30results about How to "Reduce void area" patented technology

The invention provides soldering paste and a preparing method thereof and relates to the technical field of soldering materials. The soldering paste is prepared from 90.2-91.8 parts of lead-free metalalloy powder and 8.2-9.8 parts of soldering-aid paste; wherein the soldering-aid paste is prepared from 37-45 parts of a film forming agent, 30-38 parts of a solvent, 10-18 parts of an activating agent, 4-5.5 parts of a thixotropic agent, 1-2.5 parts of a surfactant, 0.4-0.8 part of an antioxidant and 0.3-0.6 part of a corrosion inhibitor; and the activating agent is prepared from organic acid and a bromine-containing compound. The soldering paste can be applied to soldering of electrode terminals of fuses. Continuous production can be achieved through reflow soldering, and the production efficiency can be greatly improved; and meanwhile, copper caps and copper handles are tightly connected after soldering, soldering tin on the peripheral edges is smooth, full and free of sand holes, thehole area is small, and the electrical conductivity and the connection strength are greatly improved.

The invention discloses a circularly polarized eddy electromagnetic wave generating element based on an eight-arm Archimedean spiral antenna, which relates to the field of radio frequency antennas. The circularly polarized eddy electromagnetic wave generating element comprises a dielectric substrate plate, a right-handed metal wire, a grounding metal ring, a coaxial feed, a micro-strip feed network and a metal reflecting plate. The right-handed metal wire is positioned on the front of the dielectric substrate plate. The grounding metal ring is positioned on the back of the dielectric substrateplate, and is connected with the eight-channel micro-strip feed network through the coaxial feed. The micro-strip feed network is a T-shaped junction with multi-stage sections and specified phase shift. The metal reflecting plate is located below the side, where the coaxial feed is arranged, of the dielectric substrate plate, and is electrically connected with the coaxial feed. By adopting an eight-arm Archimedes spiral antenna with a single micro-strip feed network and based on external feeding, the size of the antenna and the complexity of the feed network can be reduced, and eddy electromagnetic waves with adjustable polarization and OAM modes can be generated within a certain bandwidth.

The invention relates to an easy-washing and quick-drying garment provided with a waist-tightening elastic material. The garment comprises a garment body (1) which is made of pure cotton and provided with a V-shaped collar (2), wherein a lower hem (3) is arranged at the bottom of the garment body (1) and adopts an elastic band knitted at the bottom of the garment body (1); a lining layer (4) is woven on the back of the garment body (1) and made of cashmere wool; two pieces of elastic fabric (5) are woven at the waist part of the garment body (1) and made of high-elasticity spandex filaments; the garment body (1) is made of fabric interwoven by warp yarn and weft yarn, the warp yarn and the weft yarn adopt covering yarn of cotton covered polyester filament yarn, and the cross section of the polyester filament yarn is in a pentagram shape. The garment can keep warm effectively, has a windproof effect, and is easy to wash and quick to dry.

The invention discloses a prestressed PBL stiffening-type steel box concrete composite beam and a construction method thereof, and particularly relates to the technical field of composite structures.According to the composite beam, constraint on concrete is higher, and the bearing property is better. A box chamber used for filling of the concrete is formed by web plates and a bottom plate. The top of the box chamber is in an opening shape. The inner surfaces of the web plates and the upper surface of the bottom plate are provided with PBL stiffening ribs. The corresponding PBL stiffening ribsin a compressed area of the box chamber are connected through transverse pull rods. The edges of the two sides of a tensile zone of the box chamber are provided with axial prestressed tendons. Through joint action of the PBL stiffening ribs and the pull rods, the constraint degree on the concrete by the box chamber can be effectively improved, local buckling is avoided, the void area of the concrete and the box chamber is decreased, and interface slip is reduced accordingly; and the tensile zone of the box chamber is provided with the prestressed tendons, the bearing capacity and flexural rigidity can be obviously improved, so that the composite beam has good seismic performance and the stable later bearing capacity, and thus the suitable span of the structure is increased.

The invention relates to the technical field of semiconductors, and particularly discloses a light-emitting diode comprising a substrate, an epitaxial layer, a first passivation layer, inner electrode layers, a second passivation layer and an outer electrode layer, wherein the second passivation layer is provided with fourth slots, and second outer electrode areas are electrically connected with a second inner electrode layer through the fourth slots; and larger than or equal to 2 fourth slots corresponding to each second outer electrode area are arranged, and the fourth slots are arranged at intervals. By means of the mode, the technical problem caused by the fact that a cavity area is too large in the prior art can be solved, the push-pull force level after the light-emitting diode and a packaging support are welded is improved, and the mechanical performance of a light-emitting diode packaging product is improved; and on the other hand, the uniformity of current diffusion and thermal diffusion of the light-emitting diode product can be improved, so that the photoelectric property and the application reliability of the light-emitting diode product are improved.

