41results about How to "Improve the ability to resist external forces" patented technology

The invention provides a pear seedling cultivation groove with adjustable space size. The pear seedling cultivation groove comprises a groove body, a vertical beam, a cross beam, a water supply pipe,universal wheels, a water diversion disc and a vertical shaft, wherein the groove body comprises a left half groove and a right half groove; the left half groove also comprises a left side plate and aleft outer edge; the left side plate is integrally machined at two sides of the left half groove; the left outer edge is integrally machined at the right side of the left half groove; and the right half groove also comprises a right side plate, a guide rod, a right outer edge and a water seepage hole. According to the invention, the growth expansion force of a gradually developed root system is greater than a spring force, so the left half groove and the right half groove at two side positions expand towards two side positions; the internal volume of the cultivation groove can be increased; the problem that growth and development of seedlings are seriously restricted due to the fact that the size of the cultivation groove is not changed in the growth process of pear seedlings is avoided;the function of changing the density of the pear seedlings is achieved; the row spacing of the seedlings can be conveniently increased when the seedlings gradually grow; and the problems that the growth and development of the seedlings are seriously restricted due to the fact that the seedlings influence one another and compete for illumination, air and the like are solved.

The invention relates to the field of concrete, and particularly discloses a recycled concrete with high compressive strength and a preparation method thereof. The recycled concrete with high compressive strength is prepared from the following raw materials in parts by weight: 90-110 parts of cement; 120-150 parts of recycled aggregate subjected to silicon carbide strengthening treatment; 100-130parts of natural fine aggregate; 0.3-1.2 part of a polypropylene fiber; 8-12 parts of fly ash; 1.5-2.2 parts of a water reducing agent; and 45-55 parts of water; the preparation method comprises the following steps: mixing and stirring the silicon carbide reinforced recycled aggregate, the natural fine aggregate, the polypropylene fiber and fly ash together, adding cement, mixing and stirring, adding the water reducing agent and water, and mixing and stirring to obtain the recycled concrete with high compressive strength. The recycled concrete with high compressive strength has the advantagesof saving gravel resources and being high in compressive strength.

The invention discloses a tensile anti-fatigue high-speed data cable which comprises eight copper conductor pairs; two of eight copper conductor pairs are coated by a second insulating layer; the other six of eight copper conductor pairs are covered on the second insulating layer; the other six of eight copper conductor pairs are coated by a polyester tape layer; the polyester tape layer is coated by a second aluminum plastic composite layer; the second aluminum plastic composite layer comprises a polyester thin film layer and an aluminum thin film layer which coats on the surface of the polyester thin film layer; an aluminum foil layer is coated by a woven shielding layer; the woven shielding layer comprises a plurality of aromatic nylon fibers with a circular section and a plurality of tinning copper wires; the aromatic nylon fibers are coated by a tinning flat copper wire with a rectangular section; and the woven shielding layer comprises a plurality of aromatic nylon fibers and a plurality of tinning copper wires which are crossed and woven. The high-speed data cable provided by the invention enhances tensile anti-fatigue performance and also enhances the shielding performanceof the cable at the same time of ensuring the resistance of the shielding layer.

The invention discloses a packaging structure of heavy current field effect transistors. A conductive base capable of realizing electrical conduction and heat radiation is employed, a bottom surface of a circuit board is fixed on the conductive base, a bottom portion of an electrode connection seat is in conductive connection with a front side of the circuit board, G / S electrode pins of the field effect transistors face towards the electrode connection seat and are welded with the circuit board, and D-electrode pins of the field effect transistors face outside and are in conductive connection with the conductive base so as to realize parallel arrangement of all the field effect transistors. The packaging structure is advantaged in that properties of compact structure, small volume, reliable connection and low cost are realized, the D-electrode pins of all the field effect transistors are conductively welded on the conductive base so as to realize excellent heat radiation, after all the field effect transistors are connected in parallel, output currents are gathered and outputted through the electrode connection seat, and the packaging structure can effectively adapt to heavy-current and large-power work environments.

The invention discloses a PC / ABS material which is wear-resistant and heat-and-humidity resistant and a preparation method thereof, and belongs to the technical field of polymer materials and their forming and processing. The invention discloses a wear-resistant and heat-and-humid PC / ABS material, which is prepared from PC, ABS, modified hydrophobic graphene oxide, a compatibilizer, a toughening agent, an antioxidant and a lubricant. The invention adds the modified hydrophobic graphene oxide into the PC / ABS material as a wear-resistant agent, which has excellent wear-resistant performance; and compared with the traditional modification method, it does not affect the processing performance, has good compatibility, and has no precipitation , the surface of the workpiece and other problems, at the same time, the addition of strong hydrophobic graphene oxide can reduce the water absorption of PC / ABS materials, thereby improving the moisture and heat resistance of the material, and improving the processing of the material due to moisture absorption. It can be widely used in automotive interior parts, home appliances and other fields.

