861 results about "Self weight" patented technology

The invention relates to the technical field of numerical control machine tools, in particular to a multi-station clamp of a numerical control machine tool, which mainly comprises a mounting seat and a fixing mechanism, the fixing mechanism is arranged above the mounting seat, the fixing mechanism comprises a first clamping block fixedly mounted on the top surface of the mounting seat and a pressing mechanism, and the pressing mechanism is arranged above the first clamping block. When the outer wall of a workpiece is clamped and fixed through a first clamping block and a second clamping block, the outer wall of the workpiece pushes a wedge-shaped block to move, the wedge-shaped block pushes a concave frame to move downwards when moving, the concave frame drives a connecting rod and an arc-shaped plate to move downwards, the arc-shaped plate drives a sliding rod and a pressing plate to make contact with the edge of the top face of the workpiece, and meanwhile the edge of the top face of the workpiece is pressed through elastic force generated by extrusion of a second elastic part. The top face edge of the workpiece is pressed and fixed through the pressing plate, so that in the workpiece machining process, the workpiece is not prone to deviating or sliding from the upper side due to the influence of external force or the self weight, and therefore the positioning precision of the workpiece and the machining quality of a final product are guaranteed.

The invention relates to the technical field of cables, and discloses a weather-proof high-strength tensile aerial insulated cable and a preparation method thereof.The weather-proof high-strength tensile aerial insulated cable comprises a cable conductor, a protection mechanism is arranged outside the cable conductor, a supporting mechanism is arranged inside the protection mechanism, and an outer sheath is connected to the outside of the protection mechanism through a cushioning mechanism; the exterior of the cable conductor is fixedly connected with a force bearing layer, the exterior of the force bearing layer is provided with a repairing layer, the exterior of the repairing layer is fixedly connected with a heat insulation fireproof layer, the cushioning mechanism comprises an elastic rubber layer, and the inner side of the elastic rubber layer is fixedly connected to the exterior of the heat insulation fireproof layer. According to the invention, through the hollow bionic structure with the diaphragm in the core tubular bearing layer, the self weight is greatly reduced, and excellent bending resistance and torsional rigidity are provided at the same time; when the bearing layer is accidentally impacted, the internal diaphragm can effectively prevent longitudinal spreading of microcracks like a firewall, and damage is limited locally.

The invention discloses a precision pipe fitting machining device and method, and relates to the technical field of precision pipe fitting machining. The controller is mounted on the surface of one side of the machine tool main body; the supporting mechanism is mounted at the top of the machine tool main body and is used for supporting a machined pipe fitting; the machining mechanism is connected with the machine tool body and used for machining the outer wall of the pipe fitting; the first clamping mechanism is mounted at one end of the machine tool main body and is used for fixing the front end of the pipe fitting; according to the precise pipe fitting machining device and method, by optimizing a clamping and supporting mechanism, the problem of bending deformation caused by self weight in the pipe fitting machining process is effectively solved, when the positioning base moves, the first spring automatically adjusts the positions of the sliding frame and the lifting frame, it is ensured that the sliding frame and the lifting frame are evenly distributed at different positions of the pipe fitting, and the machining precision is improved. And the bottoms of the pipe fittings are uniformly supported through the supporting blocks and the supporting rods at the tops of the lifting frames, downward bending deformation of the pipe fittings due to self weight is avoided, and the machining precision is improved.

The invention relates to the technical field of new energy automobile battery pack detection, in particular to a new energy automobile battery pack collision test device which comprises a transverse moving mechanism arranged on the upper side of a bottom plate, a lifting mechanism arranged on the outer side of the transverse moving mechanism, and a holding mechanism arranged on the lifting mechanism. According to the invention, targeted impact can be applied to a single area of the battery pack or composite impact can be synchronously applied to different areas of the battery pack, and extrusion acting force continuously applied to the battery pack by the pile body under the influence of self weight of a vehicle can be simulated in collision impact; according to the invention, the battery pack can be synchronously driven to transversely move in the process that the battery pack is vertically impacted, so that the composite stress state of the battery pack under the influence of vehicle inertia during actual collision can be simulated; the device can accurately simulate the vertical extrusion force applied to the battery pack by the pile body under the self-weight effect of a vehicle, and drives the battery pack to move transversely to test the influence of transverse extrusion friction on the overall structural stability of the battery pack in a non-impact or weak-impact state.

