculation. The method overcomes the defects that a traditional method overestimates the effect of the pressed steel bars and ignores the strain difference of multiple layers of steel bars, and the accuracy and safety of reinforcement design of high-performance concrete structures such as nuclear islands are remarkably improved.

The invention discloses a composite beam plastic flexural capacity correction calculation method considering interface slippage. The method is suitable for a hogging moment area of a steel-concrete composite beam reinforced by an external prestress carbon fiber reinforced composite material rib. The method comprises the following steps: firstly, determining basic static boundary parameters and a shear connector constitutive model; in the iterative calculation, solving a temporary bearing capacity by utilizing an axial force and moment balance equation, and calculating interface slippage along the beam length and a deformation loss item at the support based on internal force distribution; then determining a rigidity degradation coefficient according to the average slip amount, and dynamically reducing the static yield bending moment to reconstruct the plastic hinge length; and finally, constructing a corrected deformation coordination equation, deducting a deformation loss item in geometric deformation calculation to obtain the real elongation of the in-vitro CFRP rib, and updating a stress parameter until a result is converged. According to the method, by introducing a deformation loss item and a rigidity degradation mechanism, deviation caused by traditional rigid connection assumption is corrected, and accurate prediction of the ultimate bearing capacity is achieved.

The invention discloses a replaceable energy dissipation type prestress assembly type beam-column joint and a construction method thereof. The replaceable energy dissipation type prestress assembly type beam-column joint comprises a prefabricated column, a prefabricated beam, an angle steel connecting piece, a viscous damper, FRP cloth and a prestress tensioning piece. The FRP cloth is pasted to the joint of the prefabricated beam and the prefabricated column, angle steel connecting pieces fixed to the prefabricated beam and the prefabricated column are arranged on the outer side of the FRP cloth, and the two angle steel connecting pieces on the upper side are provided with viscous dampers arranged in the inclined direction. The prestressed tensioning part is of a downwards-protruding arc-shaped structure, a first hole channel and a second hole channel which are matched with the prestressed tensioning part are formed in the prefabricated beam and the prefabricated column respectively, anchoring blocks are arranged at the positions, corresponding to the first hole channel, of the upper end face of the prefabricated beam, the prestressed tensioning part is arranged in the hole channels in a penetrating mode, and the two ends of the prestressed tensioning part are anchored to the corresponding anchoring blocks respectively. The FRP cloth is adopted to enhance the integrity and durability of the joint, the downwards-protruding prestress tensioning piece can resist the sagging moment of the joint and cooperates with the viscous damper to efficiently dissipate energy, and rapid repairing is achieved by replacing the energy dissipation connecting piece.

The invention discloses an active dynamic balance control method and system for a tower crane, and the method comprises the steps: monitoring the vertical state of a tower body or the horizontal state of a working arm in real time, and obtaining an actual posture value; comparing the actual attitude value with a preset standard attitude value, and judging attitude deviation and direction; according to the deviation direction, a balance weight executing mechanism on the balance arm side is directly driven to act so as to change the balance torque, and the specific value of the needed torque is not calculated in advance in the adjusting process; and real-time monitoring is continuously carried out while adjustment is carried out until the attitude deviation is eliminated, and closed-loop control with the vertical tower body as a direct control target is formed. Through attitude feedback closed-loop control, any unbalance disturbance including inertia force can be sensed in real time and directly corrected, the tower body alternating bending moment is fundamentally eliminated, the foundation of tower body shaking is eradicated, the service life of a tower crane is remarkably prolonged, and meanwhile the structure of a control system is simplified.

The utility model belongs to the field of arch bridges, and discloses a tied-arch bridge which comprises a main span beam, side span beams and arch ribs. The main span beams extend in the bridge direction and bear vehicle loads and the weight of a bridge deck system. The side span beams are connected to the two ends of the main span beam in the bridge direction and can guide transmission of bridge deck loads, release the bending moment of the main span beam and reduce the rotating angle of the main span beam. The arch rib comprises a main arch rib and an auxiliary arch rib, the main arch rib is bent upwards, arch feet at the two ends of the main arch rib are connected to the two bridge-direction ends of the main span beam respectively, the arch foot at one end of the auxiliary arch rib is connected to the bridge-direction end of the side span beam, the arch foot at the other end of the auxiliary arch rib is connected to the main arch rib, and the main arch rib, the auxiliary arch rib and the side span beam define a triangular structure. By means of the geometric stability principle of a triangle, the corner displacement of the bridge end of the tied-arch bridge is effectively restrained, and the smoothness and comfort of driving on the bridge are improved. The structure can also reduce the destructive effect of the bending moment on the side span beam on the main span beam, and the overall durability and safety of the bridge are further enhanced.

