12results about How to "Avoid structural instability" patented technology

The invention provides a clothing pattern intelligent generation method and system based on multi-modal visual identification, and relates to the technical field of visual identification. The method comprises the following steps: firstly, acquiring clothing image data and text description data, performing unified preprocessing, obtaining a style category label, an appearance attribute label and a local contour key point set through multi-modal visual identification, generating structure semantic elements and geometric anchor points by utilizing a semantic-to-structure mapping knowledge base, and constructing a plate type structure diagram; further analyzing the structural constraint and executing constraint solution to generate a candidate pattern; and in combination with manufacturability verification and constraint correction, closed-loop optimization is formed, a target plate type file meeting the structure and manufacturing requirements is output, and effective connection from semantic recognition to plate type structure generation is realized.

The utility model relates to the technical field of bridge construction, and discloses a crossing movable platform attached to a high-altitude bridge, which comprises a space structure body, the top end of the space structure body is fixedly connected with the bottom surface of the bridge, and the space structure body comprises a plurality of polygonal annular frames; each polygonal annular frame comprises a polygonal bottom frame and vertical supporting frames distributed in the circumferential direction of the bottom frame. The multiple polygonal annular frames are sequentially arranged in the length direction of the bridge. The anti-falling net is arranged on the bottom surface and the circumferential direction of the space structure body in a tensioning manner; the climbing entertainment device is located in the space structure body and attached to the space structure body; the corners of the bottom frames of every two adjacent polygonal annular frames are aligned at the top points and connected through circumferential dampers used for consuming horizontal vibration, and metal dampers used for consuming vertical vibration are arranged between the top of the space structure body and the bridge. The technical problems that an ultra-long movable platform attached to a high-altitude bridge is greatly influenced by wind shock, and the sense of safety of tourists is low are solved.

The invention discloses a full-process simulation and blasting pressure prediction method for a weak-rigidity core mold composite material shell, and belongs to the technical field of solid rocket engine integrated explosive forming shell design. The method comprises the following steps: designing an equal residual stress tension system based on a fiber winding layer stress theory; constructing a finite element model in the shell winding process, iteratively optimizing a tension system and determining a stress field and a strain field after winding; taking the stress field and the strain field as predefined fields, constructing a finite element model in the curing process, and calculating the stress field and the strain field after curing; and based on the stress field and the strain field after curing, progressive damage analysis is realized through a three-dimensional Hashin criterion, and the maximum blasting pressure of the shell with the powder is predicted. The problems that in the prior art, a tension system lacks collaborative optimization, simulation cannot cover the whole process, and blasting prediction deviation is large are solved, precise coupling prediction of the process and performance is achieved, and theoretical support is provided for optimization of the integrated forming process.

This invention belongs to the field of flow battery energy storage technology, and relates to a negative electrode electrolyte for alkaline all-iron flow batteries and its preparation method. The negative electrode electrolyte is prepared from iron salts, a complexing agent, a promoting component, an alkaline component, an auxiliary electrolyte, and water. The total iron concentration is 0.1–2.0 mol / L, the molar ratio of the complexing agent to the iron salt is 1.5–4, the molar ratio of the promoting component to Fe is 0.05–1.0, the alkaline component concentration is 2.0–6.0 mol / L, and the auxiliary electrolyte concentration is 0–2.0 mol / L. The negative electrode electrolyte of this invention for alkaline all-iron flow batteries has a high total iron concentration, which not only avoids the precipitation of elemental iron during charging and discharging, but also effectively prevents the formation of ferric hydroxide precipitate, improves the stability of iron ions, and greatly extends the cycle life of the negative electrode electrolyte. It can be widely used in aqueous alkaline all-iron flow batteries.

The utility model provides a bending die for a hydrogen production system, which belongs to the technical field of bending and comprises an elastic support component arranged on an upper die component or a lower die component, die heads are arranged on one side of the lower end of the upper die component and one side of the upper end of the lower die component, the two die heads are arranged in a vertically staggered manner, and the elastic support component is positioned on the outer side of the die heads. The elastic supporting assembly comprises an elastic piece which is arranged at the lower end of the upper die assembly or the upper end of the lower die assembly, a supporting piece is arranged at the end, close to materials, of the elastic piece, the supporting piece is located on the outer side of the die head, and the elastic piece comprises a plurality of nitrogen springs arranged at the lower end of the upper die assembly or the upper end of the lower die assembly. Pressing plates are arranged at the ends, close to the materials, of the nitrogen springs. By means of the elastic supporting assembly, bending stress can be evenly dispersed, structural instability caused by local deformation of a large-size part is avoided, and the height consistency and flatness of a bent part are remarkably improved.

This utility model relates to the field of riveting and welding processing technology, and discloses a riveting and welding processing positioning structure, including a base plate. Connecting columns are fixedly connected to both sides of the upper surface of the base plate. A fixing frame is fixedly connected to the upper ends of the two connecting columns. Working plates are rotatably connected to both sides of the fixing frame. Adjustable clamping mechanisms are provided on both working plates. An angle adjustment mechanism is provided between the two working plates and the base plate. Each adjustable clamping mechanism includes two fixing plates, which are respectively fixedly connected to one side of the upper surface of the working plate at a position close to the front and rear. In this utility model, the adjustable clamping mechanism allows the position of the clamping frame to be adjusted according to the required workpiece length, enabling the clamping of workpieces of different lengths. Furthermore, the angle adjustment mechanism allows the angle of the working plates to be adjusted, thus enabling the processing of workpieces of different shapes and welding positions, resulting in better usability.