The invention provides an aircraft framework and an aircraft, the aircraft framework is used for the aircraft flying in the atmosphere, the aircraft framework comprises a cage serving as a framework main body, the cage bears the self weight and the flight load of the whole aircraft, at least two first turbojet engines can be contained in the cage, and the first turbojet engines are arranged in the cage; the cage is open at least in the lower portion and used for allowing the jet flow of the first turbojet engine to pass through. Through the arrangement of the cage which is a skeleton main body, a power source device of the aircraft is collected and gathered, so that the miniaturization of the whole aircraft is realized.

The invention discloses a continuous and efficient insulating glove voltage withstanding detection device and a detection method thereof, belongs to the field of insulating glove detection, and solves the problem that the knuckle part of an existing insulating glove cannot be detected during voltage withstanding detection, and the device comprises a supporting seat, a conveying assembly, a lifting storage barrel and a detector, according to the insulation glove detection device, through arrangement of the detection mechanism and the detector, a conductive detection rod can be stably inserted into the insulation glove, and along with operation of the lifting assembly, the distance between the lifting sliding cylinder and the mounting piece is gradually reduced; at the moment, the conductive detection piece automatically slides down to the lower end under the action of self weight and gravity to fill the internal space of the insulating glove, especially the knuckle part of the insulating glove, so that the detection area during equipment operation is enlarged, the equipment can comprehensively carry out withstand voltage detection on the insulating glove, and the detection efficiency is improved. And the accuracy and the stability of detection data are ensured.

The invention discloses a dry-method electrode film rolling compounding method and dry-method electrode film rolling equipment. The method comprises the following steps: leading out a current collector film from an unpowered unreeling shaft, forming a suspension arc by virtue of self weight, and penetrating through a first roller gap; synchronously unrolling the two dry-method electrode films in an unpowered manner, so that the two dry-method electrode films enter the first roller gap in a self-weight overhanging state and are attached to the two surfaces of the current collector film to form an initial complex; coating the outer side of the initial complex with an isolating membrane to obtain a to-be-heated complex, and enabling the to-be-heated complex to enter a second roller gap after the to-be-heated complex is overhung by self weight; the to-be-heated composite body is subjected to hot-pressing compounding through compounding rollers on the two sides of the second roller gap; and then stripping the isolating membrane and rolling the double-sided dry-method pole piece. According to the method, near-zero tension conveying is achieved through natural suspension, and by matching with isolation film wrapping and one-time double-face pressing of the hot-pressing roller, edge micro-cracking and whole belt breakage of the dry-method electrode film can be effectively avoided, and the interface density and the roll-to-roll production yield are improved.

The invention discloses a stress calculation method of a composite pull disc and a weaving method of the composite pull disc and an insulation rope section, belongs to the field of electric power tools, solves the problem that stress of the composite pull disc is difficult to assess, and adopts the technical scheme that the composite pull disc comprises a pull wire disc and a pull wire, one end of the pull wire is fixed on a tower, and the other end of the pull wire is fixed on the pull wire disc; the stay wire disc is installed on the ground and is used for the upward pulling force acting on the stay wire foundation, the calculated volume weight of soil, the included angle between the stay wire and the ground, the foundation upward pulling stability safety coefficient related to the soil resistance, the upward pulling stability safety coefficient related to the self-gravity of the foundation, the volume of anti-pulling soil in the depth, the upward pulling angle of the foundation and the self-gravity of the foundation. Wherein the upward pulling stability of the stay wire needs to be met. According to the invention, the stress evaluation of the composite pull disc is realized more conveniently.

The invention relates to a water-resisting and water-pumping integrated device for a water-rich stratum foundation pit, and belongs to the field of water-resisting and water-pumping device.The water-resisting and water-pumping integrated device comprises a first barrel, a supporting assembly is installed on the outer side of the first barrel, a water-resisting assembly is arranged below the supporting assembly, a shell is arranged below the water-resisting assembly, and a first through hole is formed in the shell; a first through hole is formed in the first cylinder body, a convex plate is fixedly connected to the first cylinder body, a second cylinder body is fixedly arranged at the bottom of the first cylinder body, a guide drilling tool is installed at the bottom of the second cylinder body, a drilling frame is fixedly arranged on the outer side of the guide drilling tool, and an inner plate and a water pump are installed in the first cylinder body. The water pumping device solves the problems that an existing water pumping device cannot adapt to the gravel stratum for use, cannot automatically increase the self weight while pumping water so as to go deep into the gravel stratum for continuous water pumping, and cannot adapt to uneven wall surfaces on the two sides of a construction foundation pit to achieve the water insulation function.