The invention discloses a three-dimensional greening installation structure, which comprises a fixed frame, a fixed grid and a planting substrate. The fixed frame is fixed on the facade of a buildingor structure, the fixed grid is detachably mounted on the fixed frame, the planting substrate continuously covers the fixed grid, and green plants are directly planted on the planting substrate and form a three-dimensional greening unit. Through the composite support system, the problem of three-dimensional greening support is effectively solved, the support structure is stable and reliable, the operability is strong, the construction speed is fast, and the like; and the void area is reduced, the greening coverage is wider, and the greening effect is more remarkable; the three-dimensional greening installation structure also has the characteristics of convenient and efficient replacement and maintenance of greening plants; and the three-dimensional greening installation structure improvesthe aesthetic effect of the building, and enables maintenance of greening plants to be more efficient and convenient with the help of an automatic drip irrigation system.

The invention provides a fin for a heat exchanger and the heat exchanger with the fin. The fin comprises a windowing part, a first windowing piece and a second windowing piece, wherein an approximately conical space is formed between adjacent windowing parts and is provided with a first end part and a second end part; the width of the first end part is smaller than that of the second end part; the first windowing piece is formed on the windowing part and is close to the first end part; the second windowing piece is formed on the windowing part and is close to the second end part; and the windowing width of the first windowing piece close to the first end part and extending into the first end part of the approximately conical space is smaller than that of the second windowing piece close to the second end part and extending into the second end part of the approximately conical space. Therefore, the windowing piece is wide enough to cover an empty area of a triangular area as much as possible, so that a wind field flowing through the fin is more uniform, and the heat transfer capability of the windowing piece is greatly improved.

The invention discloses a cleaning-convenient tree-pit bottom support plate system and relates to the technical field of plant maintenance devices. The support plate system comprises two support plate bodies. The middle part at one side of each support plate body is provided with a rectangular gap. The parts of the two support plate bodies having the rectangular gaps are arranged opposite to each other. The rectangular gaps which are arranged opposite to each other form a tree trunk through-hole. A connection board is fixed at the lower side face of each support plate body. The connection board is vertically arranged. Two hydraulic rods are arranged along the forward and backward direction on the lower side face of the connection board. The bottom of each hydraulic rod is fixedly connected to the bottom of the tree pit. When a cleaner needs to clean the tree pit, the whole support plate bodies are lifted, and movable ends of the hydraulic rods extend upwards under the force to support the support plate bodies so as to keep the support plate bodies a certain distance above the tree pit. Without the need of taking the support plate bodies out of the tree pit, foreign materials in the tree pit can be removed conveniently.

The invention discloses an antitheft user-friendly tree-pit bottom support plate system and relates to the technical field of plant maintenance devices. The system comprises two support plate bodies. Each support plate body comprises several vertical plates and horizontal plates. The vertical plates at front and back sides of a rectangular gap are all provided with a locking auxiliary member respectively. The locking auxiliary member comprises an inverted trapezoidal part and a cross fold part. The inverted trapezoidal part comprises a first longitudinal rod and a first vertical rod. The first vertical rod passes through the vertical plates and extends above the upper side face of the support plate body. One end of the cross fold part is connected to the upper end of the first vertical rod by welding. The other end of the cross fold part is equipped with a locking ring. The locking rings at left and right sides are locked through a U-shaped lock. The front and back auxiliary locking members are connected together through a connection longitudinal rod. The two support plate bodies of the support plate system are connected as a whole through the locking auxiliary members and the U-shaped lock. Thus, the system can effectively prevent loss, and the support plate bodies can be conveniently lifted according to needs.

The invention discloses a tree-pit bottom support plate system with long service life and relates to the technical field of plant maintenance devices. The system comprises two support plate bodies. Each support plate body comprises several integrated vertical plates. Several horizontal plates are arranged at intervals between each two vertical plates, and the horizontal plates are arranged at intervals along the forward and backward direction of the support plate body. The horizontal plates on a same straight line are connected together through a connecting rod. The horizontal plate which is opposite to a rectangular gap and positioned at the outmost side is provided with a gap. The horizontal plates with the gaps are fixedly connected to the vertical plates, and the horizontal plates are always in the vertical state. The other horizontal plates are fixedly connected to the connecting rod and rotate with rotation of the connecting rod. The system can effectively prevent inconvenience of too much water in the tree pit for pedestrians. In addition, a U-shaped plate is arranged in the gap. Thus, the installation of a drive motor is more convenient, and the overall strength of the gaps at the outmost side of the horizontal plates is enhanced.