The invention belongs to the field of urban renewal construction, and relates to a method for adjusting elevation and landing in place in building translation construction. In the process that a building returns and resets to a newly-built basement top plate, firstly, a temporary platform composed of a heightening steel beam and a heightening steel cushion block is laid on the newly-built basement top plate in advance so as to solve the height difference problem existing between the newly-built basement top plate and a translation rail. Secondly, triangular haunching plates are additionally arranged at the corners of the wall clamping beams for supporting the building; and a landing jack is directly arranged below the haunching plate. By means of the arrangement mode, the eccentric bending moment borne by the underpinning structure is greatly reduced, and absolute safety in the landing process is ensured. And finally, a set of repeatable standardized circulating steps is designed, and the effect that the existing building is always reliably supported in the landing process is achieved. The invention aims to overcome the defects in the prior art, and provides the building translation landing method which is safe to operate, accurate to control and capable of effectively coordinating the foundation height difference and optimizing the landing stress path.

This application belongs to the field of tunnel structure safety evaluation, specifically disclosing a quantitative evaluation method for the safety of shield tunnel structures. The method includes: determining joint opening and bolt stress as safety evaluation indicators for segment joints; determining structural bending moment, diameter change rate, and maximum joint opening as safety evaluation indicators for the overall structure; classifying each safety evaluation indicator into four levels and determining the grading threshold for each indicator at each safety level; using the analytic hierarchy process (AHP) to determine the weights of joint opening, bolt stress, structural bending moment, diameter change rate, and maximum joint opening in the fuzzy comprehensive evaluation; using a normal distribution membership function to calculate the membership degree of each safety evaluation indicator to each safety level; combining the weights and obtaining a weighted summation to obtain a comprehensive safety evaluation indicator; and determining the safety level of the shield tunnel structure. This application can accurately and comprehensively reflect the health status and complex stress evolution laws of the overall tunnel structure.

The present application relates to a rotary structure, in order to solve the problem that the rotary mechanism bears huge bending moment when the rotary working device of the existing excavator works, the present application constructs a swing arm rotary device and an excavator, wherein the swing arm rotary device comprises a rotary platform, a rotary mechanism fixed on the front part of the rotary platform, a swing arm support fixed on the rotary rotating part of the rotary mechanism, a limiting part arranged on the rear part of the swing arm support, and a limiting bearing part fixed on the rotary platform at the position behind the swing arm support; the limiting part has an upper limiting surface, the limiting bearing part has a lower bearing surface, the upper limiting surface and the lower bearing surface are a pair of rotary fitting surfaces, when the swing arm support rotates to face the front of the rotary platform, the lower bearing surface is located on the upper side of the upper limiting surface and the lower bearing surface is fitted with the upper limiting surface. The limiting part and the limiting bearing part of the present application offset the moment generated by the working device on the swing arm support, and reduce the bending moment on the rotary mechanism.

The invention relates to a method for determining the bearing performance of a large-span integrated wallboard, and the method comprises the steps: building a theoretical calculation model of the cracking bending moment of the wallboard, and enabling the theoretical calculation model of the cracking bending moment to be used for simulating the stress behavior of the wallboard in an elastic stage based on plane section assumption, the collaborative stress contribution of the inner framework and the outer panel of the wallboard in the elastic stage is comprehensively considered; a theoretical ultimate bending moment calculation model of the wallboard is established, the theoretical ultimate bending moment calculation model is based on the plastic theory and used for simulating the stress behavior of the wallboard in the plastic failure stage, and the strength contribution of an outer panel of a pressed area and a framework in a pulled area of the wallboard is considered; based on the cracking bending moment theoretical calculation model and the ultimate bending moment theoretical calculation model, the cracking bending moment and the ultimate bending moment of the wallboard are obtained respectively, and then the cracking load and the ultimate load of the wallboard are determined respectively. According to the method, the cracking bending moment theoretical calculation model and the ultimate bending moment theoretical calculation model of the wallboard are established respectively, the two models correspond to the two key stages (cracking and ultimate damage) of stress damage of the wallboard respectively, and the bearing performance of the integrated wallboard can be determined clearly and accurately.