This utility model discloses a sanitary three-way valve, comprising a valve body, a valve cover connected to the valve body, a drive component, and a valve core. The valve cover has an outlet end, and the valve core is connected to the drive component and disposed inside the valve body. Specifically, the valve cover consists of a first valve cover, a second valve cover, and a middle valve cover arranged symmetrically, perpendicular to the first valve cover. A reset assembly is disposed between the valve body and the first valve cover. The reset assembly includes a support seat, a spring, and a positioning part. The valve body has a mounting through hole, the support seat is disposed in the mounting through hole, the spring is disposed in the telescopic groove and forms a telescopic cooperation with the positioning part, the first valve cover has a positioning groove, and the positioning part is tightly disposed in the positioning groove. A fastener is disposed on the side of the first valve cover facing the valve core to form a sealing cooperation with the valve body. The purpose of this utility model is to provide a sanitary three-way valve with the advantages of compact structure, improved installation efficiency, and avoidment of structural instability inside the valve body.

The utility model relates to a lamp box mounting technical field especially a side hanging type lamp box, a side hanging type lamp box, including vertical fixed installation's riser, is equipped with the lighting window on the riser, the rotatable lamp box is rotatably installed on the riser through the shaft, the lamp for lighting is installed in the lamp box, and the lamp box can be maintained after turning over upwards. This side hanging type lamp box contains a piece of vertical fixed riser, and the riser is equipped with the lighting window for the light transmission, and the riser is connected with the lamp box that can turn over upwards through the shaft body, and the lamp box is internally provided with the lamp for providing the lighting, when daily using, the light of the lamp can be projected outward through the lighting window, satisfies the illumination or demonstration demand, when the lamp needs to overhaul, replaces or cleans and maintains, only needs to turn over the lamp box upwards, can let the internal lamp completely expose, need not to dismantle the lamp box whole, convenient operation and can complete the maintenance work fast, guarantees the continuous stable operation of the lamp box.

The utility model relates to the technical field of water conservancy facilities, and discloses a steel corrugated plate structure canal which comprises canal assemblies, a plurality of canal assemblies are sequentially connected in the length direction of the canal, each canal assembly comprises a corrugated steel plate, a longitudinal corrugated plate and an upper transverse edge, and the longitudinal corrugated plate is fixedly installed on the inner bottom wall of the corrugated steel plate. The outer side of the upper transverse edge is fixedly connected with a lower folding edge used for limiting downwards, the bottom wall, the side edges, the upper transverse edge and the lower folding edge of the water channel of the steel corrugated plate structure are integrally formed by forging and pressing the corrugated steel plates in the transverse corrugation direction, and no connecting piece is arranged. The integrally forged and formed structure avoids the problem that the structure is unstable due to looseness of the connecting piece, and the integrally formed structure can better maintain the overall integrity and stability when facing water flow impact, foundation settlement, temperature change and other complex external factors.

This utility model relates to an auxiliary fixing device for PC component production, including a frame. The frame is composed of L-shaped steel plates forming a rectangle. Adjacent L-shaped steel plates are connected by quick-locking components. Several clamping components for clamping reinforcing bars are installed on the L-shaped steel plates. A waist-shaped groove is provided on the horizontal folded edge of the L-shaped steel plate. The clamping components are detachably installed on the horizontal folded edge of the L-shaped steel plate by bolts passing through the waist-shaped groove. A non-removable plate is provided on the inner side of the vertical end of the L-shaped steel plate. The non-removable plates are connected end-to-end and fixed through the area enclosed by the L-shaped steel plates. This utility model achieves rapid fixing through the quick-locking and clamping components, and has a simple structure. The clamping components can fix reinforcing bars of different structures and diameters, and are suitable for fixing reinforcing bars of various specifications.

This utility model provides a granulation device for preparing polypropylene composite materials, belonging to the field of polypropylene composite material granulation technology. It includes an extruder and a pelletizer, and further includes a cooling assembly. The cooling assembly is located on one side of the extruder and includes a cooling water tank disposed between the extruder and the pelletizer. Two baffles are installed inside the cooling water tank, and a stainless steel heating plate is installed at the bottom of the cooling water tank. By setting up the cooling assembly, firstly, by inserting two baffles inside the cooling water tank, the inner space of the cooling water tank is divided into three independent areas using the cooperation of the two baffles. High-temperature cooling water is used to pre-cool the material strip to avoid structural instability caused by sudden cooling. Then, deep cooling is achieved through stepped cooling, reducing the temperature difference between the inside and outside of the material strip, reducing the internal stress generated inside the material strip, and improving the granulation quality of the polypropylene composite material granulation device.

The utility model relates to an ornament, in particular to a handicraft ornament, which comprises a support and an ornament body arranged on the support, a positioning mechanism is arranged on one side of the ornament body on the support, and the support comprises a base and a spiral spring rotationally connected onto the base. A spring box and an upper rotating shaft are arranged at the end, close to the positioning mechanism, of the spiral spring, the end, away from the positioning mechanism, of the spring box is connected with the spiral spring, the spring box and the upper rotating shaft are both located in the base, a rotating disc is fixedly connected to the top of the upper rotating shaft, and an iron block is embedded in the top of the rotating disc; and a block-shaped magnet is embedded at the bottom of the placing article. According to the handicraft ornament, the ornament body can be displayed by 360 degrees, watching from different visual angles is facilitated, a more amazing display effect and a more amazing decoration effect are obtained, and the handicraft ornament can be attracted to objects such as a refrigerator through the strip-shaped strong magnet, so that suspension type display is achieved.