The invention relates to a shade cloth garment with a shape memory function. The shade cloth garment is characterized by comprising a garment body (1) made of pure cotton. The garment body (1) is provided with a collar (2) which is V shaped. The bottom of the garment body (1) is provided with a hem (3) which is made of an elastic band at the bottom of the garment body (1). A lining (4) is woven to the back of the garment body (1). The garment body (1) is made of fabric including a surface layer, a lining layer and a middle layer connected between the surface layer and the lining layer. The surface layer and the lining layer are integrally interwoven with warps and wefts. The shade cloth garment with the shape memory function is effective in thermal insulation, has the wind proofing function, restores flat easily, and wrinkles rarely.

The invention relates to an elastic fabric garment provided with a waist-tightening elastic material. The garment comprises a garment body (1) which is made of pure cotton and provided with a V-shaped collar (2), wherein a lower hem (3) is arranged at the bottom of the garment body (1) and adopts an elastic band knitted at the bottom of the garment body (1); a lining layer (4) is woven on the back of the garment body (1) and made of cashmere wool; two pieces of elastic fabric (5) are woven at the waist part of the garment body (1) and made of high-elasticity spandex filaments; and the garment body (1) is made of warp knitting fabric, the yarn laying rule is 1-0/2-3, facing yarn adopts 75D/36 T400 polyester fiber FDY (fully drawn yarn) filament yarn, ground yarn adopts FDY 84D/36F polyester filament yarn, the T400 polyester fiber FDY filament yarn is hollow, and the cross section is cross-shaped. The garment can keep warm effectively and has a windproof effect; and the made fabric is elastic, comfortable, durable, soft, stiff and smooth and has good drapability.

The invention relates to an automatic roll paper packaging machine capable of compressing the volume. The automatic roll paper packaging machine comprises a conveying rail and a compression device for compressing the volume of roll paper. The compression device comprises at least two pressing plates, an extrusion space is formed between any two pressing plates, the extrusion space is communicated with the conveying rail, and when the conveying rail conveys the roll paper into the extrusion space, one end of each of the two pressing plates gets close to each other through a driving part to extrude the roll paper so as to reduce the size of the roll paper. The roll paper is compressed through the compression device, air between every two circles of roll paper is squeezed out, the distance between every two circles of roll paper is smaller, and therefore the shape of the roll paper is changed, and the size of the roll paper is reduced.

The invention relates to an anti-bacterial and crease-resistant garment provided with a waist-tightening elastic material. The garment comprises a garment body (1) which is made of pure cotton and provided with a V-shaped collar (2), wherein a lower hem (3) is arranged at the bottom of the garment body (1) and adopts an elastic band knitted at the bottom of the garment body (1); a lining layer (4) is woven on the back of the garment body (1) and made of cashmere wool; two pieces of elastic fabric (5) are woven at the waist part of the garment body (1) and made of high-elasticity spandex filaments; and the garment body (1) is made of fabric consisting of a front crease-resistant layer, a middle bonding layer and a back anti-bacterial layer, the crease-resistant layer adopts a polyurethane material with a memory function, the bonding layer adopts a thermosetting viscose layer, and the anti-bacterial layer adopts a fabric layer containing nano bamboo carbon fibers. The garment can keep warm effectively, has a windproof effect, and is anti-bacterial and crease-resistant.

The invention discloses a tree-pit bottom support plate system and relates to the technical field of plant maintenance devices. The system comprises two support plate bodies. Each support plate body comprises several integrated vertical plates. Several horizontal plates are arranged at intervals between each two vertical plates, and the horizontal plates are arranged at intervals along the forward and backward direction of the support plate body. The horizontal plates on a same straight line are connected together through a connecting rod. The horizontal plate which is opposite to a rectangular gap and positioned at the outmost side is provided with a gap. The horizontal plates with the gaps are fixedly connected to the vertical plates, and the horizontal plates are always in the vertical state. The other horizontal plates are fixedly connected to the connecting rod and rotate with rotation of the connecting rod. The system can effectively prevent inconvenience of too much water in the tree pit for pedestrians and can effectively prevent moisture from being rapidly evaporated when water in the pit is below the support plates. Thus, watering frequency is reduced.