The invention discloses a construction method for installation and positioning of an embedded rubber water-stop belt. A rubber water-stop belt lower combination mould plate and a rubber water-stop belt upper combination mould plate are used, the rubber water-stop belt lower combination mould plate is in butt joint with the lower part of a main keel for preliminary tightening and fixing, the embedded rubber water-stop belt is placed on the rubber water-stop belt lower combination mould plate , a middle hollow circular ring of the embedded rubber water-stop belt is placed flat in a lower seat groove of the water-stop belt, and the rubber water-stop belt upper combination mould plate is in butt joint with the upper part of the main keel for preliminary tightening; and meanwhile an upper seatgroove of the water-stop belt is closed on the middle hollow circular ring of the embedded rubber water-stop belt in a covered mode, the mould plates are then overall reinforced, a pouring mould is erected outside a reinforcement cage, and concrete is poured. According to the construction method for installation and positioning of the embedded rubber water-stop belt, the position of the embedded rubber water-stop belt is fixed through combination of joint sealing materials of a deformation joint and traditional mould plates, the fact that the middle hollow circular ring of the embedded rubberwater-stop belt coincides with the center line of the deformation joint can be ensured all the time.

The invention discloses a battery, a battery module, a battery pack and an electric vehicle. The battery includes a casing and at least two pole core groups, and the casing has a accommodating cavity; the at least two pole core groups are arranged in In the accommodating cavity, the pole core groups are connected in series, and the pole core group includes at least one pole core; the battery further includes a separator, and the separator is arranged between two adjacent pole core groups, so The spacer includes a first spacer and a second spacer, and a gap is set between the first spacer and the second spacer. In the battery provided by the present invention, the first separator and the second separator with a gap are arranged between the pole core groups, which can reduce the weight of the battery while isolating the pole core groups, and is easy to install.

The invention relates to the technical field of anti-theft doors, in particular to an explosion-proof door assembly. An explosion-proof door assembly, which includes a door frame and a door. The door includes a door body and a door lock mechanism. The door body is installed in the door frame. Mechanism, linkage mechanism and locking mechanism, the locking mechanism is connected to and controls the locking mechanism through the linkage mechanism, the locking mechanism includes at least a locking piece connected to the linkage mechanism, and the locking piece includes a connecting section connected to the linkage mechanism, a guide link It not only has a good anti-theft function, but also has a high-quality explosion-proof effect. With the cooperation of various mechanisms, it can realize remote electric control and manual anti-lock function. , and has the ability to resist strong external forces.

The invention relates to the technical field of variable stiffness adjustment equipment, in particular to a continuum variable stiffness adjustment device. The continuum variable stiffness adjustment device includes a worm gear mechanism, a driving mechanism and two driving ropes, the worm gear mechanism includes a worm and two worm wheels, the driving mechanism is connected with the worm, and the worm is arranged on two Between the worm wheels, the two worm wheels are engaged with the worm respectively, and one end of the two driving ropes is respectively wound and connected with the power output ends of the two worm wheels, and one of the driving ropes is provided with Elastic elements. The invention can improve the ability of the continuum actuator to resist external force, achieve the effect of adjusting the stiffness, further improve the flexibility of the continuum actuator, and improve the performance of the continuum actuator.

The invention discloses an ecological bucket for sewage treatment and a construction method thereof. Aiming at the problems of the existing ecological bucket, the ecological bucket is designed as a continuous bucket structure, and each ecological bucket is communicated with each other through a sewage conduit and a water purification conduit; the connected sewage conduit The sewage can be evenly distributed in the ecological buckets, and each ecological bucket can jointly complete the sewage treatment operation. The sewage purification function of each ecological bucket can be fully and reasonably used, and the purification efficiency and purification effect can be significantly improved. The high-capacity sewage purification operation can alleviate the problem of high regional sewage treatment pressure; the connected water purification conduits can evenly obtain purified water from each ecological bucket, and the obtained purified water can be used for irrigation or other purposes. To achieve the purpose of recycling, alleviate the problem of regional water shortage.

The invention relates to the technical field of continuum, in particular to a continuum variable stiffness adjusting mechanical finger. The continuum variable stiffness adjustment mechanical finger includes a variable stiffness adjustment device and a mechanical finger. The variable stiffness adjustment device includes a worm gear mechanism, a driving mechanism, a finger mounting seat and two driving ropes. The mechanical finger includes a finger body, and the finger body is an elastic body. One end of the finger body is installed on the finger mounting seat, and the axial direction of the finger body is provided with a threading hole for the driving rope to pass through. On the side wall of the finger body, a plurality of deformation grooves are opened along the radial direction of the finger body. The axis direction distribution of the finger body. The continuum variable stiffness adjustment mechanical finger provided by the present invention can effectively improve the ability of the mechanical finger to resist external forces, realize the adjustment of the stiffness of the mechanical finger, further improve the flexibility of the mechanical finger, and improve the performance of the mechanical finger.