The jacking device comprises a top pipe joint, a plurality of jacking pipe joints, a jacking assembly, a jacking rack and a retaining supporting component, the jacking assembly is used for vertically jacking the top pipe joint or the jacking pipe joints, and the upper surface of the jacking rack is close to the bottom of a jacking pipe cover of a pipe piece structure; the retaining supporting component is located on the upper surface of the jacking rack and used for temporarily supporting the lower pipe opening of the jacking pipe joint which is jacked in place, so that the jacking assembly retreats to the initial position to jack the next jacking pipe joint, automatic falling of the vertical pipe under the action of self weight and jacking section soil pressure can be effectively prevented, and construction safety and reliability are guaranteed.

To provide a shelf device for allowing an object from being easily taken out from a front side and also enabling reduction of labor in replenishing the objects.SOLUTION: An elevating unit 10 to be vertically operable by driving means 13 is arranged behind shelf units 16. In the shelf unit 16, a rear end part is connected to the elevating unit 10 so as to enable changeover between a forward inclination and a backward inclination for enabling an object placed on the shelf unit 16 to be moved forward or backward by self weight when the elevating unit 10 is vertically operated.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of pneumatic conveying pipeline blockage removing devices, and solves the problem that accumulated particulate matters cannot be dispersed and evacuated by impact generated by release of high-pressure gas for the particulate matters with higher density and larger self weight. The pneumatic conveying pipeline blockage removing device comprises a conveying pipeline, a bottom support is arranged on the bottom face of the conveying pipeline, a top plate is fixed to the side face of the bottom support through a hinge, a threaded hole is formed in the bottom face of the bottom support, the interior of the threaded hole is in threaded connection with a blockage removing assembly, and the top face of the top plate is in threaded connection with a mounting structure. The blockage removing assembly comprises a transducer in threaded connection with the interior of the threaded hole, the surface of the transducer is electrically connected with an ultrasonic generator, a heat dissipation opening is formed in the top surface of the ultrasonic generator, a heat dissipation silica gel pad is arranged in the heat dissipation opening, and the mounting structure comprises a screw in threaded connection with the top surface of the top plate. The bottom end of the screw rod is sleeved with a bearing, and a clamping plate is arranged on the bottom face of the bearing.

The utility model discloses a testing device which comprises a weight disc and further comprises a vertical frame, the front face of the vertical frame is provided with a limiting sliding groove, and a screw rod is installed in the limiting sliding groove in a threaded mode. The measuring mechanism comprises a first sliding block and a bracket, the upper end of the bracket is fixedly connected with the lower portion of the first sliding block, the first sliding block is installed in the limiting sliding groove in a sliding mode, and the weight disc is placed on the bracket; and the jacking mechanism comprises a second sliding block and a damping telescopic rod, the second sliding block is installed in the limiting sliding groove in a sliding mode, and a threaded sleeve block and a clamp are installed on the second sliding block in an embedded mode. Through the self weight of the weight disc and the measuring mechanism and the downward pulling force applied to the organic synthetic material, under the condition that the organic synthetic material deforms, the pulling force applied to the organic synthetic material does not change due to the fact that the overall mass of the weight disc and the measuring mechanism is not changed; and the organic synthetic material with high deformation capability can be effectively tested.

The invention relates to the technical field of grouting construction equipment, in particular to a basement waterproof construction device which comprises a grouting machine body, a grouting pipe is connected to the grouting machine body, a beef tallow head is connected to one end of the grouting pipe, the basement waterproof construction device further comprises a grouting nail, the grouting nail is inserted into a wall, one end of the grouting nail is provided with a hinge head and a clamping groove, and the hinge head is connected with the clamping groove. A clamping jaw sleeve is axially, elastically and slidably arranged on the beef tallow head and used for clamping the clamping groove, a plurality of elastic clamping pieces in the beef tallow head clamp the hinged head, and by arranging a double-clamping structure that the elastic clamping pieces clamp the hinged head and the clamping jaw sleeve clamps the clamping groove, the grouting nail and the beef tallow head form two connecting points. Connection inclination caused by the dead weight of the grouting pipe is avoided, the connection strength is remarkably enhanced, meanwhile, the vibration influence of the grouting machine during working can be counteracted through the cooperation of double clamping and the buffering effect of the elastic piece, shaking or loosening of the connecting position is reduced, the grout leakage risk is reduced, and the sealing effect is guaranteed.