The invention discloses a working-reliable tree-pit bottom support plate system and relates to the technical field of plant maintenance devices. The system comprises two support plate bodies. Each support plate body comprises several integrated vertical plates. Several horizontal plates are arranged at intervals between each two vertical plates, and the horizontal plates are arranged at intervals along the forward and backward direction of the support plate body. The horizontal plates on a same straight line are connected together through a connecting rod. The horizontal plate which is opposite to a rectangular gap and positioned at the outmost side is provided with a gap. The horizontal plates with the gaps are fixedly connected to the vertical plates, and the horizontal plates are always in the vertical state. The other horizontal plates are fixedly connected to the connecting rod and rotate with rotation of the connecting rod. The system can effectively prevent inconvenience of too much water in the tree pit for pedestrians. In addition, the system is stably powered by mains supply and operates reliably. When foreign materials in the tree pit need to be cleaned up, the support plate bodies can be lifted to keep a certain height. The system is convenient for cleaning.

The invention discloses a tree-pit bottom support plate system having an antitheft function and relates to the technical field of plant maintenance devices. The system comprises two support plate bodies. Each support plate body comprises several vertical plates and horizontal plates. The vertical plates at front and back sides of a rectangular gap are all provided with a locking auxiliary member. The locking auxiliary member comprises an inverted trapezoidal part and a cross fold part. The inverted trapezoidal part comprises a first longitudinal rod and a first vertical rod. The lower end of the first vertical rod is connected to the first longitudinal rod by welding. The first vertical rod passes through the vertical plates and extends above the upper side face of the support plate body. One end of the cross fold part is connected to the upper end of the first vertical rod by welding. The other end of the cross fold part is equipped with a locking ring. The locking rings at left and right sides are locked through a U-shaped lock. The two support plate bodies of the support plate system are connected as a whole through the locking auxiliary members and the U-shaped lock. The system can effectively prevent loss.

The invention discloses a stably-powered tree-pit bottom support plate system and relates to the technical field of plant maintenance devices. The system comprises two support plate bodies. Each support plate body comprises several integrated vertical plates. Several horizontal plates are arranged at intervals between each two vertical plates, and the horizontal plates are arranged at intervals along the forward and backward direction of the support plate body. The horizontal plates on a same straight line are connected together through a connecting rod. The horizontal plate which is opposite to a rectangular gap and positioned at the outmost side is provided with a gap. The horizontal plates with the gaps are fixedly connected to the vertical plates, and the horizontal plates are always in the vertical state. The other horizontal plates are fixedly connected to the connecting rod and rotate with rotation of the connecting rod. The system can effectively prevent inconvenience of too much water in the tree pit for pedestrians. In addition, the system is stably powered by mains supply and operates reliably.

The invention discloses a working-reliable tree-pit bottom support plate system and relates to the technical field of plant maintenance devices. The system comprises two support plate bodies. Each support plate body comprises several integrated vertical plates. Several horizontal plates are arranged at intervals between each two vertical plates, and the horizontal plates are arranged at intervals along the forward and backward direction of the support plate body. The horizontal plates on a same straight line are connected together through a connecting rod. The horizontal plate which is opposite to a rectangular gap and positioned at the outmost side is provided with a gap. The horizontal plates with the gaps are fixedly connected to the vertical plates, and the horizontal plates are always in the vertical state. The other horizontal plates are fixedly connected to the connecting rod and rotate with rotation of the connecting rod. The system can effectively prevent inconvenience of too much water in the tree pit for pedestrians. In addition, the system is stably powered by mains supply and operates reliably. When foreign materials in the tree pit need to be cleaned up, the support plate bodies can be lifted to keep a certain height. The system is convenient for cleaning.

The invention discloses a cleaning-convenient tree-pit bottom support plate system and relates to the technical field of plant maintenance devices. The support plate system comprises two support plate bodies. The middle part at one side of each support plate body is provided with a rectangular gap. The parts of the two support plate bodies having the rectangular gaps are arranged opposite to each other. The rectangular gaps which are arranged opposite to each other form a tree trunk through-hole. A connection board is fixed at the lower side face of each support plate body. The connection board is vertically arranged. Two hydraulic rods are arranged along the forward and backward direction on the lower side face of the connection board. The bottom of each hydraulic rod is fixedly connected to the bottom of the tree pit. When a cleaner needs to clean the tree pit, the hands hold a handle to lift the whole support plate bodies, and movable ends of the hydraulic rods extend upwards under the force to support the support plate bodies so as to keep the support plate bodies a certain distance above the tree pit. Without the need of taking the support plate bodies out of the tree pit, foreign materials in the tree pit can be removed conveniently.