The invention discloses a test device capable of loading a periodic bending moment load. The test device comprises a force loading device, a force bearing disc and an output shaft, the force loading device is fixed on equipment and is a fixed part, and the force bearing disc is coaxially connected with the output shaft to form a rotating part. The force loading device is eccentrically arranged relative to the axis of the force bearing disc, and protrusions are distributed on the force bearing disc in the circumferential direction. When the force bearing disc rotates, the protrusions on the force bearing disc make contact with the force contact assembly on the force loading device, the periodic eccentric axial force is passively received, the periodic bending moment load is generated, and then the periodic bending moment load is transmitted to the output shaft end of the tested motor or speed reducer. The structure has the advantages of only comprising a mechanical structure, being simple and reliable, being low in cost and being adjustable in different bending moment working conditions. The force loading device can further select an active servo forcing device, and at the moment, the disc surface of the force bearing disc does not need to be protruded. The servo force loading device applies eccentric axial force to the force bearing disc according to a certain frequency so as to generate a periodic bending moment load, and the magnitude and the frequency can be adjusted in real time.

The invention provides a closed-loop force-controlled size measuring device and method, the measuring device comprises a fixing frame, a force sensor, an object placing table and a pressing plate, the inner bottom side of the fixing frame is provided with a first vertical moving mechanism, the first vertical moving mechanism comprises a moving part and a fixing part connected with the fixing frame, and the fixing part is provided with a second vertical moving mechanism. The moving part can reciprocate relative to the fixed part in the vertical direction, and the storage table is connected with the moving part; a second vertical moving mechanism connected with the pressing plate is arranged on the inner top side of the fixing frame, and the second vertical moving mechanism can drive the pressing plate to reciprocate in the vertical direction; the force sensor is arranged at the bottom end of the first vertical moving mechanism, the fixed end of the force sensor is connected with the fixed frame, and the force bearing end of the force sensor is connected with the moving part. According to the invention, the first vertical moving mechanism can bear bending moment generated due to the fact that the workpiece to be measured is biased on the object placing table, it is ensured that the force sensor is only subjected to vertical pressure, and the force control precision can be improved.

This invention discloses a method for constraining corner elements in a rocking wall structure system. Based on the structural parameters of the rocking wall and the frame structure, the shear stiffness of the frame structure is obtained. A first lateral displacement expression and a second lateral displacement expression are constructed using the shear stiffness and the first and second equilibrium equations. An inter-story drift angle expression is then constructed using these expressions to solve for the stiffness of the rotating combined disc springs. The bending moment of the rotating combined disc springs is obtained from the stiffness of the rotating combined disc springs. The number of single disc springs stacked in the same direction and the number of combined disc springs are determined by the deformation requirement and the bearing capacity requirement of the combined disc springs obtained from the bending moment. This yields the combined height of the disc springs. The combined height of the disc springs is then used to constrain the length of the core rod and the support height in the corner element, achieving rapid constraint of the core rod length and support height in the corner element based on statics.

The invention belongs to the technical field of aircraft structure tests, and particularly relates to an axial compression test fixture. The device comprises a supporting clamp, a rolling contact piece and a loading clamp, one end of the loading clamp is connected with an axial compression load applying device, the other end of the loading clamp is provided with a semi-cylindrical mounting groove, the supporting clamp is of a semi-cylindrical structure and is mounted in the semi-cylindrical mounting groove of the loading clamp, and an arc-shaped space is formed between the supporting clamp and the bottom of the semi-cylindrical mounting groove; the device is installed in an arc-shaped space between a supporting clamp and a loading clamp, the center of a semi-cylinder plane of the supporting clamp is connected with one end of a test piece, and the other end of the test piece is connected with the other supporting clamp and the other loading clamp which are of the same structure. And the center of the end surface of the test piece, the center of the middle section of the support clamp and the center of the middle section of the loading clamp coincide. An ideal simple support boundary is provided through rolling contact design, load centering is ensured, additional bending moment is avoided, the structure is compact, and the test precision and practicability are remarkably improved.