The invention relates to the technical field of precise positioning control, in particular to a two-degree-of-freedom large-stroke motion platform applied to wafer detection, which comprises a base platform and a load platform surface, the top surface of the base platform is provided with a linear motion platform and a rotary motion platform which are coaxially arranged, the linear motion platform is used for driving the load platform surface to do lifting motion, and the rotary motion platform is used for driving the load platform surface to do rotating motion. The rotary motion table is used for driving the linear motion table and the load table top to do circular motion, and the linear motion table comprises a linear actuator, an air floatation guide assembly, a first feedback device and a plate spring. The integrated design is adopted, the Z shaft and the Rz shaft are coaxially arranged and share the same air floatation guide assembly, the number of parts is effectively reduced, the axial space is compressed, the structure is more compact, the size of equipment is reduced, the self weight and the assembly difficulty are reduced, non-mechanical-friction guide is achieved, and the influence of friction on precision is avoided; besides, the plate springs distributed in a single layer achieve flexible decoupling through the axial and radial rigidity difference of the plate springs, motion crosstalk is restrained, and the dynamic response speed can be increased without a complex algorithm.

The utility model provides an adjustable leg training machine which comprises a machine frame, a pedal plate, a bottom frame, a pedal plate frame and a seat, the pedal plate frame comprises a linkage arm and a fixing frame, the bottom end of the bottom frame is hinged to the machine frame, the top end of the bottom frame is hinged to the front end of the linkage arm, and the front end of the linkage arm is connected with a first barbell shaft. The rear end of the bottom frame is fixedly connected with the bottom end of the fixing frame and hinged to the rack, the front side of the top end of the fixing frame is connected with the pedal plate, a second barbell shaft is arranged on the rear side of the fixing frame, and the seat is arranged on the rack through a position adjusting mechanism and an angle adjusting mechanism and located on the front side of the bottom frame. According to the utility model, the seat with adjustable position and backrest angle can be adjusted according to the height, leg length and the like of a trainee, is flexible to use, is more in line with ergonomics, can meet the use requirements of different trainees, and improves the training effect and comfort. Meanwhile, the second barbell shaft is arranged for the trainee with small strength, and the trainee can relieve the self weight of the pedal part by increasing or decreasing the weight of barbell discs on the second barbell shaft.

The utility model relates to the technical field of electric iron towers, in particular to an electric iron tower steel pipe machining and positioning device. According to the technical scheme, the device comprises an operation table, a first lifting mechanism, a clamping and positioning mechanism and a second lifting mechanism, the clamping and positioning mechanism comprises a mounting base, a conical telescopic rod, a motor, a driving wheel, clamping rods and a guide wheel, the conical telescopic rod is mounted in the mounting base through a sliding rail, and two sets of opposite clamping rods are mounted in the mounting base through rotating shafts; guide wheels are installed at the two ends of the clamping rod through shaft bolts. The movable conical telescopic rod moves downwards automatically under the pressure of a steel pipe, the downwards-moving conical telescopic rod extrudes the guide wheels at the bottom of the clamping rod through the inclined faces on the two sides, the clamping rod is turned over to clamp and position the two sides of the pipeline, the function of automatic clamping and positioning through the self weight of the pipeline is achieved, the pipeline clamping and positioning efficiency is improved, and the labor intensity of workers is lowered. And meanwhile, the clamping rods are designed to be turnable so as to adapt to steel pipes with different diameters.