The invention relates to the technical field of tunnel monitoring, and discloses an underwater tunnel structure health monitoring multi-source fusion and quality enhancement system and method, and the system comprises a sensing layer which is used for collecting the multi-source physical state information of a tunnel structure, and comprises the following subsystems: a structure stress state monitoring subsystem which employs a fiber bragg grating concrete strain gauge, the device is arranged at the maximum bending moment position of a tunnel roof and a longitudinal construction joint of a side wall to monitor concrete strain in real time. According to the system, a full-dimensional monitoring network covering tunnel structure stress, deformation joint multi-dimensional deformation, water leakage, differential settlement, internal water accumulation and overlying riverbed scouring and silting is constructed through cooperative arrangement of point type sensors and distributed sensing optical cables, accurate monitoring of key point positions is achieved, large-range continuous monitoring is achieved, and the monitoring precision is improved. The problem that traditional monitoring only focuses on a single dimension and has a monitoring blind area is thoroughly solved.

The present application belongs to the technical field of helicopter dynamics test, and relates to a method and system for measuring the distance between blades of upper and lower rotors based on measured bending moment. The measured bending moment data in flight is used, and the existing blade measurement system is used. Without additional measurement equipment, the relationship between bending moment and deformation is used to establish the calibration relationship between the test bending moment and the deformation of different profiles of the blade, so as to obtain the distance between the blades of the upper and lower rotors in the real-time flight state. The method can relatively real-time monitor the distance between the blades of the upper and lower rotors in the full flight spectrum state without additional measurement equipment, and ensure flight safety. The method has the advantages of simplifying the measurement method of the blade tip distance, shorter feedback time compared with the light ray sensor and radar wave measurement, and better real-time effect.

This invention relates to the field of metallurgical machinery and equipment and metal processing, specifically to an anode steel claw straightening machine and its method; it includes a C-shaped straightening frame, a main hydraulic cylinder, an ultrasonic indenter with a built-in ultrasonic transducer, an antagonistic hydraulic compensation blind cavity, and an industrial control computer; the system connects the antagonistic hydraulic compensation blind cavity located on the back side of the vertical column with the oil inlet of the rodless chamber of the main hydraulic cylinder; its core is that when the main hydraulic cylinder pushes, the expansion trend generated synchronously by the blind cavity is used to apply a reverse prestress bending moment to the vertical column; this invention effectively counteracts the elastic backward tilting deformation of the frame caused by the reaction force of the main thrust, prevents the amplification of the displacement deviation at the execution end, and thus ensures a tight fit between the ultrasonic indenter and the surface of the anode steel claw.

The invention discloses a cable-stayed bridge tower joint multi-point composite load loading device and a test method, and relates to the technical field of bridge engineering structure tests.A plurality of anchor holes are formed in a test room bottom plate, and a duplex tower test piece is fixedly connected to the test room bottom plate through test piece anchor bolts; the combined node cross beam is transversely connected to the middle of the duplex tower test piece and forms an integral structure with the duplex tower test piece; the column end bending moment loading device is used for applying a bending moment load to the column end of the duplex tower test piece; the column top axial force loading device is used for applying an axial force load to the column top of the duplex tower test piece; the cross beam multistage lever counterweight loading device is used for applying a counterweight load to the combined node cross beam; and the cross beam prestress loading device is used for applying prestress load to the combined node cross beam. According to the device, various types of loads can be synchronously applied to the joint nodes of the double towers of the cable-stayed bridge, it can be guaranteed that all the loading points are independent and controllable and do not interfere with one another, and meanwhile the requirement of large-tonnage loading for the test space can be effectively lowered.

The invention provides a motor stator for a short-bending-moment screw drill and a production method thereof.The motor stator comprises a shell part, a positioning part and a lining part which are coaxially arranged, the positioning part is sleeved with an inner cavity of the shell part, the lining part is sleeved with an inner cavity of the positioning part, and the lining part comprises a first ring layer and a second ring layer; the outer wall of the first ring layer is connected with the inner wall of the second ring layer in a sleeved mode through an adhesive, a containing cavity used for containing the rotor is formed in the inner wall of the first ring layer, the first ring layer is made of rubber, and the second ring layer is made of metal wires or fibers or cord fabrics. According to the motor stator for the short-bending-moment screw drill and the production method of the motor stator, the deformation resistance of the stator is effectively improved, the service life of the stator is prolonged, the stability of the drilling process is improved, and good torque transmission and bearing functions can be provided by reserving the first ring layer of the storage cavity.

A lifting column capable of bearing large bending moment belongs to the technical field of lifting motion equipment and comprises a mounting base, a linear actuator is hinged to the upper surface of the mounting base, a mounting upper seat is hinged to the top end of the linear actuator through a pin shaft, and a telescopic inner cylinder part is fixedly mounted on the lower surface of the mounting upper seat. An outer fixing plate is fixedly mounted on the upper surface of the mounting base, the outer fixing plate is located on the outer side of the telescopic inner cylinder part, a positioning guide assembly is mounted between the outer fixing plate and the telescopic inner cylinder part, and a reinforcing corner bracket is fixedly mounted at the upper end of the outer fixing plate. The air spring reduces load and develops tension bearing, the wiring groove and the drag chain assembly achieve internal wiring, the power device can be maintained, the problems that an existing lifting column is insufficient in bending resistance, insufficient in load utilization, disordered in wiring and high in maintenance cost are solved, and engineering applicability and economical efficiency are improved.

The utility model discloses an overhanging structure for a bay window of a building, which belongs to the technical field of bay window overhanging, comprises a bay window component, and is characterized in that an upper hanging component and a lower supporting component are arranged, so that the bay window component can be hung on the bay window; the mode that a traditional cantilever structure purely depends on a cantilever beam or plate to extend outwards from a building body to support a bay window is changed, bay window load distribution is more uniform, too large bending moment is prevented from being generated at the cantilever root, the large section size and the reinforcement quantity needed by the position for resisting the bending moment are reduced, the material cost and the structure self weight are reduced to a certain degree, and the construction efficiency is improved. Meanwhile, by means of the up-and-down cooperative supporting and hanging mode, better performance can be achieved in the aspect of resisting upsetting moment caused by lateral force generated by strong wind or earthquakes, the structural stability is enhanced, and compared with traditional cantilever structure construction, the structure does not need to be like a traditional cantilever structure.

The utility model discloses a T-beam hogging moment steel bundle toothed plate reinforcement cage positioning machining device which comprises a plurality of supporting assemblies arranged in rows and an adjusting rod (1) connected to the upper portions of the supporting assemblies. The support assembly comprises: a support base (2); the adjusting piece (3) is connected to the top of the supporting base (2) in a communicating mode; the lower part of the support frame (4) is in threaded connection with the adjusting piece (3); wherein the adjusting rod (1) is detachably mounted above the supporting frame (4). The positioning device is fully reliable, easy and convenient to assemble and disassemble, capable of being folded, small in occupied space, high in practicability and capable of accurately positioning the distance between a gradually-changed stirrup and a longitudinal steel bar so as to guarantee the positioning precision of manufacturing and forming of the anchoring toothed plate reinforcement cage, meanwhile, the machining quality and construction efficiency of the toothed plate reinforcement cage can be remarkably improved, and the construction cost is reduced. And manual intervention and machining errors are reduced.

The utility model discloses a kind of test device and test system of elastic bearing mechanical property, belong to elastic bearing performance test technical field, for solving the test device structure of elastic bearing mechanical property Complex, bulky, high cost and the problem of cumbersome test process. The test device of elastic bearing mechanical property of the utility model, including mounting, bending moment loading unit and axial compression unit;The two ends of mounting are used to respectively connect the inner ring end of two elastic bearings;Bending moment loading unit includes pivot, pivot's axis line and the axis line of two elastic bearings vertical intersection, and one end of pivot is fixedly connected with mounting;Axial compression unit is used to exert bidirectional axial static compression load to the outer ring end of two elastic bearings. The test device and test system of the utility model reduce the complexity and cost of test device and test system, improve the reliability and test efficiency of test device.