The utility model discloses a large-span steel-concrete mixed continuous rigid frame bridge structure. Comprising a plurality of concrete beam sections, a steel box beam section is arranged between every two adjacent concrete beam sections, the concrete beam sections and the steel box beam sections are connected through steel-concrete connectors, and the concrete beam sections are supported through steel wall piers; steel beam anchoring areas are arranged in the steel beam transition sections of the steel box beam sections, and longitudinal prestressed steel beams in the concrete beam sections penetrate through the adjacent steel-concrete connectors and are anchored in the steel beam anchoring areas on the corresponding sides. According to the utility model, the mid-span part concrete beam is replaced by the steel box beam section, so that the self weight of the structure is reduced, the side-mid span ratio is reduced, the shrinkage creep effect is reduced, the spanning capability of the bridge is improved, and the economic effect is increased; the longitudinal prestressed steel beam penetrates through the steel-concrete connector and is anchored in the steel beam transition section of the steel box beam section, and the connecting strength of the steel box beam section and the concrete beam section can be improved.

The invention belongs to the technical field of new energy charging piles, and particularly discloses a charging pile with a self-protection function, which is mounted between a charging pile body and a fixed seat and comprises an upper support and a lower support, the upper wall of the upper support is fixed on the charging pile body, and the lower support is fixed on the fixed seat. A self-adjusting buffer mechanism is arranged between the upper support and the lower support, the self-adjusting buffer mechanism comprises a damping connecting body, a self-adaptive buffer assembly, a self-weight damping transmission assembly and a self-weight reverse damping assembly, the damping connecting body is arranged between the upper support and the lower support, and the self-adaptive buffer assembly is arranged in the damping connecting body. The linear motion of the connecting sliding block in the upper sliding groove and the linear motion of the sliding aluminum block in the lower sliding groove are converted into rotation of the upper rotating disc and the lower rotating disc, so that the damping effect in the collision direction is ensured, triple damping of the charging pile is achieved through eddy current damping, the spring and the self weight, and the risk of damage to the charging pile is reduced to the maximum extent.

The invention relates to a flexible vibration self-adaption wind turbine blade which comprises a blade body, the rear edge of the blade body is flexibly connected with a flap through an inflatable expansion body, and inflatable cavities are formed in the positions, on the two sides of a chord line, of the expansion body. The chambers located on the two sides of the chord line swing along with the flap to change the compression degree so as to adjust the counter-acting force of the expansion body on the flap in a self-adaptive mode, and the flap angle between the blade body and the flap tends to be stable. The device is simple and compact in structure, light in self weight, high in strength, foldable and rapid to mount; when the blade works and the wind power is large, the flexible structure is affected by the wind power and can be bent upwards, and the stability of the whole blade is guaranteed. When the wind power is reduced, the flexible structure is affected by the pressure difference of the two air chambers and can be bent downwards, the operation efficiency of the blade at the low wind speed can be improved, and the effects of increasing efficiency and expanding stability are achieved.

The utility model belongs to the technical field of urban drainage, and particularly relates to a rainwater drainage device for draining water by means of self weight. Comprising an outer pipe, a closed steel plate, a hemispherical filter cover and a floating cover, the outer pipe is divided into an upper section and a lower section which are respectively arranged above and below the ground; water inlet holes are formed in the side wall of the upper section, and a water seepage micropore array is arranged on the lower section; guide grooves are formed in the two sides of each row of micropore array in the vertical direction; the sealing steel plate can be tightly attached and fixed to the inner side wall of the outer pipe along the guide groove to seal the row micropore array; a permeable hole is formed in the surface of the hemispherical filter cover, is placed from an opening in the top end of the outer pipe, is limited in the upper section and is positioned below the side wall water inlet hole; and the floating cover is provided with a one-way air valve and hermetically covers the top opening of the outer pipe. Under the condition that power is not needed, the drainage speed of rainwater to surrounding stratums is increased, and maintenance is convenient.

The utility model discloses a pulse back-blowing dust remover which comprises a shell, a dust removal unit is arranged in the middle of the shell, a dust removal assembly used for filtering dust is arranged in the dust removal unit, a dust removal subarea is arranged above the dust removal unit, airflow enters the dust removal subarea through the dust removal assembly, and the dust removal subarea is communicated with an exhaust pipeline through a stop valve. The side face of the shell is provided with an air inlet communicated with the air purification chamber, the air inlet is provided with an inwards-opened air door, the air door comprises a door plate, the upper end side of the door plate is hinged to the shell, the door plate is provided with a balance weight and a sealing strip, and closing and sealing of the air door can be achieved by means of self weight. A position sensor is arranged at the door plate to detect opening and closing and opening degree of the door plate, a pulse blowing assembly is arranged above the dust removal unit, the position of the door plate is sensed through the position sensor, and opening or closing of a stop valve and pulse back blowing are controlled. And high-pressure air is saved, the ash removal capability is high, the dust removal efficiency is high, the energy consumption is low, and the operation is stable and reliable.

The utility model discloses a firework cylinder cake forming device which is characterized in that a cylinder flow channel is formed by a material arranging hopper, a storage cavity and a blanking groove which are sequentially arranged from top to bottom, and a forming die is correspondingly arranged in front of the blanking groove; a plurality of fork barrel parts which do reciprocating motion towards the forming dies are arranged corresponding to the discharging grooves, and each fork barrel part penetrates through one discharging groove to feed the barrel in the discharging groove into the forming die in front to form a barrel cake. When the barrel enters the discharging groove, the forming mold is not directly filled with the barrel, and the barrel only needs to smoothly follow the guiding of the material supporting strip based on the self weight and sequentially falls to fill the discharging groove of the vertical channel. By means of the device, it can be guaranteed that all the discharging grooves are filled with the barrels smoothly, the time for filling the discharging grooves is accurate, the follow-up barrel forking piece automatically acts to feed the barrels into a forming mold to form barrel cakes, and bundling is facilitated.

The utility model relates to the technical field of cell culture automation equipment, in particular to an integrated bottle tube placing rack, which comprises a clamping module, a heating module and a bottle cap rack which are respectively arranged on a bottom plate, the clamping module is provided with at least one clamping piece used for clamping a bottle tube, the heating module is provided with a plurality of heating grooves used for placing culture bottles, and the bottle cap rack is arranged on the bottom plate. And the bottle cap frame is provided with a plurality of bottle cap seats. According to the bottle cap placing rack, clamping, heating and bottle cap placing are integrated, matching use of automatic equipment is facilitated, and integrated overhauling is facilitated. After the bottle pipe is clamped by the clamping module, the bottle pipe enables the clamping module to slide by means of self weight, and therefore the clamping module can be matched with the mechanical arm to screw a bottle cap.

The invention provides a refrigerator, belongs to the technical field of household appliances, and aims to solve the technical problem that after a door body of a related refrigerator is opened under the action of external force, the door body is easy to continuously rotate by a larger angle when the external force is relieved. The refrigerator comprises a refrigerator body, a door body and a hinge, the hinge comprises a fixing base, a hinge arm, a transmission assembly and an elastic piece, the fixing base is connected to the refrigerator body, the hinge arm is connected to the door body, the transmission assembly is connected between the fixing base and the hinge arm, and the elastic piece is connected to one rod piece in the transmission assembly. The elastic piece is matched with the other rod piece in the transmission assembly in an abutting mode within at least part of angle range in the rotating process of the door body, so that elastic deformation is generated, and the damping effect on movement of the hinge is achieved. When the door body is opened to a certain door opening angle and external force applied to the door body is relieved, the damping effect from the elastic piece can buffer at least part of door opening force or door closing force, and then the continuous rotating angle of the door body under the influence of inertia, self weight or manufacturing deviation and the like can be reduced.

The invention discloses a mica sheet feeding device of an automatic sheet arranging machine of a groove type commutator, and belongs to the technical field of commutator production equipment. The device comprises a device seat, and a mica sheet transfer seat, a falling seat, a mica sheet feeding device, a negative pressure adsorption device, a detection device, a turnover mechanism, a pushing mechanism, a sheet arrangement turntable, a turntable power motor and an extrusion device which are fixed on the device seat, the mica sheet transfer seat is provided with a column of mica sheet placing grooves, and the falling seat is provided with a corresponding falling channel; the side wall of a mica sheet accommodating seat of the turnover mechanism is provided with a whole circle of mica sheet inserting grooves, and the mica sheet inserting grooves are opposite to the placing grooves in batches through rotation; the mica sheet plug-in groove is in interference fit with the thickness of the mica sheet, so that the mica sheet does not fall off due to self weight and can be pushed by external force. The full-process mechanization of mica sheet feeding, positioning, batch insertion and mold vertical insertion is realized through the automatic mechanism, the problems that the assembly of the groove type commutator depends on manpower and a special feeding device is lacked are solved, and the production efficiency and the product quality can be obviously improved.

The invention discloses a main arch ring design method for rapid construction of a large-span cast-in-cantilever arch bridge. The main arch ring design method comprises the following steps: establishing a macroscopic finite element model according to arch bridge information; a local finite element model is established for the steel-concrete main arch ring, load simulation is conducted on the steel-concrete main arch ring, and arch ring information is determined; obtaining an anti-overturning coefficient of the arch bridge according to the macroscopic finite element model, and obtaining an anti-seismic property value of the arch bridge by utilizing anti-seismic simulation; acquiring disease early warning information according to the load simulation and the anti-seismic simulation, and implementing a disease early warning strategy; load simulation is conducted according to the steel-concrete main arch ring structure through the finite element model, stiffening connection steel plate information and steel hole information of the optimal arch ring strategy are obtained, the load bearing capacity, the anti-seismic performance and the anti-overturning performance of the arch bridge are improved, the self weight of the main arch ring is effectively reduced, arch ring steel bars are connected through the stiffening connection steel plates, and the safety of the arch bridge is improved. Factory-like rapid and high-precision installation of the bottom face is achieved, and the working efficiency and the engineering safety can be greatly improved through whole-section hoisting.

The invention provides a device and a working method of a side face unfolding weight increasing type torpedo anchor. The device comprises an anchor body, a working anchor chain, an unfolding panel and the like, the middle of the anchor body adopts a side unfolding design, and when the working anchor chain is pulled to a middle area, the unfolding panel and a soil body are pushed by a tension transmission structure to be squeezed into a hollow area and a soil holding frame, and the panel is assisted to be continuously unfolded. The unfolding panel is connected with the anchor body through a hinge, has a corresponding area and a soil holding frame, can be unfolded to a control angle, and can be rotated to the optimal orientation before being thrown. The working anchor chain and the lifting chain are matched to enable the torpedo anchor to be in a two-point tension service state. The working method comprises the steps of putting, pulling, unfolding, forming a service state and the like, through the design, the anti-pulling stress area can be increased, the self weight can be increased, the working state that only the tail end of a traditional torpedo anchor is pulled is changed, the anti-pulling bearing capacity and stability of the torpedo anchor are effectively improved, and the torpedo anchor has important application value in the anchoring field of ocean engineering and the like.

The utility model relates to an auxiliary supporting device for a lead screw, which is arranged between a lathe bed workbench and a lathe bed base and comprises a first supporting seat and two second supporting seats connected to two sides of the first supporting seat. A pair of rollers is horizontally and rotatably arranged on the first supporting seat and is used for supporting the lead screw; a third supporting seat is arranged above the second supporting seat, and a bearing is longitudinally and rotatably arranged above the third supporting seat; a supporting rod is arranged below the second supporting seat, and the bottom end of the supporting rod is connected with a connecting block used for being connected with a bed body base. The supporting device is simple in structure, convenient and easy to install and adjust and low in manufacturing and maintenance cost, the lead screw can be effectively supported through the pair of idler wheels, it is ensured that the lead screw within the movement stroke range is stably supported, it is ensured that the lead screw does not droop or deform, downward bending deflection caused by the dead weight of the lead screw is reduced, vibration generated when the lead screw rotates is reduced, and the service life of the lead screw is prolonged. Therefore, the machining precision and the machining quality of the machine tool are improved.

The invention relates to the technical field of autoclave forming dies, and discloses a bullet train protection plate autoclave forming die which comprises a chassis and a bottom plate which are integrated, the bottom face of the chassis is of a grid structure, the top of the chassis is connected with the bottom plate through a supporting structure so that the bottom plate can be communicated with the outside, and a protection plate material containing groove is formed in the top face of the bottom plate. A plurality of through holes are formed in the side face of the chassis so that the through holes in the side face can communicate with the grid structure. Uniform distribution of heat is facilitated, stress concentration is reduced, the heating performance and the heat dissipation performance are improved, and sufficient heat stability and heat conduction coefficient are achieved, so that the production cost is reduced; through combination of a grid structure and a protection plate mold containing groove, the self weight is reduced so as to reduce the production and transportation cost, meanwhile, the strength and rigidity are kept, material use is optimized, reinforcing ribs are combined on the edge of the mold, stability and durability are improved, and fatigue and deformation risks are reduced; the net rack design facilitates heat dissipation, heat stability is improved, forming precision is ensured, and product defects are reduced.